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An activated emulsion for welding power lithium battery joints

A technology for welding power and lithium batteries, used in welding media, welding equipment, battery pack components, etc. It can solve problems such as easy and difficult welding, and achieve the effects of convenient feeding, moderate viscosity and excellent physical properties.

Active Publication Date: 2018-01-23
LICHUANG TAISHAN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is not an easy task to weld the joints well. Because there is a dense oxide film on the surface of aluminum, ordinary welding materials are difficult to weld, and it is also a problem that needs to be solved urgently in the production of battery joints.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An activated emulsion for welding power lithium battery joints, the composition weight ratio includes: 20% paste, 80% active alloy powder,

[0028] Wherein, the composition weight proportion of described paste comprises: polyvinyl alcohol 5%, white oil 35%, active flux 60%,

[0029] The composition weight ratio of the active alloy powder includes: Si: 3%, Cu: 0.05%, Ag: 0.1%, Ga: 0.006%, Ge: 0.05%, impurities are less than 0.2%, and the balance is Al.

Embodiment 2

[0031] An activated emulsion for welding power lithium battery joints, the composition weight ratio includes: 25% paste, 75% active alloy powder,

[0032] Wherein, the composition weight ratio of the paste comprises: 10% methyl silicone oil, 35% white oil, 55% active brazing flux,

[0033] The composition weight ratio of the active alloy powder includes: Si: 20%, Zn: 0%, Cu: 0.1%, Ag: 0.1%, Ga: 0.02%, Ge: 0.1%, impurities are less than 0.2%, and the balance is Al.

Embodiment 3

[0035] An activated emulsion for welding power lithium battery joints, the composition weight ratio includes: 20% paste, 80% active alloy powder,

[0036] Wherein, the composition weight proportion of described paste comprises: polyethylene glycol 10%, propylene glycol 25%, active flux 65%,

[0037] The composition weight ratio of the active alloy powder includes: Si: 13%, Zn: 0%, Cu: 0.05%, Ag: 0.1%, Ga: 0.04%, Ge: 0.05%, impurities are less than 0.2%, and the balance is Al.

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Abstract

The invention discloses an activated emulsion for welding power lithium battery joints. The composition weight ratio includes: 5%-50% of paste, 50%-95% of active alloy powder. Through the above method, the activated emulsion used for welding power lithium battery joints of the present invention has moderate viscosity, no tailing, convenient feeding, low welding temperature, excellent fluidity, no halides, no corrosion after welding, no residue and no moisture absorption, Welding has the advantages of excellent physical properties, remarkable thermal fatigue resistance, no oxidation, high electrical conductivity, and convenient welding use. It has broad market prospects in the popularization of activated emulsions for welding power lithium battery joints.

Description

technical field [0001] The invention relates to the field of emulsions, in particular to an activated emulsion used for welding power lithium battery joints. Background technique [0002] Earlier large buses or brand electric vehicles generally used lead-acid batteries as power sources, but lead-acid batteries have disadvantages such as low capacity density, heavy weight, single voltage, and environmental pollution that cannot be overcome. Lithium batteries are currently widely used in automotive power due to their advantages such as high terminal voltage, large specific energy, long charge and discharge life, stable discharge performance, low self-discharge rate, and no pollution to the environment. [0003] Automobile power batteries exist in the form of battery packs. In order to make these rechargeable batteries have sufficient battery capacity, the battery packs are connected by multiple lithium battery cells as the power source of the car, so the environment in which t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28H01M2/30H01M50/566
CPCB23K35/288H01M50/543Y02E60/10
Inventor 梁力强何锡坚范晶波梁洁明
Owner LICHUANG TAISHAN ELECTRONICS TECH
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