Connection member and rechargeable battery

1. A rechargeable battery, comprising:

a battery core; and

a connection member comprising:

a guide plate; and

a first connecting plate integrally formed on the guide plate and connected to a tab of the battery core, wherein the first connecting plate is disposed in a bendable manner relative to the guide plate, and at least one indentation is present between the first connecting plate and the guide plate;

wherein:

the tab extends from a side of a core body of the battery core in a width direction; and

at least a portion of the guide plate protrudes, relative to the first connecting plate, towards the core body of the battery core to form a protrusion, and the protrusion abuts against the battery core.

2. The rechargeable battery according to claim 1 , wherein the connection member comprises the at least one indentation provided on a side, of the connection member, to which pressure is applied when the first connecting plate is bent relative to the guide plate.

3. The rechargeable battery according to claim 2 , wherein all the indentations of the connection member are provided on the side, of the connection member, to which pressure is applied when the first connecting plate is bent relative to the guide plate.

4. The rechargeable battery according to claim 3 , wherein the guide plate comprises a main plate body and a flanged portion, wherein the flanged portion is arranged at a side edge of the main plate body in a width direction, the first connecting plate is connected to the guide plate through the flanged portion, and a distance between the at least one indentation and the main plate body is 1 to 3 times a thickness of the main plate body.

5. The rechargeable battery according to claim 3 , wherein a depth of the at least one indentation is ¼ to ⅓ of a minimum plate thickness at a position of the at least one indentation when the at least one indentation is not provided.

6. The rechargeable battery according to claim 2 , wherein the guide plate comprises a main plate body and a flanged portion, wherein the flanged portion is arranged at a side edge of the main plate body in a width direction, the first connecting plate is connected to the guide plate through the flanged portion, and a distance between the at least one indentation and the main plate body is 1 to 3 times a thickness of the main plate body.

7. The rechargeable battery according to claim 2 , wherein an opening of the at least one indentation is larger than a bottom of the at least one indentation before the first connecting plate is bent relative to the guide plate.

8. The rechargeable battery according to claim 2 , wherein a depth of the at least one indentation is ¼ to ⅓ of a minimum plate thickness at a position of the at least one indentation when the at least one indentation is not provided.

9. The rechargeable battery according to claim 1 , wherein the guide plate comprises a main plate body and a flanged portion, wherein the flanged portion is arranged at a side edge of the main plate body in a width direction, the first connecting plate is connected to the guide plate through the flanged portion, and a distance between the at least one indentation and the main plate body is 1 to 3 times a thickness of the main plate body.

10. The rechargeable battery according to claim 1 , wherein a cross-section shape of the at least one indentation is one of a curve, a polygonal line and a combination of a curve and a straight line.

11. The rechargeable battery according to claim 1 , wherein an opening of the at least one indentation is larger than a bottom of the at least one indentation before the first connecting plate is bent relative to the guide plate.

12. The rechargeable battery according to claim 1 , wherein a depth of the at least one indentation is ¼ to ⅓ of a minimum plate thickness at a position of the at least one indentation when the at least one indentation is not provided.

13. The rechargeable battery according to claim 1 , wherein the at least one indentation is provided continuously along a full or partial length of a bending position between the first connecting plate and the guide plate; or the at least one indentation comprises a plurality of indentation segments provided intermittently along the full or partial length of the bending position between the first connecting plate and the guide plate.

14. The rechargeable battery according to claim 1 , wherein ends of a bending position between the first connecting plate and the guide plate comprise a first root and a second root that are respectively arranged at opposite ends of the bending position, the connection member comprises a first groove arranged at the first root and disposed on the first connecting plate and the guide plate, and the first groove is recessed downward from an upper edge of the bending position.

15. The rechargeable battery according to claim 14 , wherein the connection member further comprises a second groove arranged at the second root and disposed on the first connecting plate and the guide plate, and the second groove is recessed upward from a lower edge of the bending position.

16. The rechargeable battery according to claim 1 , wherein a thickness of the first connecting plate is set to be smaller than a thickness of the guide plate.

17. The rechargeable battery according to claim 1 , wherein a portion, of the guide plate, connected to the first connecting plate becomes gradually thinner in a direction from the guide plate to the first connecting plate.

18. The rechargeable battery according to claim 1 , wherein the rechargeable battery further comprises a gasket that is fastened to the first connecting plate and the tab, and the tab is sandwiched between the first connecting plate and the gasket.

19. The rechargeable battery according to claim 1 , wherein the guide plate extends along the width direction, and the first connecting plate extends to an outer side of the guide plate along the width direction.