Method for applying a super-capacity battery to an RTG, control circuit and storage medium

Abstract

The application relates to an application method, a control circuit and a storage medium of a super-large capacity battery in an RTG, and comprises the following steps: when the RTG is powered by a direct current slide wire, a power supply working mode is set, a controller activates a battery BMU to read battery data; if a battery pack pressure difference is less than 10, three groups of batteries are simultaneously closed to charge; if the battery pack pressure difference is greater than or equal to 10, the controller calculates the value of V mid -V min ; when SOC=100, if V Dlta_Cell is greater than or equal to 100, the controller controls V Cell_Min to be in a battery pack closing state, and the battery group is charged alone; when the RTG needs to be transferred, a driver presses an RTG power supply mode control button to a battery mode, and the controller automatically switches to a battery working mode; when the RTG is powered by the battery, the battery working mode is set, the controller activates the battery BMU to read the battery data; when the battery pack pressure difference is greater than or equal to 10, the controller sends a switching prohibition signal; and when the battery pack pressure difference is less than 10, the controller controls the three groups of batteries to be closed, and the RTG works in the battery mode to provide power for the RTG.

Description

Technical Field

[0001] This invention relates to the field of power distribution technology, and more specifically, to a power distribution control method and control circuit. Background Technology

[0002] RTG (Roller-Track Gantry Crane) is widely used for handling and stacking large equipment and goods. In operation, the load is loaded onto a trolley, which is then driven to move horizontally along the main beam of the crane to achieve the desired transport.

[0003] Currently, RTGs consume a lot of electricity when used in ports, and also cause some pollution to the port environment.

[0004] Currently, the country is promoting green ports, requiring zero emissions for terminal equipment. Moreover, there is a significant price difference in electricity during the day and night at the terminal. Against this backdrop, there is an urgent need for a method to apply ultra-large capacity batteries in RTGs that can achieve zero emissions, reduce the intensity of sliding line use, reduce DC sliding line wear, lower operating costs, reduce the burden on personnel during site relocation, and improve operational efficiency.

[0005] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0006] The purpose of this invention is to provide a method, control circuit, and storage medium for the application of ultra-large capacity batteries in RTGs. This method for the application of ultra-large capacity batteries in RTGs achieves zero emissions, reduces the intensity of slide wire use, reduces DC slide wire wear, lowers operating costs, reduces the burden on personnel during site transfers, and improves operating efficiency.

[0007] This invention provides a method for applying ultra-high capacity batteries in RTGs, comprising the following steps:

[0008] S1: When the RTG is powered by a DC sliding contact, the AC operating mode is set, and the controller will activate the battery BMU to read battery data and the DC-DC bus voltage setpoint V. S =V D -20;

[0009] S2: If the battery pack voltage difference V DeltaBatt If the value is less than 10, then all three battery groups will be charged simultaneously, with a charging current I. B ≤I C Until SOC = 100 or V max =V B ;

[0010] S3: If the battery pack voltage difference V DeltaBatt If the value is ≥10, then the controller calculates V. mid –V min The value of V, if mid –Vmin If the value is ≥10, then the controller will give V min The battery pack sends a closing command to V. min Battery pack charging, charging current I B ≤I C until V mid –V min If ≤5, then the controller supplies V mid The battery pack sends a closing command and simultaneously sends a signal to V. mid and V min Charge until V DeltaBatt ≤5, V max The battery combination switch charges three groups of batteries simultaneously, with a charging current I. B ≤I C Until SOC = 100 or V max =V B ;

[0011] S4: When SOC = 100, if V Dlta_Cell If ≥100, the controller controls V. Cell_Min The battery pack circuit breaker charges the battery pack separately, with a charging current I. B ≤I C This triggers battery balancing mode until V. Dlta_Cell ≤30, if V during the equilibrium process Cell_Min The battery pack changes, and the minimum cell voltage of the battery being charged is greater than or equal to V. Cell_Min When +10, switch to the new V. Cell_Min Charging V max =V B ;

[0012] S5: When the RTG needs to be moved between locations, the driver switches the RTG power supply mode control button to battery mode. The controller will automatically switch to battery operation mode and set the DC-DC voltage to V. S =V D If V at this time DeltaBatt If the value is ≥10, then the controller controls V. max The battery combination switch provides power to the RTG for transfer, V DeltaBatt If the number of batteries is less than 10, the three sets of batteries will be switched on to provide power for the RTG to transfer to the site. When the RTG is in place, the driver will switch the RTG power supply mode control button to the mains power mode, and the controller will automatically switch to the mains power working mode to continue charging the battery or balancing the battery voltage difference.

[0013] S6: When the RTG is powered by battery, the battery operating mode is set, and the controller will activate the battery BMU to read battery data and the DC-DC bus voltage setpoint V. S =V D ;

[0014] S7: When the battery pack voltage difference V DeltaBatt If the value is ≥10, the controller will issue a switch-prohibited signal, indicating that the battery needs to be charged to balance the voltage difference.

[0015] S8: When the battery pack pressure difference V DeltaBatt If the value is ≤10, the controller will control the three battery banks to operate the RTG in battery mode, providing power to the RTG. When the RTG is running, the DC-DC converter will set the discharge current I. B =I P After 30 seconds, set the discharge current to I. B =I C When the battery charge SOC ≤ 35%, the controller sends a low battery signal to prompt the driver to switch to AC power mode. The controller then controls the battery to switch to AC power mode for operation while charging the battery.

[0016] Furthermore, the V S This indicates the DC-DC bus voltage setting value, the V D This represents the actual value of the bus voltage, V. B This indicates the battery's rated voltage, and SOC indicates the battery's capacity (V). max This indicates the maximum battery voltage, V. mid This indicates the battery's intermediate voltage, V. min This indicates the maximum battery voltage, V. Cell_Min This indicates the minimum cell voltage of the battery, V. Cell_Max I represents the maximum cell voltage of the battery. B Indicates the set charging current, I C Indicates the battery's allowable charging current, I P This indicates the battery's allowable pulse charging current, V. DeltaBatt V represents the maximum voltage difference of the battery pack. Dlta_Cell This indicates the maximum cell voltage difference of the battery.

[0017] The present invention also provides a control circuit for use in the above-mentioned application method of ultra-large capacity batteries in RTG.

[0018] Furthermore, the control circuit includes a battery DC power supply, a battery high-voltage control box, a DC-DC inverter, and an RTG DC bus; the battery DC power supply is connected to the battery high-voltage control box and the DC-DC inverter, and the DC-DC inverter is connected to the RTG DC bus.

[0019] Furthermore, both the battery DC power supply and the battery high-voltage control box have three sets.

[0020] The present invention also provides a storage medium including a computer program, which, when executed, performs the above-described method for applying ultra-high capacity batteries in RTG.

[0021] The present invention provides a method for applying ultra-large capacity batteries in RTGs (Remotely Used Geological Utilization Units). The RTG is equipped with a large-capacity battery pack and a DC sliding contact line power trolley. During nighttime when electricity prices are low, the sliding contact line is used for operation while simultaneously charging the lithium battery pack. When relocation is required, the system switches to lithium battery power, ensuring uninterrupted operation and seamless switching. During the daytime when electricity prices are high, the lithium battery pack powers the operation, meeting the requirement for 10 hours of full-load, full-power operation. This method solves the problems of needing to shut down the unit during relocation, requiring auxiliary personnel to start the diesel generator, resulting in pollutant emissions, insufficient sliding contact line capacity for mains power operation, and high daytime electricity prices. It achieves zero emissions, reduces the intensity of sliding contact line use, reduces DC sliding contact line wear, lowers operating costs, reduces the burden on relocation personnel, and improves operational efficiency. Attached Figure Description

[0022] Figure 1 A schematic diagram of the control circuit provided in an embodiment of the present invention.

[0023] Figure 2 This is a flowchart illustrating the application method of ultra-large capacity batteries in RTG provided in an embodiment of the present invention.

[0024] The reference numerals and components involved in the accompanying drawings are shown below:

[0025] 100. Battery DC power supply

[0026] 200. Battery high voltage control box

[0027] 300, DC-DC frequency converter

[0028] 400, RTG DC busbar

[0029] 500, Controller

[0030] 600, DC slide wire Detailed Implementation

[0031] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0032] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] Example 1

[0034] Figure 1 This is a schematic diagram of the control circuit provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the process modules for applying an ultra-large capacity battery in an RTG according to an embodiment of the present invention. Please refer to... Figure 1 , Figure 2 The method for applying ultra-large capacity batteries in RTGs provided in this embodiment of the invention includes the following steps:

[0035] S1: When the RTG is powered by a DC sliding contact, the AC operating mode is set, and the controller 500 will activate the battery BMU to read battery data and the DC-DC bus voltage setpoint V. S =V D -20;

[0036] S2: If the battery pack voltage difference V DeltaBatt If the value is less than 10, then all three battery groups will be charged simultaneously, with a charging current I. B ≤I C Until SOC = 100 or V max =V B ;

[0037] S3: If the battery pack voltage difference V DeltaBatt If ≥10, then the controller 500 calculates V. mid –V min The value of V, if mid –V min ≥10, then controller 500 supplies V min The battery pack sends a closing command to V. min Battery pack charging, charging current I B ≤I C until V mid –V min If ≤5, then controller 500 supplies V mid The battery pack sends a closing command and simultaneously sends a signal to V. mid and V min Charge until V DeltaBatt ≤5, V max The battery combination switch charges three groups of batteries simultaneously, with a charging current I. B ≤I C Until SOC = 100 or V max =V B ;

[0038] S4: When SOC = 100, if V Dlta_Cell If ≥100, the controller 500 controls V. Cell_Min The battery pack circuit breaker charges the battery pack separately, with a charging current I. B ≤I C This triggers battery balancing mode until V. Dlta_Cell ≤30, if V during the equilibrium process Cell_Min The battery pack changes, and the minimum cell voltage of the battery being charged is greater than or equal to V. Cell_Min When +10, switch to the new V. Cell_Min Charging Vmax =V B ;

[0039] S5: When the RTG needs to be moved, the driver switches the RTG power supply mode control button to battery mode. The controller 500 will automatically switch to battery operation mode and set the DC-DC voltage to V. S =V D If V at this time DeltaBatt If the value is ≥10, then controller 500 controls V. max The battery combination switch provides power to the RTG for transfer, V DeltaBatt If the number of batteries is less than 10, the three sets of batteries will be switched on to provide power for the RTG to provide power for the transfer. When the RTG is in place, the driver will switch the RTG power supply mode control button to the mains power mode, and the controller 500 will automatically switch to the mains power working mode to continue charging the battery or balancing the battery voltage difference.

[0040] S6: When the RTG is powered by battery, the battery operating mode is set, and the controller 500 will activate the battery BMU to read battery data and the DC-DC bus voltage setpoint V. S =V D ;

[0041] S7: When the battery pack voltage difference V DeltaBatt If the value is ≥10, the controller 500 will send a switch-prohibited signal, indicating that the battery needs to be charged to balance the voltage difference.

[0042] S8: When the battery pack pressure difference V DeltaBatt If the value is ≤10, then the controller 500 controls the three battery banks to operate the RTG in battery mode, providing power to the RTG. When the RTG is running, the DC-DC converter sets the discharge current I. B =I P After 30 seconds, set the discharge current to I. B =I C When the battery charge SOC ≤ 35%, the controller 500 sends a low battery signal to prompt the driver to switch to AC power mode. The controller 500 then controls the battery to switch to AC power mode for operation while charging the battery.

[0043] Specifically, the V S This indicates the DC-DC bus voltage setting value, the V D This represents the actual value of the bus voltage, V. B This indicates the battery's rated voltage, and SOC indicates the battery's capacity (V). max This indicates the maximum battery voltage, V. mid This indicates the battery's intermediate voltage, V. min This indicates the maximum battery voltage, V. Cell_Min This indicates the minimum cell voltage of the battery, V. Cell_Max I represents the maximum cell voltage of the battery.B Indicates the set charging current, I C Indicates the battery's allowable charging current, I P This indicates the battery's allowable pulse charging current, V. DeltaBatt V represents the maximum voltage difference of the battery pack. Dlta_Cell This indicates the maximum cell voltage difference of the battery.

[0044] It should be noted that this invention uses a high-capacity lithium iron phosphate battery to power the terminal RTG, and the port power supply method used is DC sliding contact line power supply. When transferring to another location, the diesel generator is started to supply power. A high-capacity battery pack and a DC sliding contact line power trolley are installed on the RTG (tire-mounted gantry crane). When the electricity price is low at night, the sliding contact line is used for operation, while the lithium battery pack is charged. When transfer is required, the power supply is switched to the lithium battery pack to meet the requirements of uninterrupted operation and seamless switching. During the day when the electricity price is high, the lithium battery pack is used for operation to meet the requirements of 10 hours of full-load full-power operation.

[0045] The method for applying ultra-large capacity batteries in RTGs according to the present invention solves the problems of needing to shut down the machine during relocation, requiring auxiliary personnel to start the diesel generator set, polluting gas emissions, insufficient capacity of the mains power supply line, and high daytime electricity prices; thereby achieving zero emissions, reducing the intensity of line use, reducing DC line wear, reducing operating costs, reducing the burden on relocation personnel, and improving operating efficiency.

[0046] Further reference Figure 1 , Figure 2 The present invention also provides a control circuit for use in the above-mentioned application method of ultra-large capacity batteries in RTG.

[0047] The control circuit of this invention includes a battery DC power supply 100, a battery high-voltage control box 200, a DC-DC inverter 300, and an RTG DC bus 400. The battery DC power supply 100 is connected to the DC-DC inverter 300 through the battery high-voltage control box 200, and the DC-DC inverter 300 is connected to the RTG DC bus 400. Further, there are three sets of battery DC power supplies 100 and three sets of battery high-voltage control boxes 200.

[0048] It should be noted that the three sets of battery DC power supplies 100 are connected to the DC-DC inverter 300 via three battery high-voltage control boxes 200, and then to the DC sliding line 600. The controller 500 controls the charging and discharging of the batteries and the power distribution based on the status of the DC sliding line 600. When the DC sliding line 600 is engaged, the battery is in a charging state, and the charging power is controlled by the load of the DC sliding line 600. When the DC sliding line 600 is disengaged, the battery is in an automatic charging and discharging switching mode. In this mode, it can provide high-power energy for the RTG lifting and moving of the trolley, while absorbing the potential energy and kinetic energy feedback from the lifting, lowering and braking of the trolley. Furthermore, the battery is protected by reading the battery status during each process.

[0049] The present invention also provides a storage medium including a computer program, which, when executed, performs the above-described method for applying ultra-high capacity batteries in RTG.

[0050] As can be seen from the above description, the advantages of this invention are:

[0051] 1. The method for applying ultra-large capacity batteries in RTG provided by this invention involves assembling a large capacity battery pack and a DC sliding contact line power trolley on the RTG. When the electricity price is low at night, the sliding contact line is used for operation while charging the lithium battery pack. When a relocation is required, the system switches to lithium battery pack power supply to meet the requirements of uninterrupted operation and seamless switching. During the day, when the electricity price is high, the lithium battery pack is used for operation to meet the requirements of 10 hours of full-load full-power operation.

[0052] 2. The method for applying ultra-large capacity batteries in RTG provided by this invention solves the problems of needing to shut down the generator during relocation, requiring auxiliary personnel to start the diesel generator unit, pollutant gas emissions, insufficient capacity of the mains power supply line, and high daytime electricity prices.

[0053] 3. The method for applying ultra-large capacity batteries in RTG provided by this invention achieves zero emissions, reduces the intensity of slide wire use, reduces DC slide wire wear, reduces operating costs, reduces the burden on personnel during site transfer, and improves operating efficiency.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for applying ultra-high capacity batteries in RTGs, characterized in that, Includes the following steps: S1: When the RTG is powered by DC sliding wire, the mains operating mode is set, and the controller will activate the battery BMU to read battery data. The DC-DC bus voltage setting value VS = VD-20; S2: If the battery pack voltage difference VDeltaBatt < 10, then all three battery packs will be charged simultaneously with the charging current IB ≤ IC, until SOC = 100 or Vmax = VB. S3: If the battery pack differential voltage VDeltaBatt ≥ 10, the controller calculates the value of Vmid – Vmin. If Vmid – Vmin ≥ 10, the controller sends a closing command to the Vmin battery pack to charge the Vmin battery pack, with a charging current IB ≤ IC, until Vmid – Vmin ≤ 5. Then, the controller sends a closing command to the Vmid battery pack to charge both Vmid and Vmin simultaneously, until VDeltaBatt ≤ 5. The Vmax battery pack is then closed to charge all three battery packs simultaneously, with a charging current IB ≤ IC, until SOC = 100 or Vmax = VB. S4: When SOC = 100, if VDlta_Cell ≥ 100, the controller controls the gate of the battery group where VCell_Min is located to charge the battery group separately, with charging current IB ≤ IC, triggering the battery balancing mode until VDlta_Cell ≤ 30. If the battery group where VCell_Min is located changes during the balancing process, when the minimum cell voltage of the battery being charged is greater than or equal to VCell_Min + 10, the system switches to the new VCell_Min for charging, Vmax = VB. S5: When the RTG needs to be moved, the driver switches the RTG power supply mode control button to battery mode. The controller will automatically switch to battery working mode and set the DC-DC voltage to VS = VD. If VDeltaBatt ≥ 10 at this time, the controller controls the battery combination switch where Vmax is located to provide power to the RTG for the transfer. If VDeltaBatt < 10, the three battery groups will be switched together to provide power to the RTG for the transfer. After the RTG is moved to the destination, the driver switches the RTG power supply mode control button to AC mode. The controller will automatically switch to AC working mode to continue charging the battery or balancing the battery voltage difference. S6: When the RTG is powered by battery, the battery operating mode is set, and the controller will activate the battery BMU to read battery data. The DC-DC bus voltage setting value VS = VD. S7: When the battery pack differential voltage VDeltaBatt ≥ 10, the controller will issue a switch-off prohibition signal, indicating that charging is required to balance the battery differential voltage. S8: When the battery pack differential voltage VDeltaBatt ≤ 10, the controller controls the three battery packs to close and the RTG operates in battery mode to provide power to the RTG. When the RTG is running, the DC-DC converter sets the discharge current IB = IP, and after 30 seconds, it sets the discharge current to IB = IC. When the battery charge SOC ≤ 35, the controller sends a low battery signal to prompt the driver to switch to AC power mode. The controller then controls the battery to switch to AC power mode for operation while charging the battery. VS represents the DC-DC bus voltage setting value, VD represents the actual bus voltage value, VB represents the battery rated voltage, SOC represents the battery capacity, Vmax represents the battery maximum voltage, Vmid represents the battery intermediate voltage, Vmin represents the battery minimum voltage, VCell_Min represents the battery minimum cell voltage, VCell_Max represents the battery maximum cell voltage, IB represents the set charging current, IC represents the battery allowable charging current, IP represents the battery allowable pulse charging current, VDeltaBatt represents the battery pack maximum voltage difference, and VDlta_Cell represents the battery maximum cell voltage difference.

2. A control circuit, characterized in that, The method of applying the ultra-large capacity battery described in claim 1 to RTG.

3. The control circuit according to claim 2, characterized in that, The control circuit includes a battery DC power supply (100), a battery high voltage control box (200), a DC-DC inverter (300), and an RTG DC busbar (400). The battery DC power supply (100) is connected to the battery high voltage control box (200) and the DC-DC inverter (300), and the DC-DC inverter (300) is connected to the RTG DC bus (400).

4. The control circuit according to claim 3, characterized in that, Both the battery DC power supply (100) and the battery high voltage control box (200) are three sets.

5. A storage medium, characterized in that, It includes a computer program, which, when executed, performs the method for applying the ultra-large capacity battery in RTG as described in claim 1.

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