Method for preventing corrosion inside soft packaging battery and electrode lug structure

A soft-pack battery and internal corrosion technology, which is applied in the direction of secondary batteries, structural parts, battery pack components, etc., can solve problems such as loss of water isolation, internal corrosion of soft-pack batteries, and aluminum layer rupture, so as to avoid electric shocks. Chemical reaction, effect of improving safety and service life

Inactive Publication Date: 2018-03-06
ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRAIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrolyte can penetrate into these cracks and make direct contact with the aluminum layer. Once the aluminum layer in the aluminum-plastic film and the negative electrode have an electronic circuit, the metal aluminum layer will unde

Method used

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  • Method for preventing corrosion inside soft packaging battery and electrode lug structure
  • Method for preventing corrosion inside soft packaging battery and electrode lug structure
  • Method for preventing corrosion inside soft packaging battery and electrode lug structure

Examples

Experimental program
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Example Embodiment

[0028] Example 1

[0029] Such as figure 1 In the embodiment shown, a tab structure for preventing corrosion in a soft pack battery includes a positive tab 1 and an aluminum-plastic film. The positive tab is rectangular, and the surface of the positive tab near the bottom is provided with a conductive adhesive layer 2. It is arranged along the width direction of the positive electrode ear, and the length of the conductive adhesive layer is greater than or equal to the width of the positive electrode ear. The aluminum plastic film includes an aluminum layer and a nylon layer on the outer surface of the aluminum layer. The conductive adhesive layer includes a basic material layer and a partial conductive adhesive layer. The basic material layer is one or a combination of single-layer PP, single-layer PE, multilayer PP, and multilayer PE. The local conductive adhesive layer is a combination of one or more of conductive metal material powder or fiber, conductive graphite, conductive...

Example Embodiment

[0031] Example 2

[0032] Such as figure 2 In the embodiment shown, a tab structure for preventing corrosion in a soft pack battery includes a positive tab 1 and an aluminum-plastic film. The positive tab is rectangular, and the surface of the positive tab near the bottom is provided with a conductive adhesive layer 2. It is arranged along the width direction of the positive electrode ear, and the length of the conductive adhesive layer is greater than or equal to the width of the positive electrode ear. The aluminum-plastic film includes an aluminum layer and a nylon layer on the outer surface of the aluminum layer, and the surface of the conductive adhesive layer is attached to the aluminum layer of the aluminum-plastic film.

[0033] The conductive adhesive layer includes a basic material layer 2a and a partial conductive adhesive layer 2b. The basic material layer is one or a combination of single-layer PP, single-layer PE, multilayer PP, and multilayer PE. The local conducti...

Example Embodiment

[0035] Example 3

[0036] Such as image 3 In the embodiment shown, a tab structure for preventing corrosion in a soft pack battery includes a positive tab 1 and an aluminum-plastic film. The positive tab is rectangular, and the surface of the positive tab near the bottom is provided with a conductive adhesive layer 2. It is arranged along the width direction of the positive electrode ear, and the length of the conductive adhesive layer is greater than or equal to the width of the positive electrode ear. The aluminum-plastic film includes an aluminum layer and a nylon layer on the outer surface of the aluminum layer, and the surface of the conductive adhesive layer is attached to the aluminum layer of the aluminum-plastic film.

[0037] The conductive adhesive layer includes a basic material layer 2a and two conductive components 2c. The basic material layer is one or a combination of single-layer PP, single-layer PE, multilayer PP, and multilayer PE. The conductive component is ...

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Abstract

The invention discloses a method for preventing corrosion inside a soft packaging battery and an electrode lug structure. The method comprises the following steps: a, coating a positive electrode lugof a soft packaging battery with a conductive adhesive layer, and enabling the conductive adhesive layer to contact an aluminum layer of a soft packaging battery aluminum-plastic film; b, coating a negative electrode lug of the soft packaging battery with an insulating adhesive layer, wherein the negative electrode lug is in insulating isolation from the aluminum-plastic film of the soft packagingbattery. The electrode lug structure comprises the positive electrode lug and the aluminum-plastic film, wherein the conductive adhesive layer is arranged onto the surface, close to the bottom, of the positive electrode lug; the length of the conductive adhesive layer is greater than the width of the positive electrode lug; the aluminum-plastic film comprises an aluminum layer and a nylon layer on the outer surface of the aluminum layer; the surface of the conductive adhesive layer is adhered to the aluminum layer of the aluminum-plastic film.

Description

technical field [0001] The invention belongs to the field of soft-pack batteries, and in particular relates to a method for preventing internal corrosion of soft-pack batteries and a tab structure. Background technique [0002] Soft-pack lithium-ion batteries have been widely used in the field of consumer electronics and electric vehicles due to their high specific energy, good safety, and flexible design. For example, the Chinese patent announcement number: CN102856580A discloses a lithium iron phosphate soft pack battery and its preparation method, which is to mix lithium iron phosphate material with conductive agent, binder, etc. to form positive electrode slurry; graphite and conductive agent, Binder and the like are mixed to form negative electrode slurry. Then apply the positive electrode slurry on the aluminum foil to make the positive electrode sheet, and apply the negative electrode slurry on the copper foil to make the negative electrode sheet. Then add the posit...

Claims

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Application Information

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IPC IPC(8): H01M2/32H01M2/26H01M10/0525H01M10/058H01M50/571H01M50/531
CPCH01M10/0525H01M10/058H01M50/531H01M50/571Y02E60/10Y02P70/50
Inventor 常林荣李洪涛任宁柯克刘新彪
Owner ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRAIAL
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