A pre-installed intelligent fire micro-station battery health monitoring system and method

Abstract

The present invention discloses a pre-installed intelligent firefighting microstation battery health monitoring system and method. The system includes an intelligent firefighting microstation, an intelligent substation, and an intelligent management microstation. The EPS emergency power supply in the intelligent substation includes a battery pack. The system uses voltage and current monitoring units to detect the charge and discharge data of each battery cell in real time, identify abnormal battery cells, and calculate their percentage in the battery pack using a score calculation unit. The health assessment unit evaluates and issues early warnings for the battery pack health status based on the load environment and battery temperature. The management method includes: presetting standards and safety ranges, monitoring charge and discharge anomalies, and conducting preliminary and further assessments based on the percentage of abnormal battery cells and environmental factors. If the abnormal percentage exceeds the standard and the environment is abnormal, the load is adjusted or the temperature is lowered before reassessment, providing timely early warnings of potential problems. The present invention can monitor and assess the health status of the battery pack in real time, improve system reliability and safety, and avoid misjudgments and missed detections.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent power management, and in particular relates to a pre-installed intelligent fire fighting micro-station battery health monitoring system and method. Background Art

[0002] With the development of science and technology, micro fire stations have gradually become intelligent, and various intelligent micro fire station management systems have emerged. For example, the Chinese patent CN117788250B specification discloses an intelligent micro fire station management system and method, including an information collection module, a fire station information analysis module, a fire equipment information analysis module, a protective equipment information analysis module, and an early warning terminal. First, the storage environment in each micro fire station is analyzed, and then the feasibility of the storage management of each micro fire station is analyzed. Then, each fire equipment and each protective equipment in each micro fire station is analyzed. When a problem occurs with a certain fire equipment or a certain protective equipment, a timely early warning is issued, which solves the limitations existing in the feasibility analysis process of the current micro fire station management system development, realizes a comprehensive and objective analysis of the feasibility of the micro fire station management system, and provides a reliable basis for the subsequent targeted management and balanced development of the micro fire station management system.

[0003] For example, the specification of Chinese patent CN222363028U discloses an unmanned prefabricated intelligent management micro-station in a tunnel, including a micro-station box with a rectangular structure. This patent adopts the design concept of prefabricated buildings, integrating monitoring, management, and emergency functions. The station-level fire edge computing terminal in the micro-station communicates with the rolling shutter control box, water pump control box, and fire water level monitoring box in real time and sends control signals, which can realize remote monitoring and intelligent inspection; the situation in the micro-station is monitored in real time by high-definition cameras, and the temperature and humidity sensors monitor the temperature and humidity conditions in the micro-station, which can eliminate the on-duty personnel of the original tunnel substation.

[0004] The power distribution and transformation module is an indispensable component of the fire microstation, and the EPS power supply is an important part of the power distribution and transformation module. The EPS power supply is an emergency power supply used in important buildings today for power security and fire safety. It is mainly composed of input and output units, charging modules, battery packs, inverters, monitors, output switching devices and other parts. It is widely used in energy-saving power supply, building lighting, road traffic lighting, tunnel lighting, electricity, industrial and mining enterprises, fire elevators, etc. Its principle is: when the mains power is normal, the mains power is supplied to important loads through the output switching device, and the charger charges or float charges the battery; when the mains power is cut off or the voltage exceeds the power supply range, the controller starts the inverter, and the output switching device immediately switches the mains power supply state to the inverter power supply to provide emergency power supply for the load equipment; when the mains power is restored, the emergency power supply will be restored to the mains power supply.

[0005] However, the EPS emergency power supply is generally activated when the AC power is cut off. Normally, the power supply is in a floating charge state and kept fully charged. However, when the battery is not used for a long time, it is easy to age. Or it is necessary to manually interrupt the AC power input at regular intervals to discharge the battery in the EPS power supply once, and then recharge it with the AC power. This method not only consumes manpower, but also simply activates the battery and cannot evaluate the battery health status. Summary of the Invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the prior art is difficult to effectively evaluate the health status of the EPS emergency power supply, which easily causes major hidden dangers to the normal emergency use of the EPS emergency power supply.

[0007] To solve the above problems, the present invention provides a pre-installed intelligent fire micro-station battery health monitoring system, which includes an intelligent fire micro-station, an intelligent substation and an intelligent management micro-station. The intelligent fire micro-station is connected to a water tank and is used to transport the water in the water tank to the tunnel fire pipe in the event of a fire. The intelligent substation draws power from the power supply network and distributes the power to each power branch switch. The intelligent management micro-station is used to monitor and display the working status of the electrical equipment in the intelligent substation. The intelligent substation includes a high-voltage distribution module, a substation module, a low-voltage distribution module and an EPS emergency power supply. The high-voltage distribution module is connected to the power supply network.

[0008] The EPS emergency power supply includes a battery pack, which includes multiple battery cells;

[0009] The intelligent substation also includes a power health monitoring module, which includes a voltage monitoring unit, a current monitoring unit, a score calculation unit, a load environment monitoring unit, a battery temperature monitoring unit and a health assessment unit. The voltage monitoring unit and the current monitoring unit are used to monitor the charging and discharging of multiple battery cells. The score calculation unit is used to calculate the percentage of battery cells with abnormal charging and discharging in the battery pack. The health assessment unit evaluates and warns the health status of the battery pack based on the percentage of battery cells with abnormal charging and discharging in the battery pack, the load condition and the battery temperature condition.

[0010] A method for monitoring battery health of a pre-installed intelligent fire fighting micro-station, using a pre-installed intelligent fire fighting micro-station management system, includes the following steps:

[0011] S0. Pre-set a corresponding standard range and safety range for the discharge voltage, discharge current, charge voltage, and charge current of the battery pack, and the safety range is larger than the standard range;

[0012] S1. Discharge:

[0013] At predetermined intervals, the output switching device switches the mains power supply state to the EPS emergency power supply to supply power to the load, while monitoring the discharge voltage and current data of each battery cell in the battery pack. When either the discharge voltage or the discharge current deviates from the corresponding standard range but is within the corresponding safety range, it is recorded as an abnormal battery cell A. Based on the percentage of abnormal battery cells A in the battery pack, the following preliminary assessment is performed:

[0014] S1-1. When the percentage of abnormal battery cells A exceeds M%, first collect the load environment monitoring data. If the data is normal, no operation is performed. If the data is abnormal, adjust the load environment temperature. If the percentage of abnormal battery cells A still exceeds M% after the load environment monitoring data is adjusted to normal, no operation is performed. If the percentage of abnormal battery cells A is less than N%, it is determined that the normal load fluctuation caused the battery discharge abnormality, and no battery warning is issued.

[0015] S1-2. When the percentage of abnormal battery cells A is lower than N%, where 0<N<M<100, the battery pack is judged to be in normal health;

[0016] S1-3: When the percentage of abnormal battery cells A is between N% and M%, no assessment is performed;

[0017] S2. Charging:

[0018] After the preset discharge time, the mains is switched back on to power the load while the battery pack is charged. The charging voltage and current of each battery cell are monitored. If either the charging voltage or the charging current deviates from the corresponding standard range but is within the corresponding safety range, it is recorded as an abnormal battery cell B. The percentage of abnormal battery cells B in the battery pack is also calculated.

[0019] S2-1, for the situation in step S1-1:

[0020] When the percentage of abnormal battery cells B is lower than N%, it is determined that the load fault has caused abnormal battery discharge, the battery pack is in normal health, and a load warning is issued;

[0021] When the percentage of abnormal battery cells B exceeds M%, battery temperature data is collected. If it is within the normal range, it is determined that the battery pack is charging and discharging abnormally, and a moderate battery health warning is issued;

[0022] Conversely, when the battery temperature data exceeds the normal range, the battery pack is first cooled. After the battery temperature data is cooled back to the normal range, the charging status of the battery cells is continuously monitored. When the percentage of abnormal battery cells B is lower than N%, it is determined that the battery is abnormally overheating and a battery overheating warning is issued. If the percentage of abnormal battery cells B still exceeds M%, a severe battery health warning is issued and the battery temperature data is monitored in real time. If the temperature is in an abnormally rising state, a danger warning is issued and the battery charging process is shut down.

[0023] S2-2, for the situation in step S1-3:

[0024] When abnormal battery cell A is also recorded as abnormal battery cell B, it is recorded as a key battery cell. When the percentage of key battery cells in the battery pack is lower than N%, the battery pack health status is judged to be normal. When it exceeds N%, a mild battery health warning is issued.

[0025] As another improvement of the present application, the battery pack includes a box body and a battery pack installed inside the box body, the outer end of the battery pack is provided with a main monitoring box, the interior of the main monitoring box is filled with heat transfer fluid, the inner wall of the main monitoring box is fixedly connected to a temperature sensor immersed in the heat transfer fluid, both sides of the box body are fixedly connected to a connecting pipe, the end of the connecting pipe close to the box body is fixedly connected to a hose, the end of the hose away from the connecting pipe is threadedly connected to the lower end of the main monitoring box, the end of the connecting pipe away from the box body is fixedly connected to a port of a water pump through a pipe, and the other port of the water pump is connected to the water tank.

[0026] As another improved supplement to the present application, the battery pack includes multiple battery cells and multiple mounting plates sleeved on the upper and lower ends of the battery cells. Multiple circular holes are opened on the main monitoring box, and the multiple battery cells are respectively inserted into the multiple circular holes, and the two are tightly fitted. Multiple heat-conducting tubes are fixedly connected to the inner wall of the main monitoring box, and the multiple heat-conducting tubes correspond one-to-one to the multiple circular holes, and the inner diameter of the heat-conducting tubes is the same as the inner diameter of the circular holes. The heat-conducting liquid is filled between the heat-conducting tubes and the inner wall of the main monitoring box.

[0027] As another improved supplement of the present application, a pair of threaded holes communicating with the interior of the main monitoring box is provided at the lower end thereof, and a pair of hoses are respectively threadedly connected to the pair of threaded holes.

[0028] As another improved supplement of the present application, the upper end of the box body is connected to a box cover via a fastener.

[0029] As another improvement of the present application, the battery pack also includes a secondary monitoring box located on the upper side of the main monitoring box, the secondary monitoring box includes an annular plate mounted on the outside of the battery cell, an annular cavity is opened inside the annular plate, an elastic membrane and an air pressure sensor are fixedly connected to the inner wall of the annular cavity, and the air pressure sensor is located on the lower side of the elastic membrane, an annular piston is slidably connected to the inside of the annular cavity, and the annular piston is located on the lower side of the air pressure sensor.

[0030] As another improvement supplement to the present application, a pair of square holes communicating with the annular cavity are opened at the lower end of the annular plate, and a pair of rectangular holes corresponding to the positions of the square holes are opened at the upper end of the main monitoring box. A diaphragm is provided at the opening of the rectangular hole, and the edge end of the diaphragm is fixedly connected to the inner wall of the main monitoring box.

[0031] As a supplement to another improvement of the present application, an expansion body is fixedly connected to the outer surface of the heat-conducting tube, and the expansion body is made of a thermally expanding and contracting material.

[0032] As a supplement to another improvement of the present application, the lower end surface of the annular plate and the upper end surface of the main monitoring box are both coated with a magnetic coating.

[0033] To sum up, this application uses intelligent management microstations, intelligent substations and intelligent fire protection microstations to replace traditional building-type substations, cancels the construction of tunnel substation buildings, adopts prefabricated building design ideas, and builds tunnel intelligent management microstations that integrate monitoring, management, emergency and other functions in the form of prefabricated cabins. It has the advantages of saving construction costs, shortening construction period, reducing operating costs, and reducing construction difficulty. In addition, for the EPS emergency power supply of the intelligent substation, the charging and discharging process is carried out regularly, and the charging and discharging voltage and current of the battery cells are monitored. According to the percentage of abnormally charged and discharged battery cells in the battery pack, the load conditions of the power being supplied, and the battery temperature conditions, the health status of the battery pack is evaluated and warned, and the performance health status of the EPS emergency power supply is discovered in time, effectively reducing the safety hazards of the EPS emergency power supply in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a distribution diagram of the first embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of the internal structure of the intelligent management micro station according to the first embodiment of the present application;

[0036] Figure 3 This is a schematic diagram of the internal structure of the intelligent fire fighting micro station according to the first embodiment of the present application;

[0037] Figure 4 This is a partial system block diagram of the first embodiment of this application;

[0038] Figure 5The three-dimensional battery pack of the second and third embodiments of this application Figure 1 ;

[0039] Figure 6 The three-dimensional battery pack of the second and third embodiments of this application Figure 2 ;

[0040] Figure 7 This is a perspective view of the battery pack according to the second and third embodiments of the present application before installation;

[0041] Figure 8 This is a schematic diagram of the front structure of the main monitoring box in the second and third implementation modes of this application;

[0042] Figure 9 This is a schematic diagram of the front structure of the main monitoring box during installation in the second and third implementation modes of this application. Figure 1 ;

[0043] Figure 10 This is a schematic diagram of the front structure of the main monitoring box during installation in the second and third implementation modes of this application. Figure 2 ;

[0044] Figure 11 This is a front structural diagram of the auxiliary monitoring box of the second and third embodiments of this application;

[0045] Figure 12 This is a schematic diagram of the front structure of the auxiliary monitoring box of the second and third embodiments of this application during installation;

[0046] Figure 13 This is a schematic diagram of the front structure of the main monitoring box and the auxiliary monitoring box after installation in the second and third implementation modes of this application;

[0047] Figure 14 Schematic diagram of the top surface structure of the main monitoring box in the second and third implementation modes of this application Figure 1 ;

[0048] Figure 15 Schematic diagram of the top structure of the main monitoring box in the second and third implementation modes of this application Figure 2 ;

[0049] Figure 16 This is a front structural diagram of the main monitoring box and the auxiliary monitoring box in the second and third embodiments of the present application when in use;

[0050] Figure 17 The three-dimensional battery pack of the second and third embodiments of this application Figure 3 .

[0051] In the picture:

[0052] 1-box body, 2-box cover, 3-battery pack, 31-battery cell, 32-mounting plate, 4-auxiliary monitoring box, 41-annular plate, 4101-annular cavity, 4102-square hole, 4103-air hole, 42-elastic membrane, 43-annular piston, 44-air pressure sensor, 5-main monitoring box, 501-round hole, 502-rectangular hole, 503-threaded hole, 6-heat conducting tube, 601-expansion body, 7-diaphragm, 8-hose, 9-connecting pipe, 10-pipeline. DETAILED DESCRIPTION

[0053] The following describes three implementation methods of the present application in detail with reference to the accompanying drawings.

[0054] The first implementation method:

[0055] This invention provides a pre-installed intelligent fire station battery health monitoring system, please refer to Figure 1 , including intelligent fire fighting micro station, intelligent substation and intelligent management micro station. The intelligent fire fighting micro station is connected to a water tank, such as Figure 3 As shown in the figure, the intelligent fire fighting micro station mainly consists of a container body, a fire water supply pump group, an intelligent control cabinet, air conditioning, lighting, etc., and is used to transport the water source in the water tank to the tunnel fire fighting pipeline in the event of a fire; the intelligent substation draws power from the power supply network and distributes the power to each power branch switch; Figure 2 As shown, the intelligent management microstation is equipped with a server, a computer terminal with a visual interface, etc., which are used to monitor and display the working status of electrical equipment in the intelligent substation.

[0056] The intelligent substation includes a high-voltage distribution module, a substation module, a low-voltage distribution module and an EPS emergency power supply. The high-voltage distribution module is connected to the power supply network and can introduce 10KV power from the power supply network. The substation module converts the high-voltage power output by the high-voltage distribution cabinet into a low-voltage power supply and outputs it to the low-voltage distribution module. The low-voltage distribution module is used to distribute the low-voltage power output by the transformer to different electrical equipment. The EPS emergency power supply is used to provide emergency power for primary load power supply equipment such as accident lighting and fire-fighting facilities in an emergency state.

[0057] The EPS emergency power supply includes a battery pack, which includes multiple battery cells;

[0058] See also Figure 4The intelligent substation also includes a power health monitoring module, which includes a voltage monitoring unit, a current monitoring unit, a score calculation unit, a load environment monitoring unit, a battery temperature monitoring unit and a health assessment unit. The voltage monitoring unit and the current monitoring unit are used to monitor the charging and discharging of multiple battery cells. The score calculation unit is used to calculate the percentage of battery cells with abnormal charging and discharging in the battery pack. The health assessment unit evaluates and warns the health status of the battery pack based on the percentage of battery cells with abnormal charging and discharging in the battery pack, the load condition and the battery temperature condition.

[0059] A method for monitoring the battery health of a pre-installed intelligent fire fighting micro-station is provided, which is managed by a pre-installed intelligent fire fighting micro-station management system and includes the following steps:

[0060] S0. Pre-set a corresponding standard range and safety range for the discharge voltage, discharge current, charge voltage, and charge current of the battery pack, and the safety range is larger than the standard range;

[0061] If the standard range of charging voltage is set to ab and the safety range is set to ef, then e<a<b<f. The specific values ​​are set by those skilled in the art according to the battery model, parameters, usage requirements, etc.

[0062] S1. Discharge:

[0063] At predetermined intervals (e.g., every 24 hours), the output switching device switches the mains power supply state to the EPS emergency power supply to supply power to the load, while monitoring the discharge voltage and current data of each battery cell in the battery pack. When either the discharge voltage or the discharge current deviates from the corresponding standard range but is within the corresponding safety range, it is recorded as an abnormal battery cell A. Based on the percentage of abnormal battery cells A in the battery pack, the following preliminary assessment is performed:

[0064] S1-1. When the percentage of abnormal battery cells A exceeds M%, first collect load environment monitoring data. This operation is based on the following: If the percentage of abnormal battery cells A exceeds M%, it means that a large number of battery cells have abnormal discharge. In actual situations, the probability of most battery cells failing at the same time is low. In this case, the discharge abnormality may be caused by load fluctuations (such as load power changes). Therefore, first perform the following preliminary assessment based on the load environment monitoring data;

[0065] If the data is normal, no operation is performed. If the data is abnormal, the load environment temperature is adjusted. If the percentage of abnormal battery cells A still exceeds M% after the load environment monitoring data is adjusted to normal, no operation is performed. If the percentage of abnormal battery cells A is lower than N%, it is determined that the battery discharge is abnormal due to normal load fluctuation (normal load fluctuation here refers to the load's own operation being temporarily affected by environmental factors), and no battery warning is issued.

[0066] Supplementary explanation: The load refers to the electrical equipment. The environment where the electrical equipment is located is equipped with temperature sensors and circulating refrigeration equipment. The temperature sensors monitor the ambient temperature of the electrical equipment, thereby obtaining load environment monitoring data. The circulating refrigeration equipment (such as air conditioning) can adjust the temperature of the load environment when needed.

[0067] S1-2. When the percentage of abnormal battery cells A is lower than N%, where 0<N<M<100, the battery pack is judged to be in normal health and no warning is required, e.g., N is 10 and M is 70;

[0068] S1-3: When the percentage of abnormal battery cells A is between N% and M%, no assessment is performed;

[0069] S2. Charging:

[0070] After a predetermined discharge time (e.g., 10 minutes), the system switches back to mains power, allowing the load to be powered by the mains while simultaneously charging the battery pack. The charging voltage and current of each battery cell are monitored. If either the charging voltage or current deviates from the corresponding standard range but is within the corresponding safety range, it is marked as an abnormal battery cell B. Similarly, the percentage of abnormal battery cells B in the battery pack is calculated.

[0071] S2-1, for the situation in step S1-1:

[0072] When the percentage of abnormal battery cells B is lower than N%, indicating that the battery is charging normally, it is determined that the load fault caused the abnormal battery discharge, and the battery pack is in normal health, and a load warning is issued;

[0073] When the percentage of abnormal battery cells B exceeds M%, battery temperature data is collected. If it is within the normal range, it is determined that the battery pack has abnormal charge and discharge. Combined with the discharge situation in step S1-1, if more than M% of battery cells have both discharge and charge abnormalities, it indicates that the performance of the battery cells exceeding M% has degraded. To ensure the normal use of the battery pack in the future, a moderate battery health warning is issued;

[0074] Conversely, when the battery temperature data exceeds the normal range, the battery pack is first cooled. After the battery temperature data is cooled back to the normal range, the charging status of the battery cells is continuously monitored. When the percentage of abnormal battery cells B is lower than N%, it is determined that the battery is abnormally overheating and a battery overheating warning is issued. If the percentage of abnormal battery cells B still exceeds M%, a severe battery health warning is issued and the battery temperature data is monitored in real time. If the temperature is in an abnormally rising state, a danger warning is issued and the battery charging process is shut down.

[0075] Supplementary Note: In this embodiment, a temperature sensor may be used to monitor the temperature of the battery pack, and an air cooling structure may be provided to achieve the cooling process of the battery pack in step S2-1.

[0076] S2-2, for the situation in step S1-3:

[0077] When abnormal battery cell A is also recorded as abnormal battery cell B, it is recorded as a key battery cell. When the percentage of key battery cells in the battery pack is lower than N%, the battery pack health status is judged to be normal. When it exceeds N%, a mild battery health warning is issued.

[0078] The above-mentioned pre-installed intelligent fire micro station management method also includes the following steps: Step S3, during the battery charging and discharging process, when the charging voltage, current or discharging voltage, current of the battery cell is monitored to deviate from the corresponding safety range, it indicates that the battery cell is in a dangerous charging and discharging state, and the battery may be damaged. At this time, a severe battery health warning is directly issued, and the ongoing charging or discharging process is shut down.

[0079] Supplementary explanation: When a certain voltage or current data exceeds the corresponding standard range but is within the corresponding safety range, it indicates that the performance of the battery has declined. In actual situations, there will be more or less differences between the multiple single cells in the battery pack. After the battery has been used for a period of time, its performance is reduced compared to the initial state. This is also normal. In this application, if it is lower than N%, it means that the performance of a very small number of battery cells has declined, and the entire battery pack can still work normally, so there is no need for warning at the moment.

[0080] Second implementation method:

[0081] This embodiment makes the following specific settings for monitoring the battery pack temperature condition, and the rest of the contents are consistent with the first embodiment: Figure 5 and Figure 6 The battery pack includes a box body 1 and a battery pack 3 installed inside the box body 1. The outer end of the battery pack 3 is provided with a main monitoring box 5. When in use, the interior of the main monitoring box 5 is filled with a heat transfer fluid (combined with Figure 13As shown), the inner wall of the main monitoring box 5 is fixedly connected with a temperature sensor immersed in the thermal fluid (not shown in the figure), please refer to Figure 9 , both sides of the box body 1 are fixedly connected with a pipe 9, the end of the pipe 9 close to the box body 1 is fixedly connected with a hose 8, and the end of the hose 8 away from the pipe 9 is threadedly connected to the lower end of the main monitoring box 5, which is convenient for the installation and removal of the main monitoring box 5. At the same time, after the main monitoring box 5 is installed, Figure 10 As shown, outside the box body 1, a heat transfer liquid is conveniently injected into the main monitoring box 5 through a connecting pipe 9, and the heat transfer liquid can be water.

[0082] See also Figure 6 and Figure 7 The battery pack 3 includes a plurality of battery cells 31 and a plurality of mounting plates 32 sleeved on the upper and lower ends of the battery cells 31. The electrodes at both ends of the battery cells 31 are exposed to the outside through the mounting plates 32, which facilitates the electrical connection of the plurality of battery cells 31 through conductive connecting strips. This is an existing battery pack installation technology;

[0083] See also Figure 7 and Figure 8 The main monitoring box 5 is provided with a plurality of circular holes 501, and the plurality of battery cells 31 are respectively inserted into the interior of the plurality of circular holes 501, and the two are tightly fitted. The inner wall of the main monitoring box 5 is fixedly connected with a plurality of heat-conducting tubes 6, and the heat-conducting tubes 6 are made of insulating materials with high thermal conductivity. The plurality of heat-conducting tubes 6 correspond to the plurality of circular holes 501 one by one, and the inner diameter of the heat-conducting tubes 6 is the same as the inner diameter of the circular holes 501. The heat-conducting liquid is filled between the heat-conducting tubes 6 and the inner wall of the main monitoring box 5, and the heat-conducting liquid is filled between the heat-conducting tubes 6 and the inner wall of the main monitoring box 5. Figure 9 As shown, when installing the main monitoring box 5, the main monitoring box 5 is first placed on the outside of the battery cell 31, and then the mounting plates 32 are installed at both ends of the battery cell 31. Multiple battery cells 31 are respectively penetrated by multiple circular holes 501. The outer ends of the battery cells 31 are in contact with the heat-conducting tube 6, and the heat generated by charging or discharging is transferred to the heat-conducting tube 6. The heat-conducting tube 6 transfers the heat to the heat-conducting fluid to heat it up. The temperature of the heat-conducting fluid is monitored by a temperature sensor, and the temperature condition of the battery pack 3 is indirectly obtained.

[0084] In the first embodiment, a temperature sensor is used to obtain the battery temperature. Generally, the temperature sensor is directly installed in the battery box. However, due to the low gas fluidity inside the battery box, the heat of the densely arranged battery cells is difficult to dissipate quickly and is easily accumulated between adjacent battery cells. Therefore, the accuracy of battery temperature monitoring is insufficient. If multiple temperature sensors are used for multi-point monitoring, this embodiment uses the main monitoring box 5, heat transfer tube 6, heat transfer liquid and other structures to coordinate the temperature of each battery cell 31 to the heat transfer liquid in time, so as to obtain the overall heating condition of the battery. Compared with the first embodiment, it has more sufficient accuracy, but it also increases the material cost of the main monitoring box 5 and its related structures. Therefore, those skilled in the art can selectively implement it according to monitoring needs.

[0085] And, combined with Figure 13 As shown, one end of the connecting pipe 9 away from the box body 1 is fixedly connected to a port of a water pump through a pipe 10, and the other port of the water pump is connected to the water tank. After the heat transfer liquid (i.e., water) is injected, the connecting pipe 9 is connected to the water pump. When necessary (such as cooling the battery pack in step S2-1), by starting a pair of water pumps, one water pump inputs the water source in the water tank into the main monitoring box 5, and the other water pump extracts the water in the main monitoring box 5 and transports it to the water tank, the water in the main monitoring box 5 can be replaced, and the battery pack 3 can be cooled by using the water in the water tank (supplementary note: compared with the main monitoring box 5, the water tank is huge in size and has a large amount of water. Therefore, discharging and discharging water in the same water tank is not likely to affect the obvious change of the water temperature in the water tank, and the battery pack 3 can be effectively cooled).

[0086] A pair of threaded holes 503 communicating with the interior of the main monitoring box 5 are formed at the lower end thereof, a pair of hoses 8 are threadedly connected to the pair of threaded holes 503 respectively, and the upper end of the box body 1 is connected to the box cover 2 via fasteners.

[0087] The third implementation method:

[0088] This implementation method adds the following content based on the second implementation method: Figure 6 and Figure 7 The battery pack also includes a secondary monitoring box 4 located on the upper side of the main monitoring box 5. The secondary monitoring box 4 includes an annular plate 41 sleeved on the outer side of the battery cell 31. Figure 11 As shown, an annular cavity 4101 is provided inside the annular plate 41, and an elastic membrane 42 and an air pressure sensor 44 are fixedly connected to the inner wall of the annular cavity 4101, and the air pressure sensor 44 is located on the lower side of the elastic membrane 42. An annular piston 43 is slidably connected to the inside of the annular cavity 4101, and the annular piston 43 is located on the lower side of the air pressure sensor 44. A pair of square holes 4102 communicating with the annular cavity 4101 are provided at the lower end of the annular plate 41, and a pair of rectangular holes 502 corresponding to the positions of the square holes 4102 are provided at the upper end of the main monitoring box 5. A diaphragm 7 is provided at the orifice of the rectangular hole 502, and the diaphragm 7 is made of a flexible, waterproof and airtight material. The edge end of the diaphragm 7 is fixedly connected to the inner wall of the main monitoring box 5. The lower end surface of the annular plate 41 and the upper end surface of the main monitoring box 5 are both coated with a magnetic coating. Figure 12 As shown, during installation, the auxiliary monitoring box 4 is placed on the upper end of the main monitoring box 5, and the two are tightly fitted through the magnetic coating. At this time, the square hole 4102 and the rectangular hole 502 are connected, and since the annular piston 43 is annular and the square hole 4102 is bar-shaped, the annular piston 43 is not easy to fall out of the annular cavity 4101.

[0089] See also Figure 14The outer surface of the heat-conducting tube 6 is fixedly connected with an expansion body 601, and the expansion body 601 is made of a thermal expansion and contraction material, such as thermal expansion rubber.

[0090] In the second embodiment, the battery heating status is obtained by cooperating with the main monitoring box 5, the heat conducting cylinder 6, the heat conducting fluid and other structures, which improves the accuracy of battery temperature monitoring to a certain extent. However, due to the limited fluidity of the heat conducting fluid, the monitoring data of the temperature sensor still has a certain error. Therefore, this embodiment further improves the accuracy of battery temperature monitoring by setting the expansion body 601, the auxiliary monitoring box 4 and the diaphragm 7: Figure 15 As shown, when part of the battery core 31 is seriously heated, the battery core 31 transfers heat to the heat-conducting tube 6 by contact transfer, and the heat-conducting tube 6 transfers heat to the expansion body 601 and the surrounding heat-conducting fluid. The expansion body 601 expands thermally and increases in volume, occupying the internal space of the main monitoring box 5, thereby causing the heat-conducting fluid to squeeze the diaphragm 7, as shown in FIG. Figure 16 As shown, the heat-conducting fluid pushes the diaphragm 7 to pass through the rectangular hole 502 and the square hole 4102 and enter the annular cavity 4101. At this time, the air pressure in the lower area of ​​the annular piston 43 increases, causing the annular piston 43 to move upward, and the air pressure between the elastic membrane 42 and the annular piston 43 increases. The elastic membrane 42 expands, and the air pressure data monitored by the air pressure sensor 44 increases. Therefore, the data change of the air pressure sensor 44 indirectly reflects the heating condition of the battery cell 31. In step S2-1, if the monitoring data of the temperature sensor inside the main monitoring box 5 is normal, but the monitoring data of the air pressure sensor 44 reaches the preset maximum threshold, it also indicates that the battery temperature is abnormal, and the battery pack needs to be cooled until the data of the air pressure sensor 44 returns to the set normal range; however, this embodiment also increases the material cost of the auxiliary monitoring box 4 and its related structures, so those skilled in the art can selectively implement it according to monitoring needs.

[0091] An air hole 4103 communicating with the annular cavity 4101 is provided at the upper end of the annular plate 41. When the elastic membrane 42 is deformed, the air hole 4103 facilitates the flow of gas between the inside of the annular cavity 4101 and the inside of the box body 1, so that the air pressure in the upper area of ​​the elastic membrane 42 remains stable. An exhaust pipe with an elastic one-way valve is fixedly connected to the outer end of the box body 1. The exhaust pipe is connected to the inside of the box body 1. The gas flow direction of the elastic one-way valve is from the inside of the box body 1 to the outside, which facilitates pressure relief inside the box body 1.

[0092] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A pre-installed intelligent firefighting microstation battery health monitoring system, comprising an intelligent firefighting microstation, an intelligent substation, and an intelligent management microstation. The intelligent firefighting microstation is connected to a water tank and is used to transport water from the water tank to the tunnel firefighting pipe in the event of a fire. The intelligent substation draws power from the power supply network and distributes the power to each power branch switch. The intelligent management microstation is used to monitor and display the operating status of electrical equipment within the intelligent substation. The intelligent substation includes a high-voltage distribution module, a substation module, a low-voltage distribution module, and an EPS emergency power supply. The high-voltage distribution module is connected to the power supply network. The system is characterized by: The EPS emergency power supply includes a battery pack, which includes multiple battery cells; the intelligent substation also includes a power health monitoring module, which includes a voltage monitoring unit, a current monitoring unit, a score calculation unit, a load environment monitoring unit, a battery temperature monitoring unit, and a health assessment unit. The voltage monitoring unit and the current monitoring unit are used to monitor the charging and discharging of the multiple battery cells. The score calculation unit is used to calculate the percentage of battery cells with abnormal charging and discharging in the battery pack. The health assessment unit evaluates and issues an early warning on the health status of the battery pack based on the percentage of battery cells with abnormal charging and discharging in the battery pack, the load condition, and the battery temperature condition. The health assessment unit pre-sets corresponding standard ranges and safety ranges for the discharge voltage, discharge current, charge voltage, and charge current of the battery pack, and the safety range is greater than the standard range; During the discharge process, the system switches to the EPS emergency power supply at predetermined intervals, and monitors the discharge voltage and current data of each battery cell. If the discharge voltage or discharge current deviates from the standard range but is within the safe range, it is recorded as an abnormal battery cell A, and a preliminary assessment is performed based on the percentage of abnormal battery cells A: When the percentage of abnormal battery cells A exceeds M%, the load environment monitoring data is collected. If the data is normal, no operation is performed. If the data is abnormal, the load environment temperature is adjusted. After adjustment, if the percentage of abnormal battery cells A still exceeds M%, no operation is performed. If the percentage of abnormal battery cells A is less than N%, it is determined that the normal load fluctuation has caused abnormal battery discharge, and no battery warning is issued. When the percentage of abnormal battery cells A is lower than N%, where 0<N<M<100, the battery pack is judged to be in normal health; When the percentage of abnormal battery cells A is between N% and M%, no assessment is performed; During the charging process, after a predetermined discharge time, the system switches back to mains power supply while charging the battery pack. The charging voltage and current data of the battery cells are monitored. If the charging voltage or charging current deviates from the standard range but is within the safe range, it is recorded as an abnormal battery cell B and its percentage is calculated. For the situation where the percentage of abnormal battery cells A exceeds M%, when the percentage of abnormal battery cells B is lower than N%, it is determined that the load fault has caused abnormal battery discharge, the battery pack is in normal health, and a load warning is issued; when the percentage of abnormal battery cells B exceeds M%, battery temperature data is collected. If it is within the normal range, it is determined that the battery pack is charging and discharging abnormally, and a moderate battery health warning is issued; when the battery temperature data exceeds the normal range, the battery pack is first cooled. After cooling, if the percentage of abnormal battery cells B is lower than N%, it is determined that the battery is overheating abnormally, and a battery overheating warning is issued. If the percentage of abnormal battery cells B still exceeds M%, a severe battery health warning is issued, and the battery temperature data is monitored in real time. If it is in an abnormally rising state, a danger warning is issued and the battery charging process is shut down; For the case where the percentage of abnormal battery cells A is between N% and M%: when abnormal battery cells A are also recorded as abnormal battery cells B, they are recorded as key battery cells. When the percentage of key battery cells is lower than N%, the battery pack health status is judged to be normal. When it exceeds N%, a mild battery health warning is issued.

2. The pre-installed intelligent fire fighting micro-station battery health monitoring system according to claim 1 is characterized by: The battery pack comprises a box body (1) and a battery pack (3) installed inside the box body (1); a main monitoring box (5) is provided on the outer end of the battery pack (3); the interior of the main monitoring box (5) is filled with a heat transfer fluid; an inner wall of the main monitoring box (5) is fixedly connected to a temperature sensor immersed in the heat transfer fluid; both sides of the box body (1) are fixedly connected to a connecting pipe (9); an end of the connecting pipe (9) close to the box body (1) is fixedly connected to a hose (8); an end of the hose (8) away from the connecting pipe (9) is threadedly connected to the lower end of the main monitoring box (5); an end of the connecting pipe (9) away from the box body (1) is fixedly connected to a port of a water pump through a pipe (10); and the other port of the water pump is connected to the water tank.

3. The pre-installed intelligent fire fighting micro-station battery health monitoring system according to claim 2 is characterized by: The battery pack (3) includes a plurality of battery cells (31) and a plurality of mounting plates (32) sleeved on the upper and lower ends of the battery cells (31). The main monitoring box (5) is provided with a plurality of circular holes (501). The plurality of battery cells (31) are respectively inserted into the plurality of circular holes (501), and the two are tightly fitted. The inner wall of the main monitoring box (5) is fixedly connected with a plurality of heat-conducting tubes (6). The plurality of heat-conducting tubes (6) correspond to the plurality of circular holes (501) one by one, and the inner diameter of the heat-conducting tubes (6) is the same as the inner diameter of the circular holes (501). The heat-conducting liquid is filled between the heat-conducting tubes (6) and the inner wall of the main monitoring box (5).

4. The pre-installed intelligent fire fighting micro-station battery health monitoring system according to claim 2 is characterized by: A pair of threaded holes (503) communicating with the interior of the main monitoring box (5) are provided at the lower end thereof, and the hose (8) is threadably connected to the threaded holes (503).

5. The pre-installed intelligent fire fighting micro-station battery health monitoring system according to claim 2 is characterized by: The upper end of the box body (1) is connected to a box cover (2) via a fastener.

6. The pre-installed intelligent fire fighting micro-station battery health monitoring system according to claim 2 is characterized by: The battery pack further comprises a secondary monitoring box (4) located on the upper side of the main monitoring box (5), the secondary monitoring box (4) comprising an annular plate (41) sleeved on the outer side of the battery cell (31), an annular cavity (4101) being provided inside the annular plate (41), an elastic membrane (42) and an air pressure sensor (44) being fixedly connected to the inner wall of the annular cavity (4101), the air pressure sensor (44) being located on the lower side of the elastic membrane (42), an annular piston (43) being slidably connected to the interior of the annular cavity (4101), the annular piston (43) being located on the lower side of the air pressure sensor (44).

7. The pre-installed intelligent fire fighting micro-station battery health monitoring system according to claim 6 is characterized by: A pair of square holes (4102) communicating with the annular cavity (4101) are formed at the lower end of the annular plate (41), and a pair of rectangular holes (502) corresponding to the positions of the square holes (4102) are formed at the upper end of the main monitoring box (5). A diaphragm (7) is provided at the opening of the rectangular hole (502), and the edge of the diaphragm (7) is fixedly connected to the inner wall of the main monitoring box (5).

8. The pre-installed intelligent fire fighting micro-station battery health monitoring system according to claim 3 is characterized by: An expansion body (601) is fixedly connected to the outer surface of the heat-conducting cylinder (6), and the expansion body (601) is made of a thermally expanding and contracting material.

9. The pre-installed intelligent fire fighting micro-station battery health monitoring system according to claim 6, characterized in that: The lower end surface of the annular plate (41) and the upper end surface of the main monitoring box (5) are both coated with a magnetic coating.

10. A method for monitoring battery health of a pre-installed intelligent fire fighting micro-station, using the pre-installed intelligent fire fighting micro-station battery health monitoring system according to claim 1, characterized in that: The following steps are involved: S0. Pre-set a corresponding standard range and safety range for the discharge voltage, discharge current, charge voltage, and charge current of the battery pack, and the safety range is larger than the standard range; S1. Discharge: At predetermined intervals, the output switching device switches the mains power supply state to the EPS emergency power supply to supply power to the load, while monitoring the discharge voltage and current data of each battery cell in the battery pack. When either the discharge voltage or the discharge current deviates from the corresponding standard range but is within the corresponding safety range, it is recorded as an abnormal battery cell A. Based on the percentage of abnormal battery cells A in the battery pack, the following preliminary assessment is performed: S1-1. When the percentage of abnormal battery cells A exceeds M%, first collect the load environment monitoring data. If the data is normal, no operation is performed. If the data is abnormal, adjust the load environment temperature. If the percentage of abnormal battery cells A still exceeds M% after the load environment monitoring data is adjusted to normal, no operation is performed. If the percentage of abnormal battery cells A is less than N%, it is determined that the normal load fluctuation caused the battery discharge abnormality, and no battery warning is issued. S1-2. When the percentage of abnormal battery cells A is lower than N%, where 0<N<M<100, the battery pack is judged to be in normal health; S1-3: When the percentage of abnormal battery cells A is between N% and M%, no assessment is performed; S2. Charging: After the preset discharge time, the mains is switched back on to power the load while the battery pack is charged. The charging voltage and current of each battery cell are monitored. If either the charging voltage or the charging current deviates from the corresponding standard range but is within the corresponding safety range, it is recorded as an abnormal battery cell B. The percentage of abnormal battery cells B in the battery pack is also calculated. S2-1, for the situation in step S1-1: When the percentage of abnormal battery cells B is lower than N%, it is determined that the load fault has caused abnormal battery discharge, the battery pack is in normal health, and a load warning is issued; When the percentage of abnormal battery cells B exceeds M%, battery temperature data is collected. If it is within the normal range, it is determined that the battery pack is charging and discharging abnormally, and a moderate battery health warning is issued; Conversely, when the battery temperature data exceeds the normal range, the battery pack is first cooled. After the battery temperature data is cooled back to the normal range, the charging status of the battery cells is continuously monitored. When the percentage of abnormal battery cells B is lower than N%, it is determined that the battery is abnormally overheating and a battery overheating warning is issued. If the percentage of abnormal battery cells B still exceeds M%, a severe battery health warning is issued and the battery temperature data is monitored in real time. If the temperature is in an abnormally rising state, a danger warning is issued and the battery charging process is shut down. S2-2, for the situation in step S1-3: When abnormal battery cell A is also recorded as abnormal battery cell B, it is recorded as a key battery cell. When the percentage of key battery cells in the battery pack is lower than N%, the battery pack health status is judged to be normal. When it exceeds N%, a mild battery health warning is issued.

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