CN-122003770-A - Battery pack and vehicle including the same

Abstract

The battery pack according to the present invention includes a plurality of cell array structures having a plurality of battery cells, a battery pack case having a base member disposed at one side of the plurality of cell array structures and having a first receiving space on the base member to receive the plurality of cell array structures and a second receiving space not to receive the cell array structures, and a plurality of exhaust spaces one-to-one corresponding to the plurality of cell array structures and disposed on the base member, wherein a close contact area is provided around the exhaust spaces on the base member such that the cell array structures are in close contact therewith, and the plurality of exhaust spaces are isolated from each other in the first receiving space and from the second receiving space.

Inventors

• Bai Chenglv

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260508

Application Date

20250702

Priority Date

20240709

Claims (17)

1. 1. A battery pack, the battery pack comprising: The battery cell array structure comprises a plurality of battery cells; A battery pack case including a bottom member disposed at one side of the plurality of cell array structures and having a first receiving space formed on the bottom member to receive the plurality of cell array structures and a second receiving space not to receive the cell array structures, and A plurality of exhaust spaces formed on the base member so as to correspond to the plurality of cell array structures one by one, Wherein a close contact area is provided at the periphery of the exhaust space on the bottom member so that the cell array structure is in close contact therewith, and Wherein the plurality of exhaust spaces are isolated from each other in the first accommodation space and from the second accommodation space.
2. 2. The battery pack according to claim 1, Wherein the second receiving space is configured to receive one or more electrical components.
3. 3. The battery pack according to claim 1, The battery pack further includes a filling member filled in the cell array structure, Wherein the filling member is in close contact with the close contact area.
4. 4. The battery pack according to claim 1, Wherein the cell array structure further comprises a side frame configured to support and house the battery cells, and Wherein the side frame is in close contact with the close contact area.
5. 5. The battery pack according to claim 1, Wherein the battery cell comprises a venting unit at the bottom thereof, and Wherein the exhaust space is disposed at the bottom of the battery cell.
6. 6. The battery pack according to claim 1, Wherein the exhaust space is integrally formed with the base member.
7. 7. The battery pack according to claim 1, Wherein the base member includes a first base and a second base spaced apart from each other, an Wherein the exhaust space is formed between the first bottom and the second bottom.
8. 8. The battery pack according to claim 1, Wherein the vent space is formed by extrusion molding the base member.
9. 9. The battery pack according to claim 1, Wherein one or more protrusions are provided in the exhaust space, and Wherein the one or more protrusions form a plurality of exhaust passages in the exhaust space.
10. 10. The battery pack according to claim 9, Wherein the cell array structure further comprises at least one side structure configured to support and house the battery cells in two directions, and Wherein the protrusions are provided at positions corresponding to the side structures.
11. 11. The battery pack according to claim 1, Wherein the battery pack case further includes an exhaust device in communication with the plurality of exhaust spaces and the outside.
12. 12. The battery pack according to claim 11, Wherein the exhaust device is arranged on a side wall of the battery pack housing, which is far away from the second accommodating space.
13. 13. The battery pack according to claim 12, Wherein the side wall has a side path provided in the side wall that communicates the exhaust device and the plurality of exhaust spaces with each other.
14. 14. The battery pack according to claim 1, The battery pack further includes a sealing member disposed in the close contact region to seal a gap between the cell array structure and the exhaust space corresponding to each other.
15. 15. The battery pack according to claim 14, Wherein the sealing member comprises a flame retardant material.
16. 16. The battery pack according to claim 14, The battery pack further includes a filling member filled in the cell array structure, Wherein the filling member includes an extension portion extending from one side of the cell array structure toward the close contact region, and Wherein the extension constitutes the sealing member.
17. 17. A vehicle comprising at least one battery pack according to any one of claims 1 to 16.

Description

Battery pack and vehicle including the same Technical Field The present disclosure relates to a battery pack, and more particularly, to a battery pack capable of effectively preventing heat propagation when a thermal event occurs in any cell array structure of the battery pack, and a vehicle including the battery pack. The present application is based on and claims priority from korean patent application No.10-2024-0090480 filed on the date of 2024, 7 and 9 to the korean intellectual property office, the disclosure of which is incorporated herein by reference in its entirety. Background Recently, demand for portable electronic products such as laptop PCs, video cameras, and mobile phones has rapidly increased, and development of electric vehicles, energy storage batteries, robots, satellites, and other related technologies has been accelerated. Accordingly, research into a high-performance secondary battery that can be repeatedly charged and discharged is being actively conducted. The secondary batteries commercialized at present include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium ion secondary batteries. Among them, lithium ion secondary batteries have been attracting attention due to their advantages of flexible charge and discharge, due to almost no memory effect, very low self-discharge rate, and high energy density, as compared with nickel-based secondary batteries. These lithium ion secondary batteries generally use a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. Further, the lithium ion secondary battery includes an electrode assembly in which positive and negative electrode plates coated with positive and negative electrode active materials, respectively, and a separator between the positive and negative electrode plates are disposed, and a case that accommodates the electrode assembly and an electrolyte in a sealed manner. Meanwhile, the lithium ion secondary battery may be classified into a pouch type secondary battery in which an electrode assembly is received in a pouch of an aluminum laminate sheet and a can type secondary battery in which an electrode assembly is received in a metal can, according to the shape of a battery case. In addition, can-type secondary batteries can be further classified into cylindrical batteries and prismatic batteries according to the shape of a metal can. These lithium ion secondary batteries are assembled into a compact structure by stacking or laminating a plurality of battery cells themselves or a plurality of battery cells mounted in a case, and then these structures may be electrically connected to constitute a battery module or a battery pack. Recently, active research and development has been made on a battery pack composed of a single module or cell assembly, which improves structural rigidity by vertically and densely stacking a plurality of cylindrical battery cells, and a cell frame surrounding the single module or cell assembly. In particular, to increase the energy capacity, the size of individual modules or cell assemblies increases in terms of their surface area, or the number of individual modules or cell assemblies increases. In a battery pack including such a single module or cell assembly, it is important to completely discharge exhaust gas or the like to the outside rather than to move to another space in order to prevent heat propagation while securing a sufficient discharge path for exhaust gas or the like in the event of thermal runaway. In addition, in the case where a plurality of modules or cell assemblies are provided in the battery pack, it is important that exhaust gas discharged from one module does not flow into another module to prevent heat propagation. Disclosure of Invention Technical problem The present disclosure is designed to solve the problems of the related art, and therefore, it is an object of the present disclosure to provide a battery pack capable of completely and smoothly discharging exhaust gas to the outside when a thermal event occurs, and a vehicle including the battery pack. In addition, the present disclosure is also directed to a battery pack capable of effectively preventing heat propagation between battery cells or a cell array structure, and a vehicle including the same. Further, the present disclosure is also directed to providing a battery pack capable of effectively preventing exhaust gas from flowing into components other than the cell array structure, and a vehicle including the battery pack. Further, the present disclosure is also directed to providing a battery pack capable of effectively preventing occurrence of a secondary thermal event when the thermal event occurs, and a vehicle including the battery pack. Further, the present disclosure is also directed to providing a battery pack capable of preventing exhaust gas discharged from a specific battery cell from