CN111216567A - Method for preventing overcharge of hydrogen energy fuel cell vehicle and energy management distribution system - Google Patents
Method for preventing overcharge of hydrogen energy fuel cell vehicle and energy management distribution system Download PDFInfo
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- CN111216567A CN111216567A CN202010187703.5A CN202010187703A CN111216567A CN 111216567 A CN111216567 A CN 111216567A CN 202010187703 A CN202010187703 A CN 202010187703A CN 111216567 A CN111216567 A CN 111216567A
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- 239000000446 fuel Substances 0.000 title claims abstract description 25
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 23
- 239000001257 hydrogen Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000002265 prevention Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 6
- 238000007726 management method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/549—Current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a method for preventing a power battery from being overcharged for a hydrogen energy fuel cell vehicle, which comprises the steps of filling a program which is formed by data codes and can run according to a certain algorithm into an integrated circuit unit capable of processing information and data, obtaining a torque value to be output to a motor according to a certain algorithm when the absolute value difference between the current of a high-voltage bus and the current chargeable current of the power battery is smaller than a certain value, and controlling the motor to output the current for charging an energy storage battery according to the torque value. And an overcharge prevention unit for running a program using the method is provided. The invention can effectively solve the problem of overcharge of the power battery caused by slow dynamic response of the hydrogen fuel battery, and prolong the service life of the power battery; meanwhile, the energy consumption of the whole vehicle can be effectively reduced, and the driving stability of the whole vehicle can be improved.
Description
Technical Field
The invention relates to an energy management method and system of a new energy vehicle, in particular to an overcharge prevention method and an energy management distribution system for a hydrogen energy fuel cell vehicle.
Background
In a hydrogen fuel cell automobile, the hydrogen fuel cell and the high-voltage power battery provide electric energy for the running of the whole automobile together, in order to reduce the energy consumption of the whole automobile, when the automobile brakes (brake energy recovery) or slides (sliding energy recovery), a VCU (vehicle control unit) can control a motor to enter an energy recovery mode (at the moment, the motor is equivalent to a generator), and the motor generates electric energy to charge the power battery, so that the aim of energy recovery is fulfilled. The power battery can be charged with a certain amount of power under certain SOC, temperature and other conditions due to the limitation of physicochemical characteristics. When the hydrogen fuel cell works, because the dynamic response is slow (the output power cannot be reduced to the minimum in a short time), if the energy recovery power of the motor is not limited, the charging of the power battery is easy to overflow, and the state can cause the fault reporting of the power battery and even directly cut off the high voltage and simultaneously affect the service life of the power battery. If the limit on the recovered energy power of the motor is too large, a large amount of energy is dissipated as heat, and the energy consumption of the whole vehicle is high.
Disclosure of Invention
The invention aims to provide a method for preventing overcharge to an energy storage battery for a hydrogen energy fuel cell vehicle and an energy management distribution system, so as to prevent overcharge to a power battery due to excessive current when the vehicle is in an energy recovery stage. The invention is realized by the following scheme.
A method for preventing the overcharge of power battery for hydrogen-energy fuel battery car features that a program consisting of data codes and running according to a certain algorithm is filled in an IC unit for processing information and data,
when a vehicle enters a braking or/and sliding stage, receiving a real-time target torque value Tq of a motor, a high-voltage bus current value I of a power battery and a current chargeable current value Imax of the power battery;
(II) calculating a torque value T to be output to the motor according to the formula 1,
T＝Tq*Coff……………………..(1)
coff in the formula 1 is a torque coefficient, and the value rule of the coefficient is as follows: when Imax-I is more than or equal to 5, Coff is 1; when 0< Imax-I <5, Coff ═ (Imax-I)/5; when Imax-I is less than or equal to 0, Coff is 0;
and (III) the whole vehicle control unit sends the torque value T which is obtained in the step II and is to be output to the motor to a motor control unit as a motor torque request value, and the motor control unit controls the motor to execute output torque.
In order to better prevent the shaking generated to the motor torque, the formula 1 in the step (ii) is further optimized to be formula 2, namely the torque value T to be output to the motor is calculated according to the formula 2,
T＝Tq*Coff*k……………………..(2)
in the formula 2, k is a torque line slope filter coefficient, the torque can be smoothed, and the torque line slope filter coefficient needs to be calibrated in a vehicle debugging stage in order to obtain a better torque smoothing effect and a better response speed. k ranges from 0 to 1；Coff is a torque coefficient, and the value rule of the coefficient is as follows: when Imax-I is more than or equal to 5, Coff is 1; when 0 is present<Imax-I<When 5, Coff is (Imax-I)/5; when Imax-I is less than or equal to 0, Coff is 0.
An energy management and distribution system for a hydrogen energy fuel cell vehicle comprises a vehicle control unit, a hydrogen energy fuel cell, a power cell, a motor controller and a motor, wherein the vehicle control unit is respectively connected with the hydrogen energy fuel cell, the power cell and the motor controller, the motor controller is connected with the motor, the units, the connection and the control method can adopt the corresponding technology of the existing hydrogen energy fuel cell vehicle, and an integrated circuit unit which is filled with a program operated according to the method is only added between the motor controller and the vehicle control unit and is called an overcharge prevention unit.
Compared with the prior art, the invention has the following advantages:
1. the method and the corresponding over-charge prevention unit are added, so that the problem of over-charge of the power battery caused by slow dynamic response of the hydrogen fuel battery can be effectively solved, and the over-charge state can cause failure of the power battery and even directly cut off high voltage and influence the service life of the power battery.
2. When the power battery is prevented from being overcharged, the method and the added overcharge prevention unit can avoid the problem that a large amount of energy is dissipated as heat due to too large limitation on the recovered energy power of the motor, can effectively reduce the energy consumption of the whole vehicle, and can improve the driving stability of the whole vehicle.
Detailed Description
Example 1
A bus vehicle with hydrogen energy fuel cell, 8.5 meters long, 30kW of power of a matched hydrogen energy fuel cell stack, 42.6kW of capacity of a power battery pack and a motor with the rated power of 90 kW/135 kW is adopted. The program running method comprises the following steps:
when a vehicle enters a braking or/and coasting stage, receiving a real-time target torque value Tq of a motor, a high-voltage bus current value I of a power battery, namely 210A, and a current chargeable current value Imax of the power battery, namely 213A;
(II) calculating a torque value T to be output to the motor according to the formula 1,
T＝Tq*Coff……………………..(1)
coff in the formula 1 is a torque coefficient, and the value rule of the coefficient is as follows: when Imax-I is more than or equal to 5, Coff is 1; when 0< Imax-I <5, Coff ═ (Imax-I)/5; when Imax-I is less than or equal to 0, Coff is 0;
and (III) the whole vehicle control unit sends the torque value T which is obtained in the step II and is to be output to the motor to a motor control unit as a motor torque request value, and the motor control unit controls the motor to execute output torque.
Example 2
Basically as in example 1, but in order to better prevent the torque of the motor from being jittered, equation 1 in step (ii) of example 1 is further optimized to equation 2, i.e. the torque value T to be output to the motor is calculated according to equation 2,
T＝Tq*Coff*k……………………..(2)
in formula 2, k is a torque line slope filter coefficient and is set to be 0.95 according to the vehicle debugging standard；Coff is a torque coefficient, and the value rule of the coefficient is as follows: when in useWhen Imax-I is more than or equal to 5, Coff is 1; when 0 is present<Imax-I<When 5, Coff is (Imax-I)/5; when Imax-I is less than or equal to 0, Coff is 0.
Example 3
A bus vehicle with 12 meters long, 50kW of power of a matched hydrogen energy fuel pile, 26.5kW of capacity of a power battery pack and a motor with 100kW of rated power/200 kW of peak power comprises a vehicle control unit, a hydrogen energy fuel cell, a power cell, a motor controller and a motor, wherein the vehicle control unit is respectively connected with the hydrogen energy fuel cell, the power cell and the motor controller, the motor controller is connected with the motor, the control method and the connection method of each unit are the same as those of the prior vehicle type technology, and a program operated according to the following method is only additionally filled between the motor controller and the vehicle control unit and is called an anti-overcharging unit integrated circuit unit. The program running method comprises the following steps:
when a vehicle enters a braking or/and coasting stage, receiving a real-time target torque value Tq of a motor, a high-voltage bus current value I of a power battery as 350A and a current chargeable current value Imax of the power battery as 355A;
(II) calculating a torque value T to be output to the motor according to the formula 1,
T＝Tq*Coff*k……………………..(2)
in equation 2, k is the torque line slope filter coefficient and is set to 0.88 according to the vehicle regulation；Coff is a torque coefficient, and the value rule of the coefficient is as follows: when Imax-I is more than or equal to 5, Coff is 1; when 0 is present<Imax-I<When 5, Coff is (Imax-I)/5; when Imax-I is less than or equal to 0, Coff is 0.
And (III) the whole vehicle control unit sends the torque value T which is obtained in the step II and is to be output to the motor to a motor control unit as a motor torque request value, and the motor control unit controls the motor to execute output torque.
Claims (3)
1. A method for preventing overcharge to a power cell for a hydrogen fuel cell vehicle, characterized by: a program made up of data codes is injected into an integrated circuit unit capable of information and data processing, said certain method including the steps of,
when a vehicle enters a braking or/and sliding stage, receiving a real-time target torque value Tq of a motor, a high-voltage bus current value I of a power battery and a current chargeable current value Imax of the power battery;
(II) calculating a torque value T to be output to the motor according to the formula 1,
T＝Tq*Coff……………………..(1)
coff in the formula 1 is a torque coefficient, and the value rule of the coefficient is as follows: when Imax-I is more than or equal to 5, Coff is 1; when 0< Imax-I <5, Coff ═ (Imax-I)/5; when Imax-I is less than or equal to 0, Coff is 0;
and (III) the whole vehicle control unit sends the torque value T which is obtained in the step II and is to be output to the motor to a motor control unit as a motor torque request value, and the motor control unit controls the motor to execute output torque.
2. The method of claim 1 for preventing overcharging a power cell for a hydrogen-energy fuel cell vehicle, wherein: step (II) calculates the torque value T to be output to the motor according to the formula 2,
T＝Tq*Coff*k……………………..(2)
in the formula 2, k is a torque slope filter coefficient, and the value range of k is 0-1；Coff is a torque coefficient, and the value rule of the coefficient is as follows: when Imax-I is more than or equal to 5, Coff is 1; when 0 is present<Imax-I<When 5, Coff is (Imax-I)/5; when Imax-I is less than or equal to 0, Coff is 0.
3. The utility model provides an energy management distribution system for hydrogen energy fuel cell car, includes vehicle control unit, hydrogen energy fuel cell, power battery, machine controller, motor, and vehicle control unit links to each other with hydrogen energy fuel cell, power battery, machine controller respectively, and machine controller links to each other its characterized in that with the motor: adding an integrated circuit unit between a motor controller and a vehicle control unit, which is injected with a program operated by the method according to claim 1 or 2.
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Citations (5)
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| CN1638987A (en) * | 2002-02-28 | 2005-07-13 | 艾热戴奈米克斯公司 | Methods of supplying energy to an energy bus in a hybrid electric vehicle, and apparatuses, media and signals for the same |
| CN104827922A (en) * | 2014-12-19 | 2015-08-12 | 北汽福田汽车股份有限公司 | Fuel cell vehicle, control method and control system thereof |
| CN109334476A (en) * | 2018-09-29 | 2019-02-15 | 潍柴动力股份有限公司 | A novel fuel cell vehicle control system and control method |
| CN110182071A (en) * | 2019-05-10 | 2019-08-30 | 中国第一汽车股份有限公司 | A kind of power follower type fuel cell vehicle energy management control method |
| CN110614925A (en) * | 2019-09-30 | 2019-12-27 | 潍柴动力股份有限公司 | Charge control method, device and equipment for fuel cell vehicle and readable storage medium |
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- 2020-03-17 CN CN202010187703.5A patent/CN111216567B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1638987A (en) * | 2002-02-28 | 2005-07-13 | 艾热戴奈米克斯公司 | Methods of supplying energy to an energy bus in a hybrid electric vehicle, and apparatuses, media and signals for the same |
| CN104827922A (en) * | 2014-12-19 | 2015-08-12 | 北汽福田汽车股份有限公司 | Fuel cell vehicle, control method and control system thereof |
| CN109334476A (en) * | 2018-09-29 | 2019-02-15 | 潍柴动力股份有限公司 | A novel fuel cell vehicle control system and control method |
| CN110182071A (en) * | 2019-05-10 | 2019-08-30 | 中国第一汽车股份有限公司 | A kind of power follower type fuel cell vehicle energy management control method |
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Application publication date: 20200602 Assignee: Guangdong Yaoda Financial Leasing Co.,Ltd. Assignor: Foshan Feichi Automobile Technology Co.,Ltd. Contract record no.: X2022980007638 Denomination of invention: Method for preventing overcharge of hydrogen fuel cell vehicle and energy management and distribution system Granted publication date: 20211001 License type: Exclusive License Record date: 20220616 |
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Denomination of invention: Method for preventing overcharge of hydrogen fuel cell vehicle and energy management and distribution system Effective date of registration: 20220617 Granted publication date: 20211001 Pledgee: Guangdong Yaoda Financial Leasing Co.,Ltd. Pledgor: Foshan Feichi Automobile Technology Co.,Ltd. Registration number: Y2022980008077 |
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