A square cylindrical battery cover plate structural member

Abstract

The utility model discloses a square cylindrical battery cover plate structural member, it includes cover plate and circular fixed ring subassembly, circular fixed ring subassembly includes top, weld ring, fixed ring and sealing washer, weld ring has the concave cavity, the concave cavity bottom transversely extends out the flange, and the fixed ring is supported and is connected in the flange, and the top is connected in the weld ring to with the fixed ring fixed in the weld ring, cover plate has the perforation, is connected with the perforation through the weld ring to with circular fixed ring subassembly assembly in cover plate. It has simple structure, compact cooperation, and the advantages such as reasonable in design, therefore, it is a kind of product with superior performance in technicality and economy.

Description

[Technical Field]

[0001] This utility model relates to a square cylindrical battery cover structure. [Background Technology]

[0002] With the rapid development of the lithium battery industry, high rate capability, high energy density, long cycle life, high voltage, and high safety performance of lithium cobalt oxide batteries have become key research areas in lithium cobalt oxide materials. Traditional lithium cobalt oxide batteries mostly adopt square or cylindrical structures, with corresponding battery covers also using square or cylindrical covers. However, the manufacturing process of square covers is complex, involving multiple stamping, cleaning, welding (such as laser welding of the terminals and cover), injection molding (insulating parts), assembly (sealing rings, flip-over plates, explosion-proof valve plates, etc.), and testing processes. Mold development costs are high, material utilization is relatively low (rectangular punching), and unit costs are typically high. In contrast, the manufacturing process of cylindrical covers is highly standardized and simple, mainly involving stamping (with explosion-proof valve markings) and possible edge curling; material utilization is high, it is easy to mass-produce at high speed with automated processes, and unit costs are very low. To facilitate production and improve versatility, we combine square and cylindrical covers to propose a new cover structure. [Utility Model Content]

[0003] To solve at least one of the above problems, this utility model proposes a new structural solution. The square cylindrical battery cover structure adopts the following technical solution:

[0004] A square cylindrical battery cover structure, comprising a cover plate and a circular retaining ring assembly;

[0005] The circular retaining ring assembly includes a top cover, a welding ring, a retaining ring, and a sealing ring; the welding ring has a concave cavity, and a support edge extends laterally from the bottom of the concave cavity. The retaining ring is supported by the support edge, and the top cover is connected to the welding ring to fix the retaining ring to the welding ring.

[0006] The cover plate has perforations, and a circular retaining ring assembly is assembled onto the cover plate by connecting a welded ring to the perforations.

[0007] Preferably, the cover plate is polygonal or circular.

[0008] Preferably, a sealing ring is placed on the support edge, and the sealing ring is located between the support edge and the fixing ring.

[0009] Preferably, the fixing ring includes a first fixing ring and a second fixing ring, the first fixing ring having a first through hole and the second fixing ring having a second through hole, the second fixing ring passing through the first through hole to be assembled with the first fixing ring.

[0010] Preferably, both the first fixing ring and the second fixing ring are provided with stepped positions.

[0011] Preferably, the top cover has a third through hole, and the top end of the first fixing ring passes through the third through hole and protrudes outside the third through hole.

[0012] Preferably, the top of the top cover extends laterally to form a stop, and the stop extends downward to form a retaining ring; when the top cover is connected to the fixing ring, the retaining ring is engaged between the first fixing ring and the second fixing ring.

[0013] Preferably, the top cover has a cavity, and the fixing ring and welding ring extending from the cover plate are connected into the cavity.

[0014] Preferably, both the welding ring and the top cover have an arc surface at their connection points.

[0015] The beneficial effects of this utility model compared with the prior art are:

[0016] This design combines the features of square and cylindrical cover plates, employing a polygonal cover plate and a circular retaining ring assembly. The polygonal cover plate facilitates processing, and the combination with the highly standardized and simple circular retaining ring assembly simplifies the production process and reduces manufacturing costs. It boasts advantages such as simple structure, compact fit, and rational design; therefore, it is a product with superior technical and economic performance. [Attached Image Description]

[0017] Figure 1 This is a schematic diagram of the square cylindrical battery cover structure in a preferred embodiment of the present invention;

[0018] Figure 2 This is an exploded view of the square cylindrical battery cover structure in the preferred embodiment of this utility model.

[0019] Figure 3 This is a cross-sectional schematic diagram of the square cylindrical battery cover structure in the preferred embodiment of this utility model;

[0020] Figure 4 This is an exploded cross-sectional view of the square cylindrical battery cover structure in the preferred embodiment of this utility model.

Detailed Implementation Methods

[0021] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] The preferred embodiment provided by this utility model is as follows: Figures 1-4 As shown, a square cylindrical battery cover structure includes a cover plate 1 and a circular fixing ring assembly 2; the cover plate 1 is polygonal and circular, and the polygon can be quadrilateral, pentagonal, hexagonal, and so on, to adapt to various battery models.

[0025] The circular fixing ring assembly 2 includes a top cover 3, a welding ring 4, a fixing ring 5, and a sealing ring 6; the welding ring 4 has an inner concave cavity 41, and an annular support edge 42 extends laterally from the bottom of the inner concave cavity 41. The fixing ring 5 is supported by the support edge 42, and the top cover 3 is connected to the welding ring 4 to fix the fixing ring 5 to the welding ring 4.

[0026] The cover plate 1 has a through hole 11, and a welding ring 4 is connected to the through hole 11 to assemble the circular retaining ring assembly 2 onto the cover plate 1. A sealing ring 6 is placed on the support edge 42, and the sealing ring 6 is located between the support edge 42 and the retaining ring 5 to prevent air leakage.

[0027] The retaining ring 5 includes a first retaining ring 51 and a second retaining ring 52. The first retaining ring 51 has a first through hole 53, and the second retaining ring 52 has a second through hole 54. The second retaining ring 52 passes through the first through hole 53 to be assembled with the first retaining ring 51. Both the first retaining ring 51 and the second retaining ring 52 are provided with stepped positions 55. When the first retaining ring 51 and the second retaining ring 52 are assembled together, the stepped positions 55 of the first retaining ring 51 and the second retaining ring 52 engage to ensure a tight connection between the two.

[0028] The top cover 3 has a third through hole 31, through which the top end of the first fixing ring 52 passes and protrudes. A stop 32 extends laterally from the top of the top cover 3, and a retaining ring 33 extends downward from the stop 32. When the top cover 3 is connected to the fixing ring 5, the retaining ring 33 is engaged between the first fixing ring 51 and the second fixing ring 52. The top cover 3 has a cavity 34, into which the fixing ring 5 and the welding ring 4 extending from the cover plate 1 are inserted. Both the welding ring 4 and the top cover 3 have an arc surface 35 at their connection points to ensure a tight connection. Each through hole is used to connect to an electrode post; since the electrode post is a conventional structural component, its structure will not be described in detail here.

[0029] In this solution, the features of square cover plate 1 and cylindrical cover plate 1 are combined, and polygonal cover plate 1 and circular fixing ring assembly 2 are adopted. Polygonal cover plate 1 is easy to process, and combined with the highly standardized and simple circular fixing ring assembly 2, the two simplify the production process and reduce the processing and production cost.

[0030] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A square cylindrical battery cover structure, characterized in that: It includes a cover plate and a circular retaining ring assembly; The circular retaining ring assembly includes a top cover, a welding ring, a retaining ring, and a sealing ring; the welding ring has a concave cavity, and a support edge extends laterally from the bottom of the concave cavity. The retaining ring is supported by the support edge, and the top cover is connected to the welding ring to fix the retaining ring to the welding ring. The cover plate has perforations, and a circular retaining ring assembly is assembled onto the cover plate by connecting a welded ring to the perforations.

2. The square cylindrical battery cover structure according to claim 1, characterized in that: The cover plate is polygonal and circular.

3. The square cylindrical battery cover structure according to claim 1, characterized in that: A sealing ring is placed on the support edge, and the sealing ring is located between the support edge and the retaining ring.

4. A square cylindrical battery cover structure according to claim 1, characterized in that: The fixing ring includes a first fixing ring and a second fixing ring. The first fixing ring has a first through hole, and the second fixing ring has a second through hole. The second fixing ring passes through the first through hole to be assembled with the first fixing ring.

5. A square cylindrical battery cover structure according to claim 4, characterized in that: Both the first and second fixing rings are provided with stepped positions.

6. A square cylindrical battery cover structure according to claim 5, characterized in that: The top cover has a third through hole, and the top end of the first fixing ring passes through the third through hole and protrudes outside the third through hole.

7. A square cylindrical battery cover structure according to claim 6, characterized in that: The top of the top cover extends laterally to form a stop, and the stop extends downward to form a retaining ring; when the top cover is connected to the fixing ring, the retaining ring is engaged between the first fixing ring and the second fixing ring.

8. A square cylindrical battery cover structure according to claim 1, characterized in that: The top cover has a cavity, and the fixing ring and welding ring extending from the cover plate are connected into the cavity.

9. A square cylindrical battery cover structure according to claim 1, characterized in that: Both the welding ring and the top cover have curved surfaces at their connection points.

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