KR-20260067803-A - BATTERY PACK

KR20260067803AKR 20260067803 AKR20260067803 AKR 20260067803AKR-20260067803-A

Abstract

A battery pack is disclosed. A battery pack according to one embodiment of the present invention may include: a base plate; an upper plate coupled to the upper surface of the base plate and extending along the left-right direction, providing a space inside, and having a first inlet hole; a battery module located on the upper plate; and an inner plate located inside the upper plate and extending along the left-right direction, dividing the space provided by the upper plate into an insulating space and a venting space.

Inventors

이상준
강종모
권현수
노용환
박신영
서성원
안문열
황태원

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (12)

Base plate; An upper plate coupled to the upper surface of the base plate and extending along the left-right direction, providing a space inside, and having a first inlet hole; A battery module located on the upper plate above; and, A battery pack comprising an inner plate located inside the upper plate and extending along the left-right direction, which divides the space provided by the upper plate into an insulating space and a venting space.
In Article 1, The inner plate above is: A front inclined portion extending upward from the upper surface of the base plate; A support member extending rearward from the above-mentioned front inclined portion; and, A battery pack including a rear inclined portion extending downward from the support portion and coupled to the upper surface of the base plate.
In Article 2, The above-mentioned insulation space is, A battery pack formed between the rear inclined portion and the upper plate.
In Article 2, The above venting space is: A first venting space formed between the front inclined portion and the upper plate; and, A battery pack including a second venting space formed inside the inner plate.
In Paragraph 4, The above-mentioned first inlet hole is, A battery pack that connects the first venting space and the outside of the upper plate.
In Paragraph 4, The inner plate above is, A battery pack having a second inlet hole that connects the first venting space and the second venting space.
In Article 6, A battery pack further comprising a flow guide coupled to the upper surface of the base plate and passing through the second inlet hole.
In Paragraph 4, A battery pack further comprising a venting device disposed inside the second venting space.
In Article 2, The above support member is, A battery pack in contact with the upper plate above.
In Article 1, A battery pack in which the length of the upper plate and the length of the inner plate are substantially the same.
In Article 1, A battery pack further comprising a side plate coupled to one side of the upper plate and one side of the inner plate.
An automobile comprising a battery pack according to any one of claims 1 to 11.

Description

Battery Pack The present invention relates to a battery pack. As the demand for portable electronic products such as smartphones, tablet PCs, and smartwatches increases significantly and electric vehicles become increasingly widespread, research on batteries installed in them, particularly secondary batteries capable of repeated charging and discharging, is actively underway. Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density. These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and an outer casing, namely a battery case, that seals and houses the electrode assembly together with an electrolyte. Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet. Recently, secondary batteries are widely used for driving or energy storage not only in small devices such as portable electronic devices but also in medium-to-large devices such as electric vehicles and Energy Storage Systems (ESS). A single battery module can be formed by housing multiple such secondary batteries together inside a module case while electrically connected. In this case, each secondary battery included in a single battery module can be referred to as a battery cell. Furthermore, multiple such battery modules can be connected to form a single battery pack. However, when a battery pack contains multiple battery modules, and each module contains multiple battery cells, it may be vulnerable to thermal chain reactions between modules or cells. For example, if an event such as thermal runaway occurs within a single battery module, it is necessary to suppress the propagation of this runaway to other battery modules or cells. If the propagation of thermal runaway between modules or cells is not properly suppressed, an event originating in a specific module or cell may trigger a chain reaction of thermal reactions in other modules or cells, potentially causing explosions or fires, or significantly amplifying their scale. In particular, if an event such as thermal runaway occurs in a single battery module, gases or flames may be randomly released to the outside. If the release of such gases or flames is not properly controlled, they may be released toward other battery modules, potentially causing a thermal chain reaction in those modules. Specifically, module terminals may be located on the front side of a battery module to provide electrical connections to other battery modules or battery packs, such as module busbars. Therefore, if flames are released toward the front of such a battery module, they can damage the module terminals within the battery pack and cause an electrical short circuit. Furthermore, since other battery modules may be located in front of a specific battery module, if flames are released toward the front of that module, the emitted flames may spread toward other modules, making it easy for fire to spread between battery modules. If thermal propagation between battery modules or between battery cells is not properly controlled, a rapid voltage drop in the battery module or battery pack may occur. This can lead to a sudden shutdown of the device equipped with the battery module or battery pack, causing unexpected damage. For example, if a sudden voltage drop in the battery pack occurs while an electric vehicle is in operation, there may not be enough time to move the electric vehicle to a safe location. Furthermore, if thermal propagation between battery modules or battery cells is not properly controlled and a fire or explosion occurs suddenly, there is a high possibility of causing casualties to users. For example, if thermal runaway occurs in an electric vehicle and a certain amount of time is not secured before it progresses into a full-scale fire, the occupants may not be able to escape safely. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the m