Liquid leakage valve, battery pack and vehicle

Abstract

The utility model discloses a liquid leakage valve, a battery pack and a vehicle, and relates to the technical field of safety valves, the liquid leakage valve comprises a valve body, a movable part and a driving mechanism; a liquid discharge channel is arranged in the valve body; the movable part is movably arranged on the liquid discharge channel so as to have a closed state of blocking the liquid discharge channel and a liquid discharge state of conducting the liquid discharge channel; the driving mechanism is electrically connected to the control module and can drive the movable part to be switched between the closed state and the liquid discharging state. According to the technical scheme, the opening and closing efficiency and reliability of the liquid leakage valve are improved in the mode of actively opening the liquid leakage valve.

Description

Leakage valve, battery pack and vehicle Technical Field

[0001] This utility model relates to the field of safety valve technology, and in particular to a leakage valve, a battery pack, and a vehicle. Background Technology

[0002] During use, battery packs may produce liquid due to various reasons, and a drain valve is usually installed to drain this liquid and maintain a stable internal environment. In related technologies, after the drain valve is opened to drain the liquid, it needs a certain period of time before it can be closed. During this time, the battery pack continues to operate while connected to the outside world, and external impurities can easily enter the battery through the drain valve, affecting battery use or even damaging the battery. Summary of the Invention

[0003] The main purpose of this invention is to provide a leakage valve, a battery pack, and a vehicle, which aims to improve the opening and closing response efficiency and reliability of the leakage valve by actively opening it.

[0004] To achieve the above objectives, the leakage valve proposed in this utility model includes:

[0005] Valve body, wherein a drain channel is provided within the valve body; and

[0006] A movable component is movably disposed in the drainage channel to have a closed state that blocks the drainage channel and a drainage state that opens the drainage channel.

[0007] The leakage valve has a drive mechanism electrically connected to the control module, which can drive the movable part to switch between the closed state and the drainage state.

[0008] In one embodiment, the drive mechanism is equipped with a magnetic coupling mechanism, including a first coupling part fixed to the valve body and a second coupling part fixed to the movable member. At least one of the first coupling part and the second coupling part is an electromagnet. When the electromagnet is energized, the magnetic force of the first coupling part and the second coupling part drives the movable member to switch to the closed state or the draining state.

[0009] In one embodiment, the movable member passes through the first coupling part, and one end is used to block the drainage channel, while the other end is provided with the second coupling part. The first coupling part and the second coupling part are coupled by magnetic attraction.

[0010] In one embodiment, the first coupling part is configured as the electromagnet, and the second coupling part is configured as a ferromagnet.

[0011] In one embodiment, the electromagnet is provided with a magnetic conductive element on the opposite side of the first coupling portion and the second coupling portion.

[0012] In one embodiment, the drive mechanism is further provided with an elastic reset member, which extends along the movement direction of the movable member and is connected at both ends to the valve body and the movable member, respectively. After the electromagnet is energized, the magnetic coupling mechanism drives the movable member to switch to the drain state. After the electromagnet is de-energized, the elastic reset member causes the movable member to switch to the closed state.

[0013] In one embodiment, the movable member passes through the first coupling portion and has a second coupling portion at its end. The elastic reset member is sleeved on the movable member and sandwiched between the second coupling portion and the valve body. The first coupling portion is spaced apart on the outer periphery of the elastic reset member.

[0014] In one embodiment, the valve body further includes a receiving cavity and a drain port, the receiving cavity and the drain channel being independently connected to the drain port, the movable component including a guide rod and a cover, the driving mechanism being located in the receiving cavity and acting on the guide rod, the cover being movably disposed in the drain port, and the guide rod being connected to the cover from the receiving cavity.

[0015] In one embodiment, the drive mechanism is provided with a first connection end and a second connection end. The first connection end is used to electrically connect to the battery of the battery pack, the control module is configured as a battery management system, and the second connection end is used to electrically connect to the battery management system.

[0016] In one embodiment, a liquid level detection element and a liquid level tank are further provided outside the valve body. The liquid level detection element is used to detect the liquid level in the liquid level tank and can output a liquid level signal to the control module.

[0017] This utility model also proposes a battery pack, which includes the aforementioned leakage valve.

[0018] This utility model also proposes a vehicle that includes the battery pack as described above.

[0019] The technical solution of this utility model involves installing a drive mechanism on the valve body, which is electrically connected to a control module. The control module outputs a control signal to the drive mechanism, causing the drive mechanism to switch the movable part between a closed state and a draining state. In the closed state, the movable part closes the drain channel, and the leak valve acts as a seal, preventing internal and external substances from flowing along the drain channel and ensuring the stability of the internal environment. When liquid accumulates in the battery pack, the control module outputs an open valve signal to the drive mechanism, which then drives the movable part to switch to the draining state, thereby opening the drain channel and draining the internal liquid. After the internal liquid is drained, the control module outputs a close valve signal to the drive mechanism, which then drives the movable part to switch to the closed state, promptly sealing the drain channel. This prevents the drain channel from remaining open to the outside after the liquid has been drained, reducing the intrusion of external impurities and ensuring the internal environment quickly returns to a stable state. This improves the opening and closing response efficiency and reliability of the leak valve, and reduces damage to the battery pack. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 is a structural schematic diagram of an embodiment of the leakage valve provided by this utility model;

[0022] Figure 2 is a cross-sectional view of the leakage valve in Figure 1;

[0023] Figure 3 is a magnified view of part A in Figure 2;

[0024] Figure 4 is a perspective view of the leakage valve in Figure 1 from another angle;

[0025] Figure 5 is a perspective view of the leakage valve in Figure 1 from another angle.

[0026] Explanation of icon numbers:

[0027] 100. Valve body; 110. Drainage channel; 111. Drainage port; 112. Liquid passage port; 120. Receptacle; 130. Liquid level detection element; 140. Elastic reset element; 150. Liquid level tank; 200. Moving part; 210. Guide rod; 220. Cover;

[0028] 300, Magnetic coupling mechanism; 310, First coupling part; 320, Second coupling part; 330, Magnetic conductor.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] In existing technologies, battery packs may encounter various abnormal situations during use, such as water ingress, electrolyte corrosion and leakage, and battery pack damage. These can all lead to liquid accumulation inside the battery pack, which can damage the internal cells and disrupt the internal environment. To address this, a drain valve is typically installed on the battery pack to drain the accumulated liquid. In related technologies, the drain valve is a mechanical type with absorbent paper inside. When liquid accumulates inside the battery pack, the absorbent paper expands due to water absorption, pushing the valve cover to open the drain valve. When closing the drain valve, the absorbent paper needs time to dry and shrink. Since the absorbent paper needs time to dry and shrink naturally after the liquid is drained, the battery pack remains in contact with the outside environment during this process. However, if the battery pack continues to operate normally during this time, not only can external impurities easily enter and damage the battery pack, but the internal pressure will also be affected by the continuous opening of the drain valve, thus affecting battery use or even damaging the battery.

[0034] This utility model proposes a leakage valve.

[0035] Please refer to Figures 1 to 3. In one embodiment of this utility model, the leakage valve includes:

[0036] Valve body 100, with a drain channel 110 inside; and

[0037] The movable component 200 is movably disposed in the drain channel 110, so as to have a closed state that blocks the drain channel 110 and a draining state that opens the drain channel 110.

[0038] The leakage valve has a drive mechanism that is electrically connected to the control module and can drive the movable part 200 to switch between a closed state and a drainage state.

[0039] The technical solution of this utility model is to install a drive mechanism on the valve body 100, and the drive mechanism and the control module are electrically connected. The control module outputs a control signal to the drive mechanism, so that the drive mechanism controls the movable part 200 to switch between the closed state and the liquid discharge state. Thus, in the closed state, the movable part 200 closes the drain channel 110. In the closed state, the drain valve acts as a seal, preventing internal and external substances from flowing along the drain channel 110 and ensuring the stability of the internal environment. When liquid accumulates in the battery pack, the control module outputs an open valve signal to the drive mechanism, which drives the movable part 200 to switch to the drain state, thereby opening the drain channel 110 and draining the internal liquid. After the internal liquid is drained, the control module outputs a close valve signal to the drive mechanism, which drives the movable part 200 to switch to the closed state, thereby promptly sealing the drain channel 110. This prevents the drain channel 110 from remaining connected to the outside after the liquid has been drained, reducing the intrusion of external impurities and their impact on use. It also allows the internal environment to return to a stable state in a timely manner, thereby improving the opening and closing response efficiency and reliability of the drain valve and reducing damage to the battery pack.

[0040] It is understood that, compared to the original passively opening and closing leakage valve, the leakage valve in this embodiment achieves opening and closing in an active manner. The drive mechanism is electrically connected to the control module and is controlled by the control signal of the control module. It can open the leakage valve in time when liquid accumulates inside the battery pack and close the leakage valve in time after the liquid is drained. It controls the movable part 200 to switch between the closed state and the draining state in time, or controls the movable part 200 to maintain the closed state or the draining state, thereby reducing the accumulation of liquid inside the battery pack and reducing the impact of the external environment on the internal environment of the battery pack through the draining channel 110, thereby reducing damage to the battery pack. Without loss of generality, various sensors can be installed inside the battery pack to monitor parameters that could lead to leakage or to monitor the liquid level. If an abnormal parameter causes liquid accumulation inside the battery pack or if the liquid level reaches a preset level, the control module can output an opening signal to the drive mechanism, which will then switch the movable part 200 to the draining state to drain the accumulated liquid from the battery pack. Once a parameter returns to normal or the liquid level drops below the preset level, the control module will output a closing signal to the drive mechanism, which will then switch the movable part 200 to the closed state, thereby reducing the impact on the environment inside the battery pack.

[0041] In one scenario, upon receiving an open valve signal from the control module, the electrical control unit of the drive mechanism is energized, driving the movable part 200 to open the drain channel 110 to switch to the drain state. Upon receiving a close valve signal from the control module, the electrical control unit of the drive mechanism is de-energized, and the reset part drives the movable part 200 to block the drain channel 110 to switch to the closed state, or the electrical control unit drives the movable part 200 to switch to the closed state. Alternatively, if no control signal is received from the control module, the electrical control unit of the drive mechanism remains energized to ensure that the movable part 200 remains in the closed state. Upon receiving an open valve signal from the control module, the electrical control unit of the drive mechanism is de-energized, and the open valve part of the drive mechanism drives the movable part 200 to open the drain channel 110 to switch to the drain state. Upon receiving a close valve signal from the control module, the electrical control unit of the drive mechanism is energized, driving the movable part 200 to block the drain channel 110 to switch to the closed state, and storing energy for the open valve part. Regarding the opening and closing control of the drain channel 110 by the movable component 200, the movable component 200 can control the opening and closing of the drain channel 110 within the valve body 100, achieving switching between a closed state and a draining state. Alternatively, the movable component 200 can control the opening and closing of the drain channel 110 at the opening on the exterior of the valve body 100, achieving switching between a closed state and a draining state. As for the application environment of the leak valve, it can be the battery packs of various devices, such as vehicles, lawnmowers, and robots. In this technical solution, vehicles will be used as an example.

[0042] In one embodiment, referring to Figures 1 to 3, the drive mechanism is equipped with a magnetic coupling mechanism 300, including a first coupling portion 310 fixed to the valve body 100 and a second coupling portion 320 fixed to the movable member 200. At least one of the first coupling portion 310 and the second coupling portion 320 is an electromagnet. When the electromagnet is energized, the magnetic force of the first coupling portion 310 and the second coupling portion 320 drives the movable member 200 to switch to a closed state or a draining state. It can be understood that the magnetic coupling mechanism 300 controls the movable member 200 in a non-contact manner, and the wear experienced by the movable member 200 during the switching between the closed state and the draining state is mitigated by the magnetic coupling mechanism 300. Thus, by utilizing the magnetic coupling between the first coupling part 310 and the second coupling part 320, the movable part 200 is driven to move relative to the valve body 100 along its direction of movement, so that the movable part 200 can switch to the closed state of blocking the drain channel 110 or the draining state of opening the drain channel 110, ensuring the accuracy of the opening and closing control of the leakage valve or the sealing performance in the closed state. In some embodiments, energizing the electromagnet can generate a magnetic force between the first coupling part 310 and the second coupling part 320, thereby driving the movable member 200 to switch to the draining state, thus actively opening the draining channel 110. Alternatively, energizing the electromagnet can maintain the movable member 200 in the draining state, with the first coupling part 310 and the second coupling part 320 controlling it to remain in the draining state. Another option is to supply a reverse current to the electromagnet, generating a reverse magnetic force between the first coupling part 310 and the second coupling part 320, thereby causing the movable member 200 to switch to the closed state. Or, de-energizing the electromagnet can cause the drive mechanism (excluding the magnetic coupling mechanism 300) to switch the movable member 200 to the closed state. Of course, in other embodiments, the drive mechanism can also be configured as a motor or cylinder, using mechanical contact to drive the movable member 200 to switch to the closed or draining state.

[0043] It should be noted that in the magnetic coupling mechanism 300, one of the first coupling part 310 and the second coupling part 320 can be located inside the valve body 100 and the other outside the valve body 100, or both can be located inside the valve body 100. The first coupling part 310 can be configured as an electromagnet, the second coupling part 320 can be configured as an electromagnet, or both the first coupling part 310 and the second coupling part 320 can be configured as electromagnets. Without loss of generality, the first coupling part 310 and the second coupling part 320 are opposite each other in the direction of movement of the movable member 200, so that the electromagnetic force generated by the magnetic coupling mechanism 300 can cause the movable member 200 to move stably. Furthermore, the electromagnet typically generates magnetic force in the form of a coil, and the coil is wound according to the direction of movement of the movable member 200.

[0044] In one embodiment, referring to Figures 2 and 3, the first coupling part 310 is configured as an electromagnet, and the second coupling part 320 is configured as a ferromagnet. It can be understood that the first coupling part 310 is fixed to the valve body 100, and the second coupling part 320 is fixed to the movable member 200. Under the magnetic force of the first coupling part 310 and the second coupling part 320, the second coupling part 320 moves together with the movable member 200 along the direction of movement, thereby switching the movable member 200 to a draining state or maintaining it in the draining state. Thus, configuring the first coupling part 310, which remains stable during magnetic coupling, as an electromagnet avoids movement of the electromagnet, reduces the difficulty of conducting electricity to the electromagnet, and ensures the operational stability and reliability of the magnetic coupling mechanism 300. Furthermore, the ferromagnet has good magnetic conductivity and magnetization effects. After the electromagnet is energized and generates a magnetic field, the ferromagnet can move closer to the electromagnet, thereby driving the movable member 200 to switch to a draining state or maintain it in the draining state, thus ensuring the stability of the magnetic coupling mechanism 300 in driving the movable member 200. Of course, in other embodiments, the second coupling part 320 may be configured as an electromagnet and the first coupling part 310 may be configured as a ferromagnet, or both the first coupling part 310 and the second coupling part 320 may be configured as electromagnets, or the second coupling part 320 may be configured as a permanent magnet. The magnetic poles on the opposite side of the electromagnet may be the same, so that the moving part 200 is moved by repulsion, or they may be different, so that the moving part 200 is moved by attraction.

[0045] In one embodiment, referring to Figures 2 and 3, a magnetic conductor 330 is provided on the opposite side of the first coupling portion 310 and the second coupling portion 320 of the electromagnet. The magnetic conductor 330 on the electromagnet can guide the magnetic flux generated by the electromagnet toward the other coupling portion, thereby enhancing the magnetic force between the first coupling portion 310 and the second coupling portion 320, and thus improving the stability and reliability of the magnetic coupling mechanism 300 in moving the movable member 200 to the draining state or the closed state. On the opposite side of the first coupling portion 310 and the second coupling portion 320, a magnetic conductor 330 is provided on the side of the electromagnet facing the other. The magnetic conductor 330 guides the magnetic flux of the corresponding coupling portion to flow toward the other, enhancing the magnetic force between the first coupling portion 310 and the second coupling portion 320, thereby improving the reliability of the magnetic coupling mechanism 300 in moving the movable member 200 to the draining state or the closed state, or maintaining it in the draining state. The magnetic conductor is at least partially provided on the side of the electromagnet facing the other coupling portion. Here, the magnetic conductor can be made of iron or a material with low magnetic resistance, such as nickel. Of course, in other embodiments, an iron core can also be provided on the electromagnet to enhance the magnetic force generated by the electromagnet.

[0046] Regarding the relative positions of the first coupling part 310 and the second coupling part 320, in one embodiment, referring to Figures 2 and 3, the movable member 200 passes through the first coupling part 310, with one end used to block the drain channel 110, and the other end provided with the second coupling part 320. The first coupling part 310 and the second coupling part 320 are coupled by magnetic attraction. It can be understood that the first coupling part 310 generates an attractive magnetic force with the second coupling part 320 on the movement path of the movable member 200, resulting in the first coupling part 310 being arranged around the outer periphery of the movable member 200. This allows for a more compact structural layout of the valve body 100, saving space and helping to reduce the volume of the leaking valve. Furthermore, the electromagnet is magnetically attracted to the second coupling part 320 located at one end of the movable member 200, while the other end of the movable member 200 opens and closes the drainage channel 110. This results in the movable member 200 being subjected to forces at both ends, with the electromagnet positioned at or near the middle of the movable member 200. This allows for balanced forces at both ends of the movable member 200, ensuring the stability of the movable member 200's movement along its direction of motion and thus improving the stability of the opening and closing of the leakage valve. Additionally, since the first coupling part 310 is configured as an electromagnet, it is located along the movement path of the movable member 200. The magnetic force generated by the electromagnet not only acts effectively on the second coupling part 320 but also directly on the movable member 200, enhancing the stability of actively guiding the movable member 200's movement or maintaining it in a drainage state. Of course, in other embodiments, the first coupling portion 310 may also be disposed outside the movement path of the movable member 200 and opposite to the second coupling portion 320 along the movement direction of the movable member 200; the second coupling portion 320 may also be disposed in the middle of the movable member 200 in its movement direction, in which case the first coupling portion 310 may be partially penetrated by the movable member 200, presenting the portion of the movable member 200 blocking the drainage channel 110, the second coupling portion 320, and the first coupling portion 310 arranged in sequence. The first coupling portion 310 and the second coupling portion 320 may interact through repulsive forces.

[0047] In one embodiment, when it is necessary to close the leakage valve, referring to Figures 2, 4 and 5, the drive mechanism is also equipped with an elastic reset member 140. The elastic reset member 140 extends along the movement direction of the movable member 200 and its two ends are respectively connected to the valve body 100 and the movable member 200. After the electromagnet is energized, the magnetic coupling mechanism 300 drives the movable member 200 to switch to the drainage state. After the electromagnet is de-energized, the elastic reset member 140 causes the movable member 200 to switch to the closed state. During the energization of the electromagnet, the magnetic coupling mechanism 300 exerts a force on the movable part 200 to switch to or maintain the draining state. The elastic reset member 140 is in a state of increased elastic potential energy. After the electromagnet is de-energized, the electromagnetic force of the magnetic coupling mechanism 300 disappears, and the elastic reset member 140 releases its own elastic potential energy, causing the movable part 200 to return to the closed state and re-seal the draining channel 110. At this time, the elastic reset member 140 can retain some elastic potential energy to maintain the stability of the movable part 200 in the closed state, or it can be in a natural state, where the movable part 200 is engaged in the draining channel 110 to ensure the sealing of the leaking valve. Thus, the movable part 200 automatically resets to the closed state under the action of the elastic reset member 140, improving the closing efficiency of the leaking valve, simplifying the connection complexity between the magnetic coupling mechanism 300 and the movable part 200, and avoiding interference from the magnetic coupling mechanism 300 in the way the movable part 200 passively switches to the draining state. The elastic reset mechanism can be configured as a compression spring or a tension spring, depending on its location. Alternatively, in other embodiments, a reset motor can be installed on the valve body 100. When the movable part 200 is in the draining state and needs to be switched back to the closed state, the reset motor drives the movable part 200 to move to the closed state, causing the movable part 200 to engage in the draining channel 110.

[0048] Specifically, in this embodiment, please refer to Figures 2, 4 and 5. The movable member 200 passes through the first coupling part 310 and has a second coupling part 320 at its end. The elastic reset member 140 is sleeved on the movable member 200 and sandwiched between the second coupling part 320 and the valve body 100. The first coupling part 310 is spaced apart on the outer periphery of the elastic reset member 140. The elastic reset member 140 is configured as a compression spring, which, together with the movable member 200, passes through the first coupling part 310. The first coupling part 310 is spaced apart on the outer periphery of the elastic reset member 140, so that both the elastic reset member 140 and the first coupling part 310 are on the movement path of the movable member 200. The two ends of the elastic reset member 140 in its extension direction abut against the second coupling part 320 and the valve body 100 respectively, so as to be sandwiched between the second coupling part 320 and the valve body 100. During the process of the first coupling part 310 and the second coupling part 320 generating magnetic force to cause the movable member 200 to move to the liquid discharge state, the second coupling part 320 moves closer to the first coupling part 310, thereby compressing the elastic reset member 140. The elastic reset member 140 is in an elastic contraction state. After the electromagnet is de-energized, the magnetic force between the first coupling part 310 and the second coupling part 320 disappears, and the elastic reset member 140 releases its elastic force to cause the second coupling part 320 to move away from the first coupling part 310, thereby pushing the movable member 200 to reset to the closed state. Thus, by sleeved on the movable member 200 and positioned between the second coupling portion 320 and the valve body 100, and also between the first coupling portion 310 and the guide rod 210 of the movable member 200, the compactness of the leakage valve can be improved. Furthermore, the elastic force of the elastic reset member 140 on the movable member 200 is parallel to the direction of movement of the movable member 200, ensuring the stability of the movable member 200 when switching to the closed state. Alternatively, in other embodiments, the elastic reset member 140 can be configured as a tension spring, positioned in front of the movable member 200 in the direction of switching to the closed state, to reset the movable member 200 to the closed state by pulling it. In this case, the first coupling portion 310 can be positioned in the same location as the elastic reset member 140, acting on the second coupling portion 320 with magnetic repulsion, or it can be positioned on the outer periphery of the movable member 200, acting on the second coupling portion 320 with magnetic attraction, thereby driving the movable member 200 to switch to the drainage state or maintain it in the drainage state.

[0049] Regarding the structure of the leakage valve, in one embodiment, please refer to Figures 2, 4 and 5. The valve body 100 is further provided with a receiving cavity 120 and a drain port 111. The receiving cavity 120 and the drain channel 110 are independently connected to the drain port 111. The movable component 200 includes a guide rod 210 and a cover 220. The driving mechanism is located in the receiving cavity 120 and acts on the guide rod 210. The cover 220 is movably disposed in the drain port 111. The guide rod 210 is connected to the cover 220 from the receiving cavity 120. It is understood that the guide rod 210 passes through the channel connecting the accommodating cavity 120 to the drain port 111 and maintains a suitable dimensional relationship with the channel. In this way, the drain channel 110 for draining accumulated liquid can be effectively isolated from the drive mechanism acting on the moving part 200, avoiding liquid interference with the operation of the drive mechanism, especially the conductive parts of the drive mechanism. The direction in which the liquid flows out of the drain port 111 in the drain channel 110 is the same as or close to the direction in which the guide rod 210 pushes the cover 220 to open the drain port 111, thereby preventing liquid from entering the accommodating cavity 120 and interfering with the operation of the drive mechanism. Meanwhile, the liquid level guide rod 210 at the connection position between the accommodating cavity 120 and the drain port 111 provides guidance, ensuring the stability of the cover 220 during the opening and closing of the drain port 111. Furthermore, the second coupling part 320 is subjected to the magnetic force of the first coupling part 310 within the accommodating cavity 120, and the cover 220 opens and closes the drain port 111 outside the accommodating cavity 120. This results in force being applied to both ends of the guide rod 210, and the middle of the guide rod 210 receiving support at the connection position between the accommodating cavity 120 and the drain port 111. Therefore, when the driving mechanism acts on the movable part 200, the movable part 200 exhibits good stability. Of course, in other embodiments, the movable part 200 can also be disposed on the drain channel 110, with the driving mechanism acting on the movable part 200 within the drain channel 110.

[0050] Regarding the source of the signal for the drive mechanism, in one embodiment, referring to Figures 1, 4, and 5, a liquid level detection element 130 and a liquid level tank 150 are also provided outside the valve body 100. The liquid level detection element 130 is used to detect the liquid level in the liquid level tank 150 and can output a liquid level signal to the control module. It can be understood that the liquid level detection element 130 is communicatively connected to the control module. After outputting the liquid level signal to the control module, the control module outputs a control signal to the drive mechanism according to the liquid level signal, thereby realizing the active opening and closing of the leakage valve. Without loss of generality, the drain channel 110 has a liquid outlet 112 on the side of the valve body 100 located inside the battery pack. The liquid outlet 112 and the liquid level detection element 130 are on the same horizontal plane. When liquid flows through the liquid outlet 112 into the drain channel 110, the liquid level detection element 130 can also detect the presence of liquid. The leakage valve is located at a low position within the battery pack. When liquid accumulates in the battery pack, it quickly gathers at the valve's location. A liquid level detection element 130 is installed on the valve body 100. In the initial stage of liquid accumulation, the detection element 130 quickly outputs a liquid level signal to the control module. The control module then outputs a valve-opening signal to the drive mechanism. When the drive mechanism is equipped with a magnetic coupling mechanism 300, the control module outputs a valve-opening signal to the electromagnet, causing the drive mechanism to switch the movable part 200 to the drainage state. This ensures that the liquid in the battery pack is drained after a small amount of accumulation, reducing the possibility of liquid accumulation affecting battery pack operation. Simultaneously, once the liquid level detection element 130 no longer detects a liquid level, the control module outputs a valve-closing signal to the drive mechanism. The drive mechanism then switches the movable part 200 to the closed state, ensuring that the leakage valve adheres to the battery pack wall promptly after draining the liquid, reducing the time the battery pack is exposed to the outside environment and ensuring the stability and reliability of battery pack operation. Thus, by setting a liquid level detection element 130 on the valve body 100, the leakage valve can be opened and closed efficiently and accurately to complete the drainage process. In this embodiment, the liquid level detection element 130 is configured as two potential contacts. When liquid flows to the valve body 100, the two potential contacts will be at the same potential, thereby sending a liquid level signal to the control module. Of course, in other embodiments, liquid detection elements can also be set at common locations where leakage occurs within the battery pack, either for pre-emptive detection or to verify leakage conditions.

[0051] In another embodiment, referring to Figure 1, the drive mechanism is provided with a first connection end (not shown) and a second connection end (not shown). The first connection end is used to electrically connect to the battery of the battery pack, and the control module is configured as a battery management system. The second connection end is used to electrically connect to the battery management system. In this embodiment, the drive mechanism is configured with a magnetic coupling mechanism 300, and the movable part 200 is switched between a closed state and a draining state by an electromagnet. It can be seen that the first and second connection ends are set on the electromagnet to supply power to the electromagnet. In this way, the electromagnet is electrically connected to the battery of the battery pack through the first connection end, ensuring the stability of the operation of the magnetic coupling mechanism 300. After the battery management system receives a signal that there is liquid accumulation in the battery pack, it determines that there is liquid accumulation in the battery pack that needs to be drained. Then, it sends a control command to the electromagnet through the second connection end, so that the magnetic coupling mechanism 300 drives the movable part 200 to open the draining channel 110, complete the valve opening, and drain the liquid in the battery pack. Correspondingly, when the battery management system receives a notification that the battery pack has been drained of liquid, it determines that the internal environment of the battery pack has stabilized. It then sends a control command to the electromagnet via the second connection terminal, causing the magnetic coupling mechanism 300 to control the movable part 200 to close the drain channel 110, thus completing the valve closure. This maximizes the drainage of liquid and simplifies the control logic by utilizing the control chain resources of the battery management system. Of course, in other embodiments, the first connection terminal can also be connected to other power sources in the vehicle instead of the battery pack's battery, and the second connection terminal can also be connected to other control systems in the vehicle, such as the vehicle infotainment system, instead of directly connecting to the battery management system.

[0052] This utility model also proposes a battery pack including a leakage valve. The specific structure of the leakage valve is as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The battery pack can be configured as a power battery for various devices such as vehicles, robots, and lawnmowers. The leakage valve is installed on the side wall of the battery pack and can communicate with the inside of the battery pack.

[0053] This utility model also proposes a vehicle that includes a battery pack. The specific structure of the battery pack is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0054] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A leakage valve, characterized in that, include: The valve body is provided with a drain channel; The valve includes a movable component movably disposed in the drain channel to have a closed state that blocks the drain channel and a draining state that opens the drain channel; the leak valve has a drive mechanism electrically connected to the control module and capable of driving the movable component to switch between the closed state and the draining state.

2. The leakage valve as described in claim 1, characterized in that, The drive mechanism is equipped with a magnetic coupling mechanism, including a first coupling part fixed to the valve body and a second coupling part fixed to the movable part. At least one of the first coupling part and the second coupling part is an electromagnet. When the electromagnet is energized, the magnetic force of the first coupling part and the second coupling part drives the movable part to switch to the closed state or the draining state.

3. The leakage valve as described in claim 2, characterized in that, The movable part passes through the first coupling part, and one end is used to block the drainage channel, while the other end is provided with the second coupling part. The first coupling part and the second coupling part are coupled by magnetic attraction.

4. The leakage valve as described in claim 2, characterized in that, The first coupling portion is configured as the electromagnet, and the second coupling portion is configured as a ferromagnet; and / or, on the opposite side of the first coupling portion and the second coupling portion, the electromagnet is provided with a magnetic conductor.

5. The leakage valve as described in claim 2, characterized in that, The drive mechanism is also equipped with an elastic reset member, which extends along the movement direction of the movable member and is connected at both ends to the valve body and the movable member, respectively. After the electromagnet is energized, the magnetic coupling mechanism drives the movable member to switch to the discharge state. After the electromagnet is de-energized, the elastic reset member causes the movable member to switch to the closed state.

6. The leakage valve as described in claim 5, characterized in that, The movable part passes through the first coupling part and has a second coupling part at its end. The elastic reset part is sleeved on the movable part and sandwiched between the second coupling part and the valve body. The first coupling part is spaced apart on the outer periphery of the elastic reset part.

7. The leakage valve as described in claim 1, characterized in that, The valve body is also provided with a receiving cavity and a drain port. The receiving cavity and the drain channel are independently connected to the drain port. The movable part includes a guide rod and a cover. The driving mechanism is located in the receiving cavity and acts on the guide rod. The cover is movably disposed in the drain port. The guide rod is connected to the cover from the receiving cavity.

8. The leakage valve as described in any one of claims 1 to 7, characterized in that, The drive mechanism is provided with a first connection end and a second connection end. The first connection end is used to electrically connect to the battery of the battery pack. The control module is configured as a battery management system. The second connection end is used to electrically connect to the battery management system. And / or, the valve body is also provided with a liquid level detection element and a liquid level tank. The liquid level detection element is used to detect the liquid level in the liquid level tank and can output a liquid level signal to the control module.

9. A battery pack, characterized in that, Including the leak valve as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, Includes the battery pack as described in claim 9.

Images