CN-224217571-U - Battery monomer and battery pack

CN224217571UCN 224217571 UCN224217571 UCN 224217571UCN-224217571-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 first insulating piece and a second insulating piece, wherein a first mounting hole penetrating the cover plate is formed in the cover plate along a second direction, the pole column penetrates through the first mounting hole, the fixing piece comprises a fixing body and an assembling boss which are connected along the second direction, the fixing body penetrates through the first mounting hole, the fixing body is arranged around the pole column and fixedly connected with the pole column, the assembling boss extends along the first direction to deviate from the pole column direction, a limit groove is formed between the assembling boss and the cover plate along the second direction, the first insulating piece is partially positioned in the limit groove, the second insulating piece comprises a first insulating part, the first insulating part is arranged on one side of the assembling boss close to the cover plate and is positioned in the limit groove, and the first insulating part is abutted between the first insulating piece and the assembling boss along the second direction. The risk of short circuit between the cover plate and the pole caused by immersion of electrolyte 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. A battery cell having a first direction (X) and a second direction (Z) perpendicular to each other, 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) comprises a fixing body (21) and an assembling boss (22) which are connected along the second direction (Z), wherein the fixing body (21) penetrates through the first mounting hole (11), the fixing body (21) is arranged around the pole (3) and is fixedly connected with the pole (3), the assembling boss (22) extends along the first direction (X) in a direction deviating from the pole (3), and the assembling boss (22) and the cover plate (1) form a limiting groove (9) in the second direction (Z); a first insulating member (5) partially located in the limit groove (9), and, The second insulating part (6) comprises a first insulating part (61), the first insulating part (61) is arranged on one side, close to the cover plate (1), of the assembly boss (22) and is positioned in the limit groove (9), and the first insulating part (61) is abutted between the first insulating part (5) and the assembly boss (22) along the second direction (Z).
2. The battery cell according to claim 1, wherein the first insulating member (5) comprises an insulating body (51), the insulating body (51) being located within the limiting groove (9), the first insulating portion (61) abutting between the insulating body (51) and the fitting boss (22) along the second direction (Z).
3. The battery cell according to claim 2, wherein the first insulating member (5) further comprises a protrusion (52), the protrusion (52) being connected to the insulating body (51) in the first direction (X), the protrusion (52) protruding in the second direction (Z) in a direction away from the cover plate (1); The second insulating piece (6) further comprises a second insulating part (62) connected with the first insulating part (61), the second insulating part (62) is connected with the outer peripheral surface of the assembling boss (22), the second insulating part (62) extends along the second direction (Z), and the second insulating part (62) is partially abutted between the protrusion (52) and the assembling boss (22).
4. A battery cell according to claim 3, wherein the second insulating member (6) further comprises a third insulating portion (63) connected to the second insulating portion (62), the third insulating portion (63) being disposed to extend in the first direction (X), the third insulating portion (63) being connected to a side of the fitting boss (22) remote from the cover plate (1).
5. The battery cell according to claim 1, further comprising a seal (4), the seal (4) surrounding the fixture (2); The sealing element (4) comprises a first sealing part (41), the first sealing part (41) is positioned in the limit groove (9), the first sealing part (41) and the first insulating element (5) are arranged at intervals along the first direction (X), and the first sealing part (41) is abutted with the assembling boss (22) and the cover plate (1) along the second direction (Z); Along the second direction (Z), the end of the first insulating part (61) close to the fixed body (21) along the first direction (X) is abutted with the first sealing part (41) and the assembling boss (22).
6. The battery cell according to claim 5, wherein the battery cell (1000) further comprises a third insulating member (7), a portion of the third insulating member (7) being provided on a side of the cover plate (1) facing away from the assembly boss (22) in the second direction (Z); The sealing element (4) further comprises a second sealing part (42), the second sealing part (42) is connected with the first sealing part (41) along the second direction (Z), and the end part, deviating from the first sealing part (41), of the second sealing part (42) is abutted with the third insulating element (7) along the second direction (Z).
7. The battery cell according to claim 6, wherein the third insulating member (7) has an extension portion (71), the extension portion (71) being interposed between the fixing body (21) and the cover plate (1), and the second sealing portion (42) being abutted against the extension portion (71) in the second direction (Z).
8. The battery cell according to claim 6, wherein the battery cell (1000) further comprises a fixing ring (10), the fixing ring (10) is located at a side of the third insulating member (7) facing away from the cover plate (1), and the fixing ring (10) is fixedly connected with the fixing body (21).
9. The battery cell according to claim 4, wherein the battery cell (1000) further comprises a fourth insulating member (8) and a housing (200), the cover plate (1) is connected with the housing (200), the fourth insulating member (8) is connected with a side of the cover plate (1) close to the housing (200), and along the second direction (Z), a portion of the fourth insulating member (8) is disposed on a side of the mounting boss (22) away from the cover plate (1), the fourth insulating member (8) is provided with a positioning hole (81), and an end portion of the third insulating portion (63) along the first direction (X) is close to the positioning hole (81).
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 perpendicular to each other, including: the cover plate is provided with a first mounting hole penetrating along a second direction; the pole is penetrated through the first mounting hole; The fixing piece comprises a fixing body and an assembling boss, wherein the fixing body and the assembling boss are connected along a second direction, the fixing body penetrates through the first mounting hole, and the fixing body is arranged around the pole and fixedly connected with the pole; A first insulating member partially disposed within the spacing groove, and, The second insulating part comprises a first insulating part, the first insulating part is arranged on one side, close to the cover plate, of the assembly boss and is positioned in the limiting groove, and the first insulating part is abutted between 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 second insulating piece is further arranged on the basis of the first insulating piece, and the first insulating part of the second insulating piece is abutted between the first insulating piece and the assembling boss of the fixing piece along the second direction. From this, can improve the sealed effect between first insulating part and the assembly boss through first insulating part, reduce the electrolyte and get into the risk of the gap between apron and the assembly boss between first insulating part and the assembly boss to be favorable to reducing the risk that leads to apron and utmost point post short circuit because of the electrolyte is immersed, and then improved the insulating properties between apron and the utmost point post. Optionally, the first insulating part includes an insulating main body, the insulating main body is located in the limiting groove, and the first insulating part is abutted between the insulating main body and the assembling boss along the second direction. Optionally, the first insulating member further includes a protrusion connected to the insulating body in a first direction, the protrusion protruding in a second direction away from the cover plate; The second insulating part further comprises a second insulating part connected with the first insulating part, the second insulating part is connected with the outer peripheral surface of the assembly boss, the second insulating part extends along the second direction, and the second insulating part is arranged between the boss and the assembly boss in a partially abutting mode. Optionally, the second insulating part further includes a third insulating part connected to the second insulating part, the third insulating part extends along the first direction, the third insulating part is opposite to and spaced apart from the first insulating part along the second direction, and the third insulating part is connected to a side of the assembly boss away from the cover plate body. Optionally, the battery cell further comprises a seal surrounding the fixture; The sealing piece comprises a first sealing part which is positioned in the limiting groove, the first sealing part and the first insulating piece are arranged at intervals along a first direction, and the first sealing part is abutted with the assembling boss and the cover plate along a second direction; Along the second direction, the end part, close to the fixing body along the first direction, of the first insulating part is abutted with the first sealing part and the assembling boss. Optionally, the battery unit further includes a third insulating member, and a portion of the third 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 second sealing part, the second sealing part is connected with the first sealing part along a second direction