Battery device, energy storage device, and power consumption device

Abstract

The application discloses a battery device, an energy storage device and a power utilization device, relates to the technical field of batteries, and provides the battery device, which comprises a battery monomer and a support frame. The support frame is internally provided with a containing cavity for placing the battery monomer. The support frame is internally provided with a heat exchange flow channel for containing a heat exchange medium. The heat exchange flow channel is located at the outer side of the containing cavity so that the heat exchange medium exchanges heat with the battery monomer. The heat exchange flow channel is arranged in the support frame, so that the battery monomer is subjected to heat exchange, the heat exchange effect of the battery monomer is improved, the charging and discharging performance and the use safety of the battery device are improved, the integration of the support frame can be improved, a component for subjecting the battery monomer to heat exchange is not needed to be separately arranged, the structure of the battery device is simplified, the miniaturization design of the battery device is realized, and the functionality of the support frame is improved, so that the support frame can have the function of subjecting the battery monomer to heat exchange.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery device, an energy storage device, and an electrical device. Background Technology

[0002] In recent years, new energy vehicles have experienced rapid development. In this field, battery devices, as the power source, play an irreplaceable and crucial role. Among these, battery devices, as core components of new energy vehicles, have high requirements in both performance and size.

[0003] In related technologies, a separate heat exchange component is usually set up in the battery device to exchange heat with the individual battery cells in order to improve the heat exchange effect of the battery device. However, this structural design tends to increase the overall volume of the battery device, which in turn increases the space required to arrange the battery device and affects the assembly of the battery device. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a battery device that has good heat exchange performance and facilitates the miniaturization design of the battery device.

[0005] The first objective of this application is to propose a battery device.

[0006] The second objective of this application is to propose an energy storage device.

[0007] The third objective of this application is to provide an electrical device.

[0008] In a first aspect, this application proposes a battery device, comprising: a battery cell and a support frame, wherein the support frame has a receiving cavity for placing the battery cell, and the support frame has a heat exchange channel for receiving a heat exchange medium, the heat exchange channel being located outside the receiving cavity so that the heat exchange medium exchanges heat with the battery cell.

[0009] In the above technical solution, by setting heat exchange channels within the support frame, heat exchange between individual battery cells is facilitated, thereby improving the heat exchange effect of the battery device and consequently enhancing its charge-discharge performance and safety. Furthermore, the integration of the support frame is improved, eliminating the need for separate components for heat exchange between battery cells. This simplifies the battery device structure and facilitates miniaturization. Additionally, the functionality of the support frame is enhanced, enabling it to not only support the battery cells but also facilitate heat exchange.

[0010] According to some embodiments of this application, the battery cell further includes a first region and a second region with different temperatures; the battery device further includes a temperature equalization element for containing a phase change working fluid, the phase change working fluid being able to transform between gas and liquid phases under the influence of heat from the battery cell, the temperature equalization element being thermally connected to the battery cell; wherein, the temperature equalization element includes a liquid wick, a portion of the liquid wick being disposed corresponding to the first region, and another portion of the liquid wick being disposed corresponding to the second region, so that the temperature equalization element can adjust the temperature difference between the first region and the second region.

[0011] In the above technical solution, by setting a temperature equalization element, the temperature uniformity of the battery cells is improved, the risk of thermal runaway in the battery cells is reduced, and the charging and discharging performance and safety of the battery device are further improved. By setting a liquid absorbent core, with one part of the liquid absorbent core corresponding to the first region and the other part corresponding to the second region, the temperature equalization element can adjust the temperature difference between the first region and the second region, thereby further improving the temperature uniformity of the battery cells. At the same time, the liquid absorbent core can guide the liquid phase change working fluid, which helps to improve the orderliness and flow efficiency of the liquid phase change working fluid flow, thereby improving the temperature equalization effect of the phase change working fluid on the battery cells.

[0012] According to some embodiments of this application, the heat exchanger exchanges heat with the first sidewall of the battery cell, and the heat exchange channel exchanges heat with the second sidewall of the battery cell. The first sidewall and the second sidewall are adjacent to and intersecting each other.

[0013] In the above technical solution, by exchanging heat between the heat exchanger and the first sidewall of the battery cell, and between the heat exchange channel and the second sidewall of the battery cell, the heat exchange efficiency of the battery cell can be improved, and the temperature uniformity of the battery cell can also be improved, thereby further improving the charging and discharging performance and safety of the battery cell.

[0014] According to some embodiments of this application, the support frame is provided with a temperature equalization cavity spaced apart from the heat exchange channel, and the temperature equalization cavity is used to house the phase change working fluid and the liquid suction core to form the temperature equalization element.

[0015] In the above technical solution, by setting a temperature-equalizing cavity within the support frame that can be used to fill the phase change working fluid and the liquid wick, the support frame can form a temperature-equalizing component. This is beneficial to further improve the integration and functionality of the support frame. There is no need to set additional components to improve the temperature uniformity of the battery cells, which simplifies the component setup of the battery device and facilitates the miniaturization design of the battery device. In addition, by setting the heat exchange channel and the temperature-equalizing cavity separately, the risk of mixing between the heat exchange medium and the phase change working fluid can be reduced, and the different pressure environments in the heat exchange channel and the temperature-equalizing cavity can be isolated, which is beneficial to improving safety.

[0016] According to some embodiments of this application, the support frame includes a base plate and a surrounding plate connected to the base plate. The base plate is used to support the battery cell. The surrounding plate is arranged around the base plate in the circumferential direction. The base plate and the surrounding plate define the receiving cavity. The heat exchange channel is located inside the surrounding plate. The temperature equalization cavity is provided inside the base plate.

[0017] In the above technical solution, by setting the heat exchange channel inside the enclosure and the temperature equalization cavity inside the bottom plate, the heat exchange channel and the temperature equalization cavity are spaced apart. This allows the heat exchange function of the heat exchange medium and the temperature equalization function of the phase change working fluid to act on different sidewalls of the battery cell, thereby improving the heat exchange effect of the battery cell and improving the temperature equalization of the battery cell.

[0018] According to some embodiments of this application, the base plate is supported on the first sidewall of the battery cell, and the first sidewall is the sidewall with the largest area of ​​the battery cell; the liquid absorption core is attached to one side wall of the temperature equalization chamber in a first direction and is spaced apart from the surrounding plate.

[0019] In the above technical solution, by supporting the base plate on the first side wall of the battery cell, the reliability of the base plate supporting the battery cell is improved; by making the liquid absorber core fit against at least one side wall of the temperature equalization chamber in the first direction, the assembly stability of the liquid absorber core is improved, and the liquid phase change working fluid guided by the liquid absorber core is facilitated to exchange heat with the battery cell, thereby improving the heat exchange effect; by setting the liquid absorber core and the surrounding plate at intervals, sufficient vaporization space is reserved for the phase change working fluid in the temperature equalization chamber, thereby improving the stability of the vaporization of the phase change working fluid.

[0020] According to some embodiments of this application, the enclosure includes first side plates disposed opposite to each other, the same end of the two first side plates being connected by a second side plate, and the heat exchange channel being provided in each first side plate and at least one second side plate.

[0021] In the above technical solution, by providing heat exchange channels in both the first side plate and at least one second side plate, it is beneficial to increase the heat exchange area between the heat exchange channels and the battery cells, thereby improving the heat exchange efficiency of the battery cells. Furthermore, it facilitates the connection of heat exchange channels in different side plates, which helps to extend the flow path of the heat exchange medium and allows the heat exchange medium to perform sufficient heat exchange.

[0022] According to some embodiments of this application, one of the first side plates is provided with a liquid inlet and the other of the first side plates is provided with a liquid outlet.

[0023] In the above technical solution, by setting an inlet in one of the first side plates and an outlet in the other first side plate, it is beneficial to extend the flow path of the heat exchange medium, so that the heat exchange medium can fully exchange heat with the battery cells and improve the energy utilization rate of the heat exchange medium.

[0024] According to some embodiments of this application, the receiving cavity has an opening on one side in a first direction for placing the battery cell, and in the first direction, the heat exchange channel extends toward the side of the heat exchanger and is positioned directly opposite the heat exchanger.

[0025] In the above technical solution, by setting the heat exchange channel and the temperature equalization element directly opposite each other, the heat exchange medium in the heat exchange channel and the phase change working fluid in the temperature equalization element can exchange heat, which is beneficial to improving the heat exchange effect between the heat exchange medium and the phase change working fluid.

[0026] According to some embodiments of this application, the heat exchange channel includes a plurality of spaced microchannels.

[0027] In the above technical solution, by including multiple spaced microchannels in the heat exchange channel, it is beneficial to increase the contact area of ​​the heat exchange medium, thereby improving the heat exchange efficiency of the heat exchange medium, and also beneficial to reduce the space occupied by the heat exchange flow, thereby reducing the volume of the support frame, which in turn is beneficial to realize the miniaturization design of the battery device. At the same time, it is also beneficial to reduce the amount of heat exchange medium used and reduce the heat exchange cost of the battery cell.

[0028] According to some embodiments of this application, the battery cell is a pouch cell.

[0029] In the above technical solution, by configuring the battery cell as a soft-pack battery cell, it is beneficial to improve the fit between the battery cell casing and the inner wall of the cavity, increase the contact area between the battery cell and the support frame, and reduce the thermal resistance when the battery cell contacts the support frame, thereby improving the heat exchange efficiency of the battery cell.

[0030] According to some embodiments of this application, there are multiple support frames, each of which contains the battery cell, and the heat exchange channels of the multiple support frames are connected.

[0031] In the above technical solution, by setting up multiple support frames and connecting the heat exchange channels of the multiple support frames, it is beneficial to simplify the structure of the battery device, reduce the material cost of the battery device, and facilitate the miniaturization design of the battery device.

[0032] According to some embodiments of this application, a plurality of support frames are stacked, the liquid inlets of the heat exchange channels of the plurality of support frames are arranged opposite each other to communicate, and the liquid outlets of the heat exchange channels of the plurality of support frames are arranged opposite each other to communicate.

[0033] In the above technical solution, by stacking multiple support frames, the space utilization rate of the battery device in the direction parallel to the stacking of multiple support frames is improved, thereby reducing the size of the battery device in other directions. Furthermore, by arranging the liquid inlets of the heat exchange channels of multiple support frames facing each other and the liquid outlets of the heat exchange channels of multiple support frames facing each other, the heat exchange channels of multiple support frames can be interconnected, which is conducive to improving the structural compactness of the battery device and facilitating the miniaturization design of the battery device.

[0034] According to some embodiments of this application, the receiving cavity has an opening for placing the battery cell on one side in a first direction, and the side of the battery cell facing the opening is provided with a heat insulation member.

[0035] In the above technical solution, by placing the heat insulation component on the side of the battery cell facing the opening, when one of the multiple battery cells experiences thermal runaway, the heat insulation component can reduce the risk that the battery cell will heat up the adjacent battery cells, thereby reducing the risk that the remaining battery cells will also be caused by thermal runaway and improving the safety of the battery device.

[0036] According to some embodiments of this application, at least a portion of the thermal insulation element is made of an elastic material.

[0037] In the above technical solution, by setting at least a portion of the heat insulation component as an elastic material, the heat insulation component can not only reduce the risk of thermal runaway propagation of battery cells, but also play a role in buffering and shock absorption to absorb vibration energy, provide buffer protection for battery cells, reduce the risk of damage to battery cells, and thus help improve the service life of the battery device.

[0038] According to some embodiments of this application, the battery device further includes a housing, with a plurality of the support frames disposed within the housing. The housing is provided with an inlet pipe and an outlet pipe. The inlet pipe is connected to a heat exchange channel of one of the support frames, and the outlet pipe is connected to a heat exchange channel of one of the support frames.

[0039] In the above technical solution, by setting an inlet pipe and an outlet pipe on the housing, and connecting the inlet pipe to the heat exchange channel of one of the support frames, and connecting the outlet pipe to the heat exchange channel of one of the support frames, it is beneficial to improve the convenience of communication between the heat exchange channels of multiple support frames and the inlet and outlet pipes. Furthermore, it eliminates the need to set multiple inlet pipes and multiple outlet pipes that are connected to the heat exchange channels of multiple support frames one-to-one, which helps to simplify the structure of the battery device, reduce the material cost of the battery device, and facilitate the miniaturization design of the battery device.

[0040] Secondly, this application proposes an energy storage device comprising a plurality of the aforementioned battery devices, the battery devices being used to store or provide electrical energy.

[0041] In the above technical solution, since the energy storage device adopts the aforementioned battery device, a heat exchange channel is provided in the support frame of the battery device to facilitate heat exchange between individual battery cells, thereby improving the heat exchange effect of the individual battery cells. This, in turn, helps to improve the heat exchange effect of the battery device, and further improves the charging and discharging performance and safety of the battery device. Furthermore, it can increase the integration of the support frame, eliminating the need for separate components for heat exchange between individual battery cells, which simplifies the structure of the battery device and facilitates the miniaturization design of the battery device, thus enabling the miniaturization design of the energy storage device.

[0042] Thirdly, this application proposes an electrical device, including the aforementioned battery device or the aforementioned energy storage device, wherein the battery device is used to store or provide electrical energy.

[0043] In the above technical solution, since the power device uses the aforementioned battery device, a heat exchange channel is provided within the support frame of the battery device to facilitate heat exchange between individual battery cells, thereby improving the heat exchange effect of the individual battery cells and thus improving the heat exchange effect of the battery device. This, in turn, helps to improve the charging and discharging performance and safety of the battery device. Furthermore, it can increase the integration of the support frame, eliminating the need for a separate component for heat exchange between individual battery cells, which simplifies the structure of the battery device and facilitates miniaturization of the battery device, reducing the space required for its arrangement and saving space for other components in the power device.

[0044] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0045] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0046] Figure 1 The electrical device provided in some embodiments of this application is a structural schematic diagram of a vehicle;

[0047] Figure 2 Simplified structural diagrams of energy storage devices provided in some embodiments of this application;

[0048] Figure 3 Exploded views of battery devices provided in some embodiments of this application;

[0049] Figure 4 A top view of the support frame provided in some embodiments of this application;

[0050] Figure 5 Side view of the support frame provided for some embodiments of this application;

[0051] Figure 6 for Figure 5 Sectional view at AA;

[0052] Figure 7 for Figure 6 Enlarged view at point A1;

[0053] Figure 8 for Figure 5 Sectional view at BB;

[0054] Figure 9 for Figure 8 Enlarged view of section B1.

[0055] Figure label:

[0056] Battery device 100

[0057] Battery cell 110, second sidewall 111, first sidewall 112, first region 113, second region 114

[0058] Support frame 120, receiving cavity 121,

[0059] Heat exchange channel 122, microchannel 1221

[0060] Temperature equalization chamber 123, base plate 124

[0061] Enclosure panel 125, first side panel 1251, second side panel 1252

[0062] Liquid inlet 126, liquid outlet 127,

[0063] Temperature equalization element 130, liquid suction core 140, heat insulation element 150,

[0064] Box 160, First Interface 161, Second Interface 162

[0065] First sub-box 163, First part 1631, Second part 1632

[0066] Second sub-box 164, third part 1641, fourth part 1642

[0067] Energy storage device 200, power consumption device 300. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0069] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0070] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0071] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0072] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0073] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0074] In this application, "multiple" means two or more (including two).

[0075] In this application, the battery cell 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 embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0076] A battery cell typically consists of a casing, a cell, and an electrolyte. The casing is used to house the cell and electrolyte. Based on the material properties of the casing, battery cells can generally be divided into hard-shell battery cells and soft-pack battery cells. Hard-shell battery cells typically have casings made of steel or aluminum, while soft-pack battery cells typically have casings made of aluminum-plastic film.

[0077] A battery cell includes one or more electrode assemblies, which are formed by stacking or winding positive electrode plates, negative electrode plates and separators.

[0078] The positive electrode typically includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as a positive electrode tab. Multiple positive electrode tabs are stacked together and electrically connected to the positive electrode post. For example, the multiple stacked positive electrode tabs can be directly soldered to the positive electrode post to form an electrical connection; alternatively, the cell may also include a positive electrode adapter piece. The multiple stacked positive electrode tabs are soldered to one end of the positive electrode adapter piece, and the other end of the positive electrode adapter piece is soldered to the positive electrode post, so that the positive electrode tabs and the positive electrode post form an electrical connection.

[0079] The negative electrode typically includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector. The negative current collector without the negative active material layer protrudes beyond the coated negative current collector, serving as a negative electrode tab. Multiple negative electrode tabs are stacked together and electrically connected to the negative electrode post. For example, the stacked negative electrode tabs can be directly welded to the negative electrode post to form an electrical connection; alternatively, the cell may also include a negative electrode adapter piece, with the stacked negative electrode tabs welded to one end of the adapter piece, and the other end of the adapter piece welded to the negative electrode post, thus forming an electrical connection between the negative electrode tabs and the negative electrode post. The material of the separator is not limited; for example, it can be polypropylene or polyethylene. The electrolyte can be liquid, solid, or semi-solid.

[0080] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide voltage and capacity. For example, the battery device mentioned in this application can be a battery module or a battery pack. A battery module generally includes multiple battery cells. The battery device includes a housing for encapsulating multiple battery cells or multiple battery modules, and the housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0081] In recent years, new energy vehicles have experienced rapid development. In this field, battery devices, as the power source, play an irreplaceable and crucial role. Among these, battery devices, as core components of new energy vehicles, have high requirements in both performance and size.

[0082] In related technologies, a separate heat exchange component is usually set up in the battery device to exchange heat with the individual battery cells in order to improve the heat exchange effect of the battery device. However, this structural design tends to increase the overall volume of the battery device, which in turn increases the space required to arrange the battery device and affects the assembly of the battery device.

[0083] Based on the above considerations, in order to improve the heat exchange effect of the battery device while realizing the miniaturization design of the battery device, a battery device is proposed. The battery device includes: a battery cell and a support frame. The support frame is provided with a cavity for placing the battery cell and a heat exchange channel for accommodating the heat exchange medium. The heat exchange channel is located outside the cavity so that the heat exchange medium can exchange heat with the battery cell.

[0084] In the above technical solution, by setting heat exchange channels within the support frame, heat exchange between individual battery cells is facilitated, thereby improving the heat exchange effect of the battery device and consequently enhancing its charge-discharge performance and safety. Furthermore, the integration of the support frame is improved, eliminating the need for separate components for heat exchange between battery cells. This simplifies the battery device structure and facilitates miniaturization. Additionally, the functionality of the support frame is enhanced, enabling it to not only support the battery cells but also facilitate heat exchange.

[0085] This application provides an energy storage device using the battery device disclosed herein. The energy storage device may include, but is not limited to, energy storage containers, energy storage cabinets, etc.

[0086] This application provides an electrical device that uses the battery device or energy storage device disclosed herein. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0087] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the electrical device 300, energy storage device 200, and battery device 100 of this application.

[0088] Please refer to Figure 1 , Figure 1 The electrical device 300 provided in some embodiments of this application is a schematic diagram of a vehicle structure. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle is equipped with a battery device 100 or an energy storage device 200. The battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to supply power to the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller can be used to control the battery device 100 to supply power to the motor, for example, for the vehicle's starting, navigation, and driving power needs. In some embodiments of this application, the battery device 100 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle.

[0089] Please refer to Figure 2 , Figure 2 This is a simplified structural diagram of an energy storage device 200 provided in some embodiments of this application. The energy storage device 200 includes multiple battery devices 100, which are used to store or provide electrical energy. The multiple battery devices 100 can be connected in series via a busbar to increase the voltage of the energy storage device 200. The energy storage device 200 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 200 can store electrical energy as needed and output electrical energy when appropriate. For example, the energy storage device 200 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0090] In some embodiments, the energy storage device 200 may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0091] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 100 via piping for regulating the temperature of the individual battery cells 110.

[0092] As an example, the main control module can serve as the management unit of the battery device 100, used to monitor and manage the battery device 100. The main control module can monitor information such as the current, voltage, power, or temperature of the battery device 100. For example, it can control the charging and discharging current and voltage of the battery device 100. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0093] As an example, the central control module can serve as the battery management unit of the energy storage device 200, used to monitor and manage the energy storage device 200. The central control module can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device 200. For example, it can control the charging and discharging current and voltage of the energy storage device 200. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0094] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device 200.

[0095] Please combine Figures 3 to 7 , Figure 3 This is an exploded view of a battery device 100 provided in some embodiments of this application. Figure 4 This is a top view of the support frame 120 provided in some embodiments of this application. Figure 5 A side view of the support frame 120 provided in some embodiments of this application. Figure 6 for Figure 5 Sectional view at AA Figure 7 for Figure 6 Enlarged view at A1. According to an embodiment of this application, the battery device 100 includes: a battery cell 110 and a support frame 120. The support frame 120 has a receiving cavity 121 for placing the battery cell 110, and a heat exchange channel 122 for receiving a heat exchange medium is provided in the support frame 120. The heat exchange channel 122 is located outside the receiving cavity 121 so that the heat exchange medium can exchange heat with the battery cell 110.

[0096] In the above technical solution, by setting a heat exchange channel 122 in the support frame 120, heat exchange can be carried out on the battery cell 110, thereby improving the heat exchange effect of the battery cell 110, which in turn improves the heat exchange effect of the battery device 100, and further improves the charging and discharging performance and safety of the battery device 100. It can also improve the integration of the support frame 120, eliminating the need for a separate component for heat exchange on the battery cell 110, which simplifies the structure of the battery device 100 and facilitates the miniaturization design of the battery device 100. At the same time, it can also improve the functionality of the support frame 120, so that the support frame 120 can not only support the battery cell 110, but also perform the function of heat exchange on the battery cell 110.

[0097] For example, the support frame 120 can serve as an installation carrier for the battery cell 110 to support the battery cell 110, which helps to improve the assembly stability of the battery cell 110. When the battery cell 110 is placed in the receiving cavity 121, the support frame 120 can shield at least part of the battery cell 110 to protect the battery cell 110, which helps to reduce the risk of damage to the battery cell 110 caused by external forces acting directly on it.

[0098] Furthermore, a heat exchange channel 122 is provided inside the support frame 120, located outside the receiving cavity 121. When the battery cell 110 is placed inside the receiving cavity 121, the heat exchange channel 122 can be arranged opposite to at least a portion of the battery cell 110. The heat exchange medium can circulate in the heat exchange channel 122 and exchange heat with the battery cell 110 to adjust the temperature of the battery cell 110 so that the temperature of the battery cell 110 can meet the usage requirements, thereby improving the charging and discharging performance and usage safety of the battery device 100.

[0099] Therefore, by providing a heat exchange channel 122 within the support frame 120, the support frame 120 can not only support the battery cell 110 but also exchange heat for the battery cell 110. This improves the integration and structural compactness of the support frame 120, and eliminates the need for additional components within the battery device 100 for heat exchange of the battery cell 110. This simplifies the component arrangement of the battery device 100, reduces its production cost, and facilitates miniaturization of the battery device 100, thereby saving installation space and improving assembly convenience.

[0100] Combination Figure 3 , Figure 8 and Figure 9 , Figure 8 for Figure 5 Sectional view at BB Figure 9 for Figure 8 Enlarged view at B1. In some embodiments of this application, the battery cell 110 further includes a first region 113 and a second region 114 with different temperatures, and the battery device 100 further includes a temperature equalization element 130, which is used to contain a phase change working fluid. The phase change working fluid can transform between gas and liquid phases under the influence of heat from the battery cell 110. The temperature equalization element 130 is thermally connected to the battery cell 110. The temperature equalization element 130 includes a liquid absorbent core 140, a part of which is correspondingly disposed with respect to the first region 113, and another part of which is correspondingly disposed with respect to the second region 114, so that the temperature equalization element 130 can adjust the temperature difference between the first region 113 and the second region 114.

[0101] In the above technical solution, by setting the temperature equalization element 130, the temperature uniformity of the battery cell 110 is improved, the risk of thermal runaway of the battery cell 110 is reduced, and the charging and discharging performance and safety of the battery device 100 are further improved. By setting the liquid absorbent core 140, with one part of the liquid absorbent core 140 corresponding to the first region 113 and the other part corresponding to the second region 114, the temperature equalization element 130 can adjust the temperature difference between the first region 113 and the second region 114, thereby further improving the temperature uniformity of the battery cell 110. At the same time, the liquid absorbent core 140 can guide the liquid phase change working fluid, which helps to improve the orderliness and flow efficiency of the liquid phase change working fluid flow, thereby improving the temperature equalization effect of the phase change working fluid on the battery cell 110.

[0102] For example, when there is a temperature difference between the first region 113 and the second region 114, a portion of the phase change working fluid can absorb heat from the high-temperature position of the battery cell 110 and evaporate to become gaseous. Correspondingly, another portion of the phase change working fluid at the low-temperature position of the battery cell 110 can condense to become liquid. During the condensation of the phase change working fluid, a pressure difference is generated. Under the action of the pressure difference, the gaseous phase change working fluid can move to the low-temperature position of the battery cell 110, thereby transferring heat from the high-temperature position of the battery cell 110 to the low-temperature position, improving the temperature uniformity of the battery cell 110, which is beneficial to improving the charging and discharging performance and safety of the battery cell 110, and thus beneficial to improving the charging and discharging performance and safety of the battery device 100.

[0103] Furthermore, taking the heat exchange medium for heat dissipation of the battery cell 110 as an example, since the heat exchange channel 122 is located outside the receiving cavity 121, and the battery cell 110 is disposed inside the receiving cavity 121, the heat exchange efficiency of the part of the battery cell 110 near the heat exchange medium is higher than that of the part far away from the heat exchange medium. That is to say, the heat dissipation efficiency of the part of the outer side of the battery cell 110 near the heat exchange medium is higher than that of the part far away from the heat exchange medium. The part of the battery cell 110 far away from the heat exchange medium is defined as the first region 113, and the part of the battery cell 110 near the heat exchange medium is defined as the second region 114. The phase change working medium corresponding to the first region 113 can absorb the heat of the first region 113 and evaporate to convert into a gaseous state, while the phase change working medium corresponding to the second region 114 is liquid. Under the action of the pressure difference, the gaseous phase change working medium can flow towards the position near the second region 114. It can also be understood that the gaseous phase change working medium can flow towards the edge of the support frame 120.

[0104] Meanwhile, the wick 140 is a porous medium material and is respectively arranged in the first region 113 and the second region 114. When the liquid phase change working fluid comes into contact with the wick 140, under the action of the wetting effect, the liquid phase change working fluid can spontaneously penetrate into and fill the pores of the wick 140. The liquid phase change working fluid filled into the wick 140 can be transported to the first region 113 along the interior of the wick 140, improving the orderliness and flow efficiency of the phase change working fluid flow, thereby improving the heat exchange efficiency of the first region 113 and reducing the temperature difference between the first region 113 and the second region 114.

[0105] Therefore, the phase change working medium fully exchanges heat with the battery cell 110, improving the temperature uniformity of the battery cell 110, which in turn helps to improve the charging and discharging performance and safety of the battery device 100.

[0106] It should be noted that the boundary between the first region 113 and the second region 114 of the battery cell 110 can vary depending on the dividing criteria. For example, in the operating state of the battery cell 110, the temperature of different regions varies under the influence of the heat exchange medium. A dividing criterion can be set manually, classifying the region of the battery cell 110 with a temperature below that criterion as the second region 114, and the region with a temperature equal to or greater than that criterion as the first region 113. Based on the preceding analysis, the liquid wick 140 can be shaped such that it extends at least partially away from the heat exchange channel 122.

[0107] In some examples, the absorbent core 140 includes, but is not limited to, a metal braided structure, a metal sintered and etched structure, or a porous ceramic structure. The specific structural form of the absorbent core 140 can be determined according to actual production requirements, and no specific limitation is made here.

[0108] In some embodiments, the phase change working fluid satisfies at least one of the following conditions:

[0109] The supercritical temperature range of phase change working fluids is 200℃~270℃;

[0110] The triple point temperature of the phase change working fluid ranges from -110℃ to 80℃.

[0111] The supercritical pressure of the phase change working fluid ranges from 4 MPa to 5.5 MPa.

[0112] The surface tension of the phase change working fluid ranges from 0.015 N / m to 0.035 N / m;

[0113] The liquid density of the phase change working fluid ranges from 700 kg / m³ to 900 kg / m³.

[0114] The latent heat enthalpy difference of the phase change working fluid ranges from 280 kJ / kg to 350 kJ / kg.

[0115] The viscosity of the phase change working fluid ranges from 2*10. -4 Pa·s ~4*10 -4 Pa·s.

[0116] When the battery cell 110 experiences thermal runaway, the temperature is typically above 150°C. By setting the supercritical temperature of the phase change working medium (i.e., the failure temperature of the phase change working medium) to 200°C~270°C, it is beneficial to ensure that the temperature equalization element 130 can always work normally before the battery cell 110 reaches the most dangerous state, thus ensuring the working performance of the temperature equalization element 130. This facilitates the use of the temperature equalization element 130 to suppress the temperature rise of the battery cell 110, thereby improving the working performance of the battery device 100.

[0117] In addition, the normal operating temperature of the battery device 100 is usually between -20°C and 60°C. Setting the supercritical temperature of the phase change working medium at a high level (200°C+) ensures that the phase change working medium can be in the ideal subcritical region within the normal operating range of the battery device 100, thereby maximizing the phase change heat transfer efficiency of the phase change working medium and improving the performance of the temperature equalizer 130.

[0118] By setting the triple point temperature range of the phase change working fluid to -110℃ to 80℃, it means that the phase change working fluid can remain liquid in any environment above this temperature (-110℃), ensuring that even if the battery device 100 is placed in an extreme low temperature environment, the temperature equalization element 130 will not be damaged by the freezing of the phase change working fluid, thus creating an extremely wide and reliable operating window for the battery device 100.

[0119] By setting the supercritical pressure range of the phase change working fluid to 4MPa~5.5MPa, the risk of the temperature homogenizer 130 bursting is greatly reduced. At the same time, the supercritical pressure and supercritical temperature are interrelated. This pressure range usually corresponds to a very ideal temperature window, ensuring that the temperature homogenizer 130 can continue to work efficiently before thermal runaway occurs. Within this pressure range, the phase change working fluid has good physical property differences (such as density difference and surface tension) between its liquid and gaseous states, which is conducive to generating strong capillary driving force and efficient phase change heat transfer, thereby improving the temperature homogenization performance of the temperature homogenizer 130.

[0120] By setting the surface tension of the phase change working fluid to a range of 0.015 N / m to 0.035 N / m, within this surface tension range, the phase change working fluid can generate sufficiently strong capillary force in the pores of the wick 140, thereby significantly improving the maximum heat transfer capacity of the temperature equalizer 130 and facilitating stable and sufficient reflux of the phase change working fluid, thus ensuring the reliability of the performance of the temperature equalizer 130.

[0121] It should be noted that the flow resistance of the liquid phase change working fluid in the pores of the wick 140 is related to the density and viscosity of the phase change working fluid. This is mitigated by setting the liquid density range of the phase change working fluid to 700 kg / m³~900 kg / m³ and the viscosity range to 2*10. -4 Pa·s ~4*10 -4 Pa·s allows for smooth flow of the phase change working fluid, thus enabling a higher volumetric flow rate under the same capillary driving force. This allows for the delivery of more phase change working fluid to meet evaporation requirements and improves the temperature uniformity of the temperature uniformity of the temperature uniformity element 130 to the battery cell 110.

[0122] By setting the latent heat enthalpy difference of the phase change working medium to a range of 280KJ / KG~350KJ / KG, phase change working media with this latent heat range (such as acetone and methanol) usually also have a low boiling point and a small liquid density. This means that the overall heat capacity of the temperature equalizer 130 is small. When the battery device 100 is preheated at low temperature, the temperature equalizer 130 can start up and start working more quickly, shortening the time for the battery cell 110 to reach the ideal operating temperature.

[0123] In summary, by setting the above conditions, this application can guarantee the performance of the phase change working fluid, thereby improving the temperature uniformity of the phase change working fluid on the battery cell 110.

[0124] Please combine Figure 3 , Figure 8 and Figure 9 In some embodiments of this application, the heat exchanger 130 exchanges heat with the first sidewall 112 of the battery cell 110, and the heat exchange channel 122 exchanges heat with the second sidewall 111 of the battery cell 110. The first sidewall 112 and the second sidewall 111 are adjacent and intersecting.

[0125] In the above technical solution, by exchanging heat between the heat exchanger 130 and the first sidewall 112 of the battery cell 110, and the heat exchange channel 122 and the second sidewall 111 of the battery cell 110, the heat exchange efficiency of the battery cell 110 can be improved, and the temperature uniformity of the battery cell 110 can also be improved, thereby further improving the charging and discharging performance and safety of the battery cell 110.

[0126] For example, the heat exchange channel 122 exchanges heat with the second sidewall 111 of the battery cell 110. The portion of the first sidewall 112 near the second sidewall 111 can also indirectly exchange heat through the heat exchange channel 122. However, the portion of the first sidewall 112 away from the second sidewall 111 is difficult to heat exchange through the heat exchange channel 122. In other words, the heat exchange efficiency of the portion of the first sidewall 112 near the second sidewall 111 is higher than that of the portion away from the second sidewall 111, leading to uneven temperature distribution on the first sidewall 112. Based on this, the heat exchanger 130 can exchange heat with the first sidewall 112. This can improve the heat exchange efficiency of the battery cell 110 through the heat exchange channel 122, and the phase change working fluid in the heat exchanger 130 can adaptively exchange heat at different positions of the first sidewall 112. This is beneficial to improving the temperature uniformity of the battery cell 110 and reducing the impact of the arrangement of the heat exchange channel 122 on the temperature uniformity of the battery cell 110. This is beneficial to improving the charging and discharging performance and safety of the battery cell 110.

[0127] Please refer to Figure 3In some embodiments of this application, the area of ​​the first sidewall 112 is larger than the area of ​​the second sidewall 111, the heat exchanger 130 exchanges heat with the first sidewall 112, and the heat exchange channel 122 exchanges heat with the second sidewall 111.

[0128] In the above technical solution, by exchanging heat between the heat exchanger 130 and the first sidewall 112 of the battery cell 110, and the heat exchange channel 122 and the second sidewall 111 of the battery cell 110, the heat exchange efficiency of the battery cell 110 can be improved, and the temperature uniformity of the battery cell 110 can also be improved, thereby further improving the charging and discharging performance and safety of the battery cell 110.

[0129] For example, the battery cell 110 may include a first sidewall 112 extending in the horizontal direction and a second sidewall 111 extending in the vertical direction, and the area of ​​the first sidewall 112 is larger than the area of ​​the second sidewall 111. The position of the first sidewall 112 near the second sidewall 111 can be indirectly heated by the heat exchange channel 122, while the position of the first sidewall 112 far from the second sidewall 111 is more difficult to be heated by the heat exchange channel 122. That is to say, when the area of ​​the first sidewall 112 is larger than the area of ​​the second sidewall 111, if the battery cell 110 is heated by the heat exchange channel 122 alone, it is easy to cause the temperature difference between different positions of the first sidewall 112 to intensify. Based on this, the temperature equalization element 130 can be heated with the first sidewall 112. Even if the area of ​​the first sidewall 112 is larger than the area of ​​the second sidewall 111, the temperature uniformity between different positions of the battery cell 110 can be effectively improved under the action of the phase change working fluid, which is conducive to further reducing the risk of temperature difference affecting the performance of the battery cell 110.

[0130] Please combine Figure 8 and Figure 9 In some embodiments of this application, the support frame 120 is provided with a temperature equalization cavity 123 spaced apart from the heat exchange channel 122. The temperature equalization cavity 123 is used to set the phase change working fluid and the liquid suction core 140 to form a temperature equalization element 130.

[0131] In the above technical solution, by setting a temperature equalization cavity 123 within the support frame 120 for filling the phase change working fluid and the liquid wick 140, the support frame 120 can form a temperature equalization element 130. This is beneficial to further improve the integration of the support frame 120 and its functionality. There is no need to set additional components to improve the temperature equalization of the battery cell 110, which simplifies the component arrangement of the battery device 100 and facilitates the miniaturization design of the battery device 100. In addition, by setting the heat exchange channel 122 and the temperature equalization cavity 123 separately, the risk of mixing between the heat exchange medium and the phase change working fluid is reduced, and the different pressure environments within the heat exchange channel 122 and the temperature equalization cavity 123 can be isolated, which is beneficial to improving safety.

[0132] For example, a heat exchange channel 122 may be provided at a position on the support frame 120 opposite to the second sidewall 111 of the battery cell 110, and a temperature equalization cavity 123 may be provided at a position on the support frame 120 opposite to the first sidewall 112 of the battery cell 110, so as to achieve the separation of the heat exchange channel 122 and the temperature equalization cavity 123, and the heat exchange channel 122 and the temperature equalization cavity 123 are independent of each other. In other words, the heat exchange channel 122 and the temperature equalization cavity 123 are not interconnected, so as to reduce the risk of the heat exchange medium in the heat exchange channel 122 and the phase change working fluid in the temperature equalization cavity 123 mixing with each other, and can isolate the different pressure environments in the heat exchange channel 122 and the temperature equalization cavity 123, thereby improving safety.

[0133] Furthermore, by setting the heat exchange channel 122 and the temperature equalization chamber 123 at intervals, the heat exchange medium can work independently of the phase change working medium. For example, when the temperature of the battery cell 110 is within the temperature range that meets its own working requirements, the phase change working medium continues to work to ensure the temperature uniformity of the battery cell 110. Considering that the battery cell 110 does not need to exchange heat at this time, the supply of heat exchange medium to the heat exchange channel 122 can be stopped to reduce the loss of heat exchange medium and facilitate flexible heat exchange of the battery cell 110.

[0134] Please combine Figures 6 to 9 In some embodiments of this application, the support frame 120 includes a base plate 124 and a surrounding plate 125 connected to the base plate 124. The base plate 124 is used to support the battery cell 110. The surrounding plate 125 is arranged around the base plate 124 in the circumferential direction. The base plate 124 and the surrounding plate 125 define a receiving cavity 121. The heat exchange channel 122 is located in the surrounding plate 125. The base plate 124 is provided with a temperature equalization cavity 123.

[0135] In the above technical solution, by setting the heat exchange channel 122 inside the enclosure 125 and the temperature equalization cavity 123 inside the bottom plate 124, the heat exchange channel 122 and the temperature equalization cavity 123 are spaced apart. This allows the heat exchange function of the heat exchange medium and the temperature equalization function of the phase change working fluid to act on different sidewalls of the battery cell 110, thereby improving the heat exchange effect of the battery cell 110 and improving the temperature uniformity of the battery cell 110.

[0136] For example, the enclosure 125 may be disposed around the base plate 124 in the circumferential direction, and the enclosure 125 may protrude from the base plate 124 in the vertical direction (which can also be understood as the thickness direction of the base plate 124 or the first direction described below), so that the enclosure 125 and the base plate 124 can jointly define a receiving cavity 121 that is open on one side, through which the battery cell 110 can be disposed in the receiving cavity 121 through the open end, and the base plate 124 can support the battery cell 110 to improve the assembly stability of the battery cell 110.

[0137] The enclosure 125 can be disposed opposite to the second sidewall 111 of the battery cell 110. A heat exchange channel 122 is provided inside the enclosure 125. The heat exchange medium flowing in the heat exchange channel 122 can exchange heat with the second sidewall 111 of the battery cell 110. The bottom plate 124 can be disposed opposite to the first sidewall 112 of the battery cell 110. A temperature equalization cavity 123 for filling the phase change working fluid is provided inside the enclosure 125. The phase change working fluid can adaptively exchange heat with different positions of the first sidewall 112 to improve the temperature uniformity of the battery cell 110 and reduce the risk of excessive temperature difference in the battery cell 110 due to different distances between different positions of the first sidewall 112 and the heat exchange channel 122.

[0138] Combination Figure 1 , Figure 2 , Figure 8 and Figure 9 In some embodiments of this application, the base plate 124 is supported on the first side wall 112 of the battery cell 110, and the first side wall 112 is the side wall with the largest area of ​​the battery cell 110; the liquid absorption core 140 is attached to at least one side wall of the temperature equalization chamber 123 in the first direction and is spaced apart from the surrounding plate 125.

[0139] It should be noted that "first direction" can be understood as the height or vertical direction of the battery device 100, or the opening direction of the receiving cavity 121. For a specific direction illustration, please refer to [reference needed]. Figure 3 , Figure 5 or Figure 8 As shown.

[0140] In the above technical solution, by supporting the base plate 124 on the first side wall 112 of the battery cell 110, the reliability of the base plate 124 supporting the battery cell 110 is improved; by making the liquid absorber 140 fit against at least one side wall of the temperature equalization chamber 123 in the first direction, the assembly stability of the liquid absorber 140 is improved, and the liquid phase change working fluid guided by the liquid absorber 140 is facilitated to exchange heat with the battery cell 110, thereby improving the heat exchange effect; by setting the liquid absorber 140 and the surrounding plate 125 at intervals, sufficient vaporization space is reserved for the phase change working fluid in the temperature equalization chamber 123, thereby improving the stability of the vaporization of the phase change working fluid.

[0141] For example, the battery cell 110 can be formed into a cuboid structure, and its first sidewall 112 is the sidewall with the largest area of ​​the battery cell 110. When the battery cell 110 is placed in the receiving cavity 121, the first sidewall 112 of the battery cell 110 contacts the bottom plate 124, and the bottom plate 124 can play the role of supporting the battery cell 110.

[0142] Furthermore, considering that the first sidewall 112 is the sidewall with the largest area of ​​the battery cell 110, in order to improve the temperature uniformity of the first sidewall 112, the temperature uniformity cavity 123 can be set on the bottom plate 124 so as to exchange heat with the battery cell 110 through the phase change working fluid and improve the temperature uniformity of the battery cell 110.

[0143] The wick 140 is disposed within the temperature equalization chamber 123 and is attached to at least one side wall of the temperature equalization chamber 123 in the first direction. For example, the wick 140 may be disposed on the side wall of the temperature equalization chamber 123 closer to the battery cell 110 in the first direction to reduce the distance between the wick 140 and the battery cell 110, thereby facilitating heat exchange between the phase change working fluid guided by the wick 140 and the battery cell 110 and improving the heat exchange effect of the battery cell 110. Alternatively, the wick 140 may be disposed on the side wall of the temperature equalization chamber 123 away from the battery cell 110 in the first direction to facilitate the assembly of the wick 140 and facilitate contact between the wick 140 and the liquid phase change working fluid, thereby improving the guiding convenience of the wick 140 for the liquid phase change working fluid.

[0144] Meanwhile, the wick 140 can be spaced apart from the surrounding plate 125 to form a cavity structure within the temperature equalization chamber 123. For example, the wick 140 can be disposed on the side wall of the temperature equalization chamber 123 closest to the battery cell 110 in the first direction, and spaced apart from the side wall of the temperature equalization chamber 123 furthest from the battery cell 110 in the first direction. The liquid level of the liquid phase change working fluid can partially submerge the wick 140. In this case, a cavity structure is defined between the liquid phase change working fluid, the wick 140, and the surrounding plate 125. The cavity structure can provide a buffer when the liquid phase change working fluid is converted into a gaseous state, reducing the risk of excessive pressure within the temperature equalization chamber 123. The risk of damage to the temperature equalization chamber 123 or failure of the phase change working fluid to vaporize; or, the liquid wick 140 can be disposed on the side wall of the temperature equalization chamber 123 away from the battery cell 110 in the first direction, and the liquid wick 140 can be spaced apart from the side wall of the temperature equalization chamber 123 close to the battery cell 110 in the first direction, so that the liquid wick 140 (or liquid phase change working fluid), the surrounding plate 125 and the side wall of the temperature equalization chamber 123 facing the battery cell 110 define a cavity structure. The cavity structure can provide a buffer when the liquid phase change working fluid is converted into a gaseous state, reducing the risk of excessive pressure in the temperature equalization chamber 123 causing damage to the temperature equalization chamber 123 or failure of the phase change working fluid to vaporize.

[0145] Please combine Figure 6 and Figure 7 In some embodiments of this application, the enclosure 125 includes first side plates 1251 disposed opposite to each other, the same end of the two first side plates 1251 is connected by a second side plate 1252, and each first side plate 1251 and at least one second side plate 1252 is provided with a heat exchange channel 122.

[0146] In the above technical solution, by providing heat exchange channels 122 in both the first side plate 1251 and at least one second side plate 1252, it is beneficial to increase the heat exchange area between the heat exchange channels 122 and the battery cell 110, thereby improving the heat exchange efficiency of the battery cell 110. Furthermore, it facilitates the connection of the heat exchange channels 122 in different side plates, which helps to extend the flow path of the heat exchange medium and allows the heat exchange medium to perform sufficient heat exchange.

[0147] For example, the enclosure 125 is disposed around the outside of the battery cell 110 in the circumferential direction. The enclosure 125 may include two opposing first side plates 1251 and two opposing second side plates 1252. The same end of the two first side plates 1251 is connected through the second side plates 1252. At least one second side plate 1252 is provided with a heat exchange channel 122. The heat exchange channel 122 provided in the second side plate 1252 can connect the heat exchange channels 122 provided in the two first side plates 1251. During the flow of the heat exchange medium, the heat exchange medium can flow through the two first side plates 1251 and at least one second side plate 1252 respectively, so as to effectively extend the flow path of the heat exchange medium, so that the heat exchange medium can fully exchange heat with the battery cell 110 and improve the energy utilization rate of the heat exchange medium.

[0148] Furthermore, compared to providing a heat exchange channel 122 only in one side plate of the enclosure 125, providing a heat exchange channel 122 in each first side plate 1251 and at least one second side plate 1252 can increase the area of ​​the heat exchange channel 122, which is beneficial to increasing the heat exchange area between the heat exchange channel 122 and the battery cell 110, thereby improving the heat exchange efficiency of the battery cell 110.

[0149] In some examples, one of the two second side plates 1252 is provided with a heat exchange channel 122 to simplify the processing steps of the support frame 120 and improve the production efficiency of the support frame 120, thereby improving the production efficiency of the battery device 100. In other examples, both second side plates 1252 are provided with heat exchange channels 122 to further increase the heat exchange area between the heat exchange channel 122 and the battery cell 110, thereby improving the heat exchange efficiency of the battery cell 110. It is understood that the specific number of second side plates 1252 with heat exchange channels 122 can be determined according to actual production requirements and is not specifically limited here.

[0150] like Figure 6 As shown, in some embodiments of this application, one of the first side plates 1251 is provided with a liquid inlet 126 and the other first side plate 1251 is provided with a liquid outlet 127.

[0151] In the above technical solution, by setting an inlet 126 in one of the first side plates 1251 and an outlet 127 in the other first side plate 1251, it is beneficial to extend the flow path of the heat exchange medium, so that the heat exchange medium can fully exchange heat with the battery cell 110 and improve the energy utilization rate of the heat exchange medium.

[0152] For example, the liquid inlet 126 and the liquid outlet 127 can be respectively set at the ends of the two first side plates 1251 near the second side plate 1252. When the heat exchange medium enters the heat exchange channel 122 in one of the two first side plates 1251 through the liquid inlet 126, the heat exchange medium must flow through the heat exchange channel 122 in one of the two first side plates 1251 to the heat exchange channel 122 in the other of the two first side plates 1251, and then flow out through the liquid outlet 127. That is to say, the heat exchange medium cannot flow in and out through the heat exchange channel 122 set on the same side plate alone. This can effectively extend the flow path of the heat exchange medium, so that the heat exchange medium can fully exchange heat with the battery cell 110.

[0153] Please refer to Figure 8 and Figure 9 In some embodiments of this application, the receiving cavity 121 has an opening on one side in a first direction for placing the battery cell 110. In the first direction, the heat exchange channel 122 extends toward the side of the heat equalizer 130 and is positioned directly opposite the heat equalizer 130.

[0154] In the above technical solution, by arranging the heat exchange channel 122 and the temperature equalization element 130 facing each other, the heat exchange medium in the heat exchange channel 122 and the phase change working fluid in the temperature equalization element 130 can exchange heat, which is beneficial to improving the heat exchange effect between the heat exchange medium and the phase change working fluid.

[0155] For example, the support frame 120 includes a base plate 124 and a surrounding plate 125. A heat exchange channel 122 is provided in the surrounding plate 125, and a temperature equalization cavity 123 for filling the phase change working fluid is formed in the base plate 124. Together, they define the temperature equalization element 130. That is, in the projection of the cavity 121 in the height direction, the projection surface of the heat exchange channel 122 is located on the circumferential outer side of the temperature equalization element 130.

[0156] Considering that the phase change working medium needs to exchange heat with the heat exchange medium to maintain its own heat exchange performance, the heat exchange channel 122 provided on the enclosure plate 125 can extend towards the bottom plate 124 (which can also be understood as the temperature equalization element 130) in a direction parallel to the opening provided in the receiving cavity 121. The heat exchange channel 122 can be arranged directly opposite the temperature equalization element 130 to reduce the distance between the heat exchange channel 122 and the temperature equalization element 130. This reduces the distance between the heat exchange medium and the phase change medium, facilitates heat exchange between the heat exchange medium and the phase change medium, and helps to improve the heat exchange effect between the heat exchange medium and the phase change medium.

[0157] Please refer to Figure 8 and Figure 9 In some embodiments of this application, the heat exchange channel 122 includes a plurality of spaced microchannels 1221.

[0158] It should be noted that "microchannel 1221" refers to a microchannel structure with an equivalent hydraulic diameter between 10μm and 1mm.

[0159] In the above technical solution, by including multiple spaced microchannels 1221 in the heat exchange channel 122, it is beneficial to increase the contact area of ​​the heat exchange medium, thereby improving the heat exchange efficiency of the heat exchange medium, and also beneficial to reduce the space occupied by the heat exchange flow, thereby reducing the volume of the support frame 120, which in turn is beneficial to realize the miniaturization design of the battery device 100, and also beneficial to reduce the amount of heat exchange medium used and reduce the heat exchange cost of the battery cell 110.

[0160] For example, multiple spaced microchannels 1221 can be arranged sequentially in the height direction of the receiving cavity 121. Compared with setting the heat exchange channel 122 as a single channel with a large diameter, setting multiple spaced microchannels 1221 can increase the heat exchange area per unit volume, which is beneficial to increase the contact area between the heat exchange medium and the channel wall, thereby improving the heat exchange efficiency. Furthermore, due to the high heat exchange efficiency, the space occupied by the heat exchange channel 122 can be reduced under the condition of achieving the same heat exchange effect, which is beneficial to reduce the volume of the support frame 120, and can also reduce the amount of heat exchange medium used, thereby reducing the heat exchange cost.

[0161] In some embodiments of this application, the battery cell 110 is a pouch battery cell.

[0162] In the above technical solution, by configuring the battery cell 110 as a soft-pack battery cell, it is beneficial to improve the fit between the housing of the battery cell 110 and the inner wall of the receiving cavity 121, increase the contact area between the battery cell 110 and the support frame 120, and reduce the thermal resistance when the battery cell 110 contacts the support frame 120, so as to improve the heat exchange efficiency of the battery cell 110.

[0163] For example, the battery cell 110 is a pouch battery cell, that is, the housing of the battery cell 110 is a flexible housing. When the battery cell 110 is placed in the receiving cavity 121, the housing of the battery cell 110 can undergo slight deformation under the pressure exerted by the support frame 120, so as to improve the fit between the housing of the battery cell 110 and the support frame 120, increase the contact area between the battery cell 110 and the support frame 120, and help reduce the porosity between the housing of the battery cell 110 and the support frame 120, so as to reduce the thermal resistance when the battery cell 110 contacts the support frame 120, thereby effectively improving the heat exchange efficiency of the battery cell 110.

[0164] In some examples, the housing of the battery cell 110 can directly contact and fit with the support frame 120; in other examples, the housing of the battery cell 110 can be connected to the support frame 120 through thermally conductive adhesive; it is understood that the specific fit between the housing of the battery cell 110 and the support frame 120 can be determined according to actual production requirements, and no specific limitation is made here.

[0165] Please refer to Figure 3 In some embodiments of this application, there are multiple support frames 120, each support frame 120 is provided with a battery cell 110, and the heat exchange channels 122 of the multiple support frames 120 are connected.

[0166] In the above technical solution, by setting up multiple support frames 120 and connecting the heat exchange channels 122 of the multiple support frames 120, it is beneficial to simplify the structure of the battery device 100, reduce the material cost of the battery device 100, and facilitate the miniaturization design of the battery device 100.

[0167] For example, the liquid inlets 126 of the heat exchange channels 122 of multiple support frames 120 can be directly connected, or the liquid inlets 126 of multiple support frames 120 can be connected through a pipe body. Correspondingly, the liquid outlets 127 of the heat exchange channels 122 of multiple support frames 120 can be directly connected, or the liquid outlets 127 of multiple support frames 120 can be connected through a pipe body. That is to say, the liquid inlets 126 of the heat exchange channels 122 of multiple support frames 120 can be combined to form a port that can be used to input the heat exchange medium, and the liquid outlets 127 of the heat exchange channels 122 of multiple support frames 120 can be combined to form a port that can be used to output the heat exchange medium. Multiple support frames 120 can share a set of pipe structures to connect with the external heat exchange system, without the need to set up separate pipes for each support frame 120 to connect with the external heat exchange system. This is beneficial to simplify the component settings of the battery device 100, reduce the cost of the battery device 100, and facilitate the miniaturization design of the battery device 100.

[0168] like Figure 3 As shown, in some embodiments of this application, multiple support frames 120 are stacked, the inlets 126 of the heat exchange channels 122 of the multiple support frames 120 are arranged opposite each other to communicate, and the outlets 127 of the heat exchange channels 122 of the multiple support frames 120 are arranged opposite each other to communicate.

[0169] In the above technical solution, by stacking multiple support frames 120, it is beneficial to improve the space utilization of the battery device 100 in the direction parallel to the stacking of the multiple support frames 120, thereby reducing the size of the battery device 100 in other directions. Furthermore, by arranging the liquid inlets 126 of the heat exchange channels 122 of the multiple support frames 120 facing each other and the liquid outlets 127 of the heat exchange channels 122 of the multiple support frames 120 facing each other, it is possible to connect the heat exchange channels 122 of the multiple support frames 120 to each other, and it is beneficial to improve the structural compactness of the battery device 100, making it easier to realize the miniaturization design of the battery device 100.

[0170] For example, multiple support frames 120 can be stacked vertically one by one. The base plate 124 of each support frame 120 can cover the open end of the receiving cavity 121 of the support frame 120 located below it. The liquid inlets 126 of the heat exchange channels 122 of the multiple support frames 120 can be arranged facing each other vertically so that the liquid inlets 126 of the heat exchange channels 122 of the multiple support frames 120 can be directly connected. Correspondingly, the liquid outlets 127 of the heat exchange channels 122 of the multiple support frames 120 are arranged facing each other vertically so that the liquid outlets 127 of the heat exchange channels 122 of the multiple support frames 120 can be directly connected. There is no need to set up additional pipes, so as to simplify the component arrangement of the battery device 100, reduce the production cost of the battery device 100, and facilitate the miniaturization design of the battery device 100.

[0171] In another embodiment of this application, a plurality of support frames 120 are laid flat, and the liquid inlets 126 of the heat exchange channels 122 of the plurality of support frames 120 are arranged opposite each other to communicate, and the liquid outlets 127 of the heat exchange channels 122 of the plurality of support frames 120 are arranged opposite each other to communicate.

[0172] In the above technical solution, by arranging multiple support frames 120 in a flat manner, it is beneficial to improve the space utilization rate of the battery device 100 in the direction parallel to the laying direction of the multiple support frames 120, thereby reducing the size of the battery device 100 in other directions. Furthermore, by arranging the liquid inlets 126 of the heat exchange channels 122 of the multiple support frames 120 facing each other and the liquid outlets 127 of the heat exchange channels 122 of the multiple support frames 120 facing each other, it is possible to connect the heat exchange channels 122 of the multiple support frames 120 to each other, and it is beneficial to improve the structural compactness of the battery device 100, making it easier to realize the miniaturization design of the battery device 100.

[0173] For example, multiple support frames 120 can be laid flat in the horizontal direction, and the liquid inlets 126 of the heat exchange channels 122 of the multiple support frames 120 can be arranged facing each other in the horizontal direction so that the liquid inlets 126 of the heat exchange channels 122 of the multiple support frames 120 can be directly connected. Correspondingly, the liquid outlets 127 of the heat exchange channels 122 of the multiple support frames 120 are arranged facing each other in the horizontal direction so that the liquid outlets 127 of the heat exchange channels 122 of the multiple support frames 120 can be directly connected. There is no need to set up additional pipes, so as to simplify the component arrangement of the battery device 100, reduce the production cost of the battery device 100, and facilitate the miniaturization design of the battery device 100.

[0174] In some embodiments of this application, each support frame 120 is provided with a sealing element at its inlet 126 and outlet 127, and the sealing element is sandwiched between two adjacent support frames 120.

[0175] In the above technical solution, by setting a sealing element, the sealing performance at the position where the heat exchange channels 122 of the multiple support frames 120 are interconnected is improved, the risk of heat exchange medium leakage is reduced, which is beneficial to improving the service life of the battery device 100 and improving the heat exchange effect of the heat exchange medium.

[0176] For example, each support frame 120 has a sealing groove surrounding its liquid inlet 126 and liquid outlet 127. The seal can be embedded in the sealing groove. After the multiple support frames 120 are assembled, the seal can be clamped between two adjacent support frame 120 brackets to seal the connection position of the heat exchange channels 122 of the multiple support frames 120, thereby reducing the risk of heat exchange medium leakage.

[0177] Please refer to Figure 3 In some embodiments of this application, the receiving cavity 121 has an opening on one side in the first direction for placing the battery cell 110, and a heat insulation member 150 is provided on the side of the battery cell 110 facing the opening.

[0178] In the above technical solution, by placing the heat insulation member 150 on the side of the battery cell 110 facing the opening, when one of the battery cells 110 experiences thermal runaway, the heat insulation member 150 can reduce the risk that the battery cell 110 will heat up the adjacent battery cells 110, thereby reducing the risk that the remaining battery cells 110 will also experience thermal runaway and improving the safety of the battery device 100.

[0179] For example, multiple support frames 120 can be stacked one on top of each other in the vertical direction. The base plate 124 of each support frame 120 can cover the open end of the receiving cavity 121 of the support frame 120 below it. The heat insulation member 150 can be disposed on one side of the battery cell 110 located at the open end of the receiving cavity 121, so as to realize the heat insulation member 150 between the battery cell 110 and the adjacent support frame 120, reduce the risk of thermal runaway propagation, and thus help improve the safety of the battery device 100.

[0180] In some embodiments of this application, at least a portion of the thermal insulation element 150 is made of an elastic material.

[0181] In the above technical solution, by setting at least a portion of the heat insulation component 150 as an elastic material, the heat insulation component 150 can not only reduce the risk of thermal runaway propagation of the battery cell 110, but also play a role in buffering and shock absorption to absorb vibration energy, provide buffer protection for the battery cell 110, reduce the risk of damage to the battery cell 110, and thus help improve the service life of the battery device 100.

[0182] In some examples, the entire insulation 150 can be made of a resilient material; in other examples, the insulation 150 can be made of a resilient material around its perimeter.

[0183] In some specific embodiments, the material at the center of the heat insulation component 150 can be composed of a composite of ceramic fiber and aerogel, or the material at the center of the heat insulation component 150 can be composed of a composite of glass fiber and aerogel, so that the center of the heat insulation component 150 can withstand vibration and pressure, while also having strong high temperature resistance and heat insulation capabilities; the periphery of the heat insulation component 150 can be composed of modified polypropylene (MPP) to improve the performance of the heat insulation component 150 in withstanding vibration and pressure, thereby improving the buffering effect of the heat insulation component 150.

[0184] Please refer to Figure 3 In some embodiments of this application, the battery device 100 further includes a housing 160, with a plurality of support frames 120 disposed inside the housing 160. The housing 160 is provided with an inlet pipe and an outlet pipe. The inlet pipe is connected to a heat exchange channel 122 of one of the support frames 120, and the outlet pipe is connected to a heat exchange channel 122 of one of the support frames 120.

[0185] In the above technical solution, by setting an inlet pipe and an outlet pipe on the housing 160, and connecting the inlet pipe to the heat exchange channel 122 of one of the support frames 120, and connecting the outlet pipe to the heat exchange channel 122 of one of the support frames 120, it is beneficial to improve the convenience of communication between the heat exchange channels 122 of multiple support frames 120 and the inlet pipe and outlet pipe. Moreover, it is not necessary to set multiple inlet pipes and multiple outlet pipes that are connected to the heat exchange channels 122 of multiple support frames 120 one-to-one. This is beneficial to simplify the structure of the battery device 100, reduce the material cost of the battery device 100, and facilitate the miniaturization design of the battery device 100.

[0186] For example, the liquid inlet pipe can be correspondingly set and connected to the liquid inlet 126 of the heat exchange channel 122 of one of the support frames 120, and the liquid outlet pipe can be correspondingly set and connected to the liquid outlet 127 of the heat exchange channel 122 of one of the support frames 120. Since the heat exchange channels 122 of multiple support frames 120 are connected, the heat exchange channels 122 of multiple support frames 120 can share a set of liquid inlet pipe and liquid outlet pipe, which is beneficial to simplify the setting of liquid inlet pipe and liquid outlet pipe, and can effectively improve the convenience of connection between liquid inlet pipe and liquid outlet pipe and the heat exchange channels 122 of multiple support frames 120.

[0187] In some examples, the inlet pipe and the outlet pipe can be connected to the heat exchange channel 122 of the same support frame 120; or, the inlet pipe and the outlet pipe can be connected to the heat exchange channel 122 of different support frames 120 respectively. It is understood that the specific arrangement of the inlet pipe and the outlet pipe can be determined according to the actual production requirements, and no specific limitation is made here.

[0188] like Figure 3 As shown, in some embodiments of this application, the housing 160 is provided with a first interface 161 and a second interface 162. The first interface 161 is used to communicate with one of the inlet pipe and the outlet pipe, and the second interface 162 is used to communicate with the other of the inlet pipe and the outlet pipe. By providing the first interface 161 and the second interface 162 on the housing 160, it is convenient to position and install the inlet pipe and the outlet pipe with the housing 160, which helps to improve the assembly convenience of the inlet pipe and the outlet pipe with the housing 160.

[0189] In some specific embodiments, the housing 160 is provided with a flange structure, and the first interface 161 and the second interface 162 are respectively defined by the flange structure. The flange structure allows the inlet pipe and the outlet pipe to be detachably connected to the housing 160, which is beneficial to improving the ease of disassembly and assembly between the inlet pipe and the outlet pipe and the housing 160, and also beneficial to improving the reliability of the connection between the inlet pipe and the outlet pipe and the housing 160.

[0190] Please refer to Figure 3In some embodiments of this application, the housing 160 includes a first sub-box 163 and a second sub-box 164. The first sub-box 163 and the second sub-box 164 are fastened together and together define an assembly space for accommodating components such as the battery cell 110 and the support frame 120. The first sub-box 163 and the second sub-box 164 can be constructed as hollow structures open to each other. After the first sub-box 163 and the second sub-box 164 are fastened together, they together define the assembly space. At least one of the first sub-box 163 and the second sub-box 164 can function as a support for components such as the battery cell 110 and the support frame 120, thereby improving the structural stability of the battery device 100. Furthermore, the first sub-box 163 and the second sub-box 164 together can protect components such as the battery cell 110 and the support frame 120, reducing the risk of mechanical damage.

[0191] like Figure 3 As shown, in some embodiments of this application, the first sub-box 163 includes a first part 1631 and a second part 1632. The first part 1631 can be constructed as a plate with a U-shaped cross-section. The second part 1632 can be disposed on both sides of the first part 1631 and together with the first part 1631 to form a hollow structure with one side open. The first part 1631 and the second part 1632 can be spliced ​​together to form the first sub-box 163, thereby reducing the processing difficulty of the first sub-box 163 and improving the processing convenience of the first sub-box 163.

[0192] The second sub-box 164 may include a second part 1632 and a third part 1641. The third part 1641 may be constructed as a plate with a U-shaped cross-section. The fourth part 1642 may be set on both sides of the third part 1641 and together with the third part 1641 to form a hollow structure with one side open. The third part 1641 and the fourth part 1642 may be spliced ​​together to form the second sub-box 164, thereby reducing the processing difficulty of the second sub-box 164 and improving the processing convenience of the second sub-box 164.

[0193] Secondly, this application provides an energy storage device 200, which includes a plurality of the aforementioned battery devices 100, the battery devices 100 being used to store or provide electrical energy.

[0194] In the above technical solution, since the energy storage device 200 adopts the aforementioned battery device 100, a heat exchange channel 122 is provided in the support frame 120 of the battery device 100 to facilitate heat exchange on the battery cells 110, thereby improving the heat exchange effect of the battery cells 110, which in turn helps to improve the charging and discharging performance and safety of the battery device 100. Furthermore, it can improve the integration of the support frame 120, eliminating the need for a separate component for heat exchange on the battery cells 110, which simplifies the structure of the battery device 100 and facilitates the miniaturization design of the battery device 100, thus contributing to the miniaturization design of the energy storage device 200.

[0195] Thirdly, this application provides an electrical device 300, including the aforementioned battery device 100 or the aforementioned energy storage device 200, wherein the battery device 100 is used to store or provide electrical energy.

[0196] In the above technical solution, since the power device 300 adopts the battery device 100, a heat exchange channel 122 is provided in the support frame 120 of the battery device 100 to facilitate heat exchange of the battery cells 110, improve the heat exchange effect of the battery cells 110, thereby improving the heat exchange effect of the battery device 100, and further improving the charging and discharging performance and safety of the battery device 100; it can also improve the integration of the support frame 120, eliminating the need for a separate component for heat exchange of the battery cells 110, which simplifies the structure of the battery device 100 and facilitates the miniaturization design of the battery device 100, thereby reducing the space required for the battery device 100 and saving space in the power device 300 for arranging other components.

[0197] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0198] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery cell, the battery cell comprising a first region and a second region with different temperatures; Multiple stacked support frames are provided, each support frame having a cavity for placing the battery cell, and the cavity having an opening for placing the battery cell on one side in a first direction. Each support frame contains the battery cell and has a heat exchange channel for containing a heat exchange medium. The heat exchange channel is located outside the cavity to allow heat exchange between the heat exchange medium and the battery cell. The heat exchange channels of the multiple support frames are interconnected, and each support frame has a temperature equalization cavity spaced apart from the heat exchange channel. The temperature equalization cavity is used to house a phase change working fluid and a liquid absorbent core to form a temperature equalization element. The temperature equalization element is thermally connected to the battery cell, and in the first direction, the heat exchange channel extends toward the side of the temperature equalization element and is directly opposite the temperature equalization element. In this configuration, a portion of the liquid-absorbing core is disposed corresponding to the first region, and another portion of the liquid-absorbing core is disposed corresponding to the second region, so that the temperature equalization element can adjust the temperature difference between the first region and the second region, and the phase change working fluid can be converted between the gas and liquid phases under the influence of the heat of the battery cell.

2. The battery device according to claim 1, characterized in that, The heat exchanger exchanges heat with the first sidewall of the battery cell, and the heat exchange channel exchanges heat with the second sidewall of the battery cell. The first sidewall and the second sidewall are adjacent to each other and intersecting.

3. The battery device according to claim 1, characterized in that, The support frame includes a base plate and a surrounding plate connected to the base plate. The base plate is used to support the battery cell. The surrounding plate is arranged around the base plate in the circumferential direction. The base plate and the surrounding plate define the receiving cavity. The heat exchange channel is located inside the surrounding plate. The temperature equalization cavity is provided inside the base plate.

4. The battery device according to claim 3, characterized in that, The base plate is supported on the first sidewall of the battery cell, and the first sidewall is the sidewall with the largest area of ​​the battery cell. The liquid-absorbing core is attached to one side of the temperature equalization chamber in the first direction and is spaced apart from the surrounding plate.

5. The battery device according to claim 3, characterized in that, The enclosure includes opposing first side plates, with the same end of the two first side plates connected by a second side plate, and each of the first side plates and at least one second side plate is provided with the heat exchange channel.

6. The battery device according to claim 5, characterized in that, One of the first side plates is provided with a liquid inlet and the other first side plate is provided with a liquid outlet.

7. The battery device according to claim 1, characterized in that, The heat exchange channel includes multiple spaced microchannels.

8. The battery device according to any one of claims 1-7, characterized in that, The battery cell is a pouch cell.

9. The battery device according to claim 1, characterized in that, The liquid inlets of the heat exchange channels of the plurality of support frames are arranged opposite each other to communicate with each other, and the liquid outlets of the heat exchange channels of the plurality of support frames are arranged opposite each other to communicate with each other.

10. The battery device according to claim 9, characterized in that, The receiving cavity has an opening on one side in the first direction for placing the battery cell, and the side of the battery cell facing the opening is provided with a heat insulation member.

11. The battery device according to claim 10, characterized in that, At least a portion of the insulation element is made of an elastic material.

12. The battery device according to claim 1, characterized in that, It also includes a housing, with multiple support frames disposed inside the housing. The housing is provided with an inlet pipe and an outlet pipe. The inlet pipe is connected to the heat exchange channel of one of the support frames, and the outlet pipe is connected to the heat exchange channel of one of the support frames.

13. An energy storage device, characterized in that, It includes a plurality of battery devices according to any one of claims 1-12, the battery devices being used to store or provide electrical energy.

14. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1-12 or an energy storage device according to claim 13, wherein the battery device is used to store or provide electrical energy.

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