KR-102960919-B1 - System for automatic removal of the battery in case of electric vehicle fire

Abstract

The present invention provides an automatic battery removal system that, in the event of an electric vehicle fire, automatically removes the battery from the vehicle body under certain conditions to help effectively extinguish the fire by cooling the battery through immersion. To this end, the present invention provides an automatic battery removal system for electric vehicle fires, comprising a battery (1) mounted on the lower body of an electric vehicle and a fastening means (2) for connecting the battery (1) to the lower body of the electric vehicle, wherein the fastening means (2) includes a thermoplastic material part (23) that deforms and breaks at a temperature above a certain level in the event of a fire in the electric vehicle.

Inventors

• 이서한

Assignees

• 주식회사 호원

Dates

Publication Date

20260507

Application Date

20231004

Claims (5)

1. A system that allows the battery (1) to be automatically removed from the vehicle body in the event of an electric vehicle fire, thereby facilitating cooling and fire suppression. A battery (1) mounted on the lower part of the vehicle body, and It is configured to include a fastening means (2) for connecting the above battery (1) to the lower part of the vehicle body, and The above fastening means (2) is, bolt head part (20), and A first shaft portion (21) extending from the above bolt head portion (20), and A second shaft (22) connected to the first shaft (21) and coupled to the vehicle body, and An automatic battery removal system for electric vehicle fires, characterized by comprising a thermoplastic material part (23) that connects the first shaft part (21) and the second shaft part (22) and causes the battery (1) to be removed from the vehicle body by deforming and breaking at a temperature above a certain level in the event of a fire in the electric vehicle.
2. delete
3. In paragraph 1, The above thermoplastic material part (23) forms a sleeve shape, and With a sleeve-shaped thermoplastic material part (23) fitted to each end of the first shaft part (21) and the second shaft part (22), A first pin (31) is installed that penetrates the thermoplastic material part (23) and the first shaft part (21), and An automatic battery removal system for electric vehicle fires, characterized in that a second pin (32) is installed penetrating the thermoplastic material part (23) and the second shaft part (22), so that the first shaft part (21) and the second shaft part (22) remain connected.
4. In paragraph 3, The above thermoplastic material part (23) is, An automatic battery removal system for electric vehicle fires characterized by comprising at least one of polyacetal, polyvinylidene chloride, polyvinyl chloride, polyimide, polybenzimidazole, and polyethylene naphthalene acid.
5. A system that allows the battery (1) to be automatically removed from the vehicle body in the event of an electric vehicle fire, thereby facilitating cooling and fire suppression. A battery (1) mounted on the lower part of the vehicle body, and It is configured to include a fastening means (2) for connecting the above battery (1) to the lower part of the vehicle body, and The above fastening means (2) includes a thermoplastic material part (23) that deforms and breaks at a temperature above a certain level in the event of a fire in the electric vehicle, thereby causing the battery (1) to be removed from the vehicle body. A reinforcing material (40) made of metal is provided inside the above thermoplastic material part (23) for strength reinforcement, and The above reinforcing material (40) is characterized by being formed in a cylindrical shape and bonded to the thermoplastic material part (23) through insert injection, in an automatic battery removal system for electric vehicles in case of fire.

Description

Automatic battery removal system in case of electric vehicle fire The present invention is intended to ensure safety in the event of a battery fire in an electric vehicle, and more specifically, it relates to a technology that enables the battery to be automatically detached from the vehicle body under predetermined temperature conditions when a battery fire occurs in an electric vehicle, thereby helping to ensure the safety of the driver and others and prevent the spread of fire. Generally, electric vehicles are eco-friendly vehicles that run on batteries and are known to have a lower risk of fire compared to vehicles using conventional fuel. However, electric vehicle batteries can catch fire due to causes such as overcharging, over-discharging, or collisions, and when this happens, the battery temperature rises so high that it is difficult to extinguish the fire using conventional firefighting methods. Accordingly, referring to FIGS. 1 and 2, it is known that in the event of an electric vehicle battery fire, a method of cooling the battery by completely submerging it by spraying water so that the water fills up to the battery fixed to the underside of the vehicle body is effective. In these current electric vehicles, the battery is fixed to the underside of the vehicle body, making it difficult to easily remove in the event of a fire. Consequently, a large amount of water is required to immerse the battery while it remains attached to the body without it being detached. In other words, considering that the minimum ground clearance of the vehicle body is generally 180 to 220 mm, in order to fill the coolant tank with water up to a height (H) where the battery fixed to the vehicle body is sufficiently submerged, an additional amount of water must be added to the coolant tank, taking into account at least the minimum ground clearance of 180 to 220 mm, compared to the state where the battery is detached from the vehicle body and placed on the floor. Therefore, there is a problem in that, in order to completely submerge and cool a battery fixed to the underside of the vehicle body, a larger amount of water must be injected as the water level increases in proportion to the minimum ground clearance, and it also takes more time to completely submerge the battery in proportion to the minimum ground clearance. In other words, the battery mounting structure of existing electric vehicles requires the battery to be completely submerged in water to cool and extinguish the fire while fixed to the underside of the vehicle body. However, there is a problem in that the minimum water level required for the battery to be submerged rises in proportion to the vehicle's lowest ground clearance, making it disadvantageous for fire suppression. FIG. 1 is a side view of an electric vehicle schematically illustrating the battery mounting location. Figure 2 is a reference photo showing an example of battery cooling and extinguishing through vehicle submersion of a conventional electric vehicle. FIG. 3 is a comparative diagram showing the water level for complete battery submersion in a conventional electric vehicle and the water level for complete battery submersion following battery removal in an electric vehicle to which the present invention is applied. FIG. 4 is an exploded perspective view showing the configuration of an automatic battery removal system in the event of an electric vehicle fire according to the present invention, and the state when the battery is fastened to the vehicle body using a fastening means constituting the automatic battery removal system according to the present invention. FIG. 5 is an exploded perspective view of the fastening means of FIG. 4. FIG. 6 is a cross-sectional view showing the state after coupling of the fastening means of FIG. 5. FIG. 7 is a cross-sectional view showing another embodiment of the fastening means of the present invention. Hereinafter, embodiments of the present invention will be examined in detail with reference to the attached drawings. In the following description, identical identification symbols denote identical configurations, and unnecessary redundant descriptions and descriptions of known technologies are omitted. Furthermore, descriptions of each embodiment of the present invention below that overlap with the description of the technology forming the background of the invention are also omitted. Meanwhile, in the description of the present invention, it is assumed that the term "battery of an electric vehicle" is used in the sense of a battery pack including a battery case, and the battery pack includes components such as a battery module and a battery management system (BMS); it is also understood that individual components, such as a battery case or a battery module, may be mentioned separately as necessary. [Example 1] First, referring to FIGS. 3 to 6, the present invention is a system that allows a battery (1) to be automatically removed from the vehicle body in t