PRESSURE RELIEF COMPONENT, BATTERY CELL, BATTERY, AND ELECTRICAL DEVICE
Provided are a pressure relief component, a battery cell, a battery, and an electrical device. The pressure relief component is configured for a battery cell. The pressure relief component includes a nick groove. At least two protrusions are arranged within the region enclosed by the nick groove, wherein the protrusions protrude from one side of the pressure relief component in a thickness direction, and the protrusions are recessed on the other side of the pressure relief component in the thickness direction.
1 . A pressure relief component configured for a battery cell, wherein the pressure relief component comprises:
a nick groove, wherein
a region enclosed by the nick groove comprises at least two protrusions that protrude from a side of the pressure relief component in a thickness direction; and
the at least two protrusions are recessed on another side of the pressure relief component in the thickness direction.
2 . The pressure relief component according to claim 1 , wherein the nick groove is in a circular shape.
3 . The pressure relief component according to claim 1 , wherein a portion of the nick groove is arranged along an edge of one of the at least two protrusions.
4 . The pressure relief component according to claim 3 , wherein
the nick groove comprises:
a first straight groove segment;
a second straight groove segment;
a first arc groove segment; and
a second arc groove segment;
the first arc groove segment and the second arc groove segment are respectively arranged along edges of the at least two protrusions;
the first straight groove segment connects a first end of the first arc groove segment and a first end of the second arc groove segment; and
the second straight groove segment connects a second end of the first arc groove segment and a second end of the second arc groove segment.
5 . The pressure relief component according to claim 1 , wherein
the pressure relief component comprises a first surface and a second surface that are oppositely arranged along the thickness direction;
the first surface comprises a recessed groove;
the nick groove is arranged at a groove bottom wall of the recessed groove; and
a portion of the groove bottom wall comprises the at least two protrusions.
6 . The pressure relief component according to claim 5 , wherein
the groove bottom wall comprises a third surface facing an opening of the recessed groove; and
the protrusion protrudes from the third surface.
7 . The pressure relief component according to claim 6 , wherein
a height of the protrusion protruding from the third surface is H1; and
a thickness of the nick groove arranged at the groove bottom wall is H2 that satisfies a condition: 1≤H1/H2≤10.
8 . The pressure relief component according to claim 7 , wherein 3≤H1/H2≤5.
9 . The pressure relief component according to claim 5 , wherein the protrusion protrudes from the first surface.
10 . The pressure relief component according to claim 1 , wherein the at least two protrusions are arranged in a symmetrical manner about a geometric center of the region enclosed by the nick groove.
11 . The pressure relief component according to claim 1 , wherein the protrusions are formed by stamping.
12 . A battery cell, comprising:
a pressure relief component that comprises a nick groove, wherein
a region enclosed by the nick groove comprises at least two protrusions that protrude from a side of the pressure relief component in a thickness direction; and
the at least two protrusions are recessed on another side of the pressure relief component in the thickness direction.
13 . The battery cell according to claim 12 , wherein
the battery cell comprises a shell and an end cover;
the shell comprises an opening;
the end cover closes the opening;
the end cover comprises a through hole; and
the pressure relief component seals the through hole.
14 . The battery cell according to claim 12 , wherein
the battery cell comprises a shell and an end cover;
the shell comprises an opening;
the end cover closes the opening; and
the pressure relief component is the end cover.
15 . The battery cell according to claim 12 , wherein
the battery cell comprises a shell and an end cover;
the shell comprises an opening;
the end cover closes the opening; and
the pressure relief component is the shell.
16 . A battery, comprising a battery cell, the battery cell comprising:
a pressure relief component that comprises a nick groove, wherein a region enclosed by the nick groove comprises at least two protrusions that
protrude from a side of the pressure relief component in a thickness direction; and
the at least two protrusions are recessed on another side of the pressure relief component in the thickness direction.
17 . An electrical device, comprising the battery according to claim 16 , wherein the battery is configured to provide electrical energy.
18 . The electrical device according to claim 17 , wherein the nick groove is in a circular shape.
19 . The electrical device according to claim 17 , wherein
the nick groove comprises:
a first straight groove segment;
a second straight groove segment;
a first arc groove segment; and
a second arc groove segment;
the first arc groove segment and the second arc groove segment are respectively arranged along edges of the at least two protrusions;
the first straight groove segment connects a first end of the first arc groove segment and a first end of the second arc groove segment; and
the second straight groove segment connects a second end of the first arc groove segment and a second end of the second arc groove segment.