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Explosion-proof lithium battery

A lithium-ion battery and inner core technology, which is applied in battery pack parts, electrolyte storage battery manufacturing, non-aqueous electrolyte storage batteries, etc., can solve problems such as dangerous accidents, combustion, positive and negative film short circuit, etc., and reduce safety hazards Effect

Active Publication Date: 2019-01-08
武义县盛隆金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to its excellent performance, lithium batteries are very popular in various fields; however, due to the strong chemical activity of lithium ions, the danger of lithium ions is also high, especially the physical damage to lithium batteries is not allowed, such as using metal pointed cones to damage lithium batteries. When puncturing, it is easy to short-circuit the positive and negative film layers inside the lithium battery due to metal penetration, resulting in rapid heating and burning of the lithium battery, and in severe cases, explosion
In particular, for the current cylindrical lithium battery, the positive and negative film layers inside are rolled into one body around the axis of the battery. A short circuit occurs at any place, so it is very prone to dangerous accidents

Method used

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  • Explosion-proof lithium battery
  • Explosion-proof lithium battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] exist figure 1 In the first embodiment shown, the explosion-proof lithium battery includes a cylindrical shell 1, and an inner core 2 disposed inside the shell 1; Core film, the inner core film is reciprocally folded to form the inner core 2; the inner core 2 is packaged in a cylindrical metal inner shell 3 coaxial with the outer shell 1, and the outside of the inner shell 3, etc. A metal sheet 31 extending along the axial direction and parallel to the folded surface of the inner core film is distributed; the inner shell 3 can rotate freely around its own axis, and the positive electrode film of the inner core 2 is electrically pivoted to the The positive terminal (not shown) at one end of the shell, and the negative film is electrically pivoted to the negative terminal (not shown) at the other end of the shell.

[0014] In the above-mentioned explosion-proof lithium battery, the common outline of all the metal sheets 31 constitutes an outer circle (actually most of th...

Embodiment 2

[0018] exist figure 2 In the shown second embodiment, different from the first embodiment, there is a magnetic bar 4 inside the inner shell 3 which is perpendicular to the axis of the battery and parallel to the folded surface of the inner core film. The two ends of the rod 4 support the inner casing 3; thus, the magnetic rod 4 not only makes the battery difficult to deform under hammering, but also can make the inner casing 3. Under magnetic traction, automatically rotate to the position where the metal sheet 31 is nearly parallel to the axis of the conical iron.

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Abstract

The invention provides an explosion-proof lithium battery, which includes a cylindrical casing and an inner core arranged in the casing; the inner core includes an inner core film formed by laminating a positive electrode film, a diaphragm, and a negative electrode film, and the inner core The film is folded back and forth to form the inner core; the inner core is packaged in a cylindrical metal inner shell coaxial with the outer shell, and the outer shell of the inner shell is equidistantly distributed along the axial direction and parallel to the inner shell. The metal sheet on the folded surface of the inner core film; the inner shell can rotate freely around its own axis, the positive film of the inner core is electrically pivoted to the positive terminal at one end of the shell, and the negative film is electrically pivoted to the The negative terminal on the other end of the housing. After the battery is punctured by the metal sharp cone, it is difficult to penetrate the positive and negative film layers, so that dangerous accidents are not easy to occur, and it has high safety.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a cylindrical lithium ion battery. Background technique [0002] Due to its excellent performance, lithium batteries are very popular in various fields; however, due to the strong chemical activity of lithium ions, the danger of lithium ions is also high, especially the physical damage to lithium batteries is not allowed, such as using metal pointed cones to damage lithium batteries. When puncturing, it is easy to cause the positive and negative film layers inside the lithium battery to be short-circuited by metal penetration, causing the lithium battery to heat up rapidly, burn, and in severe cases, explode. In particular, for the current cylindrical lithium battery, the positive and negative film layers inside are rolled into one body around the axis of the battery. In this case, if a metal cone penetrates into the lithium battery, more positive and negative film layers will A short c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/12H01M10/058
CPCH01M10/058H01M50/3425Y02E60/10Y02P70/50
Inventor 马根昌
Owner 武义县盛隆金属制品有限公司