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CN-224217660-U - Battery pack and power utilization device

CN224217660UCN 224217660 UCN224217660 UCN 224217660UCN-224217660-U

Abstract

The utility model relates to the technical field of batteries and discloses a battery pack and an electric device, wherein the battery pack comprises a box body, a battery monomer, an exhaust pipe and a sealing element, a cooling cavity, an exhaust cavity and a separation beam are arranged in the box body, and the separation beam separates the cooling cavity from the exhaust cavity and is equivalent to the layout of a compartment in the box body; the air inlet of the exhaust pipe is opposite to the explosion-proof valve of the battery unit, so that a directional exhaust path is established between the valve port of the explosion-proof valve and the air guide channel. And a sealing piece is arranged between the exhaust pipe and the explosion-proof valve, so that high-temperature eruption is allowed to smoothly enter the air duct, and is prevented from overflowing from a gap between the exhaust pipe and the battery cell to the cooling cavity, and insulating cooling liquid is prevented from reversely penetrating. The through hole is arranged on the separation beam, the through hole is communicated with the air outlet of the exhaust pipe, high-temperature eruption in the air guide channel flows into the independent exhaust cavity through the air outlet and the through hole, the case body deformation or rupture caused by the instantaneous pressure surge of the cooling cavity is effectively avoided, and the risk of sealing failure of the battery pack is obviously reduced.

Inventors

  • CUI YANGYANG
  • ZHANG MING
  • Zhou Qingwan
  • LUO ZHENG
  • WANG TIEFENG

Assignees

  • 欣旺达动力科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250516

Claims (10)

  1. 1. A battery pack having a third direction (Z), comprising: The box body (1), be equipped with cooling chamber (11), exhaust chamber (12) and separating beam (13) in the box body (1), separating beam (13) are located between cooling chamber (11) and exhaust chamber (12), with interval cooling chamber (11) with exhaust chamber (12); The battery unit (2) is positioned in the cooling cavity (11), and an explosion-proof valve (20) is arranged at one side of the battery unit (2) along the third direction (Z); The exhaust pipe (3), the exhaust pipe (3) is installed in the cooling cavity (11) and is arranged towards the explosion-proof valve (20), an air guide channel (30) and an air inlet (31) and an air outlet (32) which are communicated with the air guide channel (30) are arranged in the exhaust pipe (3), the air inlet (31) and the explosion-proof valve (20) are oppositely arranged in the third direction (Z), a through hole (130) is formed in the separation beam (13), and the through hole (130) is connected with the air outlet (32) so as to be communicated with the air guide channel (30) and the exhaust cavity (12); A seal (4) between the exhaust pipe (3) and the explosion-proof valve (20) to form a seal between the exhaust pipe (3) and the battery cell (2).
  2. 2. The battery pack according to claim 1, wherein the sealing member (4) includes a first sealing layer (41), the first sealing layer (41) covers a side of the exhaust pipe (3) close to the battery cell (2), and the first sealing layer (41) seals the air inlet (31).
  3. 3. The battery pack according to claim 2, wherein the seal (4) further comprises a second sealing layer (42), the second sealing layer (42) being provided between the first sealing layer (41) and the explosion-proof valve (20), the second sealing layer (42) being provided with perforations (420), the perforations (420) being arranged opposite the explosion-proof valve (20) in the third direction (Z).
  4. 4. The battery pack according to claim 1, wherein the sealing member (4) is an integral sealing layer (43), a weak portion (430) is arranged on one side of the sealing member (4) close to the battery cell (2), the weak portion (430) is arranged opposite to the explosion-proof valve (20) in the third direction (Z), and the weak portion (430) is arranged in a sealing manner with the air inlet (31).
  5. 5. The battery pack according to claim 1, further comprising a first direction (X) and a second direction (Y), wherein the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other, the cooling cavity (11) and the exhaust cavity (12) are arranged at intervals along the first direction (X), the partition beam (13) extends along the second direction (Y), the exhaust pipe (3) extends along the first direction (X), a connecting portion (33) is arranged at an end portion of the exhaust pipe (3) close to the air outlet (32), and the connecting portion (33) is connected with the partition beam (13).
  6. 6. The battery pack according to claim 5, further comprising a switching structure (5) arranged between the exhaust pipe (3) and the partition beam (13), wherein a switching channel (50) is arranged in the switching structure (5), a first interface (51) is arranged on one side of the switching structure (5) facing the connecting part (33) along the third direction (Z), a second interface (52) is arranged on one side of the switching structure (5) facing the partition beam (13) along the first direction (X), and the switching channel (50) is respectively communicated with the first interface (51) and the second interface (52); The first interface (51) is communicated with the air outlet (32), and the second interface (52) is communicated with the through hole (130).
  7. 7. The battery pack according to claim 6, wherein the connecting portion (33) is an ear plate structure, the connecting portion (33) is connected with the adapting structure (5) through a fastener (35), and a glue layer (34) is provided between the connecting portion (33) and the adapting structure (5).
  8. 8. The battery pack according to claim 1, wherein the case (1) comprises side beams (14), a cover plate (15) and a bottom plate (16), the cover plate (15) and the bottom plate (16) are arranged at intervals along the third direction (Z), the side beams (14) are fixedly connected with the cover plate (15) and the bottom plate (16) respectively, the exhaust pipe (3) is provided with a first side surface (36) far away from the battery cell (2), and the first side surface (36) is fixedly connected with the cover plate (15).
  9. 9. The battery pack according to claim 8, wherein the exhaust pipe (3) is arranged on one side of the cover plate (15) close to the cooling cavity (11) in a fitting manner, the exhaust pipe (3) is further provided with a second side surface (37) arranged close to the battery cell (2), and the second side surface (37) is in sealing connection with the end surface of the battery cell (2) in the third direction (Z).
  10. 10. An electrical device comprising a battery pack according to any one of claims 1 to 9.

Description

Battery pack and power utilization device Technical Field The utility model relates to the technical field of batteries, in particular to a battery pack and an electric device. Background At present, immersion cooling is a novel battery thermal management technology, and the purposes of efficient heat dissipation and safety protection are achieved by fully immersing battery monomers or modules in insulating cooling liquid. Although the conventional immersed battery pack has unique advantages in terms of thermal safety, when thermal runaway occurs in the battery cell, high-temperature and high-pressure substances can be instantaneously sprayed out, so that the pressure of an immersion space in the battery pack is rapidly increased, and the sprayed substances generated by the thermal runaway cannot be discharged out of the immersion space. Problems such as failure of the immersion space seal, leakage of insulating coolant, and possible influence of high-temperature eruption on surrounding battery cells are liable to occur. In summary, when thermal runaway occurs in the existing immersed battery pack, the high-temperature spray cannot be guided out of the immersion space, the pressure of the immersion space is too high, and the problems of sealing failure, leakage of insulating cooling liquid, reduced thermal safety protection performance and the like exist. Disclosure of utility model The utility model aims to solve the technical problems that when the existing immersed battery pack is out of control, high-temperature eruption cannot be guided out of an immersion space, the pressure of the immersion space is too high, and the problems of sealing failure, leakage of insulating cooling liquid, reduced thermal safety protection performance and the like exist. In order to solve the technical problems, the utility model provides a technical scheme of a battery pack: A battery pack having a third orientation, comprising: The box body is internally provided with a cooling cavity, an exhaust cavity and a separation beam, and the separation beam is positioned between the cooling cavity and the exhaust cavity to separate the cooling cavity from the exhaust cavity; The battery unit is positioned in the cooling cavity, and an explosion-proof valve is arranged on one side of the battery unit along the third direction; The exhaust pipe is arranged in the cooling cavity and is arranged towards the explosion-proof valve, an air guide channel, an air inlet and an air outlet which are communicated with the air guide channel are arranged in the exhaust pipe, and the air inlet and the explosion-proof valve are oppositely arranged in the third direction; And a sealing member between the exhaust pipe and the explosion-proof valve to form a seal between the exhaust pipe and the battery cell. Further, the sealing member includes a first sealing layer that covers a side of the exhaust pipe near the battery cell, and the first sealing layer seals the air inlet. Further, the sealing member further comprises a second sealing layer, the second sealing layer is arranged between the first sealing layer and the explosion-proof valve, the second sealing layer is provided with a perforation, and the perforation and the explosion-proof valve are oppositely arranged in the third direction. Further, the sealing member is an integrated sealing layer, a weak part is arranged on one side, close to the battery cell, of the sealing member, the weak part and the explosion-proof valve are oppositely arranged in the third direction, and the weak part and the air inlet are arranged in a sealing mode. Further, the battery pack is further provided with a first direction and a second direction, the first direction, the second direction and the third direction are perpendicular to each other, the cooling cavity and the exhaust cavity are arranged at intervals along the first direction, the separation beam extends along the second direction, the exhaust pipe extends along the first direction, a connecting portion is arranged at the end portion, close to the air outlet, of the exhaust pipe, and the connecting portion is connected with the separation beam. Further, the battery pack further comprises a switching structure arranged between the exhaust pipe and the separation beam, a switching channel is arranged in the switching structure, a first interface is arranged on one side, facing the connecting part, of the switching structure along the third direction, a second interface is arranged on one side, facing the separation beam, of the switching structure along the first direction, and the switching channel is respectively communicated with the first interface and the second interface; The first interface is communicated with the air outlet, and the second interface is communicated with the through hole. Further, the connecting portion is an ear plate structure, the connecting portion is connected with the switching structure through a fastener, and a glue la