An explosion-proof protection device for a power battery

Abstract

The present invention relates to the technical field of battery box protection, and discloses an explosion-proof protection device for a power battery, comprising a base, the top of the base being detachably connected to an explosion-proof shell, the top of the base being fixedly connected to a power battery box, and the inner wall of the base being provided with a heat dissipation component. The explosion-proof protection device for the power battery is provided with a heat conducting plate, a mounting groove, a water inlet pipe, a circulating water pipe, a water outlet pipe and a cover plate. When the power battery box is in operation, the heat generated is transferred to the circulating water pipe through the heat conducting plate, and the coolant enters the circulating water pipe from the water inlet pipe. The heat is taken away by the coolant flowing in the circulating water pipe. The heat dissipation fan is operated to blow air to dissipate the heat of the power battery box, accelerate air circulation, and quickly dissipate the heat. The heat dissipation by the coolant circulation and the heat dissipation by the heat dissipation fan avoids the safety problems caused by overheating of the power battery box, thereby improving the service life and safety of the power battery box.

Description

Technical Field

[0001] The present invention relates to the technical field of battery box protection, and in particular to an explosion-proof protection device for a power battery. Background Art

[0002] With the popularization of new energy vehicles such as electric vehicles and hybrid vehicles, the safety issues of power batteries have become increasingly prominent; factors such as battery thermal runaway, short circuit, and excessive internal pressure may cause battery explosions, posing a serious threat to the safety of personnel and equipment.

[0003] The prior art patent document CN214672735U provides a power battery box protection device. The power battery box protection device can achieve early fire perception, intelligent judgment, early intervention and efficient fire extinguishing through a fire suppression device, thereby protecting the personal safety of electric vehicles and passenger drivers to the greatest extent, and opening up a life channel for the evacuation of drivers and customers. The fire suppression device is connected to the power battery box through a delivery pipe, so that its fire extinguishing agent can enter the battery pack, solving the problem that when a fire occurs inside the battery, the waterproof material on its outer surface is sealed and blocks the fire extinguishing agent, thereby meeting the safe operation and management needs of pure new energy vehicles.

[0004] Although the above-mentioned prior art can extinguish a fire when a battery box catches fire, the battery box will generate heat during operation. If the heat is not dissipated, the temperature inside the box will become higher and higher. Excessive temperature can easily cause the batteries inside the battery box to overheat, run away, and explode. The heat of the battery box cannot be dissipated well, and the heat dissipation effect is poor, which cannot meet people's needs. Therefore, we need an explosion-proof protection device for power batteries. Summary of the Invention

[0005] The object of the present invention is to provide an explosion-proof protection device for a power battery, so as to solve the problem of poor heat dissipation effect of the battery box mentioned in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an explosion-proof protection device for a power battery, comprising a base, an explosion-proof housing detachably connected to the top of the base, and a power battery box fixedly connected to the top of the base, a heat dissipation assembly provided on the inner wall of the base, a protective assembly provided on the outer wall of the explosion-proof housing, a limit assembly provided on the inner wall of the explosion-proof housing, a fan assembly provided on the inner wall of the explosion-proof housing, and a fire suppression device installed on the top of the base;

[0007] The heat dissipation assembly includes a heat conducting plate, a mounting groove is provided at the bottom of the base, and a water inlet pipe is provided on the inner wall of the base, a circulating water pipe is provided at one end of the water inlet pipe, and a water outlet pipe is provided at one end of the circulating water pipe, and a cover plate is detachably connected to the bottom of the base;

[0008] The protective assembly includes a heat dissipation slot, a heat dissipation net detachably connected to the outer wall of the explosion-proof housing, and the outer wall of the heat dissipation net is provided with fixing bolts, a positioning hole is opened on the outer wall of the explosion-proof housing, and a protective plate detachably connected to the outer wall of the explosion-proof housing, a positioning column is fixedly connected to the outer wall of the protective plate, and the outer wall of the protective plate is provided with fastening bolts;

[0009] The limit assembly includes a fixed seat, and the inner wall of the fixed seat is provided with a fixed groove, the inner wall of the fixed groove is fixedly connected to a spring, and the inner wall of the fixed groove is slidably connected to a slider, the outer wall of the slider is fixedly connected to a round rod, and one end of the round rod is fixedly connected to the limit strip;

[0010] The fan assembly includes a slot, and the inner wall of the slot is slidably connected to a mounting bracket, the outer wall of the mounting bracket is provided with mounting bolts, and the outer wall of the mounting bracket is provided with a placement slot, the inner wall of the placement slot is detachably connected to the heat dissipation fan, and the outer wall of the mounting bracket is provided with a cross bolt.

[0011] Preferably, the outer wall of the heat conducting plate fits with the wall of the circulating water pipe, and the circulating water pipe is installed in the installation groove.

[0012] Preferably, one end of the water inlet pipe extends into the installation groove to be connected to the circulating water pipe, and one end of the water outlet pipe extends into the installation groove to be connected to the circulating water pipe.

[0013] Preferably, there are multiple heat dissipation slots, and the multiple heat dissipation slots are opened on the explosion-proof housing at equal distances.

[0014] Preferably, the explosion-proof housing forms a fixed structure with the heat dissipation net through fixing bolts, and one end of the fixing bolt is threaded through the heat dissipation net and extends into the explosion-proof housing for connection.

[0015] Preferably, the explosion-proof housing and the protective plate form a fixed structure through fastening bolts, and one end of the fastening bolt is threaded through the positioning column and extends into the explosion-proof housing for connection.

[0016] Preferably, the fixing seat forms an elastic structure with the slider through a spring, and one end of the slider extends into the fixing groove to be connected with the spring.

[0017] Preferably, the shape and size of the inner wall of the limiting strip matches the shape and size of the outer wall of the power battery box, and the inner wall of the limiting strip fits the outer wall of the power battery box.

[0018] Preferably, the explosion-proof housing forms a sliding structure with the mounting frame through a slot, and one end of the mounting frame extends into the slot for connection.

[0019] Preferably, the explosion-proof housing forms a fixed structure with the mounting frame through mounting bolts, and one end of the mounting bolt is threaded through the mounting frame and extends into the explosion-proof housing for connection.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] First, the present invention is provided with a heat conducting plate, a mounting groove, a water inlet pipe, a circulating water pipe, a water outlet pipe and a cover plate. When the power battery box is in operation, the heat generated is transferred to the circulating water pipe through the heat conducting plate, and the coolant enters the circulating water pipe from the water inlet pipe. The coolant flows in the circulating water pipe to take away the heat. The heat dissipation fan works to blow air to dissipate the heat of the power battery box, accelerate the air circulation, and quickly dissipate the heat. The heat dissipation through the circulation of the coolant and the heat dissipation fan avoids the safety problems caused by overheating of the power battery box, improves the service life and safety of the power battery box, and meets people's needs.

[0022] Second, the present invention is provided with a heat dissipation groove, a heat dissipation net, a fixing bolt, a positioning hole, a protective plate, a positioning column and a fastening bolt. The heat dissipation groove and the heat dissipation net facilitate the dissipation of heat in the explosion-proof shell. When the power battery box overheats and explodes, the explosion-proof shell can block the impact force generated by the explosion, which can effectively prevent explosions. The impact force is emitted from the heat dissipation groove, and the protective plate can effectively block the impact force. The structure is simple and easy to use.

[0023] Third, the present invention is provided with a fixing seat, a fixing groove, a spring, a slider, a round rod and a limit bar. The limit bar is designed according to the size of the power battery box. When the explosion-proof shell is installed on the base, the limit bar can press the power battery box well through the elastic force of the spring to limit it, thereby preventing the fixed power battery box from loosening and playing an auxiliary pressing and limiting effect.

[0024] Fourth, the present invention is provided with a slot, a mounting frame, a mounting bolt, a placement slot, a heat dissipation fan and a cross bolt. When the heat dissipation fan needs to be repaired, the heat dissipation fan can be removed from the placement slot by removing the mounting bolt, pulling the mounting frame out of the slot, and removing the cross bolt, thereby providing convenience for the operator to repair the heat dissipation fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the base and explosion-proof housing structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the base and circulating water pipe structure of the present invention;

[0028] Figure 4This is a schematic diagram of the explosion-proof housing and heat dissipation slot structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the power battery box and the limiting bar structure of the present invention;

[0030] Figure 6 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0031] Figure 7 This is a structural diagram of the explosion-proof housing and mounting frame of the present invention.

[0032] 1. Base; 2. Explosion-proof shell; 3. Power battery box; 4. Heat dissipation assembly; 401. Heat conduction plate; 402. Mounting slot; 403. Water inlet pipe; 404. Circulating water pipe; 405. Water outlet pipe; 406. Cover plate; 5. Protection assembly; 501. Heat dissipation slot; 502. Heat dissipation net; 503. Fixing bolt; 504. Positioning hole; 505. Protection plate; 506. Positioning column; 507. Fastening bolt; 6. Limit assembly; 601. Fixing seat; 602. Fixing slot; 603. Spring; 604. Slider; 605. Round rod; 606. Limit strip; 7. Fan assembly; 701. Slot; 702. Mounting frame; 703. Mounting bolt; 704. Placement slot; 705. Heat dissipation fan; 706. Cross bolt; 8. Fire suppression device. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0034] See also Figure 1-7 , the present invention provides a technical solution:

[0035] Example 1

[0036] An explosion-proof protection device for a power battery includes a base 1, an explosion-proof housing 2 being detachably connected to the top of the base 1, a power battery box 3 being fixedly connected to the top of the base 1, a heat dissipation component 4 being provided on the inner wall of the base 1, a protective component 5 being provided on the outer wall of the explosion-proof housing 2, a limit component 6 being provided on the inner wall of the explosion-proof housing 2, a fan component 7 being provided on the inner wall of the explosion-proof housing 2, and a fire suppression device 8 being installed on the top of the base 1;

[0037] The heat dissipation assembly 4 includes a heat conducting plate 401. A mounting groove 402 is provided at the bottom of the base 1. A water inlet pipe 403 is provided on the inner wall of the base 1. A circulating water pipe 404 is provided at one end of the water inlet pipe 403. A water outlet pipe 405 is provided at one end of the circulating water pipe 404. A cover plate 406 is detachably connected to the bottom of the base 1.

[0038] The protective assembly 5 includes a heat dissipation slot 501, a heat dissipation net 502 detachably connected to the outer wall of the explosion-proof housing 2, and a fixing bolt 503 is provided on the outer wall of the heat dissipation net 502. A positioning hole 504 is opened on the outer wall of the explosion-proof housing 2, and a protective plate 505 detachably connected to the outer wall of the explosion-proof housing 2, a positioning column 506 is fixedly connected to the outer wall of the protective plate 505, and a fastening bolt 507 is provided on the outer wall of the protective plate 505;

[0039] The limiting assembly 6 includes a fixing seat 601, and a fixing groove 602 is formed on the inner wall of the fixing seat 601. A spring 603 is fixedly connected to the inner wall of the fixing groove 602, and a slider 604 is slidably connected to the inner wall of the fixing groove 602. A round rod 605 is fixedly connected to the outer wall of the slider 604, and one end of the round rod 605 is fixedly connected to the limiting strip 606;

[0040] The fan assembly 7 includes a slot 701, and the inner wall of the slot 701 is slidably connected to a mounting bracket 702, the outer wall of the mounting bracket 702 is provided with a mounting bolt 703, and the outer wall of the mounting bracket 702 is provided with a placement groove 704, the inner wall of the placement groove 704 is detachably connected to a heat dissipation fan 705, and the outer wall of the mounting bracket 702 is provided with a cross bolt 706.

[0041] Through the above technical solution, when the power battery box 3 is in operation, the heat generated is transferred to the circulating water pipe 404 through the heat conducting plate 401, and the coolant enters the circulating water pipe 404 from the water inlet pipe 403. The coolant flows in the circulating water pipe 404 to take away the heat. The heat dissipation fan 705 works to blow air to dissipate the heat of the power battery box 3, accelerate the air circulation, and quickly dissipate the heat. The heat dissipation through the coolant circulation and the heat dissipation fan 705 avoids the safety problems caused by overheating of the power battery box 3, improves the service life and safety of the power battery box 3, and meets people's needs.

[0042] The heat dissipation slots 501 and the heat dissipation net 502 facilitate the dissipation of heat in the explosion-proof housing 2. When the power battery box 3 overheats and explodes, the explosion-proof housing 2 can block the impact force generated by the explosion, which can effectively prevent explosions. The impact force is generated by the heat dissipation slots 501, and the protective plate 505 can effectively block the impact force. The structure is simple and easy to use.

[0043] The limiting strip 606 is designed according to the size of the power battery box 3. When the explosion-proof housing 2 is installed on the base 1, the limiting strip 606 can well press the power battery box 3 through the elastic force of the spring 603, limiting it and preventing the fixed power battery box 3 from loosening, thereby playing an auxiliary pressing and limiting effect;

[0044] When the heat dissipation fan 705 needs to be repaired, the mounting bolts 703 are removed, the mounting bracket 702 is pulled out from the slot 701, and the cross bolt 706 is removed, so that the heat dissipation fan 705 can be removed from the placement slot 704, providing convenience for the operator to repair the heat dissipation fan 705;

[0045] The base 1 is provided with a fire suppression device 8, as well as a controller, a gas detector, a smoke detector, a temperature detector and a sensor, which are conventional technologies and their functions are not described in detail here.

[0046] Specifically, the outer wall of the heat conducting plate 401 is in contact with the wall of the circulating water pipe 404 , and the circulating water pipe 404 is installed in the installation groove 402 .

[0047] Through the above technical solution, the heat of the power battery box 3 is easily transferred to the heat conducting plate 401, and the heat conducting plate 401 transfers the heat to the circulating water pipe 404 to facilitate heat dissipation.

[0048] Specifically, one end of the water inlet pipe 403 extends into the installation groove 402 and is connected to the circulating water pipe 404 , and one end of the water outlet pipe 405 extends into the installation groove 402 and is connected to the circulating water pipe 404 .

[0049] Through the above technical solution, a circulating water pump is provided at one end of the water inlet pipe 403. The circulating water pump pressurizes the coolant and delivers it to the water inlet pipe 403. The coolant enters the circulating water pipe 404 from the water inlet pipe 403 and is discharged from the water outlet pipe 405 to the heat exchanger. The fan dissipates heat from the heat exchanger. The water will cool down after passing through the heat exchanger. The cooled cooling water enters the water tank. The circulating water pump draws water from the water tank and the cycle repeats.

[0050] Specifically, there are multiple heat dissipation slots 501 , and the multiple heat dissipation slots 501 are opened on the explosion-proof housing 2 at equal distances.

[0051] Through the above technical solution, by opening multiple heat dissipation grooves 501 on the four sides of the explosion-proof shell 2, the heat in the explosion-proof shell 2 is easily dissipated. The heat passes through the heat dissipation grooves 501 and the heat dissipation net 502 and dissipates from the surrounding areas of the protective plate 505.

[0052] Specifically, the explosion-proof housing 2 forms a fixed structure with the heat dissipation net 502 through the fixing bolt 503, and one end of the fixing bolt 503 is threaded through the heat dissipation net 502 and extends into the explosion-proof housing 2 for connection.

[0053] Through the above technical solution, the connection effect between the explosion-proof housing 2 and the fixing bolts 503 and the heat dissipation net 502 is enhanced. The number of fixing bolts 503 is multiple, which can well fix the heat dissipation net 502 on the explosion-proof housing 2.

[0054] Specifically, the explosion-proof housing 2 and the protective plate 505 form a fixed structure through the fastening bolts 507, and one end of the fastening bolts 507 is threaded through the positioning column 506 and extends into the explosion-proof housing 2 for connection.

[0055] Through the above technical solution, the positioning column 506 on the protective plate 505 is inserted into the positioning hole 504 on the explosion-proof shell 2, so that the protective plate 505 can be quickly positioned and assembled, which speeds up the installation efficiency. The positioning hole 504 and the positioning column 506 are both provided with threaded holes that match the fastening bolts 507. There are multiple fastening bolts 507, which can well fix the protective plate 505 on the explosion-proof shell 2.

[0056] Specifically, the fixing seat 601 forms an elastic structure through the spring 603 and the slider 604 , and one end of the slider 604 extends into the fixing groove 602 to be connected with the spring 603 .

[0057] Through the above technical solution, the connection effect between the fixing seat 601 and the spring 603 and the slider 604 is strengthened, and the outer wall of the slider 604 fits with the inner wall of the fixing groove 602, making it easier for the slider 604 to slide in the fixing groove 602.

[0058] Specifically, the shape and size of the inner wall of the limiting strip 606 match the shape and size of the outer wall of the power battery box 3 , and the inner wall of the limiting strip 606 fits the outer wall of the power battery box 3 .

[0059] Through the above technical solution, the connection effect between the limiting strip 606 and the power battery box 3 is enhanced. The limiting strip 606 is designed according to the size of the power battery box 3 and can fit the power battery box 3 well.

[0060] Specifically, the explosion-proof housing 2 forms a sliding structure with the mounting bracket 702 through the slot 701 , and one end of the mounting bracket 702 extends into the slot 701 for connection.

[0061] Through the above technical solution, the connection effect between the explosion-proof housing 2 and the slot 701 and the mounting bracket 702 is enhanced, which facilitates the insertion of the mounting bracket 702 into the slot 701 and facilitates people to insert and install the mounting bracket 702 or pull out and remove the mounting bracket 702.

[0062] Specifically, the explosion-proof housing 2 forms a fixed structure with the mounting bracket 702 through the mounting bolt 703 , and one end of the mounting bolt 703 is threaded through the mounting bracket 702 and extends into the explosion-proof housing 2 for connection.

[0063] Through the above technical solution, the connection effect between the explosion-proof housing 2 and the mounting bolts 703 and the mounting bracket 702 is enhanced. The number of mounting bolts 703 is multiple, which can well fix the mounting bracket 702 on the explosion-proof housing 2, making it easy to install and disassemble.

[0064] During use, first, when the power battery box 3 is running, the heat generated is transferred to the circulating water pipe 404 through the heat conducting plate 401, and the coolant enters the circulating water pipe 404 from the water inlet pipe 403 and exits from the water outlet pipe 405. The coolant flows in the circulating water pipe 404, and takes away the heat transferred from the heat conducting plate 401 to the wall of the circulating water pipe 404. The heat dissipation fan 705 works to blow air, and the wind takes away the heat from the power battery box 3 and dissipates it from the heat dissipation groove 501 and the heat dissipation net 502. The coolant circulates in the circulating water pipe 404 and the heat dissipation is dissipated by the heat dissipation fan 705, thereby avoiding the safety problem caused by overheating of the power battery box 3, improving the service life and safety of the power battery box 3, and meeting people's needs.

[0065] When the power battery box 3 overheats and explodes, the explosion-proof housing 2 can block the impact force generated by the explosion, which can effectively prevent explosions. The impact force is emitted from the heat dissipation slot 501, and the heat dissipation net 502 can block the impact force once. The remaining impact force passes through the mesh of the heat dissipation net 502 and hits the protective plate 505. The protective plate 505 can effectively block the impact force and prevent the impact force from directly impacting the outside world. The structure is simple and easy to use.

[0066] The limiting strip 606 is designed according to the size of the power battery box 3. When the power battery box 3 is fixed on the heat conducting plate 401 and the explosion-proof housing 2 is assembled on the base 1, the limiting strip 606 contacts the power battery box 3. The downward pressure of the explosion-proof housing 2 causes the fixing seat 601 to move downward. The downward movement of the fixing seat 601 causes the spring 603 to contract, and the explosion-proof housing 2 is fixed to the base 1 by bolts. The spring 603 rebounds after contraction, and the elastic force is transmitted to the limiting strip 606. The limiting strip 606 can well press the power battery box 3 through the elastic force of the spring 603, limit it, and prevent the fixed power battery box 3 from loosening, thereby playing an auxiliary pressing and limiting effect, thereby strengthening the fixing effect of the power battery box 3.

[0067] When the heat dissipation fan 705 is damaged and needs to be repaired, the mounting bracket 702 is pulled out of the slot 701 by removing the mounting bolts 703, and the mounting bracket 702 drives the heat dissipation fan 705 to the outside. The operator reaches into the explosion-proof housing 2 through the slot 701, unplugs the power cord of the heat dissipation fan 705 from the controller, and removes the cross bolt 706, so that the heat dissipation fan 705 can be removed from the placement slot 704, which provides convenience for the operator to repair the heat dissipation fan 705. During installation, the heat dissipation fan 705 is fixed in the placement slot 704 of the mounting bracket 702 by the cross bolt 706, the power cord of the heat dissipation fan 705 is plugged into the controller, the mounting bracket 702 is inserted into the slot 701 for installation, and the mounting bracket 702 is fixed to the explosion-proof housing 2 by the mounting bolts 703 to complete the installation. This completes all work. The content not described in detail in this manual belongs to the existing technology known to professional and technical personnel in this field.

[0068] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof protection device for a power battery, comprising a base (1), characterized in that: The top of the base (1) is detachably connected to an explosion-proof housing (2), and the top of the base (1) is fixedly connected to a power battery box (3), the inner wall of the base (1) is provided with a heat dissipation component (4), the outer wall of the explosion-proof housing (2) is provided with a protection component (5), and the inner wall of the explosion-proof housing (2) is provided with a limit component (6), the inner wall of the explosion-proof housing (2) is provided with a fan component (7), and the top of the base (1) is installed with a fire suppression device (8); The heat dissipation assembly (4) includes a heat conducting plate (401), a mounting groove (402) is provided at the bottom of the base (1), and a water inlet pipe (403) is provided on the inner wall of the base (1), a circulating water pipe (404) is provided at one end of the water inlet pipe (403), and a water outlet pipe (405) is provided at one end of the circulating water pipe (404), and a cover plate (406) is detachably connected to the bottom of the base (1), an outer wall of the heat conducting plate (401) is in contact with the wall of the circulating water pipe (404), and the circulating water pipe (404) is installed in the mounting groove (402); The protective assembly (5) includes a heat dissipation slot (501), the outer wall of the explosion-proof housing (2) is detachably connected to a heat dissipation net (502), and the outer wall of the heat dissipation net (502) is provided with a fixing bolt (503), the outer wall of the explosion-proof housing (2) is provided with a positioning hole (504), and the outer wall of the explosion-proof housing (2) is detachably connected to a protective plate (505), the outer wall of the protective plate (505) is fixedly connected to a positioning column (506), and the outer wall of the protective plate (505) is provided with a fastening bolt (507); The limiting assembly (6) includes a fixing seat (601), and the inner wall of the fixing seat (601) is provided with a fixing groove (602), the inner wall of the fixing groove (602) is fixedly connected to a spring (603), and the inner wall of the fixing groove (602) is slidably connected to a slider (604), the outer wall of the slider (604) is fixedly connected to a round rod (605), and one end of the round rod (605) is fixedly connected to a limiting strip (606); The fan assembly (7) includes a slot (701), and the inner wall of the slot (701) is slidably connected to a mounting frame (702), the outer wall of the mounting frame (702) is provided with a mounting bolt (703), and the outer wall of the mounting frame (702) is provided with a placement slot (704), the inner wall of the placement slot (704) is detachably connected to a heat dissipation fan (705), and the outer wall of the mounting frame (702) is provided with a cross bolt (706).

2. The explosion-proof protection device for a power battery according to claim 1, characterized in that: One end of the water inlet pipe (403) extends into the installation groove (402) and is connected to the circulating water pipe (404), and one end of the water outlet pipe (405) extends into the installation groove (402) and is connected to the circulating water pipe (404).

3. The explosion-proof protection device for a power battery according to claim 1, characterized in that: There are multiple heat dissipation slots (501), and the multiple heat dissipation slots (501) are arranged at equal distances on the explosion-proof housing (2).

4. The explosion-proof protection device for a power battery according to claim 1, characterized in that: The explosion-proof housing (2) forms a fixed structure with the heat dissipation net (502) through a fixing bolt (503), and one end of the fixing bolt (503) is threaded through the heat dissipation net (502) and extends into the explosion-proof housing (2) for connection.

5. The explosion-proof protection device for a power battery according to claim 1, characterized in that: The explosion-proof housing (2) forms a fixed structure with the protective plate (505) through a fastening bolt (507), and one end of the fastening bolt (507) is threaded through the positioning column (506) and extends into the explosion-proof housing (2) for connection.

6. The explosion-proof protection device for a power battery according to claim 1, characterized in that: The fixing seat (601) forms an elastic structure with the spring (603) and the slider (604), and one end of the slider (604) extends into the fixing groove (602) and is connected to the spring (603).

7. The explosion-proof protection device for a power battery according to claim 1, characterized in that: The shape and size of the inner wall of the limiting strip (606) match the shape and size of the outer wall of the power battery box (3), and the inner wall of the limiting strip (606) fits the outer wall of the power battery box (3).

8. The explosion-proof protection device for a power battery according to claim 1, characterized in that: The explosion-proof housing (2) forms a sliding structure with the mounting frame (702) through the slot (701), and one end of the mounting frame (702) extends into the slot (701) for connection.

9. The explosion-proof protection device for a power battery according to claim 1, characterized in that: The explosion-proof housing (2) forms a fixed structure with the mounting frame (702) through the mounting bolt (703), and one end of the mounting bolt (703) is threaded through the mounting frame (702) and extends into the explosion-proof housing (2) for connection.

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