An elevator energy-saving control system and control method

Abstract

This invention discloses an elevator energy-saving control system and method, relating to the field of elevator energy-saving technology. It includes: a battery module for supplying power to an auxiliary power supply module and the elevator; a conversion module for converting mains power to DC power and charging the battery module; an auxiliary power supply module for supplying power to the energy-saving control module and the conversion module and controlling their power input to switch between mains power and the battery module; and an energy-saving control module for acquiring mains power information and battery module power information, and controlling the coordinated operation of the battery module, conversion module, and auxiliary power supply module based on the mains power information and battery module power information to achieve energy-saving power consumption for at least one elevator. The maximum capacity of the battery module is the sum of the power required for all elevators to operate normally during the longest historical power outage in the local area and the power required for all elevators to operate normally during the non-minimum electricity price period of the current day. This invention effectively saves energy and improves both economic efficiency and electrical safety.

Description

Technical Field

[0001] This invention relates to the field of elevator energy-saving technology, and in particular to an elevator energy-saving control system and control method. Background Technology

[0002] Currently, elevators are powered by mains electricity. When the mains power fails, the elevator cannot operate stably for extended periods, disrupting daily work and life. Furthermore, the main circuit of the elevator generates regenerative energy, which is currently consumed by resistors, resulting in significant energy waste.

[0003] For example, Chinese patent application CN115483734A utilizes an elevator energy storage stack to recover regenerative energy for elevator operation. It charges the stack during the lowest electricity price period and discharges it to the elevator during peak hours, thus reducing elevator electricity costs. However, this patent uses a DC-DC converter between the energy storage stack and the elevator, resulting in redundancy, a complex energy control algorithm, and the inability to feed power back to the grid. Furthermore, one energy storage stack corresponds to multiple elevators, but these elevators share the same mains power supply circuit. If one elevator malfunctions, the others cannot receive normal energy storage and power. Additionally, many low-voltage control devices in the elevator energy-saving control system require auxiliary power, resulting in continuous power consumption, and the auxiliary power supply for these electrical devices is not explained. Therefore, the energy-saving solution remains overly complex and redundant, unable to achieve distributed power supply control for multiple elevators, and fails to achieve optimal economic benefits. Summary of the Invention

[0004] To address the technical problems existing in the background art, this invention proposes an elevator energy-saving control system and control method.

[0005] In a first aspect, the present invention proposes an elevator energy-saving control system, comprising: a conversion module, an auxiliary power supply module, an energy-saving control module, a battery module, at least one contactor group for being connected one-to-one with at least one elevator, and a circuit breaker connected between the battery module and the at least one contactor group.

[0006] The auxiliary power supply module is used to power the energy-saving control module and the conversion module, and to control the switching of their power input between mains power and battery module.

[0007] The conversion module is used to charge the battery module using AC power; or, the conversion module is used to charge the battery module using AC power and convert the DC power from the battery module into AC power and supply it to the AC power.

[0008] The energy-saving control module is used to acquire mains power information and battery module power information, and control the coordinated operation of the battery module, converter module, auxiliary power supply module, circuit breaker and at least one contactor group to achieve energy-saving power consumption of at least one elevator based on the mains power information and battery module power information.

[0009] The maximum capacity of the battery module is the sum of the electricity required for all elevators to operate normally during the longest power outage in the local grid's history and the electricity required for all elevators to operate normally during the non-minimum electricity price period of the day.

[0010] Preferably, the energy-saving control module is also used to acquire the elevator's status information; when running, the energy-saving control module controls the circuit breaker and each contactor group to close, acquires the elevator's status information and the battery module's power information, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0011] Preferably, the elevator status information includes the number of elevators N, the rated power and real-time power of each elevator, the number of elevators R generating regenerative power, and the number of elevators S using electricity.

[0012] During the operation, the energy-saving control module calculates the total regenerative energy Q generated by elevator R based on the elevator's status information. R And the total energy consumption Q of elevator S s The rechargeable and dischargeable capacities of the battery module are calculated based on its power information; and the total regenerative energy Q generated by elevator R is calculated accordingly. R The total energy consumption Q of elevator S s The rechargeable capacity Q of the battery module 充max and discharge capacity Q 放max The system controls the coordination between the battery module and each contactor group to enable the battery module to discharge to the elevator, receive regenerative energy generated by the elevator's ascent or descent, or remain neither charged nor discharged; where, if Q R Q s And Q R -Q s Q 充max Then control the battery module to receive power to Q. 充max and receives power from the battery module to Q. 充max The contactor group corresponding to elevator R is disconnected; if Q R Q s And Q s - Q R Q 放max Then control the battery module to discharge to the elevator to Q. 放max The battery module discharges to the elevator to Q.放max The contactor group corresponding to elevator R is disconnected; if Q R = Q s Then, the battery module will not be charged or discharged between itself and the elevator.

[0013] Preferably, when the mains power fails, the auxiliary power supply module switches its power input to the battery module, the energy-saving control module controls the conversion module to not operate and the circuit breaker and contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0014] Preferably, when the mains power is available and the battery module meets the first preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input from the battery module to the mains power, and controls the conversion module to convert the mains power into DC power to charge the battery module; the first preset condition is that the voltage of any single cell in the battery module is less than the low voltage threshold of the single cell, the capacity of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the voltage of the battery module is less than the low voltage threshold of the battery module. SO C < battery module capacity low threshold.

[0015] Preferably, during the process of converting AC power to DC power to charge the battery module, when the battery module meets the second preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module, and controls the conversion module to remain inactive. Simultaneously, the battery module and contactor group work together to ensure the battery module supplies power to the elevator, receives regenerative energy generated by the elevator's ascent or descent, or remains neither charged nor discharged within the elevator shaft. The second preset condition is that the voltage of any single battery cell is greater than the single battery cell's voltage regulation threshold, and the state of charge (SOC) of any single battery cell is greater than the single battery cell's high capacity threshold SOC. th The total voltage of the battery module is greater than the high voltage threshold of the battery module, or the state of charge (SOC) of the battery module is greater than the high capacity threshold SOC of the battery module. Bth高 .

[0016] Preferably, when the mains power is available and the battery module meets the first preset condition, the energy-saving control module also controls the circuit breaker and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0017] Preferably, when the mains power is available and the battery module meets the first preset condition, the energy-saving control module also controls the circuit breaker and each contactor group to disconnect;

[0018] During the process of converting AC power to DC power to charge the battery module, when the battery module meets the third preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module; the energy-saving control module controls the circuit breaker and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator; wherein, the third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the low voltage threshold of the single cell, the capacity of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module, and the battery module's... SO C ≥ Low threshold of battery module capacity.

[0019] Preferably, during the process of converting AC power to DC power to charge the battery module at predetermined intervals, the energy-saving control module also controls the battery module to perform charging balance.

[0020] Preferably, during the process of converting AC power to DC power to charge the battery module at predetermined intervals, when the SOC of the battery module reaches the high threshold SOC of the battery module capacity... Bth高 At that time, the energy-saving control module will control the battery module's... SOC Achieving SOC Bth高 The time is recorded as T 充 ; Calculate the battery module SO C reaches SOC Bth高 The time difference between the time of the lowest electricity price period and the time of the end of the period. T 余 ;in, T 余 = T 低结 - T 充 , T 低结 Indicates the end time of the lowest electricity price period for the day; if T 余 > T 均衡min And SOC Bth高 If the battery level is less than 100%, the energy-saving control module will control the conversion module to continue charging the battery module, and simultaneously control the elevator that generates regenerative power to charge the battery module until the battery module reaches its full capacity. SO C reaches 100% or the battery module meets the second preset condition; wherein, the second preset condition is that the total voltage of the battery module > the high voltage threshold of the battery module, or the voltage V of any single cell in the battery module > the high voltage threshold of the single cell, or the SOC of any single cell in the battery module > the high capacity threshold of the single cell; when the battery module SOWhen C reaches 100% or the battery module meets the second preset condition, the energy-saving control module controls the converter module to stop operating, thereby stopping the use of mains power to charge the battery module, and controls the battery module to activate the cell-wide OCV calibration equalization until... T 余 End; among them, T 均衡min The shortest time required for full-domain OCV calibration and equalization of the battery module cells;

[0021] like T 余 > T 均衡min And SOC Bth高 = 100%, then the energy-saving control module controls the battery module to activate the cell-wide OCV calibration equalization until... T 余 End; if T 余 ≤ T 均衡min Then the energy-saving control module controls the battery module to activate the cell-wide OCV calibration equalization until... T 余 Finish.

[0022] Preferably, when the mains power is available and the battery module meets the third preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module, controls the circuit breaker and each contactor group to close, and controls the conversion module to not operate. The battery module and contactor groups are coordinated to allow the battery module to supply power to the elevator or receive regenerative energy generated by the elevator's ascent or descent, or to operate without charging or discharging with the elevator. Alternatively, the conversion module can be controlled to invert the DC power from the battery module into AC power and supply it to the mains power. The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the low voltage threshold of the single cell, the capacity of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module, and the battery module's... SO C ≥ Low threshold of battery module capacity.

[0023] Preferably, when there is mains power, the battery module meets the third preset condition and the current mains electricity price is within the non-minimum electricity price period of the day, the energy-saving control module controls the conversion module to convert the DC power from the battery module into AC power and supply it to the mains power.

[0024] Preferably, when the mains power is available, the battery module meets the third preset condition, and the current mains power price is during the period of the lowest electricity price of the day, the energy-saving control module controls the conversion module to not operate, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives the regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0025] Preferably, ;

[0026] In the formula, Indicates the maximum capacity of the battery module. This indicates the amount of electricity required for all elevators to operate normally during the longest historical power outage in the local area. This indicates the electricity required for all elevators to operate normally during non-minimum electricity price periods on that day; In the formula, Y represents the rated capacity of each cell, Y represents the number of parallel battery packs in the battery module, and X represents the number of cells connected in series in each battery pack.

[0027] in, In the formula, This indicates the longest power outage in the local area's history. Indicates the first i The maximum power of the elevator, where N represents the number of elevators. i =1,2,…,N;

[0028] in, In the formula, This indicates the duration of the non-minimum electricity price period on that day.

[0029] Preferably, when all elevators are under maintenance and stopped, the energy-saving control module controls the circuit breaker and each contactor group to disconnect.

[0030] Preferably, when there is mains power, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module or mains power, and controls the battery module to maintain the working mode; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to mains power, and controls the conversion module to convert the mains power into DC power and charge the battery module until the battery module meets the second preset condition, and controls the battery module to maintain the normal working mode.

[0031] The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the low voltage threshold of the single cell, and the SOC of any single cell in the battery module is also greater than or equal to the SOC of the single cell. ≥ Low threshold of single cell capacity, total voltage of battery module ≥ low voltage threshold of battery module and SOC of battery module ≥ low threshold of battery module capacity;

[0032] The second preset condition is that the voltage of any single cell in the battery module is greater than the single cell voltage regulation threshold, the SOC of any single cell in the battery module is greater than the single cell capacity high threshold, the total voltage of the battery module is greater than the battery module high voltage threshold, or the SOC of the battery module is greater than the battery module capacity high threshold.

[0033] The first preset condition is that the voltage of any single cell in the battery module is less than the low voltage threshold of the single cell and the state of charge (SOC) of any single cell in the battery module. < Low threshold for single cell capacity, total voltage of battery module < low voltage threshold for battery module, or SOC of battery module < low capacity threshold for battery module.

[0034] Preferably, when the mains power fails, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module and controls the battery module to maintain the working mode; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module and controls the battery management system in the battery module to power off and start the system hibernation mode.

[0035] The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the low voltage threshold of the single cell, and the SOC of any single cell in the battery module is also greater than or equal to the SOC of the single cell. ≥ Low threshold of single cell capacity, total voltage of battery module ≥ low voltage threshold of battery module and SOC of battery module ≥ low threshold of battery module capacity;

[0036] The first preset condition is that the voltage of any single cell in the battery module is less than the low voltage threshold of the single cell and the state of charge (SOC) of any single cell in the battery module. < Low threshold for single cell capacity, total voltage of battery module < low voltage threshold for battery module, or SOC of battery module < low capacity threshold for battery module.

[0037] Preferably, after the system hibernation mode is activated, the energy-saving control module is also used to automatically wake up every T time interval to detect whether the battery module meets the second preset condition; if the battery module meets the second preset condition, the energy-saving control module controls the exit of the system hibernation mode and switches the power supply of the auxiliary power supply module to the battery module, controlling the battery module to maintain the working mode; wherein, the second preset condition is that the voltage of any single cell in the battery module is greater than the single cell voltage regulation threshold, the SOC of any single cell in the battery module is greater than the single cell capacity high threshold, the total voltage of the battery module is greater than the battery module high voltage threshold, or the SOC of the battery module is greater than the battery module capacity high threshold.

[0038] Preferably, after the system hibernation mode is activated, the energy-saving control module is also used to automatically wake up every T time interval to detect whether the elevator has resumed operation; if the elevator resumes operation, the energy-saving control module controls the exit of the system hibernation mode, controls the circuit breaker and each contactor group to close, controls the battery management system of the battery module to operate normally, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0039] Preferably, during the process of controlling the battery module to maintain its working mode, the energy-saving control module is also used to detect whether the elevator has resumed operation; if the elevator resumes operation, the energy-saving control module controls the circuit breaker and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0040] In a second aspect, the present invention also proposes an elevator energy-saving control method, which is applied to the elevator energy-saving control system described in any one of the first aspects, including: acquiring mains power information and battery module power information;

[0041] Based on the mains power information and the battery module's power information, the system controls the coordinated operation of the battery module, conversion module, and auxiliary power supply module to achieve energy-saving power consumption for at least one elevator.

[0042] The proposed elevator energy-saving control system and method can add electrical connections to the existing elevator electrical system without altering its fundamental electrical structure. An auxiliary power supply module provides power to the conversion module and energy-saving control module throughout their entire lifecycle, effectively preventing the system from failing during mains power outages. Furthermore, the control module simultaneously acquires mains power information and battery module power information, coordinating the operation of the battery module, conversion module, and auxiliary power supply module to achieve energy-saving power consumption for at least one elevator. This ensures mutual charging and discharging between the battery module and the elevator, allowing each elevator to draw power from both the mains and the battery module. The elevator's regenerative energy can recharge the battery module, and the battery module can also supply power back to the mains grid for arbitrage, effectively improving the economic efficiency of elevator power consumption and reducing electricity costs. Moreover, it effectively ensures the electrical safety of elevators under maintenance; if one elevator malfunctions, the others can continue to operate normally. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of an elevator energy-saving control system in one embodiment of the present invention.

[0044] Figure 2This is a power supply diagram of the auxiliary power supply module in one embodiment of the present invention.

[0045] Figure 3 This is a schematic diagram of power flow during the period of lowest electricity price on a given day, as proposed in one embodiment of the present invention.

[0046] Figure 4 This is a schematic diagram of the battery module discharging into the elevator during a power grid outage, as proposed in one embodiment of the present invention.

[0047] Figure 5 This is a schematic diagram of an elevator charging a battery module during a power outage, as proposed in one embodiment of the present invention.

[0048] Figure 6 This is a schematic diagram of the battery module discharging into the elevator during a period when the electricity price is not at its lowest on the day of the invention, according to one embodiment of the present invention.

[0049] Figure 7 This is a schematic diagram of an elevator charging a battery module during a period when the electricity price is not at its lowest on a given day, according to one embodiment of the present invention.

[0050] Figure 8 This is a schematic diagram of the power flow of a battery module participating in grid trading arbitrage in one embodiment of the present invention. Detailed Implementation

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] Firstly, such as Figure 1 As shown, this invention proposes an elevator energy-saving control system, comprising: a battery module, a converter module, an auxiliary power supply module, an energy-saving control module, a circuit breaker, and at least one contactor group; the electrode connection terminal of the battery module is connected to the input terminal of the circuit breaker, and the output terminal of the circuit breaker is respectively connected to the input terminal of at least one contactor group, the output terminal of at least one contactor group is used to connect to at least one elevator in a one-to-one correspondence; the input terminal of the auxiliary power supply module is respectively connected to the mains power and the electrode connection terminal of the battery module, and the output terminal of the auxiliary power supply module is respectively connected to the power supply terminal of the energy-saving control module and the power supply terminal of the converter module, the AC side of the converter module is used to connect to the mains power, and the DC side of the converter module is connected to the electrode connection terminal of the battery module; the energy-saving control module is communicatively connected to the battery module, the converter module, the auxiliary power supply module, the circuit breaker, and at least one contactor group.

[0053] The maximum capacity of the battery module is the sum of the electricity required for all elevators to operate normally during the longest power outage in the local grid's history and the electricity required for all elevators to operate normally during the non-minimum electricity price period of the day.

[0054] Specifically, the battery module supplies power to the auxiliary power supply module and at least one elevator; the conversion module converts AC power to DC power and charges the battery module; or, the conversion module converts AC power to DC power and charges the battery module, and converts the DC power from the battery module to AC power and supplies it to the AC power supply; the auxiliary power supply module supplies power to the energy-saving control module and the conversion module, and also controls its power input to switch between AC power and the battery module; the circuit breaker controls the closing and opening of the circuit between the power supply module and all elevators; the contactor group controls the closing and opening of the circuit between the circuit breaker and a specific elevator; the energy-saving control module acquires AC power information and battery module power information, and controls the coordinated operation of the battery module, conversion module, auxiliary power supply module, circuit breaker, and at least one contactor group to achieve energy-saving power consumption in at least one elevator based on the AC power information and battery module power information.

[0055] This invention provides power to the conversion module and energy-saving control module throughout their entire lifecycle via an auxiliary power supply module, effectively preventing the elevator energy-saving control system from failing during mains power outages. Furthermore, the energy-saving control module simultaneously acquires mains power information and battery module power information, and controls the coordinated operation of the battery module, conversion module, and auxiliary power supply module based on this information to achieve energy-saving power consumption for at least one elevator. This ensures that the battery module and elevator can mutually charge and discharge, and each elevator can draw power from both the mains and the battery module. The elevator's regenerative energy can be used to charge the battery module in reverse, and the battery module can also supply power to the mains grid for arbitrage, effectively improving the economic efficiency of elevator power consumption and reducing electricity costs. Moreover, it effectively ensures the electrical safety of elevators under maintenance; if one elevator malfunctions, the others can still operate normally.

[0056] In this embodiment, the mains power information includes either mains power availability or mains power outage. The energy-saving control module can acquire mains power information via a meter or other components capable of obtaining this information. The mains power information also includes mains power price information, which includes: the mains power price during the lowest price period of the day and the mains power price during that period, as well as the mains power price during non-lowest price periods of the day and the mains power price during non-lowest price periods. The energy-saving control module can have the mains power price information pre-set, or it can communicate with an external mains power price information acquisition module to obtain the mains power price information.

[0057] In this embodiment, the battery module's power information includes the battery module's status and voltage. Specifically, the energy-saving control module in this embodiment is also used to acquire the elevator's status information; the energy-saving control module can acquire the status information of each elevator through elevator acquisition points, or it can acquire the status information of each elevator through a communication connection with the controller of each elevator.

[0058] When in operation, the energy-saving control module controls the circuit breaker and each contactor group to close. The energy-saving control module obtains the elevator's status information and the battery module's power information, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges with the elevator.

[0059] The elevator status information includes the number of elevators N, the rated power and real-time power of each elevator, the number of elevators R generating regenerative power, and the number of elevators S using electricity.

[0060] During the operation, the energy-saving control module calculates the total regenerative energy Q generated by elevator R based on the elevator's status information. R And the total energy consumption Q of elevator S s The rechargeable and dischargeable capacities of the battery module are calculated based on its power information; and the total regenerative energy Q generated by elevator R is calculated accordingly. R The total energy consumption Q of elevator S s The rechargeable capacity Q of the battery module 充max and discharge capacity Q 放max The system controls the coordination between the battery module and each contactor group to enable the battery module to discharge to the elevator, receive regenerative energy generated by the elevator's ascent or descent, or remain neither charged nor discharged; where, if Q R Q s And Q R -Q s Q 充max Then control the battery module to receive power to Q. 充max and receives power from the battery module to Q. 充max The contactor group corresponding to elevator R is disconnected; if Q R Q s And Q s - Q R Q 放max Then control the battery module to discharge to the elevator to Q. 放max The battery module discharges to the elevator to Q. 放max The contactor group corresponding to elevator R is disconnected; if Q R = Q sThis prevents the battery module from charging or discharging from the elevator. The contactor group disconnection can be caused by the positive contactor disconnecting, the negative contactor disconnecting, or both contactors disconnecting.

[0061] In one specific embodiment, there are three elevators, namely elevator 1, 2, and 3; the operating states of the three elevators are as follows: elevator 1 is in a stopped, non-operating state, with power consumption Q1=0; elevator 2 is in a heavy-load downward state, generating regenerative energy Q2; and elevator 3 is in a heavy-load upward state, requiring power consumption Q3. In this case, the energy-saving control module controls the contactor on elevator 1 to open, preventing charging and discharging of elevator 1; and controls the contactors on elevators 2 and 3 to remain closed. The rechargeable power of the battery module is... Rated capacity, Rated capacity, of which SOC Bth低 The battery module capacity is at a low threshold.

[0062] When Q2 > Q3 and Q2 - Q3 > Q 充max Then the energy-saving control module controls the battery module to charge, and controls the contactor on elevator 2 to disconnect when the power reaches Q_charge_max.

[0063] When Q2 < Q3 and Q3 - Q2 > Q 放max Then the energy-saving control module controls the battery module to discharge, and discharges when the battery level reaches Q. 放max If so, the contactor on elevator 2 will disconnect.

[0064] In another specific embodiment, when there are three elevators, namely elevator 1, elevator 2, and elevator 3; wherein elevator 1 and elevator 2 are in a heavy-load downward state, generating regenerative energy Q1 and Q2 respectively, and elevator 3 is in a heavy-load upward state, requiring power Q3; then the contactors controlling elevator 2 and elevator 3 are in a closed state, wherein the rechargeable amount of the battery module is... Rated capacity, discharge capacity Rated capacity;

[0065] When Q1+Q2 > Q3 and Q1 + Q2 - Q3 > Q 充max Then the energy-saving control module monitors the battery module's charging level to reach Q. 充max Then the contactors on elevators 1 and 2 will be disconnected;

[0066] When Q1+Q2 < Q3 and Q3 - (Q1+Q2) > Q 放max Then the energy-saving control module monitors the battery module's discharge capacity to reach Q. 放max If this happens, the contactors on elevators 1 and 2 will disconnect.

[0067] With this configuration, this embodiment can fully utilize the regenerative energy generated by elevator R to power elevator S, effectively saving energy.

[0068] like Figure 2 In one embodiment, when the mains power fails, the auxiliary power supply module switches its power input to the battery module. The energy-saving control module controls the conversion module to remain inactive and closes the circuit breaker and contactor group. It also controls the battery module and contactor group to cooperate so that the battery module discharges to the elevator, receives regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges. Since the conversion module and energy-saving control module require auxiliary power throughout their entire life cycle, this embodiment effectively prevents the elevator energy-saving control system from failing to operate during a mains power outage. While ensuring the elevator's normal operation, it fully realizes the recovery of regenerative energy, maximizing energy savings.

[0069] In one specific embodiment, each contactor group is always in a closed state, so that the battery module automatically discharges to the elevator or receives regenerative energy generated by the elevator, or maintains a constant charge-discharge relationship with the elevator. i When the elevator goes up or down, the first i The elevator's connection point will generate voltage. V Ci ;in, i =1~N. The voltage of the battery module is V B ， When the mains power fails and the energy-saving control module does not operate the conversion module, and the circuit breaker and all contactor groups are closed, if V Ci < V B The battery module is also used to automatically supply power to the first... i Elevator discharge, power flow direction as follows Figure 4 As shown; where, V Ci Indicates the first i elevator voltage, V B Indicates the rated voltage of the battery module; if V Ci > V B The battery module is also used for automatic storage of the first battery. i The regenerative energy generated when the elevator goes up or down flows in the following direction: Figure 5 As shown.

[0070] In another specific embodiment, by controlling the amount of charge or discharge of the battery module and the disconnection of the contactor corresponding to the elevator that generates regenerative energy, the battery module can discharge to the elevator, receive regenerative energy generated by the elevator rising or falling, or remain charged and discharged between the battery module and the elevator.

[0071] In this embodiment, during the coordinated operation, when the mains power is available, the energy-saving control module controls the auxiliary power supply module to switch its power input from mains power to the battery module or vice versa. At this time, the energy-saving control module can either activate the conversion module to convert mains power into DC power to charge the battery module, or it can control the conversion module to remain inactive to maintain the battery module's state.

[0072] Among them, when there is mains power and the energy-saving control module controls the conversion module to not operate, if V Ci < V B The battery module is also used to automatically supply power to the first... i Elevator discharge, power flow direction as follows Figure 6 As shown; if V Ci > V B The battery module is also used for automatic storage of the first battery. i The regenerative energy generated when the elevator goes up or down flows in the following direction: Figure 7 As shown.

[0073] In this embodiment, when the mains power is available and the battery module meets the third preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module, and controls the circuit breaker and each contactor group to close, and controls the conversion module to not operate and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator, or controls the conversion module to operate to invert the DC power of the battery module into AC power and supply it to the mains power; wherein, the third preset condition is that the voltage of any single cell in the battery module is ≥ the low voltage threshold of the single cell, the capacity of any single cell in the battery module is ≥ the low capacity threshold of the single cell, the total voltage of the battery module is ≥ the low voltage threshold of the battery module and the battery module's voltage is ≥ the low voltage threshold of the battery module and the battery module's voltage is ≥ the low voltage threshold of the battery module. SO C ≥ Low threshold of battery module capacity.

[0074] In a further embodiment, when the mains power is available, the battery module meets the third preset condition and the current mains power price is in a period of non-minimum price for the day, the energy-saving control module controls the conversion module to convert the DC power from the battery module into AC power and supply it to the mains power.

[0075] In a further embodiment, when the mains power is available, the battery module meets the third preset condition, and the current mains power price is during the period of the lowest electricity price of the day, the energy-saving control module controls the conversion module to not operate, and controls the battery module and the contactor group to cooperate so that the battery module supplies power to the elevator or receives the regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0076] When the energy-saving control module controls the converter module to invert the DC power from the battery module into AC power and supply it to the mains power, the energy-saving control module controls the converter module and the battery module to cooperate according to the discharge power. Discharging into the mains power grid; among which, Power flow such as Figure 8 As shown.

[0077] In one specific embodiment, when the mains power is available and the battery module meets the first preset condition, the energy-saving control module controls the auxiliary power supply module to switch its power input from the battery module to the mains power, and controls the conversion module to convert the mains power into DC power to charge the battery module; the first preset condition is that the voltage of any single cell in the battery module is less than the low voltage threshold of the single cell, the capacity of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

[0078] During the process of converting AC power to DC power to charge the battery module, when the battery module meets the second preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module, and controls the conversion module to remain inactive. The module also controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator, receives regenerative energy generated by the elevator's ascent or descent, or remains neither charged nor discharged within the elevator shaft. The second preset condition is that the voltage of any single battery cell is greater than the single battery cell's voltage regulation threshold, and the state of charge (SOC) of any single battery cell is greater than the single battery cell's high capacity threshold SOC. th The total voltage of the battery module is greater than the high voltage threshold of the battery module, or the state of charge (SOC) of the battery module is greater than the high capacity threshold SOC of the battery module. Bth高 .

[0079] Therefore, it can be seen that the auxiliary power supply module in this embodiment receives AC mains power as its input. The auxiliary power supply module converts AC mains power into low-voltage electricity to provide auxiliary power to the conversion module and energy-saving control module; the conversion module converts AC mains power into DC power to charge the battery module. At this time, the elevator can draw power from the AC mains to operate normally, and the power flow is as follows: Figure 3 As shown. This embodiment can utilize mains power to charge the battery and supply power to the elevator in a timely manner when the first preset condition is met, thus preventing the battery module from running out of power.

[0080] In a further embodiment, when the mains power is available and the battery module meets the first preset condition, the energy-saving control module also controls the circuit breaker and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges with the elevator. This embodiment is configured such that while charging using mains power, the energy generated by the elevator's ascent or descent can be used to charge the battery module, which is in a depleted state.

[0081] In a further embodiment, when the mains power is available and the battery module meets the first preset condition, the energy-saving control module also controls the circuit breaker and each contactor group to disconnect, using only the mains power for charging, while the battery module does not discharge to the elevator.

[0082] During the process of converting AC power to DC power to charge the battery module, when the battery module meets the third preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module; the energy-saving control module controls the circuit breaker and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator; wherein, the third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the low voltage threshold of the single cell, the capacity of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module, and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module.

[0083] When the mains power is available, the first preset condition is met, and the current mains power price is during the period of the lowest electricity price of the day, the energy-saving control module controls the conversion module to convert the mains power into DC power to charge the battery module. At the same time, the battery module is controlled to automatically receive the regenerative energy generated by the elevator going up or down.

[0084] With this configuration, this embodiment can charge the battery module by utilizing both mains power and the regenerative energy generated by the elevator's ascent or descent when the mains electricity price is at its lowest point of the day. This avoids the battery module being in a state of long-term underpowerment, reduces electricity costs, and improves battery economics.

[0085] In order to improve the battery capacity of the battery module, during the charging process at preset times, in this embodiment, during the process of converting AC power to DC power to charge the battery module at predetermined times, the energy-saving control module also controls the battery module to perform charging balance.

[0086] Specifically, during the process of converting AC power to DC power to charge the battery module at predetermined intervals, when the battery module... SOC Reaching the high threshold of battery module capacity SOC Bth高 The energy-saving control module will control the battery module's SOC Achieving SOC Bth高 The time is recorded as T 充 ;

[0087] Calculate the battery module SO C reaches SOC Bth高 The time difference between the time of the lowest electricity price period and the time of the end of the period. T 余 ;in, T 余 = T 低结 - T 充 , T 低结 This indicates the end time of the period with the lowest electricity price for the day;

[0088] like T 余 > T 均衡min And SOC Bth高 If the battery level is less than 100%, the energy-saving control module will control the conversion module to continue charging the battery module, and simultaneously control the elevator i, which generates regenerative power, to charge the battery module until the battery module reaches its full capacity. SO C reaches 100% or the battery module meets the second preset condition; whereby... T 均衡min The shortest time required for full-domain OCV calibration and equalization of the battery module cells;

[0089] When the battery module's SOC reaches 100% or the battery module meets the second preset condition, the energy-saving control module controls the converter module to stop operating, thereby stopping the use of mains power to charge the battery module, and controls the battery module to activate the cell-wide OCV calibration equalization until... T 余 Finish;

[0090] like T 余 > T 均衡min And SOC Bth高 = 100%, then the energy-saving control module controls the battery module to activate the cell-wide OCV calibration equalization until... T 余 Finish;

[0091] like T 余 ≤ T 均衡min Then the energy-saving control module controls the battery module to activate the cell-wide OCV calibration equalization until... T 余 Finish.

[0092] Because elevators operate in complex states, including standby, descent, and ascent. i When the elevator is in operation, the voltages at its connection terminals (positive and negative terminals) are respectively Ci+ and Ci- , i It is any positive integer from 1 to N, where N is the number of elevators. Where, the... i The voltage across the elevator throughout its operation Ci+ and Ci- All in [V cmin V cmax ] Scope, number i The maximum power of the elevator is .

[0093] The longest power outage in the local city's history (T) 市停 When the mains power fails, the amount of electricity required for all elevators to operate normally during the longest historical mains power outage in the area is: ;

[0094] The duration of the local grid electricity price's lowest daily rate period is T. 低 The duration of the non-minimum electricity price period on that day is T. 非谷 =24-T 低 The electricity required for all elevators to operate normally during the non-minimum electricity price period on that day is: Therefore, the maximum capacity of the battery module required in this embodiment can be expressed as: , This indicates the maximum capacity of the battery module.

[0095] Assume the rated voltage of each cell is V. B额 The rated voltage range is [V Bmin V Bmax The rated capacity is C. B额 Throughout the elevator's operation, the battery module is slowly charged and discharged, meaning the battery module's... SOC In [SOC] Bth低 SOC Bth高 If the battery is operating stably, then the number of cells connected in series in each battery pack is... Configure it as follows: ;in, choose and The largest one, namely Therefore, the number of battery packs required for the battery module can be determined. for .

[0096] Therefore, the battery module in this embodiment includesY a battery pack, Y a plurality of battery packs are connected in parallel; wherein, each battery pack includes X a plurality of battery cells, X a plurality of battery cells are connected in series, and can ensure the normal operation of the elevator when the power supply fails.

[0097] Specifically, the energy-saving control module and the battery module in this embodiment are communicatively connected through CAN or daisy chain; the energy-saving control module and the conversion module are communicatively connected through CAN or RS485 or Ethernet port, and can be controlled and detected through dry contacts; the energy-saving control module and the auxiliary power supply module are controlled and detected through dry contacts, and can also be communicatively connected through CAN or RS485 or Ethernet port.

[0098] Specifically, the circuit breaker and at least one contactor group are controlled and detected through dry contacts with the energy-saving control module.

[0099] In this embodiment, a fuse group is further connected between each contactor group and the corresponding elevator.

[0100] It should be understood that the electrode connection end of the battery module in this embodiment is used as an input end and can also be used as an output end. The electrode connection end of the battery module in this embodiment includes a positive terminal and a negative terminal. Similarly, the input end and the output end of the circuit breaker both include positive and negative terminals, each contactor group includes a positive contactor and a negative contactor, each fuse group includes two fuses, one fuse is connected between the corresponding positive contactor and the positive connection end of the corresponding elevator, and the other fuse is connected between the corresponding negative contactor and the negative connection end of the corresponding elevator.

[0101] In this embodiment, the energy-saving control module is further configured to obtain the status of each elevator; wherein, the status of the elevator includes working or being under maintenance;

[0102] When K all the elevators K are in the maintenance state, the energy-saving control module is further configured to control the contactor group corresponding to the elevator to disconnect; wherein, 1 ≤ K <N, and N is the number of elevators;

[0103] When all elevators are in the maintenance state, the energy-saving control module is further configured to control the circuit breaker and all contactor groups to disconnect, so as to facilitate maintenance and ensure electrical safety.

[0104] When some elevators R among the N elevators are in the maintenance state, the redundant capacity converted into the battery module is , wherein, r= 1, 2,..., R; , This indicates the duration of the non-minimum electricity price period on that day. Indicates the first i The elevator's maximum power.

[0105] In this embodiment, when all elevators are under maintenance and stopped, the energy-saving control module controls the circuit breaker and each contactor group to disconnect.

[0106] In a further embodiment, when there is mains power, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module or mains power, and controls the battery module to maintain the working mode; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to mains power, and controls the conversion module to convert the mains power into DC power and charge the battery module until the battery module meets the second preset condition, and controls the battery module to maintain the normal working mode.

[0107] The first preset condition is that the voltage V of any single cell in the battery module is less than the low voltage threshold V of the single cell. th欠 SOC of any single cell in the battery module Low threshold SOC of single battery cell th低 The total voltage V of the battery module B Less than the low voltage threshold V of the battery module BTH低 Or the SOC of the battery module is less than the low threshold SOC of the battery module capacity. Bth低 ;

[0108] The second preset condition is that the voltage V of any single cell in the battery module is greater than the single cell's voltage regulation threshold V. th稳 The state of charge (SOC) of any single cell in the battery module is greater than the high threshold SOC of the single cell. th高 The total voltage V of the battery module B Battery module high voltage threshold V BTH高 Or the battery module's SOC capacity exceeds the battery module's high SOC capacity threshold. Bth高 ;

[0109] The third preset condition is that the voltage V of any single cell in the battery module is greater than or equal to the low voltage threshold V of the single cell. th欠 SOC of any single cell in the battery module ≥ Low threshold SOC of single cell capacity th低 The total voltage V of the battery module B ≥ Battery module low voltage threshold V BTH低 Furthermore, the SOC of the battery module is greater than or equal to the low threshold SOC of the battery module capacity. Bth低 .

[0110] In a further embodiment, when the mains power fails, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module and controls the battery module to maintain the working mode; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module and controls the battery management system in the battery module to power off and start the system hibernation mode.

[0111] In a further embodiment, after the system hibernation mode is activated, the energy-saving control module is also used to automatically wake up every T time period to detect whether the battery module meets the second preset condition; if the battery module meets the second preset condition, the energy-saving control module controls the exit of the system hibernation mode and switches the power supply of the auxiliary power supply module to the battery module, controlling the battery module to maintain the working mode.

[0112] In a further embodiment, after the system hibernation mode is activated, the energy-saving control module is also used to automatically wake up every T time interval to detect whether the elevator has resumed operation; if the elevator resumes operation, the energy-saving control module controls the exit of the system hibernation mode, controls the circuit breaker and each contactor group to close, controls the battery management system of the battery module to operate normally, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0113] In a further embodiment, while controlling the battery module to maintain its operating mode, the energy-saving control module is also used to detect whether the elevator has resumed operation; if the elevator resumes operation, the energy-saving control module controls the circuit breaker and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

[0114] With this configuration, this embodiment can ensure the electrical safety of all elevators during periods of malfunction or maintenance, and can promptly return to normal operation after the elevators resume operation; moreover, it can prevent battery over-discharge.

[0115] In a further embodiment, the battery module is also used to report battery faults to the energy-saving control module; when the battery module reports a battery fault to the energy-saving control module, the energy-saving control module controls the circuit breaker and all contactor groups to disconnect, so as to ensure the safety of the elevator energy-saving control system.

[0116] Secondly, the present invention also proposes an elevator energy-saving control method, applied to the elevator energy-saving control system described in any one of the first aspects, comprising:

[0117] Obtain mains power information and battery module power information;

[0118] Based on the mains power information and the battery module's power information, the system controls the coordinated operation of the battery module, conversion module, and auxiliary power supply module to achieve energy-saving power consumption for at least one elevator.

[0119] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An elevator energy-saving control system, characterized in that, include: The system includes a conversion module, an auxiliary power supply module, an energy-saving control module, a battery module, at least one contactor group for connection to at least one elevator, and a circuit breaker connected between the battery module and the at least one contactor group. The battery module is connected to at least one elevator via a circuit breaker and at least one group of contactors, and the mains power is connected to at least one elevator. The auxiliary power supply module is used to power the energy-saving control module and the conversion module, and to control the switching of their power input between mains power and battery module. The conversion module is used to charge the battery module with mains power during the period of lowest electricity price of the day, and to convert the DC power of the battery module into AC power and deliver it to the mains power according to the discharge power during the period of non-lowest electricity price of the day. The energy-saving control module is used to acquire mains power information and battery module power information, and control the coordinated operation of the battery module, converter module, auxiliary power supply module, circuit breaker and at least one contactor group to achieve energy-saving power consumption of at least one elevator based on the mains power information and battery module power information. The maximum capacity of the battery module is the sum of the electricity required for all elevators to operate normally during the longest power outage in the local grid and the electricity required for all elevators to operate normally during the non-minimum electricity price period of the day. The discharge power is calculated by summing the longest historical power outage in the local grid with the non-minimum electricity price period of the day, dividing by the non-minimum electricity price period of the day, and then multiplying by the maximum power of the elevator under maintenance.

2. The elevator energy-saving control system according to claim 1, characterized in that, During normal elevator operation, the energy-saving control module controls the circuit breaker and each contactor group to close, and obtains the elevator's status information and the battery module's power information; and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator's ascent or descent, or neither charges nor discharges with the elevator.

3. The elevator energy-saving control system according to claim 2, characterized in that, The elevator status information includes the number of elevators N, the rated power and real-time power of each elevator, the number of elevators R generating regenerative power, and the number of elevators S using electricity. In the matching process, the energy-saving control module calculates the total regenerated energy Q generated by the R-section elevators according to the state information of the elevators R and the total consumed energy Q of the S-section elevators s ; calculates the chargeable capacity Q and the dischargeable capacity Q of the battery module according to the power information of the battery module 充max and the power information of the battery module 放max ; If Q R > Q s and Q R -Q s > Q 充max , then control the contactor group corresponding to the R elevator to be disconnected when the battery module receives power to Q 充max . If Q R Q s And Q s - Q R Q 放max Then, the control battery module discharges to the elevator to Q. 放max The contactor group corresponding to the elevator in section R is disconnected at that time. If Q R = Q s Then, the battery module will not be charged or discharged between itself and the elevator.

4. The elevator energy-saving control system according to claim 1, characterized in that, When the mains power fails, the auxiliary power supply module switches its power input to the battery module. The energy-saving control module controls the conversion module to not operate and the circuit breaker and contactor group to close. It also controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

5. The elevator energy-saving control system according to claim 1, characterized in that, When the mains power is available and the battery module meets the first preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module from the battery module to the mains power, and the energy-saving control module controls the conversion module to convert the mains power into DC power to charge the battery module; the first preset condition is that the voltage of any single cell in the battery module is less than the low voltage threshold of the single cell, the capacity of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module. During the process of converting AC power to DC power to charge the battery module, when the battery module meets the second preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module, and controls the conversion module to not operate. It also controls the battery module and the contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator. The second preset condition is that the voltage of any single battery cell is greater than the single battery cell's voltage regulation threshold, the SOC of any single battery cell is greater than the single battery cell's capacity high threshold, the total voltage of the battery module is greater than the battery module's high voltage threshold, or the battery module's SOC is greater than the battery module's capacity high threshold.

6. The elevator energy-saving control system according to claim 5, characterized in that, When the mains power is available and the battery module meets the first preset condition, the energy-saving control module also controls the circuit breaker and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

7. The elevator energy-saving control system according to claim 5, characterized in that, When the mains power is available and the battery module meets the first preset condition, the energy-saving control module also controls the circuit breaker and each contactor group to disconnect. During the process of converting AC power to DC power to charge the battery module, when the battery module meets the third preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module; the energy-saving control module controls the circuit breaker and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator; wherein, the third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the low voltage threshold of the single cell, the capacity of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module, and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module.

8. The elevator energy-saving control system according to claim 5, characterized in that, During the process of converting AC power to DC power to charge the battery module at predetermined intervals, when the battery module's State of Charge (SOC) reaches the high threshold SOC of the battery module's capacity... Bth高 At that time, the energy-saving control module will bring the battery module's SOC to the required level. Bth高 The time is recorded as T 充 ;calculate T 充 The time difference between the end of the lowest electricity price period and the end of the current day T 余 ;in, T 余 = T 低结 - T 充 , T 低结 This indicates the end time of the period with the lowest electricity price for the day; like T 余 > T 均衡min And SOC Bth高 If the battery level is less than 100%, the energy-saving control module will control the conversion module to continue charging the battery module, and simultaneously control the elevator that generates regenerative power to charge the battery module until the battery module reaches its full capacity. SO C reaches 100% or the battery module meets the second preset condition; whereby... T 均衡min The shortest time required for full-domain OCV calibration and equalization of the battery module cells; When the battery module SO When C reaches 100% or the battery module meets the second preset condition, the energy-saving control module controls the converter module to stop operating, thereby stopping the use of mains power to charge the battery module, and controls the battery module to activate the cell-wide OCV calibration equalization until... T 余 Finish; like T 余 > T 均衡min And SOC Bth高 = 100%, then the energy-saving control module controls the battery module to activate the cell-wide OCV calibration equalization until... T 余 Finish; like T 余 ≤ T 均衡min Then the energy-saving control module controls the battery module to activate the cell-wide OCV calibration equalization until... T 余 Finish.

9. The elevator energy-saving control system according to claim 1, characterized in that, When the mains power is available and the battery module meets the third preset condition, the energy-saving control module controls the auxiliary power supply module to switch the power input of the auxiliary power supply module to the battery module, controls the circuit breaker and each contactor group to close, controls the conversion module to not operate, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator, or controls the conversion module to operate to invert the DC power of the battery module into AC power and supply it to the mains power; wherein, the third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the low voltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module.

10. The elevator energy-saving control system according to claim 1, characterized in that, ； In the formula, Indicates the maximum capacity of the battery module. This indicates the amount of electricity required for all elevators to operate normally during the longest historical power outage in the local area. This indicates the electricity required for all elevators to operate normally during non-minimum electricity price periods on that day; in, In the formula, Y represents the rated capacity of each cell, Y represents the number of parallel battery packs in the battery module, and X represents the number of cells connected in series in each battery pack. in, In the formula, This indicates the longest power outage in the local area's history. Indicates the first i The maximum power of the elevator, where N represents the number of elevators. i =1,2,…,N; in, In the formula, This indicates the duration of the non-minimum electricity price period on that day.

11. The elevator energy-saving control system according to claim 1, characterized in that, When all elevators are under maintenance and stopped, the energy-saving control module controls the circuit breakers and each contactor group to disconnect.

12. The elevator energy-saving control system according to claim 11, characterized in that, When there is mains power, if the battery module meets the third preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to the battery module or mains power, and controls the battery module to maintain the working mode; if the battery module meets the first preset condition, the energy-saving control module also controls the auxiliary power supply module to switch its power input to mains power, and controls the conversion module to convert the mains power into DC power and charge the battery module until the battery module meets the second preset condition, and controls the battery module to maintain the normal working mode. The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the low voltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, and the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module. The second preset condition is that the voltage of any single cell in the battery module is greater than the single cell voltage regulation threshold, the SOC of any single cell in the battery module is greater than the single cell capacity high threshold, the total voltage of the battery module is greater than the battery module high voltage threshold, or the SOC of the battery module is greater than the battery module capacity high threshold. The first preset condition is that the voltage of any single cell in the battery module is less than the low voltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

13. The elevator energy-saving control system according to claim 11, characterized in that, When the mains power fails, if the battery module meets the third preset condition, the energy-saving control module will also control the auxiliary power supply module to switch its power input to the battery module and control the battery module to maintain the working mode; if the battery module meets the first preset condition, the energy-saving control module will also control the auxiliary power supply module to switch its power input to the battery module and control the battery management system in the battery module to shut down and start the system hibernation mode. The third preset condition is that the voltage of any single cell in the battery module is greater than or equal to the low voltage threshold of the single cell, the SOC of any single cell in the battery module is greater than or equal to the low capacity threshold of the single cell, and the total voltage of the battery module is greater than or equal to the low voltage threshold of the battery module and the SOC of the battery module is greater than or equal to the low capacity threshold of the battery module. The first preset condition is that the voltage of any single cell in the battery module is less than the low voltage threshold of the single cell, the SOC of any single cell in the battery module is less than the low capacity threshold of the single cell, the total voltage of the battery module is less than the low voltage threshold of the battery module, or the SOC of the battery module is less than the low capacity threshold of the battery module.

14. The elevator energy-saving control system according to claim 13, characterized in that, When the system hibernation mode is activated, the energy-saving control module is also used to automatically wake up every T time interval to detect whether the battery module meets the second preset condition. If the battery module meets the second preset condition, the energy-saving control module controls the exit of the system hibernation mode and switches the power supply of the auxiliary power supply module to the battery module, controlling the battery module to maintain the working mode. The second preset condition is that the voltage of any single cell in the battery module is greater than the single cell voltage regulation threshold, the SOC of any single cell in the battery module is greater than the single cell capacity high threshold, the total voltage of the battery module is greater than the battery module high voltage threshold, or the SOC of the battery module is greater than the battery module capacity high threshold.

15. The elevator energy-saving control system according to claim 13, characterized in that, After the system hibernation mode is activated, the energy-saving control module is also used to automatically wake up every T time to detect whether the elevator has resumed operation. If the elevator resumes operation, the energy-saving control module controls the exit of the system hibernation mode, controls the circuit breaker and each contactor group to close, controls the battery management system of the battery module to operate normally, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

16. The elevator energy-saving control system according to any one of claims 12-15, characterized in that, During the process of maintaining the battery module in operating mode, the energy-saving control module is also used to detect whether the elevator has resumed operation. If the elevator resumes operation, the energy-saving control module controls the circuit breaker and each contactor group to close, and controls the battery module and contactor group to cooperate so that the battery module supplies power to the elevator or receives regenerative energy generated by the elevator rising or falling, or neither charges nor discharges with the elevator.

17. An elevator energy-saving control method, applied to the elevator energy-saving control system according to any one of claims 1-16, characterized in that, include: Obtain mains power information and battery module power information; Based on the mains power information and the battery module's power information, the system controls the coordinated operation of the battery module, conversion module, and auxiliary power supply module to achieve energy-saving power consumption for at least one elevator.

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