Batteries and power-consuming devices

Abstract

The battery (10) and the power consuming device (1) are: the battery (10) includes a thermally conductive member (40) and a battery assembly (20), the thermally conductive member (40) is arranged along a first direction, the first direction being the longitudinal direction of the battery (10) or the running direction of the power consuming device (1) having the battery (10), the battery assembly (20) includes at least one battery cell (21), the battery assembly (20) is arranged along the first direction, the battery cell (21) includes a plurality of surfaces, the plurality of surfaces including a first surface (2111) having a maximum area, and the battery cell (21) is thermally conductively connected to the thermally conductive member (40) via at least the first surface (2111).

Description

[Technical field]

[0001] This application relates to the field of battery technology, and in particular to batteries and power consuming devices. [Background technology]

[0002] In recent years, with the development of the economy, battery technology has been widely applied in various fields, especially in the field of new energy vehicles. At present, new energy vehicles have already made a great impact on traditional fuel oil vehicles. As a core component of new energy vehicles, batteries play a vital role in the development process of new energy vehicles.

[0003] During the operation of the battery, a certain amount of heat is generated, so that in order to prevent the battery from excessively increasing in temperature, the battery is generally provided with a thermal conductive member for heat exchange with the battery core in the battery. Here, the thermal conductive member is generally installed to extend along the width direction of the vehicle, so that both ends of the thermal conductive member are located on both sides of the width direction of the vehicle. When the vehicle crashes along the lateral direction, the thermal conductive member is easily damaged, which affects the safety of the battery. Summary of the Invention

[0004] In view of the shortcomings existing in the prior art, the objective of the present application is to provide a battery and a power consuming device that can effectively solve the safety problem when a vehicle is impacted along the lateral direction.

[0005] A first aspect of the present application discloses a battery, the battery comprising: a heat conductive member disposed along a first direction that is a longitudinal direction of the battery or a travel direction of a power consuming device having the battery; a battery assembly including at least one battery cell and disposed along a first direction; The battery cell includes a plurality of surfaces, the plurality of surfaces including a first surface having a largest area, and the battery cell is thermally conductively connected to the thermally conductive member via at least the first surface.

[0006] In the battery according to the present application, the thermal conductive member is installed along a first direction, and the first direction is the longitudinal direction of the battery or the running direction of the power consuming device having the battery, i.e., both ends of the thermal conductive member are respectively provided at both ends in the longitudinal direction of the battery or at both ends in the running direction of the power consuming device, so that when the power consuming device collides along the lateral direction, the impact force does not act directly on the ends of the thermal conductive member, thereby preventing damage to the thermal conductive member and ensuring the safety and reliability of the use of the battery, and the battery cells are thermally connected to the thermal conductive member through the first surface, thereby improving the heat exchange effect of the thermal conductive member on the battery cells.

[0007] In some embodiments of the present application, the first surface intersects with a horizontal plane, the first surface being the surface that maximizes the battery cell area, and intersecting the first surface with the horizontal plane can increase the overall energy density of the battery by maximizing the number of battery cells placed within the horizontal plane.

[0008] In some embodiments of the present application, the battery cell includes at least two battery assemblies, and both sides of the thermally conductive member are thermally conductively connected to the two battery assemblies along the second direction, and both the second direction and the first direction cross the first surface. By thermally conductively connecting both sides of the thermally conductive member to the first surfaces of the battery cells, the thermally conductive member can improve the heat exchange effect with the battery cells.

[0009] In some embodiments of the present application, the battery includes at least two battery assemblies arranged along a second direction and at least one thermally conductive member, a first surface of each battery cell of each battery assembly is thermally conductively connected to a thermally conductive member, and the second direction and the first direction both intersect with the first surface. By thermally conductively connecting a first surface of each battery cell to the thermally conductive member, the battery cells can be effectively heat exchanged, and the number of thermally conductive members installed can be reduced, thereby reducing the weight of the battery and the cost of the battery.

[0010] In some embodiments of the present application, the length of the battery is parallel to or transverse to the direction of travel of the power consuming device. The battery in the present application may be mounted in the device along either direction to facilitate installation of the battery.

[0011] In some embodiments of the present application, a heat exchange medium passage is provided in the heat conductive member, which is used for the flow of a heat exchange medium, so that the flow of the heat exchange medium can carry away the heat released by the battery cells or heat the feeder battery cells, and further improve the heat exchange efficiency of the battery cells.

[0012] In some embodiments of the present application, the battery includes a plurality of thermally conductive members, the plurality of thermally conductive members are aligned along a second direction, and the second direction and the first direction both intersect with the first surface. By aligning the plurality of thermally conductive members along the second direction and jointly using them to exchange heat with the battery, the heat exchange rate for the battery is effectively increased.

[0013] In some embodiments of the present application, a heat conductive member is provided on each side of the battery assembly along the second direction, and the battery assembly is thermally conductively connected to the heat conductive members on both sides. Both sides of the battery assembly are thermally conductively connected to the heat conductive members at the same time, and the heat exchange speed for the battery is effectively improved by simultaneously exchanging heat with both sides of the battery assembly.

[0014] In some embodiments of the present application, along the second direction, the battery cell includes two opposing first surfaces, and the two first surfaces of the battery cell are thermally conductively connected to one thermal conductive member respectively. When the battery cell has two first surfaces with the largest areas, the two first surfaces are simultaneously heat-exchanged, thereby effectively improving the heat exchange rate for the battery.

[0015] In some embodiments of the present application, the battery cell includes an electrode assembly, the electrode assembly includes a body and a tab protruding from the body, the tab is electrically connected to the electrode terminal, the projections of the thermally conductive member and the body along the second direction at least partially overlap and have an overlapping area, and the second direction and the first direction both intersect with the first surface. By arranging the thermally conductive member and the body to be at least partially overlapped along the second direction, the body can be effectively heat-exchanged through the thermally conductive member, thereby improving the heat exchange effect for the battery cell.

[0016] In some embodiments of the present application, the size of the body along the third direction is L1, and the size of the heat conducting member is L2, where 0.5≦L2 / L1≦1.5, and the first direction, the second direction, and the third direction intersect each other two by two. The L2 / L1 ratio is set in a range greater than 0.5 and less than 1.5 to ensure that the heat conducting member has a sufficient heat conducting area, thereby exchanging heat with the body, and greatly enhancing the heat exchanging effect of the heat conducting member on the body.

[0017] In some embodiments of the present application, the size of the overlapping region along the third direction is L3, and 0.5≦L3 / L1≦1. By setting the size of the overlapping region in the third direction, the heat exchange area between the heat conducting member and the main body can be set reasonably, and the heat exchange effect of the heat conducting member with the main body can be greatly enhanced.

[0018] In some embodiments of the present application, the battery further includes a current collecting member, the current collecting member in fluid communication with the heat exchange medium passages within the plurality of thermally conductive members; Here, a current collecting member is provided at one end of the heat conducting member located in a first direction, or current collecting members are provided at both ends of the heat conducting member located in the first direction, respectively. The current collecting member is used to supply or recover the heat exchange medium in the heat exchange medium passage, thereby to exchange heat with the battery, and by providing the current collecting member at the end of the heat conducting member in the first direction, when the power consuming device collides along the lateral direction, the impact force does not directly act on the end of the heat conducting member, thereby preventing damage to the heat conducting member and ensuring the safety and reliability of the use of the battery.

[0019] In some embodiments of the present application, there are two current collecting members, the two current collecting members are disposed at one end of the heat conducting member located in a first direction, the two current collecting members are arranged along a third direction, and the first direction, the second direction, and the third direction cross each other two by two. By disposing the two current collecting members together at one end of the first direction and arranging them along the third direction, the space occupied by the current collecting members in the battery along the first direction can be effectively reduced, so that it is easy to dispose other structures in the battery and improve the energy density of the battery; by disposing the two current collecting members together at one end of the first direction, the probability of the current collecting members being damaged when facing a collision in the first direction can be further reduced.

[0020] In some embodiments of the present application, the battery cell includes two second surfaces, the two second surfaces are arranged opposite to each other along the second direction or the third direction, the first direction, the second direction, and the third direction intersect two by two, the battery cell includes electrode terminals, the electrode terminals are provided on the second surfaces, and the surface area of ​​the second surfaces is smaller than the surface area of ​​the first surfaces. The electrode terminals are provided on the second surfaces, and power is supplied to a power consuming device via the electrode terminals on the second surfaces.

[0021] In some embodiments of the present application, the electrode terminal includes two electrode terminals with opposite polarities, and the two electrode terminals are provided on one second surface, or the two electrode terminals are provided on two second surfaces, respectively. The two electrode terminals with opposite polarities may be provided on the same second surface of the battery cell as required, or may be provided on two second surfaces, respectively, and the electrode terminals escape the first surface that exchanges heat with the thermal conductive member, and are then easily electrically connected to other adjacent battery cells.

[0022] In some embodiments of the present application, the battery cell includes an electrode terminal, and the electrode terminal is provided on a first surface. The electrode terminal is provided on the first surface, and power is supplied to a power consuming device through the electrode terminal on the first surface. By providing the electrode terminal on the first surface, the space of the battery occupied by the electrode terminal in the first direction or the third direction can be saved, and the energy density of the battery can be further increased.

[0023] In some embodiments of the present application, the battery cell includes a first surface and a fourth surface disposed opposite to the first surface, the first surface and the fourth surface disposed opposite to each other along a second direction, the second direction and the first direction both intersect with the first surface, and a recess is provided on an edge of the fourth surface, the first surface is used for mounting an electrode terminal, the electrode terminal is disposed protruding from the first surface in the second direction and corresponds to the recess. By providing the electrode terminal on the first surface and providing a recess corresponding to the electrode terminal on the edge of the fourth surface, the recess can accommodate the electrode terminal of an adjacent battery cell, and an operating space for electrical connection can be left, so that the overall structure of the battery is more compact and the space utilization rate is increased.

[0024] In some embodiments of the present application, the battery cell further includes a pressure relief mechanism, and the electrode terminal is at least one, and the pressure relief mechanism and the at least one electrode terminal are provided on the same second surface, or the pressure relief mechanism and the electrode terminal are provided on two second surfaces, respectively. The pressure relief mechanism communicates with the inside of the battery cell and is used to release the internal pressure of the battery cell when the internal pressure of the battery cell becomes large. The pressure relief mechanism may be provided on the same second surface as the electrode terminal, or may be provided on two second surfaces, respectively, as necessary, so that the pressure relief mechanism can escape the first surface that exchanges heat with the thermal conductive member, and the pressure relief mechanism can facilitate smooth exhaust when thermal runaway occurs in the battery cell.

[0025] In some embodiments of the present application, the battery cell further includes a pressure relief mechanism and two third surfaces disposed opposite to each other, and the pressure relief mechanism is provided on at least one of the third surfaces. By providing the pressure relief mechanism on the third surface and the electrode terminal on the second surface, the pressure relief mechanism and the electrode terminal are separated, and it is easy to reduce the risk that the exhaust of the pressure relief mechanism will affect the electrode terminal when thermal runaway occurs in the battery cell.

[0026] In some embodiments of the present application, the battery cell further includes a pressure relief mechanism, and the pressure relief mechanism is provided on the first surface. By providing the pressure relief mechanism on the first surface, it is easy to attach the battery cell.

[0027] In some embodiments of the present application, the battery cell includes an electrode assembly, the electrode assembly has a wound structure and is flat, an outer surface of the electrode assembly includes two flat surfaces, and the two flat surfaces face each other along a second direction; or the electrode assembly has a stacked structure, and a first electrode plate, a separator and a second electrode plate of the electrode assembly are stacked along the second direction; The second direction and the first direction both intersect the first surface. By arranging the electrode assembly in a stacked or wound configuration, either can effectively deliver power to a power consuming device through the electrode assembly.

[0028] In some embodiments of the present application, the battery assembly includes at least two battery cells, and the at least two battery cells are aligned along a first direction. When the at least two battery cells are aligned along the first direction and the battery cells need to be heat-exchanged, a heat-conducting member can be installed along the first direction, thereby facilitating the heat exchange of the at least two battery cells in the battery assembly respectively, thereby improving the heat exchange speed of the heat-conducting member.

[0029] In some embodiments of the present application, the maximum size of the battery cell along the first direction is L, and the maximum size of the battery cell along the second direction is D, where the L / D ratio ranges from 1 to 30. By installing the battery cells according to the above size ratio, the power amount of the battery cells can be maximized while ensuring the supporting strength of the battery cells.

[0030] In some embodiments of the present application, the maximum size of the battery cells along the third direction is H, the L / H ratio ranges from 0.5 to 6, and the first direction, the second direction, and the third direction intersect two by two. By installing the battery cells according to the above size ratio, the battery cell support strength can be guaranteed and the power capacity of the battery cells can be maximized.

[0031] In some embodiments of the present application, the electrode terminal is provided on one of the second surfaces, the battery includes a support plate, the battery cell is fixedly connected to the support plate via another second surface on which the electrode terminal is not provided, and both the second surface and the first direction intersect with the horizontal plane. By fixing the battery cell in the housing via the support plate, it is easy to attach and fix the battery cell.

[0032] In some embodiments of the present application, the second surface is fixedly connected to the support plate via a first adhesive layer, and the thermal conductive member is thermally conductively connected to the first surface via a second adhesive layer, and the thermal conductivity coefficient of the first adhesive layer is equal to or less than the thermal conductivity coefficient of the second adhesive layer. Since the first adhesive layer is used to connect the second surface to the support plate and the second adhesive layer is used to thermally conductively connect the first surface to the thermal conductive member, the thermal conductivity coefficient of the first adhesive layer is set to be equal to or less than the thermal conductivity coefficient of the second adhesive layer to ensure more effective heat exchange between the battery cells via the thermal conductive member.

[0033] In some embodiments of the present application, the ratio of the thermal conductivity coefficient of the first adhesive layer to the thermal conductivity coefficient of the second adhesive layer is in the range of 0.1 to 1. When installed according to the above ratio, both can effectively exchange heat with the battery cells via the thermally conductive member.

[0034] A second aspect of the present application further provides a power consumer device, comprising the battery according to any one of the above claims, the battery being used to provide electrical energy to drive the power consumer device to run.

[0035] In some embodiments of the present application, when the longitudinal direction of the battery is different from the running direction of the power consuming device, the first direction is the running direction of the power consuming device. By setting the first direction as the running direction of the power consuming device, when the battery cells need to be heat exchanged, the thermal conductive member can be installed along the first direction, so as to facilitate the heat exchange of the battery cells in the battery assembly, the thermal conductive member is installed along the first direction, and the first direction is the running direction of the power consuming device having the battery, i.e., both ends of the thermal conductive member are respectively provided at both ends in the running direction of the power consuming device, so that when the power consuming device collides along the lateral direction, the impact force does not directly act on the ends of the thermal conductive member, thereby preventing the damage of the thermal conductive member and ensuring the safety and reliability of the use of the battery.

[0036] The above description is only an outline of the technical solution of the present application, which can be implemented in accordance with the contents of the specification, in order to make the technical means of the present application more clearly known, and to make the above and other objectives, features and advantages of the present application more clearly understandable, the following particularly cites specific embodiments of the present application for description. [Brief description of the drawings]

[0037] [Figure 1] 1 is a structural schematic diagram of a vehicle according to an embodiment of the present application; [Diagram 2] FIG. 2 is an exploded structural schematic diagram of a battery according to an embodiment of the present application. [Diagram 3] FIG. 2 is a structural schematic diagram of a battery assembly according to an embodiment of the present application. [Figure 4] FIG. 2 is a structural schematic diagram of a battery cell according to an embodiment of the present application. [Diagram 5] FIG. 2 is an exploded structural schematic diagram of a battery cell according to an embodiment of the present application. [Figure 6] FIG. 2 is a structural schematic diagram of a battery cell according to an embodiment of the present application. [Figure 7] FIG. 2 is a structural schematic diagram of a battery cell according to an embodiment of the present application. [Figure 8] FIG. 2 is a structural schematic diagram of a battery cell according to an embodiment of the present application. [Figure 9] FIG. 1 is a structural schematic diagram of a battery according to an embodiment of the present application. [Figure 10] FIG. 2 is an exploded structural schematic diagram of a battery according to an embodiment of the present application. [Figure 11] FIG. 2 is a structural schematic diagram of a battery assembly according to an embodiment of the present application. [Figure 12] FIG. 2 is a structural schematic diagram of a battery assembly according to an embodiment of the present application. [Figure 13] FIG. 2 is a structural schematic diagram of a battery assembly according to an embodiment of the present application. [Figure 14] FIG. 2 is a structural schematic diagram of a battery cell according to an embodiment of the present application. [Figure 15] FIG. 2 is a structural schematic diagram of a battery assembly according to an embodiment of the present application. [Figure 16] FIG. 2 is a structural schematic diagram of a battery cell according to an embodiment of the present application. [Figure 17] FIG. 2 is a structural schematic diagram of a battery cell according to an embodiment of the present application. [Figure 18] FIG. 2 is a structural schematic diagram of a battery assembly according to an embodiment of the present application. [Figure 19] FIG. 2 is a structural schematic diagram of a battery assembly according to an embodiment of the present application. [Figure 20] FIG. 2 is a structural schematic diagram of a battery cell according to an embodiment of the present application. [Figure 21] FIG. 2 is a structural schematic diagram of a heat-conducting member according to an embodiment of the present application. [Figure 22] FIG. 2 is a structural schematic diagram of a second portion according to an embodiment of the present application. [Figure 23] FIG. 2 is an assembly structure schematic diagram of a second section and a battery assembly according to an embodiment of the present application. [Figure 24] FIG. 2 is an enlarged structural schematic diagram of part A according to one embodiment of the present application. [Diagram 25] FIG. 1 is a structural schematic diagram of cross section BB according to an embodiment of the present application. [Figure 26] FIG. 2 is an enlarged structural schematic diagram of part C according to an embodiment of the present application. [Figure 27] FIG. 2 is a schematic diagram of the internal structure of the second portion according to an embodiment of the present application. [Figure 28] FIG. 2 is an enlarged structural schematic diagram of part D according to an embodiment of the present application. [Figure 29] FIG. 2 is a schematic diagram of a battery distribution structure in a power consumption device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] The following describes in detail the embodiments of the technical solution of the present application in conjunction with the drawings. The following embodiments are merely examples, and are not intended to limit the scope of protection of the present application.

[0039] It should be noted that unless otherwise specified, technical or scientific terms used in the embodiments of the present application should have the common meaning as understood by those skilled in the art to which the embodiments of the present application belong.

[0040] In describing the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," "circumferential direction," and the like are orientations or positional relationships shown based on the drawings, and are intended merely to describe and simplify the embodiments of the present application, and do not indicate or imply that the referred devices or elements must have a specific orientation or be configured and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0041] It should be noted that the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying a relative importance or implying the number of technical features being indicated. In the description of the embodiments of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically limited.

[0042] In the description of the embodiments of the present application, unless otherwise clearly defined or limited, the technical terms "attached," "connected," "connected," "fixed," and the like should be understood in a broad sense, and may refer to, for example, a fixed connection, a removable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application according to the specific circumstances.

[0043] In the description of the embodiments of the present application, unless otherwise clearly defined or limited, a first feature being "above" or "below" a second feature may mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature via an intermediate medium. And, a first feature being "above", "above" and "on the upper surface" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or may simply indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below", "below" and "on the lower surface" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0044] At present, in view of the development of the market situation, the application of power batteries is becoming more and more widespread. Power batteries are widely used in energy storage power systems such as hydroelectric, thermal, wind and solar power stations, as well as in electric transportation tools such as electric bicycles, electric motorcycles, electric cars, and military equipment and aerospace. Lithium-ion batteries have the advantages of high energy density, high average open circuit voltage, long cycle life, etc., and have been widely used in mobile and portable devices.

[0045] The inventor of the present application found that the heat conducting member inside the power battery of a vehicle is generally installed along the width direction of the vehicle, so that both ends of the heat conducting member are respectively on both sides of the width direction of the vehicle, when the vehicle is hit along the lateral direction, i.e. when the vehicle is hit along the direction in which the vehicle is installed at an angle to the running direction, both ends of the heat conducting member are easily damaged under the action of the impact force, which will cause the heat conducting member to be damaged, affecting the normal use of the battery and even creating a safety hazard.

[0046] In order to solve the problem of damage to the thermal conductive member when a vehicle is hit in a lateral direction, the inventor of the present application has found through research that the thermal conductive member is installed in the longitudinal direction of the battery or in the running direction of the power consuming device having the battery by installing the battery assembly in the longitudinal direction of the battery or in the running direction of the power consuming device having the battery, i.e., both ends of the thermal conductive member are provided at both ends of the longitudinal direction of the battery or at both ends of the running direction of the power consuming device, respectively, so that when the power consuming device is hit in a lateral direction, the impact force does not directly act on the ends of the thermal conductive member, thereby preventing the thermal conductive member from being damaged and ensuring the safety and reliability of the use of the battery.

[0047] Based on the above idea, the inventor of the present application has conducted in-depth research and designed a battery, the battery including a battery assembly, the battery assembly including at least one battery cell, the battery assembly being installed along a first direction, the first direction being a longitudinal direction of the battery or a traveling direction of a power consuming device having the battery, the battery cell including a plurality of surfaces, the plurality of surfaces including a first surface having a maximum area, the plurality of surfaces further including two second surfaces installed oppositely along a second direction, the second direction intersecting the first direction, the battery cell further including an electrode terminal, the electrode terminal being provided on the first surface or at least one of the second surfaces.

[0048] In the battery according to the present application, the battery assembly is installed along a first direction, i.e., the battery cells in the battery assembly are installed along a first direction, and when the battery cells need to be heat exchanged, the thermal conductive member can be installed along the first direction, thereby facilitating heat exchange between the battery cells in the battery assembly; the thermal conductive member is installed along the first direction, and the first direction is the longitudinal direction of the battery or the running direction of the power consuming device having the battery, i.e., both ends of the thermal conductive member are respectively provided at both ends in the longitudinal direction of the battery or at both ends in the running direction of the power consuming device, so that when the power consuming device collides along the lateral direction, the impact force does not directly act on the ends of the thermal conductive member, thereby preventing damage to the thermal conductive member and ensuring the safety and reliability of the use of the battery.

[0049] The present application provides a battery and a power consumption device having the battery, and the battery can be applied to various power consumption devices that use batteries, such as mobile phones, portable devices, laptops, battery-powered vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, for example, spacecraft including airplanes, rockets, space shuttles and spacecraft, and the like, and the battery is used to provide electrical energy to the power consumption devices.

[0050] It should be understood that the technical solutions described in the embodiments of the present application are not limited to application to the batteries and power consumption devices described above, but may be applied to all batteries and power consumption devices that use batteries, including housings. However, for the sake of brevity, the following embodiments will be described using an electric vehicle as an example.

[0051] FIG. 1 is a structural schematic diagram of a vehicle 1 according to some embodiments of the present application. FIG. 2 is an exploded structural schematic diagram of a battery 10 according to an embodiment of the present application. FIG. 3 is a structural schematic diagram of a battery assembly 20 according to an embodiment of the present application. As shown in FIGS. 1 to 3, the vehicle 1 may be a fuel oil vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range extender vehicle, etc. A battery 10 is installed inside the vehicle 1, and the battery 10 may be installed at the bottom, head, or tail of the vehicle 1. The battery 10 may be used to power the vehicle 1, for example, the battery 10 may be used as an operating power source for the vehicle 1. The vehicle 1 may further include a controller 11 and a motor 12, and the controller 11 is used to control the battery 10 to power the motor 12, for example, for the startup, navigation, and operating power consumption needs during driving of the vehicle 1.

[0052] In some embodiments of the present application, the battery 10 can provide not only the operating power source for the vehicle 1, but also the propulsion power source for the vehicle 1, in place of or in place of fuel oil or natural gas to provide propulsion power to the vehicle 1.

[0053] In order to meet different power demands, the battery 10 may include multiple battery cells 21, and the battery cell 21 is the smallest unit constituting a battery assembly 20 or a battery pack. The multiple battery cells 21 are connected in series and / or in parallel at their electrode terminals to be used in various application situations. The battery 10 referred to in this application is a battery pack. Here, the multiple battery cells 21 may be connected in series, in parallel, or in series-parallel, and the series-parallel connection is a mixture of the series and parallel connections. In the embodiment of the present application, the multiple battery cells 21 may directly constitute a battery pack, or may be first constituted as a battery assembly 20, and then the battery assembly 20 may be used to constitute a battery pack.

[0054] As shown in FIG. 2 and FIG. 3, the battery 10 may include a plurality of battery assemblies 20 and a housing 30, and the plurality of battery assemblies 20 are housed inside the housing 30. In order to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 21, the housing 30 is used to house the battery cells 21 or the battery assemblies 20. The housing 30 may be a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure combining simple three-dimensional structures such as a rectangular parallelepiped, cylinder, or sphere, and the embodiment of the present application is not limited thereto. The material of the housing 30 may be an alloy material such as an aluminum alloy or an iron alloy, a polymer material such as a polycarbonate or a polyisocyanurate foam plastic, or a composite material such as a glass fiber and an epoxy resin, and the embodiment of the present application is not limited thereto.

[0055] In some embodiments, the housing 30 may include a first portion 31 and a second portion 32, the first portion 31 and the second portion 32 being fitted over each other, and the first portion 31 and the second portion 32 jointly defining a space for accommodating the battery cells 21. The second portion 32 may be a hollow structure with one end open, the first portion 31 may be a plate-like structure, and the first portion 31 is fitted over the open side of the second portion 32, so that the first portion 31 and the second portion 32 jointly define a space for accommodating the battery cells 21, and both the first portion 31 and the second portion 32 may be hollow structures with one end open, and the open side of the first portion 31 is fitted over the open side of the second portion 32.

[0056] The battery assembly 20 may include a plurality of battery cells 21, and the plurality of battery cells 21 may be connected in series, parallel, or series-parallel to form the battery assembly 20, and the plurality of battery assemblies 20 may be connected in series, parallel, or series-parallel to form the battery 10. The battery cells 21 may have a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, and the embodiments of the present application are not limited thereto. The battery cells 21 generally include a cylindrical battery core, a rectangular housing battery core, a pouch battery core, and a polygonal columnar cross-section battery core, and the embodiments of the present application are not limited thereto. However, for the sake of simplicity, the following embodiments will be described using a rectangular parallelepiped lithium ion battery cell 21 as an example.

[0057] FIG. 4 is a structural schematic diagram of a battery cell 21 according to an embodiment of the present application, and FIG. 5 is an exploded structural schematic diagram of a battery cell 21 according to an embodiment of the present application. FIG. 6 is a structural schematic diagram of a battery cell according to an embodiment of the present application. FIG. 7 is a structural schematic diagram of a battery cell according to an embodiment of the present application. FIG. 8 is a structural schematic diagram of a battery cell according to an embodiment of the present application. The battery cell 21 is the smallest unit constituting the battery 10. As shown in FIGS. 4 to 8, the battery cell 21 includes an end cap 212, a case 211, and an electrode assembly 213.

[0058] The end cap 212 refers to a member that is placed over the opening of the case 211 to isolate the internal environment of the battery cell 21 from the external environment. The shape of the end cap 212 may be adapted to the shape of the case 211 so as to fit the case 211, but is not limited thereto. Alternatively, the end cap 212 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, and thus the end cap 212 is less likely to be deformed when pressed or hit, and the battery cell 21 can have higher structural strength and improve safety performance. The end cap 212 may be provided with a functional member such as an electrode terminal 214. The electrode terminal 214 may be used to electrically connect to the electrode assembly 213 in order to input and output electrical energy of the battery cell 21. In some embodiments, the end cap 212 may further be provided with a pressure relief mechanism that releases internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value. In some embodiments, an insulating member may be further installed inside end cap 212, which may be used to isolate electrical connections in case 211 from end cap 212 to reduce the risk of short circuit. Illustratively, the insulating member may be plastic, rubber, etc.

[0059] The case 211 is an assembly for forming an internal environment of the battery cell 21 together with the end cap 212, and the formed internal environment may be used to accommodate the electrode assembly 213, an electrolyte (not shown), and other components. The case 211 and the end cap 212 may be independent components, or an opening may be provided in the case 211, and the end cap 212 is placed over the opening to form the internal environment of the battery cell 21. The end cap 212 and the case 211 may be integrated, but are not limited thereto. Specifically, the end cap 212 and the case 211 may form a common connection surface before other components enter the case, and the end cap 212 is placed over the case 211 when the inside of the case 211 needs to be packaged. The case 211 may have various shapes and sizes, such as a rectangular parallelepiped, a cylindrical body, a hexagonal prism, etc. Specifically, the shape of the case 211 may be determined according to the specific shape and size of the electrode assembly 213. The material of the case 211 may be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application is not particularly limited thereto.

[0060] The electrode assembly 213 is a component in which an electrochemical reaction occurs in the battery cell 21. One or more electrode assemblies 213 may be included in the case 211. The electrode assembly 213 is mainly formed by winding or stacking a positive electrode plate and a negative electrode plate, and a separator is generally provided between the positive electrode plate and the negative electrode plate. The parts of the positive electrode plate and the negative electrode plate having active material constitute the main body of the electrode assembly 213, and the parts of the positive electrode plate and the negative electrode plate not having active material constitute tabs (not shown). The positive electrode tab and the negative electrode tab may both be located at one end of the main body, or may be located at both ends of the main body. In the charging and discharging process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminals 214 to form a current circuit.

[0061] Fig. 9 is a structural schematic diagram of a battery 10 according to an embodiment of the present application, Fig. 10 is an exploded structural schematic diagram of a battery 10 according to an embodiment of the present application, and Fig. 11 is a structural schematic diagram of a battery assembly 20 according to an embodiment of the present application. As shown in Figs. 1, 4 to 11, in some embodiments of the present application, the battery 10 includes a thermally conductive member 40 and a battery assembly 20, the thermally conductive member 40 is installed along a first direction, the first direction is the longitudinal direction of the battery 10 or the running direction of the power consumption device 1 having the battery 10, the battery assembly 20 includes at least one battery cell 21, the battery assembly 20 is installed along the first direction, the battery cell 21 includes a plurality of surfaces, the plurality of surfaces includes a first surface 2111 having a maximum area, and the battery cell 21 is thermally conductively connected to the thermally conductive member 40 through at least the first surface 2111.

[0062] Specifically, as shown in FIG. 1, FIG. 4, FIG. 10 and FIG. 11, in some embodiments of the present application, the battery cell 21 may be a rectangular housing-shaped battery cell 21, and the battery cell 21 includes two first surfaces 2111 arranged opposite to each other along a second direction. The heat conducting member 40 may be thermally connected to the battery cell 21 through the first surface 2111, and realizes heat exchange with the battery cell 21 by conducting heat of the battery cell 21 onto the heat conducting member 40. Here, the heat exchange with the battery cell 21 includes cooling and dissipating heat to the battery cell 21 or heating to the battery cell 21. The heat conducting member 40 may adopt a heat conducting plate, a heat conducting adhesive or other heat conducting structure, and in some embodiments, a cavity may be further arranged inside the heat conducting member 40. In some embodiments of the present application, the heat conducting member 40 is arranged along the first direction and attached to the first surface 2111, where the heat conducting member 40 is a heat conducting plate. The thermally conductive plate may be a metal plate, such as a copper plate, an aluminum plate, or other material with a relatively good thermal conductivity coefficient ratio. The first direction is the longitudinal direction of the battery 10 or the running direction of the power consuming device 1, and the second direction is the width direction of the battery 10 or the lateral direction of the power consuming device 1.

[0063] Fig. 12 is a structural schematic diagram of a battery assembly 20 according to an embodiment of the present application. As shown in Figs. 1, 4, 10 and 12, in some embodiments of the present application, the battery cell 21 may be a rectangular housing-shaped battery cell 21, and the battery cell 21 includes two first surfaces 2111 arranged opposite to each other along a second direction, and the thermally conductive member 40 is thermally connected to the first surfaces 2111. Here, the first direction is the longitudinal direction of the battery 10 or the running direction of the power consuming device 1, and the second direction is the vertical direction.

[0064] Fig. 13 is a structural schematic diagram of a battery assembly 20 according to an embodiment of the present application. Fig. 14 is a structural schematic diagram of a battery cell 21 according to an embodiment of the present application. As shown in Figs. 1, 10, 13 and 14, in some embodiments of the present application, the battery cell 21 may be a cylindrical battery cell 21, and the battery cell 21 includes a cylindrical first surface 2111, and the thermally conductive member 40 is thermally connected to the first surface 2111. Here, the first direction is the longitudinal direction of the battery 10 or the running direction of the power consuming device 1, and the second direction is the width direction of the battery 10 or the lateral direction of the power consuming device 1.

[0065] Fig. 15 is a structural schematic diagram of a battery assembly according to an embodiment of the present application, Fig. 16 is a structural schematic diagram of a battery cell according to an embodiment of the present application, and Fig. 17 is a structural schematic diagram of a battery cell according to an embodiment of the present application. As shown in Figs. 1, 10, 15 to 17, in some embodiments of the present application, the battery cell 21 may be a rectangular housing-shaped battery cell 21, and the battery cell 21 includes two first surfaces 2111 arranged opposite to each other along a second direction, and the thermally conductive member 40 is thermally connected to the first surfaces 2111. Here, the first direction is the longitudinal direction of the battery 10 or the running direction of the power consuming device 1, and the second direction is the width direction of the battery 10 or the lateral direction of the power consuming device 1.

[0066] Fig. 18 is a structural schematic diagram of a battery assembly according to an embodiment of the present application. As shown in Figs. 1, 10, 16 and 18, in some embodiments of the present application, the battery cell 21 may be a rectangular housing-shaped battery cell 21, and the battery cell 21 includes two first surfaces 2111 arranged opposite to each other along a second direction, and the thermally conductive member 40 is thermally connected to the first surfaces 2111. Here, the first direction is the longitudinal direction of the battery 10 or the running direction of the power consuming device 1, and the second direction is the vertical direction.

[0067] Fig. 19 is a structural schematic diagram of a battery assembly according to an embodiment of the present application, and Fig. 20 is a structural schematic diagram of a battery cell according to an embodiment of the present application. As shown in Figs. 1, 10, 19 and 20, the battery cell 21 may be a rectangular housing-shaped battery cell 21, and the battery cell 21 includes two first surfaces 2111 arranged opposite to each other along a second direction, and the thermally conductive member 40 is thermally connected to the first surfaces 2111. Here, the first direction is the longitudinal direction of the battery 10 or the running direction of the power consuming device 1, and the second direction is the width direction of the battery 10 or the lateral direction of the power consuming device 1.

[0068] In the battery 10 according to the present application, the thermal conductive member 40 is installed along a first direction, and the first direction is the longitudinal direction of the battery 10 or the running direction of the power consuming device 1 having the battery 10, i.e., both ends of the thermal conductive member 40 are provided at both ends in the longitudinal direction of the battery 10 or at both ends in the running direction of the power consuming device 1, respectively. When the power consuming device 1 collides along the lateral direction, the impact force does not act directly on the ends of the thermal conductive member 40, thereby preventing damage to the thermal conductive member 40 and ensuring the safety and reliability of the use of the battery 10; and the battery cells 21 are thermally connected to the thermal conductive member 40 via the first surface 2111, thereby improving the heat exchange effect of the thermal conductive member 40 on the battery cells 21.

[0069] As shown in Figures 4 and 11, in some embodiments of the present application, the first surface 2111 intersects with a horizontal plane.

[0070] Specifically, in some embodiments of the present application, the first surface 2111 may be disposed along a vertical direction.

[0071] As shown in Figures 13 and 14, in some embodiments of the present application, the first surface 2111 intersects with a horizontal plane.

[0072] As shown in Figures 15 and 16, in some embodiments of the present application, the first surface 2111 intersects with a horizontal plane.

[0073] As shown in Figures 19 and 20, in some embodiments of the present application, the first surface 2111 intersects with a horizontal plane.

[0074] Since the first surface 2111 is the surface on which the area of ​​the battery cells 21 is maximum, intersecting the first surface 2111 with a horizontal plane can maximize the number of battery cells 21 arranged within the horizontal plane, thereby increasing the overall energy density of the battery 10.

[0075] Fig. 21 is a structural schematic diagram of the heat conduction member 40 according to an embodiment of the present application, Fig. 22 is a structural schematic diagram of the second part 32 according to an embodiment of the present application, Fig. 23 is an assembled structural schematic diagram of the second part 32 and the battery assembly 20 according to an embodiment of the present application, and Fig. 24 is an enlarged structural schematic diagram of part A according to an embodiment of the present application. As shown in Figs. 4, 11, 21, 22, 23 and 24, in some embodiments of the present application, the battery 10 includes at least two battery assemblies 20, and both sides of the heat conduction member 40 are thermally connected to the two battery assemblies 20 respectively along the second direction, and the second direction and the first direction both intersect with the first surface 2111.

[0076] Specifically, the thermally conductive member 40 is provided between the two battery assemblies 20 and is thermally conductively connected to each of the two battery assemblies 20. Here, the second direction is the width direction of the battery 10 or a lateral direction to the traveling direction of the power consuming device 1.

[0077] As shown in Figures 13, 14, 21, 22, 23 and 24, in some embodiments of the present application, the battery 10 includes at least two battery assemblies 20, and along the second direction, both sides of the thermally conductive member 40 are thermally conductively connected to the two battery assemblies 20 respectively, and the second direction and the first direction both intersect with the first surface 2111.

[0078] As shown in Figures 15, 16, 21, 22, 23 and 24, in some embodiments of the present application, the battery 10 includes at least two battery assemblies 20, and along the second direction, both sides of the thermally conductive member 40 are thermally conductively connected to the two battery assemblies 20 respectively, and the second direction and the first direction both intersect with the first surface 2111.

[0079] As shown in Figures 19, 20, 21, 22, 23 and 24, in some embodiments of the present application, the battery 10 includes at least two battery assemblies 20, and along the second direction, both sides of the thermally conductive member 40 are thermally conductively connected to the two battery assemblies 20 respectively, and the second direction and the first direction both intersect with the first surface 2111.

[0080] By thermally conductively connecting both sides of the heat conductive member 40 to the first surface 2111 of the battery cell 21, the heat exchange effect of the heat conductive member 40 with the battery cell 21 is improved.

[0081] 1, 4 and 11, in some embodiments of the present application, the battery 10 includes at least two battery assemblies 20 arranged along the second direction and at least one thermally conductive member 40, one first surface 2111 of each battery cell 21 of each battery assembly 20 is thermally conductively connected to one thermally conductive member 40, and the second direction and the first direction both intersect with the first surface. By thermally conductively connecting one first surface 2111 of the battery cell 21 to the thermally conductive member 40, the battery cells 21 can be effectively heat exchanged, and the number of thermally conductive members 40 installed can be reduced, the weight of the battery 10 can be reduced, and the cost of the battery 10 can be reduced.

[0082] As shown in FIGS. 1 and 23, in some embodiments of the present application, the longitudinal direction of the battery 10 is parallel to or intersects with the direction of travel of the power consuming device 1.

[0083] Specifically, in some embodiments of the present application, the longitudinal direction of the battery 10 can be installed parallel to the running direction of the power consuming device 1, so that when the thermal conductive member 40 is installed along the longitudinal direction of the battery 10, both ends of the thermal conductive member 40 are respectively provided at both ends of the longitudinal direction of the battery 10, i.e., at both ends of the running direction of the power consuming device 1, and when the power consuming device 1 collides along the lateral direction, the impact force does not act directly on the ends of the thermal conductive member 40, thereby preventing damage to the thermal conductive member 40 and ensuring the safety and reliability of the use of the battery 10.

[0084] In some embodiments of the present application, the longitudinal direction of the battery 10 may be installed at an angle to the direction of travel of the power consumer 1, thereby allowing the battery 10 to power the power consumer 1 as well, thereby making it easier to position the battery 10.

[0085] As shown in FIGS. 21-24, in some embodiments of the present application, heat exchange medium passages are provided within the heat transfer member 40. As shown in FIG.

[0086] The heat exchange medium passage is used for the flow of the heat exchange medium, which carries away heat released by the battery cells 21 or heats the battery cells 21, thereby improving the heat exchange efficiency of the battery cells 21. Here, the heat exchange medium may be a heat exchange liquid, and specifically, an oil liquid or an aqueous liquid may be adopted.

[0087] Fig. 25 is a structural schematic diagram of a cross section along the line BB according to an embodiment of the present application, and Fig. 26 is an enlarged structural schematic diagram of a portion C according to an embodiment of the present application. As shown in Figs. 4, 11, 23, 24, 25 and 26, in some embodiments of the present application, the battery 10 includes a plurality of thermally conductive members 40, which are arranged along a second direction, and both the second direction and the first direction intersect with the first surface 2111.

[0088] As shown in Figures 13, 14, 23, 24, 25 and 26, in some embodiments of the present application, the battery 10 includes a plurality of thermally conductive members 40, the plurality of thermally conductive members 40 being aligned along a second direction, and both the second direction and the first direction intersect with the first surface 2111.

[0089] As shown in Figures 15, 16, 23, 24, 25 and 26, in some embodiments of the present application, the battery 10 includes a plurality of thermally conductive members 40, the plurality of thermally conductive members 40 being aligned along a second direction, and both the second direction and the first direction intersect with the first surface 2111.

[0090] As shown in Figures 19, 20, 23, 24, 25 and 26, in some embodiments of the present application, the battery 10 includes a plurality of thermally conductive members 40, the plurality of thermally conductive members 40 being aligned along a second direction, and both the second direction and the first direction intersect with the first surface 2111.

[0091] A plurality of thermally conductive members 40 are arranged along a third direction, and thermally conductively connect the first surfaces 2111 of the battery cells 21 respectively through the plurality of thermally conductive members 40, which are used jointly to exchange heat with the battery 10, thereby effectively improving the heat exchange speed for the battery 10.

[0092] As shown in Figures 4, 11, 23, 24, 25 and 26, in some embodiments of the present application, a thermally conductive member 40 is provided on each side of the battery assembly 20 along the second direction, and the battery assembly 20 is thermally conductively connected to the thermally conductive members 40 on both sides.

[0093] As shown in Figures 13, 14, 23, 24, 25 and 26, in some embodiments of the present application, a thermally conductive member 40 is provided on each side of the battery assembly 20 along the second direction, and the battery assembly 20 is thermally conductively connected to the thermally conductive members 40 on both sides.

[0094] As shown in Figures 15, 16, 23, 24, 25 and 26, in some embodiments of the present application, a thermally conductive member 40 is provided on each side of the battery assembly 20 along the second direction, and the battery assembly 20 is thermally conductively connected to the thermally conductive members 40 on both sides.

[0095] As shown in Figures 19, 20, 23, 24, 25 and 26, in some embodiments of the present application, a thermally conductive member 40 is provided on each side of the battery assembly 20 along the second direction, and the battery assembly 20 is thermally conductively connected to the thermally conductive members 40 on both sides.

[0096] By simultaneously thermally conductively connecting both sides of the battery assembly 20 to the heat conductive member 40, both sides of the battery assembly 20 can simultaneously exchange heat, which effectively improves the heat exchange speed for the battery 10.

[0097] As shown in Figures 4, 11, 23, 24, 25 and 26, in some embodiments of the present application, along the second direction, the battery cell 21 includes two opposing first surfaces 2111, and the two first surfaces 2111 of the battery cell 21 are thermally conductively connected to one thermally conductive member 40 respectively.

[0098] As shown in Figures 15, 16, 23, 24, 25 and 26, in some embodiments of the present application, along the second direction, the battery cell 21 includes two opposing first surfaces 2111, and the two first surfaces 2111 of the battery cell 21 are thermally conductively connected to one thermally conductive member 40 respectively.

[0099] When the battery cell 21 has the two first surfaces 2111 with the largest areas, the two first surfaces 2111 exchange heat simultaneously, thereby effectively improving the heat exchange rate for the battery 10 .

[0100] As shown in Figures 4, 5, 11, 25 and 26, in some embodiments of the present application, the battery cell 21 includes an electrode assembly 213, which includes a main body and a tab protruding from the main body, the tab being electrically connected to an electrode terminal 214, the projections of the thermally conductive member 40 and the main body along the second direction at least partially overlap, and the second direction and the first direction both intersect with the first surface 2111.

[0101] Specifically, the thermally conductive member 40 is installed so as to extend along a first direction, and is provided on the side surface of the battery cell 21 along a second direction. Here, the first direction is the longitudinal direction of the battery cell 21, and the second direction is the width direction of the battery cell 21.

[0102] As shown in Figures 13, 14, 25 and 26, in some embodiments of the present application, the battery cell 21 includes an electrode assembly 213, the electrode assembly 213 includes a main body portion 2131 and a tab 2132 protruding from the main body portion 2131, the tab 2132 is electrically connected to the electrode terminal 214, the projections of the thermally conductive member 40 and the main body portion 2131 along the second direction at least partially overlap, and the second direction and the first direction both intersect the first surface 2111.

[0103] Specifically, the thermally conductive member 40 is installed so as to extend along a first direction, and is provided on the side surface of the battery cell 21 along a second direction. Here, the first direction is the traveling direction of the power consuming device 1, and the second direction is the radial direction of the battery cell 21.

[0104] As shown in Figures 15, 16, 25 and 26, in some embodiments of the present application, the battery cell 21 includes an electrode assembly 213, the electrode assembly 213 includes a main body portion 2131 and a tab 2132 protruding from the main body portion 2131, the tab 2132 is electrically connected to the electrode terminal 214, the projections of the thermally conductive member 40 and the main body portion 2131 along the second direction at least partially overlap, and the second direction and the first direction both intersect the first surface 2111.

[0105] Specifically, the thermally conductive member 40 is installed so as to extend along a first direction, and is provided on a side surface of the battery cell 21 along a second direction. Here, the first direction is the traveling direction of the power consuming device 1, and the second direction is the lateral direction of the power consuming device 1.

[0106] As shown in Figures 19, 20, 25 and 26, in some embodiments of the present application, the battery cell 21 includes an electrode assembly 213, the electrode assembly 213 includes a main body portion 2131 and a tab 2132 protruding from the main body portion 2131, the tab 2132 is electrically connected to the electrode terminal 214, and along the second direction, the projections of the thermal conduction member 40 and the main body portion 2131 at least partially overlap, and both the second direction and the first direction intersect with the first surface 2111.

[0107] Specifically, the thermally conductive member 40 is installed so as to extend along a first direction, and is provided on a side surface of the battery cell 21 along a second direction. Here, the first direction is the traveling direction of the power consuming device 1, and the second direction is the lateral direction of the power consuming device 1.

[0108] By arranging the thermal conduction member 40 and the main body portion 2131 so as to at least partially overlap along the second direction, heat can be effectively exchanged with the main body portion 2131 through the thermal conduction member 40, thereby ensuring the heat exchange effect for the battery 10.

[0109] As shown in Figures 4, 5, 11, 25 and 26, in some embodiments of the present application, the size of the main body portion 2131 along the third direction is L1, the size of the thermal conduction member 40 is L2, and 0.5≦L2 / L1≦1.5, where the first direction, the second direction and the third direction intersect two by two.

[0110] Specifically, the first direction is the longitudinal direction of the battery cell 21, and the third direction is the height direction of the battery cell 21.

[0111] As shown in Figures 13, 14, 25 and 26, in some embodiments of the present application, the size of the main body portion 2131 along the third direction is L1, the size of the thermal conduction member 40 is L2, and 0.5≦L2 / L1≦1.5, where the first direction, the second direction and the third direction intersect two by two.

[0112] Specifically, the first direction is the direction in which the power consuming device 1 travels, and the third direction is the height direction of the battery cells 21.

[0113] As shown in Figures 19, 20, 25 and 26, in some embodiments of the present application, the size of the main body portion 2131 along the third direction is L1, the size of the thermal conduction member 40 is L2, and 0.5≦L2 / L1≦1.5, where the first direction, the second direction and the third direction intersect two by two.

[0114] Specifically, the first direction is the direction in which the power consuming device 1 travels, and the third direction is the height direction of the battery cells 21.

[0115] By setting the L2 / L1 ratio in the range greater than 0.5 and less than 1.5 and ensuring that the heat conduction member 40 has a sufficient heat conduction area, heat exchange can be performed with the main body portion 2131, and the heat exchange effect of the heat conduction member 40 on the main body portion 2131 can be significantly enhanced.

[0116] It should be understood that when L2 / L1 is smaller than 0.5, the size of the thermal conductive member 40 is too small and cannot effectively exchange heat with the battery cell 21; when L2 / L1 is larger than 1.5, the size of the thermal conductive member 40 is relatively large and is likely to occupy space in the battery 10, which is disadvantageous to improving the space utilization rate of the battery 10.

[0117] It should be noted that in some embodiments of the present application, the set value of L2 / L1 may be 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4...1.5.

[0118] As shown in Figures 4, 5, 11, 25 and 26, in some embodiments of the present application, the size of the overlapping area along the second direction is L3, where 0.5 < L3 / L1 < 1.

[0119] By setting the size of the overlapping area in the second direction, the heat exchange area between the heat conduction member 40 and the main body portion 2131 can be set rationally, and the heat exchange effect of the heat conduction member 40 on the main body portion 2131 can be significantly enhanced.

[0120] It should be understood that when L3 / L1 is smaller than 0.5, the overlapping area between the thermal conductive member 40 and the main body portion 2131 is too small, so that the heat exchange effect of the thermal conductive member 40 on the battery cell 21 is reduced, and heat dissipation to the battery cell 21 cannot be effectively guaranteed.

[0121] It should be noted that in some embodiments of the present application, the set value of L3 / L1 may be 0.5, 0.6, 0.7, 0.8, 0.9...1.

[0122] 23 and 24 , in some embodiments of the present application, the battery 10 further includes a current collecting member 50, which is in fluid communication with a plurality of heat conducting members 40, where the current collecting member 50 is provided at one end of the heat conducting member 40 located in the first direction, or the current collecting member 50 is provided at each of both ends of the heat conducting member 40 located in the first direction. The current collecting member 50 is used to supply or collect the heat exchange medium in the heat exchange medium passage, thereby to exchange heat with the battery 10.

[0123] Specifically, since the multiple thermal conductive members 40 are respectively installed along the longitudinal direction of the battery 10 or along the running direction of the power consuming device 1, in order to fluidly communicate with the multiple thermal conductive members 40 via the current collecting members 50, the current collecting members 50 are provided at one end of the longitudinal direction of the battery 10 or at an end in the running direction of the power consuming device 1, and the current collecting members 50 are installed at one end or both ends according to actual needs.

[0124] The current collecting member 50 is provided at the end of the heat conducting member 40 in the first direction, so that when the power consuming device 1 collides along the lateral direction, the impact force does not act directly on the current collecting member 50 at the end in the traveling direction of the power consuming device 1, thereby preventing damage to the current collecting member 50 and ensuring the safety and reliability of the use of the battery 10.

[0125] As shown in Figures 23 and 24, in some embodiments of the present application, there are two collecting members 50, the two collecting members 50 are provided at one end of the thermal conductive member 40 located in a first direction, and the two collecting members 50 are arranged along a third direction, and both the third direction and the first direction intersect with the horizontal plane.

[0126] Specifically, in some embodiments of the present application, the third direction may be a vertical direction, i.e., two current collecting members 50 are installed at an interval along the vertical direction, where the two current collecting members 50 may be a water supply collecting member and a drainage collecting member, respectively.

[0127] By arranging the two current collecting members 50 together at one end in the first direction and along the third direction, the space occupied by the current collecting members 50 in the battery 10 along the first direction can be effectively reduced, thereby making it easier to install other structures in the battery 10 and improving the energy density of the battery 10; by arranging the two current collecting members 50 together at one end in the first direction, the probability of the current collecting members being damaged when facing a collision in the first direction can be further reduced.

[0128] As shown in Figures 1, 4 and 11, in some embodiments of the present application, the battery cell 21 includes two second surfaces 2121, the two second surfaces 2121 are arranged opposite each other along the second direction or the third direction, the first direction, the second direction and the third direction intersect two by two, the battery cell 21 includes an electrode terminal 214, the electrode terminal 214 is provided on the second surface 2121, and the surface area of ​​the second surface 2121 is smaller than the surface area of ​​the first surface 2111.

[0129] Specifically, as shown in Figs. 1, 4 and 11, in some embodiments of the present application, the battery cell 21 may include two first surfaces 2111 arranged opposite to each other along the second direction and two second surfaces 2121 arranged opposite to each other along the third direction, where the electrode terminals 214 are provided on the second surfaces 2121. Here, the second direction is a lateral direction of the power consuming device 1, and the third direction is a vertical direction. In some embodiments of the present application, the vertical direction may be set as the second direction, and the lateral direction of the power consuming device 1 may be set as the third direction, i.e., the two second surfaces 2121 are arranged along the second direction, and the electrode terminals 214 are provided on the second surfaces 2121.

[0130] By providing the electrode terminal 214 on the second surface 2121 , it is possible to supply power to the power consuming device 1 via the electrode terminal 214 on the second surface 2121 .

[0131] 4 and 11 , in some embodiments of the present application, the electrode terminal 214 includes two electrode terminals 214 with opposite polarities, and the two electrode terminals 214 are provided on one second surface 2121, or the two electrode terminals 214 are provided on two second surfaces 2121, respectively. In some embodiments, one of the two electrode terminals 214 may be formed by the case 211 of the battery cell 21.

[0132] 4 and 11, the battery cell 21 includes two electrode terminals 214, and the two electrode terminals 214 are both provided on the same second surface 2121 along the third direction. Here, the third direction may be a vertical direction. In some embodiments of the present application, the two electrode terminals 214 may be provided on the two second surfaces 2121, respectively.

[0133] 4 and 12, the battery cell 21 includes two electrode terminals 214, and the two electrode terminals 214 are both provided on the same second surface 2121 along the third direction. Here, the third direction is the horizontal direction. In some embodiments of the present application, the two electrode terminals 214 may be provided on the two second surfaces 2121, respectively.

[0134] 13 and 14 , the battery cell 21 includes two electrode terminals 214, and the two electrode terminals 214 are provided on the two second surfaces 2121 respectively along the third direction, one of the electrode terminals 214 is flush with the end face of the battery cell 21, and the end of the battery cell 21 is the electrode terminal 214. Here, the third direction is the vertical direction.

[0135] 16 and 18, the battery cell 21 may include two electrode terminals 214, and the two electrode terminals 214 may be provided on two second surfaces 2121, respectively. Here, the third direction is the horizontal direction. In some embodiments of the present application, the two electrode terminals 214 may be provided on the same second surface 2121 along the third direction.

[0136] By providing two electrode terminals 214 of opposite polarity on the same second surface 2121 of the battery cell 21 as necessary, or on two second surfaces 2121, respectively, the electrode terminals 214 can escape the first surface 2111 that exchanges heat with the thermal conductive member 40, and then easily be electrically connected to another adjacent battery cell 21.

[0137] As shown in FIGS. 1, 19 and 20, in some embodiments of the present application, the electrode terminal 214 is provided on the first surface 2111.

[0138] Specifically, the battery cell 21 includes two electrode terminals 214, and the two electrode terminals 214 are both provided on the first surface 2111. Here, the longitudinal direction of the battery cell 21 is installed along the first direction, and the two electrode terminals 214 are both provided on the first surface 2111. By providing the electrode terminals 214 on the first surface 2111, it is possible to save the space of the battery 10 that is occupied by the electrode terminals 214 along the first direction or the third direction, and further increase the energy density of the battery 10.

[0139] As shown in Figures 1, 19 and 20, in some embodiments of the present application, the battery cell 21 includes a first surface 2111 and a fourth surface arranged opposite to the first surface 2111, the first surface 2111 and the fourth surface are arranged opposite to each other along a second direction, the second direction and the first direction both intersect with the first surface 2111, a recess is provided on an edge of the fourth surface, the first surface 2111 is used for installing an electrode terminal 214, the electrode terminal 214 is arranged to protrude from the first surface 2111 in the second direction and corresponds to the recess.

[0140] By providing the electrode terminal 214 on the first surface 2111 and providing a recess corresponding to the electrode terminal 214 on the edge of the fourth surface, the recess can accommodate the electrode terminal 214 of the adjacent battery cell 21 and leave operating space for electrical connection, making the overall structure of the battery 10 more compact and increasing the space utilization rate.

[0141] As shown in Figures 4 and 11, in some embodiments of the present application, the battery cell 21 further includes a pressure relief mechanism 215, and there is at least one electrode terminal 214, and the pressure relief mechanism 215 and the at least one electrode terminal 214 are provided on the same second surface 2121, or the pressure relief mechanism 215 and the electrode terminal 214 are provided on two second surfaces 2121, respectively.

[0142] 4 and 11, the battery cell 21 further includes a pressure relief mechanism 215, and the pressure relief mechanism 215 and the two electrode terminals 214 are both provided on the same second surface 2121 along the third direction, where the third direction is a vertical direction. In some embodiments of the present application, the pressure relief mechanism 215 is provided on one second surface 2121 along the third direction, and the two electrode terminals 214 are both provided on another second surface 2121 along the third direction, or the two electrode terminals 214 are respectively provided on two second surfaces 2121 along the third direction, and the pressure relief mechanism 215 and one of the electrode terminals 214 are both provided on one of the second surfaces 2121.

[0143] 13 and 14 , the battery cell 21 further includes a pressure relief mechanism 215, and an electrode terminal 214 is provided to protrude from one of the second surfaces 2121, and both the pressure relief mechanism 215 and the protruding electrode terminal 214 are provided on the second surface 2121. Alternatively, the electrode terminal 214 is provided to protrude from one of the second surfaces 2121, and the pressure relief mechanism 215 is provided on another second surface 2121 on which the electrode terminal 214 is not provided to protrude.

[0144] 16 and 18 , the battery cell further includes a pressure relief mechanism 215, and the two electrode terminals 214 are respectively disposed on two second surfaces 2121 along a third direction, and the pressure relief mechanism 215 and one of the electrode terminals 214 are both disposed on one of the second surfaces 2121, where the third direction is a horizontal direction; or the pressure relief mechanism 215 is disposed on one of the second surfaces 2121 along the third direction, and the two electrode terminals 214 are both disposed on another of the second surfaces 2121 along the third direction, or the pressure relief mechanism 215 and the two electrode terminals 214 are both disposed on the same second surface 2121 along the third direction.

[0145] The pressure relief mechanism 215 communicates with the inside of the battery cell 21 and is used to release the pressure inside the battery cell 21 when the internal pressure of the battery cell 21 becomes large. The pressure relief mechanism 215 may be provided on the same second surface 2121 as the electrode terminal 214 as necessary, or may be provided on two second surfaces 2121 respectively, so that the pressure relief mechanism 215 can escape the first surface 2111 that exchanges heat with the thermal conductive member 40, and facilitate the pressure relief mechanism 215 to smoothly exhaust when thermal runaway occurs in the battery cell 21.

[0146] As shown in Figures 6 and 11, in some embodiments of the present application, the battery cell 21 further includes a pressure relief mechanism 215 and two oppositely disposed third surfaces 2112, and the pressure relief mechanism 215 is provided on at least one of the third surfaces 2112.

[0147] Specifically, as shown in Figures 6 and 11, the battery cell 21 includes two second surfaces 2121 arranged opposite each other along a third direction, and an electrode terminal 214 is provided on the second surface 2121. The battery cell 21 further includes two third surfaces 2112 arranged opposite each other along a first direction, and a pressure relief mechanism 215 is provided on the third surface 2112.

[0148] As shown in Figures 17 and 18, the battery cell 21 includes two second surfaces 2121 arranged opposite each other along a third direction, and an electrode terminal 214 is provided on the second surface 2121. The battery cell 21 further includes two third surfaces 2112 arranged opposite each other along a first direction, and a pressure relief mechanism 215 is provided on the third surface 2112.

[0149] By providing the pressure release mechanism 215 on the third surface 2112 and the electrode terminal 214 on the second surface 2121, the pressure release mechanism 215 and the electrode terminal 214 are separated, which makes it easier to reduce the risk that the exhaust from the pressure release mechanism 215 will affect the electrode terminal 214 if thermal runaway occurs in the battery cell 21.

[0150] 8, in some embodiments of the present application, the battery cell 21 further includes a pressure relief mechanism 215, and the pressure relief mechanism 215 is provided on the first surface 2111. By providing the pressure relief mechanism 215 on the first surface 2111, the battery cell 21 is easy to install.

[0151] 19 and 20 , in some embodiments of the present application, the battery cell 21 further includes a pressure relief mechanism 215, and the pressure relief mechanism 215 is provided on the first surface 2111. By providing the pressure relief mechanism 215 on the first surface 2111, the battery cell 21 is easy to install.

[0152] As shown in Figures 4, 5 and 11, in some embodiments of the present application, the battery cell 21 includes an electrode assembly 213, which has a wound structure and is flat, and the outer surface of the electrode assembly 213 includes two flat surfaces, which face each other along a second direction; or the electrode assembly 213 has a stacked structure, and the first plate, the separator and the second plate of the electrode assembly 213 are stacked along the second direction, and the second direction and the first direction both intersect with the first surface.

[0153] By arranging the electrode assembly 213 in a stacked structure or a wound structure, power can be effectively supplied to the power consuming device 1 via the electrode assembly 213 in either case.

[0154] As shown in FIGS. 4, 10 and 11, in some embodiments of the present application, a battery assembly 20 includes at least two battery cells 21, and the at least two battery cells 21 are aligned along a first direction.

[0155] As shown in FIGS. 4, 10 and 12, in some embodiments of the present application, a battery assembly 20 includes at least two battery cells 21, and the at least two battery cells 21 are aligned along a first direction.

[0156] As shown in FIGS. 10, 13 and 14, in some embodiments of the present application, a battery assembly 20 includes at least two battery cells 21, and the at least two battery cells 21 are aligned along a first direction.

[0157] 10, 15 and 16, in some embodiments of the present application, a battery assembly 20 includes at least two battery cells 21, and the at least two battery cells 21 are aligned along a first direction. It should be noted that in FIG. 16, only one battery cell 21 is shown aligned along the first direction.

[0158] As shown in FIGS. 10, 16 and 18, in some embodiments of the present application, a battery assembly 20 includes at least two battery cells 21, and the at least two battery cells 21 are aligned along a first direction.

[0159] 10, 19 and 20, in some embodiments of the present application, a battery assembly 20 includes at least two battery cells 21, and the at least two battery cells 21 are aligned along a first direction. It should be noted that in FIG. 19, only one battery cell 21 is shown aligned along the first direction.

[0160] When at least two battery cells 21 are arranged along a first direction and the battery cells 21 need to exchange heat, the heat conduction member 40 can be installed along the first direction, so that the at least two battery cells 21 in the battery assembly 20 can easily exchange heat respectively, thereby improving the heat exchange speed of the heat conduction member 40.

[0161] As shown in Figures 4, 11, 13, 14, 19 and 20, in some embodiments of the present application, the maximum size of the battery cell 21 along the first direction is L, the maximum size of the battery cell 21 along the third direction is H, and the L / H ratio is in the range of 0.5 to 6.

[0162] Here, when the battery cell 21 is as shown in FIG. 4 or FIG. 20, the L / H has a maximum size ratio of 6, and when the battery cell 21 is as shown in FIG. 14, the L / H has a minimum size ratio of 0.5.

[0163] When the size ratio of L / H is greater than 6, the size of the battery cell 21 along the first direction is too large, which not only makes it difficult to install but also reduces the support strength of the battery cell 21. When the size ratio of L / H is less than 0.5, the size of the battery cell 21 along the third direction is too large, which not only makes it difficult to install but also reduces the support strength of the battery cell 21.

[0164] It should be noted that the set value of L / H may be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4...5, 5.5...6. By setting different values ​​for L / H, the demands of the battery cells 21 having different shapes and even different models of the battery 10 can be met.

[0165] The maximum size H of the battery cell 21 includes both the size of the case 211 and the size of the electrode terminal 214 that is installed protruding from the case 211. By installing the battery cell 21 according to the above size ratio, it is possible to maximize the amount of power of the battery cell 21 while ensuring the support strength of the battery cell 21, and it also becomes easier to install the battery cell 21.

[0166] As shown in Figures 4, 11, 13, 14, 19 and 20, in some embodiments of the present application, the maximum size of the battery cells 21 along the second direction is D, where the L / D ratio ranges from 1 to 30, and the first direction, the second direction and the third direction intersect two by two.

[0167] When the size ratio of L / D is larger than 30, the size of the battery cell 21 along the first direction is too large, which not only makes it difficult to install, but also reduces the supporting strength of the battery cell 21. When the size ratio of L / D is smaller than 1, the size of the battery cell 21 along the first direction is too small, which reduces the amount of power of the battery cell 21.

[0168] It should be noted that the set value of L / D may be 1, 2, 3, 4, 5, 6, 7, 8, 10, 15, 20, 25, 28, 30. By setting different values ​​for L / D, the battery cells 21 can have different shapes and further meet the demands of batteries 10 with different models.

[0169] Here, when the battery cell 21 is as shown in the embodiments of Figures 15 to 20, the L / D has a maximum size ratio of 30, and when the battery cell 21 is as shown in Figure 14, the L / D has a minimum size ratio of 1. By installing the battery cell 21 according to the above size ratio, it is possible to maximize the amount of power of the battery cell 21 while ensuring the supporting strength of the battery cell 21.

[0170] Fig. 27 is a schematic diagram of the internal structure of the second portion 32 according to an embodiment of the present application, and Fig. 28 is a schematic diagram of an enlarged structure of part D according to an embodiment of the present application. As shown in Figs. 4, 11, 25, 26, 27 and 28, in some embodiments of the present application, the battery 10 further includes a stopper 321, the stopper 321 is disposed along a third direction to face a second surface 2121 of the battery cell 21 on which the electrode terminal 214 is provided, the distance between the electrode terminal 214 and the stopper 321 is 1.2 mm to 25 mm, and both the third direction and the first direction intersect with the horizontal plane.

[0171] Specifically, the stopper 321 may be a part of the housing 30 itself, or the stopper 321 may be connected to the housing 30 and provided within the housing 30. The third direction may be the vertical direction.

[0172] As shown in Figures 13, 14, 25, 26, 27 and 28, in some embodiments of the present application, the battery cell 21 further includes a stopper 321, and the stopper 321 is installed along the third direction opposite a second surface 2121 of the battery cell 21 on which the electrode terminal 214 is provided, the distance between the electrode terminal 214 and the stopper 321 is 1.2 mm to 25 mm, and both the third direction and the first direction intersect with the horizontal plane.

[0173] If the distance between the electrode terminal 214 and the stopper 321 is less than 1.2 mm, the electrode terminal 214 is likely to collide with the stopper, resulting in damage to the electrode terminal 214. If the distance between the electrode terminal 214 and the stopper 321 is greater than 25 mm, the size of the battery 10 will be too large, making it difficult to install and mount the battery 10.

[0174] By placing the stopper 321 and the electrode terminal 214 with a distance of 1.2 mm to 25 mm between them, when the battery 10 collides in the third direction, it is possible to prevent the stopper 321 and the electrode terminal 214 from colliding with each other, which would otherwise cause damage to the electrode terminal 214.

[0175] It should be noted that the size of the gap between the stopper 321 and the electrode terminal 214 may be 1.2, 1.5, 1.8, 2, 3, 4, 5, 6, 7, 8, 10, 15, 20, 23, 24, 25 mm.

[0176] As shown in Figures 1, 4, 11, 25, 26, 27 and 28, in some embodiments of the present application, at least one electrode terminal 214 is located below the battery cell 21 and the stopper 321 is located below the electrode terminal 214, or at least one electrode terminal 214 is located above the battery cell 21 and the stopper 321 is located above the electrode terminal 214.

[0177] Specifically, the electrode terminal 214 and the stopper 321 are both disposed along the third direction, and the stopper 321 is located below the battery cell 21, i.e., the stopper 321 is disposed closer to the second portion 32 than the electrode terminal 214. Here, the third direction may be a vertical direction, and the two electrode terminals 214 may both be disposed below the battery cell 21, or one of them may be disposed below the battery cell 21 and the other may be disposed above the battery cell 21. Alternatively, the electrode terminal 214 and the stopper 321 are both disposed along the third direction, and the stopper 321 is located above the battery cell 21, i.e., the stopper 321 is disposed closer to the first portion 31 than the electrode terminal 214, and here, the two electrode terminals 214 may both be disposed above the battery cell 21, or one of them may be disposed below the battery cell 21 and the other may be disposed above the battery cell 21.

[0178] As shown in Figures 1, 13, 14, 25, 26, 27 and 28, in some embodiments of the present application, the battery cell 21 includes one electrode terminal 214 that is protruding, and the protruding electrode terminal 214 is located below the battery cell 21 and the stopper 321 is located below the electrode terminal 214, or the protruding electrode terminal 214 is located above the battery cell 21 and the stopper 321 is located above the electrode terminal 214.

[0179] The stopper 321 can be provided below the electrode terminal 214 along the third direction, or above the electrode terminal 214 along the third direction, so that it can be reasonably arranged based on the actual mounting position.

[0180] As shown in Figures 4, 11, 25 and 26, in some embodiments of the present application, the electrode terminal 214 is provided on one second surface 2121, the battery 10 includes a support plate 311, and the battery cell 21 is fixedly connected to the support plate 311 via another second surface 2121 on which the electrode terminal 214 is not provided, and both the second direction and the first direction intersect with the horizontal plane.

[0181] Specifically, the support plate 311 may be a part of the housing 30 itself, or the support plate 311 may be connected to the housing 30 and provided within the housing 30. Here, the support plate 311 may be installed in the first portion 31 or the second portion 32.

[0182] As shown in Figures 4, 11, 25 and 26, the two electrode terminals 214 may both be provided on one of the second surfaces 2121 of the battery cells 21 along a third direction, and the other second surface 2121 without the electrode terminal 214 is fixedly connected to the support plate 311, thereby allowing the battery cell 21 to be fixedly provided within the housing 30.

[0183] As shown in Figures 13, 14, 25 and 26, the electrode terminal 214 is protruding from one of the second surfaces 2121, and the other second surface 2121 on which the electrode terminal 214 is not protruding is fixedly connected to the support plate 311.

[0184] By fixing the battery cells 21 inside the housing 30 via the support plate 311, the battery cells 21 can be easily attached and fixed.

[0185] As shown in Figures 4, 11, 25 and 26, in some embodiments of the present application, another second surface 2121 is fixedly connected to the support plate 311 via a first adhesive layer 61, and the thermal conduction member 40 is thermally conductively connected to the first surface 2111 via a second adhesive layer 62, and the thermal conductivity coefficient of the first adhesive layer 61 is less than or equal to the thermal conductivity coefficient of the second adhesive layer 62.

[0186] Specifically, the surface on which the electrode terminals 214 are not provided is fixedly connected to the support plate 311 via the first adhesive layer 61 .

[0187] 13, 14, 25 and 26, in some embodiments of the present application, the second surface 2121 on which the electrode terminal 214 is not protruding is fixedly connected to the support plate 311 via a first adhesive layer 61, and the heat conductive member 40 is thermally conductively connected to the first surface 2111 via a second adhesive layer 62. Here, the first adhesive layer 61 and the second adhesive layer 62 are each selected as a heat conductive polyurethane adhesive layer, and different amounts of heat conductive particles can be added thereto to reach different heat conductivity coefficients.

[0188] Since the first adhesive layer 61 is used to connect the second surface 2121 and the support plate 311, and the second adhesive layer 62 is used to thermally connect the first surface 2111 and the thermal conduction member 40, the thermal conduction coefficient of the first adhesive layer 61 is set to be equal to or lower than the thermal conduction coefficient of the second adhesive layer 62 to ensure more effective heat exchange of the battery cell 21 through the thermal conduction member 40.

[0189] 25 and 26, in some embodiments of the present application, the ratio of the thermal conductivity coefficient of the first adhesive layer 61 to the thermal conductivity coefficient of the second adhesive layer 62 is in the range of 0.1 to 1. By installing them in accordance with the above ratio, it is possible to effectively exchange heat with the battery cells 21 via the thermal conductive member 40 in any case.

[0190] It should be understood that when the ratio between the thermal conductivity coefficient of the first adhesive layer 61 and the thermal conductivity coefficient of the second adhesive layer 62 is smaller than 0.1, the thermal conductivity ability of the first adhesive layer 61 is relatively poor, and the support plate 311 connected to the first adhesive layer 61 cannot transfer heat through one side of the first adhesive layer 61, and therefore cannot exchange heat with the support plate 311. When the ratio between the thermal conductivity coefficient of the first adhesive layer 61 and the thermal conductivity coefficient of the second adhesive layer 62 is larger than 1, the thermal conductivity ability of the first adhesive layer 61 is stronger than that of the second adhesive layer 62, and the ability of the battery cell 21 to dissipate heat through the thermal conductive member 40 is weakened, and the heat dissipation effect of the battery cell 21 is reduced.

[0191] It should be noted that the ratio between the thermal conductivity coefficient of the first adhesive layer 61 and the thermal conductivity coefficient of the second adhesive layer 62 may be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9...1.

[0192] As shown in Figures 1 to 28, a second aspect of the present application proposes an electric power consuming device 1, which includes any one of the batteries 10 described above, and the battery 10 is used to provide electric energy to power the electric power consuming device 1 to run.

[0193] Fig. 29 is a schematic diagram of a distribution structure of the battery 10 in the power consuming device 1 according to an embodiment of the present application. As shown in Figs. 1 to 29, in some embodiments of the present application, when the longitudinal direction of the battery 10 is different from the running direction of the power consuming device 1, the first direction is the running direction of the power consuming device 1.

[0194] In some embodiments, the lengthwise direction of the battery 10 may be perpendicular to the travel direction of the power consuming device 1, for example, one or more batteries 10 may be arranged in the travel direction of the power consuming device 1, and when multiple batteries 10 are arranged, the lengthwise direction of at least one battery 10 is perpendicular to the travel direction of the power consuming device 1. In such embodiments, the first direction is the travel direction of the power consuming device 1, i.e., in a battery 10 whose lengthwise direction is perpendicular to the travel direction of the power consuming device 1, the battery assembly 20 and the thermally conductive member 40 are arranged along the width direction of the battery 10 and coincide with the travel direction of the power consuming device 1.

[0195] The power consumption device 1 of the present application may be a mobile phone, a portable device, a laptop computer, a battery-powered vehicle, an electric toy, an electric tool, an electric vehicle, a ship, a spacecraft, etc., for example, a spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.

[0196] The first direction is set as the running direction of the power consuming device 1, and the thermal conductive member 40 is installed along the first direction, i.e., the thermal conductive member 40 is installed along the running direction of the power consuming device 1 having the battery 10, and both ends of the thermal conductive member 40 are respectively provided at both ends in the running direction of the power consuming device 1. Therefore, when the power consuming device 1 collides along the lateral direction, the impact force does not act directly on the ends of the thermal conductive member 40, thereby preventing damage to the thermal conductive member 40 and ensuring the safety and reliability of the use of the battery 10.

[0197] The above description is only an outline of the technical solution of the present application, which can be implemented in accordance with the contents of the specification, in order to make the technical means of the present application more clearly known, and to make the above and other objectives, features and advantages of the present application more clearly understandable, the following particularly cites specific embodiments of the present application for description.

[0198] As shown in Figs. 1, 4, 5, 10, 11, 21 to 28, in one embodiment of the present application, the power consumption device 1 includes a battery 10, and the battery 10 is used to provide electric energy to drive the power consumption device 1 to run. The battery 10 includes a housing 30 and a plurality of battery assemblies 20 provided in the housing 30, and the housing 30 includes a first portion 31 and a second portion 32, and the first portion 31 and the second portion 32 surround a space for accommodating the battery assemblies 20. The plurality of battery assemblies 20 are respectively installed along a first direction and arranged along a second direction. The battery assembly 20 includes a plurality of battery cells 21, and the longitudinal direction of the battery cells 21 is installed along a first direction, the width direction of the battery cells 21 is installed along a second direction, and the height direction of the battery cells 21 is installed along a third direction. The battery cell 21 includes two third surfaces 2112 arranged opposite to each other along the first direction, two first surfaces 2111 arranged opposite to each other along the second direction, and two second surfaces 2121 arranged opposite to each other along the third direction, and the first surfaces 2111 are the surfaces that have the largest area of ​​the battery cell 21. Here, the first direction is the traveling direction of the power consuming device 1, the longitudinal direction of the battery 10 is parallel to the traveling direction of the power consuming device 1, the second direction is a lateral direction to the traveling direction of the power consuming device 1, and the third direction is a vertical direction.

[0199] The battery cell 21 includes an electrode assembly 213, the electrode assembly 213 includes a body portion 2131 and a tab 2132 protruding from the body portion 2131, the tab 2132 is electrically connected to the electrode terminal 214, and projections of the heat conductive member 40 and the body portion 2131 along the second direction at least partially overlap and have an overlapping area. A size of the body portion 2131 along the third direction is L1, a size of the heat conductive member 40 is L2, and a size of the overlapping area is L3, where 0.5≦L2 / L1≦1.5 and 0.5≦L3 / L1≦1.

[0200] The battery cell 21 includes two electrode terminals 214 with opposite polarities, and the two electrode terminals 214 are provided on one second surface 2121. The battery cell 21 further includes a pressure relief mechanism 215, and the pressure relief mechanism 215 and the two electrode terminals 214 are provided on the same second surface 2121. The maximum size of the battery cell 21 along the first direction is L, the maximum size of the battery cell 21 along the third direction is H, and the L / H ratio ranges from 0.5 to 6. The maximum size of the battery cell 21 along the second direction is D, and the L / D ratio ranges from 1 to 30. The battery 10 further includes a stopper 321, and the stopper 321 is provided on the second portion 32. The stopper 321 is disposed along the third direction opposite the second surface 2121 of the battery cell 21 on which the electrode terminal 214 is provided, the electrode terminal 214 is located below the battery cell 21, the stopper 321 is located below the electrode terminal 214, and the size of the gap between the electrode terminal 214 and the stopper 321 is 1.2 mm to 25 mm.

[0201] A plurality of heat conducting members 40 are further provided in the housing 30, the heat conducting members 40 are arranged along a first direction, and the plurality of heat conducting members 40 are arranged along a second direction. A heat conducting member 40 is provided on each side of the battery assembly 20 along the second direction, and the first surfaces 2111 provided on both sides along the second direction are thermally conductively connected to the heat conducting members 40. A heat exchange medium passage is provided in the heat conducting member 40. The battery 10 further includes a current collecting member 50, which is arranged to extend along the second direction and is in fluid communication with the plurality of heat conducting members 40. The number of current collecting members 50 is two, and the two current collecting members are both provided at one end of the traveling direction of the power consuming device 1 and arranged at an interval along the third direction.

[0202] A support plate 311 is further provided within the housing 30, the support plate 311 being provided in the first portion 31, a second surface 2121 on which the electrode terminal 214 is not provided on the battery cell 21 being fixedly connected to the support plate 311 via a first adhesive layer 61, the heat conductive member 40 being thermally conductively connected to the first surface 2111 via a second adhesive layer 62, and the ratio of the thermal conductivity coefficient of the first adhesive layer 61 to the thermal conductivity coefficient of the second adhesive layer 62 being in the range of 0.1 to 1.

[0203] Finally, it should be explained that the above embodiments are merely for illustrating the technical solution of the present application, and are not intended to limit it. Although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified or some or all of the technical features therein can be replaced with equivalents, and such modifications or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application, and all of them should be included in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, all of the technical features mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed in the specification, and includes all technical solutions included within the scope of the claims. [Explanation of symbols]

[0204] 1: Vehicle 10: Battery, 11: Controller, 12: Motor 20: battery assembly, 21: battery cell, 211: case, 2111: first surface, 2112: third surface, 212: end cap, 2121: second surface, 213: electrode assembly, 2131: main body, 2132: tab, 214: electrode terminal, 215: pressure relief mechanism, 30: housing, 31: first part, 311: support plate, 32: second part, 321: stopper 40:Heat conductive material 50: Current collecting member 61: first adhesive layer, 62: second adhesive layer

Claims

1. A battery, a heat conductive member (40) installed along a first direction which is the longitudinal direction of the battery (10) or the traveling direction of an electric power consuming device (1) having the battery (10); a battery assembly (20) including at least one battery cell (21) and disposed along the first direction; A battery characterized in that the battery cell (21) includes a plurality of surfaces, the plurality of surfaces including a first surface (2111) having a maximum area, and the battery cell (21) is thermally connected to the thermal conduction member (40) via at least the first surface (2111).

2. The battery of claim 1 , wherein the first surface (2111) intersects a horizontal plane.

3. The battery of claim 2, further comprising at least two of the battery assemblies (20), and along a second direction, both sides of the thermally conductive member (40) are thermally conductively connected to two of the battery assemblies (20), respectively, and both the second direction and the first direction intersect with the first surface (2111).

4. The battery of claim 2, comprising at least two of the battery assemblies (20) and at least one of the thermally conductive members arranged along a second direction, one of the first surfaces of each of the battery cells of each of the battery assemblies (20) being thermally conductively connected to one of the thermally conductive members (40), and both of the second direction and the first direction intersecting with the first surface (2111).

5. 4. The battery according to claim 1, wherein the longitudinal direction of the battery (10) is parallel to or intersects with the direction of travel of the power consumer (1).

6. 4. The battery according to claim 1, wherein the heat transfer member (40) is provided with a heat exchange medium passage.

7. The battery (10) comprises a plurality of the thermal conduction members (40), the plurality of the thermal conduction members (40) being arranged along a second direction, and the second direction and the first direction both intersect with the first surface (2111). A battery as described in any one of claims 1 to 3, characterized in that the battery (10) comprises a plurality of the thermal conduction members (40), the plurality of the thermal conduction members (40) being arranged along a second direction, the second direction and the first direction both intersecting with the first surface (2111).

8. The battery of claim 7, wherein the heat conductive members (40) are provided on both sides of the battery assembly (20) along the second direction, and the battery assembly (20) is thermally connected to the heat conductive members (40) on both sides.

9. The battery of claim 8, characterized in that along the second direction, the battery cell (21) includes two opposing first surfaces (2111), and each of the two first surfaces (2111) of the battery cell (21) is thermally conductively connected to one of the thermal conductive members (40).

10. The battery described in claim 2 or 3, characterized in that the battery cell (21) includes an electrode assembly (213), the electrode assembly (213) includes a main body portion (2131) and a tab (2132) protruding from the main body portion (2131), the tab (2132) is electrically connected to an electrode terminal (214), the projection of the thermal conduction member (40) and the main body portion (2131) along a second direction at least partially overlaps and has an overlapping area, and the second direction and the first direction both intersect the first surface (2111).

11. The battery described in claim 10, characterized in that the size of the main body portion (2131) along the third direction is L1, the size of the thermal conduction member (40) is L2, where 0.5≦L2 / L1≦1.5, and the first direction, the second direction, and the third direction intersect two by two.

12. The battery of claim 11 , wherein a size of the overlapping region along the third direction is L3, and 0.5≦L3 / L1≦1.

13. The battery (10) further includes a current collecting member (50), the current collecting member (50) being in fluid communication with heat exchange medium passages within the plurality of heat transfer members (40); The battery according to any one of claims 7 to 9, characterized in that the current collecting member (50) is provided at one end of the heat conducting member (40) located in the first direction, or the current collecting member (50) is provided at each of both ends of the heat conducting member (40) located in the first direction.

14. The battery according to claim 13, characterized in that there are two current collecting members (50), the two current collecting members (50) are provided at one end of the heat conducting member (40) located in the first direction, the two current collecting members (50) are arranged along a third direction, and the first direction, the second direction, and the third direction intersect two by two.

15. The battery described in any one of claims 1 to 3, characterized in that the battery cell (21) includes two second surfaces (2121), the two second surfaces (2121) are arranged opposite each other along a second direction or a third direction, the first direction, the second direction, and the third direction intersect two by two, the battery cell (21) includes an electrode terminal (214), the electrode terminal (214) is provided on the second surface (2121), and the surface area of ​​the second surface (2121) is smaller than the surface area of ​​the first surface (2111).

16. The battery of claim 15, characterized in that the electrode terminal (214) includes two electrode terminals (214) of opposite polarity, and the two electrode terminals (214) are provided on one of the second surfaces (2121), or the two electrode terminals (214) are provided on two of the second surfaces (2121), respectively.

17. The battery according to any one of claims 1 to 3, characterized in that the battery cell (21) includes an electrode terminal (214), the electrode terminal (214) being provided on the first surface (2111).

18. The battery cell (21) includes the first surface (2111) and a fourth surface arranged opposite to the first surface, the first surface (2111) and the fourth surface are arranged opposite to each other along a second direction, the second direction and the first direction both intersect with the first surface (2111), a recess is provided on the edge of the fourth surface, the first surface (2111) is used for installing the electrode terminal (214), the electrode terminal (214) is installed protruding from the first surface (2111) in the second direction and corresponds to the recess. The battery of claim 17,

19. The battery of claim 15, characterized in that the battery cell (21) further includes a pressure relief mechanism (215), the electrode terminal (214) is at least one, and the pressure relief mechanism (215) and at least one of the electrode terminals (214) are provided on the same second surface (2121), or the pressure relief mechanism (215) and the electrode terminal (214) are each provided on two of the second surfaces (2121).

20. The battery of claim 15, characterized in that the battery cell (21) further includes a pressure relief mechanism (215) and two oppositely disposed third surfaces, the pressure relief mechanism (215) being provided on at least one of the third surfaces (2121).

21. The battery of claim 15, wherein the battery cell (21) further includes a pressure relief mechanism (215), the pressure relief mechanism (215) being provided on the first surface.

22. The battery cell (21) includes an electrode assembly (213), the electrode assembly (213) has a wound structure and is flat, and an outer surface of the electrode assembly (213) includes two flat surfaces, the two flat surfaces facing each other along a second direction; Or, the electrode assembly (213) has a stacked structure, and the first plate, the separator and the second plate of the electrode assembly (213) are stacked along a second direction; The battery of any one of claims 1 to 3, wherein the second direction and the first direction both intersect the first surface (2111).

23. The battery of any one of claims 1 to 3, characterized in that the battery assembly (20) includes at least two of the battery cells (21), and the at least two battery cells (21) are aligned along the first direction.

24. The battery of claim 3 or 7, characterized in that a maximum size of the battery cells (21) along the first direction is L and a maximum size of the battery cells (21) along the second direction is D, where the L / D ratio ranges from 1 to 30.

25. The battery of claim 24, characterized in that the maximum size of the battery cells (21) along the third direction is H, the L / H ratio ranges from 0.5 to 6, and the first direction, the second direction, and the third direction intersect two by two.

26. The battery of claim 15, characterized in that the electrode terminal is provided on one of the second surfaces (2121), the battery (10) includes a support plate (311), the battery cell (21) is fixedly connected to the support plate (311) via another of the second surfaces (2121) on which the electrode terminal (214) is not provided, and both the second surface (2121) and the first direction intersect with the horizontal plane.

27. The battery of claim 26, characterized in that the other second surface is fixedly connected to the support plate via a first adhesive layer (61), the thermally conductive member is thermally conductively connected to the first surface (2111) via a second adhesive layer (62), and the thermal conductivity coefficient of the first adhesive layer (61) is less than or equal to the thermal conductivity coefficient of the second adhesive layer (62).

28. The battery according to claim 27, characterized in that the ratio of the thermal conductivity coefficient of the first adhesive layer (61) to the thermal conductivity coefficient of the second adhesive layer (62) is in the range of 0.1 to 1.

29. 29. An electric power consuming device comprising a battery (10) according to any one of claims 1 to 28, the battery (10) being used to provide electric energy to drive the electric power consuming device (1) to run.

30. 30. The power consumer device according to claim 29, wherein the first direction is the direction of travel of the power consumer device (1) when the longitudinal direction of the battery (10) is different from the direction of travel of the power consumer device (1).

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