CN-118810541-B - Battery control system and vehicle

Abstract

The invention relates to a battery control system and a vehicle, wherein the battery control system comprises a power battery pack, a plurality of electric driving circuits and charging and discharging ports corresponding to the electric driving circuits one by one, the first end of each electric driving circuit is connected with the power battery pack, the second end of each electric driving circuit is connected between the first battery pack and the second battery pack, the second end of each electric driving circuit is connected with the charging and discharging ports, and any charging and discharging port, the power battery pack and the electric driving circuits can form a high-power boosting charging loop of a single charging gun. According to the battery control system, electric energy input by any charging and discharging port can be boosted and charged for the power battery pack alternately by the plurality of electric drive circuits in the high-power boosting and charging loop, so that larger charging and discharging power is realized, and the high-power charging requirement of a user is met.

Inventors

• LIAN YUBO
• LING HEPING
• PAN HUA
• LI JICHENG
• CHEN GUANHUI

Assignees

• 比亚迪股份有限公司
• 比亚迪汽车工业有限公司

Dates

Publication Date

20260505

Application Date

20230421

Claims (17)

1. 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; any charge and discharge port, the power battery pack and the plurality of electric drive circuits can form a high-power boosting charging loop of a single charging gun; When the power battery pack is charged through any charging and discharging port, the plurality of electric drive circuits are configured to alternately boost the power battery pack to form a high-power boosting charging loop of the single charging gun; 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 with 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, and second ends of the three coil branches of each opposite pole are connected in a common mode to form a pole; The first N line is connected with the positive electrode of the charging and discharging port, and is connected between the first battery pack and the second battery pack; or partial poles of the winding of the motor are connected with each other in a sharing way and are led out of a second N line, the second N line is connected with the positive electrode of the charging and discharging port, the other partial poles of the winding of the motor are connected with each other in a sharing way and are led out of a third N line, and the third N line is connected between the first battery pack and the second battery pack.
2. 2. The battery control system of claim 1, wherein 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.
3. 3. The battery control system of claim 1, wherein any one of the electric drive circuit and the power cell pack can form a self-heating circuit, the battery control system further comprising: A charge-discharge on-off switching unit configured to turn on or off the high-power boost charging circuit; and the self-heating on-off switch unit is configured to enable the self-heating loop to be conducted or disconnected.
4. 4. The battery control system of claim 3, wherein 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 control the inverter, the charge-discharge on-off switching unit, and the self-heating on-off switching unit in each of the electric drive circuits such that at least one of a charge/discharge function, a self-heating function, and a driving function is implemented.
5. 5. The battery control system of claim 4, wherein the plurality of electrical drive circuits includes a first electrical drive circuit and a second electrical drive circuit, the charge-discharge port including 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 and the first electric drive circuit can form a first self-heating loop, the power battery pack and the second electric drive circuit can form a second self-heating loop, the self-heating on-off switch unit comprises a first self-heating on-off switch unit and a second self-heating on-off switch unit, the first self-heating on-off switch unit is configured to enable the first self-heating loop to be conducted or disconnected, and the second self-heating on-off switch unit is configured to enable the second self-heating loop to be conducted or disconnected.
6. 6. The battery control system of claim 5, 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 charge-discharge on-off switch unit are controlled, so that the electric energy input from the first charge-discharge port or the second charge-discharge port alternately charges the power battery pack through the first electric drive circuit and the second electric drive circuit.
7. 7. The battery control system of claim 5, wherein the controller is configured to: when the power battery pack is in the second 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.
8. 8. The battery control system of claim 5, wherein the controller is configured to: When the power battery pack is in a third state, the inverter and the charge-discharge on-off switch unit in the first electric drive circuit are controlled to enable the 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 the inverter and the second self-heating on-off switch unit in the second electric drive circuit are controlled to enable the first battery pack and the second battery pack to be alternately charged and discharged so as to heat the power battery pack.
9. 9. The battery control system of claim 5, wherein the controller is configured to: When the power battery pack is in a fourth state, the inverter and the charge-discharge on-off switch unit in the first electric drive circuit are controlled, 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 and the second self-heating on-off switch unit in the second electric drive circuit are controlled, so that the first battery pack and the second battery pack are alternately charged and discharged to heat the power battery pack.
10. 10. The battery control system of claim 5, wherein the controller is configured to: when the power battery pack is in a fifth state, the inverter and the charge-discharge on-off switch unit in the first electric drive circuit are controlled to enable the 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 the inverter and the charge-discharge on-off switch unit in the second electric drive circuit are controlled 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.
11. 11. The battery control system of claim 5, wherein the controller is configured to: When the power battery pack is in a sixth state, the inverter and the charge-discharge on-off switch unit in the first electric drive circuit are controlled 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 and the charge-discharge on-off switch unit in the second electric drive circuit are controlled so that electric energy input through the second charge-discharge port is output to the power battery pack to charge the power battery pack.
12. 12. The battery control system of claim 5, wherein the controller is configured to: When the power battery pack is in a seventh state, the inverter and the charge-discharge on-off switch unit in the first electric drive circuit are controlled, 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 and the charge-discharge on-off switch unit in the second electric drive circuit are controlled, so that electric energy output by the power battery pack is output to the second charge-discharge port to supply power for a second load.
13. 13. The battery control system of any of claims 5-12, 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.
14. 14. The battery control system of claim 5, 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.
15. 15. The battery control system of claim 5, 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.
16. 16. The battery control system of claim 5, wherein the controller is configured to: Controlling the phase stagger 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, and controlling the phase stagger of any two-phase bridge arm in the bridge arm group of the inverter of the first electric drive circuit and the phase stagger of any two-phase bridge arm in the bridge arm group of the inverter of the second electric drive circuit, or 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 all bridge arms in the bridge arm group of the inverter of the first electric drive circuit is controlled to be the same, and the phase of all bridge arms in the bridge arm group of the inverter of the second electric drive circuit is controlled to be the same.
17. 17. A vehicle comprising a battery control system as claimed in any one of claims 1 to 16.

Description

Battery control system and vehicle Technical Field The disclosure relates to the technical field of vehicle control, in particular to a battery control system and a vehicle. Background With the development and rapid popularization of electric vehicles, since electric vehicles are powered by power batteries, lithium ion-based power batteries are widely used. The power battery is charged and discharged at a proper temperature, so that the charging and discharging efficiency of the power battery can be improved, and the service life of the power battery can be prolonged. Various charging modes are adopted for the power battery, a direct current charging mode is generally adopted, and an alternating current charging mode is adopted for part of vehicles. In the related art, the charging power of the existing charging pile is fixed, so that the charging time is long, and the requirement of high-power quick charging of a user is not met. 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; Any one of the charge and discharge ports, the power battery pack and the plurality of electric drive circuits can form a high-power boosting charging loop of the single charging gun. 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 with 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, and second ends of the three coil branches of each opposite pole are connected in a common mode to form a pole; The first N line is connected with the 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; Or partial poles of the windings are connected together and led out to form a second N line, the second N line is connected with the positive electrode of the charging and discharging port, the other partial poles of the windings are connected together and led out to form 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, any one of the electric driving circuit and the power battery pack may form a self-heating loop, and the battery control system further includes: A charge-discharge on-off switching unit configured to turn on or off the high-power boost charging circuit; and the self-heating on-off switch unit is configured to enable the self-heating loop to be conducted or disconnected. 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 control the inverter, the charge-discharge on-off switching unit, and the self-heating on-off switching unit in each of the electric drive circuits such that at least one of a charge/discharge function, a self-heating function, and a driving function is implemented. Optionally, the plurality of electric driving circuits include a first electric driving circuit and a second electric driving circuit, and the charge-discharge ports include 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 and the first electric drive circuit can form a first self-heating loop, the power battery pack and the second electric drive circuit can form a second self-heating loop, the self-heating on-off