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EP-4485655-B1 - BATTERY AND ELECTRIC DEVICE

EP4485655B1EP 4485655 B1EP4485655 B1EP 4485655B1EP-4485655-B1

Inventors

  • WU, Shaoji
  • LI, YAO
  • CHEN, XIAOBO
  • CHEN, SHILONG
  • GU, Mingguang

Dates

Publication Date
20260506
Application Date
20221031

Claims (13)

  1. A battery (10), comprising: a box (11) comprising an electrical chamber (11a); a battery cell (20) accommodated in the electrical chamber (11a), a pressure relief mechanism (213) being disposed on a first wall (21) of the battery cell (20); and a support component (13) attached to the first wall (21), the support component (13) being configured so that emissions of the battery cell (20) pass through the support component (13) to be discharged out of the electrical chamber (11a) when the pressure relief mechanism (213) is actuated, and the support component (13) being provided with a reinforcing structure (14); wherein the support component (13) comprises a first support wall (131) disposed opposite the first wall (21), and the reinforcing structure (14) is disposed on a surface of the first support wall (131) away from the first wall (21); characterized in that the support component (13) further comprises two side walls (132) connected to the first support wall (131), and the reinforcing structure (14) is disposed between the two side walls (132).
  2. The battery (10) according to claim 1, wherein the reinforcing structure (14) is connected to the two side walls (132).
  3. The battery (10) according to claim 1 or 2, wherein the first support wall (131) forms an inverted "U" shaped structure with the two side walls (132).
  4. The battery (10) according to any one of claims 1-3, wherein the support component (13) further comprises a second support wall (133) disposed opposite the first support wall (131), and the first support wall (131), the second support wall (133), and the two side walls (132) form a "square" structure, preferably wherein the reinforcing structure (14) is connected to the first support wall (131) and/or the second support wall (133).
  5. The battery (10) according to any one of claims 1 to 4, wherein the first support wall (131) is provided with a pressure relief region (1311), and emissions of the battery cell (20) pass through the pressure relief region (1311) to be discharged out of the electrical chamber (11a) when the pressure relief mechanism (213) is actuated.
  6. The battery (10) according to claim 5, wherein the pressure relief region (1311) is staggered with the reinforcing structure (14).
  7. The battery (10) according to claim 5 or 6, wherein the pressure relief region (1311) is a weakened region of the first support wall (131), and the weakened region is to be disrupted when the pressure relief mechanism (213) is actuated, preferably wherein the first support wall (131) is provided with a recess corresponding to the pressure relief mechanism (213), and the weakened region is provided on a bottom wall of the recess.
  8. The battery (10) according to claim 5 or 6, wherein the pressure relief region (1311) is a first through hole that penetrates the first support wall (131) along a thickness direction of the first support wall (131).
  9. The battery (10) according to claim 8, wherein the battery (10) further comprises a sealing component (15), the sealing component (15) being used to seal the first through hole and to be disrupted when the pressure relief mechanism (213) is actuated, preferably wherein the sealing component is disposed in the first through hole to seal the first through hole, or wherein the sealing component (15) is disposed on a surface of the first support wall (131) facing the first wall (21), and/or the sealing component (15) is disposed on a surface of the first support wall (131) away from the first wall (21).
  10. The battery (10) according to any one of claims 1 to 9, wherein the support component (13) is integrally formed with the reinforcing structure (14).
  11. The battery (10) according to any one of claims 1 to 10, wherein the box (11) further comprises a collection chamber (11b) used for collecting the emissions of the battery cell 20 that pass through the support component (13) to be discharged when the pressure relief mechanism (213) is actuated.
  12. The battery (10) according to claim 11, wherein the battery (10) further comprises an exhaust component (16), and the emissions of the battery cell (20) in the collection chamber (11b) are discharged out of the box (11) via the exhaust component (16), preferably wherein the support component (13) is provided with a second through hole, the box (11) is provided with a third through hole, a first end of the exhaust component (16) is connected to the second through hole, and a second end of the exhaust component (16) is connected to the third through hole, and/or wherein the exhaust component (16) comprises a cavity that communicates with the collection chamber (11b), and the emissions of the battery cell (20) in the collection chamber (11b) are discharged out of the box (11) through the cavity.
  13. An electrical device, comprising the battery (10) according to any one of claims 1-12, the battery (10) being configured to provide electric energy.

Description

Technical Field The present application relates to the technical field of batteries, and more particularly to a battery and an electrical device. Background With the development over time, electric vehicles, with their advantages such as high environment friendliness, low noise, and low use costs, have great market prospects and can effectively promote energy conservation and emission reduction, and therefore are conducive to the development and progress of society. For electric vehicles, battery technology is an important factor related to their development. In the development of the battery technology, safety is also a non-negligible issue in addition to the improvement of performance of batteries. If the safety of the batteries cannot be guaranteed, the batteries cannot be used. Therefore, how to improve the safety of the batteries is an urgent problem to be solved in the battery technology. US2022/320696 A1 discloses a battery according to the preamble of claim 1. Summary of the Invention The present application provides a battery and an electrical device and can improve safety performance of the battery. In a first aspect, provided is a battery according to claim 1. The reinforcing structure is disposed on the surface of the first support wall so that the first support wall provides greater support to support the battery cell. In addition, the reinforcing structure is disposed on the surface of the first support wall away from the first wall so that the reinforcing structure can avoid affecting connection between the first support wall and the first wall. The two side walls of the support component may improve the overall impact resistance of the support component. Especially when the box is subjected to mechanical extrusion or impact from the side, the two side walls may provide sufficient structural strength to resist the extrusion and impact from the side, thereby avoiding vibration of the battery cell inside the box and ensuring the safety of the battery. In a possible embodiment, the reinforcing structure is connected to the two side walls. The reinforcing structure is connected to the two side walls so that the overall structural strength of the support component is further increased. In a possible embodiment, the first support wall and the two side walls form an inverted "U"-shaped structure. The inverted "U" shaped structure may increase the structural strength of the support component as compared with a flat-plate structure while facilitating the connection between the first support wall and the first wall. In a possible embodiment, the support component further includes a second support wall disposed opposite the first support wall, and the first support wall, the second support wall and the two side walls form a "square" structure. The support component is provided with the second support wall opposite to the first support wall, and the formed support component that is of the "square" structure has higher structural strength. The weight of the support component is minimized while the structural strength is increased. In a possible embodiment, the reinforcing structure is connected to the first support wall and/or the second support wall, further increasing the overall structural strength of the support component. In a possible embodiment, the first support wall is provided with a pressure relief region, and emissions of the battery cell pass through the pressure relief region to be discharged out of the electrical chamber when the pressure relief mechanism is actuated. The emissions of the battery cell may pass through the pressure relief region to be discharged out of the electrical chamber, avoiding that the emissions intensively enter the electrical chamber to cause short circuits or thermal runaway between battery cells to affect the safety of the battery. In a possible embodiment, the pressure relief region is staggered with the reinforcing structure. In this way, a discharge path in which the emissions of the battery cell pass through the pressure relief region to be discharged out of the electrical chamber is blocked by the reinforcing structure, thereby ensuring that the emissions of the battery cell are discharged out of the electrical chamber smoothly, avoiding thermal runaway spread, and improving the safety of the battery. In a possible embodiment, the pressure relief region is a weakened region of the first support wall, and the weakened region is to be disrupted when the pressure relief mechanism is actuated. The pressure relief region is constructed as the weakened region, so that when the pressure relief mechanism is not actuated, for example, during normal use of the battery, the first support wall is sealed, effectively protecting the pressure relief mechanism and avoiding failure of the pressure relief mechanism due to damage by an external force. Furthermore, when the pressure relief mechanism is actuated, the weakened region can be disrupted so that the emissions of the