Quick film removing and firm tin soldering grouping method for soft-packed lithium battery with low resistance, low heat and large over-current
A soft-pack lithium battery and tin brazing technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of laser head loss, high replacement rate, can not withstand repeated bumps, and affect over-power, etc. The effect of increasing cost and flight weight, avoiding system errors, and ensuring flight safety
Pending Publication Date: 2019-10-15
胡景辉
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Abstract
The invention can realize tin soldering grouping of a soft-packed power ternary lithium battery. Firstly, the positive aluminum electrode of one battery and an adapter sheet (to nickel) or the negative plate of another battery (series connection) are pre-tightened and bonded by traditional spot welding, hot pressing (simplified treatment) or superimposing, so that the joint of the aluminum and nickel sheets is rigid and flat, and an aluminum oxide film can be removed quickly with a rotary steel wire brush. Then, additive-containing aluminum welding solder wires are applied by melt-coating (brazing) with a soldering iron, and welding can be completed firmly and quickly (about two seconds). Scald due to long-time introduction of high temperature into the cells is avoided. Compared with the existing grouping method, the connection resistance can be reduced, high current can be borne, less heat is produced, bump can be resisted, and the hidden danger of thermal runaway can be reduced. A pure nickel sheet can be replaced with a nickel-plated copper strip without copper-aluminum reaction, and the cost can be reduced. The soft-packed power ternary lithium battery can be used in all kindsof electric cars, unmanned aerial vehicles, two-wheeled and three-wheeled electric vehicles, and the like.
Application Domain
Cell component detailsSoldering auxillary devices
Technology Topic
Thermal runawayCopper tape +20
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