Polymer electrolyte hard packaging lithium ionic cell
A lithium-ion battery and polymer technology, applied in secondary batteries, battery components, circuits, etc., can solve problems such as failure, low yield, and shell damage, and reduce the probability of local short circuits Effect of improving high-temperature mechanical properties and safety performance
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example 1
[0071] The following method was used to produce a wound polymer electrolyte aluminum case lithium ion battery.
[0072] Manufacturing method of negative electrode belt:
[0073]Dissolve 3 grams of polyvinylidene fluoride in N-methyl-2-pyrrolidinedione, then add 2.5 grams of acetone black, and finally add 115 grams of graphite powder. After high-speed stirring, vacuum or static degassing, the slurry-like negative electrode slurry is made. The negative electrode slurry was coated on both surfaces of a 10 micron thick copper foil. Dry at 120°C to remove the solvent N-methyl-2-pyrrolidinedione, the thickness of the electrode strip is controlled at 300±10 microns, and the thickness of the electrode strip after rolling is controlled at 90±5 microns. Cut the negative electrode strip to 30x340mm 2 size. A nickel lead is then spot welded to the uncoated starting copper side.
[0074] Manufacturing method of positive electrode belt:
[0075] Dissolve 6 grams of polyvinylidene fluo...
example 2
[0083] The following method was used to produce a laminated polymer electrolyte aluminum case lithium-ion battery.
[0084] Manufacturing method of negative electrode belt:
[0085] Dissolve 3 grams of polyvinylidene fluoride in N-methyl-2-pyrrolidinedione, then add 3 grams of acetone black, and finally add 115 grams of graphite powder. After high-speed stirring, vacuum or static degassing, the slurry-like negative electrode slurry is made. The negative electrode slurry was coated on both surfaces of a 10 micron thick copper foil. The solvent N-methyl-2-pyrrolidinedione was dried and removed at 120° C., and the thickness of the electrode strip was controlled at 300±10 microns. The thickness of the electrode strip after rolling is controlled at 90±5 microns. Cut the negative electrode strip into a kitchen knife shape: the area of the main knife is 30x50mm 2 Dimensions, handle area 5x7mm 2 Size, the handle part is uncoated copper foil, and its surface will be spot-welded ...
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