Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device.The battery device comprises at least two battery monomers and a connecting piece, the connecting piece comprises a confluence part and a cooling part which are connected, the confluence part is configured to be connected with pole columns on two adjacent battery monomers, and the cooling part comprises a first side wall, a second side wall and a bottom plate; the first side wall and the second side wall are oppositely arranged in the first direction, and the bottom plate is connected with the first side wall and the second side wall. Fluid runners are arranged in the first side wall, the second side wall and the bottom plate; the first side wall and the second side wall are connected with confluence parts; and the first side wall and / or the second side wall are / is attached to the side wall of the corresponding pole column. According to the scheme provided by the invention, after the confluence part is connected with the corresponding pole and the cooling liquid passes through the fluid flow channel, the confluence part and the pole can be cooled through the first side wall and the second side wall, so that heat generated by the confluence part during working can be quickly cooled, and the reliability of the whole device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] Battery packs are used to connect multiple battery cells in series, parallel or mixed connection to form a battery pack.

[0003] The heat generated by the barbecued tablets in the related technology cannot be cooled down quickly during use. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can solve the problem that the heat generated by the bar can not be cooled quickly during use.

[0005] To address the aforementioned technical problems, in a first aspect, this application proposes a battery device, comprising:

[0006] At least two battery cells;

[0007] A connector, comprising a connected busbar and a cooling section, wherein the busbar is configured to connect terminals on two adjacent battery cells;

[0008] The cooling section includes a first sidewall, a second sidewall, and a base plate. The first sidewall and the second sidewall are disposed opposite to each other along a first direction, and the base plate connects the first sidewall and the second sidewall.

[0009] Fluid channels are provided in the first sidewall, the second sidewall, and the bottom plate; the confluence portion is connected to both the first sidewall and the second sidewall.

[0010] The first sidewall and / or the second sidewall are in contact with the corresponding pole post sidewall.

[0011] In the technical solution of this application embodiment, after the manifold is connected to the corresponding pole and the coolant passes through the fluid flow channel, the manifold and pole can be cooled by the first sidewall and the second sidewall. This can quickly cool the heat generated by the manifold during operation, thereby improving the reliability of the overall device.

[0012] In some embodiments, the first sidewall and / or the second sidewall are provided with grooves, and the electrode post is at least partially embedded in the grooves. This increases the contact area between the first sidewall, the second sidewall, and the corresponding electrode post, thereby improving the cooling efficiency of the electrode post.

[0013] In some embodiments, the battery device further includes a first thermally conductive layer disposed between the electrode post and the groove.

[0014] In this way, the heat generated on the electrode can be quickly transferred to the corresponding sidewall through the first heat-conducting layer, thereby improving the cooling efficiency of the electrode.

[0015] In some embodiments, the battery device further includes a second thermally conductive layer disposed between the base plate and the upper surface of the battery cell.

[0016] In this way, the heat generated on the upper surface of the battery cell can be quickly transferred to the base plate through the second thermal conductive layer, thereby improving the cooling efficiency of the upper surface of the battery cell.

[0017] In some embodiments, the second thermally conductive layer is one of thermally conductive gel, thermally conductive double-sided adhesive, or graphene thermally conductive film, and the thickness of the second thermally conductive layer is 0.1mm-0.3mm.

[0018] When the second thermally conductive layer is less than 0.1mm, the adhesive layer is too thin and is prone to pinholes and localized missing adhesive, resulting in localized high thermal resistance points. When the second thermally conductive layer is greater than 0.3mm, the longitudinal thermal resistance of the adhesive layer increases linearly, the heat loss through the adhesive layer increases, and the thermal conductivity drops sharply. When the thickness of the second thermally conductive layer is 0.1mm-0.3mm, the longitudinal thermal resistance is extremely low and uniform, and heat can be transferred from the upper surface of the battery cell to the base plate with almost no loss, thereby improving the overall cooling efficiency.

[0019] In some embodiments, the battery device further includes an insulating layer disposed between the base plate and the upper surface of the battery cell.

[0020] In some embodiments, the battery device further includes a fastener configured to connect the busbar to the terminal. This facilitates the connection of the busbar and the terminal.

[0021] In some embodiments, the side of the base plate facing the battery cell has a rough surface. This increases the bonding area between the base plate and the battery cell.

[0022] Secondly, this application proposes an electrical device, including a battery device as described in any one of the embodiments of this application.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of an electrical device provided in some embodiments of this application;

[0026] Figure 2 for Figure 1 A schematic diagram of the battery's exploded structure;

[0027] Figure 3 for Figure 2 A schematic diagram of the exploded structure of a single battery cell in the diagram;

[0028] Figure 4 for Figure 2 Top view of a single battery cell;

[0029] Figure 5 A schematic diagram of a battery device provided for some embodiments of this application from another perspective;

[0030] Figure 6 Schematic diagrams of connectors provided for some embodiments of this application;

[0031] Figure 7 for Figure 6 Enlarged diagram of point A in the middle.

[0032] The reference numerals in the detailed embodiments are as follows:

[0033] 1000, vehicles;

[0034] 100. Battery; 200. Controller; 300. Motor; 400. Connector;

[0035] 110. Housing; 111. First part; 112. Second part; 120. Battery cell; 121. Housing; 122. End cap; 123. Electrode assembly; 124. Terminal post;

[0036] 410. Manifold; 420. Cooling section; 421. First sidewall; 422. Second sidewall; 423. Base plate; 430. Assembly hole; 440. Fluid flow channel. Detailed Implementation

[0037] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0042] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0043] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] Battery packs are used to connect multiple battery cells in series, parallel or mixed connection to form a battery pack.

[0046] The battery packs in the relevant technologies generate heat during use. Because this heat cannot be cooled quickly, the battery packs have poor current carrying capacity, which affects the reliability of the battery.

[0047] Based on the above considerations, in order to solve the problem that the heat generated by the battery tablets cannot be cooled quickly during use, a battery device is designed. The battery device includes at least two battery cells and a connector. The connector includes a connected busbar and a cooling section. The busbar is configured to connect the terminals on two adjacent battery cells. The cooling section includes a first sidewall, a second sidewall, and a base plate. The first sidewall and the second sidewall are arranged opposite to each other along a first direction. The base plate connects the first sidewall and the second sidewall. Fluid channels are provided in the first sidewall, the second sidewall, and the base plate. The busbar is connected to both the first sidewall and the second sidewall. The first sidewall and / or the second sidewall are in contact with the corresponding terminal sidewall.

[0048] In the technical solution of this application embodiment, after the manifold is connected to the corresponding pole and the coolant passes through the fluid flow channel, the manifold and pole can be cooled by the first sidewall and the second sidewall. This can quickly cool the heat generated by the manifold during operation, thereby improving the reliability of the overall device.

[0049] In this application, "battery" refers to a single physical module comprising one or more individual battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery pack, etc. Batteries can serve as a power source or power system for electrical devices, which helps improve the overall performance of the battery and facilitates its widespread adoption.

[0050] The aforementioned electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0051] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0052] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0053] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0054] Please refer to Figure 2 , Figure 2 for Figure 1 The diagram shows the exploded structure of the battery. The battery 100 includes a housing 110 and a battery cell 120, with the battery cell 120 housed within the housing 110. The housing 110 provides a space for the battery cell 120 and can have various structures. In some embodiments, the housing 110 may include a first portion 111 and a second portion 112, which overlap each other, collectively defining a space for accommodating the battery cell 120. The second portion 112 may be a hollow structure with one open end, and the first portion 111 may be a plate-like structure, covering the open side of the second portion 112 so that the first portion 111 and the second portion 112 together define the space. Alternatively, both the first portion 111 and the second portion 112 may be hollow structures with one open side, with the open side of the first portion 111 covering the open side of the second portion 112. Of course, the box 110 formed by the first part 111 and the second part 112 can be of various shapes, such as a cylinder, a cuboid, etc.

[0055] In battery 100, there can be multiple battery cells 120. These multiple battery cells 120 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 120 are connected in both series and parallel. Multiple battery cells 120 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 120 is housed within housing 110. Alternatively, battery 100 can also consist of multiple battery cells 120 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within housing 110. Battery 100 may also include other structures; for example, battery 100 may also include a busbar component for electrical connection between multiple battery cells 120.

[0056] Each battery cell 120 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 120 can be cylindrical, flat, cuboid, or other shapes.

[0057] like Figure 3 As shown, the battery cell 120 may include a housing, an electrode assembly 123, and electrode terminals. The housing includes a casing 121 and an end cap 122. The casing 121 has an opening, and the end cap 122 closes the opening to isolate the internal environment of the battery cell 120 from the external environment.

[0058] The housing 121 is an assembly used to cooperate with the end cap 122 to form the internal environment of the battery cell 120, wherein the formed internal environment can accommodate the electrode assembly 123, electrolyte, and other components. The housing 121 and the end cap 122 can be independent components. The housing 121 can have various shapes and sizes. Specifically, the shape of the housing 121 can be determined according to the specific shape and size of the electrode assembly 123. The housing 121 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0059] End cap 122 refers to a component that covers the opening of housing 121 to isolate the internal environment of battery cell 120 from the external environment. The shape of end cap 122 can be adapted to the shape of housing 121 to fit it. Optionally, end cap 122 can be made of a material with certain hardness and strength, such as aluminum alloy. This makes end cap 122 less prone to deformation under pressure and impact, allowing battery cell 120 to have higher structural strength and improved reliability. Functional components such as electrode terminals can be provided on end cap 122. Electrode terminals can be used for electrical connection with electrode assembly 123 to output or input electrical energy to battery cell 120. The material of end cap 122 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating structure can also be provided on the inner side of end cap 122. The insulating structure can be used to isolate the electrical connection components inside housing 121 from end cap 122 to reduce the risk of short circuit. For example, the insulating structure can be made of plastic, rubber, etc.

[0060] Electrode assembly 123 is the component in the battery cell 120 where electrochemical reactions occur. The housing 121 may contain one or more electrode assemblies 123. The electrode assembly 123 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets to separate them and prevent internal short circuits. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 123, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or at opposite ends. During the charging and discharging process of the battery 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop. Furthermore, the electrode assembly 123 can be a wound structure or a stacked structure.

[0061] In some embodiments, the battery cell 120 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold.

[0062] According to some embodiments of this application, such as Figure 4 and combined Figure 5 , Figure 6 , Figure 7As shown, this application provides a battery device, which includes at least two battery cells 120 and a connector 400. The connector 400 includes a connected busbar 410 and a cooling section 420. The busbar 410 is configured to connect the terminals 124 on two adjacent battery cells 120. The cooling section 420 includes a first sidewall 421, a second sidewall 422, and a base plate 423. The first sidewall 421 and the second sidewall 422 are arranged opposite to each other along a first direction. The base plate 423 connects the first sidewall 421 and the second sidewall 422. Fluid channels 440 are provided in the first sidewall 421, the second sidewall 422, and the base plate 423. The busbar 410 is connected to both the first sidewall 421 and the second sidewall 422. The first sidewall 421 and / or the second sidewall 422 are in contact with the sidewall of the corresponding terminal 124.

[0063] In this embodiment, the manifold 410 can be a bar plate and the cooling section 420 can be a cooling plate; there are no limitations on this.

[0064] refer to Figure 6 As shown, the cooling section 420 in this embodiment has an overall concave structure, and a converging section 410 is connected to both the left and right sides of the cooling section 420. The converging section 410 is integrally formed with the cooling section 420.

[0065] The first direction in this embodiment is as follows: Figure 7 The X-axis direction in the fluid flow channel 440 intersects the coolant flow direction in the fluid flow channel 440, wherein the coolant flow direction is as follows: Figure 7 The Y-axis direction in the diagram.

[0066] In this embodiment, the first sidewall 421, the second sidewall 422, and the bottom plate 423 are integrally formed to form a concave structure, and the first sidewall 421 and the second sidewall 422 are respectively connected to the confluence portion 410.

[0067] When the junction 410 is connected to the corresponding terminal 124 by bolts, the first sidewall 421 and the second sidewall 422 are in contact with the sidewall of the corresponding terminal 124, and the base plate 423 is also in contact with the upper surface of the corresponding battery cell 120. After the coolant passes through the fluid channel 440, the junction 410 and the terminal 124 can be cooled by the first sidewall 421 and the second sidewall 422. This can quickly cool the heat generated by the junction 410 during operation, thereby improving the reliability of the overall device.

[0068] According to some embodiments of this application, a groove is provided on the first sidewall 421 and / or the second sidewall 422, and the pole post 124 is at least partially embedded in the groove.

[0069] In this embodiment, grooves are provided on both the first sidewall 421 and the second sidewall 422. When the busbar 410 is connected to the corresponding pole post 124, the side portion of the pole post 124 is located in the corresponding groove. In this way, the contact area between the first sidewall 421, the second sidewall 422 and the corresponding pole post 124 can be increased, thereby improving the cooling efficiency of the pole post 124.

[0070] According to some embodiments of this application, the battery device further includes a first thermally conductive layer disposed between the electrode post 124 and the groove.

[0071] In this embodiment, the first thermally conductive layer can be a graphene layer, but this is not a limitation.

[0072] When the electrode post 124 is located in the corresponding groove, the electrode post 124 contacts the inner wall of the groove through the first heat-conducting layer, so that the heat generated on the electrode post 124 can be quickly transferred to the inner wall of the groove through the first heat-conducting layer, thereby improving the cooling efficiency of the electrode post 124.

[0073] According to some embodiments of this application, the battery device further includes a second thermally conductive layer disposed between the base plate 423 and the upper surface of the battery cell 120.

[0074] In this embodiment, the second thermally conductive layer can be a graphene layer, but this is not a limitation.

[0075] When the base plate 423 comes into contact with the upper surface of the battery cell 120, the heat generated on the upper surface of the battery cell 120 can be quickly transferred to the base plate 423 through the second heat-conducting layer, thereby improving the cooling efficiency of the upper surface of the battery cell 120.

[0076] According to some embodiments of this application, the second thermally conductive layer is one of thermally conductive gel, thermally conductive double-sided adhesive, or graphene thermally conductive film, and the thickness of the second thermally conductive layer is 0.1mm-0.3mm.

[0077] When the second thermally conductive layer is less than 0.1mm, the adhesive layer is too thin and is prone to pinholes and localized missing adhesive, resulting in localized high thermal resistance points. When the second thermally conductive layer is greater than 0.3mm, the longitudinal thermal resistance of the adhesive layer increases linearly, the heat loss through the adhesive layer increases, and the thermal conductivity drops sharply. When the thickness of the second thermally conductive layer is 0.1mm-0.3mm, the longitudinal thermal resistance is extremely low and uniform, and heat can be transferred from the upper surface of the battery cell to the base plate with almost no loss, thereby improving the overall cooling efficiency.

[0078] According to some embodiments of this application, the battery device further includes an insulating layer disposed between the base plate 423 and the upper surface of the battery cell 120.

[0079] The insulating layer in this embodiment can be a polyimide ceramic composite coating, and there is no limitation here.

[0080] During use, by providing an insulating layer between the base plate 423 and the upper surface of the battery cell 120, electrical contact between the base plate 423 and the upper surface of the battery cell 120 can be avoided.

[0081] According to some embodiments of this application, the battery device further includes a fastener configured to connect the busbar 410 to the terminal post 124.

[0082] In this embodiment, the fasteners can be bolts, connecting pins, etc., and there is no limitation here.

[0083] refer to Figure 6 As shown, in this embodiment, a mounting hole 430 is provided on the busbar 410. When the busbar 410 contacts the corresponding pole 124, a fastener passes through the corresponding mounting hole 430 and connects to the pole 124, thereby stably connecting the busbar 410 and the pole 124 together.

[0084] According to some embodiments of this application, the side of the base plate 423 facing the battery cell 120 is rough.

[0085] In this way, when the base plate 423 and the battery cell 120 are bonded together by the adhesive layer, the bonding area between the base plate 423 and the battery cell 120 can be increased under the action of the rough surface, thereby improving the bonding strength between the two.

[0086] This application also provides an electrical device, including a battery device as described in any of the embodiments of this application.

[0087] The specific structure of the battery device in this embodiment refers to the above embodiments. Since the power device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: At least two battery cells; A connector, comprising a connected busbar and a cooling section, wherein the busbar is configured to connect terminals on two adjacent battery cells; The cooling section includes a first sidewall, a second sidewall, and a base plate. The first sidewall and the second sidewall are disposed opposite to each other along a first direction, and the base plate connects the first sidewall and the second sidewall. Fluid channels are provided in the first sidewall, the second sidewall, and the bottom plate; the confluence portion is connected to both the first sidewall and the second sidewall. The first sidewall and / or the second sidewall are in contact with the corresponding pole post sidewall.

2. The battery device according to claim 1, characterized in that, The first sidewall and / or the second sidewall are provided with grooves, and the pole post is at least partially embedded in the grooves.

3. The battery device according to claim 2, characterized in that, The battery device further includes a first thermally conductive layer disposed between the electrode post and the groove.

4. The battery device according to claim 1, characterized in that, The battery device further includes a second thermally conductive layer, which is disposed between the base plate and the upper surface of the battery cell.

5. The battery device according to claim 4, characterized in that, The second thermally conductive layer is one of thermally conductive gel, thermally conductive double-sided adhesive, or graphene thermally conductive film, and the thickness of the second thermally conductive layer is 0.1mm-0.3mm.

6. The battery device according to claim 1, characterized in that, The battery device further includes an insulating layer disposed between the base plate and the upper surface of the battery cell.

7. The battery device according to any one of claims 1 to 6, characterized in that, The battery device also includes fasteners configured to connect the busbar to the terminal post.

8. The battery device according to any one of claims 1 to 6, characterized in that, The side of the base plate facing the battery cell has a rough surface.

9. An electrical device, characterized in that, Includes the battery device as described in any one of claims 1 to 8.

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