Cover plate assembly, battery, and method for assembling battery

1. A cover plate assembly, applied to a battery and comprising:

a cover plate comprising a cover plate body and a carrier portion connected with each other, wherein the cover plate body has a first surface and a second surface opposite to each other, the cover plate body is disposed around an external periphery of the carrier portion, the carrier portion is recessed from the first surface, the carrier portion and the cover plate body cooperatively define a first recess, and the carrier portion defines a first through hole communicating with the first recess; and when the cover plate assembly is applied to the battery, the first surface is closer to an outside of the battery than the second surface;

a pole disposed in the first recess, abutting against the carrier portion and configured to be electrically connected with a current collector of the battery, wherein the pole defines a second through hole, the pole comprises an abutting portion and a pole body connected with each other, the abutting portion is disposed in the first recess and abuts against the carrier portion, the pole body exceeds the first surface, and the second through hole penetrates through the abutting portion and the pole body; and

an explosion-proof assembly comprising an explosion-proof valve and a protective sheet, wherein the explosion-proof valve and the protective sheet are disposed in the second through hole, the explosion-proof valve is spaced apart from the protective sheet, the explosion-proof valve is disposed closer to the second surface than the protective sheet, and the explosion-proof valve is configured to seal the second through hole, wherein

the second through hole comprises a first through sub-hole and a second through sub-hole that communicate with each other in a bent manner, the first through sub-hole penetrates through a surface of the abutting portion away from the pole body, the explosion-proof valve is disposed in the first through sub-hole, the second through sub-hole penetrates through a surface of the pole body connected with the abutting portion, and the protective sheet is disposed in the second through sub-hole.

2. The cover plate assembly of claim 1 , wherein the abutting portion exceeds the pole body in a direction perpendicular to an arrangement direction of the abutting portion and the pole body.

3. The cover plate assembly of claim 1 , wherein the abutting portion has a first end surface away from the pole body, and the abutting portion further defines a second recess penetrating through the first end surface, the second recess communicates with the first through sub-hole, the second recess has a radial size larger than the first through sub-hole, and the explosion-proof valve is disposed in the second recess and abuts against the second recess at a bottom wall of the second recess.

4. A battery, comprising:

a battery body; and

a cover plate assembly, configured to seal the battery body, and configured to be electrically connected with an electricity-consumption device, wherein the cover plate assembly comprises:

a cover plate comprising a cover plate body and a carrier portion connected with each other, wherein the cover plate body has a first surface and a second surface opposite to each other, the cover plate body is disposed around an external periphery of the carrier portion, the carrier portion is recessed from the first surface, the carrier portion and the cover plate body cooperatively define a first recess, and the carrier portion defines a first through hole communicating with the first recess; and when the cover plate assembly is applied to the battery, the first surface is closer to an outside of the battery than the second surface;

a pole disposed in the first recess, abutting against the carrier portion and configured to be electrically connected with a current collector of the battery, wherein the pole defines a second through hole, the pole comprises an abutting portion and a pole body connected with each other, the abutting portion is disposed in the first recess and abuts against the carrier portion, the pole body exceeds the first surface, and the second through hole penetrates through the abutting portion and the pole body; and

an explosion-proof assembly comprising an explosion-proof valve and a protective sheet, wherein the explosion-proof valve and the protective sheet are disposed in the second through hole, the explosion-proof valve is spaced apart from the protective sheet, the explosion-proof valve is disposed closer to the second surface than the protective sheet, and the explosion-proof valve is configured to seal the second through hole, wherein

the second through hole comprises a first through sub-hole and a second through sub-hole that communicate with each other in a bent manner, the first through sub-hole penetrates through a surface of the abutting portion away from the pole body, the explosion-proof valve is disposed in the first through sub-hole, the second through sub-hole penetrates through a surface of the pole body connected with the abutting portion, and the protective sheet is disposed in the second through sub-hole.

5. The battery of claim 4 , wherein the abutting portion exceeds the pole body in a direction perpendicular to an arrangement direction of the abutting portion and the pole body.

6. The battery of claim 4 , wherein the abutting portion has a first end surface away from the pole body, and the abutting portion further defines a second recess penetrating through the first end surface, the second recess communicates with the first through sub-hole, the second recess has a radial size larger than the first through sub-hole, and the explosion-proof valve is disposed in the second recess and abuts against the second recess at a bottom wall of the second recess.

7. A method for assembling a battery, comprising:

providing a cover plate, wherein the cover plate comprises a cover plate body and a carrier portion connected with each other, the cover plate body has a first surface and a second surface opposite to each other, the cover plate body is disposed around an external periphery of the carrier portion, the carrier portion is recessed from the first surface, the carrier portion and the cover plate body cooperatively define a first recess, and the carrier portion defines a first through hole communicating with the first recess; and when the cover plate assembly is applied to the battery, the first surface is closer to an outside of the battery than the second surface;

providing a pole, wherein the pole is inserted into the first recess from the first surface of the cover plate, the pole abuts against the carrier portion, the pole is configured to be electrically connected with a current collector of the battery, the pole defines a second through hole, the pole comprises an abutting portion and a pole body connected with each other, the abutting portion is disposed in the first recess and abuts against the carrier portion, the pole body exceeds the first surface, and the second through hole penetrates through the abutting portion and the pole body; wherein the second through hole comprises a first through sub-hole and a second through sub-hole that communicate with each other in a bent manner, the first through sub-hole penetrates through a surface of the abutting portion away from the pole body, and the second through sub-hole penetrates through a surface of the pole body connected with the abutting portion; and

providing an explosion-proof assembly, wherein the explosion-proof assembly comprises an explosion-proof valve and a protective sheet, the explosion-proof valve and the protective sheet are disposed in the second through hole, the explosion-proof valve is spaced apart from the protective sheet, the explosion-proof valve is disposed in the first through sub-hole, the protective sheet is disposed in the second through sub-hole, the explosion-proof valve is disposed closer to the second surface than the protective sheet, and the explosion-proof valve is configured to seal the second through hole.

8. The method for assembling the battery of claim 7 , further comprising:

providing an electrical connector and a battery body, wherein the battery body comprises the current collector; and

connecting the electrical connector with the pole and the current collector electrically respectively, wherein the electrical connector is inserted into the first through hole.

9. The cover plate assembly of claim 1 , wherein the abutting portion has a first end surface away from the pole body, the pole body has a second end surface away from the abutting portion, and a peripheral side surface, the peripheral side surface is connected between the second end surface and the abutting portion, the first through sub-hole penetrates through the first end surface, and the second through sub-hole penetrates through the peripheral side surface.