Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a box body, a plurality of battery monomers and an integrated board; the battery monomer comprises a shell, the shell is provided with a first surface, and an electrode terminal is convexly arranged on the first surface; the integrated board comprises a confluence piece and a pressing plate for supporting the confluence piece, the pressing plate abuts against the first face, first openings are formed in the positions, corresponding to the electrode terminals, of the pressing plate, and the confluence piece extends into the first openings to be connected with the corresponding electrode terminals. The pressing plate is arranged to support the confluence piece, the first opening is formed in the pressing plate, and the power supply terminal extends into the first opening to be connected with the confluence piece, so that the integration level is improved, the number of components is reduced, and assembling is convenient; and the pressing plate is propped against the first surface of the battery monomer, so that the space of the height range of the electrode terminal extending out of the first surface on the first surface of the battery monomer can be fully utilized, and the space energy density of the battery device is improved.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and more particularly, relates to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their energy-saving and environmental protection advantages. For electric vehicles, battery technology is an important factor related to their development.

[0003] After the battery cells are assembled in the box body of the battery device, currently, an integrated busbar is generally used to connect the battery cells for realizing electrical connection, signal acquisition, and safety management between the battery cells. And a pressure plate is provided between the integrated busbar and the box cover to separate the integrated busbar from the box cover. However, this structure occupies a large space, resulting in a low space energy density of the battery device. Summary of the Utility Model

[0004] The purpose of the embodiments of this application is to provide a battery device and an electrical device to improve the problem in the related art that the integrated busbar and the pressure plate occupy a large space, resulting in a low space energy density of the battery device.

[0005] In a first aspect, the embodiments of this application provide a battery device, including:

[0006] A box body with a receiving space inside;

[0007] A plurality of battery cells disposed in the receiving space. The battery cells include a housing having a first surface, and electrode terminals protruding from the first surface;

[0008] An integrated board disposed on the side where the first surface is located;

[0009] The integrated board includes a busbar for connecting the electrode terminals and a pressure plate for supporting the busbar. The pressure plate abuts against the first surface, and first openings are provided at positions corresponding to the respective electrode terminals on the pressure plate. The busbar extends into the first openings to be connected to the corresponding electrode terminals.

[0010] In the technical solution of the embodiments of this application, the pressure plate is provided to support the busbar, and the first openings are provided on the pressure plate for the electrode terminals to extend into and be connected to the busbar, so as to improve the integration degree, reduce the number of components, and facilitate assembly; and by abutting the pressure plate against the first surface of the battery cell, the space within the height range where the electrode terminals protrude from the first surface of the battery cell can be fully utilized to improve the structural strength of the pressure plate, so as to reduce the overall height of the pressure plate, the battery cell, and the busbar, and improve the space energy density of the battery device.

[0011] In some embodiments, the first surface is adhesively connected to the pressure plate.

[0012] Through the above technical solution, the first side of the battery cell is adhesively connected to the pressing plate, and multiple battery cells can be connected into an integral body through the pressing plate to improve the overall structural strength of the battery device.

[0013] In some embodiments, a sampling line for conducting electrical signals is provided on the pressing plate.

[0014] Through the above technical solution, by providing a sampling line on the pressing plate, the integration degree of the integrated board can be further improved, which is convenient for assembly.

[0015] In some embodiments, a flexible printed circuit board is provided on the pressing plate, and a sampling line is provided in the flexible printed circuit board.

[0016] Through the above technical solution, by providing a flexible printed circuit board on the pressing plate, the sampling line can be conveniently arranged on the pressing plate, which is convenient for processing and manufacturing.

[0017] In some embodiments, the flexible printed circuit board is adhesively bonded to the pressing plate.

[0018] Through the above technical solution, the flexible printed circuit board can be conveniently arranged on the pressing plate, which is convenient for the installation and fixation of the flexible printed circuit board.

[0019] In some embodiments, a sensor for collecting the state parameters of the battery cell is further provided on the pressing plate, and the sensor is electrically connected to the sampling line.

[0020] Through the above technical solution, by providing a sensor on the pressing plate, the integration degree of the integrated board can be improved, and the state parameters of the battery cell can be conveniently detected through the sensor so as to control the safe charging and discharging of the battery cell.

[0021] In some embodiments, the busbar and the pressing plate form an integral structure, or the busbar is adhesively connected to the pressing plate, or the busbar is fixed to the pressing plate through a fastener.

[0022] Through the above technical solution, forming the busbar and the pressing plate into an integral body can facilitate processing and manufacturing, and is also convenient for the pressing plate to fixedly support the busbar.

[0023] Adhesively connecting the busbar and the pressing plate is convenient for connection and assembly.

[0024] Fixing the busbar to the pressing plate through a fastener is convenient for connection and is also convenient for the pressing plate to fixedly support the busbar.

[0025] In some embodiments, the integrated board includes a connecting plate, the busbar is connected to the connecting plate, and a pressing plate is connected to one side of the connecting plate close to the first side.

[0026] Through the above technical solution, by connecting the busbar through the connecting plate and then connecting the connecting plate and the pressing plate, the assembly and manufacturing of the integrated board can be facilitated.

[0027] In some embodiments, a pressing plate is connected to the side of the connecting plate facing away from the first surface.

[0028] Through the above technical solution, pressing plates are respectively arranged on both sides of the connecting plate, which can improve the structural strength of the integrated plate and can also well protect the connecting plate and the bus bar.

[0029] In some embodiments, the connecting plate and the pressing plate form an integral structure.

[0030] Through the above technical solution, integrating the connecting plate and the pressing plate into one body facilitates connection and can also improve the connection strength between the connecting plate and the pressing plate.

[0031] In some embodiments, a pressure relief mechanism is provided on the outer shell. The pressure relief mechanism is located on the first surface, and a second opening is provided on the pressing plate at a position corresponding to the pressure relief mechanism.

[0032] Through the above technical solution, the second opening is provided to expose the pressure relief mechanism on the battery cell so that the pressure relief mechanism can relieve pressure, improving the safety of the battery cell.

[0033] In some embodiments, the bus bar includes a support portion and a connection portion. The connection portion is connected to the support portion, the support portion is fixedly connected to the pressing plate, at least a part of the connection portion extends into the first opening, and the connection portion is connected to the electrode terminal.

[0034] Through the above technical solution, the support portion is provided to facilitate the connection and fixation of the bus bar to the pressing plate; the connection portion is provided to facilitate the connection of the bus bar to the electrode terminal of the battery cell for the production and assembly use of the integrated plate.

[0035] In some embodiments, the distance from the connection portion to the first surface is less than or equal to the distance from the support portion to the first surface.

[0036] Through the above technical solution, by setting the connection portion to be relatively closer to the first surface than the support portion, the thickness of the pressing plate on the side of the support portion close to the battery cell can be set larger to increase the structural strength of the connection with the first surface of the battery cell.

[0037] In some embodiments, the distance from the connection portion to the first surface is greater than the distance from the support portion to the first surface.

[0038] Through the above technical solution, by setting the support portion to be relatively closer to the first surface than the connection portion, the thickness of the pressing plate on the side of the support portion away from the battery cell can be set larger to better isolate the support portion from the corresponding side wall of the box body.

[0039] In some embodiments, there is one integrated plate, and the first surfaces of all battery cells are connected to the pressing plate of the integrated plate.

[0040] Through the above technical solution, the integrated board is set to one, which can reduce the number of components, reduce the assembly process, and improve the assembly efficiency.

[0041] In some embodiments, there are multiple integrated boards, and the multiple integrated boards cooperate to cover all the battery cells in the box.

[0042] Through the above technical solution, setting multiple integrated boards can facilitate the processing and manufacturing of the integrated boards.

[0043] In a second aspect, an embodiment of the present application provides an electrical device, including the battery device as described in the above embodiment, and the battery device is used to provide electrical energy.

[0044] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 Structural schematic diagram of a vehicle in some embodiments of the present application;

[0047] Figure 2 Exploded structural schematic diagram of a battery device in some embodiments of the present application;

[0048] Figure 3 Exploded structural schematic diagram of a battery cell in some embodiments of the present application;

[0049] Figure 4 Exploded schematic diagram of a partial structure of a battery device in some embodiments of the present application;

[0050] Figure 5 Cross-sectional structural schematic diagram of the connection between a battery cell and an integrated board in some embodiments of the present application;

[0051] Figure 6 Structural schematic diagram of an integrated board in some embodiments of the present application;

[0052] Figure 7 Exploded structural schematic diagram of an integrated board in some embodiments of the present application;

[0053] Figure 8 ForFigure 7 Enlarged view of part A;

[0054] Figure 9 Exploded structural schematic diagram of an integrated board according to other embodiments of the present application;

[0055] Figure 10 Cross-sectional structural schematic diagram of the connection between a battery cell and an integrated board according to other embodiments of the present application.

[0056] Among them, the main reference signs in each drawing are as follows:

[0057] 11, vehicle; 111, controller; 112, motor;

[0058] 200, battery device; 20, box body; 201, accommodation space; 21, box cover; 22, bottom plate; 23, frame; 24, reinforcing beam; 241, mounting beam;

[0059] 300, battery cell; 31, electrode assembly; 311, main body part; 312, tab; 3121, positive tab; 3122, negative tab; 32, outer shell; 320, first surface; 321, housing; 322, end cover; 3221, separator; 3201, liquid injection hole; 3202, pressure relief mechanism; 33, electrode terminal; 331, positive terminal; 332, negative terminal; 34, adapter plate; 341, positive adapter plate; 342, negative adapter plate; 35, insulating film; 36, support plate;

[0060] 40, integrated board; 41, bus bar; 411, support part; 412, connection part; 42, pressing plate; 420, first opening; 44, connecting plate;

[0061] X, length direction; Y, width direction; Z, height direction. Detailed implementation manners

[0062] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0064] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0065] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments in any suitable manner.

[0066] If there is no special indication, all implementation manners and optional implementation manners of the present application can be combined with each other to form a new technical solution.

[0067] If there is no special indication, all technical features and optional technical features of the present application can be combined with each other to form a new technical solution.

[0068] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0069] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces). The meaning of "several" is one or more, unless otherwise specifically defined.

[0070] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the embodiments of the present application.

[0071] In the description of the embodiments of the present application, unless otherwise clearly specified or limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0072] In the description of the embodiments of the present application, unless otherwise clearly specified or limited, when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0073] In the description of the embodiments of the present application, unless otherwise clearly specified or limited, the technical term "proximity" means close in position. For example, for three components A1, A2, and B, if the distance between A1 and B is greater than the distance between A2 and B, then compared with A1, A2 is closer to B, that is, A2 is proximate to B, and it can also be said that B is proximate to A2. Again, when there are multiple C components, the multiple C components are C1, C2... C N , when one of the C components, such as C2, is closer to the B component than other C components, then B is proximate to C2, and it can also be said that C2 is proximate to B.

[0074] With the development of battery technology, the application of battery devices is becoming more and more extensive. Correspondingly, the requirements for the volume energy density of battery devices are also getting higher and higher.

[0075] After a battery cell is assembled in the box body of a battery device, an integrated busbar is generally provided to connect the battery cells for realizing electrical connection, signal acquisition, and safety management between the battery cells. The integrated busbar includes a support plate, a busbar component, and a signal acquisition component. The support plate is usually made of materials such as plastic and ceramic. The busbar component is installed on the support plate, and the signal acquisition component is installed on the support plate. The battery cells are connected through the busbar component of the integrated busbar to realize conductive connection between the battery cells, and the signal acquisition component is used to collect information such as the voltage, current, and temperature of the battery cells for managing the charging and discharging of the battery cells. In addition, a pressing plate is provided between the integrated busbar and the box cover of the box body to separate the integrated busbar from the box cover. Moreover, after the assembly is completed, the pressing plate will also press against the integrated busbar to reduce the occupied space. However, since the busbar component on the integrated busbar is connected to the electrode terminal of the battery cell, the integrated busbar is arranged above the electrode terminal, which will result in a free space with a height approximately equal to that of the electrode terminal between the end face of the battery cell and the integrated busbar, which will not only affect the structural strength of the battery device but also reduce the space energy density of the battery device.

[0076] Based on the above considerations, in order to improve the problem that the integrated busbar and the pressing plate in the related art occupy a large amount of space, resulting in a low space energy density of the battery device, the embodiment of the present application provides a battery device. By providing an integrated plate, the integrated plate includes a busbar component and a pressing plate. The busbar component is supported by the pressing plate, and a first opening is provided on the pressing plate for the electrode terminal to extend into and connect with the busbar component to improve the integration degree, reduce the number of components, and facilitate assembly. And by pressing the pressing plate against the first surface of the battery cell, the space within the height range where the electrode terminal extends out of the first surface on the first surface of the battery cell can be fully utilized to improve the structural strength of the pressing plate, reduce the overall height of the pressing plate, the battery cell, and the busbar component, and improve the space energy density of the battery device.

[0077] In the embodiment of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to be used.

[0078] The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiment of the present application is not limited thereto.

[0079] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0080] For ease of explanation, an electrical device provided in an embodiment of the present application will be taken as an example, and the electrical device will be described by taking a vehicle as an example.

[0081] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle 11 provided in some embodiments of the present application. The vehicle 11 may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 200 is disposed inside the vehicle 11, and the battery device 200 may be disposed at the bottom, the head, or the tail of the vehicle 11. The battery device 200 may be used for power supply of the vehicle 11. For example, the battery device 200 may serve as an operating power source of the vehicle 11. The vehicle 11 may further include a controller 111 and a motor 112, and the controller 111 is used to control the battery device 200 to supply power to the motor 112, for example, for power requirements during starting, navigation, and driving of the vehicle 11.

[0082] In some embodiments, the battery device 200 may not only serve as an operating power source of the vehicle 11, but also serve as a driving power source of the vehicle 11, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 11.

[0083] Please refer to Figure 2 , an embodiment of the present application provides a battery device 200. The battery device 200 may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells 300, and the plurality of battery cells 300 are connected in series, parallel, or in a hybrid connection through a busbar 41.

[0084] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 300.

[0085] As an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells 300 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 300 with cable ties.

[0086] In some embodiments, the battery device 200 may be a battery pack, and the battery pack includes a box body 20 and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body 20.

[0087] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body 20 by fixing the battery module in the box body 20.

[0088] As an example, the battery cell assembly may also be accommodated in the box body 20 by directly fixing a plurality of battery cells 300 to the box body 20.

[0089] In some embodiments, the box body 20 may include a box cover 21, a frame 23, and a bottom plate 22. The box cover 21 and the bottom plate 22 are respectively connected to opposite sides of the frame 23, such that a closed space is formed inside the box body 20, and this closed space is a receiving space 201 for receiving battery cells 300. The frame 23 refers to a partial structure forming the peripheral side walls of the box body 20, the box cover 21 refers to a plate-like structure forming the top of the box body 20, and the bottom plate 22 refers to a plate-like structure forming the bottom of the box body 20.

[0090] In some embodiments, the box body 20 may include a first box body and a second box body. The first box body and the second box body are snapped together, such that a closed space is formed inside the box body 20 to receive battery cells 300. Here, "closed" means covered or closed, which can be sealed or non-sealed. The first box body can be the box cover or the bottom plate of the box body 20. The first box body and the second box body can also both be hollow structures with an opening on one side, and the opening side of the first box body is covered with the opening side of the second box body.

[0091] In some embodiments, the box body 20 includes a reinforcing beam 24, and the reinforcing beam 24 is connected to the frame 23. The reinforcing beam 24 refers to a structural member provided on the box body 20 for increasing the structural strength of the box body 20. The reinforcing beam 24 is provided and connected to the frame 23 to enhance the structural strength of the box body 20.

[0092] In some embodiments, the reinforcing beam 24 includes a mounting beam 241. The mounting beam 241 is fixedly connected to the frame 23 and is used to connect an external device using the battery device 200, so as to support the battery device 200 on this device.

[0093] In some embodiments, the reinforcing beam 24 includes an expansion beam. The expansion beam is installed inside the box body 20 to increase the structural strength of the box body 20, and can also be used to resist the battery cell 300 to limit the expansion deformation of the battery cell 300.

[0094] In some embodiments, the expansion beam can also be connected to the bottom plate 22 of the box body 20 to better fix the expansion beam in the box body 20.

[0095] In some embodiments, the box body 20 can be part of the chassis structure of a vehicle. For example, a part of the box body 20 can become at least a part of the floor of the vehicle, or a part of the box body 20 can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0096] Please refer to Figure 3 , the battery cell 300 includes one or more electrode assemblies 31. The electrode assembly 31 is also called a bare battery cell and is a component for storing and releasing electrical energy. When there are multiple electrode assemblies 31, the multiple electrode assemblies 31 are connected in parallel.

[0097] In some embodiments, the electrode assembly 31 includes a main body portion 311, and tab ears 312 are provided on the main body portion 311. The main body portion 311 is the main part of the electrode assembly 31. The tab ears 312 are used in the electrode assembly 31 to connect to an external circuit, enabling the current for charging and discharging of the main body portion 311 to flow. The tab ears 312 include a positive tab ear 3121 and a negative tab ear 3122, and the positive tab ear 3121 and the negative tab ear 3122 are respectively used to connect to the positive and negative terminals of the external circuit. The positive tab ear 3121 and the negative tab ear 3122 may be located on the same side of the main body portion 311, or may be provided on different sides of the main body portion 311, such as on opposite sides of the main body portion 311.

[0098] In some embodiments, the battery cell 300 includes a housing 32, and the housing 32 refers to a structure that provides a receiving space to receive the electrode assembly 31 and plays a role in supporting and protecting the electrode assembly 31.

[0099] In some embodiments, the housing 32 includes a housing body 321 and an end cap 322. The electrode assembly 31 is installed in the housing body 321, and the end cap 322 covers the housing body 321.

[0100] The end cap 322 refers to a component that covers the opening of the housing body 321 to isolate the internal environment of the battery cell 300 from the external environment. The shape of the end cap 322 may be adapted to the shape of the housing body 321 to cooperate with covering the housing body 321. Optionally, the end cap 322 may be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 322 is not easily deformed when being squeezed or collided, enabling the battery cell 300 to have a higher structural strength and the reliability performance can also be improved. The material of the end cap 322 may also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special restrictions on this.

[0101] The housing body 321 is a component used to cooperate with the end cap 322 to form the internal environment of the battery cell 300. Among them, the formed internal environment can be used to accommodate the electrode assembly 31, the electrolyte, and other components. The housing body 321 may be of various shapes and various sizes, such as a cuboid shape, a cylindrical shape, a hexagonal prism shape, etc. Specifically, the shape of the housing body 321 may be determined according to the specific shape and size of the battery cell 300. The material of the housing body 321 may be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special restrictions on this.

[0102] In some embodiments, an isolation member 3221 is installed on the end cap 322, and the isolation member 3221 can be used to isolate the electrical connection components in the housing body 321 from the end cap 322 to reduce the risk of short circuit. Exemplarily, the isolation member 3221 may be plastic, rubber, etc.

[0103] In some embodiments, a liquid injection hole 3201 is provided on the outer casing 32. The liquid injection hole 3201 refers to a hole structure for injecting electrolyte into the outer casing 32. After the electrode assembly 31 is manufactured, the electrode assembly 31 needs to be installed in the housing 321, and the electrolyte is injected so that the electrode assembly 31 is immersed in the electrolyte, enabling the electrode assembly 31 to fully absorb the electrolyte. The electrolyte can provide some active ions for use as conductive ions during the charge and discharge process; in addition, the electrolyte also provides an ion channel, or carrier, allowing ions to move freely therein to achieve electrical conduction between the electrode plates. The liquid injection hole 3201 is provided on the outer casing 32 to facilitate the addition of electrolyte into the outer casing 32.

[0104] As an example, the liquid injection hole 3201 can be provided on the housing 321. Of course, the liquid injection hole 3201 can also be provided on the end cap 322.

[0105] In some embodiments, the battery cell 300 includes electrode terminals 33. The electrode terminals 33 are provided on the outer casing 32 and are connected to the tabs 312 of the electrode assembly 31. The electrode terminals 33 refer to conductive members provided on the outer casing 32, and the electrode terminals 33 are connected to the tabs 312 of the electrode assembly 31 to output the electrical energy of the battery cell 300 or charge the battery cell 300. Generally, there are two electrode terminals 33 of the battery cell 300, and the two electrode terminals 33 are respectively a positive electrode terminal 331 and a negative electrode terminal 332. The positive electrode terminal 331 is connected to the positive tab 3121 of the electrode assembly 31, and the negative electrode terminal 332 is connected to the negative tab 3122 of the electrode assembly 31.

[0106] In some embodiments, the battery cell 300 further includes adapter plates 34. Generally, there are two adapter plates 34, corresponding to the two electrode terminals 33 respectively. Each tab 312 is connected to the corresponding electrode terminal 33 through the adapter plate 34 to facilitate the connection between the tab 312 and the electrode terminal 33 and make the connection more stable. The two adapter plates 34 are respectively a positive adapter plate 341 and a negative adapter plate 342. The positive adapter plate 341 connects the positive tab 3121 and the positive electrode terminal 331, and the negative adapter plate 342 connects the negative tab 3122 and the negative electrode terminal 332.

[0107] In some embodiments, the battery cell 300 includes an insulating film 35. The insulating film 35 is disposed around the electrode assembly 31 to bind the electrode assembly 31, thereby facilitating the installation of the electrode assembly 31 into the outer casing 32. And the insulating film 35 can also protect the electrode assembly 31. The insulating film 35 can be made of insulating materials such as polypropylene and polyethylene to well insulate the electrode assembly 31 from the outer casing 32 and reduce the risk of internal short circuit of the battery cell 300.

[0108] In some embodiments, the battery cell 300 further includes a pallet 36, which is installed in the housing 32 to support the electrode assembly 31. By providing the pallet 36, the electrode assembly 31 can be better supported, and deformation of the edge of the electrode assembly 31 caused by the rounded corners of the edge of the housing 32 can be reduced. The pallet 36 can be made of materials such as ceramics, plastics, and silica gels.

[0109] Please refer to Figures 4 to 10 , in some embodiments of the present application, the present application provides a battery device 200, including a box body 20, a plurality of battery cells 300, and an integrated board 40; a receiving space 201 is provided inside the box body 20; the plurality of battery cells 300 are disposed in the receiving space 201, the battery cell 300 includes a housing 32, the housing 32 has a first surface 320, and electrode terminals 33 are protrudingly provided on the first surface 320; the integrated board 40 is disposed on the side where the first surface 320 is located; the integrated board 40 includes a bus bar member 41 for connecting the electrode terminals 33 and a pressing plate 42 for supporting the bus bar member 41, the pressing plate 42 abuts against the first surface 320, and first openings 420 are provided at positions corresponding to the respective electrode terminals 33 on the pressing plate 42, and the bus bar member 41 extends into the first openings 420 to be connected to the corresponding electrode terminals 33.

[0110] The box body 20 refers to a shell structure that forms the outline of the battery device 200. The receiving space 201 refers to the space formed inside the box body 20 for receiving structures such as the battery cells 300.

[0111] The battery cell 300 is the smallest energy storage and release unit in the battery device 200. The battery cell 300 being disposed in the receiving space 201 means that the battery cell 300 is installed in the box body 20, and the box body 20 supports and protects the battery cell 300.

[0112] The housing 32 refers to a shell structure that forms the outer contour of the battery cell 300. The first surface 320 refers to a side surface of the housing 32. As an example, when the housing 32 includes an end cap 322 and a housing body 321, the first surface 320 can be the side of the end cap 322 facing away from the housing body 321. As an example, when the housing 32 includes an end cap 322 and a housing body 321, the first surface 320 can also be the side of the housing body 321 facing away from the end cap 322. As an example, the first surface 320 can also be other surfaces on the housing 32. In this embodiment, it specifically refers to the side surface of the housing 32 where the electrode terminals 33 are provided. The electrode terminal 33 refers to a conductive member that is connected to the tab 312 of the electrode assembly 31 on the battery cell 300 and extends outside the housing 32 to connect to an external circuit, thereby realizing the charging and discharging of the battery cell 300. The part of the first surface 320 of the battery cell 300 outside the electrode terminals 33 forms the shoulder of the battery cell 300.

[0113] The integrated board 40 refers to a board member that integrates multiple functional structures.

[0114] The bus bar 41 refers to a conductive part used to conduct current to realize the charging and discharging of the battery cell 300. The bus bar 41 can be made of metal materials such as aluminum bars and copper bars to have good structural strength and facilitate connection with the electrode terminal 33. The bus bar 41 can be set in shapes such as sheet, plate, and block.

[0115] The pressing plate 42 refers to a plate part that forms the main support structure of the integrated board 40. The pressing plate 42 can be made of materials such as plastic, bakelite, and ceramic. The shape of the pressing plate 42 can be set according to the overall shape of the arrangement of the battery cells 300 in the box body 20 so that the pressing plate 42 can abut against the first surface 320 of each battery cell 300 to fix the battery cell 300.

[0116] The first opening 420 is a through-hole structure provided on the pressing plate 42. After the pressing plate 42 is installed in the box body 20, the electrode terminal 33 of the battery cell 300 can extend into the first opening 420 so that the pressing plate 42 can abut against the first surface 320 of the battery cell 300 to make full use of the space of the shoulder of the battery cell 300. In this way, when the structural strength of the pressing plate 42 is certain, the overall thickness of the pressing plate 42 can be set smaller to improve the space utilization rate of the battery device 200 and increase the volume energy density of the battery device 200.

[0117] The bus bar 41 is supported on the pressing plate 42, and the bus bar 41 is fixed and supported by the pressing plate 42 to facilitate the assembly of the bus bar 41. The bus bar 41 extends into the first opening 420 so that the bus bar 41 is connected to the electrode terminal 33 of the corresponding battery cell 300.

[0118] In the technical solution of the embodiment of the present application, by providing the pressing plate 42 to support the bus bar 41, and the first opening 420 is provided on the pressing plate 42 to supply the electrode terminal 33 to extend into and connect with the bus bar 41 to improve the integration degree, reduce the number of components, and facilitate assembly; and by abutting the pressing plate 42 against the first surface 320 of the battery cell 300, the space on the first surface 320 of the battery cell 300 within the height range where the electrode terminal 33 extends out of the first surface 320 can be fully utilized to improve the structural strength of the pressing plate 42, so as to reduce the overall height of the pressing plate 42, the battery cell 300, and the bus bar 41 and increase the space energy density of the battery device 200.

[0119] Please refer to Figures 2 to 5 , the battery device 200 has a height direction Z, a width direction Y, and a length direction X. The box body 20 defines the outer contour of the battery device 200. The height direction Z of the battery device 200 is also the height direction of the box body 20. The width direction Y of the battery device 200 is also the width direction of the box body 20. The length direction X of the battery device 200 is also the length direction of the box body 20.

[0120] In some embodiments, the first surface 320 of the battery cell 300 may be located on the top surface of the battery cell 300 along the height direction Z, such that the integrated board 40 is disposed between the battery cell 300 and the box cover 21.

[0121] In some embodiments, the first surface 320 of the battery cell 300 may be located on the bottom surface of the battery cell 300 along the height direction Z, such that the integrated board 40 is disposed between the battery cell 300 and the bottom plate 22.

[0122] In some embodiments, the first surface 320 may also be other surfaces of the battery cell 300. For example, the first surface 320 may be a side surface of the battery cell 300 perpendicular to the height direction Z.

[0123] In some embodiments, referring to Figure 4 and Figure 5 , the first surface 320 is adhesively connected to the pressing plate 42. That is to say, the first surface 320 of the battery cell 300 and the corresponding pressing plate 42 are connected and fixed through an adhesive structure. For example, the pressing plate 42 and the first surface 320 may be adhesively fixed through double-sided tape, structural adhesive, etc., so as to connect a plurality of battery cells 300 into an integral body through the pressing plate 42, thereby enhancing the structural strength of the battery device 200.

[0124] Through the above technical solution, by adhesively connecting the first surface 320 of each battery cell 300 to the pressing plate 42, a plurality of battery cells 300 can be connected into an integral body through the pressing plate 42, thereby enhancing the overall structural strength of the battery device 200.

[0125] In some embodiments, referring to Figures 5 to 8 , a sampling line (not shown in the figure) for transmitting electrical signals is provided on the pressing plate 42.

[0126] The sampling line refers to a wire for collecting the electrical signals of the battery cell 300. By providing the sampling line on the pressing plate 42, it is convenient to sample and monitor the state of the battery cell 300, and to grasp the charging and discharging conditions of the battery cell 300 in real time, thereby improving the safety and reliability of the system. As an example, by arranging a preset path on the pressing plate 42, the signal transmission stability and monitoring accuracy can be improved, and the overall performance of the battery device 200 can be enhanced.

[0127] Through the above technical solution, by providing the sampling line on the pressing plate 42, the integration degree of the integrated board 40 can be further improved, which is convenient for assembly.

[0128] In some embodiments, a flexible printed circuit board (not shown in the figure) is provided on the pressing plate 42, and a sampling line is provided in the flexible printed circuit board.

[0129] The flexible circuit board is a bendable circuit board, on which sampling lines are integrated to facilitate adapting to the shape of the pressing plate 42. The use of the flexible circuit board not only improves the adaptability of the pressing plate 42, but also enhances the stability of signal transmission, and also facilitates the setting of sampling lines on the pressing plate 42.

[0130] Through the above technical solution, by setting a flexible circuit board on the pressing plate 42, it is convenient to set sampling lines on the pressing plate 42, which is convenient for processing and manufacturing.

[0131] In some embodiments, sampling lines can also be etched on the pressing plate 42.

[0132] In some embodiments, wires can also be bonded on the pressing plate 42 to form sampling lines.

[0133] In some embodiments, the flexible circuit board is bonded to the pressing plate 42, such as the flexible circuit board is bonded to the pressing plate 42 through structures such as double-sided tape and curing glue.

[0134] Through the above technical solution, it is convenient to set the flexible circuit board on the pressing plate 42, which is convenient for the installation and fixation of the flexible circuit board.

[0135] In some embodiments, the flexible circuit board and the pressing plate 42 are connected by a hot pressing process to ensure firm bonding and improve electrical conductivity.

[0136] In some embodiments, please refer to Figures 4 to 8 , a sensor (not shown in the figure) for collecting the state parameters of the battery cell 300 is further provided on the pressing plate 42, and the sensor is electrically connected to the sampling line.

[0137] The state parameters refer to key data such as the voltage, current, and temperature of the battery cell 300.

[0138] The sensor refers to a device for real-time monitoring of the state parameters of the battery cell 300.

[0139] By the sensor, the state parameters of the battery cell 300 are monitored in real time to ensure the stable operation of the battery cell 300, timely discover abnormal situations, and reduce potential risks.

[0140] Through the above technical solution, by setting a sensor on the pressing plate 42, the integration degree of the integrated board 40 can be improved, and it is convenient to detect the state parameters of the battery cell 300 through the sensor, so as to control the safe charging and discharging of the battery cell 300.

[0141] In some embodiments, please refer to Figures 4 to 8, the bus bar 41 and the pressing plate 42 are formed into an integral structure, that is to say, the bus bar 41 and the pressing plate 42 are made integrally. As an example, the pressing plate 42 is formed by injection molding, and the bus bar 41 is placed into the mold during injection molding to realize the integration of the bus bar 41 and the pressing plate 42 during the forming process, so that the bus bar 41 and the pressing plate 42 are closely combined, improving the connection strength and also facilitating processing and manufacturing.

[0142] Through the above technical solution, forming the bus bar 41 and the pressing plate 42 into an integral body can facilitate processing and manufacturing, and also facilitate the pressing plate 42 to fixedly support the bus bar 41.

[0143] In some embodiments, the bus bar 41 and the pressing plate 42 are adhesively connected. For example, the bus bar 41 can be fixed to the pressing plate 42 by means of double-sided tape, curing glue, etc. to ensure a firm connection.

[0144] Through the above technical solution, adhesively connecting the bus bar 41 and the pressing plate 42 is convenient for connection and assembly.

[0145] In some embodiments, the bus bar 41 is fixed to the pressing plate 42 by fasteners, that is to say, the bus bar 41 can be fixed to the pressing plate 42 by fasteners such as bolts and rivets.

[0146] Fixing the bus bar 41 to the pressing plate 42 by fasteners is convenient for connection and also facilitates the pressing plate 42 to fixedly support the bus bar 41.

[0147] In some embodiments, the bus bar 41 can also be fixed to the pressing plate 42 by means of welding, hot pressing, etc.

[0148] In some embodiments, please refer to Figure 9 , the integrated board 40 includes a connecting board 44, the bus bar 41 is connected to the connecting board 44, and a pressing plate 42 is connected to one side of the connecting board 44 close to the first surface 320.

[0149] The connecting board 44 refers to the board body used to connect the bus bar 41. By providing the connecting board 44, the bus bar 41 can be first connected to the connecting board 44, and then the connecting board 44 can be connected to the pressing plate 42, simplifying the assembly process, improving the structural stability, and facilitating the overall layout optimization. The connecting board 44 can be made of materials such as plastic, bakelite, and ceramic to support the bus bar 41 and then connect to the pressing plate 42. The bus bar 41 can be fixed to the connecting board 44 by means of welding, riveting, soldering, or hot pressing to facilitate connection and also facilitate connection to the pressing plate 42.

[0150] A pressing plate 42 is connected to one side of the connecting board 44 close to the first surface 320, which can facilitate the pressing plate 42 to support the connecting board 44 and also facilitate the pressing plate 42 to be connected to the first surface 320.

[0151] Through the above technical solution, the busbar 41 is connected by the connecting plate 44, and then the connecting plate 44 is connected to the pressing plate 42, which can facilitate the assembly and manufacture of the integrated board 40.

[0152] In some embodiments, please refer to Figure 9 , on the side of the connecting plate 44 facing away from the first surface 320, a pressing plate 42 is connected, that is to say, on the side of the connecting plate 44 facing away from the battery cell 300, a pressing plate 42 is provided.

[0153] Through the above technical solution, pressing plates 42 are respectively arranged on both sides of the connecting plate 44, which can improve the structural strength of the integrated board 40 and can also well protect the connecting plate 44 and the busbar 41.

[0154] In some embodiments, please refer to Figure 9 , the connecting plate 44 and the pressing plate 42 form an integral structure, that is to say, the connecting plate 44 and the pressing plate 42 can be manufactured as an integral structure. As an example, after the busbar 41 is assembled on the connecting plate 44, it can be placed in the injection mold of the pressing plate 42, and then the pressing plate 42 is injection-molded to connect and fix the pressing plate 42 to the connecting plate 44 and the busbar 41. As an example, the connecting plate 44 can be bonded to the pressing plate 42 to form an integral structure.

[0155] Through the above technical solution, forming the connecting plate 44 and the pressing plate 42 into one body is convenient for connection and can also improve the connection strength between the connecting plate 44 and the pressing plate 42.

[0156] In some embodiments, the connecting plate 44 and the pressing plate 42 can also be fixed by ultrasonic welding. As an example, the connecting plate 44 and the pressing plate 42 can also be fixedly connected by bonding, hot pressing, riveting and other methods.

[0157] In some embodiments, a pressure relief mechanism 3202 is provided on the outer shell 32, and the pressure relief mechanism 3202 is used to release the internal pressure when the internal pressure or temperature of the battery cell 300 reaches a threshold value. The pressure relief mechanism 3202 can be a structure such as an explosion-proof valve or an explosion-proof sheet provided on the outer shell 32.

[0158] In some embodiments, the pressure relief mechanism 3202 is located on the first surface 320, and a second opening (not shown in the figure) is provided on the pressing plate 42 corresponding to the position of the pressure relief mechanism 3202.

[0159] The second opening refers to a through-hole structure provided on the pressing plate 42. When the pressing plate 42 is installed in the box body 20, the second opening is located at the position corresponding to the pressure relief mechanism 3202 on the battery cell 300, so that when the pressure relief mechanism 3202 works, the internal pressure can be smoothly released through the second opening.

[0160] Through the above technical solution, a second opening is provided to expose the pressure relief mechanism 3202 on the battery cell 300, so that the pressure relief mechanism 3202 can relieve pressure and improve the safety of the battery cell 300.

[0161] In some embodiments, please refer to Figure 5 and Figure 10 , the bus bar 41 includes a support portion 411 and a connection portion 412. The connection portion 412 is connected to the support portion 411. The support portion 411 is fixedly connected to the pressing plate 42. The connection portion 412 at least partially extends into the first opening 420, and the connection portion 412 is connected to the electrode terminal 33.

[0162] The support portion 411 refers to the main part of the bus bar 41. The support portion 411 is fixedly connected to the pressing plate 42, and the support portion 411 is supported by the pressing plate 42, thereby supporting the bus bar 41.

[0163] The connection portion 412 refers to a partial structure on the bus bar 41 for connecting to the electrode terminal 33. The connection portion 412 is connected to the support portion 411 so that the support portion 411 supports the connection portion 412. The connection portion 412 is provided to facilitate connection to the electrode terminal 33 and ensure stable current transmission. As an example, the connection portion 412 and the electrode terminal 33 can be connected by welding. As an example, the connection portion 412 and the electrode terminal 33 can also be fixedly connected by bolts.

[0164] The connection portion 412 at least partially extending into the first opening 420 means that a part of the connection portion 412 is located within the first opening 420, or the connection portion 412 is entirely within the first opening 420.

[0165] Through the above technical solution, the support portion 411 is provided to facilitate the connection and fixation between the bus bar 41 and the pressing plate 42; the connection portion 412 is provided to facilitate the connection between the bus bar 41 and the electrode terminal 33 of the battery cell 300 for the manufacture and assembly use of the integrated board 40.

[0166] In some embodiments, the middle part of the connection portion 412 is located within the first opening 420, and both ends of the connection portion 412 are fixedly connected to the pressing plate 42 respectively, so as to facilitate the pressing plate 42 to stably connect the connection portion 412 and facilitate the fixed connection between the connection portion 412 and the corresponding electrode terminal 33.

[0167] In some embodiments, one end of the connection portion 412 close to the support portion 411 can also be connected to the pressing plate 42, while the other end of the connection portion 412 is suspended in the first opening 420 as a free end, so that when connecting to the electrode terminal 33, the connection portion 412 can undergo a certain amount of elastic deformation to facilitate connection to the electrode terminal 33.

[0168] In some embodiments, please refer to Figure 5, the distance from the connecting portion 412 to the first surface 320 is less than or equal to the distance from the supporting portion 411 to the first surface 320.

[0169] The distance from the connecting portion 412 to the first surface 320 refers to the spacing between the connecting portion 412 and the first surface 320.

[0170] The distance from the supporting portion 411 to the first surface 320 refers to the spacing between the supporting portion 411 and the first surface 320.

[0171] When the distance from the connecting portion 412 to the first surface 320 is equal to the distance from the supporting portion 411 to the first surface 320, the bus bar 41 can be set to a flat plate structure for convenient manufacturing.

[0172] When the distance from the connecting portion 412 to the first surface 320 is less than the distance from the supporting portion 411 to the first surface 320, the connecting portion 412 is set to sink toward the side of the electrode terminal 33 from the supporting portion 411. Correspondingly, the thickness of the portion of the pressing plate 42 on the side of the supporting portion 411 close to the first surface 320 is set to be greater than the thickness of the portion of the connecting portion 412 close to the first surface 320, and the portion of the pressing plate 42 on the side of the supporting portion 411 close to the first surface 320 is connected to the first surface 320 of the battery cell 300. In this way, the structural strength of the portion of the pressing plate 42 connected to the first surface 320 can be higher to improve the overall structural strength of the battery device 200. In addition, this structure also facilitates the connection between the connecting portion 412 and the electrode terminal 33 with a smaller height, so that the electrode terminal 33 with a smaller height can be adapted while meeting the structural strength of the integrated board 40, and further, the overall occupied space of the battery cell 300 and the integrated board 40 is smaller, and the volume energy density of the battery device 200 is improved.

[0173] Through the above technical solution, setting the connecting portion 412 closer to the first surface 320 relative to the supporting portion 411 can make the thickness of the pressing plate 42 on the side of the supporting portion 411 close to the battery cell 300 larger to increase the structural strength of the connection with the first surface 320 of the battery cell 300.

[0174] In some embodiments, please refer to Figure 10 , the distance from the connecting portion 412 to the first surface 320 is greater than the distance from the supporting portion 411 to the first surface 320.

[0175] When the distance from the connecting portion 412 to the first surface 320 is greater than the distance from the supporting portion 411 to the first surface 320, the connecting portion 412 protrudes from the supporting portion 411 toward the side away from the electrode terminal 33. Correspondingly, the supporting portion 411 is arranged closer to the battery cell 300 relative to the connecting portion 412. This makes the thickness of the portion of the pressing plate 42 on the side of the supporting portion 411 away from the first surface 320 greater than the thickness of the portion of the connecting portion 412 away from the first surface 320. And the portion of the pressing plate 42 on the side of the supporting portion 411 away from the first surface 320 separates the side wall of the separation box body 20 from the supporting portion 411. By setting the thickness of the portion of the pressing plate 42 on the side of the supporting portion 411 away from the first surface 320 to be larger, the supporting portion 411 can be better isolated from the box body 20.

[0176] Through the above technical solution, setting the supporting portion 411 closer to the first surface 320 relative to the connecting portion 412 can make the thickness of the portion of the pressing plate 42 on the side of the supporting portion 411 away from the battery cell 300 larger, and better isolate the supporting portion 411 from the corresponding side wall of the box body 20.

[0177] In some embodiments, please refer to Figure 4 , the integrated board 40 is one, and the first surfaces 320 of each battery cell 300 are all connected to the pressing plate 42 of the integrated board 40. That is to say, the integrated board 40 covers each battery cell 300 of the battery device 200. In this way, during assembly, each battery cell 300 can be connected to the integrated board 40, thereby simplifying the assembly process and improving the assembly efficiency. In addition, all the battery cells 300 in the box body 20 can be connected into a whole through the integrated board 40 to enhance the structural strength of the battery device 200.

[0178] Through the above technical solution, setting the integrated board 40 as one can reduce the number of components, reduce the assembly process, and improve the assembly efficiency.

[0179] In some embodiments, there are multiple integrated boards 40, and the multiple integrated boards 40 cooperate to cover all the battery cells 300 in the box body 20.

[0180] Multiple means two or more. Setting the integrated board 40 as multiple can make each integrated board 40 smaller in size, so as to reduce the area of each integrated board 40, which is convenient for the production of each integrated board 40. It can also facilitate setting the number and layout of the integrated boards 40 according to the size of the battery device 200, and flexibly adapt to the requirements of different battery devices 200.

[0181] The multiple integrated boards 40 cooperate to cover all the battery cells 300 in the box body 20, which can make each battery cell 300 connected to one integrated board 40, facilitating the electrical connection and management of multiple battery cells 300.

[0182] With the above technical solution, multiple integrated boards 40 can be provided, which facilitates the processing and manufacturing of the integrated boards 40.

[0183] In some embodiments of the present application, an embodiment of the present application provides a battery device 200, including a box body 20, a plurality of battery cells 300, and an integrated board 40; a receiving space 201 is provided in the box body 20; the plurality of battery cells 300 are arranged in the receiving space 201, the battery cell 300 includes a housing 32, the housing 32 has a first surface 320, and an electrode terminal 33 protrudes from the first surface 320; the integrated board 40 is arranged on the side where the first surface 320 is located; the integrated board 40 includes a bus bar 41 for connecting the electrode terminals 33 and a pressing plate 42 for supporting the bus bar 41, the bus bar 41 and the pressing plate 42 are injection-molded into an integral structure, each first surface 320 is adhesively connected to the pressing plate 42, and a first opening 420 is provided at a position corresponding to each electrode terminal 33 on the pressing plate 42, and the bus bar 41 extends into the first opening 420 to be connected to the corresponding electrode terminal 33. A flexible printed circuit board is provided on the pressing plate 42, and a sampling line is provided in the flexible printed circuit board.

[0184] Injection-molding the bus bar 41 on the pressing plate 42 can facilitate the processing and manufacturing of the integrated board 40. A sampling line is provided on the integrated board 40 to facilitate monitoring the state information of the battery cell 300. And a first opening 420 is provided on the pressing plate 42 to allow the electrode terminal 33 to extend into and be connected to the bus bar 41, so as to improve the integration degree, reduce the number of components, and facilitate assembly; and pressing the pressing plate 42 against the first surface 320 of the battery cell 300 can make full use of the space in the height range where the electrode terminal 33 protrudes from the first surface 320 on the first surface 320 of the battery cell 300, so as to improve the structural strength of the pressing plate 42, reduce the overall height of the pressing plate 42, the battery cell 300 and the bus bar 41, and improve the space energy density of the battery device 200.

[0185] In some embodiments of the present application, the present application further provides an electrical device, including the battery device 200 as described in the above embodiments, and the battery device 200 is used for storing or providing electrical energy.

[0186] In some embodiments, the battery device 200 provided by the embodiments of the present application can also be applied to an energy storage device. For example, the battery device 200 can provide electrical energy for an energy storage device, such as an energy storage cabinet or an energy storage container.

[0187] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A box body with a receiving space provided therein; A plurality of battery cells disposed in the receiving space, each battery cell including a housing having a first surface, and electrode terminals protruding from the first surface; An integrated board disposed on the side where the first surface is located; The integrated board includes a busbar for connecting the electrode terminals and a pressing plate for supporting the busbar. The pressing plate abuts against the first surface, and first openings are provided at positions corresponding to the respective electrode terminals on the pressing plate. The busbar extends into the first openings to be connected to the corresponding electrode terminals.

2. The battery device according to claim 1, wherein The first surface is adhesively connected to the pressing plate.

3. The battery device according to claim 1, characterized in that, Sampling lines for conducting electrical signals are provided on the pressing plate.

4. The battery device according to claim 3, characterized in that A flexible printed circuit board is provided on the pressing plate, and the sampling lines are provided in the flexible printed circuit board.

5. The battery device according to claim 4, wherein The flexible printed circuit board is adhesively connected to the pressing plate.

6. The battery device according to claim 3, characterized in that, Sensors for collecting state parameters of the battery cells are further provided on the pressing plate, and the sensors are electrically connected to the sampling lines.

7. The battery device according to any one of claims 1 to 6, characterized in that, The busbar and the pressing plate form an integral structure, or the busbar is adhesively connected to the pressing plate, or the busbar is fixed to the pressing plate by fasteners.

8. The battery device according to any one of claims 1-6, characterized in that, The integrated board includes a connecting plate, the busbar is connected to the connecting plate, and the pressing plate is connected to one side of the connecting plate close to the first surface.

9. The battery device according to claim 8, wherein, The pressing plate is connected to the side of the connecting plate facing away from the first surface.

10. The battery device according to claim 8, wherein, The connecting plate and the pressing plate form an integral structure.

11. The battery device according to any one of claims 1-6, characterized in that, A pressure relief mechanism is provided on the housing, the pressure relief mechanism is located on the first surface, and a second opening is provided at a position on the pressing plate corresponding to the pressure relief mechanism.

12. The battery device according to any one of claims 1-6, characterized in that, The busbar includes a supporting portion and a connecting portion, the connecting portion is connected to the supporting portion, the supporting portion is fixedly connected to the pressing plate, at least a part of the connecting portion extends into the first opening, and the connecting portion is connected to the electrode terminal.

13. The battery device according to claim 12, characterized in that, The distance from the connecting portion to the first surface is less than or equal to the distance from the supporting portion to the first surface.

14. The battery device according to claim 12, characterized in that, The distance from the connecting portion to the first surface is greater than the distance from the supporting portion to the first surface.

15. The battery device according to any one of claims 1-6, characterized in that, There is one integrated board, and the first surfaces of all the battery cells are connected to the pressing plate of the integrated board.

16. The battery device according to any one of claims 1-6, characterized in that, There are multiple integrated boards, and the multiple integrated boards cooperate to cover all the battery cells in the box body.

17. An electrical device, characterized in that, Including the battery device according to any one of claims 1-16, the battery device is used to provide electrical energy.

Images