Collector plate, battery cell and battery pack

Abstract

The utility model discloses a collector plate, battery cell and battery pack, the collector plate comprises: a plate body and a side wall, the side wall is connected to the peripheral side of the plate body, the side wall inclines and extends outward in the direction far away from the plate body. According to the collector plate disclosed by the utility model, the side wall which obliquely extends outwards is arranged in the circumferential direction of the plate body, so that the internal structure of the single battery is simplified, the circumferential side of the current collector can be completely clung to the inner circumferential wall of the shell, and a burst point generated by welding between the collector plate and the shell is avoided, so that a coating on the inner wall of the shell is prevented from being damaged; and the reject ratio of the battery monomers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a current collecting plate, a battery cell and a battery pack. Background Art

[0002] The related technology points out that the unique full-pole ear design of the large cylinder requires laser welding of the collector plate. At present, most of them are regular circular metal sheet designs. The current design has a circle around the entire negative electrode collector plate that is perpendicular to the contour of the entire negative electrode edge. However, when welding the negative electrode connecting piece and the shell, such a structure often cannot be completely tightly combined, resulting in welding explosion points, damaging the coating of the battery shell wall, and directly scrapping the battery, resulting in an increase in the defective rate of the entire line. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a current collecting plate, which can reduce the welding explosion points between the current collecting plate and the shell.

[0004] The utility model also provides a battery monomer having the current collecting plate.

[0005] The utility model also provides a battery pack having the battery monomer.

[0006] According to the first aspect of the present invention, the current collecting plate comprises: a plate body and a side wall, wherein the side wall is connected to the peripheral side of the plate body and extends outwardly in a direction away from the plate body.

[0007] According to the current collecting plate of the utility model, by arranging the side walls extending outward obliquely in the circumferential direction of the plate body, the internal structure of the battery cell is simplified, the circumferential side of the current collector can be completely in close contact with the inner circumferential wall of the shell, and the explosion point caused by the welding between the current collecting plate and the shell is avoided, thereby preventing the coating of the inner wall of the shell from being damaged, and reducing the defective rate of the battery cell.

[0008] In some embodiments, the angle between the side wall and the vertical direction is in the range of 0°-30°.

[0009] In some embodiments, the distance between an end of the side wall away from the disc body and the plane where the disc body is located is in the range of 2-3 mm.

[0010] In some embodiments, the thickness of the collecting plate is in the range of 0.15-0.25 mm.

[0011] In some embodiments, the current collecting plate is formed as a pure copper member or a copper-nickel-plated member.

[0012] In some embodiments, the collecting plate is integrally formed.

[0013] In some embodiments, an assembly hole is formed on the disk body, and the assembly hole penetrates the disk body in the thickness direction of the disk body.

[0014] A battery cell according to a second aspect of the present invention comprises the current collecting plate according to the first aspect of the present invention.

[0015] According to the battery cell of the utility model, by providing the current collecting plate according to the first aspect of the utility model, the internal structure of the battery cell is simplified, the peripheral side of the current collector can be completely in close contact with the inner peripheral wall of the shell, avoiding the occurrence of explosion points in the welding between the current collecting plate and the shell, thereby preventing the coating on the inner wall of the shell from being damaged, and reducing the defective rate of the battery cell.

[0016] In some embodiments, the battery cell further includes: a shell, and the side wall of the collecting plate is welded to the inner peripheral wall of the shell.

[0017] A battery pack according to a third aspect of the present invention comprises a battery cell according to the second aspect of the present invention.

[0018] According to the battery pack of the utility model, by providing the battery cells of the second aspect, the overall performance of the battery pack is improved, the safety of the battery pack is ensured, the risk factor of the battery pack is reduced, the overall structure of the battery pack is more reasonable, the production efficiency and production quality are improved, and the production and transportation costs are reduced.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a current collecting plate according to an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 Schematic cross-sectional view of the current collecting plate shown in FIG.

[0022] Reference numerals:

[0023] 100. Collecting plate; 1. Plate body; 2. Side wall; 3. Assembly hole. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] First, refer to Figure 1-Figure 2 A battery cell according to an embodiment of the second aspect of the utility model is briefly described. The battery cell includes the current collecting plate 100 according to the embodiment of the first aspect of the utility model.

[0026] According to the embodiment of the utility model, the battery cell comprises: a housing and the current collecting plate 100 according to the embodiment of the first aspect of the utility model.

[0027] Specifically, the side wall 2 of the current collecting plate 100 is connected to the inner peripheral wall of the shell by welding. Therefore, the structure of the battery cell is simple, and the connection between the current collecting plate 100 and the shell is tight.

[0028] According to the battery cell of the embodiment of the utility model, by setting the current collecting plate 100 according to the embodiment of the first aspect of the utility model, the internal structure of the battery cell is simplified, the peripheral side of the current collector can be completely in close contact with the inner wall of the shell, and the explosion point caused by the welding between the current collecting plate 100 and the shell is avoided, thereby preventing the coating on the inner wall of the shell from being damaged, and reducing the defective rate of the battery cell.

[0029] Reference below Figure 1 and Figure 2 The current collecting plate 100 according to the first embodiment of the present invention is described.

[0030] like Figure 1 As shown, the collector plate 100 according to the first embodiment of the utility model comprises: a plate body 1 and a side wall 2, wherein the side wall 2 is connected to the peripheral side of the plate body 1, and the side wall 2 extends outwardly in a direction away from the plate body 1. Therefore, the collector plate 100 has an ingenious structural design, low production cost and high production efficiency.

[0031] According to the current collecting plate 100 of the embodiment of the utility model, the internal structure of the battery cell is simplified by arranging the side wall 2 extending outward obliquely in the circumferential direction of the plate body 1. The circumferential side of the current collector can be completely in contact with the inner circumferential wall of the shell, thereby avoiding the occurrence of explosion points in the welding between the current collecting plate 100 and the shell, thereby preventing the coating on the inner wall of the shell from being damaged and reducing the defective rate of the battery cell.

[0032] In some embodiments of the present invention, the angle between the side wall 2 and the vertical direction is in the range of 0°-30°. For example, the angle between the side wall 2 and the vertical direction can be 0°, 2°, 4°, 6°, 8°, 10°, 12°, 14°, 16°, 18°, 20°, 22°, 24°, 26°, 28°, 30°, etc.

[0033] In some embodiments of the present invention, the distance between the end of the side wall 2 away from the tray body 1 and the plane where the tray body 1 is located is in the range of 2-3 mm. For example, the distance between the end of the side wall 2 away from the tray body 1 and the plane where the tray body 1 is located can be 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, etc.

[0034] In some embodiments of the present invention, the thickness of the collecting plate 100 is in the range of 0.15-0.25 mm. For example, the thickness of the collecting plate 100 can be 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, etc.

[0035] Since copper has good thermal conductivity and electrical conductivity, excellent corrosion resistance, good plasticity and strong toughness, preferably, the collecting plate 100 is formed as a pure copper part or a copper nickel-plated part.

[0036] In order to reduce the stress concentration problem of the current collecting disc 100 , improve the strength and safety of the current collecting disc 100 , and reduce the production cost, preferably, the current collecting disc 100 is integrally formed.

[0037] In some embodiments of the present invention, an assembly hole 3 is formed on the disc body 1, and the assembly hole 3 penetrates the disc body 1 in the thickness direction of the disc body 1. Thus, the production of the current collecting disc 100 is facilitated, the production difficulty is reduced, and the production rate and product quality are improved.

[0038] A battery pack according to an embodiment of the third aspect of the utility model includes a battery cell according to an embodiment of the second aspect of the utility model.

[0039] According to the battery pack of the embodiment of the utility model, by setting the battery cell of the above-mentioned second aspect embodiment, the overall performance of the battery pack is improved, the safe use of the battery pack is ensured, the risk factor of the battery pack is reduced, the overall structure of the battery pack is more reasonable, the production efficiency and production quality are improved, and the production and transportation costs are reduced.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0044] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A collecting plate, characterized in that: include: A disk body and a side wall, wherein the side wall is connected to the circumferential side of the disk body and is a continuous ring, the side wall extends outwardly in a direction away from the disk body, the distance between one end of the side wall away from the disk body and the plane where the disk body is located is in the range of 2-3mm, and the thickness of the collecting disk is in the range of 0.15-0.25mm.

2. The collecting plate according to claim 1, characterized in that: The angle between the side wall and the vertical direction is in the range of 0°-30°.

3. The collecting plate according to any one of claims 1 to 2, characterized in that: The current collecting plate is formed as a pure copper part or a copper-nickel-plated part.

4. The collecting plate according to any one of claims 1 to 2, characterized in that: The current collecting disc is integrally formed.

5. The collecting plate according to any one of claims 1 to 2, characterized in that: An assembly hole is formed on the disc body, and the assembly hole penetrates the disc body in the thickness direction of the disc body.

6. A battery cell, characterized in that: The present invention comprises the collecting plate according to any one of claims 1 to 5.

7. The battery cell according to claim 6, characterized in that: Also includes: The shell body has a side wall of the collecting plate and an inner peripheral wall of the shell body connected by welding.

8. A battery pack, characterized in that: A battery cell comprising the battery cell according to any one of claims 6 to 7.

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