CYLINDRICAL ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, ELECTRICAL DEVICE AND MANUFACTURING METHOD
A cylindrical electrode assembly of a coiled structure includes a main body and a first tab. The main body is provided with a first end face, and the first tab extends out of the first end face and is bent toward the first end face.
1 . A cylindrical electrode assembly, wherein:
the cylindrical electrode assembly is of a coiled structure and comprises a main body and a first tab, the main body is provided with a first end face, and the first tab extends out of the first end face and is bent toward the first end face.
2 . The cylindrical electrode assembly according to claim 1 , wherein:
the first tab comprises a first flat part and a second flat part, the first flat part extends out of the first end face, and the first flat part and the second flat part are bent toward each other.
3 . The cylindrical electrode assembly according to claim 1 , wherein:
the first tab comprises a bent part located at a root part of the first tab.
4 . The cylindrical electrode assembly according to claim 1 , wherein:
the first tab is bent toward the first end face through one turn.
5 . The cylindrical electrode assembly according to claim 1 , wherein:
the first tab is one of a plurality of first tabs of the cylindrical electrode assembly.
6 . The cylindrical electrode assembly according to claim 5 , wherein:
the plurality of first tabs do not overlap with each other before being bent.
7 . The cylindrical electrode assembly according to claim 1 , wherein:
the first tab is bent toward a coiled center line of the cylindrical electrode assembly.
8 . The cylindrical electrode assembly according to claim 1 , comprising:
an electrode plate, wherein the electrode plate comprises a current collector and an active material layer, the active material layer is coated on a surface of the current collector, and the first tab is die-cut from an area that is of the current collector and that is not coated with the active material layer.
9 . The cylindrical electrode assembly according to claim 8 , wherein:
the current collector is a composite current collector.
10 . The cylindrical electrode assembly according to claim 1 , wherein:
the main body is provided with a second end face, and the second end face is disposed opposite to the first end face in a direction of the coiled center line of the cylindrical electrode assembly; and
the cylindrical electrode assembly further comprises a second tab, and the second tab extends from the second end face and is bent toward the second end face.
11 . The cylindrical electrode assembly according to claim 10 , wherein:
the second tab comprises a first flat part and a second flat part, the first flat part extends out of the second end face, and the first flat part and the second flat part are bent toward each other.
12 . The cylindrical electrode assembly according to claim 10 , wherein:
the second tab comprises a bent part located at a root part of the second tab.
13 . The cylindrical electrode assembly according to claim 10 , wherein:
the second tab is bent toward the second end face through one turn.
14 . The cylindrical electrode assembly according to claim 10 , wherein:
the second tab is one of a plurality of second tabs of the cylindrical electrode assembly.
15 . The cylindrical electrode assembly according to claim 14 , wherein:
the plurality of second tabs do not overlap with each other before being bent.
16 . The cylindrical electrode assembly according to claim 10 , wherein:
the second tab is bent toward a coiled center line of the cylindrical electrode assembly.
17 . The cylindrical electrode assembly according to claim 10 , comprising:
an electrode plate, wherein the second electrode plate comprises a current collector and an active material layer, the active material layer is coated on a surface of the current collector, and the second tab is die-cut from an area that is of the current collector and that is not coated with the active material layer.
18 . The cylindrical electrode assembly according to claim 17 , wherein
the current collector is a composite current collector.
19 . A cylindrical battery cell, comprising:
a housing assembly comprising a first electrode lead-out part configured to input or output electric energy; and
the cylindrical electrode assembly according to claim 1 , wherein the first tab is electrically connected to the first electrode lead-out part.
20 . A manufacturing method for a cylindrical battery cell, comprising:
providing a housing assembly, wherein the housing assembly comprises a first electrode lead-out part configured to input or output electric energy;
providing a cylindrical electrode assembly, wherein the cylindrical electrode assembly is of a coiled structure and comprises a main body and a first tab, the main body is provided with a first end face, and the first tab extends from the first end face;
bending the first tab toward the first end face; and
electrically connecting the bent first tab to the first electrode lead-out part.