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CN-224232866-U - Battery device, energy storage system and charging network

CN224232866UCN 224232866 UCN224232866 UCN 224232866UCN-224232866-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 and a buffer part, wherein the battery units are provided with pressure release mechanisms, the discharge pipeline is provided with a plurality of pressure release holes which are in one-to-one correspondence with the pressure release mechanisms of the battery units, so that the discharged matters discharged from the pressure release mechanisms enter the discharge pipeline through the pressure release holes and are discharged through the discharge pipeline, and the discharge pipeline comprises the buffer part. 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
  • ZHANG KAIWEN
  • LI ZHONGHONG

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250403

Claims (18)

  1. 1. A battery device, characterized by comprising: a plurality of battery cells (20), the battery cells (20) being provided with a pressure release mechanism (213); A discharge pipe (12), the discharge pipe (12) is provided with a plurality of pressure release holes (1221) corresponding to the pressure release mechanisms (213) of a plurality of battery cells (20) one by one, so that the discharged matter discharged from the pressure release mechanisms (213) enters the discharge pipe (12) through the pressure release holes (1221) and is discharged through the discharge pipe (12), and the discharge pipe (12) includes a buffer portion (121).
  2. 2. The battery device of claim 1, wherein the drain line (12) further comprises a straight portion (122), the pressure relief hole (1221) being located in the straight portion (122).
  3. 3. The battery device according to claim 2, wherein the buffer portion (121) comprises a groove structure (1211) close to the battery cell (20) with respect to the straight portion (122) and/or a protrusion structure (1212) remote from the battery cell (20) with respect to the straight portion (122).
  4. 4. The battery device according to claim 2, characterized in that the pressure relief hole (1221) is located in a first wall (123) of the discharge conduit (12), the first wall (123) being provided with the buffer (121).
  5. 5. The battery device according to claim 4, wherein the first wall (123) is provided with a plurality of the buffer portions (121), each buffer portion (121) corresponding to a region between two adjacent battery cells (20).
  6. 6. The battery device according to claim 5, wherein the first wall (123) includes a buffer portion (121) in one-to-one correspondence with a region between each adjacent two battery cells (20) among the plurality of battery cells (20).
  7. 7. The battery device according to claim 4, wherein the buffer portion (121) of the first wall (123) comprises a groove structure (1211) adjacent to the battery cell (20) with respect to the flat portion (122).
  8. 8. The battery device according to claim 4, wherein the discharge pipe (12) further includes a second wall (124) provided opposite to the first wall (123), the second wall (124) being provided with the buffer portion (121).
  9. 9. The battery device according to claim 8, wherein the buffer portion (121) of the second wall (124) is provided opposite to the buffer portion (121) of the first wall (123).
  10. 10. The battery device according to claim 8, wherein the buffer portion (121) of the second wall (124) comprises a groove structure (1211) adjacent to the battery cell (20) with respect to the flat portion (122).
  11. 11. The battery device according to claim 8, wherein the shape of the buffer portion (121) of the second wall (124) is the same as the shape of the buffer portion (121) of the first wall (123).
  12. 12. The battery device according to any one of claims 4 to 11, wherein the buffer portion (121) comprises a groove structure (1211) adjacent to the battery cell (20) with respect to the flat portion (122); Wherein the maximum length of the buffer part (121) is in the range of 2mm,200mm along the axial direction of the discharge pipeline (12), and/or, The maximum depth of the groove structure (1211) is in the range of [1mm,40mm ].
  13. 13. The battery device according to any one of claims 1 to 11, wherein a longitudinal section of the buffer portion (121) is in a circular arc shape or a folded line shape, wherein the longitudinal section of the buffer portion (121) is perpendicular to a width direction of the discharge duct (12).
  14. 14. The battery device according to any one of claims 1 to 11, wherein the pressure relief mechanism (213) is located at a top wall or a side wall of the battery cell (20) in the direction of gravity.
  15. 15. The battery device according to any one of claims 1 to 11, wherein the battery cell (20) is further provided with a first limiting portion (215), the first limiting portion (215) surrounding the pressure release mechanism (213) and being provided at an outer surface of the battery cell (20); the battery device further includes: The second limiting parts (14) are arranged in a one-to-one correspondence manner, the second limiting parts (14) are in one-to-one correspondence with the pressure relief holes (1221), each second limiting part (14) is arranged around the corresponding pressure relief hole (1221), and the first limiting parts (215) and the second limiting parts (14) are mutually matched, so that discharged matters discharged from the pressure relief mechanism (213) enter the discharge pipeline (12) through the pressure relief holes (1221).
  16. 16. An energy storage device, comprising: A plurality of battery devices according to any one of claims 1 to 15 for storing or providing electrical energy.
  17. 17. An energy storage system, comprising: A power conversion device (2); the energy storage device according to claim 16, the power conversion device (2) being adapted to electrically connect a power generation device (3) and the energy storage device.
  18. 18. A charging network, comprising: A charging pile (4); Energy storage device according to claim 16 or energy storage system according to claim 17 for providing electrical energy to the charging pile (4).

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 the development of battery technology, in addition to improving the performance of the battery device, how to improve the structural stability of the battery device during assembly and during use is also a non-negligible problem. 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. In a first aspect, a battery device is provided, including a plurality of battery cells provided with pressure relief mechanisms, and a drain line provided with a plurality of pressure relief holes in one-to-one correspondence with the pressure relief mechanisms of the plurality of battery cells, such that drain discharged from the pressure relief mechanisms enters the drain line through the pressure relief holes and is discharged through the drain line, the drain line including a buffer portion. 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 discharge through the pressure release mechanism, and the discharge enters the discharge pipe through the pressure release hole and is discharged through the discharge pipe. The same discharge pipeline corresponds to a plurality of battery monomers, and when any battery monomer in the battery monomers is out of control, the discharge of the battery monomers can be collected through the discharge pipeline, so that the structure is simplified, and the structural complexity of the battery device is reduced. In addition, in the assembly process of the battery device, the same discharge pipeline is considered to be arranged corresponding to a plurality of battery cells, and tolerance may exist among the plurality of battery cells in the length direction, the width direction or the height direction, so that the buffer part arranged through the discharge pipeline can absorb the part of tolerance, and the assembly efficiency of the battery device is improved. In the use of battery device, a plurality of battery monomers that same discharge pipeline corresponds probably take place to warp or shift, and the buffer portion that discharge pipeline set up can absorb this partial deflection, increases the rigidity of this discharge pipeline, makes it can be better bear the exogenic action, improves the bending resistance, anti extrusion ability or the anti vibration ability of discharge pipeline, reduces the discharge pipeline and damages even cracked risk because of the deformation, and then improves battery device's stability and reliability. In some embodiments, the discharge line further includes a flat portion, the pressure relief hole is located in the flat portion, so that the pressure relief hole is relatively flat, which is convenient for processing the pressure relief hole, and is convenient for improving tightness around the pressure relief hole, reducing risk of leakage of the discharge from around the pressure relief hole to outside of the discharge line, so that the discharge can be collected and directionally discharged through the discharge line, and reducing influence of the discharge of high temperature and high pressure on other components of the battery device. In some embodiments, the buffer portion includes a groove structure proximate the battery cell relative to the straight portion and/or a raised structure distal the battery cell relative to the straight portion. The buffer part comprises a groove structure and/or a bulge structure, is simple in structure and easy to process, is convenient to realize the absorption of the size difference between the battery monomers and the deformation, can improve the bending resistance, the extrusion resistance or the vibration resistance of the discharge pipeline, reduces the risk of damage and even breakage of the discharge pipeline due to deformation, and further improves the stability and the reliability of the battery device. In some embodiments, the pressure relief hole is located in a first wall of the discharge line, the first wall being provided with the buffer. Considering that a certain gap is usually formed between the discharge pipeline and the battery cell, a buffer part is arranged on the first wall where the pressure relief hole is formed, the buffer part can be arranged in a gap between the discharge pipeline and the battery cell, and the buffer part does not occupy additional space under the condition that the