A preparation method of high-power backup power supply for mine

Abstract

The invention discloses a preparation method of a high-power backup power supply for mining, and belongs to the technical field of backup power supply for mining. The invention solves the problem of insufficient power supply capacity of existing power supplies, by connecting the high-power backup power supply for mining to an external AC power supply, the input power supply is controlled by a CKJ vacuum contactor, when the CKJ vacuum contactor is closed, the AC power supplies power to the transformer, and the three-phase power supply voltage is output through the secondary transformer, and the AC power is converted into DC power by a rectifier, and the DC power is supplied to an inverter and a BJ high-voltage DC relay after filtering, and the BJ high-voltage DC relay is controlled by a charging module to charge a battery module; when the AC power is cut off and the battery module is powered, the inverter outputs AC power to power external mining communication equipment, and the DC power of the battery module provides backup power to the external DC equipment through the input and output control module; ensure the safety of miners and the continuity of production, and improve the continuity and reliability of the operation of mining communication equipment.

Description

Technical Field

[0001] The invention relates to the technical field of mine backup power supplies, in particular to a preparation method of a mine high-power backup power supply. Background Art

[0002] The intrinsically safe backup power supply for mining is an important equipment in mining production. It refers to a power supply equipment that can ensure that its own circuits and power supplies will not cause explosions when flammable gases exist in mines. It is widely used in mines to ensure the normal operation of the power supply and lighting systems in mines to cope with sudden power outages or other power failures, and to ensure the safety of miners and the continuity of mining production. Coal, as an important part of my country's energy, has provided tremendous impetus for national development. The monitoring system is an important guarantee for coal mine safety production, and the backup power supply is an indispensable part of the monitoring system, which can provide reliable and stable emergency guarantees for the monitoring system equipment. At the same time, with the advancement of coal mine intelligence and electrification, important communication equipment such as safety monitoring substations, 4G / 5G base stations, and UWB precise personnel positioning substations in coal mines are all powered by explosion-proof lighting switches.

[0003] Since the existing underground power supply is laid by cables, the distance is long, and there are multiple branches for power supply. There are many departments in charge of underground electrical equipment. When the explosion-proof lighting switch fails, important communication equipment will stop working, which will have an adverse impact on coal mine production safety. There is an urgent need for a high-power backup power supply for backup power supply to provide important communication equipment with 2-12 hours of backup power supply to improve the continuity and reliability of mine communication equipment.

[0004] Therefore, the existing demand is not met, and we propose a method for preparing a high-power backup power supply for mining. Summary of the invention

[0005] The purpose of the present invention is to provide a preparation method of a high-power backup power supply for mining. The high-power backup power supply for mining is connected to an external AC power supply, and the input power supply is controlled by a CKJ vacuum contactor. When the vacuum contactor is closed, the AC power supply supplies power to the transformer, and the three-phase power supply voltage is output through the secondary output of the transformer. The AC power is converted into DC power by a rectifier, and the DC power is supplied to an inverter and a BJ high-voltage DC relay after filtering. The BJ high-voltage DC relay is controlled by a charging module to charge a battery module; when the AC power is off and the battery module is powered, the inverter outputs AC power to power external mining communication equipment, and the DC power of the battery module provides backup power to the external DC equipment through an input and output control module; the safety of miners and the continuity of production are ensured, the continuity and reliability of the operation of mining communication equipment are improved, and the problems raised in the above-mentioned background technology are solved.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for preparing a high-power backup power supply for mining, comprising the following steps:

[0007] Step 1: prepare an explosion-proof housing required for a high-power backup power supply for mining, and install a touch screen for controlling the high-power backup power supply for mining on one side of the explosion-proof housing;

[0008] Step 2: Install the CKJ vacuum contactor, transformer, rectifier, inverter and BJ high-voltage DC relay in the explosion-proof housing in sequence, and then install the battery module in the explosion-proof housing through the fixing plate;

[0009] Step 3: Connect the input end of the CKJ vacuum contactor to the output end of the external AC power supply through a wire, connect the output end of the CKJ vacuum contactor to the input end of the transformer through a wire, and connect the output end of the transformer to the input end of the rectifier through a wire;

[0010] Step 4: The CKJ vacuum contactor, transformer, rectifier, inverter, BJ high-voltage DC relay and battery module are electrically connected to the touch screen in sequence through wires, and a BMS power management system is loaded on the touch screen. The BMS power management system is equipped with an inverter module, a rectifier module, a charging module and an input / output control module. The above four modules are displayed on the touch screen, and the operating status of the above modules is controlled through the touch screen;

[0011] Step 5: Use the inverter module to control the inverter to output AC voltage to the external mining communication equipment, use the rectifier module to control the rectifier to convert the AC power transmitted by the transformer into DC power, and supply the DC power to the inverter and BJ high-voltage DC relay after filtering. Use the charging module to control the BJ high-voltage DC relay to charge the battery module. The battery module uses the input and output control module to output the backup power supply to the external DC equipment, thereby forming a high-power backup power supply for mining.

[0012] Furthermore, the battery module in step 2 is composed of 34 60AH intrinsically safe lithium iron phosphate battery cells connected in series, and the battery module is also connected to a protection board, which is an important component of the BMS power management system and is responsible for managing the charging and discharging status of the battery module.

[0013] Furthermore, the protection board is an important component of the BMS power management system, which is responsible for managing the charging and discharging status of the battery module, including:

[0014] Determine a multi-dimensional electrical property monitoring sensor device based on a monitoring mechanism of the battery module, and configure the multi-dimensional electrical property monitoring sensor device at a charging interface of the battery module;

[0015] Based on the configuration result, the interaction process between the battery module and the external AC power supply is monitored in real time, and when the real-time monitoring result shows that the value of the electrical parameter suddenly changes to zero, it is determined that the external AC power supply is powered off;

[0016] triggering a power supply mechanism of the battery module based on the determination result, and determining the remaining power of each battery cell in the battery module based on the triggering result, and at the same time, determining the minimum reserved power of each battery cell, and determining a constant discharge current value between each battery cell based on the remaining power and the minimum reserved power;

[0017] Determine the discharge temperature protection threshold and the charging temperature protection threshold of the battery module based on the protection mechanism of the battery module, perform the same-level trigger adaptation on the discharge temperature protection threshold and the minimum reserved power, and use the charging temperature protection threshold and the minimum reserved power as the first auxiliary limiting condition based on the adaptation result. At the same time, encapsulate the first auxiliary limiting condition and the constant discharge current value into a battery discharge management mechanism, and control the battery module to output backup power to the external DC device based on the battery discharge management mechanism;

[0018] Monitor the process of the battery module outputting backup power to the external DC device in real time, and interrupt the power supply process of the battery module when the first auxiliary limiting condition is met;

[0019] Determine the power supply recovery state of the external AC power supply based on the interruption result, and determine the maximum charging voltage of each battery cell in the battery module after the power supply is restored;

[0020] Determine a constant charging current value for each battery cell in the battery module based on the maximum charging voltage, and encapsulate the charging temperature protection threshold as a second auxiliary limiting condition and the constant charging current value into a battery charging management mechanism;

[0021] Based on the battery charging management mechanism, balanced charging management is performed on each battery cell in the battery module.

[0022] Furthermore, in the step three, after the input end of the CKJ vacuum contactor is connected to the output end of the external AC power supply, the external AC power supply is used to input AC voltage into the CKJ vacuum contactor; after the output end of the CKJ vacuum contactor is connected to the input end of the transformer, the input AC voltage is controlled by the CKJ vacuum contactor, and after the CKJ vacuum contactor is closed, the AC voltage received by the CKJ vacuum contactor is transmitted to the transformer, and the transformer secondary output three-phase power supply voltage is used, and the three-phase power supply voltage output by the transformer secondary is used to power the inverter module, the rectifier module and the charging module.

[0023] Furthermore, in the step 4, an insulation monitoring module needs to be deployed in the BMS power management system, through which the insulation monitoring module is used to monitor the insulation of the positive and negative circuits transmitted between the rectifier, inverter, BJ high-voltage DC relay and battery module, and the insulation monitoring status is fed back to the touch screen.

[0024] Furthermore, when the inverter is controlled by the inverter module to output AC voltage to the external mining communication equipment in step five, the external AC power supply must be cut off and the inverter must be powered by the battery module to directly output AC voltage to power the external mining communication equipment.

[0025] Furthermore, the inverter module is used to control the inverter to directly output AC voltage to power external mining communication equipment, including:

[0026] Obtain the power supply time of the battery module to the external mine communication equipment and the total load power of the external mine communication equipment, and calculate the power supply of the battery module based on the power supply time and the total load power;

[0027] The battery module is charged based on the power supply result based on the external AC power supply, and the charging efficiency of the battery module is calculated based on the power supply. The specific steps include:

[0028] Calculate the power supply of the battery module according to the following formula:

[0029]

[0030] Among them, M represents the power supply of the battery module; P represents the total load power value of the external mining communication equipment; U represents the power supply voltage value of the battery module; t represents the power supply time of the battery module to the external mining communication equipment;

[0031] The charging efficiency of the battery module is calculated according to the following formula:

[0032]

[0033] Among them, μ represents the charging efficiency of the battery module, and its value range is (0, 1); α represents the battery capacity value of the battery module after charging; M represents the power supply of the battery module; β represents the remaining power value of the battery module after the power supply ends; V represents the charging rate of the battery module; T represents the actual charging time of the battery module; τ represents the error coefficient, and its value range is (0.01, 0.015); e represents the natural constant, and its value is 2.17;

[0034] comparing the calculated charging efficiency with a preset threshold;

[0035] If the calculated charging efficiency is greater than a preset threshold, it is determined that the charging state management of the battery module is qualified;

[0036] Otherwise, it is determined that the charging state management of the battery module is unqualified, and the charging optimization direction and optimization parameters of the battery module are determined based on the calculation results;

[0037] The charging strategy of the battery module is optimized based on the charging optimization direction and optimization parameters.

[0038] Furthermore, in the step three, the outer walls of the wires connecting the CKJ vacuum contactor, transformer, rectifier, inverter and BJ high-voltage DC relay are all covered with an insulating layer, the specification of the wires is 0.05 mm, the insulating layer is made of polyvinyl chloride material, and the thickness of the insulating layer is 0.03 mm.

[0039] Furthermore, in the step 1, after the explosion-proof housing required for the backup power supply is prepared, an internal grounding device and an external grounding device are arranged inside the explosion-proof housing.

[0040] Furthermore, in the step 1, after preparing the explosion-proof enclosure required for the backup power supply, a nameplate, a warning sign, an EX sign, an MA sign and a rectifier control switch need to be installed in sequence on the other side of the explosion-proof enclosure.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. The present invention connects the high-power backup power supply for mining to an external AC power supply and inputs the AC power supply voltage into it. The input power supply is controlled by the CKJ vacuum contactor. When the CKJ vacuum contactor is closed, the AC power supply supplies power to the 4KVA transformer, and the three-phase power supply voltage is output through the secondary transformer. The three-phase power supply voltage is then transmitted to the rectifier module for processing, and the AC power is converted into DC power. After filtering, it is output as multiple DC power channels. While the DC power is supplied to the inverter and the BJ high-voltage DC relay, the load of the single DC power channel is measured to determine whether there is leakage and whether the voltage The output of the high-power backup power supply for mining includes two parts: after the AC power is cut off, under the power supply of the battery module, the inverter directly outputs AC power to power the external mining communication equipment; the DC voltage of the battery module itself has reached DC120V, and the DC power of the battery module provides backup power to the external DC equipment through the input and output control module; thereby ensuring the safety of miners and the continuity of mining production, and improving the continuity and reliability of mining communication equipment.

[0043] 2. The present invention, by determining a multi-dimensional electrical property monitoring sensor device for a battery module and configuring the multi-dimensional electrical property monitoring sensor device at the charging interface of the battery module, realizes real-time and effective monitoring of the charging status of the battery module by an external AC power supply. Secondly, when the external AC power supply is interrupted, the battery module is triggered in time to supply power to the mining equipment, so as to ensure the stable operation of the mining equipment. At the same time, when the battery module is supplying power, the constant discharge current value of the battery module is determined, so as to ensure the balanced discharge of each battery cell in the battery module and protect the battery module from being damaged. Moreover, a battery discharge management mechanism is configured for the discharge process, so as to realize timely interruption of the discharge process of the battery module when there is danger or abnormality. Finally, the power supply recovery state of the external AC power supply is monitored in real time, so as to realize timely and effective charging of the battery module after the power supply is restored, and the constant charging current value is determined during charging. At the same time, a battery charging management mechanism is configured for the charging process, so as to realize real-time and effective monitoring and management of the charging process of the battery module, so as to ensure the charging and discharging reliability of the battery module and provide a reliable power supply guarantee for the mining equipment.

[0044] 3. The present invention calculates the power supply of the battery module and calculates the charging efficiency of the battery module based on the calculated power supply, thereby facilitating effective evaluation of the charging process of the battery module, and when the charging efficiency does not meet the requirements of a preset threshold, it is possible to accurately and effectively confirm the optimization direction and optimization parameters based on the calculation results, thereby achieving accurate and reliable optimization of the charging strategy of the battery module, thereby ensuring the reliability of the battery module as a backup power supply for mining equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the display state of the touch screen in the high-power backup power supply for mining of the present invention;

[0046] Figure 2 It is a side view schematic diagram of a high-power backup power supply for mining of the present invention;

[0047] Figure 3 It is a schematic diagram of another side of the high-power backup power supply for mining of the present invention;

[0048] Figure 4 It is a front view schematic diagram of the high-power backup power supply for mining of the present invention.

[0049] In the figure: 1. Explosion-proof casing; 2. Touch screen; 3. Internal grounding device; 4. External grounding device; 10. Nameplate; 11. Warning sign; 12. EX sign; 13. MA sign; 14. Lithium iron phosphate battery; 15. Rectification control switch.

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In order to solve the technical problems that the existing underground power supply adopts cable laying, the distance is long, the power supply is multi-branched, and the underground electrical equipment is in charge of many departments, when the explosion-proof lighting switch is powered off, it causes important communication equipment to stop working, which has an adverse impact on coal mine safety production. Figure 1-Figure 4 , this embodiment provides the following technical solutions:

[0052] In this embodiment, for example, a certain underground mining area needs to provide a high-power backup power supply for important communication equipment such as the safety monitoring substation, 4G / 5G base station, and UWB precise personnel positioning substation in the coal mine, to ensure that when the explosion-proof lighting switch is out of power, the high-power backup power supply can also provide the miners with the necessary lighting and emergency call functions to ensure their safety in power outages or other emergencies, while avoiding important communication equipment from stopping working, to ensure a safe and reliable backup power supply for the mine in power outages or emergencies.

[0053] A method for preparing a high-power backup power supply for mining comprises the following steps:

[0054] Step 1, prepare the explosion-proof housing 1 required for the high-power backup power supply for mining, and install a touch screen 2 for controlling the high-power backup power supply for mining on one side of the explosion-proof housing 1; wherein, after the explosion-proof housing 1 required for the backup power supply is prepared, an internal grounding device 3 and an external grounding device 4 are arranged inside the explosion-proof housing 1; at the same time, after the explosion-proof housing 1 required for the backup power supply is prepared, a nameplate 10, a warning sign 11, an EX sign 12, an MA sign 13 and a rectifier control switch 15 are installed in sequence on the other side of the explosion-proof housing 1; in this embodiment: the explosion-proof housing 1 is composed of a shell, a main cavity door cover, a back cover plate, an intrinsically safe box cover plate, a bracket assembly welding, a box hinge and a door hinge, a bracket assembly welding is arranged at the bottom of the shell, the front of the shell is connected to the main cavity door cover through a door hinge, the remaining three sides of the shell are respectively connected to the back cover plate through box hinges, and the top of the shell is connected to the box The hinge is connected to the intrinsically safe box cover, thereby forming an integral explosion-proof casing 1 for protecting the internal components; secondly, the internal grounding device 3 and the external grounding device 4 are important devices for protecting power equipment and personal safety, and are composed of a grounding electrode, a grounding busbar, a grounding lead and a frame grounding, to achieve the purpose of connecting the high-power backup power supply to the earth. The metal object that is in direct contact with the earth to achieve electrical connection is the grounding electrode, which can be an artificial grounding electrode or a natural grounding electrode; its main function is to establish connectivity between the metal casing of the power equipment and the ground to reduce the voltage on the equipment casing and avoid electric shock accidents; the nameplate 10, warning sign 11, EX sign 12 and MA sign 13 are all used to indicate the various indicators of the high-power backup power supply, and the rectifier control switch 15 is used to manually adjust the operating status of the rectifier.

[0055] Step 2: Install the CKJ vacuum contactor, transformer, rectifier, inverter and BJ high-voltage DC relay in the explosion-proof casing 1 in sequence, and then install the battery module in the explosion-proof casing 1 through a fixing plate; wherein the battery module is composed of 34 60AH intrinsically safe lithium iron phosphate batteries 14 connected in series, and the battery module is also connected to a protection board, which is an important component of the BMS power management system and is responsible for managing the charging and discharging states of the battery module; following the above embodiment: the battery module is arranged in no less than two groups, each group having no less than six lithium iron phosphate batteries 14, and a fixing plate is arranged at the bottom end of each group of lithium iron phosphate batteries 14, and four spring washers are symmetrically arranged on the fixing plate, and each spring washer is fixed by a hexagonal bolt.

[0056] Step three, connect the input end of the CKJ vacuum contactor to the output end of the external AC power supply through a wire, connect the output end of the CKJ vacuum contactor to the input end of the transformer through a wire, and connect the output end of the transformer to the input end of the rectifier through a wire; wherein, after connecting the input end of the CKJ vacuum contactor to the output end of the external AC power supply, use the external AC power supply to input AC voltage to the CKJ vacuum contactor; after connecting the output end of the CKJ vacuum contactor to the input end of the transformer, the input AC voltage is controlled by the CKJ vacuum contactor, and after the CKJ vacuum contactor is closed, the AC voltage received by the CKJ vacuum contactor is transmitted to the transformer, and the transformer secondary output three-phase power supply voltage is used, and the three-phase power supply voltage output by the transformer secondary is supplied to the inverter module, the rectifier module and the charging module; secondly, the outer walls of the wires connecting the CKJ vacuum contactor, the transformer, the rectifier, the inverter and the BJ high-voltage DC relay are all covered with an insulating layer, the specification of the wire is 0.05mm, and the insulating layer is made of polyvinyl chloride material The material has an insulating layer thickness of 0.03 mm. Continuing with the above embodiment: the external 1140V or 660V AC is transmitted to the high-power backup power supply through a wire. After the external 1140V or 660V AC enters the high-power backup power supply, the CKJ vacuum contactor controls the disconnection or connection state of the external AC. After the CKJ vacuum contactor converts the 1140V or 660V AC into a connection state, it enters the input end of the rectifier in advance. The user can click on the corresponding rectifier module through the touch screen 2. The rectifier module controls the rectifier to convert AC power into DC power, and the DC power is supplied to the inverter module and the charging module after filtering. At the same time, the AC power can also directly enter the input end of the inverter module and the charging module from the three bypass wires A, B, and C, thus forming two power transmission paths; secondly, the inverter module, the rectifier module, and the charging module are respectively connected to the protection board and the battery module through the positive circuit wire, and the BJ high-voltage DC relay is connected to the positive circuit wire between the inverter module, the rectifier module, the charging module and the protection board and the battery module.

[0057] Step 4: electrically connect the CKJ vacuum contactor, transformer, rectifier, inverter, BJ high-voltage DC relay and battery module to the touch screen 2 in sequence through wires, and load the BMS power management system on the touch screen 2. The BMS power management system is equipped with an inverter module, a rectifier module, a charging module and an input / output control module. The above four modules are displayed on the touch screen 2, and the operating status of the above modules is controlled through the touch screen 2; wherein, the BMS power management system also needs to be equipped with an insulation monitoring module, which monitors the positive and negative currents transmitted between the rectifier, inverter, BJ high-voltage DC relay and battery module through the insulation monitoring module. The insulation of the pole circuit is monitored, and the insulation monitoring status is fed back to the touch screen 2; continuing from the above embodiment: such as: after the AC power enters the high-power backup power supply in step three, the distribution status of each wire and module is synchronously displayed on the touch screen 2, so that the user can more intuitively understand the distribution status of the BMS power management system; secondly, the BMS power management system is also used to monitor the status, charging and discharging process of the battery module, and provide necessary fault diagnosis and alarm functions; the BMS power management system ensures that the battery module is always in the best working condition, and provides timely alarms and feedback to ensure the reliability and stability of the power supply in the mine.

[0058] Step 5: Use the inverter module to control the inverter to output AC voltage to the external mine communication equipment, use the rectifier module to control the rectifier to convert the AC power transmitted by the transformer into DC power, and supply the DC power to the inverter and BJ high-voltage DC relay after filtering. Use the charging module to control the BJ high-voltage DC relay to charge the battery module, and the battery module uses the input and output control module to output the backup power supply to the external DC equipment, thereby forming a high-power backup power supply for mining; wherein, when the inverter module is used to control the inverter to output AC voltage to the external mine communication equipment, it is necessary to supply power to the battery module after the external AC power supply is powered off. In this case, the inverter is controlled by the inverter module to directly output the AC voltage to power the external mining communication equipment; the above embodiment is connected: such as: in step three, the external 1140V or 660V AC power enters the high-power backup power supply, and the CKJ vacuum contactor controls the state of the external AC power. At this time, the external AC power enters the rectifier in advance, and the user can click on the corresponding rectifier module through the touch screen 2. The rectifier module controls the rectifier to convert the 1140V or 660V AC power into DC120V DC power, and then outputs it as multi-channel DC power after filtering by the rectifier. The single-channel DC power is load measured to determine whether it is Check whether there is any leakage and whether the voltage exceeds the preset normal value range to prevent the occurrence of over-level tripping; then supply DC120V direct current to the inverter module and the charging module. When the DC voltage of the battery module itself reaches DC120V, the DC120V direct current is transmitted to the positive circuit through the charging module, and the DC120V direct current is transmitted to the input end of the battery module through the BJ high-voltage DC relay. The battery module provides backup power to external DC devices through the battery module input and output control module; at the same time, AC power can also directly enter the input of the inverter module and the charging module from the three bypass wires A, B, and C. At the input end, AC power is also transmitted at the inverter. Therefore, after the CKJ vacuum contactor is closed, the DC power is transmitted to the 4KVA transformer for power supply, and the three-phase 127V power supply voltage is output through the transformer secondary, and then the 127V power supply voltage is supplied to the inverter module and the charging module. When the external 1140V or 660V AC power is cut off, the inverter directly outputs 127V AC power to power the external mining communication equipment under the power supply of the battery module; thereby ensuring that the mining high-power backup power supply has two output modes, which improves the practicability of the mining high-power backup power supply, thereby avoiding the important communication equipment from stopping working.

[0059] The beneficial effects achieved by the above content: Through the above method, it is ensured that when the explosion-proof lighting switch is powered off, important communication equipment will not stop working, which will bring adverse effects on coal mine safety production, thereby ensuring the safety of miners and the continuity of mining production, and improving the continuity and reliability of mining communication equipment.

[0060] Working principle: By connecting the high-power backup power supply for mining to an external AC power supply and inputting the AC power supply voltage, the input power supply is controlled by the CKJ vacuum contactor. When the CKJ vacuum contactor is closed, the AC power supply supplies power to the 4KVA transformer, and the three-phase power supply voltage is output through the transformer secondary, and then the three-phase power supply voltage is transmitted to the rectifier module for processing. The AC power is converted into DC power by the rectifier, and output as multiple DC power after filtering. While supplying DC power to the inverter and BJ high-voltage DC relay, the load of the single DC power is measured to determine whether there is leakage and whether the voltage exceeds the preset normal value range to prevent the occurrence of over-level tripping; the charging module is selected through the touch screen 2 to control the BJ high-voltage DC relay to charge the battery module; the output of the high-power backup power supply for mining includes two parts: after the AC power is cut off, under the power supply of the battery module, the inverter directly outputs AC power to power the external mining communication equipment; the DC voltage of the battery module itself has reached DC120V, and the DC power of the battery module provides backup power to the external DC equipment through the input and output control module.

[0061] This embodiment also provides a method for preparing a high-power backup power supply for mining. The protection board is an important component of the BMS power management system, which is responsible for managing the charging and discharging states of the battery module, including:

[0062] Determine a multi-dimensional electrical property monitoring sensor device based on a monitoring mechanism of the battery module, and configure the multi-dimensional electrical property monitoring sensor device at a charging interface of the battery module;

[0063] Based on the configuration result, the interaction process between the battery module and the external AC power supply is monitored in real time, and when the real-time monitoring result shows that the value of the electrical parameter suddenly changes to zero, it is determined that the external AC power supply is powered off;

[0064] triggering a power supply mechanism of the battery module based on the determination result, and determining the remaining power of each battery cell in the battery module based on the triggering result, and at the same time, determining the minimum reserved power of each battery cell, and determining a constant discharge current value between each battery cell based on the remaining power and the minimum reserved power;

[0065] Determine the discharge temperature protection threshold and the charging temperature protection threshold of the battery module based on the protection mechanism of the battery module, perform the same-level trigger adaptation on the discharge temperature protection threshold and the minimum reserved power, and use the charging temperature protection threshold and the minimum reserved power as the first auxiliary limiting condition based on the adaptation result. At the same time, encapsulate the first auxiliary limiting condition and the constant discharge current value into a battery discharge management mechanism, and control the battery module to output backup power to the external DC device based on the battery discharge management mechanism;

[0066] Monitor the process of the battery module outputting backup power to the external DC device in real time, and interrupt the power supply process of the battery module when the first auxiliary limiting condition is met;

[0067] Determine the power supply recovery state of the external AC power supply based on the interruption result, and determine the maximum charging voltage of each battery cell in the battery module after the power supply is restored;

[0068] Determine a constant charging current value for each battery cell in the battery module based on the maximum charging voltage, and encapsulate the charging temperature protection threshold as a second auxiliary limiting condition and the constant charging current value into a battery charging management mechanism;

[0069] Based on the battery charging management mechanism, balanced charging management is performed on each battery cell in the battery module.

[0070] In this embodiment, the monitoring mechanism is set in advance and is used to characterize the monitoring requirements for the battery module.

[0071] In this embodiment, the multi-dimensional electrical property monitoring sensor device refers to a device for monitoring whether the battery module is currently being charged, and may be a sensor for monitoring voltage and current.

[0072] In this embodiment, configuring the multi-dimensional electrical property monitoring sensor device at the charging interface of the battery module means docking the multi-dimensional electrical property monitoring sensor device with the battery module at the interface to achieve the purpose of monitoring.

[0073] In this embodiment, the sudden change of the value of the electrical parameter to zero means that the charging voltage or charging current of the battery module becomes 0. When it becomes 0, it is determined that charging is interrupted.

[0074] In this embodiment, triggering the battery module power supply mechanism based on the determination result refers to triggering the battery module to supply power to the external device.

[0075] In this embodiment, the minimum reserved power refers to the power that each battery cell needs to retain by itself, so as to ensure that the battery life or usage status is not affected.

[0076] In this embodiment, the protection mechanism is set in advance.

[0077] In this embodiment, the discharge temperature protection threshold is set in advance and is used to represent the maximum temperature that the battery module is allowed to reach during discharge. If the temperature exceeds this level, the power supply will be stopped.

[0078] In this embodiment, the charging temperature protection threshold is set in advance and is used to represent the maximum temperature allowed for the battery module during charging. If the temperature exceeds this value, charging will be stopped.

[0079] In this embodiment, the same-level trigger adaptation of the discharge temperature protection threshold and the minimum reserved power means that when one of the discharge temperature protection threshold and the minimum reserved power reaches a condition, the discharge process of the battery module is terminated.

[0080] In this embodiment, the first auxiliary limiting condition is used to protect the discharge process of the battery module.

[0081] In this embodiment, determining the power supply recovery state of the external AC power source based on the interruption result refers to monitoring the power supply status of the external AC power source to the battery module.

[0082] In this embodiment, the second auxiliary limiting condition is used to protect the charging process of the battery module.

[0083] The working principle and beneficial effects of the above technical solution are: by determining the multi-dimensional electrical monitoring sensor equipment for the battery module, and configuring the multi-dimensional electrical monitoring sensor equipment at the charging interface of the battery module, the charging status of the battery module of the external AC power supply can be effectively monitored in real time. Secondly, when the external AC power supply is interrupted, the battery module is triggered in time to power the mining equipment, so as to ensure the stable operation of the mining equipment. At the same time, when the battery module is supplying power, the constant discharge current value of the battery module is determined to ensure the balanced discharge of each battery cell in the battery module, and protect the battery module from damage. The battery discharge management mechanism is configured for the discharge process to timely interrupt the discharge process of the battery module when there is danger or abnormality. Finally, the power supply recovery status of the external AC power supply is monitored in real time, and the battery module is effectively charged in time after the power supply is restored, and the constant charging current value is determined during charging. At the same time, the battery charging management mechanism is configured for the charging process to realize real-time and effective monitoring and management of the charging process of the battery module, which ensures the charging and discharging reliability of the battery module and provides reliable power supply guarantee for mining equipment.

[0084] This embodiment also provides a method for preparing a high-power backup power supply for mining, which controls the inverter to directly output AC voltage to power external mining communication equipment through an inverter module, including:

[0085] Obtain the power supply time of the battery module to the external mine communication equipment and the total load power of the external mine communication equipment, and calculate the power supply of the battery module based on the power supply time and the total load power;

[0086] The battery module is charged based on the power supply result based on the external AC power supply, and the charging efficiency of the battery module is calculated based on the power supply. The specific steps include:

[0087] Calculate the power supply of the battery module according to the following formula:

[0088]

[0089] Among them, M represents the power supply of the battery module; P represents the total load power value of the external mining communication equipment; U represents the power supply voltage value of the battery module; t represents the power supply time of the battery module to the external mining communication equipment;

[0090] The charging efficiency of the battery module is calculated according to the following formula:

[0091]

[0092] Among them, μ represents the charging efficiency of the battery module, and its value range is (0, 1); α represents the battery capacity value of the battery module after charging; M represents the power supply of the battery module; β represents the remaining power value of the battery module after the power supply ends; V represents the charging rate of the battery module; T represents the actual charging time of the battery module; τ represents the error coefficient, and its value range is (0.01, 0.015); e represents the natural constant, and its value is 2.17;

[0093] comparing the calculated charging efficiency with a preset threshold;

[0094] If the calculated charging efficiency is greater than a preset threshold, it is determined that the charging state management of the battery module is qualified;

[0095] Otherwise, it is determined that the charging state management of the battery module is unqualified, and the charging optimization direction and optimization parameters of the battery module are determined based on the calculation results;

[0096] The charging strategy of the battery module is optimized based on the charging optimization direction and optimization parameters.

[0097] In this embodiment, the total load power refers to the sum of the powers of the external mine communication equipment.

[0098] In this embodiment, the preset threshold is set in advance and is used to measure whether the charging efficiency of the battery module meets the minimum requirement, and is adjustable.

[0099] In this embodiment, the charging optimization direction and optimization parameters refer to the steps for optimizing the charging process of the battery module and the parameter values ​​that need to be specifically optimized in this step.

[0100] The working principle and beneficial effects of the above technical solution are: by calculating the power supply of the battery module and calculating the charging efficiency of the battery module based on the calculated power supply, it is convenient to effectively evaluate the charging process of the battery module, and when the charging efficiency does not meet the requirements of the preset threshold, it is possible to accurately and effectively confirm the optimization direction and optimization parameters according to the calculation results, and realize accurate and reliable optimization of the charging strategy of the battery module, thereby ensuring the reliability of the battery module as a backup power supply for mining equipment.

[0101] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0102] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a high-power backup power supply for mining, comprising the following steps: Step 1: prepare an explosion-proof housing (1) required for a high-power backup power supply for mining, and install a touch screen (2) for controlling the high-power backup power supply for mining on one side of the explosion-proof housing (1); Step 2: Install the CKJ vacuum contactor, transformer, rectifier, inverter and BJ high-voltage DC relay in the explosion-proof housing (1) in sequence, and then install the battery module in the explosion-proof housing (1) through a fixing plate; Step 3: Connect the input end of the CKJ vacuum contactor to the output end of the external AC power supply through a wire, connect the output end of the CKJ vacuum contactor to the input end of the transformer through a wire, and connect the output end of the transformer to the input end of the rectifier through a wire; Step 4: electrically connect the CKJ vacuum contactor, transformer, rectifier, inverter, BJ high-voltage DC relay and battery module to the touch screen (2) in sequence through wires, and load a BMS power management system on the touch screen (2), wherein the BMS power management system is provided with an inverter module, a rectifier module, a charging module and an input / output control module, and the inverter module, the rectifier module, the charging module and the input / output control module are displayed on the touch screen (2), and the operating status of the above modules is controlled through the touch screen (2); Step 5: The inverter is controlled by the inverter module to output AC voltage to the external mine communication equipment, and the rectifier module is used to control the rectifier to convert the AC power transmitted by the transformer into DC power. After filtering, the DC power is supplied to the inverter and the BJ high-voltage DC relay, and the charging module is used to control the BJ high-voltage DC relay to charge the battery module. The battery module uses the input and output control module to output the backup power supply to the external DC equipment, thereby forming a high-power backup power supply for mining; When the inverter is controlled by the inverter module to output AC voltage to the external mining communication equipment, the external AC power supply must be cut off and the battery module must be used to supply power. Then, the inverter is controlled by the inverter module to directly output AC voltage to power the external mining communication equipment. The inverter module controls the inverter to directly output AC voltage to power external mining communication equipment, including: Obtain the power supply time of the battery module to the external mine communication equipment and the total load power of the external mine communication equipment, and calculate the power supply of the battery module based on the power supply time and the total load power; The battery module is charged based on the power supply result based on the external AC power supply, and the charging efficiency of the battery module is calculated based on the power supply. The specific steps include: Calculate the power supply of the battery module according to the following formula: Among them, M represents the power supply of the battery module; P represents the total load power value of the external mining communication equipment; U represents the power supply voltage value of the battery module; t represents the power supply time of the battery module to the external mining communication equipment; The charging efficiency of the battery module is calculated according to the following formula: Among them, μ represents the charging efficiency of the battery module, and its value range is (0, 1); α represents the battery capacity value of the battery module after charging; M represents the power supply of the battery module; β represents the remaining power value of the battery module after the power supply ends; V represents the charging rate of the battery module; T represents the actual charging time of the battery module; τ represents the error coefficient, and its value range is (0.01, 0.015); e represents the natural constant, and its value is 2.17; comparing the calculated charging efficiency with a preset threshold; If the calculated charging efficiency is greater than a preset threshold, it is determined that the charging state management of the battery module is qualified; Otherwise, it is determined that the charging state management of the battery module is unqualified, and the charging optimization direction and optimization parameters of the battery module are determined based on the calculation results; The charging strategy of the battery module is optimized based on the charging optimization direction and optimization parameters.

2. The method for preparing a high-power backup power supply for mining according to claim 1, characterized in that: In step 2, the battery module is composed of 34 60AH lithium iron phosphate batteries (14) connected in series, and the battery module is also connected to a protection board, which is an important component of the BMS power management system and is responsible for managing the charging and discharging states of the battery module.

3. The method for preparing a high-power backup power supply for mining according to claim 2, characterized in that: The protection board is an important part of the BMS power management system, which is responsible for managing the charging and discharging status of the battery module, including: Determine a multi-dimensional electrical property monitoring sensor device based on a monitoring mechanism of the battery module, and configure the multi-dimensional electrical property monitoring sensor device at a charging interface of the battery module; Based on the configuration result, the interaction process between the battery module and the external AC power supply is monitored in real time, and when the real-time monitoring result shows that the value of the electrical parameter suddenly changes to zero, it is determined that the external AC power supply is powered off; triggering a power supply mechanism of the battery module based on the determination result, and determining the remaining power of each battery cell in the battery module based on the triggering result, and at the same time, determining the minimum reserved power of each battery cell, and determining a constant discharge current value between each battery cell based on the remaining power and the minimum reserved power; Determine the discharge temperature protection threshold and the charging temperature protection threshold of the battery module based on the protection mechanism of the battery module, perform the same-level trigger adaptation on the discharge temperature protection threshold and the minimum reserved power, and use the charging temperature protection threshold and the minimum reserved power as the first auxiliary limiting condition based on the adaptation result. At the same time, encapsulate the first auxiliary limiting condition and the constant discharge current value into a battery discharge management mechanism, and control the battery module to output backup power to the external DC device based on the battery discharge management mechanism; Monitor the process of the battery module outputting backup power to the external DC device in real time, and interrupt the power supply process of the battery module when the first auxiliary limiting condition is met; Determine the power supply recovery state of the external AC power supply based on the interruption result, and determine the maximum charging voltage of each battery cell in the battery module after the power supply is restored; Determine a constant charging current value for each battery cell in the battery module based on the maximum charging voltage, and encapsulate the charging temperature protection threshold as a second auxiliary limiting condition and the constant charging current value into a battery charging management mechanism; Based on the battery charging management mechanism, balanced charging management is performed on each battery cell in the battery module.

4. The method for preparing a high-power backup power supply for mining according to claim 1, characterized in that: After the input end of the CKJ vacuum contactor is connected to the output end of the external AC power supply in the step 3, an AC voltage is input to the CKJ vacuum contactor using the external AC power supply; After the output end of the CKJ vacuum contactor is connected to the input end of the transformer, the input AC voltage is controlled by the CKJ vacuum contactor. After the CKJ vacuum contactor is closed, the AC voltage received by the CKJ vacuum contactor is transmitted to the transformer, and the three-phase power supply voltage is output by the transformer secondary. The three-phase power supply voltage output by the transformer secondary is used to supply power to the inverter module, the rectifier module and the charging module.

5. The method for preparing a high-power backup power supply for mining according to claim 1, characterized in that: In the step 4, an insulation monitoring module is also required to be arranged in the BMS power management system, and the insulation monitoring module is used to monitor the insulation of the positive and negative circuits transmitted between the rectifier, the inverter, the BJ high-voltage DC relay and the battery module, and the insulation monitoring status is fed back to the touch screen (2).

6. The method for preparing a high-power backup power supply for mining according to claim 1, characterized in that: In the step three, the outer walls of the wires connecting the CKJ vacuum contactor, transformer, rectifier, inverter and BJ high-voltage DC relay are all covered with an insulating layer, the specification of the wire is 0.05mm, the insulating layer is made of polyvinyl chloride material, and the thickness of the insulating layer is 0.03mm.

7. The method for preparing a high-power backup power supply for mining according to claim 1, characterized in that: In the step 1, after the explosion-proof housing (1) required for the backup power supply is prepared, an internal grounding device (3) and an external grounding device (4) are arranged inside the explosion-proof housing (1).

8. The method for preparing a high-power backup power supply for mining according to claim 7, characterized in that: In the step 1, after preparing the explosion-proof housing (1) required for the backup power supply, a nameplate (10), a warning sign (11), an EX sign (12), an MA sign (13) and a rectifier control switch (15) need to be installed in sequence on the other side of the explosion-proof housing (1).

Images