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CN-224232768-U - Battery device and energy storage device

CN224232768UCN 224232768 UCN224232768 UCN 224232768UCN-224232768-U

Abstract

The application provides a battery device and an energy storage device, wherein the battery device comprises a battery monomer, a box body and a gas treatment device, the gas treatment device is arranged on the box body and can treat gas in the box body, the gas device comprises an oxygen reduction component such as an oxygen consumption material and a high polymer breathable film, and the oxygen reduction component is used for reducing the oxygen content in the box body to be smaller than the oxygen content outside the box body. The application can effectively reduce the oxygen content in the battery device, reduce the risk of thermal runaway deflagration of the battery device and improve the safety performance of the battery device.

Inventors

  • YANG CHANGLE
  • HAO YUCANG
  • CHEN XIAOBO

Assignees

  • 宁德时代新能源科技股份有限公司
  • 厦门实证储能科技研究院有限公司

Dates

Publication Date
20260512
Application Date
20250312

Claims (15)

  1. 1. A battery device, characterized by comprising: A plurality of battery cells arranged to form an energy storage or release unit of the battery device; a case for accommodating a plurality of the battery cells, and The gas treatment device is arranged on the box body and is used for treating the gas in the box body, wherein the gas treatment device comprises an oxygen reduction component, and the oxygen reduction component is used for reducing the oxygen content in the box body to be smaller than the oxygen content outside the box body.
  2. 2. The battery device of claim 1, wherein the housing includes first and second spaced apart cavities, the battery cells being configured to be received within the first cavities, the gas treatment device being configured to communicate with the second cavities.
  3. 3. The battery device of claim 2, wherein the second cavity comprises a first subchamber surrounding at least a bottom wall of the first cavity and a second subchamber surrounding at least a side wall of the first cavity, the gas treatment device being disposed on an outer side wall of the second subchamber.
  4. 4. The battery device of claim 3, wherein the battery cell comprises a first pressure relief device disposed toward the first subchamber, and/or wherein the battery device comprises a second pressure relief device disposed at the outer sidewall of the second subchamber.
  5. 5. The battery device of any of claims 3 or 4, wherein the battery device comprises a thermal management component located between the battery cell and the first subchamber.
  6. 6. The battery device according to any one of claims 1 to 4, wherein the gas treatment device includes a housing chamber that communicates with the case interior space, the housing chamber being isolated from the case exterior space, the oxygen reduction member being provided in the housing chamber.
  7. 7. The battery device of any one of claims 1-4, wherein the oxygen reduction component comprises an oxygen consuming material comprising an inorganic matrix based deoxidizer and/or an organic matrix based deoxidizer.
  8. 8. The battery device of any one of claims 3 or 4, wherein the gas treatment device includes a connection portion detachably connected to the outer side wall.
  9. 9. The battery device according to any one of claims 3 or 4, wherein the oxygen reduction member includes a polymer gas permeable membrane, and the polymer gas permeable membrane is disposed such that a speed at which oxygen in the case permeates the polymer gas permeable membrane is greater than a speed at which nitrogen in the case permeates the polymer gas permeable membrane.
  10. 10. The battery device according to claim 9, wherein the high-molecular breathable film comprises a polyimide film, a polyurethane film, a polycarbonate film, a polytetrafluoroethylene film, a silicone film, a polyethylene film, a polypropylene film, or a composite film.
  11. 11. The battery device according to claim 9, wherein the outer side wall includes a through hole, and the polymer gas-permeable membrane is provided so as to cover the through hole.
  12. 12. The battery device according to claim 9, wherein the gas treatment device further comprises a reinforcement member that is provided around the polymer gas-permeable membrane to the outer side wall and communicates with the case outside space.
  13. 13. The battery device according to claim 9, wherein the gas treatment device further comprises a ventilation duct provided to the outer side wall, in communication with the second chamber, so that air can be injected into the second chamber.
  14. 14. The battery device according to claim 9, wherein the oxygen reduction member further includes an oxygen consumption material, the gas treatment device includes a connection portion detachably connected to the outer side wall, the connection portion is provided outside the polymer gas permeable membrane, and the connection portion includes a housing portion, and the oxygen consumption material is provided in the housing portion.
  15. 15. An energy storage device comprising a battery device according to any one of claims 1-14.

Description

Battery device and energy storage device Technical Field The present application relates to the field of battery technologies, and in particular, to a battery device and an energy storage device. Background The energy storage device is used for storing and releasing electric energy, and the storage and release of the electric energy are realized by taking at least one battery device as an energy storage module. The battery device is used as an energy storage device of the energy storage module, and higher requirements are put on the safety performance of the battery. Disclosure of utility model In view of the above, the present application provides a battery device and an energy storage device, wherein a gas treatment device is disposed on the battery device to improve the safety of the battery device, thereby improving the safety performance of the energy storage device. In a first aspect, the application provides a battery device, comprising a battery cell, a box body for containing a plurality of battery cells, and a gas treatment device arranged on the box body and used for treating gas in the box body, wherein the gas treatment device comprises an oxygen reduction component used for reducing the oxygen content in the box body to be smaller than the oxygen content outside the box body. According to the technical scheme provided by the embodiment of the application, the gas treatment device with the oxygen reduction component is arranged on the box body of the battery device, so that the oxygen concentration in the battery device can be reduced, the possibility of burning of the battery box body is reduced, and the safety performance of the battery device is improved. In some embodiments, the housing includes a first cavity and a second cavity spaced apart, the battery cell is configured to be received in the first cavity, and the gas treatment device is configured to be in communication with the second cavity. One embodiment of the application provides a housing for a battery device comprising a first cavity and a second cavity, a battery cell configured to be received within the first cavity, and a gas treatment device configured to communicate with the second cavity. The first cavity can provide stable accommodation space for the battery monomer, and the second cavity can provide the condition for the inside circulation of air of box, better guide the gas circulation in the case to gas treatment device to promote the inside reduction oxygen efficiency of box, improve battery device's security performance. In some embodiments, the second chamber comprises a first sub-chamber and a second sub-chamber separated from each other, the first sub-chamber surrounding at least a bottom wall of the first chamber, the second sub-chamber surrounding at least a side wall of the first chamber, and the gas treatment device is disposed on an outer side wall of the second sub-chamber. In one embodiment of the present application, the second chamber includes a first sub-chamber and a second sub-chamber, and the gas processing device is disposed on an outer sidewall of the second sub-chamber. The first subchamber can guide the hot gas that the battery produced when out of control, and the second subchamber can distinguish first subchamber, makes things convenient for gas treatment device's lateral wall to set up and intensive box space. By the arrangement, the safety of the battery device can be improved, and the space can be saved. In some embodiments, the battery cell includes a first pressure relief device disposed toward the first subchamber, and/or the battery device includes a second pressure relief device disposed on an outer sidewall of the second subchamber. According to the battery device provided by the embodiment of the application, the first pressure relief device of the battery monomer is arranged towards the first subchamber, so that pressure can be relieved towards the first subchamber when the battery monomer is in thermal runaway, and substances such as hot gas generated by the battery monomer which is out of control are led to be discharged to the second cavity, so that the thermal influence on other battery monomers is reduced. The second pressure relief device is located the lateral wall of second subchamber, can guide the material such as steam in the box to let out. By the above arrangement, the safety of the battery device is improved. In some embodiments, the battery device includes a thermal management component located between the battery cell and the first subchamber. According to the battery device provided by the embodiment of the application, the thermal management component is arranged between the battery unit and the first subchamber, so that the thermal management efficiency and the safety of the battery unit can be improved. In some embodiments, the gas treatment device includes a containment chamber in communication with the tank interior space, the containment chamber being isolated f