Immersed energy storage battery box, monitoring method thereof, electronic equipment and storage medium

Abstract

The invention discloses an immersed energy storage battery box and a monitoring method thereof, electronic equipment and a storage medium, and relates to the technical field of battery management. The method comprises the following steps: introducing insulating oil into a battery box through an immersed system; the average temperature of the battery module is obtained through a first temperature sensor; when the average temperature is greater than a first preset temperature, the battery management system controls the immersed system to adjust the temperature of the insulating oil, and the battery module is cooled; when the average temperature is greater than a second preset temperature, the battery management system controls the immersed system to adjust the temperature of the insulating oil and controls the refrigerating system to introduce refrigerating gas into the hollow flow channel to cool the battery module; the conductivity of the insulating oil is detected through a built-in sensor, and when the conductivity of the insulating oil exceeds a first preset value, the insulating oil is replaced; the oil leakage state of the battery box is detected through the external sensor, and when the battery box leaks oil, an alarm is given. The method can improve the reliability of the battery box.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management, and in particular to an immersion type energy storage battery box and a monitoring method thereof, an electronic device and a storage medium. Background Art

[0002] With the growth of global energy demand and the popularity of renewable energy, the development of energy storage technology has become particularly important. As an efficient energy storage solution, the working principle of the immersed energy storage battery box is to immerse the battery components in insulating oil to achieve better thermal management and safety performance. However, this design has high requirements for sealing to prevent the overflow of insulating oil and the intrusion of external contaminants. At the same time, since the batteries in the battery box need to be monitored in real time, this design makes the monitoring of the batteries more complicated. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an immersion energy storage battery box and a monitoring method thereof, an electronic device and a storage medium, which can improve the sealing of the battery box and perform real-time monitoring of the batteries in the battery box.

[0004] In a first aspect, a monitoring method for an immersion energy storage battery box according to an embodiment of the present invention is applied to a battery box, wherein a mounting frame is arranged in the battery box, a battery module is arranged in the mounting frame, a hollow flow channel is arranged on the side wall of the mounting frame, the battery module includes a plurality of batteries, each of the batteries is provided with a first temperature sensor, a through hole is opened on the side wall of the battery box, a circuit board is arranged at the through hole, a sealing ring is arranged at the connection between the circuit board and the through hole, an inner plug-in connector and a built-in sensor are arranged on a side of the circuit board facing the inside of the battery box, an outer plug-in connector and an external sensor are arranged on a side of the circuit board facing the outside of the battery box, the first temperature sensor is electrically connected to the inner plug-in connector, the inner plug-in connector is electrically connected to the outer plug-in connector, and the outer plug-in connector is electrically connected to a battery management system; The monitoring method comprises: Introducing insulating oil into the interior of the battery box through an immersion system; The first temperature sensor is used to collect the temperature of each battery to obtain the average temperature of the battery module; When the average temperature is greater than a first preset temperature, the battery management system controls the immersion system to adjust the temperature of the insulating oil to cool the battery module; When the average temperature is greater than a second preset temperature, the battery management system controls the immersion system to adjust the temperature of the insulating oil, and controls the refrigeration system to introduce refrigerant gas into the hollow flow channel to cool the battery module; the second preset temperature is greater than the first preset temperature; detecting the electrical conductivity of the insulating oil by means of the built-in sensor, and replacing the insulating oil when the electrical conductivity of the insulating oil exceeds a first preset value; The oil leakage state of the battery box is detected by the external sensor, and an alarm is issued when oil leakage occurs in the battery box. According to some embodiments of the present invention, the immersion system includes an oil storage tank and a circulation pump, the oil storage tank is provided with a temperature regulating element, the insulating oil is stored in the oil storage tank, the liquid outlet of the oil storage tank is connected to one end of the circulation pump, the other end of the circulation pump is connected to the liquid inlet of the battery box, the liquid outlet of the battery box is communicated with the liquid inlet of the oil storage tank, a first solenoid valve is provided between the liquid outlet of the oil storage tank and one end of the circulation pump, and a second solenoid valve is provided between the liquid outlet of the battery box and the liquid inlet of the oil storage tank; a liquid level sensor is provided in the battery box; When the average temperature is greater than a first preset temperature, the battery management system controls the immersion system to adjust the temperature of the insulating oil to cool the battery module, comprising: When the average temperature is greater than a first preset temperature, the battery management system controls the temperature regulating element to lower the temperature of the insulating oil in the oil storage tank; When the temperature of the insulating oil in the oil storage tank drops to a third preset temperature, the battery management system controls the first solenoid valve and the second solenoid valve to open; the third preset temperature is lower than the first preset temperature; The circulation pump pumps the insulating oil in the oil storage tank into the battery box to replace the insulating oil in the battery box, and controls the insulating oil in the oil storage tank to circulate between the battery box and the oil storage tank to cool the battery module.

[0005] According to some embodiments of the present invention, the immersion system further includes a spare oil storage tank, in which spare insulating oil is stored, the first solenoid valve and the second solenoid valve are both three-way solenoid valves, the first inlet of the first solenoid valve is communicated with the liquid outlet of the oil storage tank, the second inlet of the first solenoid valve is communicated with the liquid outlet of the spare oil storage tank, the outlet of the first solenoid valve is communicated with one end of the circulation pump, the inlet of the second solenoid valve is communicated with the liquid outlet of the battery box, the first outlet of the second solenoid valve is communicated with the liquid inlet of the oil storage tank, and the second outlet of the second solenoid valve is communicated with the liquid inlet of the spare oil storage tank; When the electrical conductivity of the insulating oil exceeds a first preset value, the step of replacing the insulating oil comprises: The battery management system controls the first outlet of the second solenoid valve to open, and after the circulating pump pumps the insulating oil in the battery box into the oil storage tank, the first outlet of the second solenoid valve is closed; The battery management system controls the second inlet of the first solenoid valve to open, and the backup oil storage tank pumps the backup insulating oil into the battery box until the backup insulating oil in the battery box reaches a preset height. According to some embodiments of the present invention, the circuit board is made of epoxy resin material, and the area of ​​the circuit board is larger than the area of ​​the through hole of the battery box, the sealing ring is fixed to the circuit board by welding pins, the sealing ring and the through hole of the battery box have the same geometric center, and the circuit board is fixed to the battery box by screws.

[0006] According to some embodiments of the present invention, the built-in sensor includes a conductivity sensor having a bimetallic strip; the step of detecting the conductivity of the insulating oil by the built-in sensor includes: The battery management system applies a DC voltage excitation between the bimetallic strips of the conductivity sensor and obtains a DC current value; Calculating the resistance value between the bimetallic strips according to the DC voltage and the DC current value; The conductivity is determined according to the resistance value. According to some embodiments of the present invention, the external sensor is a capacitive sensor; The step of detecting the oil leakage state of the battery box by the external sensor comprises: The battery management system applies an AC voltage excitation to the capacitor of the external sensor and obtains an AC current value; Calculating the capacitance value of the external sensor according to the AC voltage and the AC current value; When the capacitance value is greater than a preset threshold, it indicates that the battery box is leaking oil.

[0007] According to some embodiments of the present invention, an isolation chamber is provided at the top of the battery box, the isolation chamber is located above the battery module, a smoke sensor and an openable and closable hatch are provided at the bottom of the isolation chamber, and a flame retardant is provided in the isolation chamber; The monitoring method further comprises: When the smoke sensor detects a smoke signal, the battery management system opens the hatch; The flame retardant in the isolation chamber enters the chamber in the battery box where the battery module is located.

[0008] In a second aspect, according to an immersion energy storage battery box according to an embodiment of the present invention, a mounting frame is arranged in the immersion energy storage battery box, a battery module is arranged in the mounting frame, a hollow flow channel is arranged in the side wall of the mounting frame, the battery module includes a plurality of batteries, each of the batteries is provided with a first temperature sensor, a through hole is opened in one side wall of the immersion energy storage battery box, a circuit board is arranged at the through hole, a sealing ring is arranged at the connection between the circuit board and the through hole, an inner connector and a built-in sensor are arranged on a side of the circuit board facing the inside of the battery box, an outer connector and an external sensor are arranged on a side of the circuit board facing the outside of the immersion energy storage battery box, the first temperature sensor is electrically connected to the inner connector, the inner connector is electrically connected to the outer connector, and the outer connector is electrically connected to a battery management system; the immersion energy storage battery box is used to implement the above-mentioned monitoring method for the immersion energy storage battery box.

[0009] In a third aspect, an electronic device according to an embodiment of the present invention includes: A memory for storing program instructions; The processor is used to call the program instructions stored in the memory and execute the above-mentioned monitoring method of the submerged energy storage battery box according to the obtained program instructions.

[0010] In a fourth aspect, a storage medium according to an embodiment of the present invention is characterized in that the storage medium stores computer executable instructions, and the computer executable instructions are used to enable a computer to execute the above-mentioned monitoring method for the submerged energy storage battery box.

[0011] The submerged energy storage battery box and its monitoring method, electronic device and storage medium according to the embodiments of the present invention have at least the following beneficial effects: the sealing of the battery box is improved by the sealing ring to avoid oil leakage of the battery box; the conductivity of the insulating oil and the oil leakage state of the battery box can be detected by the external sensor and the internal sensor, thereby improving the stability and reliability of the battery box; the conditions in the battery box are monitored in real time by the internal connector and the external connector, so as to achieve temperature management of the battery module and avoid excessive temperature of the battery module in the battery box.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 A flowchart of the steps of a monitoring method for an immersion energy storage battery box according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of an immersion energy storage battery system according to an embodiment of the present invention; Figure 3 It is a structural schematic diagram of the submerged energy storage battery system from another perspective of an embodiment of the present invention. DETAILED DESCRIPTION

[0014] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limitations on the present application. For the step numbers in the following embodiments, they are only provided for the convenience of explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0015] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0016] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0017] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0018] With the growth of global energy demand and the popularity of renewable energy, the development of energy storage technology has become particularly important. As an efficient energy storage solution, the working principle of the immersed energy storage battery box is to immerse the battery components in insulating oil to achieve better thermal management and safety performance. However, this design has high requirements for sealing to prevent the overflow of insulating oil and the intrusion of external contaminants. At the same time, since the batteries in the battery box need to be monitored in real time, this design makes the monitoring of the batteries more complicated.

[0019] To this end, the embodiments of the present invention propose an immersion-type energy storage battery box and a monitoring method thereof, an electronic device and a storage medium. The sealing performance of the battery box is improved by a sealing ring to avoid oil leakage in the battery box. The conductivity of the insulating oil and the oil leakage status of the battery box can be detected by external sensors and internal sensors, thereby improving the stability and reliability of the battery box. The circuit board and the battery management system can be used to monitor the conditions in the battery box in real time, realize temperature management of the battery module, and avoid excessive temperature of the battery module in the battery box.

[0020] On the one hand, the embodiment of the present invention provides a monitoring method for an immersion energy storage battery box, which is applied to a battery box 100, such as Figure 2 and Figure 3 As shown, a mounting frame 200 is provided in the battery box 100, a battery module 300 is provided in the mounting frame 200, a hollow flow channel (not shown) is provided in the side wall of the mounting frame 200, the battery module 300 includes a plurality of batteries, each battery is provided with a first temperature sensor, a through hole is opened in the side wall of the battery box 100, a circuit board 400 is provided at the through hole, a sealing ring is provided at the connection between the circuit board 400 and the through hole, an inner connector 410 and a built-in sensor (not shown) are provided on one side of the circuit board 400 facing the inside of the battery box 100, an outer connector 420 and an external sensor (not shown) are provided on one side of the circuit board 400 facing the outside of the battery box 100, the first temperature sensor is electrically connected to the inner connector 410, the inner connector 410 is electrically connected to the outer connector 420, and the outer connector 420 is electrically connected to the battery management system.

[0021] Specifically, the circuit board 400 is made of epoxy resin material, and its area is larger than the area of ​​the through hole of the battery box 100. The external connectors 420 are arranged in parallel at the through hole. The opening of the circuit board 400 is preferably a rectangular or oblong hole. A sealing ring is placed on the front of the circuit board 400, and the sealing ring is pressed to the edge of the through hole of the battery box 100, and the circuit board 400 is locked by screws. The sealing ring is used to prevent the insulating oil from flowing out from the gap between the circuit board 400 and the through hole of the battery box 100. The sealing ring is placed on the circuit board 400 in an oblong shape, and the pins are welded on the circuit board 400 to limit the displacement of the sealing ring. The sealing ring must be at the same geometric center as the through hole of the battery box 100. The circuit board 400 outside the sealing ring is evenly opened and fixed to the battery box 100 by screws. The internal connector 410 is welded on the back of the circuit board 400, facing the battery in the battery box 100, and connecting the voltage acquisition line and temperature acquisition line of the battery. The external connector 420 is welded on the front side of the circuit board 400 , facing the battery management system outside the battery box 100 , and plugged into the circuit board of the battery management system.

[0022] like Figure 1 As shown, the monitoring method of the submerged energy storage battery box according to the embodiment of the present invention comprises the following steps: Step S100: introducing insulating oil into the battery box 100 through an immersion system; Step S200: collecting the temperature of each battery through the first temperature sensor to obtain the average temperature of the battery module 300; Step S300: When the average temperature is greater than the first preset temperature, the battery management system controls the immersion system to adjust the temperature of the insulating oil to cool the battery module; Step S400: when the average temperature is greater than a second preset temperature, the battery management system controls the immersion system to adjust the temperature of the insulating oil, and controls the refrigeration system to introduce refrigerant gas into the hollow flow channel to cool the battery module; the second preset temperature is greater than the first preset temperature; Step S500: Detecting the conductivity of the insulating oil by means of a built-in sensor, and replacing the insulating oil when the conductivity of the insulating oil exceeds a first preset value; Step S600: Detect the oil leakage state of the battery box 100 through an external sensor, and generate an alarm when the battery box 100 leaks oil.

[0023] Specifically, a liquid level sensor is provided inside the battery box 100. When the immersion system introduces insulating oil into the battery box 100, when the liquid level sensor detects that the insulating oil inside the battery box 100 reaches a preset height, the introduction of insulating oil into the battery box 100 is stopped. The insulating oil is used to soak the battery module 300 to cool down the batteries of the battery module 300.

[0024] In this example, the immersion system includes an oil storage tank and a circulation pump, a temperature control element is provided in the oil storage tank, insulating oil is stored in the oil storage tank, the liquid outlet of the oil storage tank is connected to one end of the circulation pump, the other end of the circulation pump is connected to the liquid inlet of the battery box 100, the liquid outlet of the battery box 100 is connected to the liquid inlet of the oil storage tank, a first solenoid valve is provided between the liquid outlet of the oil storage tank and one end of the circulation pump, and a second solenoid valve is provided between the liquid outlet of the battery box 100 and the liquid inlet of the oil storage tank.

[0025] Before the immersion system introduces insulating oil into the battery box 100, the insulating oil is adjusted to the required temperature through the temperature control element, and then the first solenoid valve is opened and the second solenoid valve is closed. The circulating pump pumps the insulating oil in the oil storage tank into the battery box 100 until the liquid level sensor detects that the insulating oil inside the battery box 100 reaches a preset height. Then, the first solenoid valve is closed and the battery module 300 is cooled by the insulating oil in the battery box 100.

[0026] Then, the temperature of the batteries of the battery module 300 is collected. Since the temperature of each battery is not exactly the same, it is necessary to collect the temperature of each battery through a first temperature sensor provided on each battery, and then calculate the average temperature of the entire battery module 300.

[0027] The above-mentioned step S300: when the average temperature is greater than the first preset temperature, the battery management system controls the immersion system to adjust the temperature of the insulating oil to cool the battery module 300, includes the following three steps: (1) When the average temperature is greater than a first preset temperature, the battery management system controls the temperature regulating element to lower the temperature of the insulating oil in the oil storage tank; (2) When the temperature of the insulating oil in the oil storage tank drops to a third preset temperature, the battery management system controls the first solenoid valve and the second solenoid valve to open; (3) The circulating pump pumps the insulating oil in the oil storage tank into the battery box 100 to replace the insulating oil in the battery box 100, and controls the insulating oil in the oil storage tank to circulate between the battery box 100 and the oil storage tank to cool the battery module.

[0028] When the temperature of the battery module 300 in the battery box 100 is slightly higher than the upper limit of the normal range (i.e., the average temperature is greater than the first preset temperature), the battery management system controls the temperature regulating element to reduce the temperature of the insulating oil in the oil storage tank. After the temperature of the insulating oil is reduced to a certain extent (i.e., the temperature of the insulating oil is less than the third preset temperature), the battery management system controls the first solenoid valve and the second solenoid valve to open, so that the circulation pump pumps the insulating oil in the oil storage tank into the battery box 100, replacing the original insulating oil in the battery box 100, and controls the insulating oil in the oil storage tank to circulate between the battery box 100 and the oil storage tank, continuously cooling the battery module 300, so that the battery module 300 returns to normal temperature. Among them, the temperature regulating element may include a heating plate, a heating wire and other elements, and the temperature of the insulating oil in the oil storage tank can be adjusted by adjusting the temperature of the temperature regulating element.

[0029] When the average temperature of the battery module 300 is obviously beyond the normal range, that is, the average temperature is greater than the second preset temperature, at this time, the immersion system alone to adjust the temperature of the insulating oil may be inefficient and unable to cool the battery module 300 in time. To this end, while the battery management system controls the immersion system to adjust the temperature of the insulating oil and cools the battery module 300 through the insulating oil, it also controls the refrigeration system to pass refrigerant gas into the hollow flow channel to cool the battery module 300. Among them, the mounting frame 200 is composed of a plurality of support plates distributed at intervals in the transverse direction and a plurality of support plates distributed in the longitudinal direction. The mounting frame 200 is used to position and fix the battery module 300, and a hollow flow channel is provided inside the mounting frame 200; the refrigeration system is used to generate refrigerant gas and pass the refrigerant gas into the hollow flow channel, and assists in cooling the battery module 300 through the mounting frame 200, further improving the cooling efficiency, so that the battery of the battery module 300 is cooled as soon as possible to avoid damage to the battery due to excessive temperature.

[0030] It should be noted that the second preset temperature is greater than the first preset temperature, and the third preset temperature is less than the first preset temperature.

[0031] Furthermore, in some embodiments of the present invention, the built-in sensor is used to monitor the temperature and conductivity of the insulating oil inside the battery box 100. The built-in sensor includes a conductivity sensor and a second temperature sensor. The conductivity sensor has a bimetallic strip. The conductivity sensor is used to determine the conductivity of the insulating oil by measuring the liquid resistance between the bimetallic strips; the second temperature sensor is used to collect the temperature of the insulating oil.

[0032] The above step S500: collecting the temperature and conductivity of the insulating oil through the built-in sensor, and replacing the insulating oil when the conductivity of the insulating oil exceeds the first preset value, includes the following three steps: (1) The battery management system applies a DC voltage excitation between the bimetallic strips of the conductivity sensor and obtains the DC current value; (2) Calculate the resistance between the bimetallic strips based on the DC voltage and DC current; (3) Determine the conductivity based on the resistance value.

[0033] By collecting the temperature of the insulating oil through the second temperature sensor, the temperature of the insulating oil in the battery box 100 can be monitored in real time. In this way, when the average temperature of the battery module 300 does not exceed the first preset value but the temperature of the insulating oil is high, the first solenoid valve and the second solenoid valve can be opened in time to allow the circulating pump to drive the insulating oil in the oil storage tank to circulate in the oil storage tank and the battery box 100, thereby reducing the temperature of the insulating oil in the battery box 100.

[0034] At the same time, in order to monitor the conductivity of the insulating oil in the battery box 100 in real time, the battery management system applies a DC voltage excitation between the bimetallic strips of the conductivity sensor and obtains the DC current value between the bimetallic strips. In this way, the resistance value between the bimetallic strips can be calculated based on the DC voltage and DC current, thereby determining the conductivity of the insulating oil. When the resistance value is less than the set threshold, it means that the conductivity of the insulating oil is too high, and the system alarm is issued to remind the user that the insulating oil needs to be replaced.

[0035] Furthermore, in some embodiments of the present invention, the immersion system further includes a spare oil storage tank, in which spare insulating oil is stored, the first solenoid valve and the second solenoid valve are both three-way solenoid valves, the first inlet of the first solenoid valve is connected to the liquid outlet of the oil storage tank, the second inlet of the first solenoid valve is connected to the liquid outlet of the spare oil storage tank, the outlet of the first solenoid valve is connected to one end of the circulation pump, the inlet of the second solenoid valve is connected to the liquid outlet of the battery box, the first outlet of the second solenoid valve is connected to the liquid inlet of the oil storage tank, and the second outlet of the second solenoid valve is connected to the liquid inlet of the spare oil storage tank. The monitoring method of the submerged energy storage battery box according to an embodiment of the present invention also includes the following two steps: (1) The battery management system controls the first outlet of the second solenoid valve to open, and the circulation pump pumps the insulating oil in the battery box 100 into the battery box 100; (2) The battery management system controls the second inlet of the first solenoid valve to open, and the spare oil storage tank pumps the spare insulating oil into the battery box 100 until the spare insulating oil in the battery box 100 reaches a preset height.

[0036] When it is detected that the conductivity of the insulating oil in the battery box 100 is too high, the insulating oil needs to be replaced. In order to be able to replace the insulating oil in time, a spare oil storage tank is set, and the spare insulating oil is stored in the spare oil storage tank. When the insulating oil needs to be replaced, first open the first outlet of the second solenoid valve so that the circulation pump pumps the insulating oil in the battery box 100 into the oil storage tank, and then close the second solenoid valve. Then, the battery management system controls the second inlet of the first solenoid valve to open, and the spare oil storage tank pumps the spare insulating oil into the battery box 100 until the spare insulating oil in the battery box 100 reaches a preset height. Through such a setting, when the conductivity of the insulating oil is too high, the spare insulating oil with normal conductivity can be automatically replaced in time to improve efficiency and avoid damage to the battery module 300.

[0037] Furthermore, in some embodiments of the present invention, the external sensor is a capacitive sensor. When the insulating oil leaks and fills the capacitor, the capacitance value changes. Therefore, in the above step S600: the step of detecting the oil leakage state of the battery box 100 by the external sensor includes the following three steps: (1) The battery management system applies AC voltage excitation to the capacitor of the external sensor and obtains the AC current value; (2) Calculate the capacitance value of the external sensor based on the AC voltage and AC current values; (3) When the capacitance value is greater than the preset threshold, it indicates that the battery box 100 is leaking oil.

[0038] When the battery box 100 leaks oil, the insulating oil will drip onto the external sensor, causing the capacitance value of the external sensor to change. Therefore, by monitoring the capacitance value of the external sensor, it can be determined whether the battery box 100 is leaking oil. To this end, an AC voltage excitation is applied to the capacitance of the external sensor, and the AC current value is obtained. According to the AC voltage and AC current values, the capacitance value of the external sensor can be calculated. When the capacitance value is greater than the preset threshold, it indicates that the battery box 100 is leaking oil; at this time, an alarm operation needs to be performed so that the operator can check in time.

[0039] Furthermore, in some embodiments of the present invention, an isolation chamber is provided at the top of the battery box 100, a smoke sensor and an openable and closable hatch are provided at the bottom of the isolation chamber, and a flame retardant is provided in the isolation chamber. The monitoring method of the submerged energy storage battery box according to the embodiment of the present invention also includes the following two steps: (1) When the smoke sensor detects a smoke signal, the battery management system opens the hatch; (2) The flame retardant in the isolation chamber flows into the chamber in the battery box 100 where the battery module 300 is located.

[0040] When the temperature of the batteries in the battery box 100 is too high, thermal runaway will occur, and spontaneous combustion may occur. To avoid this situation, a smoke sensor is installed at the bottom of the isolation chamber (above the battery module 300). When the smoke sensor detects a smoke signal, it indicates that spontaneous combustion may occur. At this time, the hatch of the isolation chamber is opened to allow the flame retardant in the isolation chamber to enter the chamber where the battery module 300 is located in the battery box 100 for flame retardancy.

[0041] According to the monitoring method of the submerged energy storage battery box of the embodiment of the present invention, the conditions in the battery box 100 can be monitored in real time, the temperature management of the battery module 300 can be achieved, and the temperature of the battery module 300 in the battery box 100 can be avoided from being too high; at the same time, the sealing performance of the battery box 100 is improved by the sealing ring, and oil leakage of the battery box 100 is avoided; through external sensors and internal sensors, the conductivity of the insulating oil can be detected, and the oil leakage state of the battery box 100 can be detected, thereby improving the stability and reliability of the battery box 100.

[0042] On the other hand, the present invention also provides an immersion energy storage battery box, such as Figure 2 and Figure 3 As shown, an immersion energy storage battery box is provided with a mounting frame 200, a battery module 300 is provided in the mounting frame 200, a hollow flow channel (not shown) is provided in the side wall of the mounting frame 200, the battery module 300 includes a plurality of batteries, each battery is provided with a first temperature sensor, a through hole is provided in the side wall of the battery box 100, a circuit board 400 is provided at the through hole, a sealing ring is provided at the connection between the circuit board 400 and the through hole, an inner plug-in connector 410 and a built-in sensor (not shown) are provided on the side of the circuit board 400 facing the inside of the battery box 100, an outer plug-in connector 420 and an external sensor (not shown) are provided on the side of the circuit board 400 facing the outside of the battery box 100, the first temperature sensor is electrically connected to the inner plug-in connector 410, the inner plug-in connector 410 is electrically connected to the outer plug-in connector 420, and the outer plug-in connector 420 is electrically connected to the battery management system. The immersion energy storage battery box is used to implement the monitoring method of the immersion energy storage battery box described in the above-mentioned embodiment.

[0043] The submerged energy storage battery box according to the embodiment of the present invention can monitor the conditions in the battery box 100 in real time, realize temperature management of the battery module 300, and avoid the temperature of the battery module 300 in the battery box 100 being too high; at the same time, the sealing performance of the battery box 100 is improved by the sealing ring, and oil leakage of the battery box 100 is avoided; through external sensors and internal sensors, the conductivity of the insulating oil can be detected, and the oil leakage state of the battery box 100 can be detected, thereby improving the stability and reliability of the battery box 100.

[0044] On the other hand, an embodiment of the present invention further provides an electronic device, including: A memory for storing program instructions; The processor is used to call the program instructions stored in the memory and execute the monitoring method of the submerged energy storage battery box described in the above-mentioned embodiment according to the obtained program instructions.

[0045] An embodiment of the present application further provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the above-mentioned monitoring method of the submerged energy storage battery box is implemented.

[0046] As a non-transient computer-readable storage medium, the memory can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and are implemented to be located in one place, or may also be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0047] It will be appreciated by those skilled in the art that all or some of the steps and systems in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0048] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A method for monitoring an immersion energy storage battery box, characterized in that: Applied to a battery box, wherein a mounting frame is provided in the battery box, a battery module is provided in the mounting frame, a side wall of the mounting frame is provided with a hollow flow channel, the battery module includes a plurality of batteries, each of the batteries is provided with a first temperature sensor, a through hole is provided in the side wall of the battery box, a circuit board is provided at the through hole, a sealing ring is provided at the connection between the circuit board and the through hole, an inner plug-in connector and a built-in sensor are provided on a side of the circuit board facing the inside of the battery box, an outer plug-in connector and an external sensor are provided on a side of the circuit board facing the outside of the battery box, the first temperature sensor is electrically connected to the inner plug-in connector, the inner plug-in connector is electrically connected to the outer plug-in connector, and the outer plug-in connector is electrically connected to a battery management system; The monitoring method comprises: Introducing insulating oil into the interior of the battery box through an immersion system; The first temperature sensor is used to collect the temperature of each battery to obtain the average temperature of the battery module; When the average temperature is greater than a first preset temperature, the battery management system controls the immersion system to adjust the temperature of the insulating oil to cool the battery module; When the average temperature is greater than a second preset temperature, the battery management system controls the immersion system to adjust the temperature of the insulating oil, and controls the refrigeration system to introduce refrigerant gas into the hollow flow channel to cool the battery module; the second preset temperature is greater than the first preset temperature; detecting the electrical conductivity of the insulating oil by means of the built-in sensor, and replacing the insulating oil when the electrical conductivity of the insulating oil exceeds a first preset value; The oil leakage state of the battery box is detected by the external sensor, and an alarm is issued when oil leakage occurs in the battery box.

2. The monitoring method of the submerged energy storage battery box according to claim 1, characterized in that: The immersion system comprises an oil storage tank and a circulation pump, wherein a temperature regulating element is arranged in the oil storage tank, wherein the insulating oil is stored in the oil storage tank, wherein a liquid outlet of the oil storage tank is connected to one end of the circulation pump, wherein the other end of the circulation pump is connected to a liquid inlet of the battery box, wherein the liquid outlet of the battery box is communicated with a liquid inlet of the oil storage tank, wherein a first solenoid valve is arranged between the liquid outlet of the oil storage tank and one end of the circulation pump, and a second solenoid valve is arranged between the liquid outlet of the battery box and the liquid inlet of the oil storage tank; wherein a liquid level sensor is arranged in the battery box; When the average temperature is greater than a first preset temperature, the battery management system controls the immersion system to adjust the temperature of the insulating oil to cool the battery module, comprising: When the average temperature is greater than a first preset temperature, the battery management system controls the temperature regulating element to lower the temperature of the insulating oil in the oil storage tank; When the temperature of the insulating oil in the oil storage tank drops to a third preset temperature, the battery management system controls the first solenoid valve and the second solenoid valve to open; the third preset temperature is lower than the first preset temperature; The circulation pump pumps the insulating oil in the oil storage tank into the battery box to replace the insulating oil in the battery box, and controls the insulating oil in the oil storage tank to circulate between the battery box and the oil storage tank to cool the battery module.

3. The monitoring method of the submerged energy storage battery box according to claim 2, characterized in that: The immersion system further includes a spare oil storage tank, in which spare insulating oil is stored, the first solenoid valve and the second solenoid valve are both three-way solenoid valves, the first inlet of the first solenoid valve is communicated with the liquid outlet of the oil storage tank, the second inlet of the first solenoid valve is communicated with the liquid outlet of the spare oil storage tank, the outlet of the first solenoid valve is communicated with one end of the circulation pump, the inlet of the second solenoid valve is communicated with the liquid outlet of the battery box, the first outlet of the second solenoid valve is communicated with the liquid inlet of the oil storage tank, and the second outlet of the second solenoid valve is communicated with the liquid inlet of the spare oil storage tank; When the electrical conductivity of the insulating oil exceeds a first preset value, the step of replacing the insulating oil comprises: The battery management system controls the first outlet of the second solenoid valve to open, and after the circulating pump pumps the insulating oil in the battery box into the oil storage tank, the first outlet of the second solenoid valve is closed; The battery management system controls the second inlet of the first solenoid valve to open, and the backup oil storage tank pumps the backup insulating oil into the battery box until the backup insulating oil in the battery box reaches a preset height.

4. The monitoring method of the submerged energy storage battery box according to claim 1, characterized in that: The circuit board is made of epoxy resin material, and the area of ​​the circuit board is larger than the area of ​​the through hole of the battery box. The sealing ring is fixed to the circuit board by welding pins. The sealing ring and the through hole of the battery box have the same geometric center, and the circuit board is fixed to the battery box by screws.

5. The monitoring method of the submerged energy storage battery box according to claim 1, characterized in that: The built-in sensor includes a conductivity sensor, and the conductivity sensor has a bimetallic strip; the step of detecting the conductivity of the insulating oil by the built-in sensor includes: The battery management system applies a DC voltage excitation between the bimetallic strips of the conductivity sensor and obtains a DC current value; Calculating the resistance value between the bimetallic strips according to the DC voltage and the DC current value; The conductivity is determined according to the resistance value.

6. The method for monitoring an immersion energy storage battery box according to claim 1, characterized in that: The external sensor adopts a capacitive sensor; The step of detecting the oil leakage state of the battery box by the external sensor comprises: The battery management system applies an AC voltage excitation to the capacitor of the external sensor and obtains an AC current value; Calculating the capacitance value of the external sensor according to the AC voltage and the AC current value; When the capacitance value is greater than a preset threshold, it indicates that the battery box is leaking oil.

7. The method for monitoring an immersion energy storage battery box according to claim 1, characterized in that: An isolation chamber is provided at the top of the battery box, the isolation chamber is located above the battery module, a smoke sensor and an openable and closable hatch are provided at the bottom of the isolation chamber, and a flame retardant is provided in the isolation chamber; The monitoring method further comprises: When the smoke sensor detects a smoke signal, the battery management system opens the hatch; The flame retardant in the isolation chamber enters the chamber in the battery box where the battery module is located.

8. An immersion energy storage battery box, characterized in that: The submerged energy storage battery box is provided with a mounting frame, a battery module is provided in the mounting frame, a hollow flow channel is provided in the side wall of the mounting frame, the battery module includes a plurality of batteries, each of the batteries is provided with a first temperature sensor, a through hole is provided in one side wall of the submerged energy storage battery box, a circuit board is provided at the through hole, a sealing ring is provided at the connection between the circuit board and the through hole, an inner connector and a built-in sensor are provided on a side of the circuit board facing the inside of the battery box, an outer connector and an external sensor are provided on a side of the circuit board facing the outside of the submerged energy storage battery box, the first temperature sensor is electrically connected to the inner connector, the inner connector is electrically connected to the outer connector, and the outer connector is electrically connected to a battery management system; the submerged energy storage battery box is used to implement the monitoring method of the submerged energy storage battery box as described in any one of claims 1 to 7.

9. An electronic device, characterized in that: include: A memory for storing program instructions; A processor is used to call the program instructions stored in the memory, and execute the monitoring method of the submerged energy storage battery box according to any one of claims 1-7 according to the obtained program instructions.

10. A storage medium, characterized in that: The storage medium stores computer executable instructions, and the computer executable instructions are used to enable a computer to execute the monitoring method for the submerged energy storage battery box according to any one of claims 1 to 7.

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