Composite Electrode Plate and Battery Cell

The present invention provides a composite electrode plate including a current collector. The current collector has a first surface and a second surface that are opposite to each other. A positive electrode active material layer is provided on the first surface, and a negative electrode active material layer is provided on the second surface. The length of the current collector is Lthe length of the negative electrode active material layer is L and the length of the positive electrode active material layer is L the width of the current collector is W the width of the negative electrode active material layer is W and the width of the positive electrode active material layer is W wherein LLL and/or, WWW. The present invention also provides a battery cell.