Battery fire prevention device for electric motorcycle

Abstract

The utility model relates to electric motor car battery technical field especially relates to a kind of electric motor car battery fire prevention device, including fire-prevention open shell;Still including cutting blade, battery body is installed in fire-prevention open shell, hole groove is set in fire-prevention open shell side, battery body side is fixedly connected with the connecting wire passing through hole groove, the connecting wire side is fixedly connected with the terminal connector of the surface set terminal groove, cutting blade is provided in fire-prevention open shell, cutting blade top end is equipped with moving block;The utility model is by being provided with cutting blade in fire-prevention open shell and the moving block that can drive cutting blade to move up and down, when detecting battery temperature anomaly inside electric motor car, cutting blade will be cut to connecting wire by moving downward, connecting wire and the terminal connector used for connecting external charging wire are separated, realize power-off disconnect, simultaneously, the moving block that moves downward will block the hole groove set for the convenience of connecting wire passing through, avoid fire source along charging wire spread.

Description

Technical Field

[0001] This utility model belongs to the field of electric motorcycle battery technology, and specifically relates to an electric motorcycle battery fire prevention device. Background Technology

[0002] Electric motorcycles, with their significantly superior speed performance and long range on a single charge compared to traditional modes of transportation, have become an important mode of transportation choice for modern urban commuters. Their core driving principle is: the on-board energy storage battery pack outputs electrical energy, which drives the built-in electric motor to generate rotational power. Through the transmission system, the electrical energy is efficiently converted into mechanical energy, ultimately enabling the vehicle to move forward smoothly and efficiently, meeting the daily travel needs of users.

[0003] Currently, most electric motorcycles on the market use high-energy-density lithium battery packs as their core power source. The chemical properties of these batteries result in a significant risk of thermal runaway under abnormal conditions such as overcharging, short circuits, or mechanical damage, which can easily lead to combustion or even explosion. Although existing battery protection systems can provide local fire protection for the battery pack itself, during charging, due to electrical circuit overload, interface aging, or insulation damage, flames may spread rapidly along the power supply lines to the external vehicle structure. Once the fire breaks through the battery compartment, the high temperature will quickly ignite the vehicle's plastic trim, tires, and polymer components, causing the entire vehicle to burn. This rapid spread of fire not only causes property damage but also releases highly toxic smoke and high-temperature radiation, posing a direct threat to the lives of people in the vicinity.

[0004] Therefore, in view of the fact that electric motorcycle lithium batteries are prone to thermal runaway and explosion due to their chemical characteristics, and that existing protection is limited to the inside of the battery, but circuit problems during charging can cause flames to overflow and ignite the entire vehicle, releasing toxic and high-temperature fumes that threaten personal safety, a fire prevention device for electric motorcycle batteries equipped with cutting blades can be designed. Utility Model Content

[0005] To overcome the problem that lithium batteries in electric motorcycles are prone to thermal runaway and explosion in case of abnormalities due to their chemical properties, current protection is limited to the inside of the battery. However, problems with the wiring during charging can cause flames to overflow and ignite the entire vehicle.

[0006] The technical solution of this utility model is as follows: a fireproof device for electric motorcycle batteries, including a fireproof open shell; and a cutting blade. A battery body is installed inside the fireproof open shell. A slot is opened on one side of the fireproof open shell. A connecting wire passing through the slot is fixedly connected to the side of the battery body near the slot. A connector with a wiring groove on its surface is fixedly connected to the side of the connecting wire away from the battery body. The connector is located on the outside of the fireproof open shell. A cutting blade is installed inside the fireproof open shell. A movable block is installed at the top of the cutting blade and is movably installed inside the fireproof shell. A lifting component for driving the cutting blade to move downward is installed inside the fireproof shell.

[0007] Preferably, the lifting component drives the moving block and the cutting blade installed below the moving block to move downward to cut the connecting wire. After the cutting is completed, the moving block is moved to block the slot, thereby disconnecting the battery body from the charging cable. At the same time, it prevents external air from entering the electric motorcycle through the wiring hole and contributing to its combustion. The fireproof open shell design allows the heat generated by the battery body to dissipate through the open shell during normal use, preventing the temperature from getting too high.

[0008] Preferably, the lifting assembly includes a limit guide module and a drive module. The limit guide module is used to restrict the movement direction and position of the cutting blade, and the drive module is used to provide power for the movement of the moving block.

[0009] As a preferred embodiment, the limiting and guiding module includes a first limiting plate, a first threaded rod, and a first limiting post; the first limiting plate is fixedly connected inside the fireproof open shell and is located above the moving block; the first threaded rod is rotatably connected inside the first limiting plate; the first limiting post is fixedly connected to the bottom end of the first limiting plate; the moving block has a screw hole that matches the first threaded rod; and the moving block is sleeved on the outside of the first limiting post.

[0010] Preferably, the drive assembly includes a No. 1 motor, which is mounted on the top of the No. 1 limit plate. The output end of the No. 1 motor is fixedly connected to the No. 1 threaded rod, and the No. 1 motor is used to drive the No. 1 threaded rod to rotate.

[0011] Preferably, a top cover is movably connected to the top of the fire-resistant open shell, and a second limiting plate is fixedly connected to the top of the fire-resistant open shell on one side of the top cover.

[0012] Preferably, a No. 2 threaded rod is rotatably connected inside the No. 2 limiting plate, and a No. 2 limiting post is fixedly connected to the side of the No. 2 limiting plate near the top cover. The top cover has a threaded hole that matches the No. 2 threaded rod. The top cover is sleeved on the outside of the No. 2 limiting post, and a limiting ring is fixedly connected to the side of the No. 2 threaded rod near the top cover.

[0013] Preferably, a second motor is installed on the side of the second limiting plate away from the top cover. The output end of the second motor is fixedly connected to the second threaded rod, and the second motor is used to drive the second threaded rod to rotate.

[0014] The beneficial effects of this utility model are:

[0015] By installing a cutting blade and a moving block that can move the cutting blade up and down inside the fireproof open shell, when an abnormal battery temperature is detected inside the electric motorcycle, the cutting blade will move downward to cut the connecting wire, separating the connecting wire from the connector used to connect the external charging wire, thus achieving power disconnection. At the same time, the downward moving block will block the slot designed to facilitate the connection wire to pass through, preventing the fire source from spreading along the charging wire. Attached Figure Description

[0016] Figure 1 The diagram shown is a first three-dimensional structural diagram of the interior of the fire-resistant open shell of this utility model;

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the fire-resistant open shell of this utility model.

[0018] Figure 3 The diagram shown is an isometric three-dimensional structural schematic of the battery body of this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the movable block and cutting blade of this utility model.

[0020] Figure 5 The diagram shown is a second three-dimensional structural diagram of the interior of the fire-resistant open shell of this utility model.

[0021] Explanation of reference numerals in the attached diagram: 1. Flame-retardant open outer shell; 2. Cutting blade; 3. Battery body; 4. Hole / slot; 5. Connecting wire; 6. Connector; 7. Moving block; 811. No. 1 limiting plate; 812. No. 1 threaded rod; 813. No. 1 limiting post; 821. No. 1 motor; 9. Top cover; 10. No. 2 limiting plate; 11. No. 2 threaded rod; 12. No. 2 limiting post; 13. Limiting ring; 14. No. 2 motor. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1-5This utility model provides an embodiment of a fire-resistant device for an electric motorcycle battery, comprising a fire-resistant open-type housing 1 and a cutting blade 2. A battery body 3 is installed inside the fire-resistant open-type housing 1. A slot 4 is formed on one side of the fire-resistant open-type housing 1. A connecting wire 5 passing through the slot 4 is fixedly connected to the side of the battery body 3 near the slot 4. A connector 6 with a wiring groove on its surface is fixedly connected to the side of the connecting wire 5 away from the battery body 3. The connector 6 is located on the outside of the fire-resistant open-type housing 1. The cutting blade 2 is installed inside the fire-resistant open-type housing 1, and a movable part movably disposed within the fire-resistant housing is mounted on the top of the cutting blade 2. Block 7, with a lifting assembly installed inside the fire-resistant outer shell, drives the cutting blade 2 downward. The lifting assembly moves the moving block 7 and the cutting blade 2 installed below it downward to cut the connecting wire 5. After cutting, the moving block 7 is moved to block the slot 4, disconnecting the battery body 3 from the charging cable and preventing external air from entering the electric motorcycle through the wiring hole, thus aiding its combustion. The fire-resistant open outer shell 1 design allows heat generated by the battery body 3 to dissipate through the open opening during normal use, preventing overheating. The lifting assembly includes a limit guide module and... The drive module and the limit guide module are used to limit the movement direction and position of the cutting blade 2. The drive module is used to provide power for the movement of the moving block 7. The limit guide module includes a first limit plate 811, a first threaded rod 812, and a first limit post 813. The first limit plate 811, which is set above the moving block 7, is fixedly connected inside the fireproof open shell 1. The first threaded rod 812 is rotatably connected inside the first limit plate 811. The first limit post 813 is fixedly connected to the bottom end of the first limit plate 811. The moving block 7 has a screw hole that matches the first threaded rod 812. The moving block 7 is sleeved on the first limit plate. Outside the column 813, after the first threaded rod 812 rotates, under the restriction of the first limiting column 813, the moving block 7 screwed to the outside of the first threaded rod 812 cannot rotate with the rotation of the first threaded rod 812, but moves up and down along the first limiting column 813. The drive assembly includes a first motor 821. The first motor 821 is installed on the top of the first limiting plate 811. The output end of the first motor 821 is fixedly connected to the first threaded rod 812. The first motor 821 is used to drive the first threaded rod 812 to rotate. The first battery can provide power for the up and down movement of the moving block 7 and the cutting blade 2.

[0024] Please see Figure 1 and Figure 5In this embodiment, a top cover 9 is movably connected to the top of the fireproof open shell 1. A second limiting plate 10 is fixedly connected to the top of the fireproof open shell 1 on one side of the top cover 9. The top cover 9, together with the second limiting plate 10, can form a shield above the fireproof open shell 1, forming a sealed space to prevent external air from entering and aiding combustion, and also to prevent internal flame leakage. A second threaded rod 11 is rotatably connected inside the second limiting plate 10. A second limiting post 12 is fixedly connected to the side of the second limiting plate 10 near the top cover 9. The top cover 9 has a screw hole that matches the second threaded rod 11. The cover 9 is sleeved on the outside of the second limiting post 12. The second threaded rod 11 is fixedly connected to the side of the top cover 9 near the second cover 9. After the second threaded rod 11 rotates, under the restriction of the second limiting post 12, the top cover 9 screwed to the outside of the second threaded rod 11 cannot rotate with the second threaded rod 11, but moves along the second limiting post 12. The second limiting plate 10 is equipped with the second motor 14 on the side away from the top cover 9. The output end of the second motor 14 is fixedly connected to the second threaded rod 11. The second motor 14 is used to drive the second threaded rod 11 to rotate, and provides power for the movement of the top cover 9 through the second motor 14.

[0025] During installation, when assembling the electric motorcycle, the fireproof open shell 1 is installed inside the electric motorcycle, the battery is installed inside, the connector 6 is fixed to the outer shell of the electric motorcycle through the slot 4, and an NTC temperature sensor is installed inside the fireproof open shell 1.

[0026] During use, the heat generated by the battery during use and charging is dissipated through the open design of the flame-retardant open outer shell 1. In the event of an abnormal state, causing the battery body 3 to start burning, the NTC temperature sensor detects the abnormal data and transmits the data to the control module. The control module then issues a command, starting the first motor 821 and driving the first threaded rod 812 to rotate. Under the restriction of the first limit post 813, the cutting blade 2 moves downward, cutting the connecting wire 5. At the same time, the moving block 7 stops the post slot 4 to prevent the entry of external combustion-supporting gases and internal flames. The leak is detected, and the second motor 14 is started. The second motor 14 drives the threaded rod to rotate. Under the restriction of the second limit post 12, the top cover 9, which is screwed to the outside of the second threaded rod 11, cannot rotate with the second threaded rod 11. Instead, it moves along the second limit post 12 toward the second limit plate 10 until it seals the opening of the fireproof open shell 1. Both the top cover 9 and the fireproof open shell 1 are made of fireproof and heat-insulating materials, which can block the spread of flame and heat. At the same time, after closing, the combustion air cannot enter. After the internal combustible gas and combustion-supporting gas are exhausted, the flame will be extinguished.

[0027] Through the above steps, a cutting blade 2 and a moving block 7 that can move the cutting blade 2 up and down are installed inside the fireproof open shell 1. When an abnormal battery temperature is detected inside the electric motorcycle, the cutting blade 2 will move downward to cut the connecting wire 5, separating the connecting wire 5 from the connector 6 used to connect the external charging cable, thus achieving power disconnection. At the same time, the downward-moving moving block 7 will block the hole 4 set to facilitate the connection wire 5 to pass through, preventing the fire source from spreading along the charging cable. This solves the problem that electric motorcycle lithium batteries are prone to thermal runaway and explosion when abnormal due to their chemical characteristics. Existing protection is limited to inside the battery, but wiring problems during charging can cause flames to overflow and ignite the entire vehicle.

Claims

1. A fire-resistant device for an electric motorcycle battery, comprising a fire-resistant open outer shell (1); characterized in that: It also includes a cutting blade (2), a battery body (3) installed inside a fireproof open shell (1), a slot (4) is provided on one side of the fireproof open shell (1), a connecting wire (5) passing through the slot (4) is fixedly connected to the side of the battery body (3) near the slot (4), a connector (6) with a wiring groove on its surface is fixedly connected to the side of the connecting wire (5) away from the battery body (3), the connector (6) is located on the outside of the fireproof open shell (1), a cutting blade (2) is provided inside the fireproof open shell (1), a movable block (7) is installed at the top of the cutting blade (2) and is movably installed inside the fireproof shell, and a lifting component for driving the cutting blade (2) to move downward is installed inside the fireproof shell.

2. The fire-prevention device for an electric motorcycle battery according to claim 1, characterized in that: The lifting assembly includes a limit guide module and a drive module. The limit guide module is used to limit the direction and position of movement of the cutting blade (2), and the drive module is used to provide power for the movement of the moving block (7).

3. The fire-prevention device for an electric motorcycle battery according to claim 2, characterized in that: The limiting guide module includes a first limiting plate (811), a first threaded rod (812), and a first limiting post (813); the first limiting plate (811) is fixedly connected inside the fireproof open shell (1) and is set above the moving block (7). The first threaded rod (812) is rotatably connected inside the first limiting plate (811). The first limiting post (813) is fixedly connected to the bottom end of the first limiting plate (811). The moving block (7) has a screw hole that matches the first threaded rod (812). The moving block (7) is sleeved on the outside of the first limiting post (813).

4. The fire-prevention device for an electric motorcycle battery according to claim 3, characterized in that: The drive assembly includes a No. 1 motor (821), a No. 1 limit plate (811) with the No. 1 motor (821) mounted on the top, and the output end of the No. 1 motor (821) is fixedly connected to the No. 1 threaded rod (812). The No. 1 motor (821) is used to drive the No. 1 threaded rod (812) to rotate.

5. The fire-prevention device for an electric motorcycle battery according to claim 1, characterized in that: The top of the fireproof open shell (1) is movably connected to a top cover (9), and the top of the fireproof open shell (1) is fixedly connected to a second limiting plate (10) located on one side of the top cover (9).

6. The fire-prevention device for an electric motorcycle battery according to claim 5, characterized in that: The No. 2 limiting plate (10) is rotatably connected to the No. 2 threaded rod (11). The No. 2 limiting plate (10) is fixedly connected to the No. 2 limiting post (12) on the side near the top cover (9). The top cover (9) has a screw hole that matches the No. 2 threaded rod (11). The top cover (9) is sleeved on the outside of the No. 2 limiting post (12). The No. 2 threaded rod (11) is fixedly connected to the side near the top cover (9) with a limiting ring (13).

7. A fire-prevention device for an electric motorcycle battery according to claim 6, characterized in that: The second limit plate (10) is equipped with a second motor (14) on the side away from the top cover (9). The output end of the second motor (14) is fixedly connected to the second threaded rod (11). The second motor (14) is used to drive the second threaded rod (11) to rotate.

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