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CN-122000498-A - Energy storage equipment

CN122000498ACN 122000498 ACN122000498 ACN 122000498ACN-122000498-A

Abstract

The invention belongs to the field of batteries, and particularly relates to energy storage equipment. The problem of there is the potential safety hazard after current energy storage equipment thermal runaway flue gas discharge is solved. The energy storage device comprises a fire protection safety system and a battery pack assembly, wherein the battery pack assembly comprises an explosion venting collecting pipe and a battery module, each battery module comprises a shell and a battery unit, each battery unit comprises a second hollow member and a plurality of single batteries, explosion venting parts of the single batteries are communicated based on the second hollow members, when any single battery in the shell is out of control, the out-of-control smoke breaks the explosion venting parts, and the explosion venting parts are discharged out of the shell from the second hollow members and enter the fire protection safety system to be processed, so that potential safety hazards generated after the out-of-control smoke is discharged are reduced.

Inventors

  • CHEN MENGQI
  • LEI ZHENGJUN

Assignees

  • 双澳储能科技（西安）有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (16)

  1. 1. An energy storage device is characterized by comprising a fire safety system and at least one battery pack assembly; The fire-fighting safety system comprises a primary fire-fighting unit, wherein the primary fire-fighting unit comprises a smoke collecting pipe and a smoke treatment unit, the smoke collecting pipe is used for conveying thermal runaway smoke generated by each battery pack assembly into the smoke treatment unit, and the smoke treatment unit is used for treating the thermal runaway smoke; Each battery pack assembly comprises an explosion venting collecting pipe and at least one battery module; Each battery module comprises a shell and n battery units, wherein the n battery units are arranged in the inner cavity of the shell along the y direction; Each battery unit comprises a second hollow member and m single batteries, wherein the m single batteries are arranged along the x direction, n is an integer greater than or equal to 1, and m is an integer greater than 1; The second hollow member extends along the x direction and covers the upper parts of the m single battery explosion venting parts, and the inner cavity of the second hollow member is used as a thermal runaway smoke converging channel and is communicated with the m single battery explosion venting parts; In each battery pack assembly, the thermal runaway smoke exhaust end of each battery module is communicated with an explosion venting collecting pipe, and the outlet end of the explosion venting collecting pipe is communicated with the smoke collecting pipe of the primary fire fighting unit.
  2. 2. The energy storage device of claim 1, wherein each battery unit further comprises a first hollow member assembly, an inner cavity of the first hollow member assembly is used as a heat exchange medium circulation channel, a liquid inlet end and a liquid outlet end of the first hollow member assembly extend out of the shell, the first hollow member assembly comprises a first sub-hollow member and a second sub-hollow member, the first sub-hollow member is a conductive member and is connected with the polar terminal of each single battery to realize the electric connection of each single battery, and the second sub-hollow member is an insulating member and is connected between two adjacent sections of the first sub-hollow members.
  3. 3. The energy storage device of claim 2, wherein the first hollow member has a hot melt connector secured to both ends thereof, the hot melt connector being connected to the second hollow member by hot melt.
  4. 4. The energy storage device as defined in claim 2, wherein the polarity terminals of each of the cells are provided with through grooves, and each segment of the first sub-hollow member is clamped into the polarity terminal through grooves of different polarities of two adjacent cells.
  5. 5. The energy storage device of claim 4, wherein a metallic conductive layer is disposed between the outer tube wall of the first sub-hollow member and the through slot of the polar terminal.
  6. 6. The energy storage device of claim 2, wherein each battery module further comprises a third electrical connection plate connected to the polar terminals of the respective battery cells.
  7. 7. The energy storage device of claim 2, wherein the first hollow member assembly has heat dissipating teeth on an inner wall thereof.
  8. 8. The energy storage device of claim 1, wherein the second hollow member is provided with m second through holes, the m second through holes are in one-to-one correspondence with the m single batteries, the front projection of each second through hole on the upper cover plate of the corresponding single battery completely covers the explosion venting part on the upper cover plate, and the inner cavity of the second hollow member is respectively communicated with the m single battery explosion venting parts through the m second through holes.
  9. 9. The energy storage device of claim 8, wherein the second hollow member is a split piece comprising a flexible base plate and a first half-tube having a U-shaped cross-section; the flexible bottom plate is fixedly connected with the upper cover plate of each single battery, and the first half pipe is buckled on the flexible bottom plate and is fixed with the flexible bottom plate in a sealing way; Or alternatively, the first and second heat exchangers may be, The second hollow component is a split piece and comprises a second half pipe with a U-shaped section and a second top plate for sealing the open end at the top of the second half pipe, wherein m second through holes are formed in a second half pipe bottom plate; Or alternatively, the first and second heat exchangers may be, The second hollow component is a split piece and comprises a second half pipe with a U-shaped section and a second top plate for sealing the open end at the top of the second half pipe, wherein m second through holes are formed in a bottom plate of the second half pipe; the explosion venting branch pipes are arranged on the upper cover plate of each single battery, and the front projection of the upper cover plate of each explosion venting branch pipe completely covers the explosion venting part on the upper cover plate; The free end of the explosion venting branch pipe penetrates through a corresponding second through hole on the second half pipe bottom plate to extend into the inner cavity of the second half pipe, the pipe wall of the explosion venting branch pipe is welded and sealed with the hole wall of the second through hole, and the second top plate is welded and sealed with the second half pipe.
  10. 10. The energy storage device of claim 1, wherein the insulating plate is arranged between adjacent single batteries, the shell is made of metal, the energy storage device further comprises an insulating plate, and the insulating plate is arranged between the n battery units and the shell.
  11. 11. The energy storage device of claim 1, wherein an insulating sealant layer is disposed between each of the cells and the housing.
  12. 12. The energy storage device of any one of claims 1 to 11, wherein the flue gas treatment unit comprises at least one of a liquid treatment device, a solid treatment device, a flue gas cooling device, and an ignition device; The liquid treatment device is mainly used for treating electrolyte and gas in the thermal runaway flue gas; the flue gas cooling device is mainly used for cooling the thermal runaway flue gas; the solid treatment device is mainly used for carrying out adsorption treatment on the gas in the thermal runaway flue gas; the ignition device is used for carrying out ignition treatment on the thermal runaway flue gas.
  13. 13. The energy storage device of claim 12, wherein the flue gas treatment unit comprises a liquid treatment device, the liquid treatment device comprises M liquid treatment tanks, each liquid treatment tank is provided with a flue gas inlet and a flue gas outlet, the 1 st to M-1 st liquid treatment tanks are filled with liquid treatment media, and the M liquid treatment tanks are empty tanks, wherein M is an integer greater than or equal to 2.
  14. 14. The energy storage device as set forth in claim 13, wherein the flue gas treatment unit further comprises an ignition device connected to the flue gas outlet of the Mth liquid treatment tank for igniting the thermal runaway flue gas treated by the liquid treatment device.
  15. 15. The energy storage device as claimed in any one of claims 1 to 11, wherein the primary fire unit further comprises a buffer device, the buffer device comprises at least one buffer tank, the buffer tank is provided with a smoke inlet and a smoke outlet communicated with the inner cavity of the buffer tank, and the buffer device is arranged between the smoke collecting pipe and the smoke treatment unit and is used for buffering the thermal runaway smoke.
  16. 16. The energy storage device according to any one of claims 1 to 11, wherein the fire protection system further comprises a secondary fire protection unit comprising a fire protection unit having fire extinguishing substances therein and a fire protection pipeline for delivering the fire extinguishing substances in the fire protection unit into the tank of the energy storage device.

Description

Energy storage equipment Technical Field The invention belongs to the field of batteries, and particularly relates to energy storage equipment. Background Along with the development of new energy sources such as solar energy, wind energy and the like, the energy storage technology is also developed, and the lithium battery has the advantages of high energy, long service life, high rated voltage, high power bearing capacity, low self-discharge rate and the like, so that the lithium battery gradually becomes a main stream product of energy storage. With the scale application of lithium battery energy storage devices, the safe use of lithium ion batteries is also of concern. Because the battery module in the energy storage equipment is highly aggregated, under the influence of factors such as overcharge and overdischarge, overheat, mechanical collision and the like of the battery, the battery diaphragm is easy to collapse and internal short circuit is easy to cause thermal runaway, thermal runaway smoke is generated, after the thermal runaway smoke is discharged, the aggregation is easy to burn, explosion is caused in severe cases, and potential safety hazards are caused. Disclosure of Invention The invention aims to provide energy storage equipment, which solves the problem that potential safety hazards exist after smoke gas in thermal runaway of the existing energy storage equipment is discharged. The technical scheme of the invention is to provide energy storage equipment which comprises a fire safety system and at least one battery pack assembly; The fire-fighting safety system comprises a primary fire-fighting unit, wherein the primary fire-fighting unit comprises a smoke collecting pipe and a smoke treatment unit, the smoke collecting pipe is used for conveying thermal runaway smoke generated by each battery pack assembly into the smoke treatment unit, and the smoke treatment unit is used for treating the thermal runaway smoke; each battery pack assembly comprises an explosion venting collecting pipe and at least one battery module, wherein each battery module comprises a shell and n battery units, and the n battery units are arranged in the inner cavity of the shell along the y direction; Each battery unit comprises a second hollow member and m single batteries, wherein the m single batteries are arranged along the x direction, n is an integer greater than or equal to 1, and m is an integer greater than 1; The second hollow member extends along the x direction and covers the upper parts of the m single battery explosion venting parts, and the inner cavity of the second hollow member is used as a thermal runaway smoke converging channel and is communicated with the m single battery explosion venting parts; In each battery pack assembly, the thermal runaway smoke exhaust end of each battery module is communicated with an explosion venting collecting pipe, and the outlet end of the explosion venting collecting pipe is communicated with the smoke collecting pipe of the primary fire fighting unit. The energy storage equipment comprises a plurality of battery modules, wherein each battery module comprises a shell and a plurality of battery units, the plurality of battery units are arranged in one shell, when the battery units in the inner cavity of the shell burst due to thermal runaway, splashes are blocked by the shell and cannot threaten personal safety of personnel around the energy storage equipment, meanwhile, the explosion venting parts of the battery units are communicated based on one second hollow member, when any battery unit in the shell is thermally out of control, the thermal runaway smoke burst explosion venting parts are discharged out of the shell from the thermal runaway smoke discharge end of the second hollow member, and the influence of the thermal runaway smoke dispersed into the inner cavity of the shell on other battery units is avoided. Meanwhile, the primary fire-fighting unit is arranged in the energy storage equipment and comprises the smoke collecting pipe and the smoke treatment unit, the thermal runaway smoke discharge end is connected with the smoke treatment unit through the explosion venting collecting pipe and the smoke collecting pipe, and the thermal runaway smoke discharged out of the shell sequentially passes through the explosion venting collecting pipe and the smoke collecting pipe and enters the smoke treatment unit for treatment, so that potential safety hazards generated after the thermal runaway smoke is discharged are further reduced. Further, each battery unit further comprises a first hollow component assembly, an inner cavity of the first hollow component assembly is used as a heat exchange medium circulation channel, a liquid inlet end and a liquid outlet end of the first hollow component assembly extend out of the shell, the first hollow component assembly comprises a first sub-hollow component and a second sub-hollow component, the first sub-hollow component