Battery, and temperature regulation method and device

Abstract

The embodiments of the present application provide a battery, and a temperature regulation method and device, and can effectively reduce adverse effects caused after a battery is abnormal. The battery comprises: a battery cell; and a temperature regulation device which is used for outputting a fluid to the battery cell when a battery state parameter of the battery cell reaches a threshold value, wherein the fluid is used for regulating the temperature of the battery cell, and the battery state parameter comprises temperature and / or voltage.

Description

Battery, temperature regulation method and device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application 202311744596.1, filed on December 15, 2023, entitled “Battery, Temperature Regulation Method and Device,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery, a temperature regulation method and a device. Background Art

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become a crucial component of the industry's sustainable development. Battery technology, in turn, is a crucial factor in the development of electric vehicles.

[0005] During battery use, the battery may experience thermal runaway due to temperature increases or other reasons. Therefore, how to reduce the possibility of thermal runaway is an urgent problem to be solved.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a method and device for regulating the temperature of a battery, which can effectively reduce the adverse effects caused by battery abnormalities.

[0008] In a first aspect, a battery is provided, comprising: a battery cell; and a temperature regulating device for outputting a fluid to the battery cell when a battery status parameter of the battery cell reaches a threshold value, wherein the fluid is used to regulate the temperature of the battery cell, and the battery status parameter includes temperature and / or voltage.

[0009] In the embodiments of the present application, a temperature control device is provided in the battery, which is interdependent with the battery cells. This device can be disabled when the battery enters or is about to enter an abnormal state. Specifically, the device can output fluid to the battery cells, which is used to regulate the temperature of the battery cells. This effectively reduces the adverse effects of battery anomalies that occur or are about to occur, such as the possibility of heat diffusion caused by thermal runaway.

[0010] In some possible embodiments, the temperature regulating device is further configured to receive control information, where the control information is used to control the temperature regulating device to output the fluid to the battery cell.

[0011] In the above technical solution, the temperature regulating device receives control information for controlling the output of fluid to the battery cell. In this way, the temperature regulating device can output fluid to the battery cell after receiving the control information, thereby achieving the purpose of regulating the temperature of the battery cell when an abnormal condition occurs in the battery cell or an abnormal condition is about to occur, thereby effectively reducing the adverse effects caused by the battery abnormality or the impending abnormality.

[0012] In some possible embodiments, the temperature regulating device includes an exhaust component and a safety component. The safety component is used to output the fluid when the battery status parameter reaches the threshold value. The fluid enters the battery through the exhaust component to regulate the temperature of the battery cell.

[0013] The above technical solution, by providing a safety component, enables the safety component to output fluid to the battery cell in a timely manner when the battery cell is in an abnormal state or is about to become abnormal, and by providing an exhaust component, the fluid output by the safety component can quickly pass through the exhaust component to reach the interior of the battery, thereby achieving the purpose of timely and effective temperature regulation of the battery cell when the battery cell is in an abnormal state or is about to become abnormal.

[0014] In some possible embodiments, the battery further includes: a supporting member, the supporting member including a flow channel, the inlet of the flow channel being connected to the safety member, and being used to accommodate the fluid after the safety member outputs the fluid; wherein the exhaust member is arranged on the surface of the supporting member, and the exhaust member is connected to the outlet of the flow channel so that the fluid flows into the exhaust member.

[0015] The above technical solution is to provide a support structure including a flow channel, and the inlet of the flow channel is connected to the safety structure, and the outlet is connected to the exhaust structure. In this way, after the safety structure outputs the fluid, the fluid can be contained in the flow channel, so that the fluid output by the safety structure can be fully utilized, reducing the probability of fluid being wasted, thereby being able to quickly adjust the temperature of the battery cell.

[0016] In some possible embodiments, the safety component includes a working fluid manufacturing component and an on-off component, the working fluid manufacturing component is connected to the inlet of the flow channel, and the on-off component is connected to the first end of the working fluid manufacturing component; wherein, when the battery status parameter does not reach the threshold value, the on-off component is in an open state, and when the battery status parameter reaches the threshold value, the on-off component is in a closed state, so that the working fluid manufacturing component inputs the fluid into the flow channel through the inlet.

[0017] In the above technical solution, the safety component includes an on-off component and a working fluid manufacturing component for outputting fluid, and when the battery cell is in a normal state, the on-off component is in a disconnected state, so that the battery can supply power normally with load; when the battery cell is in an abnormal state or is about to be in an abnormal state, the on-off component is in a closed state. In this way, the safety component can be connected to the circuit where the battery cell is located, thereby achieving the purpose of the working fluid manufacturing component inputting the fluid into the flow channel through the inlet.

[0018] In some possible embodiments, the safety component further includes a flow regulating component, one end of which is connected to the 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.

[0019] The above technical solution sets the safety component to include a flow regulating component 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, and when less fluid is needed, the flow rate of the fluid can be set slower through the flow regulating component, thereby effectively realizing flexible output of the fluid.

[0020] In some possible embodiments, the flow regulation component includes an adjustable resistor, the other end of which is connected in series with a battery circuit, and 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.

[0021] Since the flow rate is related to the output power of the working fluid manufacturing component, and the power is related to the voltage, this technical solution sets the flow regulating component to include an adjustable resistor, and adjusts the output power of the working fluid manufacturing component by adjusting the voltage of the battery circuit, thereby achieving the purpose of regulating the flow rate of the fluid. 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 that after the battery cell fails, the battery voltage is applied to the two sections of the failed battery cell, thereby causing adverse effects.

[0022] In some possible embodiments, the supporting member is a crossbeam and / or a longitudinal beam of the battery, and the flow channel is provided inside the crossbeam and / or inside the longitudinal beam.

[0023] The above technical solution sets the supporting structure to include the crossbeams and / or longitudinal beams of the battery, that is, reuses the original structural parts of the battery. On the one hand, it reduces the production cost of the battery; on the other hand, it reduces the occupancy rate of the support structure to the battery space, which can effectively reduce the size of the battery.

[0024] In some possible embodiments, the battery further includes: a receiving cavity, wherein the temperature adjustment device is disposed in an area of ​​the receiving cavity where the battery cell is not disposed.

[0025] The above technical solution places the temperature control device in an area of ​​the electrical cavity where no battery cells are located. This reduces the adverse effects of abnormal or impending abnormal conditions on the temperature control device. For example, the effects of high-temperature, high-pressure gas generated by a battery cell experiencing thermal runaway on the temperature control device can be reduced.

[0026] In a second aspect, a temperature regulation method is provided, which is applied to a temperature regulation device, and the method includes: determining whether a battery status parameter of a battery cell reaches a threshold value, the battery status parameter including temperature and / or voltage; when the battery status parameter of the battery cell reaches the threshold value, outputting a fluid to the battery cell, the fluid being used to regulate the temperature of the battery cell.

[0027] In some possible embodiments, the method further includes: receiving control information, where the control information is used to control the temperature regulating device to output fluid to the battery cell.

[0028] In some possible embodiments, the method further includes: adjusting the flow rate of the fluid during the process of outputting the fluid.

[0029] In some possible embodiments, the temperature regulating device is connected in series with a battery circuit, and regulating the flow rate of the fluid during the process of outputting the fluid includes: regulating the flow rate of the fluid by controlling the voltage of the battery circuit.

[0030] In a third aspect, a temperature regulation device is provided, comprising: a determination unit for determining whether a battery status parameter of a battery cell reaches a threshold value, wherein the battery status parameter includes temperature and / or voltage; and an output unit for outputting a fluid to the battery cell when the battery status parameter reaches the threshold value, wherein the fluid is used to regulate the temperature of the battery cell.

[0031] In some possible embodiments, the temperature regulating device further includes: a communication unit, configured to receive control information, where the control information is used to control the output unit to output fluid to the battery cell.

[0032] In some possible embodiments, the temperature regulating device further includes: a regulating unit, configured to regulate a flow rate of the fluid during the process of the output unit outputting the fluid.

[0033] In some possible embodiments, the temperature regulating device is connected in series with a battery circuit, and the regulating unit is specifically configured to regulate the flow rate of the fluid by controlling the voltage of the battery circuit.

[0034] In a fourth aspect, a temperature control device is provided, comprising a processor and a memory, wherein 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 above-mentioned first aspect or its various implementations.

[0035] In a fifth aspect, a computer-readable storage medium is provided for storing a computer program, which enables a computer to execute the method in the above-mentioned first aspect or its various implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0037] In the drawings, the drawings are not drawn to scale.

[0038] FIG1 is a schematic structural diagram of a battery according to an embodiment of the present application.

[0039] FIG2 is a schematic structural diagram of a battery cell according to an embodiment of the present application.

[0040] FIG3 is a schematic diagram of a temperature adjustment device according to an embodiment of the present application adjusting the temperature of a battery cell based on received control information.

[0041] FIG4 is a schematic diagram of another temperature adjustment device according to an embodiment of the present application adjusting the temperature of a battery cell based on received control information.

[0042] FIG5 is a schematic diagram of a temperature adjustment device according to an embodiment of the present application adjusting the temperature of a battery cell based on acquired status information of the battery cell.

[0043] FIG6 is a perspective view of a temperature regulating device according to an embodiment of the present application.

[0044] FIG7 is a plan view corresponding to FIG6 .

[0045] FIG8 is a cross-sectional view of a beam according to an embodiment of the present application.

[0046] FIG9 is an enlarged view of point A in FIG8 .

[0047] FIG10 is a schematic connection diagram of the safety component and the battery circuit when the current regulation assembly includes an adjustable resistor.

[0048] FIG11 is a schematic flow chart of a temperature adjustment method according to an embodiment of the present application.

[0049] FIG12 is a schematic block diagram of a temperature regulating device according to an embodiment of the present application.

[0050] FIG13 is a schematic block diagram of a temperature regulating device according to an embodiment of the present application. DETAILED DESCRIPTION

[0051] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise specified, "plurality" means more than two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are merely for the purpose of facilitating the description of this application and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0054] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0055] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become a crucial component of the industry's sustainable development. Battery technology, in turn, is a crucial factor in the development of electric vehicles.

[0056] During the use of the battery, the battery may be prone to thermal runaway due to the increase in battery temperature or other reasons.

[0057] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0058] Battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the present application does not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, and the present application does not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the present application does not limit this.

[0059] A battery cell can include an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive and negative electrode sheets to operate.

[0060] During the use of the battery, the battery may be prone to thermal runaway due to the increase in battery temperature or other reasons.

[0061] In view of this, an embodiment of the present application provides a battery comprising a temperature regulating device, which is configured to output a fluid to a battery cell when a battery state parameter of the battery cell reaches a threshold value, wherein the fluid is used to regulate the temperature of the battery cell. In this embodiment of the present application, by providing a temperature regulating device in the battery that is interdependent with the battery cell, the temperature regulating device can be stopped when the battery enters or is about to enter an abnormal state. That is, the temperature regulating device can output a fluid to the battery cell, and the output fluid is used to regulate the temperature of the battery cell. This effectively reduces the adverse effects caused by an abnormality or an impending abnormality in the battery, such as effectively reducing the possibility of heat diffusion caused by thermal runaway in the battery.

[0062] The technical solutions described in the embodiments of the present application are applicable to various battery-using devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0063] FIG1 is a schematic diagram of the structure of a battery 10 according to one embodiment of the present application. The battery 10 may include a battery cell 20 and a temperature control device 30. The temperature control device 30 may be configured to output a fluid to the battery cell 20 when a battery state parameter of the battery cell 20 reaches a threshold value. The fluid is used to regulate the temperature of the battery cell 20.

[0064] Battery state parameters may include temperature and / or voltage. In addition, battery state parameters may also include pressure, stress, or characteristic gas.

[0065] It should be understood that when the battery status parameter reaches the threshold, it indicates that the battery cell 20 has experienced an abnormality or is about to experience an abnormality, for example, thermal runaway has occurred or is about to occur.

[0066] Optionally, the temperature control device 30 can output fluid to the battery cells 20 based on the received power. The power received by the temperature control device 30 can be released by the battery 10. The temperature control device 30 receiving the power released by the battery 10 can be understood as the battery 10 supplying power to the temperature control device 30. This technical solution enables the temperature control device 30 to output fluid to the battery cells 20 based on the received power released by the battery 10, thereby recycling the power released by the battery 10 and effectively conserving resources.

[0067] Alternatively, the electricity received by the temperature regulating device 30 may be released by other devices, such as other batteries other than the battery 10 .

[0068] Temperature regulation can include heating or cooling the battery cells 20. For example, to cool or reduce the temperature of the battery cells 20, the temperature control device 30 can output a fluid to the battery cells 20 to lower the temperature of the battery cells 20. In this case, the temperature control device 30 can also be referred to as a cooling component, cooling system, or cooling plate, and the fluid it outputs can also be referred to as a cooling medium, cooling fluid, or working medium. More specifically, it can be referred to as a coolant or cooling gas. The cooling medium can specifically be water or a mixture of water and ethylene glycol.

[0069] Optionally, the battery cells 20 regulated by the temperature regulating device 30 may include only the battery cells 20 whose battery status parameters reach the threshold, or may include the battery cells whose battery status parameters reach the threshold and the battery cells near the battery cells, or may include all the battery cells included in the battery.

[0070] The number of battery cells 20 can be set to any value based on different power requirements. Multiple battery cells 20 can be connected in series, parallel, or in a hybrid manner to achieve higher capacity or power. Since each battery 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is not limited and can be set according to requirements.

[0071] As shown in FIG2 , a schematic diagram of the structure of a battery cell 20 according to an embodiment of the present application is shown. The battery cell 20 includes one or more electrode assemblies 22, a shell 211, and a cover plate 212. The shell 211 and the cover plate 212 form an outer shell or battery case 21. The walls of the shell 211 and the cover plate 212 are collectively referred to as the walls of the battery cell 20. The shell 211 is determined by the shape of the one or more electrode assemblies 22 after assembly. For example, the shell 211 can be a hollow rectangular parallelepiped, a cube, or a cylinder, and one of the faces of the shell 211 has an opening so that the one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow rectangular parallelepiped or a cube, one of the planes of the shell 211 is an open face, i.e., the plane has no walls, allowing the inside and outside of the shell 211 to communicate. When the shell 211 is a hollow cylinder, the end face of the shell 211 is an open face, i.e., the end face has no walls, allowing the inside and outside of the shell 211 to communicate. 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 electrolyte solution.

[0072] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the cover plate 212. The cover plate 212 is typically flat, with the two electrode terminals 214 secured to the flat surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member 23, also known as a current collecting member 23, which is located between the cover plate 212 and the electrode assembly 22 and electrically connects the electrode assembly 22 to the electrode terminals 214.

[0073] As shown in FIG2 , each electrode assembly 22 has a first electrode tab 221a and a second electrode tab 222a. The polarity of the first electrode tab 221a and the second electrode tab 222a are opposite. For example, when the first electrode tab 221a is a positive electrode tab, the second electrode tab 222a is a negative electrode tab. The first electrode tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal via a connecting member 23, and the second electrode tab 212a of one or more electrode assemblies 22 is connected to another electrode terminal via another connecting member 23. For example, the positive electrode terminal 214a is connected to the positive electrode tab via one connecting member 23, and the negative electrode terminal 214b is connected to the negative electrode tab via another connecting member 23.

[0074] In the battery cell 20 , the electrode assembly 22 can be provided as a single one or multiple ones according to actual use requirements. As shown in FIG. 2 , four independent electrode assemblies 22 are provided in the battery cell 20 .

[0075] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

[0076] In the embodiment of the present application, by providing a temperature control device 30 in the battery 10 and attached to the battery cell 20, the temperature control device 30 can be stopped when the battery 10 enters or is about to enter an abnormal state. That is, the temperature control device 30 can output 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 by abnormal or impending abnormal conditions of the battery 10 can be effectively reduced, such as the possibility of heat diffusion caused by thermal runaway of the battery 10.

[0077] In some embodiments, the battery 10 may further include a receiving cavity, in which both the battery cell 20 and the temperature adjustment device 30 are disposed. The temperature adjustment device 30 is disposed in an area of ​​the receiving cavity where the battery cell 20 is not disposed.

[0078] Optionally, the temperature adjustment device 30 and the battery cell 20 may be arranged in contact with each other or not in contact with each other.

[0079] This technical solution places the temperature control device 30 in an area of ​​the electrical cavity where no battery cells 20 are located. This reduces the adverse effects of abnormal or impending abnormal conditions on the temperature control device 30. For example, the effects of high-temperature, high-pressure gas generated by a battery cell 20 experiencing thermal runaway on the temperature control device 30 can be reduced.

[0080] In some embodiments, the temperature regulating device 30 may be configured to receive control information, where the control information is used to control the temperature regulating device 30 to output fluid to the battery cells 20 .

[0081] As an example, the battery 10 may include a battery management system (BMS), which can monitor the battery status parameters of the battery cells 20. If the BMS determines that the battery 10 is in an abnormal state or is about to be in an abnormal state based on the monitored battery status parameters of the battery cells 20, it can send control information to the temperature adjustment device 30.

[0082] Optionally, the temperature control device 30 can communicate with the BMS via wired or wireless communication. Wired communication methods may include, for example, control area network (CAN) communication or daisy chain communication. Wireless communication methods may include, for example, Bluetooth communication, wireless fidelity (WIFI) communication, ZigBee communication, and other methods, which are not limited herein.

[0083] As shown in Figure 3, the BMS may include a monitoring unit and a control unit. The monitoring unit is used to monitor the battery status parameters of the battery cell 20 in real time and feed back the monitored battery status parameters to the control unit. After receiving the battery status 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 adjustment device 30 to respond. For example, control information is sent to the temperature adjustment device 30. After receiving the control information, the temperature adjustment device 30 outputs fluid to the battery cell 20, ultimately allowing the battery 10 to reach a stable and controllable state.

[0084] Alternatively, as shown in Figure 4, the BMS may include a control unit. When a battery cell 20 experiences or is about to experience an abnormal state, the battery state parameters of the battery cell 20 may trigger the control unit to control the temperature control device 30 in response. For example, control information may be sent to the temperature control device 30. Upon receiving the control information, the temperature control device 30 outputs fluid to the battery cell 20, ultimately bringing the battery 10 to a stable, controllable state.

[0085] As another example, the control information may include battery status parameters of the battery cell 20. For example, as shown in FIG5 , when the battery cell 20 is in an abnormal state or is about to be in an abnormal state, the battery status parameters of the battery cell 20 may directly trigger the temperature regulating device 30 to respond, so that the temperature regulating device 30 promptly outputs fluid to the battery cell 20.

[0086] In this technical solution, the control information includes the battery status parameters of the battery cells 20. That is, the battery status parameters of the battery cells 20 directly trigger the temperature control device 30 to respond. This reduces the time spent on information exchange between the temperature control device 30 and other components, greatly reducing the time spent on adjusting the temperature of the battery cells 20 and improving adjustment efficiency, allowing the battery 10 to reach a normal, temperature-controlled state in a shorter time.

[0087] Optionally, as shown in Figures 6 and 7, in an embodiment of the present application, the temperature regulating device 30 may include an exhaust component 310 and a safety component. The safety component is used to output fluid when the battery status parameter reaches a threshold value, and the fluid enters the interior of the battery 10 through the exhaust component 310 to regulate the temperature of the battery cell 20.

[0088] This technical solution, by providing a safety component, enables the safety component to promptly output fluid to the battery cell 20 when the battery cell 20 is in an abnormal state or is about to be in an abnormal state, and by providing an exhaust component 310, the fluid output by the safety component can quickly pass through the exhaust component 310 to reach the interior of the battery 10, thereby achieving the purpose of timely and effective temperature regulation of the battery cell 20 when the battery cell 20 is in an abnormal state or is about to be in an abnormal state.

[0089] The exhaust component 310 may include an exhaust hole, and the shape of the exhaust hole may be, for example, circular, trapezoidal, rectangular, or irregular.

[0090] As shown in Figures 8 and 9, the battery 10 may further include a seal 320 that covers the vent member 310 and is configured to be destroyed when a battery status parameter reaches a threshold value, allowing fluid to enter the interior of the battery 10 through the vent hole. Specifically, when the battery status parameter reaches the threshold value, the high-temperature and high-pressure gas generated by the battery cell 20 may destroy the seal 320, allowing the fluid to enter the interior of the battery 10 through the vent hole.

[0091] In the above technical solution, the battery 10 further includes a seal 320 for covering the vent member 310. This improves the airtightness of the battery 10 when the battery 10 is in a normal state. Furthermore, the seal 320 is configured to be destroyed when the battery cell 20 is in an abnormal state or is about to be in an abnormal state, so that the fluid output by the safety member can reach the interior of the battery 10 in a timely manner to regulate the temperature of the battery cell 20, thereby improving the efficiency of regulating the temperature of the battery cell 20.

[0092] The sealing member 320 may include a film. Optionally, the film may be a temperature-resistant film, for example, capable of withstanding temperatures of 100° C. or even higher. Exemplarily, the film may include, but is not limited to, polypropylene carbonate (PPC) plastic.

[0093] The seal 320 is configured to include a thin film. Since the thin film is relatively small in volume and mass, the mass energy density and volume energy density of the battery 10 can be effectively improved.

[0094] In the case where the fluid is liquid, the battery 10 may further include a discharge hole so that the liquid output by the temperature adjustment device 30 can be discharged from the interior of the battery 10 through the discharge hole. In this way, the effects of the residual liquid in the battery 10 on the battery 10, such as causing a short circuit in the battery 10, can be reduced.

[0095] Furthermore, the battery 10 may further include a support member 330, which includes a flow channel, the inlet of which is connected to the safety member and is used to receive the fluid after the safety member outputs the fluid. A vent member 310 may be disposed on a surface of the support member 330 and connected to the outlet of the flow channel to allow the fluid to flow into the vent member 310.

[0096] This technical solution is achieved 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 being wasted, thereby enabling the temperature of the battery cell 20 to be quickly adjusted.

[0097] As an example, the support member 330 may include the crossbeam 331 and / or longitudinal beam 332 of the battery 10. For example, as shown in FIG7 , the support member 330 includes the crossbeam 331 and longitudinal beam 332. The crossbeam 331 and / or longitudinal beam 332 may have flow channels disposed therein. The internal flow channels may be fully connected, meaning that all flow channels are interconnected.

[0098] Optionally, all parts of the cross beam 331 may be provided with flow channels, or flow channels may be provided inside part of the cross beam 331. Similarly, all parts of the longitudinal beam 332 may be provided with flow channels, or flow channels may be provided inside part of the longitudinal beam 332.

[0099] Specifically, when the battery cell 20 experiences thermal runaway or is about to experience thermal runaway, the high temperature generated by the thermal runaway destroys the thin film on the surface of the exhaust hole. Then, the fluid output by the safety component can pass through the flow channel of the crossbeam 331 and / or the longitudinal beam 332, and reach the interior of the battery 10 through the exhaust holes on the surface of the crossbeam 331 and / or the exhaust holes on the surface of the longitudinal beam 332, thereby achieving the purpose of cooling and reducing the possibility of further heat diffusion of the battery 10.

[0100] This technical solution sets the support member 330 as the crossbeam 331 and / or longitudinal beam 332 of the battery 10, that is, reuses the original structural parts of the battery 10. On the one hand, it reduces the production cost of the battery 10; on the other hand, it reduces the space occupied by the support member 330 of the battery 10, which can effectively reduce the size of the battery 10.

[0101] In some possible embodiments, referring again to FIG6 and FIG7 , the safety component may include a working fluid production assembly 340 and a switching assembly 350. The working fluid production assembly 340 is connected to the inlet of the flow channel, and the switching assembly 350 is connected to the first end of the working fluid production assembly 340. When the battery status parameter does not reach a threshold value, the switching assembly 350 is in an open state; when the battery status parameter reaches the threshold value, the switching assembly 350 is in a closed state, so that the working fluid production assembly can input the fluid into the flow channel through the inlet of the flow channel.

[0102] In the above technical solution, the safety component includes an on-off component 350 and a working fluid manufacturing component 340 for outputting fluid, and when the battery cell 20 is in a normal state, the on-off component 350 is in a disconnected state, so that the battery 10 can be normally loaded and supplied with power. When the battery cell 20 is in an abnormal state or is about to be in an abnormal state, the on-off component 350 is in a closed state. In this way, the safety component can be connected to the circuit where the battery cell 20 is located, thereby achieving the purpose of the working fluid manufacturing component 340 inputting the fluid into the flow channel through the inlet.

[0103] The working fluid production component is a device for producing or preparing a fluid. Optionally, the working fluid production component 340 may include but is not limited to a water pump, an evaporator, or a compressor.

[0104] The on / off component 350 is an electronic component that controls whether current flows in a circuit. For example, it opens the circuit (allows current to flow) when needed and closes the circuit (blocks current from flowing) when not needed. Alternatively, the on / off component 350 can be a switch, such as a transistor, a field effect transistor (FET), or an insulated gate bipolar transistor (IGBT). Alternatively, the on / off component 350 can be a relay or a contactor.

[0105] The BMS can control the on / off assembly 350 to shut down or close. For example, if the BMS detects that the battery status parameters of the battery cell 20 have not reached a threshold, the on / off assembly 350 can be controlled to be in the open state; if the BMS detects that the battery status parameters of the battery cell 20 have reached a threshold, the on / off assembly 350 can be controlled to be in the closed state. Alternatively, if the battery status parameters of the battery cell 20 have reached a threshold, high-temperature, high-pressure gas can cause the on / off assembly 350 to switch from the open state to the closed state.

[0106] For example, when the battery status parameters do not reach the threshold, that is, when the vehicle is in normal use, the on-off assembly 350 is in the off state, and the battery 10 is supplying power normally. When the battery 10 is or is about to be in an abnormal state, such as thermal runaway, the BMS controls the on-off assembly 350 to switch from the off state to the closed state, and the conventional relay is disconnected. The temperature adjustment device 30 is connected to the battery circuit, the battery 10 discharges, and the working fluid production assembly 340 outputs fluid to the battery cell 20.

[0107] It should be noted that when the on / off assembly 350 is in the closed state, that is, when the temperature adjustment device 30 is connected to the battery circuit, the battery 10 can continue to self-discharge at a low power level. In this way, the battery 10 can be slowly discharged, gradually bringing the battery 10 to a low power state for subsequent processing.

[0108] Typically, the total amount of fluid is fixed. Therefore, in order to rationally use the fluid, the safety component may further include a flow regulating assembly 360, one end of which is connected to the second end of the working fluid manufacturing assembly 340, for regulating the flow rate of the fluid during the process of the working fluid manufacturing assembly 340 outputting the fluid.

[0109] It can be seen that the working fluid manufacturing component 340 includes three ports, namely a first end, a second end and an outlet for outputting fluid, wherein the outlet is connected to the inlet of the flow channel.

[0110] The above technical solution sets the safety component 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 flexible output of the fluid.

[0111] Optionally, the current regulating component 360 may include a resistor. For example, the current regulating component 360 may be an adjustable resistor.

[0112] When the flow regulating component 360 is an adjustable resistor, as shown in Figure 10, 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.

[0113] Specifically, after the adjustable resistor is connected in series to the battery circuit, the battery circuit can be voltage-divided. The 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 assembly 340, and power is related to voltage. Different voltages in the battery circuit result in different output powers of the working fluid manufacturing assembly 340. The greater the output power, the greater the fluid flow rate; conversely, the smaller the output power, the smaller the fluid flow rate, thereby achieving the purpose of regulating the fluid flow rate.

[0114] Since the velocity of the fluid is related to the output power of the working fluid manufacturing component, and the power is related to the voltage. This technical solution sets the flow regulating component 360 to include an adjustable resistor, and adjusts the output power of the working fluid manufacturing component 340 by adjusting the voltage of the battery circuit, thereby achieving the purpose of regulating the flow rate of the fluid. 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 that after the battery cell 20 fails, the voltage of the battery 10 is applied to both ends of the failed battery cell 20, thereby causing adverse effects.

[0115] In the embodiment of the present application, if the temperature control device 30 outputs fluid to the battery cell 20 based on the received power, and if the power received by the temperature control device 30 meets the first power, the temperature control device 30 may disconnect from the discharge device if the power received by the temperature control device 30 is released by the discharge device. The first power is the power required for the temperature control device 30 to output the fluid.

[0116] The discharge device may be, for example, the battery 10 or may be another battery other than the battery 10 mentioned above.

[0117] Alternatively, when the discharge device is a battery 10, considering that the battery 10 is usually fully charged and the first power is usually relatively low, for example, the amount of power used to output the fluid from the temperature adjustment device 30 may only account for 1% of the battery's power, meaning that the battery 10 still has 99% power remaining. This 99% power may still cause the battery 10 to experience abnormal conditions.

[0118] Therefore, if the amount of electricity received by the temperature control device 30 meets the first power, the temperature control device 30 may continue to receive electricity, for example, until the remaining charge of the battery 10 is less than or equal to the preset charge value. If the amount of electricity received by the temperature control device 30 meets the first power, the temperature control device 30 does not output fluid to the battery cell 20.

[0119] In other words, the thermostat 30 only receives power but does not operate.

[0120] Optionally, the preset power value can ensure that the battery 10 is in a safe state at the current moment and thereafter.

[0121] In the above technical solution, if the amount of electricity received by the temperature regulating device 30 satisfies the power required to output the fluid from the temperature regulating device 30, the temperature regulating device 30 continues to receive electricity. Thus, if the amount of electricity received by the temperature regulating device 30 is equivalent to the amount of electricity released by the battery 10, the amount of electricity in the battery 10 can be slowly reduced, i.e., long-term self-discharge of the battery 10 can be achieved. This can further reduce the amount of electricity in a battery 10 that is in an abnormal state or is about to be in an abnormal state to a safe range, thereby reducing the risk of further deterioration.

[0122] In addition to the devices mentioned above, the battery 10 may also include a housing (or cover). The housing has a hollow interior and houses multiple battery cells 20. Referring again to Figure 1 , the housing may include two parts, referred to herein as a first part 111 and a second part 112, which snap together. The shapes of the first and second parts 111, 112 can be determined based on the combined shape of the multiple battery cells 20. Each of the first and second parts 111, 112 may have a single opening. For example, the first and second parts 111, 112 may each be a hollow cuboid with only one open face. The opening of the first and second parts 111, 112 are positioned opposite each other, and the first and second parts 111, 112 snap together to form a housing with a closed chamber. The housing may include a bottom plate 112a, side plates 112b, and beams. Multiple battery cells 20 are connected in parallel, series, or in a mixed configuration and then placed within the housing formed by the snapping of the first and second parts 111, 112.

[0123] It should be understood that, under the premise of no conflict, the various embodiments and / or technical features in the various embodiments described in this application can be arbitrarily combined with each other, and the technical solutions obtained after the combination should also fall within the scope of protection of this application.

[0124] The battery of the embodiment of the present application is described in detail above, and the temperature regulation method of the embodiment of the present application will be described below. It should be understood that the temperature regulation device of the embodiment of the present application can execute the temperature regulation method of the embodiment of the present application.

[0125] Fig. 11 shows a schematic flow chart of a temperature adjustment method 1100 according to an embodiment of the present application. As shown in Fig. 11 , the method 1100 may include at least part of the following contents.

[0126] S1110 : Determine whether a battery status parameter of a battery cell reaches a threshold value, where the battery status parameter includes temperature and / or voltage.

[0127] S1120: When the battery status parameter reaches a threshold, output a fluid to the battery cell, where the fluid is used to adjust the temperature of the battery cell.

[0128] Optionally, in some embodiments, the method 1100 further includes: receiving control information, where the control information is used to control the temperature regulating device to output fluid to the battery cell.

[0129] Optionally, in some embodiments, method 1100 further includes: adjusting the flow rate of the fluid during the process of outputting the fluid.

[0130] Optionally, in some embodiments, the temperature regulating device is connected in series with the battery circuit to regulate the flow rate of the fluid during the fluid output process, including regulating the flow rate of the fluid by controlling the voltage of the battery circuit.

[0131] It should be understood that the method 1100 shown in FIG. 11 can be executed by the temperature regulating device in the aforementioned embodiment, and for the sake of brevity, it will not be described in detail here.

[0132] It should also be understood that the steps or operations in FIG. 11 are merely examples, and the embodiments of the present application may also perform other operations or variations of the various operations in FIG. 11 .

[0133] FIG12 shows a schematic block diagram of a temperature regulating device 1200 according to an embodiment of the present application. As shown in FIG12 , the temperature regulating device 1200 may include:

[0134] The determining unit 1210 is configured to determine whether a battery status parameter of a battery cell reaches a threshold value, where the battery status parameter includes temperature and / or voltage.

[0135] The output unit 1220 is configured to output fluid to the battery cell, where the fluid is used to adjust the temperature of the battery cell.

[0136] Optionally, in the embodiment of the present application, the temperature regulating device 1200 further includes: a communication unit, configured to receive control information, wherein the control information is used to control the output unit 1220 to output fluid to the battery cell.

[0137] Optionally, in the embodiment of the present application, the temperature regulating device 1200 further includes: a regulating unit, configured to regulate the flow rate of the fluid during the process of the output unit 1120 outputting the fluid.

[0138] Optionally, in an embodiment of the present application, the temperature regulating device 1200 is connected in series with the battery circuit, and the regulating unit is specifically used to regulate the flow rate of the fluid by controlling the voltage of the battery circuit.

[0139] It should be understood that the temperature adjustment device 1200 can implement the corresponding operations in the method 1100, which will not be described here for the sake of brevity.

[0140] Figure 13 is a schematic diagram of the hardware structure of a temperature control device 1300 according to an embodiment of the present application. The temperature control device 1300 includes a memory 1301, a processor 1302, a communication interface 1303, and a bus 1304. The memory 1301, the processor 1302, and the communication interface 1303 are connected to each other via the bus 1304.

[0141] Memory 1301 can be a read-only memory (ROM), a static storage device, or a random access memory (RAM). Memory 1301 can store programs. When the program stored in memory 1301 is executed by processor 1302, processor 1302 and communication interface 1303 are used to perform the various steps of the temperature adjustment method of the embodiment of the present application.

[0142] The processor 1302 can 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 to execute relevant programs to implement the functions required to be performed by the units in the device of the embodiment of the present application, or to execute the temperature regulation method of the embodiment of the present application.

[0143] The processor 1302 may also be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the temperature adjustment method of the embodiment of the present application may be completed by hardware integrated logic circuits in the processor 1302 or software instructions.

[0144] The processor 1302 may also be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA), or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. It may implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software module may be located in a storage medium mature in the art, 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, or the like. The storage medium is located in the memory 1301, and the processor 1302 reads the information in the memory 1301 and, in combination with its hardware, completes the functions required to be executed by the units included in the temperature control device 1300 of the embodiment of the present application, or executes the temperature control method of the embodiment of the present application.

[0145] The communication interface 1303 uses a transceiver device such as, but not limited to, a transceiver to implement communication between the temperature adjustment device 1300 and other devices or a communication network.

[0146] The bus 1304 may include a path for transmitting information between various components of the thermostat 1300 (eg, the memory 1301 , the processor 1302 , and the communication interface 1303 ).

[0147] It should be noted that although the temperature control device 1300 described above only illustrates a memory, a processor, and a communication interface, those skilled in the art will appreciate that, during implementation, the temperature control device 1300 may also include other components necessary for normal operation. Furthermore, those skilled in the art will appreciate that, depending on specific needs, the temperature control device 1300 may also include hardware components that implement other additional functions. Furthermore, those skilled in the art will appreciate that the temperature control device 1300 may include only the components necessary to implement the embodiments of the present application, and need not include all of the components shown in FIG. 13 .

[0148] An embodiment of the present application further provides a computer-readable storage medium for storing a computer program, which is used to execute the methods of the various embodiments of the present application described above.

[0149] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0150] An 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. When the program instructions are executed by a computer, the computer executes the above-mentioned temperature adjustment method.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: Battery cells; The temperature regulating device is used to output fluid to the battery cell when the battery status parameter of the battery cell reaches a threshold value, wherein the fluid is used to regulate the temperature of the battery cell, and the battery status parameter includes temperature and / or voltage.

2. The battery according to claim 1, characterized in that The temperature regulating device is further used to receive control information, and the control information is used to control the temperature regulating device to output the fluid to the battery cell.

3. The battery according to claim 1 or 2, characterized in that: The temperature regulating device includes a gas exhaust component and a safety component. The safety component is used to output the fluid when the battery state parameter reaches the threshold value. The fluid enters the battery through the gas exhaust component to regulate the temperature of the battery cell.

4. The battery according to claim 3, characterized in that The battery also includes: A support member, the support member comprising a flow channel, an inlet of the flow channel being connected to the safety member and used to contain the fluid after the safety member outputs the fluid; The exhaust component is disposed on the surface of the supporting component, and is connected to an outlet of the flow channel so that the fluid flows into the exhaust component.

5. The battery according to claim 4, characterized in that The safety component includes a working fluid manufacturing component and a switching component, wherein the working fluid manufacturing component is connected to the inlet of the flow channel, and the switching component is connected to the first end of the working fluid manufacturing component; Wherein, when the battery status parameter does not reach the threshold value, the on-off component is in an open state, and when the battery status parameter reaches the threshold value, the on-off component is in a closed state, so that the working fluid manufacturing component inputs the fluid into the flow channel through the inlet.

6. The battery according to claim 5, characterized in that The safety component also includes a flow regulating component, one end of which is connected to the second end of the working fluid manufacturing component, and is used to regulate 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 regulating component includes an adjustable resistor, the other end of which is connected in series with a 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.

8. The battery according to any one of claims 4 to 7, characterized in that The supporting member is a cross beam and / or a longitudinal beam of the battery, and the flow channel is arranged 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 also includes: The temperature regulating device is arranged in a region of the accommodating chamber where the battery cell is not arranged.

10. A method for temperature regulation, characterized in that: The method is applied to a temperature regulating device, and the method comprises: Determine whether a battery status parameter of the battery cell reaches a threshold value, wherein the battery status parameter includes temperature and / or voltage; When the battery state parameter of the battery cell reaches the threshold value, a fluid is output to the battery cell, where the fluid is used to adjust the temperature of the battery cell.

11. The method according to claim 10, characterized in that The method further comprises: Control information is received, where the control information is used to control the temperature adjustment device to output fluid to the battery cell.

12. The method according to claim 10 or 11, characterized in that: The method further comprises: During the process of outputting the fluid, the flow rate of the fluid is adjusted.

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

14. A temperature regulating device, characterized in that: include: a determination unit, configured to determine whether a battery status parameter of a battery cell reaches a threshold value, wherein the battery status parameter includes temperature and / or voltage; The output unit is used to output fluid to the battery cell when the battery state parameter reaches the threshold value, and the fluid is used to adjust the temperature of the battery cell.

15. The temperature adjustment device according to claim 14, characterized in that: The temperature regulating device also includes: A communication unit is used to receive control information, wherein the control information is used to control the output unit to The battery cells output a fluid.

16. The temperature adjustment device according to claim 14 or 15, characterized in that: The temperature regulating device also includes: The regulating unit is used to regulate 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, characterized in that: The temperature regulating device is connected in series with the battery circuit, and the regulating unit is specifically used for: The flow rate of the fluid is adjusted by controlling the voltage of the battery circuit.

18. A temperature regulating device, characterized in that: include: Memory, used to store programs; A processor is used to execute the program stored in the memory. When the program stored in the memory is executed, the processor is used to execute the temperature adjustment method according to any one of claims 10 to 13.

19. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the temperature regulation method according to any one of claims 10 to 13.

Images