Immersion Energy Storage Battery Box and Its Monitoring Method, Electronic Device, and Storage Medium

Abstract

The present invention discloses an immersion energy storage battery box and its monitoring method, electronic device, and storage medium, relating to the technical field of battery management. The method includes: introducing insulating oil into the interior of the battery box through an immersion system; obtaining the average temperature of the battery module through a first temperature sensor; 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 down 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 refrigerating gas into the hollow flow channel to cool down the battery module; detecting the conductivity of the insulating oil through an internal sensor, and replacing the insulating oil when the conductivity of the insulating oil exceeds a first preset value; detecting the oil leakage state of the battery box through an external sensor, and giving an alarm when the battery box leaks oil. This 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 energy storage battery box and its monitoring method, electronic device, and storage medium. Background Art

[0002] With the growth of global energy demand and the popularization of renewable energy, the development of energy storage technology has become particularly important. As an efficient energy storage solution, the working principle of an immersion energy storage battery box is to immerse battery components in insulating oil to achieve better thermal management and safety performance. However, this design has relatively high requirements for sealing to prevent the spillage of insulating oil and the intrusion of external contaminants. At the same time, since it is necessary to monitor the batteries in the battery box in real time, this design makes the monitoring of the batteries more complex. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides an immersion energy storage battery box and its monitoring method, electronic device, and storage medium, which can improve the sealing performance of the battery box and monitor the batteries in the battery box in real time.

[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. An installation frame is provided inside the battery box, a battery module is provided inside the installation frame, a hollow flow channel is provided on the side wall of the installation frame, the battery module includes a plurality of batteries, each battery is provided with a first temperature sensor, a through hole is provided on 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 member and an internal sensor are provided on the side of the circuit board facing the inside of the battery box, an outer plug-in member and an external sensor are provided on the side of the circuit board facing the outside of the battery box, the first temperature sensor is electrically connected to the inner plug-in member, the inner plug-in member is electrically connected to the outer plug-in member, and the outer plug-in member is electrically connected to a battery management system;

[0005] The monitoring method includes:

[0006] Inject insulating oil into the inside of the battery box through an immersion system;

[0007] Collect the temperature of each battery through the first temperature sensor to obtain the average temperature of the battery module;

[0008] 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;

[0009] 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 refrigerating gas into the hollow flow channel to cool down the battery module; the second preset temperature is greater than the first preset temperature.

[0010] Detect the conductivity of the insulating oil through the built-in sensor, and replace the insulating oil when the conductivity of the insulating oil exceeds a first preset value.

[0011] Detect the oil leakage state of the battery box through the external sensor, and give an alarm when the battery box leaks oil.

[0012] According to some embodiments of the present invention, the immersion system includes an oil storage tank and a circulation pump. A temperature regulating element is arranged in the oil storage tank. 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 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; a liquid level sensor is arranged in the battery box.

[0013] The step of 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 down the battery module includes:

[0014] When the average temperature is greater than the 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.

[0015] 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 less than the first preset temperature.

[0016] 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 down the battery module.

[0017] 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;

[0018] The step of replacing the insulating oil when the conductivity of the insulating oil exceeds a first preset value includes:

[0019] The battery management system controls the first outlet of the second solenoid valve to open. After the circulation pump pumps the insulating oil in the battery box into the oil storage tank, the first outlet of the second solenoid valve is closed;

[0020] 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 until the spare insulating oil in the battery box reaches a preset height.

[0021] 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 on the circuit board by soldering pin headers. The sealing ring and the through hole of the battery box have the same geometric center, and the circuit board is fixed on the battery box by screws.

[0022] According to some embodiments of the present invention, 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:

[0023] The battery management system applies a DC voltage excitation between the bimetallic strips of the conductivity sensor and obtains a DC current value;

[0024] Calculate the resistance value between the bimetallic strips according to the DC voltage and the DC current value;

[0025] Determine the conductivity according to the resistance value.

[0026] According to some embodiments of the present invention, the external sensor is a capacitive sensor;

[0027] The step of detecting the oil leakage state of the battery box by the external sensor includes:

[0028] The battery management system applies an alternating voltage excitation to the capacitance of the external sensor and obtains an alternating current value;

[0029] According to the alternating voltage and the alternating current value, calculate the capacitance value of the external sensor;

[0030] When the capacitance value is greater than a preset threshold, it indicates that the battery box is in a state of oil leakage.

[0031] According to some embodiments of the present invention, an isolation chamber is provided at the top inside 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 inside the isolation chamber;

[0032] The monitoring method further includes:

[0033] When the smoke sensor detects a smoke signal, the battery management system opens the hatch;

[0034] The flame retardant inside the isolation chamber enters the chamber where the battery module is located inside the battery box.

[0035] In a second aspect, an immersion energy storage battery box according to an embodiment of the present invention. An installation frame is provided inside the immersion energy storage battery box. A battery module is provided inside the installation frame. A hollow flow channel is provided inside the side wall of the installation frame. The battery module includes a plurality of batteries, and each battery is provided with a first temperature sensor. A through hole is provided on one side wall of the immersion energy storage battery box. A circuit board is provided at the through hole, and a sealing ring is provided at the connection between the circuit board and the through hole. An inner plug-in and an internal sensor are provided on the side of the circuit board facing the inside of the battery box, and an outer plug-in and an external sensor are provided on the 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 plug-in, the inner plug-in is electrically connected to the outer plug-in, and the outer plug-in is electrically connected to the battery management system; the immersion energy storage battery box is used to implement the monitoring method of the above-mentioned immersion energy storage battery box.

[0036] In a third aspect, an electronic device according to an embodiment of the present invention includes:

[0037] A memory for storing program instructions;

[0038] A processor for calling the program instructions stored in the memory and executing the monitoring method of the above-mentioned immersion energy storage battery box according to the obtained program instructions.

[0039] Fourthly, a storage medium according to an embodiment of the present invention is characterized in that the storage medium stores computer-executable instructions for causing a computer to execute the monitoring method of the immersion energy storage battery box described above.

[0040] The immersion energy storage battery box, its monitoring method, electronic device and storage medium according to the embodiments of the present invention at least have the following beneficial effects: the sealing performance of the battery box is improved through the sealing ring, avoiding oil leakage in the battery box; through the external sensor and the internal sensor, the conductivity of the insulating oil can be detected, and the oil leakage state of the battery box can be detected, improving the stability and reliability of the battery box; through the internal plug-in and the external plug-in, the conditions inside the battery box are monitored in real time, realizing the temperature management of the battery module and avoiding the overheating of the battery module inside the battery box.

[0041] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

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

[0043] Figure 1 is a flowchart of the steps of the monitoring method of the immersion energy storage battery box according to the embodiment of the present invention;

[0044] Figure 2 is a schematic structural diagram of the immersion energy storage battery system according to the embodiment of the present invention;

[0045] Figure 3 is a schematic structural diagram of the immersion energy storage battery system from another perspective according to the embodiment of the present invention. Detailed Embodiments

[0046] The embodiments of the present invention are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application. For the step numbers in the following embodiments, they are only set for the convenience of explanation and illustration, and no limitation is imposed on the order between the steps. The execution order of each step in the embodiments can be adjusted adaptively according to the understanding of those skilled in the art.

[0047] In the description of the present invention, it should be understood that when it comes to orientation descriptions, such as the orientations or positional relationships indicated by up, down, front, back, left, right, etc., they are based on the orientations or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0048] The terms "first", "second", "third", "fourth", etc. in the specification, claims and drawings of the present invention are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. 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 further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0049] Referring to "embodiments" in the present invention means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0050] With the growth of global energy demand and the popularization of renewable energy, the development of energy storage technology has become particularly important. As an efficient energy storage solution, the submerged energy storage battery box works by submerging the battery components in insulating oil to achieve better thermal management and safety performance. However, this design has relatively high requirements for sealing to prevent the spillage of insulating oil and the intrusion of external pollutants. At the same time, since it is necessary to monitor the batteries in the battery box in real time, this design makes the monitoring of the batteries more complicated.

[0051] Therefore, the embodiments of the present invention propose a submerged energy storage battery box and its monitoring method, electronic device and storage medium. By using a sealing ring, the sealing performance of the battery box is improved, and oil leakage of the battery box 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 can be detected, improving the stability and reliability of the battery box; through the circuit board and the battery management system, the conditions inside the battery box can be monitored in real time, realizing temperature management of the battery module and avoiding the temperature of the battery module inside the battery box from being too high.

[0052] On the one hand, the embodiments of the present invention propose a monitoring method for a submerged energy storage battery box, which is applied to the battery box 100, asFigure 2 and Figure 3 As shown in Figure 3 , an installation frame 200 is provided inside the battery box 100, a battery module 300 is provided inside the installation frame 200, a hollow flow channel (not shown in the figure) is provided inside the side wall of the installation frame 200. The battery module 300 includes a plurality of batteries, and each battery is provided with a first temperature sensor. A through hole is provided on the side wall of the battery box 100, and 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 member 410 and a built-in sensor (not shown in the figure) are provided on the side of the circuit board 400 facing the inside of the battery box 100, and an outer plug-in member 420 and an external sensor (not shown in the figure) 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 member 410, the inner plug-in member 410 is electrically connected to the outer plug-in member 420, and the outer plug-in member 420 is electrically connected to the battery management system.

[0053] Specifically, the circuit board 400 is made of epoxy resin material and has an area larger than the area of the through hole of the battery box 100. The outer plug-in members 420 are arranged in parallel at the through hole. The openings on the circuit board 400 are preferably rectangular or oblong holes. A sealing ring is placed on the front side of the circuit board 400 and 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 of 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 oval shape, and the pin headers soldered on the circuit board 400 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. Uniform openings are provided on the circuit board 400 outside the sealing ring and fixed on the battery box 100 by screws. The inner plug-in member 410 is soldered on the back side of the circuit board 400, facing the batteries inside the battery box 100, and connects the voltage acquisition line and the temperature acquisition line of the batteries. The outer plug-in member 420 is soldered on the front side of the circuit board 400, facing the battery management system outside the battery box 100, and plugs into the circuit board of the battery management system.

[0054] As Figure 1 shown, the monitoring method of the immersion energy storage battery box according to the embodiment of the present invention includes the following steps:

[0055] Step S100: Inject insulating oil into the inside of the battery box 100 through the immersion system;

[0056] Step S200: Collect the temperature of each battery through the first temperature sensor to obtain the average temperature of the battery module 300;

[0057] 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 down the battery module;

[0058] Step S400: When the average temperature is greater than the 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 refrigerating gas into the hollow flow channel to cool the battery module; the second preset temperature is greater than the first preset temperature.

[0059] Step S500: Detect the conductivity of the insulating oil through the built-in sensor, and replace the insulating oil when the conductivity of the insulating oil exceeds the first preset value.

[0060] Step S600: Detect the oil leakage state of the battery box 100 through the external sensor, and give an alarm when the battery box 100 leaks oil.

[0061] Specifically, a liquid level sensor is arranged 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 the preset height, stop introducing insulating oil into the battery box 100. The insulating oil is used to soak the battery module 300 to cool the batteries of the battery module 300.

[0062] In this example, the immersion system includes an oil storage tank and a circulation pump. A temperature regulating element is arranged in the oil storage tank. The oil storage tank stores insulating oil. 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 communicated with the liquid inlet of the oil storage tank, 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 100 and the liquid inlet of the oil storage tank.

[0063] Before the immersion system introduces insulating oil into the battery box 100, after adjusting the insulating oil to the required temperature through the temperature regulating element, open the first solenoid valve and close the second solenoid valve. The circulation 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 the preset height, then close the first solenoid valve, and cool the battery module 300 through the insulating oil in the battery box 100.

[0064] Then, collect the temperatures of the batteries of the battery module 300. Since the temperatures of each battery are not exactly the same, it is necessary to collect the temperature of each battery through the first temperature sensor arranged on each battery, and then calculate the average temperature of the entire battery module 300.

[0065] The above step S300: When the average temperature is greater than the first preset temperature, the step that 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:

[0066] When the average temperature is greater than the first preset temperature, the battery management system controls the temperature regulating element to lower the temperature of the insulating oil in the storage tank.

[0067] When the temperature of the insulating oil in the storage tank drops to the third preset temperature, the battery management system controls the first solenoid valve and the second solenoid valve to open.

[0068] The circulation pump pumps the insulating oil in the storage tank into the battery box 100 to replace the insulating oil in the battery box 100, and controls the insulating oil in the storage tank to circulate between the battery box 100 and the storage tank to cool the battery module.

[0069] 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 lower the temperature of the insulating oil in the storage tank. After the temperature in the insulating oil drops 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 storage tank into the battery box 100 to replace the original insulating oil in the battery box 100, and controls the insulating oil in the storage tank to circulate between the battery box 100 and the storage tank, continuously cooling the battery module 300 to make the battery module 300 return to the normal temperature. Among them, the temperature regulating element can include elements such as heating sheets and heating wires. By adjusting the temperature of the temperature regulating element, the temperature of the insulating oil in the storage tank can be adjusted.

[0070] When the average temperature of the battery module 300 significantly exceeds the normal range, that is, the average temperature is greater than the second preset temperature. At this time, relying solely on the immersion system to adjust the temperature of the insulating oil may be less efficient and unable to cool the battery module 300 in time. For this reason, 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 introduce refrigerating gas into the hollow flow channel to cool the battery module 300. Among them, the installation frame 200 is composed of a plurality of horizontally spaced support plates and a plurality of longitudinally distributed support plates. The installation frame 200 is used to position and fix the battery module 300, and a hollow flow channel is arranged inside the installation frame 200; the refrigeration system is used to generate refrigerating gas and introduce the refrigerating gas into the hollow flow channel, and the installation frame 200 is used to assist in cooling the battery module 300 to further improve the cooling efficiency, so that the battery of the battery module 300 can be cooled as soon as possible to avoid damage to the battery due to excessive temperature.

[0071] 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.

[0072] Further, 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 bimetal sheet. The conductivity sensor is used to judge the conductivity of the insulating oil by measuring the liquid resistance between the bimetal sheets; the second temperature sensor is used to collect the temperature of the insulating oil.

[0073] The above step S500: Collect the temperature and conductivity of the insulating oil through the built-in sensor. When the conductivity of the insulating oil exceeds the first preset value, replace the insulating oil, including the following three steps:

[0074] (1) The battery management system applies a DC voltage excitation between the bimetal sheets of the conductivity sensor and obtains the DC current value;

[0075] (2) Calculate the resistance value between the bimetal sheets according to the DC voltage and the DC current;

[0076] (3) Determine the conductivity according to the resistance value.

[0077] 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 relatively high, the first solenoid valve and the second solenoid valve can be opened in time, so that the circulating pump drives the insulating oil in the storage tank to circulate between the storage tank and the battery box 100, reducing the temperature of the insulating oil in the battery box 100.

[0078] 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 bimetal sheets of the conductivity sensor and obtains the DC current value between the bimetal sheets. In this way, the resistance value between the bimetal sheets can be calculated according to the DC voltage and the DC current, so as to determine 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 gives an alarm to remind the user to replace the insulating oil.

[0079] Further, in some embodiments of the present invention, the immersion system further includes a spare storage tank, and the spare storage tank stores spare insulating oil. 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 storage tank, the second inlet of the first solenoid valve is communicated with the liquid outlet of the spare storage tank, the outlet of the first solenoid valve is communicated with one end of the circulating 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 storage tank, and the second outlet of the second solenoid valve is communicated with the liquid inlet of the spare storage tank. According to the monitoring method of the immersion energy storage battery box of the embodiment of the present invention, the following two steps are further included:

[0080] (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.

[0081] (2) The battery management system controls the second inlet of the first solenoid valve to open, and the standby oil storage tank pumps the standby insulating oil into the battery box 100 until the standby insulating oil in the battery box 100 reaches the preset height.

[0082] 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 a timely manner, a standby oil storage tank is provided, and standby insulating oil is stored in the standby 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 standby oil storage tank pumps the standby insulating oil into the battery box 100 until the standby insulating oil in the battery box 100 reaches the preset height. Through such a setting, it is possible to automatically replace the standby insulating oil with normal conductivity in a timely manner when the conductivity of the insulating oil is too high, improve the efficiency, and avoid damaging the battery module 300.

[0083] Further, 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:

[0084] (1) The battery management system applies an AC voltage excitation to the capacitance of the external sensor and obtains the AC current value.

[0085] (2) Calculate the capacitance value of the external sensor according to the AC voltage and the AC current value.

[0086] (3) When the capacitance value is greater than the preset threshold, it indicates that the battery box 100 is in an oil leakage state.

[0087] When the battery box 100 leaks oil, the insulating oil will drip on 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 judged whether the battery box 100 is in an oil leakage state. For this reason, 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 the AC current value, 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 in an oil leakage state; at this time, an alarm operation needs to be performed so that the operator can check in time.

[0088] Further, in some embodiments of the present invention, an isolation chamber is provided at the top inside 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 inside the isolation chamber. The monitoring method for the immersion energy storage battery box according to the embodiments of the present invention further includes the following two steps:

[0089] (1) When the smoke sensor detects a smoke signal, the battery management system opens the hatch;

[0090] (2) The flame retardant inside the isolation chamber flows into the chamber where the battery module 300 is located inside the battery box 100.

[0091] When the temperature of the battery inside the battery box 100 is too high, thermal runaway will occur, and then phenomena such as 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, so that the flame retardant in the isolation chamber enters the chamber where the battery module 300 is located inside the battery box 100 for fire retardancy.

[0092] The monitoring method for the immersion energy storage battery box according to the embodiments of the present invention can monitor the conditions inside the battery box 100 in real time, realize the temperature management of the battery module 300, and avoid the temperature of the battery module 300 inside the battery box 100 from being too high; at the same time, the sealing performance of the battery box 100 is improved through the sealing ring to avoid oil leakage in the battery box 100; through the external sensor and the internal sensor, the conductivity of the insulating oil can be detected, and the oil leakage state of the battery box 100 can be detected, improving the stability and reliability of the battery box 100.

[0093] On the other hand, the present invention also provides an immersion energy storage battery box, as Figure 2 and Figure 3As shown, an installation frame 200 is provided inside the immersion energy storage battery box. A battery module 300 is provided inside the installation frame 200. A hollow flow channel (not shown in the figure) is provided inside the side wall of the installation frame 200. The battery module 300 includes a plurality of batteries, and each battery is provided with a first temperature sensor. A through hole is formed in the side wall of the battery box 100, and 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 part 410 and a built-in sensor (not shown in the figure) are provided on the side of the circuit board 400 facing the inside of the battery box 100. An outer plug-in part 420 and an external sensor (not shown in the figure) 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 part 410, the inner plug-in part 410 is electrically connected to the outer plug-in part 420, and the outer plug-in part 420 is electrically connected to the battery management system. This immersion energy storage battery box is used to implement the monitoring method of the immersion energy storage battery box described in the above embodiments of the aspect.

[0094] The immersion energy storage battery box according to the embodiment of the present invention can monitor the conditions inside the battery box 100 in real time, realize the temperature management of the battery module 300, and avoid the temperature of the battery module 300 inside the battery box 100 from being too high. At the same time, the sealing performance of the battery box 100 is improved through the sealing ring, avoiding oil leakage in the battery box 100. Through the external sensor and the built-in sensor, the conductivity of the insulating oil can be detected, and the oil leakage state of the battery box 100 can be detected, improving the stability and reliability of the battery box 100.

[0095] On the other hand, the embodiment of the present invention also provides an electronic device, including:

[0096] A memory for storing program instructions;

[0097] A processor for calling the program instructions stored in the memory and executing the monitoring method of the immersion energy storage battery box described in the above embodiments of the aspect according to the obtained program instructions.

[0098] The embodiment of the present application also provides a storage medium, which is a computer-readable storage medium. The storage medium stores a computer program, and when the computer program is executed by a processor, the monitoring method of the above immersion energy storage battery box is realized.

[0099] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely located relative to the processor, and these remote memories can be connected to the processor through a network. Examples of the above networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof. The device embodiments described above are merely illustrative, where the units described as separate components may or may not be physically separated, and may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0100] Those of ordinary skill in the art can understand that all or some of the steps and systems disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or can be implemented as hardware, or can be implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill 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 includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium generally includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0101] The above is a specific description of the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within 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 external sensor is used to detect the oil leakage of the battery box, and an alarm is issued when the battery box leaks oil; The external sensor is a capacitive sensor; the step of detecting the oil leakage state of the battery box by the external sensor includes: 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.

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: 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.

7. 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 4.

8. 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 1-6 according to the obtained program instructions.

9. 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 6.

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