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CN-224204212-U - Battery cover plate and battery

CN224204212UCN 224204212 UCN224204212 UCN 224204212UCN-224204212-U

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate and a battery, wherein the battery cover plate comprises a cover plate body, a conductive electrode column, a sealing element and a compression ring, the cover plate body is provided with a pole column through hole, a first coating part and a second coating part which jointly form a containing groove, the conductive electrode post is accommodated in the accommodating groove in an insulating manner, the conductive electrode post comprises an electrode post main body and a connecting portion, the sealing element is sleeved on the connecting portion, the pressing ring is sleeved on the connecting portion and connected with the cover plate body, and the sealing element is compressed between the pressing ring and the conductive electrode post. The cover plate body is processed through the stamping process, and the stamping process is more accurate than the trimming process, so that the processing error is greatly reduced, the yield is improved, the compression ring connected with the cover plate body is sleeved on the connecting part of the conductive polar column, the fixing of the conductive polar column and the compression of the sealing element can be realized, the structural stability is ensured, and the product quality is improved.

Inventors

  • LI JIANJU
  • QIU YISHENG
  • LIU YONG
  • CHEN ZHAOYAN

Assignees

  • 深圳市科达利实业股份有限公司

Dates

Publication Date
20260505
Application Date
20250421

Claims (10)

  1. 1. Battery cover plate, its characterized in that, battery cover plate includes: The cover plate comprises a cover plate body (1), wherein a pole through hole (11), a first cladding part (12) and a second cladding part (13) are formed in the cover plate body (1) in a stamping mode, the first cladding part (12) is continuously arranged around the circumferential edge of the pole through hole (11), the first cladding part (12) extends along the direction close to the central axis of the pole through hole (11) to form the second cladding part (13), and the first cladding part (12) and the second cladding part (13) jointly form a containing groove (14); The conductive electrode column (2), the conductive electrode column (2) is accommodated in the accommodating groove (14) in an insulating manner, the conductive electrode column (2) comprises a electrode column main body (21) and a connecting part (22), the connecting part (22) is connected to one side, deviating from the second coating part (13), of the electrode column main body (21), the outer diameter of the electrode column main body (21) is larger than that of the connecting part (22), and a first limiting step surface (23) is formed at the junction of the electrode column main body (21) and the connecting part (22); the sealing piece (3) is sleeved on the connecting part (22) and is abutted to the first limiting step surface (23); The clamping ring (4) is sleeved on the connecting portion (22) and connected with the cover plate body (1), and the sealing piece (3) is compressed between the clamping ring (4) and the first limiting step surface (23).
  2. 2. Battery cover according to claim 1, characterized in that the cover body (1) is rivet-formed with a fixing part (15) connected with the pressure ring (4) at the edge of the post through hole (11).
  3. 3. Battery cover plate according to claim 2, characterized in that the edge of the pressure ring (4) close to the post through hole (11) is provided with a connecting groove (41) for accommodating the fixing part (15).
  4. 4. Battery cover according to claim 2, characterized in that the pressure at which the cover body (1) and the pressure ring (4) are riveted is F and F >1000N is satisfied.
  5. 5. Battery cover plate according to claim 2, characterized in that the fixing part (15) is welded with the pressure ring (4).
  6. 6. The battery cover plate according to claim 1, wherein the post body (21) includes a plug portion (211) and a limit portion (212), the limit portion (212) is connected between the plug portion (211) and the connection portion (22), a diameter of the plug portion (211) is larger than that of the connection portion (22) and smaller than that of the limit portion (212), a second limit step surface (213) is formed between the plug portion (211) and the limit portion (212), and the second limit step surface (213) is abutted to the second cladding portion (13).
  7. 7. The battery cover plate according to claim 6, further comprising an insulating member (5), wherein the insulating member (5) is interposed between the limiting portion (212) and the first coating portion (12) and between the plugging portion (211) and the second coating portion (13).
  8. 8. The battery cover plate according to claim 7, wherein the insulating member (5) comprises a first insulating portion (51), a second insulating portion (52) and a third insulating portion (53), a through hole (54) is formed in the first insulating portion (51) and is sandwiched between the limiting portion (212) and the second coating portion (13), the second insulating portion (52) is continuously disposed along a circumferential edge of the through hole (54) and is sandwiched between the plugging portion (211) and the second coating portion (13), and the third insulating portion (53) is continuously disposed along a circumferential edge outside the first insulating portion (51) and is sandwiched between the limiting portion (212) and the first coating portion (12).
  9. 9. Battery cover plate according to claim 1, characterized in that the sealing member (3) comprises a first sealing part (31) and a second sealing part (32), the first sealing part (31) is provided with a plugging through hole (33) for plugging the connecting part (22), the second sealing part (32) is continuously arranged along the circumferential edge of the plugging through hole (33), the first sealing part (31) is clamped between the press ring (4) and the pole main body (21), and the second sealing part (32) is clamped between the connecting part (22) and the press ring (4).
  10. 10. A battery, characterized in that the battery comprises a battery housing, a pole group and a battery cover plate according to any one of claims 1-9, which encloses the battery housing to form a receiving chamber for receiving the pole group.

Description

Battery cover plate and battery Technical Field The utility model relates to the technical field of batteries, in particular to a battery cover plate and a battery. Background The battery cover plate is an important part of the lithium battery, and the structural design of the battery cover plate not only affects the basic performances of the battery, such as capacity and charge-discharge efficiency, but also directly relates to the safety and long-term reliability of the battery. The main structural components of the battery cover plate comprise a conductive electrode column, a light aluminum plate, an insulating piece, a sealing piece and the like. Wherein in order to make things convenient for electrode post, insulating part and sealing member and light aluminum plate fixed connection, adopt the binding technology to process light aluminum plate generally to process hollow protruding structure on light aluminum plate, with insulating part, sealing member and electrode post all fixed connection inside protruding structure, thereby make things convenient for electrode post, insulating part and sealing member and light aluminum plate fixed connection. But the inner diameter and the outer diameter of the convex structure processed by the edging process are unstable, and larger processing errors exist, so that the yield of the battery cover plate is low, and the product quality is poor. Disclosure of utility model The utility model aims to provide a battery cover plate and a battery, which have high processing precision, high yield and good product quality. To achieve the purpose, the utility model adopts the following technical scheme: in one aspect, a battery cover plate is provided, the battery cover plate comprising: The cover plate body is provided with a pole through hole, a first cladding part and a second cladding part in a stamping mode, the first cladding part is continuously arranged around the circumferential edge of the pole through hole, the first cladding part extends along the direction close to the central axis of the pole through hole and is used for forming the second cladding part, and the first cladding part and the second cladding part jointly form a containing groove; The conductive electrode post is accommodated in the accommodating groove in an insulating manner, the conductive electrode post comprises a electrode post main body and a connecting part, the connecting part is connected to one side, deviating from the second coating part, of the electrode post main body, the outer diameter of the electrode post main body is larger than that of the connecting part, and a first limiting step surface is formed at the junction of the electrode post main body and the connecting part; the sealing piece is sleeved on the connecting part and is abutted to the first limiting step surface; The compression ring is sleeved on the connecting part and connected with the cover plate body, and the sealing piece is compressed between the compression ring and the first limiting step surface. Optionally, the cover plate body is formed with a fixing part connected with the pressing ring in a riveting manner at the edge of the pole through hole. Optionally, a connection groove for accommodating the fixing part is formed in the edge of the compression ring, which is close to the through hole of the pole. Optionally, the pressure when riveting the cover plate body and the pressing ring is F, and F >1000N is satisfied. Optionally, the fixing portion is welded with the pressure ring. Optionally, the post main part includes grafting portion and spacing portion, spacing portion connect in grafting portion with between the connecting portion, the diameter of grafting portion is greater than the connecting portion, and is less than spacing portion, grafting portion with form the spacing step face of second between the spacing portion, the spacing step face of second with second cladding portion butt. Optionally, the battery cover plate further includes an insulating member, and the insulating member is sandwiched between the limiting portion and the first cladding portion, and between the plugging portion and the second cladding portion. Optionally, the insulating part includes first insulating part, second insulating part and third insulating part, set up the through-hole on the first insulating part, and by the clamp locate spacing portion with between the second cladding portion, the second insulating part is followed the circumference edge of through-hole sets up in succession, and by the clamp locate between grafting portion with between the second cladding portion, the third insulating part is followed the circumference edge in the first insulating part outside sets up in succession, and by the clamp locate spacing portion with between the first cladding portion. Optionally, the sealing member includes first sealing portion and second sealing portion, offer on the first sealing portion and be used for the graf