KR-102964046-B1 - Apparatus of suppressing fire for battery pack using frame of car

Abstract

A battery pack fire suppression device utilizing a vehicle body frame is presented, which suppresses a fire in its early stages by rapidly impregnating the battery pack with a fire extinguishing agent and prevents the fire from spreading to the surrounding area. The device includes a vehicle body frame in which a fire extinguishing agent is stored in an internal space, and a connecting pipe equipped with a fire extinguishing valve for supplying the fire extinguishing agent to a battery pack positioned at the bottom of the vehicle body frame.

Inventors

• 강찬호
• 함용석

Assignees

• 주식회사 소디스

Dates

Publication Date

20260513

Application Date

20240124

Claims (9)

1. A vehicle body frame divided into a crossbar and a vertical bar, wherein a fire extinguishing agent is stored in the internal space of the crossbar and the vertical bar; A first injection port provided on the upper crossbar of the above crossbar for injecting the above digestive fluid; An air vent provided at a position higher than the first injection port on the upper crossbar to discharge the extinguishing liquid to the outside when the extinguishing liquid injected through the first injection port overflows; and A battery pack fire suppression device using a vehicle body frame comprising a connecting pipe equipped with a fire extinguishing valve for supplying the fire extinguishing liquid to a battery pack disposed at the lower part of the vehicle body frame.
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4. A battery pack fire suppression device using a vehicle body frame, characterized in that, in claim 1, the crossbars and verticalbars are drilled holes to interconnect the internal spaces.
5. A battery pack fire suppression device using a vehicle body frame, characterized in that, in claim 1, the vehicle body frame is equipped with an emergency button for responding to emergency situations.
6. A battery pack fire suppression device using a vehicle body frame, characterized in that, in claim 1, the vehicle body frame includes a second injection port into which a fire extinguishing liquid is injected by an external device.
7. A battery pack fire suppression device using a vehicle body frame, characterized in that, in the first aspect, a melting plug is installed on the lower crossbar of the vehicle body frame in the portion facing the battery pack.
8. A battery pack fire suppression device using a vehicle body frame, characterized in that, in claim 1, a pack frame on which the battery pack is mounted is attached to the lower crossbar of the crossbar.
9. A battery pack fire suppression device using a vehicle body frame, characterized in that, in claim 8, the pack frame is sealed with a case.

Description

Battery pack fire suppression apparatus using car frame The present invention relates to a fire suppression device, and more specifically, to a battery pack fire suppression device that suppresses a battery pack fire of an electric vehicle in the early stages by utilizing a vehicle body frame as a fire extinguishing liquid storage tank. Electric vehicles are largely composed of an electric motor, a high-voltage battery, and a power converter (inverter). High-voltage batteries, such as lithium batteries, prevent fires by blowing fuses or disconnecting relays connected to the inverter in the event of an internal short circuit or overcurrent. However, if a lithium battery is overcharged, exposed to high temperatures (>180°C), or subjected to external impact, the structure of the metal oxide layer collapses, causing a thermal runaway phenomenon that ignites and progresses into a fire. During this thermal runaway process, a large amount of oxygen is released, generating flammable gases that cause the lithium battery to burn. Since lithium batteries generate the oxygen necessary for a fire themselves, extinguishing the fire is very difficult; furthermore, because cooling of surrounding cells is required, a method of continuously suppressing the fire with large amounts of water is primarily used. Various methods for extinguishing fires in electric vehicles have been proposed in French patent application No. FR298770 and Korean published patent No. 2022-8986, such as suffocating with a cover, immersing in a simple water tank, or directly extinguishing the fire by spraying extinguishing liquid through a nozzle. Recently, a direct extinguishing method using a nozzle has emerged to enable easy portability and mobility while allowing for complete suppression. However, conventional extinguishing methods make it difficult to suppress the fire in its early stages because a cover, a simple water tank, and a fire extinguisher must be prepared at the scene of the fire. While it is desirable to suppress the fire in its early stages, even if the fire is not completely extinguished, it must be prevented from spreading to the surrounding area. To suppress the fire in its early stages, it is necessary to impregnate the battery pack with extinguishing liquid in a short period of time. FIG. 1 is a perspective view illustrating a fire suppression device according to the present invention. Figure 2 is a front view of Figure 1 seen from the front. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. The embodiments described below may be modified in various different forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. In the drawings, exaggerated representations have been used for convenience of explanation. Meanwhile, terms indicating location, such as top, bottom, front, etc., are related only to what is shown in the drawings. In practice, the fire suppression device can be used in any optional direction, and the spatial direction changes depending on the direction and rotation of the fire suppression device during actual use. An embodiment of the present invention presents a battery pack fire suppression device that utilizes a vehicle body frame as a fire extinguishing liquid reservoir to rapidly impregnate the battery pack with the fire extinguishing liquid, thereby suppressing the fire in its early stages and preventing it from spreading to the surrounding area. To this end, we will examine in detail the fire suppression device comprising the vehicle body frame as a fire extinguishing liquid reservoir, and then describe in detail the process of suppressing a fire in the battery pack in its early stages by utilizing the fire extinguishing liquid reservoir. The battery pack according to the embodiment of the present invention utilizes a high-voltage battery, such as a lithium battery, and is adopted as a power source for an electric vehicle. FIG. 1 is a perspective view for explaining a fire suppression device (100) according to an embodiment of the present invention, and FIG. 2 is a front view of FIG. 1 taken from the front. However, it is not a drawing in the strict sense, and for convenience of explanation, there may be components not shown in the drawing. Referring to FIGS. 1 and 2, a fire suppression device (100) is applied to an electric vehicle (EV) that uses electricity as a power source, and the electric vehicle (EV) includes a body frame (10), a battery pack (BP), a pack frame (30), and wheels (WH). The body frame (10) forms the framework of the electric vehicle (EV) and is composed of a crossbar (11) and a vertical bar (12). The crossbar (11) is divided into an upper crossbar (11a) and a lower crossbar (11b) with the vertical bar (12) in between. A fire extinguishing liquid (EG) is st