Circuit control method, electronic device, power supply circuit, load circuit and vehicle

Abstract

The invention discloses a control method of a power supply circuit, an electronic device, the power supply circuit, a load circuit and a vehicle. A power supply circuit relates to the technical field of circuit control, the power supply circuit comprises a power battery pack, a main switch, branch switches and a cooling system, the power battery pack is connected with the cooling system through the main switch, the power battery pack comprises at least two power supply modules, adjacent power supply modules are connected with the cooling system through branches, the branches are provided with the branch switches, and the branch switches are connected with the cooling system through the branch switches. The control method comprises the following steps: when any one power supply module is subjected to thermal runaway, switching off a main switch close to the power supply module subjected to thermal runaway, and switching on a main switch far away from the power supply module subjected to thermal runaway and a branch switch on a branch connected with the power supply module subjected to thermal runaway, therefore, the power supply module without thermal runaway is communicated with the cooling system. Normal operation of the cooling system can be ensured.

Description

Technical Field

[0001] The present application relates to the field of circuit control technology, and more specifically, to a power supply circuit control method, an electronic device, a power supply circuit, a load circuit, and a vehicle. Background Art

[0002] If the cells in the power battery pack experience thermal runaway, they may catch fire or explode. Therefore, the air conditioning system is required to cool the power battery pack. However, if the cells experience thermal runaway, the power battery system disconnects the relays connecting the positive and negative terminals of the power battery pack. This prevents the power battery pack from providing high-voltage power to the air conditioning system, forcing the system to rely solely on the low-voltage battery. This reduces the cooling efficiency of the air conditioning system. Summary of the Invention

[0003] Embodiments of the present application provide a power supply circuit control method, an electronic device, a power supply circuit, a load circuit, and a vehicle.

[0004] The control method of the power supply circuit of the embodiment of the present application includes a power battery pack, a main switch, a branch switch and a cooling system. The power battery pack is connected to the cooling system through the main switch. The power battery pack includes at least two power supply modules. Adjacent power supply modules are connected to the cooling system through branches, and branch switches are provided on the branches. The control method includes: in the event that thermal runaway occurs in any power supply module, disconnecting the main switch close to the power supply module where thermal runaway occurs, closing the main switch away from the power supply module where thermal runaway occurs and the branch switch on the branch connected to the power supply module where thermal runaway occurs, so that the power supply module that has not experienced thermal runaway is connected to the cooling system.

[0005] In certain embodiments, in the event that thermal runaway occurs in any power supply module, the main switch close to the power supply module where thermal runaway occurs is disconnected, and the main switch away from the power supply module where thermal runaway occurs and the branch switch close to the power supply module where thermal runaway occurs are closed, including: in the event that thermal runaway occurs in any power supply module located at both ends of the power battery pack, the main switch close to the power supply module where thermal runaway occurs is disconnected, and the main switch away from the power supply module where thermal runaway occurs and the branch switch on the branch connected to the power supply module where thermal runaway occurs are closed.

[0006] In certain embodiments, in the event that thermal runaway occurs in any power supply module, the main switch close to the power supply module where thermal runaway occurs is disconnected, and the main switch away from the power supply module where thermal runaway occurs and the branch switch close to the power supply module where thermal runaway occurs are closed, including: in the event that thermal runaway occurs in any power supply module that is not located at either end of the power battery pack, the main switch close to the power supply module where thermal runaway occurs is disconnected, the main switch away from the power supply module where thermal runaway occurs is closed, and the branch switch on the branch connected to the power supply module where thermal runaway occurs and close to the closed main switch; or, in the event that thermal runaway occurs in any power supply module that is not located at either end of the power battery pack, the main switch close to the power supply module where thermal runaway occurs is closed, the main switch away from the power supply module where thermal runaway occurs is disconnected, and the branch switch on the branch connected to the power supply module where thermal runaway occurs and close to the closed main switch.

[0007] In some embodiments, the power supply circuit also includes an electronic control module and a motor, the electronic control module includes multiple switching tubes, and the power battery pack is connected to the cooling system through the main switch, the switching tube and the motor. The control method also includes: in the event of thermal runaway of any power supply module, the switching tube close to the closed main switch is controlled to be turned on, and the switching tube away from the closed main switch is controlled to be turned off, so that the motor is charged through the power supply module that has not experienced thermal runaway; when the motor is fully charged, the switching tube away from the closed main switch is controlled to be turned on, and the switching tube close to the closed main switch is controlled to be turned off, so that the power supply module that has not experienced thermal runaway supplies high voltage to the cooling system through the motor.

[0008] In some embodiments, the power supply circuit also includes an electronic control module and a motor, the electronic control module includes multiple switching tubes, and the power battery pack is connected to the cooling system through the main switch, the switching tube and the motor. The control method also includes: in the event of thermal runaway of any power supply module, the switching tube close to the closed main switch is controlled to be turned on, and the switching tube away from the closed main switch is controlled to be turned off, so that the motor is charged through the power supply module that has not experienced thermal runaway; when the charging time of the motor reaches a preset charging time, the switching tube away from the closed main switch is controlled to be turned on, and the switching tube close to the closed main switch is controlled to be turned off, so that the power supply module that has not experienced thermal runaway supplies high voltage to the cooling system through the motor.

[0009] In certain embodiments, the motor has an inductor assembly therein, and the power battery pack is connected to the cooling system via the main switch, the switch tube, and the inductor assembly.

[0010] In some embodiments, the power supply circuit also includes an electronic control module, and the power battery pack is connected to the cooling system through a main switch and a switch tube. The control method also includes: in the event that thermal runaway occurs in any power supply module, the switch tube away from the closed main switch is controlled to be turned on, and the switch tube close to the closed main switch is controlled to be turned off, so that the power supply module that has not experienced thermal runaway can supply power to the cooling system.

[0011] In some embodiments, both the main switch and the branch switches are relays.

[0012] In certain embodiments, in the event that thermal runaway occurs in any power supply module, before disconnecting the main switch close to the power supply module where thermal runaway occurs and closing the main switch away from the power supply module where thermal runaway occurs and the branch switch on the branch connected to the power supply module where thermal runaway occurs, the control method further includes: real-time detection of the temperature of the power supply module, and determining that thermal runaway occurs in the power supply module when the temperature of the power supply module exceeds a preset temperature threshold.

[0013] The present application also provides an electronic device, which includes a memory and a processor. The memory is configured to store a computer program. When the processor executes the computer program, it implements the control method in any of the above embodiments.

[0014] The present application also provides a power supply circuit, which includes the electronic device described in any of the above embodiments, as well as a power battery pack, a main switch, a branch switch and a cooling system; the power battery pack is connected to the cooling system through the main switch, and the power battery pack includes at least two power supply modules, and adjacent power supply modules are connected to the cooling system through branches, and branch switches are provided on the branches.

[0015] In some embodiments, the power supply circuit further includes an electronic control module and a motor. The electronic control module includes multiple switch tubes. The power battery pack is connected to the cooling system through the main switch, the switch tubes and the motor.

[0016] In certain embodiments, the motor has an inductor assembly therein, and the power battery pack is connected to the cooling system via the main switch, the switch tube, and the inductor assembly.

[0017] In certain embodiments, the power supply circuit further includes an electronic control module, and the power battery pack is connected to the cooling system via a main switch and a switch tube.

[0018] In some embodiments, both the main switch and the branch switches are relays.

[0019] The present application also provides a load circuit, which includes the electronic device in any one of the above embodiments or the power supply circuit in any one of the above embodiments.

[0020] The present application also provides a vehicle, comprising the electronic device in any one of the above embodiments, or the power supply circuit in any one of the above embodiments, or the load circuit in any one of the above embodiments.

[0021] The present application provides a control method for a power supply circuit, in which a power battery pack is connected to a cooling system through a main switch. The present application divides the power battery pack into at least two power supply modules, and adds a branch with a branch switch between adjacent power supply modules, and then connects the power supply module to the cooling system through the branch. In the event that thermal runaway occurs in any power supply module, the main switch close to the power supply module that has thermal runaway is disconnected, and the main switch away from the power supply module that has thermal runaway and the branch switch on the branch connected to the power supply module that has thermal runaway are closed, so that the power supply module that has thermal runaway in the power battery pack no longer continues to supply power to the cooling system, but the power supply module that has not thermal runaway still supplies power to the cooling system. The present application can continue to supply power to the cooling system through the power supply module that has not thermal runaway when thermal runaway occurs in some power supply modules in the power battery pack, thereby ensuring that the cooling system can operate normally.

[0022] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a schematic structural diagram of a power supply circuit in some embodiments of the present application;

[0025] Figure 2 is a flow chart of a method for controlling a power supply circuit in some embodiments of the present application;

[0026] Figure 3 is a schematic structural diagram of a power supply circuit in some embodiments of the present application;

[0027] Figure 4 is a flow chart of a method for controlling a power supply circuit in some embodiments of the present application;

[0028] Figure 5 is a schematic structural diagram of a power supply circuit in some embodiments of the present application;

[0029] Figure 6 is a schematic structural diagram of a power supply circuit in some embodiments of the present application;

[0030] Figure 7is a schematic structural diagram of a power supply circuit in some embodiments of the present application;

[0031] Figure 8 is a schematic structural diagram of a power supply circuit in some embodiments of the present application;

[0032] Figure 9 is a schematic structural diagram of a power supply circuit in some embodiments of the present application;

[0033] Figure 10 is a flow chart of a method for controlling a power supply circuit in some embodiments of the present application;

[0034] Figure 11 is a flow chart of a method for controlling a power supply circuit in some embodiments of the present application;

[0035] Figure 12 is a schematic structural diagram of a power supply circuit in some embodiments of the present application;

[0036] Figure 13 is a flow chart of a method for controlling a power supply circuit in some embodiments of the present application;

[0037] Figure 14 is a schematic structural diagram of a load circuit in some embodiments of the present application;

[0038] Figure 15 It is a schematic structural diagram of a vehicle according to certain embodiments of the present application.

[0039] Description of main component symbols:

[0040] Vehicles 1000;

[0041] Load circuit 100;

[0042] Power supply circuit 10;

[0043] Power battery pack 11 ; power supply module 111 ; main switch 12 ; branch switch 13 ; cooling system 14 ; motor 15 ; inductor assembly 151 ; electronic control module 16 ; switch tube 161 . DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and should not be understood as limiting the embodiments of the present application.

[0045] The battery cell of a power battery pack refers to the basic unit that constitutes the power battery pack. The battery cells can form a power supply module to form a power battery pack. The battery cell is the core component of the battery, which is responsible for storing and releasing electrical energy and plays the role of energy storage and conversion. After the battery cell in the power battery pack undergoes thermal runaway, fire and explosion may occur. Therefore, it is necessary to cool the power battery pack through the power battery system through the air-conditioning system. However, after the battery cell undergoes thermal runaway, the power battery system will disconnect the relay connecting the positive and negative poles of the power battery pack, which causes the power battery pack to be unable to continue to supply high voltage to the air-conditioning system. The air-conditioning system can only be powered by a low-voltage battery, which reduces the cooling efficiency of the air-conditioning system. How to ensure the working efficiency of the cooling system after the battery cell undergoes thermal runaway has become a difficult problem that those skilled in the art urgently need to solve. In order to solve this problem, the present application provides a control method for a power supply circuit (such as Figure 1 As shown), electronic device, power supply circuit 10 (as Figure 1 as well as Figure 7 As shown), load circuit 100 and vehicle 1000 (as shown Figure 15 shown).

[0046] See also Figure 1 、 Figure 2 as well as Figure 3 The control method of the power supply circuit according to the embodiment of the present application comprises the following steps:

[0047] 03: In the event that thermal runaway occurs in any power supply module 111, the main switch 12 close to the power supply module 111 where thermal runaway occurs is disconnected, and the main switch 12 away from the power supply module 111 where thermal runaway occurs and the branch switch 13 on the branch connected to the power supply module 111 where thermal runaway occurs are closed, so that the power supply module 111 that has not experienced thermal runaway is connected to the cooling system 14.

[0048] The control method of the above-mentioned power supply circuit can be applied to the power supply circuit 10. The power supply circuit 10 of the embodiment of the present application includes a power battery pack 11, a main switch 12, a branch switch 13 and a cooling system 14. The power battery pack 11 is connected to the cooling system 14 through the main switch 12. The power battery pack 11 includes at least two power supply modules 111. Adjacent power supply modules 111 are connected to the cooling system 14 through branches, and a branch switch 13 is provided on the branch.

[0049] Specifically, the cooling system 14 can ensure the safe operation of the power battery under high load or high temperature environment. The types of cooling systems 14 include battery direct cooling air-conditioning systems and battery liquid cooling air-conditioning systems. Among them, the battery direct cooling air-conditioning system includes a compressor, a condenser, an expansion valve, a battery cold plate evaporator, a refrigerant, a platinum thermal resistor and corresponding pipelines. The battery liquid cooling air-conditioning system includes a compressor, a condenser, an expansion valve, a battery cold plate, a refrigerant, a coolant, a heat exchanger, a water pump, a platinum thermal resistor, a temperature sensor and corresponding pipelines. The power supply circuit 10 is responsible for providing the electrical energy required by the cooling system 14, including providing electrical energy to components such as the compressor, fan, and solenoid valve. The rated voltage of the compressor of the cooling system 14 is relatively high, so it needs to be powered by the power battery pack 11 with a higher voltage to enable the compressor to maintain good and effective working efficiency.

[0050] More specifically, the power supply circuit 10 includes a power battery pack 11, a main switch 12, a branch switch 13 and a cooling system 14. The power battery pack 11 is connected to the cooling system 14 through the main switch 12. The power battery pack 11 includes at least two power supply modules 111. Adjacent power supply modules 111 are connected to the cooling system 14 through branches, and a branch switch 13 is provided on the branch. Among them, the power battery pack 11 is the core energy provider for electric vehicles or other electric drive equipment. The power battery pack 11 is composed of multiple power supply modules 111. Each power supply module 111 contains one or more battery cells, thereby ensuring that each power supply module 111 can independently provide electrical energy. Multiple power supply modules 111 are connected in series to form an integral power battery pack 11. The main switch 12 connects the power battery pack 11 and the cooling system 14. The main switch 12 controls whether the entire power battery pack 11 supplies power to the cooling system 14. By controlling the opening and closing of the main switch 12 , it is possible to ensure that the cooling system 14 is activated when the battery temperature is too high, thereby preventing the battery from overheating.

[0051] Furthermore, the branch is a channel connecting each power supply module 111 with the cooling system 14. Through the branch, each power supply module 111 in the power battery pack 11 can supply power to the cooling system 14 individually or in collaboration. A branch switch 13 is provided on the branch. The branch switch 13 can be used to control the number of power supply modules 111 supplying power to the cooling system 14, and can also be used to control which power supply modules 111 supply power to the cooling system 14. By controlling the opening and closing of the branch switch 13, it can be ensured that in the event of thermal runaway of the battery cells in the power battery pack 11, other power supply modules 111 that have not experienced thermal runaway can still supply power to the cooling system 14, thereby ensuring the normal operation of the cooling system 14 as much as possible, preventing the heat of the battery cells that have experienced thermal runaway from spreading and causing thermal runaway of the battery cells in the entire power battery pack 11, thereby greatly reducing the risk of fire and explosion of the power battery pack 11.

[0052] Specifically, in method 03, please combine Figure 3 ( Figure 3 The power supply module 111 in the dotted box is the power supply module 111 that has thermal runaway. The power supply module 111 that has thermal runaway will experience thermal runaway due to reasons such as the temperature increase of the battery cell or internal short circuit. In the case of thermal runaway of the power supply module 111, it is first necessary to disconnect the main switch 12 close to the power supply module 111 that has thermal runaway. After this main switch 12 is disconnected, the energy flow of the power battery pack 11 will be cut off, which can prevent the temperature of the power supply module 111 that has thermal runaway from further increasing. Then, close the main switch 12 away from the power supply module 111 that has thermal runaway and the branch switch 13 on the branch connected to the power supply module 111 that has thermal runaway, so that other power supply modules 111 that have not experienced thermal runaway continue to supply power to the cooling system 14. In this way, the power supply module 111 that has not experienced thermal runaway can still provide power support for the normal operation of the cooling system 14 and other loads, and ensure that the cooling system 14 will not be powered by a battery with too low a voltage, that is, the normal operation of the cooling system 14 is ensured, so that the power supply module 111 that has experienced thermal runaway can return to normal temperature as soon as possible.

[0053] It can be understood that the present application provides a control method for a power supply circuit, in which, within the power supply circuit 10, a power battery pack 11 is connected to a cooling system 14 via a main switch 12. The present application divides the power battery pack 11 into at least two power supply modules 111, and adds a branch with a branch switch 13 between adjacent power supply modules 111, and then connects the power supply module 111 to the cooling system 14 via the branch. In the event that thermal runaway occurs in any power supply module 111, the main switch 12 close to the power supply module 111 where thermal runaway occurs is disconnected, and the main switch 12 away from the power supply module 111 where thermal runaway occurs and the branch switch 13 on the branch connected to the power supply module 111 where thermal runaway occurs are closed, so that the power supply module 111 in the power battery pack 11 where thermal runaway occurs no longer continues to supply power to the cooling system 14, but the power supply module 111 that has not undergone thermal runaway still supplies power to the cooling system 14. This application can continue to supply power to the cooling system 14 through the power modules 111 that have not experienced thermal runaway when some power modules 111 in the power battery pack 11 experience thermal runaway, thereby ensuring that the cooling system 14 can operate normally.

[0054] In certain embodiments, see Figure 1 、 Figure 3 and Figure 403: When any power supply module 111 experiences thermal runaway, the main switch 12 close to the power supply module 111 experiencing thermal runaway is disconnected, and the main switch 12 away from the power supply module 111 experiencing thermal runaway and the branch switch 13 close to the power supply module 111 experiencing thermal runaway are closed, including:

[0055] 031: In the event that thermal runaway occurs in any of the power supply modules 111 located at both ends of the power battery pack 11, the main switch 12 close to the power supply module 111 where thermal runaway occurs is disconnected, and the main switch 12 away from the power supply module 111 where thermal runaway occurs and the branch switch 13 on the branch connected to the power supply module 111 where thermal runaway occurs are closed.

[0056] The above-mentioned control method of the power supply circuit can be applied to the power supply circuit 10 .

[0057] Specifically, the power supply module 111 that has thermal runaway will experience thermal runaway due to reasons such as the temperature increase of the battery cells or internal short circuit. In the event that any power supply module 111 located at either end of the power battery pack 11 has thermal runaway, it is first necessary to disconnect the main switch 12 close to the power supply module 111 that has thermal runaway. After this main switch 12 is disconnected, the energy flow of the power battery pack 11 will be cut off, which can prevent the temperature of the power supply module 111 that has thermal runaway from further increasing. Then, close the main switch 12 away from the power supply module 111 that has thermal runaway and the branch switch 13 on the branch connected to the power supply module 111 that has thermal runaway, so that other power supply modules 111 that have not experienced thermal runaway continue to supply power to the cooling system 14. In this way, the power supply module 111 that has not experienced thermal runaway can still provide power support for the normal operation of the cooling system 14 and other loads, and ensure that the cooling system 14 will not be powered by a battery with too low a voltage, that is, the normal operation of the cooling system 14 is ensured, so that the power supply module 111 that has experienced thermal runaway can return to normal temperature as soon as possible.

[0058] In certain embodiments, see Figure 5 and Figure 6 ( Figure 5 as well as Figure 6 The power supply module 111 in the dashed box is the power supply module 111 that experiences thermal runaway. 03: When any power supply module 111 experiences thermal runaway, the main switch 12 near the power supply module 111 experiencing thermal runaway is disconnected, and the main switch 12 away from the power supply module 111 experiencing thermal runaway and the branch switch 13 near the power supply module 111 experiencing thermal runaway are closed, including:

[0059] 032: In the event that any power supply module 111 not located at either end of the power battery pack 11 experiences thermal runaway, the main switch 12 close to the power supply module 111 experiencing thermal runaway is disconnected, the main switch 12 away from the power supply module 111 experiencing thermal runaway is closed, and the branch switch 13 on the branch connected to the power supply module 111 experiencing thermal runaway and close to the closed main switch 12 is closed; or,

[0060] 033: In the event that any power supply module 111 that is not located at the two ends of the power battery pack 11 experiences thermal runaway, the main switch 12 close to the power supply module 111 experiencing thermal runaway is closed, the main switch 12 far from the power supply module 111 experiencing thermal runaway is disconnected, and the branch switch 13 on the branch connected to the power supply module 111 experiencing thermal runaway and close to the closed main switch 12 is closed.

[0061] The above-mentioned control method of the power supply circuit can be applied to the power supply circuit 10 .

[0062] Specifically, please combine Figure 5 , the power supply module 111 that has thermal runaway will experience thermal runaway due to reasons such as the temperature increase of the battery cells or internal short circuit. In the event that any power supply module 111 that is not located at the two ends of the power battery pack 11 has thermal runaway, it is first necessary to disconnect the main switch 12 close to the power supply module 111 that has thermal runaway. After this main switch 12 is disconnected, the energy flow of the power battery pack 11 will be cut off, which can prevent the temperature of the power supply module 111 that has thermal runaway from further increasing. Then, close the main switch 12 away from the power supply module 111 that has thermal runaway, and close the branch switch 13 on the branch connected to the power supply module 111 that has thermal runaway and close to the closed main switch 12, so that other power supply modules 111 that have not experienced thermal runaway continue to supply power to the cooling system 14. In this way, the power supply module 111 that has not experienced thermal runaway can still provide power support for the normal operation of the cooling system 14 and other loads, and ensure that the cooling system 14 will not be powered by a battery with too low a voltage, that is, the normal operation of the cooling system 14 is ensured, so that the power supply module 111 that has experienced thermal runaway can return to normal temperature as soon as possible.

[0063] Specifically, please combine Figure 6, the power supply module 111 that has thermal runaway will experience thermal runaway due to reasons such as the temperature increase of the battery cells or internal short circuit. In the event that any power supply module 111 that is not located at the two ends of the power battery pack 11 has thermal runaway, it is first necessary to disconnect the main switch 12 away from the power supply module 111 that has thermal runaway. After this main switch 12 is disconnected, the energy flow of the power battery pack 11 will be cut off, which can prevent the temperature of the power supply module 111 that has thermal runaway from further increasing. Then, close the main switch 12 close to the power supply module 111 that has thermal runaway, and close the branch switch 13 on the branch connected to the power supply module 111 that has thermal runaway and close to the closed main switch 12, so that other power supply modules 111 that have not experienced thermal runaway continue to supply power to the cooling system 14. In this way, the power supply module 111 that has not experienced thermal runaway can still provide power support for the normal operation of the cooling system 14 and other loads, and ensure that the cooling system 14 will not be powered by a battery with too low a voltage, that is, the normal operation of the cooling system 14 is ensured, so that the power supply module 111 that has experienced thermal runaway can return to normal temperature as soon as possible.

[0064] In certain embodiments, see Figure 7 The power supply circuit 10 also includes a motor 15 , and the power battery pack 11 is connected to the motor 15 and the cooling system 14 through a main switch 12 .

[0065] Specifically, the power supply circuit 10 also includes a motor 15 and an electronic control module 16, and the power battery pack 11 is connected to the motor 15 and the cooling system 14 through the main switch 12. Among them, the motor 15 and the electronic control module 16 cooperate to form a boost circuit in the power supply circuit, thereby achieving a boost effect. In the event that a power supply module 111 in the power battery pack 11 has thermal runaway, even if other power supply modules 111 that have not experienced thermal runaway are used to power the cooling system 14, the voltage of the compressor in the cooling system 14 may still not reach the rated voltage of the compressor. Therefore, if a motor 15 with a voltage boosting function is added to the power supply circuit 10, it can ensure that the cooling system 14 operates normally at the rated voltage, so that the cooling system 14 can reduce the temperature of the power supply module 111 that has experienced thermal runaway as quickly as possible, thereby avoiding the risk of fire or explosion in the power battery pack 11.

[0066] See also Figure 7 In some embodiments, the motor 15 has an inductor component 151 , and the power battery pack 11 is connected to the inductor component 151 and the cooling system 14 via a main switch 12 .

[0067] It is understood that the motor 15 has an inductor component 151 inside, and the inductor component 151 inside the motor 15 achieves a circuit voltage boost by cooperating with the electronic control module 16. For example, the motor 15 can be a three-phase motor 15.

[0068] See also Figure 8 、 Figure 9 and Figure 10 In some embodiments, the control method further comprises:

[0069] 051: When any power supply module 111 experiences thermal runaway, the switch tube 161 close to the closed main switch 12 is controlled to be turned on, and the switch tube 161 far from the closed main switch 12 is controlled to be turned off, so that the motor 15 is charged through the power supply module 111 that has not experienced thermal runaway;

[0070] 071: When the motor 15 is fully charged, the switch tube 161 away from the closed main switch 12 is controlled to be turned on, and the switch tube 161 close to the closed main switch 12 is controlled to be turned off, so that the power supply module 111 that has not experienced thermal runaway can supply high voltage power to the cooling system 14 through the motor 15.

[0071] The above-mentioned control method of the power supply circuit can be applied to the power supply circuit 10 , which also includes an electronic control module 16 and a motor 15 . The power battery pack 11 is connected to the cooling system 14 via the main switch 12 , the switch tube 161 and the motor 15 .

[0072] Specifically, please combine Figure 8 and Figure 9 ( Figure 8 and Figure 9 The power supply module 111 in the middle dotted box is the power supply module 111 that has thermal runaway. Figure 8 Corresponding method 051, Figure 9Corresponding method 071), when any power supply module 111 has thermal runaway, first control the switch tube 161 close to the closed main switch 12 to be turned on, and control the switch tube 161 away from the closed main switch 12 to be turned off. This cuts off the energy flow between the power battery pack 11 and the cooling system 14, which can prevent the temperature of the power supply module 111 that has thermal runaway from further rising. At the same time, the power supply module 111 that has not experienced thermal runaway begins to charge the inductor component 151 in the motor 15. Afterwards, when the motor 15 has completed charging, control the switch tube 161 away from the closed main switch 12 to be turned on, and control the switch tube 161 close to the closed main switch 12 to be turned off, so that the power supply module 111 that has not experienced thermal runaway can supply high voltage to the cooling system 14 through the motor 15. In this way, the power supply module 111 that has not experienced thermal runaway can still provide power support for the normal operation of the cooling system 14 and other loads, and ensure that the cooling system 14 will not be powered by a battery with too low a voltage, that is, the normal operation of the cooling system 14 is ensured, so that the power supply module 111 that has experienced thermal runaway can return to normal temperature as soon as possible. At the same time, the power supply module 111 that has not experienced thermal runaway can also provide a higher voltage to the compressor in the cooling system 14 through the boost effect of the motor 15 and the electronic control module 16, to ensure that the compressor can continue to operate at the rated voltage.

[0073] See also Figure 8 、 Figure 9 and Figure 11 In some embodiments, the control method further comprises:

[0074] 053: When any power supply module 111 experiences thermal runaway, the switch tube 161 close to the closed main switch 12 is controlled to be turned on, and the switch tube 161 far from the closed main switch 12 is controlled to be turned off, so that the motor 15 is charged through the power supply module 111 that has not experienced thermal runaway;

[0075] 073: When the charging time of the motor 15 reaches the preset charging time, the switch tube 161 away from the closed main switch 12 is controlled to be turned on, and the switch tube 161 close to the closed main switch 12 is controlled to be turned off, so that the power supply module 111 that has not experienced thermal runaway can supply high voltage to the cooling system 14 through the motor 15.

[0076] The above-mentioned control method of the power supply circuit can be applied to the power supply circuit 10 , which also includes an electronic control module 16 and a motor 15 . The power battery pack 11 is connected to the cooling system 14 via the main switch 12 , the switch tube 161 and the motor 15 .

[0077] Specifically, please combine Figure 8 as well as Figure 9 ( Figure 8 and Figure 9The power supply module 111 in the middle dotted box is the power supply module 111 that has thermal runaway. Figure 8 Corresponding method 053, Figure 9 Corresponding method 073) When any power supply module 111 experiences thermal runaway, the switch tube 161 close to the closed main switch 12 is first controlled to be turned on, and the switch tube 161 away from the closed main switch 12 is controlled to be turned off. This cuts off the energy flow between the power battery pack 11 and the cooling system 14, which can prevent the temperature of the power supply module 111 that has experienced thermal runaway from further rising. At the same time, the power supply module 111 that has not experienced thermal runaway begins to charge the inductor component 151 in the motor 15. Thereafter, when the charging time of the motor 15 reaches the preset charging time, that is, when the motor 15 is fully charged, the switch tube 161 away from the closed main switch 12 is controlled to be turned on, and the switch tube 161 close to the closed main switch 12 is controlled to be turned off, so that the power supply module 111 that has not experienced thermal runaway can supply high voltage power to the cooling system 14 through the motor 15. In this way, the power supply module 111 that has not experienced thermal runaway can still provide electrical energy support for the normal operation of the cooling system 14 and other loads, and ensure that the cooling system 14 will not be powered by a battery with too low a voltage, that is, the normal operation of the cooling system 14 is ensured, so that the power supply module 111 that has experienced thermal runaway can return to normal temperature as soon as possible. At the same time, the power supply module 111 that has not experienced thermal runaway can also provide a higher voltage to the compressor in the cooling system 14 through the boost effect of the motor 15 and the electronic control module 16, to ensure that the compressor can continue to operate at the rated voltage.

[0078] See also Figure 12 In some embodiments, the control method further comprises:

[0079] In the event that thermal runaway occurs in any power supply module 111 , the switch tube 161 away from the closed main switch 12 is controlled to be turned on, and the switch tube 161 close to the closed main switch 12 is controlled to be turned off, so that the power supply module 111 that has not experienced thermal runaway can supply power to the cooling system 14 .

[0080] The control method of the power supply circuit described above can be applied to the power supply circuit 10 . The power supply circuit 10 further includes an electronic control module 16 . The power battery pack 11 is connected to the cooling system 14 via a main switch 12 and a switch tube 161 .

[0081] Specifically, please combine Figure 12 ( Figure 12The power supply module 111 in the dotted box is the power supply module 111 that has experienced thermal runaway). The electronic control module 16 is one of the core control units of the electric vehicle, responsible for managing and coordinating the electrical system of the entire electric vehicle to ensure that all components operate in a reasonable working state. When the rated voltage of the compressor of the cooling system 14 is relatively small, and the normal operation of the cooling system 14 does not require the cooperation of the motor 15 and the electronic control module 16 (that is, when the normal operation of the cooling system 14 does not require further voltage boosting), in the event of thermal runaway of any power supply module 111, the switch tube 161 away from the closed main switch 12 is controlled to be turned on, and the switch tube 161 close to the closed main switch 12 is controlled to be turned off, so that the power supply module 111 that has not experienced thermal runaway directly supplies power to the cooling system 14 through the electronic control module 16.

[0082] In certain embodiments, see Figure 1 , the main switch 12 and the branch switch 13 are both relays.

[0083] It is understood that relays can effectively isolate control signals from the main current loop, reducing the impact of control circuit failures on the main circuit. Relays have a simple structure, a long service life, and can withstand high current loads, making them suitable for use in battery management systems. Furthermore, relays can switch very quickly, meeting the battery management system's requirements for rapid response to changes in temperature, voltage, and other factors. Therefore, relays can be used for both the main switch 12 and the branch switch 13 in this application.

[0084] See also Figure 1 as well as Figure 13 In some embodiments, 03: When any power supply module 111 experiences thermal runaway, before disconnecting the main switch 12 close to the power supply module 111 experiencing thermal runaway and closing the main switch 12 away from the power supply module 111 experiencing thermal runaway and the branch switch 13 on the branch connected to the power supply module 111 experiencing thermal runaway, the control method further includes:

[0085] 01: Detect the temperature of the power supply module 111 in real time. When the temperature of the power supply module 111 exceeds a preset temperature threshold, determine that thermal runaway occurs in the power supply module 111.

[0086] The above-mentioned control method of the power supply circuit can be applied to the power supply circuit 10 .

[0087] Specifically, in method 01, the present application determines whether thermal runaway occurs in the power supply module 111 by real-time detection of the temperature of the power supply module 111. Specifically, if the temperature of the power supply module 111 exceeds a preset temperature threshold, it is determined that thermal runaway occurs in the power supply module 111.

[0088] In summary, the present application provides a control method for a power supply circuit and a power supply circuit 10, in which a power battery pack 11 is connected to a cooling system 14 through a main switch 12. The present application divides the power battery pack 11 into at least two power supply modules 111, and adds a branch with a branch switch 13 between adjacent power supply modules 111, and then connects the power supply module 111 to the cooling system 14 through the branch. In the event that thermal runaway occurs in any power supply module 111, the main switch 12 close to the power supply module 111 that has thermal runaway is disconnected, and the main switch 12 away from the power supply module 111 that has thermal runaway and the branch switch 13 on the branch connected to the power supply module 111 that has thermal runaway are closed, so that the power supply module 111 that has thermal runaway in the power battery pack 11 no longer continues to supply power to the cooling system 14, but the power supply module 111 that has not thermal runaway still supplies power to the cooling system 14. This application can continue to supply power to the cooling system 14 through the power modules 111 that have not experienced thermal runaway when some power modules 111 in the power battery pack 11 experience thermal runaway, thereby ensuring that the cooling system 14 can operate normally.

[0089] In certain embodiments, the present application further provides an electronic device, which includes a memory and a processor, wherein the memory is configured to store a computer program, and when the processor executes the computer program, it implements the control method in any of the above embodiments.

[0090] In certain embodiments, see Figure 1 The present application also provides a power supply circuit 10, which includes the electronic device in any one of the above embodiments and a power battery pack 11, a main switch 12, a branch switch 13 and a cooling system 14; the power battery pack 11 is connected to the cooling system 14 through the main switch 12, and the power battery pack 11 includes at least two power supply modules 111, and adjacent power supply modules 111 are connected to the cooling system 14 through branches, and a branch switch 13 is provided on the branch.

[0091] In certain embodiments, see Figure 7 The power supply circuit 10 also includes a motor 15 , and the power battery pack 11 is connected to the motor 15 and the cooling system 14 through a main switch 12 .

[0092] In certain embodiments, see Figure 7 The motor 15 has an inductor component 151 , and the power battery pack 11 is connected to the inductor component 151 and the cooling system 14 through the main switch 12 .

[0093] In certain embodiments, see Figure 7The power supply circuit 10 also includes an electronic control module 16 and a motor 15 . The power battery pack 11 is connected to the cooling system 14 through the main switch 12 , the switch tube 161 and the motor 15 .

[0094] In certain embodiments, see Figure 7 The power supply circuit 10 also includes an electronic control module 16 , and the power battery pack 11 is connected to the cooling system 14 through the main switch 12 and the switch tube 161 .

[0095] In certain embodiments, see Figure 7 , the main switch 12 and the branch switch 13 are both relays.

[0096] In certain embodiments, see Figure 14 The present application also provides a load circuit 100, which includes the electronic device in any of the above embodiments or the power supply circuit 10 in any of the above embodiments.

[0097] In summary, in the load circuit 100 provided in the present application, the load circuit 100 includes a power supply circuit 10, within which a power battery pack 11 is connected to a cooling system 14 via a main switch 12. The present application divides the power battery pack 11 into at least two power supply modules 111, and adds a branch with a branch switch 13 between adjacent power supply modules 111, and then connects the power supply module 111 to the cooling system 14 via the branch. In the event that thermal runaway occurs in any power supply module 111, the main switch 12 close to the power supply module 111 where thermal runaway occurs is disconnected, and the main switch 12 away from the power supply module 111 where thermal runaway occurs and the branch switch 13 on the branch connected to the power supply module 111 where thermal runaway occurs are closed, so that the power supply module 111 in the power battery pack 11 where thermal runaway occurs no longer continues to supply power to the cooling system 14, but the power supply module 111 that has not undergone thermal runaway still supplies power to the cooling system 14. This application can continue to supply power to the cooling system 14 through the power modules 111 that have not experienced thermal runaway when some power modules 111 in the power battery pack 11 experience thermal runaway, thereby ensuring that the cooling system 14 can operate normally.

[0098] In certain embodiments, see Figure 15 The present application also provides a vehicle 1000 , which includes the electronic device in any of the above embodiments, or the power supply circuit 10 in any of the above embodiments, or the load circuit 100 in any of the above embodiments.

[0099] In the description of this specification, the reference terms "certain embodiments", "in an example", "exemplarily", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0100] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0101] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for controlling a power supply circuit, characterized in that: The power supply circuit includes a power battery pack, a main switch, a branch switch, and a cooling system. The power battery pack is connected to the cooling system via the main switch. The power battery pack includes at least two power supply modules. Adjacent power supply modules are connected to the cooling system via a branch. The branch switch is provided on the branch. The control method includes: In the event that thermal runaway occurs in any power supply module, the main switch close to the power supply module where thermal runaway occurs is disconnected, and the main switch away from the power supply module where thermal runaway occurs and the branch switch on the branch connected to the power supply module where thermal runaway occurs are closed, so that the power supply module that has not experienced thermal runaway is connected to the cooling system.

2. The control method according to claim 1, characterized in that: In the case where any power supply module has thermal runaway, disconnecting the main switch close to the power supply module having thermal runaway, and closing the main switch away from the power supply module having thermal runaway and the branch switch close to the power supply module having thermal runaway, comprises: In the event that thermal runaway occurs in any of the power supply modules located at both ends of the power battery pack, the main switch close to the power supply module where thermal runaway occurs is disconnected, and the main switch away from the power supply module where thermal runaway occurs and the branch switch on the branch connected to the power supply module where thermal runaway occurs are closed.

3. The control method according to claim 1, wherein: In the case where any power supply module has thermal runaway, disconnecting the main switch close to the power supply module having thermal runaway, and closing the main switch away from the power supply module having thermal runaway and the branch switch close to the power supply module having thermal runaway, comprises: In the event that any power supply module not located at the two ends of the power battery pack experiences thermal runaway, the main switch close to the power supply module experiencing thermal runaway is disconnected, the main switch away from the power supply module experiencing thermal runaway is closed, and the branch switch on the branch connected to the power supply module experiencing thermal runaway and close to the closed main switch is closed; or In the event that thermal runaway occurs in any power supply module that is not located at the two ends of the power battery pack, the main switch close to the power supply module where thermal runaway occurs is closed, the main switch away from the power supply module where thermal runaway occurs is disconnected, and the branch switch on the branch connected to the power supply module where thermal runaway occurs and close to the closed main switch is closed.

4. The control method according to claim 1, wherein: The power supply circuit further includes an electronic control module and a motor. The electronic control module includes a plurality of switch tubes. The power battery pack is connected to the cooling system via the main switch, the switch tubes, and the motor. The control method further includes: In the event that thermal runaway occurs in any of the power supply modules, the switch tube close to the closed main switch is controlled to be turned on, and the switch tube far from the closed main switch is controlled to be turned off, so that the motor is charged through the power supply module that has not experienced thermal runaway; When the motor is fully charged, the switch tube away from the closed main switch is controlled to be turned on, and the switch tube close to the closed main switch is controlled to be turned off, so that the power supply module that has not experienced thermal runaway can supply high voltage to the cooling system through the motor.

5. The control method according to claim 1, characterized in that: The power supply circuit further includes an electronic control module and a motor. The electronic control module includes a plurality of switch tubes. The power battery pack is connected to the cooling system via the main switch, the switch tubes, and the motor. The control method further includes: In the event that thermal runaway occurs in any of the power supply modules, the switch tube close to the closed main switch is controlled to be turned on, and the switch tube far from the closed main switch is controlled to be turned off, so that the motor is charged through the power supply module that has not experienced thermal runaway; When the charging time of the motor reaches a preset charging time, the switch tube away from the closed main switch is controlled to be turned on, and the switch tube close to the closed main switch is controlled to be turned off, so that the power supply module that has not experienced thermal runaway can provide high voltage power to the cooling system through the motor.

6. The control method according to claim 4 or 5, characterized in that: The motor has an inductor component therein, and the power battery pack is connected to the cooling system via the main switch, the switch tube and the inductor component.

7. The control method according to claim 1, characterized in that: The power supply circuit further includes an electronic control module, the power battery pack is connected to the cooling system via the main switch and the switch tube, and the control method further includes: In the event that thermal runaway occurs in any of the power supply modules, the switch tube away from the closed main switch is controlled to be turned on, and the switch tube close to the closed main switch is controlled to be turned off, so that the power supply module that has not experienced thermal runaway can supply power to the cooling system.

8. The control method according to claim 1, characterized in that: The main switch and the branch switch are both relays.

9. The control method according to claim 1, characterized in that: In the case where any power supply module has thermal runaway, before disconnecting the main switch close to the power supply module having thermal runaway and closing the main switch away from the power supply module having thermal runaway and the branch switch on the branch connected to the power supply module having thermal runaway, the control method further includes: The temperature of the power supply module is detected in real time, and when the temperature of the power supply module exceeds a preset temperature threshold, it is determined that thermal runaway occurs in the power supply module.

10. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory is configured to store a computer program, and the processor implements the control method according to any one of claims 1 to 9 when executing the computer program.

11. A power supply circuit, characterized in that: The power supply circuit includes the electronic device according to claim 10, a power battery pack, a main switch, a branch switch and a cooling system; The power battery pack is connected to the cooling system through the main switch. The power battery pack includes at least two power supply modules. Adjacent power supply modules are connected to the cooling system through branches, and the branch switches are provided on the branches.

12. The power supply circuit according to claim 11, characterized in that: The power supply circuit also includes an electronic control module and a motor. The electronic control module includes multiple switch tubes. The power battery pack is connected to the cooling system through the main switch, the switch tubes and the motor.

13. The power supply circuit according to claim 12, wherein: The motor has an inductor component therein, and the power battery pack is connected to the cooling system via the main switch, the switch tube and the inductor component.

14. The power supply circuit according to claim 11, wherein: The power supply circuit also includes an electronic control module, and the power battery pack is connected to the cooling system through the main switch and the switch tube.

15. The power supply circuit according to claim 11, characterized in that: The main switch and the branch switch are both relays.

16. A load circuit, characterized in that: The load circuit includes the electronic device of claim 10 or the power supply circuit of any one of claims 11-15.

17. A vehicle, characterized in that: The electronic device according to claim 10, the power supply circuit according to any one of claims 11 to 15, or the load circuit according to claim 16.

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