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CN-224204183-U - Battery cell

CN224204183UCN 224204183 UCN224204183 UCN 224204183UCN-224204183-U

Abstract

The utility model discloses a battery, which relates to the technical field of batteries, and comprises a side frame, a fixing ring and an electrode assembly, wherein the side frame is made of metal materials, the fixing ring is connected with the side frame and protrudes outwards from the side frame, the fixing ring is provided with a through hole communicated with the inner side and the outer side of the side frame, the electrode assembly comprises an electrode column penetrating through the through hole and an annular insulating ring filled between the inner wall of the through hole and the electrode column, the insulating structure between the electrode column and the side frame is simpler, the number of parts is reduced, the cost is reduced, and meanwhile, the part of the electrode assembly positioned in the battery is fewer, the occupation of the internal space of the battery is reduced, and the energy density of the battery is improved.

Inventors

  • CHEN ZHENGMIN
  • CHEN HAIFENG

Assignees

  • 苏州中科瑞龙科技有限公司

Dates

Publication Date
20260505
Application Date
20250320

Claims (16)

  1. 1. A battery, comprising: the side frame (2), the side frame (2) is made of metal material; A fixing ring (3), wherein the fixing ring (3) is connected with the side frame (2) and protrudes outwards from the side frame (2), the fixing ring (3) is provided with a through hole (30) communicated with the inner side and the outer side of the side frame (2), and An electrode assembly (4) comprising an electrode column (40) penetrating into the through hole (30) and an annular insulating ring (41) filled between the inner wall of the through hole (30) and the electrode column (40).
  2. 2. The battery according to claim 1, characterized in that the fixing ring (3) is integrally formed with the side frame (2).
  3. 3. The battery according to claim 1, wherein the insulating ring (41) has a wall thickness at both ends in the axial direction of the electrode column (40) that is larger than a wall thickness at the center thereof.
  4. 4. The battery according to claim 1, wherein the inner wall of the through hole (30) includes a first arc portion (300), a first transition portion (301), and a second arc portion (302) which are sequentially provided along the axial direction of the electrode post (40), the first arc portion (300) being closer to the inner surface of the side frame (2) than the second arc portion (302), the first arc portion (300) protruding toward the side of the electrode post (40), and the second arc portion (302) being recessed away from the side of the electrode post (40).
  5. 5. The battery according to claim 4, wherein the first circular arc portion (300) is connected to the inner surface (2 a) of the side frame (2), and the second circular arc portion (302) is connected to the end face (31) of the fixing ring (3).
  6. 6. The battery according to claim 4, wherein the outer wall of the electrode column (40) includes a first inclined portion (401), a second transition portion (402), and a second inclined portion (403) that are provided in this order along the axial direction of the electrode column (40), the cross-sectional area of the electrode column (40) gradually increases toward the side where the second transition portion (402) is located, and the positions of the first inclined portion (401), the second transition portion (402), and the second inclined portion (403) correspond to the first arc portion (300), the first transition portion (301), and the second arc portion (302), respectively.
  7. 7. The battery according to claim 6, wherein a minimum distance between the first transition portion (301) and the second transition portion (402) is not less than 0.2mm.
  8. 8. The battery according to claim 6, wherein an angle α1 between the first inclined portion (401) and the axis of the electrode column (40) is 3 ° to 45 °, and an angle α2 between the second inclined portion (403) and the axis of the electrode column (40) is 3 ° to 45 °.
  9. 9. The battery according to claim 6, characterized in that the electrode column (40) comprises an inner connection (400) for connection to a tab of a cell of the battery and an outer connection (404) for connection to an external electricity consumer, the inner connection (400) extending beyond the inner surface of the side frame (2), the outer connection (404) extending beyond the end face (31) of the securing ring (3).
  10. 10. The battery according to claim 9, wherein the end face (31) of the fixing ring (3) is disposed obliquely with respect to the axis of the electrode column (40) and its sectional area gradually increases toward the outside of the side frame (2).
  11. 11. The battery according to claim 10, wherein the outer surface of the outer connecting portion (404) is disposed in parallel with the axis of the electrode column (40), or The outer surface of the outer connecting part (404) is inclined relative to the axis of the electrode column (40), and the cross-sectional area thereof is gradually reduced towards the outside of the side frame (2).
  12. 12. The battery according to claim 10, wherein the outer surface of the inner connecting portion (400) is disposed in parallel with the axis of the electrode column (40), or The outer surface of the inner connecting part (400) is inclined relative to the axis of the electrode column (40), and the cross-sectional area thereof is gradually reduced towards the outside of the side frame (2).
  13. 13. The battery according to claim 10, characterized in that the insulating ring (41) is simultaneously filled between the end face (31) of the fixing ring (3) and the electrode column (40).
  14. 14. A battery according to claim 13, wherein the insulating ring (41) covers the outer surface of the portion of the fixing ring (3) connected to the end face (31) at the same time.
  15. 15. The battery according to any one of claims 1 to 14, wherein the side frame (2) is ring-shaped, the battery further comprises a cover plate (50) and a bottom plate (51) respectively connected to both ends of the side frame (2), the cover plate (50) is separately arranged from the side frame (2), and the bottom plate (51) and the side frame (2) are separately arranged or integrally formed.
  16. 16. The battery according to any one of claims 1 to 14, characterized in that the material of the insulating ring (41) is glass; The electrode column (40) is made of molybdenum; the side frames (2) are made of stainless steel.

Description

Battery cell Technical Field The utility model relates to the technical field of battery manufacturing, in particular to a battery. Background The battery comprises a battery shell, a positive electrode, a negative electrode, a battery core and other parts. Some battery cases are made of metal materials, for example, a battery case and a positive electrode are respectively connected with two tabs of a battery core, so that the battery case and the positive electrode can be used as two electrodes of the battery. In order to prevent the positive electrode and the battery case from being short-circuited by contact, an insulating treatment is required between the positive electrode and the battery case. Fig. 1 shows a schematic structure of insulation between a positive electrode and a battery case, which includes an outer insulation part 11 located outside the battery case 10, an inner insulation part 12 located inside the battery case 10, an annular insulation part 14 located between an electrode 13 and the battery case 10, and a conductive sheet 15 connected to the electrode 13, the conductive sheet 15 being connected to a battery cell, and the conductive sheet 15, the electrode 13 and the battery case 10 being isolated by the outer insulation part 11, the inner insulation part 12 and the annular insulation part 14 in order to secure an insulation effect. The two ends of the electrode 13 are thickened through the two ends of the rivet electrode 13, so that limit and fixation are realized. The illustrated insulating structure is relatively complex, the number of parts is large, assembly is relatively difficult, and in order to ensure the insulating effect, the outer portion of the inner insulating portion 12 needs to extend to the periphery of the conductive sheet 15, so that occupation of the inner space of the battery is increased, and improvement of the energy density of the battery is not facilitated. Accordingly, there is a need for an improvement over the prior art to overcome the deficiencies described in the prior art. The foregoing is provided merely to facilitate the understanding of the principles of the application and is not admitted to be prior art by the foregoing disclosure. Disclosure of utility model The utility model aims to provide a battery, which is used for simplifying the insulation structure of an electrode. To achieve the above object, the present utility model provides a battery comprising: the side frame is made of a metal material; A fixing ring connected with the side frame and protruding outwards from the side frame, the fixing ring being provided with a through hole for communicating the inside and the outside of the side frame, and The electrode assembly comprises an electrode column penetrating through the through hole and an annular insulating ring filled between the inner wall of the through hole and the electrode column. Further, the fixing ring and the side frame are integrally formed. Further, the insulating rings have a wall thickness at both ends in the axial direction of the electrode column that is greater than a wall thickness at the center thereof. Further, the inner wall of the through hole comprises a first arc part, a first transition part and a second arc part which are sequentially arranged along the axial direction of the electrode column, the first arc part is closer to the inner surface of the side frame relative to the second arc part, the first arc part protrudes towards the side where the electrode column is located, and the second arc part is recessed away from the side where the electrode column is located. Further, the first arc part is connected with the inner surface of the side frame, and the second arc part is connected with the end surface of the fixing ring. Further, the outer wall of the electrode column comprises a first inclined portion, a second transition portion and a second inclined portion which are sequentially arranged along the axial direction of the electrode column, the cross-sectional area of the electrode column is gradually increased towards the side where the second transition portion is located, and the positions of the first inclined portion, the second transition portion and the second inclined portion correspond to the first arc portion, the first transition portion and the second arc portion respectively. Further, a minimum spacing between the first transition portion and the second transition portion is not less than 0.2mm. Further, an included angle alpha 1 between the first inclined part and the axis of the electrode column is 3-45 degrees, and an included angle alpha 2 between the second inclined part and the axis of the electrode column is 3-45 degrees. Further, the electrode column includes an inner connection portion for connection with a tab of a cell of the battery and an outer connection portion for connection with an external power device, the inner connection portion extending beyond an inner surface of the side