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CN-122000606-A - Soft package battery pack and power consumption device

CN122000606ACN 122000606 ACN122000606 ACN 122000606ACN-122000606-A

Abstract

The invention belongs to the technical field of batteries, and discloses a soft package battery pack and an electric device, wherein the soft package battery pack comprises at least two batteries, an end plate and a partition plate, the at least two batteries are arranged along a first direction, each battery comprises a shell, the shell comprises a first shell part and a second shell part which are oppositely arranged, and a sealing edge for sealing and connecting the first shell part and the second shell part is arranged at the position, facing the end plate, of the shell; the end plate is arranged at least one end of the battery along a second direction, the second direction is perpendicular to the first direction, at least one through hole is formed in the end plate, the through hole is opposite to at least one sealing edge, the isolation plate is arranged between the end plate and the sealing edge, and the isolation plate is provided with a weak part opposite to the through hole. The soft package battery pack can improve the pressure release rate when the battery is out of control, realize the outside directional pressure release of the soft package battery pack, and ensure that the outside vapor and foreign matters of the soft package battery pack can not enter the inside of the soft package battery pack, thereby realizing the insulation safety of the soft package battery pack.

Inventors

  • LI XINJIAN
  • ZHANG YONGJIE

Assignees

  • 中创新航科技集团股份有限公司

Dates

Publication Date
20260508
Application Date
20260204

Claims (20)

  1. 1. The soft package battery pack is characterized by comprising at least two batteries, end plates and a separation plate, wherein the at least two batteries are arranged along a first direction, each battery comprises a shell, each shell comprises a first shell part and a second shell part which are oppositely arranged, and sealing edges for sealing and connecting the first shell part and the second shell part are arranged at positions, facing the end plates, of the shells; The end plate is arranged at least one end of the battery along a second direction, the second direction is the length direction of the battery, the second direction is perpendicular to the first direction, at least one through hole is formed in the end plate, and the through hole is opposite to at least one sealing edge; The separator is provided between the end plate and the sealing edge, and has a weak portion provided opposite to the through hole, the weak portion having a size smaller than that of the through hole.
  2. 2. The pouch battery of claim 1, wherein the weak portion comprises a score formed on the separator, the score extending in the first direction and being disposed in correspondence with the sealing edges of at least two of the cells.
  3. 3. The pouch battery pack according to claim 1, wherein the weak portion includes a slit formed on the separator, a dimension h1 of the slit in a third direction, which is perpendicular to both the first direction and the second direction, is smaller than a dimension h2 of the through-hole in the third direction.
  4. 4. The flexible battery pack according to claim 3, wherein h1 and h2 satisfy the relation h2mm-h1 mm≥6 mm.
  5. 5. The flexible battery pack according to any one of claims 1 to 4, wherein a shortest distance d1mm between the weak portion and the sealing edge in the second direction, the weak portion has a dimension L1mm in the first direction, d1 and L1 satisfy the relation 250 ∈d1×l1 ∈4000.
  6. 6. The flexible battery pack according to any one of claims 1 to 4, wherein the weak portion has a dimension L1mm in the first direction, the through hole has a dimension L2mm in the first direction, and L1 and L2 satisfy the relation of L1mm-L2mm < 10mm.
  7. 7. The pouch battery of any of claims 1-4, wherein a dimension of an individual of the weaknesses along the first direction ranges from 50mm to 200mm.
  8. 8. The flexible battery pack according to any one of claims 1 to 4, wherein the number of the weak portions is at least two when the thickness of the battery is 10mm or more, and at least two of the weak portions are spaced apart in the first direction.
  9. 9. The pouch pack of claim 8, wherein the distance between adjacent two of the weak portions is 40mm to 80mm.
  10. 10. The pouch battery of claim 8, wherein the weakened portions are offset from a centerline of the separator extending in the first direction.
  11. 11. The pouch battery of claim 10, wherein a distance L3mm between the weak portion and a center line of the separator extending in the first direction is 20mm to 40mm.
  12. 12. The flexible battery pack of any one of claims 1-4, wherein at least one end of the weakened portion in the first direction is spaced from an end of the separator in the first direction.
  13. 13. The flexible battery pack according to any one of claims 1 to 4, wherein the separator is an insulating plate having a thickness smaller than that of the end plate.
  14. 14. The pouch battery of claim 12, wherein the separator has a thickness of 50 μm to 300 μm.
  15. 15. The pouch battery of any of claims 1-4, wherein a shortest distance d1mm of the frangible portion from the sealing edge in the second direction is in the range of 5mm to 20mm.
  16. 16. The flexible battery pack according to any one of claims 1 to 4, wherein the through-hole has a dimension of 5mm to 20mm in a third direction, the third direction being perpendicular to both the first direction and the second direction.
  17. 17. The flexible battery pack according to any one of claims 1 to 4, wherein the through-holes are provided in plurality at intervals along the first direction.
  18. 18. The flexible battery pack according to any one of claims 1 to 4, wherein the through-holes are provided at intervals from the weak portion in the second direction, and the interval ranges from 2mm to 10mm.
  19. 19. The flexible battery pack according to any one of claims 1 to 4, wherein the case includes an outer insulating layer, a metal layer, and an inner insulating layer, the metal layer being disposed between the outer insulating layer and the inner insulating layer, the inner insulating layer of the first case portion being adhesively connected with the outer insulating layer of the second case portion to form a sealing edge.
  20. 20. The pouch battery of claim 19, wherein the sealing edge has a dimension in the second direction of 30mm or less and the frangible portion has a dimension in the first direction of 60mm or more.

Description

Soft package battery pack and power consumption device Technical Field The invention relates to the technical field of batteries, in particular to a soft package battery pack and an electric device. Background The flexible battery is widely applied to the field of new energy batteries due to the advantages of flexible size, higher assembly efficiency and the like, however, the existing flexible battery is difficult to set an explosion-proof valve for directional pressure relief due to the fact that the shell is made of plastic-aluminum film materials, so that the risk of abnormal pressure relief exists in the battery shell, and the exhaust is unsmooth after the pressure relief of the battery, the use safety of adjacent batteries or other electrical elements inside the battery is affected, and severe thermal runaway of the battery is initiated. Disclosure of Invention The invention provides a soft-package battery pack and an electric device, wherein the soft-package battery pack can improve the pressure release rate when the battery is out of control, realize the external directional pressure release of the soft-package battery pack, ensure that water vapor and foreign matters outside the soft-package battery pack cannot enter the soft-package battery pack, and realize the insulation safety of the soft-package battery pack. To achieve the purpose, the invention adopts the following technical scheme: The soft package battery pack comprises at least two batteries, an end plate and a separation plate, wherein the at least two batteries are arranged along a first direction, each battery comprises a shell, the shell comprises a first shell part and a second shell part which are oppositely arranged, a sealing edge used for sealing and connecting the first shell part and the second shell part is arranged at the position, facing the end plate, of the shell, the end plate is arranged at least one end, along a second direction, of each battery, the second direction is perpendicular to the first direction, at least one through hole is formed in the end plate, the through hole and at least one sealing edge are oppositely arranged, the separation plate is arranged between the end plate and the sealing edge, and the separation plate is provided with a weak part which is oppositely arranged with respect to the through hole. An electrical device comprising at least one soft pack battery pack as hereinbefore described. The invention has the beneficial effects that at least two batteries are arranged along the first direction, so that the sealing edges on the shells of the batteries face the same end plate, and the heat influence among the batteries is reduced. Because the through holes are formed in the end plates, the isolating plate is provided with the weak part, when the battery is cracked under the action of high-temperature gas, the weak part can be broken through to be discharged out of the end plates from the through holes, so that the pressure release rate of the battery when the battery is in thermal runaway is improved, and the external directional pressure release of the soft-package battery pack is realized. Due to the existence of the isolation plate, water vapor and foreign matters outside the soft-package battery pack can be well prevented from entering the soft-package battery pack through the through holes of the end plates, so that the insulation safety of the soft-package battery pack is realized, and the protection of the battery is better realized. Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Drawings Fig. 1 is a schematic view of a structure of a pouch battery according to an embodiment of the present invention; fig. 2 is an exploded view of a pouch pack battery pack according to an embodiment of the present invention; FIG. 3 is a schematic view of the structure of the end plate shown in FIG. 2; FIG. 4 is a schematic view of the structure of the separator shown in FIG. 2; FIG. 5 is a schematic partial cross-sectional view of a pouch battery pack according to an embodiment of the present invention; Fig. 6 is a schematic view of the structure of a battery according to an embodiment of the present invention; FIG. 7 is a schematic view of a second end plate configuration according to an embodiment of the present invention; FIG. 8 is a schematic view of a spacer plate corresponding to FIG. 7; FIG. 9 is a schematic view of a second end plate configuration according to an embodiment of the present invention; FIG. 10 is a schematic view of the structure of the spacer correspondingly mated with FIG. 9; reference numerals: 100. 110, case, 111, first case portion, 112, second case portion, 113, sealing edge, 200, end plate, 210, through hole, 300, separator, 310, weak portion, 400, case, 410, bottom plate, 420, and cover plate. Detailed Description The