CN-224232756-U - Top cap subassembly, energy memory and consumer

CN224232756UCN 224232756 UCN224232756 UCN 224232756UCN-224232756-U

Abstract

The application provides a top cover assembly, an energy storage device and electric equipment. The top cover component comprises a top cover, lower plastic and a pole. The top cover comprises a first side and a second side which are opposite in the thickness direction, and is provided with a first through hole penetrating through the first side and the second side. The lower plastic is arranged on the second side of the top cover and comprises a first side and a second side which are opposite in the thickness direction, the first side of the lower plastic is opposite to the second side of the top cover, the second side of the lower plastic is provided with a mounting groove, and the lower plastic is further provided with a second through hole which penetrates through. The pole comprises a pole body and a welding ring, wherein the pole body is penetrated through with a first through hole and a second through hole and comprises a first end and a second end which are opposite, the first end of the pole body protrudes relative to the first side of the top cover, the second end of the pole body protrudes relative to the bottom surface of the mounting groove, the welding ring is fixed on the outer peripheral wall of the second end of the pole body and is spaced from the inner peripheral wall of the mounting groove, and the minimum distance between the welding ring and the inner peripheral wall of the mounting groove is greater than or equal to 1mm and less than or equal to 11mm.

Inventors

FU YUNFENG
JIN DONGMING
GAO YINGHAO
Xiao Hepan

Assignees

厦门海辰储能科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250507

Claims (10)

1. A header assembly, comprising: The top cover comprises a first side and a second side which are opposite in the thickness direction, and is provided with a first through hole, wherein the first through hole penetrates through the first side of the top cover and the second side of the top cover; A lower plastic disposed on the second side of the top cover and including a first side and a second side opposite to each other in the thickness direction, wherein the first side of the lower plastic is opposite to the second side of the top cover, the second side of the lower plastic is provided with a mounting groove, the lower plastic is further provided with a second through hole penetrating the bottom surface of the mounting groove and the first side of the lower plastic, and The pole comprises a pole body and a welding ring, wherein the pole body penetrates through the first through hole and the second through hole and comprises a first end and a second end which are opposite to each other, the first end of the pole body protrudes from the first side of the top cover, the second end of the pole body protrudes from the bottom surface of the mounting groove, the welding ring is welded to the outer peripheral wall of the second end of the pole body and is spaced from the inner peripheral wall of the mounting groove, and the minimum distance between the welding ring and the inner peripheral wall of the mounting groove is greater than or equal to 1mm and less than or equal to 11mm.
2. The header assembly of claim 1, wherein the inner peripheral wall of the mounting groove is provided with a plurality of ribs projecting from the inner peripheral wall of the mounting groove toward the center of the mounting groove, the plurality of ribs being configured to contact the weld ring to define the position of the weld ring in the mounting groove.
3. The header assembly of claim 2, wherein the height of contact of the bead with the weld ring in the thickness direction of the lower plastic is at least 1/3 the thickness of the weld ring and the bead does not protrude beyond the mounting groove.
4. The header assembly of claim 2, wherein the bead includes a stop surface facing away from an inner peripheral wall of the mounting groove and toward a center of the mounting groove, the weld ring including an outer side surface; The outer side surface is configured as a flat surface, the limit surface is configured as a flat surface so that the limit surface is in contact with the outer side surface, or, At least one of the outer side surface and the limiting surface is configured as a curved surface, and the limiting surface is brought into contact with the outer side surface line.
5. The header assembly of claim 2, wherein the ribs have a hardness less than the hardness of the lower plastic.
6. The top cover assembly according to claim 2, wherein a plurality of said ribs are provided around the axis of said pole body, and the periphery of said weld ring corresponds to at least one of said ribs, respectively; In the case that each side of the periphery of the welding ring corresponds to one of the ribs, the plurality of ribs are uniformly distributed around the center of the mounting groove, or, And under the condition that each side in the periphery of the welding ring corresponds to at least two convex ribs, at least two convex ribs on each side form a group, and a plurality of groups of convex ribs are uniformly distributed around the center of the mounting groove.
7. The roof assembly of claim 2, wherein a free end of the bead distal from the bottom surface of the mounting groove includes a guide surface, the guide surface being progressively greater in distance from the inner peripheral wall in a direction from the second side of the lower plastic to the bottom surface of the mounting groove in a length direction of the roof.
8. The cap assembly of claim 1, wherein the first end of the pole body is provided with a tab, the cap assembly further comprising: The upper plastic is sleeved on the pole body and comprises a first sub-part and a second sub-part which are connected, the first sub-part is arranged on the first side of the top cover, at least part of the first sub-part is clamped between the top cover and the convex block in the thickness direction of the top cover, the second sub-part penetrates through the first through hole and the second through hole and forms a containing cavity with the second through hole, and the upper plastic is sleeved on the pole body and comprises a first sub-part and a second sub-part which are connected, wherein the first sub-part is arranged on the first side of the top cover and at least part of the first sub-part is clamped between the top cover and the convex block in the thickness direction of the top cover and the second sub-part penetrates through the first through hole and the second through hole to form a containing cavity with the second through hole And the sealing piece surrounds the second sub-part and is accommodated in the accommodating cavity, and is clamped between the top cover and the welding ring in the thickness direction of the top cover.
9. An energy storage device comprising the cap assembly of any one of claims 1-8.
10. A powered device comprising the energy storage device of claim 9.

Description

Top cap subassembly, energy memory and consumer Technical Field The application relates to the technical field of batteries, in particular to a top cover assembly, an energy storage device and electric equipment. Background Energy storage devices, such as battery cells, are widely used as the primary source of power for powered devices due to their recyclable nature. In the current top cap assembly of the battery cell, the pole column generally comprises a pole column body and a welding ring, wherein after the pole column body penetrates through the top cap and the lower plastic, the welding ring is fixedly connected to the peripheral wall of the pole column body protruding from the lower plastic. However, in the process of fixedly connecting the welding ring and the pole body, energy is easily transmitted to the lower plastic through the welding ring, so that the lower plastic is damaged, and the yield of the top cover assembly is low. Disclosure of utility model In view of the above, the present application provides a top cover assembly, an energy storage device and electric equipment. In a first aspect, the present application provides a header assembly. The top cover assembly comprises a top cover, lower plastic and a pole. The top cover comprises a first side and a second side which are opposite in the thickness direction, and is provided with a first through hole, and the first through hole penetrates through the first side of the top cover and the second side of the top cover. The lower plastic is arranged on the second side of the top cover and comprises a first side and a second side which are opposite to each other in the thickness direction, the first side of the lower plastic is opposite to the second side of the top cover, the second side of the lower plastic is provided with a mounting groove, and the lower plastic is also provided with a second through hole, and the second through hole penetrates through the bottom surface of the mounting groove and the first side of the lower plastic. The pole comprises a pole body and a welding ring, wherein the pole body penetrates through the first through hole and the second through hole and comprises a first end and a second end which are opposite to each other, the first end of the pole body protrudes relative to the first side of the top cover, the second end of the pole body protrudes relative to the bottom surface of the mounting groove, the welding ring is welded to the outer peripheral wall of the second end of the pole body and is spaced from the inner peripheral wall of the mounting groove, and the minimum distance between the welding ring and the inner peripheral wall of the mounting groove is greater than or equal to 1mm and less than or equal to 11mm. According to the technical scheme, the top cover assembly is separated from the inner peripheral wall of the mounting groove by the welding ring, the gap is larger than or equal to 1mm and smaller than or equal to 11mm, on one hand, the gap can block energy generated when the welding ring is fixed on the outer peripheral wall of the pole body protruding from the lower plastic, so that the energy cannot be transmitted to the lower plastic through the welding ring, and compared with the technical scheme that the gap exists between the welding ring and the inner peripheral wall of the mounting groove or between the welding ring and the welding ring, the gap is not in the size range, the lower plastic in the top cover assembly is not damaged due to the fact that the fixing operation of the pole body is carried out, and therefore the yield of the top cover assembly can be guaranteed, and on the other hand, the gap in the size range cannot influence the layout of other elements (such as a liquid injection hole and an explosion-proof valve) on the top cover. As an alternative aspect of the present application, the inner peripheral wall of the mounting groove is provided with a plurality of ribs, the plurality of ribs protrude from the inner peripheral wall of the mounting groove toward the center direction of the mounting groove, and the plurality of ribs are configured to contact the welding ring to define the position of the welding ring in the mounting groove. The inner peripheral wall of the mounting groove is provided with the convex rib, the convex rib can play a role in limiting the position of the welding ring when the welding ring is sleeved on the pole body for welding, the assembly deflection of the welding ring can be avoided, and the yield of the top cover assembly is ensured. As an alternative technical scheme of the application, in the thickness direction of the lower plastic, the contact height of the convex rib and the welding ring is at least 1/3 of the thickness of the welding ring, and the convex rib does not exceed the mounting groove. On the thickness direction of lower plastic, the contact height of protruding muscle and weld ring is at least 1/3 of the thickness of weld ring, an