Battery cell, battery, and electric apparatus
View Patent ↗A battery cell includes an electrode assembly including a first tab and a second tab located on two ends of the electrode assembly, respectively, in a first direction. The battery cell further includes a first electrode terminal and a second electrode terminal located on two sides of the electrode assembly, respectively, in the first direction, a first adapter configured to couple the first tab and the first electrode terminal, and a second adapter configured to couple the second tab and the second electrode terminal. The first adapter and the second adapter each comprise at least two non-bending portions and at least one bending portion each connecting two adjacent ones of the at least two non-bending portions. A number of the at least two non-bending portions of the second adapter is greater than a number of the at least two non-bending portions of the first adapter.
1 . A battery cell, comprising:
an electrode assembly, comprising a first tab and a second tab located on two ends of the electrode assembly, respectively, in a first direction;
a first electrode terminal and a second electrode terminal located on two sides of the electrode assembly, respectively, in the first direction;
a first adapter configured to couple the first tab and the first electrode terminal; and
a second adapter configured to couple the second tab and the second electrode terminal;
wherein:
the first adapter and the second adapter each comprise at least two non-bending portions and at least one bending portion each connecting two adjacent ones of the at least two non-bending portions, all the at least two non-bending portions of the first adapter are stacked in the first direction, and all the at least two non-bending portions of the second adapter are stacked in the first direction; and
a number of the at least two non-bending portions of the second adapter is greater than a number of the at least two non-bending portions of the first adapter.
2 . The battery cell according to claim 1 , wherein:
the at least two non-bending portions of the first adapter comprise:
a first non-bending portion coupled to the first electrode terminal; and
a second non-bending portion coupled to the first tab; and
the at least two non-bending portions of the second adapter comprise:
a third non-bending portion coupled to the second electrode terminal;
a fourth non-bending portion coupled to the second tab; and
a fifth non-bending portion provided between the third non-bending portion and the fourth non-bending portion.
3 . The battery cell according to claim 2 , wherein:
the first non-bending portion is welded to the first electrode terminal, and the second non-bending portion is welded to the first tab; and
the third non-bending portion is welded to the second electrode terminal, and the fourth non-bending portion is welded to the second tab.
4 . The battery cell according to claim 2 , wherein each of the second non-bending portion and the fourth non-bending portion is provided with a through hole.
5 . The battery cell according to claim 1 , wherein the first electrode terminal runs through and is coupled to one non-bending portion of the at least two non-bending portions of the first adapter.
6 . The battery cell according to claim 5 , wherein:
the first electrode terminal comprises a terminal body, a platform portion, and a protruding portion;
the terminal body is coupled to the platform portion and the protruding portion;
the protruding portion runs through and is coupled to the one non-bending portion of the first adapter; and
the platform portion abuts against a side of the one non-bending portion of the first adapter facing away from the first tab.
7 . The battery cell according to claim 1 , wherein the second electrode terminal runs through and is coupled to one non-bending portion of the at least two non-bending portions of the second adapter.
8 . The battery cell according to claim 7 , wherein:
the one non-bending portion of the second adapter is provided with a through hole;
the second electrode terminal comprises a terminal body and a protruding portion;
the terminal body is coupled to the protruding portion; and
the protruding portion is provided in the through hole and seam-welded to the second adapter.
9 . The battery cell according to claim 1 , wherein a resistivity of the second adapter is smaller than a resistivity of the first adapter.
10 . The battery cell according to claim 9 , wherein the first adapter is made of aluminum, and the second adapter is made of copper.
11 . The battery cell according to claim 1 , wherein a length of the second adapter is greater than a length of the first adapter.
12 . The battery cell according to claim 1 , wherein in each of the first adapter and the second adapter, a minimum thickness of each of the at least one bending portion is smaller than a minimum thickness of each of the at least two non-bending portions.
13 . The battery cell according to claim 1 , wherein each of the at least one bending portion of the first adapter or the second adapter comprises a transition section coupled to a corresponding non-bending portion of the at least two non-bending portions, and a thickness of the transition section decreases in a direction leaving the corresponding non-bending portion coupled to the transition section.
14 . A battery, comprising a battery cell comprising:
an electrode assembly, comprising a first tab and a second tab located on two ends of the electrode assembly, respectively, in a first direction;
a first electrode terminal and a second electrode terminal located on two sides of the electrode assembly, respectively, in the first direction;
a first adapter configured to couple the first tab and the first electrode terminal; and
a second adapter configured to couple the second tab and the second electrode terminal;
wherein:
the first adapter and the second adapter each comprise at least two non-bending portions and at least one bending portion each connecting two adjacent ones of the at least two non-bending portions, all the at least two non-bending portions of the first adapter are stacked in the first direction, and all the at least two non-bending portions of the second adapter are stacked in the first direction; and
a number of the at least two non-bending portions of the second adapter is greater than a number of the at least two non-bending portions of the first adapter.
15 . The battery according to claim 14 , wherein:
the at least two non-bending portions of the first adapter comprise:
a first non-bending portion coupled to the first electrode terminal; and
a second non-bending portion coupled to the first tab; and
the at least two non-bending portions of the second adapter comprise:
a third non-bending portion coupled to the second electrode terminal;
a fourth non-bending portion coupled to the second tab; and
a fifth non-bending portion provided between the third non-bending portion and the fourth non-bending portion.
16 . The battery according to claim 14 , wherein each of the second non-bending portion and the fourth non-bending portion is provided with a through hole.
17 . The battery according to claim 14 , wherein the first electrode terminal runs through and is coupled to one non-bending portion of the at least two non-bending portions of the first adapter.
18 . The battery according to claim 17 , wherein:
the first electrode terminal comprises a terminal body, a platform portion, and a protruding portion;
the terminal body is coupled to the platform portion and the protruding portion;
the protruding portion runs through and is coupled to the one non-bending portion of the first adapter; and
the platform portion abuts against a side of the one non-bending portion of the first adapter facing away from the first tab.
19 . An electric apparatus, comprising the battery cell according to claim 1 and configured to supply electric energy.
20 . A battery cell, comprising:
an electrode assembly, comprising a first tab and a second tab located on two ends of the electrode assembly, respectively, in a first direction;
a first electrode terminal and a second electrode terminal located on two sides of the electrode assembly, respectively, in the first direction;
a first adapter configured to couple the first tab and the first electrode terminal, the first adapter being directly connected to the first electrode terminal; and
a second adapter configured to couple the second tab and the second electrode terminal, the second adapter being directly connected to the second electrode terminal;
wherein:
the first adapter and the second adapter each comprise at least two non-bending portions and at least one bending portion each connecting two adjacent ones of the at least two non-bending portions; and
a number of the at least two non-bending portions of the second adapter is greater than a number of the at least two non-bending portions of the first adapter.