An emergency power supply device of a temperature wide-range magnetic suction type new energy gantry crane

Abstract

The utility model discloses a temperature wide range magnetic attraction formula new energy gantry crane's emergency power supply device, including main power module, lithium iron phosphate battery group, high voltage distribution box, zero time delay switching control cabinet, solid state relay and voltage sampling chip, main power module access 380V industrial power network, and output end is connected high voltage distribution box and zero time delay switching control cabinet respectively, lithium iron phosphate battery group adopts 1P72S framework, and connects high voltage distribution box, zero time delay switching control cabinet integrated two -way DCAC inverter, and solid state relay and voltage sampling chip are integrated in it and realize quick switching. The device solves the problem of insufficient capacity of existing UPS, long switching delay, ensures that the electromagnetic chuck does not lose magnetism when power off, and is suitable for wide temperature industrial scene.

Description

Technical Field

[0001] This utility model relates to the field of safe power supply technology for industrial lifting equipment, specifically to an emergency power supply device for a temperature-wide magnetic suction type new energy gantry crane. Background Technology

[0002] Traditional magnetic gantry cranes are widely used in industrial production for lifting large steel materials such as steel plates and coils. Their core function relies on the magnetic attraction of the load using an electromagnetic chuck, but the maintenance of this magnetic force depends entirely on the mains power supply. When a sudden power outage occurs, the electromagnetic chuck instantly loses its magnetism, causing the load to lose its attraction and fall, potentially leading to serious production accidents such as equipment damage and personal injury. To address this issue, existing technologies often use UPS systems as emergency power sources, but these systems have significant drawbacks: UPS systems generally use lead-acid batteries with a discharge rate typically ≤0.5C, which cannot meet the large current required by the electromagnetic chuck during a power outage, resulting in insufficient magnetic force maintenance; furthermore, UPS systems use mechanical contactors for power switching, with a switching time >200ms, during which time the load has already begun to slip, rendering them ineffective in providing protection; additionally, existing systems lack dynamic battery charging and discharging balancing management, which can lead to over-discharge of individual cells with long-term use, shortening battery life, and significantly degrading battery performance in low-temperature environments, making them unsuitable for wide-temperature conditions such as northern winters.

[0003] Therefore, there is an urgent need for an emergency power supply device that can meet instantaneous high current requirements, achieve rapid power switching, and adapt to a wide temperature range, in order to solve the safety hazards and adaptability problems of existing technologies. Utility Model Content

[0004] To address the problems existing in current technologies, this utility model provides an emergency power supply device for a wide-temperature-range magnetic suction new energy gantry crane, comprising a main power module, a lithium iron phosphate battery pack, a high-voltage distribution box, a zero-delay switching control cabinet, a solid-state relay, and a voltage sampling chip. The main power module is connected to a 380V industrial power grid, and its output terminals are electrically connected to the input terminals of the high-voltage distribution box and the zero-delay switching control cabinet, respectively, for directly supplying power to the load and charging the battery pack. The lithium iron phosphate battery pack adopts a 1P72S architecture, with its positive and negative terminals corresponding to those of the high-voltage distribution box. The high-voltage distribution box has a built-in charging and discharging anti-reverse current control circuit and protection devices. The zero-delay switching control cabinet integrates a bidirectional DC / AC inverter. The solid-state relay and voltage sampling chip are integrated in the zero-delay switching control cabinet. The output terminal of the voltage sampling chip is electrically connected to the control terminal of the solid-state relay. The input terminal of the solid-state relay is electrically connected to the output terminal of the main power module and the output terminal of the lithium iron phosphate battery pack, respectively. The output terminal of the solid-state relay is electrically connected to the load power supply terminal. The high-voltage distribution box and the zero-delay switching control cabinet achieve signal interaction and power transmission through wires.

[0005] Preferably, the lithium iron phosphate battery pack has a nominal voltage of 230.4V, a discharge rate of ≥3C, can provide an instantaneous current of ≥150A, a rated power of 34.5kW, and a total battery capacity of 7.68kWh.

[0006] Preferably, the high-voltage distribution box further includes a battery management system (BMS), the BMS integrating MOSFET shunt devices, the MOSFET shunt devices being electrically connected to each individual cell of the lithium iron phosphate battery pack, for adjusting the shunt ratio of each cell.

[0007] Preferably, the output voltage fluctuation of the bidirectional DC / AC inverter is ≤±2%, and the switching time of the solid-state relay is <10ms.

[0008] Preferably, the system also includes a heating module, which comprises a heating film, heating relays KM5 and KM6. The input terminal of heating relay KM5 is electrically connected to the positive electrode of the lithium iron phosphate battery pack, the output terminal of heating relay KM5 is electrically connected to the positive electrode of the heating film, the input terminal of heating relay KM6 is electrically connected to the negative electrode of the heating film, the output terminal of heating relay KM6 is electrically connected to the negative electrode of the lithium iron phosphate battery pack, and the control terminals of heating relays KM5 and KM6 are electrically connected to the corresponding pins of the controller in the high-voltage distribution box.

[0009] Preferably, the voltage sampling chip has a detection accuracy of 0.1%, and its sampling terminals are electrically connected to the output terminals of the main power module and the lithium iron phosphate battery pack, respectively, for acquiring real-time voltage signals from the two power sources.

[0010] Preferably, it also includes a remote control module, which adopts the Modbus RTU protocol and is electrically connected to the controller in the high-voltage distribution box via an RS485 bus. The remote control module is also connected to the factory PLC system.

[0011] Preferably, it also includes a heat dissipation module, which includes two fans and a fan control relay. The input terminal of the fan control relay is electrically connected to the output terminal of the main power module, the output terminal of the fan control relay is electrically connected to the fan power supply terminal, and the control terminal of the fan control relay is electrically connected to the corresponding pin of the controller in the high-voltage distribution box. The two fans are respectively installed in the zero-delay switching control cabinet and inside the high-voltage distribution box.

[0012] Technical effects:

[0013] The inventive technical point of this utility model lies in the use of a lithium iron phosphate battery pack with a 1P72S architecture, a solid-state relay, and a high-voltage distribution box anti-reverse current control circuit. The lithium iron phosphate battery pack with a 3C discharge rate can provide ≥150A instantaneous current, solving the problem of insufficient capacity in existing lead-acid batteries. The solid-state relay with a switching time of <10ms prevents load slippage, solving the problem of long delays in mechanical contactors. The anti-reverse current circuit prevents the battery from being impacted by grid power. This solution effectively solves the core problem of electromagnetic chuck demagnetization during grid outages in the background technology, ensuring load safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, 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.

[0015] Figure 1 This is a layout diagram of the power grid connection and core hardware modules of the temperature-wide magnetic suction new energy gantry crane emergency power supply device of this application;

[0016] Figure 2 This is a layout diagram of the internal control circuit and signal interaction of the temperature-wide magnetic suction emergency power supply device for new energy gantry cranes in this application. Detailed Implementation

[0017] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0018] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0019] To address the technical problems of existing magnetic gantry cranes where the electromagnetic chuck is prone to demagnetization and load drop when the power grid fails, and the low discharge rate of lead-acid batteries in existing UPS systems which cannot meet the instantaneous high current demand and the long switching delay of mechanical contactors.

[0020] Based on this, please refer to Figure 1-2This embodiment provides an emergency power supply device for a temperature-range magnetic gantry crane, including a main power module, a lithium iron phosphate battery pack, a high-voltage distribution box, a zero-delay switching control cabinet, a solid-state relay, and a voltage sampling chip. The main power module is connected to a 380V industrial power grid, and its output terminal is electrically connected to the input terminal of the high-voltage distribution box and the input terminal of the zero-delay switching control cabinet, respectively, for directly supplying power to the load and charging the battery pack. The lithium iron phosphate battery pack adopts a 1P72S architecture, and its positive and negative terminals are electrically connected to the corresponding terminals of the high-voltage distribution box. The high-voltage distribution box has a built-in charging and discharging anti-reverse current control circuit and protection devices. The zero-delay switching control cabinet integrates a bidirectional DC / AC inverter. The solid-state relay and voltage sampling chip are integrated in the zero-delay switching control cabinet. The output terminal of the voltage sampling chip is electrically connected to the control terminal of the solid-state relay, the input terminal of the solid-state relay is electrically connected to the output terminal of the main power module and the output terminal of the lithium iron phosphate battery pack, and the output terminal of the solid-state relay is electrically connected to the load power supply terminal. The high-voltage distribution box and the zero-delay switching control cabinet achieve signal interaction and power transmission through wires.

[0021] The main power supply module uses an industrial-grade three-phase 380V AC input module with overvoltage and overcurrent protection. Its output terminal uses a 10mm² cross-sectional area... 2The copper core power cables connect the AC input terminal of the high-voltage distribution box and the main power input terminal of the zero-delay switching control cabinet, respectively. The outer layer of the cable is wrapped with flame-retardant insulation material to adapt to the complex environment of the workshop. The lithium iron phosphate battery pack adopts a 1P72S architecture, that is, 72 lithium iron phosphate cells connected in series. Each cell has a nominal voltage of 3.2V, and the overall nominal voltage is 230.4V. The cells are high-rate square cells with a single cell capacity of 105Ah. The continuous discharge rate is ≥3C, and the instantaneous discharge rate can reach 5C. It can provide an instantaneous discharge current of ≥150A, which fully matches the high current demand of the electromagnetic chuck at the moment of power failure. The total capacity of the battery pack is calculated as 72 cells × 3.2V × 105Ah = 23184Wh ≈ 23.2kWh. In actual application, it is adjusted to 7.68kWh according to the load demand. The battery pack is fixedly installed in a metal protective shell with M8 bolts. The protective shell has an IP54 protection rating and is dustproof and waterproof, preventing workshop dust and moisture from affecting battery performance. The high-voltage distribution box uses a cold-rolled steel plate shell and integrates a 200A rated current circuit breaker, a 100A unidirectional anti-reverse current diode, a 250A fuse, and other protective devices. The charging and discharging anti-reverse current control circuit consists of a unidirectional diode connected in parallel with a 100A relay. When the power grid is supplying power normally, the diode is cut off, the relay is closed, and electrical energy flows from the main power module to the battery pack through the relay to achieve float charging. The float charging voltage is set to 230.4V. When the power grid is interrupted and the battery pack is discharging, the diode conducts and the relay is opened to prevent battery energy from flowing back into the main power module. When the power grid suddenly restores power, the voltage sampling chip detects the restoration of the main power voltage and controls the relay to close after a 500ms delay to prevent the grid voltage from impacting the battery pack. The bidirectional DC / AC inverter in the zero-delay switching control cabinet is an industrial-grade high-frequency inverter with an input voltage range of 200V-250VDC and an output voltage of 380VAC. The output voltage fluctuation is ≤±2%, ensuring a stable voltage for the electromagnetic chuck and preventing magnetic fluctuations. The solid-state relay is a DC-controlled AC type, model SSR-380D100, with a control voltage of 12VDC, a load current of 100A, and a response time of <10ms. Its control terminal is connected to a 0.75mm... 2 The signal line connects to the output of the voltage sampling chip, which is an ADS1115 model with a detection accuracy of 0.1%. It acquires the output voltage of the main power module through a voltage divider resistor. When the main power voltage is detected to be below 323V (85% of 380V), a 12VDC trigger signal is immediately output to the solid-state relay. The solid-state relay quickly switches to the lithium iron phosphate battery power supply circuit, and the entire switching process is completed within 20ms. When the voltage sampling chip detects that the main power voltage has recovered to within 380V±5% and stabilized for 500ms, it outputs a low-level signal to control the solid-state relay to switch back to main power supply. The high-voltage distribution box and the zero-delay switching control cabinet are connected by two sets of wires, one set being 4mm². 2One set of power leads is used to transmit power from the battery pack to the zero-delay switching control cabinet; the other set is 0.5mm. 2 Signal wires are used to transmit voltage sampling signals, relay control signals, etc. All wires are protected by metal corrugated tubing to prevent mechanical damage.

[0022] This technical solution addresses the problem of insufficient discharge capacity of existing lead-acid batteries by using high-rate lithium iron phosphate battery packs, solves the problem of long delays in mechanical contactors by using solid-state relays for rapid switching, and protects the battery pack by using anti-reverse current control circuits, achieving the technical effect of preventing the electromagnetic chuck from losing magnetism and the load from falling when power is off.

[0023] This addresses the technical problem of insufficient battery capacity in existing UPS systems, which prevents them from maintaining the magnetic force of electromagnetic chucks for extended periods.

[0024] Based on this, the lithium iron phosphate battery pack has a nominal voltage of 230.4V, a discharge rate of ≥3C, can provide an instantaneous current of ≥150A, a rated power of 34.5kW, and a total battery capacity of 7.68kWh.

[0025] The nominal voltage of the lithium iron phosphate battery pack is achieved by connecting 72 individual cells in series. Each individual cell has a nominal voltage of 3.2V, and the total nominal voltage after connecting 72 cells in series is 72 × 3.2V = 230.4V, which meets the power supply voltage requirements of the electromagnetic chuck. A discharge rate ≥3C means that the battery pack can discharge its rated capacity completely within 1 / 3 hour. The instantaneous discharge current is calculated by dividing the battery pack capacity by the discharge time, i.e., 7.68kWh ÷

[0026] 230.4V = 33.33Ah. The 3C discharge current is 33.33Ah × 3 = 100A. In practical applications, through cell selection optimization, the instantaneous discharge current can be increased to ≥150A, meeting the high current requirements of the electromagnetic chuck during startup. The rated power is calculated by multiplying the nominal voltage by the rated discharge current, i.e., 230.4V × 150A = 34560W ≈

[0027] The 34.5kW power supply can stably drive the electromagnetic chuck. The total battery capacity is 7.68kWh. Based on the electromagnetic chuck's rated power of 10kW, it can sustain the chuck's operation for approximately 46 minutes, sufficient for operators to safely place loads on the ground and prevent demagnetization due to insufficient capacity. The battery pack also integrates a temperature sensor to monitor cell temperature in real time, providing data support for subsequent heating and heat dissipation control.

[0028] This technical solution addresses the problem of insufficient battery capacity by clearly defining the battery pack's voltage, discharge rate, current, power, and capacity parameters, ensuring that the battery pack can meet the instantaneous and continuous power supply requirements of the electromagnetic chuck.

[0029] This addresses the technical problem of existing battery packs lacking dynamic balancing management, which can lead to over-discharge of individual cells and shorten battery life with long-term use.

[0030] Based on this, the high-voltage distribution box also includes a battery management system (BMS), which integrates MOSFET shunt devices. The MOSFET shunt devices are electrically connected to each individual cell of the lithium iron phosphate battery pack to adjust the shunt ratio of each cell.

[0031] The BMS uses an industrial-grade battery management chip, model BQ76952, which features multi-cell monitoring capabilities, simultaneously monitoring the voltage, current, and temperature of 72 individual cells. The MOSFET shunt devices are N-channel enhancement-mode MOSFETs, model IRF3205, with one MOSFET shunt device corresponding to each individual cell. The source of the MOSFET is connected to the negative terminal of the cell, the drain is grounded through a shunt resistor, and the gate is electrically connected to the control pin of the BMS. When the BMS detects that the voltage of a certain individual cell is higher than that of other cells (e.g., difference > 50mV), the BMS outputs a PWM signal to control the corresponding MOSFET of that cell to turn on, dissipating excess energy through the shunt resistor and lowering the cell voltage. When it detects that the voltage of a cell is lower than that of other cells (e.g., difference > 50mV), the BMS controls the corresponding MOSFETs of other cells to turn on, reducing the discharge pressure on the low-voltage cells and achieving dynamic balancing. At the end of the charge / discharge cycle, the BMS forcibly activates the balancing function to control the individual cell voltage difference to ≤ 20mV, preventing overcharging or over-discharging of individual cells. The BMS also communicates with the controller inside the high-voltage distribution box via the CAN bus to upload real-time status information such as SOC and SOH of the battery pack, making it easier for operators to monitor the health status of the battery.

[0032] This technical solution achieves dynamic balance management of the battery pack through the coordinated operation of the BMS and MOSFET shunt devices, avoiding over-discharge of individual cells and extending battery life.

[0033] To address the technical problems of large output voltage fluctuations in existing power switching devices, which affect the magnetic stability of the electromagnetic chuck, and long switching times leading to load slippage, the bidirectional DC / AC inverter features an output voltage fluctuation of ≤±2%, and the solid-state relay has a switching time of <10ms.

[0034] The bidirectional DC / AC inverter adopts a full-bridge topology, using IGBT devices (model FF300R12KT4) as power switches. These devices feature high-frequency switching characteristics, with a switching frequency set to 20kHz. Output voltage is controlled via PWM modulation technology. An LC filter circuit with a 1mH inductor and a 10μF capacitor is connected in parallel at the inverter's output to filter out high-frequency harmonics, keeping output voltage fluctuations within ±2%. This ensures stable voltage across the electromagnetic chuck and prevents load slippage caused by magnetic fluctuations. The solid-state relay is a DC-controlled AC type, integrating an optocoupler and a bidirectional thyristor. The control signal is completely isolated from the load circuit, preventing interference. Its switching time, measured with an oscilloscope, is <10ms, significantly faster than the 200ms of existing mechanical contactors. When the mains power fails, the solid-state relay can complete power switching before the electromagnetic chuck's magnetic force weakens, preventing load slippage. To further ensure switching reliability, the solid-state relay also features overcurrent protection. When the load current exceeds 150A, it automatically disconnects the output to protect the device.

[0035] This technical solution uses a low-fluctuation inverter and a fast-switching solid-state relay to ensure stable power supply and timely switching for the electromagnetic chuck, solving the problems of large voltage fluctuations and long switching delays in existing devices.

[0036] This addresses the technical problem of lithium iron phosphate battery packs experiencing performance degradation and inability to charge and discharge normally in low-temperature environments such as northern winters.

[0037] Based on this, a heating module is also included, which includes a heating film, heating relays KM5 and KM6. The input terminal of heating relay KM5 is electrically connected to the positive electrode of the lithium iron phosphate battery pack, the output terminal of heating relay KM5 is electrically connected to the positive electrode of the heating film, the input terminal of heating relay KM6 is electrically connected to the negative electrode of the heating film, the output terminal of heating relay KM6 is electrically connected to the negative electrode of the lithium iron phosphate battery pack, and the control terminals of heating relays KM5 and KM6 are electrically connected to the corresponding pins of the controller in the high-voltage distribution box.

[0038] The heating film is a 2mm thick, 100mm wide silicone heating film, with a length matching the battery pack protective shell. It is attached to the outside of the battery pack protective shell using thermally conductive adhesive. Each battery pack is equipped with two heating films, with a total power of 500W. Heating relays KM5 and KM6 are both electromagnetic relays, model HH52P, with a coil voltage of 24VDC and a contact current of 20A, used to control the on / off state of the heating film. The controller in the high-voltage distribution box is a PLC, model S7-200SMART. Its analog input pins are connected to the battery pack's temperature sensor to collect the cell temperature in real time. When the detected cell temperature is <-20℃ (discharge heating threshold), the controller outputs a high-level signal to close KM5 and KM6, energizing the heating film and transferring heat to the cell through the protective shell. When the cell temperature rises to -20℃, the controller outputs a low-level signal to disconnect KM5 and KM6, stopping heating. When the system is charging, if the detected cell temperature is below 0℃ (charging heating threshold), the controller will also control the heating film to operate until the temperature reaches 0℃, thus ensuring good performance of the battery pack during charging. The heating film also has an overheat protection function with a built-in thermal fuse that automatically melts when the heating film temperature exceeds 80℃ to prevent overheating damage.

[0039] This technical solution uses a heating module to control the temperature of the battery pack in low-temperature environments, thus solving the problem of poor wide-temperature adaptability of existing devices.

[0040] This addresses the technical problem of existing power monitoring devices having low detection accuracy, failing to accurately determine the voltage status of the power grid and battery pack, and causing malfunctions during switching.

[0041] Based on this, the voltage sampling chip has a detection accuracy of 0.1%, and its sampling terminals are electrically connected to the output terminals of the main power module and the lithium iron phosphate battery pack, respectively, to collect the real-time voltage signals of the two power sources.

[0042] The voltage sampling chip used is the ADS1115, a 16-bit high-precision ADC with a detection accuracy of 0.1%. It communicates with the controller inside the high-voltage distribution box via an I2C bus with a data transmission rate of 100kHz to ensure real-time performance. The chip's sampling end is connected to the main power module and the output of the lithium iron phosphate battery pack through a voltage divider circuit. The voltage divider resistor ratio on the main power side is 10:1, i.e., a 1MΩ and a 100kΩ resistor in series, which step down the 380VAC voltage to 38VAC, and then convert it to DC voltage before inputting it to the chip. The voltage divider resistor ratio on the battery pack side is 20:1, i.e., a 2MΩ and a 100kΩ resistor in series, which step down the 230.4VDC voltage to 11.52VDC before inputting it to the chip. The chip samples the voltage signal every 100ms. When the main power supply voltage is below 323V or above 418V, it is determined to be a grid abnormality, triggering a power switch. When the battery pack voltage is below 200V, it is determined to be a battery undervoltage, and an alarm signal is output to remind the operator to charge the battery in time. To ensure sampling reliability, metal film resistors with an accuracy of 0.1% and a temperature coefficient of ±50ppm / ℃ are selected for the voltage divider resistors to avoid the impact of ambient temperature changes on sampling accuracy.

[0043] This technical solution uses a high-precision voltage sampling chip to accurately monitor the voltage status of the two power supplies, avoid switching malfunctions, and improve system reliability.

[0044] This addresses the technical problem that existing emergency power supply devices lack remote monitoring capabilities, requiring operators to check the status on-site and thus unable to obtain fault information and battery health status in a timely manner.

[0045] Based on this, a remote control module is also included. The remote control module adopts the Modbus RTU protocol and is electrically connected to the controller in the high-voltage distribution box via an RS485 bus. The remote control module is also connected to the factory PLC system.

[0046] The remote control module uses an industrial-grade RS485 communication module, model USR-TCP232-410S, which features RS485 to Ethernet conversion. Its RS485 port is electrically connected to the RS485 pin of the controller in the high-voltage distribution box via a twisted-pair cable. The communication baud rate is set to 9600bps, with 8 data bits, 1 stop bit, and no parity bit, conforming to the Modbus RTU protocol. The Ethernet port of the remote control module connects to the switch of the factory PLC system for data exchange. Through this module, the factory PLC system can obtain the real-time operating status of the emergency power supply, including main power voltage, battery voltage, battery SOC, SOH, charging / discharging status, and fault information. It can also send control commands, such as manual forced switching test, starting charging, and stopping discharging. When a system fault occurs, the remote control module can also send an alarm signal to the PLC system, triggering the factory's audible and visual alarms to alert operators for timely handling. To ensure communication security, CRC checksums are used for communication data to prevent data transmission errors.

[0047] This technical solution enables remote monitoring and control of emergency power supply devices through a remote control module, reducing on-site operations and improving management efficiency.

[0048] This addresses the technical problem of heat generated during the charging and discharging process of emergency power supply devices, especially in high-temperature environments, where excessively high device temperatures lead to performance degradation or damage.

[0049] Based on this, a heat dissipation module is also included. The heat dissipation module includes two fans and a fan control relay. The input terminal of the fan control relay is electrically connected to the output terminal of the main power module, the output terminal of the fan control relay is electrically connected to the fan power supply terminal, and the control terminal of the fan control relay is electrically connected to the corresponding pin of the controller in the high-voltage distribution box. The two fans are respectively installed in the zero-delay switching control cabinet and inside the high-voltage distribution box.

[0050] The fans are axial flow fans, model 4028, measuring 40mm×40mm×28mm, with a rated voltage of 24VDC, a rated current of 0.3A, an airflow of 8CFM, and a speed of 5000rpm. They feature low noise and long lifespan. The two fans are fixed with screws to the side ventilation holes of the zero-delay switching control cabinet and the high-voltage distribution box, respectively. The fan outlets face outwards to create air convection and accelerate heat dissipation. The fan control relay is an electromagnetic relay, model HH52P, with a coil voltage of 24VDC and a contact current of 5A. Its control terminal is electrically connected to the IO pin of the controller inside the high-voltage distribution box. The controller collects the internal temperature of the control cabinet and distribution box through a temperature sensor. When the temperature exceeds 45℃ (the heat dissipation start-up threshold), it outputs a high-level signal to close the relay, energizing the fan; when the temperature is below 35℃, it outputs a low-level signal to open the relay, stopping the fan. The fan also has a stall protection function. When the fan cannot rotate due to dust blockage, if the current exceeds 0.5A, the internal protection circuit will automatically cut off the power supply to prevent it from burning out.

[0051] This technical solution controls the internal temperature of the device through a heat dissipation module, preventing the device from being damaged by high temperatures and improving the stability of the system in high-temperature environments.

[0052] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the connection methods and control methods involved are all conventional connection methods and control methods unless otherwise specified.

[0053] The present invention has been described in detail above with reference to the embodiments. However, those skilled in the art will understand that, without departing from the spirit of the present invention, various specific parameters in the above embodiments can be changed to form multiple specific embodiments, all of which are common variations of the present invention, and will not be described in detail here.

Claims

1. An emergency power supply device for a wide-temperature-range magnetic suction type new energy gantry crane, characterized in that, The system includes a main power module, a lithium iron phosphate battery pack, a high-voltage distribution box, a zero-delay switching control cabinet, a solid-state relay, and a voltage sampling chip. The main power module is connected to a 380V industrial power grid, and its output terminals are electrically connected to the input terminals of the high-voltage distribution box and the zero-delay switching control cabinet, respectively, to directly supply power to the load and charge the battery pack. The lithium iron phosphate battery pack adopts a 1P72S architecture, and its positive and negative terminals are electrically connected to the corresponding terminals of the high-voltage distribution box. The high-voltage distribution box has a built-in charging and discharging anti-reverse current control circuit and protection devices. The zero-delay switching control cabinet integrates a bidirectional DC / AC inverter. The solid-state relay and voltage sampling chip are integrated within the zero-delay switching control cabinet. The output terminal of the voltage sampling chip is electrically connected to the control terminal of the solid-state relay, and the input terminals of the solid-state relay are electrically connected to the output terminals of the main power module and the lithium iron phosphate battery pack, respectively. The output terminal of the solid-state relay is electrically connected to the load power supply terminal. The high-voltage distribution box and the zero-delay switching control cabinet achieve signal interaction and power transmission through wires.

2. The emergency power supply device for a wide-temperature-range magnetic suction type new energy gantry crane according to claim 1, characterized in that, The lithium iron phosphate battery pack has a nominal voltage of 230.4V, a discharge rate of ≥3C, can provide an instantaneous current of ≥150A, a rated power of 34.5kW, and a total battery capacity of 7.68kWh.

3. The emergency power supply device for a wide-temperature-range magnetic suction new energy gantry crane according to claim 1, characterized in that, The high-voltage distribution box also includes a battery management system (BMS), which integrates MOSFET shunt devices. The MOSFET shunt devices are electrically connected to each individual cell of the lithium iron phosphate battery pack to adjust the shunt ratio of each cell.

4. The emergency power supply device for a wide-temperature-range magnetic suction new energy gantry crane according to claim 1, characterized in that, The output voltage fluctuation of the bidirectional DC / AC inverter is ≤±2%, and the switching time of the solid-state relay is <10ms.

5. The emergency power supply device for a wide-temperature-range magnetic suction new energy gantry crane according to claim 1, characterized in that, It also includes a heating module, which includes a heating film, heating relays KM5 and KM6. The input terminal of heating relay KM5 is electrically connected to the positive terminal of the lithium iron phosphate battery pack, and the output terminal of heating relay KM5 is electrically connected to the positive terminal of the heating film. The input terminal of heating relay KM6 is electrically connected to the negative terminal of the heating film, and the output terminal of heating relay KM6 is electrically connected to the negative terminal of the lithium iron phosphate battery pack. The control terminals of heating relays KM5 and KM6 are electrically connected to the corresponding pins of the controller in the high-voltage distribution box.

6. The emergency power supply device for a wide-temperature-range magnetic suction new energy gantry crane according to claim 1, characterized in that, The voltage sampling chip has a detection accuracy of 0.1%, and its sampling terminals are electrically connected to the output terminals of the main power module and the lithium iron phosphate battery pack, respectively, to collect real-time voltage signals from the two power sources.

7. The emergency power supply device for a wide-temperature-range magnetic suction type new energy gantry crane according to claim 1, characterized in that, It also includes a remote control module, which adopts the Modbus RTU protocol and is electrically connected to the controller in the high-voltage distribution box via an RS485 bus. The remote control module is also connected to the factory PLC system.

8. The emergency power supply device for a wide-temperature-range magnetic suction new energy gantry crane according to claim 1, characterized in that, It also includes a heat dissipation module, which includes two fans and a fan control relay. The input terminal of the fan control relay is electrically connected to the output terminal of the main power module, the output terminal of the fan control relay is electrically connected to the fan power supply terminal, and the control terminal of the fan control relay is electrically connected to the corresponding pin of the controller in the high-voltage distribution box. The two fans are respectively installed in the zero-delay switching control cabinet and inside the high-voltage distribution box.

Images