CN110281817A - A kind of energy control method of fuel cell engine - Google Patents

Abstract

The invention belongs to the technical field of fuel cell engines, discloses an energy control method for a fuel cell engine, and provides an energy control method for a fuel cell engine that varies with the power demand of a commercial vehicle in view of the defects in the prior art. According to the working principle of the fuel cell engine, the SOC value of the state of charge of the power battery, the power demand of the vehicle and the load of the vehicle, the power generation of the fuel cell engine is automatically adjusted to meet the power requirements of the vehicle and keep the SOC value of the state of charge of the power battery within a reasonable range. Make the fuel cell engine run in a higher efficiency zone, avoid frequent change of working conditions of the fuel cell engine, and increase the life of the fuel cell engine.

Description

A kind of energy control method of fuel cell engine

technical field

The invention belongs to the technical field of fuel cell engines and relates to the matching control of fuel cell engines and vehicles.

Background technique

Chinese patent CN107310420A discloses a low-power fuel cell vehicle and its control system and control method. The vehicle controller determines the power of the fuel cell engine with economical grade power, high grade power, and rated power according to the state of the mode selection switch and the charge value of the power battery. Which power to work with the peak power, and control the fuel cell manager according to the mode of the fuel cell engine, when the charge value of the power battery is within the preset range, the vehicle controller controls the fuel cell manager to start the small The low-power fuel cell engine outputs continuous and stable power, and the power battery is controlled to provide instantaneous power.

Chinese patent CN104827922A discloses a fuel cell vehicle and its control method and control system. According to the fault state of the fuel cell vehicle, the charge value of the power battery and the state of the mode selection switch, the working mode of the fuel cell engine is determined, and the fuel cell engine is controlled according to the mode. The engine manager takes control.

The shortcoming that prior art exists:

1. The power level of the fuel cell engine is determined according to the state of the mode selection switch and the charge value of the power battery, which needs to be adjusted by the driver according to actual needs. It is impossible to make the fuel cell engine work in the economical area and meet the needs of the vehicle according to the actual driving conditions of the vehicle. At the same time, the driver needs to judge the driving conditions and control the mode switch during the driving process of the vehicle, which increases the driving burden of the driver.

2. To determine the working mode of the fuel cell engine according to the fault state of the fuel cell vehicle, the charge value of the power battery and the state of the mode selection switch, the driver needs to select the power following mode or the thermostat mode according to the actual working conditions, which increases the burden on the driver If the driver chooses the power following mode, the fuel cell engine needs to change load frequently, which will damage the life of the fuel cell engine.

Contents of the invention

The object of the present invention is to provide a fuel cell engine energy control method that changes with the power demand of commercial vehicles in order to overcome the above-mentioned shortcomings in the prior art. According to the working principle of the fuel cell engine, the SOC value of the state of charge of the power battery, the power demand of the vehicle and the load of the vehicle, the power generation of the fuel cell engine is automatically adjusted to meet the power requirements of the vehicle and keep the SOC value of the state of charge of the power battery within a reasonable range. Make the fuel cell engine run in a higher efficiency zone, avoid frequent change of working conditions of the fuel cell engine, and increase the service life of the fuel cell engine.

The technical scheme adopted in the present invention is as follows:

Fuel cell engine energy control system, including: fuel cell engine 1, fuel cell DC/DC device 2, motor driver 3, motor 4, power battery DC/DC device 5, power battery 6, fuel cell controller 7, power battery control Device 8, vehicle controller 9, SOC detection device 10, motor rate detection device 11, accessory electrical power detection device 12, load detection device 13.

The vehicle is powered by the power battery and the fuel cell engine. The energy balance equation of the vehicle during driving is as follows:

P _vehicle ＝P _attachment +P _motor ＝P _cell +P _fc

Among them, P _vehicle is the required power of the vehicle, P _attachment is the power consumed by the auxiliary electrical appliances, P _motor is the power consumed by the motor when driving the vehicle, P _cell is the power generated by the power battery; P _fc is the power of the fuel cell engine;

According to the working performance curve of the fuel cell engine, the power range of the fuel cell engine is divided into six intervals: F, A, B, C, D and E. The power at the highest efficiency point of the fuel cell engine is Peffmax, and the power Peff is set to 0.9×Peffmax, The power interval F is the area between the power of the fuel cell engine from 0 to the power of Peff, the power at the rated power point of the fuel cell engine is Pmax, and the interval A is between the power of the fuel cell engine from Peff to Peff+0.2×(Pmax-Peff). , the B section is the area between the fuel cell engine power Peff+0.2×(Pmax-Peff) to Peff+0.4×(Pmax-Peff), and the C section is the fuel cell engine power Peff+0.4×(Pmax -Peff) to Peff+0.6×(Pmax-Peff), the D section is the area between Peff+0.6×(Pmax-Peff) to Peff+0.8×(Pmax-Peff), The E interval is the area between the power of the fuel cell engine from Peff+0.8×(Pmax-Peff) to Pmax.

In the F interval, the efficiency varies greatly with the power, which is not conducive to control. The fuel cell engine does not use the power in the F interval. When the vehicle is running, the fuel cell engine does not work or works in the five intervals of A, B, C, D and E. Set three operating points in each of the five intervals A, B, C, D, and E, and the operating point a1 corresponds to the operating point where the power of the fuel cell engine is Peff+0.15×(Pmax-Peff)/4 , a2 working condition point corresponds to the fuel cell engine power Peff+0.15×(Pmax-Peff)/2 working condition point, a3 working condition point corresponds to the fuel cell engine power Peff+0.15×(Pmax-Peff)×3/4 The operating point of b1 corresponds to the fuel cell engine power of Peff+0.15×(Pmax-Peff)+0.2×(Pmax-Peff)/4, and the b2 operating point corresponds to the fuel cell engine power of Peff +0.15×(Pmax-Peff)+0.2×(Pmax-Peff)/2 operating point, b3 operating point corresponds to fuel cell engine power Peff+0.15×(Pmax-Peff)+0.2×(Pmax-Peff) ×3/4 working condition point, c1 working condition point corresponds to fuel cell engine power Peff+0.35×(Pmax-Peff)+0.2×(Pmax-Peff)/4 working condition point, c2 working condition point corresponds to fuel cell The engine power is the operating point of Peff+0.35×(Pmax-Peff)+0.2×(Pmax-Peff)/2, and the c3 operating point corresponds to the power of the fuel cell engine is Peff+0.35×(Pmax-Peff)+0.2×( Pmax-Peff)×3/4 working condition point, d1 working condition point corresponds to fuel cell engine power Peff+0.55×(Pmax-Peff)+0.2×(Pmax-Peff)/4 working condition point, d2 working condition The point corresponds to the operating point where the fuel cell engine power is Peff+0.55×(Pmax-Peff)+0.2×(Pmax-Peff)/2, and the d3 operating point corresponds to the fuel cell engine power being Peff+0.55×(Pmax-Peff) The working point of +0.2×(Pmax-Peff)×3/4, the working point of e1 corresponds to the working point of fuel cell engine power of Peff+0.75×(Pmax-Peff)+0.25×(Pmax-Peff)/4 , the e2 working condition point corresponds to the fuel cell engine power of Peff+0.75×(Pmax-Peff)+0.25×(Pmax-Peff)/2, and the e3 working condition point corresponds to the fuel cell engine power of Peff+0.75×( Pmax-Peff)+0.25×(Pmax-Peff)×3/4 operating point.

Commercial vehicles run at the same speed, the more cargo they carry, the greater the power consumption rate will be with the greater the load. In order to avoid the power battery SOC from falling too fast and ensure the battery SOC value is within the normal range, according to the light load, medium load, and heavy load Different control strategies are set respectively. When the power of the fuel cell engine is working in the range A to E, the efficiency decreases with the increase of power. The efficiency in the A range is the highest, and the efficiency in the E range is the lowest. In the control strategy, the operating point close to the A range is considered to be preferred.

The load of the commercial vehicle is judged by the load detection device, which is divided into light load, medium load and heavy load. When the load detection device detects that the load is between 0-20% of the maximum load of the vehicle, it is judged as light load; the load detection device When the detected load is between 20% and 60% of the maximum load of the vehicle, it is judged as medium load; when the load detection device detects that the load is between 60% and 100% of the maximum load of the vehicle, it is judged as heavy load;

The rated power output by the fuel cell engine is Pmax, the area between the power 0 and Pmax is divided into 9 intervals, the value of the set power point P1 is 0.11×Pmax; the value of the set power point P2 is 0.22×Pmax; The value of fixed power point P3 is 0.33×Pmax; the value of set power point P4 is 0.44×Pmax; the value of set power point P5 is 0.55×Pmax; the value of set power point P6 is 0.66×Pmax; The value of point P7 is 0.77×Pmax; the value of set power point P8 is 0.88×Pmax;

Set P1, P2, P3, P4, P5, P6, P7, and P8 eight power points in sequence from low to high between 0 and Pmax. The power point between 0 and P1 is the region P_region1, and the power point is P2 to P3. The area between points is P_region2, the power between P3 and P4 is area P_region3, the power is between P4 and P5 is area P_region4, the power is between P4 and P5 is area P_region5, and the power is between P5 and P6 between P6 and P7 is P_region7, between P7 and P8 is P_region8, and between P8 and Pmax is P_region9.

The SOC value of the power battery state of charge is divided into seven stages according to 0 to 100%: when the SOC value of the power battery state of charge is between 100% and 80%, it is set as the Soc_s0 stage; When the SOC value of the power battery state of charge is between 70% and 60%, it is set as the Soc_s2 stage; when the SOC value of the power battery state of charge is between 60% and 50%. When the SOC value of the power battery state of charge is between 50% and 40%, it is set as the Soc_s4 stage; when the SOC value of the power battery state of charge is between 40% and 30%, it is set as the Soc_s5 stage ; When the SOC value of the power battery state of charge is between 30% and 0%, set it to the Soc_min stage.

The vehicle’s demand for fuel cell engine power is calculated based on the average power consumption of the vehicle over a period of time. The power consumption of the vehicle is obtained by the power detection device. The formula for calculating the power Pave required by the vehicle for the fuel cell engine is as follows:

Pave＝[Pave1×(t0-t1)+Pave2×(t1-t2)+Pave3×(t2-t3)]/(t0-t3)

Among them, when the vehicle is running, t0 is the current time point, t1 is the time point before t0, t2 is the time point before t1, t3 is the time point before t2, Pave1 is the average power between t0 and t1, Pave2 is the time point between t1 and t2 The average power between t2 and Pave3 is the average power between t2 and t3. The difference between t0-t1, t1-t2, and t2-t3 is set to a fixed value during the driving process of the vehicle, t0-t1 is set to 1min, t1-t2 is set to 5min, and t2-t3 is set to 10min.

During the running of the vehicle, the fuel cell engine can be in the non-working state, or one of the 15 working state points in the five power ranges of A, B, C, D, and E.

When the load detection device detects that the vehicle is under light load, by detecting the state of charge SOC value of the power battery and the vehicle's required power Pave value for the fuel cell engine, look up Table 1 and Table 2 to judge the working state of the fuel cell engine (non-working state or working status) and working status points.

When the current state of the fuel cell engine is not working, according to Table 1, the next state or power range of the fuel cell engine is judged by the SOC value and Pave value. If the fuel cell engine still needs to be in the non-working state, the fuel cell engine continues to stop If the next state of the fuel cell engine is in the five power ranges of A, B, C, D, and E, select the power range that the fuel cell engine needs to be in according to Table 1, and select the working state point in the corresponding power range according to Table 5.

If the current state of the fuel cell engine is at a certain operating point in the power intervals of A, B, C, D, and E, according to Table 1, the next power interval of the fuel cell engine can be judged by the SOC value and Pave value. If the power of the fuel cell engine The range remains unchanged, and the working state point of the fuel cell engine remains unchanged. If the power range of the fuel cell engine needs to be changed, select the working state point in the corresponding power range according to Table 2.

Table 1

Table 2

In Table 1 and Table 2 - indicates that the fuel cell engine is not working.

When the load detection device detects that the vehicle is at a medium load, by detecting the state of charge SOC value of the power battery and the vehicle's demanded power Pave value for the fuel cell engine, look up Table 3 and Table 4 to determine the working state of the fuel cell engine (not working or working) ) and work status points.

When the current state of the fuel cell engine is not working, according to Table 3, the next state or power range of the fuel cell engine is judged by the SOC value and Pave value. If the fuel cell engine still needs to be in the non-working state, the fuel cell engine continues to stop. If the next state of the fuel cell engine is in the five power ranges of A, B, C, D, and E, select the power range that the fuel cell engine needs to be in according to Table 3, and select the working state point in the corresponding power range according to Table 4.

If the current state of the fuel cell engine is at a certain working state point in the power intervals of A, B, C, D, and E, according to Table 3, the next power interval of the fuel cell engine can be judged by the SOC value and Pave value, if the power of the fuel cell engine The range remains unchanged, and the working state point of the fuel cell engine remains unchanged. If the power range of the fuel cell engine needs to be changed, select the working state point in the corresponding power range according to Table 4.

table 3

Table 4

In Table 3 and Table 4 - indicates that the fuel cell engine does not work.

When the load detection device detects that the vehicle is under heavy load, by detecting the state of charge SOC value of the power battery and the vehicle's demanded power Pave value for the fuel cell engine, look up Table 5 and Table 6 to determine the working state of the fuel cell engine (not working or working) ) and working status points;

When the current state of the fuel cell engine is not working, according to Table 5, the next state or power range of the fuel cell engine is judged by the SOC value and Pave value. If the fuel cell engine still needs to be in the non-working state, the fuel cell engine continues to stop If the next state of the fuel cell engine is in the five power ranges of A, B, C, D, and E, select the power range that the fuel cell engine needs to be in according to Table 5, and select the working state point in the corresponding power range according to Table 6.

When the current state of the fuel cell engine is in one of the power ranges of A, B, C, D, and E, according to Table 5, the next power range of the fuel cell engine can be judged by the SOC value and Pave value. If the power range of the fuel cell engine No change, the working state point of the fuel cell engine remains unchanged. If the power range of the fuel cell engine needs to be changed, select the working state point in the corresponding power range according to Table 6.

table 5

Table 6

In Table 5 and Table 6 - indicates that the fuel cell engine does not work.

Beneficial effects of the present invention:

1. The fuel cell engine automatically selects the operating condition according to the power demand of the vehicle during the driving process of the vehicle, so as to ensure that the fuel cell engine operates in a higher efficiency zone and improve fuel utilization.

2. The fuel cell runs at a limited working state point, avoiding frequent power conversion of the fuel cell engine and improving the life of the fuel cell engine.

Description of drawings

Fig. 1 Schematic diagram of the structure of the fuel cell engine energy control system;

Fig. 2 Schematic diagram of fuel cell engine working performance curve, power range division and operating point;

Figure 3 is a schematic diagram of time point division and power definition for calculating vehicle demand power;

Figure 4 Schematic diagram of fuel cell engine performance curve and power point definition;

Detailed ways

The technical solution of the present invention will be further explained and described in the manner of specific embodiments below.

Fuel cell engine energy control system, including: fuel cell engine 1, fuel cell DC/DC device 2, motor driver 3, motor 4, power battery DC/DC device 5, power battery 6, fuel cell controller 7, power battery control Device 8, vehicle controller 9, SOC detection device 10, motor rate detection device 11, accessory electrical power detection device 12, load detection device 13.

The vehicle is powered by the power battery and the fuel cell engine. The energy balance equation of the vehicle during driving is as follows:

P _vehicle ＝P _attachment +P _motor ＝P _cell +P _fc

Among them, P _vehicle is the required power of the vehicle, P _attachment is the power consumed by the auxiliary electrical appliances, P _motor is the power consumed by the motor when driving the vehicle, P _cell is the power generated by the power battery; P _fc is the power of the fuel cell engine;

According to the working performance curve of the fuel cell engine, the power range of the fuel cell engine is divided into six intervals: F, A, B, C, D and E. The power at the highest efficiency point of the fuel cell engine is Peffmax, and the power Peff is set to 0.9×Peffmax, The power interval F is the area between the power of the fuel cell engine from 0 to the power of Peff, the power at the rated power point of the fuel cell engine is Pmax, and the interval A is between the power of the fuel cell engine from Peff to Peff+0.2×(Pmax-Peff). , the B section is the area between the fuel cell engine power Peff+0.2×(Pmax-Peff) to Peff+0.4×(Pmax-Peff), and the C section is the fuel cell engine power Peff+0.4×(Pmax -Peff) to Peff+0.6×(Pmax-Peff), the D section is the area between Peff+0.6×(Pmax-Peff) to Peff+0.8×(Pmax-Peff), The E interval is the area between the power of the fuel cell engine from Peff+0.8×(Pmax-Peff) to Pmax.

In the F interval, the efficiency varies greatly with the power, which is not conducive to control. The fuel cell engine does not use the power in the F interval. When the vehicle is running, the fuel cell engine does not work or works in the five intervals of A, B, C, D and E. Set three operating points in each of the five intervals A, B, C, D, and E, and the operating point a1 corresponds to the operating point where the power of the fuel cell engine is Peff+0.15×(Pmax-Peff)/4 , a2 working condition point corresponds to the fuel cell engine power Peff+0.15×(Pmax-Peff)/2 working condition point, a3 working condition point corresponds to the fuel cell engine power Peff+0.15×(Pmax-Peff)×3/4 The operating point of b1 corresponds to the fuel cell engine power of Peff+0.15×(Pmax-Peff)+0.2×(Pmax-Peff)/4, and the b2 operating point corresponds to the fuel cell engine power of Peff +0.15×(Pmax-Peff)+0.2×(Pmax-Peff)/2 operating point, b3 operating point corresponds to fuel cell engine power Peff+0.15×(Pmax-Peff)+0.2×(Pmax-Peff) ×3/4 working condition point, c1 working condition point corresponds to fuel cell engine power Peff+0.35×(Pmax-Peff)+0.2×(Pmax-Peff)/4 working condition point, c2 working condition point corresponds to fuel cell The engine power is the operating point of Peff+0.35×(Pmax-Peff)+0.2×(Pmax-Peff)/2, and the c3 operating point corresponds to the power of the fuel cell engine is Peff+0.35×(Pmax-Peff)+0.2×( Pmax-Peff)×3/4 working condition point, d1 working condition point corresponds to fuel cell engine power Peff+0.55×(Pmax-Peff)+0.2×(Pmax-Peff)/4 working condition point, d2 working condition The point corresponds to the operating point where the fuel cell engine power is Peff+0.55×(Pmax-Peff)+0.2×(Pmax-Peff)/2, and the d3 operating point corresponds to the fuel cell engine power being Peff+0.55×(Pmax-Peff) The working point of +0.2×(Pmax-Peff)×3/4, the working point of e1 corresponds to the working point of fuel cell engine power of Peff+0.75×(Pmax-Peff)+0.25×(Pmax-Peff)/4 , the e2 working condition point corresponds to the fuel cell engine power of Peff+0.75×(Pmax-Peff)+0.25×(Pmax-Peff)/2, and the e3 working condition point corresponds to the fuel cell engine power of Peff+0.75×( Pmax-Peff)+0.25×(Pmax-Peff)×3/4 operating point.

Commercial vehicles run at the same speed, the more cargo they carry, the greater the power consumption rate will be with the greater the load. In order to avoid the power battery SOC from falling too fast and ensure the battery SOC value is within the normal range, according to the light load, medium load, and heavy load Different control strategies are set respectively. When the power of the fuel cell engine is working in the range A to E, the efficiency decreases with the increase of power. The efficiency in the A range is the highest, and the efficiency in the E range is the lowest. In the control strategy, the operating point close to the A range is considered to be preferred.

The load of the commercial vehicle is judged by the load detection device, which is divided into light load, medium load and heavy load. When the load detection device detects that the load is between 0-20% of the maximum load of the vehicle, it is judged as light load; the load detection device When the detected load is between 20% and 60% of the maximum load of the vehicle, it is judged as medium load; when the load detection device detects that the load is between 60% and 100% of the maximum load of the vehicle, it is judged as heavy load, as shown in Table 7 shown;

Table 7

light load medium load overload 0-20% 20%-60% 60%-100%

The rated power output by the fuel cell engine is Pmax, the area between the power 0 and Pmax is divided into 9 intervals, the value of the set power point P1 is 0.11×Pmax; the value of the set power point P2 is 0.22×Pmax; The value of fixed power point P3 is 0.33×Pmax; the value of set power point P4 is 0.44×Pmax; the value of set power point P5 is 0.55×Pmax; the value of set power point P6 is 0.66×Pmax; The value of point P7 is 0.77×Pmax; the value of set power point P8 is 0.88×Pmax;

Set P1, P2, P3, P4, P5, P6, P7, and P8 eight power points in sequence from low to high between 0 and Pmax. The power point between 0 and P1 is the region P_region1, and the power point is P2 to P3. The area between points is P_region2, the power between P3 and P4 is area P_region3, the power is between P4 and P5 is area P_region4, the power is between P4 and P5 is area P_region5, and the power is between P5 and P6 The region P_region6 between the power points P6 and P7, the region P_region8 between the power points P7 and P8, and the region P_region9 between the power points P8 and Pmax, as shown in Table 8;

Table 8

P_region1 P_region2 P_region3 P_region4 P_region5 P_region6 P_region7 P_region8 P_region9 0-P1 P1-P2 P2-P3 P3-P4 P4-P5 P5-P6 P6-P7 P7-P8 P8-Pmax

The SOC value of the power battery state of charge is divided into seven stages according to 0 to 100%: when the SOC value of the power battery state of charge is between 100% and 80%, it is set as the Soc_s0 stage; When the SOC value of the power battery state of charge is between 70% and 60%, it is set as the Soc_s2 stage; when the SOC value of the power battery state of charge is between 60% and 50%. When the SOC value of the power battery state of charge is between 50% and 40%, it is set as the Soc_s4 stage; when the SOC value of the power battery state of charge is between 40% and 30%, it is set as the Soc_s5 stage ;When the SOC value of the state of charge of the power battery is between 30% and 0%, set it to the Soc_min stage, as shown in Table 9;

Table 9

Soc_s0 Soc_s1 Soc_s2 Soc_s3 Soc_s4 Soc_s5 Soc_min 100%-80% 80%-70% 70%-60% 60%-50% 50%-40% 40%-30% 30%-0%

The vehicle’s demand for fuel cell engine power is calculated based on the average power consumption of the vehicle over a period of time. The power consumption of the vehicle is obtained by the power detection device. The formula for calculating the power Pave required by the vehicle for the fuel cell engine is as follows:

Pave＝[Pave1×(t0-t1)+Pave2×(t1-t2)+Pave3×(t2-t3)]/(t0-t3)

Among them, when the vehicle is running, t0 is the current time point, t1 is the time point before t0, t2 is the time point before t1, t3 is the time point before t2, Pave1 is the average power between t0 and t1, Pave2 is the time point between t1 and t2 The average power between t2 and Pave3 is the average power between t2 and t3. The difference between t0-t1, t1-t2, and t2-t3 is set to a fixed value during the driving process of the vehicle, t0-t1 is set to 1min, t1-t2 is set to 5min, and t2-t3 is set to 10min.

During the running of the vehicle, the fuel cell engine can be in the non-working state, or one of the 15 working state points in the five power ranges of A, B, C, D, and E.

When the load detection device detects that the vehicle is under light load, by detecting the state of charge SOC value of the power battery and the vehicle's required power Pave value for the fuel cell engine, look up Table 1 and Table 2 to judge the working state of the fuel cell engine (non-working state or working status) and working status points.

The interval time ts is detected, and when the SOC value of the power battery is in the Soc_s1 range and the Pave value is in the P_region1 and P_region2 ranges, the fuel cell engine does not work. When the state of charge SOC value of the power battery is in the Soc_s2 range and the Pave value is in the P_region1 range, the fuel cell engine does not work.

When the last state of the fuel cell engine is not working, the interval time ts is detected. If the SOC value is in the Soc_s1 range and the Pave value is in the P_region3, according to Table 2, the fuel cell engine should work at the a1 operating point. If the SOC value is in the Soc_s1 interval and the Pave value is in the P_region4, according to Table 2, the fuel cell engine should work at the a2 operating point. Similarly, according to Table 2, detect the intervals of the SOC value and the Pave value, and judge other working condition points corresponding to the fuel cell engine.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the previous state is working at the a1 operating point in the A interval, and the interval time ts is detected, if the SOC value is in the Soc_s1 interval and the Pave value is in the P_region4, according to Table 1, The fuel cell engine still needs to work in the A range, and the working point of the fuel cell engine does not change, and is still at the a1 working point. Similarly, if the fuel cell engine is working at the a2 or a3 operating point in the A interval, the interval time ts is detected. According to Table 1, the SOC value and Pave value of the fuel cell engine are in the A interval, and the operating point of the fuel cell engine does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the a1 operating point in the A interval, the time interval ts is detected. According to Table 1, the working interval corresponding to the SOC value and the Pave value is the B interval or In one of intervals C, the operating point of the fuel cell engine needs to be changed. According to Table 2, the operating point of the fuel cell engine is found. If the fuel cell engine in the previous state was working at the a1 operating point in the A section, and the interval time ts was detected, the SOC value was in the Soc_s2 section and the Pave value was in P_region5, the SOC value was in the Soc_s3 section and the Pave value was in P_region4, and the SOC value was in Soc_s4 interval and the Pave value is in P_region3, the SOC value is in the Soc_s5 interval and the Pave value is in P_region2, the working point of the fuel cell engine is changed to the b1 working point; if the fuel cell engine works in the a1 working point of the A interval , interval time ts detection, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region5, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region3, the fuel cell engine working condition point changes It is the b2 operating point; if the fuel cell engine in the previous state was working at the a1 operating point in the A interval, and the interval time ts is detected, the SOC value is in the Soc_s4 interval and the Pave value is in P_region5, the SOC value is in the Soc_s5 interval and the Pave value is in P_region4 , the fuel cell engine working condition point is changed to b3 working condition point; if the fuel cell engine was working at the a1 working condition point in the A range in the last state, and the interval time ts is detected, the SOC value is in the Soc_s5 range and the Pave value is in the P_region5, The working condition point of the fuel cell engine is changed to the c1 working condition point; if the fuel cell engine was working at the a1 working condition point in the A section in the last state, the interval time ts is detected, and the Pave value is arbitrary among P_region5, P_region6, P_region7, P_region8, and P_region9 a range, and the SOC value is in any range of Soc_s1, Soc_s2, Soc_s3, Soc_s4, Soc_s5, the working point of the fuel cell engine is changed to the c1 working point; similarly, if the fuel cell engine works in a2 or a3 of the A range The operating point is detected at an interval of ts, and the operating point where the fuel cell engine should work is judged according to Table 1 and Table 2.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the b1 operating point in the B interval, and the interval time ts is detected, if the SOC value is in the Soc_s2 interval and the Pave value is in the P_region5, according to Table 1, The fuel cell engine still needs to work in the B range, and the working point of the fuel cell engine does not change, and is still at the b1 working point. Similarly, if the fuel cell engine is working at the b2 or b3 operating point of the B interval, the interval time ts is detected. According to Table 1, the fuel cell engine SOC value and Pave value are in the B interval, and the fuel cell engine operating point does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the b1 operating point in the B interval, the interval time ts is detected. According to Table 1, the working interval corresponding to the SOC value and the Pave value is the A interval or In one of intervals C, the operating point of the fuel cell engine needs to be changed. If the fuel cell engine in the previous state was working at the b1 operating point in the B interval, and the interval time ts was detected, the SOC value was in the Soc_s1 interval and the Pave value was in P_region3, the SOC value was in the Soc_s2 interval and the Pave value was in P_region2, and the SOC value was in Soc_s3 interval and the Pave value is in P_region1, the operating point of the fuel cell engine is changed to a1 operating point; if the fuel cell engine in the previous state was operating at the b1 operating point in the B interval, the SOC value is in the Soc_s1 interval and the interval time ts is detected. When the Pave value is in P_region4, the SOC value is in the Soc_s2 interval and the Pave value is in P_region3, the SOC value is in the Soc_s3 interval and the Pave value is in P_region2, the SOC value is in the Soc_s4 interval and the Pave value is in P_region1, the fuel cell engine working condition point changes It is the a2 operating point; if the fuel cell engine in the previous state was working at the b1 operating point in the B interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in P_region5, the SOC value is in the Soc_s2 interval and the Pave value is in P_region4 , when the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region1, the working condition point of the fuel cell engine is changed to a3 working condition point; if the fuel cell engine was working at the b1 operating point in the B interval in the last state, and the interval time ts is detected, the SOC value is in the Soc_s5 interval, and the Pave value is in the P_region5, the fuel cell engine operating point is changed to the c1 operating point; If the fuel cell engine in the previous state was working at the b1 operating point of the B interval, and the interval time ts is detected, when the Pave value is in any interval of P_region5, P_region6, P_region7, P_region8, and P_region9, the fuel cell engine operating point is changed to c1 Operating point; similarly, if the fuel cell engine is working at the b2 or b3 operating point in the B section, check the time interval ts, and judge the operating point where the fuel cell engine should work according to Table 4 and Table 5.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the c1 operating point in the C interval, the time interval ts is detected, and the Pave value is in any interval among P_region5, P_region6, P_region7, P_region8, and P_region9. And when the SOC value is in any interval of Soc_s1, Soc_s2, Soc_s3, Soc_s4, Soc_s5, the working point of the fuel cell engine is the working point of c1, which does not change; When the SOC value is in the Soc_s5 range and the Pave value is in the P_region5, the working point of the fuel cell engine is the c1 working point, which does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the c1 operating point in the C interval, the interval time ts is detected. According to Table 1, the working interval corresponding to the SOC value and the Pave value is the A interval or In one section of section B, the working point of the fuel cell engine needs to change. If the fuel cell engine in the previous state was working at the c1 working point of section C, the SOC value is in the Soc_s1 section and the Pave value is in the interval time ts. In P_region3, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region2, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region1, the operating point of the fuel cell engine is changed to the a1 operating point; The c1 working condition point in the C interval is detected at an interval of ts. When the SOC value is in the Soc_s1 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region2, the SOC When the value is in the Soc_s4 interval and the Pave value is in P_region1, the working point of the fuel cell engine is changed to the a2 operating point; if the fuel cell engine is working in the c1 operating point of the C interval in the previous state, the SOC value is detected at an interval of ts. When the Soc_s1 interval and the Pave value is in P_region5, the SOC value is in the Soc_s2 interval and the Pave value is in P_region4, the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, the SOC value is in the Soc_s5 interval And when the Pave value is in P_region1, the working point of the fuel cell engine is changed to the working point of a3; if the fuel cell engine was working at the working point of c1 in the C interval in the previous state, the SOC value is in the Soc_s2 interval and the Pave When the value is in P_region5, when the SOC value is in the Soc_s3 range and the Pave value is in P_region4, when the SOC value is in the Soc_s4 range and the Pave value is in P_region3, when the SOC value is in the Soc_s5 range and the Pave value is in P_region2, the working point of the fuel cell engine is changed to b1 operating point; if the fuel cell engine in the previous state was working at the c1 operating point in the C interval, and the interval time ts is detected, the SOC value is in the Soc_s3 interval and the Pave value is in P_region5, and the SOC value is in the Soc_s4 interval and the Pave value is in P_region4. , when the SOC value is in the Soc_s5 interval and the Pave value is in the P_region3, the working point of the fuel cell engine is changed to the b2 operating point; The interval time ts is detected, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region5, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region4, the working point of the fuel cell engine is changed to b3.

Table 1

Table 2

In Table 1 and Table 2 - indicates that the fuel cell engine is not working.

When the load detection device detects that the vehicle is at a medium load, by detecting the state of charge SOC value of the power battery and the vehicle's demanded power Pave value for the fuel cell engine, look up Table 3 and Table 4 to determine the working state of the fuel cell engine (not working or working) ) and working status points.

The interval time ts is detected. When the SOC value of the power battery is in the Soc_s1 interval and the Pave value is in the P_region1, the fuel cell engine does not work.

When the last state of the fuel cell engine is not working, and the interval time ts is detected, if the SOC value is in the Soc_s1 range and the Pave value is in the P_region2, according to Table 4, the fuel cell engine should work at the a1 operating point. If the SOC value is in the Soc_s1 interval and the Pave value is in the P_region3, according to Table 4, the fuel cell engine should work at the a2 operating point. Similarly, according to Table 4, detect the intervals of the SOC value and the Pave value, and judge other working condition points corresponding to the fuel cell engine.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the a1 operating point in the A interval, and the interval time ts is detected, if the SOC value is in the Soc_s1 interval and the Pave value is in the P_region3, according to Table 3, The fuel cell engine still needs to work in the A range, and the working point of the fuel cell engine does not change, and is still at the a1 working point. Similarly, if the fuel cell engine is working at the a2 or a3 operating point of the A interval, the interval time ts is detected. According to Table 3, the SOC value and Pave value of the fuel cell engine are in the A interval, and the operating point of the fuel cell engine does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the a1 working condition point in the A section, the interval time ts is detected. According to Table 3, the working interval corresponding to the SOC value and the Pave value is the B interval, In one of intervals C or D, the operating point of the fuel cell engine needs to be changed. According to Table 4, the operating point of the fuel cell engine is found. If the fuel cell engine in the previous state was working at the a1 operating point in the A section, and the interval time ts was detected, the SOC value was in the Soc_s1 section and the Pave value was in P_region5, the SOC value was in the Soc_s2 section and the Pave value was in P_region4, and the SOC value was in Soc_s3 interval and the Pave value is in P_region3, the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, the SOC value is in the Soc_s5 interval and the Pave value is in P_region1, the fuel cell engine operating point is changed to the b1 operating point; if the previous state The fuel cell engine works at the a1 operating point in the A section, and the time interval ts is detected. When the SOC value is in the Soc_s1 section and the Pave value is in P_region6, the SOC value is in the Soc_s2 section and the Pave value is in P_region5, the SOC value is in the Soc_s3 section and the Pave value is In P_region4, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region2, the working point of the fuel cell engine is changed to the b2 operating point; if the fuel cell engine is working in the previous state At the a1 working condition point in section A, the interval time ts is detected, when the SOC value is in the Soc_s1 section and the Pave value is in P_region7, when the SOC value is in the Soc_s2 section and the Pave value is in P_region6, when the SOC value is in the Soc_s3 section and the Pave value is in P_region5, When the SOC value is in the Soc_s4 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region3, the operating point of the fuel cell engine is changed to the b3 operating point; a1 operating point, interval time ts detection, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region7, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region6, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region5, the SOC value is in Soc_s5 interval and the Pave value is in P_region4, the fuel cell engine working condition point is changed to c1 working condition point; if the previous state fuel cell engine was working at the a1 working condition point in the A section, the interval time ts detection, the SOC value is in the Soc_s3 section and When the Pave value is in P_region7, the SOC value is in the Soc_s4 interval and the Pave value is in P_region6, the SOC value is in the Soc_s5 interval and the Pave value is in P_region5, the operating point of the fuel cell engine is changed to the c2 operating point; if the previous state fuel cell The engine works at the a1 working condition point in the A interval, and the SOC value is detected at the time interval ts. When the _s4 interval and the Pave value is in P_region7, the SOC value is in the Soc_s5 interval and the Pave value is in P_region6, the working point of the fuel cell engine is changed to the c3 operating point; if the previous state fuel cell engine is working in the a1 working condition of the A interval Point, interval time ts detection, when the SOC value is in the Soc_s5 interval and the Pave value is in the P_region7, the working point of the fuel cell engine is changed to the working point of d1; Interval time ts detection, when the Pave value is in any interval of P_region8 and P_region9, and the SOC value is in any interval of Soc_s1, Soc_s2, Soc_s3, Soc_s4, Soc_s5, the working condition point of the fuel cell engine is changed to the working condition point of d1; the same If the fuel cell engine is working at the a2 or a3 working condition point in the A section, check the interval time ts, and judge the working condition point where the fuel cell engine should work according to Table 3 and Table 4.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the b1 operating point in the B interval, and the interval time ts is detected, if the SOC value is in the Soc_s2 interval and the Pave value is in the P_region6, according to Table 3, The fuel cell engine still needs to work in the B range, and the working point of the fuel cell engine does not change, and is still at the b1 working point. Similarly, if the fuel cell engine is working at the b2 or b3 operating point of the B interval, the interval time ts is detected. According to Table 3, the fuel cell engine SOC value and Pave value are in the B interval, and the fuel cell engine operating point does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the b1 operating point in the B interval, the interval time ts is detected. According to Table 3, the working interval corresponding to the SOC value and the Pave value is the A interval, In one of the intervals C or D, the operating point of the fuel cell engine needs to be changed. If the fuel cell engine in the previous state was working at the b1 operating point in the B interval, and the interval time ts was detected, the SOC value was in the Soc_s1 interval and the Pave value was in P_region2, and when the SOC value was in the Soc_s2 interval and the Pave value was in P_region1, the fuel cell engine was working The operating point is changed to a1 operating point; if the fuel cell engine in the last state is working at the b1 operating point in the B interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region3, the SOC value is in the Soc_s2 interval and When the Pave value is in P_region2, the SOC value is in the Soc_s3 interval and the Pave value is in P_region1, the operating point of the fuel cell engine is changed to the operating point of a2; Time ts detection, when the SOC value is in the Soc_s1 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region2, the SOC value is in the Soc_s4 interval and the Pave value is in P_region1 , the working condition point of the fuel cell engine is changed to a3 working condition point; if the fuel cell engine was working at the b1 working condition point in the B section in the last state, and the interval time ts is detected, the SOC value is in the Soc_s2 section and the Pave value is in the P_region7, When the SOC value is in the Soc_s3 interval and the Pave value is in P_region6, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region5, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region4, the operating point of the fuel cell engine is changed to the c1 operating point; If the fuel cell engine in the previous state was working at the b1 operating point in the B interval, and the interval time ts was detected, the SOC value was in the Soc_s3 interval and the Pave value was in P_region7, the SOC value was in the Soc_s4 interval and the Pave value was in P_region6, and the SOC value was in Soc_s5 interval and the Pave value is in P_region5, the fuel cell engine working condition point is changed to c2 working condition point; if the fuel cell engine in the previous state was working at the b1 working condition point in the B interval, the interval time ts is detected, and the SOC value is in the Soc_s4 interval and When the Pave value is in P_region7, the SOC value is in the Soc_s5 interval and the Pave value is in P_region6, the operating point of the fuel cell engine is changed to the c3 operating point; Time ts detection, when the SOC value is in the Soc_s5 interval and the Pave value is in the P_region7, the working point of the fuel cell engine is changed to the working point of d1; Interval time ts detection, when the Pave value is in any interval of P_region8 and P_region9, and the SOC value is in any interval of Soc_s1, Soc_s2, Soc_s3, Soc_s4, Soc_s5, the working condition point of the fuel cell engine is changed to the working condition point of d1; the same If the fuel cell engine is working at the b2 or b3 operating point in the B interval, check at intervals of ts, and judge the operating point at which the fuel cell engine should work according to Table 3 and Table 4.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the c1 working condition point in the C interval, and the interval time ts is detected, if the SOC value is in the Soc_s2 interval and the Pave value is in the P_region7, according to Table 3, The fuel cell engine still needs to work in the B range, and the working point of the fuel cell engine does not change, and is still at the c1 working point. In the same way, if the fuel cell engine works at the c2 or c3 operating point of the C interval, the interval time ts is detected. According to Table 3, the fuel cell engine SOC value and Pave value are in the C interval, and the fuel cell engine operating point does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the c1 operating point in the C interval, the interval time ts is detected. According to Table 3, the working interval corresponding to the SOC value and the Pave value is the A interval, In one of intervals B or D, the operating point of the fuel cell engine needs to be changed. If the fuel cell engine in the previous state was working at the c1 operating point in the C interval, and the interval time ts was detected, the SOC value was in the Soc_s1 interval and the Pave value was in P_region2, and when the SOC value was in the Soc_s2 interval and the Pave value was in P_region1, the fuel cell engine was working The operating point is changed to a1 operating point; if the fuel cell engine in the previous state was working at the c1 operating point in the C interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region3, the SOC value is in the Soc_s2 interval and When the Pave value is in P_region2, the SOC value is in the Soc_s3 interval and the Pave value is in P_region1, the operating point of the fuel cell engine is changed to the a2 operating point; Time ts detection, when the SOC value is in the Soc_s1 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region2, the SOC value is in the Soc_s4 interval and the Pave value is in P_region1 , the working condition point of the fuel cell engine is changed to a3 working condition point; if the fuel cell engine was working at the c1 working condition point in the C interval in the last state, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region5, When the SOC value is in the Soc_s2 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region1, the fuel cell The engine working condition point is changed to b1 working condition point; if the fuel cell engine in the previous state was working at the c1 working condition point in the C interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region6, and the SOC value is in the Soc_s2 interval and Pave value is in P_region5, SOC value is in Soc_s3 interval and Pave value is in P_region4, SOC value is in Soc_s4 interval and Pave value is in P_region3, SOC value is in Soc_s5 interval and Pave value is in P_region2, fuel cell engine working condition point is changed to b2 working condition point; if the fuel cell engine in the previous state was working at the c1 working condition point in the C interval, and the interval time ts is detected, when the SOC value is in the Soc_s1 interval and the Pave value is in the P_region7, the SOC value is in the Soc_s2 interval and the Pave value is In P_region6, the SOC value is in the Soc_s3 interval and when the Pave value is in P_region5, the SOC value is in the Soc When the _s4 interval and the Pave value is in P_region4, the SOC value is in the Soc_s5 interval and the Pave value is in P_region3, the fuel cell engine operating point is changed to the b3 operating point; if the previous state fuel cell engine is working in the c1 operating condition of the C interval Point, interval time ts detection, when the SOC value is in the Soc_s5 interval and the Pave value is in the P_region7, the working point of the fuel cell engine is changed to the working point of d1; Interval time ts detection, when the Pave value is in any interval of P_region8 and P_region9, and the SOC value is in any interval of Soc_s1, Soc_s2, Soc_s3, Soc_s4, Soc_s5, the working condition point of the fuel cell engine is changed to the working condition point of d1; the same If the fuel cell engine is working at c2 or c3 operating point in the C interval, check the interval time ts, and judge the operating point at which the fuel cell engine should work according to Table 3 and Table 4.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the d1 operating point in the D interval, the interval time ts is detected, the Pave value is in any interval of P_region8 and P_region9, and the SOC value is in Soc_s1, In any interval of Soc_s2, Soc_s3, Soc_s4, and Soc_s5, the operating point of the fuel cell engine is the operating point of c1, which does not change; if the fuel cell engine in the previous state works at the operating point of d1 in the D interval, the interval time ts Detection, when the SOC value is in the Soc_s5 range, and the Pave value is in the P_region7, the working point of the fuel cell engine is the working point of d1, which does not change;

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the d1 operating point in the D interval, the interval time ts is detected. According to Table 3, the working interval corresponding to the SOC value and the Pave value is the A interval, In one of the intervals B or C, the operating point of the fuel cell engine needs to be changed. If the fuel cell engine in the previous state was working at the d1 operating point in the D interval, and the interval time ts was detected, the SOC value was in the Soc_s1 interval and the Pave value was in P_region2, and the fuel cell engine was working when the SOC value was in the Soc_s2 interval and the Pave value was in P_region1 The operating point is changed to a1 operating point; if the fuel cell engine in the last state is working at the d1 operating point in the D interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region3, the SOC value is in the Soc_s2 interval and When the Pave value is in P_region2, the SOC value is in the Soc_s3 interval and the Pave value is in P_region1, the operating point of the fuel cell engine is changed to the a2 operating point; Time ts detection, when the SOC value is in the Soc_s1 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region2, the SOC value is in the Soc_s4 interval and the Pave value is in P_region1 , the working condition point of the fuel cell engine is changed to a3 working condition point; if the fuel cell engine is working at the d1 working condition point in the D interval in the previous state, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region5, When the SOC value is in the Soc_s2 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region1, the fuel cell The engine working condition point is changed to b1 working condition point; if the fuel cell engine in the last state is working at the d1 working condition point in the D interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region6, and the SOC value is in Soc_s2 interval and Pave value is in P_region5, SOC value is in Soc_s3 interval and Pave value is in P_region4, SOC value is in Soc_s4 interval and Pave value is in P_region3, SOC value is in Soc_s5 interval and Pave value is in P_region2, fuel cell engine working condition point is changed to b2 working condition point; if the fuel cell engine in the last state is working at the d1 working condition point in the D interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region7, the SOC value is in the Soc_s2 interval and the Pave value is In P_region6, the SOC value is in the Soc_s3 interval and when the Pave value is in P_region5, the SOC value is in the Soc When the _s4 interval and the Pave value is in P_region4, the SOC value is in the Soc_s5 interval and the Pave value is in P_region3, the working point of the fuel cell engine is changed to the b3 operating point; if the fuel cell engine works in the b1 working condition of the B interval in the last state Point, time interval ts detection, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region7, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region6, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region5, the SOC value is in the Soc_s5 interval and Pave When the value is in P_region4, the fuel cell engine working condition point is changed to c1 working condition point; if the fuel cell engine was working at the b1 working condition point in the B section in the last state, the SOC value is in the Soc_s3 section and the Pave value is in the interval ts detection. At P_region7, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region6, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region5, the working point of the fuel cell engine is changed to the c2 operating point; The b1 operating point in section B is detected at an interval of ts. When the SOC value is in the Soc_s4 section and the Pave value is in P_region7, when the SOC value is in the Soc_s5 section and the Pave value is in P_region6, the fuel cell engine working condition point is changed to c3 working condition point .

table 3

Table 4

In Table 3 and Table 4 - indicates that the fuel cell engine does not work.

When the load detection device detects that the vehicle is under heavy load, by detecting the state of charge SOC value of the power battery and the vehicle's demanded power Pave value for the fuel cell engine, look up Table 5 and Table 6 to determine the working state of the fuel cell engine (not working or working) ) and working status point;

When the last state of the fuel cell engine is not working, and the interval time ts is detected, if the SOC value is in the Soc_s1 range and the Pave value is in the P_region2, according to Table 6, the fuel cell engine should work at the a2 operating point. If the SOC value is in the Soc_s1 interval and the Pave value is in the P_region3, according to Table 6, the fuel cell engine should work at the b3 operating point. Similarly, according to Table 6, detect the intervals of the SOC value and the Pave value, and judge other working condition points corresponding to the fuel cell engine.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the a2 working condition point in the A interval, and the interval time ts is detected, if the SOC value is in the Soc_s1 interval and the Pave value is in the P_region1, according to Table 5, The fuel cell engine still needs to work in the A range, and the working point of the fuel cell engine does not change, and is still at the a2 working point. In the same way, if the fuel cell engine is working at the a3 operating point in the A interval, and the interval time ts is detected, according to Table 5, the SOC value and Pave value of the fuel cell engine are in the A interval, and the operating point of the fuel cell engine does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the a2 working condition point in the A section, the interval time ts is detected. According to Table 5, the working interval corresponding to the SOC value and the Pave value is the B section, In one of intervals C, D, or E, the operating point of the fuel cell engine needs to change. According to Table 6, find the operating point of the fuel cell engine. If the fuel cell engine in the previous state was working at the a2 operating point in the A section, and the interval time ts was detected, the SOC value was in the Soc_s1 section and the Pave value was in P_region3, the SOC value was in the Soc_s2 section and the Pave value was in P_region2, and the SOC value was in Soc_s3 interval and the Pave value is in P_region1, the fuel cell engine working condition point is changed to b1 working condition point; if the previous state fuel cell engine was working at the a2 working condition point in the A section, the interval time ts is detected, and the SOC value is in the Soc_s1 section and When Pave value is in P_region4, SOC value is in Soc_s2 interval and Pave value is in P_region3, SOC value is in Soc_s3 interval and Pave value is in P_region3, SOC value is in Soc_s4 interval and Pave value is in P_region2, SOC value is in Soc_s5 interval and Pave value In P_region1, the fuel cell engine working condition point is changed to b2 working condition point; if the previous state fuel cell engine is working at the a2 working condition point in the A section, the SOC value is in the Soc_s1 section and the Pave value is in the P_region5. , when the SOC value is in the Soc_s2 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region1, The working condition point of the fuel cell engine is changed to the working condition point b3; if the fuel cell engine was working at the a2 working condition point in the A section in the last state, and the time interval ts is detected, when the SOC value is in the Soc_s1 section and the Pave value is in the P_region6, the SOC value When the Soc_s2 interval and the Pave value is in P_region5, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region2, the fuel cell engine works The operating point is changed to c1 operating point; if the fuel cell engine in the previous state was working at the a2 operating point in the A interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region7, the SOC value is in the Soc_s2 interval and When Pave value is in P_region6, SOC value is in Soc_s3 interval and Pave value is in P_region5, SOC value is in Soc_s4 interval and Pave value is in P_region4, SOC value is in Soc_s5 interval and Pave value is in P_region3, fuel cell engine working condition point changes It is the c2 working condition point; if the fuel cell starts in the last state The engine works at the a2 working condition point in the A section, and the time interval is ts. When the SOC value is in the Soc_s1 section and the Pave value is in P_region8, the SOC value is in the Soc_s2 section and the Pave value is in P_region7, and the SOC value is in the Soc_s3 section and the Pave value is in P_region6. When the SOC value is in the Soc_s4 interval and the Pave value is in P_region5, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region4, the operating point of the fuel cell engine is changed to the c3 operating point; The a2 working condition point in the interval is detected at an interval of ts. When the SOC value is in the Soc_s1 interval and the Pave value is in P_region9, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region8, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region7, the SOC value is When the SOC value is in the Soc_s4 interval and the Pave value is in P_region6, and the SOC value is in the Soc_s5 interval and the Pave value is in P_region5, the working point of the fuel cell engine is changed to the working point of d1; Condition point, interval time ts detection, SOC value in Soc_s2 interval and Pave value in P_region9, SOC value in Soc_s3 interval and Pave value in P_region8, SOC value in Soc_s4 interval and Pave value in P_region7, SOC value in Soc_s5 interval and When the Pave value is in P_region6, the working point of the fuel cell engine is changed to the working point of d2; if the fuel cell engine was working at the working point of a2 in the A section in the previous state, the SOC value is in the Soc_s3 section and the Pave value is detected at an interval of ts. In P_region9, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region8, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region7, the working point of the fuel cell engine is changed to the d3 operating point; if the fuel cell engine is working in the previous state At the working condition point a2 in section A, the interval time ts is detected, when the SOC value is in the Soc_s4 section and the Pave value is in P_region8, when the Pave value is in P_region9, when the SOC value is in the Soc_s5 section and the Pave value is in P_region8, the working condition of the fuel cell engine change point to e1 working condition point; if the fuel cell engine in the last state was working at the a2 working condition point in the A interval, and the interval time ts is detected, when the SOC value is in the Soc_s5 interval and the Pave value is in the P_region9, the fuel cell engine working condition point will be changed to is the working condition point e2; similarly, if the fuel cell engine is working at the working condition point a3 in the A section, the interval time ts is detected, and the fuel cell is judged according to Table 5 and Table 6 The operating point at which the engine should operate.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the b1 operating point in the B interval, and the interval time ts is detected, if the SOC value is in the Soc_s1 interval and the Pave value is in the P_region4, according to Table 5, The fuel cell engine still needs to work in the B range, and the working point of the fuel cell engine does not change, and is still at the b1 working point. Similarly, if the fuel cell engine is working at the b2 or b3 operating point of the B interval, the interval time ts is detected. According to Table 5, the fuel cell engine SOC value and Pave value are in the B interval, and the fuel cell engine operating point does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the b1 operating point in the B interval, the interval time ts is detected. According to Table 5, the working interval corresponding to the SOC value and the Pave value is the A interval, In one of intervals C, D, or E, the operating point of the fuel cell engine needs to change. According to Table 6, find the operating point of the fuel cell engine. If the fuel cell engine in the previous state was working at the b1 operating point in the B interval, and the interval time ts was detected, when the SOC value was in the Soc_s1 interval and the Pave value was in the P_region1, the fuel cell engine operating point was changed to a2 operating point; if the above In a state, the fuel cell engine is working at the b1 operating point in the B interval, and the interval time ts is detected. When the SOC value is in the Soc_s1 interval and the Pave value is in P_region2, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region1, the fuel cell engine is working. point is changed to a3 working condition point; if the fuel cell engine in the last state is working at the b1 working condition point in the B section, and the interval time ts is detected, the SOC value is in the Soc_s1 section and the Pave value is in the P_region6, the SOC value is in the Soc_s2 section and the Pave value is In P_region5, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region2, the operating point of the fuel cell engine is changed to c1 Operating point; if the fuel cell engine in the previous state was working at the b1 operating point in the B interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in P_region7, and the SOC value is in the Soc_s2 interval and the Pave value is in P_region6. When the SOC value is in the Soc_s3 interval and the Pave value is in P_region5, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region3, the operating point of the fuel cell engine is changed to the c2 operating point; If the fuel cell engine in the previous state was working at the b1 operating point in the B interval, and the interval time ts was detected, the SOC value was in the Soc_s1 interval and the Pave value was in P_region8, the SOC value was in the Soc_s2 interval and the Pave value was in P_region7, and the SOC value was in Soc_s3 interval and the Pave value is in P_region6, the SOC value is in the Soc_s4 interval and the Pave value is in P_region5, the SOC value is in the Soc_s5 interval and the Pave value is in P_region4, the fuel cell engine operating point is changed to the c3 operating point; if the previous state The fuel cell engine works at the b1 operating point in the B interval, and the interval time ts is detected. When the SOC value is in the Soc_s1 interval and the Pave value is in P_region9, the SOC value is in the Soc_s2 interval and the Pave value is in P_region8, the SOC value is in the Soc_s3 interval and the Pave value is In P_region7, the SOC value is in the Soc_s4 interval and when the Pave value is in P_region6, the SOC value is in the Soc _s5 interval and Pave value is in P_region5, the fuel cell engine working condition point is changed to d1 working condition point; if the fuel cell engine was working at the b1 working condition point in the B interval in the last state, the SOC value is in the Soc_s2 interval after time ts detection And when Pave value is in P_region9, SOC value is in Soc_s3 interval and Pave value is in P_region8, SOC value is in Soc_s4 interval and Pave value is in P_region7, SOC value is in Soc_s5 interval and Pave value is in P_region6, fuel cell engine working condition point Change to the d2 working condition point; if the fuel cell engine in the previous state was working at the b1 working condition point in the B section, and the interval time ts was detected, the SOC value was in the Soc_s3 section and the Pave value was in the P_region9, the SOC value was in the Soc_s4 section and the Pave value was in the P_region9 At P_region8, when the SOC value is in the Soc_s5 interval and the Pave value is in the P_region7, the fuel cell engine operating point is changed to the d3 operating point; if the fuel cell engine was working at the b1 operating point in the B interval in the previous state, the interval time ts is detected , when the SOC value is in the Soc_s4 interval and the Pave value is in P_region9, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region8, the working point of the fuel cell engine is changed to the e1 working point; When the b1 working condition point is detected at interval time ts, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region9, the fuel cell engine working condition point is changed to the e2 working condition point; similarly, if the fuel cell engine works in the b2 and b3 working condition point, the interval time ts detection, according to table 5 and table 6 to judge the working condition point where the fuel cell engine should work.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the c1 working condition point in the C interval, and the interval time ts is detected, if the SOC value is in the Soc_s1 interval and the Pave value is in the P_region6, according to Table 5, The fuel cell engine still needs to work in the C range, and the working point of the fuel cell engine does not change, and is still at the c1 working point. In the same way, if the fuel cell engine works at the c2 or c3 operating point in the C interval, the interval time ts is detected. According to Table 5, the SOC value and Pave value of the fuel cell engine are in the C interval, and the fuel cell engine operating point does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the c1 working condition point in the C interval, the interval time ts is detected. According to Table 5, the working interval corresponding to the SOC value and the Pave value is the A interval, In one of intervals B, D, or E, the operating point of the fuel cell engine needs to change. According to Table 6, find the operating point of the fuel cell engine. If the fuel cell engine was working at the c1 operating point in the C interval in the last state, and the interval time ts is detected, when the SOC value is in the Soc_s1 interval and the Pave value is in the P_region1, the fuel cell engine operating point is changed to a2 operating point; if the above A state where the fuel cell engine is working at the c1 operating point in the C interval, and the interval time ts is detected. When the SOC value is in the Soc_s1 interval and the Pave value is in P_region2, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region1, the fuel cell engine working condition point is changed to a3 working condition point; if the fuel cell engine in the last state is working at the c1 working condition point in the C interval, and the interval time ts is detected, when the SOC value is in the Soc_s1 interval and the Pave value is in the P_region3, the SOC value is in the Soc_s2 interval and the Pave value is In P_region2, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region1, the operating point of the fuel cell engine is changed to the b1 operating point; if the fuel cell engine was operating in the c1 operating point of the C interval in the previous state, the interval time ts Detection, when the SOC value is in the Soc_s1 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, When the SOC value is in the Soc_s5 interval and the Pave value is in the P_region1, the operating point of the fuel cell engine is changed to the b2 operating point; if the fuel cell engine is operating at the c1 operating point in the C interval in the previous state, the interval time ts is detected, and the SOC value When the Pave value is in the Soc_s1 interval and the Pave value is in P_region5, the SOC value is in the Soc_s2 interval and the Pave value is in P_region4, the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, the SOC value is in Soc_s5 interval and the Pave value is in P_region1, the working point of the fuel cell engine is changed to the b3 operating point; if the fuel cell engine in the previous state was working at the c1 operating point in the C interval, the interval time ts is detected, and the SOC value is in the Soc_s1 interval and When Pave value is in P_region9, SOC value is in Soc_s2 interval and Pave value is in P_region8, SOC value is in Soc_s3 interval and Pave value is in P_region7, SOC value is in Soc_s4 interval and Pave value is in P_region6, SOC value is in Soc_s5 interval and Pave value At P_region5, the working point of the fuel cell engine is changed to the working point of d1; if the fuel cell engine was working in the C range in the last state The c1 working condition point is detected at an interval of ts. When the SOC value is in the Soc_s2 interval and the Pave value is in P_region9, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region8, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region7, the SOC value is in When the Soc_s5 interval and the Pave value is in P_region6, the working point of the fuel cell engine is changed to the d2 operating point; if the fuel cell engine was working at the c1 operating point in the C interval in the previous state, the SOC value is in the Soc_s3 interval after time ts detection And when the Pave value is in P_region9, the SOC value is in the Soc_s4 range and the Pave value is in P_region8, the SOC value is in the Soc_s5 range and the Pave value is in P_region7, the working point of the fuel cell engine is changed to the d3 working point; The battery engine works at the c1 operating point in the C interval, and the interval time ts is detected. When the SOC value is in the Soc_s4 interval and the Pave value is in P_region9, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region8, the fuel cell engine operating point is changed to e1 operating point; if the fuel cell engine was working at the c1 operating point in the C interval in the previous state, and the interval time ts is detected, when the SOC value is in the Soc_s5 interval and the Pave value is in the P_region9, the fuel cell engine operating point is changed to e2 operating point In the same way, if the fuel cell engine works at the c2 and c3 operating points of the C interval, the interval time ts is detected, and the operating point at which the fuel cell engine should work is judged according to Table 5 and Table 6.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the d1 operating point in the D interval, and the interval time ts is detected, if the SOC value is in the Soc_s1 interval and the Pave value is in the P_region9, according to Table 5, The fuel cell engine still needs to work in the D range, and the working point of the fuel cell engine does not change, and is still at the d1 working point. Similarly, if the fuel cell engine is working at the d2 or d3 operating point of the D interval, and the interval time ts is detected, according to Table 5, the fuel cell engine SOC value and Pave value are in the D interval, and the fuel cell engine operating point does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the d1 operating point in the D interval, the interval time ts is detected. According to Table 5, the working interval corresponding to the SOC value and the Pave value is the A interval, In one of intervals B, C, or E, the operating point of the fuel cell engine needs to change. According to Table 6, find the operating point of the fuel cell engine. If the fuel cell engine was working at the d1 operating point in the D interval in the previous state, and the interval time ts is detected, when the SOC value is in the Soc_s1 interval and the Pave value is in the P_region1, the fuel cell engine operating point is changed to a2 operating point; if the above In a state, the fuel cell engine is working at the d1 operating point in the D interval, and the interval time ts is detected. When the SOC value is in the Soc_s1 interval and the Pave value is in P_region2, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region1, the fuel cell engine is working. point is changed to a3 working condition point; if the fuel cell engine in the last state is working at the d1 working condition point in the D interval, and the interval time ts is detected, when the SOC value is in the Soc_s1 interval and the Pave value is in the P_region3, the SOC value is in the Soc_s2 interval and the Pave value is In P_region2, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region1, the operating point of the fuel cell engine is changed to the b1 operating point; if the fuel cell engine was operating in the d1 operating point of the D interval in the previous state, the interval time ts Detection, when the SOC value is in the Soc_s1 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, When the SOC value is in the Soc_s5 interval and the Pave value is in the P_region1, the operating point of the fuel cell engine is changed to the b2 operating point; if the fuel cell engine is operating in the d1 operating point of the D interval in the previous state, the interval time ts is detected, and the SOC value When the Pave value is in the Soc_s1 interval and the Pave value is in P_region5, the SOC value is in the Soc_s2 interval and the Pave value is in P_region4, the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, the SOC value is in Soc_s5 interval and the Pave value is in P_region1, the fuel cell engine working condition point is changed to b3 working condition point; if the fuel cell engine in the last state is working at the d1 working condition point in the D interval, the SOC value is in the Soc_s1 interval and the interval time ts is detected When Pave value is in P_region6, SOC value is in Soc_s2 interval and Pave value is in P_region5, SOC value is in Soc_s3 interval and Pave value is in P_region4, SOC value is in Soc_s4 interval and Pave value is in P_region3, SOC value is in Soc_s5 interval and Pave value At P_region2, the working point of the fuel cell engine is changed to the c1 working point; if the fuel cell engine was working in the D range in the last state The d1 working condition point is detected at an interval of ts. When the SOC value is in the Soc_s1 interval and the Pave value is in P_region7, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region6, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region5, the SOC value is in When the Soc_s4 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region3, the working point of the fuel cell engine is changed to the c2 operating point; if the fuel cell engine is working in the d1 working condition of the D interval in the previous state Point, interval time ts detection, when the SOC value is in the Soc_s1 interval and the Pave value is in P_region8, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region7, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region6, the SOC value is in the Soc_s4 interval and Pave When the value is in P_region5, the SOC value is in the Soc_s5 interval and the Pave value is in P_region4, the operating point of the fuel cell engine is changed to the c3 operating point; if the previous state fuel cell engine is operating in the d1 operating point of the D interval, the time interval ts detection, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region9, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region8, the operating point of the fuel cell engine is changed to the e1 operating point; The d1 operating point in the D interval is detected at an interval of ts. When the SOC value is in the Soc_s5 interval and the Pave value is in the P_region9, the fuel cell engine operating point is changed to the e2 operating point; similarly, if the fuel cell engine works in the D interval Working condition points d2 and d3 are detected at an interval of ts, and the working condition point where the fuel cell engine should work is judged according to Table 5 and Table 6.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the e1 operating point in the E interval, and the interval time ts is detected, if the SOC value is in the Soc_s4 interval and the Pave value is in the P_region9, according to Table 5, The fuel cell engine still needs to work in the E range, and the working point of the fuel cell engine does not change, and is still at the e1 working point. Similarly, if the fuel cell engine is working at the e2 or e3 operating point in the E interval, the interval time ts is detected. According to Table 5, the SOC value and Pave value of the fuel cell engine are in the E interval, and the operating point of the fuel cell engine does not change.

When the last state of the fuel cell engine is the working state, if the fuel cell engine in the last state is working at the e1 operating point in the E interval, the interval time ts is detected. According to Table 5, the working interval corresponding to the SOC value and the Pave value is the A interval, In one of intervals B, C, or D, the operating point of the fuel cell engine needs to be changed. According to Table 6, find the operating point of the fuel cell engine. If the fuel cell engine was working at the e1 operating point in the E interval in the previous state, and the interval time ts is detected, when the SOC value is in the Soc_s1 interval and the Pave value is in the P_region1, the fuel cell engine operating point is changed to a2 operating point; if the above A state where the fuel cell engine is working at the e1 operating point in the E interval, and the interval time ts is detected. When the SOC value is in the Soc_s1 interval and the Pave value is in P_region2, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region1, the fuel cell engine is in working condition point is changed to a3 operating condition point; if the fuel cell engine in the previous state was working at the e1 operating condition point in the E interval, and the interval time ts is detected, the SOC value is in the Soc_s1 interval and the Pave value is in the P_region3, the SOC value is in the Soc_s2 interval and the Pave value is In P_region2, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region1, the operating point of the fuel cell engine is changed to the b1 operating point; if the fuel cell engine was operating in the e1 operating point of the E interval in the previous state, the interval time ts Detection, when the SOC value is in the Soc_s1 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, When the SOC value is in the Soc_s5 interval and the Pave value is in the P_region1, the operating point of the fuel cell engine is changed to the b2 operating point; if the fuel cell engine is operating in the e1 operating point of the E interval in the previous state, the interval time ts is detected, and the SOC value When the Pave value is in the Soc_s1 interval and the Pave value is in P_region5, the SOC value is in the Soc_s2 interval and the Pave value is in P_region4, the SOC value is in the Soc_s3 interval and the Pave value is in P_region3, the SOC value is in the Soc_s4 interval and the Pave value is in P_region2, the SOC value is in Soc_s5 interval and the Pave value is in P_region1, the fuel cell engine working condition point is changed to b3 working condition point; if the fuel cell engine in the last state is working at the e1 working condition point in the E interval, the SOC value is in the Soc_s1 interval and the interval time ts is detected When Pave value is in P_region6, SOC value is in Soc_s2 interval and Pave value is in P_region5, SOC value is in Soc_s3 interval and Pave value is in P_region4, SOC value is in Soc_s4 interval and Pave value is in P_region3, SOC value is in Soc_s5 interval and Pave value At P_region2, the working point of the fuel cell engine is changed to the c1 working point; if the fuel cell engine was working in the E range in the last state The e1 working condition point is detected at an interval of ts. When the SOC value is in the Soc_s1 interval and the Pave value is in P_region7, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region6, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region5, the SOC value is in When the Soc_s4 interval and the Pave value is in P_region4, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region3, the working point of the fuel cell engine is changed to the c2 operating point; if the previous state, the fuel cell engine is working in the e1 working condition of the E interval Point, interval time ts detection, when the SOC value is in the Soc_s1 interval and the Pave value is in P_region8, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region7, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region6, the SOC value is in the Soc_s4 interval and Pave When the value is in P_region5, the SOC value is in the Soc_s5 interval and the Pave value is in P_region4, the operating point of the fuel cell engine is changed to the c3 operating point; if the fuel cell engine is operating in the e1 operating point of the E interval in the previous state, the time interval ts detection, when the SOC value is in the Soc_s1 interval and the Pave value is in P_region9, when the SOC value is in the Soc_s2 interval and the Pave value is in P_region8, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region7, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region6 , when the SOC value is in the Soc_s5 interval and the Pave value is in the P_region5, the operating point of the fuel cell engine is changed to the operating point of d1; if the fuel cell engine is operating in the e1 operating point of the E interval in the previous state, the interval time ts is detected, and the SOC When the value is in the Soc_s2 interval and the Pave value is in P_region9, when the SOC value is in the Soc_s3 interval and the Pave value is in P_region8, when the SOC value is in the Soc_s4 interval and the Pave value is in P_region7, when the SOC value is in the Soc_s5 interval and the Pave value is in P_region6, the fuel cell engine The working condition point is changed to the d2 working condition point; if the fuel cell engine in the last state is working at the e1 working condition point in the E interval, and the interval time ts is detected, the SOC value is in the Soc_s3 interval and the Pave value is in the P_region9, and the SOC value is in the Soc_s4 interval And when the Pave value is in P_region8, the SOC value is in the Soc_s5 interval and the Pave value is in P_region7, the working point of the fuel cell engine is changed to the working point of d3; similarly, if the fuel cell engine works in the e2 and e3 working conditions of the E interval Points are detected at intervals of ts, and according to Table 5 and Table 6, it is judged that the working condition point of the fuel cell engine should work.

table 5

Table 6

In Table 5 and Table 6 - indicates that the fuel cell engine does not work.

Claims (1)

1. An energy control method of a fuel cell engine, specifically as follows: The vehicle is powered by the power battery and the fuel cell engine. The energy balance equation of the vehicle during driving is as follows: P _vehicle ＝P _attachment +P _motor ＝P _cell +P _fc Among them, P _vehicle is the required power of the vehicle, P _attachment is the power consumed by the auxiliary electrical appliances, P _motor is the power consumed by the motor when driving the vehicle, P _cell is the power generated by the power battery; P _fc is the power of the fuel cell engine; According to the working performance curve of the fuel cell engine, the power range of the fuel cell engine is divided into six intervals: F, A, B, C, D and E. The power at the highest efficiency point of the fuel cell engine is Peffmax, and the power Peff is set to 0.9×Peffmax, The power interval F is the area between the power of the fuel cell engine from 0 to the power of Peff, the power at the rated power point of the fuel cell engine is Pmax, and the interval A is between the power of the fuel cell engine from Peff to Peff+0.2×(Pmax-Peff). , the B section is the area between the fuel cell engine power Peff+0.2×(Pmax-Peff) to Peff+0.4×(Pmax-Peff), and the C section is the fuel cell engine power Peff+0.4×(Pmax -Peff) to Peff+0.6×(Pmax-Peff), the D section is the area between Peff+0.6×(Pmax-Peff) to Peff+0.8×(Pmax-Peff), The E interval is the area between the power of the fuel cell engine from Peff+0.8×(Pmax-Peff) to Pmax. In the F interval, the efficiency varies greatly with the power, which is not conducive to control. The fuel cell engine does not use the power in the F interval. When the vehicle is running, the fuel cell engine does not work or works in the five intervals of A, B, C, D and E. Set three operating points in each of the five intervals A, B, C, D, and E, and the operating point a1 corresponds to the operating point where the power of the fuel cell engine is Peff+0.15×(Pmax-Peff)/4 , a2 working condition point corresponds to the fuel cell engine power Peff+0.15×(Pmax-Peff)/2 working condition point, a3 working condition point corresponds to the fuel cell engine power Peff+0.15×(Pmax-Peff)×3/4 The operating point of b1 corresponds to the fuel cell engine power of Peff+0.15×(Pmax-Peff)+0.2×(Pmax-Peff)/4, and the b2 operating point corresponds to the fuel cell engine power of Peff +0.15×(Pmax-Peff)+0.2×(Pmax-Peff)/2 operating point, b3 operating point corresponds to fuel cell engine power Peff+0.15×(Pmax-Peff)+0.2×(Pmax-Peff) ×3/4 working condition point, c1 working condition point corresponds to fuel cell engine power Peff+0.35×(Pmax-Peff)+0.2×(Pmax-Peff)/4 working condition point, c2 working condition point corresponds to fuel cell The engine power is the operating point of Peff+0.35×(Pmax-Peff)+0.2×(Pmax-Peff)/2, and the c3 operating point corresponds to the power of the fuel cell engine is Peff+0.35×(Pmax-Peff)+0.2×( Pmax-Peff)×3/4 working condition point, d1 working condition point corresponds to fuel cell engine power Peff+0.55×(Pmax-Peff)+0.2×(Pmax-Peff)/4 working condition point, d2 working condition The point corresponds to the operating point where the fuel cell engine power is Peff+0.55×(Pmax-Peff)+0.2×(Pmax-Peff)/2, and the d3 operating point corresponds to the fuel cell engine power being Peff+0.55×(Pmax-Peff) The working point of +0.2×(Pmax-Peff)×3/4, the working point of e1 corresponds to the working point of fuel cell engine power of Peff+0.75×(Pmax-Peff)+0.25×(Pmax-Peff)/4 , the e2 working condition point corresponds to the fuel cell engine power of Peff+0.75×(Pmax-Peff)+0.25×(Pmax-Peff)/2, and the e3 working condition point corresponds to the fuel cell engine power of Peff+0.75×( Pmax-Peff)+0.25×(Pmax-Peff)×3/4 operating point. Commercial vehicles run at the same speed, the more cargo they carry, the greater the power consumption rate will be with the greater the load. In order to avoid the power battery SOC from falling too fast and ensure the battery SOC value is within the normal range, according to the light load, medium load, and heavy load Different control strategies are set respectively. When the power of the fuel cell engine is working in the range A to E, the efficiency decreases with the increase of power. The efficiency in the A range is the highest, and the efficiency in the E range is the lowest. In the control strategy, the operating point close to the A range is considered to be preferred. The load of the commercial vehicle is judged by the load detection device, which is divided into light load, medium load and heavy load. When the load detection device detects that the load is between 0-20% of the maximum load of the vehicle, it is judged as light load; the load detection device When the detected load is between 20% and 60% of the maximum load of the vehicle, it is judged as medium load; when the load detection device detects that the load is between 60% and 100% of the maximum load of the vehicle, it is judged as heavy load; The rated power output by the fuel cell engine is Pmax, the area between the power 0 and Pmax is divided into 9 intervals, the value of the set power point P1 is 0.11×Pmax; the value of the set power point P2 is 0.22×Pmax; The value of fixed power point P3 is 0.33×Pmax; the value of set power point P4 is 0.44×Pmax; the value of set power point P5 is 0.55×Pmax; the value of set power point P6 is 0.66×Pmax; The value of point P7 is 0.77×Pmax; the value of set power point P8 is 0.88×Pmax; Set P1, P2, P3, P4, P5, P6, P7, and P8 eight power points in sequence from low to high between 0 and Pmax. The power point between 0 and P1 is the region P_region1, and the power point is P2 to P3. The area between points is P_region2, the power between P3 and P4 is area P_region3, the power is between P4 and P5 is area P_region4, the power is between P4 and P5 is area P_region5, and the power is between P5 and P6 between P6 and P7 is P_region7, between P7 and P8 is P_region8, and between P8 and Pmax is P_region9. The SOC value of the power battery state of charge is divided into seven stages according to 0 to 100%: when the SOC value of the power battery state of charge is between 100% and 80%, it is set as the Soc_s0 stage; When the SOC value of the power battery state of charge is between 70% and 60%, it is set as the Soc_s2 stage; when the SOC value of the power battery state of charge is between 60% and 50%. When the SOC value of the power battery state of charge is between 50% and 40%, it is set as the Soc_s4 stage; when the SOC value of the power battery state of charge is between 40% and 30%, it is set as the Soc_s5 stage ; When the SOC value of the power battery state of charge is between 30% and 0%, set it to the Soc_min stage. The vehicle’s demand for fuel cell engine power is calculated based on the average power consumption of the vehicle over a period of time. The power consumption of the vehicle is obtained by the power detection device. The formula for calculating the power Pave required by the vehicle for the fuel cell engine is as follows: Pave＝[Pave1×(t0-t1)+Pave2×(t1-t2)+Pave3×(t2-t3)]/(t0-t3) Among them, when the vehicle is running, t0 is the current time point, t1 is the time point before t0, t2 is the time point before t1, t3 is the time point before t2, Pave1 is the average power between t0 and t1, Pave2 is the time point between t1 and t2 The average power between t2 and Pave3 is the average power between t2 and t3. The difference between t0-t1, t1-t2, and t2-t3 is set to a fixed value during the driving process of the vehicle, t0-t1 is set to 1min, t1-t2 is set to 5min, and t2-t3 is set to 10min. During the running of the vehicle, the fuel cell engine can be in the non-working state, or one of the 15 working state points in the five power ranges of A, B, C, D, and E. When the load detection device detects that the vehicle is under light load, by detecting the state of charge SOC value of the power battery and the vehicle's required power Pave value for the fuel cell engine, look up Table 1 and Table 2 to judge the working state of the fuel cell engine (non-working state or working status) and working status points. When the current state of the fuel cell engine is not working, according to Table 1, the next state or power range of the fuel cell engine is judged by the SOC value and Pave value. If the fuel cell engine still needs to be in the non-working state, the fuel cell engine continues to stop If the next state of the fuel cell engine is in the five power ranges of A, B, C, D, and E, select the power range that the fuel cell engine needs to be in according to Table 1, and select the working state point in the corresponding power range according to Table 5. If the current state of the fuel cell engine is at a certain operating point in the power intervals of A, B, C, D, and E, according to Table 1, the next power interval of the fuel cell engine can be judged by the SOC value and Pave value. If the power of the fuel cell engine The range remains unchanged, and the working state point of the fuel cell engine remains unchanged. If the power range of the fuel cell engine needs to be changed, select the working state point in the corresponding power range according to Table 2. Table 1 Table 2 In Table 1 and Table 2 - indicates that the fuel cell engine is not working. When the load detection device detects that the vehicle is at a medium load, by detecting the state of charge SOC value of the power battery and the vehicle's demanded power Pave value for the fuel cell engine, look up Table 3 and Table 4 to determine the working state of the fuel cell engine (not working or working) ) and working status points. When the current state of the fuel cell engine is not working, according to Table 3, the next state or power range of the fuel cell engine is judged by the SOC value and Pave value. If the fuel cell engine still needs to be in the non-working state, the fuel cell engine continues to stop. If the next state of the fuel cell engine is in the five power ranges of A, B, C, D, and E, select the power range that the fuel cell engine needs to be in according to Table 3, and select the working state point in the corresponding power range according to Table 4. If the current state of the fuel cell engine is at a certain working state point in the power intervals of A, B, C, D, and E, according to Table 3, the next power interval of the fuel cell engine can be judged by the SOC value and Pave value, if the power of the fuel cell engine The range remains unchanged, and the working state point of the fuel cell engine remains unchanged. If the power range of the fuel cell engine needs to be changed, select the working state point in the corresponding power range according to Table 4. table 3 Table 4 In Table 3 and Table 4 - indicates that the fuel cell engine does not work. When the load detection device detects that the vehicle is under heavy load, by detecting the state of charge SOC value of the power battery and the vehicle's demanded power Pave value for the fuel cell engine, look up Table 5 and Table 6 to determine the working state of the fuel cell engine (not working or working) ) and working status point; When the current state of the fuel cell engine is not working, according to Table 5, the next state or power range of the fuel cell engine is judged by the SOC value and Pave value. If the fuel cell engine still needs to be in the non-working state, the fuel cell engine continues to stop If the next state of the fuel cell engine is in the five power ranges of A, B, C, D, and E, select the power range that the fuel cell engine needs to be in according to Table 5, and select the working state point in the corresponding power range according to Table 6. When the current state of the fuel cell engine is in one of the power ranges of A, B, C, D, and E, according to Table 5, the next power range of the fuel cell engine can be judged by the SOC value and Pave value. If the power range of the fuel cell engine No change, the working state point of the fuel cell engine remains unchanged. If the power range of the fuel cell engine needs to be changed, select the working state point in the corresponding power range according to Table 6. table 5 Table 6 In Table 5 and Table 6 - indicates that the fuel cell engine does not work.