Battery cell, battery device and electric device

Abstract

The invention provides a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly, a shell and an electrode terminal, the shell forms a containing cavity, the electrode assembly is arranged in the containing cavity, the shell comprises a wall body, a plurality of heat exchange runners arranged at intervals are arranged in the wall body, and the heat exchange runners are used for introducing a heat exchange medium; the electrode terminal is arranged on the shell and electrically connected with the electrode assembly, and the current collector connected to the wall body is used for enabling the multiple heat exchange runners to communicate with the heat exchange pipeline. According to the structure, the heat exchange flow channel for introducing the heat exchange medium is arranged in the wall body of the shell, and the heat exchange medium flowing through the wall body can directly exchange heat with the battery monomer, so that a heat transfer path between the heat exchange medium and the battery monomer is shortened, and the heat exchange effect of the battery monomer is improved; and the temperature of the battery monomer can be kept stable.

Description

Technical Field

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

[0002] Battery devices have the advantages of high specific energy and high power density, and are widely used in electronic devices and transportation vehicles, such as mobile phones, laptops, electric vehicles, electric airplanes, electric ships, and electric tools.

[0003] When the battery device is working, the battery cells inside it will generate heat, which will increase the temperature of the battery device and the surrounding environment. In order to make the battery cells work stably, it is usually necessary to exchange heat for the battery cells. How to improve the heat exchange effect of the battery cells and keep the temperature of the battery cells stable has always been a concern of technicians in this field. Summary of the invention

[0004] In view of the above problems, the present application provides a battery cell, a battery device and an electrical device, wherein the battery cell has a good heat exchange effect.

[0005] In the first aspect, the present application provides a battery cell, which includes an electrode assembly, a shell and an electrode terminal. The shell forms a cavity, and the electrode assembly is arranged in the cavity. The shell includes a wall body, and a heat exchange channel is provided in the wall body. The heat exchange channel is used to pass a heat exchange medium. There are multiple heat exchange channels, and the multiple heat exchange channels are arranged at intervals; the electrode terminal is arranged in the shell and electrically connected to the electrode assembly; the collector is connected to the wall body, and the collector is used to connect the multiple heat exchange channels with the heat exchange pipeline.

[0006] In the above structure, since a heat exchange channel for passing a heat exchange medium is provided in the wall of the outer shell, the heat exchange medium flowing through the wall can directly exchange heat with the components in the battery cell cavity, thereby shortening the heat transfer path between the heat exchange medium and the battery cell, improving the heat exchange effect of the battery cell, and facilitating maintaining the temperature of the battery cell stable.

[0007] According to the battery cell provided in some embodiments of the present application, the wall body includes a shell and a cover body, the shell is configured as a wall body, the shell includes an enclosure and a heat exchange part, the heat exchange flow channel is arranged in the heat exchange part, the enclosure part encloses a cavity with an opening at least at one end, the cover body covers the opening, the electrode terminal is arranged on the cover body, and the heat exchange part is connected to the side of the enclosure part away from the cavity. By connecting the heat exchange part provided with the heat exchange flow channel to the side of the enclosure part away from the cavity, so that the heat exchange part is arranged on the outside of the enclosure part, the possibility of interference with the enclosure part during the process of the cover body covering the opening can be reduced, which is conducive to the convenience of installation of the battery cell.

[0008] According to the battery cells provided in some embodiments of the present application, both opposite ends of the cavity have openings, and the heat exchange portion and the enclosure portion are an integrally formed structure, so that the heat exchange portion and the enclosure portion can be manufactured as a whole synchronously, which not only facilitates the processing and manufacturing of the shell, but also makes the overall structure of the shell have good strength.

[0009] According to the battery cells provided in some embodiments of the present application, the heat exchange portion extends out of the enclosure portion along the direction of the opening, so that the interface of the heat exchange channel in the heat exchange portion extends out of the cover body, so that the interface of the heat exchange channel and the external heat exchange pipeline can be more conveniently connected, which is beneficial to the assembly convenience of the battery device including the battery cell.

[0010] According to the battery cells provided in some embodiments of the present application, the heat exchange portion extends out of the enclosure along a direction perpendicular to the thickness direction of the enclosure, and the heat exchange portion protrudes out of the enclosure in a planar extension direction perpendicular to the thickness direction of the enclosure, so that the heat exchange portion has a larger extension area, which is beneficial to improving the heat exchange capacity between the heat exchange portion, the enclosure and the surrounding environment.

[0011] According to the battery cell provided in some embodiments of the present application, the enclosure includes two first parts and two second parts, the two first parts are arranged opposite to each other along a first direction, the two second parts are arranged opposite to each other along a second direction, the first direction and the second direction are perpendicular to each other, the second parts are connected between the first parts, the area of ​​the surface of the first part facing away from the cavity is larger than the area of ​​the surface of the second part facing away from the cavity, and the heat exchange part is connected to the first part, so that the heat exchange part is arranged on a portion of the enclosure with a larger area, which is beneficial for the heat exchange part to have a larger area to be able to set more heat exchange channels, which is helpful to the heat exchange efficiency of the heat exchange part, thereby improving the heat exchange effect of the battery cell.

[0012] According to the battery cell provided in some embodiments of the present application, the wall body includes a shell and a cover body, the shell is configured as a wall body, the shell includes a plurality of shell walls, the plurality of shell walls are sequentially connected and surrounded to form a cavity with openings at both ends, the cover body covers the opening, the electrode terminals are arranged on the cover body, at least one shell wall is provided with a heat exchange channel, and the plurality of shell walls are an integrally formed structure, which not only makes the shell composed of the plurality of shell walls have good overall structural strength, but also makes the processing and manufacturing of the shell convenient.

[0013] According to the battery cells provided in some embodiments of the present application, the shell wall includes two first walls opposite to each other in a first direction and two second walls opposite to each other in a second direction, the first direction and the second direction are perpendicular to each other, the area of ​​the surface of the first wall facing away from the cavity is larger than the area of ​​the surface of the second wall facing away from the cavity, and a heat exchange channel is provided in at least one of the first walls, so that the heat exchange channel is provided in the shell wall with a larger area, which is beneficial to improving the heat exchange efficiency of the shell, thereby improving the heat exchange effect of the battery cell.

[0014] According to the battery cells provided in some embodiments of the present application, the shell is made by an extrusion molding process, which not only makes the shell have good overall structural strength, but also helps to improve the production efficiency of the shell.

[0015] According to the battery cells provided in some embodiments of the present application, the current collector includes interconnected joints and walls, the walls form a collecting cavity, the collecting cavity is connected to the heat exchange channel, and the collecting cavity is connected to the heat exchange pipeline through the joint, so that multiple heat exchange channels in the wall can be connected to the heat exchange pipeline.

[0016] According to the battery cells provided in some embodiments of the present application, the current collector has an interface connected to the current collecting cavity, a portion of the wall is inserted into the interface and connected to the wall, and the heat exchange channel in the wall inserted into the interface is connected to the current collecting cavity.

[0017] According to the battery cells provided in some embodiments of the present application, the current collectors are arranged in pairs, and the two current collectors in each pair of current collectors are respectively connected to the two ends of the heat exchange flow channel, and one is used to pass the heat exchange medium, and the other is used to discharge the heat exchange medium; the multiple heat exchange flow channels are divided into multiple flow channel groups, and the current collecting cavity includes a first cavity and a second cavity, the first cavity is connected to the joint, and the second cavity connects two adjacent flow channel groups. By dividing the multiple heat exchange flow channels into multiple flow channel groups, the flow directions of the heat exchange flow channels in each flow channel group are arranged in the same way, so that the heat exchange medium can have a suitable flow path in the wall body by reasonably arranging the flow channel groups.

[0018] In a second aspect, the present application provides a battery device, which includes a box body, a heat exchange pipeline and a plurality of battery cells provided by any of the above-mentioned technical solutions, the box body forms a accommodating space, the plurality of battery cells are arranged along the thickness direction of the wall body and are arranged in the accommodating space, and the heat exchange pipeline passes heat exchange medium into the heat exchange flow channels of the plurality of battery cells.

[0019] According to the battery device provided in some embodiments of the present application, the battery device further includes a heat insulating member, and the heat insulating member is sandwiched between two adjacent battery cells.

[0020] In a third aspect, the present application provides an electrical device, which includes a battery device provided by any of the above technical solutions, and the battery device is used to provide electrical energy.

[0021] The technical solution provided by the embodiments of the present disclosure brings at least the following beneficial effects: The present application provides a battery cell, which includes an electrode assembly, a shell, an electrode terminal and a current collector. The shell forms a cavity, the electrode assembly is arranged in the cavity, the shell includes a wall body, a heat exchange channel is arranged in the wall body, the heat exchange channel is used to pass a heat exchange medium, a plurality of heat exchange channels are provided, and the plurality of heat exchange channels are arranged at intervals; the electrode terminal is arranged in the shell and electrically connected to the electrode assembly, the current collector is connected to the wall body, and the current collector is used to connect the plurality of heat exchange channels with the heat exchange pipeline. In the above structure, since the heat exchange channel for passing a heat exchange medium is arranged in the wall body of the shell, the heat exchange medium flowing through the wall body can directly exchange heat with the battery cell, shortening the heat transfer path between the heat exchange medium and the battery cell, improving the heat exchange effect of the battery cell, and facilitating the temperature of the battery cell to remain stable.

[0022] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0024] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application; Figure 2 An exploded view of a battery device provided in some embodiments of the present application; Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application; Figure 4 A disassembled diagram of a battery cell provided in some embodiments of the present application; Figure 5 A disassembled diagram of a battery cell provided in some other embodiments of the present application; Figure 6 A left side view of a housing of a battery cell provided in some embodiments of the present application; Figure 7 A left side view of a housing of a battery cell provided in some other embodiments of the present application; Figure 8 A schematic diagram of the structure of a current collector of a battery cell provided in some embodiments of the present application; Fig. 9A top view of a battery cell provided in some embodiments of the present application; Fig.10 for Fig. 9 Sectional view at DD in the middle; Fig.11 for Figure 8 Sectional view at CC; Fig.12 A schematic diagram of the structure of a portion of a battery device provided in some embodiments of the present application; Fig.13 This is a disassembled diagram of a portion of a battery device provided in some embodiments of the present application.

[0025] In the attached picture: 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor; 5. Box; 5a. First box part; 5b. Second box part; 5c. Accommodation space; 7. Battery cell; 72. Shell; 721. Shell; 7211. Enclosure; 72111. First part; 72112. Second part; 7212. Heat exchange part; 7213. Shell wall; 72131. First wall; 72132. Second wall; 722. Cover; 723. Wall; 7231. Heat exchange channel; 73. Electrode terminal; 74. Receptacle; 741. Opening; 75. Collector; 751. Joint; 752. Collector wall; 753. Collector cavity; 7531. First cavity; 7532. Second cavity; 754. Interface; 8. Heat insulation; 9. Heat exchange pipeline. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0027] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0028] In the description of 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", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0029] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), unless otherwise clearly and specifically defined.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0031] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields.

[0033] The battery device mentioned in the embodiments of the present application refers to a single physical module including one or more battery cell assemblies to provide higher voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar.

[0034] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0035] The battery cell may be a secondary battery cell, which refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0036] The battery cells may be lithium-ion battery cells, sodium-ion battery cells, sodium-lithium-ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium-sulfur battery cells, magnesium-ion battery cells, nickel-hydrogen battery cells, nickel-cadmium battery cells, lead-acid battery cells, etc.

[0037] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0038] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0039] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0040] In some embodiments, the battery device may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0041] In some embodiments, the battery device may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0042] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0043] In some embodiments, the battery device may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0044] Battery cells usually generate heat when working, causing the temperature of the battery cells and the surrounding environment to rise. Thermal management components such as heat exchangers are usually installed in battery devices to exchange heat with battery cells to control the temperature. Usually, the heat exchangers are bonded to the outer surface of the battery cells by gluing so that the heat exchangers can exchange heat with the battery cells. Since the heat needs to pass through the adhesive during the transfer process, the heat exchange efficiency of this method is not high, which is not conducive to keeping the temperature of the battery cells stable.

[0045] In order to improve the heat exchange effect of the battery cell and keep the temperature of the battery cell stable, the present application provides a battery cell, which includes an electrode assembly, a shell and an electrode terminal. The shell forms a cavity, and the electrode assembly is arranged in the cavity. The shell includes a wall body, and a heat exchange flow channel is provided in the wall body. The heat exchange flow channel is used to pass a heat exchange medium; the electrode terminal is arranged in the shell and electrically connected to the electrode assembly. In the above structure, since the heat exchange flow channel for passing a heat exchange medium is provided in the wall body of the shell, the heat exchange medium flowing through the wall body can directly exchange heat with the battery cell, shortening the heat transfer path between the heat exchange medium and the battery cell, improving the heat exchange effect of the battery cell, and facilitating keeping the temperature of the battery cell stable.

[0046] The battery cells described in the embodiments of the present application are suitable for use in battery devices and electrical devices using the battery devices.

[0047] Electrical devices may be vehicles, ships, spacecraft, electric toys, electric tools, etc. Vehicles may be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include aircraft, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0048] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0049] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0050] like Figure 1 As shown, a battery device 2 is disposed inside the vehicle 1, and the battery device 2 may be disposed at the bottom, head, or tail of the vehicle 1. The battery device 2 may be used to power the vehicle 1, for example, the battery device 2 may be used as an operating power source for the vehicle 1.

[0051] The vehicle 1 may further include a controller 3 and a motor 4 , wherein the controller 3 is used to control the battery device 2 to supply power to the motor 4 , for example, to meet the power requirements of starting, navigating and driving the vehicle 1 .

[0052] In some embodiments of the present application, the battery device 2 can not only serve as an operating power source for the vehicle 1, but also serve as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0053] Figure 2 This is a schematic diagram of the disassembled structure of a battery device provided in some embodiments of the present application. Figure 2 As shown, the battery device 2 includes a housing 5 and a battery cell 7, and the battery cell 7 is accommodated in the housing 5. The battery cell 7 may be the smallest unit constituting the battery.

[0054] The box 5 is used to accommodate the battery cell 7, and the box 5 can be of various structures. In some embodiments, the box 5 can include a first box portion 5a and a second box portion 5b, the first box portion 5a and the second box portion 5b cover each other, and the first box portion 5a and the second box portion 5b jointly define a storage space 5c for accommodating the battery cell 7. The second box portion 5b can be a hollow structure with one end open, the first box portion 5a is a plate-like structure, and the first box portion 5a covers the open side of the second box portion 5b to form a box 5 with a storage space 5c; the first box portion 5a and the second box portion 5b can also be hollow structures with one side open, and the open side of the first box portion 5a covers the open side of the second box portion 5b to form a box 5 with a storage space 5c. Of course, the first box portion 5a and the second box portion 5b can be of various shapes, such as a cylinder, a cuboid, etc.

[0055] In order to improve the sealing performance after the first box body part 5a and the second box body part 5b are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body part 5a and the second box body part 5b.

[0056] Assuming that the first box body portion 5a covers the top of the second box body portion 5b, the first box body portion 5a can also be called an upper box cover, and the second box body portion 5b can also be called a lower box.

[0057] In the battery device 2, the battery cell 7 can be one or more. If there are more than one battery cell 7, the battery cells 7 can be connected in series, in parallel or in mixed connection. Mixed connection means that the battery cells 7 are both connected in series and in parallel. The battery cells 7 can be directly connected in series, in parallel or in mixed connection, and then the whole formed by the battery cells 7 can be accommodated in the box 5; of course, the battery cells 7 can also be connected in series, in parallel or in mixed connection to form a battery module, and then the battery modules can be connected in series, in parallel or in mixed connection to form a whole, and then accommodated in the box 5.

[0058] Some embodiments of the present application provide a battery cell 7, referring to Figure 3 and Figure 5The battery cell 7 includes an electrode assembly (not shown in the figure), a shell 72, an electrode terminal 73 and a current collector 75. The shell 72 forms a cavity 74, and the electrode assembly is arranged in the cavity 74. The shell 72 includes a wall body 723, and a heat exchange channel 7231 is provided in the wall body 723. The heat exchange channel 7231 is used to pass a heat exchange medium. There are multiple heat exchange channels 7231, and the multiple heat exchange channels 7231 are arranged at intervals; the electrode terminal 73 is arranged in the shell 72 and electrically connected to the electrode assembly. The current collector 75 is connected to the wall body 723, and the current collector 75 is used to make the multiple heat exchange channels 7231 communicate with the heat exchange pipeline 9.

[0059] The shell 72 may be a component in the battery cell 7 for enclosing a sealed space, which can form a sealed cavity 74 for accommodating other components such as an electrode assembly and electrolyte in the battery cell 7. The wall 723 is a partial wall 723 structure in the shell 72, which is used to enclose the cavity 74 in the shell 72. Exemplarily, along the thickness direction of the wall 723, the wall 723 has a first surface and a second surface opposite to each other, the first surface faces the cavity 74 and can directly contact the components in the cavity 74, and the second surface is arranged to face the outside.

[0060] Exemplarily, the housing 72 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing 72 ), or an aluminum-plastic film, etc.

[0061] As an example, the battery cell 7 may be a cylindrical battery cell 7, a prismatic battery cell 7 or a battery cell 7 of other shapes. The prismatic battery cell 7 includes a square shell battery cell 7, a blade-shaped battery cell 7, a polygonal battery, such as a hexagonal battery.

[0062] The heat exchange channel 7231 may be a channel through which a heat exchange medium can be circulated. By providing the heat exchange channel 7231 in the wall body 723, the heat exchange medium can be circulated into the wall body 723 through the heat exchange channel 7231, so that the wall body 723 can maintain a temperature difference with the device in the cavity 74, so that the wall body 723 can continuously and efficiently exchange heat with the device in the cavity 74.

[0063] By arranging a plurality of heat exchange channels 7231 at intervals in the wall body 723 , a heat exchange medium can flow into the wall body 723 at a larger flow rate, which is beneficial to improving the heat exchange capacity between the wall body 723 and the components in the cavity 74 , and further improving the heat exchange effect of the battery cell 7 .

[0064] Exemplarily, the plurality of heat exchange channels 7231 are arranged at equal intervals. By arranging the plurality of heat exchange channels 7231 in the wall body 723 at equal intervals, the heat exchange effect in the area of ​​the wall body 723 where the heat exchange channels 7231 are arranged is uniform.

[0065] Exemplarily, a heat exchange channel 7231 may be provided in a part of the wall 723, so that the heat exchange medium circulating in the heat exchange channel 7231 can exchange heat with the battery cell 7; or a heat exchange channel 7231 may be provided in the entire wall 723, so that the heat exchange medium circulating in the heat exchange channel 7231 can exchange heat with the battery cell 7.

[0066] By setting a heat exchange channel 7231 in the wall body 723, the wall body 723 is integrated with a heat exchange function, so that there is no need to connect a heat exchange component with a heat exchange function to the wall body 723 to exchange heat with the device in the cavity 74 of the battery cell 7, so that the heat exchange medium flowing through the wall body 723 can directly exchange heat with the battery cell 7, shortening the heat transfer path between the heat exchange medium and the battery cell 7, which is beneficial to improving the heat exchange effect.

[0067] The electrode assembly is a component in the battery cell 7 where electrochemical reactions occur. The electrode assembly includes a positive electrode and a negative electrode. During the charge and discharge process of the battery cell 7, active ions (such as lithium ions) are embedded and removed back and forth between the positive electrode and the negative electrode, which generates heat. In the present application, the heat generated by the electrode assembly will be transferred to the wall 723 of the housing 72, and the heat exchange medium in the heat exchange flow channel 7231 can exchange heat with the wall 723, taking away the heat, so that the temperature of the battery cell 7 remains stable.

[0068] The electrode terminal 73 is a component used to electrically connect to an electrical device or a charging device outside the battery cell 7 so that the battery cell 7 can be charged and discharged. It is arranged on the housing 72 and electrically connected to the electrode assembly. The electrode terminal 73 may include but is not limited to a cylindrical structure, an elliptical cylindrical structure, etc., and those skilled in the art may arrange it according to actual conditions.

[0069] The collector 75 can be a device for connecting the heat exchange pipeline 9 with multiple heat exchange channels 7231 in the wall body 723. It can not only collect the heat exchange medium in the multiple heat exchange channels 7231 in the wall body 723, but also connect the heat exchange channels 7231 with the heat exchange pipeline 9, so as to facilitate the heat exchange medium to enter or discharge from the wall body 723.

[0070] In the above structure, since a heat exchange channel 7231 for passing a heat exchange medium is provided in the wall 723 of the outer shell 72, the heat exchange medium flowing through the wall 723 can directly exchange heat with the components in the battery cell 7 cavity 74, thereby shortening the heat transfer path between the heat exchange medium and the battery cell 7, improving the heat exchange effect of the battery cell 7, and facilitating maintaining the temperature of the battery cell 7 stable.

[0071] In some embodiments, reference Figure 3The housing 72 includes a housing 721 and a cover 722, wherein the housing 721 is configured as a wall 723. Figure 6 The shell 721 includes an enclosure portion 7211 and a heat exchange portion 7212, the heat exchange channel 7231 is arranged in the heat exchange portion 7212, the enclosure portion 7211 surrounds a cavity 74 with an opening 741 at at least one end, the cover body 722 covers the opening 741, the electrode terminal 73 is arranged on the cover body 722, and the heat exchange portion 7212 is connected to the side of the enclosure portion 7211 away from the cavity 74.

[0072] The shell 721 and the cover 722 may be different structural parts in the housing 72. The enclosure 7211 and the heat exchange part 7212 are different structural parts in the shell 721, wherein the enclosure 7211 is a part of the shell 721 for enclosing a cavity 74 having an opening 741 at at least one end, and the cover 722 is connected to the enclosure 7211 and sealed to cover the opening 741, so that the cavity 74 is a sealed space to accommodate components such as the electrode assembly and the electrolyte; the heat exchange part 7212 is a part of the shell 721 for setting the heat exchange flow channel 7231, and the heat exchange part 7212 is connected to the side of the enclosure 7211 away from the cavity 74, so that the heat exchange part 7212 is arranged on the outside of the enclosure 7211, which can reduce the possibility of interference with the enclosure 7211 during the process of the cover 722 covering the opening 741, which is conducive to the convenience of installation of the battery cell 7.

[0073] The cover body 722 covers the opening 741 , and the cover body 722 may be connected to the enclosing portion 7211 by welding and seals the opening 741 .

[0074] The electrode terminal 73 is disposed on the cover 722, which may mean that the cover 722 is provided with a through hole penetrating along the thickness direction of the cover 722, part of the electrode terminal 73 passes through the through hole and extends into the cavity 74 to be electrically connected to the electrode assembly, and part of the electrode terminal 73 extends out of the cover 722 to be electrically connected to an external device. By disposing the electrode terminal 73 on the cover 722, the electrode terminal 73 will not affect the arrangement of the heat exchange flow channel 7231 in the shell 721.

[0075] In some embodiments, both opposite ends of the cavity 74 have openings 741 , and the heat exchange portion 7212 and the enclosure portion 7211 are an integrally formed structure.

[0076] The heat exchange part 7212 and the enclosure part 7211 are an integrally formed structure, which may mean that the heat exchange part 7212 and the enclosure part 7211 are manufactured by an integrally formed process, which not only makes the shell 721 composed of the heat exchange part 7212 and the enclosure part 7211 have good overall structural strength, but also makes the shell 721 easy to manufacture. By making the opposite ends of the cavity 74 have openings 741, the structure of the shell 721 is symmetrical, and the heat exchange part 7212 and the enclosure part 7211 can be manufactured by an integrally formed processing method such as an extrusion process, so that the heat exchange part 7212 and the enclosure part 7211 can be manufactured synchronously as a whole, which not only makes the shell 721 easy to manufacture, but also makes the overall structure of the shell 721 have good strength; the heat exchange part 7212 and the enclosure part 7211 can be manufactured by machining a whole piece of blank by machining methods such as milling and drilling, so that the shell 721 has a lower processing difficulty.

[0077] In some embodiments, reference Figure 4 , along the direction of the opening 741 , the heat exchange portion 7212 extends out of the enclosing portion 7211 .

[0078] The heat exchange portion 7212 extends out of the enclosure portion 7211 along the direction of the opening 741. The heat exchange portion 7212 may protrude from the opening 741 toward the outside of the enclosure portion 7211 along the direction of the opening 741, so that the interface 754 of the heat exchange channel 7231 in the heat exchange portion 7212 extends out of the cover body 722, so that the interface 754 of the heat exchange channel 7231 can be more conveniently connected to the external heat exchange pipeline 9, which is beneficial to the assembly convenience of the battery device 2 including the battery cell 7.

[0079] In some embodiments, the heat exchange portion 7212 extends out of the enclosing portion 7211 along a direction perpendicular to the thickness direction of the enclosing portion 7211 .

[0080] The heat exchange portion 7212 extends out from the enclosure portion 7211 in a direction perpendicular to the thickness direction of the enclosure portion 7211, which may mean that the heat exchange portion 7212 protrudes out of the enclosure portion 7211 in a planar extension direction perpendicular to the thickness direction of the enclosure portion 7211, so that the heat exchange portion 7212 has a larger extension area, which is beneficial to improving the heat exchange capacity between the heat exchange portion 7212 and the enclosure portion 7211 and the surrounding environment.

[0081] In some embodiments, the enclosing portion 7211 includes two first portions and two second portions, the two first portions are arranged opposite to each other along a first direction, the two second portions are arranged opposite to each other along a second direction, the first direction and the second direction are perpendicular to each other, the second portions are connected between the first portions, the area of ​​the surface of the first portion facing away from the cavity 74 is larger than the area of ​​the surface of the second portion facing away from the cavity 74, and the heat exchange portion 7212 is connected to the first portion.

[0082] By making the enclosure 7211 include two first parts arranged oppositely in the first direction and two second parts arranged oppositely in the second direction, and making the second parts connected between the first parts, the first parts and the second parts form the enclosure 7211 to enclose the cavity 74. By making the first direction and the second direction perpendicular to each other, the first part and the second part can be neatly arranged, so that the heat exchange part 7212 can be conveniently arranged on the outer surface of the enclosure 7211.

[0083] By setting the area of ​​the surface of the first part away from the cavity 74 to be larger than the area of ​​the surface of the second part away from the cavity 74, and connecting the heat exchange part 7212 to the first part, the heat exchange part 7212 is arranged on a portion of the enclosure part 7211 with a larger area, which is beneficial for the heat exchange part 7212 to have a larger area to be able to set more heat exchange channels 7231, which helps to improve the heat exchange efficiency of the heat exchange part 7212, thereby improving the heat exchange effect of the battery cell 7.

[0084] In some embodiments, reference Figure 7 The outer shell 72 includes a shell 721 and a cover 722. The shell 721 is configured as a wall body 723. The shell 721 includes a plurality of shell walls 7213. The plurality of shell walls 7213 are sequentially connected and surrounded to form a cavity 74 with openings 741 at both ends. The cover 722 covers the opening 741. The electrode terminal 73 is arranged on the cover 722. A heat exchange channel 7231 is provided in at least one shell wall 7213. The plurality of shell walls 7213 are an integrally formed structure.

[0085] The shell 721 and the cover 722 are different structural parts in the outer shell 72, wherein the shell 721 is used to enclose a cavity 74 with openings 741 at both ends, and the cover 722 is used to be connected to the shell 721 and sealably cover the openings 741 to form a sealed space in the cavity 74.

[0086] The shell wall 7213 may be a structural part in the shell 721. The shell 721 includes a plurality of shell walls 7213, which are sequentially connected and surround a cavity 74 with openings 741 at both ends.

[0087] At least one shell wall 7213 is provided with a heat exchange channel 7231, which may mean that a shell wall 7213 is provided with a heat exchange channel 7231, so that the heat exchange medium can circulate through the shell wall 7213 to exchange heat with the battery cell 7; it may also mean that two or more shell walls 7213 are provided with a heat exchange channel 7231, so that the heat exchange medium can circulate through two or more shell walls 7213 to exchange heat with the battery cell 7.

[0088] The cover body 722 covers the opening 741 , and the cover body 722 may be connected to the housing 721 by welding and seals the opening 741 .

[0089] The electrode terminal 73 is disposed on the cover 722, which may mean that the cover 722 is provided with a through hole penetrating along the thickness direction of the cover 722, part of the electrode terminal 73 passes through the through hole and extends into the cavity 74 to be electrically connected to the electrode assembly, and part of the electrode terminal 73 extends out of the cover 722 to be electrically connected to an external device. By disposing the electrode terminal 73 on the cover 722, the electrode terminal 73 will not affect the arrangement of the heat exchange channel 7231 in the shell wall 7213.

[0090] The multiple shell walls 7213 are an integrally formed structure, which may mean that the multiple shell walls 7213 are manufactured by an integrally formed process, which not only makes the shell 721 composed of the multiple shell walls 7213 have good overall structural strength, but also makes the shell 721 easy to manufacture. The multiple shell walls 7213 can be manufactured by an integrally formed processing method such as an extrusion process, so that the multiple shell walls 7213 can be manufactured as a whole synchronously, which not only makes the shell 721 easy to manufacture, but also makes the overall structure of the shell 721 have good strength; the multiple shell walls 7213 can be manufactured by machining a whole piece of blank by machining methods such as milling and drilling, so that the shell 721 has a lower processing difficulty.

[0091] In some embodiments, the shell wall 7213 includes two first walls opposite to each other along a first direction and two second walls opposite to each other along a second direction, the first direction and the second direction are perpendicular to each other, the area of ​​the surface of the first wall facing away from the cavity 74 is greater than the area of ​​the surface of the second wall facing away from the cavity 74, and a heat exchange channel 7231 is provided in at least one of the first walls.

[0092] By making the shell wall 7213 include two first walls arranged oppositely in the first direction and two second walls arranged oppositely in the second direction, and connecting the second walls between the first walls, the first walls and the second walls enclose the cavity 74. By making the first direction and the second direction perpendicular to each other, the first wall and the second wall can be neatly arranged, which is convenient for heat dissipation between the shell 721 and the external device.

[0093] By setting the area of ​​the surface of the first wall away from the cavity 74 to be larger than the area of ​​the surface of the second wall away from the cavity 74, and providing a heat exchange channel 7231 in at least one first wall, a heat exchange channel 7231 is provided in the shell wall 7213 with a larger area, which is beneficial to improving the heat exchange efficiency of the shell 721, thereby improving the heat exchange effect of the battery cell 7.

[0094] In some embodiments, the housing 721 is made using an extrusion molding process.

[0095] The shell 721 is made by an extrusion molding process, which may mean that the shell 721 is formed by an extrusion molding process, which not only makes the shell 721 have good overall structural strength, but also helps to improve the production efficiency of the shell 721.

[0096] Exemplarily, the shell 721 may be made of an aluminum alloy material, so that the shell 721 has good structural strength and good heat transfer capability, which is beneficial to improving the heat exchange effect of the battery cell 7 .

[0097] In some embodiments, reference Figure 8 The collector 75 includes a joint 751 and a collector wall 752 that are connected to each other. The collector wall 752 forms a collector cavity 753 . The collector cavity 753 is connected to the heat exchange flow channel 7231 . The collector cavity 753 is connected to the heat exchange pipeline 9 through the joint 751 .

[0098] The joint 751 may be a structure in the collector 75 for connecting with the heat exchange pipeline 9 , and the collector wall 752 may be a main structure in the collector 75 , which is used to enclose a collector cavity 753 that can converge multiple heat exchange channels 7231 .

[0099] The manifold 753 is a cavity structure in the collector 75 . The manifold 753 is connected to the multiple heat exchange channels 7231 and is connected to the heat exchange pipeline 9 through the joint 751 , so that the multiple heat exchange channels 7231 in the wall 723 can be connected to the heat exchange pipeline 9 .

[0100] In some embodiments, the current collector 75 has an interface 754 connected to the current collecting cavity 753 , a portion of the wall 723 is inserted into the interface 754 and connected to the current collecting wall 752 , and the heat exchange channel 7231 in the wall 723 inserted into the interface 754 is connected to the current collecting cavity 753 .

[0101] The interface 754 can be a structure in the collector 75 for connecting with the wall body 723. It is connected with the collecting cavity 753 so that after part of the wall body 723 is inserted into the interface 754 and connected with the collecting wall 752, the heat exchange channel 7231 in the wall body 723 can be connected with the heat exchange pipeline 9 through the interface 754, the collecting cavity 753 and the interface 754.

[0102] Part of the wall body 723 is inserted into the interface 754 and connected to the current collecting wall 752, which may mean that the end of the wall body 723 is inserted into the interface 754 and sealed. For example, the end of the wall body 723 may be inserted into the interface 754 and sealed with the inner wall of the interface 754 by a sealant, so that the end of the wall body 723 can be sealed and connected to the interface 754; or the end of the wall body 723 is inserted into the interface 754 and welded to the inner wall of the interface 754, so that the end of the wall body 723 can be sealed and connected to the interface 754. Since welding can melt the materials at the wall body 723 and the interface 754 together, the welding of the wall body 723 and the interface 754 is conducive to improving the firmness of the connection between the wall body 723 and the current collector 75.

[0103] In some embodiments, reference Fig. 9 The current collectors 75 are arranged in pairs, and the two current collectors 75 in each pair of current collectors 75 are respectively connected to the two ends of the heat exchange flow channel 7231, and one is used to pass the heat exchange medium, and the other is used to discharge the heat exchange medium; Fig.10 , multiple heat exchange channels 7231 are divided into multiple channel groups, refer to Fig.11 The manifold 753 includes a first cavity 7531 and a second cavity 7532 . The first cavity 7531 is connected to the joint 751 , and the second cavity 7532 connects two adjacent flow channel groups.

[0104] By arranging the collectors 75 in pairs and connecting the two collectors 75 in each pair of collectors 75 to the two ends of the heat exchange channel 7231 respectively, one collector 75 in each pair of collectors 75 can allow heat exchange medium to be introduced from one end of the heat exchange channel 7231, and the other collector 75 can discharge heat exchange medium from the other end of the heat exchange channel 7231, so that heat exchange medium can be circulated in the heat exchange channel 7231, so that the wall body 723 can maintain the temperature difference with the device in the cavity 74, and the wall body 723 can continuously and efficiently exchange heat with the device in the cavity 74.

[0105] The flow channel group may include at least one heat exchange flow channel 7231. By dividing the plurality of heat exchange flow channels 7231 into a plurality of flow channel groups, the flow directions of the heat exchange flow channels 7231 in each flow channel group are arranged in the same manner, so that the heat exchange medium can have a suitable flow path in the wall body 723 by reasonably arranging the flow channel groups in the wall body 723.

[0106] The first cavity 7531 and the second cavity 7532 are different parts of the manifold 753. The second cavity 7532 connects the heat exchange channels 7231 in two adjacent channel groups, so that the heat exchange medium can flow between the two adjacent channel groups. The first cavity 7531 connects the second cavity 7532 and the interface 754, so that the heat exchange medium in the second cavity 7532 can be discharged to the heat exchange pipeline 9 through the interface 754, or the heat exchange medium in the heat exchange pipeline 9 can be passed into the second cavity 7532 through the interface 754.

[0107] Exemplarily, the multiple heat exchange channels 7231 in the wall body 723 can be divided into three channel groups arranged along a first direction, and the first direction is perpendicular to the thickness direction of the wall body 723 and the direction of the opening 741. One current collector 75 in each pair of current collectors 75 connects two adjacent channel groups in the three channel groups, and the other current collector 75 connects the other two adjacent channel groups in the three channel groups, so that the flow path of the heat exchange medium in the wall body 723 is S-shaped.

[0108] Some embodiments of the present application also provide a battery device 2, referring to Fig.12 and Fig.13 The battery device 2 includes a box body 5, a heat exchange pipeline 9 and a plurality of battery cells 7 provided by the above technical solution. The box body 5 forms a storage space 5c. The plurality of battery cells 7 are arranged along the thickness direction of the wall body 723 and are arranged in the storage space 5c. The heat exchange pipeline 9 passes heat exchange medium into the heat exchange flow channels 7231 of the plurality of battery cells 7.

[0109] The box body 5 may refer to the outer wall structure of the battery device 2, which forms a housing space 5c, and the housing space 5c is used to protect the battery cells 7 and the heat exchange pipeline 9 and other components therein. The heat exchange pipeline 9 may refer to a pipeline for conveying heat exchange medium to the heat exchange flow channel 7231 of the battery cell 7. By connecting the heat exchange pipeline 9 with the heat exchange flow channels 7231 of multiple battery cells 7, the heat exchange pipeline 9 can circulate the heat exchange medium into the multiple battery cells 7.

[0110] By arranging the plurality of battery cells 7 along the thickness direction of the wall body 723 , the plurality of battery cells 7 can be arranged relatively densely in the accommodation space 5 c .

[0111] Since the battery device 2 includes the battery cell 7 provided by the above technical solution, the temperature inside the battery device 2 can be kept stable and has good stability.

[0112] In some embodiments, the battery device 2 further includes a heat insulating member 8 , which is sandwiched between two adjacent battery cells 7 .

[0113] The heat insulating member 8 may be a component with heat insulating capability. By sandwiching the heat insulating member 8 between two adjacent battery cells 7, the heat insulating member 8 can isolate the heat transfer between the two adjacent battery cells 7, so that the heat generated by the battery cell 7 when thermal runaway occurs is not easily diffused to the adjacent battery cell 7, which is beneficial to improving the reliability of the battery device 2.

[0114] Exemplarily, the heat insulating member 8 may be made of heat insulating materials such as mica sheets.

[0115] In some embodiments, some embodiments of the present application further provide an electrical device, which includes the battery device 2 provided by the above technical solution, and the battery device 2 is used to provide electrical energy.

[0116] The present application provides a battery cell 7, which includes an electrode assembly, a shell 72 and an electrode terminal 73. The shell 72 includes a shell 721 and a cover 722. The shell 721 is configured as a wall 723. The shell 721 includes an enclosure 7211 and a heat exchange portion 7212. The enclosure 7211 encloses a cavity 74 with openings 741 at both ends. The heat exchange portion 7212 is connected to a side of the enclosure 7211 away from the cavity 74 and is provided with a plurality of heat exchange channels 7231. The heat exchange portion 7212 and the enclosure 7211 are integrally formed by an extrusion molding process. The electrode terminal 73 is arranged on the cover 722 and is electrically connected to the electrode assembly.

[0117] In the above structure, since a heat exchange channel 7231 for passing a heat exchange medium is provided in the wall 723 of the outer shell 72, the heat exchange medium flowing through the wall 723 can directly exchange heat with the battery cell 7, thereby shortening the heat transfer path between the heat exchange medium and the battery cell 7, improving the heat exchange effect of the battery cell 7, and facilitating maintaining the temperature of the battery cell 7 stable.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell, characterized in that: include: Electrode assembly; The outer shell forms a cavity, the electrode assembly is arranged in the cavity, the outer shell includes a wall body, a heat exchange flow channel is arranged in the wall body, and the heat exchange flow channel is used to pass a heat exchange medium; a plurality of heat exchange flow channels are provided, and the plurality of heat exchange flow channels are arranged at intervals; an electrode terminal, disposed on the housing and electrically connected to the electrode assembly; A current collector is connected to the wall body, and is used to connect the plurality of heat exchange channels to the heat exchange pipeline.

2. The battery cell according to claim 1, characterized in that: The outer shell includes a shell and a cover body, the shell is configured as the wall body, the shell includes an enclosure portion and a heat exchange portion, the heat exchange flow channel is arranged in the heat exchange portion, the enclosure portion encloses the cavity having an opening at least at one end, the cover body covers the opening, the electrode terminal is arranged on the cover body, and the heat exchange portion is connected to a side of the enclosure portion away from the cavity.

3. The battery cell according to claim 2, characterized in that: The two opposite ends of the cavity are provided with the openings, and the heat exchange portion and the enclosure portion are an integrally formed structure.

4. The battery cell according to claim 2, characterized in that: Along the direction of the opening, the heat exchange portion extends out of the enclosing portion.

5. The battery cell according to claim 2, characterized in that: The heat exchange portion extends out of the enclosure portion along a direction perpendicular to the thickness direction of the enclosure portion.

6. The battery cell according to claim 2, characterized in that: The enclosed portion includes two first portions and two second portions, the two first portions are arranged opposite to each other along a first direction, the two second portions are arranged opposite to each other along a second direction, the first direction and the second direction are perpendicular to each other, the second portions are connected between the first portions, the area of ​​the surface of the first portion facing away from the cavity is larger than the area of ​​the surface of the second portion facing away from the cavity, and the heat exchange portion is connected to the first portion.

7. The battery cell according to claim 1, characterized in that: The outer shell includes a shell and a cover body, the shell is configured as the wall body, the shell includes a plurality of shell walls, the plurality of shell walls are sequentially connected and surrounded to form the cavity with openings at both ends, the cover body covers the openings, the electrode terminal is arranged on the cover body, at least one of the shell walls is provided with the heat exchange channel, and the plurality of shell walls are an integrally formed structure.

8. The battery cell according to claim 7, characterized in that: The shell wall includes two first walls opposite to each other along a first direction and two second walls opposite to each other along a second direction, the first direction and the second direction are perpendicular to each other, the area of ​​the surface of the first wall facing away from the cavity is larger than the area of ​​the surface of the second wall facing away from the cavity, and the heat exchange channel is provided in at least one of the first walls.

9. The battery cell according to claim 3 or 7, characterized in that: The shell is made by adopting an extrusion molding process.

10. The battery cell according to claim 1, characterized in that: The current collector includes a joint and a wall body connected to each other, the wall body encloses a collecting cavity, the collecting cavity is connected to the heat exchange flow channel, and the collecting cavity is connected to the heat exchange pipeline through the joint.

11. The battery cell according to claim 10, characterized in that: The current collector has an interface communicating with the current collecting cavity, a portion of the wall body is inserted into the interface and connected to the wall body, and the heat exchange flow channel in the wall body inserted into the interface is communicated with the current collecting cavity.

12. The battery cell according to claim 10, characterized in that: The collectors are arranged in pairs, and the two collectors in each pair of the collectors are respectively connected to the two ends of the heat exchange channel, and one is used to introduce the heat exchange medium, and the other is used to discharge the heat exchange medium; the multiple heat exchange channels are divided into multiple channel groups, and the collector cavity includes a first cavity and a second cavity, the first cavity is connected to the joint, and the second cavity connects two adjacent channel groups.

13. A battery device, characterized in that: It comprises a box body, a heat exchange pipeline and a plurality of battery cells as described in any one of claims 1-12, wherein the box body forms a storage space, the plurality of battery cells are arranged along the thickness direction of the wall body and are arranged in the storage space, and the heat exchange pipeline introduces heat exchange medium into the heat exchange flow channels of the plurality of battery cells.

14. The battery device according to claim 13, characterized in that: The battery device further includes a heat insulating member, which is sandwiched between two adjacent battery cells.

15. An electrical device, characterized in that: Comprising a battery device as claimed in claim 13 or 14, the battery device is used to provide electrical energy.

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