CN-122003771-A - Battery module, battery pack including the same, and vehicle

Abstract

The battery module according to the present invention may include a battery cell assembly including a plurality of battery cells, a module case accommodating the battery cell assembly and having a vent hole provided at one side of the module case such that gas generated in the battery cell is discharged to the outside, a module terminal electrically connected to the battery cell assembly and exposed at the other side of the module case, a fireproof cover member covering an upper end of the battery cell assembly to inhibit upward discharge of gas from the battery cell, and a block member separating a space between one side of the module case and the battery cell assembly such that gas is guided toward the vent hole.

Inventors

• Pu Zhuxun
• JIN XIULIE
• Pu Jizan

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260508

Application Date

20250515

Priority Date

20240619

Claims (15)

1. 1. A battery module, the battery module comprising: A battery cell assembly having a plurality of battery cells; A module case configured to accommodate the battery cell assembly and having a vent hole provided at one side to allow gas generated from the battery cell to be discharged to the outside; a module terminal electrically connected to the cell assembly and exposed to the other side of the module housing; a fire-resistant cover member configured to cover a top end of the cell assembly to inhibit upward discharge of gas from the battery cells, and A block member configured to partition a space between one side of the module case and the cell assembly to guide gas toward the exhaust hole.
2. 2. The battery module according to claim 1, Wherein the fireproof cover member and the block member are formed as one body.
3. 3. The battery module according to claim 1, Wherein the block member is bent and extended from one end of the fireproof cover member.
4. 4. The battery module according to claim 1, Wherein the fireproof cover member is made of a compressible material to fill a space between the top end of the cell assembly and the upper surface of the module case.
5. 5. The battery module of claim 1, further comprising: A bus bar connected with electrode leads respectively provided to the plurality of battery cells, and A bus bar frame configured to support the bus bar and cover a front side or a rear side of the cell assembly.
6. 6. The battery module according to claim 5, Wherein the bus bar frame covering the rear side of the cell assembly faces one side of the module case and has a plurality of through holes through which gas passes.
7. 7. The battery module according to claim 6, Wherein the block member is disposed at an outer side of the bus bar frame and is configured to block gas passing through the through-hole from moving in a direction in which the battery cells are stacked in a space between one side of the module case and the bus bar frame.
8. 8. The battery module according to claim 6, Wherein the block members are provided in plurality such that a plurality of the block members are arranged to be spaced apart along the direction in which the battery cells are stacked.
9. 9. The battery module according to claim 6, Wherein the block member is configured to be elongated in a height direction of the bus bar frame.
10. 10. The battery module according to claim 6, Wherein the block members are provided to be coupled by fitting to block coupling parts formed to protrude from the bus bar frame.
11. 11. The battery module of claim 6, further comprising: An exhaust blocking block disposed in a space between the cell assembly and the bus bar frame, Wherein the battery cell is a pouch-type battery cell, and Wherein the exhaust blocking block is disposed on at least one side of the cell platform where the electrode leads are led out from the battery cells.
12. 12. The battery module according to claim 11, Wherein the exhaust blocking block is configured to pressurize a side surface of the cell platform.
13. 13. The battery module according to claim 11, Wherein the exhaust blocking blocks are provided in plurality at the front side and the rear side of the cell assembly, respectively, and Wherein the cell lands of the plurality of battery cells at the front side of the cell assembly are all compressed by the exhaust blocking block, and a portion of the cell lands of the plurality of battery cells at the rear side of the cell assembly are compressed by the exhaust blocking block.
14. 14. A battery pack comprising the battery module according to any one of claims 1 to 13.
15. 15. A vehicle comprising the battery pack according to claim 14.

Description

Battery module, battery pack including the same, and vehicle Technical Field The present disclosure relates to a battery module, and more particularly, to a battery module for discharging gas or flame in a specific direction when a battery cell is ignited, and a battery pack and a vehicle including the same. The present application claims priority from korean patent application No. 10-2024-0079828 filed in korea at 2024, 6-19, the disclosure of which is incorporated herein by reference. Background Secondary batteries have high applicability according to product groups and electrical characteristics such as high energy density, which are widely used not only in portable devices but also in Electric Vehicles (EVs) or Hybrid Electric Vehicles (HEVs) driven by power sources. These secondary batteries are attracting attention as a new energy source that is environmentally friendly and improves energy efficiency, not only because they can greatly reduce the use of fossil fuels, but also because they do not generate any by-products due to the use of energy. The types of secondary batteries that are widely used at present include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, and nickel zinc batteries. When a high output voltage is required, a plurality of battery cells are connected in series to form a battery module or battery pack. In addition, a plurality of battery cells are connected in parallel to form a battery module or a battery pack in order to increase charge/discharge capacity. Accordingly, the number of battery cells included in the battery module or the battery pack may be variously set according to a desired output voltage or charge/discharge capacity. Generally, the operating voltage of the secondary battery is about 2.5V to 4.5V. Therefore, for example, in an electric vehicle, a battery module is configured by connecting a plurality of secondary batteries in series and/or parallel, and a battery pack is configured by connecting a plurality of battery modules in series or parallel, and the battery pack is used as an energy source. Further, recently, since a large number of battery modules are densely accommodated in a limited inner space, the battery pack has a very high energy density. If a fire occurs in any of these battery modules, gas and flame may propagate to surrounding areas, possibly causing a chain reaction of the fire in adjacent battery modules. Accordingly, a method of delaying or minimizing the propagation of thermal energy between battery modules within a battery pack is considered to be a key problem in preparation for ignition of the battery modules and has been studied in the art. For example, if the direction of gas or flame emitted from the battery module in the event of fire can be controlled, it may be easier to design a battery pack that minimizes the influence of gas or flame on the battery module. Accordingly, there is a need to develop a battery module that can guide gas or flame in a specific direction and safely discharge the gas or flame when a fire occurs in the battery module. Disclosure of Invention Technical problem The present disclosure is designed to solve the problems of the prior art, and therefore, it is an object of the present disclosure to provide a battery module having a directional discharge structure that can stably discharge gas or flame in a specific direction when a battery cell catches fire. The present disclosure is also directed to a battery pack and a vehicle including the battery module. The technical problems the present disclosure seeks to solve are not limited to the above-described problems, and other problems not mentioned above will be clearly understood by those skilled in the art from the description of the present invention described below. Technical proposal In one aspect of the present disclosure, there is provided a battery module including a cell assembly having a plurality of battery cells, a module case configured to accommodate the cell assembly and having a vent hole provided at one side to allow gas generated from the battery cells to be discharged to the outside, a module terminal electrically connected to the cell assembly and exposed to the other side of the module case, a fireproof cover member configured to cover a top end of the cell assembly to inhibit upward discharge of gas from the battery cells, and a block member configured to partition a space between one side of the module case and the cell assembly to guide the gas toward the vent hole. The fireproof cover member and the block member may be formed as one body. The block member may be bent and extended from one end of the fireproof cover member. The fire-resistant cover member may be made of a compressible material to fill a space between the top end of the cell assembly and the upper surface of the module case. The battery module may further include bus bars connected with electrode leads respectively provi