A leakage monitoring system and a leakage monitoring method for an energy storage device

Abstract

The application relates to a liquid leakage monitoring system and a liquid leakage monitoring method for an energy storage device. A bottom side of the energy storage device is provided with a flow collection groove for collecting liquid leakage from the energy storage device. The liquid leakage monitoring system comprises a sensing unit, the sensing unit comprising at least one sensor, the sensing unit being arranged at the bottom of the flow collection groove and used for collecting liquid leakage parameters associated with the liquid leakage; and a monitoring and alarming unit electrically connected with the sensing unit, the monitoring and alarming unit being used for receiving the liquid leakage parameters and judging whether to alarm according to the liquid leakage parameters. The application can solve the problem of liquid leakage monitoring of a liquid cooling system during unattended operation, reduce the safety hazards caused by liquid leakage, is easy to implement, and has strong executability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a liquid leakage monitoring system and method for an energy storage device. BACKGROUND

[0002] For the liquid cooling energy storage thermal management system and the liquid cooling and air cooling mixed energy storage thermal management system, the product function and the long service life are usually promoted based on the requirements. However, there are multiple energy storage battery packs with liquid cooling pipes in the internal liquid cooling energy storage device, and the internal liquid cooling energy storage device is basically filled with antifreeze (usually 50% ethylene glycol and 50% water mixture). The characteristics of the antifreeze determine that the liquid cooling system needs to be maintained regularly every 3-5 years to avoid safety hazards and even fires caused by pipe corrosion, liquid leakage, system short circuit and other phenomena.

[0003] In the related art, some liquid cooling system battery packs on the market are provided with liquid leakage monitors to monitor the liquid leakage in the battery pack. However, the monitoring range of the liquid leakage monitor is limited. If the liquid cooling pipe of the energy storage device is damaged or leaks during normal use, the liquid leakage may not be detected, which may still cause serious safety hazards and accidents. SUMMARY

[0004] Therefore, the present application provides a liquid leakage monitoring system and method for an energy storage device, which can solve the problem of liquid leakage monitoring of the liquid cooling system during unattended operation, reduce safety hazards caused by liquid leakage, and is easy to implement and has strong executability.

[0005] In a first aspect, an embodiment of the present application provides a liquid leakage monitoring system for an energy storage device, wherein a bottom side of the energy storage device is provided with a flow collection groove, and the flow collection groove is used to collect liquid leakage from the energy storage device. The liquid leakage monitoring system comprises: a sensing unit, the sensing unit comprising at least one sensor, the sensing unit being arranged at the bottom of the flow collection groove, and the sensing unit being used to collect liquid leakage parameters associated with the liquid leakage; and a monitoring and alarm unit, the monitoring and alarm unit being electrically connected with the sensing unit, and the monitoring and alarm unit being used to receive the liquid leakage parameters and determine whether to alarm according to the liquid leakage parameters.

[0006] In an embodiment, the flow collection groove is a bent structure, wherein the flow collection groove comprises a first bent surface and a second bent surface, the first bent surface and the second bent surface intersect to form a U-shaped structure, a V-shaped structure, and / or a composite structure combined with a partial U-shaped structure and a partial V-shaped structure.

[0007] In an embodiment, the sensing unit comprises a liquid sensor, the liquid sensor being arranged at the bottom of the flow collection groove, and the liquid sensor being used to detect the liquid content in the flow collection groove.

[0008] In an embodiment, the sensing unit further comprises an insulation resistance detection sensor arranged at the bottom of the busbar groove, and the insulation resistance detection sensor is configured to detect changes in insulation resistance in the busbar groove.

[0009] In an embodiment, the energy storage device comprises a container structure composed of a plurality of battery packs and liquid cooling pipes arranged at the side edges of the plurality of battery packs, and the busbar groove is arranged at the bottom side of the liquid cooling pipes.

[0010] In an embodiment, the monitoring and alarming unit comprises a processing module configured to receive the liquid leakage parameters and process the liquid leakage parameters to generate monitoring information.

[0011] In an embodiment, the monitoring and alarming unit further comprises an alarming module electrically connected to the processing module, and the alarming module is configured to determine whether to issue an alarm based on the monitoring information.

[0012] In an embodiment, the monitoring and alarming unit further comprises a verification unit electrically connected to the processing unit, and the verification unit is configured to verify the monitoring information.

[0013] In an embodiment, the liquid leakage monitoring system is applied to a new energy vehicle, and the new energy vehicle comprises a battery management system, the liquid leakage monitoring system is electrically connected to the battery management system, and the battery management system is configured to aggregate the monitoring information.

[0014] In a second aspect, embodiments of the present application provide a liquid leakage monitoring method for an energy storage device, the method is applied to the liquid leakage monitoring system for the energy storage device, and the method comprises the following steps: arranging a busbar groove at the bottom side of the energy storage device to collect liquid leakage from the energy storage device; arranging a sensing unit at the bottom of the busbar groove, the sensing unit comprising at least one sensor; collecting liquid leakage parameters associated with the liquid leakage by the sensing unit; receiving the liquid leakage parameters by the monitoring and alarming unit, and determining whether to issue an alarm based on the liquid leakage parameters.

[0015] By arranging a busbar groove at the bottom side of the energy storage device to collect liquid leakage from the energy storage device, and arranging at least one sensor at the bottom of the busbar groove to collect liquid leakage parameters associated with the liquid leakage, and then receiving the liquid leakage parameters by the monitoring and alarming unit and determining whether to issue an alarm based on the liquid leakage parameters, the liquid leakage monitoring problem of the liquid cooling system during unattended operation can be solved according to the aspects of the present application, the safety hazard caused by liquid leakage can be reduced, it is easy to implement, and the executability is strong. BRIEF DESCRIPTION OF DRAWINGS

[0016] The technical solutions and other beneficial effects of the present application will be apparent from the following detailed description of the specific embodiments of the present application, taken in conjunction with the accompanying drawings.

[0017] Figure 1 A front view schematic diagram of a leakage monitoring system for an energy storage device is shown.

[0018] Figure 2 A top view schematic diagram of a leakage monitoring system for an energy storage device is shown.

[0019] Figure 3 A schematic diagram of a sensor is shown.

[0020] Figure 4 A structural block diagram of a leakage monitoring system is shown.

[0021] Figure 5 A flow chart of a leakage monitoring method for an energy storage device is shown. DETAILED DESCRIPTION

[0022] The technical solutions and other beneficial effects of the present application will be apparent from the following detailed description of the specific embodiments of the present application, taken in conjunction with the accompanying drawings.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0024] In the description of the present application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, or electrical connection or can communicate with each other; can be direct connection, or indirect connection through intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials. In some examples, methods, means, elements and circuits well known to those skilled in the art are not described in detail in order to highlight the main idea of the present application.

[0026] The present application mainly provides a liquid leakage monitoring system for energy storage device, the liquid leakage monitoring system comprises: a collecting groove, the collecting groove is arranged on the bottom side of the energy storage device, the collecting groove is used for collecting liquid leakage from the energy storage device; a sensing unit, the sensing unit comprises at least one sensor, the sensing unit is arranged at the bottom of the collecting groove, the sensing unit is used for collecting liquid leakage parameters associated with the liquid leakage; a monitoring alarm unit, the monitoring alarm unit is electrically connected with the sensing unit, the monitoring alarm unit is used for receiving the liquid leakage parameters and determining whether to alarm according to the liquid leakage parameters.

[0027] By arranging the collecting groove on the bottom side of the energy storage device to collect liquid leakage from the energy storage device, and arranging at least one sensor at the bottom of the collecting groove to collect liquid leakage parameters associated with the liquid leakage, and then receiving the liquid leakage parameters by the monitoring alarm unit and determining whether to alarm according to the liquid leakage parameters, the present application can solve the problem of liquid leakage monitoring of liquid cooling system during unattended operation, reduce the safety hidden danger caused by liquid leakage, and is easy to implement and has strong executability.

[0028] Figure 1 The front view schematic diagram of the liquid leakage monitoring system for energy storage device of the embodiment of the present application is shown. As shown in FIG. 1, the liquid leakage monitoring system for energy storage device of the embodiment of the present application comprises a collecting groove 1 and a sensing unit 2. Figure 1As shown, the energy storage device includes a container structure composed of a plurality of battery packs 11 and liquid cooling pipes arranged at the side of the plurality of battery packs (not shown) Figure 1 A busbar groove 121 can be arranged at the bottom side of the liquid cooling pipes.

[0029] In an embodiment, referring to Figure 1 , the plurality of battery packs 11 can be arranged in a row-column form, each battery pack 11 can be, for example, a rectangular grid shape, and each grid shape can be a container. The liquid cooling pipes can be arranged at one side of the container structure formed by the plurality of battery packs. For example, the liquid cooling pipes can be arranged at the top side of the container structure formed by the plurality of battery packs, or at the bottom side of the container structure formed by the plurality of battery packs. It can be understood that the relative position relationship between the liquid cooling pipes and the container structure can be arranged as needed, and the present application is not limited.

[0030] Figure 2 A top view schematic diagram of a liquid leakage monitoring system for an energy storage device according to an embodiment of the present application is shown. Referring to Figure 2 , from the perspective of the energy storage device, the plurality of battery packs (PACK) 11 of the energy storage device are arranged regularly to form a container structure. A liquid cooling main machine, a fire extinguishing system, an auxiliary power cabinet energy management system (EMS), etc. can also be arranged at the left side of the container structure. Busbar grooves 121 and 122 can be symmetrically arranged at both sides of the container structure. Further, liquid cooling pipes can be arranged at both sides of the container structure, and the busbar grooves 121 and 122 can be arranged at the bottom side of the corresponding liquid cooling pipes.

[0031] In an embodiment, the busbar groove is arranged at the bottom side of the energy storage device, and the busbar groove is used to collect liquid leakage from the energy storage device. The busbar groove can be a bent structure. For example, the busbar groove can be U-shaped or V-shaped. It should be noted that the shape of the busbar groove can be deformed as needed, for example, the busbar groove can also be arranged in a W shape or other shapes that can collect liquid leakage. It can be understood that the present application does not limit the shape of the busbar groove.

[0032] In an embodiment, the degree of bending of the busbar groove can be pre-set. The busbar groove includes a first bending surface and a second bending surface, and the first bending surface and the second bending surface intersect to form a U-shaped structure, a V-shaped structure, and / or a composite structure combining part of the U-shaped structure and part of the V-shaped structure. For example, in the case of a V-shaped busbar groove, the size of the V-shaped angle can be set as needed. For another example, the busbar groove can also be a mixed structure formed by a U-shaped structure and a V-shaped structure, and the U-shaped structure and the V-shaped structure can be arranged alternately to form the busbar groove.

[0033] In an embodiment, the composite structure of the combination of the partial U-shaped structure and the partial V-shaped structure can be a structure formed by the upper half of the U-shaped structure and the lower half of the V-shaped structure. That is, the internal structure of the entire busbar groove can be mainly in the U-shaped structure when viewed from the short side, and finally end in the V-shaped structure at the lowest point of the long side. By using the composite structure of the combination of the partial U-shaped structure and the partial V-shaped structure, less leakage liquid can quickly pass through the structure during the flow of the liquid, thereby facilitating the collection of the liquid, improving the sensitivity of the leakage liquid monitoring, and better achieving the early warning of the leakage liquid.

[0034] It is worth noting that before the busbar groove is set, the safety hazards under the external pipeline of the battery pack in the container type structure can be investigated first, the size of the available space outside the container type structure is confirmed, and then the busbar groove is set at the bottom side of the container type structure, so as to reduce the influence caused by improper design of the position of the busbar groove or insufficient space estimation.

[0035] In an embodiment, in addition to the container type structure, the busbar groove can also be applied to other similar battery cabinet bodies and electrical control cabinets, etc. For the container type structure, the bottom of the cabinet can also be directly designed into a U-shaped or V-shaped structure for storing the leakage liquid to achieve the purpose of flow collection.

[0036] Figure 3 A schematic diagram of a sensor of an embodiment of the present application is shown. As shown in Figure 3 The leakage liquid monitoring system includes a sensing unit, and the sensing unit includes at least one sensor 131. The sensing unit is arranged at the bottom of the busbar groove, and is used to collect the leakage liquid parameters associated with the leakage liquid.

[0037] The sensor 131 can be arranged in one or multiple. In an embodiment, the sensing unit includes a liquid sensor arranged at the bottom of the busbar groove, and the liquid sensor is used to detect the liquid content in the busbar groove. For example, the liquid sensor can be a glycol sensor. The glycol sensor can be used to detect the content of glycol in the glycol sensor. The monitored liquid can include but is not limited to antifreeze, pure water, silicone oil, and other thermal management liquids. In actual application, the liquid sensor can also be of other types, which are not limited in the present application.

[0038] Please refer to Figure 3In an embodiment, the collecting groove can include a first bending surface 1211 and a second bending surface 1212, the first bending surface and the second bending surface intersecting to form a U-shaped and / or V-shaped structure. The first bending surface 1211 and the second bending surface 1212 can be both straight or both curved. For example, the first bending surface 1211 and the second bending surface 1212 can be both straight, and a plurality of the first bending surfaces 1211 and the second bending surfaces 1212 can be provided, and the first bending surfaces 1211 and the second bending surfaces 1212 can be staggered to form a sawtooth structure composed of a plurality of V-shaped structures, so as to collect the leaked liquid at different positions.

[0039] In an embodiment, the sensing unit further includes an insulation resistance detection sensor, for example, the sensor 131 can be an insulation resistance detection sensor. The insulation resistance detection sensor is arranged at the bottom of the collecting groove, and is used to detect the change of the insulation resistance in the collecting groove.

[0040] It should be noted that in the embodiments of the present application, the liquid sensor and the insulation resistance detection sensor can be independently arranged or cooperatively arranged to collect the leaked liquid parameters. The leaked liquid parameters can include the content of the ethylene glycol collected by the sensor and / or the current insulation resistance in the collecting groove. The parameters collected by different types of sensors can be transmitted to the detection alarm unit for further processing.

[0041] Figure 4 A structural block diagram of the leaked liquid monitoring system according to the embodiments of the present application is shown. Referring to FIG. 1, Figure 4 The leaked liquid monitoring system includes a monitoring alarm unit (i.e., a monitoring alarm system in Figure 4 , which is electrically connected with the sensing unit. The monitoring alarm unit is used to receive the leaked liquid parameters and determine whether to alarm according to the leaked liquid parameters.

[0042] Further, the monitoring alarm unit includes a processing module, which is used to receive the leaked liquid parameters and process the leaked liquid parameters to generate monitoring information. For example, the processing module can be provided with a processor. The processor can be electrically connected with the sensing unit in a wired or wireless manner to receive the leaked liquid parameters collected by the sensing unit. The type of the processor can be set as required, and the present application is not limited thereto.

[0043] The leaked liquid parameters can be analog quantities, and the processor can further perform analog-digital conversion on the leaked liquid parameters, so that the processor can process the digitized leaked liquid parameters to generate monitoring information. The monitoring information can include information such as the content of the ethylene glycol and the liquid height.

[0044] Further, the monitoring and alarming unit further comprises an alarming module, which is electrically connected with the processing module, and is configured to determine whether to send an alarm according to the monitoring information. For example, when the energy storage device has a liquid leakage phenomenon, the ethylene glycol content information collected by the ethylene glycol sensor is uploaded to the processor, and the processor compares the collected current ethylene glycol content information with the preset ethylene glycol content threshold. If the collected current ethylene glycol content information exceeds the preset ethylene glycol content threshold, the alarm module can send a sound alarm or a light alarm to prompt that the ethylene glycol leakage is very serious; if the collected current ethylene glycol content information does not exceed the preset ethylene glycol content threshold, the alarm module can send a sound alarm or a light alarm different from the exceeding case to prompt that the ethylene glycol leakage is not serious. In actual application, in the case that the collected current ethylene glycol content information is zero, the alarm module can also not send any alarm action.

[0045] For another example, when the energy storage device has a liquid leakage phenomenon, the resistance information collected by the insulation resistance detection sensor is uploaded to the processor, and the processor compares the collected current resistance information with the preset resistance threshold. If the collected resistance change amount exceeds the preset resistance threshold, the alarm module can send a sound alarm or a light alarm to prompt that the liquid leakage is very serious; if the collected resistance change amount does not exceed the preset resistance threshold, the alarm module can send a sound alarm or a light alarm different from the exceeding case to prompt that the liquid leakage is not serious. In actual application, in order to further distinguish whether the small resistance change amount is caused by the non-leakage or the full-leakage, the liquid information collected by the liquid sensor can be used for more accurate judgment. Alternatively, the current resistance value instead of the resistance change amount can be used to determine whether there is liquid leakage.

[0046] Further, the monitoring and alarming unit further comprises a verification unit, which is electrically connected with the processing unit, and is configured to verify the monitoring information. Since the data collected by various sensors can be various, the verification unit can be used to verify and check different types of monitoring information to avoid missing detection or misjudgment. In actual application, the verification can be realized by a running verification algorithm. It can be understood that the specific verification algorithm is not limited in the present application.

[0047] In an embodiment, the liquid leakage monitoring system is applied to a new energy vehicle, the new energy vehicle comprises a battery management system, the liquid leakage monitoring system is electrically connected with the battery management system, and the battery management system is configured to collect the monitoring information. For example, Figure 4As shown, in addition to the monitoring alarm system, the new energy vehicle in the embodiment of the present application can also include a battery management system (primary master BMS), a fire extinguishing system, a fire control system, an energy management system (EMS), etc. These systems can be independently arranged with the monitoring alarm system. The monitoring information can also be collected to the battery management system (primary master BMS), the fire extinguishing system, the fire control system, the energy management system (EMS), etc. to realize the alarm function. In addition, the type of the sensor can also be extended to a gas sensor such as an H2 sensor, a CO / CO2 sensor, etc.

[0048] In summary, the embodiment of the present application can reduce the harmfulness of external pipeline leakage to the battery system and reduce the safety hazards and accident risks caused by liquid leakage by monitoring the container system level of the pipeline connected outside the battery pack. Moreover, compared with the existing energy storage device which is basically unattended, the liquid cooling type thermal management system may cause cooling liquid leakage due to defects of the liquid cooling pipeline caused by the quality level of the pipeline itself, pipeline corrosion, pipeline aging, installation scratches, etc., resulting in poor insulation, system short circuit and other safety hazards. The embodiment of the present application also solves the safety problem of the system in use and the safety monitoring and early warning of liquid leakage of the thermal management system in the unattended process. In addition, the sensing unit and the monitoring alarm system of the embodiment of the present application can realize real-time communication, and the monitoring alarm system and other systems are independent of each other, which can realize the safety warning and protection of the container type energy storage device in all directions.

[0049] Figure 5 A flow chart of the liquid leakage monitoring method for the energy storage device according to the embodiment of the present application is shown. As shown in the figure, Figure 5 The embodiment of the present application also provides a liquid leakage monitoring method for an energy storage device. The method is applied to the liquid leakage monitoring system for the energy storage device, and the method comprises the following steps:

[0050] Step S1: A collecting groove is arranged at the bottom side of the energy storage device to collect liquid leakage from the energy storage device;

[0051] Step S2: A sensing unit is arranged at the bottom of the collecting groove, and the sensing unit comprises at least one sensor;

[0052] Step S3: The sensing unit collects liquid leakage parameters associated with the liquid leakage;

[0053] Step S4: The monitoring alarm unit receives the liquid leakage parameters, and determines whether to alarm according to the liquid leakage parameters.

[0054] It should be noted that the specific details of the liquid leakage monitoring method can be referred to the liquid leakage monitoring system for the energy storage device, which will not be described again. It can be understood that the specific application scenarios of the liquid leakage monitoring system for the energy storage device are not limited by the present application.

[0055] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0056] The above describes in detail the liquid leakage monitoring system and the liquid leakage monitoring method for the energy storage device provided by the embodiments of the present application. The principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the technical solutions and the core ideas of the present application. Those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently. The modifications or replacements do not change the essence of the corresponding technical solutions out of the scope of the technical solutions of the embodiments of the present application.

Claims

1. A leak monitoring system for an energy storage device, comprising: The bottom side of the energy storage device is provided with a collecting groove, the energy storage device comprises a container type structure composed of a plurality of battery packs and liquid cooling pipes arranged at the side edges of the plurality of battery packs, and the collecting groove is arranged at the bottom side of the liquid cooling pipes, and the collecting groove is used for collecting liquid leakage from the liquid cooling pipes of the energy storage device; The liquid leakage monitoring system comprises: a sensing unit comprising at least one sensor, the sensing unit being arranged at the bottom of the collecting groove and being used for collecting liquid leakage parameters associated with the liquid leakage; the liquid leakage parameters comprise liquid information and insulation resistance information; a monitoring and alarming unit electrically connected to the sensing unit, the monitoring and alarming unit being used for receiving the liquid leakage parameters and determining whether to alarm according to the liquid leakage parameters; wherein the collected current insulation resistance information is compared with a preset resistance threshold value; if the collected insulation resistance information exceeds the resistance threshold value, a first kind of alarm information is sent through the monitoring and alarming unit; if the collected insulation resistance information does not exceed the preset resistance threshold value, a second kind of alarm information is sent through the monitoring and alarming unit, and the first kind of alarm information is different from the second kind of alarm information; if the collected insulation resistance information does not exceed the resistance threshold value, and according to the liquid content in the collecting groove, it is determined whether the collecting groove is full; according to the liquid information, it is determined whether the current insulation resistance information occurs in the case of no liquid leakage or in the case of liquid leakage fullness; the insulation resistance information comprises an insulation resistance value or a resistance change amount.

2. The leakage monitoring system for an energy storage device according to claim 1, wherein The collecting groove is a bending structure, wherein: the collecting groove comprises a first bending surface and a second bending surface, the first bending surface and the second bending surface intersect to form a U-shaped structure, a V-shaped structure and / or a composite structure combined with part of a U-shaped structure and part of a V-shaped structure.

3. The leakage monitoring system for an energy storage device according to claim 1, wherein The sensing unit comprises a liquid sensor arranged at the bottom of the collecting groove, and the liquid sensor is used for detecting the liquid content in the collecting groove.

4. The leakage monitoring system for an energy storage device according to any one of claims 1 to 3, wherein The sensing unit further comprises an insulation resistance detection sensor arranged at the bottom of the collecting groove, and the insulation resistance detection sensor is used for detecting the change of the insulation resistance in the collecting groove.

5. The leak monitoring system for an energy storage device of claim 1, wherein, The monitoring and alarming unit comprises a processing module, the processing module is used for receiving the liquid leakage parameters and processing the liquid leakage parameters to generate monitoring information.

6. The leakage monitoring system for an energy storage device according to claim 5, wherein The monitoring and alarming unit further comprises an alarm module electrically connected to the processing module, and the alarm module is used for determining whether to send an alarm according to the monitoring information.

7. The leakage monitoring system for an energy storage device according to claim 5, wherein The monitoring and alarming unit further comprises a verification unit electrically connected to the processing module, and the verification unit is used for verifying the monitoring information.

8. The leakage monitoring system for an energy storage device according to any one of claims 5-7, wherein The liquid leakage monitoring system is applied to a new energy vehicle, the new energy vehicle comprises a battery management system, the liquid leakage monitoring system is electrically connected to the battery management system, and the battery management system is used for summarizing the monitoring information.

9. A method for monitoring liquid leakage for an energy storage device, the method comprising: The method is applied to the liquid leakage monitoring system for the energy storage device as claimed in any one of claims 1 to 8, and the method comprises: A collecting groove is arranged on the bottom side of the energy storage device to collect leaked liquid from the energy storage device; A sensing unit is arranged on the bottom of the collecting groove, and the sensing unit comprises at least one sensor; A leaked liquid parameter associated with the leaked liquid is collected by the sensing unit; the leaked liquid parameter comprises liquid information and insulation resistance information; The monitoring and alarming unit receives the leaked liquid parameter and determines whether to alarm according to the leaked liquid parameter; The collected current insulation resistance information is compared with a preset resistance threshold value; If the collected insulation resistance information exceeds the resistance threshold value, the monitoring and alarming unit sends first alarm information; If the collected insulation resistance information does not exceed the preset resistance threshold value, the monitoring and alarming unit sends second alarm information, and the first alarm information is different from the second alarm information; According to the liquid information, it is determined whether the current insulation resistance information occurs in the case of no leakage or in the case of full leakage; The insulation resistance information comprises insulation resistance or resistance change amount.

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