Battery thermal anomaly control method and control device

Abstract

The embodiment of the present application provides a method and device for controlling thermal anomalies of a battery, the method comprising: obtaining first status information, the first status information comprising information for indicating that a thermal anomaly occurs in the battery; controlling the battery to power on or maintain a powered-on state; obtaining second status information, the second status information comprising information for indicating a state of an electric device, the state of the electric device comprising a non-operating state or an operating state; when the electric device is in a non-operating state, controlling the battery to discharge to the thermal management system of the battery; or, when the electric device is in an operating state, controlling the battery to discharge to the thermal management system and controlling the battery to discharge to the power system of the electric device. The method and device for controlling thermal anomalies of a battery provided in the embodiment of the present application, when a thermal anomaly occurs in the battery, takes into account the state of the electric device to determine the discharge object of the battery, can quickly and effectively cool the battery, and can improve the user experience.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a method and device for controlling thermal anomalies of a battery. Background Art

[0002] Due to its advantages such as high energy density, rechargeable, safety and environmental protection, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0003] Under the influence of factors such as overcharge, overdischarge, overheating, and mechanical collision, the internal temperature of the battery may continue to rise, leading to thermal runaway of the battery. When one or more battery cells experience thermal runaway, the heat will be transferred to the adjacent battery cells, which may cause fire or explosion at any time. When a battery experiences thermal runaway, it is usually disconnected by disconnecting the battery relay to cut off the battery's external energy output, thereby reducing the continued generation of heat. However, this treatment method will reduce the battery temperature more slowly, which is still prone to dangerous situations such as fire or explosion. Summary of the invention

[0004] The embodiments of the present application provide a method and device for controlling thermal anomalies of a battery. When a thermal anomaly occurs in the battery, the state of the electrical equipment is taken into consideration to determine the discharge object of the battery. The battery can be cooled quickly and effectively, while improving the user experience.

[0005] In a first aspect, a method for controlling a thermal anomaly of a battery is provided, the control method comprising: obtaining first status information, the first status information comprising information for indicating that a thermal anomaly of the battery occurs; controlling the battery to power on or maintain a powered-on state; obtaining second status information, the second status information comprising information for indicating a status of an electric device, the status of the electric device comprising a non-operating state or an operating state; when the electric device is in a non-operating state, controlling the battery to discharge to a thermal management system; or, when the electric device is in an operating 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.

[0006] In the embodiment of the present application, when a thermal anomaly occurs in the battery, the state of the electrical equipment is taken into consideration. When a thermal anomaly occurs in the battery and the electrical equipment is in a non-operating state, the battery can be controlled to discharge to the thermal management system to quickly cool down and dissipate the battery. The battery can quickly change from a thermal anomaly state to a relatively stable state, thereby reducing the possibility of dangerous situations such as fire and explosion caused by the thermal anomaly of the battery. When a thermal anomaly occurs in the battery and the electrical equipment is in an operating state, the battery can be cooled to make the battery as stable as possible, while giving the user reaction time to operate the electrical equipment and move from the electrical equipment to a relatively safe location, thereby reducing the user's loss and improving the user experience.

[0007] In a possible implementation, the method further includes: acquiring 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 controlling the battery to power off.

[0008] In the embodiment of the present application, when the battery has a thermal anomaly and the power-consuming device is in a non-operating state, the battery is controlled to discharge to the thermal management system to dissipate heat and cool the battery. When the battery changes from a thermal anomaly state to a thermally stable state, the battery is controlled to be powered off to facilitate subsequent processing of the battery.

[0009] In a possible implementation, the method also includes: obtaining third state information and fourth state information, the third state information including information for indicating that the battery changes from a thermal abnormality state to a thermal stability state, and the fourth state information including information for indicating that the electrical equipment changes from an operating state to a non-operating state; and controlling the battery to power off.

[0010] In an embodiment of the present application, when a thermal anomaly occurs in the battery and the electric device is in operation, the battery is controlled to discharge to the thermal management system and the power system of the electric device, so that the thermal management system can cool the battery while the electric device can continue to operate. When the battery state changes from a thermal anomaly state to a relatively stable state and the electric device changes from an operating state to a non-operating state, the battery is controlled to be powered 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 dangerous situations such as fire and explosion caused by battery thermal anomalies is reduced, and the power system is powered off when the electric device is in a non-operating state, such as when the vehicle is stopped, rather than suddenly powering off when the electric device is running, thereby reducing user losses and improving user experience.

[0011] In a possible implementation, controlling the battery to discharge into the thermal management system includes: controlling the battery to discharge into a first load of the thermal management system.

[0012] In the embodiment 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 heat and reduce the temperature of the battery.

[0013] In a possible implementation, controlling the battery to discharge into the thermal management system includes: controlling the battery to discharge into a low-voltage power supply of an electrical device; and controlling the low-voltage power supply to discharge into a second load of the thermal management system.

[0014] In the embodiment 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 can be used to dissipate heat and cool the battery.

[0015] In a possible implementation, the method further includes: when the battery cannot be controlled to be powered on or is in a powered-on state, controlling the low-voltage power supply of the power-consuming device to discharge to the thermal management system.

[0016] In an embodiment of the present application, when the battery cannot be controlled to be powered on or in a powered-on state, a low-voltage power supply can be used to discharge to the thermal management system, thereby dissipating heat and cooling the battery, reducing the possibility of dangerous situations such as fire and explosion caused by battery thermal anomalies.

[0017] In a possible implementation, controlling the low-voltage power supply of the electrical device to discharge to the thermal management system includes: controlling the low-voltage power supply of the electrical device to discharge to the second load of the thermal management system.

[0018] In the embodiment of the present application, when a thermal anomaly occurs in the battery, 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 heat and cool the battery.

[0019] In one possible implementation, before controlling the battery to discharge to the thermal management system, the method also includes: determining the output power of the battery; controlling the battery to discharge to the thermal management system, including: when the output power of the battery is greater than or equal to the first power, controlling the battery to discharge to the load of the coolant cooling system or the refrigerant cooling system, the thermal management system including the coolant cooling system or the refrigerant cooling system.

[0020] In an embodiment of the present application, when the output 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 can increase the cooling time of the coolant cooling system or the refrigerant cooling system, and can quickly and effectively cool down and dissipate the battery.

[0021] In some embodiments, before controlling the battery to discharge to the thermal management system, the method also includes: determining the output power of the battery; the method also includes: when the output power of the battery is less than or equal to the first power, controlling the low-voltage power supply of the electrical equipment to discharge to the coolant cooling system or the refrigerant cooling system, and the thermal management system includes a coolant cooling system or a refrigerant cooling system.

[0022] In an embodiment of the present application, when the battery's output power is relatively small, the battery may not be able to meet the operating requirements of the thermal management system. The low-voltage power supply of the electrical equipment can be used to discharge the coolant cooling system to cool down and dissipate the heat of the battery.

[0023] In one possible implementation, before controlling the battery to discharge to the thermal management system, the method also includes: determining the output power of the battery; controlling the battery to discharge to the thermal management system, including: 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, controlling the battery to discharge to the load of the coolant cooling system; or, when the output power of the battery is greater than or equal to the second power, controlling the battery to discharge to the load of the refrigerant cooling system, the thermal management system including a coolant cooling system and a refrigerant cooling system.

[0024] 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 controlled to discharge to the coolant cooling system; when 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, when the output power of the battery is different, it can be considered whether to use the battery to discharge to the coolant system or the refrigerant system, increase the working time of the thermal management system, improve the cooling efficiency and cooling effect of the battery, and thus quickly and effectively cool down and dissipate the heat of the battery.

[0025] In one possible implementation, before controlling the battery to discharge to the thermal management system, the method also includes: determining the output power of the battery; the method also includes: when the output power of the battery is less than or equal to the first power, controlling the low-voltage power supply of the electrical equipment to discharge to the load of the coolant cooling system, and the thermal management system includes a coolant cooling system and a refrigerant cooling system.

[0026] In an embodiment of the present application, when the battery's output power is relatively small, the battery may not be able to meet the operating requirements of the thermal management system. The low-voltage power supply of the electrical equipment can be used to discharge the coolant cooling system to cool down and dissipate the heat of the battery.

[0027] In a possible implementation, the low voltage power supply is discharged to an over-discharge state.

[0028] In an embodiment of the present application, when a low-voltage power supply is used to discharge the thermal management system, since the low-voltage power supply has a low amount of stored power, the low-voltage power supply can be controlled to over-discharge, thereby increasing the working time of the thermal management system, such as the flow rate and circulation time of the coolant, to quickly and continuously dissipate heat and cool the battery.

[0029] In one possible implementation, before controlling the battery to power on, the method also includes: determining that the battery is in a non-charging state, wherein the first status information also includes information for indicating that the battery is in a charging state or a non-charging state; or, when the battery is in a charging state, controlling the battery to stop charging.

[0030] In the embodiment of the present application, before controlling the battery to discharge to the thermal management system, it is necessary to first determine whether the battery is being charged. If the battery is being charged, the charging needs to be stopped first. For example, for lithium batteries, charging and discharging cannot be performed at the same time. 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 battery usage requirements.

[0031] In a second aspect, a control device for a battery thermal anomaly is provided, the device comprising: an acquisition unit for acquiring first status information, the first status information comprising information for indicating that a thermal anomaly occurs in the battery; a control unit for controlling the battery to be powered on or to remain powered on; an acquisition unit for acquiring second status information, the second status information comprising information for indicating a status of an electric device, the status of the electric device comprising a non-operating status or an operating status; a control unit for controlling the battery to discharge to a thermal management system when the electric device is in a non-operating status; or, controlling the battery to discharge to the thermal management system when the electric device is in an operating status, and controlling the battery to discharge to a power system of the electric device.

[0032] In a possible implementation, the acquisition unit is used to acquire third state information, where the third state information includes information indicating that the battery changes from a thermal abnormality state to a thermal stability state; and the control unit is used to control the battery to power off.

[0033] In one possible implementation, an acquisition unit is used to acquire third state information and fourth state information, the third state information includes information indicating that the battery changes from a thermal abnormality state to a thermal stability state, and the fourth state information includes information indicating that the electrical equipment changes from an operating state to a non-operating state; and a control unit is used to control the battery to power off.

[0034] In a possible implementation, the control unit is used to control the battery to discharge to the first load of the thermal management system.

[0035] In a possible implementation, the control unit is used to control the battery to discharge to the low-voltage power supply of the electrical device; and control the low-voltage power supply to discharge to the second load of the thermal management system.

[0036] In a possible implementation, the control unit is used to control the low-voltage power supply of the electrical device to discharge to the thermal management system when the battery cannot be powered on or is in a powered-on state.

[0037] In a possible implementation, the control unit is used to control the low-voltage power supply of the electrical device to discharge to the second load of the thermal management system.

[0038] In one possible implementation, the control unit is used to: determine the output power of the battery; when the output power of the battery is greater than or equal to the first power, control the battery to discharge to the load of the coolant cooling system or the refrigerant cooling system, and the thermal management system includes the coolant cooling system or the refrigerant cooling system.

[0039] In some embodiments, the control unit is used to: determine the output power of the battery; when 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 or the refrigerant cooling system, and the thermal management system includes a coolant cooling system or a refrigerant cooling system.

[0040] In one possible implementation, the control unit is used to: determine the output power of the battery; 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, control the battery to discharge to the load of the coolant cooling system; or, when the output power of the battery is greater than or equal to the second power, control the battery to discharge to the load of the refrigerant cooling system, and the thermal management system includes a coolant cooling system and a refrigerant cooling system.

[0041] In one possible implementation, the control unit is used to: determine the output power of the battery; when 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 load of the coolant cooling system, and the thermal management system includes a coolant cooling system and a refrigerant cooling system.

[0042] In a possible implementation, the control unit discharges the low-voltage power supply to an over-discharge state.

[0043] In a possible implementation, the control unit is used to determine that the battery is in a non-charging state, wherein the first state information also includes information indicating that the battery is in a charging state or a non-charging state; or, when the battery is in a charging state, control the battery to stop charging.

[0044] In a third aspect, a control device for battery thermal anomaly is provided, the control device comprising a memory and a processor, the memory being used to store instructions, the processor being used to read instructions and execute, according to the instructions, a control method as in the first aspect and any possible implementation of the first aspect.

[0045] In a fourth aspect, an electrical device is provided, the electrical device comprising a battery, a thermal management system of the battery, and a control device as in the second aspect or any possible implementation of the second aspect.

[0046] In a fifth aspect, a chip is provided, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a control method as in the first aspect or any possible implementation of the first aspect.

[0047] In a sixth aspect, a computer program is provided. When the computer program is executed by a computer, the computer implements the control method in the first aspect or any possible implementation of the first aspect.

[0048] In the seventh aspect, a computer-readable storage medium is provided, which is used to store a computer program. When the computer program is executed by a computer, the computer implements the control method in the first aspect or any possible implementation of the first aspect.

[0049] In an eighth aspect, a computer program product is provided, comprising computer program instructions, which, when executed by a computer, enable the computer to implement the control method in the first aspect or any possible implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic diagram of the connection between a battery and a load on an electrical device provided in an embodiment of the present application.

[0051] Figure 2 Schematic diagram of a liquid-cooled thermal management system provided in an embodiment of the present application.

[0052] Figure 3 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application.

[0053] Figure 4 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application.

[0054] Figure 5 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application.

[0055] Figure 6 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application.

[0056] Figure 7 A flow chart of a method for controlling the discharge of a battery into a thermal management system provided in an embodiment of the present application.

[0057] Figure 8 A flow chart of a method for controlling the discharge of a battery into a thermal management system provided in an embodiment of the present application.

[0058] Fig. 9 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application.

[0059] Fig.10 It is a schematic block diagram of a battery thermal anomaly control device provided in an embodiment of the present application.

[0060] Fig.11 It is another schematic block diagram of the battery thermal anomaly control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0062] In the description of the embodiments of the present application, the technical terms "first", "second", etc. 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 "multiple" is more than two, unless otherwise clearly and specifically defined.

[0063] The term "and / or" is only a way to describe the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0064] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0065] Due to its advantages such as high energy density, rechargeable, safety and environmental protection, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0066] Under the influence of overcharge, overdischarge, overheating, mechanical collision and other factors, the internal temperature of the battery may continue to rise, which may lead to thermal anomalies in the battery. When one or more battery cells have thermal anomalies, the heat will be transferred to the adjacent battery cells, which may cause fire or explosion at any time.

[0067] When a battery has abnormal heat, the battery relay is usually disconnected to cut off the battery's external energy output, thereby suppressing the continued generation of heat. However, this treatment method reduces the battery temperature slowly, which can still easily lead to dangerous situations such as fire or explosion.

[0068] Based on the above problems, the present application proposes a control method and control device for battery thermal anomaly, the control method comprising: obtaining first status information, the first status information comprising information for indicating that a thermal anomaly occurs in the battery; controlling the battery to power on or keep it powered on; obtaining second status information, the second status information comprising information for indicating a status of an electrical device, the status of the electrical device comprising a non-operating status or an operating status; when the electrical device is in a non-operating status, controlling the battery to discharge to a thermal management system of the battery; or, when the electrical device is in an operating status, controlling the battery to discharge to the thermal management system, and controlling the battery to discharge to a power system of the electrical device.

[0069] The battery thermal anomaly control method and control device provided in the embodiments of the present application take into account the state of the electrical equipment to determine the discharge object of the battery when a thermal anomaly occurs in the battery, and can quickly and effectively cool the battery while improving the user experience.

[0070] Figure 1 This is a schematic diagram of the connection between the battery and the load on the electrical equipment applicable to the embodiment of the present application.

[0071] The battery 100 includes at least one battery cell. Figure 1 As shown, the battery 100 includes battery cells 111 to 11n. In the present application, the battery may also be referred to as a battery pack.

[0072] In order to meet different usage requirements, multiple battery cells can be connected in series, in parallel, or in hybrid connection, where hybrid connection refers to a mixture of series and parallel connection. In some embodiments, multiple battery cells can be connected in series, in parallel, or in hybrid connection to form a battery module, and multiple battery modules can be connected in series, in parallel, or in hybrid connection to form a battery. In other words, multiple battery cells can directly form a battery, or they can first form a battery module, and then the battery module can form a battery.

[0073] In some embodiments, the battery 100 includes a relay S, which is connected to the battery cell and is used to control the power-on and power-off of the battery 100. When the relay S is closed, the battery 100 is powered on, thereby realizing a high-voltage connection between the battery and the electrical device, and the battery can discharge the electrical device; when the relay S is disconnected, the battery 100 is powered off, thereby disconnecting the high-voltage connection between the battery 100 and the electrical device, and the battery stops discharging the high-voltage device.

[0074] Optionally, in some embodiments, a main positive relay, a main negative relay, a pre-charge relay and a pre-charge resistor may be used to control the power on and off of the battery. For example, the main negative relay and the pre-charge relay may be closed first to perform high-voltage pre-charge. After the pre-charge process is completed, the main positive relay may be closed, and then the pre-charge relay may be disconnected with a delay, thereby controlling the high-voltage connection between the battery system and the electrical device, that is, powering on the battery. For another example, the main positive relay and the main negative relay may be disconnected in sequence to disconnect the high-voltage connection between the battery system and the electrical device, that is, powering off the battery.

[0075] 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 achieve management of the battery 100.

[0076] In some embodiments, the battery 100 includes a first total output pole 131 and a second total output pole 132 , and the first total output pole 131 and the second total output pole 132 are connected to both ends of a load of an electrical device to achieve discharge of the battery 100 to the load.

[0077] In some embodiments, one end of the load may be connected to one end of the switch, and the other ends of the switch and the load may be connected to the first total output pole 131 and the second total output pole 132, respectively, so that when the battery 100 is powered on, the power supply of each load may be independently controlled. Figure 1 As shown, 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 first load M1, the second load M2, and the third load M3 can be individually controlled to be powered on and powered off by closing and opening the first switch S1, the second switch S2, and the third switch S3.

[0078] In the embodiment of the present application, the load may be a thermal management system, or may be a component of the thermal management system, or may be low-voltage electricity of an electrical device, and the like.

[0079] It should be understood that Figure 1The components shown are only examples. In actual applications, the components may have different names, or the components may be added or deleted according to actual needs.

[0080] The electric equipment mentioned in the embodiments of the present application may refer to vehicles, such as battery cars, electric vehicles, etc. The electric equipment mentioned in the embodiments of the present application may also be other devices that use batteries, such as mobile phones, portable devices, laptops, electric toys, electric tools, ships and spacecraft, etc. Spacecraft include, for example, airplanes, rockets, space shuttles and spacecraft, etc. It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices that use batteries.

[0081] Figure 2 Schematic diagram of a liquid-cooled thermal management system applicable to an embodiment of the present application.

[0082] The thermal management system 200 can manage the temperature of the battery 100 to achieve cooling or heating of the battery 100. When 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 to achieve cooling of the battery 100; when the temperature of the battery 100 is too low, the thermal management system 200 can provide heat for the battery 100 to achieve heating of the battery 100.

[0083] 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 , and the like.

[0084] The compressor 210 is a driven fluid machine that boosts low-pressure gas to high-pressure gas. The air intake port of the compressor 210 sucks in low-pressure gaseous refrigerant, and after the motor drives the piston to compress the low-pressure gaseous refrigerant, the high-pressure gaseous refrigerant is discharged to the exhaust port, providing power for the phase change cycle of the refrigerant.

[0085] The condenser 220 is a device that can convert gas or steam into liquid (gas-liquid conversion). The high-pressure gaseous refrigerant is converted into a high-pressure liquid refrigerant through the condenser 220, and the heat emitted during the gas-liquid conversion process is quickly transferred to the external environment such as the air medium.

[0086] The evaporator 230 is a device that can convert liquid substances into gaseous substances. The liquid refrigerant passes through the evaporator 230 and exchanges heat with the outside air to become a gaseous refrigerant. During the process of gasification of the refrigerant, it absorbs heat from the surrounding air.

[0087] The pump 250 is used to transfer mechanical energy or other external energy to the coolant, so as to increase the energy of the coolant and thereby accelerate the flow speed and pressure of the coolant.

[0088] The working principle of the multi-way valve 270 is to connect different fluid channels to each other through a rotating valve core, thereby switching different flow paths for the coolant.

[0089] In some embodiments, the thermal management system 200 may further include an expansion valve.

[0090] The expansion valve is used to release the pressure of high-pressure liquid refrigerant, cool the released refrigerant, and convert it into low-pressure liquid refrigerant. The expansion valve can reduce the pressure (or release or throttle) of the input high-pressure liquid refrigerant to obtain low-pressure liquid refrigerant. The expansion valve can also be called an electronic expansion valve, a thermal expansion valve, or a throttle valve.

[0091] In some embodiments, an expansion valve is installed at the inlet of the evaporator 230. The expansion valve can play a role in throttling and controlling the flow of the refrigerant.

[0092] For example, to cool the battery 100 again, the compressor 210 can compress the low-pressure gaseous refrigerant into a 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 a high-pressure liquid refrigerant, and then releases the pressure through the expansion valve and converts it into a low-pressure liquid refrigerant, and the low-pressure liquid refrigerant 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 and the low-pressure liquid refrigerant perform heat exchange, the high-temperature coolant releases heat and turns into a low-pressure coolant, and the low-pressure liquid refrigerant absorbs heat and turns into a low-pressure gaseous refrigerant. The low-pressure gaseous refrigerant can continue to flow into the compressor through the refrigerant flow channel for compression, thereby completing the refrigerant circulation process; the low-temperature coolant flows into the battery 100 through the multi-way valve 270 to cool the battery 100, thereby completing the coolant circulation process.

[0093] Figure 2 The thermal management system 200 shown uses a refrigerant cooling system to cool the battery. The refrigerant cooling system mainly uses a refrigerant as a medium to cool the battery. As an example, the refrigerant can flow directly through the battery to cool the battery. The refrigerant cooling system may 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 may also include a pump 250, etc., which is used to control the flow rate and pressure of the coolant.

[0094] In some embodiments, the thermal management system 200 can use a coolant cooling system to cool the battery, mainly using the circulation of the coolant to remove the heat of the battery. For example, the thermal management system may include a coolant system, and the coolant system includes a pump, a heat dissipation device such as a heat dissipation water tank, a coolant flow channel, etc. For example, the high-temperature coolant flowing through the battery 100 flows to the heat dissipation water tank under the action of the pump, and heat is exchanged with the external environment through the heat dissipation water tank, and the high-temperature coolant is converted into a low-temperature coolant, and then continues to flow to the battery 100.

[0095] In some embodiments, the thermal management system 200 may include a refrigerant cooling system and a coolant cooling system.

[0096] It should be understood that Figure 2 The components shown are only examples. In actual applications, the components may have different names, or the components may be added or deleted according to actual needs.

[0097] Figure 3 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application. Figure 3 The battery thermal anomaly control method shown is applicable to Figure 1 Electrical equipment and Figure 2 Thermal management system.

[0098] 310, obtain first status information.

[0099] The first status information includes information indicating that a thermal abnormality occurs in the battery.

[0100] Battery thermal anomaly may refer to abnormal increase in battery temperature and / or heating rate. For example, during the use of the battery, due to certain reasons such as overcharge and discharge, collision, internal short circuit of the battery, etc., the battery temperature and / or heating rate may increase abnormally, such as causing the battery to be about to have thermal runaway, may have thermal runaway, or have thermal runaway.

[0101] For example, it is possible to determine whether the battery has a thermal anomaly by using at least one of the battery parameter information such as the battery current, voltage, temperature, pressure, or smoke concentration in the battery, etc. If the battery parameter information is within a preset range, it is considered that the battery has a thermal anomaly.

[0102] For example, the voltage of each battery cell can be monitored by a low voltage monitoring system, and a sensor can be set every few battery cells to monitor the temperature of the battery cells, and whether a thermal anomaly occurs can be determined by changes in the temperature and voltage of the battery.

[0103] Exemplarily, the BMS may determine whether a thermal anomaly occurs in the battery based on the battery parameter information. When a thermal anomaly occurs in the battery, the BMS may send an indication signal to a vehicle control unit (VCU), so that the VCU can obtain first status information indicating that a thermal anomaly occurs in the battery.

[0104] For example, the BMS is responsible for monitoring the temperature and voltage of the battery cells, and determines whether a thermal anomaly occurs based on the temperature and voltage changes. When it is determined that a battery cell has a thermal anomaly, the BMS can send an indication signal to the VCU.

[0105] 320, control the battery to be powered on or to remain powered on.

[0106] For example, the VCU may send instruction information to the BMS to control the battery to be powered on or to maintain the powered on state.

[0107] If the battery is in the off state, control the battery to power on. For example, if the battery is abnormally hot during charging, you need to control the battery to power on. Figure 1 The relay S in is closed.

[0108] If the battery is powered on, the battery is controlled to remain powered on. For example, if the battery is powered on, such as when the vehicle is driving, and the battery is abnormally heated, the battery is controlled to remain powered on. Figure 1 The relay S in the circuit continues to remain closed.

[0109] 330, obtain second status information.

[0110] The second state information includes information for indicating whether the electric device is in an operating state or a non-operating state.

[0111] Exemplarily, the electric device is in an operating state, that is, the power system of the electric device is in an operating state. For example, the power system of a vehicle, such as a motor, a steering pump, etc., is in an operating state, and the vehicle is driving.

[0112] Exemplarily, the electric device is in a non-operating state, that is, the power system of the electric device is in a non-operating state. For example, the power system of the vehicle, such as the engine, is in a non-starting state or is started and not running, and the vehicle is stationary. For another example, the vehicle is in a charging state.

[0113] 340a, when the electric device is in a non-operating state, controlling the battery to discharge to the thermal management system.

[0114] In the embodiment of the present application, when the battery has a thermal anomaly and the battery temperature is too high, the thermal management system can cool the battery. That is, when the battery has a thermal anomaly, the battery discharges to the thermal management system, so that the thermal management system works and cools the battery.

[0115] When a thermal anomaly occurs in the battery, the battery is controlled to be powered on or remain powered on, so that the battery can output energy to the thermal management system.

[0116] For example, when the electric device is in a charging state, the battery is controlled to discharge only to the thermal management system.

[0117] In an embodiment of the present application, when a thermal anomaly occurs in the battery and the electrical equipment is in a non-operating state, the battery can be controlled to discharge to the thermal management system to quickly cool down and dissipate the heat of the battery. The battery can quickly change from a thermal anomaly state to a relatively stable state, thereby reducing the possibility of dangerous situations such as fire and explosion caused by the battery thermal anomaly.

[0118] 340b, when the electric device is in operation, controlling the battery to discharge to the thermal management system, and controlling the battery to discharge to the power system of the electric device.

[0119] The power system of the electric equipment is used to drive the electric equipment to operate. Taking a vehicle as an example, its power system includes a load used to drive the vehicle to travel, such as a motor controller, an electric air pump, an electric steering pump, and the like.

[0120] When a battery has a thermal anomaly, while the electric device is in operation, the battery is controlled to discharge to the thermal management system and the power system of the electric device, so that the battery is cooled while the electric device can still operate. For example, when a battery has a thermal anomaly and the vehicle is driving, the battery is cooled while the user can drive the vehicle to a relatively safe location and control the vehicle to slow down and stop, and the user can move from the vehicle to a safer location.

[0121] In the embodiment of the present application, when the battery has a thermal anomaly, the discharge object of the battery can be determined according to the state of the power-consuming device. In this way, when the battery has a thermal anomaly, the state of the power-consuming device is taken into consideration, the battery can be cooled down to make the battery as stable as possible, and the user can be given reaction time to operate the power-consuming device and move from the power-consuming device to a relatively safe location, thereby reducing the loss of personal and property safety of the user and improving the user experience.

[0122] Figure 4 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application.

[0123] 410, obtaining first status information.

[0124] The first status information includes information indicating that a thermal abnormality occurs in the battery.

[0125] 420, control the battery to be powered on or to remain powered on.

[0126] 430, obtaining second status information.

[0127] The second state information includes information for indicating whether the electric device is in an operating state or a non-operating state.

[0128] 440a, when the electric device is in a non-operating state, controlling the battery to discharge to the thermal management system.

[0129] 450a, obtaining third state information.

[0130] The third state information includes information indicating that the battery changes from a thermally abnormal state to a thermally stable state.

[0131] The thermally stable state may refer to a state in which the temperature of the battery is lower than a certain value and tends to be stable.

[0132] Exemplarily, when the battery parameter information is within a preset range, it is considered that the battery has a thermal anomaly. Then, when the battery parameter information changes from within the preset range to outside the preset range, it is considered that the battery changes from a thermal anomaly state to a thermally stable state.

[0133] For example, the BMS is responsible for monitoring the temperature and voltage of the battery cells, and determines whether the battery changes from a thermally abnormal state to a thermally stable state based on the temperature change and the voltage change. When it is determined that a battery changes from a thermally abnormal state to a thermally stable state, the BMS can send an indication signal to the VCU, so that the VCU can obtain the third state information.

[0134] 460a, control battery power off.

[0135] In the embodiment of the present application, when the battery has a thermal anomaly and the power-consuming device is in a non-operating state, the battery is controlled to discharge to the thermal management system to dissipate heat and cool the battery. When the battery changes from a thermal anomaly state to a thermally stable state, the battery is controlled to be powered off to facilitate subsequent processing of the battery.

[0136] 440b, when the electric device is in operation, controlling the battery to discharge the thermal management system and the power system of the electric device.

[0137] The contents of steps 410 to 440 can refer to the relevant descriptions of steps 310 to 340, and this application will not elaborate on them here.

[0138] 450b, obtaining third state information and fourth state information.

[0139] The third state information includes information indicating that the battery changes from a thermally abnormal state to a thermally stable state. The fourth state information includes information indicating that the electric device changes from an operating state to a non-operating state.

[0140] Exemplarily, when the battery parameter information is within a preset range, it is considered that the battery has a thermal anomaly. Then, when the battery parameter information changes from within the preset range to outside the preset range, it is considered that the battery changes from a thermal anomaly state to a thermally stable state.

[0141] For example, the BMS is responsible for monitoring the temperature and voltage of the battery cells, and determines whether the battery changes from a thermally abnormal state to a thermally stable state based on the temperature change and the voltage change. When it is determined that a battery changes from a thermally abnormal state to a thermally stable state, the BMS can send an indication signal to the VCU, so that the VCU can obtain the third state information.

[0142] The description of the battery being in a non-operating state can refer to the relevant content above, and this application will not go into details here.

[0143] When a battery thermal anomaly occurs and the electrical equipment is in operation, 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 as stable as possible. At the same time, 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 and stop, so that the electrical equipment changes from an operating state to a non-operating state, thereby obtaining information on the battery changing from an operating state to a non-operating state.

[0144] 460b, control battery power off.

[0145] In an embodiment of the present application, when a thermal anomaly occurs in the battery and the electric device is in operation, the battery is controlled to discharge to the thermal management system and the power system of the electric device, so that the thermal management system can cool the battery while the electric device can continue to operate. When the battery state changes from a thermal anomaly state to a relatively stable state and the electric device changes from an operating state to a non-operating state, the battery is controlled to be powered 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 dangerous situations such as fire and explosion caused by battery thermal anomalies is reduced, and the power system is powered off when the electric device is in a non-operating state, such as when the vehicle is stopped, rather than suddenly powering off when the electric device is running, thereby reducing user losses and improving user experience.

[0146] Figure 5 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application.

[0147] 510, obtaining first status information.

[0148] The first status information includes information indicating that a thermal abnormality occurs in the battery.

[0149] 520, control the battery to be powered on or to remain powered on.

[0150] 530, obtaining second status information.

[0151] The second state information includes information for indicating whether the electric device is in an operating state or a non-operating state.

[0152] The contents of steps 510 to 530 can refer to the relevant descriptions of steps 310 to 330, and this application will not elaborate on them here.

[0153] 540a-1, when the electric device is in a non-operating state, control the battery to discharge to the first load of the thermal management system.

[0154] In some embodiments, the first load may be a load powered by high voltage, that is, the battery may discharge directly to the first load without energy transfer through other power sources such as low voltage power sources. For example, the battery may discharge to the first load through a direct current / direct current (DC / DC) converter. For example, the first load may include a compressor.

[0155] In some embodiments, all loads of the thermal management system may be the first load, or part of the loads of the thermal management system may be the first load.

[0156] In the embodiment 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 heat and reduce the temperature of the battery.

[0157] 540a-2, when the electric device is in a non-operating state, controlling the battery to discharge to the low-voltage power supply of the electric device, and controlling the low-voltage power supply to discharge to the second load of the thermal management system.

[0158] In some embodiments, the second load may be a load powered by a low voltage, that is, the battery needs to discharge to the second load through the low voltage power supply. For example, the battery may discharge to the low voltage power supply through a direct current / direct current (DC / DC) converter, and the low voltage power supply discharges to the second load. For example, the second load may include a water pump.

[0159] In some embodiments, all loads of the thermal management system may be the second load, or part of the loads of the thermal management system may be the second load.

[0160] In the embodiment 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 can be used to dissipate heat and cool the battery.

[0161] 540b-1, when the electric device is in operation, control the battery to discharge to the first load of the thermal management system.

[0162] 540b-2, when the electric device is in the running state, control the battery to discharge to the low-voltage power supply of the electric device, and control the low-voltage power supply to discharge to the second load of the thermal management system.

[0163] 540b-3, when the electric device is in operation, control the battery to discharge to the power system of the electric device.

[0164] The contents of the first load and the second load in 530b can refer to the relevant description in 530a, and this application will not elaborate on them here.

[0165] Figure 6 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application.

[0166] 610, obtaining first status information.

[0167] The first status information includes information indicating that a thermal abnormality occurs in the battery.

[0168] 620a, controlling the battery to be powered on or to remain powered on.

[0169] 630a, obtaining second state information.

[0170] The second state information includes information for indicating whether the electric device is in an operating state or a non-operating state.

[0171] 640a-1, when the electric device is in a non-operating state, control the battery to discharge to the thermal management system.

[0172] 640a-2, when the electric device is in operation, control the battery to discharge to the thermal management system, and control the battery to discharge to the power system of the electric device.

[0173] The description of steps 610 and 620a to 640a may refer to the relevant contents of steps 310 to 340, and this application will not elaborate on them here.

[0174] 620b, when the battery cannot be powered on or is in a powered-on state, the low-voltage power supply of the power-consuming device is controlled to discharge to the thermal management system.

[0175] In some embodiments, due to a hardware failure such as a relay damage, the relay cannot be closed and the battery cannot be powered on or is in a powered-on state.

[0176] The battery cannot be powered on or cannot be in a powered-on state, resulting in the battery being unable to discharge to the thermal management system. In this case, a low-voltage power supply can be used to discharge to the thermal management system.

[0177] In an embodiment of the present application, when the battery cannot be controlled to be powered on or is in a powered-on state, a low-voltage power supply can be used to discharge to the thermal management system, thereby dissipating heat and cooling the battery, reducing the possibility of dangerous situations such as fire and explosion caused by battery thermal anomalies.

[0178] In some embodiments, the low-voltage power supply of the powered device may be controlled to discharge to the second load of the thermal management system.

[0179] For the description of the second load, please refer to the relevant content above, and this application will not go into details here.

[0180] In some embodiments, the thermal management system includes a second load. For example, part of the load of the thermal management system is the second load. Of course, all loads of the thermal management system may also be the second load.

[0181] In the embodiment of the present application, when a thermal anomaly occurs in the battery, 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 heat and cool the battery.

[0182] In some embodiments, the low-voltage power supply of the power-consuming device may be controlled to an over-discharge state toward the thermal management system.

[0183] Over-discharge means that the discharge voltage reaches the discharge cut-off voltage but the battery continues to discharge. For example, the battery discharge cut-off voltage is 3.2V, and the battery continues to discharge when the discharge voltage is lower than 3.2V. Over-discharge will cause battery aging, shortened life and other problems.

[0184] In an embodiment of the present application, when a low-voltage power supply is used to discharge the thermal management system, since the low-voltage power supply has a low amount of stored power, the low-voltage power supply can over-discharge the thermal management system, thereby increasing the working time of the thermal management system, such as the flow rate and circulation time of the coolant, to quickly and continuously dissipate heat and cool the battery.

[0185] In some embodiments, when controlling the battery to discharge to the thermal management system, the output power of the battery must also be considered. Figure 7 and Figure 8 A method for controlling thermal anomalies of a battery in consideration of the output power of the battery will be described as an example.

[0186] Figure 7 A flow chart of a method for controlling the discharge of a battery into a thermal management system provided in an embodiment of the present application.

[0187] The thermal management system includes a coolant cooling system or a refrigerant cooling system. The contents of the coolant cooling system and the refrigerant cooling system can be referred to Figure 2 The relevant description in will not be repeated in this application.

[0188] 710, determine the output power of the battery.

[0189] When a thermal anomaly occurs in the battery, it is necessary to determine the power that the battery can output before the battery discharges to the thermal management system or the battery discharges to the thermal management system and the drive system of the electrical equipment.

[0190] 720a, when the output power of the battery is greater than or equal to the first power, control the battery to discharge to the coolant cooling system or the refrigerant cooling system.

[0191] In some embodiments, the thermal management system may include only a coolant cooling system, and when the output power of the battery is greater than or equal to a certain power, the battery may be controlled to discharge to a load of the coolant cooling system, such as a pump. For example, when the electric device is not in operation, the first power may be set by considering only the operation of the coolant system. For another example, when the electric device is in operation, the first power may be set by comprehensively considering the operation of the coolant cooling system and the operation of the power system of the electric device.

[0192] Exemplarily, the thermal management system only includes a refrigerant cooling system. When the output power of the battery is greater than or equal to a certain power, the battery can be controlled to discharge to the load of the refrigerant cooling system, such as a compressor and a pump. Similarly, when the electric device is in a non-operating state, the first power can be set by only considering the operation of the refrigerant cooling system. For another example, when the electric device is in an operating 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.

[0193] It should be understood that the first power of the coolant cooling system included in the thermal management system and the first power of the refrigerant cooling system included in the thermal management system may be the same or different, and the present application does not limit this.

[0194] In an embodiment of the present application, when the output 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 can increase the cooling time of the coolant cooling system or the refrigerant cooling system, and can quickly and effectively cool down and dissipate the battery.

[0195] 720b, when 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 or the refrigerant cooling system.

[0196] Exemplarily, the thermal management system may include a coolant-only cooling system, and when the output power of the battery is less than or equal to the first power, the low-voltage power supply of the electric device may be controlled to discharge to the coolant cooling system.

[0197] In an embodiment of the present application, when the battery's output power is relatively small and the battery charge cannot meet the operating requirements of the thermal management system, the low-voltage power supply of the electrical equipment can be used to discharge the coolant cooling system to cool down and dissipate the heat of the battery.

[0198] Figure 8 A flow chart of a method for controlling the discharge of a battery into a thermal management system provided in an embodiment of the present application.

[0199] The thermal management system includes a coolant cooling system and a refrigerant cooling system. The contents of the coolant cooling system and the refrigerant cooling system can refer to the relevant description of step 720, and this application will not repeat them here.

[0200] 810, determine the output power of the battery.

[0201] When a thermal anomaly occurs in the battery, it is necessary to determine the power that the battery can output before the battery discharges to the thermal management system or the battery discharges to the thermal management system and the drive system of the electrical equipment.

[0202] 820a, 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, control the battery to discharge to the coolant cooling system.

[0203] When the output power of the battery is between the first power and the second power, the load discharge of the battery box coolant cooling system can be controlled. At this time, the output power of the battery can discharge the load of the coolant cooling system for a relatively long time, so that the coolant cooling system can continuously cool the battery.

[0204] 820b, when 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.

[0205] When the output power of the battery is greater than the second power, the output power of the battery is relatively large, and the load of the refrigerant cooling system can be discharged in a relatively long time, so that the refrigerant cooling system can cool the battery continuously and more effectively.

[0206] 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 controlled to discharge to the coolant cooling system; when 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, when the output power of the battery is different, it can be considered whether to use the battery to discharge to the coolant system or the refrigerant system, increase the working time of the thermal management system, improve the cooling efficiency and cooling effect of the battery, and thus quickly and effectively cool down and dissipate the heat of the battery.

[0207] 820c, when 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.

[0208] When the output power of the battery is less than or equal to the first power, the battery cannot meet the operating requirements of the thermal management system. For example, the energy in the battery is insufficient to support the operation of the thermal management system. The load discharge of the low-voltage power supply-type coolant cooling system of the electrical equipment can be controlled.

[0209] In an embodiment of the present application, when the battery's output power is relatively small, the battery may not be able to meet the operating requirements of the thermal management system. The low-voltage power supply of the electrical equipment can be used to discharge the coolant cooling system to cool down and dissipate the heat of the battery.

[0210] Fig. 9 A flowchart of a method for controlling thermal anomalies of a battery provided in an embodiment of the present application.

[0211] 910. Obtain first status information.

[0212] The first status information includes information indicating that a thermal anomaly occurs in the battery and information indicating that the battery is in a charging state or a non-charging state.

[0213] 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 based on the voltage of the battery, and then the BMS can send indication information that the battery is in a charging state or a non-charging state to the VCU, so that the VCU can obtain information indicating that the battery is in a charging state or a non-charging state.

[0214] Alternatively, when the battery is being charged, the VCU will record it, so that the VCU can also obtain information indicating whether the battery is in a charging state or a non-charging state.

[0215] 920a, determine that the battery is in a non-charging state.

[0216] 920b, when the battery is in a charging state, controlling the battery to stop charging.

[0217] Before controlling the battery to discharge to the thermal management system, it is necessary to first determine whether the battery is being charged. If the battery is being charged, it is necessary to stop charging first. For example, for lithium batteries, charging and discharging cannot be performed at the same time. Therefore, if the battery is to be discharged to the thermal management system, it is necessary to stop charging the battery first to meet the battery usage requirements.

[0218] 930, obtaining second status information.

[0219] The second state information includes information for indicating whether the electric device is in an operating state or a non-operating state.

[0220] 940a, when the electric device is in a non-operating state, controlling the battery to discharge to the thermal management system.

[0221] 940b, when the electric device is in operation, controlling the battery to discharge the thermal management system and the power system of the electric device.

[0222] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0223] The above describes in detail the detection method of the battery system of the embodiment of the present application. Fig.10 and Fig.11 The control device of the battery system of the embodiment of the present application is described in detail. The technical features described in the method embodiment are applicable to the following device embodiments.

[0224] Fig.10 is a schematic block diagram of a battery thermal anomaly control device provided in an embodiment of the present application. Fig.10 The control device 1000 includes some or all of the following contents.

[0225] The acquisition unit 1010 is used to acquire first status information, wherein the first status information includes information indicating that a thermal abnormality has occurred in the battery; the control unit 1020 is used to control the battery to be powered on or to remain powered on; the acquisition unit 1010 is used to acquire second status information, wherein the second status information includes information indicating a status of an electric device, wherein the status of the electric device includes a non-operating status or an operating status; the control unit 1020 is used to control the battery to discharge to the thermal management system when the electric device is in a non-operating status; or, when the electric device is in an operating status, to control the battery to discharge to the thermal management system, and to control the battery to discharge to the power system of the electric device.

[0226] In some embodiments, the acquisition unit 1010 is used to acquire third state information, where the third state information includes information indicating that the battery changes from a thermal abnormality state to a thermal stability state; and the control unit 1020 is used to control power-off of the battery.

[0227] In some embodiments, the acquisition unit 1010 is used to acquire third state information and fourth state information, the third state information includes information indicating that the battery changes from a thermal abnormality state to a thermal stability state, and the fourth state information includes information indicating that the electrical equipment changes from an operating state to a non-operating state; the control unit 1020 is used to control the battery to power off.

[0228] In some embodiments, the control unit 1020 is used to control the battery to discharge to the first load of the thermal management system.

[0229] In some embodiments, the control unit 1020 is used to control the battery to discharge to a low-voltage power supply of an electrical device; and to control the low-voltage power supply to discharge to a second load.

[0230] In some embodiments, the control unit 1020 is used to control the low-voltage power supply of the electrical equipment to discharge to the thermal management system when the battery cannot be powered on or is in a powered-on state.

[0231] In some embodiments, the control unit 1020 is used to control the low-voltage power supply of the electrical device to discharge to the second load.

[0232] In some embodiments, the control unit 1020 is used to: determine the output power of the battery; when the output power of the battery is greater than or equal to the first power, control the battery to discharge to the load of the coolant cooling system or the refrigerant cooling system, and the thermal management system includes a coolant cooling system or a refrigerant cooling system.

[0233] In some embodiments, the control unit 1020 is used to: determine the output power of the battery; when 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 or the refrigerant cooling system, and the thermal management system includes a coolant cooling system or a refrigerant cooling system.

[0234] In some embodiments, the control unit 1020 is used to: determine the output power of the battery; 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, control the battery to discharge to the load of the coolant cooling system; or, when the output power of the battery is greater than or equal to the second power, control the battery to discharge to the load of the refrigerant cooling system, and the thermal management system includes a coolant cooling system and a refrigerant cooling system.

[0235] In some embodiments, the control unit 1020 is used to: determine the output power of the battery; when 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 load of the coolant cooling system, and the thermal management system includes a coolant cooling system and a refrigerant cooling system.

[0236] In some embodiments, the control unit 1020 discharges the low voltage power supply to an over-discharge state.

[0237] In some embodiments, the control unit 1020 is used to determine whether the battery is in a non-charging state, wherein the first status information also includes information indicating whether the battery is in a charging state or a non-charging state; or, when the battery is in a charging state, control the battery to stop charging.

[0238] It should be understood that the above and other operations and / or functions of each module in the battery thermal anomaly control device 1000 are to achieve Figures 3 to 9 For the sake of brevity, the corresponding processes in each method are not repeated here.

[0239] Fig.11 FIG. 1 is a schematic block diagram of a battery thermal anomaly control device 1000 according to an embodiment of the present application. Fig.11 As shown, the control device 1000 includes a processor 1110 and a memory 1120, wherein the memory 1120 is used to store instructions, and the processor 1110 is used to read the instructions and execute the methods of the various embodiments of the present application based on the instructions.

[0240] The memory 1120 may be a separate device independent of the processor 1110 , or may be integrated into the processor 1110 .

[0241] Alternatively, if Fig.11 As shown, the battery thermal anomaly control device 1000 may further include a transceiver 1130, and the processor 1110 may control the transceiver 1130 to communicate with other devices. Specifically, information or data may be sent to other devices, or information or data sent by other devices may be received.

[0242] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor may be a general processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined to perform. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0243] 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 erasable programmable ROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM), which is 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), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0244] Optionally, an embodiment of the present application further provides an electrical device, which includes a battery, a thermal management system of the battery, and a control device provided in an embodiment of the present application.

[0245] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0246] Optionally, the computer-readable storage medium can be applied to the battery thermal anomaly control device in the embodiment of the present application, and when the computer program runs on the computer, it enables the computer to execute the corresponding processes implemented by the control device in the various methods of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0247] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0248] Optionally, the computer program product can be applied to the battery thermal anomaly control device in the embodiment of the present application, and when the computer program instructions are run on a computer, the computer executes the corresponding processes implemented by the battery thermal anomaly control device in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0249] The embodiment of the present application also provides a computer program.

[0250] Optionally, the computer program can be applied to the battery thermal anomaly control device in the embodiment of the present application. When the computer program is run on a computer, the computer executes the corresponding processes implemented by the battery thermal anomaly control device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0251] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0252] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0253] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection involved in the embodiments of the present application can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0254] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0255] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0256] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0257] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. 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 for controlling battery thermal anomaly, characterized in that: The method comprises: Acquiring first status information, wherein the first status information includes information indicating that a thermal abnormality occurs in the battery; Controlling the battery to power on or keep it powered on; Acquire second state information, where the second state information includes information indicating a state of the vehicle, where the state of the vehicle includes a non-operating state or an operating state; When the vehicle is in a non-operating state, controlling the battery to discharge to a thermal management system of the battery; or, When the vehicle is in operation, controlling the battery to discharge to the thermal management system, and controlling the battery to discharge to the power system of the vehicle; Before controlling the battery to discharge to the thermal management system of the battery, the method further includes: Determining the output power of the battery; Controlling the battery to discharge into the thermal management system includes: 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, controlling the battery to discharge to the coolant cooling system; or, When the output 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.

2. The control method according to claim 1, characterized in that: The method further comprises: Acquiring third state information, wherein the third state information includes information indicating that the battery changes from a thermal abnormal state to a thermal stable state; Controlling the battery to power off.

3. The control method according to claim 1, characterized in that: The method further comprises: Acquire third state information and fourth state information, wherein the third state information includes information indicating that the battery changes from a thermal abnormality state to a thermal stability state, and the fourth state information includes information indicating that the vehicle changes from a running state to a non-running state; Controlling the battery to power off.

4. The control method according to claim 1, characterized in that: Controlling the battery to discharge into the thermal management system includes: The battery is controlled to discharge toward a first load of the thermal management system.

5. The control method according to claim 1, characterized in that: Controlling the battery to discharge into the thermal management system includes: controlling the battery to discharge into a low voltage power source of the vehicle; and, The low voltage power source is controlled to discharge to a second load of the thermal management system.

6. The control method according to claim 1, characterized in that: The method further comprises: In the case that the battery cannot be controlled to be powered on or is in a powered-on state, the low-voltage power supply of the vehicle is controlled to discharge to the thermal management system.

7. The control method according to claim 6, characterized in that: The controlling the low-voltage power supply of the vehicle to discharge to the thermal management system comprises: The low voltage power source is controlled to discharge to a second load of the thermal management system.

8. The control method according to claim 1, characterized in that: Before controlling the battery to discharge to the thermal management system of the battery, the method further includes: Determining the output power of the battery; The method further comprises: When the output power of the battery is less than or equal to the first power, the low-voltage power supply of the vehicle is controlled to discharge to the coolant cooling system, and the thermal management system includes the coolant cooling system and the refrigerant cooling system.

9. The control method according to any one of claims 6 to 8, characterized in that: The low voltage power supply is discharged to an over-discharge state.

10. The control method according to claim 1, characterized in that: 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 for indicating that the battery is in a charging state or a non-charging state; or, When the battery is in a charging state, the battery is controlled to stop charging.

11. A battery thermal anomaly control device, characterized in that: The device comprises: an acquiring unit, configured to acquire first status information, wherein the first status information includes information indicating that a thermal abnormality occurs in the battery; A control unit, used for controlling the battery to be powered on or to remain powered on; The acquisition unit is used to acquire second state information, wherein the second state information includes information indicating a state of the vehicle, and the state of the vehicle includes a non-operating state or an operating state; The control unit is used to control the battery to discharge to the thermal management system of the battery when the vehicle is in a non-operating state; or When the vehicle is in operation, controlling the battery to discharge to the thermal management system, and controlling the battery to discharge to the power system of the vehicle; The control unit is used to determine the output power of the battery before controlling the battery to discharge to the thermal management system of the battery; The control unit is used to control the battery to discharge to the coolant 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 When the output 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.

12. The control device according to claim 11, characterized in that: The acquisition unit is used to acquire third state information and fourth state information, the third state information includes information indicating that the battery changes from a thermal runaway state to a non-thermal runaway state, and the fourth state information includes information indicating that the vehicle changes from a running state to a non-running state; The control unit is used to control the battery to power off.

13. The control device according to claim 11, characterized in that: The control unit is used to control the low-voltage power supply of the vehicle to discharge to the thermal management system when the battery cannot be powered on or is in a powered-on state.

14. The control device according to claim 13, characterized in that: The control unit is used to control the low-voltage power supply to discharge to the second load of the thermal management system.

15. The control device according to claim 13, characterized in that: The low voltage power supply is discharged to an over-discharge state.

16. A battery thermal anomaly control device, characterized in that: The control device comprises a memory and a processor, wherein the memory is used to store instructions, and the processor is used to read the instructions and execute the control method according to any one of claims 1 to 10 according to the instructions.

17. A vehicle, characterized in that: The vehicle comprises a battery, a thermal management system for the battery, and a control device according to any one of claims 11 to 16.

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