KR-20260067138-A - TEST BATTERY PACK

KR20260067138AKR 20260067138 AKR20260067138 AKR 20260067138AKR-20260067138-A

Abstract

A test battery pack is disclosed. A test battery pack according to one embodiment of the present invention may include a case having a front wall and providing an internal space; a battery cell located inside the case; a first pipe installed on the outer surface of the front wall; and a venting device installed on the pipe.

Inventors

한승민
김광모
정혜미

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (10)

A case that provides space inside and is equipped with a front wall; A battery cell located inside the above case; A first pipe installed on the outer surface of the front wall; and, A test battery pack including a venting device installed in the above pipe.
In Article 1, The above-mentioned first pipe is, A test battery pack communicating with the interior of the above case.
In Article 1, The above venting device is, A test battery pack installed at the outer end of the first pipe.
In Article 1, The above case is: A base plate on which the above-mentioned front wall is installed; A rear wall installed on the above base plate; A first side wall installed on the above base plate; and, It includes a second side wall installed on the base plate and facing the first side wall, The above test battery pack is, A test battery pack further comprising a first partition wall installed on the base plate and extending in the front-rear direction.
In Paragraph 4, A test battery pack further comprising a second pipe installed on the outer surface of the rear wall.
In Paragraph 4, The gap between the first side wall and the first partition wall is, A test battery pack configured to be larger than the gap between the second side wall and the first partition wall.
In Article 6, Between the first partition wall and the second side wall, A test battery pack consisting of empty space.
In Article 6, The above battery cell is, A test battery pack located between the first side wall and the first partition wall.
In Article 6, A test battery pack further comprising a second partition wall located between the first side wall and the first partition wall and extending in the left-right direction.
In Article 6, A test battery pack further comprising a block located between the first side wall and the first partition wall.

Description

Test Battery Pack The present invention relates to a test 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. Therefore, to ensure the stability of battery modules or battery packs, it is necessary to test various design conditions. Consequently, a test battery pack is required that allows various design parameters to be changed with simple operations. The following drawings attached to this specification illustrate preferred embodiments of the present invention