Preassembled intelligent fire-fighting micro-station battery health monitoring system and method

Abstract

The invention discloses a preassembled intelligent fire-fighting micro-station battery health monitoring system and method.The system comprises an intelligent fire-fighting micro-station, an intelligent power transformation micro-station and an intelligent management micro-station, an EPS emergency power supply in the intelligent power transformation micro-station comprises a storage battery pack, and the system detects charging and discharging data of each single battery in real time through a voltage and current monitoring unit; an abnormal single battery is recognized, the percentage of the abnormal single battery in the storage battery pack is calculated by a score calculation unit, and a health evaluation unit evaluates and early warns the health state of the storage battery pack in combination with the load environment and the battery temperature; the management method comprises the following steps: presetting a standard and a safety range, monitoring charging and discharging abnormity, and performing preliminary and further evaluation according to the percentage of abnormal single batteries and environmental factors; if the abnormal percentage exceeds the standard and the environment is abnormal, the load is adjusted or evaluation is carried out again after cooling, and potential problems are early warned in time. The health state of the storage battery pack can be monitored and evaluated in real time, the reliability and safety of the system are improved, and misjudgment and missed judgment are avoided.

Description

Technical Field

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

[0002] With the development of technology, micro fire stations have gradually become intelligent, and various intelligent micro fire station management systems have emerged. For example, the specification of Chinese Patent CN117788250B discloses an intelligent micro fire station management system and method, including an information collection module, a fire station information analysis module, a fire fighting equipment information analysis module, a protective equipment information analysis module, and a warning terminal. First, by analyzing the storage environment in each micro fire station, the feasibility of storage management in each micro fire station is analyzed, and then each fire fighting equipment and each protective equipment in each micro fire station are analyzed. When a problem occurs with a certain fire fighting equipment or a certain protective equipment, a warning is given in a timely manner, solving the limitation problems existing in the development feasibility analysis process of the current micro fire station management system, realizing the comprehensive and objective analysis of the feasibility of the micro fire station management system, and providing a reliable basis for the targeted management and balanced development of the subsequent micro fire station management system.

[0003] Another example is that the specification of Chinese Patent CN222363028U discloses a prefabricated intelligent management micro-station for unattended tunnels, including a micro-station box body in a cuboid structure. This patent adopts the design idea of prefabricated buildings, integrating monitoring, management, and emergency functions. Through the station-level fire edge computing terminal in the micro-station, real-time communication with and sending control signals to the rolling door control box, water pump control box, and fire water level monitoring box can achieve remote monitoring and intelligent patrol; through a high-definition camera, the situation inside the micro-station is monitored in real time, and a temperature and humidity sensor monitors the temperature and humidity inside the micro-station, and the original tunnel substation attendants can be cancelled.

[0004] The power distribution and transformation module is an essential part of the fire micro-station, 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 adopted in important buildings today for power guarantee and fire safety. It mainly consists of input and output units, charging modules, battery packs, inverters, monitors, output switching devices, etc., and 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 supplies important loads through the output switching device, and at the same time, the charger charges or floats the storage battery; when the mains power is cut off or the voltage exceeds the supply range, the controller starts the inverter, and at the same time, 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 resume mains power supply.

[0005] However, the EPS emergency power supply is generally activated when the mains power fails. Usually, the power supply is in a floating charge state to maintain a full charge state. However, when the battery is not used for a long time, it is prone to aging, or it is necessary to artificially interrupt the input of the AC mains power every certain period to discharge the battery in the EPS power supply once, and then recharge it with the mains power again. This method not only consumes manpower but also simply activates the battery and cannot evaluate the health status of the battery. Summary of the Invention

[0006] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that it is difficult for the prior art to effectively evaluate the health status of the EPS emergency power supply, which is likely to pose a great hidden danger to the normal emergency use of the EPS emergency power supply.

[0007] To solve the above problems, the present invention provides a prefabricated intelligent fire protection micro-station battery health monitoring system, which includes an intelligent fire protection micro-station, an intelligent power transformation micro-station, and an intelligent management micro-station. The intelligent fire protection micro-station is connected to a water tank and is used to transport the water source in the water tank to the tunnel fire protection pipeline when a fire occurs. The intelligent power transformation micro-station introduces power from the power supply network and distributes the electric energy to each branch circuit switch. The intelligent management micro-station is used to monitor and display the working status of the electrical equipment in the intelligent power transformation micro-station. The intelligent power transformation micro-station includes a high-voltage power distribution module, a power transformation module, a low-voltage power distribution module, and an EPS emergency power supply. The high-voltage power distribution module is connected to the power supply network; The EPS emergency power supply includes a battery pack, and the battery pack includes a plurality of battery monomers; The intelligent power transformation micro-station further includes a power health monitoring module. The power health monitoring module 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 a plurality of battery monomers. The score calculation unit is used to calculate the percentage of the battery monomers with abnormal charge and discharge in the battery pack. The health assessment unit evaluates and warns the health status of the battery pack according to the percentage of the battery monomers with abnormal charge and discharge in the battery pack, the load condition, and the battery temperature condition.

[0008] A prefabricated intelligent fire protection micro-station battery health monitoring method uses a prefabricated intelligent fire protection micro-station management system, which includes the following steps: S0. A corresponding standard range and safety range are set in advance for the discharge voltage, discharge current, charging voltage, and charging current of the battery pack, and the safety range is greater than the standard range; S1. Discharge: At every predetermined time interval, 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 the abnormal battery cell A. According to the percentage of the abnormal battery cell A in the battery pack, the following preliminary evaluations are carried out: S1-1: When the percentage of the abnormal battery cell 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 temperature of the load environment. After adjusting until the load environment monitoring data is normal, if the percentage of the abnormal battery cell A still exceeds M%, no operation is performed. When the percentage of the abnormal battery cell A is lower than N%, it is determined that the abnormal battery discharge is caused by normal load fluctuations, and no battery warning is issued; S1-2: When the percentage of the abnormal battery cell A is lower than N%, where 0 < N < M < 100, it is determined that the health state of the battery pack is normal; S1-3: When the percentage of the abnormal battery cell A is between N% and M%, no evaluation is performed for the time being; S2: Charging: After discharging for a predetermined time, switch back to the mains power supply. The mains power supplies the load, and at the same time, the mains charges the battery pack. Monitor the charging voltage and current data of the battery cells. When 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 the abnormal battery cell B. Similarly, calculate the percentage of the abnormal battery cell B in the battery pack; S2-1: For the situation in step S1-1: When the percentage of the abnormal battery cell B is lower than N%, it is determined that the abnormal battery discharge is caused by a load failure, the health state of the battery pack is normal, and a load warning is issued; When the percentage of the abnormal battery cell B exceeds M%, collect the battery temperature data at this time. When it is within the normal range, it is determined that the charge and discharge of the battery pack are abnormal, and a medium-level battery health warning is issued; On the contrary, when the battery temperature data exceeds the normal range, first cool down the battery pack. After the battery temperature data cools down to the normal range, continue to monitor the charging status of the battery cells. When the percentage of the abnormal battery cell B is lower than N%, it is determined that the battery is abnormally heated, and a battery heating warning is issued. When the percentage of the abnormal battery cell B still exceeds M%, a severe battery health warning is issued, and the battery temperature data is monitored in real time. When it is in an abnormal rising state, a danger warning is issued, and the battery charging process is turned off; 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 health status of the battery pack is judged to be normal. When it exceeds N%, a mild battery health warning is issued.

[0009] 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 connecting pipes, one end of the connecting pipe close to the box body is fixedly connected to a hose, one 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.

[0010] As another improved supplement of 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, a main monitoring box is provided with multiple circular holes, the multiple battery cells are respectively inserted into the multiple circular holes, and the two are tightly fitted, the inner wall of the main monitoring box is fixedly connected with multiple heat-conducting tubes, the multiple heat-conducting tubes correspond to the multiple circular holes one by one, and the inner diameter of the heat-conducting tubes is the same as the inner diameter of the circular holes, and the heat-conducting liquid is filled between the heat-conducting tubes and the inner wall of the main monitoring box.

[0011] As another improved supplement of the present application, a pair of threaded holes communicating with the interior of the main monitoring box are provided at the lower end thereof, and a pair of hoses are threadedly connected to the pair of threaded holes respectively.

[0012] As another improved supplement of the present application, the upper end of the box body is connected with a box cover via a fastener.

[0013] 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.

[0014] As another improvement supplement of 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.

[0015] As a further 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 expandable and cold-contractable material.

[0016] As a supplement to another improvement of the present application, magnetic coatings are applied to the lower end surface of the annular plate and the upper end surface of the main monitoring box.

[0017] In summary, the present application uses intelligent management micro-stations, intelligent power transformation micro-stations, and intelligent fire protection micro-stations to replace traditional building-style substations, cancels the building facilities of tunnel substations, adopts the design concept of prefabricated buildings, and constructs a tunnel intelligent management micro-station integrating functions such as monitoring, management, and emergency in the form of prefabricated cabins. It has the advantages of saving construction costs, shortening the construction period, reducing operating costs, and reducing construction difficulties. Moreover, for the EPS emergency power supply of the intelligent power transformation micro-station, the charging and discharging process is carried out regularly, and the charging and discharging voltages and currents of battery monomers are monitored. According to the percentage of abnormal charging and discharging battery monomers in the battery pack, the load conditions of the powered load, and the battery temperature conditions, the health status of the battery pack is evaluated and warned, the performance health status of the EPS emergency power supply is detected in time, and the potential safety hazards in the use of the EPS emergency power supply are effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a distribution schematic diagram of the first implementation mode of the present application; Figure 2 It is an internal structure schematic diagram of the intelligent management micro-station of the first implementation mode of the present application; Figure 3 It is an internal structure schematic diagram of the intelligent fire protection micro-station of the first implementation mode of the present application; Figure 4 It is a partial system block diagram of the first implementation mode of the present application; Figure 5 It is a three-dimensional view of the battery pack of the second and third implementation modes of the present application Figure 1 ; Figure 6 It is a three-dimensional view of the battery pack of the second and third implementation modes of the present application Figure 2 ; Figure 7 It is a three-dimensional view of the battery pack before installation of the second and third implementation modes of the present application; Figure 8 It is a front structure schematic diagram of the main monitoring box of the second and third implementation modes of the present application; Figure 9 It is a front structure schematic diagram of the main monitoring box during installation of the second and third implementation modes of the present application Figure 1 ; Figure 10 It is a front structure schematic diagram of the main monitoring box during installation of the second and third implementation modes of the present application Figure 2 ; Figure 11 It is a front structure schematic diagram of the secondary monitoring box of the second and third implementation modes of the present application; Figure 12 Front structural schematic diagram of the auxiliary monitoring box in the second and third embodiments of the present application during installation; Figure 13 Front structural schematic diagram of the main monitoring box and the auxiliary monitoring box in the second and third embodiments of the present application after installation; Figure 14 Top surface structural schematic diagram of the main monitoring box in the second and third embodiments of the present application Figure 1 ; Figure 15 Top surface structural schematic diagram of the main monitoring box in the second and third embodiments of the present application Figure 2 ; Figure 16 Front structural schematic diagram of the main monitoring box and the auxiliary monitoring box in the second and third embodiments of the present application during use; Figure 17 Three-dimensional view of the battery pack in the second and third embodiments of the present application Figure 3 .

[0019] In the figure: 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 conduction cylinder, 601 - expansion body, 7 - diaphragm, 8 - hose, 9 - connecting pipe, 10 - pipeline. Specific embodiments

[0020] The following describes the three embodiments of the present application in detail with reference to the accompanying drawings.

[0021] The first embodiment: The present invention provides a prefabricated intelligent fire - fighting micro - station battery health monitoring system. Please refer to Figure 1 , which includes an intelligent fire - fighting micro - station, an intelligent power - transformation micro - station, and an intelligent management micro - station. The intelligent fire - fighting micro - station is connected to a water tank. As Figure 3 shown, the intelligent fire - fighting micro - station mainly consists of a container body, a fire - fighting water supply pump group, an intelligent control cabinet, an air conditioner, lighting, etc., and is used to transport the water source in the water tank to the tunnel fire - fighting pipeline in case of a fire; the intelligent power - transformation micro - station introduces power from the power supply network and distributes the electric energy to each branch circuit switch; as Figure 2 shown, the intelligent management micro - station is internally provided with a server, a computer terminal with a visual interface, etc., and is used to monitor and display the working status of the electrical equipment in the intelligent power - transformation micro - station.

[0022] 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 a 10KV power supply 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 to primary load power supply equipment such as accident lighting and fire-fighting facilities in an emergency state.

[0023] The EPS emergency power supply includes a battery pack, which includes a plurality of battery cells; See also Figure 4 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 according to the percentage of battery cells with abnormal charging and discharging in the battery pack, the load condition and the battery temperature condition.

[0024] A method for monitoring the battery health of a pre-installed intelligent fire-fighting micro-station is managed by a pre-installed intelligent fire-fighting micro-station management system, comprising the following steps: S0, presetting 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; 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 technicians in this field according to the battery model, parameters, usage requirements, etc. S1. Discharge: At every predetermined time interval (for example, every 24 hours), the output switching device switches the mains power supply state to the EPS emergency power supply state to supply power to the load, and monitors the discharge voltage and current data of each battery cell in the battery pack at the same time. When any one of the discharge voltage or discharge current deviates from the corresponding standard range but is within the corresponding safety range, it is recorded as an abnormal battery cell A. According to the percentage of abnormal battery cells A in the battery pack, the following preliminary evaluation is performed: S1-1. When the percentage of the abnormal battery cell A exceeds M%, first collect the load environment monitoring data. The basis for this operation is that when the percentage of the abnormal battery cell A exceeds M%, it indicates that there are a relatively large number of battery cells with abnormal discharge. In actual situations, the probability that most battery cells fail simultaneously is relatively low. At this time, it is possible that the abnormal discharge is caused by load fluctuations (such as changes in load power). Therefore, first conduct the following preliminary evaluation based on the load environment monitoring data; When the data is normal, no operation is performed. When the data is abnormal, adjust the temperature of the load environment. After adjusting until the load environment monitoring data is normal, if the percentage of the abnormal battery cell A still exceeds M%, no operation is performed. When the percentage of the abnormal battery cell A is lower than N%, it is determined that the abnormal battery discharge is caused by normal load fluctuations (here, normal load fluctuations refer to the load being temporarily affected by environmental factors during its operation), and no battery warning is issued; Supplementary note: The load is the electrical equipment. In the environmental area where the electrical equipment is located, a temperature sensor and a circulating refrigeration device are set. The temperature sensor monitors the environmental temperature where the electrical equipment is located, so that the load environment monitoring data can be obtained. The circulating refrigeration device (such as an air conditioner) can adjust the temperature of the load environment when needed; S1-2. When the percentage of the abnormal battery cell A is lower than N%, where 0 < N < M < 100, it is determined that the health status of the battery pack is normal and no warning is required. For example, N is 10 and M is 70; S1-3. When the percentage of the abnormal battery cell A is between N% and M%, no evaluation is performed for the time being; S2. Charging: After the discharge preset time (such as 10 minutes), switch back to the mains power again. The mains power supplies the load, and at the same time, the mains power charges the battery pack. Monitor the charging voltage and current data of the battery cells. When any one of the charging voltage or charging current deviates from the corresponding standard range but is within the corresponding safety range, it is recorded as the abnormal battery cell B. Similarly, calculate the percentage of the abnormal battery cell B in the battery pack; S2-1. For the situation in step S1-1: When the percentage of the abnormal battery cell B is lower than N%, it indicates that the battery charging is normal. Then it is determined that the abnormal battery discharge is caused by a load failure, the health status of the battery pack is normal, and a load warning is issued; When the percentage of the abnormal battery cell B exceeds M%, collect the battery temperature data at this time. When it is within the normal range, it is determined that there are abnormal charge and discharge conditions in the battery pack. Combining the discharge situation in step S1-1, when the battery cells exceeding M% have both abnormal discharge and abnormal charging, it indicates that the battery cells exceeding M% have a performance decline. To ensure the normal use of the battery pack in the later stage, a medium battery health warning is issued; Conversely, when the battery temperature data exceeds the normal range, first cool down the battery pack. After the battery temperature data drops to the normal range, continue to monitor the charging status of the individual battery cells. When the percentage of abnormal battery cell B is lower than N%, it is determined that the battery has abnormal heating, and a battery heating warning is issued. When the percentage of abnormal battery cell B still exceeds M%, a severe battery health warning is issued, and the battery temperature data is monitored in real time. When it is in an abnormal rising state, a danger warning is issued, and the battery charging process is shut down; Supplementary description: In this embodiment, a temperature sensor can be used to monitor the temperature status of the battery pack, and an air-cooled heat dissipation structure is set up to realize the cooling process of the battery pack in step S2-1; S2-2. For the situation in step S1-3: When the abnormal battery cell A is also recorded as the abnormal battery cell B, it is recorded as a key battery cell. When the percentage of the key battery cell in the battery pack is lower than N%, it is determined that the health status of the battery pack is normal. When it exceeds N%, a mild battery health warning is issued.

[0025] In the above prefabricated intelligent fire micro-station management method, the following steps are further included: Step S3, during the battery charging and discharging process, when it is monitored that the charging voltage, current or discharging voltage, current of the individual battery cell deviates from the corresponding safety range, it indicates that the individual 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.

[0026] Supplementary description: 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. Since in actual situations, there are more or less some differences among the multiple individual battery cells in the battery pack, and it is normal for the performance of the battery to decline compared to its initial state after being used for a period of time. In this application, being lower than N% indicates that only a very small number of individual battery cells have a performance decline, and the entire battery pack can still work normally, so there is no need for a warning for the time being.

[0027] The second embodiment: In this embodiment, the following specific settings are made for the monitoring method of the temperature status of the battery pack, and the rest of the content is the same as that of the first embodiment: Please refer to Figure 5 and Figure 6 , the battery pack includes a box body 1 and a battery pack 3 installed inside the box body 1. A main monitoring box 5 is sleeved outside the battery pack 3. During use, the inside of the main monitoring box 5 is filled with a heat-conducting liquid (as shown in combination with Figure 13 ), and a temperature sensor (not shown in the figure) immersed in the heat-conducting liquid is fixedly connected to the inner wall of the main monitoring box 5. Please refer to Figure 9, both sides of the box body 1 are fixedly connected with a pipe 9, one 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.

[0028] 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, so that the plurality of battery cells 31 can be electrically connected through conductive connecting strips. This is an existing battery pack installation technology. 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 plurality of circular holes 501, and the two are closely 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 sleeved on the outside of the battery cell 31, and then the mounting plate 32 is installed at both ends of the battery cell 31. The multiple battery cells 31 respectively penetrate the multiple circular holes 501, and 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 liquid to heat it up. The temperature of the heat-conducting liquid is monitored by the temperature sensor, and the temperature condition of the battery pack 3 is indirectly obtained.

[0029] 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 coordination of the main monitoring box 5, the heat transfer tube 6, the heat transfer liquid and other structures to enable the temperature of each battery cell 31 to be transferred 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.

[0030] And, combined with Figure 13As shown, one end of the connecting pipe 9 far from the box body 1 is fixedly connected to one port of a water pump through a pipe 10, and the other port of the water pump is connected to a water tank. After the heat-conducting liquid (i.e., water) is injected, the connecting pipe 9 is connected to the water pump. When needed (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 pumps out the water in the main monitoring box 5 and transports it to the water tank, thus realizing the replacement of the water in the main monitoring box 5 and using the water in the water tank to cool the battery pack 3 (Supplementary note: Compared with the main monitoring box 5, the water tank has a large volume and a large amount of water. Therefore, discharging and filling water in the same water tank is not likely to cause obvious changes in the water temperature in the water tank, and effective cooling of the battery pack 3 can be achieved).

[0031] A pair of threaded holes 503 communicating with the inside thereof are opened at the lower end of the main monitoring box 5, and a pair of flexible hoses 8 are respectively threadedly connected to the pair of threaded holes 503. The upper end of the box body 1 is connected with a box cover 2 through fasteners.

[0032] The 3rd implementation method: Based on the 2nd implementation method, the following content is added: Please refer to Figure 6 and Figure 7 , the battery pack further includes a secondary monitoring box 4 located above the main monitoring box 5. The secondary monitoring box 4 includes an annular plate 41 sleeved outside the battery cell 31. Combining Figure 11 shown, an annular cavity 4101 is opened inside the annular plate 41. An elastic membrane 42 and a pressure sensor 44 are fixedly connected to the inner wall of the annular cavity 4101, and the pressure sensor 44 is located below the elastic membrane 42. An annular piston 43 is slidably connected inside the annular cavity 4101, and the annular piston 43 is located below the pressure sensor 44. A pair of square holes 4102 communicating with the annular cavity 4101 are opened at the lower end of the annular plate 41. A pair of rectangular holes 502 corresponding to the positions of the square holes 4102 are opened at the upper end of the main monitoring box 5. A diaphragm 7 is provided at the orifice of the rectangular hole 502. 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. Magnetic coatings are applied to the lower end surface of the annular plate 41 and the upper end surface of the main monitoring box 5. Combining Figure 12 shown, during installation, the secondary monitoring box 4 is placed on the upper end of the main monitoring box 5, and the two are closely attached through the magnetic coatings. At this time, the square holes 4102 and the rectangular holes 502 are connected. And because the annular piston 43 is annular and the square holes 4102 are strip-shaped, the annular piston 43 is not likely to fall out of the annular cavity 4101.

[0033] Please refer to Figure 14 , an expansion body 601 is fixedly connected to the outer surface of the heat-conducting cylinder 6. The expansion body 601 is made of a material with thermal expansion and contraction properties, such as thermally expandable rubber.

[0034] In the second embodiment, the cooperation of structures such as the main monitoring box 5, the heat conduction cylinder 6, and the heat conduction liquid is used to obtain the battery heating condition, which improves the accuracy of battery temperature monitoring to a certain extent. However, due to the limited fluidity of the heat conduction liquid, there are still certain errors in the monitoring data of the temperature sensor. Therefore, in this embodiment, the setting of the expansion body 601, the secondary monitoring box 4, and the diaphragm 7 further improves the accuracy of battery temperature monitoring: As Figure 15 shown, when some of the battery cells 31 generate heat severely, the battery cells 31 transfer the heat to the heat conduction cylinder 6 in a contact transfer manner, and the heat conduction cylinder 6 transfers the heat to the expansion body 601 and the surrounding heat conduction liquid. The expansion body 601 undergoes thermal expansion, its volume increases, occupying the internal space of the main monitoring box 5, and then causing the heat conduction liquid to squeeze the diaphragm 7, as Figure 16 shown, the heat conduction liquid pushes the diaphragm 7 to pass through the rectangular hole 502 and the square hole 4102 into the annular cavity 4101. At this time, the air pressure in the lower region of the annular piston 43 increases, causing the annular piston 43 to move upward, the air pressure between the elastic membrane 42 and the annular piston 43 increases, and the elastic membrane 42 expands. The air pressure data monitored by the air pressure sensor 44 increases. Therefore, the heating condition of the battery cells 31 is indirectly reflected by the change in the data of the air pressure sensor 44. 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 secondary monitoring box 4 and its related structures. Therefore, those skilled in the art can selectively implement it according to monitoring needs.

[0035] The upper end of the annular plate 41 is provided with air holes 4103 communicating with the annular cavity 4101. When the elastic membrane 42 deforms, the air holes 4103 facilitate the gas flow between the inside of the annular cavity 4101 and the inside of the box body 1, keeping the air pressure stable in the upper region of the elastic membrane 42. The outer end of the box body 1 is fixedly connected with an exhaust pipe with an elastic one-way valve, and the exhaust pipe is communicated with 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 the pressure relief inside the box body 1.

[0036] Combined with the current actual needs, the above-described embodiments adopted in the present application do not limit the protection scope thereto. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of the present application still fall within the protection scope of the present invention.

Claims

1. A prefabricated intelligent fire protection micro-station battery health monitoring system, comprising an intelligent fire protection micro-station, an intelligent power transformation micro-station, and an intelligent management micro-station. The intelligent fire protection micro-station is connected to a water tank and is used to convey the water source in the water tank to the tunnel fire protection pipeline in case of a fire. The intelligent power transformation micro-station introduces power from the power supply network and distributes the electric energy to each branch circuit switch. The intelligent management micro-station is used to monitor and display the working state of the electrical equipment in the intelligent power transformation micro-station. The intelligent power transformation micro-station includes a high-voltage power distribution module, a power transformation module, a low-voltage power distribution module, and an EPS emergency power supply. The high-voltage power distribution module is connected to the power supply network, and it is characterized in that: The EPS emergency power supply includes a battery pack, and the battery pack includes a plurality of battery cells; the intelligent power transformation micro-station further includes a power supply health monitoring module, and the power supply health monitoring module 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 a plurality of battery cells. The score calculation unit is used to calculate the percentage of the 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 according to the percentage of the battery cells with abnormal charging and discharging in the battery pack, the load condition and the battery temperature condition.

2. A prefabricated intelligent fire micro-station battery health monitoring method, which uses the prefabricated intelligent fire micro-station battery health monitoring system as described in claim 1, and is characterized in that: It includes the following steps: S0. Preset a corresponding standard range and a safety range for the discharge voltage, discharge current, charging voltage and charging current of the battery pack, and the safety range is greater than the standard range; S1. Discharging: At every predetermined time interval, the output switching device switches the mains power supply state to the EPS emergency power supply to supply power to the load. At the same time, it monitors the discharge voltage and current data of each battery cell in the battery pack. When any one of the discharge voltage or discharge current deviates from the corresponding standard range but is within the corresponding safety range, it is recorded as an abnormal battery cell A. According to the percentage of the abnormal battery cell A in the battery pack, the following preliminary evaluations are carried out: S1-1. When the percentage of the abnormal battery cell 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 temperature of the load environment. After adjusting to the normal load environment monitoring data, if the percentage of the abnormal battery cell A still exceeds M%, no operation is performed. When the percentage of the abnormal battery cell A is lower than N%, it is determined that the abnormal battery discharge is caused by normal load fluctuations, and no battery warning is issued; S1-2. When the percentage of the abnormal battery cell A is lower than N%, where 0 < N < M < 100, it is determined that the health status of the battery pack is normal; S1-3. When the percentage of the abnormal battery cell A is between N% - M%, no evaluation is performed temporarily; S2. Charging: After discharging for a predetermined time, switch back to the mains power supply. The mains power supply supplies power to the load and charges the battery pack at the same time. Monitor the charging voltage and current data of the battery cells. When any one of the charging voltage or charging current deviates from the corresponding standard range but is within the corresponding safety range, it is recorded as an abnormal battery cell B. Similarly, calculate the percentage of the abnormal battery cell B in the battery pack; S2-1. For the situation in step S1-1: When the percentage of the abnormal battery cell B is lower than N%, it is determined that the abnormal battery discharge is caused by a load failure, the health status of the battery pack is normal, and a load warning is issued; When the percentage of the abnormal battery cell B exceeds M%, at this time, collect the battery temperature data. When it is within the normal range, it is determined that the battery pack has abnormal charging and discharging, and a medium-level battery health warning is issued; Conversely, when the battery temperature data exceeds the normal range, first cool down the battery pack. After the battery temperature data drops to the normal range, continue to monitor the charging status of the battery cells. When the percentage of abnormal battery cell B is lower than N%, it is determined that there is an abnormal battery heat generation, and a battery heat generation warning is issued. When the percentage of abnormal battery cell B still exceeds M%, a severe battery health warning is issued, and the battery temperature data is monitored in real time. When it is in an abnormal 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 the abnormal battery cell A is also recorded as the abnormal battery cell B, it is recorded as a key battery cell. When the percentage of the key battery cells in the battery pack is lower than N%, it is determined that the health status of the battery pack is normal. When it exceeds N%, a mild battery health warning is issued.

3. The prefabricated intelligent fire micro-station battery health monitoring system according to claim 1, wherein: The battery pack includes a box body (1) and a battery group (3) installed inside the box body (1). The outer end of the battery group (3) is sleeved with a main monitoring box (5). The inside of the main monitoring box (5) is filled with a heat-conducting liquid. The inner wall of the main monitoring box (5) is fixedly connected with a temperature sensor immersed in the heat-conducting liquid. Both sides of the box body (1) are fixedly connected with connecting pipes (9). One end of the connecting pipe (9) close to the box body (1) is fixedly communicated with a flexible pipe (8). The end of the flexible pipe (8) far from the connecting pipe (9) is threadedly connected to the lower end of the main monitoring box (5). The end of the connecting pipe (9) far from the box body (1) is fixedly communicated with one port of a water pump through a pipe (10). The other port of the water pump is communicated with a water tank.

4. The prefabricated intelligent fire micro-station battery health monitoring system according to claim 3, characterized in that: The battery group (3) includes a plurality of battery cores (31) and a plurality of mounting plates (32) sleeved on the upper and lower ends of the battery cores (31). A plurality of round holes (501) are formed in the main monitoring box (5). The plurality of battery cores (31) are respectively inserted into the plurality of round holes (501), and the two are in close contact. The inner wall of the main monitoring box (5) is fixedly connected with a plurality of heat-conducting cylinders (6). The plurality of heat-conducting cylinders (6) correspond to the plurality of round holes (501) one by one, and the inner diameter of the heat-conducting cylinder (6) is the same as the inner diameter of the round hole (501). The heat-conducting liquid is filled between the heat-conducting cylinder (6) and the inner wall of the main monitoring box (5).

5. The prefabricated intelligent fire micro-station battery health monitoring system according to claim 3, characterized in that: A pair of threaded holes (503) communicating with the inside are formed in the lower end of the main monitoring box (5). The flexible pipe (8) is threadedly connected to the threaded holes (503).

6. The prefabricated intelligent fire micro-station battery health monitoring system according to claim 3, wherein: The upper end of the box body (1) is connected with a box cover (2) through a fastener.

7. The prefabricated intelligent fire protection micro-station battery health monitoring system according to claim 3, characterized in that: The battery pack further includes a secondary monitoring box (4) located above the main monitoring box (5). The secondary monitoring box (4) includes an annular plate (41) sleeved outside the battery core (31). An annular cavity (4101) is formed inside the annular plate (41). The inner wall of the annular cavity (4101) is fixedly connected with an elastic membrane (42) and a pressure sensor (44), and the pressure sensor (44) is located below the elastic membrane (42). An annular piston (43) is slidably connected inside the annular cavity (4101), and the annular piston (43) is located below the pressure sensor (44).

8. The prefabricated intelligent fire micro-station battery health monitoring system according to claim 7, characterized in that: A pair of square holes (4102) communicating with the annular cavity (4101) are formed at the lower end of the annular plate (41). 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 orifice of the rectangular hole (502), and the edge end of the diaphragm (7) is fixedly connected to the inner wall of the main monitoring box (5).

9. The prefabricated intelligent fire micro-station battery health monitoring system according to claim 4, characterized in that: An expansion body (601) is fixedly connected to the outer surface of the heat conduction cylinder (6), and the expansion body (601) is made of a material with thermal expansion and contraction properties.

10. The prefabricated intelligent fire micro-station battery health monitoring system according to claim 7, characterized in that: Magnetic coatings are provided on both the lower end face of the annular plate (41) and the upper end face of the main monitoring box (5).

Images