CN-122029659-A - Battery module for delaying heat propagation

Abstract

A battery module according to an embodiment of the invention includes a battery cell stack formed from a plurality of battery cells, a module housing including a top plate disposed above the battery cell stack and configured to house the battery cell stack, and an aerogel layer disposed between the top plate and the battery cell stack. The battery module according to the embodiment of the invention can delay heat propagation and can prevent backfire back to the battery cells from the inside of the battery module.

Inventors

• Min Jinji
• Lin Zhaoen
• Jin Heen
• PU ZHONGYU
• Quan Xiangrun
• FANG YUXI

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260512

Application Date

20250327

Priority Date

20240422

Claims (17)

1. 1. A battery module, the battery module comprising: a plurality of battery cells; a module case including a top plate disposed at an upper side of the plurality of battery cells and accommodating the plurality of battery cells, and And the aerogel layer is arranged between the top plate and the battery cells.
2. 2. The battery module of claim 1, wherein the aerogel layer is made of aerogel.
3. 3. The battery module of claim 1, wherein the aerogel layer is made of an aerogel pad.
4. 4. The battery module of claim 1, wherein a lower surface of the aerogel layer is in contact with the battery cell stack and an upper surface of the aerogel layer is in contact with the top plate.
5. 5. The battery module of claim 1, wherein the top plate comprises one or more vent holes.
6. 6. The battery module of claim 5, wherein a width of the vent in a width direction of the battery module is greater than a length of the vent in a length direction of the battery module.
7. 7. The battery module of claim 5, wherein a plurality of the vent holes are provided in a width direction of the battery module.
8. 8. The battery module of claim 1, further comprising an upper aerogel layer disposed on an upper side of the top plate.
9. 9. The battery module of claim 1, further comprising a fire resistant tab disposed on an upper side of the top plate.
10. 10. The battery module of claim 9, wherein the fire resistant sheet comprises mica.
11. 11. The battery module of claim 9, wherein the fire resistant sheet comprises one or more vent holes.
12. 12. The battery module of claim 11, wherein the top plate comprises one or more vent holes, and the vent holes of the top plate and the vent holes of the fire resistant sheet overlap in a plane.
13. 13. The battery module according to claim 11, wherein a width of the vent hole of the fire-resistant sheet in a width direction of the battery module is greater than a length of the vent hole of the fire-resistant sheet in a length direction of the battery module.
14. 14. The battery module of claim 11, wherein the plurality of vent holes of the fire resistant sheet are disposed along a width direction of the battery module.
15. 15. The battery module of claim 9, further comprising an upper aerogel layer disposed between the top plate and the refractory sheet.
16. 16. The battery module of claim 15, wherein the upper aerogel layer is made of a aerogel mat.
17. 17. The battery module of claim 1, wherein the plurality of battery cells form a battery cell stack, and the battery cell stack is housed in the module housing.

Description

Battery module for delaying heat propagation Technical Field The present disclosure relates to battery modules, and more particularly, to battery modules for delaying heat propagation. Background Unlike a primary battery that is not rechargeable, a secondary battery may be charged and discharged, and is applied not only to portable devices but also to Electric Vehicles (EVs) and Hybrid Electric Vehicles (HEVs) driven by an electric driving source. The types of secondary batteries that are widely used at present include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and the like. The operating voltage of the unit secondary battery cell (i.e., the unit cell) is about 2.5V to 4.6V. Therefore, when an output voltage higher than this is required, the battery pack is configured by connecting a plurality of battery cells in series. Further, the battery pack may be configured by connecting a plurality of battery cells in parallel according to the charge/discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack may be differently set according to a desired output voltage or charge/discharge capacity. Generally, in the case of configuring a battery pack by connecting a plurality of battery cells in series/parallel, a battery module composed of at least one battery cell or a plurality of battery cells is first configured, and then the battery pack is configured using at least one such battery module and adding other components. Here, the battery module refers to a component in which a plurality of battery cells are connected in series or in parallel, and the battery pack refers to a component in which a plurality of battery modules are connected in series or in parallel to increase capacity and output. The battery module constituting such a secondary battery generates heat according to charge or discharge, and if overcharge or the like occurs, swelling of the battery module may cause explosion or fire, which may lead to a greater risk of life loss. Therefore, there is a need for a method of delaying ignition and preventing a chain fire when a battery module fires. Disclosure of Invention Technical problem It is an object of the present disclosure to provide a battery module for delaying heat propagation. Technical proposal A battery module according to an embodiment of the present disclosure may include a plurality of battery cells, a module case including a top plate disposed at an upper side of the plurality of battery cells and accommodating the plurality of battery cells, and an aerogel layer disposed between the top plate and the plurality of battery cells. In addition, the aerogel layer may be made of aerogel. In addition, the aerogel layer may be made of an aerogel pad. In addition, a lower surface of the aerogel layer may be in contact with the battery cell stack, and an upper surface of the aerogel layer may be in contact with the top plate. Additionally, the top plate may include one or more vent holes. In addition, the width of the vent hole in the width direction of the battery module may be greater than the length of the vent hole in the length direction of the battery module. In addition, a plurality of the vent holes may be provided in the width direction of the battery module. In addition, the battery module may further include an upper aerogel layer disposed at an upper side of the top plate. In addition, the battery module may further include a fire-resistant sheet disposed at an upper side of the top plate. In addition, the refractory flakes may include mica. In addition, the refractory block may include one or more vent holes. In addition, the top plate includes one or more vent holes, and the vent holes of the top plate and the vent holes of the refractory plate may overlap on a plane. In addition, the width of the vent hole of the fire-resistant sheet in the width direction of the battery module may be greater than the length of the vent hole of the fire-resistant sheet in the length direction of the battery module. In addition, a plurality of the vent holes of the fire-resistant sheet may be provided in the width direction of the battery module. In addition, the battery module may further include an upper aerogel layer disposed between the top plate and the fire resistant sheet. In addition, the upper aerogel layer may be made of an aerogel pad. In addition, the plurality of battery cells form a battery cell stack, and the battery cell stack is housed in the module case. Effects of the invention The battery module according to the embodiments of the present disclosure has an effect of delaying heat propagation. In addition, the battery module has an effect of preventing flashback from the inside of the battery module from diffusing to the battery cells. Drawings Fig. 1 is a perspective view of a battery module according to an embodiment of the present discl