Built-in automatic fire extinguishing device for battery compartment of electric vehicle

Abstract

The utility model discloses a built-in automatic fire extinguishing device for a battery compartment of an electric vehicle, which comprises the battery compartment of the electric vehicle, a liquid carbon dioxide steel cylinder, a multidirectional displacement sensor and a high-speed direct-current fuse are arranged in the battery compartment, the liquid carbon dioxide steel cylinder and the multidirectional displacement sensor are fixed in the battery compartment, and the high-speed direct-current fuse is fixed in the battery compartment. A displacement signal output end of the multidirectional displacement sensor is connected with a quick valve of the liquid carbon dioxide steel cylinder, the other movable end of the multidirectional displacement sensor is connected with the high-speed direct-current fuse, the high-speed direct-current fuse is fixed in the battery compartment, one end of the high-speed direct-current fuse is connected with a cathode of the battery pack, and the other end of the high-speed direct-current fuse is connected with a ground bus of the battery And two movable ends of the multidirectional displacement sensor are controlled to be linked through a spring. The built-in automatic fire extinguishing device for the battery compartment of the electric vehicle is fully automatically triggered, carbon dioxide gas is quickly released, high-power and ultrahigh-temperature direct-current arcs or open fire is effectively cut off, and the built-in automatic fire extinguishing device has very high practical value and popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of an automatic fire extinguishing device built into a battery compartment of an electric vehicle, in particular to an automatic fire extinguishing device built into a battery compartment of an electric vehicle. Background Art

[0002] With the development of the electric vehicle industry and the increasing number of various electric vehicles (new energy vehicles) in society, electric vehicle traffic accidents are common. Most of the vehicles involved in these accidents are caused by electrical short circuits after collisions, which can lead to fires, combustion, and explosions. This causes serious injuries to the drivers and passengers of electric vehicles, as well as significant loss of life and property, and severely impacts social traffic order. Besides human error, the root causes of electric vehicle accidents are serious safety flaws in the vehicles: 1. The high-power battery packs in electric vehicles lack effective means to quickly extinguish short-circuit arcs at the power outlet in the event of a collision. The high-temperature arcs exceeding 8,000 degrees Celsius generated by short-circuit currents are the primary cause of fires in electric vehicles; 2. There are no effective measures or means to prevent short-circuit currents from flowing through the internal resistance of the battery, leading to overheating and explosions; 3. There is no automatic firefighting device to quickly extinguish arcs and fires in the event of a collision.

[0003] In response to these safety hazards currently faced by electric vehicles, it is urgent to develop a fully automatic arc extinguishing and fire extinguishing device that can quickly and effectively cut off high-power, ultra-high-temperature DC arcs. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic fire extinguishing device built into the battery compartment of an electric vehicle to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The utility model discloses an automatic fire extinguishing device built into the battery compartment of an electric vehicle, comprising a battery compartment of the electric vehicle. A liquid carbon dioxide cylinder, a multi-directional displacement sensor, and a high-speed DC fuse are arranged in the battery compartment. The liquid carbon dioxide cylinder and the multi-directional displacement sensor are fixed in the battery compartment. A displacement signal output end of the multi-directional displacement sensor is connected to a quick valve of the liquid carbon dioxide cylinder. The hollow inner cavity of the high-speed DC fuse is pre-filled with carbon dioxide liquid. The high-speed DC fuse is fixed in the battery compartment, with one end connected to the negative electrode of the battery pack and the other end connected to the ground bus of the battery pack.

[0007] As an improvement, the four movable ends of the two sets of wedge-shaped structures of the multi-directional displacement sensor are connected to the inner wall of the battery compartment by bolts to detect impact deformation, control and drive the high-pressure outlet valve on the liquid carbon dioxide cylinder to automatically extinguish fire and arc, or use low-temperature carbon dioxide gas at minus ten degrees Celsius to protect the batteries in the battery compartment to prevent secondary fire, combustion or explosion, thereby protecting the safety of people in the accident vehicle.

[0008] The advantages of the present invention over the prior art are that when the battery pack in the battery compartment is short-circuited or catches fire, the high-speed DC fuse is burned out, and the four movable ends of the two sets of wedge-shaped structures of the multi-directional displacement sensor are connected to the inner wall of the battery compartment by bolts to detect impact deformation, control and drive the high-pressure outlet valve on the liquid carbon dioxide cylinder to automatically extinguish the fire and arc, or use low-temperature carbon dioxide gas at minus ten degrees Celsius to extinguish the arc or open flame in the battery compartment, thereby protecting the batteries in the battery compartment from secondary fire, combustion or explosion.

[0009] This automatic fire extinguishing device built into the battery compartment of an electric vehicle is automatically triggered, quickly releases carbon dioxide gas, and effectively cuts off high-power, ultra-high-temperature DC arcs or open flames, and has high practical value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings listed below are only some structural schematic diagrams of the present invention, not all of them.

[0011] Figure 1 The utility model is a structural schematic diagram of an automatic fire extinguishing device built into a battery compartment of an electric vehicle.

[0012] Figure 2 The utility model is a schematic structural diagram of a multi-directional displacement sensor of an automatic fire extinguishing device built into a battery compartment of an electric vehicle.

[0013] Figure 3 This is the logic principle diagram of the multi-directional displacement sensor.

[0014] Figure 4 It is a cross-sectional view of a high-speed DC fuse.

[0015] Figure 5 It is a structural diagram of a high-speed DC fuse.

[0016] Reference numerals:

[0017] Battery compartment 1; Liquid carbon dioxide cylinder 2; Multi-directional displacement sensor 3; High-speed DC fuse 4; DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0020] Furthermore, the use of terms such as "first," "second," and "third" is intended solely to distinguish descriptions and should not be construed as indicating or implying relative importance. The use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that a component must be absolutely horizontal or overhanging; rather, a slight tilt is permitted. For example, "horizontal" simply refers to a direction that is more horizontal than "vertical," not to implying that the structure must be perfectly horizontal; rather, a slight tilt is permitted.

[0021] In the description of the embodiments of the present invention, if the terms "multiple" or "several" appear, they represent at least two.

[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] This embodiment combines the attached Figures 1 to 5 , a detailed description is given of an automatic fire extinguishing device built into the battery compartment of an electric vehicle.

[0024] This embodiment provides an automatic fire extinguishing device built into the battery compartment of an electric vehicle, including a battery compartment 1 of the electric vehicle. A liquid carbon dioxide cylinder 2, a multi-directional displacement sensor 3, and a high-speed DC fuse 4 are provided within the battery compartment 1. The liquid carbon dioxide cylinder 2 and the multi-directional displacement sensor 3 are fixed within the battery compartment 1. A displacement signal output end of the multi-directional displacement sensor 3 is connected to the quick valve of the liquid carbon dioxide cylinder 2. The hollow inner cavity of the high-speed DC fuse 4 is pre-filled with carbon dioxide liquid. The high-speed DC fuse 4 is fixed within the battery compartment 1, with one end connected to the negative electrode of the battery pack and the other end connected to the ground bus of the battery pack.

[0025] The four movable ends of the two groups of wedge-shaped structures of the multi-directional displacement sensor 3 are connected to the inner wall of the battery compartment 1 through bolts to detect impact deformation, control and drive the high-pressure outlet valve on the liquid carbon dioxide cylinder 2 to automatically extinguish fire and arc, or use low-temperature carbon dioxide gas at minus ten degrees Celsius to protect the batteries in the battery compartment 1 from secondary fire, combustion or explosion, thereby protecting the safety of people in the accident vehicle.

[0026] In specific implementation, when the battery pack current in the battery compartment 1 is short-circuited or catches fire, the high-speed DC fuse 4 is burned out, and the four movable ends of the two groups of wedge-shaped structures of the multi-directional displacement sensor 3 are connected to the inner wall of the battery compartment 1 through bolts to detect impact deformation, control and drive the high-pressure outlet valve on the liquid carbon dioxide cylinder 2 to automatically extinguish the fire and arc, or use low-temperature carbon dioxide gas of more than ten degrees below zero to extinguish the arc or open flame in the battery compartment 1, thereby protecting the batteries in the battery compartment 1 from secondary fire, combustion or explosion.

[0027] The above description of the present invention and its embodiments is non-limiting and does not limit the scope of protection. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed by this utility model should be included in the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be based on the scope of protection of the claims.

Claims

1. An automatic fire extinguishing device built into the battery compartment of an electric vehicle, characterized in that: The invention comprises a battery compartment (1) of an electric vehicle, wherein a liquid carbon dioxide cylinder (2), a multi-directional displacement sensor (3), and a high-speed DC fuse (4) are arranged in the battery compartment (1), wherein the liquid carbon dioxide cylinder (2) and the multi-directional displacement sensor (3) are fixed in the battery compartment (1), wherein a displacement signal output end of the multi-directional displacement sensor (3) is connected to a fast valve of the liquid carbon dioxide cylinder (2), wherein a hollow inner cavity of the high-speed DC fuse (4) is pre-filled with carbon dioxide liquid, and wherein the high-speed DC fuse (4) is fixed in the battery compartment (1), wherein one end of the high-speed DC fuse is connected to the negative electrode of the battery pack, and the other end of the high-speed DC fuse is connected to the ground bus of the battery pack.

2. The electric vehicle battery compartment built-in automatic fire extinguishing device according to claim 1, characterized in that: The four movable ends of the two wedge-shaped structures of the multi-directional displacement sensor (3) are connected to the inner wall of the battery compartment (1) through bolts to detect impact deformation, control and drive the high-pressure outlet valve on the liquid carbon dioxide cylinder (2) to automatically extinguish fire and arc, or use carbon dioxide gas at a temperature of more than ten degrees below zero to protect the batteries in the battery compartment (1) from secondary fire, combustion or explosion, thereby protecting the safety of people in the accident vehicle.

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