CN216980823U

CN216980823U - Cell shell structure

Info

Publication number: CN216980823U
Application number: CN202121687507.0U
Authority: CN
Inventors: 郑盼斌; 张亚儒; 张亮
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-07-15
Anticipated expiration: 2031-07-23

Abstract

The utility model relates to a battery cell shell structure, which comprises a cover plate (1), a frame (8) and at least one group of pole components, wherein the cover plate is arranged on the frame; during assembly, the cover plates (1) are respectively positioned on the upper side and the lower side of the frame (8), and the pole components are arranged on the edge of the frame (8); the pole component comprises a pole and a switching piece, the pole is provided with at least two cylindrical bulges, the frame (8) and the switching piece are provided with holes matched with the bulges, and the bulges are inserted and connected in the holes during assembly. Compared with the prior art, the utility model has the advantages of reducing explosion points, enhancing the sealing property, reducing the assembly difficulty and the like.

Description

Cell shell structure

Technical Field

The utility model relates to the field of battery structures, in particular to a battery cell shell structure.

Background

The battery shell structure is an essential basic part in the battery manufacturing process. The battery shell mainly comprises a frame, a cover plate, an explosion-proof valve, a positive (negative) pole, a sealing ring, upper plastic, lower plastic and a switching piece.

The existing pole structure is of a U-shaped step structure and has the following defects: firstly, current utmost point post is U type stepped structure, and is great with switching piece cooperation area, and utmost point post and switching piece complex size uniformity are difficult to guarantee, appear the great phenomenon in cooperation gap easily. In the laser welding process, laser easily passes through the gap and contacts the sealing ring below the adapter plate, and the phenomena of explosion point and blackening occur. Secondly, manual point selection is more when current utmost point post and switching piece welding, and machining efficiency is low and the orbit uniformity is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a stainless steel battery cell shell structure which reduces explosion points, enhances sealing performance and reduces assembly difficulty.

The purpose of the utility model can be realized by the following technical scheme:

a stainless steel battery cell shell structure comprises a cover plate, a frame and at least one group of pole components; during assembly, the cover plates are respectively positioned on the upper side and the lower side of the frame, and the pole component is arranged on the edge of the frame;

the pole component comprises a pole and a switching piece, the pole is provided with at least two cylindrical protrusions, the frame and the switching piece are provided with holes matched with the protrusions, and the protrusions are inserted and connected in the holes during assembly.

Further, utmost point post subassembly still including being located the frame outside:

the upper plastic is used for insulation;

be located the frame inboard:

a seal for sealing the pole assembly;

the lower plastic is used for insulation;

the upper plastic is positioned between the pole and the frame; the sealing element is positioned between the lower plastic and the frame, and the adapter plate is positioned on the inner side of the lower plastic.

Further, the sealing member include the gasket and set up the sealed hole in gasket middle part, during the equipment, the gasket be located down between plastic and the frame.

Preferably, the sealing element can be firstly assembled with the pole and the upper plastic to form an integrated part, so that the subsequent assembly difficulty is reduced.

Furthermore, the middle part of the adapter plate is provided with an adapter hole matched with the bulge in shape.

Preferably, protruding top concave-convex structure, the main function can accomplish the preliminary sealing with the adaptor piece cooperation.

Preferably, the transfer hole is in a bell mouth shape, and is mainly used for being matched with the pole to form a riveting structure so as to finish pre-sealing.

Furthermore, the frame is provided with a connecting hole, the middle part of the lower plastic is provided with a through hole, and the middle part of the upper plastic is provided with a matching hole corresponding to the through hole.

Furthermore, the matching hole, the connecting hole, the sealing hole and the through hole are matched with the bulge in shape. The pole, the frame, the lower plastic and the sealing element form good sealing, and the freedom degree of the upper plastic and the lower plastic is greatly limited.

Furthermore, the lower plastic comprises a large C component in the middle, and a left C component and a right C component which are positioned on two sides of the large C component and are buckled with the large C component; the opening of the large C component is positioned on the inner side.

Further, the size of the adapter plate is matched with the opening of the large C component.

Furthermore, the cross section of the adapter plate is of an L-shaped structure and is tightly attached to the large C component. Chamfers are removed from the switching hole and the L-shaped corner part of the switching piece, and the switching hole and the L-shaped corner part can be tightly matched with the convex part of the pole and the lower plastic, so that the blackening phenomenon is avoided.

Furthermore, the frame on still be equipped with balanced bleeder vent, right C subassembly position correspond with balanced bleeder vent.

Compared with the prior art, the utility model has the following advantages:

(1) the fit contact area of the pole and the adapter plate is reduced, and the fit accuracy and consistency are enhanced;

(2) the utility model reduces the manual point selection step during laser welding, reduces the error probability and improves the production efficiency;

(3) the cylindrical pole is adopted, so that the assembly difficulty of the pole assembly is reduced;

(4) the size of the sealing ring is increased, and the assembly difficulty is reduced;

(5) the volume of the adapter plate is increased, and the adapter plate is matched with the lower plastic, so that the assembly difficulty of the pole post assembly is reduced, the rotational freedom degree of the lower plastic is limited, and the matching stability is enhanced;

(6) The adapter plate in the utility model removes the chamfer angle, and is tightly matched with the pole, thereby avoiding the blackening phenomenon.

Drawings

Fig. 1 is a schematic diagram of a structure of a cell casing in an embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1;

the reference numbers in the figures indicate: the structure comprises a cover plate 1, a positive pole 2, a protrusion 21, a positive pole adapter plate 3, an adapter hole 31, upper plastic 4, a matching hole 41, lower plastic 5, a large C component 500, a left C component 501, a right C component 502, a through hole 51, a negative pole 6, a negative pole adapter plate 7, a frame 8, a connecting hole 81, a sealing element 9, a sealing plate 91, a sealing hole 92 and balance vent holes 10.

Detailed Description

The utility model is described in detail below with reference to the figures and the specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

Examples

A stainless steel battery cell shell structure is shown in figures 1-2 and comprises a cover plate 1, a frame 8 and two groups of pole assemblies, namely a positive pole assembly and a negative pole assembly; during assembly, the cover plates 1 are respectively positioned at the upper side and the lower side of the frame 8, and the pole assemblies are arranged at the edge of the frame 8;

Anodal utmost point post subassembly includes anodal post 2 and anodal switching piece 3, includes two columniform archs 21 on the anodal post 2, offers the trompil that matches with protruding 21 on frame 8 and the anodal switching piece 3, and during the assembly, protruding 21 alternates to be connected in the trompil. Anodal utmost point post subassembly is still including being located the 8 outsides of frame: the upper plastic 4 is used for insulation; located inside the frame 8: a seal 9 for sealing the pole assembly; the lower plastic 5 is used for insulation; the upper plastic 4 is positioned between the positive pole column 2 and the frame 8; the sealing element 9 is positioned between the lower plastic 5 and the frame 8, and the positive pole adapter plate 3 is positioned on the inner side of the lower plastic 5.

The sealing element 9 comprises a sealing sheet 91 and a sealing hole 92 formed in the middle of the sealing sheet 91, and the sealing sheet 91 is located between the lower plastic 5 and the frame 8 during assembly. The middle part of the positive electrode adapter plate 3 is provided with an adapter hole 31 matched with the bulge 21 in shape. The frame 8 is provided with a connecting hole 81, the middle part of the lower plastic 5 is provided with a through hole 51, and the middle part of the upper plastic 4 is provided with a matching hole 41 corresponding to the through hole 51. The matching hole 41, the connecting hole 81, the sealing hole 92, and the through hole 51 match the shape of the protrusion 21. The pole, the frame, the lower plastic and the sealing element form good sealing, and the freedom degree of the upper plastic and the lower plastic is greatly limited.

The lower plastic 5 comprises a large C component 500 in the middle, and a left C component 501 and a right C component 502 which are positioned on two sides of the large C component 500 and are buckled with the large C component 500; the opening of the large C-assembly 500 is located inside. The size of the positive electrode interposer 3 matches the large C-module 500 opening. The cross section of the positive electrode adapter sheet 3 is of an L-shaped structure and is tightly attached to the large C component 500. Chamfers are removed from the switching hole and the L-shaped corner part of the switching piece, and the switching hole and the L-shaped corner part can be tightly matched with the convex part of the pole and the lower plastic, so that the blackening phenomenon is avoided. The frame 8 is also provided with a balance vent hole 10, and the position of the right C component 502 corresponds to the balance vent hole 10.

In addition, the negative pole post assembly comprises a negative pole post 6 and a negative pole adapter sheet 7, the negative pole post 6 also comprises two cylindrical bulges, and other connection modes are consistent with those of the positive pole post assembly.

In the preferred scheme, protruding top concave-convex dress structure, the main function can accomplish with the adaptor piece cooperation and seal in advance. The transfer hole is in a horn mouth shape and is mainly used for being matched with the pole to form a riveting structure so as to finish pre-sealing.

In the preferred scheme, sealing member 9 can assemble earlier with utmost point post and last plastic 4 and form integrative piece, reduces the follow-up assembly degree of difficulty.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. The battery cell shell structure is characterized by comprising a cover plate (1), a frame (8) and at least one group of pole assemblies; during assembly, the cover plates (1) are respectively positioned on the upper side and the lower side of the frame (8), and the pole components are arranged on the edge of the frame (8);

the pole component comprises a pole and a switching piece, the pole is provided with at least two cylindrical bulges, the frame (8) and the switching piece are provided with holes matched with the bulges, and the bulges are inserted and connected in the holes during assembly.

2. The cell casing structure according to claim 1, wherein the pole assembly further comprises, outside the frame (8):

the upper plastic (4) is used for insulation;

located inside the frame (8):

a seal (9) for sealing the pole assembly;

the lower plastic (5) is used for insulation;

the upper plastic (4) is positioned between the pole and the frame (8); the sealing element (9) is positioned between the lower plastic (5) and the frame (8), and the adapter plate is positioned on the inner side of the lower plastic.

3. The cell casing structure according to claim 2, wherein the sealing member (9) comprises a sealing plate (91) and a sealing hole (92) formed in the middle of the sealing plate (91), and the sealing plate (91) is located between the lower plastic (5) and the frame (8) during assembly.

4. The cell casing structure according to claim 1, wherein a switching hole matching with the convex shape is formed in the middle of the switching piece.

5. The cell shell structure according to claim 2 or 3, wherein the frame (8) is provided with a connecting hole (81), the middle part of the lower plastic (5) is provided with a through hole (51), and the middle part of the upper plastic (4) is provided with a matching hole (41) corresponding to the through hole (51).

6. The cell casing structure according to claim 5, wherein the matching hole (41), the connecting hole (81), the sealing hole (92) and the through hole (51) are matched with the convex shape.

7. The cell casing structure according to claim 2, wherein the lower plastic (5) comprises a large C component (500) at the middle part, and a left C component (501) and a right C component (502) which are located at two sides of the large C component (500) and fastened with the large C component (500); the opening of the large C component (500) is located on the inner side.

8. The cell casing structure according to claim 7, wherein the adaptor plate is sized to fit the opening of the large C-module (500).

9. The cell casing structure according to claim 7, wherein the cross section of the adaptor plate is an L-shaped structure, and is tightly attached to the large C component (500).

10. The cell shell structure of claim 7, wherein the frame (8) is further provided with a balance vent (10), and the right C component (502) corresponds to the balance vent (10).