Integrated lithium ion battery series cover plate

Abstract

The utility model discloses an integrated lithium ion battery series cover plate, which belongs to the technical field of batteries, and comprises a substrate component which is a rectangular plate body extending along a first direction and a second direction; the first total connecting sheet is connected to the positive electrode of the first battery cell; the second total connecting sheet is connected to the negative electrode of the second battery cell; the first general connecting piece is used for connecting two adjacent battery cells in the battery cell group, the second general connecting piece is used for connecting two adjacent battery cells in the battery cell group, and the first general connecting piece, the second general connecting piece and the at least one middle connecting piece are integrated on the substrate component and are arranged at intervals in the first direction and / or the second direction. By designing the integrated substrate component, the first total connecting piece, the second total connecting piece and the middle connecting piece and improving the arrangement mode of the first total connecting piece, the second total connecting piece and the middle connecting piece, the size of the connecting pieces can be reduced, and the overall weight of the cover plate is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to an integrated lithium-ion battery series connection cover plate. Background Art

[0002] With the rapid development of electric vehicles, the requirement for the cruising range is increasing day by day. Therefore, the requirement for the battery energy density is more stringent, and a cover plate with a lighter mass is needed to replace the traditional cover plate. Content of the Utility Model

[0003] The purpose of the utility model is to provide an integrated lithium-ion battery series connection cover plate to solve the problem of the relatively heavy mass of the traditional cover plate proposed in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an integrated lithium-ion battery series connection cover plate for realizing the series connection of the battery cells in a battery cell group. The battery cell group at least includes a first battery cell and a second battery cell. The series connection cover plate includes:

[0005] A substrate member configured as a rectangular plate body extending in a first direction and a second direction;

[0006] A first main connection piece connected to the positive electrode of the first battery cell;

[0007] A second main connection piece connected to the negative electrode of the second battery cell;

[0008] At least one intermediate connection piece configured as a connecting component between two adjacent battery cells in the battery cell group. The first main connection piece, the second main connection piece and at least one intermediate connection piece are integrated on the substrate member and arranged at intervals in the first direction and / or the second direction.

[0009] By designing an integrated substrate member, first main connection piece, second main connection piece and intermediate connection piece, and improving the arrangement mode of the first main connection piece, second main connection piece and intermediate connection piece, the size of the connection piece can be reduced, and the overall weight of the cover plate is reduced.

[0010] Preferably, the first main connection piece and the second main connection piece are respectively arranged at both ends of the substrate member in the first direction.

[0011] Preferably, both the first main connection piece and the second main connection piece have:

[0012] A frame portion on which a notch structure is formed;

[0013] A connection portion formed in the notch structure and integrally formed with the frame portion.

[0014] Preferably, the thickness of the connection portion decreases as the width of the connection portion in the second direction increases.

[0015] Preferably, the projection of the connecting portion in the second direction is a trapezoid.

[0016] Preferably, the first total connecting piece, the second total connecting piece and at least one intermediate connecting piece are connected to the substrate member by thermal riveting, adhesives, ultrasonic welding or laser welding.

[0017] Preferably, the substrate member is provided with thermal rivets at corresponding positions of the first total connecting piece, the second total connecting piece and at least one intermediate connecting piece, and the first total connecting piece, the second total connecting piece and at least one intermediate connecting piece are provided with holes for the thermal rivets to pass through.

[0018] Fixing the first total connecting piece, the second total connecting piece and at least one intermediate connecting piece to the substrate structure by thermal riveting can reduce the size of the series connecting pieces and play a role in weight reduction and cost reduction.

[0019] Preferably, the intermediate connecting piece is a rectangular sheet body.

[0020] Preferably, there are five intermediate connecting pieces.

[0021] Preferably, the first total connecting piece, the second total connecting piece and at least one intermediate connecting piece are all made of copper-nickel plated material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded view of the series cover plate;

[0023] Figure 2 is a schematic assembly diagram of the series cover plate;

[0024] Figure 3 is a schematic sectional view of the series cover plate.

[0025] In the figure:

[0026] 100, substrate member; 101, first total connecting piece; 102, second total connecting piece; 103a, frame portion; 103b, connecting portion; 104, intermediate connecting piece; 105, thermal rivet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] An integrated lithium-ion battery series cover plate (hereinafter referred to as the series cover plate) is used in cooperation with a battery cell group (not shown) to achieve series connection of battery cells in the battery cell group. The battery cell group includes at least a first battery cell and a second battery cell. Refer to Figure 1 and 2 , the main body of the series cover plate is composed of a substrate member 100, a first main connection piece 101, a second main connection piece 102, and at least one intermediate connection piece 104. The substrate member 100 is made of a high-strength and high-temperature-resistant material and serves as an installation carrier for the first main connection piece 101, the second main connection piece 102, and at least one intermediate connection piece 104. That is, the first main connection piece 101, the second main connection piece 102, and at least one connection piece are all assembled on the substrate member 100. Correspondingly, the above-mentioned first main connection piece 101, second main connection piece 102, and at least one intermediate connection piece 104 are made of nickel-plated copper material. The first main connection piece 101 is configured as the main positive connection piece, that is, it is configured as the output end of the battery positive current and is connected to the positive electrode of the first battery cell. The second main connection piece 102 is configured as the main negative connection piece, that is, it is configured as the input end of the battery negative current and is connected to the negative electrode of the second battery cell. Correspondingly, the intermediate connection piece 104 is configured as the connection between two adjacent battery cells in the battery cell group. Taking the example that the battery cell group only includes the first battery cell and the second battery cell, at this time, the first battery cell and the second battery cell are connected by an intermediate connection piece 104, and one end of the intermediate connection piece 104 is connected to the negative electrode of the first battery cell, and the other end is connected to the negative electrode of the second battery cell.

[0029] Refer to Figure 1 and 2 , in some embodiments, the substrate member 100 is configured as a rectangular plate body formed by extending in a first direction and a second direction, and the first direction and the second direction are perpendicular to each other. Correspondingly, the above-mentioned first main connection piece 101, second main connection piece 102, and at least one intermediate connection piece 104 are arranged on the substrate member 100 at intervals in the first direction and / or the second direction. Exemplarily, taking five intermediate connection pieces (a - e) as an example for illustration, at this time, the first main connection piece 101 and the second main connection piece 102 are arranged at intervals in the first direction. The intermediate connection pieces c and d are arranged between the first main connection piece and the second main connection piece and are arranged at intervals from each other. The intermediate connection pieces a, b, and e are arranged at intervals from the first main connection piece in the second direction, and the intermediate connection pieces a, b, and e are arranged at intervals from each other in the first direction. At this time, the first main connection piece, the intermediate connection pieces a - e, and the second main connection piece are sequentially connected through battery cells.

[0030] In some embodiments, the above-mentioned first total connecting piece 101 and second total connecting piece 102 both have a frame portion 103a and a connecting portion 103b. The frame portion 103a has a notch structure, and the connecting portion 103b is formed at the notch position of the frame portion 103a and is integrally formed with the frame portion 103a. In some embodiments, the thickness of the connecting portion 103b changes with the change of the width of the connecting portion 103b in the second direction. Specifically, the thickness of the connecting portion 103b decreases as the width of the connecting portion 103b in the second direction increases. Exemplarily, referring to Figure 1 , the projection of the connecting portion 103b in the second direction is a trapezoid, that is, the width of the notch of the frame portion 103a gradually increases in the second direction.

[0031] In some embodiments, the above-mentioned first total connecting piece 101, second total connecting piece 102 and at least one intermediate connecting piece 104 are assembled on the substrate member 100 by one of hot riveting, adhesives, ultrasonic welding or laser welding. Exemplarily, taking the assembly method of hot riveting as an example for description, referring to Figure 3 , the substrate member 100 is provided with hot rivets 105 at the corresponding positions of the first total connecting piece 101, second total connecting piece 102 and at least one intermediate connecting piece 104. Correspondingly, the first total connecting piece 101, second total connecting piece 102 and at least one intermediate connecting piece 104 are provided with holes for the hot rivets 105 to pass through, such as round holes or rectangular holes, to realize the connection between the first total connecting piece 101, second total connecting piece 102 and at least one intermediate connecting piece 104 and the substrate member 100.

[0032] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the description of the present utility model, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present utility model, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present utility model and the features of different embodiments or examples.

[0034] Although the present utility model 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 for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An integrated lithium-ion battery series cover plate, characterized in that: Used to realize the series connection of the cells in the cell group, the cell group includes at least a first cell and a second cell, and the series connection cover plate includes: A substrate member, which is configured as a rectangular plate extending along a first direction and a second direction; A first main connecting plate connected to the positive electrode of the first battery cell; A second main connecting plate connected to the negative electrode of the second battery cell; At least one intermediate connecting plate is configured as a connecting component for two adjacent battery cells in the battery cell group. The first total connecting plate, the second total connecting plate and at least one intermediate connecting plate are integrated on the substrate component and are arranged at intervals from each other in the first direction and / or the second direction.

2. The integrated lithium-ion battery series cover plate according to claim 1, characterized in that: The first general connection piece and the second general connection piece are respectively arranged at two ends of the substrate member in the first direction.

3. The integrated lithium-ion battery series cover plate according to claim 1, characterized in that: The first main connecting piece and the second main connecting piece both have: a frame portion having a notch structure formed thereon; The connecting portion is formed in the notch structure and is formed integrally with the frame portion.

4. The integrated lithium-ion battery series cover plate according to claim 3, characterized in that: The thickness of the connecting portion decreases as the width of the connecting portion in the second direction increases.

5. The integrated lithium-ion battery series cover plate according to claim 4, characterized in that: The projection of the connecting portion in the second direction is a trapezoid.

6. The integrated lithium-ion battery series cover plate according to claim 1, characterized in that: The first general connecting piece, the second general connecting piece and at least one intermediate connecting piece are connected to the base plate component by heat riveting, gluing, ultrasonic welding or laser welding.

7. The integrated lithium-ion battery series cover plate according to claim 1, characterized in that: The substrate member is provided with heat rivets at corresponding positions of the first general connecting piece, the second general connecting piece and at least one intermediate connecting piece, and the first general connecting piece, the second general connecting piece and at least one intermediate connecting piece are provided with holes for the heat rivets to pass through.

8. The integrated lithium-ion battery series cover plate according to claim 1, characterized in that: The middle connecting piece is a rectangular piece.

9. The integrated lithium-ion battery series cover plate according to claim 1, characterized in that: There are five intermediate connecting pieces.

10. The integrated lithium-ion battery series cover plate according to claim 1, characterized in that: The first main connecting plate, the second main connecting plate and at least one intermediate connecting plate are all made of copper-plated nickel material.

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