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CN-224232857-U - Smoke exhaust flow guiding device, battery and electric equipment

CN224232857UCN 224232857 UCN224232857 UCN 224232857UCN-224232857-U

Abstract

The application relates to a smoke exhaust flow guiding device, a battery and electric equipment. The smoke exhaust guide device comprises a smoke exhaust guide cover, wherein the smoke exhaust guide cover is used for being in sealing connection with a box body of a battery, the smoke exhaust guide cover corresponds to an explosion-proof valve of the battery one by one, the smoke exhaust guide cover comprises a contraction section and a first expansion section which are sequentially connected and communicated along the axial direction of the smoke exhaust guide cover, the cross section area of the contraction section is gradually reduced, and the cross section area of the first expansion section is gradually increased in the axial direction of the smoke exhaust guide cover. The smoke exhaust flow guiding device, the battery and the electric equipment can reduce potential safety hazards.

Inventors

  • SUN SHIQIANG
  • SHU YANG
  • LIU YONG
  • FENG ZE

Assignees

  • 兰钧新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (10)

  1. 1. The smoke exhaust flow guiding device is characterized by comprising a smoke exhaust flow guiding cover (10), wherein the smoke exhaust flow guiding cover (10) is used for being in sealing connection with a box body of a battery, and the smoke exhaust flow guiding cover (10) corresponds to explosion-proof valves (300) of the battery one by one; The smoke exhaust guide cover (10) comprises a shrinkage section (11) and a first expansion section (13) which are sequentially connected and communicated along the axial direction (X) of the smoke exhaust guide cover (10), the cross-sectional area of the shrinkage section (11) is gradually reduced, and the cross-sectional area of the first expansion section (13) is gradually increased.
  2. 2. The smoke deflector according to claim 1, wherein the smoke deflector (10) further comprises a throat section (12), the throat section (12) being connected and communicating between the constriction section (11) and the first expansion section (13); The minimum cross-sectional area of the contraction section (11) is S1, the cross-sectional area of the throat section (12) is S2, the minimum cross-sectional area of the first expansion section (13) is S3, S2 is less than or equal to S1, and S2 is less than or equal to S3.
  3. 3. The smoke deflector according to claim 2, further comprising a plurality of heat radiating fins (20), all of the heat radiating fins (20) being arranged in the first expansion section (13) at intervals in a direction intersecting the axial direction (X) of the smoke deflector (10) and forming a plurality of smoke channels (15) within the first expansion section (13) separately.
  4. 4. A smoke deflector according to claim 3, characterized in that the inner walls of the throat section (12) and the first expansion section (13) are both covered with a phase change material coating (30) and/or the outer surfaces of the heat radiating fins (20) are covered with a phase change material coating (30).
  5. 5. The smoke deflector according to claim 1, wherein the constriction section (11) comprises two first inclined plates (111) arranged opposite each other and two first straight plates (112) arranged opposite each other, any one of the two first inclined plates (111) of the constriction section (11) gradually approaches the other one of the two first inclined plates (111) in the axial direction (X) of the smoke deflector (10), and the included angle of the two first inclined plates (111) is α,55 ° +.α+≤65°, and the two first straight plates (112) of the constriction section (11) are both connected between the two first inclined plates (111).
  6. 6. The smoke deflector according to claim 5, characterized in that the constriction section (11) and the first expansion section (13) are arranged axisymmetrically.
  7. 7. The smoke deflector according to any one of claims 1 to 6, wherein the smoke deflector (10) further comprises a second expansion section (14), the second expansion section (14) being arranged at the head of the contraction section (11) facing away from the first expansion section (13) and being connected to and in communication with the contraction section (11), the cross-sectional area of the second expansion section (14) increasing gradually in the axial direction (X) of the smoke deflector (10).
  8. 8. The smoke deflector according to claim 7, wherein the second expansion section (14) comprises two second inclined plates (141) arranged opposite each other and two second straight plates (142) arranged opposite each other, any one of the two second inclined plates (141) is gradually separated from the other one of the two second inclined plates (141) in the axial direction (X) of the smoke deflector (10), and an included angle of the two second inclined plates (141) is β,40 ° - β -50 °, and the two second straight plates (142) are connected between the two second inclined plates (141).
  9. 9. A battery, comprising: the box body is provided with an explosion-proof valve port (210); An explosion-proof valve (300) corresponding to the explosion-proof valve ports (210) one by one, wherein the explosion-proof valve (300) is arranged on the corresponding explosion-proof valve port (210) in a penetrating way, and The smoke deflector according to any of the preceding claims, wherein the constriction (11) is directed towards the explosion-proof valve (300).
  10. 10. A powered device comprising a battery as claimed in claim 9.

Description

Smoke exhaust flow guiding device, battery and electric equipment Technical Field The application relates to the technical field of batteries, in particular to a smoke exhaust flow guiding device, a battery and electric equipment. Background At present, the new energy industry is rapidly developing, and along with the wide application of lithium ion batteries, the safety risk prevention awareness of people on the lithium batteries is also higher and higher. When thermal runaway occurs in the battery cell, high-temperature and high-pressure smoke released by the thermal runaway is rapidly accumulated in the box body of the battery, if pressure release is not timely carried out, the box body of the battery is easily broken by being not subjected to the high-temperature and high-pressure smoke, and the safety risk of deflagration is caused. Therefore, one or more explosion-proof valves are generally installed on the box body of the battery, and when the smoke gas with high temperature and high pressure in thermal runaway gathers to reach the opening pressure, the explosion-proof valves are opened to release, so that the air pressure in the battery is maintained within the bearable intensity range of the box body. However, when the high-temperature flue gas in thermal runaway is sprayed out from the pressure relief opening of the explosion-proof valve, open fire is easy to generate at the pressure relief opening of the explosion-proof valve, and a large potential safety hazard exists. Disclosure of utility model Accordingly, it is necessary to provide a smoke exhaust guiding device, a battery and electric equipment capable of reducing potential safety hazards. The smoke exhaust flow guiding device comprises smoke exhaust flow guiding hoods, wherein the smoke exhaust flow guiding hoods are used for being connected with a box body of a battery in a sealing mode, and the smoke exhaust flow guiding hoods correspond to explosion-proof valves of the battery one by one; The smoke exhaust guide cover comprises a contraction section and a first expansion section which are sequentially connected and communicated along the axial direction of the smoke exhaust guide cover, the cross section area of the contraction section is gradually reduced in the axial direction of the smoke exhaust guide cover, and the cross section area of the first expansion section is gradually increased. In some of these embodiments, the exhaust fume hood further comprises a throat section connected and in communication between the contracted section and the first expanded section; The minimum cross-sectional area of the contraction section is S1, the cross-sectional area of the throat section is S2, the minimum cross-sectional area of the first expansion section is S3, S2 is less than or equal to S1, and S2 is less than or equal to S3. In some embodiments, the smoke exhaust guiding device further comprises a plurality of radiating fins, all of which are arranged in the first expansion section at intervals along the direction intersecting with the axial direction of the smoke exhaust guiding cover, and a plurality of smoke exhaust channels are formed in the first expansion section in a separated mode. In some embodiments, the throat section and the inner wall of the first expansion section are both coated with a phase change material coating, and/or the outer surface of the radiating fin is coated with a phase change material coating. In some embodiments, the contraction section comprises two first inclined plates arranged oppositely and two first straight plates arranged oppositely, any one of the two first inclined plates of the contraction section gradually approaches to the other one of the two first inclined plates in the axial direction of the smoke exhaust guide cover, the included angle of the two first inclined plates is alpha, alpha is more than or equal to 55 degrees and less than or equal to 65 degrees, and the two first straight plates of the contraction section are connected between the two first inclined plates. In some of these embodiments, the contracted section and the first expanded section are disposed axisymmetrically. In some embodiments, the exhaust gas guide sleeve further comprises a second expansion section, the second expansion section is arranged at the head part of the contraction section, which is opposite to the first expansion section, and is connected and communicated with the contraction section, and the cross-sectional area of the second expansion section is gradually increased in the axial direction of the exhaust gas guide sleeve. In some embodiments, the second expansion section comprises two second inclined plates arranged oppositely and two second straight plates arranged oppositely, any one of the two second inclined plates is gradually far away from the other one of the two second inclined plates in the axial direction of the smoke exhaust guide cover, the included angle of the two second inclined plates is