CN-122003773-A - Battery pack and vehicle comprising same

Abstract

A battery pack includes a plurality of battery modules including a plurality of battery cells, a battery pack case having an accommodation space configured to accommodate the plurality of battery modules, a cover member disposed between the battery modules and the battery pack case and having a through hole through which exhaust gas discharged from the battery cells passes, and a spacer mounted to the cover member and configured to maintain a gap between the cover member and the battery pack case.

Inventors

• CUI TINGYU
• JIN GUANGMO
• Li Zhujiong
• ZHENG HUIMEI

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260508

Application Date

20250626

Priority Date

20240717

Claims (13)

1. 1. A battery pack, the battery pack comprising: A plurality of battery modules including a plurality of battery cells; A battery pack case having a storage space formed to store the plurality of battery modules; A cover member disposed between the battery module and the battery pack case and having a through-hole formed such that exhaust gas discharged from the battery cells passes through the through-hole, and A spacer mounted to the cover member and configured to maintain a gap between the cover member and the battery pack case.
2. 2. The battery pack according to claim 1, Wherein the cover member is configured to cover the top of the battery module.
3. 3. The battery pack according to claim 1, Wherein the battery pack case has a plurality of storage spaces, and Wherein the cover member is configured to cover at least some of the plurality of storage spaces.
4. 4. A battery pack according to claim 3, Wherein the cover member is provided as a plurality of cover members such that the plurality of cover members are respectively provided in at least some of the plurality of storage spaces.
5. 5. The battery pack according to claim 1, Wherein the battery pack housing includes a cross beam configured to separate the plurality of battery modules, and Wherein the cover member is configured to rest on the cross beam.
6. 6. The battery pack according to claim 1, Wherein the through holes are provided with a plurality of through holes, and the plurality of through holes are provided at regular intervals.
7. 7. The battery pack according to claim 6, Wherein the spacer is configured to be inserted into at least some of the plurality of through holes.
8. 8. The battery pack according to claim 1, Wherein the battery module includes a module case configured to group the plurality of battery cells, and having a vent hole formed on one side configured to vent the exhaust gas to the outside.
9. 9. The battery pack according to claim 8, Wherein the spacers are alternately disposed with the exhaust holes.
10. 10. The battery pack according to claim 1, Wherein the spacer includes a first portion disposed between the cover member and the battery pack case.
11. 11. The battery pack according to claim 1, Wherein the spacer comprises a second portion disposed between the cover member and the battery cell.
12. 12. The battery pack according to claim 1, Wherein the spacer is configured to be larger than the through hole.
13. 13. A vehicle comprising the battery pack according to any one of claims 1 to 12.

Description

Battery pack and vehicle comprising same Technical Field The present disclosure relates to a battery pack and a vehicle including the battery pack. The present application is based on and claims priority from korean patent application No. 10-2024-0094381 filed on the year 2024, month 7, and 17 to the korean intellectual property department, the disclosure of which is incorporated herein by reference in its entirety. Background The secondary battery has high applicability in product types and has electrical characteristics such as high energy density, etc., and is widely applied not only to portable devices but also to Electric Vehicles (EVs) or Hybrid Electric Vehicles (HEVs) driven by a power source. Such secondary batteries are attracting attention as new energy sources for enhancing environmental sustainability and energy efficiency not only because of their major advantage of significantly reducing the use of fossil fuels, but also because they do not generate byproducts from energy use. Secondary batteries that are widely used at present include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, and nickel zinc batteries. The operating voltage of such a unit secondary battery cell (i.e., unit cell) is about 2.5V to 4.5V. Therefore, when a higher output voltage is required, the battery pack may be configured by connecting a plurality of battery cells in series. In addition, the battery pack may be configured by connecting a plurality of battery cells in parallel according to the charge and discharge capacity required for the battery pack. Therefore, the number of battery cells included in the battery pack may be variously configured according to a desired output voltage or charge-discharge capacity. Further, a general method for configuring a battery pack by connecting a plurality of battery cells in series/parallel is performed by preferentially configuring a battery module including one or more battery cells and then by adding other components to the one or more battery modules to configure the battery pack or the battery rack. Recently, battery packs of the cell-to-battery type have been manufactured in which a plurality of battery cells are directly stored in a battery pack case or the like instead of being modularized. Furthermore, since the battery cells involve chemical reactions during charge and discharge, their performance may deteriorate when used at temperatures exceeding an appropriate level. Furthermore, if the thermal control is not properly maintained at the proper temperature, there is still a potential risk of accidental fires or explosions. Thus, if a thermal event such as thermal runaway occurs inside the battery pack, high temperature gas and flame discharged from the battery cells included in the battery pack may propagate to neighboring battery cells, thereby causing a chain reaction explosion of the battery cells, which poses a significant safety risk. In particular, when a thermal event such as thermal runaway occurs inside the battery pack, gas may be discharged from the battery cells included in the battery pack, and such gas may include flames or the like. In general, when gas is discharged from the battery cell, electrode plate particles or active material particles heated to a high temperature may also be discharged to the outside from the battery cell, and these high temperature particles may appear as sparks. In this case, when sparks are present with the released gas, they may react with oxygen and cause a flame to occur inside or outside the battery pack or even a fire to occur. Furthermore, when a flame or fire occurs in a specific battery pack, the flame may spread to other adjacent battery packs or devices equipped with the battery packs, thereby causing greater problems. Therefore, a technique is required to prevent sparks or flames from spreading in all directions when thermal runaway occurs in the battery cells, and to suppress the occurrence or spread of flames or fires in the battery pack. In addition, it is necessary to develop a structure capable of dispersing and exhausting high-temperature gas generated from the battery cells when thermal runaway occurs in the battery cells, thereby preventing heat accumulation inside the battery pack. Disclosure of Invention Technical problem The present disclosure is directed to solving the problems of the related art, and therefore, the present disclosure is directed to providing a battery pack capable of minimizing thermal energy transferred to neighboring battery cells when thermal runaway occurs in the battery cells, thereby preventing or inhibiting thermal runaway propagation between the battery cells, and improving safety and reliability. In addition, the present disclosure also provides a vehicle including such a battery pack. However, the technical problems the present disclosure seeks to solve are not limited to the above-described problems, and other proble