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 an integrated busbar, the at least two battery monomers are arranged along a first direction to form a battery monomer assembly, and each battery monomer comprises an end cover and two electrode terminals arranged on the end cover in a protruding manner; the integrated busbar comprises a connecting assembly and a heat exchange cover plate, the connecting assembly comprises a circuit board and a confluence component, the confluence component is connected with the circuit board, and the confluence component is electrically connected with the electrode terminals of the at least two battery monomers, so that the at least two battery monomers are connected in series or in parallel. The heat exchange cover plate is arranged on one side of the end cover, and the connecting assembly is positioned between the heat exchange cover plate and the battery monomers, so that heat exchange with the battery monomers and the connecting assembly can be realized through the heat exchange cover plate, meanwhile, the heat exchange cover plate can also play a role in protecting the connecting assembly, and an additional protective cover plate is not needed, so that the space utilization rate of the battery device is increased; and meanwhile, the compatibility of the battery device is improved.

Description

Technical Field

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

[0002] In recent years, power batteries have made great strides and can be widely used in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, as well as in electric vehicles, power tools, military equipment and aerospace.

[0003] However, the integrated busbar and heat exchange plate in current power batteries occupy a large amount of space, which affects the space utilization rate of power batteries. Utility Model Content

[0004] This application provides a battery device and an electrical device that can improve the space utilization of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, including at least two battery cells and an integrated busbar. The at least two battery cells are arranged along a first direction to form a battery cell assembly. Each battery cell includes an end cap and two electrode terminals protruding from the end cap. The integrated busbar includes a connecting assembly and a heat exchange cover plate. The heat exchange cover plate is disposed on one side of the end cap. The connecting assembly is located between the heat exchange cover plate and the battery cells. The connecting assembly includes a circuit board and a busbar component. The circuit board is connected to the side of the heat exchange cover plate facing the end cap. The busbar component is connected to the circuit board and electrically connected to the electrode terminals of the at least two battery cells.

[0006] In the above solution, the integrated busbar includes a connecting component and a heat exchange cover. In the connecting component, a current-collecting part is connected to the circuit board and electrically connected to at least two battery cells. Therefore, the at least two battery cells can be connected in series or in parallel through the current-collecting part. The heat exchange cover is located on one side of the end cover, and the connecting component is located between the heat exchange cover and the battery cells. Therefore, the heat exchange cover can exchange heat with the battery cells and the connecting component, regulating the temperature of the battery cells and the connecting component. Simultaneously, the heat exchange cover also protects the connecting component, eliminating the need for an additional protective cover, thus improving the space utilization of the battery device and enhancing its compatibility.

[0007] In some embodiments, at least a portion of the manifold is attached to the heat exchange cover.

[0008] In the above scheme, at least some of the busbar components are in contact with the heat exchange cover plate, which can improve the heat exchange effect between the heat exchange cover plate and the at least some busbar components, and improve the heat dissipation efficiency of the at least some busbar components.

[0009] In some embodiments, the integrated busbar also includes a bracket disposed on an end cap, and the circuit board and busbar components are connected to the bracket.

[0010] In the above solution, the busbar component and circuit board are connected to a bracket, which is then positioned on the end cap. This bracket supports the busbar component and circuit board, improving their stability. Simultaneously, the bracket can also indirectly support the heat exchange cover plate through the busbar component and circuit board, further enhancing the stability of the heat exchange cover plate.

[0011] In some embodiments, the support is located between the two electrode terminals.

[0012] In the above scheme, the bracket is located between the two electrode terminals, which can make reasonable use of the space between the two electrode terminals, making the structure of the battery device more compact and further improving the space utilization rate of the battery device.

[0013] In some embodiments, the bracket is provided with clearance holes for corresponding electrode terminals, and the busbar is electrically connected to the electrode terminals through the clearance holes.

[0014] In the above scheme, the bracket is provided with clearance holes to expose the corresponding electrode terminals, so that the busbar component can be electrically connected to the electrode terminals through the clearance holes. The clearance holes can provide precise positioning for the electrical connection between the busbar component and the electrode terminals, thereby reducing alignment errors during installation and improving alignment accuracy.

[0015] In some embodiments, a plurality of heat exchange channels are formed within the heat exchange cover plate, and the heat exchange channels are spaced apart.

[0016] In the above scheme, multiple heat exchange channels are formed inside the heat exchange cover plate, and the heat exchange channels are distributed at intervals. Each heat exchange channel is used to contain the heat exchange medium, forming a harmonica tube-type heat exchange cover plate. On the one hand, it can provide a larger heat exchange area in a smaller volume to improve heat exchange efficiency. On the other hand, it also helps to flexibly set the shape and structure of the heat exchange cover plate to adapt to the spatial distribution of each battery cell in the battery device. The structure is simple and the cost is low.

[0017] In some embodiments, there are multiple battery cell assemblies, each battery cell assembly is distributed along a second direction, and the first direction and the second direction are intersected; there are multiple heat exchange cover plates, each heat exchange cover plate extends along a first direction, and each heat exchange cover plate is configured one-to-one with each battery cell assembly; and / or, there are multiple connecting components, each connecting component is configured one-to-one with each battery cell assembly.

[0018] In the above scheme, each battery cell assembly is distributed along the second direction, and each assembly includes multiple battery cells distributed along the first direction. Multiple heat exchange covers are used, extending along the first direction. Each heat exchange cover is paired with a battery cell assembly, allowing heat exchange between each cover and the corresponding battery cell assembly and connecting assembly, thus improving heat exchange efficiency. Alternatively, multiple connecting assemblies are used, each paired with a battery cell assembly. The same connecting assembly can be electrically connected to each battery cell in the same battery cell assembly through its busbar, allowing each connecting assembly to independently achieve series or parallel connection of the battery cells in its corresponding battery cell assembly.

[0019] In some embodiments, the battery device further includes two current collectors located on opposite sides of a plurality of heat exchange covers along a first direction, and both current collectors are connected to at least a portion of the plurality of heat exchange covers.

[0020] In the above scheme, by setting up flow collectors on both sides of multiple heat exchange covers along the first direction, so that each flow collector is connected to at least a portion of the multiple heat exchange covers, the heat exchange medium in each heat exchange cover can flow through the flow collectors, thereby forming a heat exchange cycle between the heat exchange covers, which can improve the heat exchange effect between the heat exchange medium and the battery cells and connecting components, and improve the heat dissipation efficiency of the battery cells and connecting components.

[0021] In some embodiments, the connecting component and the heat exchange cover are heat-pressed together to form an integral structure, or the connecting component and the heat exchange cover are bonded together.

[0022] In the above scheme, the connecting component and the heat exchange cover are heat-pressed together to form an integral structure, thereby further improving the structural compactness of both, reducing the space occupied by the integrated busbar, and improving the space utilization rate of the battery device. Alternatively, the connecting component and the heat exchange cover can be bonded together, which can reduce the connection difficulty of the connecting component and the heat exchange cover while ensuring the structural compactness of both, and improving assembly efficiency.

[0023] Secondly, embodiments of this application also provide an electrical device, including the aforementioned battery device.

[0024] 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

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0027] Figure 2 Exploded views of batteries from some embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the structure of a battery cell assembly according to some embodiments of this application;

[0029] Figure 4 This is a schematic diagram of the structure of a battery cell and an integrated busbar provided in some embodiments of this application;

[0030] Figure 5 This is a top view of a battery cell and an integrated busbar provided in some embodiments of this application;

[0031] Figure 6 for Figure 4 Schematic diagram of the cross section at point AA;

[0032] Figure 7 This is another top view of the battery cell and integrated busbar provided in some embodiments of this application;

[0033] Figure 8 This is a bottom view of a battery cell and an integrated busbar provided in some embodiments of this application;

[0034] Figure 9 These are isometric views of battery cells and integrated busbars provided in some embodiments of this application.

[0035] The attached icons are numbered as follows:

[0036] Vehicle 1000; Battery unit 100; Controller 200; Motor 300; First part 10; Battery cell 20; Battery cell assembly 21; End cap 22; Electrode terminal 23; Housing 24; Second part 30; Integrated busbar 40; Connecting assembly 41; Circuit board 411; Busbar component 412; Heat exchange cover 42; Heat exchange channel 421; Bracket 43; Current collector 50; First direction X; Second direction Y. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application 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 drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0039] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0041] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0042] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0043] In this application, "multiple" means two or more (including two).

[0044] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0045] In this embodiment of the application, the battery cell can be a secondary battery cell, which refers to a battery cell that can be used again after being discharged by recharging to activate the active materials.

[0046] The battery cell can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but the embodiments of this application are not limited to this.

[0047] A single battery cell typically includes an electrode assembly. The electrode assembly consists of a positive electrode and a negative electrode. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes.

[0048] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0049] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0050] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0051] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0052] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0053] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0054] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0055] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0056] In some implementations, the electrode assembly is a stacked structure.

[0057] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0058] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0059] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0060] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0061] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0062] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0063] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0064] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0065] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0066] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0067] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0068] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0069] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0070] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0071] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0072] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0073] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0074] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0075] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0076] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0077] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0078] A battery cell typically consists of a casing and an electrode assembly disposed within the casing. The battery cell also includes an electrolyte filled within the casing. The electrolyte wets the electrode assembly, and during the charging and discharging process of the battery device, the electrolyte can conduct ions between the positive and negative electrodes of the electrode assembly.

[0079] Battery devices may include integrated busbars, which are typically electrically connected to the individual battery cells within the device. These busbars provide crucial functions such as electrical connection, temperature and voltage sampling of the individual cells. During operation, both the battery cells and the integrated busbar continuously generate heat. Therefore, to improve operational safety, heat exchange plates can be incorporated into the battery device to exchange heat with the battery cells and regulate their temperature. Currently, integrated busbars can consist of a support frame, busbars, data acquisition components, and protective covers, resulting in a relatively complex structure. This structure occupies a significant amount of space within the battery device, leaving little or no space for the heat exchange plates, thus impacting the space utilization of the battery device.

[0080] Based on the above considerations, this application provides a battery device including at least two battery cells and an integrated busbar. The at least two battery cells are arranged along a first direction to form a battery cell assembly. Each battery cell includes an end cap and two electrode terminals protruding from the end cap. The integrated busbar includes a connecting assembly and a heat exchange cover plate. The heat exchange cover plate is disposed on one side of the end cap. The connecting assembly is located between the heat exchange cover plate and the battery cells. The connecting assembly includes a circuit board and a busbar component. The circuit board is connected to the side of the heat exchange cover plate facing the end cap. The busbar component is connected to the circuit board and electrically connected to the electrode terminals of the at least two battery cells.

[0081] In the above solution, the integrated busbar includes a connecting component and a heat exchange cover. In the connecting component, a current-collecting part is connected to the circuit board and electrically connected to at least two battery cells. Therefore, the at least two battery cells can be connected in series or in parallel through the current-collecting part. The heat exchange cover is located on one side of the end cover, and the connecting component is located between the heat exchange cover and the battery cells. Therefore, the heat exchange cover can exchange heat with the battery cells and the connecting component, regulating the temperature of the battery cells and the connecting component. Simultaneously, the heat exchange cover also protects the connecting component, eliminating the need for an additional protective cover, thus improving the space utilization of the battery device and enhancing its compatibility.

[0082] 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.

[0083] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 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 device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 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 device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0084] In some embodiments of this application, the battery device 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.

[0085] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device provided in some embodiments of this application. The battery device 100 includes a housing and a battery cell 20. In some embodiments, the housing may include a first portion 10 and a second portion 30, which overlap each other, and together define a receiving cavity for accommodating the battery cell 20. The second portion 30 may be a hollow structure with one open end, and the first portion 10 may be a plate-like structure, covering the open side of the second portion 30 so that the first portion 10 and the second portion 30 together define the receiving cavity; alternatively, the first portion 10 and the second portion 30 may both be hollow structures with one open side, with the open side of the first portion 10 covering the open side of the second portion 30. Of course, the battery housing formed by the first portion 10 and the second portion 30 can be of various shapes, such as a cylinder, a cuboid, etc.

[0086] Figure 3 for Figure 2 The diagram shows the structure of a single battery cell assembly. In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or a combination thereof, and then the assembly of these multiple battery cells 20 can be housed within a casing. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or a combination thereof to form battery modules, and then these battery modules can be connected in series, parallel, or a combination thereof to form a whole, which is then housed within a casing.

[0087] Each battery cell 20 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0088] Figure 4 This is a schematic diagram of the structure of a battery cell and an integrated busbar provided in some embodiments of this application. Figure 5 This is a top view of a battery cell and an integrated busbar provided in some embodiments of this application. Figure 6 for Figure 4 A cross-sectional view at point AA.

[0089] Please see Figures 4-6 In a first aspect, embodiments of this application provide a battery device including at least two battery cells 20 and an integrated busbar 40. The at least two battery cells 20 are arranged along a first direction X to form a battery cell assembly 21. Each battery cell 20 includes an end cap 22 and two electrode terminals 23 protruding from the end cap 22. The integrated busbar 40 includes a connecting assembly 41 and a heat exchange cover plate 42. The heat exchange cover plate 42 is disposed on one side of the end cap 22. The connecting assembly 41 is located between the heat exchange cover plate 42 and the battery cell 20. The connecting assembly 41 includes a circuit board 411 and a busbar component 412. The circuit board 411 is connected to the side of the heat exchange cover plate 42 facing the end cap 22. The busbar component 412 is connected to the circuit board 411 and is electrically connected to the electrode terminals 23 of the at least two battery cells 20.

[0090] The first direction X can be the length or width direction of the battery device. In the battery device, the number of battery cells 20 can be two or more, and the two or more battery cells 20 can be arranged along the first direction to form a battery cell assembly 21.

[0091] The busbar component 412 is used to connect the at least two battery cells 20 in series or in parallel. The circuit board 411 is electrically connected to the busbar component 412 and is used to collect and receive one or more parameter information such as voltage and current of each battery cell 20.

[0092] In addition, the integrated busbar 40 may also include a temperature sampling element, which is electrically connected to the circuit board 411 and to the battery cell 20 or the busbar component 412, for collecting and receiving temperature information from each battery cell 20. There can be multiple busbar components 412, and one busbar component 412 can simultaneously connect to the electrode terminals 23 of two battery cells 20. It is understood that the heat exchange cover 42 is located on the side of the connecting assembly 41 away from the battery cell 20, serving as a protective cover to protect the busbar component 412 and the circuit board 411, thereby improving their service life. Furthermore, the heat exchange cover 42 may contain a heat exchange channel 421, which accommodates a heat exchange medium, allowing heat exchange between the heat exchange medium and the connecting assembly 41 and the battery cell 20, thereby regulating the temperature of the connecting assembly 41 and the battery cell 20.

[0093] In the above scheme, the integrated busbar 40 includes a connecting component 41 and a heat exchange cover plate 42. In the connecting component 41, the busbar component 412 is connected to the circuit board 411, and the busbar component 412 is electrically connected to at least two battery cells 20. Therefore, the at least two battery cells 20 can be connected in series or in parallel through the busbar component 412. The heat exchange cover plate 42 is disposed on one side of the end cover 22, and the connecting component 41 is located between the heat exchange cover plate 42 and the battery cells 20. Therefore, the heat exchange cover plate 42 can exchange heat with the battery cells 20 and the connecting component 41, thereby regulating the temperature of the battery cells 20 and the connecting component 41. At the same time, the heat exchange cover plate 42 can also protect the connecting component 41, eliminating the need for an additional protective cover plate, which can improve the space utilization of the battery device and enhance the compatibility of the battery device.

[0094] In some embodiments, at least a portion of the manifold 412 is attached to the heat exchange cover 42.

[0095] In the above scheme, at least a portion of the busbar component 412 is in contact with the heat exchange cover plate 42, which can improve the heat exchange effect between the heat exchange cover plate 42 and the at least a portion of the busbar component 412, and improve the heat dissipation efficiency of the at least a portion of the busbar component 412.

[0096] In some embodiments, the integrated busbar 40 further includes a bracket 43, which is disposed on the end cap 22, and the circuit board 411 and the busbar component 412 are connected to the bracket 43.

[0097] The bracket 43 is located between the end cap 22 and the connecting assembly 41, supporting the circuit board 411 and the busbar component 412, and indirectly supporting the heat exchange cover plate 42. Specifically, the circuit board 411 and the busbar component 412 can both be located on the side of the bracket 43 opposite to the end cap 22, so that they are supported by the bracket 43, and the busbar component 412 can protrude relative to the side of the bracket 43 for electrical connection with the electrode terminal 23. The heat exchange cover plate 42 can be located on the side of the connecting assembly 41 opposite to the bracket 43, and the bracket 43 can indirectly support the heat exchange cover plate 42 through the connecting assembly 41. Optionally, the bracket 43 can be an insulating bracket to reduce the risk of short circuits within the battery device.

[0098] In the above solution, the busbar component 412 and the circuit board 411 are connected to the bracket 43, and the bracket 43 is positioned on the end cover 22. The bracket 43 supports the busbar component 412 and the circuit board 411, improving their stability. Simultaneously, the bracket 43 can also indirectly support the heat exchange cover plate 42 through the busbar component 412 and the circuit board 411, further improving the stability of the heat exchange cover plate 42.

[0099] In some embodiments, the bracket 43 is located between the two electrode terminals 23.

[0100] The battery cell 20 includes a housing and an electrode assembly. The housing may include a housing 24, an end cap 22, and two electrode terminals 23 protruding from the end cap 22. The housing 24 and the end cap 22 cover each other to form a receiving cavity for accommodating the electrode assembly. The two electrode terminals 23 are spaced apart on the end cap 22, and a certain gap area can be formed between them. The bracket 43 is located in this gap area.

[0101] In the above scheme, the bracket 43 is located between the two electrode terminals 23, which can make reasonable use of the space between the two electrode terminals 23, making the structure of the battery device more compact and further improving the space utilization rate of the battery device.

[0102] In some embodiments, the bracket 43 is provided with clearance holes corresponding to the electrode terminals 23, and the busbar component 412 is electrically connected to the electrode terminals 23 through the clearance holes.

[0103] The bracket 43 can have clearance holes along its thickness direction, the number of which is adapted to the number of electrode terminals 23 required for electrical connection of the busbar component 412 of the connecting assembly 41. The bracket 43 is disposed on the end cover 22, and the clearance holes are provided thereon. The clearance holes allow the corresponding electrode terminals 23 to be exposed relative to the bracket 43 for electrical connection with the busbar component 412. Optionally, the electrode terminals 23 can be inserted into the clearance holes of the bracket 43 to reduce the gap between the bracket 43 and the end cover 22, further improving the space utilization of the battery device.

[0104] In the above scheme, the bracket 43 is provided with a clearance hole to expose the corresponding electrode terminal 23, so that the bus component 412 can be electrically connected to the electrode terminal 23 through the clearance hole. The clearance hole can provide accurate positioning for the electrical connection between the bus component 412 and the electrode terminal 23, thereby reducing the alignment error during the installation process and improving the alignment accuracy.

[0105] Please continue reading. Figure 6 In some embodiments, a plurality of heat exchange channels 421 are formed inside the heat exchange cover plate 42, and the heat exchange channels 421 are distributed at intervals.

[0106] It is understandable that multiple heat exchange channels 421 are formed inside the heat exchange cover plate 42, and each heat exchange channel 421 is distributed at intervals, that is, each heat exchange channel 421 is independent of each other and does not communicate with each other, thus forming a harmonica tube type heat exchange cover plate.

[0107] In the above scheme, multiple heat exchange channels 421 are formed inside the heat exchange cover plate 42, and the heat exchange channels 421 are distributed at intervals. Each heat exchange channel 421 is used to accommodate the heat exchange medium, forming a harmonica tube-type heat exchange cover plate. On the one hand, it can provide a larger heat exchange area in a smaller volume to improve heat exchange efficiency. On the other hand, it also helps to flexibly set the shape and structure of the heat exchange cover plate 42 to adapt to the spatial distribution of each battery cell 20 in the battery device. The structure is simple and the cost is low.

[0108] Figure 7 This is another top view of the battery cell and integrated busbar provided in some embodiments of this application. Figure 8 This is a bottom view of a battery cell and an integrated busbar provided in some embodiments of this application. Figure 9 These are isometric views of battery cells and integrated busbars provided in some embodiments of this application.

[0109] Please continue reading. Figures 7-9 In some embodiments, there are multiple battery cell assemblies 21, each battery cell assembly 21 is distributed along the second direction Y, and the first direction X intersects with the second direction Y; please refer to Figures 7 to 9 There are multiple heat exchange cover plates 42, which extend along the first direction X, and each heat exchange cover plate 42 is configured one-to-one with each battery cell assembly 21; and / or, please refer to Figure 8 There are multiple connecting components 41, and each connecting component 41 is set one-to-one with each battery cell component 21.

[0110] Specifically, the first direction X and the second direction Y are intersecting, preferably perpendicular to each other. In this case, the first direction X can be either the length or width direction of the battery device, and the second direction Y can be the other. In the battery device, multiple battery cells 20 are distributed along the first direction X and the second direction Y. At least some of the battery cells 20 can be connected in series; and / or, at least some of the battery cells 20 can also be connected in parallel. This embodiment does not limit this. The actual number of battery cells 20 in the battery device can be reasonably set in practical applications, and this embodiment does not limit this.

[0111] In the battery device, multiple battery cells 20 can form multiple battery cell assemblies 21 distributed along the second direction Y. Each battery cell assembly 21 includes multiple battery cells 20 distributed along the first direction X. The number of battery cells 20 in each battery cell assembly 21 can be the same or different, and this embodiment does not impose any restrictions on this. There can be multiple heat exchange cover plates 42. Each connecting component 41 is set one-to-one with each battery cell assembly 21. Along the height direction of the battery cell 20, the orthographic projection of the battery cell assembly 21 on the battery device casing overlaps with the orthographic projection of the corresponding heat exchange cover plate 42 on the casing, so as to improve the heat exchange effect between the heat exchange cover plate 42 and each battery cell 20 in the corresponding battery cell assembly 21. At the same time, it can improve the protection effect of the heat exchange cover plate 42 on each battery cell 20 in the corresponding battery cell assembly 21 and the corresponding connecting component. There can be multiple connecting components 41, and each connecting component 41 is set one-to-one with each battery cell assembly 21. Each connecting component 41 can include a circuit board 411 and a busbar component 412. The number of circuit boards 411 can correspond one-to-one with the number of battery cell assemblies 21. The busbar component 412 in each connecting component 41 is electrically connected to each battery cell 20 in the corresponding battery cell assembly 21.

[0112] In the above scheme, each battery cell assembly 21 is distributed along the second direction Y, and each includes multiple battery cells 20 distributed along the first direction X. Multiple heat exchange cover plates 42 are used, extending along the first direction X. Each heat exchange cover plate 42 is paired with a battery cell assembly 21, thereby improving the heat exchange effect by exchanging heat between each heat exchange cover plate 42 and the corresponding battery cell assembly 21 and connecting assembly 41. Alternatively, multiple connecting assemblies 41 are used, each paired with a battery cell assembly 21. The same connecting assembly 41 is electrically connected to each battery cell 20 in the same battery cell assembly 21 through its busbar 412. This allows each connecting assembly 41 to independently achieve series or parallel connection of each battery cell 20 in the corresponding battery cell assembly 21, improving the series and parallel connection effect and reducing signal interference between different battery cell assemblies 21.

[0113] In some embodiments, the connection components 41 are electrically connected to each other.

[0114] Optionally, the battery device may also include an adapter structure through which each connecting component 41 is electrically connected.

[0115] In the above scheme, the connecting component 41 is electrically connected to each battery cell 20 in the corresponding battery cell assembly 21, realizing the series or parallel connection of each battery cell 20 in the corresponding battery cell assembly 21. On this basis, each connecting component 41 is electrically connected to each other, realizing the series or parallel connection of each battery cell assembly 21. This can improve the consistency of each battery cell 20 in the battery device in terms of voltage, current, capacity, etc., which helps to reduce energy loss and safety hazards inside the battery device. At the same time, it is conducive to unified control and monitoring of each battery cell 20 in the battery device, ensuring that each battery device can operate safely and efficiently.

[0116] Please continue reading. Figures 7-9 In some embodiments, the battery device further includes two current collectors 50, which are located on both sides of a plurality of heat exchange covers 42 along a first direction X, and both current collectors 50 are connected to at least a portion of the plurality of heat exchange covers 42.

[0117] Specifically, the statement that both manifolds 50 are connected to at least a portion of the plurality of heat exchange cover plates 42 can mean that each manifold 50 is connected to at least a portion of the plurality of heat exchange cover plates 42. In this case, one manifold 50 may be connected to a portion of the plurality of heat exchange cover plates 42 or to all of the heat exchange cover plates 42, and the other manifold 50 may be connected to a portion of the plurality of heat exchange cover plates 42 or to all of the heat exchange cover plates 42.

[0118] Each heat exchange cover plate 42 can form a first channel, and each of the two manifolds 50 can form a second channel. The connection between the manifold 50 and the heat exchange cover plate 42 can include the second channel in the manifold 50 being connected to the first channel in the heat exchange cover plate 42. The first channel serves as a heat exchange channel to contain the heat exchange medium, enabling the heat exchange medium to exchange heat with the battery cell 20 and the connecting assembly 41. The second channel can serve as a connecting channel between the first channels, allowing the heat exchange medium to circulate between the first channels.

[0119] It is understood that the two manifolds 50 are located on both sides of the multiple heat exchange cover plates 42 along the first direction X. The second channel in the two manifolds 50 can supply heat exchange medium to flow on the opposite sides of the heat exchange cover plates 42, so as to accelerate the flow rate of the heat exchange medium and further improve the heat exchange efficiency.

[0120] Optionally, the heat exchange cover plate 42 can form a medium inlet and a medium outlet, which are respectively connected to the first channel. The medium inlet is used for the heat exchange medium to enter the first channel, and the medium outlet is used for the heat exchange medium to flow out of the first channel, so that the heat exchange medium in the first channel can be in a flowing state and continuously exchange heat with the corresponding battery cell 20 and connecting assembly 41 during the flow process, so as to effectively improve the heat exchange effect. Optionally, there can be multiple first channels in the heat exchange cover plate 42. The multiple first channels are spaced apart and not connected to each other. Correspondingly, the heat exchange cover plate 42 can form multiple medium inlets and multiple medium outlets. Each medium inlet is connected to each first channel one-to-one, and each medium outlet is connected to each first channel one-to-one.

[0121] In the above scheme, by setting up flow collectors 50 on both sides of the multiple heat exchange cover plates 42 along the first direction X, so that each flow collector 50 is connected to at least a portion of the multiple heat exchange cover plates 42, the heat exchange medium in each heat exchange cover plate 42 can flow through the flow collectors 50, thereby forming a heat exchange cycle between the heat exchange cover plates 42, which can improve the heat exchange effect between the heat exchange medium and the battery cell 20 and the connecting assembly 41, and improve the heat dissipation efficiency of the battery cell 20 and the connecting assembly 41.

[0122] In some embodiments, the connecting component 41 and the heat exchange cover plate 42 are heat-pressed together to form an integral structure, or the connecting component 41 and the heat exchange cover plate 42 are bonded to each other.

[0123] Specifically, the connecting component 41 and the heat exchange cover plate 42 can be prepared separately and then hot-pressed into a single structure. Alternatively, the connecting component 41 and the heat exchange cover plate 42 can be prepared into a single structure during the manufacturing process. This embodiment does not impose any limitations on this. The connecting component 41 and the heat exchange cover plate 42 are bonded together, meaning that the connecting component 41 and the heat exchange cover plate 42 are prepared separately to improve production efficiency. After preparation, the connecting component 41 and the heat exchange cover plate 42 are bonded and fixed together using adhesive.

[0124] In the above scheme, the connecting component 41 and the heat exchange cover plate 42 are thermally pressed together to form an integral structure, thereby further improving the structural compactness of the two, reducing the space occupied by the integrated busbar 40, and improving the space utilization of the battery device 100. Alternatively, the connecting component 41 and the heat exchange cover plate 42 can be bonded together, which can reduce the connection difficulty of the connecting component 41 and the heat exchange cover plate 42 and improve assembly efficiency while ensuring the structural compactness of the two.

[0125] Secondly, embodiments of this application also provide an electrical device, including the battery device 100 described above. The electrical device provided in this application has the technical effects of the battery device 100 in any of the above embodiments, and the explanations of structures and terms that are the same as or corresponding to those in the above embodiments will not be repeated here.

[0126] This application provides a battery device including at least two battery cells 20 and an integrated busbar 40. The at least two battery cells 20 are arranged along a first direction X to form a battery cell assembly 21. Each battery cell 20 includes an end cap 22 and two electrode terminals 23 protruding from the end cap 22. The integrated busbar 40 includes a connecting assembly 41 and a heat exchange cover plate 42. The heat exchange cover plate 42 is disposed on one side of the end cap 22. The connecting assembly 41 is located between the heat exchange cover plate 42 and the battery cells 20. The connecting assembly 41 includes a circuit board 411 and a busbar component 412. The circuit board 411 is connected to the side of the heat exchange cover plate 42 facing the end cap 22. The busbar component 412 is connected to the circuit board 411 and electrically connected to the electrode terminals 23 of the at least two battery cells 20. At least a portion of the busbar component 412 is in contact with the heat exchange cover plate 42. The integrated busbar 40 also includes a bracket 43, which is disposed on the end cap 22. The circuit board 411 and the busbar component 412 are connected to the bracket 43. The bracket 43 is located between the two electrode terminals 23; or, the bracket 43 is provided with a clearance hole for the corresponding electrode terminal 23, and the busbar component 412 is electrically connected to the electrode terminal 23 through the clearance hole.

[0127] 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 are arranged along a first direction to form a battery cell assembly, and each battery cell includes an end cap and two electrode terminals protruding from the end cap. An integrated busbar includes a connecting assembly and a heat exchange cover plate. The heat exchange cover plate is disposed on one side of the end cover. The connecting assembly is located between the heat exchange cover plate and the battery cell. The connecting assembly includes a circuit board and a busbar component. The circuit board is connected to the side of the heat exchange cover plate facing the end cover. The busbar component is connected to the circuit board and is electrically connected to the electrode terminals of at least two of the battery cells.

2. The battery device according to claim 1, characterized in that, At least a portion of the manifold is in contact with the heat exchange cover plate.

3. The battery device according to claim 1, characterized in that, The integrated busbar also includes a bracket, which is disposed on the end cover, and the circuit board and the busbar component are connected to the bracket.

4. The battery device according to claim 3, characterized in that, The bracket is located between the two electrode terminals.

5. The battery device according to claim 3, characterized in that, The bracket is provided with clearance holes corresponding to the electrode terminals, and the busbar is electrically connected to the electrode terminals through the clearance holes.

6. The battery device according to claim 1, characterized in that, Multiple heat exchange channels are formed inside the heat exchange cover plate, and the heat exchange channels are distributed at intervals.

7. The battery device according to claim 1, characterized in that, The number of battery cell assemblies is multiple, and each battery cell assembly is distributed along the second direction, wherein the first direction and the second direction intersect. The number of heat exchange cover plates is multiple, the heat exchange cover plates extend along the first direction, and each heat exchange cover plate is set one-to-one with each battery cell assembly; And / or, the number of the connecting components is multiple, and each connecting component is configured one-to-one with each battery cell component.

8. The battery device according to claim 7, characterized in that, The battery device further includes two current collectors, which are located on both sides of the plurality of heat exchange covers along the first direction, and both current collectors are connected to at least a portion of the plurality of heat exchange covers.

9. The battery device according to any one of claims 1-8, characterized in that, The connecting component and the heat exchange cover are heat-pressed together to form an integral structure, or the connecting component and the heat exchange cover are bonded to each other.

10. An electrical device, characterized in that, Includes the battery device according to any one of claims 1-9.

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