Energy storage unit for power-off slow descending device of elevator

Abstract

The invention relates to an energy storage unit for an elevator power-off slow descending device, which is applied to the field of electric energy storage, and effectively ensures that an energy storage module is in a good working state by performing a power-off rehearsal process in an idle period of an elevator, simulating a mains supply power-off condition and testing an emergency response effect of the energy storage module. The problem of performance reduction or failure caused by long-term non-use is reduced, meanwhile, the failure fault of the energy storage module can be found in time, the probability of casualties or goods damage caused by failure of the energy storage module in the actual situation is greatly reduced, and by monitoring and analyzing the voltage, the current and the temperature when the energy storage module is charged, the energy storage module can be effectively protected. The stability of the energy storage module during charging can be effectively judged, the service life and the health condition of the energy storage module are judged to a certain extent, potential problems of the energy storage module are found in advance, service life early warning is performed on a remote monitoring terminal when the potential problems occur, meanwhile, the interval duration of power-loss rehearsal is shortened, and the power-loss rehearsal efficiency is improved. And the failure condition of the abnormal energy storage module can be conveniently detected in time.

Description

Technical Field

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

[0002] Elevators are indispensable tools in today's buildings. They play a vital role whether carrying goods or people. Generally speaking, the power supply for the normal operation of elevators is generally provided by the mains, but the mains may also be cut off unexpectedly. Once the mains fails, the elevator is at risk of sudden drop during operation, which brings unpredictable safety problems to personnel. Therefore, elevators are generally equipped with energy storage units to provide emergency power for the elevator when the mains fails, ensuring that the elevator can safely and smoothly perform a slow-down operation to ensure the safety of passengers or goods.

[0003] For example, the specification of Chinese patent CN1116727C discloses an emergency power supply device for a power outage of an elevator. A controller is provided inside the elevator car. The emergency power supply device is provided with a storage barrel above a first battery or a second battery. An electric energy liquid with electric energy is installed inside the storage barrel, and a flow valve is provided at the bottom of the storage barrel to control the flow path of the electric energy liquid, so that the electric energy liquid can enter the first or second battery under the control of the flow valve and supply power to the elevator when the power is out. The present invention is an emergency power supply device for an elevator that uses a battery to automatically replenish and charge the elevator to start the elevator. It can function in an emergency and makes the operation simpler, thereby improving the overall probability of escaping from trouble.

[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 conversion device to the auxiliary battery and the construction elevator operating platform, and the power supply path between the auxiliary battery and the construction elevator operating platform; the power 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, to ensure that the construction elevator operating platform can continue to be used without the need for manual switching by construction personnel, thereby 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 view of the above-mentioned prior art, 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, posing a life-threatening danger to passengers.

[0007] In order to solve the above problems, the present invention provides an energy storage unit for a power-off slow-descent device for an elevator, comprising an energy storage power supply platform, a switching rehearsal platform and a rehearsal time control platform, wherein the energy storage power supply platform comprises a charging module, an energy storage module, an inverter module and a circuit conversion module, wherein the charging module is used to charge the energy storage module when it is detected that the energy storage module is insufficient in 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, and the circuit conversion module is used to control the circuit connection between the inverter module and the mains 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 collects images in the elevator car through a camera. 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 a running 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 a power-off slow-descent device for an elevator, 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 to maintain normal operation. When the mains 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 to operate.

[0013] A2. Regularly switch previews:

[0014] A2-1. At regular intervals, during the set off-peak period of the elevator operation, when it is detected that the elevator has not been running for more than S time, the image information inside the elevator car is collected at this time, and the presence of people and goods in the elevator is determined based on the image;

[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 lifting system controls the elevator to start automatically, so that the elevator runs without load under the power supply of the mains. Then the circuit conversion module disconnects the elevator from the mains, and the energy storage module supplies power to the elevator instead. The emergency response capability of the energy storage power supply platform is judged by observing the operation of the elevator.

[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 a power-off slow-descent device for an elevator, and a method for 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 the 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 the real-time current fluctuation value of the energy storage module are obtained according to 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 changes of the current 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 at this time;

[0025] W6. Issue a life warning to the remote monitoring terminal and shorten the interval of the switching preview 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 on the basis of 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 improvement supplement of the present application, the outer sliding sleeve of the liquid storage bag is provided with a liquid pushing plate, an end of the liquid pushing plate away from the mesh plate is provided with an opening groove, an end of the liquid pushing plate close to the mesh plate is provided with a receiving groove, and the middle part of the liquid pushing plate is provided with an aisle groove connecting the opening groove and the receiving groove. 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 a 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 push plate, and liquid conducting 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 conducting channels, and the end of the liquid storage capsule away from the mesh plate is sleeved on the outer side of the lower opening end of the liquid conducting channel, and the two are connected.

[0034] As another improved supplement of 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, 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 of the present application, a plurality of fans are fixedly connected to the inner wall of the battery box, and the fans are located at 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 performing a power failure rehearsal process 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 discover emergency power supply failures of the energy storage module, greatly reducing the probability of casualties or damage to goods caused by failure of the energy storage module in actual situations, and 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 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 the present application;

[0038] Figure 2 This is a system diagram of the pre-performance timing control platform of 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 the present application Figure 1 ;

[0040] Figure 4 The side structure diagram of the energy storage module in the second embodiment of the present application Figure 1 ;

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

[0042] Figure 6 The side structure diagram of the energy storage module in the second embodiment of the present application Figure 2 ;

[0043] Figure 7 This is an internal stereogram 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 the present 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 modes 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 a power-off slow-descent device for an elevator, see 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 insufficient. 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 direct current output by the energy storage module into the alternating current 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 of the elevator to provide elevator operation stability. 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 mains power to be connected to the elevator, and the elevator is powered by the mains power. When the mains power fails, the elevator is powered by the energy storage module instead. The direct current 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 acquires 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 acquires 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 at night will be greatly reduced. 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 operation status of the elevator car and whether there are objects inside it are judged. If the requirements are met, the elevator power failure rehearsal is performed, which is not easy to affect the use of the elevator, and it is not easy to cause safety problems for people or goods;

[0052] To further improve the safety of power-off rehearsal, during the off-peak period of elevator operation, first collect 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, and a power-off rehearsal can be performed at this time (please refer to steps A2-1 to A2-4 below for specific power-off rehearsal operations).

[0053] An energy storage unit for a power-off slow-descent device for an elevator, 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 to maintain normal operation. When the mains 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 to operate.

[0056] A2. Regularly switch previews:

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

[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 lifting system controls the elevator to start automatically, so that the elevator runs without load under the power supply of the mains. Then the circuit conversion module disconnects the elevator from the mains, and the energy storage module supplies power to the elevator instead. The emergency response capability of the energy storage power supply platform is judged by observing the operation of the elevator.

[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 the failure of the energy storage module in actual situations.

[0063] 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. 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 rehearsal execution module.

[0064] Combination Figure 2 As shown, an energy storage unit for a power-off slow-descent device for an elevator, and a method for using the energy storage unit 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 the 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 the real-time current fluctuation value of the energy storage module are obtained according to 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 changes of the current 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 at this time;

[0070] W6. Provide a life warning to the remote monitoring terminal through the self-damage assessment module, and at the same time transmit a signal to shorten the interval of switching the rehearsal in step A2 to the rehearsal execution module.

[0071] Through the above-mentioned monitoring and analysis process of 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 remaining life and health status of the energy storage module can be judged to a certain extent, and potential problems of the energy storage module can be discovered in advance. When the energy storage module is in an abnormal condition, a life warning is sent to the remote monitoring terminal, so that personnel can promptly perform on-site maintenance or replacement of the abnormal energy storage module, thereby improving the operating safety of the elevator. At the same time, by shortening the interval time of the switching rehearsal in step A2, the emergency response capability of the abnormal energy storage module can be detected in a timely and effective manner, thereby reducing elevator operation accidents caused by failure of the abnormal energy storage module.

[0072] Second implementation method:

[0073] Based on Implementation 1, this implementation adopts the following process to replace step W5:

[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 on the basis of 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 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. 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 connecting the opening groove 501 and the receiving groove 503 is provided in the middle of the liquid pushing plate 5, the vertical 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 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, and 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 conducting channels 101 are opened 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 connected with the corresponding liquid conducting channels 101. One 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 conducting 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 conducting channel 101.

[0081] The inner wall of the battery box 1 is also fixedly connected with a plurality of fans 8, and the fans 8 are located at the lower side of the liquid storage bag 4. The self-damage assessment module is connected with a safety enhancement module for controlling 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 each other, 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 closes the mesh plate 3, and the liquid storage capsule 4 and the liquid pushing plate 5 cooperate with each other to start the closing effect on the upper end opening of the battery box 1, thereby closing 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 undergo a high-temperature reaction, 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 performing step N3, the electric push rod 7 and the fan 8 are started by the safety enhancement module, and the electric push rod 7 drives a pair of liquid push plates 5 to gradually move away, such as Figure 6 and Figure 7 As shown, at this time, the liquid storage capsule 4 moves in the passage groove 502. Due to the size setting of the passage 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 moving, and then disperse it into multiple liquid sub-capsules 6 through the liquid guide channel 101, so that the liquid sub-capsules 6 are filled with liquid 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, 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 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] Furthermore, when the above cooling and heat dissipation measures are adopted, T 充 Gradually cool down to T 环 When the temperature is below 0.040°, 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 easy to affect the temperature of the battery box 1. At the same time, the liquid flame retardant in the liquid distribution capsule 6 will automatically flow back into the liquid storage capsule 4 through the liquid guide channel 101 from high to low, thereby playing a flame retardant role on the battery box 1.

[0085] This embodiment replaces the operation of step W5 in embodiment 1 by setting the above contents, effectively reduces the temperature influence of the ambient temperature on the energy storage module during the charging process, and realizes the temperature regulation effect on the energy storage module with abnormal charging temperature, effectively reduces the occurrence rate of the energy storage module temperature rising to the high temperature value T, and also realizes the fire retardant effect of the energy storage module, further improving the safety of the energy storage module during the charging process, but at the same time, this embodiment also increases the equipment and material costs, therefore, those skilled in the art can selectively set this embodiment according to the actual installation and use environment of the energy storage module.

[0086] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. 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 scope of protection of the present invention.

Claims

1. An energy storage unit for a power-off slow-descent device for an elevator, 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 is detected that the energy storage module 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 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, wherein the rehearsal execution module is connected to the circuit conversion module, the car image acquisition module acquires images in the elevator car through a camera, the image recognition module is used to recognize the acquired images and determine whether there are people and goods in the elevator car, and the car state monitoring module determines whether the elevator car is in operation; The pre-performance 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 pre-performance execution module.

2. The energy storage unit for a power-off slow-descent device for an elevator according to claim 1, characterized in that: The method of use includes the following steps: A1. Operation power supply: During normal use, the elevator is powered by the mains to maintain normal operation. When the mains 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 to operate. A2. Regularly switch previews: A2-1. At regular intervals, during the set off-peak period of the elevator operation, when it is detected that the elevator has not been running for more than S time, the image information inside the elevator car is collected at this time, and the presence of people and goods in the elevator is determined based on the image; 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 lifting system controls the elevator to start automatically, so that the elevator runs without load under the power supply of the mains. Then the circuit conversion module disconnects the elevator from the mains, and the energy storage module supplies power to the elevator instead. The emergency response capability of the energy storage power supply platform is judged by observing the operation of the elevator. 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.

3. The energy storage unit for a power-off slow-descent device for an elevator according to claim 2, characterized in that: The method of using the same 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 the 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 the real-time current fluctuation value of the energy storage module are obtained according to 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 changes of the current 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 at this time; W6. Issue a life warning to the remote monitoring terminal and shorten the interval of the switching preview in step A2.

4. The energy storage unit for a power-off slow-descent device for an elevator according to claim 3, 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 on the basis of 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.

5. The energy storage unit for a power-off slow-descent device for an elevator according to claim 4, characterized in that: The energy storage module comprises a battery pack (2) and a heat insulation cover, wherein the heat insulation cover 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 capsule (4) are fixedly connected to the inner wall of the battery box (1).

6. The energy storage unit for a power-off slow-descent device for an elevator according to claim 5, characterized in that: The outer sliding sleeve of the liquid storage bag (4) is provided with a liquid pushing plate (5), the end of the liquid pushing plate (5) away from the mesh plate (3) is provided with an opening groove (501), the end of the liquid pushing plate (5) close to the mesh plate (3) is provided with a receiving groove (503), and the middle part of the liquid pushing plate (5) is provided with an aisle groove (502) connecting the opening groove (501) and the receiving groove (503), the vertical cross-section of the opening groove (501) is conical, and the opening width thereof gradually decreases in the direction close to the aisle 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).

7. An energy storage unit for a power-off slow-descent device for an elevator according to claim 6, characterized in that: A plurality of liquid distribution capsules (6) are also provided on the upper side of the liquid pushing plate (5), and liquid conducting channels (101) are provided 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 communicated with the corresponding liquid conducting channels (101), and one 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 conducting channel (101), and the two are communicated with each other.

8. The energy storage unit for a power-off slow-descent device for an elevator according to claim 6, 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 bag (4), and the liquid storage bag (4) is slidably connected to the inside 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).

9. The energy storage unit for the power-off slow-descent device of an elevator according to claim 8, 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 at 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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