An uninterruptible power supply system

Abstract

This application discloses an uninterruptible power supply system, relating to the field of power supply. The system includes: a power control unit, an aluminum-air battery reactor module, an energy storage start-up battery module, a battery management system, a power conversion unit, and a data acquisition module. The data acquisition unit is used to collect the voltage stability parameters of the mains power and the load power. The battery management system is used to acquire the status parameters of the two battery packs. The power control unit is used to control the power conversion unit and the battery management system based on the voltage stability parameters, load power, status parameters of the aluminum-air battery reactor module, and status parameters of the energy storage start-up battery module, so as to achieve coordinated operation of the mains power, the aluminum-air battery reactor module, and the energy storage start-up battery module. This application uses dual battery packs for coordinated power supply, which can balance the instantaneous response speed for powering the load after a mains power outage with long-term endurance.

Description

Technical Field

[0001] This application relates to the field of power supply, and in particular to an uninterruptible power supply system. Background Technology

[0002] With the iterative development of new energy battery technology, various types of batteries, such as lead-acid batteries, nickel-cadmium batteries, lithium-ion batteries, and fuel cells, have been widely used in different fields. In the field of uninterruptible power supply (UPS), in addition to single-type battery solutions, there has been exploration of dual-battery combination applications, aiming to integrate the performance advantages of different batteries.

[0003] Current uninterruptible power supply (UPS) systems based on single-battery systems face insurmountable technical bottlenecks: traditional lead-acid batteries, used as backup power for UPS systems, have an energy density of only about 0.2 kWh / kg, resulting in bulky equipment, limited battery life, and a cycle life of only 500-1000 charge-discharge cycles, requiring frequent replacement and incurring high maintenance costs. Furthermore, they contain toxic and harmful substances such as lead and cadmium, making them environmentally unfriendly. While single-aluminum-air batteries offer advantages such as high energy density (theoretical value 8.1 kWh / kg) and good environmental performance, their slow start-up response and inability to seamlessly connect to the mains power supply after an outage limit their large-scale application in the UPS field. Summary of the Invention

[0004] The purpose of this application is to provide an uninterruptible power supply system that can achieve the dual goals of "instantaneous response + long battery life" through dual-battery collaborative control.

[0005] To achieve the above objectives, this application provides the following solution: This application provides an uninterruptible power supply system, the uninterruptible power supply system comprising: Power control unit, aluminum-air battery reaction module, energy storage start-up battery module, battery management system, power conversion unit and data acquisition module; The data acquisition module is connected to the mains power, the load, and the power control unit respectively. The data acquisition unit is used to collect the voltage stability parameters of the mains power and the load power, and send the voltage stability parameters and the load power to the power control unit. The battery management system is connected to the aluminum-air battery reaction module, the energy storage start-up battery module, and the power control unit respectively; the battery management system is used to obtain the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module, and send the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module to the power control unit; The control terminal of the power conversion unit is connected to the power control unit. The first input terminal and the second input terminal of the power conversion unit are respectively connected to the mains power and the aluminum-air battery reaction module. The input and output terminals of the power conversion unit are connected to the energy storage start-up battery module. The output terminal of the power conversion unit is connected to the load. The power control unit is used to control the power conversion unit and the battery management system according to the voltage stability parameters, the load power, the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module, so as to realize the coordinated operation of the mains power, the aluminum-air battery reaction module and the energy storage start-up battery module.

[0006] The power conversion unit includes a first switch, a second switch, a third switch, an AD / DC unit, an inverter unit, and a static switch; The first terminal of the first switch is connected to the output terminal of the mains power, the second terminal of the first switch is connected to one terminal of the static switch and the input terminal of the AD / DC unit, the output terminal of the AD / DC unit is connected to the input terminal of the inverter unit, the output terminal of the inverter unit is connected to the load, and the other terminal of the static switch is connected to the load. The first terminal of the second switch is connected to the output terminal of the aluminum-air battery reaction module, and the second terminal of the second switch is connected to the input terminal of the inverter unit. The first terminal of the third switch is connected to the output terminal of the energy storage start-up battery module, and the second terminal of the third switch is connected to the input terminal of the inverter unit.

[0007] In one embodiment of this application, the power conversion unit further includes: a DC / DC voltage regulator module; The input terminal of the DC / DC voltage regulator module is connected to the second terminal of the second switch and the second terminal of the third switch, respectively, and the output terminal of the DC / DC voltage regulator module is connected to the input terminal of the inverter unit.

[0008] In controlling the power conversion unit based on the voltage stability parameters, the load power, the state parameters of the aluminum-air battery reactor module, and the state parameters of the energy storage start-up battery module to achieve coordinated operation of the mains power, the aluminum-air battery reactor module, and the energy storage start-up battery module, the power control unit is specifically used for: When the voltage stability parameter indicates that the mains power is normal, the control power conversion unit closes the first switch and the static switch, and opens the second switch and the third switch to supply power to the load using the mains power bypass power supply mode. At the same time, the control battery management system keeps the aluminum-air battery reaction module in offline standby state, and the energy storage start-up battery module enters the float charge maintenance state.

[0009] The power control unit is also used for: When the voltage stability parameter indicates an abnormality in the mains power, the power conversion unit is controlled to open the first switch and the static switch and close the third switch, using the energy storage start-up battery module to supply power, and simultaneously triggering the aluminum-air battery reaction module to start. When the voltage of the aluminum-air battery reaction module reaches a preset working threshold, the power conversion unit is controlled to use the aluminum-air battery reaction module and the energy storage start-up battery module to supply power in a coordinated manner.

[0010] When the voltage of the aluminum-air battery reaction module reaches a preset operating threshold, the power conversion unit is controlled to use the aluminum-air battery reaction module and the energy storage start-up battery module to supply power in a coordinated manner, specifically including: When the load power is less than the rated power of the aluminum-air battery reaction module, the power conversion unit is controlled to open the first switch, the static switch and the third switch, and close the second switch, so that only the aluminum-air battery reaction module is used for power supply. When the load power is greater than or equal to the rated power of the aluminum-air battery reaction module, the power conversion unit is controlled to open the first switch and the static switch, and close the second switch and the third switch, while using the aluminum-air battery reaction module and the energy storage start-up battery module to supply power.

[0011] In one embodiment of this application, the uninterruptible power supply system further includes a cloud platform; The cloud platform is connected to the data acquisition module and the battery management system respectively, and is used to store voltage stability parameters, load power, status parameters of aluminum-air battery reaction module and status parameters of energy storage start-up battery module. The cloud platform is also connected to the power control unit and is used to send maintenance commands or forced start commands to the aluminum-air battery reactor module. When the power control unit receives a forced start command for the aluminum-air battery reactor module, it controls the power conversion unit to open the first switch, the static switch, and the third switch, and close the second switch, using only the aluminum-air battery reactor module for power supply. When the power control unit receives a maintenance command and the status parameters of the aluminum-air battery reactor module are normal, it controls the power conversion unit to open the first switch, the static switch, and the third switch, and close the second switch, using the aluminum-air battery reactor module for power supply and performing maintenance on the energy storage start-up battery.

[0012] In one embodiment of this application, the uninterruptible power supply system further includes a backup battery pack, the output terminal of which is connected to the first terminal of a fourth switch, and the second terminal of the fourth switch is connected to the input terminal of the inverter unit.

[0013] The power control unit is also used to determine whether the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module are abnormal. When the status parameters of the aluminum-air battery reaction module or the energy storage start-up battery module are abnormal, the power conversion unit is controlled to disconnect the first switch, the static switch, the second switch and the third switch, and close the fourth switch to start the backup battery pack to supply power. When the status parameters of the aluminum-air battery reaction module and the energy storage start-up battery module are both abnormal, the power conversion unit is controlled to shut down the inverter unit.

[0014] The energy storage start-up battery module is a lithium titanate battery pack or a lithium iron phosphate battery pack.

[0015] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides an uninterruptible power supply system, which includes: a power control unit, an aluminum-air battery reactor module, an energy storage start-up battery module, a battery management system, a power conversion unit, and a data acquisition module; the data acquisition unit is used to collect the voltage stability parameters of the mains power and the load power; the battery management system is used to acquire the status parameters of the two battery modules; the control terminal of the power conversion unit is connected to the power control unit, the first input terminal and the second input terminal of the power conversion unit are respectively connected to the mains power and the aluminum-air battery reactor module, the input and output terminals of the power conversion unit are connected to the energy storage start-up battery module, and the output terminal of the power conversion unit is connected to the load; the power control unit is used to control the power conversion unit and the battery management system according to the voltage stability parameters, the load power, and the status parameters of the two battery modules, so as to realize the coordinated operation of the mains power, the aluminum-air battery reactor module, and the energy storage start-up battery module. In this application, the energy storage start-up battery pack, such as the lithium titanate battery pack, has the characteristics of fast discharge speed, no voltage hysteresis, 0ms response and high discharge rate, ensuring that it can immediately cooperate with the inverter to ensure power supply continuity when the mains power is interrupted; the aluminum air battery pack has the advantages of low maintenance requirements and high energy density to supplement the endurance capability. Through the coordinated control of the two batteries, the dual goals of "instantaneous response + long endurance" of the uninterruptible power supply system are finally achieved, reducing the cost of equipment upgrading and daily operation and maintenance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an uninterruptible power supply system according to one embodiment of this application.

[0018] Figure 2 This is a power supply flowchart of an uninterruptible power supply system according to this application when the mains power is abnormal. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] This application provides an uninterruptible power supply system, such as... Figure 1 As shown, the uninterruptible power supply system of this application (within the large dashed box in the figure) includes: The power control unit, aluminum-air battery reaction module, energy storage start-up battery module, battery management system, power conversion unit (within the small dashed box in the figure), and data acquisition module; The data acquisition module is connected to the mains power, the load, and the power control unit respectively. The data acquisition unit is used to collect the voltage stability parameters of the mains power and the load power, and send the voltage stability parameters and the load power to the power control unit. The battery management system is connected to the aluminum-air battery reaction module, the energy storage start-up battery module, and the power control unit respectively; the battery management system is used to obtain the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module, and send the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module to the power control unit; The control terminal of the power conversion unit is connected to the power control unit. The first input terminal and the second input terminal of the power conversion unit are respectively connected to the mains power and the aluminum-air battery reaction module. The input and output terminals of the power conversion unit are connected to the energy storage start-up battery module. The output terminal of the power conversion unit is connected to the load. The power control unit is used to control the power conversion unit and the battery management system according to the voltage stability parameters, the load power, the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module, so as to realize the coordinated operation of the mains power, the aluminum-air battery reaction module and the energy storage start-up battery module.

[0022] The power conversion unit includes a first switch, a second switch, a third switch, an AD / DC unit, an inverter unit, and a static switch; The first terminal of the first switch is connected to the output terminal of the mains power, the second terminal of the first switch is connected to one terminal of the static switch and the input terminal of the AD / DC unit, the output terminal of the AD / DC unit is connected to the input terminal of the inverter unit, the output terminal of the inverter unit is connected to the load, and the other terminal of the static switch is connected to the load. The first terminal of the second switch is connected to the output terminal of the aluminum-air battery reaction module, and the second terminal of the second switch is connected to the input terminal of the inverter unit. The first terminal of the third switch is connected to the output terminal of the energy storage start-up battery module, and the second terminal of the third switch is connected to the input terminal of the inverter unit.

[0023] In one embodiment of this application, the power conversion unit further includes: a DC / DC voltage regulator module; The input terminal of the DC / DC voltage regulator module is connected to the second terminal of the second switch and the second terminal of the third switch, respectively, and the output terminal of the DC / DC voltage regulator module is connected to the input terminal of the inverter unit.

[0024] In controlling the power conversion unit based on the voltage stability parameters, the load power, the state parameters of the aluminum-air battery reactor module, and the state parameters of the energy storage start-up battery module to achieve coordinated operation of the mains power, the aluminum-air battery reactor module, and the energy storage start-up battery module, the power control unit is specifically used for: When the voltage stability parameter indicates that the mains power is normal, the control power conversion unit closes the first switch and the static switch, and opens the second switch and the third switch to supply power to the load using the mains power bypass power supply mode. At the same time, the control battery management system keeps the aluminum-air battery reaction module in offline standby state, and the energy storage start-up battery module enters the float charge maintenance state.

[0025] The power control unit is also used for: When the voltage stability parameter indicates an abnormality in the mains power, the power conversion unit is controlled to open the first switch and the static switch and close the third switch, using the energy storage start-up battery module to supply power, and simultaneously triggering the aluminum-air battery reaction module to start. When the voltage of the aluminum-air battery reaction module reaches a preset working threshold, the power conversion unit is controlled to use the aluminum-air battery reaction module and the energy storage start-up battery module to supply power in a coordinated manner.

[0026] When the voltage of the aluminum-air battery reaction module reaches a preset operating threshold, the power conversion unit is controlled to use the aluminum-air battery reaction module and the energy storage start-up battery module to supply power in a coordinated manner, specifically including: When the load power is less than the rated power of the aluminum-air battery reaction module, the power conversion unit is controlled to open the first switch, the static switch and the third switch, and close the second switch, so that only the aluminum-air battery reaction module is used for power supply. When the load power is greater than or equal to the rated power of the aluminum-air battery reaction module, the power conversion unit is controlled to open the first switch and the static switch, and close the second switch and the third switch, while using the aluminum-air battery reaction module and the energy storage start-up battery module to supply power.

[0027] In one embodiment of this application, the uninterruptible power supply system further includes a cloud platform; The cloud platform is connected to the data acquisition module and the battery management system respectively, and is used to store voltage stability parameters, load power, status parameters of aluminum-air battery reaction module and status parameters of energy storage start-up battery module. The cloud platform is also connected to the power control unit and is used to send maintenance commands or forced start commands to the aluminum-air battery reactor module. When the power control unit receives a forced start command for the aluminum-air battery reactor module, it controls the power conversion unit to open the first switch, the static switch, and the third switch, and close the second switch, using only the aluminum-air battery reactor module for power supply. When the power control unit receives a maintenance command and the status parameters of the aluminum-air battery reactor module are normal, it controls the power conversion unit to open the first switch, the static switch, and the third switch, and close the second switch, using the aluminum-air battery reactor module for power supply and performing maintenance on the energy storage start-up battery.

[0028] In one embodiment of this application, the uninterruptible power supply system further includes a backup battery pack, the output terminal of which is connected to the first terminal of a fourth switch, and the second terminal of the fourth switch is connected to the input terminal of the inverter unit.

[0029] The power control unit is also used to determine whether the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module are abnormal. When the status parameters of the aluminum-air battery reaction module or the energy storage start-up battery module are abnormal, the power conversion unit is controlled to disconnect the first switch, the static switch, the second switch and the third switch, and close the fourth switch to start the backup battery pack to supply power. When the status parameters of the aluminum-air battery reaction module and the energy storage start-up battery module are both abnormal, the power conversion unit is controlled to shut down the inverter unit.

[0030] The energy storage start-up battery module is a lithium titanate battery pack or a lithium iron phosphate battery pack, and the backup battery pack is a lead-acid battery pack or a vanadium redox flow battery pack.

[0031] The specific steps for implementing an uninterruptible power supply system are as follows: 1. System Initialization and Parameter Acquisition Steps: After the power control unit starts, it collects core parameters in real time through the battery management unit, including the voltage (U1), current (I1), remaining capacity (SOC1), and temperature (T1) of the lithium titanate energy storage start-up battery; the voltage (U2), current (I2), remaining capacity (SOC2), and temperature (T2) of the aluminum-air battery; and the voltage stability parameters of the AC380V mains power. The acquisition cycle is set to 100ms to ensure the real-time performance of parameters and the accuracy of control. Purpose: To build a system operating status database, providing data support for subsequent mode switching, energy distribution, and safety protection, and enabling early identification of abnormal operating conditions.

[0032] 2. Mains Power Normal Mode Control Procedure: When the power control unit determines that the mains voltage is stable (fluctuation range ≤ ±5%), it controls the static switch to switch to mains bypass power supply mode, enabling direct mains power supply to the load and reducing energy conversion losses. Simultaneously, it controls the aluminum-air battery to remain in offline standby mode, and the energy storage start-up battery enters float charging maintenance mode (charging current ≤ 0.1C), with the AC / DC unit replenishing its power via the DC / DC module. Function: To maximize the utilization of mains power, reduce battery losses, and ensure that the energy storage start-up battery is always in a fully charged standby state.

[0033] 3. Mains power failure mode control steps: (e.g.) Figure 2 As shown, when a mains power outage or excessive voltage fluctuation is detected, the power control unit immediately triggers the energy storage start-up battery to start supplying power with zero-delay response, achieving seamless power supply switching. The power is regulated by the DC / DC module and then delivered to the inverter unit, where it is converted into a stable AC 380V voltage output to the load. Simultaneously, a start command is sent to the aluminum-air battery. When the aluminum-air battery voltage U2 reaches the preset operating threshold (≥24V), the control switch completes the main power supply switchover, with the aluminum-air battery taking over the main power supply task. The energy storage start-up battery stops discharging and resumes float charging (if SOC1 < 90%, the aluminum-air battery replenishes its power via the DC / DC module). Function: To achieve seamless connection between mains power outages and backup power supply, while simultaneously considering instantaneous response speed and long-term endurance.

[0034] 4. Dynamic load allocation steps: The power control unit collects the load power P_load in real time and compares it with the rated output power P_AAB of the aluminum-air battery. Figure 2 As shown, the dynamic power supply adjustment strategy of this application is as follows: ① When P_load < P_AAB, the aluminum-air battery is given priority to power the load, and the surplus power is used to charge the energy storage start-up battery through the DC / DC module; ② When P_load ≥ P_AAB, the dual battery packs are controlled to supply power in parallel, and the output current is dynamically allocated by the battery management unit (satisfying I1 + I2 = P_load / U_out, where U_out is the inverter output voltage) to ensure power supply stability. Function: Optimizes energy utilization efficiency, avoids overload operation of a single battery, and extends battery life.

[0035] 5. Maintenance Mode Control Procedure: When the battery management unit detects an abnormality in the energy storage start-up battery (e.g., SOC1 < 20%, T1 > 60℃) or receives a manual maintenance command, the power control unit first starts the aluminum-air battery and confirms its stable operation (U2, T2 meet preset thresholds). Then, it controls the switch to shut down the charging and discharging circuit of the energy storage start-up battery, switching to a single power supply from the aluminum-air battery. After maintenance is completed, a manual reset command is triggered, and the system returns to the dual-battery collaborative power supply mode. Function: To achieve uninterrupted power supply during battery maintenance, ensuring the continuity of load operation.

[0036] 6. Safety Protection Control Procedures: When the battery management unit detects any abnormal operating condition in any battery module, including overcurrent (I1>5C, I2>2C), overvoltage (U1>58.8V, U2>30V), or overtemperature (T1>65℃, T2>55℃), the power control unit immediately shuts down the charging and discharging circuit of the corresponding battery, simultaneously activates the backup battery pack for power supply, and sends an alarm message to the cloud platform via the 4G module. If all batteries malfunction, the inverter unit shutdown protection is triggered to prevent equipment damage or escalation of safety accidents. Function: To construct multiple safety protection barriers and improve system operational reliability.

[0037] 7. Remote Data Transmission and Storage Steps: The power control unit uploads mains power parameters, battery operating parameters, load parameters, and operating mode information to the cloud platform in real time via a 4G module. Simultaneously, it stores local data through a human-machine interface (storage period ≥ 90 days). The cloud platform can issue remote control commands (such as forcibly starting the aluminum-air battery or switching operating modes) to achieve remote operation and maintenance and fault diagnosis. Benefits: Reduces offline maintenance workload and facilitates operational data traceability, fault analysis, and full lifecycle management.

[0038] The working principle of the uninterruptible power supply system in this application is as follows: When the mains power is normal: Mains power → AC / DC unit (rectified to DC) → splits into two paths: one path supplies power to the inverter unit → load; the other path charges the energy storage start-up battery, keeping the battery fully charged for standby. At this time, the bypass channel is in hot standby mode. If the inverter fails, it will automatically switch to bypass power supply.

[0039] When the mains power is interrupted: the energy storage start-up battery + aluminum-air battery immediately output DC to the inverter unit through the battery interface → the inverter unit continuously outputs stable AC power to the load, realizing zero-interruption power supply (because the load is always powered by the inverter, there is no need to switch).

[0040] When mains power is restored: the AC / DC unit resumes operation, re-supplying the inverter unit and charging the battery to full capacity, and the system automatically returns to normal mode.

[0041] Bypass mode (in case of fault / overload): If the inverter fails or the load is overloaded, the switching switch will immediately switch to the bypass channel, and the mains power will directly supply power to the load, while protecting the internal modules of the uninterruptible power supply.

[0042] Energy storage starting battery + aluminum-air battery operation: The combined battery solution, with its intelligent aluminum-air battery management system, intelligently allocates the energy output of the lithium titanate starter battery and the aluminum-air battery according to the actual needs of the system and the battery status, ensuring that the two operate in parallel efficiently, stably and safely.

[0043] Logic control for switching on / off of energy storage start-up batteries and aluminum-air batteries: The battery management unit installed in the lithium titanate battery can acquire key parameters such as battery voltage, current, remaining charge (SOC), and temperature in real time, thereby understanding the battery's working status. During normal startup, the lithium titanate energy storage starter battery is used for power supply. The information obtained by the battery management unit determines the voltage or SOC of the lithium titanate energy storage starter battery and automatically starts the aluminum-air battery. The battery management unit can rationally allocate the energy output of the energy storage start-up battery and the aluminum-air battery based on the actual needs of the system and the state of the two types of batteries. When the system load is low, i.e., the load power is less than the output power of the aluminum-air battery, the fuel cell can be used to supply power first, while the aluminum-air battery supplies power to the load and charges the energy storage start-up battery at the same time. When the system load is high, both batteries can be used simultaneously to supply power to meet the system's energy requirements. Charge and discharge control: For energy storage start-up batteries, the charging and discharging process is precisely controlled, and the power and status of the energy storage batteries are monitored in real time to avoid overcharging or over-discharging from damaging the battery performance and to ensure that it can work stably and reliably when connected in parallel.

[0044] Battery maintenance output mode: When the energy storage start-up battery needs maintenance, it can receive a start-up aluminum-air battery. After the aluminum-air battery starts up, the energy storage start-up battery can be shut down to perform maintenance on the energy storage start-up battery.

[0045] The battery switching control logic also includes a series of safety protection measures, such as overcurrent protection, overvoltage protection, and overtemperature protection. When the battery system malfunctions, the battery management unit will immediately shut down the battery's charging and discharging circuits to prevent battery damage or safety accidents.

[0046] In one embodiment of this application, the uninterruptible power supply system configuration of an uninterruptible power supply room is as follows: Uninterruptible power supply (UPS) model: RT20C, capacity: 20KVA / 16kW, output: 380VAC, 50Hz; AC input: 380V, AC, 50Hz; Battery input: 384V, DC; Battery parameters: 12V, DC; capacity: 38AH, using 32 cells in series.

[0047] Lithium titanate battery options: The start-up time of an aluminum-air battery is generally 5-10 minutes; we will calculate based on 10 minutes. According to the load conditions: 1. Discharge power calculation: With a load of 16kW and an uninterruptible power supply inverter efficiency of 90%, the inverter power P1 = 16 / 0.9 = 17.8kW; 2. Capacity (C) calculation: In an emergency, with a discharge time of 10 minutes, the required capacity C1 = 17.8 × (10 ÷ 60) = 2.96kWh; Considering the battery charging coefficient of 0.93, aging coefficient of 0.92 (5 years), high current discharge, and temperature coefficient of 0.9 (25℃), the actual battery capacity selected is Ce = 2.96 ÷ 0.93 ÷ 0.92 ÷ 0.9 = 3.85kWh; considering a 10% margin, Ce = 3.85kWh. 1.1 = 4.2 kWh.

[0048] In summary: The recommended battery is a Toshiba 2.3V, 20AH lithium titanate cell, with a discharge rate of 8-10C. It has a capacity of 20AH / 220.8V (operating voltage range DC192-244.8V) and a capacity of 20... 220.8 = 4.42 kWh > 4.22 kWh, which meets the requirements. The battery's continuous discharge rate is 5C (C is the battery capacity; 5C means discharging at 5 times the battery capacity, i.e., the battery discharge power is based on the battery capacity). 5) Design, discharge power 4.2 5 = 21 kW > 17.8 kW, which meets the discharge power requirement. Aluminum-air battery option: 1. Aluminum-air battery power selection: Assuming the uninterruptible power supply inverter efficiency is 90%, P1 = 16 / 0.9 = 17.8kW; 2. Aluminum-air battery capacity selection: Primary battery capacity DC 384V 38Ah = 14.6kWh, the required capacity is based on the original battery configuration C1: = 14.6kWh; lithium battery capacity: 4.42kWh, aluminum-air battery capacity: 14.6 - 4.42 = 10.172kWh; select 80Ah / 32V aluminum-air battery modules, using 6 modules in series, output working DC 192-240V, battery capacity 80... 32 6 = 15.36 kWh, the total battery capacity of the system is 15.36 kWh + 4.42 kWh = 19.78 kWh > 10.172 kWh.

[0049] Traditional uninterruptible power supply (UPS) systems use a large number of lead-acid batteries, resulting in significant maintenance workload. The batteries in UPS systems also have excessively large capacities, often remaining in a float charging state, thus failing to utilize their full potential, and upgrades are costly. This application adopts a lithium titanate battery + aluminum-air battery combination solution. While doubling the battery capacity, it significantly reduces the product's size and weight, making it less than one-third the size and weight of the original lead-acid UPS system. This makes UPS system integration feasible (multiple systems combined would increase battery capacity requirements, and the original installation space was limited; system integration solves the installation space problem). Furthermore, the battery management unit collects battery and system operating parameters in real time, enabling seamless collaborative power supply between the lithium titanate energy storage start-up battery and the aluminum-air battery, while also ensuring rapid response after mains power outages and long-term endurance.

[0050] The advantages of the uninterruptible power supply system and control method described in this application are as follows: 1. Superior Power Continuity and Response Speed: Achieves seamless power supply transition with 0ms after a mains power outage, completely resolving the technical pain points of traditional aluminum-air batteries (slow start-up), single lithium-ion batteries (weak low-temperature performance), and single lead-acid batteries (lagging response). Core Mechanism: Relying on the core technology of "lithium titanate energy storage start-up battery + aluminum-air battery collaborative control," the rapid response characteristics of the lithium titanate battery undertake the instantaneous power supply task, while the aluminum-air battery switches to the main power supply after startup. The dual-battery collaboration ensures uninterrupted power supply; coupled with comprehensive self-testing and standby logic, it ensures that the system is always ready, enhancing emergency response capabilities.

[0051] 2. Long battery life and compact design: With the same power supply capacity, the device size is 40%-60% smaller than traditional lead-acid battery uninterruptible power supplies, meeting the battery life requirements for extended power outages. Core mechanism: Utilizing the core technology of "high-energy-density aluminum-air battery + modular stack design," the aluminum-air battery has a theoretical energy density of 8.1 kWh / kg, far exceeding that of traditional lead-acid batteries, significantly reducing the device size while maintaining the same battery life. The modular design with 9 stacks allows for flexible capacity expansion to adapt to different battery life scenarios.

[0052] 3. High safety and reliability: Safety protection across the entire chain, from materials to system construction, eliminates the risk of fire and explosion. Core mechanism: On one hand, relying on "high-safety lithium titanate battery selection" technology, its excellent thermal stability avoids the risk of thermal runaway; on the other hand, relying on "battery management unit + multi-dimensional sensor monitoring + multi-level protection logic" technology, it achieves early identification and rapid handling of abnormal operating conditions. Combined with a comprehensive self-testing process, it further enhances the reliability of system operation.

[0053] 4. Low maintenance cost and environmentally friendly: Daily maintenance-free operation, low battery replacement frequency, and strong environmental friendliness. Core mechanism: Integrating multiple technologies including "maintenance-free aluminum-air battery characteristics + long cycle life of lithium titanate + environmentally friendly material selection + automatic cleaning and maintenance design," the aluminum-air battery requires no frequent charging and discharging maintenance, and the lithium titanate has a cycle life exceeding 25,000 cycles; the system's automatic cleaning and maintenance mode significantly reduces manual intervention; each battery is free of harmful substances such as lead and cadmium, and the reaction products of the aluminum-air battery are recyclable, meeting the requirements of green development.

[0054] 5. Wide adaptability and high flexibility: Supports dual AC / DC power supply modes, adapting to extreme temperature zones and different load requirements. Core mechanism: Adopts "modular structure design + dual working mode control logic + wide temperature adaptation design" technology. AC / DC working mode switching is achieved through a mode selection switch, and a traditional battery access port is reserved to improve selection flexibility; the heating rod and heat dissipation system are controlled in tandem, enabling the system to operate stably in environments ranging from -40℃ to +70℃, adapting to extreme scenarios; the modular design of 9 fuel cells can flexibly adjust the number of operating cells according to the load power, improving load adaptability.

[0055] 6. High Ease of Operation and Maintenance: Enables remote operation and maintenance and data traceability, reducing operation and maintenance costs. Core Mechanism: Relying on "4G module + human-machine interface + full parameter monitoring and recording" technology, the cloud platform can view the equipment operating status in real time, receive fault alarms, and store more than 90 days of operating data locally for easy traceability and analysis; the automatic cleaning and maintenance mode reduces the workload of offline operation and maintenance, and lowers personnel costs.

[0056] 7. High energy efficiency: Optimized energy distribution reduces losses. Core mechanism: Employing a "dynamic load distribution control method + precise electrolyte temperature control + high-efficiency heat dissipation system" technology, the power supply is intelligently adjusted based on the dynamic matching between the load power and the rated power of the aluminum-air battery; the heating rod and heat dissipation system work together to control the electrolyte temperature, ensuring stable battery reaction efficiency; efficient liquid circulation and heat dissipation design reduce energy loss and improve the overall energy efficiency of the system.

[0057] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0058] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0059] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An uninterruptible power supply system, characterized in that, The uninterruptible power supply system includes: a power control unit, an aluminum-air battery reaction module, an energy storage start-up battery module, a battery management system, a power conversion unit, and a data acquisition module; The data acquisition module is connected to the mains power, the load, and the power control unit respectively. The data acquisition unit is used to collect the voltage stability parameters of the mains power and the load power, and send the voltage stability parameters and the load power to the power control unit. The battery management system is connected to the aluminum-air battery reaction module, the energy storage start-up battery module, and the power control unit respectively; the battery management system is used to obtain the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module, and send the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module to the power control unit; The control terminal of the power conversion unit is connected to the power control unit. The first input terminal and the second input terminal of the power conversion unit are respectively connected to the mains power and the aluminum-air battery reaction module. The input and output terminals of the power conversion unit are connected to the energy storage start-up battery module. The output terminal of the power conversion unit is connected to the load. The power control unit is used to control the power conversion unit and the battery management system according to the voltage stability parameters, the load power, the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module, so as to realize the coordinated operation of the mains power, the aluminum-air battery reaction module and the energy storage start-up battery module.

2. The uninterruptible power supply system according to claim 1, characterized in that, The power conversion unit includes a first switch, a second switch, a third switch, an AD / DC unit, an inverter unit, and a static switch; The first terminal of the first switch is connected to the output terminal of the mains power, the second terminal of the first switch is connected to one terminal of the static switch and the input terminal of the AD / DC unit, the output terminal of the AD / DC unit is connected to the input terminal of the inverter unit, the output terminal of the inverter unit is connected to the load, and the other terminal of the static switch is connected to the load. The first terminal of the second switch is connected to the output terminal of the aluminum-air battery reaction module, and the second terminal of the second switch is connected to the input terminal of the inverter unit. The first terminal of the third switch is connected to the output terminal of the energy storage start-up battery module, and the second terminal of the third switch is connected to the input terminal of the inverter unit.

3. The uninterruptible power supply system according to claim 2, characterized in that, The power conversion unit further includes: a DC / DC voltage regulator module; The input terminal of the DC / DC voltage regulator module is connected to the second terminal of the second switch and the second terminal of the third switch, respectively, and the output terminal of the DC / DC voltage regulator module is connected to the input terminal of the inverter unit.

4. The uninterruptible power supply system according to claim 2, characterized in that, In controlling the power conversion unit based on the voltage stability parameters, the load power, the state parameters of the aluminum-air battery reactor module, and the state parameters of the energy storage start-up battery module to achieve coordinated operation of the mains power, the aluminum-air battery reactor module, and the energy storage start-up battery module, the power control unit is specifically used for: When the voltage stability parameter indicates that the mains power is normal, the control power conversion unit closes the first switch and the static switch, and opens the second switch and the third switch to supply power to the load using the mains power bypass power supply mode. At the same time, the control battery management system keeps the aluminum-air battery reaction module in offline standby state, and the energy storage start-up battery module enters the float charge maintenance state.

5. The uninterruptible power supply system according to claim 4, characterized in that, The power control unit is also used for: When the voltage stability parameter indicates an abnormality in the mains power, the power conversion unit is controlled to open the first switch and the static switch and close the third switch, using the energy storage start-up battery module to supply power, and simultaneously triggering the aluminum-air battery reaction module to start. When the voltage of the aluminum-air battery reaction module reaches a preset working threshold, the power conversion unit is controlled to use the aluminum-air battery reaction module and the energy storage start-up battery module to supply power in a coordinated manner.

6. The uninterruptible power supply system according to claim 5, characterized in that, When the voltage of the aluminum-air battery reaction module reaches a preset operating threshold, the power conversion unit is controlled to use the aluminum-air battery reaction module and the energy storage start-up battery module to supply power in a coordinated manner, specifically including: When the load power is less than the rated power of the aluminum-air battery reaction module, the power conversion unit is controlled to open the first switch, the static switch and the third switch, and close the second switch, so that only the aluminum-air battery reaction module is used for power supply. When the load power is greater than or equal to the rated power of the aluminum-air battery reaction module, the power conversion unit is controlled to open the first switch and the static switch, and close the second switch and the third switch, while using the aluminum-air battery reaction module and the energy storage start-up battery module to supply power.

7. The uninterruptible power supply system according to claim 1, characterized in that, The uninterruptible power supply system also includes a cloud platform; The cloud platform is connected to the data acquisition module and the battery management system respectively, and is used to store voltage stability parameters, load power, status parameters of aluminum-air battery reaction module and status parameters of energy storage start-up battery module. The cloud platform is also connected to the power control unit and is used to send maintenance commands or forced start commands to the aluminum-air battery reaction module to the power control unit. When the power control unit receives a forced start command to the aluminum-air battery reaction module, it controls the power conversion unit to open the first switch, the static switch and the third switch, and close the second switch, so that only the aluminum-air battery reaction module is used for power supply. When the power control unit receives a maintenance command and the status parameters of the aluminum-air battery reaction module are normal, it controls the power conversion unit to open the first switch, the static switch, and the third switch, and close the second switch, using the aluminum-air battery reaction module to supply power and perform maintenance on the energy storage start-up battery.

8. The uninterruptible power supply system according to claim 2, characterized in that, The uninterruptible power supply system also includes a backup battery pack, the output of which is connected to the first terminal of the fourth switch, and the second terminal of the fourth switch is connected to the input terminal of the inverter unit.

9. The uninterruptible power supply system according to claim 8, characterized in that, The power control unit is also used to determine whether the status parameters of the aluminum-air battery reaction module and the status parameters of the energy storage start-up battery module are abnormal. When the status parameters of the aluminum-air battery reaction module or the energy storage start-up battery module are abnormal, the power conversion unit is controlled to disconnect the first switch, the static switch, the second switch and the third switch, and close the fourth switch to start the backup battery pack to supply power. When the status parameters of the aluminum-air battery reaction module and the energy storage start-up battery module are both abnormal, the power conversion unit is controlled to shut down the inverter unit.

10. The uninterruptible power supply system according to claim 1, characterized in that, The energy storage start-up battery module is a lithium titanate battery pack or a lithium iron phosphate battery pack.

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