CN217468595U

CN217468595U - Compact square steel shell battery

Info

Publication number: CN217468595U
Application number: CN202220903173.4U
Authority: CN
Inventors: 戈志敏; 肖海燕; 顾勇平; 刘晓伟; 吴勇民
Original assignee: Xinyu Ganfeng Electronics Co Ltd
Current assignee: Xinyu Ganfeng Electronics Co Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-09-20
Anticipated expiration: 2032-04-19

Abstract

The utility model provides a square steel-shelled battery of compact. The square steel-shelled battery of compact includes the lower cover, accept in roll core in the lower cover, and locate upper cover on the lower cover, the inner chamber of lower cover is for being used for acceping roll core accept the chamber, center on the chamber roof of lower cover the periphery of lower cover is seted up flutedly, the groove perisporium of recess with be formed with the step between the tank bottom wall of recess, the upper cover is located on the step. The utility model provides a square steel-shelled battery of compact, because the lower cover has the step, in the embedded lower cover of upper cover, can reduce extravagant size.

Description

Compact square steel shell battery

Technical Field

The utility model relates to a lithium cell technical field especially relates to a square steel-shelled battery of compact.

Background

The existing square steel shell battery comprises a lower cover, a winding core accommodated in the lower cover and an upper cover arranged on the lower cover. The length and width of the whole square steel shell battery depend on the upper cover, the thickness of the battery is the size of the lower cover, the radius of a fillet of the upper cover and the wall thickness of the upper cover, and the external dimension of the battery is larger; gaps at the welding positions of the upper cover and the lower cover cannot reach zero matching, the material is too thin, and due to slight gaps, cold welding is easy to occur, and the risk of liquid leakage exists; in addition, the upper cover and the lower cover are buckled down to have a break difference, so that the whole body is not attractive.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a square steel-shelled battery of compact.

The utility model discloses a square steel-shelled cell of compact, include the lower cover, accept in roll up the core in the lower cover, and locate the upper cover on the lower cover, the inner chamber of lower cover is for being used for acceping roll up the chamber of acceping of core, center on the chamber roof of lower cover the periphery of lower cover is seted up flutedly, the groove perisporium of recess with be formed with the step between the tank bottom wall of recess, the upper cover is located on the step.

Further, it includes a roll core body and locates to roll up two utmost point ears on the core body, each utmost point ear includes first portion, kink and second portion, the first portion with roll up this body coupling of core, the relative both ends of kink respectively with the first portion with the second portion is connected, the second portion with the first portion is parallel, the second portion with space between the first portion is the centre gripping chamber, be equipped with the insulating part in the centre gripping chamber of two utmost point ears.

Further, two one of them in the utmost point ear is anodal utmost point ear, two another one in the utmost point ear is the negative pole utmost point ear, anodal utmost point ear with the anodal electrode connecting piece of lower cover is connected, the negative pole utmost point ear with the negative electrode connecting piece of lower cover is connected.

Furthermore, a liquid injection groove is formed in the lower cover, a plurality of liquid injection holes are formed in the groove wall of the liquid injection groove, and each liquid injection hole is communicated with the outside and the containing cavity.

Furthermore, install in the notes cistern and annotate liquid hole apron, annotate liquid hole apron and be used for sealing annotate the liquid hole.

Furthermore, two utmost point ears respectively with the anodal electrode connecting piece of lower cover, the negative pole electrode connecting piece welding of lower cover, the upper cover through welded mode with lower cover fixed connection, annotate liquid apron through welded mode with lower cover fixed connection.

The utility model discloses a square steel-shelled battery of compact, the periphery around the lower cover is seted up flutedly on the chamber roof of lower cover, is formed with the step between the groove perisporium of recess and the tank bottom wall of recess, and the upper cover is located on the step. Because the lower cover has the step, in the embedded lower cover of upper cover, can reduce the waste size, in addition, annotate the setting quantity in liquid hole and be a plurality of, avoid annotating the liquid and annotate the unsatisfied situation.

The compact square steel shell battery of the utility model has smaller overall dimension, namely the length, width and thickness of the lower cover; the volume of the inner cavity is the same as that of the shell with the existing structure, the thickness of the lower cover can be increased to 0.2mm from the original thickness of 0.15mm, the integral strength can be enhanced, the lower cover cannot be deformed easily due to thinness, and the assembly precision is ensured; zero matching can be realized between the lower cover and the upper cover, no gap exists, good welding effect is ensured, and no liquid leakage or insufficient welding condition exists; after the welding and sealing are finished, no break exists, so that the welding and sealing device can be seen as a part from the appearance, and no assembly mark can be seen.

Drawings

Fig. 1 is a schematic perspective view of a compact square steel-shell battery of the present invention;

fig. 2 is an exploded view of the compact prismatic steel can battery shown in fig. 1;

fig. 3 is a cross-sectional view of the compact prismatic steel can cell of fig. 1.

Description of reference numerals:

the liquid filling machine comprises a lower cover 1, a winding core 2, an upper cover 3, a groove 11, a liquid filling hole 12, an insulating member 4 and a liquid filling hole cover plate 5.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1-3, the utility model provides a compact square steel shell battery, including lower cover 1, accept in roll core 2 in the lower cover, and locate upper cover 3 on the lower cover, the inner chamber of lower cover is for being used for accepting the chamber of accepting of roll core, around the periphery of lower cover on the chamber roof of lower cover seted up recess 11, be formed with the step between the groove perisporium of recess and the tank bottom wall of recess, the upper cover is located on the step.

In one embodiment, roll up the core including roll up the core body and locate two utmost point ears on the core body, each utmost point ear includes first portion, kink and second portion, the first portion with roll up this body coupling of core, the relative both ends of kink respectively with the first portion with the second portion is connected, the second portion with the first portion is parallel, the second portion with space between the first portion is the centre gripping chamber, be equipped with insulating part 4 in the centre gripping chamber of two utmost point ears.

In one embodiment, one of the two tabs is a positive tab, the other of the two tabs is a negative tab, the positive tab is connected with the positive electrode connecting piece of the lower cover, and the negative tab is connected with the negative electrode connecting piece of the lower cover.

In one embodiment, the lower cover is provided with a liquid injection groove, the wall of the liquid injection groove is provided with a plurality of liquid injection holes 12, and each liquid injection hole is communicated with the outside and the containing cavity. Specifically, the number of the liquid injection holes is at least 2.

In one embodiment, a liquid injection hole cover plate 5 is installed in the liquid injection groove and used for closing the liquid injection hole.

In one embodiment, the two tabs are respectively welded with the positive electrode connecting piece of the lower cover and the negative electrode connecting piece of the lower cover, the upper cover is fixedly connected with the lower cover in a welding mode, and the liquid injection hole cover plate is fixedly connected with the lower cover in a welding mode.

The assembly process of the compact square steel shell battery is as follows: the winding core is arranged in the lower cover according to requirements; the positive and negative lugs of the winding core are welded with the positive and negative electrode connecting pieces of the lower cover according to requirements, and the insulating pieces are adhered; sealing the upper cover and the lower cover by vertical welding; and injecting liquid from the liquid injection hole of the lower cover, and welding the cover plate of the liquid injection hole for sealing.

The above embodiments only express the embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as the limitation of the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a square steel-shelled battery of compact which characterized in that: including the lower cover, accept in roll up the core in the lower cover, and locate upper cover on the lower cover, the inner chamber of lower cover is for being used for acceping roll up the chamber of acceping of core, center on the chamber roof of lower cover the periphery of lower cover is seted up flutedly, the groove perisporium of recess with be formed with the step between the tank bottom wall of recess, the upper cover is located on the step.

2. The compact prismatic steel can battery of claim 1, wherein: roll up the core including roll up the core body and locate roll up two utmost point ears on the core body, each utmost point ear includes first portion, kink and second portion, the first portion with roll up this body coupling of core, the relative both ends of kink respectively with the first portion with the second portion is connected, the second portion with the first portion is parallel, the second portion with space between the first portion is the centre gripping chamber, be equipped with the insulating part in the centre gripping chamber of two utmost point ears.

3. The compact prismatic steel can battery of claim 2, wherein: two one of them in the utmost point ear is anodal utmost point ear, two another one in the utmost point ear is the negative pole utmost point ear, anodal utmost point ear with the anodal electrode connecting piece of lower cover is connected, the negative pole utmost point ear with the negative electrode connecting piece of lower cover is connected.

4. The compact prismatic steel can cell of claim 3, wherein: the lower cover is provided with a liquid injection groove, the groove wall of the liquid injection groove is provided with a plurality of liquid injection holes, and each liquid injection hole is communicated with the outside and the containing cavity.

5. The compact prismatic steel can battery of claim 4, wherein: and a liquid injection hole cover plate is installed in the liquid injection groove and used for sealing the liquid injection hole.

6. The compact prismatic steel can battery of claim 5, wherein: the two lugs are respectively welded with the positive electrode connecting piece of the lower cover and the negative electrode connecting piece of the lower cover, the upper cover is fixedly connected with the lower cover in a welding mode, and the liquid injection hole cover plate is fixedly connected with the lower cover in a welding mode.