Battery monomer, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery monomer, a battery pack and electric equipment, the battery monomer comprises a battery assembly, the battery assembly comprises a battery shell and a battery body, the battery shell is used for accommodating the battery body, and the battery body is provided with a tab structure; the switching assembly is arranged on one side of the battery body, and the switching assembly is connected with the tab structure; the heat conduction assembly is arranged on the side, away from the battery body, of the switching assembly, and the heat conduction assembly is attached to the tab structure. The switching assembly is connected with the tab structure, the heat conduction assembly is attached to the tab structure, and when the battery monomer is charged and discharged, heat generated by the battery monomer can be conducted through the tab structure, the switching assembly and the heat conduction assembly in sequence, so that the heat of the battery monomer can be timely led out, heat conduction is remarkably enhanced, and a heat management path is formed; therefore, the safety of the battery monomer is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell, a battery pack and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the development of battery technology, in addition to improving the energy density of batteries, the safety of batteries is also an issue that cannot be ignored. Therefore, how to improve the safety of batteries is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery cell, a battery pack and an electrical device that can promptly remove the heat inside the battery cell, significantly enhance heat conduction, form a thermal management path, and thus improve the safety of the battery cell.

[0005] In a first aspect, an embodiment of the present application provides a battery cell, comprising: a battery assembly, comprising a battery shell and a battery body, the battery shell being configured to accommodate the battery body, the battery body being configured with a pole lug structure; a adapter assembly, arranged on one side of the battery body, and the adapter assembly being connected to the pole lug structure; a heat-conducting assembly, arranged on a side of the adapter assembly facing away from the battery body, and the heat-conducting assembly being attached to the pole lug structure.

[0006] In the above-mentioned implementation process, the adapter assembly is connected to the pole ear structure, and the thermal conductive assembly is attached to the pole ear structure. When the battery cell is charged and discharged, the heat generated can be conducted in sequence through the pole ear structure, the adapter assembly and the thermal conductive assembly, which is beneficial to the timely discharge of heat from the battery cell, significantly enhancing heat conduction, forming a thermal management path, and thus improving the safety of the battery cell.

[0007] In some embodiments, the adapter assembly includes a first adapter plate and a second adapter plate, the pole ear structure includes a first pole ear and a second pole ear, the first adapter plate is located on one side of the battery body, and the first adapter plate is connected to the first pole ear, the second adapter plate is located on the other side of the battery body, and the second adapter plate is connected to the second pole ear.

[0008] In the above implementation process, the first connecting piece is connected to the first tab, and the second connecting piece is connected to the second tab, which can conduct heat at the first tab and the second tab. Under the action of the first connecting piece and the second connecting piece, the heat inside the battery cell can be quickly exported, significantly enhancing the heat conduction at the tab structure, thereby improving the safety of the battery cell.

[0009] In some embodiments, the first connecting piece is configured with a first through-hole grid, and the first tab passes through the first through-hole grid. This is beneficial to the connection between the first tab and the first connecting piece, and further quickly exports the heat inside the battery cell, improving the safety of the battery cell.

[0010] In some embodiments, the second connecting piece is configured with a second through-hole grid, and the second tab passes through the second through-hole grid. This is beneficial to the connection between the second tab and the second connecting piece, and further quickly exports the heat inside the battery cell, improving the safety of the battery cell.

[0011] In some embodiments, the heat conduction component includes a first heat conduction piece and a second heat conduction piece. The first heat conduction piece is attached to the first tab, and the second heat conduction piece is attached to the second tab.

[0012] In the above implementation process, the heat of the first tab can be exported by the first heat conduction piece, and the heat of the second tab can be exported by the second heat conduction piece, realizing heat conduction on the tab side, effectively exporting the heat inside the battery cell in time, forming a heat management path based on the side of the battery cell, which is beneficial to improving the safety of the battery cell.

[0013] In some embodiments, the first heat conduction piece is configured with a first groove, and the first groove is configured to accommodate the first tab. The second heat conduction piece is configured with a second groove, and the second groove is configured to accommodate the second tab.

[0014] In the above implementation process, the first groove is used to adapt to the first tab, which can make the first heat conduction piece better fit the first tab. The second groove is used to adapt to the second tab, which can make the second heat conduction piece better fit the second tab, so as to fully fill the gap between the side of the battery body and the battery housing, improve the heat conduction effect, and is beneficial to the export of the heat inside the battery cell.

[0015] In some embodiments, the battery cell further includes a terminal assembly, the terminal assembly is disposed at the upper end of the battery housing, the first tab is disposed on the left side of the battery housing, and the second tab is disposed on the right side of the battery housing.

[0016] In the above implementation process, the pole assembly and the tab structure are located at different positions of the battery case, and can conduct the heat of the battery cell along a position different from that of the pole assembly, avoiding affecting the pole assembly and improving the safety of the overall structure.

[0017] In some embodiments, the pole assembly includes a positive pole and a negative pole, the positive pole and the negative pole are spaced apart, and the first adapter plate is connected to the positive pole, and the second adapter plate is connected to the negative pole. The connection between the pole assembly and the battery body can be realized through the adapter assembly, which is beneficial to the charge and discharge of the battery cell, and can also improve the space utilization rate of the battery cell, thereby improving the energy density of the battery cell.

[0018] In some embodiments, the battery cell further includes a pressure relief valve, the pressure relief valve is connected to the battery case, and the pressure relief valve and the tab structure are located on adjacent sides of the battery case.

[0019] In a second aspect, the present application further provides a battery pack, including: a liquid cooling assembly, including a liquid cooling plate and a liquid cooling pipeline, the liquid cooling plate is connected to the liquid cooling pipeline, and a plurality of liquid cooling plates are arranged along a first direction; and a battery cell as described in any one of the above, a plurality of battery cells are arranged along a second direction to form a battery pack, and a plurality of rows of the battery pack are arranged along the first direction, and the heat conduction component of the battery cell is in contact with the liquid cooling plate, wherein the first direction is perpendicular to the second direction.

[0020] In the above implementation process, based on the heat conduction component of the liquid cooling plate and the battery cell, rapid heat conduction can be carried out on the side of the battery cell, without occupying the space in the arrangement direction of the battery cell. At the same time, the liquid cooling plate plays a role in thermal isolation and electrical isolation between battery packs, avoiding the thermal spread of battery cells to adjacent battery packs and the risk of short-circuit arcing during thermal runaway, and improving the thermal management efficiency of the battery pack.

[0021] In some embodiments, the battery pack further includes a housing structure, the housing structure includes a battery upper cover and a battery lower case, the battery upper cover is connected to the battery lower case to enclose a receiving cavity, and the receiving cavity is configured to receive the liquid cooling assembly and the battery pack.

[0022] In the above implementation process, the housing structure is used to accommodate the liquid cooling assembly and the battery pack. The liquid cooling assembly does not occupy the space in the arrangement direction of the battery cell, improving the space utilization rate of the housing structure and being beneficial to improving the energy density of the battery pack.

[0023] In a third aspect, the present application further provides an electrical device, including the battery pack as described in any one of the above.

[0024] Since the electrical equipment provided by the third party includes a battery pack, the electrical equipment has all the technical effects of the battery pack, which will not be elaborated here.

[0025] Other features and advantages of the present disclosure will be described in the following specification, or some features and advantages can be inferred from the specification or determined without doubt, or can be learned by implementing the above technologies of the present disclosure.

[0026] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0027] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0028] Figure 1 Structural schematic diagram of the battery cell provided by the embodiment of the present application;

[0029] Figure 2 Explosion schematic diagram of the battery cell provided by the embodiment of the present application;

[0030] Figure 3 Side structural schematic diagram of the battery cell provided by the embodiment of the present application;

[0031] Figure 4 Structural schematic diagram of the heat conduction component of the battery cell provided by the embodiment of the present application;

[0032] Figure 5 Structural schematic diagram of the battery pack provided by the embodiment of the present application.

[0033] Reference Signs

[0034] 100, battery assembly; 101, battery housing; 102, battery body; 1021, tab structure; 200, transfer assembly; 201, first transfer sheet; 2011, first through-hole grid; 202, second transfer sheet; 2021, second through-hole grid; 300, heat conduction component; 301, first heat conduction member; 3011, first groove; 302, second heat conduction member; 3021, second groove; 400, positive terminal; 500, negative terminal; 600, pressure relief valve; 700, liquid cooling plate; 800, liquid cooling pipeline; 900, battery upper cover; 1000, battery lower housing. Detailed Description of the Embodiments

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0036] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0037] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances.

[0038] In addition, the terms "mount", "set", "provided with", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "a plurality" is two or more.

[0040] Embodiment

[0041] At present, for the thermal management of power batteries in new energy vehicles, based on the spatial layout within the battery pack, most adopt the method of bottom liquid cooling plates. The battery is cooled by circulating coolant within the liquid cooling plates or heated by heating the coolant to further transfer heat to the battery for temperature increase. However, when using the bottom liquid cooling method, temperature adjustment can only be carried out through heat conduction at the bottom of the battery. The overall heat conduction path of the battery is relatively long, and the temperature adjustment efficiency is low. In addition, in the thermal safety protection of power batteries, the protection of the liquid cooling plate against thermal runaway of the battery only reflects the absorption and transfer of the heat generated by the thermal runaway of the battery to delay or prevent the occurrence of thermal spread. Moreover, the slow longitudinal heat transfer ability is difficult to achieve rapid cooling of the battery within a limited time. Therefore, it is difficult to effectively prevent the thermal spread and the occurrence of fire combustion after the thermal runaway of the battery.

[0042] With the development of the module-free structural design scheme, the integration degree of the battery pack has increased significantly, and the volume utilization rate has been continuously improved. This has also significantly increased the requirements for the thermal management and thermal safety protection of the battery system. For example, in the Kirin battery scheme, a vertical liquid cooling plate structure is adopted. The vertical liquid cooling plate is arranged between the large faces of the battery cells to improve the liquid cooling efficiency. At the same time, the liquid cooling plate is integrated into an elastic interlayer to achieve four functions: support, buffering, liquid cooling, and heat insulation. However, this design method of arranging the vertical liquid cooling plate between the large faces of the battery cells will significantly compress the space in the battery arrangement direction, which is not conducive to the improvement of the energy density of the battery pack.

[0043] The interior of a lithium-ion battery is composed of current collectors, active materials, separators, etc. Therefore, the thermal conductivity of lithium-ion batteries has significant anisotropy. Research shows that there are significant differences in thermal conductivity between the direction perpendicular to the electrode plate and the direction parallel to the electrode plate of lithium-ion batteries. The thermal conductivity in the direction parallel to the electrode plate is more than 30 times that in the direction perpendicular to the electrode plate. This is because there are separators and gaps in the direction perpendicular to the electrode plate. The separator is a poor conductor of heat, and the gaps between the electrode plates will also significantly hinder the heat conduction in the vertical direction. In the direction parallel to the electrode plate, the metal current collector is a continuous whole, which has good thermal conductivity (the thermal conductivity of the aluminum current collector is 217.7 W / (m·K); the thermal conductivity of the copper current collector is 401 W / (m·K)), and can achieve rapid heat conduction. Therefore, theoretically, the heat conduction effect on the side and bottom of the battery case should be better than that on the large faces of the battery. However, due to the poor contact between the battery core and the side and bottom of the battery, the thermal resistance is very large, seriously hindering the progress of heat conduction.

[0044] In view of this, such as Figures 1 - 5As shown, in the first aspect, an embodiment of the present application provides a battery cell, including: a battery assembly 100, including a battery shell 101 and a battery body 102, the battery shell 101 is configured to accommodate the battery body 102, and the battery body 102 is provided with a pole ear structure 1021; an adapter assembly 200, arranged on one side of the battery body 102, and the adapter assembly 200 is connected to the pole ear structure 1021; a heat-conducting assembly 300, which is arranged on a side of the adapter assembly 200 away from the battery body 102, and the heat-conducting assembly 300 is attached to the pole ear structure 1021.

[0045] Exemplarily, the battery cells include but are not limited to square shell batteries. The battery body 102 of the battery cell can adopt a laminated battery cell. After the battery body 102 is stacked, its pole ear structure 1021 is ultrasonically pre-welded so that the pole ear structure 1021 forms a tight pole ear group. The length direction of the battery body 102 includes but is not limited to the left and right direction. The pole ear structure 1021 is configured on the left and right sides of the battery body 102, wherein the pole ear structure 1021 is preferably a full pole ear structure 1021, which can enhance the thermal conductivity area of the pole ear position, thereby improving the thermal conductivity of the side of the battery cell.

[0046] In the above-mentioned implementation process, the adapter component 200 is connected to the pole ear structure 1021, and the thermal conductive component 300 is attached to the pole ear structure 1021. When the battery cell is charged and discharged, the heat generated can be conducted in sequence through the pole ear structure 1021, the adapter component 200 and the thermal conductive component 300, which is beneficial to the timely discharge of heat from the battery cell, significantly enhancing heat conduction, forming a thermal management path, and thus improving the safety of the battery cell.

[0047] like Figures 2 - 3 As shown, the adapter assembly 200 includes a first adapter plate 201 and a second adapter plate 202, the pole ear structure 1021 includes a first pole ear and a second pole ear, the first adapter plate 201 is located on one side of the battery body 102, and the first adapter plate 201 is connected to the first pole ear, the second adapter plate 202 is located on the other side of the battery body 102, and the second adapter plate 202 is connected to the second pole ear.

[0048] Exemplarily, the first pole ear includes but is not limited to the positive pole ear, and correspondingly, the first adapter sheet 201 is a positive pole adapter sheet, the second pole ear includes but is not limited to the negative pole ear, and the second adapter sheet 202 is a negative pole adapter sheet. The first adapter sheet 201 and the second adapter sheet 202 are both composed of 6-8 layers of metal sheets with a thickness of 0.1 mm, the first adapter sheet 201 includes metal aluminum, and the second adapter sheet 202 includes metal copper.

[0049] It should be noted that both the first adapter piece 201 and the second adapter piece 202 can be configured as L-shaped, so that the vertical section of the adapter assembly 200 is connected to the tab structure 1021 (ultrasonic welding), and the horizontal section of the adapter assembly 200 is connected to the terminal assembly of the battery cell (laser welding).

[0050] In the above implementation process, the first adapter piece 201 is connected to the first tab, and the second adapter piece 202 is connected to the second tab, which can conduct heat at the first tab and the second tab. Under the action of the first adapter piece 201 and the second adapter piece 202, the heat inside the battery cell can be quickly exported, significantly enhancing the heat conduction at the tab structure 1021, thereby improving the safety of the battery cell.

[0051] In some embodiments, the first adapter piece 201 is configured with a first through-hole grid 2011, and the first tab passes through the first through-hole grid 2011. This is beneficial to the connection between the first tab and the first adapter piece 201, and then quickly exports the heat inside the battery cell, improving the safety of the battery cell.

[0052] In some embodiments, the second adapter piece 202 is configured with a second through-hole grid 2021, and the second tab passes through the second through-hole grid 2021. This is beneficial to the connection between the second tab and the second adapter piece 202, and then quickly exports the heat inside the battery cell, improving the safety of the battery cell.

[0053] As Figure 4 shown, the heat conduction assembly 300 includes a first heat conduction piece 301 and a second heat conduction piece 302. The first heat conduction piece 301 is attached to the first tab, and the second heat conduction piece 302 is attached to the second tab.

[0054] Exemplarily, the first heat conduction piece 301 includes but is not limited to a heat-conducting insulating sheet, and the second heat conduction piece 302 includes but is not limited to a heat-conducting insulating sheet. Of course, the heat-conducting insulating sheet can also be replaced with a structure such as a heat-conducting gel that has high heat conductivity, insulation, and resistance to electrolyte corrosion. The first heat conduction piece 301 is attached to the outer surface of the first adapter piece 201 and covers the first tab, and the second heat conduction piece 302 is attached to the outer surface of the second adapter piece 202 and covers the second tab.

[0055] It should be noted that the first heat conduction piece 301 and the second heat conduction piece 302 should meet the requirements of high heat conductivity (>3 W / (m·K)), high insulation (breakdown strength >15 kV / mm), and resistance to electrolyte corrosion.

[0056] In the above implementation process, the heat of the first pole ear can be extracted by the first heat conductive member 301, and the heat of the second pole ear can be extracted by the second heat conductive member 302, thereby realizing heat conduction on the pole ear side, effectively extracting the heat inside the battery cell in a timely manner, and forming a thermal management path based on the side of the battery cell, which is beneficial to improving the safety of the battery cell.

[0057] After the adapter component 200 is welded to the pole ear structure 1021, its side surface will be uneven and the welded pole ear will be protruding. In order to fit tightly and enhance the thermal conductivity, the internal shape of the thermal conductive component 300 needs to match its side surface. The first thermal conductive member 301 is provided with a first groove 3011, which is configured to accommodate the first pole ear. The second thermal conductive member 302 is provided with a second groove 3021, which is configured to accommodate the second pole ear. The thinner the thickness of the first thermal conductive member 301 and the second thermal conductive member 302 is, the better. The gap between the pole ear structure 1021 and the side shell can be fully filled. The thinnest part of the first thermal conductive member 301 and the second thermal conductive member 302 should be less than 1 mm to ensure the thermal conductivity.

[0058] In the above implementation process, the first groove 3011 is used to adapt to the first pole ear, so that the first heat conductor 301 can better fit the first pole ear, and the second groove 3021 is used to adapt to the second pole ear, so that the second heat conductor 302 can better fit the second pole ear, thereby fully filling the gap between the side of the battery body 102 and the battery shell 101, improving the thermal conductivity effect, and facilitating the heat dissipation inside the battery cell.

[0059] In some embodiments, the battery cell further includes a pole assembly, which is disposed at the upper end of the battery housing 101 , the first pole lug is disposed at the left side of the battery housing 101 , and the second pole lug is disposed at the right side of the battery housing 101 .

[0060] In the above implementation process, the pole assembly and the pole ear structure 1021 are located at different positions of the battery housing 101, which can guide the heat of the battery cell along a position different from the pole assembly, avoid affecting the pole assembly, and improve the safety of the overall structure.

[0061] In some embodiments, the pole assembly includes a positive pole 400 and a negative pole 500, the positive pole 400 and the negative pole 500 are spaced apart, and the first adapter 201 is connected to the positive pole 400, and the second adapter 202 is connected to the negative pole 500. The pole assembly can be connected to the battery body 102 through the adapter assembly 200, which is beneficial to the charging and discharging of the battery cell, and can also improve the space utilization of the battery cell, thereby improving the energy density of the battery cell.

[0062] In some embodiments, the battery cell further includes a pressure relief valve 600, the pressure relief valve 600 is connected to the battery housing 101, and the pressure relief valve 600 and the tab structure 1021 are located on adjacent sides of the battery housing 101.

[0063] As Figure 5 shown, in a second aspect, the present application further provides a battery pack, including: a liquid cooling component, including a liquid cooling plate 700 and a liquid cooling pipeline 800, the liquid cooling plate 700 is vertical, the liquid cooling plate 700 is connected to the liquid cooling pipeline 800, and a plurality of the liquid cooling plates 700 are arranged along a first direction; and the battery cells as described above, a plurality of the battery cells are arranged along a second direction to form a battery pack, and a plurality of rows of the battery pack are arranged along the first direction, and the heat conduction component 300 of the battery cell is in contact with the liquid cooling plate 700, wherein the first direction is perpendicular to the second direction.

[0064] Exemplarily, the liquid cooling plate 700 is located in the battery pack bracket and is connected to the liquid cooling pipeline 800 through the inlet and outlet water ports at both ends. Each vertical liquid cooling plate 700 is in a parallel connection state to enhance the heat management effect and achieve the uniformity of heat management inside the battery pack.

[0065] It should be noted that a coolant flow channel is provided inside the liquid cooling plate 700, and a double-sided liquid cooling effect can be achieved. There is no requirement for the internal structure of the liquid cooling plate 700, and it only needs to meet the excellent cooling effect.

[0066] Of course, based on the bottom liquid cooling method commonly used in existing battery packs, the solution of the present application can also be compatible with the bottom liquid cooling solution to further enhance the heat management efficiency. It only needs to set a liquid cooling plate at the bottom of the battery lower housing 1000 of the housing structure, which does not affect the arrangement of the vertical liquid cooling plate 700.

[0067] When both vertical liquid cooling and bottom liquid cooling are available, the vertical liquid cooling plate 700 and the bottom liquid cooling plate are in a parallel state.

[0068] In the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of the present application are not limited thereto.

[0069] In the above implementation process, based on the heat conduction component 300 of the liquid cooling plate 700 and the battery cell, rapid heat conduction can be performed on the side of the battery cell, without occupying the space in the arrangement direction of the battery cell. At the same time, the liquid cooling plate 700 plays a role in heat isolation and electrical isolation between battery packs, avoiding the heat spread of battery cells to adjacent battery packs and the risk of short-circuit arcing during thermal runaway, and improving the heat management efficiency of the battery pack.

[0070] In some embodiments, the battery pack further includes a housing structure, which includes a battery upper cover 900 and a battery lower housing 1000. The battery upper cover 900 is connected to the battery lower housing 1000 to enclose a receiving cavity, which is configured to receive the liquid cooling component and the battery pack.

[0071] Exemplarily, the battery pack is configured with two rows, and the bottoms of the two rows of the battery pack can be adhesively bonded to the battery lower housing 1000 using structural adhesive.

[0072] In the above implementation process, the housing structure is used to accommodate the liquid cooling component and the battery pack. The liquid cooling component does not occupy the space in the arrangement direction of the battery cells, improving the space utilization rate of the housing structure and being beneficial to enhancing the energy density of the battery pack.

[0073] In a third aspect, the present application further provides an electrical device, including the battery pack as described above.

[0074] Exemplarily, the battery pack is used to supply electrical energy to the electrical device, and the electrical device can be a vehicle, a portable device, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc. The embodiments of the present application do not impose special restrictions on the above electrical devices.

[0075] For the convenience of description in the following embodiments, a vehicle is taken as an example of an electrical device according to an embodiment of the present application for illustration.

[0076] A battery pack is disposed inside the vehicle, and the battery pack can be disposed at the bottom, head, or tail of the vehicle. The battery pack can be used for power supply of the vehicle. For example, the battery pack can be used as the operating power source of the vehicle for the vehicle's circuit system, such as for the working power requirements during vehicle startup, navigation, and operation.

[0077] The vehicle may further include a controller and a motor. The controller is used to control the battery pack to supply power to the motor, for example, for the working power requirements during vehicle startup, navigation, and driving.

[0078] In some embodiments of the present application, the battery pack can not only be used as the operating power source of the vehicle but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0079] Since the electrical equipment provided by the third party includes a battery pack, the electrical equipment has all the technical effects of the battery pack, which will not be elaborated here.

[0080] In all embodiments of the present application, "big", "small", "many", "few", "up", and "down" are relative. The embodiments of the present application will not elaborate on the expression methods of such relative terms.

[0081] It should be understood that the "in this embodiment", "in the embodiments of the present application", or "as an optional implementation manner" mentioned throughout the specification means that the specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the "in this embodiment", "in the embodiments of the present application", or "as an optional implementation manner" that appear throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0082] In various embodiments of the present application, it should be understood that the magnitudes of the sequence numbers of the above processes do not necessarily mean the inevitable sequence of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0083] As described above, the above are only the specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery cell, characterized in that, include: A battery assembly, comprising a battery housing and a battery body, wherein the battery housing is configured to accommodate the battery body, and the battery body is configured with a tab structure; A switching assembly is disposed on one side of the battery body and connected to the tab structure; The heat-conducting component is disposed on a side of the adapter component away from the battery body, and the heat-conducting component is attached to the tab structure.

2. The battery cell according to claim 1, wherein The adapter assembly includes a first adapter plate and a second adapter plate, and the tab structure includes a first tab and a second tab, the first adapter plate is located on one side of the battery body, and the first adapter plate is connected to the first tab, and the second adapter plate is located on the other side of the battery body, and the second adapter plate is connected to the second tab.

3. The battery cell according to claim 2, wherein, The first adapter plate is provided with a first through-hole grid, and the first pole tab passes through the first through-hole grid.

4. The battery cell according to claim 2 or 3, characterized in that, The second adapter plate is provided with a second through-hole grid, and the second pole tab is penetrated by the second through-hole grid.

5. The battery cell according to claim 4, wherein The heat-conducting assembly includes a first heat-conducting member and a second heat-conducting member, wherein the first heat-conducting member is attached to the first electrode tab, and the second heat-conducting member is attached to the second electrode tab.

6. The battery cell according to claim 5, wherein The first heat conducting member is provided with a first groove configured to accommodate the first pole tab, and the second heat conducting member is provided with a second groove configured to accommodate the second pole tab.

7. The battery cell according to claim 5, characterized in that, The battery cell further includes a pole assembly, which is disposed at the upper end of the battery housing. The first pole lug is disposed at the left side of the battery housing, and the second pole lug is disposed at the right side of the battery housing.

8. The battery cell according to claim 7, wherein The pole assembly includes a positive pole and a negative pole, the positive pole and the negative pole are spaced apart from each other, the first adapter is connected to the positive pole, and the second adapter is connected to the negative pole.

9. The battery cell according to claim 1, characterized in that, The battery cell further includes a pressure relief valve, which is connected to the battery housing, and the pressure relief valve and the tab structure are located on two adjacent sides of the battery housing.

10. A battery pack, characterized in that, include: A liquid cooling assembly, comprising a liquid cooling plate and a liquid cooling pipeline, wherein the liquid cooling plate is connected to the liquid cooling pipeline, and the liquid cooling plate is provided with a plurality of liquid cooling plates along a first direction; and The battery cell according to any one of claims 1 to 9, wherein the battery cell is configured in plurality, and the plurality of battery cells are arranged along a second direction to form a battery pack, the battery pack is configured in a plurality of rows along the first direction, and the heat conductive components of the battery cells are in contact with the liquid cooling plate, wherein the first direction is perpendicular to the second direction.

11. The battery pack according to claim 10, characterized in that, The battery pack also includes a shell structure, which includes a battery upper cover and a battery lower shell. The battery upper cover is connected to the battery lower shell to enclose a accommodating cavity, and the accommodating cavity is configured to accommodate the liquid cooling assembly and the battery pack.

12. An electrical device, characterized in that, Comprising a battery pack as described in any one of claims 10-11.

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