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CN-224232760-U - Top cap subassembly, energy memory and consumer

CN224232760UCN 224232760 UCN224232760 UCN 224232760UCN-224232760-U

Abstract

The application provides a top cover assembly of an energy storage device, the energy storage device and electric equipment. The top cover assembly comprises a top cover, a flow collecting disc, a rivet head of a pulling rivet and a sealing piece. The top cap is equipped with first through-hole, and first through-hole is including the first chamber and the second chamber of intercommunication, and the size in first chamber is greater than the size in second chamber in order to form the step portion. The first side of the manifold plate is closer to the top cover. The collecting tray comprises a body part and a protruding part. The protruding part protrudes from the first side of the body part towards the top cover, and the protruding part is partially accommodated in the second cavity and is provided with a second through hole penetrating the protruding part. The stud includes an insertion portion, a first blocking portion, and a second blocking portion. The insertion part is arranged in the second through hole in a penetrating way. The first blocking part and the second blocking part are positioned at two opposite ends of the insertion part and are positioned outside the second through hole. The first blocking part is abutted against the second side of the protruding part. The second blocking part is abutted against the first side of the protruding part and the step part. The sealing element is positioned in the first cavity and is clamped between the second blocking part and the bottom of the second cavity.

Inventors

  • YANG WEIQIANG

Assignees

  • 厦门海辰储能科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250516

Claims (10)

  1. 1. A header assembly, comprising: the top cover comprises a first side and a second side which are opposite in a first 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, the first through hole comprises a first cavity and a second cavity which are communicated, the first cavity is closer to the first side of the top cover than the second cavity, and in a projection plane perpendicular to the first direction, the size of the first cavity is larger than that of the second cavity so as to form a step part; A current collecting tray including a first side and a second side opposite to each other in the first direction, the first side of the current collecting tray being closer to the second side of the top cover than the second side of the current collecting tray, the current collecting tray further including a body portion and a protrusion protruding from the first side of the body portion toward the top cover, the current collecting tray including a first side and a second side opposite to each other in the first direction, the protrusion being at least partially accommodated in the second cavity, the protrusion being provided with a second through hole penetrating the first side of the protrusion and the second side of the protrusion; The blind rivet head comprises an insertion part, a first blocking part and a second blocking part, wherein the insertion part is arranged in the second through hole in a penetrating way, the first blocking part and the second blocking part are positioned at the opposite ends of the insertion part and are positioned outside the second through hole, the first blocking part is in collision with the second side of the protruding part, the second blocking part is in collision with the first side of the protruding part and the step part, and And the sealing piece is positioned in the first cavity and is clamped between the second blocking part and the bottom of the second cavity.
  2. 2. The header assembly of claim 1, wherein the second blocking portion comprises first and second opposite sides, the first side abutting the step and the first side of the projection, the second side being provided with a recess, the bottom of the recess being higher than the first side of the projection.
  3. 3. The cap assembly of claim 1, wherein the stepped portion has a receiving groove therein, and the sealing member is at least partially received in the receiving groove.
  4. 4. The cap assembly of claim 1, wherein a weld is provided between the second barrier and the cap.
  5. 5. The cap assembly of claim 1, wherein the opening of the second cavity on the second side of the cap is provided with a first chamfer, and the top of the projection is provided with a second chamfer, the first chamfer being configured to mate with the second chamfer.
  6. 6. The header assembly of claim 1, wherein said header pan and said header are joined together at a second side of said header pan by ultrasonic welding.
  7. 7. The header assembly of claim 6, wherein the projection comprises a first sub-portion and a second sub-portion, the first sub-portion extending from a first side of the body portion in a projection and comprising a first side and a second side opposite in the first direction, the second sub-portion being connected to the first sub-portion and extending into the second cavity, the second sub-portion having a dimension smaller than a dimension of the first sub-portion in a projection plane perpendicular to the first direction, the second side of the first sub-portion being provided with a recess, the first blocking portion being located in the recess and abutting a bottom surface of the recess, the bottom surface of the recess being provided with a weld for ultrasonically welding the header and the current collector plate, the weld corresponding to the step portion in the first direction.
  8. 8. The cap assembly of claim 7, wherein the body portion includes a plurality of first regions and a plurality of second regions, the plurality of first regions and the plurality of second regions being alternately disposed in sequence around a center of the protrusion, a third through hole being provided in the first region, the third through hole penetrating a first side of the body portion and a second side of the body portion, the first side of the second region being recessed into the second side of the second region to form a receiving groove, the recess being in communication with at least one of the third through holes in each of the first regions through a connecting groove.
  9. 9. An energy storage device comprising the cap assembly of any one of claims 1-8.
  10. 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 energy storage, 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. The current single battery top cover assembly generally comprises a top cover and a current collecting disc, wherein the current collecting disc is matched with the top cover in a penetrating mode and then subjected to laser welding, liquid is injected into the electrode assembly through a liquid injection hole after laser welding, and the liquid injection hole is sealed through a sealing piece after liquid injection. Currently, in the top cover assembly, after the top cover and the current collecting disc are matched in a penetrating way, the top cover and the current collecting disc are not coaxial, and the gaps between the top cover and the current collecting disc in the circumferential direction are not consistent, namely, the gaps between some areas of the top cover and the current collecting disc are large, and the gaps between some areas of the top cover and the current collecting disc are small. If the longitudinal section is seen, the problem of single-side clearance exists between the two, namely, the problem of large clearance at one side and small clearance at the other side exists, and the maximum clearance at the side with large clearance can reach 0.275mm through calculation of a size chain. In order to cover the problem of single-side gaps, the welding line width and the welding depth of the welding line can be both large in the laser welding process of the current collecting disc and the top cover, and the welding heat is too large. After laser welding, the laser welding parts around can generate tensile stress due to cooling, and the tensile stress pulls the liquid injection holes of the collecting disc at the middle positions around, so that the size of the liquid injection holes is increased. Because the liquid injection hole becomes large, the fit interference between the sealing piece which can form good fit relation with the liquid injection hole and the large liquid injection hole is insufficient, electrolyte can leak outwards through the liquid injection hole, and the sealing performance of the top cover assembly is affected. 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, a flow collecting disc, a rivet head of a pull rivet and a sealing piece. The top cover comprises a first side and a second side which are opposite in a first direction, and is provided with a first through hole. The first through hole penetrates through the first side of the top cover and the second side of the top cover. The first through hole comprises a first cavity and a second cavity which are communicated. The first cavity is closer to the first side of the top cover than the second cavity, and the size of the first cavity is larger than that of the second cavity in a projection plane perpendicular to the first direction so as to form a step portion. The manifold tray includes first and second sides opposite in the first direction, the first side of the manifold tray being closer to the second side of the top cover than the second side of the manifold tray. The collecting tray further comprises a body part and a protruding part. The protruding portion protrudes from the first side of the body portion toward the top cover and includes a first side and a second side opposite in the first direction. The protruding portion is at least partially accommodated in the second cavity, and is provided with a second through hole, and the second through hole penetrates through the first side of the protruding portion and the second side of the protruding portion. The stud includes an insertion portion, a first blocking portion, and a second blocking portion. The insertion part penetrates through the second through hole. The first blocking portion and the second blocking portion are located at opposite ends of the insertion portion and are located outside the second through hole. The first blocking portion abuts against the second side of the protruding portion. The second blocking portion abuts against the first side of the protruding portion and the step portion. The sealing element is positioned in the first cavity and is clamped between the second blocking part and the bottom of the second cavity. In the technical scheme, the top cover assembly rivets the top cover, the current collecting disc and the sealing piece by using a rivet pulling process, so that the top cover, the current collecting disc and the sealing piece can be fir