Battery and battery pack having the same, and electric vehicle

1. A battery, comprising:

a housing;

a cover plate located at an end of the housing;

a terminal disposed on the cover plate;

a pole core located inside the housing and having a tab, the tab having a bending portion and a mounting portion, a socket being formed between the bending portion and the mounting portion, and the mounting portion being connected to the terminal; and

an insulating spacer covering at least one part of the tab that faces away from the terminal, wherein at least one part of the insulating spacer is located in the socket.

2. The battery according to claim 1 , wherein a surface that is of the terminal and that faces the pole core constitutes a mounting plane, and the mounting portion being parallel to the mounting plane and connected to the mounting plane, and the insulating spacer coveting the mounting portion and an edge of the insulating spacer being located at a junction of the mounting portion and the bending portion.

3. The battery according to claim 2 , wherein the terminal comprises:

a plate-like body disposed on a surface that is of the cover plate and that faces the pole core, a surface that is of the plate-like body and that faces the pole core constituting the mounting plane; and

a columnar body connected to the plate-like body and passing through the cover plate to protrude from a surface that is of the cover plate and that faces away from the pole core.

4. The battery according to claim 3 , wherein

the plate-like body and the columnar body are an integrated piece; or

the plate-like body and the columnar body are separate pieces.

5. The battery according to claim 1 , wherein the insulating spacer is clamped onto the cover plate.

6. The battery according to claim 5 , wherein a surface that is of the cover plate and that faces the insulating spacer is provided with a hook, and a surface that is of the insulating spacer and that faces away from the cover plate is provided with a slot, the hook being hooked in the slot from an edge of the insulating spacer.

7. The battery according to claim 6 , wherein the surface that is of the insulating spacer and that faces away from the cover plate is provided with a reinforcing rib protruding toward the pole core, at least one part of the slot being formed on the reinforcing rib.

8. The battery according to claim 7 , wherein a surface that is of the insulating spacer and that faces the cover plate is provided with a groove recessed into awl inside of the reinforcing rib.

9. The battery according to claim 1 , wherein a surface that is of the insulating spacer and that faces the cover plate is provided with a first support rib and a second support rib, and the first support rib and the second support rib are respectively located on two sides of the tab in a width direction of the tab and both of the first support rib and the second support rib abut against the cover plate.

10. The battery according to claim 1 , wherein a protective adhesive layer is disposed between the insulating spacer and the at least one part of the tab.

11. The battery according to claim 10 , wherein

a width of the protective adhesive layer is less than a width of the terminal, and a length of the protective adhesive layer is less than a length of the terminal and greater than a width of the tab; and

a width of the insulating spacer is less than the width of the terminal, and a length of the insulating spacer is greater than the width of the tab.

12. The battery according to claim 1 , wherein

the cover plate has a first side region and a second side region arranged along a lateral direction of the cover plate, a first part of the terminal being located in the first side region and a second part, of the terminal being located in the second side region;

the battery comprises at least one pair of pole cores, and each pair of pole cores comprises a first pole core corresponding to a position of the first side region and a second pole core corresponding to a position of the second side region, the first pole core having a first tab, at least one part of the first tab extending in a direction from the first side region to the second side region and being connected to at least the first part of the terminal, the second pole core having a second pole tab, and at least one part of the second tab extending in a direction from the second side region to the first side region and being connected to at least the second part of the terminal; and

the insulating spacer covers one side that is of the at least one part of the first tab and that faces away from the terminal and one side that is of the at least one part of the second tab and that faces away from the terminal.

13. The battery according to claim 12 , wherein

the first pole core has a first positive tab and a first negative tab disposed at a first interval along a length direction of the first pole core, the second pole core has a second positive tab and a second negative tab disposed at a second interval along a length direction of the second pole core the terminal is a positive terminal and the battery further comprises a negative terminal, at least one part of the first positive tab and at least one part of the second positive tab being connected to the positive terminal, and at least one part of the first negative tab and at least one part of the second negative tab being connected to the negative terminal; and

the insulating spacer is a positive insulating spacer and the battery further comprises a negative insulating spacer, the positive insulating spacer covering at least one part of the first positive tab that faces away from the positive terminal and at least one part of the second positive tab that faces away from the positive terminal, and the negative insulating spacer covering at least one part of the first negative tab that faces away from the negative terminal and at least one part of the second negative tab that faces away from the negative terminal.

14. The battery according to claim 13 , wherein the positive insulating spacer and the negative insulating spacer are disposed at a third interval or extend toward each other to be connected into one piece.

15. A battery pack, comprising the battery according to claim 1 .

16. An electric vehicle, comprising the battery pack according to claim 15 .