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Positive steel shell of button lithium battery and button lithium battery

A battery steel shell and lithium battery technology, which is applied in the direction of secondary batteries, battery pack parts, non-aqueous electrolyte storage batteries, etc., can solve the problems of large self-discharge of batteries, achieve uniform thickness, reduce process, and simple process

Inactive Publication Date: 2011-07-06
GUANGZHOU GREAT POWER ENERGY & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method not only requires the use of coating to form a conductive anti-corrosion layer, the uniform coating of metal itself is a complicated process, but also the self-discharge of the button battery produced by this method passed the high-temperature storage test at 60 ° C. larger

Method used

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  • Positive steel shell of button lithium battery and button lithium battery
  • Positive steel shell of button lithium battery and button lithium battery
  • Positive steel shell of button lithium battery and button lithium battery

Examples

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Embodiment 1

[0022] Example 2:

Embodiment 2

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Embodiment 3

[0026] Example 4:

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Abstract

The invention discloses a positive steel shell of a button lithium battery and the button lithium battery, and belongs to the field of batteries. The positive steel shell of the button lithium battery is an open shell, wherein the inner surface of the positive steel shell is provided with a metal anti-corrosion layer with high oxidation potential; and the metal anti-corrosion layer with the high oxidation potential is made of an aluminum foil or aluminum alloy and has the thickness of between 5 and 35mu m. Through the metal anti-corrosion layer, the positive steel shell of the button lithium battery is not subjected to electrochemical corrosion in an entire working voltage range, internal resistance and self-discharge of the battery are obviously reduced, and the electrochemical performance is high. Through the positive steel shell and the button lithium battery, the electrochemical corrosion of the battery steel shell due to the high oxidation potential can be avoided, the self-discharge and the internal resistance of the battery are reduced, and the button lithium battery has high performance.

Description

technical field [0001] The positive electrode steel case of the button lithium battery and the button lithium battery of the invention belong to the field of batteries. Background technique [0002] Button-type lithium batteries are mainly used in computer motherboards, MP3, watches, calculators, IC cards, electronic dictionaries, tax control machines, Bluetooth headsets, hand-cranked rechargeable flashlights, toy walkie-talkies and other products. , the voltage of the battery drops and the internal resistance increases, resulting in the continuous deterioration of the electrochemical performance. After research, it is found that the deterioration of the performance of the button lithium battery is closely related to the steel case of the battery. Button-type lithium batteries are composed of battery steel case, positive electrode sheet, negative electrode sheet, diaphragm and electrolyte. Usually, the material of button-type lithium battery steel case is stainless steel. Wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M10/0525H01M10/058
CPCY02E60/12Y02E60/122Y02E60/10Y02P70/50
Inventor 刘青崔燕薛建军
Owner GUANGZHOU GREAT POWER ENERGY & TECH CO LTD
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