Explosion-proof valve, battery pack and vehicle

Abstract

The utility model discloses an anti-explosion valve, a battery pack and a vehicle, and relates to the technical field of anti-explosion valves, the anti-explosion valve comprises a valve body, a movable part and a driving device; an exhaust channel is arranged in the valve body, and the valve body is provided with an avoiding opening communicated with the exhaust channel. The movable part is movably arranged in the exhaust channel so as to have a closed state for blocking the exhaust channel and a pressure relief state for conducting the exhaust channel; the driving device is arranged outside the valve body, and the output end of the driving device can be connected with the movable part through the receding opening so as to control the movable part to be switched between the pressure relief state and the closed state. According to the technical scheme, opening and closing of the anti-explosion valve are actively controlled through the driving device, and the reliability of the anti-explosion valve is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of explosion -proof valve, especially relates to a kind of explosion -proof valve, battery pack and vehicle. BACKGROUND

[0002] Battery may face various abnormal conditions in use process, such as overcharge, overdischarge, short circuit, internal short circuit, high temperature environment etc., these abnormal conditions can cause the pressure in battery to rise sharply, and then cause battery to swell, leakage and even explosion and other serious safety accidents. In the related art, the explosion-proof valve is usually opened by the large pressure difference between the inside and outside of the battery to quickly release the gas in the battery pack, and then the pressure difference between the inside and outside of the battery will decrease rapidly, and the explosion-proof valve is closed again. However, after the explosion-proof valve is closed again, there is still a certain high-temperature and high-pressure gas in the battery pack, which still damages the battery pack. SUMMARY

[0003] The main purpose of the utility model is to provide an explosion-proof valve, a battery pack and a vehicle, which actively control the opening and closing of the explosion-proof valve through a driving device to improve the reliability of the explosion-proof valve.

[0004] To achieve the above-mentioned purpose, the explosion-proof valve provided by the utility model comprises:

[0005] A valve body is provided with an exhaust passage, and the valve body is provided with an avoidance opening communicating with the exhaust passage;

[0006] A movable part is movably arranged in the exhaust passage to have a closed state of plugging the exhaust passage and a pressure relief state of conducting the exhaust passage; and

[0007] A driving device is arranged outside the valve body, and the output end of the driving device can be connected with the movable part through the avoidance opening to control the switching of the movable part between the pressure relief state and the closed state.

[0008] In an embodiment, the movement direction of the output end of the driving device is parallel to the movement direction of the movable part.

[0009] In an embodiment, the valve body is further provided with a gas discharge opening communicating with the exhaust passage, the movable part comprises a connecting guide rod and a cover body, the cover body is movably arranged in the gas discharge opening, and the end of the guide rod away from the cover body is opposite to the avoidance opening, and the driving device is used for pushing the guide rod.

[0010] In an embodiment, the valve body comprises a mounting portion and a protruding portion connected together, the air vent is arranged on the mounting portion, the avoiding opening is arranged on the end of the protruding portion, the guide rod is movably arranged in the protruding portion, and the driving device is arranged outside the end of the protruding portion away from the mounting portion and connected to the mounting portion.

[0011] In an embodiment, the driving device is connected to the mounting portion by screwing.

[0012] In an embodiment, the driving device comprises a driving body and a connecting portion, the driving body is connected to the connecting portion and arranged outside the end of the protruding portion, and the connecting portion is connected to the mounting portion by screwing.

[0013] In an embodiment, the connecting portion is arranged protruding from the circumferential side of the driving body, and a plurality of screws are distributed on the circumference of the connecting portion.

[0014] In an embodiment, the screw is sleeved with a protection cylinder, and the protection cylinder is clamped between the connecting portion and the mounting portion.

[0015] In an embodiment, the valve body further comprises an air vent communicating with the exhaust passage, the air vent and the avoiding opening are arranged on opposite sides of the valve body, and the movable member is arranged opposite to the avoiding opening along the moving direction.

[0016] In an embodiment, the driving device is provided with a first connecting end and a second connecting end, the first connecting end is used to electrically connect with the battery of the battery pack, and the second connecting end is used to electrically connect with the battery management system.

[0017] In an embodiment, the driving device is configured as a motor.

[0018] The utility model further provides a battery pack, the battery pack includes the explosion -proof valve like aforementioned.

[0019] The utility model further provides a vehicle, the vehicle includes the battery pack like aforementioned.

[0020] The technical scheme of the utility model discloses an avoiding port is arranged on the valve body, and a driving device is installed outside the valve body, and the driving device can control the switching of the movable part between the closed state and the pressure relief state through the avoiding port, so that in the closed state, the movable part closes the exhaust passage, and the explosion-proof valve plays a sealing role in the closed state to prevent the internal and external substances from flowing along the exhaust passage, when the internal pressure of the battery pack abnormally rises, the movable part can be passively opened to the exhaust passage through the air pressure difference to the pressure relief state, and the internal excessive pressure is released in time, the movable part can also be switched to the pressure relief state through the driving device and the avoiding port to actively open the exhaust passage, and then the internal pressure can be actively regulated, the risk is prevented in advance, the damage to the battery pack in the early stage of abnormal occurrence is reduced, meanwhile, after the internal gas is discharged to a certain extent, the driving device continues to control the driving part to keep in the pressure relief state, the internal abnormal gas is discharged as much as possible, the damage to the battery pack is reduced, and the use reliability of the explosion-proof valve is improved, in addition, the driving device is arranged outside the valve body, the original valve body and the movable part are not changed, and the development difficulty and cost are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structure shown in the drawings without the creative labor of the ordinary skilled in the art.

[0022] Figure 1 The structural schematic diagram of an embodiment of the explosion-proof valve provided by the utility model is shown in the figure.

[0023] Figure 2 The sectional view of the explosion-proof valve is shown in the figure. Figure 1

[0024] Figure 3 The enlarged view of A in the figure. Figure 2

[0025] Figure 4 The structural schematic diagram of another view of the explosion-proof valve provided by the utility model is shown in the figure.

[0026] Explanation of the drawing reference numeral:

[0027] 100, valve body, 110, mounting portion, 111, air vent, 120, protruding portion, 121, avoiding port, 130, exhaust passage, 140, elastic part, 200, movable part, 210, guide rod, 211, limiting flange, 220, cover body,

[0028] ​​300, drive device; 310, drive body; 320, connecting portion; 330, first connecting end; 340, second connecting end; 350, bolt; 360, protection cylinder.

[0029] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

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

[0032] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the entire text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0033] In the prior art, the battery pack may face various abnormal situations during use, so that the battery pack is damaged due to a large pressure inside the battery pack. To this end, an explosion-proof valve is usually arranged on the battery pack to release the large pressure inside the battery pack. In the related art, the explosion-proof valve is a mechanical explosion-proof valve which is passively opened and closed by a large gas pressure inside the battery pack. However, such an explosion-proof valve needs a high pressure difference between the inside and outside of the battery pack to be opened. Before the battery pack generates a high pressure inside, the high-temperature gas inside the battery pack has been accumulated for a long time, and the battery has been damaged to a certain extent. Similarly, after the explosion-proof valve is opened, the pressure of the battery pack is quickly released, and then becomes a slow exhaust for a long time. However, at this time, the pressure difference between the inside and outside of the battery pack has decreased, and the explosion-proof valve is closed immediately. The high-temperature and high-pressure gas is still left in the battery pack, and the battery pack is damaged.

[0034] The utility model provides a kind of explosion-proof valve.

[0035] Please refer to Figures 1 to 3 In an embodiment of the utility model, the explosion-proof valve comprises:

[0036] Valve body 100, exhaust passage 130 is arranged in valve body 100, and valve body 100 is provided with the avoidance mouth 121 being communicated with exhaust passage 130;

[0037] Movable part 200, movable part 200 is movably arranged in exhaust passage 130, to have the closed state of plugging exhaust passage 130 and the pressure relief state of leading through exhaust passage 130;And

[0038] Driving device 300, driving device 300 is arranged outside valve body 100, and the output end of driving device 300 can be connected with movable part 200 via avoidance mouth 121, to control movable part 200 between pressure relief state and closed state Switching.

[0039] The technical scheme of the utility model discloses a relief port 121 is arranged on the valve body 100, and a driving device 300 is installed outside the valve body 100, and the driving device 300 can control the movable part 200 to switch between the closed state and the pressure relief state through the relief port 121. In this way, in the closed state, the movable part 200 closes the exhaust passage 130, and the explosion-proof valve plays a sealing role, preventing the internal and external substances from flowing along the exhaust passage 130. When the internal pressure of the battery pack abnormally rises, the movable part 200 can be passively opened to the exhaust passage 130 through the pressure difference, and the pressure relief state is reached, and the internal overpressure is released in time. The driving device 300 can also drive the movable part 200 to switch to the pressure relief state through the relief port 121, actively opening the exhaust passage 130, and actively regulating the internal pressure, preventing the risk from occurring in advance, reducing the damage to the battery pack in the early stage of abnormality, and at the same time, the driving device 300 can continue to control the driving part to remain in the pressure relief state after the internal gas is discharged to a certain extent, the internal abnormal gas is discharged as much as possible, the damage to the battery pack is reduced, and the use reliability of the explosion-proof valve is improved. In addition, the driving device 300 is arranged outside the valve body 100, which reduces the modification of the original valve body 100 and the movable part 200, and reduces the development difficulty and cost.

[0040] It can be understood that, compared with the original pure passive opening and closing explosion-proof valve, the explosion-proof valve of the embodiment has passive and active pressure relief modes. The active pressure relief mode realized by the driving device 300 can control the movable part 200 to maintain in the pressure relief state for a period of time after the abnormality occurs in the battery pack and the gas is discharged, thereby reducing the accumulation of high-temperature and high-pressure gas in the battery pack and reducing the damage to the battery pack. Without loss of generality, various sensors can be arranged in the battery pack to monitor various parameters in the battery pack. On the one hand, once an abnormal parameter occurs, the movable part 200 can be switched to the pressure relief state through the driving device 300 through the relief port 121, so that the corresponding parameter in the battery pack returns to the normal range. In this process, the pressure difference between the inside and outside of the battery pack is not enough to passively switch the movable part 200 to the pressure relief state, thereby realizing the early protection of the battery pack through the active control of the movable part 200 and reducing the damage to the battery pack. On the other hand, when the movable part 200 in the pressure relief state switches back to the closed state, the battery pack still has certain abnormal gas. At this time, the driving device 300 keeps the movable part 200 in the pressure relief state, so that the movable part 200 is not passively reset to the closed state, the pressure relief time is prolonged, and the driving device 300 controls the movable part 200 to reset to the closed state after the sensor detects that the parameters in the battery pack are normal.

[0041] It can be understood that the driving device 300 is arranged outside the valve body 100, and the original mechanical explosion-proof valve is not changed too much. The exhaust passage 130 is still connected to the battery pack and can be connected to the outside. The driving device 300 controls the movement of the movable part 200 through the avoidance opening 121 arranged in the valve body 100, so that the explosion-proof valve has the function of active pressure relief, ensures the reliability of the explosion-proof valve, and is convenient for subsequent maintenance and replacement of the driving device 300. For the opening and closing control of the movable part 200 to the exhaust passage 130, the movable part 200 can be arranged in the valve body 100 to control the opening and closing of the exhaust passage 130, so as to realize the switching between the closed state and the pressure relief state. The movable part 200 can also be arranged in the opening of the exhaust passage 130 on the outer surface of the valve body 100 to control the opening and closing, so as to realize the switching between the closed state and the pressure relief state of the movable part 200. For the application environment of the explosion-proof valve, it can be the battery pack of various devices, such as vehicles, lawn mowers, robots, etc. In this technical solution, the vehicle is introduced.

[0042] In an embodiment, please refer to Figure 2 and Figure 3 The valve body 100 also has a gas discharge opening 111 connected to the exhaust passage 130. The gas discharge opening 111 and the avoidance opening 121 are arranged on opposite sides of the valve body 100, and the movable part 200 is arranged opposite the avoidance opening 121 along the movement direction. It should be noted that the explosion-proof valve is installed in the battery pack, the gas discharge opening 111 is on the side outside the battery pack, the avoidance opening 121 is on the side inside the battery pack, and the driving device 300 is inside the battery pack, thereby avoiding the interference of foreign matter outside the battery pack with the operation of the driving device 300, and ensuring the operation stability of the driving device 300. At the same time, the movable part 200 is opposite the avoidance opening 121 along the movement direction, and the movement of the movable part 200 provides clear direction guidance, so that the movable part 200 can move in the predetermined direction under the action of the driving device 300, thereby accurately realizing the opening and closing actions of the exhaust passage 130, and simplifying the transmission structure of the driving device 300 for switching the movable part 200 between the closed state and the pressure relief state. Of course, in other embodiments, the driving device 300 can be arranged on the side of the explosion-proof valve outside the battery pack, or the avoidance opening 121 is arranged in the direction intersecting the movement direction of the movable part 200, and the driving device 300 controls the movable part 200 to switch between the closed state and the pressure relief state through the transmission structure.

[0043] Further, in this embodiment, please refer to Figure 1 and Figure 2The moving direction of the output end of the driving device 300 is parallel to the moving direction of the moving part 200. It can be understood that the force generated by the driving device 300 can be directly and effectively transmitted to the moving part 200, reducing the power loss caused by the transmission structure arranged to change the output direction of the driving device 300, and improving the energy efficiency utilization of the driving device 300. At the same time, it can also reduce the transmission structure arranged to change the action direction of the output end of the driving device 300, simplify the structure of the explosion-proof valve, and also reduce the cost and installation space. Of course, in other embodiments, the moving direction of the output end of the driving device 300 can also intersect with the moving direction of the moving part 200, and the driving device 300 changes the action direction through the transmission structure, thereby controlling the moving part 200 to switch between the closed state and the pressure relief state.

[0044] For the driving device 300, in an embodiment, please refer to Figure 1 and Figure 4 The driving device 300 is configured as a motor. Without loss of generality, the driving device 300 also has a structure for connecting the motor to the valve body 100, wherein the connection structure can be part of the motor, that is, integrated with the motor, or can be separately arranged from the motor to install the motor on the valve body 100. In this way, the output end of the motor can act on the moving part 200 through the avoiding opening 121 to provide the moving part 200 with the required power, so that the moving part 200 can move in the valve body 100 to actively switch between the pressure relief state and the closed state. At the same time, the motor has good controllability to accurately control the movement position and speed of the moving part 200, ensuring that the opening degree of the exhaust passage 130 can be accurately adjusted according to actual needs, improving the working precision and reliability of the explosion-proof valve. Of course, in other embodiments, the driving device 300 can also be configured as a gas cylinder or an oil cylinder.

[0045] In an embodiment, please refer to Figure 2 and Figure 3The valve body 100 is further provided with a gas release port 111 communicating with the exhaust passage 130, the movable member 200 comprises a guide rod 210 and a cover 220 connected with each other, the cover 220 is movably arranged at the gas release port 111, and the end of the guide rod 210 away from the cover 220 is opposite to the avoiding port 121. The driving device 300 is used to push the guide rod 210. It can be understood that when the movable member 200 is in the closed state, the gas release port 111 is closed by the cover 220, and when the movable member 200 is in the pressure relief state, the gas release port 111 is opened by the cover 220. Therefore, in the process of opening the gas release port 111 by the cover 220, the guide rod 210 moves with the cover 220, and the movement of the guide rod 210 can accurately reflect the switching of the movable member 200 between the closed state and the pressure relief state. The avoiding port 121 and the guide rod 210 are opposite along the moving direction of the movable member 200, and the driving device 300 can act on the guide rod 210 through the avoiding port 121, so that the movable member 200 can be actively switched between the closed state and the pressure relief state, thereby ensuring the use reliability of the explosion-proof valve. At the same time, the guide rod 210 is in a relatively central position of the movable member 200, and the driving device 300 acts on the guide rod 210, so that the movable member 200 can be actively opened and closed to the gas release port 111 along the original moving direction, and the explosion-proof valve can maintain the use stability when the driving device 300 controls the opening and closing of the explosion-proof valve. Of course, in other embodiments, the avoiding port 121 can also be opposite to the cover 220 along the moving direction of the movable member 200, and the driving device 300 acts on the cover 220 through the avoiding port 121 to control the switching of the movable member 200 between the closed state and the pressure relief state.

[0046] Further, in the present embodiment, please refer to Figure 1 、 Figure 2 and Figure 4The valve body 100 comprises a mounting portion 110 and a protruding portion 120 connected with each other, the air vent 111 is arranged on the mounting portion 110, the avoiding opening 121 is arranged on the end of the protruding portion 120, the guide rod 210 is movably arranged in the protruding portion 120, the driving device 300 is arranged outside the end of the protruding portion 120 away from the mounting portion 110 and connected with the mounting portion 110. It can be understood that the arrangement of the mounting portion 110 and the protruding portion 120 provides a specific layout space for the driving device 300 and the guide rod 210, so that the components are orderly distributed on the valve body 100. Meanwhile, the driving device 300 is arranged outside the end of the protruding portion 120 away from the mounting portion 110 and connected with the mounting portion 110, which is beneficial to drive the guide rod 210 by the driving device 300, such as simplifying the transmission structure of the driving device 300 driving the guide rod 210, avoiding the interference of the driving device 300 to the cover body 220, ensuring the sealing performance of the cover body 220 closing the air vent 111, and ensuring the installation stability of the driving device 300 by using the stability of the mounting portion 110. In addition, the external force on the protruding portion 120 can be reduced, the stability of the movable part 200 moving in the valve body 100 can be ensured, and the influence of the driving device 300 on the valve body 100 and the movable part 200 can be reduced. The driving device 300 pushes the guide rod 210 to move by the avoiding opening 121 on the free end of the protruding portion 120 under the support of the mounting portion 110, and then drags the cover body 220 to move along the moving direction of the movable part 200. Of course, in other embodiments, the driving device 300 can be installed on the protruding portion 120, and the protruding portion 120 is stably connected with the mounting portion 110 through other connecting structures.

[0047] In an embodiment, referring to Figure 2 and Figure 3The valve body 100 is further provided with an elastic member 140, the end of the guide rod 210 away from the cover body 220 is provided with a limiting flange 211, the elastic member 140 is sleeved on the guide rod 210, and the two ends are respectively abutted against the valve body 100 and the limiting flange 211. After the cover body 220 is pushed up by the air pressure to open the air vent 111, the movable member 200 moves towards the air vent 111, the elastic member 140 is compressed to an elastic compression state by the limiting flange 211, and the corresponding movable member 200 is in a pressure relief state. After the internal and external air pressure difference of the battery pack is balanced, the elastic member 140 will exert a force on the guide rod 210 in the closing direction due to the elastic potential energy, so as to drive the cover body 220 to return to the position of closing the air vent 111, so as to drive the movable member 200 to reset from the pressure relief state to the closed state. In this way, the driving device 300 only needs to exert a pushing force on the guide rod 210 from the closed state to the pressure relief state, without the need to control the entire movement process of the guide rod 210, thereby reducing the connection form of the driving device 300 and the guide rod 210, and avoiding the interference of the driving device 300 on the passive movement of the guide rod 210. In addition, in the closed state, the elastic member 140 is also in an elastic state to ensure the stability of the movable member 200 in the closed state, wherein the elastic member 140 is configured as a compression spring. Of course, in other embodiments, the elastic member 140 can also be configured as a tension spring, acting between the cover body 220 and the mounting portion 110.

[0048] In an embodiment, please refer to Figure 1 、 Figure 2 and Figure 4 The driving device 300 is connected to the mounting portion 110 by bolt 350 locking. It can be understood that the bolt 350 locking can provide a larger fastening force, so that the driving device 300 and the mounting portion 110 are tightly connected, effectively preventing the driving device 300 from loosening or shifting due to vibration, impact and other factors during the operation of the explosion-proof valve, ensuring the position stability of the driving device 300, and thus ensuring the continuous and stable driving effect of the driving device 300 on the guide rod 210. At the same time, the installation process of the bolt 350 locking is relatively simple, only the bolt 350 needs to pass through the corresponding mounting holes on the driving device 300 and the mounting portion 110, and then a nut is used for fastening, which simplifies the installation difficulty and is convenient for subsequent maintenance and replacement. In addition, the bolt connection can be adjusted adaptively according to the relative position of the driving device 300 and the mounting portion 110, so as to ensure that the output end of the driving device 300 can be accurately positioned to avoid the port 121 and ensure the installation precision. Of course, in other embodiments, the driving device 300 can also be connected to the mounting portion 110 by welding.

[0049] Specifically, in the present embodiment, please continue to refer to Figure 2The driving device 300 comprises a driving body 310 and a connecting part 320, the driving body 310 is connected to the connecting part 320 and is located outside the end of the protruding part 120, and the connecting part 320 is connected to the mounting part 110 through bolts 350. It can be understood that the driving body 310 is first mounted on the connecting part 320, and then the connecting part 320 is connected to the mounting part 110. The driving body 310 acts on the guide rod 210 through the avoiding opening 121, and the connecting part 320 is also provided with an avoiding opening corresponding to the space between the avoiding opening 121 and the driving body 310, so that the driving body 310 can act on the guide rod 210. In this way, the driving device 300 is connected to the mounting part 110 through the connecting part 320 and the bolts 350, forming a stable structure, and will not damage the driving body 310, ensuring the driving stability of the driving body 310 to the movable part 200. At the same time, it can also ensure that the driving body 310 corresponds to the end outside the avoiding opening 121 provided on the protruding part 120. In addition, the connecting part 320 and the driving body 310 are separately provided, and after the connecting part 320 is connected to the mounting part 110, the driving body 310 is mounted on the connecting part 320 to complete the installation of the driving device 300, and the subsequent maintenance and replacement of the driving body 310 can be realized, improving the convenience of disassembly and maintenance. Of course, in other embodiments, the driving device 300 can also be provided as an integral component and directly connected to the mounting part 110.

[0050] Further, in the present embodiment, please refer to Figure 3 , Figure 1 and Figure 2 , the connecting part 320 is protrudingly arranged on the circumferential side of the driving body 310, and a plurality of bolts 350 are distributed on the circumference of the connecting part 320. It can be understood that the bolts 350 and the protruding part 120 are arranged in parallel, and the connecting part 320 is also located outside the exposed end of the protruding part 120, providing installation space for the installation of the driving body 310. Here, the bolts 350 are configured as long strip-shaped bolts 350 and are distributed along the circumference of the connecting part 320 in the circumferential direction of the driving body 310. In this way, the plurality of bolts 350 can resist the shear force brought by the start of the driving body 310, ensuring the stability of the driving body 310 on the connecting part 320. At the same time, it can also disperse the stress position of the mounting part 110, reducing the probability of damage to the mounting part 110. In addition, the connecting part 320 is protrudingly arranged on the circumferential side of the driving body 310, and the exposed part of the connecting part 320 is connected with the bolts 350, reducing the interference of the bolts 350 on the driving body 310. Of course, in other embodiments, the bolts 350 can also be directly connected to the driving body 310.

[0051] For the connection structure of the bolts 350, in an embodiment, please refer to Figure 4 and Figures 1 to 3The bolt 350 is sleeved with a protective cylinder 360, which is clamped between the connecting portion 320 and the mounting portion 110. It can be understood that the protective cylinder 360 provides support for the connecting portion 320, so that the driving body 310, the connecting portion 320 and the protruding portion 120 are arranged at intervals, avoiding the effect of the driving device 300 on the protruding portion 120, and ensuring the stability of the movable part 200 in the moving direction. At the same time, the protective cylinder 360 also weakens the external force received by the bolt 350 in the axial direction, so that the bolt 350 is not easy to loosen when bearing external forces such as vibration and impact, and also avoids the situation that the bolt 350 is fatigued or broken due to excessive local stress, thereby ensuring the connection stability of the driving device 300 and the mounting portion 110. In addition, the protective cylinder 360 can isolate the bolt 350 from the external environment, prevent the surface of the bolt 350 from being corroded, oxidized and damaged, and prolong the service life of the bolt 350. Of course, in other embodiments, the bolt 350 can also be connected to the mounting portion 110 in a bare state, or connected to the mounting portion 110 through an adapter structure.

[0052] In an embodiment, please refer to Figure 1 and Figure 2 Figure 4 Figure 1 Figure 2 Figure 1 Figure 2 The driving device 300 is provided with a first connecting end 330 and a second connecting end 340, the first connecting end 330 is used to be electrically connected with the storage battery of the battery pack, and the second connecting end 340 is used to be electrically connected with the battery management system. The driving device 300 is electrically connected with the storage battery of the battery pack through the first connecting end 330, thereby ensuring the stability of the driving device 300. After the battery management system receives an abnormal data signal in the battery pack, it is judged that the battery pack has the risk of thermal runaway, and then a control instruction is sent to the driving device 300 through the second connecting end 340, so that the driving device 300 drives the movable part 200 to open the exhaust passage 130, completes the valve opening, and discharges the high-temperature gas in the battery pack. Correspondingly, when the battery management system receives that the data in the battery pack returns to normal, it is judged that the environment in the battery pack has stabilized, and then a control instruction is sent to the driving device 300 through the second connecting end 340, so that the driving device 300 controls the movable part 200 to close the exhaust passage 130, completes the valve closing, thereby discharging the high-temperature gas to the greatest extent. Of course, in other embodiments, the first connecting end 330 can also be connected to other power sources of the vehicle instead of the storage battery of the battery pack, and the second connecting end 340 can also be connected to other control systems of the vehicle, such as the car audio system, instead of being directly connected to the battery management system.

[0053] The utility model discloses still put forward a kind of battery pack, the battery pack includes explosion-proof valve, the specific structure of the explosion-proof valve refers to above-mentioned embodiment, since the battery pack has adopted all technical solutions of above-mentioned all embodiments, therefore at least have all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer one by one elaboration.Equipment, explosion-proof valve is installed on the lateral wall of battery pack, and can be communicated in battery pack interior.

[0054] The utility model discloses still put forward a kind of vehicle, the vehicle includes battery pack, the specific structure of the battery pack refers to above-mentioned embodiment, since the vehicle has adopted all technical solutions of above-mentioned all embodiments, therefore at least have all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer one by one elaboration.

[0055] The above-mentioned is only the exemplary implementation of the utility model, and not therefore limit the patent range of the utility model, is in the technical concept of the utility model, utilizes the equivalent structural transformation of the utility model specification and attached drawing contents, or direct / indirectly applies in other relevant technical field all include in the patent protection range of the utility model.

Claims

1. An explosion relief valve, characterized in that The valve body is provided with an exhaust passage, and an avoiding port is formed in the valve body and communicates with the exhaust passage. An active element is movably arranged in the exhaust passage to have a closed state for blocking the exhaust passage and a pressure relief state for conducting the exhaust passage. A driving device is arranged outside the valve body, and an output end of the driving device is connected with the active element through the avoiding port to control the active element to switch between the pressure relief state and the closed state. The moving direction of the output end of the driving device is parallel to the moving direction of the active element. The valve body is further provided with a vent port communicating with the exhaust passage, the active element comprises a guide rod and a cover body connected with each other, the cover body is movably arranged in the vent port, and the end of the guide rod away from the cover body is opposite to the avoiding port.

2. The explosion relief valve of claim 1, wherein The driving device is used for pushing the guide rod.

3. The explosion relief valve of claim 1, wherein The valve body comprises a mounting portion and a protruding portion connected with each other, the vent port is arranged in the mounting portion, the avoiding port is arranged at the end of the protruding portion, the guide rod is movably arranged in the protruding portion, and the driving device is located outside the end of the protruding portion away from the mounting portion and connected with the mounting portion.

4. The explosion relief valve of claim 3, wherein The driving device is connected with the mounting portion by screwing.

5. The explosion relief valve of claim 4, wherein, The driving device comprises a driving body and a connecting portion, the driving body is connected with the connecting portion and located outside the end of the protruding portion, and the connecting portion is connected with the mounting portion by screwing.

6. The explosion relief valve of claim 5, wherein, The connecting portion is protruded from the circumferential side of the driving body, and a plurality of screws are distributed on the circumferential edge of the connecting portion.

7. The explosion relief valve of claim 6, wherein The screw is sleeved with a protection cylinder, and the protection cylinder is clamped between the connecting portion and the mounting portion. The valve body is further provided with a vent port communicating with the exhaust passage, the vent port and the avoiding port are arranged on opposite sides of the valve body, and the active element is arranged opposite to the avoiding port along the moving direction.

8. The explosion relief valve of claim 1, wherein The driving device is provided with a first connecting end and a second connecting end, the first connecting end is used for electrically connecting with a battery of a battery pack, and the second connecting end is used for electrically connecting with a battery management system. The driving device is configured as an electric motor. The explosion-proof valve comprises any one of the valves according to claims 1 to 8.

9. A battery pack, characterized by, The battery pack comprises the explosion-proof valve according to claim 9.

10. A vehicle characterized by comprising: ​

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