Lower plastic member, end cover assembly, energy storage apparatus, and power consuming device

An end cover assembly comprising:

• an upper cover and a lower plastic member, wherein the lower plastic member comprises:
• a body, having a first surface and a second surface positioned facing away from the first surface, wherein the first surface of the lower plastic member is positioned facing towards the upper cover;
• a suction portion, disposed on the first surface, wherein the suction portion comprises a plurality of first ribs and a plurality of second ribs, the plurality of first ribs are parallel to and spaced apart from one another, the plurality of second ribs are parallel to and spaced apart from one another, the plurality of first ribs and the plurality of second ribs are disposed in a crisscross pattern, the plurality of first ribs and the plurality of second ribs cooperatively define a plurality of recesses, and each of the plurality of recesses is recessed from the first surface towards the second surface;
• and
• an explosion-proof boss, wherein the explosion-proof boss is disposed at a middle part of the body in a length direction of the body, the explosion-proof boss is recessed relative to the first surface and protrudes relative to the second surface;
• wherein the explosion-proof boss is aligned with an explosion-proof valve disposed on the upper cover;
• wherein a midline extending in a width direction of the first surface is corresponding to the explosion-proof boss, and there is a spacing distance between the suction portion and the explosion-proof boss;
• wherein an end surface of the plurality of first ribs positioned facing towards the upper cover is flush with the first surface, and an end surface of the plurality of second ribs positioned facing towards the upper cover is flush with the first surface;
• wherein an orthographic projection of the suction portion on the first surface is circular and has a diameter ranging from 5 mm to 10 mm;
• an orthographic projection of each of the plurality of recesses on the first surface is rectangular, and has a length ranging from 0.3 mm to 0.6 mm and a width ranging from 0.3 mm to 0.6 mm;
• and a depth of each of the plurality of recesses recessed from the first surface ranges from 0.2 mm to 0.3 mm;
• and
• wherein the suction portion is implemented as a plurality of suction portions, and the plurality of suction portions are symmetrical about the midline extending in the width direction of the first surface.

A power consuming device comprising:

• a power consuming apparatus and an energy storage apparatus, wherein the energy storage apparatus is configured to supply power to the power consuming apparatus, and the energy storage apparatus comprises a housing, a cell assembly, and an end cover assembly, wherein the cell assembly is disposed in the housing, and the end cover assembly is connected to the housing;
• and the end cover assembly comprises an upper cover and a lower plastic member, wherein the lower plastic member comprises:
• a body, having a first surface and a second surface positioned facing away from the first surface, wherein the first surface of the lower plastic member is positioned facing towards the upper cover;
• a suction portion, disposed on the first surface, wherein the suction portion comprises a plurality of first ribs and a plurality of second ribs, the plurality of first ribs are parallel to and spaced apart from one another, the plurality of second ribs are parallel to and spaced apart from one another, the plurality of first ribs and the plurality of second ribs are disposed in a crisscross pattern, the plurality of first ribs and the plurality of second ribs cooperatively define a plurality of recesses, and each of the plurality of recesses is recessed from the first surface towards the second surface;
• and
• an explosion-proof boss, wherein the explosion-proof boss is disposed at a middle part of the body in a length direction of the body, the explosion-proof boss is recessed relative to the first surface and protrudes relative to the second surface;
• wherein the explosion-proof boss is aligned with an explosion-proof valve disposed on the upper cover;
• wherein a midline extending in a width direction of the first surface is corresponding to the explosion-proof boss, and there is a spacing distance between the suction portion and the explosion-proof boss;
• wherein an end surface of the plurality of first ribs positioned facing towards the upper cover is flush with the first surface, and an end surface of the plurality of second ribs positioned facing towards the upper cover is flush with the first surface;
• wherein an orthographic projection of the suction portion on the first surface is circular and has a diameter ranging from 5 mm to 10 mm;
• an orthographic projection of each of the plurality of recesses on the first surface is rectangular, and has a length ranging from 0.3 mm to 0.6 mm and a width ranging from 0.3 mm to 0.6 mm;
• and a depth of each of the plurality of recesses recessed from the first surface ranges from 0.2 mm to 0.3 mm;
• and
• wherein the suction portion is implemented as a plurality of suction portions, and the plurality of suction portions are symmetrical about the midline extending in the width direction of the first surface.