Energy storage unit for elevator power-off slow-descent device

Abstract

The present invention relates to an energy storage unit for an elevator power-off slow-descent device applied to the field of electric energy storage. By performing a power-off rehearsal process during the idle period of the elevator to simulate a city power outage, the emergency response effect of the energy storage module is tested, thereby effectively ensuring that the energy storage module is in good working condition and reducing performance degradation or failure problems caused by long-term non-use. At the same time, energy storage module failures can also be discovered in a timely manner, greatly reducing the probability of casualties or cargo damage caused by energy storage module failure in actual situations. By monitoring and analyzing the voltage, current and temperature of the energy storage module during charging, the stability of the energy storage module during charging can be effectively judged, and then the life and health status of the energy storage module can be judged to a certain extent, potential problems of the energy storage module can be discovered in advance, and when potential problems occur, a life warning can be sent to a remote monitoring terminal. At the same time, the interval of the power-off rehearsal is shortened, so that abnormal energy storage module failure conditions can be detected in a timely manner.

Description

Technical Field

[0001] The present invention relates to an energy storage unit, and in particular to an energy storage unit for an elevator power-off slow-descent device applied in the field of electric energy storage. Background Art

[0002] Elevators are indispensable tools in today's buildings, playing a vital role in carrying both cargo and people. Generally speaking, the power supply for the normal operation of elevators is generally provided by the mains, but the mains can also be subject to unexpected power outages. Once the mains power fails, there is a risk of the elevator suddenly descending during operation, posing unpredictable safety issues to personnel. Therefore, elevators are generally equipped with energy storage units to provide emergency power to the elevator in the event of a mains power outage, ensuring that the elevator can descend safely and smoothly, protecting the safety of passengers or cargo.

[0003] For example, the specification of Chinese patent CN1116727C discloses an emergency power supply device for an elevator power outage. A controller is installed inside the elevator car. The emergency power supply device is based on a storage tank installed above a first battery or a second battery. An electric energy liquid with electrical energy is installed inside the storage tank. A flow valve is provided at the bottom of the storage tank to control the flow path of the electric energy liquid. The electric energy liquid enters the first or second battery under the control of the flow valve and can then supply power to the elevator in the event of a power outage. The present invention is an emergency power supply device for an elevator that uses batteries to automatically recharge and start the elevator. It can function in an emergency and makes operation easier, thereby increasing the overall probability of escape.

[0004] For example, the specification of Chinese patent CN105515174B discloses a construction elevator operating platform and its power supply device, including: a main switch, a power conversion device, an auxiliary battery and a control system. The main switch is used to connect or disconnect the power supply path from the power conversion device to the auxiliary battery and the construction elevator operating platform, and between the auxiliary battery and the construction elevator operating platform; the power supply end of the power conversion device is connected to the input power supply, for converting the input power supply into direct current of a preset voltage; the first detection end of the control system is connected to the detection end of the power conversion device, for detecting whether the input power is off, and when the input power is off, the auxiliary battery is converted to supply power to the construction elevator operating platform, ensuring that the construction elevator operating platform can continue to be used without the need for manual switching by construction personnel, providing convenience for construction personnel.

[0005] Since the energy storage unit that provides emergency power for the elevator is not used during normal times and only provides emergency power during power outages, if it is not used for a long time, it may experience performance degradation, capacity reduction, component aging, damage and other problems, which will affect its power supply response capability in an emergency. Once its emergency power supply response capability fails, it will put the lives of passengers in danger. Summary of the Invention

[0006] In response to the above-mentioned existing technologies, the technical problem to be solved by the present invention is that the energy storage unit that provides emergency power for the elevator is prone to performance degradation, capacity reduction, component aging, damage and other problems due to long-term non-use, thereby causing the emergency power supply response capability to fail and posing a life-threatening danger to passengers.

[0007] To solve the above problems, the present invention provides an energy storage unit for an elevator power-off slow-descent device, comprising an energy storage power supply platform, a switching rehearsal platform, and a rehearsal time control platform. The energy storage power supply platform comprises a charging module, an energy storage module, an inverter module, and a circuit conversion module. The charging module is used to charge the energy storage module when it detects that the energy storage module is low on power. The inverter module is used to convert the direct current output by the energy storage module into the alternating current required by the elevator. The circuit conversion module is used to control the circuit connection between the inverter module and the mains power and the elevator.

[0008] The switching rehearsal platform includes a car image acquisition module, an image recognition module, a car state monitoring module, a time module and a rehearsal execution module. The rehearsal execution module is connected to the circuit conversion module. The car image acquisition module uses a camera to collect images inside the elevator car. The image recognition module is used to identify the collected images and determine whether there are people and goods in the elevator car. The car state monitoring module determines whether the elevator car is in an operating state.

[0009] The rehearsal timing control platform includes a current monitoring module, a voltage monitoring module, a temperature monitoring module, a power monitoring module and a self-damage assessment module, and the self-damage assessment module is connected to the rehearsal execution module.

[0010] An energy storage unit for an elevator power-off slow-descent device, and a method for using the energy storage unit comprises the following steps:

[0011] A1. Operation power supply:

[0012] During normal use, the elevator is powered by the mains electricity to maintain normal operation. When the mains electricity fails, the elevator is connected to the energy storage module through the circuit conversion module, and the energy storage module provides emergency power for the elevator to enable it to continue operating.

[0013] A2. Regularly switch previews:

[0014] A2-1. At regular intervals, during the set off-peak period of the elevator operation, when the elevator is detected to be non-operating for a period of time exceeding S, image information of the interior of the elevator car is collected at this time, and the presence of people and goods in the elevator is determined based on the image information;

[0015] A2-2. When it is determined that there are no people or goods in the elevator, the rehearsal execution module transmits the rehearsal command to the elevator system and the circuit conversion module that control the operation of the elevator;

[0016] A2-3. The elevator system controls the elevator to automatically start, allowing it to operate without load and powered by the mains. The circuit conversion module then disconnects the elevator from the mains, allowing the energy storage module to supply power to the elevator instead. The elevator's operating status is then observed to determine the emergency response capabilities of the energy storage power supply platform.

[0017] A2-4. When the elevator can operate normally under the emergency power supply of the energy storage power supply platform, it indicates that the reliability and stability of the energy storage power supply platform are in good condition. At this time, the elevator is switched back to the mains power supply and the elevator can be used normally.

[0018] On the contrary, when there is an abnormality in the operation of the elevator, it indicates that there is an emergency power supply abnormality in the energy storage power supply platform. At this time, in order to effectively avoid elevator operation accidents, the circuit conversion module simultaneously cuts off the circuit connection between the mains power and the energy storage module and the elevator, putting it in a power-off and suspended state, and at the same time sends a power supply warning to the remote monitoring terminal.

[0019] An energy storage unit for an elevator power-off slow-descent device, wherein the method of using the energy storage unit further comprises the following steps:

[0020] W1, real-time monitoring of the remaining power of the energy storage module;

[0021] W2. When the remaining power of the energy storage module is lower than a preset value, the charging module is started to charge it. At the same time, the current, voltage and temperature changes of the energy storage module during the charging process are monitored in real time, and the real-time voltage fluctuation value and real-time current fluctuation value of the energy storage module are obtained based on the monitoring data;

[0022] W3. When the voltage fluctuation value exceeds the set voltage fluctuation range, it is recorded as an unstable change. When the number of unstable voltage changes exceeds the safe range, it indicates that the charging stability of the energy storage module is abnormal, and step W6 is performed at this time;

[0023] W4. When the current fluctuation value exceeds the set current fluctuation range, it is also recorded as an unstable change. When the number of unstable current changes exceeds the safe range, it indicates that the charging stability of the energy storage module is abnormal, and step W6 is performed at this time;

[0024] W5. When the temperature of the energy storage module rises to a high temperature value T during charging, it indicates that the charging stability of the energy storage module is abnormal, and step W6 is performed.

[0025] W6. Issue a life warning to the remote monitoring terminal and shorten the interval of the switching rehearsal in step A2.

[0026] As a further supplement to this application, the following process is used instead of step W5:

[0027] N1. When the temperature T of the energy storage module is monitored during charging 充 After rising to the medium temperature value t, the ambient temperature T of the energy storage module is collected in real time 环 and compare it with the real-time energy storage module charging temperature T 充 Make a comparison;

[0028] N2, when T 充 Less than T 环 , and T 充 When it is less than the high temperature value T, where the high temperature value T is greater than the medium temperature value t, no other operation is performed;

[0029] N3, when T 充 Greater than T 环 , and T 充 When the temperature is lower than the high temperature value T, the heat shield on the outside of the energy storage module is opened and cooling measures are initiated to accelerate the heat dissipation of the energy storage module while maintaining flame retardancy.

[0030] N4. Based on step N3, when T 充 When the temperature still gradually rises to the high temperature value T, while performing step W6, the charging of the energy storage module is stopped and the heat insulation cover outside the energy storage module is closed.

[0031] As another improvement of the present application, the energy storage module includes a battery pack and a heat insulation cover, the heat insulation cover includes a battery box arranged on the outside of the battery pack, the bottom end of the battery pack is fixedly connected to the inner bottom surface of the battery box, the upper side of the battery pack is provided with a mesh plate and a pair of liquid storage bags filled with liquid flame retardant, the mesh plate is fixedly connected between the pair of liquid storage bags, and the side ends of the mesh plate and the liquid storage bags are fixedly connected to the inner wall of the battery box.

[0032] As another improved supplement to the present application, the outer sliding sleeve of the liquid storage bag is provided with a liquid pushing plate, an opening groove is provided at the end of the liquid pushing plate away from the mesh plate, a receiving groove is provided at the end of the liquid pushing plate close to the mesh plate, and an aisle groove connecting the opening groove and the receiving groove is provided in the middle of the liquid pushing plate. The vertical cross-section of the opening groove is conical, and the opening width gradually decreases in the direction approaching the aisle groove. When a pair of liquid pushing plates are in contact with each other, the mesh plate is completely located on the inner side of the pair of receiving grooves.

[0033] As another improvement supplement of the present application, a plurality of liquid distribution capsules are provided on the upper side of the liquid pushing plate, and liquid guide channels are opened inside the left and right ends of the battery box. The two ends of the liquid distribution capsules are respectively fixed through the left and right inner walls of the battery box until they are connected with the corresponding liquid guide channels. The end of the liquid storage capsule away from the mesh plate is arranged on the outside of the lower open end of the liquid guide channel, and the two are connected.

[0034] As another improved supplement to the present application, the opening groove, the aisle groove and the receiving groove separate the liquid pushing plate into a pair of completely separated single plates, and the pair of single plates are respectively located on the upper and lower sides of the liquid storage bag, and the liquid storage bag is slidably connected to the inside of the aisle groove, and an electric push rod is fixedly connected between the single plate and the inner wall of the battery box.

[0035] As another improved supplement to the present application, a plurality of fans are fixedly connected to the inner wall of the battery box, and the fans are located on the lower side of the liquid storage bag. The self-damage assessment module is connected to a safety enhancement module that controls the electric push rod and the opening and closing of the fans.

[0036] To summarize, the present application can simulate a city power outage by conducting a power failure rehearsal during the idle period of the elevator, test the power supply capacity and response effect of the energy storage module, effectively ensure that the energy storage unit is in good working condition, and reduce the performance degradation or even failure caused by long-term non-use. At the same time, it can also promptly detect emergency power supply failures of the energy storage module, greatly reducing the probability of casualties or cargo damage caused by energy storage module failure in actual situations. By monitoring and analyzing the voltage, current, and temperature of the energy storage module during charging, it can effectively judge the stability of the energy storage module during charging, and then to a certain extent judge the remaining life and health status of the energy storage module, discover potential problems of the energy storage module in advance, and when potential problems occur, send a life warning to the remote monitoring terminal, and at the same time shorten the interval time of the switching rehearsal, so as to facilitate timely and effective detection of the emergency response capability of the abnormal energy storage module. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a system diagram of the first and second implementation modes of this application;

[0038] Figure 2 This is a system diagram of the pre-performance timing control platform for the first and second implementation modes of this application;

[0039] Figure 3 The overall three-dimensional structure of the energy storage module in the second embodiment of this application Figure 1 ;

[0040] Figure 4 This is a schematic diagram of the side structure of the energy storage module in the second embodiment of this application Figure 1 ;

[0041] Figure 5 This is a three-dimensional diagram of the liquid pusher plate in the second embodiment of the present application;

[0042] Figure 6 This is a schematic diagram of the side structure of the energy storage module in the second embodiment of this application Figure 2 ;

[0043] Figure 7 This is an internal stereoscopic diagram of the energy storage module in the second embodiment of the present application;

[0044] Figure 8 The overall three-dimensional structure of the energy storage module in the second embodiment of this application Figure 2 .

[0045] Description of the numbers in the figure:

[0046] 1 battery box, 101 liquid guide channel, 2 battery pack, 3 mesh plate, 4 liquid storage capsule, 5 liquid push plate, 501 opening slot, 502 aisle slot, 503 receiving slot, 51 single board, 6 liquid distribution capsule, 7 electric push rod, 8 fan. DETAILED DESCRIPTION

[0047] The following describes two implementation methods of the present application in detail with reference to the accompanying drawings.

[0048] The first implementation method:

[0049] The present invention provides an energy storage unit for an elevator power failure slow descent device, please refer to Figure 1 , including an energy storage power supply platform, a switching rehearsal platform and a rehearsal time control platform. The energy storage power supply platform includes a charging module, an energy storage module, an inverter module and a circuit conversion module. The charging module is connected to the energy storage module and is used to charge the energy storage module when it is detected that the energy storage module is low on power. The energy storage module can use a high-performance lithium battery pack with the advantages of high energy density, long life, fast charging and discharging, etc., and can provide reliable power guarantee for the elevator in an emergency. The inverter module is connected to the energy storage module and is used to convert the DC power output by the energy storage module into the AC power required by the elevator. The inverter module can use a high-performance inverter with the advantages of high efficiency, high reliability, low noise, etc., and can automatically adjust the output voltage and frequency according to the load condition of the elevator to provide stability of the elevator operation. The circuit conversion module is connected to the inverter module and the mains power and is used to control the circuit connection between the two and the elevator. Under normal circumstances, the circuit conversion module controls the connection between the mains power and the elevator, and the mains power supplies the elevator. When the mains power fails, the energy storage module supplies power to the elevator instead. The DC power output by the energy storage module is converted by the inverter module and provided to the elevator.

[0050] The switching rehearsal platform includes a car image acquisition module, an image recognition module, a car status monitoring module, a time module and a rehearsal execution module. The rehearsal execution module is connected to the circuit conversion module. The car image acquisition module collects images inside the elevator car through a camera. The image recognition module is connected to the car image acquisition module to identify the images it collects and determine whether there are people and goods in the elevator car.

[0051] The car status monitoring module is used to determine whether the elevator car is in operation. The car status monitoring module is connected to the time module. The time module stores the pre-set low-peak period of elevator operation. Generally speaking, the frequency of elevator use will be greatly reduced at night. Therefore, a reasonable night time period (such as 1:00-4:00) can be set as the low-peak period of elevator operation. Then, during this period, the operating status of the elevator car and whether there are objects inside it are judged. If the requirements are met, a power failure rehearsal of the elevator is performed. This will not only reduce the use of the elevator, but also reduce the safety of people or goods.

[0052] To further improve the safety of power failure rehearsals, during the off-peak period of elevator operation, first capture images and determine whether there are people and goods in the elevator car, and then determine whether the elevator car is in operation. When it is monitored that the elevator car has been running for a period of time, it can be effectively determined that the elevator is in an idle state. At this time, a power failure rehearsal can be performed (for specific power failure rehearsal operations, please refer to steps A2-1 to A2-4 below).

[0053] An energy storage unit for an elevator power-off slow-descent device, and a method for using the energy storage unit comprises the following steps:

[0054] A1. Operation power supply:

[0055] During normal use, the elevator is powered by the mains electricity to maintain normal operation. When the mains electricity fails, the elevator is connected to the energy storage module through the circuit conversion module, and the energy storage module provides emergency power for the elevator to enable it to continue operating.

[0056] A2. Regularly switch previews:

[0057] A2-1. At regular intervals, during the set off-peak period of the elevator operation, if the elevator is not running for more than S time, the car status monitoring module collects image information from the interior of the elevator car at this time and determines whether there are people and goods in the elevator based on the image information;

[0058] A2-2. When it is determined that there are no people or goods in the elevator, the rehearsal execution module transmits the rehearsal command to the elevator system and the circuit conversion module that control the operation of the elevator;

[0059] A2-3. The elevator system controls the elevator to automatically start, allowing it to operate without load and powered by the mains. The circuit conversion module then disconnects the elevator from the mains, allowing the energy storage module to supply power to the elevator instead. The elevator's operating status is then observed to determine the emergency response capabilities of the energy storage power supply platform.

[0060] A2-4. When the elevator can operate normally under the emergency power supply of the energy storage power supply platform, it indicates that the reliability and stability of the energy storage power supply platform are in good condition. At this time, the elevator is switched back to the mains power supply and the elevator can be used normally.

[0061] On the contrary, when there is an abnormality in the operation of the elevator, it indicates that there is an emergency power supply abnormality in the energy storage power supply platform. At this time, in order to effectively avoid elevator operation accidents, the circuit conversion module simultaneously cuts off the circuit connection between the mains power and the energy storage module and the elevator, putting it in a power-off and suspended state, and at the same time sends a power supply warning to the remote monitoring terminal.

[0062] Through the above-mentioned power failure rehearsal process of the elevator during the idle period, the city power outage can be simulated, the power supply capacity and response effect of the energy storage module can be tested, and the energy storage unit can be effectively ensured to be in good working condition, reducing the performance degradation or even failure caused by long-term non-use. At the same time, the emergency power supply failure of the energy storage module can also be discovered in time, greatly reducing the probability of casualties or cargo damage caused by energy storage module failure in actual situations.

[0063] The pre-performance control platform includes a current monitoring module, a voltage monitoring module, a temperature monitoring module, a power monitoring module and a self-damage assessment module. The current monitoring module, the voltage monitoring module and the temperature monitoring module respectively monitor the current, voltage and temperature of the battery module during charging. The power monitoring module monitors the remaining power of the energy storage module. The self-damage assessment module is connected to the pre-performance execution module.

[0064] Combine Figure 2 As shown, an energy storage unit for an elevator power-off slow descent device, and its use method also includes the following steps:

[0065] W1, real-time monitoring of the remaining power of the energy storage module;

[0066] W2. When the remaining power of the energy storage module is lower than a preset value, the charging module is started to charge it. At the same time, the current, voltage and temperature changes of the energy storage module during the charging process are monitored in real time, and the real-time voltage fluctuation value and real-time current fluctuation value of the energy storage module are obtained based on the monitoring data;

[0067] W3. When the voltage fluctuation value exceeds the set voltage fluctuation range, it is recorded as an unstable change. When the number of unstable voltage changes exceeds the safe range, it indicates that the charging stability of the energy storage module is abnormal, and step W6 is performed at this time;

[0068] W4. When the current fluctuation value exceeds the set current fluctuation range, it is also recorded as an unstable change. When the number of unstable current changes exceeds the safe range, it indicates that the charging stability of the energy storage module is abnormal, and step W6 is performed at this time;

[0069] W5. When the temperature of the energy storage module rises to a high temperature value T during charging, it indicates that the charging stability of the energy storage module is abnormal, and step W6 is performed.

[0070] W6. A life warning is issued to the remote monitoring terminal through the self-damage assessment module, and at the same time, a signal for shortening the interval of switching the rehearsal in step A2 is transmitted to the rehearsal execution module.

[0071] By monitoring and analyzing the voltage, current, and temperature of the energy storage module during charging as described above, the stability of the energy storage module during charging can be effectively determined, and further, to a certain extent, the remaining life and health status of the energy storage module can be determined, allowing potential problems with the energy storage module to be discovered in advance. When an energy storage module is in an abnormal condition, a life warning is sent to the remote monitoring terminal, facilitating timely on-site inspection or replacement of the abnormal energy storage module by personnel, thereby improving the operational safety of the elevator. At the same time, by shortening the interval duration of the switching rehearsal in step A2, the emergency response capability of the abnormal energy storage module can be tested in a timely and effective manner, reducing elevator operation accidents caused by failure of abnormal energy storage modules.

[0072] Second implementation method:

[0073] This embodiment adopts the following process instead of step W5 based on embodiment 1:

[0074] N1. When the temperature T of the energy storage module is monitored during charging 充 After rising to the medium temperature value t, the ambient temperature T of the energy storage module is collected in real time 环 and compare it with the real-time energy storage module charging temperature T 充 Make a comparison;

[0075] N2, when T 充 Less than T 环 , and T 充 When it is less than the high temperature value T, where the high temperature value T is greater than the medium temperature value t, no other operation is performed;

[0076] N3, when T 充 Greater than T 环 , and T 充 When the temperature is lower than the high temperature value T, the heat shield on the outside of the energy storage module is opened and cooling measures are initiated to accelerate the heat dissipation of the energy storage module while maintaining flame retardancy.

[0077] N4. Based on step N3, when T 充 When the temperature still gradually rises to the high temperature value T, while performing step W6, the charging of the energy storage module is stopped and the heat insulation cover outside the energy storage module is closed.

[0078] See also Figure 3 and Figure 4The energy storage module includes a battery pack 2 and a heat insulation cover. The heat insulation cover includes a battery box 1 arranged on the outside of the battery pack 2. The bottom end of the battery pack 2 is fixedly connected to the inner bottom surface of the battery box 1. The upper side of the battery pack 2 is provided with a mesh plate 3 and a pair of liquid storage capsules 4 filled with liquid flame retardant. The mesh plate 3 is fixedly connected between the pair of liquid storage capsules 4, and the side ends of the mesh plate 3 and the liquid storage capsules 4 are fixedly connected to the inner wall of the battery box 1. The liquid flame retardant can be a phosphorus-based liquid flame retardant, a nitrogen-based liquid flame retardant or a silicon-based liquid flame retardant.

[0079] See also Figure 4 and Figure 5 The outer sliding sleeve of the liquid storage capsule 4 is provided with a liquid pushing plate 5, an end of the liquid pushing plate 5 away from the mesh plate 3 is provided with an opening groove 501, an end of the liquid pushing plate 5 close to the mesh plate 3 is provided with a receiving groove 503, and a passage groove 502 is provided in the middle of the liquid pushing plate 5 to connect the opening groove 501 and the receiving groove 503. The vertical section of the opening groove 501 is tapered, and its opening width gradually decreases along the direction close to the passage groove 502. The width of the passage groove 502 is equal to the minimum width of the opening groove 501. The opening widths are the same, and the width of the aisle groove 502 is slightly larger than the double-layer thickness of the liquid storage capsule 4, so that the liquid flame retardant in the liquid storage capsule 4 is not easy to pass through it. The opening groove 501, the aisle groove 502 and the receiving groove 503 separate the liquid pushing plate 5 into a pair of completely separated single plates 51, and the pair of single plates 51 are respectively located on the upper and lower sides of the liquid storage capsule 4. The liquid storage capsule 4 is slidably connected to the inside of the aisle groove 502, and an electric push rod 7 is fixedly connected between the single plate 51 and the inner wall of the battery box 1.

[0080] A plurality of liquid distribution capsules 6 are also provided on the upper side of the liquid pushing plate 5. Liquid guide channels 101 are opened inside the left and right ends of the battery box 1. The two ends of the liquid distribution capsule 6 are respectively fixed through the left and right inner walls of the battery box 1 until they are connected with the corresponding liquid guide channels 101. The end of the liquid storage capsule 4 away from the mesh plate 3 is sleeved on the outside of the lower open end of the liquid guide channel 101, and the two are connected. When necessary, the liquid flame retardant in the liquid storage capsule 4 can enter the liquid distribution capsule 6 through the liquid guide channel 101.

[0081] The inner wall of the battery box 1 is also fixedly connected to a plurality of fans 8, which are located on the lower side of the liquid storage capsule 4. The self-damage assessment module is connected to a safety enhancement module that controls the electric push rod 7 and the opening and closing of the fans 8.

[0082] In the initial state, if Figure 3 and Figure 4As shown, a pair of liquid pushing plates 5 fit together, and the mesh plate 3 is completely located on the inner side of a pair of receiving grooves 503. At this time, the liquid pushing plate 5 has a sealing effect on the mesh plate 3, and the liquid storage capsule 4 and the liquid pushing plate 5 cooperate with each other to start the sealing effect on the upper end opening of the battery box 1, and then have a sealing effect on the battery pack 2, effectively reducing the impact of external temperature changes on the battery pack 2. At the same time, since the liquid distribution capsule 6 is on the upper side of the liquid storage capsule 4, the liquid flame retardant will be stably filled in the interior of the liquid storage capsule 4. The liquid flame retardant inside the liquid storage capsule 4 has an effective fire-proof and flame-retardant effect on the battery box 1. When the battery pack 2 inside it accidentally catches fire, the high temperature will melt the liquid storage capsule 4, causing the liquid flame retardant to overflow and a high-temperature reaction to occur, effectively reducing the combustion speed and temperature, and effectively achieving the effect of fire extinguishing and flame retardant, making it difficult for the fire to spread to external objects.

[0083] When step N3 is performed, the electric push rod 7 and the fan 8 are started by the safety enhancement module, and the electric push rod 7 drives the pair of liquid push plates 5 to gradually move away. Figure 6 and Figure 7 As shown, at this time, the liquid storage capsule 4 moves in the aisle groove 502. Due to the size setting of the aisle groove 502, the liquid pusher plate 5 will squeeze the liquid flame retardant in the liquid storage capsule 4 into the liquid guide channel 101 when it moves, and then disperse it into the multiple liquid sub-capsules 6 through the liquid guide channel 101, causing the liquid sub-capsules 6 to be filled and expanded (as shown in FIG. Figure 8 As shown), at the same time, due to the movement of the liquid pushing plate 5, the mesh plate 3 is exposed to the outside world, and the start-up of the fan 8 accelerates the gas flow inside the battery box 1, so that the internal heat of the battery box 1 is quickly dissipated to the outside world through the mesh plate 3, thereby achieving cooling of the battery box 1. In addition, since the liquid flame retardant enters the liquid separation capsule 6, which is also located at the upper end of the battery box 1, when the battery box 1 accidentally catches fire, the high temperature also melts the liquid separation capsule 6, so that the liquid flame retardant can still play an effective role in cooling and flame retardant the battery box 1, that is, achieving the technical effect of accelerating the heat dissipation of the energy storage module on the basis of flame retardancy as recorded in step N3.

[0084] Moreover, through the above cooling and heat dissipation measures, T 充 Gradually cool down to T 环 When the temperature drops below 0.5°C, the fan 8 can be turned off and the electric push rod 7 can be started again to drive the liquid pushing plate 5 back to the initial position and close the mesh plate 3, so that the external temperature is not easily affected by the temperature of the battery box 1. At the same time, the liquid flame retardant in the liquid distribution capsule 6 will automatically flow from high to low through the liquid guide channel 101 back into the liquid storage capsule 4, thereby playing a flame retardant role on the battery box 1.

[0085] This embodiment, through the above-described configuration, replaces the operation of step W5 in embodiment 1, effectively reducing the impact of ambient temperature on the temperature of the energy storage module during charging, and achieving temperature regulation for energy storage modules with abnormal charging temperatures, effectively reducing the incidence of the energy storage module temperature rising to a high temperature value T. It also achieves a fire-retardant effect on the energy storage module, further improving the safety of the energy storage module during the charging process. However, this embodiment also increases equipment and material costs. Therefore, those skilled in the art may selectively configure this embodiment based on the actual installation and use environment of the energy storage module.

[0086] 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. An energy storage unit for an elevator power-off slow-descent device, characterized in that: It includes an energy storage power supply platform, a switching rehearsal platform and a rehearsal time control platform. The energy storage power supply platform includes a charging module, an energy storage module, an inverter module and a circuit conversion module. The charging module is used to charge the energy storage module when it detects that the power is insufficient. The inverter module is used to convert the direct current output by the energy storage module into the alternating current required by the elevator. The circuit conversion module is used to control the circuit connection between the inverter module and the mains power and the elevator. The switching rehearsal platform includes a car image acquisition module, an image recognition module, a car state monitoring module, a time module and a rehearsal execution module. The rehearsal execution module is connected to the circuit conversion module. The car image acquisition module uses a camera to collect images inside the elevator car. The image recognition module is used to identify the collected images and determine whether there are people and goods in the elevator car. The car state monitoring module determines whether the elevator car is in an operating state. The pre-performance control platform includes a current monitoring module, a voltage monitoring module, a temperature monitoring module, a power monitoring module and a self-damage assessment module, and the self-damage assessment module is connected to the pre-performance execution module; The method for using the energy storage unit for the elevator power-off slow descent device comprises the following steps: A1. Operation power supply: During normal use, the elevator is powered by the mains electricity to maintain normal operation. When the mains electricity fails, the elevator is connected to the energy storage module through the circuit conversion module, and the energy storage module provides emergency power for the elevator to enable it to continue operating. A2. Regularly switch previews: A2-1. At regular intervals, during the set off-peak period of the elevator operation, when the elevator is detected to be non-operating for a period of time exceeding S, image information of the interior of the elevator car is collected at this time, and the presence of people and goods in the elevator is determined based on the image information; A2-2. When it is determined that there are no people or goods in the elevator, the rehearsal execution module transmits the rehearsal command to the elevator system and the circuit conversion module that control the operation of the elevator; A2-3. The elevator system controls the elevator to automatically start, allowing it to operate without load and powered by the mains. The circuit conversion module then disconnects the elevator from the mains, allowing the energy storage module to supply power to the elevator instead. The elevator's operating status is then observed to determine the emergency response capabilities of the energy storage power supply platform. A2-4. When the elevator can operate normally under the emergency power supply of the energy storage power supply platform, it indicates that the reliability and stability of the energy storage power supply platform are in good condition. At this time, the elevator is switched back to the mains power supply and the elevator can be used normally. On the contrary, when there is an abnormality in the operation of the elevator, it indicates that there is an emergency power supply abnormality in the energy storage power supply platform. At this time, in order to effectively avoid elevator operation accidents, the circuit conversion module simultaneously cuts off the circuit connection between the mains power and the energy storage module and the elevator, putting it in a power-off and suspended state, and at the same time sends a power supply warning to the remote monitoring terminal.

2. The energy storage unit for an elevator power-off slow descent device according to claim 1, characterized in that: The method of use also includes the following steps: W1, real-time monitoring of the remaining power of the energy storage module; W2. When the remaining power of the energy storage module is lower than a preset value, the charging module is started to charge it. At the same time, the current, voltage and temperature changes of the energy storage module during the charging process are monitored in real time, and the real-time voltage fluctuation value and real-time current fluctuation value of the energy storage module are obtained based on the monitoring data; W3. When the voltage fluctuation value exceeds the set voltage fluctuation range, it is recorded as an unstable change. When the number of unstable voltage changes exceeds the safe range, it indicates that the charging stability of the energy storage module is abnormal, and step W6 is performed at this time; W4. When the current fluctuation value exceeds the set current fluctuation range, it is also recorded as an unstable change. When the number of unstable current changes exceeds the safe range, it indicates that the charging stability of the energy storage module is abnormal, and step W6 is performed at this time; W5. When the temperature of the energy storage module rises to a high temperature value T during charging, it indicates that the charging stability of the energy storage module is abnormal, and step W6 is performed. W6. Issue a life warning to the remote monitoring terminal and shorten the interval of the switching rehearsal in step A2.

3. The energy storage unit for an elevator power-off slow descent device according to claim 2, characterized in that: Use the following procedure instead of step W5: N1. When the temperature T of the energy storage module is monitored during charging 充 After rising to the medium temperature value t, the ambient temperature T of the energy storage module is collected in real time 环 and compare it with the real-time energy storage module charging temperature T 充 Make a comparison; N2, when T 充 Less than T 环 , and T 充 When it is less than the high temperature value T, where the high temperature value T is greater than the medium temperature value t, no other operation is performed; N3, when T 充 Greater than T 环 , and T 充 When the temperature is lower than the high temperature value T, the heat shield on the outside of the energy storage module is opened and cooling measures are initiated to accelerate the heat dissipation of the energy storage module while maintaining flame retardancy. N4. Based on step N3, when T 充 When the temperature still gradually rises to the high temperature value T, while performing step W6, the charging of the energy storage module is stopped and the heat insulation cover outside the energy storage module is closed.

4. The energy storage unit for an elevator power-off slow descent device according to claim 3, characterized in that: The energy storage module comprises a battery pack (2) and a heat shield, wherein the heat shield comprises a battery box (1) arranged outside the battery pack (2), the bottom end of the battery pack (2) is fixedly connected to the inner bottom surface of the battery box (1), and the upper side of the battery pack (2) is provided with a mesh plate (3) and a pair of liquid storage capsules (4) filled with liquid flame retardant, the mesh plate (3) is fixedly connected between the pair of liquid storage capsules (4), and the side ends of the mesh plate (3) and the liquid storage capsules (4) are fixedly connected to the inner wall of the battery box (1).

5. The energy storage unit for an elevator power-off slow descent device according to claim 4, characterized in that: The outer sliding sleeve of the liquid storage bag (4) is provided with a liquid pushing plate (5), an end of the liquid pushing plate (5) away from the mesh plate (3) is provided with an opening groove (501), an end of the liquid pushing plate (5) close to the mesh plate (3) is provided with a receiving groove (503), and a passage groove (502) connecting the opening groove (501) and the receiving groove (503) is provided in the middle of the liquid pushing plate (5), the vertical cross-section of the opening groove (501) is conical, and the opening width thereof gradually decreases in the direction close to the passage groove (502), and when a pair of liquid pushing plates (5) are attached to each other, the mesh plate (3) is completely located on the inner side of the pair of receiving grooves (503).

6. The energy storage unit for an elevator power-off slow descent device according to claim 5, characterized in that: A plurality of liquid distribution capsules (6) are further provided on the upper side of the liquid pushing plate (5). Liquid guide channels (101) are provided inside the left and right ends of the battery box (1). The two ends of the liquid distribution capsules (6) are respectively fixed through the left and right inner walls of the battery box (1) until they are communicated with the corresponding liquid guide channels (101). The end of the liquid storage capsule (4) away from the mesh plate (3) is sleeved on the outer side of the lower open end of the liquid guide channel (101), and the two are communicated.

7. The energy storage unit for an elevator power-off slow descent device according to claim 5, characterized in that: The opening groove (501), the passage groove (502) and the receiving groove (503) separate the liquid pushing plate (5) into a pair of completely separated single plates (51), and the pair of single plates (51) are respectively located on the upper and lower sides of the liquid storage capsule (4). The liquid storage capsule (4) is slidably connected to the interior of the passage groove (502), and an electric push rod (7) is fixedly connected between the single plate (51) and the inner wall of the battery box (1).

8. The energy storage unit for an elevator power-off slow descent device according to claim 7, characterized in that: The inner wall of the battery box (1) is also fixedly connected to a plurality of fans (8), the fans (8) being located on the lower side of the liquid storage capsule (4), and the self-damage assessment module is connected to a safety enhancement module for controlling the opening and closing of the electric push rod (7) and the fans (8).

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