Battery, temperature adjusting method and device

Abstract

The embodiment of the invention provides a battery, and a temperature adjusting method and device, which can effectively reduce adverse effects caused by abnormity of the battery. The battery includes: a battery cell; the temperature adjusting device is used for outputting fluid to the single battery under the condition that the battery state parameters of the single battery reach a threshold value, the fluid is used for adjusting the temperature of the single battery, and the battery state parameters comprise the temperature and / or the voltage.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery, a method and a device for temperature regulation. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. In this context, electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] During the use of the battery, due to the possible increase in the temperature of the battery or other reasons, the battery is prone to thermal runaway. Therefore, how to reduce the possibility of the battery undergoing thermal runaway is an urgent problem to be solved. Summary of the Invention

[0004] Embodiments of the present application provide a battery, a method and a device for temperature regulation, which can effectively reduce the adverse effects caused after the battery undergoes an abnormality.

[0005] In a first aspect, a battery is provided, including: battery cells; a temperature regulation device configured to output a fluid to the battery cells when the battery state parameters of the battery cells reach a threshold, where the fluid is used to regulate the temperature of the battery cells, and the battery state parameters include temperature and / or voltage.

[0006] In the embodiments of the present application, by providing a temperature regulation device attached to the battery cells in the battery, the temperature regulation device can be activated to work when the battery enters or is about to enter an abnormal state, that is, the temperature regulation device can output a fluid to the battery cells, and the output fluid is used to regulate the temperature of the battery cells. In this way, the adverse effects caused after or about to occur after the battery undergoes an abnormality can be effectively reduced. For example, the possibility of heat diffusion caused after the battery undergoes thermal runaway can be effectively reduced.

[0007] In some possible embodiments, the temperature regulation device is further configured to receive control information for controlling the temperature regulation device to output the fluid to the battery cells.

[0008] In the above technical solution, the temperature regulation device receives control information for controlling it to output a fluid to the battery cells. In this way, after receiving the control information, the temperature regulation device can output a fluid to the battery cells, achieving the purpose of regulating the temperature of the battery cells when the battery cells are in an abnormal condition or about to have an abnormality, thereby effectively reducing the adverse effects caused after or about to occur after the battery undergoes an abnormality.

[0009] In some possible embodiments, the temperature regulating device includes an exhaust member and a safety member. The safety member is configured to output the fluid when the battery state parameter reaches the threshold value. The fluid enters the battery interior via the exhaust member to regulate the temperature of the battery cell.

[0010] In the above technical solution, by providing the safety member, when the battery cell is in an abnormal state or about to have an abnormality, the safety member can timely output the fluid to the battery cell. And by providing the exhaust member, the fluid output by the safety member can quickly reach the battery interior through the exhaust member, achieving the purpose of timely and effectively regulating the temperature of the battery cell when the battery cell is in an abnormal condition or about to be in an abnormal condition.

[0011] In some possible embodiments, the battery further includes a support member. The support member includes a flow channel. The inlet of the flow channel is connected to the safety member and is configured to accommodate the fluid after the safety member outputs the fluid. Wherein, the exhaust member is disposed on the surface of the support member and is connected to the outlet of the flow channel to enable the fluid to flow into the exhaust member.

[0012] In the above technical solution, by providing the support member including the flow channel, and the inlet of the flow channel is connected to the safety member and the outlet is connected to the exhaust member. In this way, after the safety member outputs the fluid, the fluid can be accommodated in the flow channel, enabling the fluid output by the safety member to be fully utilized, reducing the probability of fluid waste, and thus being able to quickly regulate the temperature of the battery cell.

[0013] In some possible embodiments, the safety member includes a working medium manufacturing component and a switching component. The working medium manufacturing component is connected to the inlet of the flow channel, and the switching component is connected to the first end of the working medium manufacturing component. Wherein, when the battery state parameter does not reach the threshold value, the switching component is in an open state, and when the battery state parameter reaches the threshold value, the switching component is in a closed state, so that the working medium manufacturing component inputs the fluid into the flow channel through the inlet.

[0014] In the above technical solution, the safety member includes a switching component and a working medium manufacturing component for outputting the fluid. And when the battery cell is in a normal state, the switching component is in an open state, enabling the battery to supply power with a load normally. When the battery cell is in an abnormal state or about to be in an abnormal state, the switching component is in a closed state. In this way, the safety member can be connected to the circuit where the battery cell is located, achieving the purpose of the working medium manufacturing component inputting the fluid into the flow channel through the inlet.

[0015] In some possible embodiments, the safety component further includes a flow rate adjustment component, one end of the flow rate adjustment component is connected to the second end of the working fluid manufacturing component, and is used to adjust the flow rate of the fluid during the process of the working fluid manufacturing component outputting the fluid.

[0016] In the above technical solution, the safety component is set to include a flow rate adjustment component for adjusting the flow rate of the fluid. In the case of requiring more fluid, the flow rate of the fluid can be set relatively fast through the flow rate adjustment component, while in the case of requiring less fluid, the flow rate of the fluid can be set slower through the flow rate adjustment component, thereby effectively realizing the flexible output of the fluid.

[0017] In some possible embodiments, the flow rate adjustment component includes a variable resistor, the other end of the variable resistor is connected in series with the battery circuit, and the variable resistor is used to adjust the output power of the working fluid manufacturing component by adjusting the voltage of the battery circuit, thereby adjusting the flow rate of the fluid.

[0018] Since the rate of the fluid is related to the output power of the working fluid manufacturing component, and the power is related to the voltage. Therefore, in this technical solution, the flow rate adjustment component is set to include a variable resistor, and the output power of the working fluid manufacturing component is adjusted by adjusting the voltage of the battery circuit, so as to achieve the purpose of adjusting the fluid flow rate. On the one hand, the cost is low, it is easy to implement, and the efficiency is high. On the other hand, the setting of the variable resistor can divide the voltage of the battery circuit, reducing the probability that after a battery cell fails, the voltage of the battery is applied across the two ends of the failed battery cell, thereby causing adverse effects.

[0019] In some possible embodiments, the support component is the cross beam and / or longitudinal beam of the battery, and the flow channel is arranged inside the cross beam and / or inside the longitudinal beam.

[0020] In the above technical solution, the support component is set to include the cross beam and / or longitudinal beam of the battery, that is, the original structural components of the battery are reused. On the one hand, the production cost of the battery is reduced; on the other hand, the occupancy rate of the battery space by the support component is reduced, and the size of the battery can be effectively reduced.

[0021] In some possible embodiments, the battery further includes: a receiving cavity, wherein the temperature adjustment device is arranged in the area of the receiving cavity where no battery cells are arranged.

[0022] In the above technical solution, the temperature adjustment device is arranged in the area of the electrical cavity where no battery cells are arranged. In this way, when a battery cell is in an abnormal state or about to be in an abnormal state, the adverse effect of the battery cell in the abnormal state or about to be in the abnormal state on the temperature adjustment device can be reduced. For example, the influence of the high-temperature and high-pressure gas generated by the battery cell that has thermal runaway on the temperature adjustment device can be reduced.

[0023] In a second aspect, a temperature regulation method is provided. The method is applied to a temperature regulation device and includes: determining whether a battery state parameter of a battery cell reaches a threshold, where the battery state parameter includes temperature and / or voltage; and outputting a fluid to the battery cell when the battery state parameter of the battery cell reaches the threshold, where the fluid is used to regulate the temperature of the battery cell.

[0024] In some possible embodiments, the method further includes: receiving control information for controlling the temperature regulation device to output the fluid to the battery cell.

[0025] In some possible embodiments, the method further includes: regulating a flow rate of the fluid during the process of outputting the fluid.

[0026] In some possible embodiments, the temperature regulation device is connected in series with a battery circuit. During the process of outputting the fluid, regulating the flow rate of the fluid includes: regulating the flow rate of the fluid by controlling the voltage of the battery circuit.

[0027] In a third aspect, a temperature regulation device is provided, including: a determination unit for determining whether a battery state parameter of a battery cell reaches a threshold, where the battery state parameter includes temperature and / or voltage; and an output unit for outputting a fluid to the battery cell when the battery state parameter reaches the threshold, where the fluid is used to regulate the temperature of the battery cell.

[0028] In some possible embodiments, the temperature regulation device further includes: a communication unit for receiving control information for controlling the output unit to output the fluid to the battery cell.

[0029] In some possible embodiments, the temperature regulation device further includes: an adjustment unit for regulating the flow rate of the fluid during the process of the output unit outputting the fluid.

[0030] In some possible embodiments, the temperature regulation device is connected in series with a battery circuit. The adjustment unit is specifically configured to: regulate the flow rate of the fluid by controlling the voltage of the battery circuit.

[0031] In a fourth aspect, a temperature regulation device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call the computer program to execute the method in the first aspect or its various implementation manners described above.

[0032] Fifthly, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method in the first aspect or its various implementation manners described above. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the drawings without creative efforts.

[0034] In the drawings, the drawings are not drawn to actual scale.

[0035] Figure 1 It is a schematic structural diagram of the battery according to the embodiment of the present application.

[0036] Figure 2 It is a schematic structural diagram of the battery cell according to the embodiment of the present application.

[0037] Figure 3 It is a schematic diagram showing that a temperature regulation device according to an embodiment of the present application regulates the temperature of a battery cell based on received control information.

[0038] Figure 4 It is a schematic diagram showing that another temperature regulation device according to an embodiment of the present application regulates the temperature of a battery cell based on received control information.

[0039] Figure 5 It is a schematic diagram showing that a temperature regulation device according to an embodiment of the present application regulates the temperature of a battery cell based on acquired state information of the battery cell.

[0040] Figure 6 It is a three-dimensional view of the temperature regulation device according to the embodiment of the present application.

[0041] Figure 7 is Figure 6 corresponding plan view.

[0042] Figure 8 It is a cross-sectional view of the cross beam according to the embodiment of the present application.

[0043] Figure 9 is Figure 8 an enlarged view at A.

[0044] Figure 10 It is a schematic connection diagram of the safety component and the battery circuit in the case where the current regulating component includes a variable resistor.

[0045] Figure 11 It is a schematic flowchart of a temperature regulation method according to an embodiment of the present application.

[0046] Figure 12 It is a schematic block diagram of the temperature regulation device according to an embodiment of the present application.

[0047] Figure 13 It is a schematic block diagram of the temperature regulation device according to an embodiment of the present application. Specific Embodiments

[0048] The following further describes in detail the embodiments of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0049] In the description of the present application, it should be noted that unless otherwise stated, the meaning of "a plurality" is two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0050] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the description and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0051] Referring to "embodiments" in the present application means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0052] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. In this context, electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0053] During the use of the battery, due to the possible increase in the temperature of the battery or other reasons, the battery is prone to thermal runaway.

[0054] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack, etc. The battery generally includes a box body for encapsulating one or more battery cells. The box body can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0055] The battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries, etc., and the embodiments of the present application are not limited thereto. The battery cells can be in the shape of a cylinder, a flat body, a cuboid or other shapes, and the embodiments of the present application are not limited thereto either. The battery cells are generally divided into three types according to the encapsulation method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application are not limited thereto either.

[0056] The battery cell may include an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly works by the movement of metal ions between the positive electrode sheet and the negative electrode sheet.

[0057] During the use of the battery, due to the possible increase in the temperature of the battery or other reasons, the battery is prone to thermal runaway.

[0058] In view of this, the embodiments of the present application provide a battery, which includes a temperature adjustment device. The temperature adjustment device is used to output a fluid to the battery cell when the battery state parameters of the battery cell reach a threshold value, wherein the fluid is used to adjust the temperature of the battery cell. In the embodiments of the present application, by providing a temperature adjustment device attached to the battery cell in the battery, the temperature adjustment device can be activated to work when the battery enters or is about to enter an abnormal state, that is, the temperature adjustment device can output a fluid to the battery cell, and the output fluid is used to adjust the temperature of the battery cell. In this way, the adverse effects caused after or about to occur after the battery goes abnormal can be effectively reduced. For example, the possibility of thermal diffusion caused after the battery undergoes thermal runaway can be effectively reduced.

[0059] The technical solutions described in the embodiments of the present application are applicable to various devices using batteries, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, electric vehicles, ships and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles and spaceships, etc.

[0060] Such as Figure 1As shown in the figure, it is a schematic structural diagram of a battery 10 according to an embodiment of the present application. The battery 10 may include battery cells 20 and a temperature regulation device 30. Among them, the temperature regulation device 30 may be configured to output a fluid to the battery cells 20 when the battery state parameters of the battery cells 20 reach a threshold, and the fluid is used to regulate the temperature of the battery cells 20.

[0061] The battery state parameters may include temperature and / or voltage. In addition, the battery state parameters may further include pressure, stress, or characteristic gas, etc.

[0062] It should be understood that when the battery state parameters reach the threshold, it indicates that the battery cells 20 have already had an abnormality or are about to have an abnormality. For example, thermal runaway has occurred or is about to occur.

[0063] Optionally, the temperature regulation device 30 may output a fluid to the battery cells 20 based on the received electric quantity. The electric quantity received by the temperature regulation device 30 may be released by the battery 10. That the temperature regulation device 30 receives the electric quantity released by the battery 10 can be understood as: the battery 10 supplies power to the temperature regulation device 30. In this technical solution, the temperature regulation device 30 outputs a fluid to the battery cells 20 based on the received electric quantity released by the battery 10, realizing the recycling of the electric quantity released by the battery 10, thereby effectively saving resources.

[0064] Alternatively, the electric quantity received by the temperature regulation device 30 may be released by other devices. Such as other batteries other than the battery 10.

[0065] The regulation of temperature may include heating or cooling the battery cells 20. For example, when cooling or reducing the temperature of the battery cells 20, the temperature regulation device 30 may output a fluid to the battery cells 20 to reduce the temperature of the battery cells 20. At this time, the temperature regulation device 30 may also be referred to as a cooling component, a cooling system, or a cooling plate, etc., and the fluid output by it may also be referred to as a cooling medium or a cooling fluid. More specifically, it may be referred to as a coolant or a cooling gas. The cooling medium may specifically adopt, for example, water, a mixture of water and ethylene glycol, etc.

[0066] Optionally, the battery cells 20 regulated by the temperature regulation device 30 may include only the battery cells 20 whose battery state parameters reach the threshold, or may include the battery cells whose battery state parameters reach the threshold and the battery cells near this battery cell, or may be all the battery cells included in the battery.

[0067] According to different power demands, the number of battery cells 20 can be set to any value. Multiple battery cells 20 can be connected in series, parallel, or a combination of both to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 forms a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to requirements.

[0068] As Figure 2 shown, it is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application. The battery cell 20 includes one or more electrode assemblies 22, a housing 211, and a cover plate 212. The housing 211 and the cover plate 212 form an outer shell or a battery case 21. The wall of the housing 211 and the cover plate 212 are both referred to as the wall of the battery cell 20. The housing 211 is shaped according to the shape after combination of one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid, cube, or cylinder, and one of the faces of the housing 211 has an opening so that one or more electrode assemblies 22 can be placed inside the housing 211. For example, when the housing 211 is a hollow cuboid or cube, one of the planes of the housing 211 is an opening surface, that is, this plane does not have a wall body and thus the inside and outside of the housing 211 communicate with each other. When the housing 211 can be a hollow cylinder, the end face of the housing 211 is an opening surface, that is, this end face does not have a wall body and thus the inside and outside of the housing 211 communicate with each other. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for placing the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolytic solution.

[0069] The battery cell 20 may further include two electrode terminals 214, and the two electrode terminals 214 can be arranged on the cover plate 212. The cover plate 212 is generally in a flat plate shape, and the two electrode terminals 214 are fixed on the flat plate surface of the cover plate 212. The two electrode terminals 214 are a positive electrode terminal 214a and a negative electrode terminal 214b respectively. Each electrode terminal 214 is correspondingly provided with a connection member 23, or can also be called a current collecting member 23, which is located between the cover plate 212 and the electrode assembly 22 and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0070] As Figure 2As shown, each electrode assembly 22 has a first tab 221a and a second tab 222a. The first tab 221a and the second tab 222a have opposite polarities. For example, when the first tab 221a is the positive tab, the second tab 222a is the negative tab. The first tabs 221a of one or more electrode assemblies 22 are connected to an electrode terminal through a connecting member 23, and the second tabs 212a of one or more electrode assemblies 22 are connected to another electrode terminal through another connecting member 23. For example, the positive electrode terminal 214a is connected to the positive tab through a connecting member 23, and the negative electrode terminal 214b is connected to the negative tab through another connecting member 23.

[0071] In the battery cell 20, according to actual usage requirements, the electrode assembly 22 can be set to be single or multiple, such as Figure 2 As shown, there are 4 independent electrode assemblies 22 provided in the battery cell 20.

[0072] A pressure relief mechanism 213 can also be provided on the battery cell 20. The pressure relief mechanism 213 is used to actuate to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0073] In the embodiment of the present application, by providing a temperature regulation device 30 attached to the battery cell 20 in the battery 10, the temperature regulation device 30 can be actuated to work when the battery 10 enters an abnormal state or is about to enter an abnormal state, that is, the temperature regulation device 30 can output a fluid to the battery cell 20, and the output fluid is used to regulate the temperature of the battery cell 20. In this way, the adverse effects caused after the battery 10 has an abnormality or is about to have an abnormality can be effectively reduced. For example, the possibility of heat diffusion caused after the battery 10 has a thermal runaway can be effectively reduced.

[0074] In some embodiments, the battery 10 may further include a receiving cavity, and both the battery cell 20 and the temperature regulation device 30 are provided in the receiving cavity. Among them, the temperature regulation device 30 is provided in the area of the receiving cavity where there is no battery cell 20.

[0075] Optionally, the temperature regulation device 30 and the battery cell 20 can be in contact or not in contact.

[0076] In this technical solution, the temperature regulation device 30 is provided in the area of the electrical cavity where there is no battery cell 20. In this way, when the battery cell 20 is in an abnormal state or about to be in an abnormal state, the adverse effects of the battery cell 20 in the abnormal state or about to be in the abnormal state on the temperature regulation device 30 can be reduced. For example, the influence of the high-temperature and high-pressure gas generated by the battery cell 20 with a thermal runaway on the temperature regulation device 30 can be reduced.

[0077] In some embodiments, the temperature regulation device 30 can be configured to receive control information for controlling the temperature regulation device 30 to output a fluid to the battery cell 20.

[0078] As an example, the battery 10 can include a battery management system (BMS). The BMS can monitor the battery state parameters of the battery cell 20. When the BMS determines based on the monitored battery state parameters of the battery cell 20 that the battery 10 is in an abnormal state or is about to be in an abnormal state, it can send control information to the temperature regulation device 30.

[0079] Optionally, the temperature regulation device 30 can communicate with the BMS in a wired or wireless manner. The wired communication method can include, for example, controller area network (CAN) communication and daisychain communication. The wireless communication methods can include various methods such as Bluetooth communication, wireless fidelity (WIFI) communication, and ZigBee communication, which are not limited herein.

[0080] As Figure 3 shown, the BMS can include a monitoring unit and a control unit. The monitoring unit is configured to monitor the battery state parameters of the battery cell 20 in real time and feedback the monitored battery state parameters to the control unit. After receiving the battery state parameters, the control unit determines whether the battery cell 20 is in an abnormal state or is about to be in an abnormal state. If it is determined that the battery cell 20 is in an abnormal state or is about to be in an abnormal state, the control unit controls the temperature regulation device 30 to respond. For example, it sends control information to the temperature regulation device 30. After receiving the control information, the temperature regulation device 30 outputs a fluid to the battery cell 20, ultimately bringing the battery 10 to a stable and controllable state.

[0081] Alternatively, as Figure 4 shown, the BMS can include a control unit. When the battery cell 20 is in an abnormal state or is about to be in an abnormal state, the battery state parameters of the battery cell 20 can trigger the control unit to control the temperature regulation device 30 to respond. For example, it sends control information to the temperature regulation device 30. After receiving the control information, the temperature regulation device 30 outputs a fluid to the battery cell 20, ultimately bringing the battery 10 to a stable and controllable state.

[0082] As another example, the control information can include the battery state parameters of the battery cell 20. For example, as Figure 5As shown, when the battery cell 20 is in an abnormal state or about to be in an abnormal state, the battery state parameters of the battery cell 20 can directly trigger the temperature regulation device 30 to respond, so that the temperature regulation device 30 can output fluid to the battery cell 20 in a timely manner.

[0083] In this technical solution, the control information includes the battery state parameters of the battery cell 20, that is, the battery state parameters of the battery cell 20 directly trigger the temperature regulation device 30 to respond and work. In this way, the time spent on information interaction between the temperature regulation device 30 and other components is reduced, thereby greatly reducing the time taken to regulate the temperature of the battery cell 20, improving the regulation efficiency, and enabling the battery 10 to reach a normal, temperature-controlled state in a shorter time.

[0084] Optionally, as Figure 6 and Figure 7 shown, in the embodiment of the present application, the temperature regulation device 30 may include an exhaust member 310 and a safety member. The safety member is configured to output fluid when the battery state parameters reach a threshold value. The fluid enters the interior of the battery 10 through the exhaust member 310 to regulate the temperature of the battery cell 20.

[0085] In this technical solution, by setting the safety member, when the battery cell 20 is in an abnormal state or about to be in an abnormal state, the safety member can output fluid to the battery cell 20 in a timely manner. And by setting the exhaust member 310, the fluid output by the safety member can quickly reach the interior of the battery 10 through the exhaust member 310, achieving the purpose of timely and effectively regulating the temperature of the battery cell 20 when the battery cell 20 is in an abnormal condition or about to be in an abnormal state.

[0086] The exhaust member 310 may include exhaust holes, and the shape of the exhaust holes may be, for example, circular, trapezoidal, rectangular or irregular, etc.

[0087] As Figure 8 and Figure 9 shown, the battery 10 may further include a seal 320. The seal 320 covers the exhaust member 310 and is configured to be damaged when the battery state parameters reach a threshold value, so that the fluid can reach the interior of the battery 10 through the exhaust holes. Specifically, when the battery state parameters reach the threshold value, the high-temperature and high-pressure gas generated by the battery cell 20 can damage the seal 320, so that the fluid can reach the interior of the battery 10 through the exhaust holes.

[0088] In the above technical solution, the battery 10 further includes a seal 320 for covering the exhaust member 310. In this way, the airtightness of the battery 10 when it is in a normal state can be improved. Further, the seal 320 is configured to be damaged when the battery cell 20 is in an abnormal state or about to be in an abnormal state, so that the fluid output by the safety member can reach the inside of the battery 10 in time to adjust the temperature of the battery cell 20, thereby improving the efficiency of adjusting the temperature of the battery cell 20.

[0089] The seal 320 may include a film. Optionally, the film may be a heat-resistant film, for example, it can withstand a temperature of 100 °C or even higher. Exemplarily, the film may include, but is not limited to, poly propylenecarbonate (PPC) plastic.

[0090] Setting the seal 320 to include a film can effectively improve the mass energy density and volume energy density of the battery 10 because the film is relatively small in both volume and mass.

[0091] In the case where the fluid is a liquid, the battery 10 may further include a discharge hole to allow the liquid output by the temperature adjustment device 30 to be discharged from the inside of the battery 10 through the discharge hole. In this way, the influence of the residual liquid inside the battery 10 on the battery 10, such as causing a short circuit of the battery 10, can be reduced.

[0092] Further, the battery 10 may further include a support member 330. The support member 330 includes a flow channel. The inlet of the flow channel is connected to the safety member and is used to accommodate the fluid after the safety member outputs the fluid. The exhaust member 310 may be disposed on the surface of the support member 330, and the exhaust member 310 is connected to the outlet of the flow channel to allow the fluid to flow into the exhaust member 310.

[0093] In this technical solution, by providing a support member 330 including a flow channel, with the inlet of the flow channel connected to the safety member and the outlet connected to the exhaust member 310, in this way, after the safety member outputs the fluid, the fluid can be accommodated in the flow channel, so that the fluid output by the safety member can be fully utilized, reducing the probability of fluid waste, and thus the temperature of the battery cell 20 can be adjusted quickly.

[0094] As an example, the support member 330 may include a cross beam 331 and / or a longitudinal beam 332 of the battery 10. For example, as Figure 7 shown, the support member 330 includes a cross beam 331 and a longitudinal beam 332. The inside of the cross beam 331 and / or the longitudinal beam 332 may be provided with a flow channel. The internal flow channel may be a full-pass structure, that is, all the flow channels are connected to each other.

[0095] Optionally, all parts of the cross beam 331 can be provided with flow channels, or flow channels can be provided inside a part of the cross beam 331. Similarly, all parts of the longitudinal beam 332 can be provided with flow channels, or flow channels can be provided inside a part of the longitudinal beam 332.

[0096] Specifically, when the battery cell 20 has a thermal runaway or is about to have a thermal runaway, the high temperature generated by the thermal runaway destroys the film on the surface of the exhaust hole, and then the fluid output by the safety component can pass through the flow channels of the cross beam 331 and / or the longitudinal beam 332, and reach the inside of the battery 10 through the exhaust holes on the surface of the cross beam 331 and / or the exhaust holes on the surface of the longitudinal beam 332, so as to achieve the purpose of cooling and reduce the possibility of further thermal diffusion of the battery 10.

[0097] In this technical solution, the support component 330 is set as the cross beam 331 and / or the longitudinal beam 332 of the battery 10, that is, the original structural components of the battery 10 are reused. On the one hand, the production cost of the battery 10 is reduced; on the other hand, the occupancy rate of the space of the battery 10 by the support component 330 is reduced, and the size of the battery 10 can be effectively reduced.

[0098] In some possible embodiments, referring again to Figure 6 and Figure 7 , the safety component can include a working medium manufacturing component 340 and a switching component 350. The working medium manufacturing component 340 is connected to the inlet of the flow channel, and the switching component 350 is connected to the first end of the working medium manufacturing component 340. Among them, when the battery state parameter does not reach the threshold, the switching component 350 is in the off state; when the battery state parameter reaches the threshold, the switching component 350 is in the closed state, so that the working medium manufacturing component inputs the fluid into the flow channel through the inlet of the flow channel.

[0099] In the above technical solution, the safety component includes a switching component 350 and a working medium manufacturing component 340 that outputs fluid, and the switching component 350 is in the off state when the battery cell 20 is in a normal state, so that the battery 10 can supply power with a load normally. When the battery cell 20 is in an abnormal state or about to be in an abnormal state, the switching component 350 is in the closed state. In this way, the safety component can be connected to the circuit where the battery cell 20 is located, and the purpose of the working medium manufacturing component 340 inputting the fluid into the flow channel through the inlet is achieved.

[0100] Optionally, the working medium manufacturing component 340 can include, but is not limited to, a water pump.

[0101] Optionally, the on-off component 350 can be a switch. The BMS can control the switch to turn off or close. For example, when the BMS detects that the battery state parameter of the battery cell 20 does not reach the threshold, it can control the switch to be in the off state; when the BMS detects that the battery state parameter of the battery cell 20 reaches the threshold, it controls the switch to be in the closed state. Or, when the battery state parameter of the battery cell 20 reaches the threshold, the high-temperature and high-pressure gas can cause the switch to switch from the off state to the closed state.

[0102] For example, when the battery state parameter does not reach the threshold, that is, when the vehicle is in normal use, the on-off component 350 is in the off state, and the battery 10 normally supplies power under load. When the battery 10 has or is about to have an abnormal state, such as thermal runaway, the BMS controls the on-off component 350 to switch from the off state to the closed state and the conventional relay to open, the temperature regulating device 30 is connected to the battery circuit, the battery 10 discharges, and the working fluid manufacturing component 340 outputs fluid to the battery cell 20.

[0103] It should be noted that when the on-off component 350 is in the closed state, that is, when the temperature regulating device 30 is connected to the battery circuit, low-power self-discharge can occur inside the battery 10 all the time. In this way, the power of the battery 10 can be slowly reduced, so that the battery 10 gradually reaches a low-power state for subsequent processing.

[0104] Generally, the total amount of the fluid is fixed. Therefore, in order to use the fluid reasonably, further, the safety component can further include a flow regulating component 360. One end of the flow regulating component 360 is connected to the second end of the working fluid manufacturing component 340, and is used to regulate the flow rate of the fluid during the process of the working fluid manufacturing component 340 outputting the fluid.

[0105] It can be seen that the working fluid manufacturing component 340 includes three ports, namely the first end, the second end, and the outlet for outputting fluid. Among them, the outlet is connected to the inlet of the flow channel.

[0106] In the above technical solution, the safety component is set to include a flow regulating component 360 for regulating the flow rate of the fluid. When more fluid is needed, the flow rate of the fluid can be set faster through the flow regulating component 360, and when less fluid is needed, the flow rate of the fluid can be set slower through the flow regulating component 360, thereby effectively realizing the flexible output of the fluid.

[0107] Optionally, the flow regulating component 360 can include a resistor. For example, the flow regulating component 360 can be a variable resistor.

[0108] When the flow regulating component 360 is a variable resistor, as Figure 10As shown, one end of the adjustable resistor is connected to the working fluid manufacturing component 340, and the other end is connected in series with the battery circuit. The adjustable resistor is used to adjust the output power of the working fluid manufacturing component by adjusting the voltage of the battery circuit, thereby adjusting the flow rate of the fluid.

[0109] Specifically, after the adjustable resistor is connected in series to the battery circuit, the battery circuit can be divided in voltage. Different resistance values of the adjustable resistor result in different voltages in the battery circuit. The flow rate of the fluid is related to the output power of the working fluid manufacturing component 340, and the power is related to the voltage. Different voltages in the battery circuit result in different output powers of the working fluid manufacturing component 340. The greater the output power, the greater the flow rate of the fluid; conversely, the smaller the output power, the smaller the flow rate of the fluid, thus achieving the purpose of adjusting the flow rate of the fluid.

[0110] Since the rate of the fluid is related to the output power of the working fluid manufacturing component, and the power is related to the voltage. In this technical solution, the flow rate adjustment component 360 is set to include an adjustable resistor, and the output power of the working fluid manufacturing component 340 is adjusted by adjusting the voltage of the battery circuit, thereby achieving the purpose of adjusting the fluid flow rate. On the one hand, the cost is low, it is easy to implement, and the efficiency is high. On the other hand, the setting of the adjustable resistor can divide the voltage of the battery circuit, reducing the probability of adverse effects caused by the voltage of the battery 10 being applied across the failed battery cell 20 after the battery cell 20 fails.

[0111] In the embodiment of the present application, if the temperature adjustment device 30 outputs fluid to the battery cell 20 based on the received electric quantity, when the electric quantity received by the temperature adjustment device 30 meets the first power, if the electric quantity received by the temperature adjustment device 30 is released by the discharge device, the temperature adjustment device 30 can disconnect from the discharge device. The first power is the power required for the temperature adjustment device 30 to output fluid.

[0112] The discharge device can be, for example, the battery 10 or other batteries mentioned above other than the battery 10.

[0113] Or, when the discharge device is the battery 10, considering that the battery 10 is usually in a fully charged state, and the first power is usually relatively small. For example, the electric quantity used for the temperature adjustment device 30 to output fluid may only account for 1% of the battery's electric quantity, that is, the battery 10 still has 99% of its electric quantity remaining, and this 99% of the electric quantity may still cause abnormal conditions in the battery 10.

[0114] Therefore, when the power received by the temperature regulation device 30 meets the first power, the temperature regulation device 30 can also continue to receive power. For example, until the remaining power of the battery 10 is less than or equal to the preset power value. Among them, when the power received by the temperature regulation device 30 meets the first power, the temperature regulation device 30 does not output fluid to the battery cell 20.

[0115] In other words, the temperature regulation device 30 only receives power but does not work.

[0116] Optionally, the preset power value can enable the battery 10 to be in a safe state at the current moment and afterwards.

[0117] In the above technical solution, when the power received by the temperature regulation device 30 meets the power for the temperature regulation device 30 to output fluid, the temperature regulation device 30 continues to receive power. In this way, if the power received by the temperature regulation device 30 is the power released by the battery 10, then the power of the battery 10 can be slowly reduced, that is, the long-term self-discharge of the battery 10 can be realized. Furthermore, the power of the battery 10 in an abnormal state or about to be in an abnormal state can be reduced to a safe range, reducing the occurrence of further deterioration events.

[0118] In addition to the devices mentioned above, the battery 10 may further include a box body (or a cover body). The inside of the box body is a hollow structure, and a plurality of battery cells 20 are accommodated in the box body. Referring again to Figure 1 , the box body may include two parts, which are respectively referred to as the first part 111 and the second part 112 here. The first part 111 and the second part 112 are snapped together. The shapes of the first part 111 and the second part 112 may be determined according to the shape of the combination of the plurality of battery cells 20. The first part 111 and the second part 112 may each have an opening. For example, both the first part 111 and the second part 112 may be hollow cuboids and each has only one face as the opening face. The openings of the first part 111 and the second part 112 are arranged opposite to each other, and the first part 111 and the second part 112 are snapped together to form a box body with a closed chamber. Among them, the box body may include a bottom plate 112a, side plates 112b and beams. A plurality of battery cells 20 are placed in the box body formed by snapping the first part 111 and the second part 112 together after being connected in parallel, in series or in a mixed connection.

[0119] It should be understood that on the premise of no conflict, the various embodiments described in this application and / or the technical features in the various embodiments can be arbitrarily combined with each other, and the technical solutions obtained after the combination should also fall within the protection scope of this application.

[0120] The battery according to the embodiments of the present application has been described in detail above. Next, a method for temperature regulation according to the embodiments of the present application will be described. It should be understood that the temperature regulation device in the embodiments of the present application can execute the method for temperature regulation in the embodiments of the present application.

[0121] Figure 11 FIG. shows a schematic flowchart of a method 1100 for temperature regulation according to an embodiment of the present application. As Figure 11 shown, the method 1100 may include at least some of the following.

[0122] S1110: Determine whether the battery state parameters of the battery cell reach a threshold, where the battery state parameters include temperature and / or voltage.

[0123] S1120: When the battery state parameters reach the threshold, output a fluid to the battery cell, and the fluid is used to regulate the temperature of the battery cell.

[0124] Optionally, in some embodiments, the method 1100 further includes: receiving control information, and the control information is used to control the temperature regulation device to output a fluid to the battery cell.

[0125] Optionally, in some embodiments, the method 1100 further includes: regulating the flow rate of the fluid during the process of outputting the fluid.

[0126] Optionally, in some embodiments, the temperature regulation device is connected in series with the battery circuit, and during the process of outputting the fluid, regulating the flow rate of the fluid includes: regulating the flow rate of the fluid by controlling the voltage of the battery circuit.

[0127] It should be understood that Figure 11 the method 1100 shown can be executed by the temperature regulation device in the foregoing embodiments. For the sake of brevity of content, it will not be elaborated here.

[0128] It should also be understood that Figure 11 the steps or operations in Figure 11 are only examples, and the embodiments of the present application can also execute other operations or

[0129] Figure 12 FIG. shows a schematic block diagram of a temperature regulation device 1200 according to an embodiment of the present application. As Figure 12 shown, the temperature regulation device 1200 may include:

[0130] A determination unit 1210, configured to determine whether the battery state parameters of the battery cell reach a threshold, where the battery state parameters include temperature and / or voltage.

[0131] An output unit 1220, configured to output a fluid to the battery cell, and the fluid is used to regulate the temperature of the battery cell.

[0132] Optionally, in the embodiments of the present application, the temperature regulation device 1200 further includes: a communication unit, configured to receive control information for controlling the output unit 1220 to output a fluid to the battery cell.

[0133] Optionally, in the embodiments of the present application, the temperature regulation device 1200 further includes: an adjustment unit, configured to adjust the flow rate of the fluid during the process of the output unit 1120 outputting the fluid.

[0134] Optionally, in the embodiments of the present application, the temperature regulation device 1200 is serially connected to the battery circuit, and the adjustment unit is specifically configured to: adjust the flow rate of the fluid by controlling the voltage of the battery circuit.

[0135] It should be understood that the temperature regulation device 1200 can implement the corresponding operations in the method 1100. For the sake of brevity, it will not be elaborated here.

[0136] Figure 13 FIG. 15 is a schematic hardware structure diagram of the temperature regulation device 1300 according to the embodiments of the present application. The temperature regulation device 1300 includes a memory 1301, a processor 1302, a communication interface 1303, and a bus 1304. Among them, the memory 1301, the processor 1302, and the communication interface 1303 are communicatively connected to each other through the bus 1304.

[0137] The memory 1301 may be a read-only memory (ROM), a static storage device, and a random access memory (RAM). The memory 1301 may store a program. When the program stored in the memory 1301 is executed by the processor 1302, the processor 1302 and the communication interface 1303 are configured to execute the respective steps of the temperature regulation method according to the embodiments of the present application.

[0138] The processor 1302 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), a graphics processing unit (GPU), or one or more integrated circuits, and is configured to execute relevant programs to implement the functions required by the units in the device according to the embodiments of the present application, or execute the temperature regulation method according to the embodiments of the present application.

[0139] The processor 1302 can also be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the temperature regulation method in the embodiments of the present application can be completed by the integrated logic circuit of the hardware in the processor 1302 or the instructions in the form of software.

[0140] The above-mentioned processor 1302 can also be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as being executed by the hardware processor, or executed by a combination of the hardware and software modules in the processor. The software module can be located in a mature storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers, etc. This storage medium is located in the memory 1301, and the processor 1302 reads the information in the memory 1301 and combines its hardware to complete the functions required to be executed by the units included in the temperature regulation device 1300 in the embodiments of the present application, or executes the temperature regulation method in the embodiments of the present application.

[0141] The communication interface 1303 uses a transceiver device such as, but not limited to, a transceiver to achieve communication between the temperature regulation device 1300 and other devices or communication networks.

[0142] The bus 1304 can include a path for transmitting information between various components of the temperature regulation device 1300 (for example, the memory 1301, the processor 1302, the communication interface 1303).

[0143] It should be noted that although the above-mentioned temperature regulation device 1300 only shows the memory, the processor, and the communication interface, in the specific implementation process, those skilled in the art should understand that the temperature regulation device 1300 may also include other devices necessary for normal operation. At the same time, according to specific needs, those skilled in the art should understand that the temperature regulation device 1300 may also include hardware devices for implementing other additional functions. In addition, those skilled in the art should understand that the temperature regulation device 1300 may also only include the devices necessary for implementing the embodiments of the present application, and do not have to include Figure 13 all the devices shown in

[0144] The embodiment of the present application also provides a computer-readable storage medium for storing a computer program, which is used to execute the methods of various embodiments of the present application described above.

[0145] The above computer-readable storage medium may be a transient computer-readable storage medium or a non-transient computer-readable storage medium.

[0146] The embodiment of the present application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to execute the above temperature regulation method.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A battery, characterized in that, Comprising: A battery cell; A temperature regulation device for outputting a fluid to the battery cell when the battery state parameters of the battery cell reach a threshold, the fluid being used to regulate the temperature of the battery cell, the battery state parameters including temperature and / or voltage.

2. The battery according to claim 1, characterized in that, The temperature regulation device is further configured to receive control information for controlling the temperature regulation device to output the fluid to the battery cell.

3. The battery according to claim 1 or 2, characterized in that, The temperature regulation device includes an exhaust member and a safety member, the safety member being configured to output the fluid when the battery state parameters reach the threshold, and the fluid enters the battery interior via the exhaust member to regulate the temperature of the battery cell.

4. The battery according to claim 3, characterized in that, The battery further includes: A support member including a flow channel, an inlet of the flow channel being connected to the safety member for accommodating the fluid after the safety member outputs the fluid; Wherein, the exhaust member is disposed on the surface of the support member, and the exhaust member is connected to an outlet of the flow channel to enable the fluid to flow into the exhaust member.

5. The battery according to claim 4, characterized in that, The safety member includes a working fluid manufacturing component and a switching component, the working fluid manufacturing component being connected to the inlet of the flow channel, and the switching component being connected to a first end of the working fluid manufacturing component; Wherein, when the battery state parameters do not reach the threshold, the switching component is in an open state, and when the battery state parameters reach the threshold, the switching component is in a closed state to enable the working fluid manufacturing component to input the fluid into the flow channel through the inlet.

6. The battery according to claim 5, characterized in that, The safety member further includes a flow rate regulating component, one end of the flow rate regulating component being connected to a second end of the working fluid manufacturing component for regulating the flow rate of the fluid during the process of the working fluid manufacturing component outputting the fluid.

7. The battery according to claim 6, characterized in that, The flow rate regulating component includes a variable resistor, the other end of the variable resistor being connected in series with the battery circuit, and the variable resistor is configured to regulate the output power of the working fluid manufacturing component by regulating the voltage of the battery circuit, thereby regulating the flow rate of the fluid.

8. The battery according to any one of claims 4 to 7, characterized in that, The support member is a cross beam and / or a longitudinal beam of the battery, and the flow channel is disposed inside the cross beam and / or inside the longitudinal beam.

9. The battery according to any one of claims 1 to 8, characterized in that, The battery further includes: A receiving cavity, wherein the temperature regulation device is disposed in an area of the receiving cavity where the battery cell is not provided.

10. A method for temperature regulation, characterized in that, The method is applied to a temperature regulation device, and the method includes: Determining whether the battery state parameters of the battery cell reach a threshold, the battery state parameters including temperature and / or voltage; When the battery state parameters of the battery cell reach the threshold, outputting a fluid to the battery cell, the fluid being used to regulate the temperature of the battery cell.

11. The method according to claim 10, characterized in that, The method further includes: Receiving control information for controlling the temperature regulation device to output a fluid to the battery cell.

12. The method according to claim 10 or 11, characterized in that, The method further includes: Regulating the flow rate of the fluid during the process of outputting the fluid.

13. The method according to claim 12, characterized in that, The temperature regulation device is connected in series with the battery circuit, and regulating the flow rate of the fluid during the process of outputting the fluid includes: Adjust the flow rate of the fluid by controlling the voltage of the battery circuit.

14. A temperature regulation device, characterized in that, Comprising: A determination unit configured to determine whether a battery state parameter of a battery cell reaches a threshold, the battery state parameter including temperature and / or voltage; An output unit configured to output a fluid to the battery cell when the battery state parameter reaches the threshold, the fluid being used to adjust the temperature of the battery cell.

15. The temperature adjustment device according to claim 14, wherein The temperature adjustment device further comprises: A communication unit configured to receive control information for controlling the output unit to output the fluid to the battery cell.

16. The temperature adjustment device according to claim 14 or 15, wherein The temperature adjustment device further comprises: An adjustment unit configured to adjust the flow rate of the fluid during the process of the output unit outputting the fluid.

17. The temperature adjustment device according to claim 16, wherein The temperature adjustment device is connected in series with the battery circuit, and the adjustment unit is specifically configured to: Adjust the flow rate of the fluid by controlling the voltage of the battery circuit.

18. A temperature adjustment device, wherein Comprising: A memory for storing a program; A processor for executing the program stored in the memory, and when the program stored in the memory is executed, the processor is configured to execute the temperature adjustment method according to any one of claims 10 to 13.

19. A computer-readable storage medium, wherein For storing a computer program, the computer program causing a computer to execute the temperature adjustment method according to any one of claims 10 to 13.

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