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Encapsulation method capable of preventing rising of internal resistance of ultrathin polymer battery

A technology of battery internal resistance and packaging method, applied in battery assembly, secondary battery manufacturing, battery pack components, etc., can solve problems such as battery temperature rise and electrolyte damage, reduce heat sealing area and reduce heat The effect of generating and maintaining performance

Inactive Publication Date: 2017-12-26
SHANDONG REALFORCE ENTERPRISES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of electrolyte destruction caused by the temperature rise of the battery due to the heat conduction generated during the hot pressing process of the aluminum-plastic film of the ultra-thin battery, so as not to affect the conductivity and other properties of the battery

Method used

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  • Encapsulation method capable of preventing rising of internal resistance of ultrathin polymer battery
  • Encapsulation method capable of preventing rising of internal resistance of ultrathin polymer battery
  • Encapsulation method capable of preventing rising of internal resistance of ultrathin polymer battery

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Embodiment Construction

[0032] Such as Figure 1-6 As shown, a packaging method to prevent the internal resistance of ultra-thin polymer batteries from increasing, uses 1 heat-sealing film to perform hot-press packaging on 2 ultra-thin batteries, and uses the following steps to package 2 ultra-thin batteries:

[0033] A, such as figure 1 As shown, wrap 2 ultra-thin batteries with 1 heat-sealing film, and heat-press seal 1 heat-sealing film on three sides of 2 ultra-thin batteries (3, 4, 5);

[0034] B isolating 1 heat-sealing film on the remaining side of 2 ultra-thin batteries 6 with 7 separators, the longitudinal height of the 7 separators being less than 1 / 5 of the height of 2 ultra-thin batteries;

[0035] C as figure 2 As shown, the heat-sealing film on the remaining side of 6 in step B is heat-press-packaged to form 9 packaging lines, and the width of the heat-sealing film on the remaining side of the 2 ultra-thin batteries 6 is greater than that of 2 ultra-thin batteries. The width of the ...

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Abstract

The invention discloses an encapsulation method capable of preventing the rising of the internal resistance of an ultrathin polymer battery. An ultrathin cell is encapsulated by a heat sealing film through hot-press encapsulation. The ultrathin cell is encapsulated by the following steps: isolating residual one side of the ultrathin cell and the heat sealing film by an isolating film, wherein the vertical height of the isolating film is less than one half of the height of the ultrathin cell; subjecting the heat sealing film of the residual side to hot-press encapsulation, removing the isolating film to form a liquid inlet; injecting electrolyte, carrying out formation, laying up the ultrathin cell, and sealing the liquid inlet of the ultrathin cell through hot-press encapsulation to complete sealing to obtain the ultrathin battery. The provided method solves the problem that the electrolyte is destroyed by temperature rising of the battery, the temperature rising is caused by thermal conductivity generated in an ultrathin battery aluminum-plastic film hot-press encapsulation technology, and the battery conductivity and other properties of the battery are not influenced.

Description

technical field [0001] The invention belongs to the field of ultra-thin polymer battery production, and in particular relates to a packaging method for preventing the internal resistance of the ultra-thin polymer battery from increasing. Background technique [0002] Ultra-thin lithium-ion batteries are a development trend. At present, people in the field have realized the design of ultra-thin batteries and proposed various implementation methods. However, in the production process, it is often found that the ultra-thin batteries produced , the internal resistance rises for no reason, and the rate performance, low temperature performance and cycle performance cycle life decrease. Taking an ultra-thin battery with a thickness of 1mm as an example, the design capacity is 80mAh. According to experience, the battery with the same electrochemical system, the internal resistance It is inversely proportional to the capacity. The internal resistance of an 800mAh battery is about 35m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M10/04H01M10/058H01M50/543
CPCH01M10/0404H01M10/0436H01M10/058H01M50/543Y02E60/10Y02P70/50
Inventor 何永
Owner SHANDONG REALFORCE ENTERPRISES
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