CN-115868079-B - Battery module having curved trap portion and battery pack including the same

Abstract

The present invention relates to a battery module having a curved trap part and a battery pack including the same, and more particularly, to a battery module having a curved trap part and a battery pack including the same, the battery module including a plurality of battery cells (100), a bus bar (200) for electrically connecting the plurality of battery cells (100), and a module case (300) for accommodating the plurality of battery cells (100) and the bus bar (200), wherein the module case (300) includes a receiving part (310) having a predetermined space, a first trap part (320) through which air is introduced, a second trap part (330) through which air is discharged, and an air flow part (340) through which the introduced air flows.

Inventors

• LI YINGXI
• Jiang Rencai
• Lin Daxun
• CAO YONGFAN

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260512

Application Date

20220524

Priority Date

20210615

Claims (9)

1. 1. A battery module, comprising: A plurality of battery cells; a bus bar configured to electrically connect the plurality of battery cells to each other, and A module housing configured to receive the plurality of battery cells and the bus bar, wherein The module case includes a receiving portion configured to define a predetermined space, a first trapping portion configured to introduce air, a second trapping portion configured to discharge air, and an air flow passage portion configured to allow the introduced air to move along the air flow passage portion, Wherein the first trapping part includes: A first pocket portion recessed outwardly to define a predetermined space, and A first air circulation passage formed to be curved in a direction toward a side surface of the first bag portion.
2. 2. The battery module of claim 1, wherein the second trap part comprises: a partition wall bent at a predetermined angle to define a predetermined space, and And a second air circulation passage formed in an "S" shape by the partition wall.
3. 3. The battery module of claim 2, wherein the first air circulation channel has a width that gradually increases from an inside to an outside of the first air circulation channel.
4. 4. The battery module of claim 1, wherein the second trap part comprises: A second pocket portion recessed outward to define a predetermined space, and And a second air circulation passage formed to be curved in a direction toward a side surface of the second bag portion.
5. 5. The battery module of claim 4, wherein the first air circulation channel has a width that gradually increases from an inside to an outside of the first air circulation channel.
6. 6. The battery module of claim 4, wherein the second air circulation channel has a width that gradually increases from an inside to an outside of the second air circulation channel.
7. 7. The battery module according to claim 1, wherein the first trap part is formed at a corner part of one side of the receiving part.
8. 8. The battery module according to claim 7, wherein the second trap part is formed at a corner of the receiving part on a straight line with the first trap part.
9. 9. A battery pack comprising the battery module according to any one of claims 1 to 8.

Description

Battery module having curved trap portion and battery pack including the same Technical Field This application claims priority benefit of korean patent application No. 2021-00777777 filed on day 15 of 6 of 2021, the disclosure of which is incorporated herein by reference in its entirety. The present invention relates to a battery module having a curved trap part and a battery pack including the same, and more particularly, to a battery module having a curved trap part capable of preventing high-temperature byproducts from being discharged to the outside when thermal runaway occurs in the battery module, thereby being capable of suppressing secondary damage, and a battery pack including the same. Background With the recent development of alternative energy due to air pollution and energy exhaustion caused by the use of fossil fuel, the demand for secondary batteries capable of storing generated electric energy has increased. Secondary batteries capable of being charged and discharged are used in close proximity in daily life. For example, secondary batteries are used in mobile devices, electric vehicles, and hybrid electric vehicles. As the use of mobile devices increases, the complexity of mobile devices increases, and electric vehicles develop, the required capacity of secondary batteries, which are energy sources for various electronic devices inevitably used in modern society, has increased. In order to meet the needs of users, a plurality of battery cells are placed in a small-sized device, and a battery module including a plurality of battery cells electrically connected to each other or a battery pack including a plurality of battery modules is used in a vehicle. When the secondary battery is used in a device requiring a large capacity and high output, such as an electric vehicle, the secondary battery is used in the form of a battery module or a battery pack in which a plurality of battery cells are arranged. Meanwhile, thermal runaway may occur in the battery cells received in the battery module due to overheating, and thus it is necessary to cool the battery cells in the battery module. Thermal runaway and fire outbreaks occurring in one cell are transferred to the cell adjacent thereto, thereby generating high temperature gases and byproducts. At this time, a fire may be exploded in the battery pack or the device in which the battery module is mounted while high-temperature byproducts are discharged from the battery module, whereby secondary damage may occur. In connection with this, fig. 1 is a perspective view of a conventional battery module. Referring to fig. 1, the conventional battery module includes a plurality of stacked battery cells 10 and a module case 20 configured to receive the plurality of battery cells 10, and the module case 20 is provided with an air inlet 21, an air outlet 22, and an air circulation passage 23, the air circulation passage 23 being configured to circulate air introduced into the module case, thereby cooling the battery cells 10 using the air. In the conventional battery module, the battery cells 10 are cooled using air, thereby suppressing an increase in temperature. However, cooling is limited, whereby thermal runaway may occur. In addition, high temperature byproducts and exhaust gas may be generated due to thermal runaway. When exhaust gas is discharged through the air inlet 21 and the air outlet 22, high-temperature byproducts may also be discharged, whereby a secondary fire explosion may occur in a battery pack or device in which the battery module is mounted. (Prior art literature) (Patent document 1) Korean patent application publication No. 2020-0110281 Disclosure of Invention Technical problem The present invention has been made in view of the above problems, and it is an object of the present invention to provide a battery module having a curved trap portion capable of preventing high-temperature byproducts generated due to thermal runaway in the battery module from being discharged to the outside, and a battery pack including the same. Another object of the present invention is to provide a battery module having a curved trap part capable of discharging exhaust gas generated in the battery module to the outside, thereby improving safety of the battery module, and a battery pack including the battery module. Technical proposal In order to achieve the above object, a battery module having a curved trap part according to the present invention includes a plurality of battery cells (100), a bus bar (200) configured to electrically connect the plurality of battery cells (100) to each other, and a module case (300) configured to receive the plurality of battery cells (100) and the bus bar (200), wherein the module case (300) includes a receiving part (310) configured to define a predetermined space, a first trap part (320) configured to introduce air, a second trap part (330) configured to discharge air, and an air flow path part (340) configured to allow the