Spontaneous combustion protection device for battery car
By installing aerosol fire extinguishers inside the battery compartment of electric bicycles and using a hot-melt rope activation device, the problem of inconvenient fire extinguisher carrying is solved when electric bicycles spontaneously combust, enabling rapid spontaneous fire extinguishing of electric bicycles and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-03-31
AI Technical Summary
When an electric bicycle spontaneously combusts, existing fire extinguishers are inconvenient to carry and can only be used after the source of the fire has been discovered, posing a safety hazard.
An aerosol fire extinguisher is installed in the battery compartment of the electric vehicle and connected to a weight via a thermocouple. When the battery becomes hot or catches fire, the thermocouple breaks, the weight falls and activates the aerosol fire extinguisher, automatically extinguishing the fire.
It enables rapid and spontaneous fire extinguishing in the event of spontaneous combustion of electric vehicles, improving safety and fire extinguishing efficiency, and reducing the dangers caused by fire.
Smart Images
Figure CN224056505U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric vehicle technology, specifically to a self-ignition protection device for electric vehicles. Background Technology
[0002] With the popularization of low-carbon travel, there are more and more electric vehicles on the road, and to some extent, electric vehicles are more convenient than cars, so they are becoming more and more popular.
[0003] During the daily use of electric bicycles, spontaneous combustion occasionally occurs. After analysis, there are three main reasons for spontaneous combustion: first, spontaneous combustion caused by short circuit due to aging wiring; second, spontaneous combustion caused by high temperature; and third, spontaneous combustion caused by impact to the battery.
[0004] Regardless of the type of spontaneous combustion, timely firefighting of electric bicycles is necessary. In current technology, people often use fire extinguishers to put out fires on electric bicycles. Since the fire on an electric bicycle mainly originates from the battery, if the battery can be extinguished in the early stages of the fire, it can be put out quickly. However, in current technology, very few people carry fire extinguishers with them, and people can only use fire extinguishers after discovering the fire source. If no one discovers the fire, such as if it starts at night, it will be extremely dangerous. Utility Model Content
[0005] To address the aforementioned problems, this utility model provides a battery-powered vehicle self-ignition protection device to solve the problem that in the prior art, battery-powered vehicle users are usually inconvenient to carry fire extinguishers, making battery fires quite dangerous.
[0006] This utility model is achieved using the following technical solution: a battery-powered vehicle self-ignition protection device, comprising a battery compartment and a top cover fixedly installed on the top of the battery compartment. A battery is fixedly installed inside the battery compartment, and an aerosol fire extinguisher is also fixedly installed inside the battery compartment. The aerosol fire extinguisher is located below the battery, and a push-button switch capable of activating the aerosol fire extinguisher is provided at the top right side of the aerosol fire extinguisher. There is also a thermoplastic rope inside the battery compartment, with one end of the thermoplastic rope fixedly connected to a weight at the other end. The weight is located directly above the push-button switch. When the thermoplastic rope melts, the weight will strike the push-button switch to activate the aerosol fire extinguisher.
[0007] By placing the aerosol fire extinguisher inside the battery compartment and then controlling the weight with a thermoplastic rope, when the battery becomes hot or catches fire, the thermoplastic rope is burned through, and the weight falls onto the push-button switch to squeeze it, thereby activating the aerosol fire extinguisher to extinguish the fire in the battery. With this device, the fire extinguishing process is spontaneous, faster, and more efficient, improving the safety of using electric vehicles.
[0008] Preferably, a partition plate dividing the battery compartment into upper and lower spaces is fixedly installed between the battery and the aerosol fire extinguisher. The partition plate is fixedly installed in the middle of the battery compartment, and a mounting sleeve for the built-in aerosol fire extinguisher is fixedly installed on the lower surface of the partition plate. A through hole for a weight to pass through is provided on the right side of the partition plate. A first mounting plate vertically arranged along the front-to-back direction on the left and right sides of the battery, and a second mounting plate vertically arranged along the left-to-right direction on the front and rear sides of the battery are fixedly installed on the upper surface of the partition plate. The partition plate, the first mounting plate, the second mounting plate, and the mounting sleeve ensure greater stability in both the installation of the battery and the aerosol fire extinguisher.
[0009] Preferably, the aerosol fire extinguisher is equipped with an aerosol nozzle. A guide tube is fixedly connected to and connected to the aerosol nozzle. The end of the guide tube away from the aerosol fire extinguisher extends upwards from the left side of the partition plate, passing through the partition plate and reaching above the battery. The end of the guide tube away from the aerosol fire extinguisher has a guide nozzle, which extends from the left side above the battery towards the right side. This design of the guide tube and guide nozzle allows the aerosol generated by the aerosol fire extinguisher to be blown towards the battery from one side above it, ensuring that the aerosol fully covers the battery, preventing further combustion and improving the fire extinguishing effect.
[0010] Preferably, a limiting post is fixedly installed on the first mounting plate on the left side, and the end of the thermocouple away from the weight is fixedly connected to the limiting post. The weight is located on the right side of the battery. This structural design ensures that regardless of whether the battery on the left, middle, or right side catches fire first, the thermocouple will burn through quickly, resulting in a faster response time.
[0011] Preferably, a sliding sleeve is fixedly connected to the left side of the partition plate, a weight is located inside the sliding sleeve and slides in cooperation with the sliding sleeve, the bottom end of the sliding sleeve extends through the through hole to the bottom of the partition plate and is in contact with the aerosol fire extinguisher, and the push switch is located at the bottom of the sliding sleeve. The sliding sleeve design allows the weight to accurately strike the push switch.
[0012] Preferably, a pad is fixedly installed on the first mounting plate on the right side, and the thermosetting cord is in contact with the pad, with the contact surface between the pad and the thermosetting cord being an arc surface. The pad prevents the thermosetting cord from being cut by the corners of the battery.
[0013] Preferably, the pad has a limiting groove in the middle, and the hot melt rope is located in the limiting groove. The limiting groove can prevent the hot melt rope from swaying left and right.
[0014] Preferably, the front and rear ends of the first mounting plate are fixedly connected to the battery compartment, and the left and right ends of the second mounting plate are respectively fixedly connected to the inner sides of the left and right first mounting plates, with a gap between the second mounting plate and the battery compartment. This gap allows the battery compartment to have a certain buffer space during a collision, thereby reducing damage to the battery.
[0015] Preferably, a connecting ring is fixedly installed above the weight, and the hot-melt rope is fixedly connected to the connecting ring. The connecting ring facilitates the connection between the weight and the hot-melt rope.
[0016] Preferably, the aerosol fire extinguisher includes an outer shell, with an inner liner fixedly installed inside the outer shell. The inner liner divides the aerosol fire extinguisher into left and right areas. A piezoelectric igniter is fixedly installed in the right area, with a pressing head on the top of the piezoelectric igniter abutting against a pressing switch. The pressing switch slides in cooperation with the outer shell. The left area contains a first solid extinguishing agent and a second solid extinguishing agent from right to left. The output end of the piezoelectric igniter extends into the left area and connects with the first solid extinguishing agent. An aerosol nozzle is provided at the leftmost end of the aerosol fire extinguisher.
[0017] In summary, the beneficial effects of this utility model are as follows:
[0018] By adding an aerosol fire extinguisher inside the battery compartment and attaching a weight to the battery via a thermocouple, when the battery catches fire, the thermocouple breaks, and the weight falls onto the push-button switch of the aerosol fire extinguisher, thus activating the extinguisher to put out the fire. This method of extinguishing fires spontaneously, responds quickly, and is safer and more reliable. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the battery compartment structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the structure of this utility model after the top cover has been removed;
[0021] Figure 3 This is a schematic diagram of the internal structure of the battery compartment;
[0022] Figure 4 for Figure 3 The main view;
[0023] Figure 5 for Figure 4 A cross-sectional view of the "AA" position in the middle;
[0024] Figure 6 A top view of an aerosol fire extinguisher;
[0025] Figure 7 for Figure 6 A cross-sectional view of the "BB" position in the middle.
[0026] In the diagram: 1-Battery compartment; 2-Top cover; 3-Battery; 4-First mounting plate; 5-Guide pipe; 6-Heat-fused rope; 7-Padded block; 8-Limiting groove; 9-Weight block; 10-Sliding sleeve; 11-Divider plate; 12-Second mounting plate; 13-Guide nozzle; 14-Limiting post; 15-Connecting ring; 16-Mounting sleeve; 17-Fixing plate; 18-Push-button switch; 19-Piezoelectric igniter; 20-Outer shell; 21-First solid extinguishing agent; 22-Second solid extinguishing agent; 23-Aerosol nozzle; 24-Inner lining; 25-Aerosol fire extinguisher. Detailed Implementation
[0027] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0028] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0029] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.
[0030] like Figures 1 to 5 As shown, this utility model provides a battery-powered vehicle self-ignition protection device, including a battery compartment 1 and a top cover 2 fixedly installed on the top of the battery compartment 1. A battery 3 is fixedly installed inside the battery compartment 1, and an aerosol fire extinguisher 25 is also fixedly installed inside the battery compartment 1, located below the battery 3. Specifically, a partition plate 11 is fixedly installed between the battery 3 and the aerosol fire extinguisher 25, dividing the battery compartment 1 into upper and lower spaces. The partition plate 11 is fixedly installed in the middle of the battery compartment 1, and an installation sleeve 16 is fixedly installed on the lower surface of the partition plate 11. The aerosol fire extinguisher 25 is fixedly installed inside the installation sleeve 16. A through hole is provided on the right side of the partition plate 11 for a weight 9 to pass through. A first installation plate 4 is fixedly installed on the left and right sides of the battery 3 in the front-to-back direction, and a second installation plate 12 is fixedly installed on the front and rear sides of the battery 3 in the left-to-right direction.
[0031] The first mounting plate 4 is fixedly connected to the battery compartment 1 at both ends, and the second mounting plate 12 is fixedly connected to the inner sides of the left and right first mounting plates 4 respectively at both ends, with a gap between the second mounting plate 12 and the battery compartment 1.
[0032] like Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, a push-button switch 18 for activating the aerosol fire extinguisher 25 is located at the top right side. Inside the battery compartment 1, there is also a thermoplastic rope 6. One end of the thermoplastic rope 6 is fixed, and the other end is fixedly connected to a weight 9. Specifically, a connecting ring 15 is fixedly installed above the weight 9, and the thermoplastic rope 6 is fixedly connected to the connecting ring 15. The weight 9 is located directly above the push-button switch 18. When the thermoplastic rope 6 melts, the weight 9 will strike the push-button switch 18 to activate the aerosol fire extinguisher 25.
[0033] In this device, to make efficient use of space, the aerosol fire extinguisher 25 is installed on the battery 3. However, this installation method alone would result in poor aerosol coverage. To ensure better coverage of the battery with the sprayed aerosol, an aerosol nozzle 23 is provided on the aerosol fire extinguisher 25. The aerosol fire extinguisher 25 is fixedly connected to and connected to the guide pipe 5 at the position of the aerosol nozzle 23. The guide pipe 5 is fixedly installed on the partition plate 11 by the fixing plate 17. The end of the guide pipe 5 away from the aerosol fire extinguisher 25 passes through the partition plate 11 from the left side and extends upward to the top of the battery 3. The end of the guide pipe 5 away from the aerosol fire extinguisher 25 is provided with a guide nozzle 13, which extends from the left side above the battery 3 towards the right side.
[0034] A limiting post 14 is fixedly installed on the first mounting plate 4 on the left side. The end of the thermoplastic rope 6 away from the weight 9 is fixedly connected to the limiting post 14. The weight 9 is located on the right side of the battery 3. By placing the limiting post 14 on the left side of the battery 3 and the weight 9 on the right side of the battery 3, the thermoplastic rope 6 can span the entire battery 3, thereby enabling the thermoplastic rope 6 to melt and break in the early stage of ignition, improving the response speed of the device.
[0035] To prevent the weight 9 from shifting during descent, a sliding sleeve 10 is fixedly installed on the left side of the partition plate 11. The weight 9 is located inside the sliding sleeve 10 and slides in cooperation with the sliding sleeve 10. The bottom end of the sliding sleeve 10 extends through the through hole to the bottom of the partition plate 11 and is in contact with the aerosol fire extinguisher 25. The push switch 18 is located at the bottom of the sliding sleeve 10.
[0036] A pad 7 is fixedly installed on the first mounting plate 4 on the right side. The hot-melt rope 6 is in contact with the pad 7, and the contact surface between the pad 7 and the hot-melt rope 6 is curved. A limiting groove 8 is provided in the middle of the pad 7, and the hot-melt rope 6 is located in the limiting groove 8. During installation, the hot-melt rope 6 is locked in the limiting groove 8 to prevent it from shaking back and forth. In addition, the curved surface design can also prevent the hot-melt rope 6 from being cut by the corner of the battery 3.
[0037] like Figure 6 , Figure 7As shown, the aerosol fire extinguisher 25 includes a shell 20, and an inner liner 24 is fixedly installed inside the shell 20. The inner liner 24 divides the aerosol fire extinguisher 25 into two areas, left and right. A piezoelectric igniter 19 is fixedly installed in the right area. The pressing head on the top of the piezoelectric igniter 19 abuts against the pressing switch 18. The pressing switch 18 slides with the shell 20. The left area has a first solid extinguishing agent 21 and a second solid extinguishing agent 22 arranged from right to left. The output end of the piezoelectric igniter 19 extends into the left area and connects with the first solid extinguishing agent 21. An aerosol nozzle 23 is provided at the leftmost end of the aerosol fire extinguisher 25.
[0038] The aerosol fire extinguisher 25 is a conventional prior art technology. In this embodiment, since the aerosol fire extinguisher 25 is located inside the battery compartment 1, there is no risk of accidental activation, so a safety ring is not required. The aerosol fire extinguisher 25 is activated when the top of the press switch 18 is pressurized. The press switch 18 moves downward to squeeze the head of the piezoelectric igniter 19. After being squeezed, the head of the piezoelectric igniter 19 generates a current at its output terminal. This current ignites the solid extinguishing agent in the lining of the aerosol fire extinguisher 25, thereby generating a large amount of aerosol and spraying it out from the aerosol nozzle 23.
[0039] The operating principle of this device is as follows: In the early stages of a fire caused by a high temperature malfunction of the electric vehicle battery 3, the thermal fusion rope 6 melts and breaks. After melting, the weight 9 loses its traction and directly strikes the push-button switch 18. Upon being compressed, the push-button switch 18 activates the aerosol fire extinguisher 25 via the piezoelectric igniter 19. The aerosol fire extinguisher 25 ignites, generating a large amount of aerosol. This aerosol is ejected along the guide tube 5 from the guide nozzle 13 on one side above the battery 3, covering the surface of the battery 3. The particles released by the aerosol have high surface activity, capable of adsorbing active free radicals in combustion, interrupting the chain reaction, and thus quickly extinguishing the flame. Simultaneously, the metal oxides in the aerosol neutralize acidic gases produced during combustion, such as hydrogen fluoride and hydrogen cyanide, reducing the generation of toxic gases and lowering the flame energy.
[0040] Aerosol particles also diffuse throughout the battery compartment 1 via Brownian motion, forming a uniform inert gas layer that isolates and reduces oxygen in the space, preventing reignition. The solid particles in the aerosol melt at high temperatures and adhere to the surface of the battery 3 to form a barrier layer, preventing heat from being further transferred to unburned units, thereby achieving self-ignition protection for the electric vehicle.
[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A battery car self-ignition protection device, comprising a battery bin (1) and a top cover (2) fixedly installed on the top of the battery bin (1), and a battery (3) fixedly installed in the battery bin (1), characterized in that, The battery compartment (1) is also fixedly installed with an aerosol fire extinguisher (25), the aerosol fire extinguisher (25) is located below the battery (3), the top of the right side of the aerosol fire extinguisher (25) is provided with a press switch (18) capable of starting the aerosol fire extinguisher (25); the battery compartment (1) is also provided with a hot melt rope (6), one end of the hot melt rope (6) is fixed, the other end is fixedly connected with a heavy block (9), the heavy block (9) is located directly above the press switch (18), when the hot melt rope (6) is fused, the heavy block (9) will hit the press switch (18) to start the aerosol fire extinguisher (25).
2. The battery car self-ignition protection device according to claim 1, characterized in that, The battery (3) and the aerosol fire extinguisher (25) are also fixedly installed with a partition plate (11) for dividing the battery compartment (1) into two spaces, the partition plate (11) is fixedly installed in the middle of the battery compartment (1), the lower surface of the partition plate (11) is fixedly installed with a mounting sleeve (16) for accommodating the aerosol fire extinguisher (25), the right side of the partition plate (11) is provided with a through hole for the heavy block (9) to pass through, the upper surface of the partition plate (11) is fixedly installed with a first mounting plate (4) vertically arranged on the left and right sides of the battery (3) in the front-rear direction, and a second mounting plate (12) vertically arranged on the front and rear sides of the battery (3) in the left-right direction.
3. The battery car self-ignition protection device according to claim 2, characterized in that, The aerosol fire extinguisher (25) is provided with an aerosol nozzle (23), the aerosol fire extinguisher (25) is fixedly connected and communicated with a flow guide pipe (5) at the position of the aerosol nozzle (23), one end of the flow guide pipe (5) away from the aerosol fire extinguisher (25) passes through the partition plate (11) from the left side of the partition plate (11) and extends above the battery (3), the other end of the flow guide pipe (5) away from the aerosol fire extinguisher (25) is provided with a flow guide nozzle (13), the flow guide nozzle (13) is located on the left side above the battery (3) and faces the right side.
4. The battery car self-ignition protection device according to claim 2, characterized in that, The first mounting plate (4) on the left side is fixedly installed with a limiting column (14), one end of the hot melt rope (6) away from the heavy block (9) is fixedly connected with the limiting column (14), and the heavy block (9) is located on the right side of the battery (3).
5. The battery car self-ignition protection device according to claim 4, wherein The left side of the partition plate (11) is fixedly connected with a sliding sleeve (10), the heavy block (9) is located in the sliding sleeve (10) and is in sliding cooperation with the sliding sleeve (10), the bottom end of the sliding sleeve (10) extends to the lower side of the partition plate (11) through the through hole and is attached to the aerosol fire extinguisher (25), and the press switch (18) is located at the bottom of the sliding sleeve (10).
6. The battery car self-ignition protection device according to claim 4, wherein The first mounting plate (4) on the right side is fixedly installed with a pad (7), the hot melt rope (6) is attached to the pad (7), and the contact surface between the pad (7) and the hot melt rope (6) is an arc surface.
7. The battery car self-ignition protection device according to claim 6, characterized by, The middle of the pad (7) is provided with a limiting groove (8), and the hot melt rope (6) is located in the limiting groove (8).
8. The electric vehicle self-ignition protection device of claim 2, wherein, The front and rear ends of the first mounting plate (4) are fixedly connected with the battery compartment (1), the left and right ends of the second mounting plate (12) are respectively fixedly connected with the inner sides of the left and right first mounting plates (4), and a gap is left between the second mounting plate (12) and the battery compartment (1).
9. The battery car self-ignition protection device according to claim 1, wherein The upper side of the heavy block (9) is fixedly installed with a connecting ring (15), and the hot melt rope (6) is fixedly connected with the connecting ring (15).
10. The battery car self-ignition protection device according to claim 1, wherein The aerosol fire extinguisher (25) comprises a shell (20), an inner liner (24) fixedly arranged inside the shell (20), the inner liner (24) separating the aerosol fire extinguisher (25) into two regions, a piezoelectric igniter (19) fixedly arranged in the right region, a pressing head at the top of the piezoelectric igniter (19) abutting against a pressing switch (18), the pressing switch (18) in sliding fit with the shell (20); a first solid fire extinguishing agent (21) and a second solid fire extinguishing agent (22) arranged in the left region from right to left, an output end of the piezoelectric igniter (19) extending into the left region and abutting against the first solid fire extinguishing agent (21), and an aerosol nozzle (23) arranged at the leftmost end of the aerosol fire extinguisher (25).