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CN-224232753-U - Top cap subassembly, battery and consumer

CN224232753UCN 224232753 UCN224232753 UCN 224232753UCN-224232753-U

Abstract

The application provides a top cover assembly, a battery and electric equipment. The top cover comprises a first surface and a second surface which are arranged in a back-to-back mode, the top cover is provided with a first hole and a first mounting groove which are coaxially arranged and communicated, the first hole penetrates through the first surface and the second surface, the pole is arranged in the first hole in a penetrating mode, the upper plastic comprises an upper plastic body and a convex portion which are connected and sleeved on the outer side of the pole, the upper plastic body is arranged in the first mounting groove, the convex portion is arranged in the first hole, the outer surface of the convex portion comprises a guide inclined surface, a first transition cambered surface and a bottom surface, the bottom surface is an end face of one end of the convex portion, far away from the upper plastic body, the first transition cambered surface is connected between the guide inclined surface and the bottom surface in a bending mode, the sealing ring is sleeved on the outer side of the pole, part of the sealing ring is located in the first hole and in interference fit with the convex portion, and the sealing ring located in the first hole is in contact with the bottom surface and the first transition cambered surface. The technical scheme of the application can avoid the conduction of the top cover and the pole, and ensure the safety performance of the electrode assembly.

Inventors

  • Xiao Hepan
  • XU WEIDONG
  • LI WENBO

Assignees

  • 厦门海辰储能科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250415

Claims (13)

  1. 1. A header assembly, the header assembly comprising; The top cover comprises a first surface and a second surface, the first surface and the second surface are opposite to each other in the thickness direction of the top cover, the top cover is provided with a first hole and a first mounting groove, the first hole penetrates through the first surface and the second surface, an opening of the first mounting groove is positioned on the first surface, and the first mounting groove and the first hole are coaxially arranged and communicated; the pole is penetrated through the first hole; The upper plastic comprises an upper plastic body and a convex part which are connected, wherein the upper plastic body and the convex part are sleeved on the outer side of the pole, the upper plastic body is arranged in the first mounting groove, the convex part is arranged in the first hole, the outer surface of the convex part comprises a guide inclined plane, a first transitional cambered surface and a bottom surface, the bottom surface is the end surface of the convex part far away from one end of the upper plastic body, the distance between the guide inclined plane and the hole wall of the first hole gradually increases in the direction of the upper plastic body facing the convex part, and the first transitional cambered surface is bent and connected between the guide inclined plane and the bottom surface, and The sealing ring is sleeved on the outer side of the pole, part of the sealing ring is positioned in the first hole and in interference fit with one end of the convex part, which is far away from the upper plastic body, and the sealing ring positioned in the first hole is also in contact with the bottom surface and the first transitional cambered surface.
  2. 2. The cap assembly of claim 1, wherein a first gap is formed between the guide ramp and an inner wall of the first bore, and a portion of the seal ring is positioned within the first gap and covers at least a portion of the guide ramp.
  3. 3. The header assembly of claim 1, wherein the outer surface of the boss further comprises an outer side surface disposed opposite the inner wall of the first bore and a second transitional cambered surface crimped between the outer side surface and the guide ramp.
  4. 4. The top cover assembly of claim 1, wherein the upper plastic is provided with a first through hole penetrating through the upper plastic body and the convex part along the thickness direction of the upper plastic, and the pole is penetrated through the first through hole; The outer surface of the convex part further comprises a third transitional cambered surface, the third transitional cambered surface is connected between the bottom surface and the inner wall of the first through hole in a bending mode, and the third transitional cambered surface is in contact with the sealing ring positioned in the first hole.
  5. 5. The top cover assembly of claim 1, wherein a fourth transitional cambered surface is connected between the bottom wall of the first mounting groove and the inner wall of the first hole, and the connection part of the upper plastic body and the convex part is arranged opposite to the fourth transitional cambered surface.
  6. 6. The cap assembly according to any one of claims 1 to 5, wherein the interference of the sealing ring with the upper plastic in the thickness direction of the cap assembly is in the range of 0.1mm to 0.3 mm.
  7. 7. The header assembly of claim 2, further comprising a lower plastic, the lower plastic being laminated with the header, the lower plastic being provided with a second hole extending through the lower plastic in a thickness direction of the lower plastic and communicating with the first hole; The pole comprises a column body and a base, the column body penetrates through the first hole, the second hole and the upper plastic, the base and the column body are coaxially arranged and connected, and the base is positioned on one side of the lower plastic, which is opposite to the top cover, and a second gap is formed between the base and the lower plastic; The sealing ring is sleeved on the cylinder and is positioned in the first hole, the second hole, the first gap and the second gap, and the sealing ring positioned in the second gap is in interference fit with the lower plastic in the thickness direction of the top cover assembly.
  8. 8. The cap assembly of claim 7, wherein the lower plastic is provided with a thinned groove, an opening of the thinned groove being located on a surface of the lower plastic facing away from the cap, the thinned groove being coaxially disposed with and in communication with the second aperture, the thinned Bao Caoxing being part of the second gap.
  9. 9. The cap assembly of claim 8, wherein a distance between a bottom wall of the thinned groove and a surface of the lower plastic facing the cap is in a range of 0.1mm-0.7 mm.
  10. 10. The cap assembly of claim 8, wherein the sealing ring is in contact with the inner wall of the first hole, the inner wall of the second hole, the bottom wall of the thinning groove, and a portion of the surface of the cap facing the lower plastic, the sealing ring in the first hole is in interference fit with the cap in a radial direction of the sealing ring, and the sealing ring in the second hole is in interference fit with the lower plastic in a radial direction of the sealing ring.
  11. 11. The cap assembly of any one of claims 8-10, wherein the overlap length of the sealing ring and the lower plastic is greater than or equal to 0.2mm in the length direction of the cap assembly.
  12. 12. A battery, wherein the battery comprises an electrode assembly, a case, and the top cap assembly according to any one of claims 1 to 11, the top cap assembly is connected to the case and surrounds the case to form a receiving space, and the electrode assembly is located in the receiving space.
  13. 13. An electric device is characterized in that, the powered device comprising the battery of claim 12.

Description

Top cap subassembly, battery and consumer Technical Field The application relates to the technical field of energy storage, in particular to a top cover assembly, a battery and electric equipment. Background With the development of green energy and the enhancement of environmental awareness, batteries with recycling characteristics are increasingly used. The battery includes an electrode assembly, a case, and a top cap assembly. The electrode assembly is positioned in an accommodating space defined by the case and the top cap assembly. The top cap subassembly includes top cap and utmost point post. The pole is mounted on the top cover. At present, gaps exist between the top cover and the pole, so that the electrolyte is easy to invade, the insulativity between the top cover and the pole is reduced, the top cover and the pole are easy to conduct, and the safety performance of the electrode assembly is reduced. Disclosure of utility model The embodiment of the application provides a top cover assembly, a battery and electric equipment, which can avoid the conduction of the top cover and a pole, and ensure the safety performance of the electrode assembly. In a first aspect, the present application provides a top cap assembly comprising; The top cover comprises a first surface and a second surface, the first surface and the second surface are opposite to each other in the thickness direction of the top cover, the top cover is provided with a first hole and a first mounting groove, the first hole penetrates through the first surface and the second surface, an opening of the first mounting groove is positioned on the first surface, and the first mounting groove and the first hole are coaxially arranged and communicated; the pole is penetrated through the first hole; The upper plastic comprises an upper plastic body and a convex part which are connected, wherein the upper plastic body and the convex part are sleeved on the outer side of the pole, the upper plastic body is arranged in the first mounting groove, the convex part is arranged in the first hole, the outer surface of the convex part comprises a guide inclined plane, a first transitional cambered surface and a bottom surface, the bottom surface is the end surface of the convex part far away from one end of the upper plastic body, the distance between the guide inclined plane and the hole wall of the first hole gradually increases in the direction of the upper plastic body facing the convex part, and the first transitional cambered surface is bent and connected between the guide inclined plane and the bottom surface, and The sealing ring is sleeved on the outer side of the pole, part of the sealing ring is positioned in the first hole and in interference fit with one end of the convex part, which is far away from the upper plastic body, and the sealing ring positioned in the first hole is also in contact with the bottom surface and the first transitional cambered surface. It is understood that in the related art, after the assembled cap assembly contacts the electrolyte, the electrolyte may intrude into the region of the cap assembly where the post is located. Due to errors such as manufacturing tolerances of various components in the top cover assembly and assembly tolerances during assembly, gaps are formed between the top cover and the pole. When the electrolyte exists in the gap, the insulation performance between the top cover and the pole is easy to be drastically reduced, so that the safety of the electrode assembly is reduced. Therefore, the upper plastic and the sealing ring are arranged in the gap between the top cover and the pole, and the sealing ring positioned in the gap between the top cover and the pole is in interference fit with the upper plastic. The upper plastic and the sealing ring can be matched to effectively seal the gap between the top cover and the pole, block the flow path of electrolyte, avoid the problem of short circuit caused by the conduction of the pole and the top cover due to the contact of the electrolyte, and be favorable for improving the safety performance of the electrode assembly. In addition, through the one end that the plastic body was kept away from at the convex part forms the direction inclined plane, can utilize the direction effect of direction inclined plane when last plastic and top cap equipment, and make the convex part slide into the first downthehole of top cap fast to realize the quick assembly between last plastic and the top cap, reduce the equipment time of top cap subassembly, improve the packaging efficiency of top cap subassembly. In addition, because be connected with first transition cambered surface between direction inclined plane and the bottom surface, consequently, the transition department between direction inclined plane and the bottom surface can be by first transition cambered surface softening, effectively avoids stress concentration, improves the intensity of going up the plastic t