Battery cell, method and apparatus for manufacturing the same, battery, and electric apparatus
The present application relates to a battery cell and a manufacturing method and device thereof, a battery, and a power consumption apparatus, belonging to the field of battery manufacturing technologies. The battery cell includes: a shell with a first wall; an electrode assembly; and a first current collecting member, where the first wall has a first surface facing the first current collecting member, the first current collecting member has a second surface facing the first wall, one of the first surface and the second surface is provided with a protrusion and the other abuts against the protrusion to form a gap between the first wall and the first current collecting member; and the first current collecting member is provided with a first hole and a second hole, and the first hole is configured to be in communication with the second hole through the gap.
1. A battery cell, comprising:
a shell with a first wall;
an electrode assembly disposed inside the shell, wherein the electrode assembly is formed with a center hole, and a first tab is provided on a side of the electrode assembly facing the first wall; and
a first current collecting member disposed between the first wall and the electrode assembly and configured for electrically connecting the first tab and the first wall,
wherein
the first wall has a first surface facing the first current collecting member, the first current collecting member has a second surface facing the first wall, one of the first surface of the first wall and the second surface of the first current collecting member is provided with a protrusion, and the other abuts against the protrusion to form a gap between the first wall and the first current collecting member; and
the first current collecting member is formed with a first hole and a second hole, the first hole is opposite to the center hole of the electrode assembly, the second hole is opposite to the first tab, and the first hole is configured to be in communication with the second hole through the gap.
2. The battery cell according to claim 1 , wherein a plurality of protrusions are spaced around the center hole of the electrode assembly.
3. The battery cell according to claim 1 , wherein a plurality of second holes are spaced around the center hole of the electrode assembly.
4. The battery cell according to claim 1 , wherein a projection of the protrusion on the first current collecting member does not overlap with the second hole.
5. The battery cell according to claim 1 , wherein the first wall is formed with a third hole, the first current collecting member comprises a center portion and a surrounding portion, the surrounding portion surrounds the center portion, the center portion protrudes from the surrounding portion in a direction away from the electrode assembly, at least a portion of the center portion is inserted into the third hole, and the center portion is connected to a wall of the third hole.
6. The battery cell according to claim 5 , wherein the center portion comprises a top wall and a side wall, the side wall is disposed on a periphery of the top wall, the side wall connects the surrounding portion and the top wall, the first hole is disposed on the side wall and in communication with the gap, and a peripheral surface of the side wall is connected to the wall of the third hole.
7. The battery cell according to claim 5 , wherein a ratio of a diameter of the center portion to a diameter of the first current collecting member is greater than or equal to 0.3.
8. The battery cell according to claim 1 , wherein the shell further comprises a second wall opposite to the first wall, a second tab is disposed on a side of the electrode assembly facing the second wall, and the battery cell further comprises:
an electrode terminal, which is insulated on the second wall and electrically connected to the second tab.
9. The battery cell according to claim 8 , wherein the battery cell further comprises:
a second current collecting member, which is disposed between the electrode assembly and the second wall and configured for connecting the second tab and the electrode terminal.
10. The battery cell according to claim 8 , wherein the electrode terminal is formed with a liquid injection hole, which is opposite to the center hole.
11. The battery cell according to claim 10 , wherein the battery cell further comprises:
a sealing member for sealing the liquid injection hole.
12. The battery cell according to claim 1 , wherein the battery cell further comprises:
a pressure relief portion disposed on the first wall, wherein the pressure relief portion is configured to activate when the temperature or pressure inside the battery cell reaches a threshold, so as to release the pressure inside the battery cell.
13. The battery cell according to claim 1 , wherein the shell comprises a shell body and an end cover, the shell body has an opening, and the end cover is configured to close the opening, wherein the first wall is the end cover.
14. A battery, comprising the battery cell according to claim 1 .
15. A power consumption apparatus, comprising the battery according to claim 14 .