Explosion-proof ventilation valve and battery box

Abstract

The invention discloses an anti-explosion ventilation valve and a battery box, and relates to the technical field of new energy power batteries, the anti-explosion ventilation valve is applied to the battery box, a sensor is arranged in the battery box, the sensor is used for detecting the air pressure in the battery box, the anti-explosion ventilation valve comprises a valve body, a sealing assembly and a draught fan, a containing groove is formed in the valve body, and a through hole is formed in the bottom wall of the containing groove; the sealing assembly comprises a sealing valve and a movable rod, the movable rod movably penetrates through the bottom wall of the containing groove and is connected with the sealing valve, the movable rod is elastically connected with the bottom wall of the containing groove, and the sealing valve can open or close the through hole; the draught fan is connected with the end, away from the sealing assembly, of the valve body, and the sensor is electrically connected with the draught fan. The technical scheme provided by the invention aims to improve the gas release efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy power batteries, and in particular to an explosion-proof vent valve and a battery box. Background Art

[0002] The explosion-proof vent valve in the battery box is to ensure that when gas release or pressure changes occur in the battery box, these gases can be handled safely, while preventing dangerous substances in the external environment from entering the battery box.

[0003] In the related art, there is usually a spring inside the vent valve, and its preset spring pressure value corresponds to the opening pressure of the valve. When the internal pressure of the battery box exceeds this set value, the spring is compressed, pushing the valve open to release the gas. As the gas pressure decreases, the compressed state of the spring gradually returns to the uncompressed state. When the internal gas pressure approaches or drops to the closing pressure value set for the valve, the restoring force of the spring will gradually close the valve.

[0004] During the gas release process, since the gas release rate is directly related to the difference in internal pressure, when the pressure decreases, the valve opening may decrease, resulting in a slower release rate and thus lower gas release efficiency. Summary of the invention

[0005] The main purpose of the present invention is to provide an explosion-proof vent valve and a battery box, aiming to improve the gas release efficiency.

[0006] To achieve the above object, the explosion-proof vent valve proposed in the present invention is applied to a battery box, wherein a sensor is provided in the battery box, and the sensor is used to detect the air pressure in the battery box. The explosion-proof vent valve comprises:

[0007] A valve body, wherein the valve body is provided with a receiving groove, and a through hole is provided on the bottom wall of the receiving groove;

[0008] A sealing assembly, the sealing assembly comprising a sealing valve and a movable rod, the movable rod movably penetrates the bottom wall of the containing groove and is connected to the sealing valve, the movable rod is elastically connected to the bottom wall of the containing groove, and the sealing valve can open or close the through hole; and

[0009] A fan is connected to an end of the valve body away from the sealing assembly, and the sensor is electrically connected to the fan.

[0010] In one embodiment, the sealing assembly includes an elastic member, the movable rod has a stop portion at one end away from the sealing valve, and the elastic member is sleeved on the movable rod and located between the bottom wall of the receiving groove and the stop portion.

[0011] In one embodiment, a limiting groove is provided on the bottom wall of the containing groove, the movable rod is movably arranged through the bottom wall of the limiting groove and connected to the sealing valve, and a partial structure of the elastic member is contained and limited in the limiting groove.

[0012] In one embodiment, the fan includes fan blades and a drive motor, the drive motor is arranged on the bottom wall of the container, the fan blades are connected to one end of the valve body away from the sealing assembly, and the output shaft of the drive motor is connected to the fan blades; the explosion-proof air valve includes an electromagnetic rod, the electromagnetic rod is arranged on the bottom wall of the container near the drive motor, and the electromagnetic rod is electrically connected to the sensor and the drive motor respectively.

[0013] In one embodiment, the valve body includes a protective cover and a mounting seat, the protective cover is provided with a guide channel, the mounting seat is connected to one side of the protective cover and encloses the receiving groove, the mounting seat is provided with the through hole, the movable rod is movably inserted through the mounting seat and connected to the sealing valve; the mounting seat is provided with a first limiting step on the side facing away from the protective cover, and a partial structure of the sealing valve abuts against the first limiting step for limiting.

[0014] In one embodiment, the explosion-proof air valve includes a breathable structure, and the breathable structure includes a mounting frame and a breathable membrane. The mounting frame is located between the mounting base and the sealing valve. The mounting frame is provided with an air hole, and the air hole is connected to the guide channel. The sealing valve is provided with a mounting hole corresponding to the air hole. The inner peripheral wall of the air hole is formed with a second limiting step, and the air permeable membrane is connected to the second limiting step.

[0015] In one embodiment, the ventilation structure includes a pressure cover, and a plurality of first clamping parts are formed at intervals on a side of the pressure cover facing the mounting frame, and a plurality of second clamping parts are formed at intervals on the inner peripheral wall of the ventilation hole, and each of the first clamping parts is clamped with one of the second clamping parts; a first ventilation groove is provided between any two adjacent first clamping parts, and a second ventilation groove is formed between any two adjacent second clamping parts, and each of the first ventilation grooves corresponds to one of the second ventilation grooves, and the pressure cover is gap-matched with the inner peripheral wall of the mounting hole.

[0016] In one embodiment, the protective cover is provided with a wire passing hole; and / or

[0017] The explosion-proof air valve includes a sealing ring, the area of ​​a side wall of the mounting seat facing the protective cover is larger than the cross-sectional area of ​​the protective cover, a side wall of the mounting seat facing the protective cover is provided with a mounting ring groove surrounding the protective cover, and the sealing ring is arranged in the mounting ring groove.

[0018] In one embodiment, the explosion-proof air valve also includes two fasteners, and two connecting columns are formed at intervals on the side of the mounting seat facing the protective cover, and the two connecting columns are passed through the protective cover and the fan. Each of the fasteners is connected to one of the connecting columns, and a partial structure of the fastener abuts against a partial structure of the fan to limit the position.

[0019] The present invention further provides a battery box, which includes the explosion-proof vent valve described in any one of the above embodiments.

[0020] In the technical solution of the present invention, when the sensor detects that the air pressure in the battery box is higher than a preset value, the sensor will transmit a signal to the fan, and the fan rotates to generate an airflow to push the movable rod to move away from the fan, thereby driving the sealing valve to move to open the through hole, so that the gas in the battery box is transmitted to the outside of the battery box through the container groove and the through hole, thereby realizing the release of the gas in the battery box; when the sensor detects that the air pressure in the battery box returns to the set value of the normal atmospheric pressure, the sensor will transmit a signal to the fan, the fan stops rotating, and the movable rod moves in the direction close to the fan under the action of the elastic restoring force, thereby driving the sealing valve to move to close the through hole; when the gas pressure in the battery box is too large but does not reach the preset value, the pressure of the gas can also push the movable rod to move away from the fan, driving the sealing valve to open the through hole, so that the gas in the battery box is transmitted to the outside of the battery box through the container groove and the through hole, thereby realizing the release of the gas in the battery box; the fan is set to quickly and effectively open the sealing valve to realize the release of the gas in the battery box, so that the air pressure inside and outside the battery box can quickly reach a balance, thereby improving the gas release efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of an embodiment of an explosion-proof vent valve is provided for the present invention;

[0023] Figure 2 A cross-sectional view of an embodiment of an explosion-proof vent valve is provided for the present invention;

[0024] Figure 3 A schematic diagram of the explosion structure of an explosion-proof vent valve according to the present invention from a first perspective;

[0025] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0026] Figure 5 A schematic diagram of the explosion structure of an explosion-proof vent valve according to a second perspective is provided for the present invention.

[0027] Description of Figure Numbers:

[0028] 1000, explosion-proof breathable valve; 1, valve body; 11, containing groove; 12, through hole; 13, limiting groove; 14, protective cover; 141, guide channel; 142, wire hole; 15, mounting seat; 151, first limiting step; 152, mounting ring groove; 153, connecting column; 2, sealing assembly; 21, sealing valve; 211, mounting hole; 22, movable rod; 221, stop part; 23, elastic member; 3, fan; 31, fan blade; 32, driving motor; 4, electromagnetic rod; 5, sealing ring; 6, breathable structure; 61, mounting frame; 611, breathable hole; 611a, second limiting step; 611b, second clamping part; 611c, second breathable groove; 62, breathable membrane; 63, pressure cover; 631, first clamping part; 632, first breathable groove; 7, fastener.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] 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 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 creative work are within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention provides an explosion-proof vent valve 1000 .

[0034] See also Figures 1 to 5 In one embodiment of the present invention, the explosion-proof ventilation valve 1000 is applied to a battery box, a sensor is provided in the battery box, the sensor is used to detect the air pressure in the battery box, the explosion-proof ventilation valve 1000 includes a valve body 1, a sealing component 2 and a fan 3, the valve body 1 is provided with a receiving groove 11, and the bottom wall of the receiving groove 11 is provided with a through hole 12; the sealing component 2 includes a sealing valve 21 and a movable rod 22, the movable rod 22 is movably provided in the bottom wall of the receiving groove 11 and connected with the sealing valve 21, the movable rod 22 is elastically connected to the bottom wall of the receiving groove 11, and the sealing valve 21 can open or close the through hole 12; the fan 3 is connected to the end of the valve body 1 away from the sealing component 2, and the sensor is electrically connected to the fan 3.

[0035] In the technical solution of the present invention, when the sensor detects that the air pressure in the battery box is higher than the preset value, the sensor will transmit a signal to the fan 3, and the fan 3 will rotate to generate an airflow to push the movable rod 22 to move away from the fan 3, thereby driving the sealing valve 21 to move to open the through hole 12, so that the gas in the battery box can pass through the groove 11 and the through hole 12 to the outside of the battery box, thereby releasing the gas in the battery box; when the sensor detects that the air pressure in the battery box returns to the set value of the normal atmospheric pressure, the sensor will transmit a signal to the fan 3, and the fan 3 will stop rotating. The movable rod 22 will stop rotating under the action of the elastic restoring force. The movable rod 22 moves in the direction close to the fan 3 to drive the sealing valve 21 to move and close the through hole 12; when the gas pressure in the battery box is too high but does not reach the preset value, the gas pressure can also push the movable rod 22 to move away from the fan 3, drive the sealing valve 21 to open the through hole 12, so that the gas in the battery box is transmitted to the outside of the battery box through the container 11 and the through hole 12, thereby releasing the gas in the battery box; the fan 3 is set to quickly and effectively open the sealing valve 21 to release the gas in the battery box, so that the air pressure inside and outside the battery box can be quickly balanced, thereby improving the gas release efficiency.

[0036] More specifically, see Figure 2 , Figure 3 as well as Figure 5 In one embodiment of the present invention, the sealing assembly 2 includes an elastic member 23, and the end of the movable rod 22 away from the sealing valve 21 has a stop portion 221, and the elastic member 23 is sleeved on the movable rod 22 and located between the bottom wall of the container 11 and the stop portion 221. When the air pressure in the battery box is higher than the preset value, the fan 3 is started to push the movable rod 22 to move away from the fan 3, thereby driving the sealing valve 21 to move to open the through hole 12, and at this time, the stop portion 221 moves away from the fan 3 and drives the elastic member 23 to compress; when the air pressure in the battery box returns to the set value of the normal atmospheric pressure, the fan 3 stops rotating, the elastic member 23 rebounds and abuts against the stop portion 221, and under the action of the elastic restoring force of the elastic member 23, the movable rod 22 moves toward the fan 3 to drive the sealing valve 21 to move to close the through hole 12; the elastic member 23 can be a spring or an elastic silicone sleeve, and the present invention does not limit this.

[0037] See also Figure 2 , Figure 3 as well as Figure 5In one embodiment of the present invention, a limiting groove 13 is provided on the bottom wall of the containing groove 11, a movable rod 22 is movably arranged on the bottom wall of the limiting groove 13 and connected to the sealing valve 21, and a part of the structure of the elastic member 23 is contained and limited in the limiting groove 13. The limiting groove 13 effectively limits the moving range of the movable rod 22, ensuring that the movable rod 22 can only move within a predetermined stroke, preventing equipment damage or malfunction that may be caused by excessive movement; the moving trajectory of the movable rod 22 in the limiting groove 13 is fixed, which can improve the stability of the entire device, make the operation of the sealing valve 21 more reliable, and avoid unnecessary deviation; the elastic member 23 serves as a buffer element, and its partial structure is accommodated in the limiting groove 13, which can prevent the elastic member 23 from deviating when it is compressed or uncompressed. Combining the elastic member 23 with the limiting groove 13 can make the overall design more compact and help save space; in another embodiment, two movable rods 22, elastic members 23 and limiting grooves 13 are each provided, and the two movable rods 22 drive the sealing valve 21 to move away from the direction of the fan 3, which can provide more balanced operation and stability. This design can reduce the tilt or uneven force application of the sealing valve 21 during movement, thereby ensuring smooth movement and more precise control of the sealing valve 21.

[0038] More specifically, see Figure 2 , Figure 3 as well as Figure 5 In one embodiment of the present invention, the fan 3 includes a fan blade 31 and a drive motor 32, the drive motor 32 is arranged on the bottom wall of the container 11, the fan blade 31 is connected to the end of the valve body 1 away from the sealing assembly 2, and the output shaft of the drive motor 32 is connected to the fan blade 31; the explosion-proof air valve 1000 includes an electromagnetic rod 4, the electromagnetic rod 4 is arranged on the bottom wall of the container 11 close to the drive motor 32, and the electromagnetic rod 4 is electrically connected to the sensor and the drive motor 32 respectively. When the sensor detects that the air pressure in the battery box is higher than the preset value, the sensor will transmit a signal to the electromagnetic rod 4, and the coil of the electromagnetic rod 4 will be energized to generate a magnetic field. The magnetic field interacts with the rotor in the drive motor 32 to generate a rotational torque, and the rotor starts to rotate, driving the output shaft connected to it. The output shaft drives the fan blades 31 to rotate to generate airflow, which pushes the sealing valve 21 to open, thereby realizing the release of gas in the battery box; by controlling the current of the coil of the electromagnetic rod 4, the speed and direction of the drive motor 32 can be controlled, thereby controlling the rotation or stop of the fan blades 31. This setting combines the electromagnetic principle and mechanical transmission. Through the cooperation of the drive motor 32 and the fan blades 31, the effective release and control of the gas inside the battery box are realized.

[0039] For further information, see Figure 2 , Figure 3 as well as Figure 5In one embodiment of the present invention, the valve body 1 includes a protective cover 14 and a mounting seat 15. The protective cover 14 is provided with a guide channel 141. The mounting seat 15 is connected to one side of the protective cover 14 and encloses a receiving groove 11. The mounting seat 15 is provided with a through hole 12. The movable rod 22 is movably penetrated through the mounting seat 15 and connected to the sealing valve 21; the mounting seat 15 is provided with a first limiting step 151 on the side facing away from the protective cover 14, and a part of the structure of the sealing valve 21 abuts against the first limiting step 151 to limit the position. The protective cover 14 guides the gas flow through the guide channel 141, the mounting seat 15 is connected to the protective cover 14 to form a container 11, the through hole 12 is used for the gas in and out of the battery box, and the sealing valve 21 is controlled to open and close by moving the movable rod 22. Part of the structure of the sealing valve 21 abuts against the first limiting step 151, limiting its range of movement on the mounting seat 15, ensuring that the valve body 1 can work stably when releasing gas, and providing an exact range of valve movement and position control through the first limiting step 151.

[0040] To ensure that the air pressure inside and outside the battery box can be balanced, please refer to Figure 1 , Figure 3 as well as Figure 5 In one embodiment of the present invention, the explosion-proof air valve 1000 includes a breathable structure 6, the breathable structure 6 includes a mounting frame 61 and a breathable membrane 62, the mounting frame 61 is located between the mounting base and the sealing valve 21, the mounting frame 61 is provided with a breathable hole 611, the breathable hole 611 is communicated with the guide channel 141, the sealing valve 21 is provided with a mounting hole 211 at a position corresponding to the breathable hole 611, the inner peripheral wall of the breathable hole 611 is formed with a second limiting step 611a, and the breathable membrane 62 is connected to the second limiting step 611a. The breathable membrane 62 allows gas to be freely discharged from the inside of the battery box when necessary, so as to ensure the fluidity and balance of the gas in the battery box while maintaining appropriate atmospheric pressure conditions; the battery will produce gas when working, such as hydrogen or other volatile gases, and the breathable membrane 62 allows these gases to be released from the inside of the battery box to the outside to maintain the balance of internal and external air pressure; if the gas inside the battery box cannot be released, it may cause internal pressure accumulation, thereby increasing the risks and safety issues of the battery box, and the breathable membrane 62 can effectively avoid this situation; through the breathable membrane 62, the gas inside the battery box can be discharged stably, thereby protecting the battery and its surrounding equipment from possible damage caused by internal gas pressure; the breathable membrane 62 is fixed in the breathable hole 611 by the second limiting step 611a, so that the gas can flow through the breathable part of the membrane, and the breathable hole 611 of the mounting frame 61 cooperates with the mounting hole 211 of the sealing valve 21 to ensure the correct position and function of the breathable membrane 62.

[0041] For further information, see Figures 3 to 5In one embodiment of the present invention, the vent structure 6 includes a gland 63, and a plurality of first clamping parts 631 are formed at intervals on the side of the gland 63 facing the mounting frame 61, and a plurality of second clamping parts 611b are formed at intervals on the inner peripheral wall of the vent hole 611, and each first clamping part 631 is clamped with a second clamping part 611b; a first vent groove 632 is formed between any two adjacent first clamping parts 631, and a second vent groove 611c is formed between any two adjacent second clamping parts 611b, and each first vent groove 632 is arranged corresponding to a second vent groove 611c, and the gland 63 is gap-matched with the inner peripheral wall of the mounting hole 211. Located between adjacent first clamping parts 631, a channel is provided for gas circulation. The second air permeable groove 611c is located between the adjacent second clamping parts 611b, corresponding to the first air permeable groove 632, forming a complete gas flow path, and the gap between the pressure cap 63 and the inner wall of the mounting hole 211 also allows gas to flow out. The gas in the battery box is transmitted to the outside of the battery box through the first air permeable groove 632, the second air permeable groove 611c and the gap between the pressure cap 63 and the inner wall of the mounting hole 211, thereby ensuring the fluidity and balance of the gas in the battery box while maintaining appropriate atmospheric pressure conditions; the setting of the pressure cap 63 helps to protect the air permeable membrane 62 from damage, thereby maintaining its normal function; in another embodiment, the pressure cap 63, the air permeable membrane 62, the air hole 611 and the mounting hole 211 are all set to two to ensure that the gas inside and outside the battery box can quickly reach equilibrium.

[0042] To improve the sealing performance of the explosion-proof vent valve 1000 when connected to the battery box, please refer to Figure 3 and Figure 5 In one embodiment of the present invention, the protective cover 14 is provided with a wire hole 142; the explosion-proof air valve 1000 includes a sealing ring 5, and the area of ​​a side wall of the mounting seat 15 facing the protective cover 14 is larger than the cross-sectional area of ​​the protective cover 14, and a side wall of the mounting seat 15 facing the protective cover 14 is provided with a mounting ring groove 152 surrounding the protective cover 14, and the sealing ring 5 is arranged in the mounting ring groove 152. The provision of the wire hole 142 can indeed allow cables or wire harnesses to pass through various components or sensors inside the connection device. Power lines, data lines or control lines can be safely introduced through the wire hole 142 to connect the internal electronic components or devices, which helps to maintain the sealing and safety of the equipment, while providing the necessary connection channels so that the equipment can be effectively operated and maintained; when the explosion-proof ventilation valve 1000 is connected to the battery box, the side wall of the mounting seat 15 facing the protective cover 14 contacts the inner wall of the battery box, and the battery box and the mounting seat 15 are connected by fastening screws. At this time, the sealing ring 5 abuts against the inner wall of the battery box to prevent the gas in the battery box from being transmitted through the gap between the mounting seat 15 and the inner wall of the battery box, ensuring that the gas can only be released through the explosion-proof ventilation valve 1000 and will not leak out through other paths, thereby improving the sealing performance of the connection between the mounting seat 15 and the battery box.

[0043] See also Figure 3 and Figure 5 In one embodiment of the present invention, the explosion-proof vent valve 1000 further includes two fasteners 7. Two connecting columns 153 are formed at intervals on one side of the mounting seat 15 facing the protective cover 14. The two connecting columns 153 are arranged through the protective cover 14 and the fan 3. Each fastener 7 is connected to a connecting column 153. Part of the structure of the fastener 7 is abutted against part of the structure of the fan 3 to limit the position. The fastener 7 is connected to the connecting column 153. The design of the fastener 7 ensures the firm connection between the protective cover 14, the mounting seat 15 and the fan 3, and also facilitates the disassembly and installation of the protective cover 14, the mounting seat 15 and the fan 3 for subsequent maintenance and replacement. The fastener 7 can be a fastening bolt or a fastening screw, which is not limited by the present invention. In another embodiment, two or four connecting columns 153 and the fastener 7 can also be provided. Multiple connecting columns 153 and the fastener 7 can provide a more reliable connection for the protective cover 14, the mounting seat 15 and the fan 3.

[0044] The present invention also proposes a battery box, which includes an explosion-proof ventilation valve 1000. The specific structure of the explosion-proof ventilation valve 1000 refers to the above-mentioned embodiment. Since the battery box adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0045] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An explosion-proof vent valve, applied to a battery box, wherein a sensor is provided in the battery box, and the sensor is used to detect the air pressure in the battery box, characterized in that: The explosion-proof vent valve comprises: A valve body, wherein the valve body is provided with a receiving groove, and a through hole is provided on the bottom wall of the receiving groove; A sealing assembly, the sealing assembly comprising a sealing valve and a movable rod, the movable rod movably penetrates the bottom wall of the containing groove and is connected to the sealing valve, the movable rod is elastically connected to the bottom wall of the containing groove, and the sealing valve can open or close the through hole; and A fan is connected to an end of the valve body away from the sealing assembly, and the sensor is electrically connected to the fan.

2. The explosion-proof vent valve according to claim 1, characterized in that: The sealing assembly comprises an elastic member, and one end of the movable rod away from the sealing valve has a stop portion. The elastic member is sleeved on the movable rod and is located between the bottom wall of the containing groove and the stop portion.

3. The explosion-proof vent valve according to claim 2, characterized in that: The bottom wall of the containing groove is provided with a limiting groove, the movable rod is movably arranged through the bottom wall of the limiting groove and is connected with the sealing valve, and a part of the structure of the elastic member is accommodated and limited in the limiting groove.

4. The explosion-proof vent valve according to claim 1, characterized in that: The fan includes a fan blade and a drive motor, the drive motor is arranged on the bottom wall of the container, the fan blade is connected to an end of the valve body away from the sealing assembly, and the output shaft of the drive motor is connected to the fan blade; the explosion-proof air valve includes an electromagnetic rod, the electromagnetic rod is arranged on the bottom wall of the container near the drive motor, and the electromagnetic rod is electrically connected to the sensor and the drive motor respectively.

5. The explosion-proof vent valve according to any one of claims 1 to 4, characterized in that: The valve body includes a protective cover and a mounting seat, the protective cover is provided with a guide channel, the mounting seat is connected to one side of the protective cover and encloses the receiving groove, the mounting seat is provided with the through hole, the movable rod is movably inserted through the mounting seat and connected to the sealing valve; the mounting seat is provided with a first limiting step on the side facing away from the protective cover, and a partial structure of the sealing valve abuts against the first limiting step for limiting.

6. The explosion-proof vent valve according to claim 5, characterized in that: The explosion-proof air valve includes an air-permeable structure, which includes a mounting frame and an air-permeable membrane. The mounting frame is located between the mounting base and the sealing valve. The mounting frame is provided with an air-permeable hole, which is communicated with the guide channel. The sealing valve is provided with an mounting hole corresponding to the air-permeable hole. A second limiting step is formed on the inner peripheral wall of the air-permeable hole, and the air-permeable membrane is connected to the second limiting step.

7. The explosion-proof vent valve according to claim 6, characterized in that: The ventilation structure includes a pressure cover, and a plurality of first clamping parts are formed at intervals on the side of the pressure cover facing the mounting frame, and a plurality of second clamping parts are formed at intervals on the inner peripheral wall of the ventilation hole, and each of the first clamping parts is clamped with one of the second clamping parts; a first ventilation groove is provided between any two adjacent first clamping parts, and a second ventilation groove is formed between any two adjacent second clamping parts, and each of the first ventilation grooves is arranged corresponding to one of the second ventilation grooves, and the pressure cover is gap-matched with the inner peripheral wall of the mounting hole.

8. The explosion-proof vent valve according to claim 5, characterized in that: The protective cover is provided with a wire passing hole; and / or The explosion-proof air valve includes a sealing ring, the area of ​​a side wall of the mounting seat facing the protective cover is larger than the cross-sectional area of ​​the protective cover, a side wall of the mounting seat facing the protective cover is provided with a mounting ring groove surrounding the protective cover, and the sealing ring is arranged in the mounting ring groove.

9. The explosion-proof vent valve according to claim 5, characterized in that: The explosion-proof air valve also includes two fasteners. Two connecting columns are formed at intervals on the side of the mounting seat facing the protective cover. The two connecting columns are passed through the protective cover and the fan. Each fastener is connected to a connecting column, and a partial structure of the fastener abuts against a partial structure of the fan to limit the position.

10. A battery box, characterized in that: It comprises the explosion-proof vent valve as claimed in any one of claims 1 to 9.

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