Battery with improved safety
A battery proofed against short circuiting, for better safety, includes a battery cell and a first set of electrode tabs. The battery cell includes a first electrode plate and a second electrode plate. The first set of electrode tabs is electrically connected to the first electrode plate. The first set of electrode tabs includes a first bending portion, an edge of the second electrode plate defines a first receiving groove, and the first receiving groove corresponds to the first bending portion.
1. A battery comprising:
a battery cell comprising a first electrode plate and a second electrode plate; and
a first set of electrode tabs electrically connected to the first electrode plate, the first set of electrode tabs comprising a first bending portion, an edge of the second electrode plate defining a first receiving groove, and the first receiving groove corresponding to the first bending portion,
wherein the first electrode plate defines a second receiving groove, and the second receiving groove corresponds to the first bending portion, and
wherein the first electrode plate and the second electrode plate are wound to form the battery cell, and the battery cell comprises a first cell portion and a second cell portion facing the first cell portion, the first set of electrode tabs is disposed at the first cell portion, and the first receiving groove and the second receiving groove face each other, and are disposed at the second cell portion.
2. The battery of claim 1 , wherein the first set of electrode tabs comprises a plurality of first electrode tabs and at least one second electrode tab, the plurality of first electrode tabs overlap each other in the battery cell, a width of the second electrode tab is greater than a width of each of the plurality of first electrode tabs, and the second electrode tab is disposed at an inner side and/or an outer side of the battery cell.
3. The battery of claim 2 , wherein a connecting area is disposed between the second electrode tab and the first electrode plate, and a polygonal transition is provided at a junction of the connecting area and the first electrode plate.
4. The battery of claim 2 , wherein the plurality of first electrode tabs and the second electrode tab are integrally formed with the first electrode plate.
5. The battery of claim 1 , wherein the battery cell further comprises an isolation film disposed between the first electrode plate and the second electrode plate, and the isolation film comprises a blocking area, and the blocking area is disposed at an edge of the isolation film, and corresponds to the first receiving groove and the second receiving groove.
6. The battery of claim 1 , wherein a width of each of the first receiving groove and the second receiving groove is greater than a maximum width of the first bending portion.
7. The battery of claim 1 , wherein a depth of each of the first receiving groove and the second receiving groove is greater than a total length of the first bending portion.
8. The battery of claim 1 , further comprising a second set of electrode tabs electrically connected to the second electrode plate, wherein the second set of electrode tabs comprises a second bending portion, and the first electrode plate further defines a third receiving groove, and the third receiving groove corresponds to the second bending portion.
9. The battery of claim 8 , wherein the second electrode plate further defines a fourth receiving groove, and the fourth receiving groove corresponds to the second bending portion.
10. The battery of claim 9 , wherein the second electrode plate further defines a fifth receiving groove, and the first electrode plate further defines a sixth receiving groove, and the fifth receiving groove and the sixth receiving groove correspond to the first bending portion.
11. The battery of claim 10 , wherein the first electrode plate further defines a seventh receiving groove, and the second electrode plate further defines an eighth receiving groove, and the seventh receiving groove and the eighth receiving groove correspond to the second bending portion.
12. The battery of claim 8 , wherein the second set of electrode tabs comprises a plurality of first electrode tabs and at least one second electrode tab, the plurality of first electrode tabs overlap each other in the battery cell, a width of the second electrode tab is greater than a width of each of the plurality of first electrode tabs, and the second electrode tab is disposed at an inner side and/or an outer side of the battery cell.
13. The battery of claim 12 , wherein a connecting area is disposed between the second electrode tab and the first electrode plate, and a polygonal transition is provided at a junction of the connecting area and the first electrode plate.
14. The battery of claim 8 , wherein the plurality of first electrode tabs and second electrode tab are integrally formed with the second electrode plate.
15. The battery of claim 8 , wherein the second bending portion is U-shaped.
16. The battery of claim 1 , wherein a depth of each of the first receiving groove and the second receiving groove is greater than a total length of the first bending portion.
17. The battery of claim 1 , wherein an arc is provided at each corner of the first receiving groove and the second receiving groove.
18. The battery of claim 1 , wherein the first bending is U-shaped.