Winding-type cell
A winding type battery technology, applied in the direction of circuits, electrical components, secondary batteries, etc., can solve the problems of waste of separator 3, reduce the energy density of batteries, increase the thickness of batteries, etc., to save costs and realize automation The effect of production and energy density improvement
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[0029] Hereinafter, the wound cell of the present invention will be described in detail with reference to the drawings.
[0030] Reference Figure 2 to Figure 5 The wound cell according to the present invention includes: a first pole piece 1 having a first current collector 11 and a first active material layer 12 coated on at least one surface of the first current collector 11; a second pole piece 2 , Having a second current collector 21 and a second active material layer 22 coated on at least one surface of the second current collector 21, and the second winding start section E2 of the second pole piece 2 has an uncoated second active material The blank second current collector 211 of the layer 22; the isolation film 3 is arranged between the first pole piece 1 and the second pole piece 2 to separate the first pole piece 1 and the second pole piece 2; the first pole lug 4. It is electrically connected to the first current collector 11; the second tab 5 is fixed to the blank seco...
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