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CN-224232865-U - Battery device, energy storage system and charging network

CN224232865UCN 224232865 UCN224232865 UCN 224232865UCN-224232865-U

Abstract

The embodiment of the application discloses a battery device, an energy storage system and a charging network. The battery device comprises a plurality of battery units, a discharge pipeline, a heat insulating piece and a heat insulating piece, wherein a pressure release mechanism is arranged on the wall portion of the shell of each battery unit, the discharge pipeline comprises a gas collecting pipe, the gas collecting pipe comprises a first area and a plurality of second areas, the first area and the second area are arranged opposite to each other along the thickness direction of the wall portion, the second areas are second through holes or weak areas, the second areas are in one-to-one correspondence with the pressure release mechanisms of the battery units, and accordingly discharged matters discharged by the pressure release mechanisms enter the gas collecting pipe through the second areas. The battery device, the energy storage system and the charging network can improve the reliability and stability of the battery device.

Inventors

  • LI JIAQI
  • WANG LEI
  • LI ZHONGHONG
  • ZHANG KAIWEN
  • ZHAO DANMIN

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250403

Claims (20)

  1. 1. A battery device, characterized by comprising: a plurality of battery cells (20), wherein a pressure release mechanism (213) is arranged on a wall part (201) of a shell (21) of each battery cell (20); The exhaust pipeline (12), the exhaust pipeline (12) comprises a gas collecting pipe (1201), the gas collecting pipe comprises a first area (121) and a plurality of second areas (122), the first area (121) and the second areas (122) are oppositely arranged along the thickness direction of the wall part (201), the second areas (122) are second through holes or weak areas, the second areas (122) are in one-to-one correspondence with the pressure release mechanisms (213) of the battery cells (20), and the discharged matters discharged by the pressure release mechanisms (213) enter the gas collecting pipe (1201) through the second areas (122); -a thermal insulation (13), said thermal insulation (13) covering said first area (121).
  2. 2. The battery device according to claim 1, characterized in that the heat insulator (13) is located inside the header (1201).
  3. 3. The battery device according to claim 2, wherein the first region (121) corresponds to a plurality of the second regions (122), or The gas collecting tube (1201) comprises a plurality of first areas (121), the first areas (121) and the second areas (122) are in one-to-one correspondence, the battery device comprises a plurality of heat insulating pieces (13), and the heat insulating pieces (13) and the first areas (121) are in one-to-one correspondence.
  4. 4. A battery device according to claim 3, characterized in that the header (1201) comprises a first wall (123), the first wall (123) comprising the first region (121), the first wall (123) being provided with a recess (1231) opening towards the second region (122), the thermal insulation (13) being housed within the recess (1231).
  5. 5. The battery device according to claim 2, wherein the gas collecting tube (1201) comprises intersecting first and second walls (123, 124), the first wall (123) comprising the first region (121), the thermal shield (13) comprising an intersecting body portion (131) and an extension (132), the body portion (131) being adapted to cover the first region (121) of the first wall (123), the extension (132) being adapted to cover at least part of the region of the second wall (124).
  6. 6. The battery device according to claim 5, wherein the header (1201) comprises two of the second walls (124) disposed opposite each other, and the heat insulator (13) comprises two of the extensions (132) disposed opposite each other.
  7. 7. The battery device according to claim 2, characterized in that the shape of the heat insulating member (13) is the same as the shape of the gas collecting tube (1201), the heat insulating member (13) being provided with a relief hole (133), the relief hole (133) being for relieving the second region (122).
  8. 8. The battery device according to claim 7, wherein the heat insulating member (13) is provided with a plurality of the escape holes (133), and the plurality of the escape holes (133) are in one-to-one correspondence with the plurality of the second regions (122).
  9. 9. The battery device according to claim 1, wherein the header (1201) comprises a first wall (123), the first wall (123) comprising the first region (121), the first region (121) being a first through hole (1232).
  10. 10. The battery device according to claim 9, characterized in that at least a partial area of the heat insulating member (13) is accommodated in the first through hole (1232).
  11. 11. The battery device according to claim 9, wherein the first through hole (1232) corresponds to the plurality of second regions (122), and the first through hole (1232) penetrates the first wall (123) in the arrangement direction of the plurality of second regions (122).
  12. 12. The battery device according to claim 9, wherein the first wall (123) includes a plurality of the first through holes (1232), the plurality of the first through holes (1232) are in one-to-one correspondence with the plurality of the second regions (122), the battery device includes a plurality of the heat insulators (13), and the plurality of the heat insulators (13) are in one-to-one correspondence with the plurality of the first through holes (1232).
  13. 13. The battery device according to claim 12, wherein a maximum length of an edge region of the heat insulating member (13) is greater than a maximum length of a middle region of the heat insulating member (13) in an arrangement direction of the plurality of second regions (122), a maximum length of an edge region of the first through hole (1232) is greater than a maximum length of a middle region of the first through hole (1232), and a maximum length of a surface of the first through hole (1232) facing the inside of the gas collecting tube (1201) is greater than a maximum length of a surface of the first through hole (1232) facing the outside of the gas collecting tube (1201).
  14. 14. The battery device according to any one of claims 1 to 13, characterized in that the material of the gas collector (1201) is different from the material of the heat insulator (13).
  15. 15. The battery device according to any one of claims 1 to 13, wherein the gas collector (1201) is plastic and the heat insulator (13) is a sheet metal part.
  16. 16. The battery device according to any one of claims 1 to 13, characterized in that the material of the header (1201) and/or the material of the heat insulator (13) fulfils at least one of the following conditions: The melting point is within the range of [350 ℃ and 650 ℃; The value range of the volume resistivity is 10 15 Ω·cm,10 16 Ω cm; The dielectric strength is in the range of [25kV/mm,55kV/mm ], and The flame retardant rating is UL 94V 0.
  17. 17. The battery device according to any one of claims 1 to 13, wherein the discharge line (12) further comprises a plurality of connection pipes (1202), each connection pipe (1202) being arranged between a corresponding pressure relief mechanism (213) and a second region (122) such that the discharge discharged by the pressure relief mechanism (213) enters the gas collection pipe (1201) through the connection pipe (1202) and the second region (122).
  18. 18. The battery device according to claim 17, wherein each of the connection pipes (1202) includes a first stopper portion (215) and a second stopper portion (14), The first limiting part (215) surrounds the pressure release mechanism (213) and is arranged on the outer surface of the battery cell (20); The second limiting part (14) is arranged around the second area (122), the second area (122) is the second through hole, and the first limiting part (215) and the second limiting part (14) are mutually matched to form the connecting pipe (1202).
  19. 19. An energy storage device, comprising: A plurality of battery devices according to any one of claims 1 to 18 for storing or providing electrical energy.
  20. 20. An energy storage system, comprising: A power conversion device (2); The energy storage device of claim 19, the power conversion device (2) being adapted to electrically connect a power generation device (3) and the energy storage device.

Description

Battery device, energy storage system and charging network Technical Field The present application relates to the field of batteries, and more particularly to a battery device, an energy storage system, and a charging network. Background With the continuous progress of battery technology, various new energy industries using battery devices as energy storage devices have been rapidly developed. In addition to improving the performance of the battery device, the stability problem of the battery device is a non-negligible problem in the development of battery technology. In the case of thermal runaway of the battery cells in the battery device, how to reduce the influence of the emissions of the battery cells on the components in the battery device is a technical problem to be solved in the battery technology. Disclosure of utility model The embodiment of the application provides a battery device, an energy storage system and a charging network, which can improve the reliability and stability of the battery device. The first aspect provides a battery device, which comprises a plurality of battery units, a discharge pipeline, a heat insulation piece and a heat insulation piece, wherein the wall part of the shell of each battery unit is provided with a pressure relief mechanism, the discharge pipeline comprises a gas collecting pipe, the gas collecting pipe comprises a first area and a plurality of second areas, the first area and the second area are oppositely arranged along the thickness direction of the wall part, the second areas are second through holes or weak areas, the second areas are in one-to-one correspondence with the pressure relief mechanisms of the battery units, so that discharged materials discharged by the pressure relief mechanisms enter the gas collecting pipe through the second areas, and the heat insulation piece covers the first area. Therefore, in the battery device according to the embodiment of the application, in the case that thermal runaway occurs in the battery cell, the pressure release mechanism is actuated, and the battery cell discharges the exhaust through the pressure release mechanism, and the exhaust passes through the second region and enters the gas collecting tube of the exhaust pipeline. When the high-temperature and high-pressure emission enters the gas collecting tube, the high-temperature and high-pressure emission is emitted towards the first area opposite to the second area under high-pressure impact, the heat insulation piece can block the emission, the risk that the emission leaks to the outside of the emission pipeline from the first area is reduced, the emission can be collected and directionally emitted through the gas collecting tube of the emission pipeline, and the influence of the high-temperature and high-pressure emission on other parts of the battery device is reduced. For example, considering that conductive particles may be included in the high temperature and high pressure emissions, these particles may cause short circuits between various components within the battery device, thereby causing further fires or explosions. Therefore, the leakage of the discharged materials to the outside of the discharge pipeline is reduced, the further influence on the battery device can be reduced, the explosion risk is reduced, and the reliability and the stability of the battery device are improved. In some embodiments, when the high-temperature and high-pressure emission is discharged towards the first area, the heat insulation part covers the first area, so that the risk that the emission is melted through the first area under the barrier action of the heat insulation part can be reduced, the risk that the emission leaks to the outside of the emission pipeline is reduced, and the emission can be collected and directionally discharged through the gas collecting pipe of the emission pipeline, so that the influence of the high-temperature and high-pressure emission on other parts of the battery device is reduced. In some embodiments, the first region corresponds to a plurality of second regions, and correspondingly, the heat insulating member extends along the arrangement direction of the plurality of second regions so as to cover the first region, so that the number of the heat insulating members is reduced, the assembly between the heat insulating member and the gas collecting tube is simplified, and the processing efficiency of the battery device is improved. In some embodiments, the gas collecting tube comprises a plurality of first areas, the first areas are in one-to-one correspondence with the second areas, the battery device comprises a plurality of heat insulating pieces, and the heat insulating pieces are in one-to-one correspondence with the first areas. This may reduce the area of the area covered by the insulating member, for example, the area between the plurality of first areas in the gas collecting tube may not be covered by the insulating member, th