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Safe cylindrical lithium-manganese dioxide battery

A manganese dioxide battery and cylinder technology, which is applied to lithium batteries, secondary batteries, batteries with organic electrolytes, etc., can solve the problems of high probability of batteries flying out of long distances, failure to meet safety requirements of lithium batteries, and severe battery explosions. , to achieve the effect of increasing the volume, eliminating glass corrosion and improving safety

Active Publication Date: 2012-06-27
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual safety test, since the rigid notch is directly opened when the internal pressure of the battery rises, there is no deformation buffer, resulting in a high probability of violent explosion of the battery and a long-distance flying of the battery, which cannot meet the requirements of the US UL1642 standard. Safety requirements for lithium batteries

Method used

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  • Safe cylindrical lithium-manganese dioxide battery
  • Safe cylindrical lithium-manganese dioxide battery
  • Safe cylindrical lithium-manganese dioxide battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] CR17335 cylindrical lithium-manganese dioxide battery, which includes a positive electrode sheet with manganese dioxide as the active material, and a metal lithium negative electrode sheet. The length ratio of the positive and negative electrodes is 1:0.70, the width ratio is 1:0.80, and the thickness ratio The ratio is 1:0.45, the positive and negative electrodes are separated by an ion-permeable microporous membrane, and wound into a cylindrical core with a safety structure. It is connected with the T-shaped pole of the hot-melt, anti-electrolyte-corroded sealing assembly. The two ends of the winding core are respectively equipped with a polyethylene upper insulating ring and a polytetrafluoroethylene lower insulating ring. The carbon steel battery case is designed with a self-starting explosion-proof The pressure relief device and the sealing assembly are connected to the carbon steel battery casing by argon arc welding.

[0034] The hot-melt, electrolyte-resistant s...

Embodiment 2

[0042] CR17335 cylindrical lithium-manganese dioxide battery, which consists of a positive electrode sheet with manganese dioxide as the active material and a lithium metal negative electrode sheet. The length ratio of the positive and negative electrodes is 1:0.77, the width ratio is 1:0.88, and the thickness The ratio is 1:0.50. The positive and negative electrodes are separated by an ion-permeable microporous membrane, and wound into a cylindrical core with a safe structure. The positive electrode is connected to the 304 stainless steel battery case through tabs, and the negative electrode is connected through The lugs are connected to the T-shaped pole of the hot-melt, electrolyte-resistant sealing assembly, and the two ends of the winding core are respectively equipped with an upper insulating ring made of a mixture of polytetrafluoroethylene and polyethylene and a lower insulating ring made of polystyrene , The 304 stainless steel battery casing is designed with a self-st...

Embodiment 3

[0051] CR17335 cylindrical lithium-manganese dioxide battery, which includes a positive electrode sheet with manganese dioxide as the active material, and a metal lithium negative electrode sheet. The length ratio of the positive and negative electrodes is 1:0.85, the width ratio is 1:0.95, and the thickness ratio The ratio is 1:0.55. The positive and negative electrodes are separated by an ion-permeable microporous membrane and wound into a cylindrical core with a safety structure. The positive electrode is connected to the aluminum battery shell through the tab, and the negative electrode is connected to the T-shaped pole connection of hot-melt, electrolyte-resistant sealing assembly, with plastic PTFE upper insulating rings and lower insulating rings made of polystyrene and polypropylene mixture materials at both ends of the core, aluminum The battery casing is designed with a self-starting explosion-proof pressure relief device, and the sealing assembly is connected to the ...

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Abstract

The invention relates to a cylindrical lithium-manganese dioxide battery. The safe cylindrical lithium-manganese dioxide battery comprises a battery case and a safe structure winding core positioned in the battery case, wherein a positive plate is connected with the battery case by a lug, a negative plate is connected with a seal assembly by the lug, and both ends of the safe structure winding core are respectively provided with an upper insulating ring and a lower insulating ring which play the roles of isolation, insulation, supporting and shock absorption. A circular cover plate of the hotmelt electrolyte corrosion-resisting seal assembly is connected with the battery case by way of welding. The seal assembly comprises a T-shaped terminal post, sealed insulating plastics, the circularcover plate and a connecting ring. A self-starting blast-proof pressure relief device is designed on the top of the battery case and comprises a pressure release valve, a deformable groove, a positive terminal and an air chamber. The cylindrical lithium-manganese dioxide battery optimizes the dimension scales of the positive plate and the negative plate of the winding core, as well as the seam assembly, the sealing material quality and the pressure relief device on the battery case, thereby enhancing the safety of the battery, prolonging the storage life thereof and reducing the cost of production and materials simultaneously.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and more specifically relates to the improvement of the structure and material of a cylindrical lithium-manganese dioxide battery. Background technique [0002] There are two types of sealing methods for cylindrical lithium-manganese dioxide batteries: semi-sealed and fully-sealed. The former adopts buckle edge seal, and the operating temperature range of this kind of battery is relatively narrow. When the ambient temperature exceeds 60°C, the battery is prone to electrolyte leakage. The battery involved in the present invention belongs to the fully sealed mode and is welded and sealed. The battery has good weather resistance and a wider service temperature range, and is widely used in industrial and military fields. At present, in the sealing assembly of the fully sealed cylindrical lithium-manganese dioxide battery, glass is used as the insulating material between the negative c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/14H01M6/16H01M10/052H01M2/12H01M2/08H01M2/10H01M2/30H01M2/04H01M10/0587H01M50/152H01M50/176H01M50/188H01M50/193H01M50/242H01M50/342H01M50/367H01M50/383H01M50/559
CPCY02E60/12Y02E60/122Y02E60/10Y02P70/50
Inventor 吕正中黄国民刘金成袁中直
Owner EVE ENERGY CO LTD
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