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CN-224217572-U - Battery monomer and battery pack

CN224217572UCN 224217572 UCN224217572 UCN 224217572UCN-224217572-U

Abstract

The application relates to the technical field of batteries and discloses a battery unit and a battery pack, wherein the battery unit comprises a cover plate, a fixing piece, a pole column, a sealing piece and a first insulating piece, wherein the cover plate is provided with a first mounting hole penetrating through the cover plate along a second direction, the pole column penetrates through the first mounting hole, the fixing piece surrounds the pole column and is fixedly connected with the pole column, the fixing piece comprises an assembling boss, a limiting groove is formed by the assembling boss and the cover plate along the second direction, the sealing piece surrounds the fixing piece, the sealing piece comprises a second sealing part and a third sealing part which are connected along the first direction, the second sealing part and the third sealing part are both positioned in the limiting groove, the second sealing part is abutted with the assembling boss and the cover plate along the second direction, the third sealing part is positioned on one side of the second sealing part, which is far away from the pole column, and the first insulating part of the first insulating piece is positioned in the limiting groove, and the third sealing part is abutted with the first insulating part and the assembling boss along the second direction. The risk of shorting the cover plate to the pole is reduced.

Inventors

  • Hou Zhanrui
  • HU MINGJIANG
  • QIN JISHENG
  • ZHANG MENG
  • WU ZHIKANG
  • YANG WEI

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250521

Claims (10)

  1. 1. A battery cell having intersecting first (X) and second (Z) directions, comprising: A cover plate (1) provided with a first mounting hole (11) penetrating along the second direction (Z); the pole column (3) is penetrated through the first mounting hole (11); The fixing piece (2) surrounds the pole column (3) and is fixedly connected with the pole column (3), the fixing piece (2) comprises an assembling boss (22), and a limit groove (8) is formed in the second direction (Z) by the assembling boss (22) and the cover plate (1); A seal (4) surrounding the fixing piece (2), wherein the seal (4) comprises a second seal part (42) and a third seal part (43) which are connected along the first direction (X), the second seal part (42) and the third seal part (43) are both positioned in the limit groove (8), the second seal part (42) is abutted with the assembling boss (22) and the cover plate (1) along the second direction (Z), and the third seal part (43) is positioned on one side of the second seal part (42) away from the pole (3) along the first direction (X); First insulating part (5), including first insulating part (51), first insulating part (51) are located apron (1) are close to one side of assembly boss (22), just first insulating part (51) are located in spacing groove (8), wherein, along second direction (Z), third sealing part (43) with first insulating part (51) with assembly boss (22) butt.
  2. 2. The battery cell according to claim 1, wherein the third sealing portion (43) is recessed in the second direction (Z) in a direction closer to the fitting boss (22) than the second sealing portion (42) to form a seal groove (44), and the first insulating portion (51) is partially located within the seal groove (44).
  3. 3. The battery cell according to claim 2, wherein the first insulating portion (51) includes a main body portion (511) and a protruding portion (512) connected in the first direction (X), the main body portion (511) being partially located in the limit groove (8), the protruding portion (512) extending in the first direction (X) in a direction approaching the second sealing portion (42), and the protruding portion (512) being located in the seal groove (44).
  4. 4. A battery cell according to claim 3, characterized in that, in the first direction (X), an end of the third sealing portion (43) facing away from the second sealing portion (42) abuts the main body portion (511).
  5. 5. The battery cell according to claim 1, wherein the fixing member (2) further comprises a fixing body (21), the fixing body (21) is connected with the assembling boss (22) along the second direction (Z), the fixing body (21) is penetrated through the first mounting hole (11), and the fixing body (21) is fixedly connected with the pole (3).
  6. 6. The battery cell according to claim 5, wherein the battery cell (1000) further comprises a second insulating member (6), the second insulating member (6) being provided on a side of the cover plate (1) facing away from the assembly boss (22) along the second direction (Z); The sealing element (4) further comprises a first sealing part (41), the first sealing part (41) is connected with the second sealing part (42) along the second direction (Z), the first sealing part (41) is positioned at one end, deviating from the third sealing part (43), of the second sealing part (42), and the end, deviating from the second sealing part (42), of the first sealing part (41) is abutted with the second insulating element (6) along the second direction (Z).
  7. 7. The battery cell according to claim 6, wherein the second insulating member (6) has an extension portion (61), the extension portion (61) extending in the second direction (Z), the extension portion (61) penetrating the first mounting hole (11) and being located between the fixing body (21) and the cover plate (1); In the second direction (Z), the first sealing part (41) is abutted with the extension part (61).
  8. 8. The battery cell according to claim 5, wherein the battery cell (1000) further comprises a fixation ring (9), the fixation ring (9) being located on a side of the second insulating member (6) facing away from the cover plate (1) in the second direction (Z), and the fixation ring (9) being fixedly connected with the fixation body (21).
  9. 9. The battery cell according to claim 1, wherein the battery cell (1000) further comprises a third insulating member (7), the third insulating member (7) is connected with one side of the cover plate (1) close to the assembly boss (22), and along the second direction (Z), at least part of the third insulating member (7) is disposed on one side of the assembly boss (22) away from the cover plate (1), the third insulating member (7) is provided with a avoidance hole (71) penetrating along the second direction (Z), and the avoidance hole (71) is disposed opposite to the pole (3).
  10. 10. Battery pack, characterized by comprising a battery cell (1000) according to claims 1-9.

Description

Battery monomer and battery pack Technical Field The application relates to the technical field of batteries, in particular to a battery monomer and a battery pack. Background With the increasing maturity of battery technology, battery monomer is widely applied to electric automobile and energy storage field, and the performance and the security requirement of battery monomer are rising increasingly. However, in the existing battery monomer, electrolyte is easy to immerse between the cover plate and the pole, so that the risk of short circuit between the cover plate and the pole is greatly improved. Disclosure of utility model The application provides a battery cell and a battery pack, which greatly reduce the risk of short circuit between a cover plate and a pole caused by immersion of electrolyte. In order to achieve the above purpose, the main technical scheme adopted by the application comprises the following steps: In a first aspect, an embodiment of the present application provides a battery cell having a first direction and a second direction that intersect, including: The cover plate is provided with a first mounting hole penetrating through the cover plate along a second direction; the pole is penetrated through the first mounting hole; The fixing piece surrounds the pole and is fixedly connected with the pole, the fixing piece comprises an assembly boss, and a limit groove is formed between the assembly boss and the cover plate in the second direction; the sealing piece surrounds the fixing piece, the sealing piece comprises a second sealing part and a third sealing part which are connected along a first direction, the second sealing part and the third sealing part are both positioned in the limiting groove, the second sealing part is abutted with the assembling boss and the cover plate along a second direction, and the third sealing part is positioned at one side of the second sealing part, which is away from the pole, along the first direction; The first insulating piece comprises a first insulating part, the first insulating part is positioned on one side, close to the assembly boss, of the cover plate, and the first insulating part is partially positioned in the limiting groove, wherein the third sealing part is abutted with the first insulating part and the assembly boss along the second direction. According to the battery cell provided by the embodiment of the first aspect of the application, the connection and sealing of the third sealing part, the first insulating part and the assembly boss in the second direction are realized, the risk that electrolyte enters a gap between the cover plate and the assembly boss can be reduced, the risk that the cover plate and the pole are short-circuited due to the immersion of the electrolyte is reduced, and good insulativity between the fixing piece and the cover plate is ensured. Optionally, the third sealing portion is recessed in a direction closer to the mounting boss than the second sealing portion along the second direction to form a sealing groove, and the first insulating portion is partially located in the sealing groove. Optionally, the first insulating portion includes a main body portion and a protruding portion connected along a first direction, the main body portion is located in the limiting groove, the protruding portion extends along the first direction in a direction close to the second sealing portion, and the protruding portion is located in the sealing groove. Optionally, in the first direction, an end of the third sealing portion facing away from the second sealing portion abuts the main body portion. Optionally, the fixing piece further comprises a fixing body, the fixing body is connected with the assembling boss along the second direction, the fixing body penetrates through the first mounting hole, and the fixing body is fixedly connected with the pole. Optionally, the battery unit further includes a second insulating member, where the second insulating member is disposed on a side of the cover plate facing away from the assembly boss along the second direction; The sealing piece further comprises a first sealing part, the first sealing part is connected with the second sealing part along the second direction, the first sealing part is located at one end of the second sealing part, deviating from the third sealing part, and the end of the first sealing part, deviating from the second sealing part, is abutted with the second insulating piece along the second direction. Optionally, the second insulating member has an extension portion, the extension portion extends along the second direction, and the extension portion is disposed through the first mounting hole and is located between the fixing body and the cover plate; the first sealing part is abutted with the extending part along the second direction. Optionally, the battery unit further includes a fixing ring, along the second direction, the fixing ring is located at a side of