JPWO2021203599A5 - - Google Patents

Claims (15)

a case for providing a cavity;
an end cover configured to close the opening of the case;
an electrode assembly disposed within the cavity of the case;
electrode terminals disposed on the end cover;
a connection member having a first connection portion electrically connected to the electrode assembly and a second connection portion electrically connected to the electrode terminal ;
The first connecting portion is in a state of being folded along the crease with respect to the second connecting portion,
The fold is arranged between a first end face and a second end face of the first connecting portion,
When the connecting member is in an unfolded, unfolded state, the second end surface and the first end surface are arranged to face each other along the length direction ,
the second end surface is further away from the second connecting portion than the first end surface;
A first notch is arranged on a side of the first connection portion adjacent to the second connection portion,
The fold extends to the first notch,
The first notch extends along a direction intersecting the length direction and along a direction from the first end face to the second end face,
The first notch is inclined toward an intermediate portion in the width direction of the connection member so that the width of the fold is reduced.
battery. The first notch has an arc-shaped notch portion with an arc-shaped contour,
A battery according to claim 1 . The first connecting portion has a protruding portion that protrudes from the second connecting portion along the width direction of the connecting member,
The battery according to claim 1 or 2 . The first connecting portion is
two protruding portions that respectively protrude to one of both sides of the second connecting portion along the width direction of the connecting member;
a third notch disposed between the second end surfaces of the two protruding portions;
including
The third notch is concave along the direction from the second end face to the first end face,
A battery according to claim 3. The connection member is connected to the electrode assembly and protrudes from the crease along a direction from the first connection portion to the second connection portion when the connection member is in the deployed state. having a part
The battery according to any one of claims 1-4 . The projection of the connection member does not overlap the projection of the injection hole along the axial direction of the injection hole configured to allow injection of the electrolytic solution,
The battery according to any one of claims 1-5 . The first connection part is folded along the crease with respect to the second connection part so that the projection of the connection member does not overlap the projection of the injection hole along the axial direction of the injection hole,
A battery according to claim 6 . the protrusion of the connecting member does not overlap the protrusion of the hole plug along the axial direction of the injection hole;
the hole plug extends into the injection hole and protrudes from a side of the injection hole adjacent the electrode assembly;
The battery according to claim 6 or 7 . further comprising a protective member configured to prevent the hole plug from contacting the connecting member;
A battery according to claim 8 . further comprising a first insulating member disposed on an end cover side of the battery adjacent to the electrode assembly;
the first insulating member has an insulating body and a limit ring;
the limit ring protrudes from the insulating body toward the electrode assembly and is disposed on the outer edge of the connection member so as to prevent the connection member from contacting the case of the battery;
The battery according to any one of claims 1-9 . the limit ring is positioned on the outer edge of the end of the tab of the electrode assembly adjacent the end cover;
11. Battery according to claim 10 . the first insulating member has a support portion disposed on the insulating body;
The support portion protrudes from the insulating body toward the direction in which the electrode assembly is located, and is supported between the insulating body and the first connecting portion.
A battery according to claim 10 or claim 11 . The insulating body is provided in a weight reduction groove,
The weight reduction groove is recessed from an end surface of the insulating body away from the electrode assembly toward a direction in which the electrode assembly is located.
The battery according to any one of claims 10-12 . Equipped with the battery according to any one of claims 1 to 13 ,
battery module. comprising a battery module according to claim 14 configured to supply electrical energy;
electrical equipment.