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Cylindrical battery housing and cylindrical battery

A cylindrical battery, cylindrical technology, applied in secondary batteries, battery pack components, circuits, etc., can solve the problems of difficulty in welding the conductive terminals of the battery and the battery shell, difficulty in welding the cover plate, and difficult position control, etc., to avoid The effect of battery explosion, good welding quality and accurate positioning

Active Publication Date: 2008-01-30
SHENZHEN BAK POWER BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This production method solves the technical problem of difficult welding of the battery conductive terminal and the battery case, but it also creates the following problems: Since the cylinder is transparent and bottomless, it is difficult to control the position of the battery unit after it is installed in the cylinder during the production process , The battery unit is easy to slide in the barrel, which makes assembly difficult, and also causes certain difficulties for the subsequent welding of the cover plate

Method used

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  • Cylindrical battery housing and cylindrical battery
  • Cylindrical battery housing and cylindrical battery

Examples

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Embodiment 1

[0024] Embodiment 1: With reference to FIGS. 1 to 4, a cylindrical battery includes a cylindrical battery casing cylinder 1, a battery unit 10, an upper cover 3 and a lower cover 4. The top of the cylindrical battery case barrel 1 is open, the top of the cylindrical battery case barrel 1 is provided with a step 9 that facilitates the engagement with the upper cover 3, and the bottom of the cylindrical battery case barrel 1 has a stepped opening 2 The support table 8 is used to support the battery unit 10. The outer edge of the lower cover 4 is provided with a step 6 that matches the stepped opening 2, and the lower cover 4 is also provided for timely pressure relief and avoid battery The exploded groove 5 and the lower cover plate 4 are welded and sealed on the stepped opening 2 of the support table 8. In addition, the outer surface of the lower cover plate 4 is plated with metallic nickel 7 to facilitate the battery welding of wires. The metal nickel 7 coating can also be replace...

Embodiment 2

[0027] As shown in Figure 5, a cylindrical battery case. The bottom of the cylindrical battery case barrel 1 is a support table 8 with a cone-shaped opening 2. Correspondingly, the outer edge of the lower cover 4 is set to correspond to it. Cone surface 6 (not drawn).

[0028] The manufacturing method of the above-mentioned battery casing: the aluminum cylindrical battery casing barrel is formed by stamping. The stamping process includes: 1) cutting the blank from the plate into a disc shape; 2) drawing the disc-shaped blank into a bottomed cylinder of the required shape; 3) punching a through hole at the bottom of the cylinder; 4) Punching the perimeter of the through hole to form the perimeter into the desired shape, such as stepped or truncated cone. Among them, blanking and deep drawing into a bottomed cylinder are conventional processing methods. The bottom step hole is processed as follows: first punch the bottom of the bottom cylinder, then press the bottom step, and finall...

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Abstract

The invention relates to a cylindrical battery shell, comprising a cylinder, an upper cover plate and a lower cover plate, and is characterized in that the head of the cylinder is open and an open supporting table is arranged at the bottom of the cylinder, the lower cover plate is covered on the open mouth of the supporting table, and further more, the open mouth is a step-shaped mouth or a conical mouth, the invention further relates to a cylindrical battery made by the shell. Applying the technic proposal, the invention provides a cylindrical battery shell and a cylindrical battery which is convenient for equipping and locating battery unit, and prevents the battery unit from skipping in the shell.

Description

【Technical Field】 [0001] The invention relates to a cylindrical battery casing and a cylindrical battery, in particular to a cylindrical lithium battery. 【Background technique】 [0002] Lithium-ion battery is a large-capacity, high-power battery, which is mainly used in small devices, especially mobile phones, laptop computers, and portable power tools. Lithium-ion batteries are generally composed of a cell cover, a battery can, an electrolyte, and a battery unit wound from positive and negative sheets and diaphragm paper. In the prior art, the encapsulation of lithium-ion batteries usually adopts the following steps: first load the wound battery core into the battery can; then weld the connecting lead strips of the positive and negative plates with the cover plate assembly; and then the cover plate The opening of the battery can is sealed by laser welding, thus forming a container with the battery core. In order to improve the welding process of the tabs, the industry has adopte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M10/40H01M10/0525H01M50/107H01M50/169H01M50/179H01M50/552
CPCY02E60/122Y02E60/10
Inventor 毛焕宇黄加军郑荣鹏吴抗张峰张建文
Owner SHENZHEN BAK POWER BATTERY CO LTD
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