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CN-224217502-U - Can annotate explosion-proof bipolar electric core structure of liquid

CN224217502UCN 224217502 UCN224217502 UCN 224217502UCN-224217502-U

Abstract

The application relates to a bipolar battery cell structure capable of injecting liquid and explosion-proof, which comprises a first end plate, at least one battery cell unit and a second end plate, wherein the battery cell unit is arranged between the first end plate and the second end plate, each battery cell unit comprises a first current collector, a core body, a metal ring sealing ring and a second current collector, the first current collector, the metal ring sealing ring and the second current collector are sequentially stacked to form a sealing cavity, the metal ring sealing ring is sleeved on the outer side of the core body, the core body is respectively abutted to the first current collector and the second current collector, at least one explosion-proof liquid injection hole is formed in the metal ring sealing ring, and the explosion-proof liquid injection hole is communicated with the sealing cavity. According to the application, the functions of liquid injection and explosion prevention are realized through the metal ring sealing ring, the process and the functions of a conventional lithium battery are more matched, the explosion prevention safety performance of the battery cell is enhanced, and the metal ring sealing ring has higher practicability and economy and can be used as a universal product for production and use.

Inventors

  • LIAO CHENGQUAN

Assignees

  • 深圳市雄韬电源科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250325

Claims (13)

  1. 1. The bipolar battery cell structure is characterized by comprising a first end plate, at least one battery cell unit and a second end plate, wherein the battery cell unit is arranged between the first end plate and the second end plate; the battery cell unit comprises a first current collector, a core body, a metal ring sealing ring and a second current collector, wherein the first current collector, the metal ring sealing ring and the second current collector are sequentially stacked to form a sealing cavity, the metal ring sealing ring is sleeved on the outer side of the core body, and the core body is respectively abutted with the first current collector and the second current collector; the metal ring sealing ring is provided with at least one explosion-proof liquid injection hole, and the explosion-proof liquid injection hole is communicated with the sealing cavity.
  2. 2. The bipolar battery cell structure capable of being filled with liquid and explosion-proof according to claim 1, wherein the metal ring sealing ring comprises a metal ring and a sealing ring, the metal ring is clamped in the sealing ring, the explosion-proof liquid filling hole is formed in the metal ring, and the explosion-proof liquid filling hole extends from one side of the metal ring to the other side of the metal ring.
  3. 3. The bipolar battery cell structure capable of being filled with liquid and explosion-proof according to claim 2, wherein a through hole screw is arranged in the explosion-proof liquid filling hole, one end of the through hole screw, which is close to the core body, is communicated with the sealing cavity, and an explosion-proof nut is arranged at one end of the through hole screw, which is far away from the core body.
  4. 4. The bipolar battery cell structure capable of being filled with liquid and explosion-proof according to claim 3, wherein a sealing gasket is arranged at one end, close to the explosion-proof screw cap, of the through hole screw, the sealing gasket is sleeved on the through hole screw, and the sealing gasket is respectively in abutting connection with the explosion-proof screw cap and the metal ring.
  5. 5. The bipolar battery cell structure capable of being filled with liquid and explosion-proof according to claim 4 is characterized in that the sealing ring is a U-shaped sealing ring, an opening of the U-shaped sealing ring faces the explosion-proof nut, and a first groove matched with the through hole screw is formed in one side, close to the core, of the U-shaped sealing ring.
  6. 6. The explosion-proof bipolar battery cell structure capable of being filled with liquid according to claim 5, wherein the first groove is arranged around the through hole screw and is arranged in a matching way with the through hole screw; The metal ring is provided with a second groove matched with the first groove, the second groove is respectively matched with the first groove and the through hole screw, the first groove is coated on the outer side of the second groove, and the through hole screw is communicated with the sealing cavity after sequentially penetrating through the second groove and the first groove.
  7. 7. The bipolar battery cell structure capable of being filled with liquid and explosion-proof according to claim 6, wherein a third groove is further formed in the metal ring, the explosion-proof screw cap and the sealing gasket are contained in the third groove, and the explosion-proof screw cap and the sealing gasket are respectively arranged in a matching mode with the third groove.
  8. 8. The liquid-injectable explosion-proof bipolar battery cell structure according to claim 3, wherein the explosion-proof nut is connected with the through hole screw through threads; The explosion-proof nut is provided with a polygonal groove, and the bottom of the polygonal groove is provided with an explosion-proof notch.
  9. 9. The bipolar battery cell structure capable of being filled with liquid and explosion-proof according to claim 2, wherein the side face of the metal ring is provided with a convex edge, the convex edge is circumferentially arranged on the side face of the metal ring, and the metal ring is a luer ring or a stainless steel ring.
  10. 10. The bipolar battery cell structure capable of being filled with liquid and explosion-proof according to claim 2, wherein the core body comprises an insulating ring, a first pole piece, a second pole piece and a diaphragm, wherein the insulating ring is sleeved on the outer side of the diaphragm, the first pole piece is abutted with one side surface of the diaphragm, the second pole piece is abutted with the other side surface of the diaphragm, and the insulating ring is sleeved on the outer sides of the first pole piece and the second pole piece; The first pole piece is in abutting connection with the first current collector, and the second pole piece is in abutting connection with the second current collector.
  11. 11. The bipolar battery cell structure capable of being filled with liquid and explosion-proof according to claim 10 is characterized in that round holes communicated with the through hole screws are formed in the insulating ring, fourth grooves communicated with the round holes are formed in two sides of the insulating ring, a plurality of notches are formed in one side, away from the sealing ring, of each fourth groove, and the notches are arranged at equal intervals.
  12. 12. The bipolar battery cell structure capable of being filled with liquid and explosion-proof according to claim 10, wherein the first pole piece is a positive pole piece and the second pole piece is a negative pole piece; The first current collector is abutted with the first end plate, the second current collector is abutted with the second end plate, one side face of the first current collector is coated with a first coating, the other side face of the first current collector is coated with a second coating, one side face of the second current collector is coated with the first coating, and the other side face of the second current collector is coated with the second coating.
  13. 13. The liquid-injectable and explosion-proof bipolar battery cell structure according to claim 12, wherein, The first coating is a positive electrode coating, the second coating is a negative electrode coating, or the first coating is a negative electrode coating, the second coating is a positive electrode coating, and the area of the positive electrode coating is smaller than that of the negative electrode coating; The first end plate, the second end plate, the first current collector, the second current collector, the sealing ring and the metal ring are respectively provided with a plurality of bolt holes matched with bolts, the plurality of bolt holes are circumferentially and uniformly arranged, and the bolts are fixed in the bolt holes; when a plurality of battery core units are arranged, the adjacent battery core units are connected in series, and the two adjacent battery core units share one of the first current collector and the two adjacent battery core units share one of the second current collector.

Description

Can annotate explosion-proof bipolar electric core structure of liquid Technical Field The utility model relates to the technical field of batteries, in particular to a bipolar battery cell structure capable of injecting liquid and preventing explosion. Background With the rising and development of new energy, the application scenes of lithium batteries are more and more, but due to the lower voltage of single battery cells, the single battery cells are connected in series to form a battery pack for application in any application scene. The pole pieces applied in the traditional battery cell structure are generally pole pieces with the same polarity, the positive and negative sides of the pole pieces are of the same polarity (like positive polarity or negative polarity), and each pole piece is connected in parallel in a lamination mode, so that the capacity is improved, but no voltage can be improved. Moreover, the traditional battery cell structure generally realizes liquid injection by arranging a liquid injection hole on the top cover, so that the battery cell is easy to infiltrate unevenly to influence the service performance of the battery cell. Disclosure of utility model Based on the above, the utility model provides a bipolar battery cell structure capable of injecting liquid and explosion-proof, and aims to solve the problems that the use performance of the battery cell is affected, the explosion-proof safety performance of the battery cell is low, the preparation cost is high and the like due to uneven infiltration of the battery cell caused by the mode that the existing bipolar battery cell is injected with liquid through a top cover. In order to achieve the purpose, the embodiment of the utility model provides a bipolar battery cell structure capable of injecting liquid and explosion prevention, which comprises a first end plate, at least one battery cell unit and a second end plate, wherein the battery cell unit is arranged between the first end plate and the second end plate; the battery cell unit comprises a first current collector, a core body, a metal ring sealing ring and a second current collector, wherein the first current collector, the metal ring sealing ring and the second current collector are sequentially stacked to form a sealing cavity, the metal ring sealing ring is sleeved on the outer side of the core body, and the core body is respectively abutted with the first current collector and the second current collector; the metal ring sealing ring is provided with at least one explosion-proof liquid injection hole, and the explosion-proof liquid injection hole is communicated with the sealing cavity. The anti-explosion liquid injection hole is arranged in the metal ring, and extends from one side of the metal ring to the other side of the metal ring. In the preferred embodiment, a through hole screw is arranged in the explosion-proof liquid injection hole, one end of the through hole screw, which is close to the core body, is communicated with the sealing cavity, and an explosion-proof screw cap is arranged at one end of the through hole screw, which is far away from the core body. In the preferred embodiment, a sealing gasket is arranged at one end of the through hole screw close to the explosion-proof screw cap, the sealing gasket is sleeved on the through hole screw, and the sealing gasket is respectively abutted with the explosion-proof screw cap and the metal ring. In the preferred implementation mode, the through hole screw is matched with the explosion-proof liquid injection hole, the through hole screw is respectively matched with the explosion-proof screw cap and the sealing washer, and the metal ring is matched with the sealing ring. The sealing ring is a U-shaped sealing ring, an opening of the U-shaped sealing ring faces the explosion-proof screw cap, and a first groove matched with the through hole screw is formed in one side, close to the core, of the U-shaped sealing ring. As a preferred embodiment, the first groove is disposed around the through hole screw, and the first groove is disposed in a manner of being matched with the through hole screw. The metal ring is provided with a second groove matched with the first groove, the second groove is respectively matched with the first groove and the through hole screw, the first groove is coated on the outer side of the second groove, and the through hole screw is communicated with the sealing cavity after sequentially penetrating through the second groove and the first groove. As the preferred implementation mode, still be provided with the third recess on the metal ring, explosion-proof nut sealing washer all holding in the third recess, just explosion-proof nut sealing washer respectively with third recess looks adaptation sets up. In a preferred embodiment, the explosion-proof nut is screwed with the through-hole screw. In the preferred embodiment, the explosion-proof screw cap is provided with a polygonal groove, and