Battery device, isolation plate assembly and power utilization device

Abstract

The utility model relates to a battery device, an isolation plate assembly and a power utilization device. The battery device includes a plurality of battery cells having electrode terminals and a separator assembly. The isolation plate assembly comprises an isolation plate and an electric connecting piece, and the isolation plate is provided with a plurality of through holes penetrating through the isolation plate in the thickness direction. And the electric connecting sheets are arranged on the isolation plate and are connected with the electrode terminals of the corresponding battery monomers through the through holes. Wherein the electric connection sheet and the isolation plate are of an integrated structure, and the two opposite ends of the electric connection sheet are arranged in the isolation plate. The isolation plate and the electric connection sheet of the isolation plate assembly are constructed into an integrated structure, so that the connection firmness between the isolation plate and the electric connection sheet is improved, the electric connection sheet can be prevented from falling off from the isolation plate, and the reliability of the electric conduction function of the electric connection sheet to the electrode terminal is improved. Moreover, due to the integrated structure, the step of assembling the isolation plate and the electric connecting sheet is omitted, and the assembling time is saved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to battery devices, separator assemblies, and electrical devices. Background Art

[0002] The separator assembly is an important component in a battery device, including a separator and an electrical connection piece. The electrical connection piece is disposed on the separator to achieve the function of conduction. The battery cells of the battery device have electrode terminals, and the electrode terminals are connected to the electrical connection piece to achieve series or parallel connection between the electrode cells. Generally, when the separator and the electrical connection piece are assembled, there is a risk that the electrical connection piece falls off the separator. Summary of the Utility Model

[0003] In view of the above problems, this application provides a battery device, a separator assembly, and an electrical device. By setting the electrical connection piece and the separator as an integral structure, the assembly step between the two is omitted, and at the same time, the connection firmness between the two is improved, which is beneficial to preventing the electrical connection piece from falling off the separator.

[0004] In a first aspect, this application provides a battery device, including:

[0005] A plurality of battery cells, each battery cell having an electrode terminal;

[0006] A separator assembly, including:

[0007] A separator, provided with a plurality of through holes penetrating the separator in the thickness direction;

[0008] An electrical connection piece, disposed on the separator, and the electrical connection piece is connected to the electrode terminal of the corresponding battery cell through the through hole;

[0009] Wherein, the electrical connection piece and the separator are constructed as an integral structure, and opposite ends of the electrical connection piece are disposed within the separator.

[0010] In the battery device provided by the embodiments of this application, by constructing the separator and the electrical connection piece of the separator assembly as an integral structure, the connection firmness between the separator and the electrical connection piece is improved, which is beneficial to preventing the electrical connection piece from falling off the separator, thereby improving the reliability of the electrical connection piece for the conduction function of the electrode terminal. By further disposing opposite ends of the electrical connection piece within the separator, the separator fixes the opposite ends of the electrical connection piece, thereby further improving the connection firmness of the electrical connection piece on the separator. Moreover, the integral structure omits the assembly step of the separator and the electrical connection piece, which is beneficial to saving assembly time.

[0011] In some embodiments, the electrical connection piece includes a contact portion exposed through the through hole for corresponding connection with the electrode terminal.

[0012] The battery device provided by the embodiment of the present application realizes the electrical connection between the electrical connection sheet and the corresponding electrode terminal by providing a contact portion exposed through the through hole.

[0013] In some embodiments, the electrical connection sheet further includes a fixing portion connected to the contact portion;

[0014] The fixing portion and the separator are configured as an integral structure.

[0015] The battery device provided by the embodiment of the present application realizes the connection and fixation of the contact portion by providing a fixing portion integrated with the separator, so as to fix the contact portion at a position in contact with the corresponding electrode terminal.

[0016] In some embodiments, the fixing portion is disposed within the separator.

[0017] The battery device provided by the embodiment of the present application is beneficial to ensuring a firm connection between the fixing portion and the separator by disposing the fixing portion within the separator.

[0018] In some embodiments, the fixing portion and the separator are configured as an injection-molded integral structure or a compression-molded integral structure.

[0019] In the battery device provided by the embodiment of the present application, during injection molding or compression molding, the fixing member is also integrally formed with the separator synchronously, so as to process a complete separator assembly at one time.

[0020] In some embodiments, the contact portion protrudes relative to the fixing portion in the direction towards the battery cell.

[0021] The battery device provided by the embodiment of the present application is convenient for connecting with the corresponding electrode terminal by providing the contact portion protruding towards the battery cell.

[0022] In some embodiments, the surface of the contact portion facing the battery cell protrudes from the surface of the separator facing the battery cell.

[0023] The battery device provided by the embodiment of the present application can keep a certain gap between the first fixing portion and the second fixing portion and the end face of the battery cell.

[0024] In some embodiments, the contact portion is flush with the surface of the fixing portion facing the battery cell.

[0025] The battery device provided by the embodiment of the present application has a flat structure for the electrical connection sheet, which can save the processing step of stamping and bending the contact portion, and the processing is more convenient. Moreover, when the fixing portion is disposed within the separator, a certain gap will be maintained between the contact portion and the surface of the separator facing the battery cell, and the electrode terminal can extend into the through hole, which is beneficial to reducing the distance between the separator and the battery cell, thereby reducing the occupied space after the separator assembly and the battery cell are assembled.

[0026] In some embodiments, the electrode terminal extends into the through hole to contact the contact portion;

[0027] The separator can abut against the battery cell.

[0028] The battery device provided in the embodiment of the present application can further reduce the space occupied by the isolation plate assembly and the battery cell after assembly, and is also conducive to connecting the isolation plate and the battery cell, so that the isolation plate can be firmly installed at the end of the battery cell.

[0029] In some embodiments, the electrical connection sheet includes two contact portions disposed at intervals;

[0030] The two contact portions are respectively connected to the electrode terminals of two adjacent battery cells.

[0031] The battery device provided in the embodiment of the present application realizes electrical connection between two battery cells by providing two spaced contact portions on the electrical connection sheet.

[0032] In some embodiments, the fixing portion includes a first fixing portion and a second fixing portion;

[0033] The first fixing portion connects the two contact portions, and the second fixing portion is connected to an end of the contact portion away from the first fixing portion.

[0034] The battery device provided in the embodiment of the present application connects the two contact parts by providing a first fixing part, and fixes the two contact parts by integrally connecting the first fixing part and the second fixing part with the isolation plate.

[0035] In some embodiments, a surface of the contact portion facing away from the battery cell is provided with a positioning portion;

[0036] The positioning part is used to determine the position information of the contact part.

[0037] In the battery device provided in the embodiment of the present application, when the contact portion is connected to a conductor such as an external cable, the positioning portion determines the position information of the contact portion so as to accurately connect the cable to the contact portion, thereby achieving automated connection between the cable and the contact portion.

[0038] In some embodiments, the positioning portion is configured as a plurality of positioning holes on the contact portion.

[0039] The battery device provided in the embodiment of the present application can determine the specific position of the contact portion by identifying the positions of the plurality of positioning holes.

[0040] In some embodiments, the isolation plate assembly further comprises:

[0041] The fixing piece is arranged on the isolation plate and is used to fix the isolation plate and the battery cell.

[0042] The battery device provided by the embodiment of the present application can firmly mount the separator and the battery cell in the box through the fixing member, preventing the separator and the battery cell from moving randomly in the box, so as to improve the working reliability of the battery device.

[0043] In some embodiments, the fixing member and the separator are configured as an integral structure;

[0044] The fixing member is arranged in the separator, and both ends of the fixing member extend to the outside of the separator. The battery device further includes a box body, and the battery cell and the separator assembly are arranged in the box body. Both ends of the fixing member are connected to the box body.

[0045] The battery device provided by the embodiment of the present application can firmly connect the fixing member to the separator, which is beneficial to improving the firmness of the fixing member in fixing the separator and the battery cell. Moreover, the integral structure is beneficial to preventing the loss of the fixing member and is more convenient for storage and use.

[0046] In a second aspect, the present application provides a separator assembly, which includes:

[0047] A separator, provided with a plurality of through holes penetrating the separator in the thickness direction;

[0048] An electrical connection piece, arranged on the separator, and the electrical connection piece is connected to the electrode terminal of the corresponding battery cell through the through hole;

[0049] Wherein, the electrical connection piece and the separator are configured as an integral structure, and both opposite ends of the electrical connection piece are arranged in the separator.

[0050] In some embodiments, the separator assembly further includes:

[0051] A fixing member, the fixing member and the separator are configured as an integral structure, the fixing member is arranged in the separator, and both ends of the fixing member extend to the outside of the separator.

[0052] In a third aspect, the present application provides an electrical device, including the battery device in the above embodiment.

[0053] 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 given below. Description of the Drawings

[0054] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0055] Figure 1 Structural schematic diagram of a vehicle according to some embodiments of the present application;

[0056] Figure 2 Exploded structural schematic diagram of a battery device according to some embodiments of the present application;

[0057] Figure 3 Internal structural schematic diagram of a battery device according to some embodiments of the present application;

[0058] Figure 4 Top - view structural schematic diagram of a battery device according to some embodiments of the present application;

[0059] Figure 5 is Figure 4 Cross - sectional view taken along line A - A in

[0060] Figure 6 is Figure 5 Enlarged structural diagram at position B in

[0061] Figure 7 is Figure 4 Enlarged structural diagram at position E in

[0062] Figure 8 Structural schematic diagram of an injection - molded separator assembly according to some embodiments of the present application;

[0063] Figure 9 Structural schematic diagram of a compression - molded separator assembly according to some embodiments of the present application.

[0064] Reference numerals in the detailed description are as follows:

[0065] 1000, vehicle;

[0066] 100, battery device; 10, box body; 11, first part; 12, second part; 20, battery cell; 21, electrode terminal; 200, controller; 300, motor;

[0067] 40, separator assembly; 41, separator; 411, through - hole; 412, top - layer fiber cloth; 413, bottom - layer fiber cloth; 42, electrical connection piece; 421, contact part; 4211, positioning hole; 422, first fixing part; 423, second fixing part; 43, fixing member. Detailed description

[0068] Hereinafter, embodiments of the technical solutions of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and thus are only examples and should not be used to limit the protection scope of the present application.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0070] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0071] Reference to "an 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 this application. The phrase does not necessarily refer to the same embodiment at every occurrence in the specification, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0072] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0073] In the description of the embodiments of this application, the term "a plurality" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0074] In the description of the embodiments of this 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 this application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of this application.

[0075] In the description of the embodiments of the present application, unless otherwise clearly specified and 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 an integral one; 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 situations.

[0076] At present, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in many fields such as military equipment and aerospace. With the continuous expansion of the application fields of batteries, the market demand is also constantly increasing.

[0077] A battery device generally includes a box body and a plurality of battery cells, and the plurality of battery cells are arranged in sequence in the box body. Each battery cell has electrode terminals, and the electrode terminals generally face the same side. An isolation plate assembly is generally arranged on one side of the electrode terminals of the plurality of battery cells. The isolation plate assembly includes an isolation plate and an electrical connection piece. The electrical connection piece is arranged on the isolation plate and is connected to the battery terminal to achieve the function of conducting electricity.

[0078] In a traditional isolation plate assembly, the electrical connection piece is generally connected to the isolation plate through assembly methods such as buckles, thermal riveting posts, and mushroom heads. The connection strength between the two is not high, and the electrical connection piece is likely to fall off the isolation plate during transportation or use.

[0079] Based on the above considerations, in order to solve the problem that the electrical connection piece is likely to fall off the isolation plate, the inventor has conducted in-depth research and designed an isolation plate assembly. By setting the electrical connection piece and the isolation plate as an integral structure and arranging the opposite ends of the electrical connection piece inside the isolation plate, the connection firmness between the two is improved, and the electrical connection piece is prevented from falling off the isolation plate. At the same time, the assembly steps between the electrical connection piece and the isolation plate are also omitted, saving assembly time.

[0080] The battery device with an isolation plate assembly for isolating battery cells and wires and other structures disclosed in the embodiments of the present application can be but is not limited to being used in electrical devices such as vehicles, ships, or aircraft. Specifically, the electrical device can be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0081] For the convenience of description, the following embodiments will take an electrical device in an embodiment of the present application, a vehicle 1000, as an example for description.

[0082] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle 1000 provided in some embodiments of the present application. Taking the electrical device as the vehicle 1000 as an example, the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0083] In some embodiments, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0084] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of the battery device 100 provided in some embodiments of the present application. In some embodiments, the battery device 100 includes a box body 10 and battery cells 20, and the battery cells 20 are accommodated in the box body 10.

[0085] The box body 10 is used to provide an accommodation space for the battery cells 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define an accommodation space for accommodating the battery cells 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-like structure. The first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 jointly define the accommodation space; the first part 11 and the second part 12 can also both be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0086] Please refer to Figure 2, in the battery device 100, there may be multiple battery cells 20. The multiple battery cells 20 can be connected in series, parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, parallel, or in a combined series-parallel connection with each other, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10. Of course, in the battery device 100, multiple battery cells 20 can also be first connected in series, parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box 10. The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component for realizing the electrical connection among the multiple battery cells 20.

[0087] Please refer to Figure 3 , Figure 3 is a schematic diagram of the internal structure of the battery device 100 provided by some embodiments of the present application. The present application provides a battery device 100, which includes multiple battery cells 20 and a separator assembly 40. The battery cell 20 has electrode terminals 21. The separator assembly 40 includes a separator 41 and an electrical connection piece 42. The separator 41 is provided with a plurality of through holes 411 penetrating through the separator 41 in the thickness direction (refer to Figure 6 as shown); the electrical connection piece 42 is disposed on the separator 41, and the electrical connection piece 42 is connected to the electrode terminal 21 of the corresponding battery cell 20 through the through hole 411. Among them, the electrical connection piece 42 and the separator 41 are constructed as an integral structure, and opposite ends of the electrical connection piece 42 are disposed within the separator 41.

[0088] As Figure 3 shown in, in the figure, the X direction is the length direction of the battery device 100, the Y direction is the width direction of the battery device 100, and the Z direction is the thickness direction of the battery device 100.

[0089] The multiple battery cells 20 are arranged in rows in sequence along the X direction within the box 10 and are arranged in multiple rows along the Y direction. The electrode terminals 21 of all the battery cells 20 face the same direction, and the separator assembly 40 is disposed at the end having the electrode terminals 21. External wires or other connection structures can be directly connected to the electrical connection piece 42 to realize the electrical connection with the electrode terminals 21.

[0090] The battery device 100 provided by the embodiment of the present application constructs the separator 41 and the electrical connection piece 42 of the separator assembly 40 into an integral structure, which improves the connection firmness between the separator 41 and the electrical connection piece 42, is conducive to preventing the electrical connection piece 42 from falling off the separator 41, and thus improves the reliability of the electrical connection function of the electrical connection piece 42 to the electrode terminal 21. By further arranging the opposite ends of the electrical connection piece 42 inside the separator 41, the separator 41 fixes the opposite ends of the electrical connection piece 42, thereby further improving the connection firmness of the electrical connection piece 42 on the separator 41. Moreover, the integral structure eliminates the assembly steps of the separator 41 and the electrical connection piece 42, which is conducive to saving assembly time.

[0091] Refer to Figures 4 - 6 , Figure 4 which is a top view structural schematic diagram of the battery device 100 provided by some embodiments of the present application; Figure 5 is Figure 4 a cross-sectional view taken along line A-A in Figure 6 is Figure 5 an enlarged structural diagram at position B in

[0092] In some embodiments, the electrical connection piece 42 includes a contact portion 421 that is exposed through the through hole 411 for corresponding connection with the electrode terminal 21. By providing the contact portion 421 exposed through the through hole 411, the electrical connection between the electrical connection piece 42 and the corresponding electrode terminal 21 is realized.

[0093] Specifically, each battery cell 20 includes a positive electrode terminal and a negative electrode terminal. The positive electrode terminal and the negative electrode terminal of the same battery cell 20 need to be connected to the contact portions 421 of two different electrical connection pieces 42. Of course, a single electrical connection piece 42 can also be used to connect the positive electrode terminal of one battery cell 20 and the negative electrode terminal of another battery cell 20 respectively to realize the series connection of the two battery cells 20.

[0094] In some embodiments, the electrical connection piece 42 further includes a fixing portion connected to the contact portion 421, and the fixing portion and the separator 41 are constructed into an integral structure. By providing the fixing portion integrated with the separator 41, the connection and fixation of the contact portion 421 are realized to fix the contact portion 421 at the position in contact with the corresponding electrode terminal 21.

[0095] In some embodiments, the fixing portion is arranged inside the separator 41 to limit the fixing portion inside the separator 41 to ensure the firm connection between the fixing portion and the separator 41.

[0096] In some embodiments, in combination with Figure 3 and Figure 4As shown, the electrical connection pieces 42 on both sides along the Y direction are only connected to the electrode terminals 21 of one battery cell 20, specifically, it can be the positive electrode terminal or the negative electrode terminal. At this time, the electrical connection piece 42 includes a contact portion 421, and at least one fixing portion is provided. The fixing portion can be arranged at any end of the contact portion 421, and the contact portion 421 can be connected to the separator plate 41 through the fixing portion. Of course, in order to ensure firm connection, two fixing portions can be provided, and the two fixing portions are respectively arranged at opposite ends of the contact portion 421, and the contact portion 421 is fixed by the two fixing portions, improving the connection firmness and positioning accuracy of the contact portion 421. Of course, more than two fixing portions can also be provided, but there is no limitation here.

[0097] Continue to refer to Figure 3 and Figure 4 , except for the electrical connection pieces 42 on both sides in the middle along the Y direction, the other electrical connection pieces 42 are connected to the electrode terminals 21 of two adjacent battery cells 20, specifically, they are connected to the positive electrode terminals and negative electrode terminals of two battery cells 20.

[0098] In order to realize the connection of the two electrode terminals 21, in combination with Figure 6 , the electrical connection piece 42 includes two contact portions 421 arranged at intervals, and the two contact portions 421 are respectively connected to the electrode terminals 21 of two adjacent battery cells 20 to realize the electrical connection of the two battery cells 20.

[0099] Correspondingly, the fixing portion includes a first fixing portion 422 and a second fixing portion 423, and both the first fixing portion 422 and the second fixing portion 423 are arranged inside the separator plate 41. The first fixing portion 422 connects the two contact portions 421, and the second fixing portion 423 is connected to the end of the contact portion 421 facing away from the first fixing portion 422. That is to say, there are two second fixing portions 423, constructing the opposite ends of the electrical connection piece 42. By providing the first fixing portion 422 to connect the two contact portions 421, and integrally connecting the first fixing portion 422 and the second fixing portion 423 with the separator plate 41, the fixation of the two contact portions 421 is realized.

[0100] In some embodiments, please continue to refer to Figure 6 , the contact portion 421 protrudes along the direction towards the battery cell 20 relative to the fixing portion. Specifically, the first fixing portion 422 and the second fixing portion 423 are in the same plane, and the contact portion 421 protrudes along the direction towards the battery cell 20 relative to the first fixing portion 422 and the second fixing portion 423. In this way, the contact portion 421 can protrude towards the battery cell 20 to facilitate connection with the corresponding electrode terminal 21.

[0101] Exemplarily, the surface of the contact portion 421 facing the battery cell 20 protrudes from the surface of the separator 41 facing the battery cell 20. In this way, a certain gap can be maintained between the first fixing portion 422 and the second fixing portion 423 and the end face of the battery cell 20.

[0102] In some other embodiments, the contact portion 421 is flush with the surface of the fixing portion facing the battery cell 20. Specifically, the surfaces of the first fixing portion 422, the second fixing portion 423, and the contact portion 421 facing the battery cell 20 are located in the same plane and are parallel to the surface of the battery cell 20 facing the contact portion 421. In this way, the electrical connection piece 42 has a flat structure, and the processing step of stamping and bending the contact portion 421 can be omitted, making the processing more convenient. Moreover, when the fixing portion is disposed within the separator 41, a certain gap will be maintained between the contact portion 421 and the surface of the separator 41 facing the battery cell 20, and the electrode terminal 21 can extend into the through hole 411, which is beneficial to reducing the distance between the separator 41 and the battery cell 20, thereby reducing the occupied space after the separator assembly 40 and the battery cell 20 are assembled.

[0103] Further, the electrode terminal 21 extends into the through hole 411 to contact the contact portion 421, and the separator 41 can abut against the battery cell 20. In this way, the occupied space after the separator assembly 40 and the battery cell 20 are assembled can be further reduced, and at the same time, it is beneficial to connect the separator 41 and the battery cell 20, making the separator 41 firmly installed at the end of the battery cell 20.

[0104] Refer to Figure 4 and Figure 7 , Figure 7 is Figure 4 the enlarged structural view at E in. A positioning portion is provided on the surface of the contact portion 421 facing away from the battery cell 20, and the positioning portion is used to determine the position information of the contact portion 421. When the contact portion 421 is connected to a conductor such as an external cable, the position information of the contact portion 421 is determined through the positioning portion, so as to accurately connect the cable to the contact portion 421 and realize the automatic connection of the cable and the contact portion 421.

[0105] Specifically, the positioning portion is provided as a plurality of positioning holes 4211 on the contact portion 421. For example, three positioning holes 4211 can be provided, and the three positioning holes 4211 are spaced apart. By identifying the positions of the three positioning holes 4211, the specific position where the contact portion 421 is located can be determined. Of course, the number of the positioning holes 4211 can also be set to more than three.

[0106] In the embodiment of the present application, the positioning holes 4211 are provided as circular holes, which is relatively convenient for processing. It can be understood that the positioning holes 4211 can also be provided as triangular holes, square holes or other shapes, and no specific limitation is imposed on the specific shape of the positioning holes 4211 here.

[0107] In some embodiments, the separator assembly 40 further includes a fixing member 43 disposed on the separator 41 for fixing the separator 41 and the battery cell 20. In this way, the separator 41 and the battery cell 20 can be firmly mounted in the box 10 through the fixing member 43, preventing the separator 41 and the battery cell 20 from moving randomly in the box 10, so as to improve the working reliability of the battery device 100.

[0108] In some embodiments, the fixing member 43 and the separator 41 are configured as an integral structure. The fixing member 43 is disposed inside the separator 41, and both ends of the fixing member 43 extend outside the separator 41. The battery device 100 further includes a box 10, and the battery cell 20 and the separator assembly 40 are disposed in the box 10. Both ends of the fixing member 43 are connected to the box 10. In this way, the fixing member 43 can be firmly connected to the separator 41, which is beneficial to improving the firmness of the fixing of the separator 41 and the battery cell 20 by the fixing member 43. Moreover, the integral structure is beneficial to preventing the fixing member 43 from being lost, and is more convenient for storage and use.

[0109] Optionally, the fixing part and the separator 41 are configured as an injection-molded integral structure or a compression-molded integral structure. The fixing part and the separator 41 are formed into an integral structure by injection molding or compression molding relatively conveniently. During injection molding or compression molding, the fixing member 43 is also integrally formed with the separator 41 at the same time, so as to process the complete separator assembly 40 at one time.

[0110] Refer to Figure 8 , Figure 8 , which is a schematic structural diagram of the injection-molded separator assembly 40 according to some embodiments of the present application.

[0111] When injecting and processing the separator assembly 40, the electrical connection piece 42 and the fixing member 43 are placed as inserts into the injection mold; then the mold is closed, and molten material is injected into the mold cavity; wait for cooling and shaping; after cooling and shaping, the mold is opened and ejected, and thus the production of the separator assembly 40 with the electrical connection piece 42 and the fixing member 43 inserts is completed.

[0112] The material for injection molding can be materials such as PP, PA6, PC, ABS, PBT, etc., and additives such as fibers and talcum powder with different components can be added according to the requirements of structural strength to increase the strength.

[0113] Refer to Figure 9 , Figure 9 , which is a schematic structural diagram of the compression-molded separator assembly 40 according to some embodiments of the present application.

[0114] When molding the separator assembly 40, place the bottom fiber cloth 413 into the molding die; place the electrical connection piece 42 as an insert; then place the top fiber cloth 412; then close the die and inject resin into the mold cavity to allow the resin to infiltrate the bottom fiber cloth 413, the top fiber cloth 412, and the electrical connection piece 42; wait for cooling and shaping; after cooling and shaping, open the die and eject, thus completing the production of the separator assembly 40 with the electrical connection piece 42 insert.

[0115] Among them, through holes 411 need to be reserved in advance on the bottom fiber cloth 413 and the top fiber cloth 412. During the process of injecting resin, the position of the through holes 411 needs to be isolated to prevent the resin from covering the contact part 421 through the through holes 411, so as to ensure that the contact part 421 maintains conductivity.

[0116] When the fixing member 43 needs to be set, after placing the top fiber cloth 412, place the fixing member 43, and then cover the fixing member 43 with a fiber cloth, and the separator assembly 40 with the fixing member 43 can be processed.

[0117] In some embodiments, the contact part 421 and the electrode terminal 21 are connected through processes such as reflow soldering to ensure that the contact part 421 and the electrode terminal 21 are firmly connected and will not shift.

[0118] In some embodiments, the separator 41 and the battery cell 20 can be bonded through structural adhesive to ensure that the separator 41 is firmly installed at the end of the battery cell 20.

[0119] The battery device 100 provided by the embodiments of the present application includes a box body 10, and battery cells 20 and a separator assembly 40 arranged in the box body 10. Conductivity and isolation are achieved by arranging the separator assembly 40 at the end of the battery cell 20. The separator assembly 40 includes a separator 41, an electrical connection piece 42, and a fixing member 43. The separator 41 is bonded to the end of the battery cell 20 with the electrode terminal 21, and the contact part 421 of the electrical connection piece 42 is connected to the corresponding electrode terminal 21. By constructing the separator 41, the electrical connection piece 42, and the fixing member 43 into an integrally formed structure by injection molding or molding, the connection firmness of the electrical connection piece 42 and the fixing member 43 on the separator 41 is improved, effectively preventing the electrical connection piece 42 and the fixing member 43 from falling off the separator 41, thereby improving the reliability of the electrical connection function of the electrical connection piece 42 to the electrode terminal 21 and the reliability of the fixing member 43 to fix the separator 41 and the battery cell 20. Moreover, the integrally formed structure eliminates the assembly steps of the separator 41, the electrical connection piece 42, and the fixing member 43, which is beneficial to saving assembly time.

[0120] An embodiment of the present application further provides a separator assembly 40, which includes a separator 41 and an electrical connection piece 42. The separator 41 is provided with a plurality of through holes 411 penetrating the separator 41 in the thickness direction. The electrical connection piece 42 is disposed on the separator 41, and the electrical connection piece 42 is connected to the electrode terminal 21 of the corresponding battery cell 20 through the through hole. Wherein, the electrical connection piece 42 and the separator 41 are configured as an integral structure, and opposite ends of the electrical connection piece 42 are disposed within the separator 41.

[0121] In some embodiments, the separator assembly 40 further includes a fixing member 43. The fixing member 43 and the separator 41 are configured as an integral structure. The fixing member 43 is disposed within the separator 41, and both ends of the fixing member 43 extend outside the separator 41.

[0122] The specific structure of the separator assembly 40 provided in the embodiment of the present application is the same as that of the separator assembly 40 in the foregoing battery device 100, and will not be elaborated herein.

[0123] It should be noted that the separator assembly 40 provided in the embodiment of the present application is not only applicable to the battery device 100, but also applicable to other devices with electrical connection and isolation requirements. The application scenarios of the separator assembly 40 are not limited herein.

[0124] An embodiment of the present application further provides an electrical device, including the battery device 100 in any of the foregoing embodiments.

[0125] 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 make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A plurality of battery cells, each having an electrode terminal; Isolation plate assembly, comprising: An isolation plate, provided with a plurality of through holes penetrating the isolation plate in a thickness direction; An electrical connection sheet, disposed on the isolation plate, the electrical connection sheet being connected to the electrode terminal of the corresponding battery cell through the through hole; The electrical connection sheet and the isolation plate are constructed as an integrated structure, and two opposite ends of the electrical connection sheet are arranged in the isolation plate.

2. The battery device according to claim 1, characterized in that: The electrical connection sheet includes a contact portion exposed through the through hole for correspondingly connecting with the electrode terminal.

3. The battery device according to claim 2, characterized in that: The electrical connection sheet further includes a fixing portion connected to the contact portion; The fixing portion and the isolation plate are constructed as an integrated structure.

4. The battery device according to claim 3, characterized in that: The fixing portion is disposed in the isolation plate.

5. The battery device according to claim 4, characterized in that: The fixing portion and the isolation plate are constructed as an integral injection-molded structure or an integral molded structure.

6. The battery device according to claim 3, characterized in that: The contact portion is disposed to protrude relative to the fixing portion along a direction toward the battery cell.

7. The battery device according to claim 6, characterized in that: A surface of the contact portion facing the battery cell protrudes from a surface of the separator facing the battery cell.

8. The battery device according to claim 3, characterized in that: The contact portion is flush with a surface of the fixing portion facing the battery cell.

9. The battery device according to claim 3, characterized in that: The electrode terminal extends into the through hole to contact the contact portion; The isolation plate can abut against the battery cell.

10. The battery device according to any one of claims 3 to 9, characterized in that: The electrical connection sheet includes two contact portions arranged at intervals; The two contact portions are respectively connected to the electrode terminals of two adjacent battery cells.

11. The battery device according to claim 10, characterized in that: The fixing portion includes a first fixing portion and a second fixing portion; The first fixing portion connects the two contact portions, and the second fixing portion is connected to an end of the contact portion away from the first fixing portion.

12. The battery device according to any one of claims 2 to 9, characterized in that: A positioning portion is provided on a surface of the contact portion facing away from the battery cell; The positioning portion is used to determine position information of the contact portion.

13. The battery device according to claim 12, characterized in that: The positioning portion is configured as a plurality of positioning holes on the contact portion.

14. The battery device according to any one of claims 1 to 9, characterized in that: The isolation plate assembly further comprises: A fixing member is arranged on the isolation plate and is used to fix the isolation plate and the battery cell.

15. The battery device according to claim 14, characterized in that: The fixing member and the isolation plate are constructed as an integrated structure; The fixing member is arranged in the isolation plate, and both ends of the fixing member extend to the outside of the isolation plate. The battery device also includes a box body, the battery cell and the isolation plate assembly are arranged in the box body, and both ends of the fixing member are connected to the box body.

16. An isolation plate assembly, characterized in that: The isolation plate assembly comprises: An isolation plate, provided with a plurality of through holes penetrating the isolation plate in a thickness direction; An electrical connection sheet, disposed on the isolation plate, the electrical connection sheet being connected to the electrode terminal of the corresponding battery cell through the through hole; The electrical connection sheet and the isolation plate are constructed as an integrated structure, and two opposite ends of the electrical connection sheet are arranged in the isolation plate.

17. The insulation panel assembly according to claim 16, characterized in that The isolation plate assembly further comprises: The fixing member is constructed as an integrated structure with the isolation plate, the fixing member is arranged in the isolation plate, and both ends of the fixing member extend to the outside of the isolation plate.

18. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1-15.

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