A kind of aluminum-plastic film of polymer lithium ion battery and method for punching the same
A lithium-ion battery and aluminum-plastic film technology, which is applied to battery components, circuits, electrical components, etc., can solve the problem of affecting the appearance and dimensional stability of batteries, affecting the quality of polymer lithium-ion batteries, and wrinkling of aluminum-plastic films and other issues to achieve the effects of high production efficiency, cost control, and quality assurance
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Embodiment 1
[0030] Such as image 3 As shown, an aluminum-plastic film of a polymer lithium-ion battery includes an aluminum-plastic film body 1, and the aluminum-plastic film body 1 is provided with a winding core groove 2 for packaging a winding core of a polymer lithium-ion battery , it also includes two folded grooves 3 arranged symmetrically along the centerline 4 of the aluminum-plastic film body 1, and the two folded grooves 3 include a folded groove 31 and a folded convex groove 32.
[0031] When in use, the winding core of the polymer lithium ion battery is put into the groove 2 of the winding core, and then the aluminum-plastic film body 1 is folded in half. It can align the alignment sides 5 after folding in half to ensure that there will be no misalignment, and avoid the phenomenon of air inflation and liquid leakage in the polymer lithium-ion battery caused by the wrinkling of the aluminum-plastic film, so as to ensure the quality of the polymer lithium-ion battery and ensure...
Embodiment 2
[0036] Such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that there are two winding core grooves 2 in this embodiment, and the two winding core grooves 2 are along the centerline of the aluminum-plastic film body 1 4 symmetrical settings.
[0037] When the capacity of the polymer lithium-ion battery is large, the winding core body is also thicker. At this time, two winding core body grooves 2 are symmetrically arranged on the center line 4 of the aluminum-plastic film body 1. When the aluminum-plastic film body 1 is folded in half, the two Each winding core groove 2 forms a larger accommodation space, which can accommodate a thicker winding core to meet the needs of large-capacity polymer lithium-ion batteries, and has a wider application range.
[0038] Features that are not explained in this embodiment are explained in Embodiment 1, and will not be repeated here.
preparation Embodiment 1
[0040] A shell punching method for preparing the aluminum-plastic film of the polymer lithium ion battery of Example 1, comprising the following preparation steps:
[0041] (a) Punch out the winding core groove 2 for the winding core body of the polymer lithium-ion battery package on the side of the centerline 4 of the aluminum-plastic film body 1;
[0042] (b) Punch out two matched double-fold grooves 3 symmetrically along the center line 4 of the aluminum-plastic film body 1 , one of which is a double-fold groove 31 and the other is a double-fold convex groove 32 .
[0043] The shell punching method of this embodiment is simple, and the prepared aluminum-plastic film will not be dislocated when folded in half, and the production efficiency is high. It only needs to add a mold for punching the folded convex groove 32 and the folded groove 31 on the basis of the original shell punching die. That is, the precision of the mold is not high, and the production cost is effectively ...
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