Liquid leakage detection device, high-voltage box and energy storage system

Abstract

The utility model provides a liquid leakage detection device, a high-voltage box and an energy storage system, the liquid leakage detection device is used for the high-voltage box, the high-voltage box comprises a module device and a cooling pipeline, the cooling pipeline contains cooling liquid, the cooling liquid is used for heat exchange with the module device, and the liquid leakage detection device comprises a sleeve sleeved on the outer side of the cooling pipeline; the liquid leakage detection piece is arranged in the sleeve and located between the sleeve and the cooling pipeline; and the switch piece is electrically connected with the liquid leakage detection piece, and when the liquid leakage detection piece detects that the cooling pipeline leaks liquid, the switch piece is switched on or switched off. When the cooling pipeline leaks liquid, as the cooling pipeline is wrapped by the sleeve, leaked cooling liquid cannot be splashed outwards and can only be gathered in the sleeve, the liquid leakage detection piece can conveniently, timely and rapidly detect the liquid leakage condition, system operation is stopped in time through the switch piece, and the effect of rapid alarm is achieved; the time for positioning the liquid leakage detection fault is shortened, and the speed of terminating the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of high - voltage boxes, and more specifically, to a liquid leakage detection device, a high - voltage box, and an energy storage system. Background Art

[0002] Currently, in a liquid - cooled energy storage system, the virtual impedance of the high - voltage box is cooled by a water - cooling method. In related technologies, liquid leakage detection generally involves directly arranging a liquid leakage wire harness directly below the liquid - cooling pipeline. When the water pipe leaks, a dry - contact signal is triggered, and the signal is fed back through an EMMU (Energy Management and Monitoring Unit). Then, after a tripping signal is sent by the BCMS (Battery Cell Management System), the system operation is terminated. The positioning of the fault takes a long time, resulting in poor overall reliability of the system. Summary of the Utility Model

[0003] Embodiments of the utility model aim to solve at least one of the technical problems existing in the prior art.

[0004] To this end, a first aspect of the embodiments of the utility model provides a liquid leakage detection device.

[0005] A second aspect of the embodiments of the utility model provides a high - voltage box.

[0006] A third aspect of the embodiments of the utility model provides an energy storage system.

[0007] In view of this, according to the first aspect of the embodiments of the utility model, a liquid leakage detection device is provided. The liquid leakage detection device is used for a high - voltage box. The high - voltage box includes module devices and a cooling pipeline. The cooling pipeline contains a coolant, and the coolant is used for heat exchange with the module devices. The liquid leakage detection device includes: a sleeve, sleeved outside the cooling pipeline; a liquid leakage detection member, arranged inside the sleeve and located between the sleeve and the cooling pipeline; and a switch member, electrically connected to the liquid leakage detection member. When the liquid leakage detection member detects liquid leakage in the cooling pipeline, the switch member closes or opens.

[0008] The liquid leakage detection device provided by the embodiments of the utility model includes a sleeve, a liquid leakage detection member, and a switch member. Specifically, the high - voltage box includes module devices and a cooling pipeline. The cooling pipeline contains a coolant. Optionally, the coolant includes water or other cooling media. The coolant is used for heat exchange with the module devices to dissipate heat from the module devices, ensuring the stable operation of the high - voltage box. Optionally, the module devices include a virtual impedance.

[0009] It is understandable that when there is a liquid leakage in the cooling pipeline, on the one hand, the leaked coolant drips onto other conductive structures of the high-voltage box, which easily causes pollution of the conductive structures, resulting in high-voltage box failures, reducing the service life of the high-voltage box, and further affecting the reliable operation of the entire energy storage system. On the other hand, the coolant leakage will cause a reduction in the coolant in the cooling pipeline, affecting the heat dissipation effect of the module devices and reducing the reliability of the high-voltage box. Therefore, when there is a liquid leakage in the cooling pipeline, it is necessary to detect it in a timely manner and cut off the system operation.

[0010] The sleeve is sleeved on the outside of the cooling pipeline, and the liquid leakage detection component is arranged inside the sleeve and located between the sleeve and the cooling pipeline. That is to say, the sleeve is used to sleeve the liquid leakage detection component together into the cooling pipeline. When there is a liquid leakage in the cooling pipeline, since the cooling pipeline is wrapped by the sleeve, the leaked coolant will not splash out and can only gather inside the sleeve, facilitating the liquid leakage detection component to detect the liquid leakage situation in a timely and rapid manner. Thus, the system operation can be terminated in a timely manner through the switching component, playing a role of rapid alarm, which is beneficial to shortening the time for positioning the liquid leakage detection fault, improving the speed of terminating the system, and enhancing the reliability and safety of the energy storage system.

[0011] Optionally, the switching component includes a dry contact.

[0012] In addition, the liquid leakage detection device provided according to the above technical solution of the present utility model further has the following additional technical features:

[0013] In some technical solutions, optionally, one side of the liquid leakage detection component is in contact with the inner wall of the sleeve, and the other side of the liquid leakage detection component is used to contact the outer wall of the cooling pipeline.

[0014] In this technical solution, it is defined that both sides of the liquid leakage detection component are in contact with the inner wall of the sleeve and the outer wall of the cooling pipeline respectively. That is to say, under the action of the sleeve, the liquid leakage detection component fits on the outer wall of the cooling pipeline. When there is a liquid leakage in the cooling pipeline, it is beneficial to enable the leaked coolant to quickly contact the liquid leakage detection component, so as to improve the response speed of the liquid leakage detection device to liquid leakage detection, achieve the purpose of rapid alarm, shorten the time for positioning the fault, and improve the speed of terminating the system.

[0015] In some technical solutions, optionally, the sleeve includes a flexible pipeline.

[0016] In this technical solution, it is defined that the sleeve includes a flexible pipeline. That is to say, the cooling pipeline and the liquid leakage detection component are wrapped by the flexible pipeline. It is understandable that the cooling pipeline generally has many bending structures. Setting the sleeve as a flexible pipeline enables the flexible pipeline to deform along with the bending of the cooling pipeline during the process of sleeving the cooling pipeline, facilitating the cooperation between the sleeve and the cooling pipeline.

[0017] Optionally, the flexible pipeline includes a soft rubber tube, such as a PE (polyethylene plastic) tube.

[0018] Optionally, the flexible pipeline includes a metal hose. It can be understood that when the metal hose is sleeved outside the cooling pipeline, the metal hose needs to be grounded to ensure the safety of the energy storage system.

[0019] In some technical solutions, optionally, the liquid leakage detection component is located at the bottom of the cooling pipeline.

[0020] In this technical solution, it can be understood that due to the action of gravity, when the cooling pipeline leaks liquid, no matter where the coolant leaks in the cooling pipeline, it generally flows to the bottom, that is, below the cooling pipeline. By setting the liquid leakage detection component at the bottom of the cooling pipeline, it is further convenient for the liquid leakage detection component to detect the liquid leakage situation in a timely and rapid manner, which is beneficial to shortening the time for locating the liquid leakage detection fault and improving the speed of terminating the system.

[0021] In some technical solutions, optionally, the liquid leakage detection device further includes a tripping circuit, and the tripping circuit is electrically connected to the switch component. When the switch component is closed, the tripping circuit is disconnected, or when the switch component is disconnected, the tripping circuit is disconnected.

[0022] In this technical solution, it is defined that the liquid leakage detection device further includes a tripping circuit. Specifically, the tripping circuit is electrically connected to the switch component. Specifically, when the liquid leakage detection component detects that the cooling pipeline leaks liquid, the switch component is closed and the tripping circuit is disconnected, or when the liquid leakage detection component detects that the cooling pipeline leaks liquid, the switch component is disconnected and the tripping circuit is disconnected. It can be specifically set according to actual needs. It can be understood that the tripping circuit is connected to the main circuit of the energy storage system. That is to say, when the tripping circuit is disconnected, the main circuit is disconnected and the system stops running.

[0023] Since the switch component is directly connected to the tripping circuit, that is, the switch component connected to the liquid leakage detection component, directly controls the on and off of the tripping circuit, bypassing the EMMU and BCMS. When the cooling pipeline leaks liquid, the tripping circuit is quickly triggered to trip (disconnect) through the switch component, reducing the control levels of the liquid leakage detection fault. Compared with the related technology where the EMMU and BCMS feedback signals and issue tripping signals before terminating the system operation, it avoids triggering the trip when the cooling pipeline has leaked severely, further improving the speed of terminating the system and achieving the purpose of rapid alarm, enhancing the safety and reliability of the energy storage system.

[0024] In some technical solutions, optionally, the tripping circuit includes a shunt coil and a circuit breaker. Among them, the shunt coil is electrically connected to the switch component. When the switch component is closed, the shunt coil is energized and generates a magnetic field, and the circuit breaker is disconnected under the action of the magnetic field.

[0025] In this technical solution, it is defined that the tripping circuit includes a shunt coil and a circuit breaker. Specifically, the shunt coil is electrically connected to the switching element. When a liquid leakage occurs in the cooling pipeline, the switching element is triggered to close, the shunt coil is energized and generates a magnetic field. The circuit breaker disconnects under the action of the magnetic field. It can be understood that the circuit breaker is connected to the main circuit of the system, that is, when the circuit breaker disconnects, the main circuit is disconnected and the system stops running.

[0026] Optionally, the circuit breaker includes a tripping mechanism. When the shunt coil is energized to generate a magnetic field, it pushes the tripping mechanism to disconnect the circuit breaker, enabling the operator to achieve the functions of remote control and protection of the power system without manually operating the circuit breaker.

[0027] In some technical solutions, optionally, the liquid leakage detection component includes a water immersion detection line.

[0028] In this technical solution, it is defined that the liquid leakage detection component includes a water immersion detection line. It can be understood that the water immersion detection line is a wire harness whose resistance value can change after being immersed in water. Specifically, when the leaked coolant contacts the water immersion detection line, the resistance value of the water immersion detection line changes. When the resistance value reaches the set value, the switching element is triggered to make the switching element close or open.

[0029] According to the second aspect of the present invention, a high-voltage box is provided, which includes the liquid leakage detection device provided in any of the above technical solutions, and thus has all the beneficial technical effects of the liquid leakage detection device, which will not be elaborated here.

[0030] Furthermore, the high-voltage box further includes module devices and a cooling pipeline. Among them, the cooling pipeline is arranged on the module devices, and the cooling pipeline contains a coolant, and the coolant is used for heat exchange with the module devices.

[0031] The high-voltage box provided by the embodiment of the present invention includes module devices, a cooling pipeline and a liquid leakage detection device. Specifically, the cooling pipeline contains a coolant. Optionally, the coolant includes water or other cooling media. The coolant is used for heat exchange with the module devices to dissipate heat from the module devices and ensure the stable operation of the high-voltage box. Optionally, the module devices include virtual impedance.

[0032] It can be understood that when a liquid leakage occurs in the cooling pipeline, on the one hand, the leaked coolant drips onto other conductive structures of the high-voltage box, which easily causes pollution of the conductive structures, resulting in faults of the high-voltage box, reducing the service life of the high-voltage box, and further affecting the reliable operation of the entire energy storage system. On the other hand, the leakage of the coolant will cause a reduction in the coolant in the cooling pipeline, affecting the heat dissipation effect of the module devices and reducing the reliability of the high-voltage box. Therefore, when a liquid leakage occurs in the cooling pipeline, it is necessary to detect it in time and cut off the system operation.

[0033] The sleeve is sleeved on the outside of the cooling pipeline, and the liquid leakage detection part is arranged inside the sleeve and located between the sleeve and the cooling pipeline. That is to say, the sleeve is used to sleeve the liquid leakage detection part together into the cooling pipeline. When the cooling pipeline leaks, since the cooling pipeline is wrapped by the sleeve, the leaked coolant will not splash out but can only gather inside the sleeve, which is convenient for the liquid leakage detection part to detect the liquid leakage situation in a timely and rapid manner. Thus, the system operation can be terminated in a timely manner through the switch part, playing a role of rapid alarm, which is beneficial to shortening the time for locating the liquid leakage detection fault, increasing the speed of terminating the system, and enhancing the reliability and safety of the energy storage system.

[0034] In addition, the high-voltage box provided according to the above technical solution of the present utility model further has the following additional technical features:

[0035] In some technical solutions, optionally, the cooling pipeline includes a liquid inlet pipe and a liquid return pipe, the sleeve is sleeved on at least one of the liquid inlet pipe and the liquid return pipe, and the liquid leakage detection parts correspond to the sleeves one by one.

[0036] In this technical solution, it is defined that the cooling pipeline includes a liquid inlet pipe and a liquid return pipe. Specifically, the coolant circulates inside the liquid inlet pipe and the liquid return pipe. Specifically, the coolant enters the module device from the liquid inlet pipe, undergoes sufficient heat exchange with the module device, and then flows out through the liquid return pipe to achieve efficient heat dissipation of the module device, extend the service life of the module device, and enhance the reliability of the high-voltage box.

[0037] The sleeve is sleeved on the outside of the liquid inlet pipe. Or, the sleeve is sleeved on the outside of the liquid return pipe. Or, sleeves are sleeved on the outsides of both the liquid inlet pipe and the liquid return pipe. It can be specifically set according to actual needs.

[0038] Since the liquid leakage detection parts correspond to the sleeves one by one, that is to say, when the sleeve is sleeved on the outside of the liquid inlet pipe, the liquid leakage detection part is located between the liquid inlet pipe and the sleeve. When the sleeve is sleeved on the outside of the liquid return pipe, the liquid leakage detection part is located between the liquid return pipe and the sleeve. When sleeves are sleeved on the outsides of both the liquid inlet pipe and the liquid return pipe, the number of liquid leakage detection parts is two, one of which is located between the liquid inlet pipe and the sleeve, and the other is located between the liquid return pipe and the sleeve.

[0039] When the liquid inlet pipe and / or the liquid return pipe leaks, since the liquid inlet pipe and / or the liquid return pipe is wrapped by the sleeve, the leaked coolant will not splash out but can only gather inside the sleeve, which is convenient for the liquid leakage detection part to detect the liquid leakage situation in a timely and rapid manner. Thus, the system operation can be terminated in a timely manner through the switch part, playing a role of rapid alarm, which is beneficial to shortening the time for locating the liquid leakage detection fault, increasing the speed of terminating the system, and enhancing the reliability and safety of the energy storage system.

[0040] According to the third aspect of the present utility model, there is provided an energy storage system, including a liquid leakage detection device or a high-voltage box provided by any of the above technical solutions, and thus having all the beneficial technical effects of the liquid leakage detection device or the high-voltage box, which will not be elaborated herein again.

[0041] The additional aspects and advantages of the present utility model will be given in the following description part, some will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0043] Figure 1 FIG. shows a partial structural schematic diagram of a liquid leakage detection device according to an embodiment of the present utility model;

[0044] Figure 2 FIG. shows a circuit schematic diagram of a liquid leakage detection device according to an embodiment of the present utility model;

[0045] Figure 3 FIG. shows a structural schematic diagram of a high-voltage box according to an embodiment of the present utility model.

[0046] Wherein, Figures 1 to 3 The corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0047] 100 liquid leakage detection device, 110 sleeve, 120 liquid leakage detection member, 121 water immersion detection line, 130 switch member, 140 tripping circuit, 141 shunt coil, 142 circuit breaker, 200 high-voltage box, 210 module device, 220 cooling pipeline, 221 liquid inlet pipe, 222 liquid return pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] In order to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0049] Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model may be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0050] The following refers to Figures 1 to 3 to describe the liquid leakage detection device 100, the high-voltage box 200 and the energy storage system provided by some embodiments of the present utility model.

[0051] In an embodiment according to the present application, as Figure 1 , Figure 2 and Figure 3 shown, a liquid leakage detection device 100 is proposed. The liquid leakage detection device 100 is used for a high-voltage box 200. The high-voltage box 200 includes a module device 210 and a cooling pipeline 220. The cooling pipeline 220 contains a coolant, and the coolant is used for heat exchange with the module device 210. The liquid leakage detection device 100 includes: a sleeve 110 sleeved outside the cooling pipeline 220; a liquid leakage detection component 120 disposed in the sleeve 110 and located between the sleeve 110 and the cooling pipeline 220; a switch component 130 electrically connected to the liquid leakage detection component 120. When the liquid leakage detection component 120 detects liquid leakage in the cooling pipeline 220, the switch component 130 closes or opens.

[0052] The liquid leakage detection device 100 provided by the embodiment of the present utility model includes a sleeve 110, a liquid leakage detection component 120 and a switch component 130. Specifically, the high-voltage box 200 includes a module device 210 and a cooling pipeline 220. The cooling pipeline 220 contains a coolant. Optionally, the coolant includes water or other cooling media. The coolant is used for heat exchange with the module device 210 to dissipate heat from the module device 210, ensuring the stable operation of the high-voltage box 200. Optionally, the module device 210 includes a virtual impedance.

[0053] It can be understood that when liquid leakage occurs in the cooling pipeline 220, on the one hand, the leaked coolant drips onto other conductive structures of the high-voltage box 200, which easily causes pollution of the conductive structures, resulting in faults of the high-voltage box 200, reducing the service life of the high-voltage box 200, and further affecting the reliable operation of the entire energy storage system. On the other hand, the leakage of the coolant will cause a reduction in the coolant in the cooling pipeline 220, affecting the heat dissipation effect of the module device 210 and reducing the reliability of the high-voltage box 200. Therefore, when liquid leakage occurs in the cooling pipeline 220, it is necessary to detect it in time and cut off the system operation.

[0054] The sleeve 110 is sleeved outside the cooling pipeline 220, and the liquid leakage detection component 120 is disposed in the sleeve 110 and located between the sleeve 110 and the cooling pipeline 220. That is to say, the sleeve 110 is used to sleeve the liquid leakage detection component 120 into the cooling pipeline 220 together. When liquid leakage occurs in the cooling pipeline 220, since the cooling pipeline 220 is wrapped by the sleeve 110, the leaked coolant will not splash out and can only gather in the sleeve 110, facilitating the liquid leakage detection component 120 to detect the liquid leakage situation in a timely and rapid manner. Thus, the system operation can be terminated in time through the switch component 130, playing a role of rapid alarm, which is beneficial to shortening the time for locating the liquid leakage detection fault, increasing the speed of terminating the system, and enhancing the reliability and safety of the energy storage system.

[0055] Optionally, the switch 130 includes a dry contact.

[0056] In some embodiments, optionally, one side of the liquid leakage detection member 120 is in contact with the inner wall of the sleeve 110, and the other side of the liquid leakage detection member 120 is for contacting the outer wall of the cooling pipeline 220.

[0057] In this embodiment, it is defined that both sides of the liquid leakage detection member 120 are in contact with the inner wall of the sleeve 110 and the outer wall of the cooling pipeline 220 respectively. That is to say, under the action of the sleeve 110, the liquid leakage detection member 120 is attached to the outer wall of the cooling pipeline 220. When the cooling pipeline 220 leaks liquid, it is beneficial to make the leaked coolant quickly contact the liquid leakage detection member 120, so as to improve the response speed of the liquid leakage detection device 100 to liquid leakage detection, achieve the purpose of rapid alarm, shorten the positioning fault time, and improve the speed of terminating the system.

[0058] In some embodiments, optionally, the sleeve 110 includes a flexible pipeline.

[0059] In this embodiment, it is defined that the sleeve 110 includes a flexible pipeline. That is to say, the cooling pipeline 220 and the liquid leakage detection member 120 are wrapped by the flexible pipeline. It can be understood that the cooling pipeline 220 generally has many bending structures. Setting the sleeve 110 as a flexible pipeline enables the flexible pipeline to deform along with the bending of the cooling pipeline 220 during the process of sleeving the cooling pipeline 220, which is convenient for the cooperation between the sleeve 110 and the cooling pipeline 220.

[0060] Optionally, the flexible pipeline includes a soft rubber tube, such as a PE (polyethylene plastic) tube.

[0061] Optionally, the flexible pipeline includes a metal hose. It can be understood that when the metal hose is sleeved outside the cooling pipeline 220, the metal hose needs to be grounded to ensure the safety of the energy storage system.

[0062] In some embodiments, optionally, the liquid leakage detection member 120 is located at the bottom of the cooling pipeline 220.

[0063] In this embodiment, it can be understood that due to the action of gravity, when the cooling pipeline 220 leaks liquid, no matter where the coolant leaks in the cooling pipeline 220, it generally flows to the bottom, that is, below the cooling pipeline 220. By arranging the liquid leakage detection member 120 at the bottom of the cooling pipeline 220, it is further convenient for the liquid leakage detection member 120 to detect the liquid leakage situation in a timely and rapid manner, which is beneficial to shortening the time for positioning the liquid leakage detection fault and improving the speed of terminating the system.

[0064] Such as Figure 2As shown, in some embodiments, optionally, the liquid leakage detection device 100 further includes a trip circuit 140. The trip circuit 140 is electrically connected to the switch 130. When the switch 130 is closed, the trip circuit 140 is disconnected, or when the switch 130 is open, the trip circuit 140 is disconnected.

[0065] In this embodiment, it is defined that the liquid leakage detection device 100 further includes a trip circuit 140. Specifically, the trip circuit 140 is electrically connected to the switch 130. Specifically, when the liquid leakage detection member 120 detects liquid leakage in the cooling pipeline 220, the switch 130 is closed and the trip circuit 140 is disconnected. Or, when the liquid leakage detection member 120 detects liquid leakage in the cooling pipeline 220, the switch 130 is open and the trip circuit 140 is disconnected. It can be specifically set according to actual needs. It can be understood that the trip circuit 140 is connected to the main circuit of the energy storage system. That is to say, when the trip circuit 140 is disconnected, the main circuit is disconnected and the system stops running.

[0066] Since the switch 130 is directly connected to the trip circuit 140, that is, the switch 130 connected to the liquid leakage detection member 120 directly controls the on / off of the trip circuit 140, bypassing the EMMU and BCMS. When liquid leakage occurs in the cooling pipeline 220, the trip circuit 140 is quickly triggered to trip (disconnect) through the switch 130, reducing the control levels of liquid leakage detection faults. Compared with the related art where the EMMU and BCMS feedback signals and send trip signals before terminating the system operation, it avoids triggering the trip when the liquid leakage in the cooling pipeline 220 is already serious, further improving the speed of terminating the system and achieving the purpose of rapid alarm, enhancing the safety and reliability of the energy storage system.

[0067] As Figure 2 shown, in some embodiments, optionally, the trip circuit 140 includes a shunt coil 141 and a circuit breaker 142. Among them, the shunt coil 141 is electrically connected to the switch 130. When the switch 130 is closed, the shunt coil 141 is energized and generates a magnetic field, and the circuit breaker 142 is disconnected under the action of the magnetic field.

[0068] In this embodiment, it is defined that the trip circuit 140 includes a shunt coil 141 and a circuit breaker 142. Specifically, the shunt coil 141 is electrically connected to the switch 130. When liquid leakage occurs in the cooling pipeline 220, the switch 130 is triggered to close, and the shunt coil 141 is energized and generates a magnetic field. The circuit breaker 142 is disconnected under the action of the magnetic field. It can be understood that the circuit breaker 142 is connected to the main circuit of the system. That is to say, when the circuit breaker 142 is disconnected, the main circuit is disconnected and the system terminates operation.

[0069] Optionally, the circuit breaker 142 includes a tripping mechanism. When the shunt trip coil 141 is energized to generate a magnetic field, the tripping mechanism is pushed to disconnect the circuit breaker 142, enabling remote control and protection of the power system without manual operation by the operator.

[0070] As Figure 1 and Figure 3 shown, in some embodiments, optionally, the liquid leakage detection member 120 includes a water immersion detection line 121.

[0071] In this embodiment, it is defined that the liquid leakage detection member 120 includes a water immersion detection line 121. It can be understood that the water immersion detection line 121 is a wire harness whose resistance value can change after being immersed in water. Specifically, when the leaked coolant contacts the water immersion detection line 121, the resistance value of the water immersion detection line 121 changes. When the resistance value reaches a set value, the switch member 130 is triggered to make the switch member 130 close or open.

[0072] According to the second aspect of the present invention, a high-voltage box 200 is provided, which includes the liquid leakage detection device 100 provided in any of the above embodiments, and thus has all the beneficial technical effects of the liquid leakage detection device 100, which will not be elaborated here.

[0073] As Figure 1 and Figure 3 shown, further, the high-voltage box 200 further includes a module device 210 and a cooling pipeline 220. Among them, the cooling pipeline 220 is arranged on the module device 210, and the cooling pipeline 220 contains a coolant, and the coolant is used for heat exchange with the module device 210.

[0074] The high-voltage box 200 provided by the embodiment of the present invention includes a module device 210, a cooling pipeline 220 and a liquid leakage detection device 100. Specifically, the cooling pipeline 220 contains a coolant. Optionally, the coolant includes water or other cooling media. The coolant is used for heat exchange with the module device 210 to dissipate heat from the module device 210 and ensure the stable operation of the high-voltage box 200. Optionally, the module device 210 includes a virtual impedance.

[0075] It can be understood that when the cooling pipeline 220 leaks liquid, on the one hand, the leaked coolant drips onto other conductive structures of the high-voltage box 200, which easily causes pollution of the conductive structures, resulting in faults of the high-voltage box 200, reducing the service life of the high-voltage box 200, and further affecting the reliable operation of the entire energy storage system. On the other hand, the leakage of the coolant will cause a reduction in the coolant in the cooling pipeline 220, affecting the heat dissipation effect of the module device 210 and reducing the reliability of the high-voltage box 200. Therefore, when the cooling pipeline 220 leaks liquid, it needs to be detected in time and the system operation needs to be cut off.

[0076] The sleeve 110 is sleeved on the outside of the cooling pipeline 220, and the leakage detection component 120 is arranged in the sleeve 110 and is located between the sleeve 110 and the cooling pipeline 220. That is to say, the sleeve 110 is used to insert the leakage detection component 120 into the cooling pipeline 220. When the cooling pipeline 220 leaks, since the cooling pipeline 220 is wrapped by the sleeve 110, the leaked coolant will not splash out and can only gather in the sleeve 110, which makes it easy for the leakage detection component 120 to detect the leakage in a timely and rapid manner, thereby terminating the system operation in time through the switch component 130, playing a role of rapid alarm, which is conducive to shortening the time of locating the leakage detection fault, increasing the speed of terminating the system, and improving the reliability and safety of the energy storage system.

[0077] like Figure 3 As shown, in some embodiments, optionally, the cooling pipeline 220 includes a liquid inlet pipe 221 and a liquid return pipe 222, the sleeve 110 is sleeved on at least one of the liquid inlet pipe 221 and the liquid return pipe 222, and the leakage detection component 120 corresponds to the sleeve 110 one by one.

[0078] In this embodiment, the cooling circuit 220 includes a liquid inlet pipe 221 and a liquid return pipe 222. Specifically, the coolant circulates within the liquid inlet pipe 221 and the liquid return pipe 222. Specifically, the coolant enters the module device 210 through the liquid inlet pipe 221, undergoes sufficient heat exchange with the module device 210, and then flows out through the liquid return pipe 222. This effectively dissipates heat from the module device 210, extends the service life of the module device 210, and improves the reliability of the high-voltage box 200.

[0079] The sleeve 110 is sleeved on the outside of the liquid inlet pipe 221. Alternatively, the sleeve 110 is sleeved on the outside of the liquid return pipe 222. Alternatively, the outsides of the liquid inlet pipe 221 and the liquid return pipe 222 are both sleeved with sleeves 110. The specific arrangement can be made according to actual needs.

[0080] Since the leakage detection member 120 corresponds to the sleeve 110 one-to-one, that is, when the sleeve 110 is sleeved on the outside of the liquid inlet pipe 221, the leakage detection member 120 is located between the liquid inlet pipe 221 and the sleeve 110. When the sleeve 110 is sleeved on the outside of the liquid return pipe 222, the leakage detection member 120 is located between the liquid return pipe 222 and the sleeve 110. When the sleeve 110 is sleeved on the outside of both the liquid inlet pipe 221 and the liquid return pipe 222, there are two leakage detection members 120, one of which is located between the liquid inlet pipe 221 and the sleeve 110, and the other is located between the liquid return pipe 222 and the sleeve 110.

[0081] When the liquid inlet pipe 221 and / or the liquid return pipe 222 leak, since the liquid inlet pipe 221 and / or the liquid return pipe 222 are wrapped by the sleeve 110, the leaked coolant will not splash outwards, but can only accumulate within the sleeve 110, facilitating the leakage detection member 120 to detect the leakage situation in a timely and rapid manner. Thus, the system operation can be terminated in a timely manner through the switching member 130, playing a role in rapid alarm, which is conducive to shortening the time for positioning the leakage detection fault, increasing the speed of terminating the system, and enhancing the reliability and safety of the energy storage system.

[0082] According to the third aspect of the present utility model, an energy storage system is provided, including the leakage detection device 100 or the high-voltage box 200 provided in any of the above embodiments. Therefore, it has all the beneficial technical effects of the leakage detection device 100 or the high-voltage box 200, which will not be elaborated herein.

[0083] In the description of this specification, terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0084] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0085] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A liquid leakage detection device, characterized in that: The liquid leakage detection device is used for a high-voltage box, the high-voltage box includes module devices and a cooling pipeline, the cooling pipeline contains a coolant, and the coolant is used for heat exchange with the module devices. The liquid leakage detection device includes: A sleeve, sleeved outside the cooling pipeline; A liquid leakage detection component, arranged inside the sleeve and located between the sleeve and the cooling pipeline; A switch component, electrically connected to the liquid leakage detection component. When the liquid leakage detection component detects liquid leakage in the cooling pipeline, the switch component closes or opens.

2. The liquid leakage detection device according to claim 1, characterized in that, One side of the liquid leakage detection component is in contact with the inner wall of the sleeve, and the other side of the liquid leakage detection component is used to contact the outer wall of the cooling pipeline.

3. The liquid leakage detection device according to claim 1 or 2, characterized in that: The sleeve includes a flexible pipeline.

4. The liquid leakage detection device according to claim 1 or 2, characterized in that, The liquid leakage detection component is located at the bottom of the cooling pipeline.

5. The liquid leakage detection device according to claim 1 or 2, characterized in that: It further includes: A trip circuit, electrically connected to the switch component. When the switch component closes, the trip circuit opens, or when the switch component opens, the trip circuit opens.

6. The liquid leakage detection device according to claim 5, characterized in that, The trip circuit includes: A shunt coil, electrically connected to the switch component. When the switch component closes, the shunt coil is energized and generates a magnetic field; A circuit breaker, which opens under the action of the magnetic field.

7. The liquid leakage detection device according to claim 1 or 2, characterized in that, The liquid leakage detection component includes a water immersion detection wire.

8. A high voltage box, characterized in that: It includes: The liquid leakage detection device according to any one of claims 1 to 7; Module devices; A cooling pipeline, arranged on the module devices. The cooling pipeline contains a coolant, and the coolant is used for heat exchange with the module devices.

9. The high voltage box according to claim 8, characterized in that The cooling pipeline includes an inlet pipe and a return pipe. The sleeve is sleeved on at least one of the inlet pipe and the return pipe, and the liquid leakage detection components correspond to the sleeves one by one.

10. An energy storage system, characterized in that, It includes: The liquid leakage detection device according to any one of claims 1 to 7; Or The high-voltage box according to claim 8 or 9.

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