Control method and control apparatus for battery thermal anomaly

Abstract

A control method and control apparatus for a battery thermal anomaly, and an electric device. The method comprises: acquiring first state information, wherein the first state information comprises information for indicating that a thermal anomaly occurs in a battery (100); controlling the battery to power on or to maintain a powered-on state; acquiring second state information, wherein the second state information comprises information for indicating the state of an electric device, and the state of the electric device comprises a non-operating state or an operating state; and when the electric device is in the non-operating state, controlling the battery to discharge to a thermal management system (200) of the battery; or, when the electric device is in the operating state, controlling the battery to discharge to the thermal management system, and controlling the battery to discharge to a powertrain system of the electric device.

Description

Method and device for controlling battery thermal abnormality Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202411340598.9, filed on September 25, 2024, entitled “Method and device for controlling battery thermal abnormality”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, and more particularly, to a method and device for controlling battery thermal abnormality. BACKGROUND

[0003] Due to the advantages of high energy density, recyclable charging, safety, environmental protection, etc., batteries are widely used in new energy vehicles, consumer electronics, energy storage systems, etc.

[0004] Under the influence of overcharging, overdischarging, overheating, mechanical impact, etc., the internal temperature of the battery may continue to rise, which may cause the battery to be out of control. When one or more battery cells are out of control, heat will be transferred to adjacent battery cells, which may at any time cause a fire or explosion, etc. When the battery is out of control, the relay of the battery is usually disconnected to cut off the energy output of the battery to the outside, so as to reduce the continuous generation of heat. However, this processing method reduces the temperature of the battery slowly, which still easily causes a fire or explosion, etc. SUMMARY

[0005] The embodiments of the present application provide a method and device for controlling battery thermal abnormality. When the battery is abnormal, the state of the electric device is considered to determine the discharge object of the battery, so that the battery can be quickly and effectively cooled, and the user experience can be improved.

[0006] In a first aspect, a method for controlling battery thermal abnormality is provided. The method includes: obtaining first state information, the first state information including information indicating that the battery is abnormal; controlling the battery to be powered on or to remain in a powered-on state; obtaining second state information, the second state information including information indicating a state of an electric device, the state of the electric device including a non-running state or a running state; in a case where the electric device is in the non-running state, controlling the battery to discharge to a thermal management system; or in a case where the electric device is in the running state, controlling the battery to discharge to the thermal management system and controlling the battery to discharge to a power system of the electric device.

[0007] In the embodiments of the present application, when the battery has a thermal abnormality, the state of the electric device is considered. In the case that the battery has a thermal abnormality and the electric device is in a non-running state, the battery can be controlled to discharge to the thermal management system to rapidly cool and dissipate heat of the battery, so that the battery can rapidly change from the thermal abnormality state to a relatively stable state, and the possibility of fire, explosion and other dangerous situations caused by the thermal abnormality of the battery is reduced. In the case that the battery has a thermal abnormality and the electric device is in a running state, the battery can be cooled to make the battery as stable as possible, and the reaction time for the user to operate the electric device and to transfer from the electric device to a relatively safe position is given, so that the loss of the user is reduced and the user experience is improved.

[0008] In a possible implementation, the method further includes: obtaining third state information, the third state information including information indicating that the battery changes from the thermal abnormality state to a thermal stable state; and controlling the battery to power off.

[0009] In the embodiments of the present application, when the battery has a thermal abnormality and the electric device is in a non-running state, the battery is controlled to discharge to the thermal management system to dissipate and cool the battery. When the battery changes from the thermal abnormality state to the thermal stable state, the battery is controlled to power off, so that subsequent processing of the battery is facilitated.

[0010] In a possible implementation, the method further includes: obtaining third state information and fourth state information, the third state information including information indicating that the battery changes from the thermal abnormality state to the thermal stable state, and the fourth state information including information indicating that the electric device changes from the running state to the non-running state; and controlling the battery to power off.

[0011] In the embodiments of the present application, when the battery has a thermal abnormality and the electric device is in a running state, the battery is controlled to discharge to the thermal management system and the power system of the electric device. The thermal management system can cool the battery, and the electric device can continue to run. When the state of the battery changes from the thermal abnormality state to a relatively stable state and the state of the electric device changes from the running state to the non-running state, the battery is controlled to power off, and the electrical connection between the battery and the thermal management system and the power system of the electric device is disconnected. In this way, the possibility of fire, explosion and other dangerous situations caused by the thermal abnormality of the battery is reduced, and the power system is powered off when the electric device is in a non-running state, for example, the vehicle is in a stopped state, instead of being suddenly powered off when the electric device is running, so that the loss of the user is reduced and the user experience is improved.

[0012] In a possible implementation, the battery is controlled to discharge to the thermal management system, including: controlling the battery to discharge to a first load of the thermal management system.

[0013] In the embodiments of the present application, the battery can be controlled to discharge to the first load of the thermal management system, so that the first load is used to dissipate and cool the battery.

[0014] In a possible implementation, the method further includes: controlling the low-voltage power supply of the electrical device to discharge the second load of the thermal management system.

[0015] In the embodiments of the present application, the battery can be controlled to discharge to the low-voltage power supply, and then the low-voltage power supply can be controlled to discharge to the second load of the thermal management system, so that the second load is used to cool and dissipate heat of the battery.

[0016] In a possible implementation, the method further includes: in a case where the battery cannot be controlled to be powered on or in a powered-on state, controlling the low-voltage power supply of the electrical device to discharge the thermal management system.

[0017] In the embodiments of the present application, in a case where the battery cannot be controlled to be powered on or in a powered-on state, the low-voltage power supply can be used to discharge the thermal management system, so that the battery is cooled and dissipated, and the possibility of fire, explosion and other dangerous situations caused by thermal abnormalities of the battery is reduced.

[0018] In a possible implementation, the method further includes: controlling the low-voltage power supply of the electrical device to discharge the second load of the thermal management system.

[0019] In the embodiments of the present application, when the battery has a thermal abnormality, if the battery cannot be powered on, the low-voltage power supply of the electrical device can be used to discharge the second load of the thermal management system, so that the battery is cooled and dissipated.

[0020] In a possible implementation, before the battery is controlled to discharge to the thermal management system, the method further includes: determining an output power of the battery; and controlling the battery to discharge to the thermal management system includes: in a case where the output power of the battery is greater than or equal to a first power, controlling the battery to discharge to a load of a cooling liquid cooling system or a refrigerant cooling system, and the thermal management system includes the cooling liquid cooling system or the refrigerant cooling system.

[0021] In the embodiments of the present application, in a case where the output power of the battery is greater than or equal to the first power, the battery is controlled to discharge to the cooling liquid cooling system or the refrigerant cooling system, so that the cooling time of the cooling liquid cooling system or the refrigerant cooling system is increased, and the battery can be quickly and effectively cooled and dissipated.

[0022] In some embodiments, before the battery is controlled to discharge to the thermal management system, the method further includes: determining an output power of the battery; and the method further includes: in a case where the output power of the battery is less than or equal to a first power, controlling the low-voltage power supply of the electrical device to discharge to a cooling liquid cooling system or a refrigerant cooling system, and the thermal management system includes the cooling liquid cooling system or the refrigerant cooling system.

[0023] In the embodiment of the present application, when the output power of the battery is relatively small, the battery can not meet the operation requirement of the thermal management system, and the low-voltage power supply of the power consumption device can be used to discharge the cooling liquid cooling system to cool and heat dissipate the battery.

[0024] In a possible implementation, before discharging the battery to the thermal management system, the method further includes: determining the output power of the battery; and discharging the battery to the thermal management system, including: discharging the battery to the load of the cooling liquid cooling system when the output power of the battery is greater than or equal to the first power and less than or equal to the second power; or discharging the battery to the load of the refrigerant cooling system when the output power of the battery is greater than or equal to the second power, and the thermal management system includes the cooling liquid cooling system and the refrigerant cooling system.

[0025] In the embodiment of the present application, when the output power of the battery is between the first power and the second power, the battery is discharged to the cooling liquid cooling system; and when the output power of the battery is less than or equal to the second power, the battery is discharged to the load of the refrigerant system. In this way, when the output power of the battery is different, whether to discharge the battery to the cooling liquid system or the refrigerant system can be considered, the working time of the thermal management system is increased, and the cooling efficiency and cooling effect of the battery are improved, so that the battery can be quickly and effectively cooled and heat dissipated.

[0026] In a possible implementation, before discharging the battery to the thermal management system, the method further includes: determining the output power of the battery; and the method further includes: discharging the low-voltage power supply of the power consumption device to the load of the cooling liquid cooling system when the output power of the battery is less than or equal to the first power, and the thermal management system includes the cooling liquid cooling system and the refrigerant cooling system.

[0027] In the embodiment of the present application, when the output power of the battery is relatively small, the battery can not meet the operation requirement of the thermal management system, and the low-voltage power supply of the power consumption device can be used to discharge the cooling liquid cooling system to cool and heat dissipate the battery.

[0028] In a possible implementation, the low-voltage power supply is discharged to an over-discharged state.

[0029] In the embodiment of the present application, when the low-voltage power supply is discharged to the thermal management system, the storage capacity of the low-voltage power supply is low, and therefore, the low-voltage power supply can be controlled to be over-discharged, the working time of the thermal management system such as the flow and circulation time of the cooling liquid is increased, and the battery can be rapidly and continuously heat dissipated and cooled.

[0030] In a possible implementation, before controlling the battery to be powered on, the method further includes: determining that the battery is in a non-charging state, wherein the first state information further includes information indicating that the battery is in a charging state or a non-charging state; or in a case where the battery is in the charging state, controlling the battery to stop charging.

[0031] In the embodiments of the present application, before controlling the battery to discharge to the thermal management system, it is necessary to determine whether the battery is charging. If the battery is charging, it is necessary to stop charging first. For example, for a lithium battery, charging and discharging cannot be performed simultaneously, and therefore, if the battery is to discharge to the thermal management system, it is necessary to stop charging of the battery first to meet the use requirements of the battery.

[0032] In a second aspect, a device for controlling thermal abnormality of a battery is provided, and the device includes: an acquisition unit configured to acquire first state information, the first state information including information indicating that the battery has a thermal abnormality; a control unit configured to control the battery to be powered on or to remain in a powered-on state; the acquisition unit is configured to acquire second state information, the second state information including information indicating a state of an electrical device, the state of the electrical device including a non-running state or a running state; the control unit is configured to, in a case where the electrical device is in the non-running state, control the battery to discharge to a thermal management system; or in a case where the electrical device is in the running state, control the battery to discharge to the thermal management system and to discharge to a power system of the electrical device.

[0033] In a possible implementation, the acquisition unit is configured to acquire third state information, the third state information including information indicating that the battery changes from a thermal abnormality state to a thermal stability state; and the control unit is configured to control the battery to be powered off.

[0034] In a possible implementation, the acquisition unit is configured to acquire third state information and fourth state information, the third state information including information indicating that the battery changes from a thermal abnormality state to a thermal stability state, and the fourth state information including information indicating that the electrical device changes from a running state to a non-running state; and the control unit is configured to control the battery to be powered off.

[0035] In a possible implementation, the control unit is configured to control the battery to discharge to a first load of the thermal management system.

[0036] In a possible implementation, the control unit is configured to control the battery to discharge to a low-voltage power supply of the electrical device, and to control the low-voltage power supply to discharge to a second load of the thermal management system.

[0037] In a possible implementation, the control unit is configured to, in a case where the battery cannot be controlled to be powered on or to be in a powered-on state, control a low-voltage power supply of the electrical device to discharge to the thermal management system.

[0038] In a possible implementation, the control unit is configured to control the low-voltage power supply of the electrical equipment to discharge to the second load of the thermal management system.

[0039] In a possible implementation, the control unit is configured to: determine the outputtable power of the battery; and control the battery to discharge to the load of the coolant cooling system or the refrigerant cooling system in a case where the outputtable power of the battery is greater than or equal to the first power, the thermal management system comprising the coolant cooling system or the refrigerant cooling system.

[0040] In some embodiments, the control unit is configured to: determine the outputtable power of the battery; and control the low-voltage power supply of the electrical equipment to discharge to the coolant cooling system or the refrigerant cooling system in a case where the outputtable power of the battery is less than or equal to the first power, the thermal management system comprising the coolant cooling system or the refrigerant cooling system.

[0041] In a possible implementation, the control unit is configured to: determine the outputtable power of the battery; control the battery to discharge to the load of the coolant cooling system in a case where the outputtable power of the battery is greater than or equal to the first power and less than or equal to the second power; or control the battery to discharge to the load of the refrigerant cooling system in a case where the outputtable power of the battery is greater than or equal to the second power, the thermal management system comprising the coolant cooling system and the refrigerant cooling system.

[0042] In a possible implementation, the control unit is configured to: determine the outputtable power of the battery; and control the low-voltage power supply of the electrical equipment to discharge to the load of the coolant cooling system in a case where the outputtable power of the battery is less than or equal to the first power, the thermal management system comprising the coolant cooling system and the refrigerant cooling system.

[0043] In a possible implementation, the control unit is configured to control the low-voltage power supply to discharge to an over-discharge state.

[0044] In a possible implementation, the control unit is configured to: determine that the battery is in a non-charging state, wherein the first state information further comprises information indicating that the battery is in a charging state or a non-charging state; or control the battery to stop charging in a case where the battery is in the charging state.

[0045] In a third aspect, a control device for battery thermal abnormality is provided, the control device comprising a memory and a processor, the memory being configured to store instructions, and the processor being configured to read the instructions and perform the control method according to the first aspect and any possible implementation of the first aspect.

[0046] In a fourth aspect, an electrical equipment is provided, the electrical equipment comprising a battery, a thermal management system of the battery, and a control device according to the second aspect or any possible implementation of the second aspect.

[0047] In a fifth aspect, a chip is provided, comprising: a processor configured to invoke and run a computer program from a memory, so that a device installed with the chip performs the control method according to the first aspect or any possible implementation manner of the first aspect.

[0048] In a sixth aspect, a computer program is provided, when executed by a computer, causes the computer to implement the control method according to the first aspect or any possible implementation manner of the first aspect.

[0049] In a seventh aspect, a computer readable storage medium is provided, configured to store a computer program, when executed by a computer, causes the computer to implement the control method according to the first aspect or any possible implementation manner of the first aspect.

[0050] In an eighth aspect, a computer program product is provided, comprising computer program instructions, when executed by a computer, causes the computer to implement the control method according to the first aspect or any possible implementation manner of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0051] FIG. 1 is a schematic diagram of connection between a battery and a load of an electrical equipment according to an embodiment of the present application.

[0052] FIG. 2 is a schematic diagram of a liquid-cooled thermal management system according to an embodiment of the present application.

[0053] FIG. 3 is a flowchart of a control method of battery thermal abnormality according to an embodiment of the present application.

[0054] FIG. 4 is a flowchart of a control method of battery thermal abnormality according to an embodiment of the present application.

[0055] FIG. 5 is a flowchart of a control method of battery thermal abnormality according to an embodiment of the present application.

[0056] FIG. 6 is a flowchart of a control method of battery thermal abnormality according to an embodiment of the present application.

[0057] FIG. 7 is a flowchart of a control method of discharging of a battery to a thermal management system according to an embodiment of the present application.

[0058] FIG. 8 is a flowchart of a control method of discharging of a battery to a thermal management system according to an embodiment of the present application.

[0059] FIG. 9 is a flowchart of a control method of battery thermal abnormality according to an embodiment of the present application.

[0060] FIG. 10 is a schematic block diagram of a control device of battery thermal abnormality according to an embodiment of the present application.

[0061] FIG. 11 is another schematic block diagram of the device for controlling thermal abnormality of a battery according to an embodiment of the present application. DETAILED DESCRIPTION

[0062] The embodiments of the present application will be further described below in conjunction with the accompanying drawings and examples. The detailed description and the accompanying drawings of the following examples are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, i.e., the present application is not limited to the described examples.

[0063] In the description of the embodiments of the present application, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0064] The term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents an "or" relationship between the front and rear associated objects.

[0065] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0066] Due to the advantages of high energy density, recyclable charging, safety and environmental protection, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0067] Under the influence of overcharging, overdischarging, overheating, mechanical impact and other factors, the temperature inside the battery may continue to rise, and then the battery may occur thermal abnormality. When one or more battery monomers occur thermal abnormality, heat will be transferred to adjacent battery monomers, which may at any time cause fire or explosion and the like.

[0068] When the battery occurs thermal abnormality, the relay of the battery is usually disconnected to cut off the energy output of the battery to the outside, so as to inhibit the continuous generation of heat. However, this processing method reduces the temperature of the battery slowly, and still easily causes the occurrence of fire or explosion and other dangerous situations.

[0069] Based on the above problems, the application provides a battery thermal abnormality control method and device. The control method comprises: obtaining first state information, the first state information comprising information indicating that the battery has a thermal abnormality; controlling the battery to be powered on or to maintain a powered-on state; obtaining second state information, the second state information comprising information indicating a state of the electric device, the state of the electric device comprising a non-running state or a running state; in the case that the electric device is in the non-running state, controlling the battery to discharge to a thermal management system of the battery; or in the case that the electric device is in the running state, controlling the battery to discharge to the thermal management system, and controlling the battery to discharge to a power system of the electric device.

[0070] The battery thermal abnormality control method and device provided by the embodiments of the application can quickly and effectively cool the battery when the battery has a thermal abnormality, and improve user experience.

[0071] FIG. 1 is a schematic diagram of connection between a battery and a load of an electric device to which the embodiments of the application are applicable.

[0072] The battery 100 comprises at least one battery cell. For example, as shown in FIG. 1, the battery 100 comprises battery cells 111 to 11n. In the present application, the battery can also be referred to as a battery pack.

[0073] To meet different use requirements, the plurality of battery cells can be connected in series, in parallel or in a mixed manner, wherein the mixed manner refers to a mixture of series connection and parallel connection. In some embodiments, the plurality of battery cells can be connected in series, in parallel or in a mixed manner to form a battery module, and a plurality of battery modules are connected in series, in parallel or in a mixed manner to form a battery. That is, the plurality of battery cells can be directly connected to form a battery, or the plurality of battery cells can be connected to form a battery module first, and then the battery module is connected to form a battery.

[0074] In some embodiments, the battery 100 comprises a relay S connected with the battery cells, for controlling power-on and power-off of the battery 100. When the relay S is closed, the battery 100 is powered on, thereby realizing high-voltage connection between the battery and the electric device, and the battery can discharge to the electric device; when the relay S is opened, the battery 100 is powered off, thereby disconnecting the high-voltage connection between the battery 100 and the electric device, and the battery stops discharging to the high-voltage device.

[0075] Optionally, in some embodiments, the main positive relay, the main negative relay, the pre-charge relay and the pre-charge resistor can be used to control the power-on and power-off of the battery. For example, the main negative relay and the pre-charge relay can be closed first to perform the high-voltage pre-charge. When the pre-charge process is completed, the main positive relay can be closed, and then the pre-charge relay is disconnected after a delay, thereby realizing the high-voltage connection between the battery system and the electrical equipment, that is, the power-on of the battery. For another example, the high-voltage connection between the battery system and the electrical equipment can be disconnected by sequentially disconnecting the main positive relay and the main negative relay, that is, the power-off of the battery.

[0076] In some embodiments, the battery 100 includes a battery management system (BMS) 120. The BMS 120 can collect and calculate parameters such as the current, voltage, temperature or state of charge (SOC) of the battery 100, and then control the charging and discharging of the battery 100 to manage the battery 100.

[0077] In some embodiments, the battery 100 includes a first total output pole 131 and a second total output pole 132, which are connected across the load of the electrical equipment to realize the discharging of the battery 100 to the load.

[0078] In some embodiments, one end of the load can be connected to one end of a switch, and the other ends of the switch and the load are connected to the first total output pole 131 and the second total output pole 132, respectively. In this way, when the battery 100 is powered on, the power-on of each load can be controlled independently. For example, as shown in FIG. 1, one end of the first switch S1 is connected to one end of the first load M1, and the other ends of the first switch S1 and the first load M1 are connected to the first total output pole 131 and the second total output pole 132, respectively. One end of the second switch S2 is connected to one end of the second load M2, and the other ends of the second switch S2 and the second load M2 are connected to the first total output pole 131 and the second total output pole 132, respectively. One end of the third switch S3 is connected to one end of the third load M3, and the other ends of the third switch S3 and the third load M3 are connected to the first total output pole 131 and the second total output pole 132, respectively. When the battery 100 is powered on, the power-on and power-off of the first load M1, the second load M2 and the third load M3 can be controlled independently by closing and opening the first switch S1, the second switch S2 and the third switch S3.

[0079] In the embodiments of the present application, the load can be a thermal management system, or can be a certain device of the thermal management system, or can be low-voltage electricity of the electrical equipment, and the like.

[0080] It should be understood that the various components shown in FIG. 1 are merely examples, and in actual applications, the various components described above can have different names, or the components described above can be added or deleted according to actual needs.

[0081] The power consuming device mentioned in the embodiments of the present application can refer to a vehicle, such as a battery car, an electric vehicle, etc. The power consuming device mentioned in the embodiments of the present application can also be other devices using a battery, such as a mobile phone, a portable device, a notebook computer, an electric toy, an electric tool, a ship, and a spacecraft, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the above described devices, but can also be applied to all devices using a battery.

[0082] FIG. 2 is a schematic diagram of a liquid-cooled thermal management system suitable for the embodiments of the present application.

[0083] The thermal management system 200 can manage the temperature of the battery 100, and achieve cooling or heating of the battery 100. In the case that the temperature of the battery 100 is too high, the thermal management system 200 can absorb and take away the heat of the battery 100, and achieve cooling of the battery 100; in the case that the temperature of the battery 100 is too low, the thermal management system 200 can provide heat to the battery 100, and achieve heating of the battery 100.

[0084] The thermal management system 200 includes a compressor 210, a condenser 220, an evaporator 230, a refrigerant circuit 240, a pump 250, a coolant circuit 260, a multi-way valve 270, etc.

[0085] The compressor 210 is a driven fluid machine that lifts low-pressure gas to high-pressure gas. The suction port of the compressor 210 sucks in low-pressure gaseous refrigerant, and after the low-pressure gaseous refrigerant is compressed by the motor operation to drive the piston, the high-pressure gaseous refrigerant is discharged from the exhaust port, providing power for the phase change cycle of the refrigerant.

[0086] The condenser 220 is a device that can convert gas or vapor into liquid (gas-liquid conversion). The high-pressure gaseous refrigerant is converted into high-pressure liquid refrigerant through the condenser 220, and the heat emitted during the gas-liquid conversion is quickly transferred to the external environment such as air medium.

[0087] The evaporator 230 is a device that can convert liquid substances into gas. The liquid refrigerant exchanges heat with the outside air through the evaporator 230, and becomes gaseous refrigerant. In the process of refrigerant vaporization, the heat of the surrounding air is absorbed.

[0088] The pump 250 is used to transmit mechanical energy or other external energy to the coolant, so that the energy of the coolant is increased, and the flow speed and pressure of the coolant are accelerated.

[0089] The working principle of the multi-way valve 270 is to connect different fluid channels to each other by rotating the valve core, so as to switch different flow channels for the coolant.

[0090] In some embodiments, the thermal management system 200 can further include an expansion valve.

[0091] The expansion valve is used to release the pressure of the high-pressure liquid refrigerant, and the refrigerant after being released is cooled and converted into low-pressure liquid refrigerant. The expansion valve can decompress (or release or throttle) the input high-pressure liquid refrigerant, thereby obtaining low-pressure liquid refrigerant. The expansion valve can also be referred to as an electronic expansion valve, a thermal expansion valve, or a throttle valve.

[0092] In some embodiments, the expansion valve is installed at the inlet of the evaporator 230. The expansion valve can function to throttle and control the flow of the refrigerant.

[0093] For example, to cool the battery 100 again, the compressor 210 can compress the low-pressure gaseous refrigerant into high-pressure gaseous refrigerant and discharge it, and the high-pressure gaseous refrigerant flows into the condenser 220 through the refrigerant flow channel. The condenser 220 converts the high-pressure gaseous refrigerant into high-pressure liquid refrigerant, which is then released by the expansion valve and converted into low-pressure liquid refrigerant, which flows into the evaporator 230 through the refrigerant flow channel. On the other hand, under the action of the pump 250, the high-temperature coolant flowing through the battery 100 passes through the multi-way valve 270 and flows into the evaporator 230, and the high-temperature coolant exchanges heat with the low-pressure liquid refrigerant, and the high-temperature coolant releases heat and is converted into low-temperature coolant, and the low-pressure liquid refrigerant absorbs heat and is converted into low-pressure gaseous refrigerant. The low-pressure gaseous refrigerant can continue to flow into the compressor for compression through the refrigerant flow channel, thereby completing the circulation process of the refrigerant; the low-temperature coolant flows into the battery 100 through the multi-way valve 270 to cool the battery 100, thereby completing the circulation process of the coolant.

[0094] The thermal management system 200 shown in FIG. 2 is a battery cooling system using a refrigerant cooling system. The refrigerant cooling system mainly uses refrigerant as a medium to cool the battery. As an example, the refrigerant can directly flow through the battery to cool the battery. The refrigerant cooling system can include a compressor 210, a condenser 220, an evaporator 230, an expansion valve, a refrigerant circuit 240, etc. As another example, the battery can be cooled by heat exchange between the refrigerant and the coolant flowing through the battery. The refrigerant cooling system can also include a pump 250, etc., which is used to control the flow rate and pressure of the coolant.

[0095] In some embodiments, the thermal management system 200 can cool the battery by using a cooling liquid cooling system, mainly by using the circulation of the cooling liquid to take away the heat of the battery. For example, the thermal management system can include a cooling liquid system, which includes a pump, a heat dissipation device such as a heat dissipation water tank, a cooling liquid flow channel, etc. For example, the high-temperature cooling liquid flowing through the battery 100, under the action of the pump, flows to the heat dissipation water tank, exchanges heat with the external environment through the heat dissipation water tank, and the high-temperature cooling liquid is converted into low-temperature cooling liquid, and then continues to flow to the battery 100.

[0096] In some embodiments, the thermal management system 200 can include a refrigerant cooling system and a cooling liquid cooling system.

[0097] It should be understood that the various components shown in FIG. 2 are only an example, and in actual applications, the above-mentioned components can have different names, or the above-mentioned components can be added or deleted according to actual needs.

[0098] FIG. 3 is a flow diagram of a battery thermal abnormality control method provided by an embodiment of the present application. The battery thermal abnormality control method shown in FIG. 3 is applicable to the power consumption device of FIG. 1 and the thermal management system of FIG. 2.

[0099] 310, obtaining first state information.

[0100] The first state information includes information indicating that the battery has a thermal abnormality.

[0101] The battery thermal abnormality can refer to an abnormal increase in the temperature and / or temperature rise rate of the battery. For example, during the use of the battery, due to some reasons such as excessive charging and discharging, collision, internal short circuit of the battery, etc., the temperature and / or temperature rise rate of the battery may abnormally increase, for example, leading to that the battery is about to have thermal runaway, is likely to have thermal runaway, or has thermal runaway, etc.

[0102] For example, whether the battery has a thermal abnormality can be determined by at least one of the parameter information of the battery, such as the current, voltage, temperature, pressure, or smoke concentration in the battery, etc. In the case that the parameter information of the battery is within a preset range, it is considered that the battery has a thermal abnormality.

[0103] For example, the voltage of each battery monomer can be monitored by a low-voltage monitoring system, and a sensor is arranged every few battery monomers to monitor the temperature of the battery monomer, and whether a thermal abnormality occurs is determined by the change of the temperature and voltage of the battery.

[0104] For example, the BMS can determine whether the battery has a thermal abnormality according to the parameter information of the battery, and when the battery has a thermal abnormality, the BMS can send an indication signal to the vehicle control unit (VCU), so that the VCU can obtain the first state information indicating that the battery has a thermal abnormality.

[0105] For example, the BMS is responsible for monitoring the temperature and voltage of the battery cells, and determining whether a thermal abnormality occurs according to the temperature change and the voltage change. When it is determined that a thermal abnormality occurs in a battery cell, the BMS can send an indication signal to the VCU.

[0106] 320, controlling the battery to be powered on or to keep powered on.

[0107] For example, the VCU can send indication information to the BMS for controlling the battery to be powered on or to keep powered on.

[0108] If the battery is in a powered-off state, the battery is controlled to be powered on. For example, if a thermal abnormality occurs in the battery when the battery is charging, the battery needs to be controlled to be powered on, such as controlling the relay S in FIG. 1 to be closed.

[0109] If the battery is in a powered-on state, the battery is controlled to keep powered on. For example, if a thermal abnormality occurs in the battery when the battery is in a powered-on state, such as when the vehicle is driving, the battery is controlled to continue to keep powered on, such as controlling the relay S in FIG. 1 to continue to keep closed.

[0110] 330, obtaining second state information.

[0111] The second state information includes information for indicating that the electrical equipment is in a running state or a non-running state.

[0112] For example, the electrical equipment is in a running state, i.e., the power system of the electrical equipment is in a running state. For example, the power system of the vehicle, such as the motor, the steering pump, etc., is in a running state, and the vehicle is driving.

[0113] For example, the electrical equipment is in a non-running state, i.e., the power system of the electrical equipment is in a non-running state. For example, the power system of the vehicle, such as the engine, is in a non-starting state or a starting and non-running state, and the vehicle is stationary. For another example, the vehicle is in a charging state.

[0114] 340a, controlling the battery to discharge to the thermal management system in a case where the electrical equipment is in a non-running state.

[0115] In the embodiment of the present application, when a thermal abnormality occurs in the battery, the battery temperature is too high, and the thermal management system can cool the battery. That is, when a thermal abnormality occurs in the battery, the battery discharges to the thermal management system, so that the thermal management system works to cool the battery.

[0116] When a thermal abnormality occurs in the battery, the battery is controlled to be powered on or to keep powered on, so as to realize the energy output of the battery to the thermal management system.

[0117] For example, in a case where the electrical equipment is in a charging state, the battery is controlled to only discharge to the thermal management system.

[0118] In the embodiment of the present application, in the case that the battery has thermal abnormality and the electric device is in a non-running state, the battery can be controlled to discharge to the thermal management system, so as to rapidly cool and dissipate heat of the battery, and the battery can rapidly change from the thermal abnormality state to a relatively stable state, thereby reducing the possibility of fire, explosion and other dangerous conditions caused by the thermal abnormality of the battery.

[0119] 340b, in the case that the electric device is in a running state, the battery is controlled to discharge to the thermal management system and the power system of the electric device.

[0120] The power system of the electric device is used to drive the electric device to run. Taking a vehicle as an example, the power system includes a load used to drive the vehicle to run, which can include a motor controller, an electric air pump, an electric steering pump and the like.

[0121] When the battery has thermal abnormality, in the case that the electric device is in a running state, the battery is controlled to discharge to the thermal management system and the power system of the electric device, so as to cool the battery and enable the electric device to run at the same time. For example, when the battery has thermal abnormality and the vehicle is running, the battery is cooled, and at the same time, the user can drive the vehicle to a relatively safe position and control the vehicle to slow down and stop, and the user can move from the vehicle to a relatively safe position.

[0122] In the embodiment of the present application, when the battery has thermal abnormality, the discharge object of the battery can be determined according to the state of the electric device. In this way, when the battery has thermal abnormality, the state of the electric device is considered, the battery can be cooled to make the battery as stable as possible, and the user is given a reaction time to operate the electric device and move from the electric device to a relatively safe position, thereby reducing the loss of personal and property safety of the user and improving the user experience.

[0123] FIG. 4 is a flowchart of a battery thermal abnormality control method provided by an embodiment of the present application.

[0124] 410, first state information is acquired.

[0125] The first state information includes information used to indicate that the battery has thermal abnormality.

[0126] 420, the battery is controlled to be powered on or remain in a powered-on state.

[0127] 430, second state information is acquired.

[0128] The second state information includes information used to indicate that the electric device is in a running state or a non-running state.

[0129] 440a, in the case that the electric device is in a non-running state, the battery is controlled to discharge to the thermal management system.

[0130] 450a, obtaining the third state information.

[0131] The third state information includes information indicating that the battery changes from the thermal abnormal state to the thermal stable state.

[0132] The thermal stable state can refer to that the temperature of the battery is below a certain value and tends to be stable.

[0133] For example, in a case where the parameter information of the battery is within the preset range, it is considered that the battery is in thermal abnormality. Then, in a case where the parameter information of the battery changes from within the preset range to outside the preset range, it is considered that the battery changes from the thermal abnormal state to the thermal stable state.

[0134] For example, the BMS is responsible for monitoring the temperature and voltage of the battery monomer, and determining whether the battery changes from the thermal abnormal state to the thermal stable state according to the temperature change and the voltage change. When it is determined that the battery changes from the thermal abnormal state to the thermal stable state, the BMS can send an indication signal to the VCU, so that the VCU can obtain the third state information.

[0135] 460a, controlling the battery to power off.

[0136] In the embodiment of the present application, when the battery is in thermal abnormality and the electric device is in a non-running state, the battery is controlled to discharge to the thermal management system to dissipate heat and cool the battery. When the battery changes from the thermal abnormal state to the thermal stable state, the battery is controlled to power off, facilitating subsequent processing of the battery.

[0137] 440b, in a case where the electric device is in a running state, controlling the battery to discharge to the power system of the thermal management system and the electric device.

[0138] The contents of steps 410 to 440 can refer to the related description of steps 310 to 340, which will not be repeated here.

[0139] 450b, obtaining the third state information and the fourth state information.

[0140] The third state information includes information indicating that the battery changes from the thermal abnormal state to the thermal stable state. The fourth state information includes information indicating that the electric device changes from the running state to the non-running state.

[0141] For example, in a case where the parameter information of the battery is within the preset range, it is considered that the battery is in thermal abnormality. Then, in a case where the parameter information of the battery changes from within the preset range to outside the preset range, it is considered that the battery changes from the thermal abnormal state to the thermal stable state.

[0142] For example, the BMS is responsible for monitoring the temperature and voltage of the battery monomer, and determining whether the battery changes from a thermal abnormal state to a thermal stable state according to the temperature change and the voltage change. When it is determined that the battery changes from the thermal abnormal state to the thermal stable state, the BMS can send an indication signal to the VCU, so that the VCU can obtain the third state information.

[0143] The description of the battery in the non-operation state can refer to the related content above, which will not be repeated here.

[0144] When the battery is in a thermal abnormality and the electrical equipment is in an operation state, the battery is controlled to discharge to the thermal management system and the power system of the electrical equipment. The thermal management system can cool the battery to make the battery tend to be in a more stable state as much as possible, and the electrical equipment can continue to operate. The user can drive the vehicle to a relatively safe position and control the vehicle to slow down to stop, so that the electrical equipment changes from the operation state to the non-operation state, thereby obtaining the information that the battery changes from the operation state to the non-operation state.

[0145] 460b, control the battery to power off.

[0146] In the embodiment of the present application, when the battery is in a thermal abnormality and the electrical equipment is in an operation state, the battery is controlled to discharge to the thermal management system and the power system of the electrical equipment. The thermal management system can cool the battery, and the electrical equipment can continue to operate. When the battery changes from the thermal abnormal state to a more stable state and the electrical equipment changes from the operation state to the non-operation state, the battery is controlled to power off, and the electrical connection between the battery and the thermal management system and the power system of the electrical equipment is disconnected. In this way, the possibility of fire, explosion and other dangerous situations caused by the thermal abnormality of the battery is reduced, and the power system is powered off when the electrical equipment is in a non-operation state, such as when the vehicle is in a stopped state, rather than suddenly powered off when the electrical equipment is operating, thereby reducing the loss of the user and improving the user experience.

[0147] FIG. 5 is a flowchart of a battery thermal abnormality control method provided by an embodiment of the present application.

[0148] 510, obtain first state information.

[0149] The first state information includes information for indicating that the battery is in a thermal abnormality.

[0150] 520, control the battery to power on or keep the powered-on state.

[0151] 530, obtain second state information.

[0152] The second state information includes information for indicating that the electrical equipment is in an operation state or a non-operation state.

[0153] The content of steps 510 to 530 can refer to the related description of steps 310 to 330, and the present application does not repeat here.

[0154] 540a-1, in the case where the electrical equipment is in a non-running state, controlling the battery to discharge to a first load of the thermal management system.

[0155] In some embodiments, the first load can be a load powered by high voltage, that is, the battery can directly discharge to the first load without the energy transfer of other power sources such as low voltage power sources. For example, the battery can discharge to the first load through a direct current / direct current (DC / DC) converter. For example, the first load can include a compressor.

[0156] In some embodiments, all loads of the thermal management system can be first loads, or part of the loads of the thermal management system are first loads.

[0157] In the embodiments of the present application, the battery can be controlled to discharge to the first load of the thermal management system, so as to dissipate and cool the battery by the first load.

[0158] 540a-2, in the case where the electrical equipment is in a non-running state, controlling the battery to discharge to a low voltage power source of the electrical equipment, and controlling the low voltage power source to discharge to a second load of the thermal management system.

[0159] In some embodiments, the second load can be a load powered by low voltage, that is, the battery needs to discharge to the second load through the low voltage power source. For example, the battery can discharge to the low voltage power source through a direct current / direct current (DC / DC) converter, and the low voltage power source discharges to the second load. For example, the second load can include a water pump.

[0160] In some embodiments, all loads of the thermal management system can be second loads, or part of the loads of the thermal management system are second loads.

[0161] In the embodiments of the present application, the battery can be controlled to discharge to the low voltage power source, and then the low voltage power source is controlled to discharge to the second load of the thermal management system, so as to dissipate and cool the battery by the second load.

[0162] 540b-1, in the case where the electrical equipment is in a running state, controlling the battery to discharge to a first load of the thermal management system.

[0163] 540b-2, in the case where the electrical equipment is in a running state, controlling the battery to discharge to a low voltage power source of the electrical equipment, and controlling the low voltage power source to discharge to a second load of the thermal management system.

[0164] 540b-3, in the case that the electrical device is in the running state, controlling the battery to discharge to the power system of the electrical device.

[0165] The content of the first load and the second load in 530b can refer to the related description in 530a, which will not be repeated here.

[0166] FIG. 6 is a flow diagram of a battery thermal abnormality control method provided by an embodiment of the present application.

[0167] 610, obtaining first state information.

[0168] The first state information includes information indicating that the battery has a thermal abnormality.

[0169] 620a, controlling the battery to be powered on or to be in a powered-on state.

[0170] 630a, obtaining second state information.

[0171] The second state information includes information indicating that the electrical device is in a running state or a non-running state.

[0172] 640a-1, in the case that the electrical device is in the non-running state, controlling the battery to discharge to the thermal management system.

[0173] 640a-2, in the case that the electrical device is in the running state, controlling the battery to discharge to the thermal management system, and controlling the battery to discharge to the power system of the electrical device.

[0174] The description of steps 610, 620a to 640a can refer to the related content of steps 310 to 340, which will not be repeated here.

[0175] 620b, in the case that the battery cannot be controlled to be powered on or to be in a powered-on state, controlling the low-voltage power supply of the electrical device to discharge to the thermal management system.

[0176] In some embodiments, due to hardware failure such as relay damage, the relay cannot be closed, and the battery cannot be powered on or in a powered-on state.

[0177] The battery cannot be powered on or in a powered-on state, so the battery cannot discharge to the thermal management system. At this time, the low-voltage power supply can be used to discharge to the thermal management system.

[0178] In the embodiments of the present application, in the case that the battery cannot be controlled to be powered on or to be in a powered-on state, the low-voltage power supply can be used to discharge to the thermal management system, thereby cooling and cooling the battery, and reducing the possibility of fire, explosion and other dangerous situations caused by battery thermal abnormalities.

[0179] In some embodiments, the low-voltage power supply of the power-consuming device can be controlled to discharge the second load of the thermal management system.

[0180] The description of the second load can refer to the related content above, which will not be repeated here.

[0181] In some embodiments, the thermal management system includes the second load. For example, part of the load of the thermal management system is the second load. Of course, all the loads of the thermal management system can also be the second load.

[0182] In the embodiments of the present application, when the battery has a thermal anomaly, if the battery cannot be powered on, the low-voltage power supply of the power-consuming device can be used to discharge the second load of the thermal management system to dissipate and cool the battery.

[0183] In some embodiments, the low-voltage power supply of the power-consuming device can be controlled to discharge the second load of the thermal management system to an over-discharge state.

[0184] Over-discharge refers to continuous discharge when the discharge voltage reaches the discharge cutoff voltage. For example, when the discharge voltage of the battery is lower than 3.2V, the battery continues to discharge. Over-discharge can cause some problems such as battery aging and shortened life.

[0185] In the embodiments of the present application, when discharging the thermal management system by using the low-voltage power supply, the low-voltage power supply can over-discharge the thermal management system due to the low storage capacity of the low-voltage power supply, thereby increasing the working time of the thermal management system, such as the flow and circulation time of the cooling liquid, to rapidly and continuously dissipate and cool the battery.

[0186] In some embodiments, when discharging the battery to the thermal management system, the output power of the battery also needs to be considered. The control method of the battery thermal anomaly when considering the output power of the battery is exemplarily introduced below in combination with FIG. 7 and FIG. 8.

[0187] FIG. 7 is a flowchart of a control method of discharging the battery to the thermal management system according to an embodiment of the present application.

[0188] The thermal management system includes a cooling liquid cooling system or a refrigerant cooling system. The content of the cooling liquid cooling system and the refrigerant cooling system can refer to the related description in FIG. 2, which will not be repeated here.

[0189] 710, determine the output power of the battery.

[0190] When the battery has a thermal anomaly, before discharging the battery to the thermal management system or discharging the battery to the thermal management system and the driving system of the power-consuming device, the power that the battery can output needs to be determined.

[0191] 720a, in a case where the outputtable power of the battery is greater than or equal to the first power, controlling the battery to discharge to the coolant cooling system or the refrigerant cooling system.

[0192] In some embodiments, the thermal management system can only include the coolant cooling system, and in a case where the outputtable power of the battery is greater than or equal to a certain power, the battery can be controlled to discharge to a load of the coolant cooling system, such as a pump. For example, in a case where the electric device is in a non-running state, the first power can be set only by considering the operation of the coolant system. For another example, in a case where the electric device is in a running state, the first power can be set by comprehensively considering the operation of the coolant cooling system and the operation of the power system of the electric device.

[0193] Exemplarily, the thermal management system only includes the refrigerant cooling system, and in a case where the outputtable power of the battery is greater than or equal to a certain power, the battery can be controlled to discharge to a load of the refrigerant cooling system, such as a compressor, a pump and the like. Similarly, in a case where the electric device is in a non-running state, the first power can be set only by considering the operation of the refrigerant cooling system. For another example, in a case where the electric device is in a running state, the first power can be set by comprehensively considering the operation of the refrigerant cooling system and the operation of the power system of the electric device.

[0194] It should be understood that the first power of the thermal management system including the coolant cooling system can be the same as or different from the first power of the thermal management system including the refrigerant cooling system, and the present application does not limit this.

[0195] In the embodiments of the present application, in a case where the outputtable power of the battery is greater than or equal to the first power, the battery is controlled to discharge to the coolant cooling system or the refrigerant cooling system, which can increase the cooling time of the coolant cooling system or the refrigerant cooling system, and can quickly and effectively cool and dissipate heat of the battery.

[0196] 720b, in a case where the outputtable power of the battery is less than or equal to the first power, controlling the low-voltage power supply of the electric device to discharge to the coolant cooling system or the refrigerant cooling system.

[0197] Exemplarily, the thermal management system can include only the coolant cooling system, and in a case where the outputtable power of the battery is less than or equal to the first power, the low-voltage power supply of the electric device can be controlled to discharge to the coolant cooling system.

[0198] In the embodiments of the present application, in a case where the outputtable power of the battery is relatively small, the battery power cannot meet the operation requirement of the thermal management system, and the low-voltage power supply of the electric device can be used to discharge to the coolant cooling system to cool and dissipate heat of the battery.

[0199] FIG. 8 is a flow diagram of a control method of discharging the battery to the thermal management system according to an embodiment of the present application.

[0200] The thermal management system includes a coolant cooling system and a refrigerant cooling system. The content of the coolant cooling system and the refrigerant cooling system can refer to the related description of step 720, which will not be described here.

[0201] 810, determine the output power of the battery.

[0202] When the battery has a thermal anomaly, before the battery discharges to the thermal management system or the battery discharges to the thermal management system and the driving system of the electrical equipment, the power that the battery can output needs to be determined.

[0203] 820a, in the case that the output power of the battery is greater than or equal to the first power and less than or equal to the second power, control the battery to discharge to the coolant cooling system.

[0204] When the output power of the battery is between the first power and the second power, the battery can be controlled to discharge to the load of the coolant cooling system. At this time, the output power of the battery can discharge to the load of the coolant cooling system for a relatively long time, and the coolant cooling system can continuously cool the battery.

[0205] 820b, in the case that the output power of the battery is greater than or equal to the second power, control the battery to discharge to the refrigerant cooling system.

[0206] When the output power of the battery is greater than the second power, the output power of the battery is relatively large, and the battery can discharge to the load of the refrigerant cooling system for a relatively long time, and the refrigerant cooling system can continuously and more effectively cool the battery.

[0207] In the embodiments of the present application, in the case that the output power of the battery is between the first power and the second power, the battery is controlled to discharge to the coolant cooling system; in the case that the output power of the battery is less than or equal to the second power, the battery is controlled to discharge to the load of the refrigerant system. In this way, in the case that the output power of the battery is different, it is considered whether to discharge the battery to the coolant system or the refrigerant system, the working time of the thermal management system is increased, and the cooling efficiency and cooling effect of the battery are improved, so that the battery can be quickly and effectively cooled and heat-dissipated.

[0208] 820c, in the case that the output power of the battery is less than or equal to the first power, control the low-voltage power supply of the electrical equipment to discharge to the coolant cooling system.

[0209] In the case that the output power of the battery is less than or equal to the first power, the battery cannot meet the operation requirements of the thermal management system, such as the battery has insufficient energy to support the operation of the thermal management system, and the low-voltage power supply of the electrical equipment can be controlled to discharge to the load of the coolant cooling system.

[0210] In the embodiments of the present application, when the output power of the battery is small, the battery can not meet the operation requirement of the thermal management system, and the low-voltage power supply of the electric device can be used to discharge the cooling liquid cooling system to cool and dissipate heat of the battery.

[0211] FIG. 9 is a flowchart of a battery thermal abnormality control method provided by the embodiments of the present application.

[0212] 910, acquire first state information.

[0213] The first state information includes information indicating that the battery has a thermal abnormality and information indicating that the battery is in a charging state or a non-charging state.

[0214] In some embodiments, the BMS can determine whether the battery is in a charging state or a non-charging state. For example, the BMS can determine whether the battery is charging according to the voltage of the battery, and then the BMS can send the information indicating that the battery is in a charging state or a non-charging state to the VCU, so that the VCU can acquire the information indicating that the battery is in a charging state or a non-charging state.

[0215] Alternatively, when the battery is charging, the VCU can record, so that the VCU can also acquire the information indicating that the battery is in a charging state or a non-charging state.

[0216] 920a, determine that the battery is in a non-charging state.

[0217] 920b, control the battery to stop charging when the battery is in a charging state.

[0218] Before discharging the battery to the thermal management system, it is necessary to determine whether the battery is charging. If the battery is charging, the charging needs to be stopped first. For example, for a lithium battery, charging and discharging cannot be performed simultaneously, and therefore, if the battery is to be discharged to the thermal management system, the charging of the battery needs to be stopped first to meet the use requirement of the battery.

[0219] 930, acquire second state information.

[0220] The second state information includes information indicating that the electric device is in an operation state or a non-operation state.

[0221] 940a, control the battery to discharge to the thermal management system when the electric device is in a non-operation state.

[0222] 940b, control the battery to discharge to the thermal management system and the power system of the electric device when the electric device is in an operation state.

[0223] It should be understood that the size of the sequence number of the above processes does not mean the order of execution in various embodiments of the present application, and the execution order of the processes should be determined according to their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0224] The detection method of the battery system of the embodiments of the present application is described in detail above, and the control device of the battery system of the embodiments of the present application will be described in detail below in combination with FIG. 10 and FIG. 11. The technical features described in the method embodiments are applicable to the following device embodiments.

[0225] FIG. 10 is a schematic block diagram of a control device for battery thermal anomaly provided by the embodiments of the present application. As shown in FIG. 10, the control device 1000 includes the following parts or all of them.

[0226] The acquisition unit 1010 is configured to acquire first state information, the first state information including information indicating that the battery has a thermal anomaly; the control unit 1020 is configured to control the battery to be powered on or to remain in a powered-on state; the acquisition unit 1010 is configured to acquire second state information, the second state information including information indicating a state of an electric device, the state of the electric device including a non-running state or a running state; and the control unit 1020 is configured to control the battery to discharge to a thermal management system when the electric device is in the non-running state, or control the battery to discharge to the thermal management system and control the battery to discharge to a power system of the electric device when the electric device is in the running state.

[0227] In some embodiments, the acquisition unit 1010 is configured to acquire third state information, the third state information including information indicating that the battery changes from a thermal anomaly state to a thermal stable state; and the control unit 1020 is configured to control the battery to be powered off.

[0228] In some embodiments, the acquisition unit 1010 is configured to acquire third state information and fourth state information, the third state information including information indicating that the battery changes from a thermal anomaly state to a thermal stable state, and the fourth state information including information indicating that the electric device changes from a running state to a non-running state; and the control unit 1020 is configured to control the battery to be powered off.

[0229] In some embodiments, the control unit 1020 is configured to control the battery to discharge to a first load of the thermal management system.

[0230] In some embodiments, the control unit 1020 is configured to control the battery to discharge to a low-voltage power supply of an electric device, and control the low-voltage power supply to discharge to a second load.

[0231] In some embodiments, the control unit 1020 is configured to control the low-voltage power supply of the electrical device to discharge to the thermal management system in a case where the battery is unable to be powered on or is in a powered-on state.

[0232] In some embodiments, the control unit 1020 is configured to control the low-voltage power supply of the electrical device to discharge to a second load.

[0233] In some embodiments, the control unit 1020 is configured to: determine the outputtable power of the battery; and control the battery to discharge to a load of a cooling liquid cooling system or a refrigerant cooling system in a case where the outputtable power of the battery is greater than or equal to a first power, the thermal management system comprising the cooling liquid cooling system or the refrigerant cooling system.

[0234] In some embodiments, the control unit 1020 is configured to: determine the outputtable power of the battery; and control the low-voltage power supply of the electrical device to discharge to a cooling liquid cooling system or a refrigerant cooling system in a case where the outputtable power of the battery is less than or equal to a first power, the thermal management system comprising the cooling liquid cooling system or the refrigerant cooling system.

[0235] In some embodiments, the control unit 1020 is configured to: determine the outputtable power of the battery; control the battery to discharge to a load of a cooling liquid cooling system in a case where the outputtable power of the battery is greater than or equal to a first power and less than or equal to a second power; or control the battery to discharge to a load of a refrigerant cooling system in a case where the outputtable power of the battery is greater than or equal to the second power, the thermal management system comprising the cooling liquid cooling system and the refrigerant cooling system.

[0236] In some embodiments, the control unit 1020 is configured to: determine the outputtable power of the battery; and control the low-voltage power supply of the electrical device to discharge to a load of a cooling liquid cooling system in a case where the outputtable power of the battery is less than or equal to a first power, the thermal management system comprising the cooling liquid cooling system and the refrigerant cooling system.

[0237] In some embodiments, the control unit 1020 is configured to control the low-voltage power supply to discharge to an over-discharged state.

[0238] In some embodiments, the control unit 1020 is configured to determine that the battery is in a non-charging state, wherein the first state information further comprises information indicating that the battery is in a charging state or a non-charging state; or control the battery to stop charging in a case where the battery is in the charging state.

[0239] It should be understood that the above and other operations and / or functions of the various modules in the battery thermal anomaly control apparatus 1000 are for implementing corresponding flows in the various methods of FIGS. 3-9, which are not repeated here for brevity.

[0240] FIG. 11 shows a schematic block diagram of the battery thermal abnormality control apparatus 1000 according to an embodiment of the present application. As shown in FIG. 11, the control apparatus 1000 includes a processor 1110 and a memory 1120, where the memory 1120 is configured to store instructions, and the processor 1110 is configured to read the instructions and perform the method of various embodiments of the present application based on the instructions.

[0241] The memory 1120 can be a separate device independent of the processor 1110, or can be integrated in the processor 1110.

[0242] Optionally, as shown in FIG. 11, the battery thermal abnormality control apparatus 1000 can further include a transceiver 1130, and the processor 1110 can control the transceiver 1130 to communicate with other devices. Specifically, information or data can be sent to other devices, or information or data sent by other devices can be received.

[0243] It should be understood that the processor of the embodiments of the present application can be an integrated circuit chip having a processing capability of signals. In the implementation process, each step of the above method embodiments can be completed by integrated logic circuits of hardware in the processor or instructions in the form of software. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. Each method, step and logic block diagram disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.

[0244] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically eprom (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0245] Optionally, the embodiments of the present application further provide a use electric device, which comprises a battery, a thermal management system of the battery and the control device provided by the embodiments of the present application.

[0246] The embodiments of the present application further provide a computer readable storage medium for storing a computer program.

[0247] Optionally, the computer readable storage medium can be applied to the control device of the battery thermal anomaly in the embodiments of the present application, and the computer program makes the computer execute the corresponding process realized by the control device in the various methods of the embodiments of the present application when the computer program runs on the computer. For the sake of brevity, it will not be repeated here.

[0248] The embodiments of the present application further provide a computer program product comprising computer program instructions.

[0249] Optionally, the computer program product can be applied to the battery thermal abnormality control device in the embodiments of the present application, and the computer program instructions make the computer execute the corresponding processes implemented by the battery thermal abnormality control device in the various methods of the embodiments of the present application when the computer program instructions run on the computer. For brevity, details are not repeated here.

[0250] The embodiments of the present application further provide a computer program.

[0251] Optionally, the computer program can be applied to the battery thermal abnormality control device in the embodiments of the present application, and when the computer program runs on the computer, the computer executes the corresponding processes implemented by the battery thermal abnormality control device in the various methods of the embodiments of the present application. For brevity, details are not repeated here.

[0252] Those skilled in the art can clearly understand that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solutions. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0253] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, and details are not repeated here.

[0254] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the embodiments of the present application and each other can be through some interface, indirect coupling or communication connection between the devices or units, and can be electrical, mechanical or other forms.

[0255] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0256] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0257] The functions, if implemented in the form of software function units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in part, or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods according to the embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, and various other media that can store program codes.

[0258] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent substitutions can be made to the components thereof. In particular, each of the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method of controlling a thermal abnormality of a battery, characterized by, The method comprises: obtaining first state information, the first state information comprising information indicating that the battery is in a thermal abnormality; controlling the battery to be powered on or to remain in a powered-on state; obtaining second state information, the second state information comprising information indicating a state of the electrical device, the state of the electrical device comprising a non-operating state or an operating state; in a case where the electrical device is in the non-operating state, controlling the battery to discharge to a thermal management system of the battery; or, in a case where the electrical device is in the operating state, controlling the battery to discharge to the thermal management system and controlling the battery to discharge to a power system of the electrical device.

2. The control method according to claim 1, characterized by, The method further comprises: obtaining third state information, the third state information comprising information indicating that the battery changes from a thermal abnormality state to a thermal stability state; controlling the battery to be powered off.

3. The control method according to claim 1, characterized by, The method further comprises: obtaining third state information and fourth state information, the third state information comprising information indicating that the battery changes from a thermal abnormality state to a thermal stability state, and the fourth state information comprising information indicating that the electrical device changes from an operating state to a non-operating state; controlling the battery to be powered off.

4. The control method according to claim 1, characterized by, The controlling the battery to discharge to the thermal management system comprises: controlling the battery to discharge to a first load of the thermal management system.

5. The control method according to claim 1, characterized by, The controlling the battery to discharge to the thermal management system comprises: controlling the battery to discharge to a low-voltage power supply of the electrical device; and, controlling the low-voltage power supply to discharge to a second load of the thermal management system.

6. The control method according to claim 1, characterized by, The method further comprises: in a case where the battery cannot be controlled to be powered on or to remain in a powered-on state, controlling a low-voltage power supply of the electrical device to discharge to the thermal management system.

7. The control method according to claim 6, characterized by The controlling the low-voltage power supply of the electrical device to discharge to the thermal management system comprises: controlling the low-voltage power supply to discharge to a second load of the thermal management system.

8. The control method according to claim 1, characterized by, Before the controlling the battery to discharge to the thermal management system, the method further comprises: determining an outputtable power of the battery; The controlling the battery to discharge to the thermal management system comprises: in a case where the outputtable power of the battery is greater than or equal to a first power, controlling the battery to discharge to a cooling liquid cooling system or a refrigerant cooling system, the thermal management system comprising the cooling liquid cooling system or the refrigerant cooling system.

9. The control method according to claim 1, characterized by, Before the controlling the battery to discharge to the thermal management system, the method further comprises: determining an outputtable power of the battery; The method further comprises: in a case where the outputtable power of the battery is less than or equal to a first power, controlling a low-voltage power supply of the electrical device to discharge to a cooling liquid cooling system or a refrigerant cooling system, the thermal management system comprising the cooling liquid cooling system or the refrigerant cooling system.

10. The control method according to claim 1, characterized by, Before the controlling the battery to discharge to the thermal management system of the battery, the method further comprises: determining an outputtable power of the battery; The controlling the battery to discharge to the thermal management system comprises: in a case where the outputtable power of the battery is greater than or equal to a first power and less than or equal to a second power, controlling the battery to discharge to a cooling liquid cooling system; or, In a case where the outputtable power of the battery is greater than or equal to the second power, the battery is controlled to discharge to a refrigerant cooling system, and the thermal management system includes the coolant cooling system and the refrigerant cooling system.

11. The control method according to claim 1, characterized by, Before controlling the battery to discharge to the thermal management system of the battery, the method further includes: determining the outputtable power of the battery; The method further includes: In a case where the outputtable power of the battery is less than or equal to a first power, a low-voltage power supply of the electrical equipment is controlled to discharge to a coolant cooling system, and the thermal management system includes the coolant cooling system and a refrigerant cooling system.

12. The control method according to any one of claims 6, 7, 9, and 11, characterized by, The low-voltage power supply is discharged to an over-discharged state.

13. The control method according to claim 1, characterized by, Before controlling the battery to be powered on, the method further includes: determining that the battery is in a non-charging state, wherein the first state information further includes information indicating that the battery is in a charging state or a non-charging state; or In a case where the battery is in a charging state, the battery is controlled to stop charging.

14. A device for controlling thermal abnormality of a battery, characterized by comprising: The device includes: an acquisition unit configured to acquire first state information, the first state information including information indicating that the battery has a thermal abnormality; a control unit configured to control the battery to be powered on or remain in a powered-on state; the acquisition unit is configured to acquire second state information, the second state information including information indicating a state of the electrical equipment, the state of the electrical equipment including a non-operating state or an operating state; the control unit is configured to, in a case where the electrical equipment is in a non-operating state, control the battery to discharge to a thermal management system of the battery; or in a case where the electrical equipment is in an operating state, control the battery to discharge to the thermal management system, and control the battery to discharge to a power system of the electrical equipment.

15. The control device of claim 14, wherein: the acquisition unit is configured to acquire third state information and fourth state information, the third state information including information indicating that the battery changes from a thermal runaway state to a non-thermal runaway state, and the fourth state information including information indicating that the electrical equipment changes from an operating state to a non-operating state; the control unit is configured to control the battery to be powered off.

16. The control device of claim 14, wherein: the control unit is configured to, in a case where the battery cannot be controlled to be powered on or remain in a powered-on state, control a low-voltage power supply of the electrical equipment to discharge to the thermal management system.

17. The control device of claim 16, wherein: the control unit is configured to control the low-voltage power supply to discharge to a second load of the thermal management system.

18. The control device of claim 16, wherein, The low-voltage power supply is discharged to an over-discharged state.

19. A device for controlling thermal abnormality of a battery, characterized by comprising: The control device includes a memory and a processor, the memory is configured to store instructions, and the processor is configured to read the instructions and perform the control method according to any one of claims 1-13 according to the instructions.

20. An electrical device, comprising: The electrical equipment includes a battery, a thermal management system of the battery, and a control device according to any one of claims 14-19.

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