Efficient induction power taking device

Abstract

The utility model relates to the technical field of power supply of power system monitoring equipment, in particular to a high-efficiency induction power taking device. The system comprises an energy capture module, a rectification filtering module, an intelligent voltage stabilization module and an energy storage switching module. An alternating magnetic field around a high-voltage power transmission line is coupled to the winding through the energy capture module and is converted into alternating current through electromagnetic induction, the rectifying and filtering module converts the alternating current into direct current through a rectifying and filtering circuit, and the intelligent voltage stabilizing module converts unstable direct current into stable voltage output through a DC-DC voltage stabilizing circuit. The output voltage is dynamically adjusted according to the fluctuation range of the direct current, the energy storage switching module stores redundant electric energy to the lithium battery pack when the line current is sufficient, and the lithium battery pack seamlessly switches power supply through the diode isolation circuit when the line current is insufficient, so that the output voltage is dynamically adjusted according to the fluctuation of the line current. And the efficiency and the stability of the induction power taking device are improved.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology for power system monitoring equipment, and more specifically, to a high-efficiency inductive power extraction device. Background Technology

[0002] Inductive power extraction technology uses the principle of electromagnetic induction to extract electrical energy from the magnetic field around high-voltage transmission lines. It is an important means of powering online monitoring equipment. With the advancement of smart grid construction, the number of online monitoring equipment for transmission lines (such as fault location devices, temperature sensors, vibration monitors, etc.) has surged, placing higher demands on the stability and reliability of the power supply system.

[0003] Currently, traditional inductive power extraction devices have insufficient output power under low current conditions (<50A), making it difficult to meet the continuous operation requirements of monitoring equipment. In ultra-high voltage lines and new energy grid-connected scenarios, the transmission line current fluctuates widely (5A-1000A), and the environmental conditions are harsh (-40℃ to 85℃). Traditional rectifier and filter circuits lack dynamic adjustment functions and cannot adapt to the wide range of fluctuations in line current (such as lightning strikes and short-circuit transient currents). In order to ensure the output power of the power extraction device under low current conditions, we propose a high-efficiency inductive power extraction device by using an intelligent voltage regulator circuit to dynamically adjust the output voltage, adapt to line current fluctuations, and improve power supply stability. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency inductive power extraction device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a high-efficiency inductive power extraction device, including an energy capture module, a rectification and filtering module, an intelligent voltage regulation module, and an energy storage switching module. The energy capture module is connected to the rectification and filtering module, the rectification and filtering module is connected to the intelligent voltage regulation module, and the intelligent voltage regulation module is connected to the energy storage switching module.

[0006] The energy capture module couples the alternating magnetic field around the high-voltage transmission line to the winding through a C-shaped iron core, converting it into alternating current through electromagnetic induction. The rectifier and filter module uses a rectifier and filter circuit to convert the alternating current into direct current. The intelligent voltage regulator module uses a DC-DC voltage regulator circuit to convert the unstable direct current into a stable voltage output and dynamically adjusts the output voltage according to the fluctuation range of the direct current. At the same time, the energy storage switching module stores excess energy in the lithium battery pack when the line current is sufficient, and seamlessly switches the power supply to the lithium battery pack through a diode isolation circuit when the line current is insufficient.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0008] 1. This high-efficiency inductive power harvesting device utilizes the alternating magnetic field around the high-voltage transmission line generated by the energy capture module. This magnetic field is coupled to the winding through a C-shaped iron core, generating an induced electromotive force. This electromotive force is then converted into alternating current through electromagnetic induction. The device employs a high-permeability nanocrystalline alloy iron core to reduce hysteresis loss and eddy current heating, thereby improving power harvesting efficiency. The rectifier and filter module uses a rectifier and filter circuit to perform full-bridge synchronous rectification of the alternating current, converting it into direct current, and then filters it to reduce voltage fluctuations.

[0009] 2. The intelligent voltage regulator module uses a DC-DC voltage regulator circuit to convert unstable DC power into a stable voltage output. Based on the fluctuation range of the DC power, it uses a PWM control chip to dynamically adjust the duty cycle of the PWM signal to compensate for voltage changes and adapt to line current fluctuations, significantly improving power supply stability. When the line current is sufficient, the energy storage switching module stores excess energy in the lithium battery pack. When the line current is insufficient, the lithium battery pack seamlessly switches power supply through a diode isolation circuit to ensure the normal operation of the load and improve energy utilization.

[0010] As a further improvement to this technical solution, the rectifier and filter module includes a rectifier and filter circuit, wherein the rectifier and filter circuit includes a transformer T and a rectifier bridge BG and an inductor L1 connected to the secondary winding of the transformer T.

[0011] The main winding of the transformer T is connected to the high-voltage transmission line. One end of the rectifier bridge BG is connected to the resistor R1 and the capacitor C1. The other end of the rectifier bridge BG is connected to the positive terminal of the Zener diode VD, the capacitor C1, and the other end of the capacitor C2. The inductor L1 is connected to the negative terminal of the Zener diode VD and the other end of the capacitor C2.

[0012] The beneficial effect of the above-mentioned further improvements is that the voltage of AC power changes sinusoidally over time, while electronic devices usually require a stable DC voltage to work properly. After the full-bridge synchronous rectifier circuit converts AC power into DC power, the filter circuit can effectively smooth the fluctuations of DC voltage, making its output more stable and providing a stable power supply for subsequent circuits.

[0013] As a further improvement to this technical solution, the intelligent voltage regulator module includes a DC-DC voltage regulator circuit, wherein the DC-DC voltage regulator circuit includes a voltage regulator LM2596, an inductor L1, and a diode D;

[0014] Pin 1 of the voltage regulator LM2596 is connected to one end of capacitor C5, and in turn to one end of capacitor C3 and the positive terminal of power supply VCC. Pin 2 of the voltage regulator LM2596 is connected to the negative terminal of diode D, and in turn to one end of inductor L2. The other end of inductor L2 is connected to one end of capacitor C4 and one end of capacitor C6. Pin 4 of the voltage regulator LM2596 is connected to one end of resistor R1, and in turn to one end of resistor R2. The other end of resistor R1 is connected to one end of capacitor C6 and is connected to the output VOUT. Pins 3 and 5 of the voltage regulator LM2596 are both grounded.

[0015] The beneficial effect of adopting the above-mentioned further improvements is that when the input voltage changes due to power fluctuations (such as battery discharge, grid fluctuations) or load changes, the DC-DC voltage regulator circuit can automatically adjust the duty cycle to maintain a stable output voltage. The dynamic adjustment mechanism can avoid equipment restart due to sudden drop in input voltage or damage to sensitive components due to overvoltage.

[0016] As a further improvement to this technical solution, the intelligent voltage regulator module samples the output voltage through a resistor divider network composed of resistors R1 and R2, compares it with a reference voltage, and uses a PWM control chip to dynamically adjust the duty cycle of the PWM signal to compensate for voltage changes.

[0017] The beneficial effect of adopting the above-mentioned further improvements is that when the load current suddenly increases, the output voltage may drop instantaneously. The feedback system can quickly compensate for the voltage drop by increasing the duty cycle, so that the output can be restored to the set value. When the input voltage changes due to power supply fluctuations or battery discharge, the feedback system automatically adjusts the duty cycle to maintain a stable output.

[0018] As a further improvement to this technical solution, the C-shaped iron core in the energy harvesting module adopts a high magnetic permeability nanocrystalline alloy iron core and a split C-shaped structure.

[0019] The beneficial effect of the above-mentioned further improvements is that the nanocrystalline alloy has extremely high magnetic permeability, which means that it can conduct magnetism more efficiently. Under the same excitation conditions, a high-permeability iron core can produce a stronger magnetic field, or require a smaller excitation current to achieve the same magnetic field strength. This helps to improve the efficiency of electromagnetic devices and reduce energy consumption.

[0020] As a further improvement to this technical solution, the lithium battery pack of the energy storage switching module is equipped with BMS management, including overcharge protection, over-discharge protection and temperature protection.

[0021] As a further improvement to this technical solution, the energy storage switching module adopts a constant current and constant voltage staged charging strategy and sets a SOC threshold to protect the lithium battery pack from discharge.

[0022] The beneficial effects of the above-mentioned further improvements are that the overcharge, over-discharge and temperature protection functions of the BMS are the cornerstone of the safe and reliable operation of lithium batteries. They not only avoid battery damage and safety hazards, but also optimize battery performance and extend service life through functions such as balancing and monitoring.

[0023] By using constant current and constant voltage staged charging to bring the battery close to full charge, and by using SOC threshold protection to prevent deep discharge, usable capacity is increased, battery replacement frequency is reduced, and total cost of ownership of the system is reduced. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall process of this utility model;

[0025] Figure 2 This is a rectifier and filter circuit diagram of the present invention;

[0026] Figure 3 This is a diagram of the DC-DC voltage regulator circuit of this utility model;

[0027] Figure 4 This is a flowchart illustrating the overall architecture of this utility model;

[0028] Figure 5 This is a schematic diagram of the C-shaped iron core structure of this utility model;

[0029] Figure 6 This is a schematic diagram of the energy storage switching of this utility model.

[0030] The meanings of the labels in the diagram are as follows:

[0031] 100. Energy capture module; 200. Rectifier and filter module; 300. Intelligent voltage regulator module; 400. Energy storage switching module. Detailed Implementation

[0032] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] Traditional induction power extraction devices have insufficient output power under low current conditions (<50A), making it difficult to meet the continuous operation requirements of monitoring equipment. In ultra-high voltage lines and new energy grid-connected scenarios, the transmission line current fluctuates widely (5A-1000A), and the environmental conditions are harsh (-40℃ to 85℃). Traditional rectifier and filter circuits lack dynamic adjustment functions and cannot adapt to the wide range of fluctuations in line current (such as lightning strikes and short-circuit transient currents). In order to ensure the output power of the power extraction device under low current conditions, an intelligent voltage regulator circuit is used to dynamically adjust the output voltage to adapt to line current fluctuations and improve power supply stability.

[0034] like Figure 1 As shown, this utility model provides a high-efficiency inductive power harvesting device, including an energy harvesting module 100, a rectification and filtering module 200, an intelligent voltage stabilizing module 300, and an energy storage switching module 400. The energy harvesting module 100 is connected to the rectification and filtering module 200, the rectification and filtering module 200 is connected to the intelligent voltage stabilizing module 300, and the intelligent voltage stabilizing module 300 is connected to the energy storage switching module 400.

[0035] The energy capture module 100 couples the alternating magnetic field around the high-voltage transmission line to the winding through a C-shaped iron core, and converts it into alternating current through electromagnetic induction. The rectifier and filter module 200 uses a rectifier and filter circuit to convert the alternating current into direct current. The intelligent voltage regulator module 300 uses a DC-DC voltage regulator circuit to convert the unstable direct current into a stable voltage output, and dynamically adjusts the output voltage according to the fluctuation range of the direct current. At the same time, the energy storage switching module 400 stores excess energy in the lithium battery pack when the line current is sufficient, and seamlessly switches the power supply to the lithium battery pack through a diode isolation circuit when the line current is insufficient.

[0036] like Figure 4 As shown, the induction coil unit is connected to the high-voltage transmission line through a C-shaped iron core, converting electromagnetic induction into alternating current. The alternating current is then converted into direct current through a rectifier and filter circuit. The unstable direct current is converted into a stable voltage output using an intelligent voltage regulator circuit to power the monitoring equipment. Excess electrical energy is stored in the lithium battery pack, and the power supply is switched during low current conditions to ensure the normal operation of the load.

[0037] like Figure 2 As shown, the rectifier and filter module 200 includes a rectifier and filter circuit, wherein the rectifier and filter circuit includes a transformer T and a rectifier bridge BG and an inductor L1 connected to the secondary winding of the transformer T.

[0038] The main winding of transformer T is connected to the high-voltage transmission line. One end of rectifier bridge BG is connected to resistor R1 and capacitor C1. The other end of rectifier bridge BG is connected to the positive terminal of Zener diode VD, capacitor C1 and the other end of capacitor C2. Inductor L1 is connected to the negative terminal of Zener diode VD and the other end of capacitor C2.

[0039] In this circuit, AC power is converted into pulsating DC power through rectifier bridge BG, and then smoothed and filtered by capacitors C1 and C2. Finally, constant voltage DC power is output by Zener diode VD, realizing the conversion of AC power to DC power and ensuring that the main control chip can work normally.

[0040] like Figure 3 As shown, the intelligent voltage regulator module 300 includes a DC-DC voltage regulator circuit, which includes a voltage regulator LM2596, an inductor L1, and a diode D;

[0041] Pin 1 of voltage regulator LM2596 is connected to one end of capacitor C5, and in turn to one end of capacitor C3 and the positive terminal of power supply VCC. Pin 2 of voltage regulator LM2596 is connected to the negative terminal of diode D, and in turn to one end of inductor L2. The other end of inductor L2 is connected to one end of capacitor C4 and one end of capacitor C6. Pin 4 of voltage regulator LM2596 is connected to one end of resistor R1, and in turn to one end of resistor R2. The other end of resistor R1 is connected to one end of capacitor C6 and in turn to output VOUT. Pins 3 and 5 of voltage regulator LM2596 are both grounded.

[0042] In this circuit, resistors R1 and R2 form a feedback network to detect the output voltage and feed the output voltage information back to the LM2596 voltage regulator chip. The chip automatically adjusts the duty cycle of the PWM signal based on the comparison between the feedback voltage and the internal reference voltage (1.23V), thereby accurately stabilizing the output voltage. Inductor L2 stores energy. When the internal switching transistor of the LM2596 voltage regulator is turned on, inductor L2 stores energy. When the switching transistor is turned off, inductor L2 releases energy to maintain the continuity of the output current. Diode D provides a freewheeling path for inductor L2 during the off-state of the switching transistor, preventing the back electromotive force generated by inductor L2 from damaging the chip. Output capacitor C4 is used to smooth the output voltage and filter out high-frequency ripple in the output voltage, making the output voltage more stable.

[0043] When the input current changes, the output voltage tends to increase, and the feedback voltage also increases. The comparator inside the LM2596 voltage regulator chip compares the feedback voltage with the reference voltage, then reduces the duty cycle of the PWM signal. This shortens the on-time and lengthens the off-time of the internal switching transistor, reducing the energy stored in inductor L2 and lowering the output voltage to restore it to the set value. Conversely, when the input voltage decreases or the load increases, the output voltage tends to decrease, and the chip increases the duty cycle of the PWM signal to raise the output voltage to the set value, thus achieving intelligent voltage regulation.

[0044] In order to better compensate for voltage changes, the intelligent voltage regulator module 300 samples the output voltage through a resistor divider network composed of resistors R1 and R2 and compares it with the reference voltage. It also uses a PWM control chip to dynamically adjust the duty cycle of the PWM signal to compensate for voltage changes.

[0045] The resistor divider network (resistors R1 and R2) monitors the output voltage in real time and compares it with the reference voltage (1.23V from the LM2596 regulator). The PWM chip automatically adjusts the duty cycle to ensure stable output voltage. When the load current suddenly increases (such as when the processor is running at full load), the output voltage may drop instantaneously. The feedback system quickly compensates for the voltage drop by increasing the duty cycle, restoring the output to the set value. When the input voltage changes due to power fluctuations or battery discharge, the feedback system automatically adjusts the duty cycle to maintain stable output.

[0046] In order to better reduce hysteresis loss and eddy current heating and improve power harvesting efficiency, the C-shaped iron core in the energy harvesting module 100 adopts a high magnetic permeability nanocrystalline alloy iron core and adopts a split C-shaped structure.

[0047] like Figure 5 As shown, the C-type iron core is made of nanocrystalline alloy (model FinemetFT-3M), with a magnetic permeability ≥100000H / m and a saturation magnetic induction intensity of 1.2T, reducing hysteresis loss. The split C-type iron core has a cross-sectional size of 20mm×30mm and a closing gap of <0.1mm, reducing magnetic resistance.

[0048] Winding design: 50 turns of Litz wire (0.5mm diameter), multi-strand stranded structure (7×0.2mm single wire) to reduce high-frequency eddy current losses;

[0049] Insulation treatment: Wrapped in double-layer polyimide film, passed the 3kV power frequency withstand voltage test (50Hz / 1min);

[0050] The split-type buckle design is compatible with wires from Φ10mm to Φ50mm, and can be quickly installed without power interruption, with an installation time of less than 10 minutes.

[0051] The outer shell is encapsulated with epoxy resin (UL94V-0 flame retardant rating), with an IP68 protection rating, and is resistant to ultraviolet radiation and salt spray corrosion.

[0052] The split C-type structure can be easily opened and closed, facilitating the installation of windings and other components onto the iron core. Especially for some large or complex electromagnetic equipment, this structure can reduce assembly difficulty and improve production efficiency. During equipment maintenance or repair, the iron core can also be easily disassembled to inspect and replace internal windings, insulation, and other components without disassembling the entire equipment, thus reducing maintenance time and costs.

[0053] In order to better store energy in lithium battery packs, the energy storage switching module 400 is equipped with BMS management for lithium battery packs, including overcharge protection, over-discharge protection and temperature protection.

[0054] Lithium iron phosphate battery (capacity 20Ah), nominal voltage 3.2V, supports wide operating temperature range of -20℃ to 60℃, BMS management is as follows:

[0055] Overcharge protection: Cuts off when the individual cell voltage is ≥3.65V;

[0056] Over-discharge protection: Cuts off when the individual cell voltage is ≤2.5V;

[0057] Temperature protection: Heating film activates at -20℃, forced heat dissipation at 60℃;

[0058] Overcharging lithium batteries can lead to electrolyte decomposition, lithium deposition, and heat generation, potentially causing thermal runaway in extreme cases. Overcharge protection detects battery voltage and cuts off the charging circuit when a threshold is reached to prevent danger. Over-discharging lithium batteries (e.g., voltage below 2.5V / Cell) can cause electrode material structure collapse, a sharp increase in internal resistance, and even irreversible capacity loss. Over-discharge protection automatically disconnects the load when the voltage drops to a threshold (e.g., 2.5V / Cell) to protect the battery. When the battery temperature exceeds 60°C, the BMS prevents thermal runaway by reducing the charging current or cutting off the circuit.

[0059] In order to better formulate the charging and discharging strategy of the lithium battery pack, the energy storage switching module 400 adopts a constant current and constant voltage staged charging strategy and sets a SOC threshold to protect the lithium battery pack from discharge.

[0060] When the lithium battery's SOC is low (e.g., 0% to 80%), it is charged with a constant high current (e.g., 1C) to allow the battery to quickly reach a higher capacity. For example, a 5Ah battery can be charged to 80% capacity in 1 hour when charged with a 5A current. During the constant current phase, the battery's internal resistance is low, the energy conversion efficiency is high (usually >90%), and heat loss is reduced.

[0061] When the battery voltage approaches its upper limit (e.g., 4.2V / Cell), it switches to constant voltage charging, and the current gradually decreases to avoid problems such as electrolyte decomposition and lithium plating caused by overcharging. By limiting the maximum voltage, structural damage to the electrode materials is reduced, and the cycle life can be increased by more than 30%. For example, by reducing the charging cut-off voltage from 4.2V to 4.1V, the number of lithium battery cycles can be increased from 500 to 800.

[0062] like Figure 6As shown, when the line current is greater than or equal to 5A, the C-type iron core couples the alternating magnetic field around the high-voltage transmission line to the winding for induction energy extraction and power supply, and stores the excess energy in the lithium battery pack. Through the BMS management of the lithium battery pack, the lithium battery pack is overcharged when the single cell voltage exceeds 3.65V, and over-discharged when the single cell voltage is lower than 2.5V, as well as temperature protection.

[0063] When the line current is less than 5A, switch to lithium battery power supply with a switching time of ≤8ms to ensure uninterrupted power supply to the equipment.

[0064] In summary, the working principle of this solution is as follows:

[0065] This high-efficiency inductive power harvesting device utilizes the alternating magnetic field around the high-voltage transmission line generated by the energy capture module 100, which is coupled to the winding through a C-shaped iron core to generate an induced electromotive force. This electromotive force is then converted into alternating current through electromagnetic induction. The device employs a high-permeability nanocrystalline alloy iron core to reduce hysteresis loss and eddy current heating, thereby improving power harvesting efficiency. The rectifier and filter module 200 uses a rectifier and filter circuit to perform full-bridge synchronous rectification of the alternating current, converting it into direct current, and then filters it to reduce voltage fluctuations.

[0066] The intelligent voltage regulator module 300 uses a DC-DC voltage regulator circuit to convert unstable DC power into a stable voltage output. Based on the fluctuation range of the DC power, it uses a PWM control chip to dynamically adjust the duty cycle of the PWM signal to compensate for voltage changes and adapt to line current fluctuations, significantly improving power supply stability. The energy storage switching module 400 stores excess energy in the lithium battery pack when the line current is sufficient. When the line current is insufficient, the lithium battery pack seamlessly switches power supply through a diode isolation circuit to ensure the normal operation of the load and improve energy utilization.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high efficiency inductive power pick-up device characterized by: It includes an energy capture module (100), a rectification and filtering module (200), an intelligent voltage regulator module (300), and an energy storage switching module (400). The energy capture module (100) is connected to the rectification and filtering module (200), the rectification and filtering module (200) is connected to the intelligent voltage regulator module (300), and the intelligent voltage regulator module (300) is connected to the energy storage switching module (400). The energy capture module (100) couples the alternating magnetic field around the high-voltage transmission line to the winding through the C-type iron core, and converts it into alternating current through electromagnetic induction. The rectifier and filter module (200) converts the alternating current into direct current using the rectifier and filter circuit. The intelligent voltage regulator module (300) converts the unstable direct current into a stable voltage output using the DC-DC voltage regulator circuit, and dynamically adjusts the output voltage according to the fluctuation range of the direct current. At the same time, the energy storage switching module (400) stores excess energy in the lithium battery pack when the line current is sufficient, and seamlessly switches the power supply to the lithium battery pack through the diode isolation circuit when the line current is insufficient.

2. The high efficiency inductive power pickup of claim 1, wherein: The rectifier and filter module (200) includes a rectifier and filter circuit, wherein the rectifier and filter circuit includes a transformer T and a rectifier bridge BG and an inductor L1 connected to the secondary winding of the transformer T; The main winding of the transformer T is connected to the high-voltage transmission line. One end of the rectifier bridge BG is connected to resistor R1 and capacitor C1. The other end of the rectifier bridge BG is connected to the positive terminal of Zener diode VD, capacitor C1, and the other end of capacitor C2. The inductor L1 is connected to the negative terminal of Zener diode VD and the other end of capacitor C2.

3. The high efficiency inductive power pickup of claim 1, wherein: The intelligent voltage regulator module (300) includes a DC-DC voltage regulator circuit, wherein the DC-DC voltage regulator circuit includes a voltage regulator LM2596, an inductor L1 and a diode D; Pin 1 of the voltage regulator LM2596 is connected to one end of capacitor C5, and in turn to one end of capacitor C3 and the positive terminal of power supply VCC. Pin 2 of the voltage regulator LM2596 is connected to the negative terminal of diode D, and in turn to one end of inductor L2. The other end of inductor L2 is connected to one end of capacitor C4 and one end of capacitor C6. Pin 4 of the voltage regulator LM2596 is connected to one end of resistor R1, and in turn to one end of resistor R2. The other end of resistor R1 is connected to one end of capacitor C6 and is connected to the output VOUT. Pins 3 and 5 of the voltage regulator LM2596 are both grounded.

4. The high efficiency inductive power pickup of claim 3, wherein: The intelligent voltage regulator module (300) samples the output voltage through a resistor divider network composed of resistors R1 and R2, compares it with the reference voltage, and uses a PWM control chip to dynamically adjust the duty cycle of the PWM signal to compensate for voltage changes.

5. The high efficiency inductive power pickup of claim 1, wherein: The C-type core in the energy capture module (100) is made of high permeability nanocrystalline alloy and has a split C-type structure.

6. The high efficiency inductive power pickup of claim 1, wherein: The lithium battery pack of the energy storage switching module (400) is configured with BMS management, including overcharge protection, over-discharge protection and temperature protection.

7. The high efficiency inductive power pickup of claim 1, wherein: The energy storage switching module (400) adopts a constant current and constant voltage staged charging strategy and sets a SOC threshold to protect the lithium battery pack from discharge.

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