Pole piece, battery cell, electric device and manufacturing method of battery cell

Abstract

The invention discloses a pole piece, a battery cell, a power utilization device and a manufacturing method of the battery cell. The pole piece comprises a current collector; the current collector comprises a first conductive layer, a supporting layer and a second conductive layer which are stacked along a first direction; the supporting layer is provided with a first surface and a second surface opposite to each other along a first direction; the first conductive layer is connected to the first surface of the supporting layer; the second conductive layer is connected to the second surface of the supporting layer; the current collector further comprises a conductive component which penetrates through the supporting layer in the first direction and is welded to the supporting layer. The first end of the conductive member is welded to the first conductive layer, and the second end of the conductive member is welded to the second conductive layer. According to the pole piece, the battery cell, the power utilization device and the manufacturing method of the battery cell provided by the embodiment of the invention, the tab can be reliably connected with the first conductive layer and the second conductive layer while the overall occupied space of the tab region is not increased, and the quality of the battery cell is improved.

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