Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device.The battery device comprises a water cooling plate assembly, the water cooling plate assembly comprises a plate body, a first current collector and a second current collector, and the first current collector and the second current collector are arranged at the end of the plate body; at least one cooling flow channel is arranged in the plate body, and the first current collector and the second current collector are respectively communicated with the cooling flow channel; a first liquid inlet and a first liquid outlet are formed in the first current collector, and a second liquid inlet and a second liquid outlet are formed in the second current collector; in every two adjacent first current collectors, the front first liquid inlet is detachably connected to the rear first liquid outlet, and / or, in every two adjacent second current collectors, the front second liquid inlet is detachably connected to the rear second liquid outlet. According to the scheme provided by the invention, two adjacent first current collectors do not need to be connected through an external pipeline, and two adjacent second current collectors do not need to be connected through an external pipeline, so that the number of parts in the whole device is reduced, the structure is obviously simple, and the corresponding current collectors can be conveniently butted.

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] During battery use, the battery cells generate heat, so a water-cooling plate is needed to dissipate the heat.

[0003] The water-cooled plate in the related technology has a complex structure when in 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 of complex structure of existing water-cooled plates during use.

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

[0006] A water-cooled plate assembly, the water-cooled plate assembly including a plate body and a first current collector and a second current collector disposed at the end of the plate body;

[0007] The plate body is provided with at least one cooling channel, and the first collector and the second collector are respectively connected to the cooling channel;

[0008] The first current collector has a first inlet and a first outlet, and the second current collector has a second inlet and a second outlet.

[0009] In two adjacent first current collectors, the first first inlet is detachably connected to the second first outlet, and / or,

[0010] In two adjacent second current collectors, the first second liquid inlet is detachably connected to the second liquid outlet.

[0011] The battery device further includes a seal, which is disposed between the outer peripheral wall of the first liquid inlet and the inner wall of the first liquid outlet.

[0012] In the technical solution of this application embodiment, since the first inlet of two adjacent first manifolds can be directly connected to the second outlet, and the first second inlet of two adjacent second manifolds can be directly connected to the second outlet, there is no need to connect the two adjacent first manifolds or the two adjacent second manifolds through external pipes. This reduces the number of components in the overall device, significantly simplifies the structure, and facilitates connection of the corresponding manifolds. Furthermore, when the first inlet is inserted into the corresponding first outlet, good sealing between them can be ensured.

[0013] In some embodiments, the first current collector includes a housing component and a current collector component, the current collector component being detachably connected to the housing component, and the housing component being disposed at one end of the plate;

[0014] The flow collector has a first liquid inlet and a first liquid outlet, and the flow collector is connected to the cooling channel through the housing component.

[0015] Since the current collector is detachably connected to the housing component, it is convenient to install or remove the current collector.

[0016] In some embodiments, the housing member has an opening on the side facing the plate, a flow collection space is formed inside the housing member, and a through hole is formed on the first wall of the flow collection member;

[0017] The through hole, the flow collection space, and the cooling channel are connected.

[0018] In some embodiments, the outer peripheral wall of the first inlet is fitted to the inner wall of the corresponding first outlet. This ensures a good seal between the two when the first inlet is inserted into the corresponding first outlet.

[0019] In some embodiments, the insertion end of the first inlet is provided with a guide chamfer, and the end of the first outlet is provided with a flared structure, wherein the guide chamfer is adapted to the flared structure. This facilitates insertion of the first inlet into the corresponding first outlet.

[0020] In some embodiments, the flow collector is provided with a first channel and a second channel along the fluid flow direction;

[0021] The first channel is connected to the flow collection space through the through hole.

[0022] In this way, coolant can be supplied to the plate through the first channel, and coolant in the second channel can cool other components of the battery.

[0023] In some embodiments, the flow collector is provided with a support rib inside, and the support rib is configured to divide the interior of the flow collector into a first channel and a second channel.

[0024] The support ribs not only facilitate the separation of the first and second channels, but also ensure the strength and flatness of the flat manifold at the inlet, preventing gaps from forming at the inlet during insertion, which could lead to sealing failure.

[0025] In some embodiments, the cross-sectional profile of the current collection member is flat or circular.

[0026] In this way, when the cross-sectional profile of the current collector is flat, its overall space occupies a small area, thereby improving the utilization rate of the internal space of the battery pack and thus increasing the volumetric energy density of the battery pack.

[0027] Secondly, this application proposes an electrical device, including a battery device as described in any one of the embodiments of this application.

[0028] 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

[0029] 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:

[0030] Figure 1 This is a schematic diagram of the structure of an electrical device provided in some embodiments of this application;

[0031] Figure 2 This application provides schematic diagrams of the battery structure for some embodiments.

[0032] Figure 3 This is a schematic diagram of the structure of a battery cell provided in some embodiments of this application;

[0033] Figure 4 Schematic diagram of a water-cooled plate assembly provided in some embodiments of this application;

[0034] Figure 5 Another schematic diagram of a water-cooled plate assembly provided in some embodiments of this application;

[0035] Figure 6 A schematic diagram of a first current collector provided for some embodiments of this application;

[0036] Figure 7 A schematic diagram of the first current collector provided for some embodiments of this application from another perspective;

[0037] Figure 8 This is yet another schematic diagram of a first current collector provided for some embodiments of this application.

[0038] The reference numerals in the detailed embodiments are as follows:

[0039] 1000, vehicles;

[0040] 100. Battery; 200. Controller; 300. Motor; 400. Water-cooled plate assembly;

[0041] 110. Housing; 111. First part; 112. Second part; 120. Battery cell; 121. Housing; 122. End cap; 123. Electrode assembly;

[0042] 410. Plate; 420. First collector; 421. Shell component; 4211. Collector space; 4212. Assembly hole; 422. Collector component; 4221. First inlet; 4222. First outlet; 4223. First channel; 4224. Second channel; 4225. Support rib; 4226. Through hole; 430. Second collector. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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).

[0049] 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.

[0050] 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.

[0051] With the development of the new energy industry, energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. For electric vehicles, battery technology is a crucial factor in their development. Charging and long driving range have become the most common demands of new energy vehicles. How to improve battery energy density while simultaneously enhancing thermal management performance and reducing overall product costs is a pressing issue that needs to be addressed in battery technology.

[0052] Related technologies utilize water-cooling systems to cool batteries. These systems include water-cooling plates, current collectors, and connecting pipes. The current collectors are located at the ends of the water-cooling plates, and the connecting pipes connect current collectors on adjacent water-cooling plates. This results in a complex overall system structure and high manufacturing costs.

[0053] Based on the above considerations, in order to solve the problem of complex structure of existing water-cooled plates during use, a battery device is designed. The battery device includes a water-cooled plate assembly, which includes a plate body and a first current collector and a second current collector disposed at the end of the plate body. The plate body has at least one cooling channel, and the first current collector and the second current collector are respectively connected to the cooling channel. A first liquid inlet and a first liquid outlet are formed on the first current collector, and a second liquid inlet and a second liquid outlet are formed on the second current collector. In two adjacent first current collectors, the first first liquid inlet is detachably connected to the second first liquid outlet, and / or, in two adjacent second current collectors, the first second liquid inlet is detachably connected to the second second liquid outlet. The battery device also includes a sealing element disposed between the outer peripheral wall of the first liquid inlet and the inner wall of the first liquid outlet.

[0054] In the technical solution of this application embodiment, since the first inlet of two adjacent first current collectors can be directly connected to the second outlet, and the first second inlet of two adjacent second current collectors can be directly connected to the second outlet, there is no need to connect the two adjacent first current collectors or the two adjacent second current collectors through external pipes. This reduces the number of components in the overall device, significantly simplifies the structure, and facilitates docking with the corresponding current collectors. Simultaneously, when the first inlet is inserted into the corresponding first outlet, good sealing between them can be ensured. In this application, a battery refers to a single physical module comprising one or more 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 is beneficial for improving the overall performance of the battery and facilitating its widespread adoption.

[0055] 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.

[0056] 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.

[0057] Please refer to Figure 1 , Figure 1This 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.

[0058] 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.

[0059] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery 100 provided in some embodiments of this application. 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 accommodating space for the battery cell 120, and the housing 110 can adopt various structures. In some embodiments, the housing 110 may include a first portion 111 and a second portion 112, which overlap each other, and together define a accommodating 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, with the first portion 111 covering the open side of the second portion 112 so that the first portion 111 and the second portion 112 together define the accommodating space; alternatively, the first portion 111 and the second portion 112 may both 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 cylinder, cuboid, etc.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] According to some embodiments of this application, such as Figure 4 and combined Figure 5 , Figure 6As shown, this application provides a battery device, which includes a water-cooled plate assembly 400. The water-cooled plate assembly 400 includes a plate body 410 and a first current collector 420 and a second current collector 430 disposed at the ends of the plate body 410. The plate body 410 has at least one cooling channel inside, and the first current collector 420 and the second current collector 430 are respectively connected to the cooling channel. The first current collector 420 has a first liquid inlet 4221 and a first liquid outlet 4222, and the second current collector 430 has a second liquid inlet and a second liquid outlet. In two adjacent first current collectors 420, the first first liquid inlet 4221 is detachably connected to the second first liquid outlet 4222, and / or, in two adjacent second current collectors 430, the first second liquid inlet is detachably connected to the second second liquid outlet. The battery device also includes a sealing member disposed between the outer peripheral wall of the first liquid inlet 4221 and the inner wall of the first liquid outlet 4222.

[0068] In this embodiment, one or two cooling channels may be provided inside the plate 410. The specific channel can be determined according to the actual situation, and this embodiment does not limit this.

[0069] In this embodiment, the sealing element can be a sealing ring, and there is no limitation here.

[0070] refer to Figure 5 As shown, in this embodiment, a first current collector 420 is connected to the left side of the plate 410, and a second current collector 430 is connected to the right side of the plate 410. The structures of the first current collector 420 and the second current collector 430 are identical. (See reference...) Figure 6 As shown, the first liquid collector 420 has a first liquid inlet 4221 on the right side and a first liquid outlet 4222 on the left side. The structure of the second liquid collector 430 can refer to the structure of the first liquid collector 420, and will not be described again here.

[0071] refer to Figure 4 and combined Figure 6 As shown, after the two plates 410 on opposite sides of the large surface of the battery cell 120 are installed, the first liquid inlet 4221 can be inserted into the second liquid outlet 4222. At this time, the first liquid inlet 4221 and the second liquid outlet 4222 are sealed together. At the same time, the first second liquid inlet can be inserted into the second second liquid outlet, and the first second liquid inlet and the second second liquid outlet are sealed together. This eliminates the need to connect the two adjacent first current collectors 420 and the two adjacent second current collectors 430 through external pipes, reducing the number of parts in the overall device, making the structure significantly simpler, and facilitating the connection of the corresponding current collectors.

[0072] Meanwhile, when the first liquid inlet 4221 is inserted into the corresponding first liquid outlet 4222, the sealant can ensure a good seal between the two.

[0073] According to some embodiments of this application, such as Figure 6 As shown, the first collector 420 includes a shell component 421 and a collector component 422. The collector component 422 is detachably connected to the shell component 421, and the shell component 421 is disposed at one end of the plate 410. A first liquid inlet 4221 and a first liquid outlet 4222 are formed on the collector component 422, and the collector component 422 is connected to the cooling channel through the shell component 421.

[0074] In this embodiment, an assembly hole 4212 is provided on the housing component 421, and the current collecting component 422 can be inserted into the corresponding assembly hole 4212, which facilitates the installation or removal of the current collecting component 422.

[0075] According to some embodiments of this application, such as Figure 7 As shown, the shell component 421 has an opening on the side facing the plate 410, and a flow collection space 4211 is formed inside the shell component 421. A through hole 4226 is opened on the first wall of the flow collection component 422; wherein, the through hole 4226, the flow collection space 4211 and the cooling channel are connected.

[0076] In this embodiment, after the flow collecting component 422 is installed on the housing component 421, the corresponding through hole 4226 and flow collecting space 4211 are connected, so that the coolant can flow into the corresponding cooling channel through the first inlet 4221, through hole 4226 and flow collecting space 4211.

[0077] According to some embodiments of this application, the outer peripheral wall of the first liquid inlet 4221 is fitted to the inner wall of the corresponding first liquid outlet 4222.

[0078] In this embodiment, when the first liquid inlet 4221 is inserted into the corresponding first liquid outlet 4222, the outer peripheral wall of the first liquid inlet 4221 is in close contact with the inner wall of the corresponding first liquid outlet 4222, thus ensuring good sealing between the two.

[0079] According to some embodiments of this application, the insertion end of the first liquid inlet 4221 is provided with a guide chamfer, and the end of the first liquid outlet 4222 is provided with a flared structure, with the guide chamfer and the flared structure being adapted to each other. This facilitates the insertion of the first liquid inlet 4221 into the corresponding first liquid outlet 4222.

[0080] According to some embodiments of this application, such as Figure 6As shown, the flow collecting component 422 has a first channel 4223 and a second channel 4224 along the fluid flow direction; wherein, the first channel 4223 is connected to the flow collecting space 4211 through the through hole 4226.

[0081] In this way, coolant can be supplied to the plate 410 through the first channel 4223, and the coolant in the second channel 4224 can be used to cool other components of the battery.

[0082] According to some embodiments of this application, such as Figure 6 As shown, the flow collector 422 is provided with a support rib 4225 inside, and the support rib 4225 is configured to divide the interior of the flow collector 422 into a first channel 4223 and a second channel 4224.

[0083] In this embodiment, the support rib 4225 not only facilitates the separation of the first channel 4223 and the second channel 4224, but also ensures the strength and flatness of the flat manifold at the inlet, preventing gaps from forming at the inlet during insertion, which could lead to sealing failure.

[0084] According to some embodiments of this application, such as Figure 6 and combined Figure 8 The cross-sectional profile of the flow collector 422 is flat or circular.

[0085] In this way, when the cross-sectional profile of the current collector 422 is flat, its overall space occupies a small area, thereby improving the utilization rate of the internal space of the battery pack and thus improving the volumetric energy density of the battery pack.

[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: A water-cooled plate assembly, the water-cooled plate assembly including a plate body and a first current collector and a second current collector disposed at the end of the plate body; The plate body is provided with at least one cooling channel, and the first collector and the second collector are respectively connected to the cooling channel; The first current collector has a first inlet and a first outlet, and the second current collector has a second inlet and a second outlet. In two adjacent first current collectors, the first first inlet is detachably connected to the second first outlet, and / or, In two adjacent second current collectors, the first second liquid inlet is detachably connected to the second liquid outlet. The battery device further includes a seal, which is disposed between the outer peripheral wall of the first liquid inlet and the inner wall of the first liquid outlet.

2. The battery device according to claim 1, characterized in that, The first current collector includes a shell component and a current collector component, wherein the current collector component is detachably connected to the shell component, and the shell component is disposed at one end of the plate body; The flow collector has a first liquid inlet and a first liquid outlet, and the flow collector is connected to the cooling channel through the housing component.

3. The battery device according to claim 2, characterized in that, The shell component has an opening on one side facing the plate, and a flow collection space is formed inside the shell component. A through hole is formed on the first wall of the flow collection component. The through hole, the flow collection space, and the cooling channel are connected.

4. The battery device according to claim 2, characterized in that, The outer peripheral wall of the first liquid inlet is fitted to the inner wall of the corresponding first liquid outlet.

5. The battery device according to claim 4, characterized in that, The insertion end of the first liquid inlet is provided with a guide chamfer, and the end of the first liquid outlet is provided with a flared structure, wherein the guide chamfer is adapted to the flared structure.

6. The battery device according to claim 3, characterized in that, The flow collecting component has a first channel and a second channel along the fluid flow direction; The first channel is connected to the flow collection space through the through hole.

7. The battery device according to claim 6, characterized in that, The flow collector is provided with a support rib, which is configured to divide the interior of the flow collector into a first channel and a second channel.

8. The battery device according to any one of claims 2 to 6, characterized in that, The cross-sectional profile of the current collection component is flat or circular.

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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