CN118810556A - Battery control system and vehicle - Google Patents
Battery control system and vehicle Download PDFInfo
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- CN118810556A CN118810556A CN202310435697.4A CN202310435697A CN118810556A CN 118810556 A CN118810556 A CN 118810556A CN 202310435697 A CN202310435697 A CN 202310435697A CN 118810556 A CN118810556 A CN 118810556A
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- Prior art keywords
- battery pack
- charge
- inverter
- electric drive
- drive circuit
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/25—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by controlling the electric load
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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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
- 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
- B60L2240/545—Temperature
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
本公开涉及一种电池控制系统及车辆，包括：动力电池包，动力电池包包括串联的第一电池组和第二电池组；多个电驱电路以及与每一电驱电路一一对应的充放电口；每一电驱电路的第一端均与动力电池包连接，每一电驱电路的第二端均连接在第一电池组和第二电池组之间，且每一电驱电路的第二端均与充放电口连接；动力电池包、多个电驱电路和多个充放电口能够组成多充电枪的升压充电回路；动力电池包和多个电驱电路能够组成大功率自加热回路。升压充电回路使得通过充放电口输入的电能对动力电池包进行升压充电，自加热回路使得第一电池组和第二电池组之间能够交替充放电，以加热动力电池包，进而实现动力电池包的升压充电和动力电池包自加热的功能协同。
The present disclosure relates to a battery control system and a vehicle, including: a power battery pack, the power battery pack including a first battery group and a second battery group connected in series; a plurality of electric drive circuits and a charge and discharge port corresponding to each electric drive circuit; the first end of each electric drive circuit is connected to the power battery pack, the second end of each electric drive circuit is connected between the first battery group and the second battery group, and the second end of each electric drive circuit is connected to the charge and discharge port; the power battery pack, the plurality of electric drive circuits and the plurality of charge and discharge ports can form a boost charging circuit of multiple charging guns; the power battery pack and the plurality of electric drive circuits can form a high-power self-heating circuit. The boost charging circuit enables the power battery pack to be boosted and charged by the electric energy input through the charge and discharge port, and the self-heating circuit enables the first battery group and the second battery group to be alternately charged and discharged to heat the power battery pack, thereby realizing the coordination of the boost charging of the power battery pack and the self-heating of the power battery pack.
Description
Technical Field
The disclosure relates to the technical field of vehicle control, in particular to a battery control system and a vehicle.
Background
The lithium ion battery is sensitive to low temperature, the internal resistance of the lithium ion battery is rapidly increased at low temperature, the discharge capacity and the charge and discharge performance are greatly limited, the power performance of the electric automobile is insufficient in low temperature environment, and the driving mileage is greatly shortened.
Aiming at the charge and discharge requirements and the self-heating requirements of a vehicle power battery pack, the power battery is usually charged or self-heated by adopting a single-phase winding of a motor on the vehicle in the related art, but as the number of motors on the vehicle increases, the related art does not consider how to more reasonably use a plurality of motors to realize the coordination of the charge and self-heating of the power battery.
Disclosure of Invention
An object of the present disclosure is to provide a battery control system and a vehicle to solve the problems in the related art.
To achieve the above object, a first aspect of the embodiments of the present disclosure provides a battery control system, including:
the power battery pack comprises a first battery pack and a second battery pack which are connected in series;
a plurality of electric drive circuits and charge and discharge ports corresponding to the electric drive circuits one by one;
the first end of each electric drive circuit is connected with the power battery pack, the second end of each electric drive circuit is connected between the first battery pack and the second battery pack, and the second end of each electric drive circuit is connected with the charging and discharging port;
The power battery pack, the electric drive circuits and the charge and discharge ports can form a boosting charging loop of the multi-charging gun;
The power battery pack and the electric drive circuits can form a high-power self-heating loop.
Optionally, each of the electric driving circuits includes:
The first bus end of the inverter is connected with the positive electrode of the first battery pack, and the second bus end of the inverter is connected between the negative electrode of the second battery pack and the negative electrode of the charging and discharging port;
The winding of the motor comprises a plurality of opposite poles, each opposite pole comprises three coil branches, first ends of coil branches of the same phase in the three coil branches of the plurality of opposite poles are connected in a common mode and are connected with bridge arm midpoints of the inverter in a one-to-one correspondence mode, second ends of the three coil branches of each opposite pole are connected in a common mode to form a neutral point, part or all of the neutral points of the winding of the motor are connected in a common mode and lead out a first N line, the first N line is connected with a positive electrode of the charging and discharging port, and the first N line is connected between the first battery pack and the second battery pack.
Optionally, each of the electric driving circuits includes:
The first bus end of the inverter is connected with the positive electrode of the first battery pack, and the second bus end of the inverter is connected between the negative electrode of the second battery pack and the negative electrode of the charging and discharging port;
the winding of the motor comprises a plurality of counter poles, each counter pole comprises three coil branches, first ends of coil branches of the same phase in the three coil branches of the plurality of counter poles are connected in a common mode and are connected with bridge arm midpoints of the inverter in a one-to-one correspondence mode, second ends of the three coil branches of each counter pole are connected in a common mode to form a neutral point, part of the neutral points of the winding of the motor are connected in a common mode and lead out a second N line, the second N line is connected with a positive electrode of the charging and discharging port, the other part of the neutral points of the winding of the motor are connected in a common mode and lead out a third N line, and the third N line is connected between the first battery pack and the second battery pack.
Optionally, the battery control system further comprises:
An inductance;
The first bus ends of the inverters in the two electric drive circuits are connected through the inductor.
Optionally, the battery control system further comprises:
A charge-discharge on-off switching unit configured to: the boost charging loop is turned on or off;
a self-heating on-off switch unit configured to: so that the high-power self-heating loop is turned on or off.
Optionally, the battery control system further comprises:
The controller is respectively connected with the inverter, the charge-discharge on-off switch unit and the self-heating on-off switch unit in each electric drive circuit;
The controller is configured to: and controlling the inverter, the charge-discharge on-off switch unit and the self-heating on-off switch unit in each electric drive circuit so that at least one of the charge/discharge function, the self-heating function and the driving function is realized.
Optionally, the plurality of electric driving circuits include a first electric driving circuit and a second electric driving circuit, the charge-discharge port includes a first charge-discharge port corresponding to the first electric driving circuit and a second charge-discharge port corresponding to the second electric driving circuit, the power battery pack, the first electric driving circuit, the first charge-discharge port can form a first boost charging circuit, the power battery pack, the second electric driving circuit, the second charge-discharge port can form a second boost charging circuit, the charge-discharge on-off switching unit includes a first charge-discharge on-off switching unit and a second charge-discharge on-off switching unit, and the first charge-discharge on-off switching unit is configured to: making the first boost charging loop on or off; the second charge-discharge on-off switch unit is configured to: the second boost charging loop is turned on or off.
Optionally, the controller is configured to:
When the power battery pack is in the first state, the inverter in the first electric drive circuit, the inverter in the second electric drive circuit and the self-heating on-off switch unit are controlled, so that the first battery pack and the second battery pack are alternately charged and discharged to heat the power battery pack.
Optionally, the controller is configured to:
When the power battery pack is in the second state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit to enable electric energy output by the power battery pack to be output to the first charge-discharge port so as to supply power for a first load; and controlling an inverter and the self-heating on-off switch unit in the second electric drive circuit to alternately charge and discharge the first battery pack and the second battery pack so as to heat the power battery pack.
Optionally, the controller is configured to:
When the power battery pack is in a third state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit to enable electric energy input through the first charge-discharge port to be output to the power battery pack so as to charge the power battery pack; and controlling an inverter and the self-heating on-off switch unit in the second electric drive circuit to alternately charge and discharge the first battery pack and the second battery pack so as to heat the power battery pack.
Optionally, the controller is configured to:
When the power battery pack is in a fourth state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit to enable electric energy output by the power battery pack to be output to the first charge-discharge port so as to supply power for a first load; and controlling an inverter in the second electric drive circuit and the second charge-discharge on-off switch unit to enable the electric energy output by the power battery pack to be output to the second charge-discharge port so as to supply power for a second load.
Optionally, the controller is configured to:
When in a fifth state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit so that electric energy input through the first charge-discharge port is output to the power battery pack to charge the power battery pack; and controlling an inverter in the second electric drive circuit and the second charge-discharge on-off switch unit, so that the electric energy input through the second charge-discharge port is output to the power battery pack to charge the power battery pack.
Optionally, the controller is configured to:
When in a sixth state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit so that electric energy input through the first charge-discharge port is output to the power battery pack to charge the power battery pack; and the inverter in the second electric drive circuit and the second charge-discharge on-off switch unit are controlled, and the electric energy output by the power battery pack is output to the second charge-discharge port to supply power for the second load.
Optionally, the controller is configured to:
The electric energy of the power battery pack is output to the motor in the first electric drive circuit to drive the vehicle by controlling the inverter in the first electric drive circuit, and/or the electric energy of the power battery pack is output to the motor in the second electric drive circuit to drive the vehicle by controlling the inverter in the second electric drive circuit.
Optionally, the controller is configured to:
The phase between the bridge arm group of the inverter of the first electric drive circuit and the bridge arm group of the inverter of the second electric drive circuit is controlled to be the same, the phase of any two-phase bridge arm in the bridge arm group of the inverter of the first electric drive circuit is controlled to be staggered, and the phase of any two-phase bridge arm in the bridge arm group of the inverter of the second electric drive circuit is controlled to be staggered.
Optionally, the controller is configured to:
And controlling the phase stagger between the bridge arm groups of the inverter of the first electric drive circuit and the bridge arm groups of the inverter of the second electric drive circuit, controlling the phases of all bridge arms in the bridge arm groups of the inverter of the first electric drive circuit to be the same, and controlling the phases of all bridge arms in the bridge arm groups of the inverter of the second electric drive circuit to be the same.
Optionally, the controller is configured to:
controlling a phase shift between a leg group of an inverter of the first electric drive circuit and a leg group of an inverter of the second electric drive circuit, and controlling the first electric drive circuit
The phases of any two-phase bridge arms in the bridge arm groups of the inverter of the driving circuit are staggered, and the phases of any two-phase bridge arms in the bridge arm groups of the inverter of the second electric driving circuit are controlled to be staggered.
According to a second aspect of embodiments of the present disclosure, there is provided a vehicle comprising the battery control system of any one of the first aspects of the present disclosure.
Through above-mentioned technical scheme, battery control system includes: the power battery pack comprises a first battery pack and a second battery pack which are connected in series; a plurality of electric drive circuits and charge and discharge ports corresponding to each electric drive circuit one by one; the first end of each electric drive circuit is connected with the power battery pack, the second end of each electric drive circuit is connected between the first battery pack and the second battery pack, and the second end of each electric drive circuit is connected with the charging and discharging port; the power battery pack, the plurality of electric drive circuits and the plurality of charging and discharging ports can form a boosting charging loop of the multi-charging gun, so that the power battery pack is boosted and charged by electric energy input through the charging and discharging ports; the power battery pack and the plurality of electric drive circuits can form a high-power self-heating loop, so that the first battery pack and the second battery pack can be alternately charged and discharged to heat the power battery pack, and then the boost charging function of the power battery pack and the self-heating function of the power battery pack are cooperated.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
fig. 1 is a circuit diagram of a battery control system according to an exemplary embodiment.
Fig. 2 is a circuit diagram of another battery control system shown according to an exemplary embodiment.
Fig. 3 is a circuit diagram of another battery control system shown according to an exemplary embodiment.
Fig. 4 is a circuit diagram of another battery control system shown according to an exemplary embodiment.
Fig. 5 is a circuit diagram of another battery control system shown according to an exemplary embodiment.
Fig. 6 is a circuit diagram of another battery control system shown according to an exemplary embodiment.
Fig. 7 is a circuit diagram of another battery control system according to an exemplary embodiment.
Fig. 8 is a circuit diagram of another battery control system according to an exemplary embodiment.
Fig. 9 is a circuit diagram of another battery control system according to an exemplary embodiment.
Fig. 10 is a circuit diagram of another battery control system according to an exemplary embodiment.
Fig. 11 is a circuit diagram of another battery control system according to an exemplary embodiment.
Fig. 12 is a circuit diagram of another battery control system according to an exemplary embodiment.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
Along with more and more motors on a vehicle, aiming at the charge and discharge requirements and the self-heating requirements of a vehicle power battery pack, in the related technology, a single-phase winding of the motor on the vehicle is generally adopted to charge or self-heat the power battery, so that reasonable utilization of a plurality of motors cannot be achieved, and the coordination of boosting charge and self-heating of the power battery pack cannot be realized.
In order to solve the above technical problems, a battery control system includes: the power battery pack 10, the power battery pack 10 includes a first battery pack E1 and a second battery pack E2 connected in series; a plurality of electric drive circuits and charge and discharge ports corresponding to each electric drive circuit one by one; the first end of each electric drive circuit is connected with the power battery pack 10, the second end of each electric drive circuit is connected between the first battery pack E1 and the second battery pack E2, and the second end of each electric drive circuit is connected with the charging and discharging port; the power battery pack 10, the plurality of electric drive circuits and the plurality of charging and discharging ports can form a boosting charging loop of the multi-charging gun, so that the power battery pack 10 is boosted and charged by electric energy input through the charging and discharging ports; the power battery pack 10 and the plurality of electric drive circuits can form a high-power self-heating loop, so that the first battery pack E1 and the second battery pack E2 can be alternately charged and discharged to heat the power battery pack 10, and then the boost charging function of the power battery pack 10 and the self-heating function of the power battery pack 10 are cooperated.
Fig. 1 is a circuit diagram of a battery control system according to an exemplary embodiment, as shown in fig. 1, including:
the power battery pack 10, the power battery pack 10 includes a first battery pack E1 and a second battery pack E2 connected in series.
The power battery pack 10 includes a first battery pack E1 and a second battery pack E2 connected in series, wherein each battery pack may be composed of a plurality of battery cells (or battery segments) connected in series, the number of battery cells included in the first battery pack E1 and the second battery pack E2 may be the same, and the number of battery cells included in the power battery pack 10 may be an even number.
And the charge and discharge ports are in one-to-one correspondence with the electric driving circuits.
The battery control system includes a plurality of electric driving circuits, and the number of the electric driving circuits may be 2,3, or more, which is not limited herein. The charge and discharge port is used for inputting or outputting electric power, and for example, the charge and discharge port may be connected to a discharge gun or other load to supply power to the other load, and the charge and discharge port may also be connected to a charge gun or charging device to receive electric power to charge the power battery pack 10, and the charging device may be a wireless charging device or a photovoltaic charging device. Each electric drive circuit is correspondingly connected with one charging and discharging port, and the number of the charging and discharging ports can be the same as that of the electric drive circuits.
The first end of each electric drive circuit is connected with the power battery pack 10, the second end of each electric drive circuit is connected between the first battery pack E1 and the second battery pack E2, and the second end of each electric drive circuit is connected with the charging and discharging port.
For each electric drive circuit, a first end of the electric drive circuit is connected with the power battery pack 10, a second end of the electric drive circuit is connected between the first battery pack E1 and the second battery pack E2, and the second end is also connected with the charge and discharge port. The second ends of the plurality of electric driving circuits can be in parallel connection, for example, the second end of each electric driving circuit is connected with a switch, the electric driving circuits are in one-to-one correspondence with the switches, the plurality of switches are connected between the first battery pack E1 and the second battery pack E2 after being connected in parallel, and the second end of the electric driving circuit is connected between the first battery pack E1 and the second battery pack E2. The power battery pack 10, the plurality of electric driving circuits and the plurality of charging/discharging ports can form a boosting charging circuit of the multi-charging gun.
The power battery pack 10, an electric drive circuit and a charge-discharge port connected with the electric drive circuit can form a boosting charge loop of the electric gun; the power battery pack 10, the plurality of electric drive circuits, and the charge/discharge ports connected to the plurality of electric drive circuits can constitute a multi-gun boosting charge circuit.
The power cell pack 10 and the plurality of electric drive circuits can form a high-power self-heating circuit.
The power battery pack 10 and one electric drive circuit can form a self-heating loop, and the power battery pack 10 and a plurality of electric drive circuits can form a plurality of self-heating loops, and if the self-heating loops are simultaneously opened, the self-heating loops are high-power self-heating loops.
Based on the connection structure of the battery control system, the battery control system includes: the power battery pack 10, the power battery pack 10 includes a first battery pack E1 and a second battery pack E2 connected in series; a plurality of electric drive circuits and charge and discharge ports corresponding to each electric drive circuit one by one; the first end of each electric drive circuit is connected with the power battery pack 10, the second end of each electric drive circuit is connected between the first battery pack E1 and the second battery pack E2, and the second end of each electric drive circuit is connected with the charging and discharging port; the power battery pack 10, the plurality of electric drive circuits and the plurality of charging and discharging ports can form a boosting charging loop of the multi-charging gun, so that the power battery pack 10 is boosted and charged by electric energy input through the charging and discharging ports; the power battery pack 10 and the plurality of electric drive circuits can form a high-power self-heating loop, so that the first battery pack E1 and the second battery pack E2 can be alternately charged and discharged to heat the power battery pack 10, the boost charging function of the power battery pack 10 and the self-heating function of the power battery pack 10 are further realized, and when the plurality of self-heating loops are simultaneously started, high-power self-heating can be further performed.
In one possible implementation, each of the electrical driving circuits includes:
And the first bus end of the inverter is connected with the positive electrode of the first battery pack E1, and the second bus end of the inverter is connected between the negative electrode of the second battery pack E2 and the negative electrode of the charge and discharge port.
The inverter comprises a plurality of parallel bridge arms, wherein first ends of the parallel bridge arms are commonly connected to form a first bus end, and second ends of the parallel bridge arms are commonly connected to form a second bus end. The first confluence end of the inverter is connected with the positive electrode of the first battery pack E1, the second confluence end of the inverter is connected with the negative electrode of the second battery pack E2, and the second confluence end is connected with the negative electrode of the charging and discharging port.
The motor comprises a plurality of opposite poles, each opposite pole comprises three coil branches, first ends of coil branches of the same phase in the three coil branches of the plurality of opposite poles are connected in a common mode and are connected with bridge arm midpoints of an inverter in a one-to-one correspondence mode, second ends of the three coil branches of each opposite pole are connected in a common mode to form a neutral point, part or all of the neutral points of the motor winding are connected in a common mode and lead out a first N line, the first N line is connected with the positive electrode of a charging and discharging port, and the first N line is connected between a first battery pack E1 and a second battery pack E2.
As shown in fig. 1, the inverter includes three legs, where VT1, VD1, VT2, and VD2 form a leg, VT3, VD3, VT4, and VD4 form a leg, VT5, VD5, VT6, and VD6 form a leg (VT 21, VD21, VT24, and VD24 form a leg, VT22, VD22, VT25, and VD25 form a leg, and VT23, VD23, VT26, and VD26 form a leg), the winding of the motor includes four pairs of poles, each pair of poles includes three coil legs, first ends of coil legs of the same phase of the three coil legs of the four pairs of poles are commonly connected to obtain ABC (a ' B ' C ') three phases, and the ABC three phases are connected in one-to-one correspondence with a leg midpoint A1B1C1 of the inverter. The second ends of the three coil branches of the four opposite poles are connected together to obtain a neutral point N1, a neutral point N2, a neutral point N3 and a neutral point N4 respectively, and part or all of the 4 neutral points, namely one or more of the 4 neutral points, are connected together to lead out a first N line, the first N line is connected with the positive electrode of the charge and discharge port, and the first N line is connected between the first battery pack E1 and the second battery pack E2.
Illustratively, the neutral point N1, the neutral point N2, the neutral point N3, and the neutral point N4 may be commonly connected, and the first N line is drawn; the neutral point N1 and the neutral point N2 can be connected together to lead out a first N line; the neutral point N2, the neutral point N3, and the neutral point N4 may be commonly connected to each other to lead out the first N line.
In this embodiment, the first ends of the multiple counter poles of the winding of the motor are connected with the middle points of the bridge arm of the inverter in a one-to-one correspondence manner, the second ends of the multiple counter poles form a neutral point, and part or all of the neutral points of the winding of the motor are commonly connected and led out of the first N line to be connected with the positive electrode of the charge-discharge port, so that the power battery pack 10, the inverter, the motor and the charge-discharge port can form a boost charging circuit, and the electric energy input by the charge-discharge port sequentially passes through the inverter and the motor to boost charge the power battery pack 10, and the electric energy of the power battery pack 10 can be output to the charge-discharge port through the boost charging circuit to supply power to a load. The first ends of a plurality of opposite poles of the winding of the motor are connected with the middle points of the bridge arm of the inverter in a one-to-one correspondence manner, the second ends of the plurality of opposite poles form a neutral point, part or all of the neutral points of the winding of the motor are connected together and led out of a first N line to be connected between the first battery pack E1 and the second battery pack E2, so that the power battery pack 10, the inverter and the motor can form a self-heating loop, the battery pack in the power battery pack 10 stores electric energy into the motor through the inverter, and then the electric energy in the motor is transmitted to the battery pack through the inverter, so that the mutual charge and discharge of the first battery pack E1 and the second battery pack E2 are realized, and the power battery pack 10 is heated.
In one possible implementation, each of the electrical driving circuits includes:
And the first bus end of the inverter is connected with the positive electrode of the first battery pack E1, and the second bus end of the inverter is connected between the negative electrode of the second battery pack E2 and the negative electrode of the charge and discharge port.
The inverter comprises a plurality of parallel bridge arms, wherein first ends of the parallel bridge arms are commonly connected to form a first bus end, and second ends of the parallel bridge arms are commonly connected to form a second bus end. The first confluence end of the inverter is connected with the positive electrode of the first battery pack E1, the second confluence end of the inverter is connected with the negative electrode of the second battery pack E2, and the second confluence end is connected with the negative electrode of the charging and discharging port.
The motor comprises a plurality of opposite poles, each opposite pole comprises three coil branches, first ends of coil branches of the same phase in the three coil branches of the plurality of opposite poles are connected in a common mode and are connected with bridge arm midpoints of an inverter in a one-to-one correspondence mode, second ends of the three coil branches of each opposite pole are connected in a common mode to form a neutral point, part of neutral points of the motor winding are connected in a common mode and lead out a second N line, the second N line is connected with a positive electrode of a charging and discharging port, the other part of neutral points of the motor winding are connected in a common mode and lead out a third N line, and the third N line is connected between a first battery pack E1 and a second battery pack E2.
As shown in fig. 1, the inverter includes three bridge arms, the winding of the motor includes four opposite poles, each opposite pole includes three coil branches, first ends of coil branches of the same phase in the three coil branches of the four opposite poles are commonly connected to obtain ABC three phases, and the ABC three phases are connected with bridge arm midpoints A1B1C1 of the inverter in a one-to-one correspondence. The second ends of the three coil branches of the four opposite poles are connected together to respectively obtain a neutral point N1, a neutral point N2, a neutral point N3 and a neutral point N4, and part (but not all) of the 4 neutral points are connected together to lead out a second N line which is connected with the positive electrode of the charge and discharge port. And the other part of the 4 neutral points is commonly connected to lead out a third N line, and the third N line is connected between the first battery group E1 and the second battery group E2. The above-described portions may be all or not all of the other portions, and the present embodiment is not limited thereto.
For example, referring to fig. 2, the neutral point N1 and the neutral point N2 may be commonly connected, a second N line (N1 and N3 in the drawing) is drawn, the neutral point N3 and the neutral point N4 are commonly connected, and a third N line (N2 and N4 in the drawing) is drawn; the second N line can be led out from the neutral point N1, the neutral point N2, the neutral point N3 and the neutral point N4 are connected together, and the third N line is led out; the neutral point N1 and the neutral point N2 may be connected together, the second N line may be led out, and the third N line may be led out from the neutral point N4.
In this embodiment, the first ends of the plurality of counter poles of the winding of the motor and the middle point of the bridge arm of the inverter, the second ends of the plurality of counter poles form a neutral point, and part of the neutral points of the winding of the motor are commonly connected and led out to be connected with the positive electrode of the charge-discharge port, so that the power battery pack 10, the inverter, the motor and the charge-discharge port can form a boost charging circuit, the electric energy input by the charge-discharge port sequentially passes through the inverter and the motor to boost charge the power battery pack 10, and the electric energy of the power battery pack 10 can be output to the charge-discharge port through the boost charging circuit so as to supply power to a load. The first ends of the plurality of counter poles of the winding of the motor and the middle point of the bridge arm of the inverter form a neutral point, the other part of the neutral point of the winding of the motor is commonly connected and led out to be connected between the first battery pack E1 and the second battery pack E2 through a third N line, so that the power battery pack 10, the inverter and the motor can form a self-heating loop, the battery pack in the power battery pack 10 stores electric energy into the motor through the inverter, and then the electric energy in the motor is transmitted to the battery pack through the inverter, so that the mutual charge and discharge of the first battery pack E1 and the second battery pack E2 are realized, and the power battery pack 10 is heated.
In one possible embodiment, the battery control system further includes:
an inductance L;
The first bus ends of the inverters in the two electric drive circuits are connected through an inductor L.
The two electric driving circuits are a first electric driving circuit 31 and a second electric driving circuit 32, respectively, wherein a first bus end of an inverter of the first electric driving circuit 31 is connected with the positive electrode of the first battery E1, a first bus end of an inverter of the second electric driving circuit 32 is connected with the positive electrode of the first battery E1, and a first bus end of an inverter of the first electric driving circuit 31 and a first bus end of an inverter of the second electric driving circuit 32 are connected through an inductor L.
The first converging ends of the inverters of the two electric drive circuits are connected through the inductor L, so that the problem of oscillation of bus current can be solved.
In one possible embodiment, the battery control system further includes:
A charge-discharge on-off switch unit configured to: so that the boost charging loop is turned on or off. When the boost charging circuit is turned on, the power battery pack 10 may be boosted by the boost charging circuit or the power battery pack 10 may be subjected to buck discharge to supply power to the load.
The self-heating on-off switch unit is configured to: so that the high-power self-heating loop is turned on or off. In the case that the high-power self-heating circuit is turned on, the first battery E1 and the second battery E2 can be alternately charged and discharged through the self-heating circuit to heat the power battery pack 10.
In one possible embodiment, the battery control system further includes a switch assembly, which may include a charge-discharge on-off switch unit and a self-heating on-off switch unit, and the switch assembly may include a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, and a fifth switch K5, wherein the first switch K1 is disposed on a connection line between the positive electrode of the first battery E1 and the first bus terminal; the second switch K2 is arranged on a connecting circuit between the negative electrode of the second battery pack E2 and the second bus end; the third switch K3 is arranged on a connecting line between the second end of the motor and the positive electrode of the charging and discharging port; the fourth switch K4 is arranged on a connecting line between the second converging end and the negative electrode of the charging and discharging port; the fifth switch K5 is disposed on a connection line between the second end of the motor and the second battery E2.
The charging on-off switch unit may include a first switch K1, a second switch K2, a third switch K3, and a fourth switch K4, and the self-heating on-off switch unit may include a first switch K1, a second switch K2, and a fifth switch K5.
In one possible embodiment, the battery control system further includes:
The controller can be an MCU (Microcontroller Unit, micro control unit) controller which is respectively connected with the inverter, the charge-discharge on-off switch unit and the self-heating on-off switch unit in each electric drive circuit.
The controller is configured to: the inverter, the charge-discharge on-off switch unit, and the self-heating on-off switch unit in each electric drive circuit are controlled so that at least one of the charge/discharge function, the self-heating function, and the driving function is realized. That is, the controller controls the inverter, the charge/discharge on-off switch unit, and the self-heating on-off switch unit, thereby realizing cooperation of the charge function and the self-heating function, cooperation of the charge function and the drive function, cooperation of the charge function and the discharge function, cooperation of the charge function and the charge function, cooperation of the discharge function and the discharge function, cooperation of the self-heating function and the self-heating function, cooperation of the discharge function and the self-heating function, cooperation of the drive function and the self-heating function, and the like.
In other possible embodiments, the charging on-off switch unit may further include a sixth switch K6, where the sixth switch K6 is used to control the dc charging and discharging.
In one possible embodiment, the plurality of electric driving circuits includes a first electric driving circuit 31 and a second electric driving circuit 32, the charge and discharge port includes a first charge and discharge port corresponding to the first electric driving circuit 31 and a second charge and discharge port corresponding to the second electric driving circuit 32, the power battery pack 10, the first electric driving circuit 31, and the first charge and discharge port can constitute a first boost charging circuit, the power battery pack 10, the second electric driving circuit 32, and the second charge and discharge port can constitute a second boost charging circuit, and the charge and discharge on-off switching unit includes a first charge and discharge on-off switching unit in the first boost charging circuit and a second charge and discharge on-off switching unit in the second boost charging circuit, and the first charge and discharge on-off switching unit is configured to: the first boost charging loop is turned on or off; the second charge-discharge on-off switch unit is configured to: the second boost charging loop is turned on or off. The power battery pack 10 and the first electric drive circuit 31 can constitute a first self-heating circuit, and the power battery pack 10 and the second electric drive circuit 32 can constitute a second self-heating circuit. The self-heating on-off switch unit comprises a first self-heating on-off switch unit in the first self-heating loop and a second self-heating on-off switch unit in the second self-heating loop. The first load is connected to the first charge and discharge port, and the second load is connected to the second charge and discharge port (not shown).
The first charge and discharge on-off switching unit may include a first switch K1, a second switch K2, a third switch K3, and a fourth switch K4, and the second charge and discharge on-off switching unit may include a first switch K1, a second switch K2, a third switch K3', and a fourth switch K4'. The first self-heating on-off switching unit may include a first switch K1, a second switch K2, and a fifth switch K5, and the first self-heating on-off switching unit may include a first switch K1, a second switch K2, and a fifth switch K5'.
In one possible implementation, the controller is configured to:
When in the first state, the inverter in the first electric drive circuit 31, the inverter in the second electric drive circuit 32, and the self-heating on-off switching unit are controlled so that the first battery pack E1 and the second battery pack E2 are alternately charged and discharged to heat the power battery pack 10. The first state may be a self-heating function and a cooperative mode of the self-heating function.
The inverter in the first electric drive circuit 31 is a first inverter, the inverter in the second electric drive circuit 32 is a second inverter, the motor in the first electric drive circuit 31 is a first motor, and the motor in the second electric drive circuit 32 is a second motor.
For example, the control manner of the controller may be: the gray arrow portions in the first, second, third and fourth control stages are sequentially executed, and the black arrow portions in the fourth, third, second and first control stages are sequentially executed, thereby cycling. That is, the gray arrow portion in fig. 3, the gray arrow portion in fig. 4, the gray arrow portion in fig. 5, the gray arrow portion in fig. 6, the black arrow portion in fig. 5, the black arrow portion in fig. 4, and the black arrow portion in fig. 3 are sequentially cyclically performed to realize the cooperation of the self-heating function and the self-heating function, that is, high-power self-heating.
Referring to fig. 3, the first control stage is to control the first switch K1, the second switch K2, the fifth switch K5 in the first self-heating on-off switch unit, and the fifth switch K5' in the second self-heating on-off switch unit to be turned on, and the third switch K3, the fourth switch K4 in the first self-heating on-off switch unit, and the third switch K3', the fourth switch K4' in the second self-heating on-off switch unit to be turned off, and to control the upper bridge arm in the first inverter to be turned off, and the lower bridge arm to be turned on and the upper bridge arm in the second inverter to be turned off. The first control phase discharges the second battery E2 to charge the first motor and the second motor to charge the first battery E1.
Referring to fig. 4, the second control stage is to control the first switch K1, the second switch K2, the fifth switch K5 in the first self-heating on-off switch unit, and the fifth switch K5' in the second self-heating on-off switch unit to be closed, and the third switch K3, the fourth switch K4 in the first self-heating on-off switch unit, and the third switch K3', the fourth switch K4' in the second self-heating on-off switch unit to be opened, and to control the upper bridge arm in the first inverter to be turned on, the lower bridge arm to be turned off, and the upper bridge arm in the second inverter to be turned on. The second control stage discharges the second battery E2 to charge the second motor and the first motor to charge the first battery E1.
Referring to fig. 5, the third control stage is to control the first switch K1, the second switch K2, the fifth switch K5 in the first self-heating on-off switch unit, and the fifth switch K5' in the second self-heating on-off switch unit to be turned on, and the third switch K3, the fourth switch K4 in the first self-heating on-off switch unit, and the third switch K3', the fourth switch K4' in the second self-heating on-off switch unit to be turned off, and to control the upper bridge arm in the first inverter to be turned on, the lower bridge arm to be turned off, and the upper bridge arm in the second inverter to be turned off and the lower bridge arm to be turned on. The third control stage discharges the first battery E1 to charge the first motor and the second motor to charge the second battery E2.
Referring to fig. 6, the fourth control stage is to control the first switch K1, the second switch K2, the fifth switch K5 in the first self-heating on-off switch unit, and the fifth switch K5' in the second self-heating on-off switch unit to be turned on, and the third switch K3, the fourth switch K4 in the first self-heating on-off switch unit, and the third switch K3', the fourth switch K4' in the second self-heating on-off switch unit to be turned off, and to control the upper bridge arm in the first inverter to be turned off, and the lower bridge arm to be turned on and the upper bridge arm in the second inverter to be turned off. The fourth control phase discharges the first battery E1 to charge the second motor and the first motor discharges to charge the second battery E2.
In one possible implementation, the controller is configured to:
When in the second state, the inverter and the first charge-discharge on-off switch unit in the first electric drive circuit 31 are controlled, so that the electric energy output by the power battery pack 10 is output to the first charge-discharge port to supply power to the first load; and controls the inverter and the self-heating on-off switching unit in the second electric drive circuit 32 so that the first battery pack E1 and the second battery pack E2 are alternately charged and discharged to heat the power battery pack 10. The second state may be a cooperation of the discharging function and the self-heating function.
For example, the control manner of the controller may be: the fifth control stage, the sixth control stage, the seventh control stage and the eighth control stage are sequentially and cyclically executed to realize the cooperation of the discharging function and the self-heating function.
The fifth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5' in the second self-heating on-off switch unit to be closed, the third switch K3', the fourth switch K4' and the fifth switch K5 in the first self-heating on-off switch unit to be opened, and control the upper bridge arm in the first inverter to be turned on, the lower bridge arm to be turned off, and the upper bridge arm in the second inverter to be turned on and the lower bridge arm to be turned off. The ninth control stage is that the first battery set E1 and the second battery set E2 supply power to the first load through the first motor and the first charging and discharging port, and the first battery set E1 discharges to charge the second motor.
The sixth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5' in the second self-heating on-off switch unit to be closed, the third switch K3', the fourth switch K4' and the fifth switch K5 in the first self-heating on-off switch unit to be opened, and to control the upper bridge arm in the first inverter to be opened, the lower bridge arm to be closed, and the upper bridge arm in the second inverter to be opened and the lower bridge arm to be closed. The sixth control stage discharges the first motor and supplies power to the first load through the first charge-discharge port, and the second motor discharges to charge the second battery E2.
The seventh control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5' in the second self-heating on-off switch unit to be closed, the third switch K3', the fourth switch K4' and the fifth switch K5 in the first self-heating on-off switch unit to be opened, and control the upper bridge arm in the first inverter to be turned on, the lower bridge arm to be turned off, and the upper bridge arm in the second inverter to be turned off and the lower bridge arm to be turned on. The seventh control stage is to discharge the first battery E1 and the second battery E2 and supply power to the first load through the first motor and the first charging and discharging port, and discharge the second battery E2 to charge the second motor.
The eighth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5' in the second self-heating on-off switch unit to be closed, the third switch K3', the fourth switch K4' and the fifth switch K5 in the first self-heating on-off switch unit to be opened, and to control the upper bridge arm in the first inverter to be opened, the lower bridge arm to be opened, and the upper bridge arm to be opened and the lower bridge arm to be opened in the second inverter to be opened; the eighth control stage discharges the first motor and supplies power to the first load through the first charge-discharge port, and the second motor discharges to charge the first battery E1.
In one possible implementation, the controller is configured to:
When in the third state, the inverter and the first charge-discharge on-off switching unit in the first electric drive circuit 31 are controlled so that the electric energy input through the first charge-discharge port is output to the power battery pack 10 to charge the power battery pack 10; and controls the inverter and the self-heating on-off switching unit in the second electric drive circuit 32 so that the first battery pack E1 and the second battery pack E2 are alternately charged and discharged to heat the power battery pack 10. The third state may be a cooperation of the charging function and the self-heating function.
For example, the control manner of the controller may be: the ninth control stage, tenth control stage, eleventh control stage, and twelfth control stage are sequentially and cyclically executed to realize the cooperation of the charging function and the self-heating function.
Referring to fig. 7, the ninth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5' in the second self-heating on-off switch unit to be turned on, and the third switch K3', the fourth switch K4' and the fifth switch K5 in the first self-heating on-off switch unit to be turned off, and to control the upper bridge arm in the first inverter to be turned off, the lower bridge arm to be turned on, and the upper bridge arm to be turned on and the lower bridge arm to be turned off in the second inverter. The ninth control stage discharges the first charge-discharge port to charge the first motor, and the first battery E1 discharges to charge the second motor.
Referring to fig. 8, the tenth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5' in the second self-heating on-off switch unit to be turned on, and the third switch K3', the fourth switch K4' and the fifth switch K5 in the first self-heating on-off switch unit to be turned off, and to control the upper bridge arm in the first inverter to be turned on, the lower bridge arm to be turned off, and the upper bridge arm in the second inverter to be turned off and the lower bridge arm to be turned on. The tenth control stage discharges the first charge-discharge port and boosts the voltage by the first motor to charge the first battery E1 and the second battery E2, and discharges the second motor to charge the second battery E2.
Referring to fig. 9, the eleventh control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, and the fifth switch K5' in the second self-heating on-off switch unit to be turned on, and the third switch K3', the fourth switch K4', and the fifth switch K5 in the first self-heating on-off switch unit to be turned off, and to control the upper leg in the first inverter to be turned off, the lower leg to be turned on, and the upper leg in the second inverter to be turned off, and the lower leg to be turned on. The eleventh control stage discharges the first charge-discharge port to charge the first motor, and discharges the second battery E2 to charge the second motor.
Referring to fig. 10, the twelfth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5' in the second self-heating on-off switch unit to be turned on, and the third switch K3', the fourth switch K4' and the fifth switch K5 in the first self-heating on-off switch unit to be turned off, and to control the upper bridge arm in the first inverter to be turned on, the lower bridge arm to be turned off, and the upper bridge arm in the second inverter to be turned on and the lower bridge arm to be turned off; the twelfth control stage discharges the first charge-discharge port and boosts the voltage by the first motor to charge the first battery E1 and the second battery E2, and discharges the second motor to charge the second battery E1.
In one possible implementation, the controller is configured to:
When in the fourth state, the inverter and the first charge-discharge on-off switch unit in the first electric drive circuit 31 are controlled, so that the electric energy output by the power battery pack 10 is output to the first charge-discharge port to supply power to the first load; and controls the inverter and the second charge-discharge on-off switching unit in the second electric drive circuit 32 so that the electric energy output by the power battery pack 10 is output to the second charge-discharge port to supply power to the second load. The fourth state may be a cooperation of the discharging function and the discharging function, i.e. high power charging.
For example, the control manner of the controller may be: the thirteenth control stage and the fourteenth control stage are alternately performed to realize the discharge function and the cooperation of the discharge function.
The thirteenth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 in the first self-heating on-off switch unit and the third switch K3', the fourth switch K4' in the second self-heating on-off switch unit to be closed, the fifth switch K5 in the first self-heating on-off switch unit and the fifth switch K5' in the second self-heating on-off switch unit to be opened, and control the upper bridge arm in the first inverter to be opened, the lower bridge arm to be opened, and the upper bridge arm in the second inverter to be opened; the thirteenth control stage is to discharge the first motor and supply power to the first load through the first charge-discharge port, discharge the power battery pack 10 and supply power to the second load through the second motor and the second charge-discharge port, and in this process, the second motor stores energy.
The fourteenth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 in the first self-heating on-off switch unit and the third switch K3', the fourth switch K4' in the second self-heating on-off switch unit to be closed, the fifth switch K5 in the first self-heating on-off switch unit and the fifth switch K5' in the second self-heating on-off switch unit to be opened, and to control the upper bridge arm in the first inverter to be conducted, the lower bridge arm to be opened, and the upper bridge arm in the second inverter to be opened and the lower bridge arm to be conducted; the fourteenth control stage discharges the second motor and supplies power to the second load through the second charge-discharge port, and the power battery pack 10 discharges and supplies power to the first load through the first motor and the first charge-discharge port, in which process the first motor stores energy.
In one possible implementation, the controller is configured to:
When in the fifth state, the inverter and the first charge-discharge on-off switching unit in the first electric drive circuit 31 are controlled so that the electric energy input through the first charge-discharge port is output to the power battery pack 10 to charge the power battery pack 10; and controls the inverter and the second charge-discharge on-off switching unit in the second electric drive circuit 32 so that the electric energy input through the second charge-discharge port is output to the power battery pack 10 to charge the power battery pack 10. The fifth state may be a cooperation of the charging function and the charging function.
For example, the control manner of the controller may be: the fifteenth control stage and the sixteenth control stage are alternately performed to achieve the cooperation of the charging function and the charging function, i.e., high-power charging.
Referring to fig. 11, the fifteenth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 in the first self-heating on-off switch unit, and the third switch K3', the fourth switch K4' in the second self-heating on-off switch unit to be closed, and the fifth switch K5 in the first self-heating on-off switch unit and the fifth switch K5' in the second self-heating on-off switch unit to be opened, and to control the upper bridge arm in the first inverter to be opened, the lower bridge arm to be opened, and the upper bridge arm in the second inverter to be opened; the fifteenth control stage discharges the first charge-discharge port to charge the first motor, and the second charge-discharge port discharges and boosts the voltage through the second motor to charge the power battery pack 10, during which the second motor stores energy.
Referring to fig. 12, the sixteenth control stage is to control the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 in the first self-heating on-off switch unit, and the third switch K3' and the fourth switch K4' in the second self-heating on-off switch unit to be closed, and the fifth switch K5 in the first self-heating on-off switch unit and the fifth switch K5' in the second self-heating on-off switch unit to be opened, and to control the upper bridge arm in the first inverter to be turned on, the lower bridge arm to be turned off, and the upper bridge arm in the second inverter to be turned on; the sixteenth control stage discharges the second charge-discharge port to charge the second motor, and the first charge-discharge port discharges and boosts the voltage through the first motor to charge the power battery pack 10, during which the first motor stores energy.
In one possible implementation, the controller is configured to:
When in the sixth state, the inverter and the first charge-discharge on-off switching unit in the first electric drive circuit 31 are controlled so that the electric energy input through the first charge-discharge port is output to the power battery pack 10 to charge the power battery pack 10; and controls the inverter and the second charge-discharge on-off switching unit in the second electric drive circuit 32, and outputs the electric energy output by the power battery pack 10 to the second charge-discharge port to supply power to the second load. The sixth state may be a cooperation of the charging function and the discharging function.
For example, the control manner of the controller may be: the seventeenth control stage and the eighteenth control stage are alternately executed to realize the cooperation of the charging function and the discharging function.
The seventeenth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 in the first self-heating on-off switch unit and the third switch K3', the fourth switch K4' in the second self-heating on-off switch unit to be closed, and the fifth switch K5 in the first self-heating on-off switch unit and the fifth switch K5' in the second self-heating on-off switch unit to be opened, and control the upper bridge arm in the first inverter to be opened, the lower bridge arm to be opened, and the upper bridge arm in the second inverter to be opened; the seventeenth control stage is that the first motor discharges and supplies power to the first load through the first charge-discharge port, the second charge-discharge port discharges and boosts the voltage through the second motor to charge the power battery pack 10, and in this process, the second motor stores energy and releases, and the first motor stores energy and releases.
The eighteenth control stage is to control the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 in the first self-heating on-off switch unit, and the third switch K3', the fourth switch K4' in the second self-heating on-off switch unit to be closed, and the fifth switch K5 in the first self-heating on-off switch unit and the fifth switch K5' in the second self-heating on-off switch unit to be opened, and to control the upper bridge arm in the first inverter to be turned on, the lower bridge arm to be turned off, and the upper bridge arm in the second inverter to be turned off, and the lower bridge arm to be turned on; the eighteenth control stage is that the power battery pack 10 discharges and supplies power to the first load through the first motor and the first charge-discharge port, and the second charge-discharge port discharges to charge the second motor, and in this process, the first motor stores energy and the second motor stores energy. In one possible implementation, the controller is configured to:
The electric energy of the power battery pack 10 is output to the motor in the first electric drive circuit 31 to drive the vehicle by control of the inverter in the first electric drive circuit 31, and/or the electric energy of the power battery pack 10 is output to the motor in the second electric drive circuit 32 to drive the vehicle by control of the inverter in the second electric drive circuit 32.
The drive function may be combined with any of the above states, or may replace the self-heating function or the charging function in the above states.
To reduce ripple, the bridge arm groups within the inverter and/or between the inverter and the inverter may be asynchronously controlled. The inverter of the first electric drive circuit 31 is a first inverter, and the inverter of the second electric drive circuit 32 is a second inverter.
In one possible implementation, the controller is configured to:
The phases between the bridge arm groups of the inverter controlling the first electric drive circuit 31 and the inverter of the second electric drive circuit 32 are the same, and the phases of any two-phase bridge arms in the bridge arm groups of the inverter controlling the first electric drive circuit 31 are staggered, and the phases of any two-phase bridge arms in the bridge arm groups of the inverter controlling the second electric drive circuit 32 are staggered. The synchronous control between the bridge arm group of the first inverter and the bridge arm group of the second inverter is realized, and the asynchronous control is performed in the bridge arm group. The synchronous control is that the phases among the controlled objects are the same, and the asynchronous control is that the phases among the controlled objects are staggered.
In one possible implementation, the controller is configured to:
the phase stagger between the bridge arm group of the inverter of the first electric drive circuit 31 and the bridge arm group of the inverter of the second electric drive circuit 32 is controlled, and the phases of all the bridge arms in the bridge arm group of the inverter of the first electric drive circuit 31 are controlled to be the same, and the phases of all the bridge arms in the bridge arm group of the inverter of the second electric drive circuit 32 are controlled to be the same. The method is characterized in that asynchronous control between the bridge arm group of the first inverter and the bridge arm group of the second inverter is realized, and synchronous control is carried out in the bridge arm groups.
In one possible implementation, the controller is configured to:
the phase staggering between the bridge arm groups of the inverter of the first electric drive circuit 31 and the bridge arm groups of the inverter of the second electric drive circuit 32 is controlled, and the phase staggering of any two-phase bridge arms in the bridge arm groups of the inverter of the first electric drive circuit 31 is controlled, and the phase staggering of any two-phase bridge arms in the bridge arm groups of the inverter of the second electric drive circuit 32 is controlled. The method comprises the steps of realizing asynchronous control between a bridge arm group of a first inverter and a bridge arm group of a second inverter, and carrying out asynchronous control in the bridge arm group.
For example, a phase of the1, the2 phase of the A1B1C1 windings may be staggered for each phase, such that the ABC windings and the A2B2C2 windings are uniformly staggered for the3 angle for each motor, respectively, (the 1, the2, the3 e (0, 360)).
According to different motor designs and different working modes, a preferred working mode is selected, such as a six-phase motor, a parking working condition, a charging working condition and a driving working condition, a self-heating function is realized, or a boosting charging self-heating function or a direct-current direct-connection charging self-heating function is realized, for two sets of systems, the simultaneous working of the two sets of systems is preferably that a first motor adopts the phase control of the 1=120°, a second motor adopts the phase control of the 2=120°, and the second motor and the first motor are staggered by the 3=60°. If the first motor winding is p_1 phase and the second motor winding is p_2 phase, the electrical angle of the 1=360/p_1 degree is preferable, the electrical angle of the 2=360/p_2 degree is preferable, the electrical angle of the 3=360/(p_1+p_2) degree is ensured, the equivalent inductance L on N lines is larger in the self-heating or charging process, the ripple voltage and ripple current of a boosting charging and discharging port are minimum, the ripple current of the self-heating N lines is minimum, the ripple current of a bus capacitor is minimum, the bus capacitor selection pressure is reduced, the peak and peak of the self-heating current ripple is reduced, and the external EMC interference is reduced.
In one possible implementation, the controller may control the first inverter, the second inverter, the charge on-off switch unit, and the self-heating on-off switch unit by control instructions such that a function of at least one of the charge/discharge function, the self-heating function, and the driving function is implemented.
The control instructions may include a switch control instruction and a bridge arm control instruction, where the switch control instruction is used to control the charging on-off switch unit and the self-heating on-off switch unit, and the bridge arm control instruction is used to control the bridge arm group in the first inverter and the bridge arm group in the second inverter. The bridge arm control command can comprise the duty ratio of each phase bridge arm, and corresponding functions are realized through the control of common-mode voltage whether self-heating or boost charging or buck discharging are carried out; the driving function is to obtain the control voltage of each phase bridge arm by the addition of the common mode voltage and the differential mode voltage through the differential mode voltage control of the bridge arm, and the functions are independently controlled through the modulation output duty ratio of the bridge arm, so that the corresponding functions are realized.
The circuit topology demonstration of the double-gun charging of the double-motor system in fig. 1 is used for demonstration, a system scheme for realizing the functions of double-gun high-power charging and high-power self-heating is provided, one of the electric drive circuit systems is used as a basis for explaining how to realize the electric drive boosting charging, parking self-heating and driving self-heating technologies, and the other electric drive circuit system realizes the same technical means. The two systems can work independently or simultaneously, the self-heating function of the battery can be realized under the conditions of boosting and charging, driving and parking, and the functions realized between the two systems are distributed by the detection controller.
The first electric drive circuit system is a first boost charging loop and a first self-heating loop. The second electro-drive circuitry 32 is implemented in a manner consistent with the first electro-drive circuitry.
The control process comprises the following steps: the first electric drive circuit system receives a charge and discharge instruction and a self-heating power instruction, wherein the self-heating power instruction comprises: the battery self-heating current amplitude command, the self-heating current frequency command and the self-heating battery balance current command are calculated by the command calculation module to corresponding control target variables, and the target variables are controlled to realize corresponding functions.
① A battery self-heating function;
1. The first electric drive circuit system d-q coordinate system acquires a control target: given self-heating current amplitude ipk _x, current frequency is f_x, self-heating battery actively equalizes current indc _x, and obtains current in_x= indc _x+ ipk _x sin (2pi_x_x_t) or in_x= indc _x+ ipk _x_x_cos (2pi_f_x_t) on n_x line; the required current value in_x and the actual in_x current value (in_1= -ia1-ib1-ic 1) are closed-loop controlled by PI or PR to obtain the required duty cycle dn_x, the upper bridge arm common-mode duty cycle dp_x=1-dn_x. Dp_x where p refers to the number of motor phases per motor D-q coordinate system, x refers to the x-th motor, x=1 refers to the 1-th motor D-q coordinate system, x=2 refers to the 2-th motor D-q coordinate system, fig. 2 two three-phase motors, each motor set of windings is three-phase, where p=1, 2,3 of each set of systems, where the A1 phase common mode duty cycle d1_1, the B1 phase common mode duty cycle d2_1, the C1 phase common mode duty cycle d3_1, the A2 phase common mode duty cycle d1_2, the B2 phase common mode duty cycle d2_2, the C2 phase common mode duty cycle d3_2.
② Battery charging function
2. A charge and discharge instruction: the charge and discharge instruction is to decide whether to charge directly or charge in a boosting way according to the voltage levels of the charge pile and the battery pack.
1) Direct-connection direct-charging: when the voltage of the charging pile is higher than the voltage of the battery pack, direct-connection charging and discharging are selected, namely, the bridge arms corresponding to the three-phase windings of the first switch K1, the second switch K2, the fourth switch K4 and the sixth switch K6 in the drawing 1 are not controlled.
2) Battery boost charging function: the voltage of the charging pile of the first charging and discharging port is lower than the voltage of the battery pack to select boost charging, the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 in the drawing 1 are attracted, and the d-q coordinate system of the first motor is used for the boost charging function. The voltage of the charging pile of the second charging and discharging port is lower than the voltage of the battery pack to select boost charging, and the first switch K1, the second switch K2, the third switch K3 'and the fourth switch K4' in the drawing 1 are attracted, so that the d-q coordinate system of the second motor is used for the boost charging function.
The electro-drive circuitry may also employ single voltage upper closed loop control: and in the step of voltage closed loop, according to a command resolving module, acquiring a required charging port voltage command Unx, acquiring a required voltage value Unx and an actual Unx (Un 1 is acquired through the voltage on a sampling capacitor C12), performing closed loop control on the required voltage value Un_x (common mode voltage value) through the voltage on a sampling capacitor C22, wherein the control voltage value of each phase bridge arm is equal to the common mode voltage Un_x, modulating the control voltage value of each phase bridge arm with the bus voltage and a carrier wave to acquire a PWM (pulse width modulation) common mode duty ratio Dp_x of each phase bridge arm in each phase of an x-th set d-q coordinate system, and acquiring the required current value of each phase of the motor through the modulating action of the bridge arms. x refers to the xth motor, x=1 refers to the first motor d-q coordinate system, and x=2 refers to the second motor d-q coordinate system.
The current in1 on the N1 line is calculated through in 1= -ia1-ib1-ic1, the current in2 on the N2 line is calculated through in 2= -ia2-ib2-ic2, and the current in2 on the N1 line is used for current monitoring protection.
③ Torque control:
The first motor d-q coordinate system obtains the controlled target torque, the target id_x and iq_x meeting the torque command are found out through an MTPA & MTPV curve according to the target torque command, the motor rotating speed value and the battery bus voltage (the MTPA & MTPV curve can be calculated in advance and calibrated by a rack, the target current command id_x and iq_x are generally obtained through the voltage, the torque and the rotating speed by using a table look-up or linear fitting method), the target id_x and iq_x are obtained after the resolving process, and the current vector on the dq axis is subjected to closed-loop control according to the vector control method of the motor. Sampling p_x phase current values i1_x, i2_x, and ip_x, converting the p_x phase current values into iα_x and iβ_x on an αβ coordinate system through Clark coordinate transformation, converting the i_x and the iβ_x phase current values into a dq coordinate system through Park coordinate transformation to obtain a direct axis current id_x, obtaining an intersecting axis current iq_x, obtaining a given target value id_x of the current by making a difference with the id_x, outputting a target value ud_x through PID control, obtaining a given target value iq_x of the current by making a difference with the iq_x of the current, and outputting a target value uq_x through PID control. Ud_x and Uq_x are converted into Ualpha_x and Ubeta_x through inverse Park, ualpha_x and Ubeta_x are converted into U1_x, U2_x, and Up_x through inverse Clark, control voltage values of bridge arms of each phase are modulated with bus voltage and carrier wave, and PWM differential mode duty ratios of bridge arms of each phase in p_x are obtained, namely, DD1_x, DD2_x, and DDp _x. DDp _x where p denotes the number of motor phases per motor d-q coordinate system, x denotes the x-th motor, x=1 denotes the 1 st motor d-q coordinate system, x=2 denotes the 2 nd motor d-q coordinate system, fig. 2 two three-phase motors, each motor set of windings is three-phase, where p=1, 2,3 per set of systems, where A1 phase difference duty cycle dd1_1, B1 phase difference duty cycle dd2_1, C1 phase difference duty cycle dd3_1, A2 phase difference duty cycle dd1_2, B2 phase difference duty cycle dd2_2, C2 phase difference duty cycle dd3_2.
Introduction of functional implementation:
the self-heating and boost charging are realized by controlling the common-mode voltage; the driving function is to obtain the control voltage of each phase bridge arm by the addition of the common mode voltage and the differential mode voltage through the differential mode voltage control of the bridge arm, and the functions are independently controlled through the modulation output duty ratio of the bridge arm, so that the corresponding functions are realized.
Parking condition + dc boost charge/buck discharge: according to ②, according to the common-mode duty ratio Dp_1 of the first motor D-q coordinate system, the actual A1B1C1 three-phase bridge arm duty ratios D1_1, D2_1 and D3_1 are respectively obtained, wherein D1_1=D2_1=D3_1=Dp_1, and direct-current boost charge/buck discharge control is carried out; according to the common-mode duty ratio Dp_2 of the second motor D-q coordinate system, the actual duty ratios D1_2, D2_2 and D3_2 of the three-phase bridge arms of the A2B2C2 are respectively obtained, wherein D1_2=D2_2=D3_2=Dp_2, and direct-current boost charge/buck discharge control is carried out; the method comprises the steps of obtaining the duty ratio of three-phase bridge arms of two motors to control the current, realizing the boosting charging and discharging function of boosting charging of a first electric drive and the boosting charging and discharging function of a second motor system, and simultaneously charging and discharging the two direct current charging and discharging ports by double guns, simultaneously discharging, or charging and discharging simultaneously, or charging and discharging any charging port.
Parking condition + direct current boost charge/buck discharge + self-heating: according to ①、②, according to the common-mode duty ratio Dp_1 of the first motor d-q coordinate system, the actual three-phase bridge arm duty ratios Da1, db1 and Dc1 of the A1B1C1 are respectively obtained, wherein Da1 = Db1 = Dc1 = Dp_1, and direct-current boost charge/buck discharge control is carried out; according to a common-mode duty ratio Dp_2 of a second motor d-q coordinate system, actual A2B2C2 three-phase bridge arm duty ratios Da2, db2 and Dc2 are respectively obtained, wherein Da2 = Db2 = Dc2 = Dp_2, and self-heating control is carried out; and the current control is performed by obtaining the duty ratio of the three-phase bridge arms of the two motors, so that the boosting and charging functions of the first electric drive circuit system and the self-heating functions of the second electric drive circuit 32 system are realized. Or the self-heating function of the first electric drive circuitry and the boost charging function of the second electric drive circuitry 32 are performed according to the process ①、②, which is identical to the above, except that the windings are exchanged to perform the respective functions.
Parking working condition + direct current direct-connected charge discharge + self-heating: according to ①、②, the charging port 1 is directly connected with charging and discharging; according to the common-mode duty ratio Dp_1 of the first motor d-q coordinate system, the actual duty ratios Da1, db1 and Dc1 of the three-phase bridge arms of the A1B1C1 are respectively obtained, wherein Da1 = Db1 = Dc1 = Dp_1, and the self-heating function of the first electric drive circuit system is realized; according to the common-mode duty ratio Dp_2 of the d-q coordinate system of the second motor, the actual duty ratios Da2, db2 and Dc2 of the three-phase bridge arms of the A2B2C2 are obtained respectively; wherein Da2 = Db2 = dc2 = dp_2, the self-heating function of the second electrically driven circuit 32 system is implemented.
Parking condition + self-heating: according to the common-mode duty ratio Dp_1 of the first motor d-q coordinate system, the actual duty ratios Da1, db1 and Dc1 of the three-phase bridge arms of the A1B1C1 are respectively obtained, wherein Da1 = Db1 = Dc1 = Dp_1, and the self-heating function of the first electric drive circuit system is realized; according to the common-mode duty ratio Dp_2 of the d-q coordinate system of the second motor, the actual duty ratios Da2, db2 and Dc2 of the three-phase bridge arms of the A2B2C2 are obtained respectively; wherein Da2 = Db2 = dc2 = dp_2; the self-heating function of the second electrically driven circuit 32 system is achieved.
Driving condition + dc boost charge/buck discharge + self-heating: according to ①、②、③, adding the common-mode duty ratio Dp_1 of the first motor d-q coordinate system with the differential-mode duty ratios DD1_1, DD2_1 and DD3_1 respectively to obtain actual three-phase bridge arm duty ratios Da1, db1 and Dc1 of the A1B1C1, and performing driving+direct-current boosting charging/discharging control; according to the common-mode duty ratio Dp_2 of the second motor d-q coordinate system, adding the common-mode duty ratios D1_2, DD2_2 and DD3_2 to obtain actual three-phase bridge arm duty ratios Da2, db2 and Dc2 of the A2B2C2, and performing driving and self-heating control; the current control is carried out by obtaining the duty ratio of the three-phase bridge arms of the two motors, the driving+direct current boosting charge/buck discharge control of the first electric drive circuit system and the driving+self-heating function of the second electric drive circuit 32 system are realized, or the driving+self-heating function of the first electric drive circuit system and the driving+direct current boosting charge/buck discharge function of the second electric drive circuit 32 system are carried out according to the process of ①、②、③, the process is consistent with the above, and only the exchange windings realize the respective functions. The first electric drive circuit system and the second electric drive circuit 32 system are controlled together to realize the functions of driving working conditions, direct current boosting charge/step-down discharge and self-heating.
Driving condition + dc boost charge/buck discharge: according to ②、③, adding the common-mode duty ratio Dp_1 of the first motor d-q coordinate system with the differential-mode duty ratios DD1_1, DD2_1 and DD3_1 respectively to obtain actual three-phase bridge arm duty ratios Da1, db1 and Dc1 of the A1B1C1, and performing driving+direct-current boosting charging/discharging control; according to the common-mode duty ratio Dp_2 of the second motor d-q coordinate system, adding the common-mode duty ratios Dp_2 with differential-mode duty ratios DD1_2, DD2_2 and DD3_2 respectively to obtain actual three-phase bridge arm duty ratios Da2, db2 and Dc2 of the A2B2C2, and performing driving+direct-current boosting charging/step-down discharging control; the current control is carried out by obtaining the duty ratio of the three-phase bridge arms of the two motors, and the functions of driving, direct-current boosting charging/voltage reducing discharging control of the first electric drive circuit system and driving, direct-current boosting charging/voltage reducing discharging control of the second electric drive circuit 32 system are realized, and any charging port can be charged and discharged in the driving process.
Driving condition + self-heating: according to ①、③, adding the common-mode duty ratio Dp_1 of the first motor coordinate system with the differential-mode duty ratios DD1_1, DD2_1 and DD3_1 respectively to obtain actual three-phase bridge arm duty ratios Da1, db1 and Dc1 of the A1B1C1, and performing driving and self-heating control; according to the common-mode duty ratio Dp_2 of the first motor d-q coordinate system, adding the common-mode duty ratios D1_2, DD2_2 and DD3_2 to obtain actual three-phase bridge arm duty ratios Da2, db2 and Dc2 of the A2B2C2, and performing driving and self-heating control; and the duty ratios of the three-phase bridge arms of the two motors are obtained to control the current, so that the running and self-heating functions of the first electric drive circuit system and the second electric drive circuit 32 system are realized.
The second electric drive circuit 32 system performs the processes of realizing electric drive boost charging, parking self-heating and driving self-heating technologies, which are the same as those of the first electric drive circuit system;
the first and second electric drive circuits 32 may be combined to perform a number of combined functions, such as a charge self-heating function, a dual gun charge function, a dual system park self-heating function, a dual system drive self-heating function, and the like.
In another exemplary embodiment, a vehicle is also provided, including the battery control system provided by the embodiments of the present disclosure.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (18)
1. A battery control system, comprising:
the power battery pack comprises a first battery pack and a second battery pack which are connected in series;
a plurality of electric drive circuits and charge and discharge ports corresponding to the electric drive circuits one by one;
the first end of each electric drive circuit is connected with the power battery pack, the second end of each electric drive circuit is connected between the first battery pack and the second battery pack, and the second end of each electric drive circuit is connected with the charging and discharging port;
The power battery pack, the electric drive circuits and the charge and discharge ports can form a boosting charging loop of the multi-charging gun;
The power battery pack and the electric drive circuits can form a high-power self-heating loop.
2. The battery control system of claim 1, wherein each of the electrical drive circuits comprises:
The first bus end of the inverter is connected with the positive electrode of the first battery pack, and the second bus end of the inverter is connected between the negative electrode of the second battery pack and the negative electrode of the charging and discharging port;
The winding of the motor comprises a plurality of opposite poles, each opposite pole comprises three coil branches, first ends of coil branches of the same phase in the three coil branches of the plurality of opposite poles are connected in a common mode and are connected with bridge arm midpoints of the inverter in a one-to-one correspondence mode, second ends of the three coil branches of each opposite pole are connected in a common mode to form a neutral point, part or all of the neutral points of the winding of the motor are connected in a common mode and lead out a first N line, the first N line is connected with a positive electrode of the charging and discharging port, and the first N line is connected between the first battery pack and the second battery pack.
3. The battery control system of claim 1, wherein each of the electrical drive circuits comprises:
The first bus end of the inverter is connected with the positive electrode of the first battery pack, and the second bus end of the inverter is connected between the negative electrode of the second battery pack and the negative electrode of the charging and discharging port;
the winding of the motor comprises a plurality of counter poles, each counter pole comprises three coil branches, first ends of coil branches of the same phase in the three coil branches of the plurality of counter poles are connected in a common mode and are connected with bridge arm midpoints of the inverter in a one-to-one correspondence mode, second ends of the three coil branches of each counter pole are connected in a common mode to form a neutral point, part of the neutral points of the winding of the motor are connected in a common mode and lead out a second N line, the second N line is connected with a positive electrode of the charging and discharging port, the other part of the neutral points of the winding of the motor are connected in a common mode and lead out a third N line, and the third N line is connected between the first battery pack and the second battery pack.
4. The battery control system according to claim 2 or 3, characterized in that the battery control system further comprises:
An inductance;
The first bus ends of the inverters in the two electric drive circuits are connected through the inductor.
5. The battery control system according to claim 2 or 3, characterized in that the battery control system further comprises:
A charge-discharge on-off switching unit configured to: the boost charging loop is turned on or off;
a self-heating on-off switch unit configured to: so that the high-power self-heating loop is turned on or off.
6. The battery control system according to claim 5, characterized in that the battery control system further comprises:
The controller is respectively connected with the inverter, the charge-discharge on-off switch unit and the self-heating on-off switch unit in each electric drive circuit;
The controller is configured to: and controlling the inverter, the charge-discharge on-off switch unit and the self-heating on-off switch unit in each electric drive circuit so that at least one of the charge/discharge function, the self-heating function and the driving function is realized.
7. The battery control system of claim 6, wherein the plurality of electrical drive circuits includes a first electrical drive circuit and a second electrical drive circuit, the charge-discharge port includes a first charge-discharge port corresponding to the first electrical drive circuit and a second charge-discharge port corresponding to the second electrical drive circuit, the power battery pack, the first electrical drive circuit, the first charge-discharge port are capable of forming a first boost charge circuit, the power battery pack, the second electrical drive circuit, the second charge-discharge port are capable of forming a second boost charge circuit, the charge-discharge on-off switch unit includes a first charge-discharge on-off switch unit and a second charge-discharge on-off switch unit, the first charge-discharge on-off switch unit is configured to: making the first boost charging loop on or off; the second charge-discharge on-off switch unit is configured to: the second boost charging loop is turned on or off.
8. The battery control system of claim 7, wherein the controller is configured to:
When the power battery pack is in the first state, the inverter in the first electric drive circuit, the inverter in the second electric drive circuit and the self-heating on-off switch unit are controlled, so that the first battery pack and the second battery pack are alternately charged and discharged to heat the power battery pack.
9. The battery control system of claim 7, wherein the controller is configured to:
When the power battery pack is in the second state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit to enable electric energy output by the power battery pack to be output to the first charge-discharge port so as to supply power for a first load; and controlling an inverter and the self-heating on-off switch unit in the second electric drive circuit to alternately charge and discharge the first battery pack and the second battery pack so as to heat the power battery pack.
10. The battery control system of claim 7, wherein the controller is configured to:
When the power battery pack is in a third state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit to enable electric energy input through the first charge-discharge port to be output to the power battery pack so as to charge the power battery pack; and controlling an inverter and the self-heating on-off switch unit in the second electric drive circuit to alternately charge and discharge the first battery pack and the second battery pack so as to heat the power battery pack.
11. The battery control system of claim 7, wherein the controller is configured to:
When the power battery pack is in a fourth state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit to enable electric energy output by the power battery pack to be output to the first charge-discharge port so as to supply power for a first load; and controlling an inverter in the second electric drive circuit and the second charge-discharge on-off switch unit to enable the electric energy output by the power battery pack to be output to the second charge-discharge port so as to supply power for a second load.
12. The battery control system of claim 7, wherein the controller is configured to:
When in a fifth state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit so that electric energy input through the first charge-discharge port is output to the power battery pack to charge the power battery pack; and controlling an inverter in the second electric drive circuit and the second charge-discharge on-off switch unit, so that the electric energy input through the second charge-discharge port is output to the power battery pack to charge the power battery pack.
13. The battery control system of claim 7, wherein the controller is configured to:
When in a sixth state, controlling an inverter in the first electric drive circuit and the first charge-discharge on-off switch unit so that electric energy input through the first charge-discharge port is output to the power battery pack to charge the power battery pack; and the inverter in the second electric drive circuit and the second charge-discharge on-off switch unit are controlled, and the electric energy output by the power battery pack is output to the second charge-discharge port to supply power for the second load.
14. The battery control system of any of claims 7-13, wherein the controller is configured to:
The electric energy of the power battery pack is output to the motor in the first electric drive circuit to drive the vehicle by controlling the inverter in the first electric drive circuit, and/or the electric energy of the power battery pack is output to the motor in the second electric drive circuit to drive the vehicle by controlling the inverter in the second electric drive circuit.
15. The battery control system of claim 7, wherein the controller is configured to:
The phase between the bridge arm group of the inverter of the first electric drive circuit and the bridge arm group of the inverter of the second electric drive circuit is controlled to be the same, the phase of any two-phase bridge arm in the bridge arm group of the inverter of the first electric drive circuit is controlled to be staggered, and the phase of any two-phase bridge arm in the bridge arm group of the inverter of the second electric drive circuit is controlled to be staggered.
16. The battery control system of claim 7, wherein the controller is configured to:
And controlling the phase stagger between the bridge arm groups of the inverter of the first electric drive circuit and the bridge arm groups of the inverter of the second electric drive circuit, controlling the phases of all bridge arms in the bridge arm groups of the inverter of the first electric drive circuit to be the same, and controlling the phases of all bridge arms in the bridge arm groups of the inverter of the second electric drive circuit to be the same.
17. The battery control system of claim 7, wherein the controller is configured to:
The phase staggering between the bridge arm groups of the inverter of the first electric drive circuit and the bridge arm groups of the inverter of the second electric drive circuit is controlled, the phase staggering of any two-phase bridge arms in the bridge arm groups of the inverter of the first electric drive circuit is controlled, and the phase staggering of any two-phase bridge arms in the bridge arm groups of the inverter of the second electric drive circuit is controlled.
18. A vehicle comprising the battery control system of any one of claims 1-17.
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