A quick connection device for power supply of energy storage vehicle

Abstract

The invention discloses a power supply quick connection device for an energy storage vehicle, aiming to overcome the problems of inconvenient construction, long operation time and poor detection effect in the prior art. The device comprises a first connection cylinder, a second connection cylinder and a third connection cylinder which are fixed together in sequence from the outside to the inside, the axis of the first connection cylinder, the axis of the second connection cylinder and the axis of the third connection cylinder coincide with each other, a first guide block is fixedly provided on the inner side wall of the first connection cylinder, a second guide block is fixedly provided on the outer side wall of the second connection cylinder, a third guide groove is provided on the outer side wall of the third connection cylinder, a temperature sensor is provided on the first guide block, and a contact pressure sensor is provided on the second guide block.

Description

Technical Field

[0001] The invention belongs to an emergency electric energy system, in particular to a power supply quick connection device for an energy storage vehicle. Background Art

[0002] The mobile emergency power supply in the form of a vehicle can also be called an energy storage vehicle, which generally uses electrochemical lithium batteries. In the field of emergency power supply and power protection of distribution networks, especially in the field of non-stop power supply operations, energy storage vehicles are increasingly widely used as emergency power supplies in distribution network maintenance and fault repair.

[0003] At present, energy storage vehicles and external electrical equipment generally use flexible cables to achieve electrical connection. During on-site operations, it is found that the electrical connection structure between the energy storage vehicle and the external electrical equipment has many inconveniences, such as (1) inconvenient construction, which requires high quality and technical requirements for construction personnel, and failure is very likely to occur if the installation is improper; (2) the operation time is long, and a power outage for several hours is required for a single connection operation, which cannot solve the problem of fast live plugging and unplugging between the two; (3) due to the large gap between the conductive core and the insulating jacket in the flexible cable, this can easily lead to local discharge and heat generation problems. The existing flexible cables lack a structure for monitoring temperature. Summary of the invention

[0004] In order to overcome the deficiencies and existing problems in the prior art, the present invention provides a power quick connection device for an energy storage vehicle.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A quick connection device for a power supply of an energy storage vehicle comprises a first connection cylinder, a second connection cylinder and a third connection cylinder which are fixed together in sequence from outside to inside, the axis of the first connection cylinder, the axis of the second connection cylinder and the axis of the third connection cylinder coincide with each other, a first guide block is fixedly provided on the inner side wall of the first connection cylinder, a second guide block is fixedly provided on the outer side wall of the second connection cylinder, a third guide groove is provided on the outer side wall of the third connection cylinder, a temperature sensor is provided on the first guide block, and a contact pressure sensor is provided on the second guide block.

[0007] Preferably, a rotatable fixing ring is sleeved on the first connecting tube, and a buckle is provided on the first connecting tube, and the buckle can be plugged into the fixing ring.

[0008] Preferably, an insulating front sleeve and an insulating rear sleeve are respectively sleeved on the first connecting cylinder, a shaft shoulder is formed on the insulating rear sleeve, and the insulating front sleeve and the insulating rear sleeve are respectively arranged at two ends of the fixing ring.

[0009] Preferably, the third connecting cylinder comprises a guide cylinder, an inner side wall of which is provided with elastic blades, there are at least two elastic blades, and more than two elastic contact pieces are evenly arranged on the inner side wall of the guide cylinder, and the cross section of the elastic blades is wavy.

[0010] Preferably, the elastic blades are made of glassy copper alloy, and the surface of the glassy copper alloy is silver-plated.

[0011] Preferably, the third connecting tube also includes a first sleeve and a second sleeve, the first sleeve, the second sleeve and the guide sleeve are arranged together in sequence from outside to inside, the first sleeve is made of insulating material, the second sleeve is made of semiconductor, and the insulating material is carborundum silicone material.

[0012] Preferably, a detection system is also included, which includes a low-voltage electronic synchronous voltage mutual inductance circuit, a high-gain micro-signal amplification circuit, a low-power microprocessor, a wireless baseband chip and an RF antenna, the temperature sensor and the contact pressure sensor are respectively electrically connected to the high-gain micro-signal amplification circuit, the high-gain micro-signal amplification circuit is electrically connected to the low-power microprocessor, the low-power microprocessor is electrically connected to the wireless baseband chip, the wireless baseband chip is electrically connected to the RF antenna, and the high-gain micro-signal amplification circuit, the low-power microprocessor and the wireless baseband chip are also respectively electrically connected to the low-voltage electronic synchronous voltage mutual inductance circuit.

[0013] Preferably, the low-voltage electronic synchronous voltage mutual inductance circuit includes a miniature current mutual inductance coil, a current-voltage conversion amplifier circuit, an integration circuit, a phase correction circuit, a rectification circuit, a power amplifier circuit and a feedback circuit. The miniature current mutual inductance coil, the current-voltage conversion amplifier circuit, the integration circuit, the phase correction circuit, the rectification circuit and the power amplifier circuit are electrically connected together in sequence, and the output end of the rectification circuit, the phase correction circuit and the integration circuit are electrically connected to the feedback circuit respectively.

[0014] Preferably, the power amplifier circuit comprises a Boost circuit and a Buck circuit electrically connected together, and the Boost circuit is connected to the output end of the rectifier circuit.

[0015] Preferably, the high-gain micro-signal amplification circuit comprises a buffer circuit, a fixed-gain operational amplifier, a low-pass filter and a controllable-gain operational amplifier which are electrically connected in sequence.

[0016] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0017] In the present invention, the energy storage vehicle power quick connection device is used to realize electrical connection between the energy storage vehicle and external electrical equipment by plugging and unplugging without power failure. The energy storage vehicle power quick connection device is designed with a first guide block, a second guide block and a third guide groove to play a triple positioning guide role, so that construction personnel can quickly realize correct assembly without requiring construction personnel to have a high level of technology. The temperature sensor is used to measure the temperature inside the energy storage vehicle power quick connection device, thereby avoiding the problem of equipment operation failure caused by excessive working temperature. The contact pressure sensor is used to detect whether the plugging and unplugging force is in place inside the energy storage vehicle power quick connection device, thereby avoiding the problem of poor contact and substandard connection tightness. Therefore, the energy storage vehicle power quick connection device has the advantages of uninterrupted power connection, fast plugging and unplugging, reliable connection, sensitive detection and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a partial enlarged structural schematic diagram of the "A" of the present invention;

[0020] Figure 3 It is a cross-sectional structural schematic diagram of the present invention;

[0021] Figure 4 is a schematic diagram of a partial cross-sectional structure of an elastic blade of the present invention;

[0022] Figure 5 It is a schematic diagram of the circuit framework of the detection system of the present invention;

[0023] Figure 6 It is a circuit framework schematic diagram of a low-voltage electronic synchronous voltage mutual inductance circuit of the present invention;

[0024] Figure 7 It is a circuit framework schematic diagram of the high-gain miniature signal amplifier circuit of the present invention;

[0025] Figure 8 is an electronic circuit schematic diagram of a power amplifier circuit of the present invention;

[0026] In the figure: 1-first connecting cylinder, 2-second connecting cylinder, 3-third connecting cylinder, 11-first guide block, 21-second guide block, 31-elastic blade, 32-guide cylinder, 33-second sleeve, 34-first sleeve, 341-third guide groove, 4-fixing ring, 5-elastic buckle, 6-insulating front sleeve, 7-insulating rear sleeve, 71-shaft shoulder, 81-low-voltage electronic synchronous voltage mutual inductance circuit, 82-high-gain miniature signal amplification circuit, 83-low-power microprocessor, 84-wireless baseband chip, 85- RF antenna, 86-temperature sensor, 87-touch sensor, 811-miniature current mutual inductance coil, 812-current-voltage conversion amplifier circuit, 813-integral circuit, 814-phase correction circuit, 815-rectifier circuit, 816-power amplifier circuit, 817-feedback circuit, 8161-Boost circuit, 8162-Buck circuit, 821-buffer circuit, 822-fixed gain operational amplifier, 823-low-pass filter, 824-controllable gain operational amplifier. DETAILED DESCRIPTION

[0027] To facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 8 As shown, a quick connection device for a power supply of an energy storage vehicle includes a first connection cylinder, a second connection cylinder and a third connection cylinder. The tube diameter of the first connection cylinder is larger than the tube diameter of the second connection cylinder and larger than the tube diameter of the third connection cylinder. The first connection cylinder, the second connection cylinder and the third connection cylinder are arranged together in sequence from the outside to the inside. The second connection cylinder is sleeved on the first connection cylinder, and the third connection cylinder is sleeved on the second connection cylinder. The axis centers of the first connection cylinder, the second connection cylinder and the third connection cylinder coincide with each other. A first guide block is fixedly provided on the inner side wall of the first connection cylinder, a second guide block is fixedly provided on the outer side wall of the second connection cylinder, a third guide groove is opened on the outer side wall of the third connection cylinder, a temperature sensor is provided on the first guide block, and a contact pressure sensor is provided on the second guide block.

[0029] Specifically, the contact pressure sensor is arranged at the outer end of the second guide block and adopts contact sensing with a measuring range of 0-0.1MPa. It is used to sense the tightness of assembly during electrical connection. In actual use, when the energy storage vehicle and external electrical equipment are electrically connected together, the contact pressure sensor can convert the mechanical pressure into a current signal at the milliampere level, and then send the current signal to a low-power microprocessor through conduction.

[0030] Specifically, there are three first guide blocks, which are evenly arranged on the inner wall of the first connecting tube. There are also three second guide blocks, which are made of silicone and evenly arranged on the outer wall of the second connecting tube, which helps the energy storage vehicle and external electrical equipment to achieve a blind plug-in effect during the electrical connection process. There are also three third guide grooves, which are evenly arranged on the circumference of the third connecting tube. Since the energy storage vehicle power quick connection device works in a high current working environment, the third guide groove plays the role of a capacitor to a certain extent, thereby avoiding the problem of electric field leakage.

[0031] In the present invention, the energy storage vehicle power quick connection device is used to realize electrical connection between the energy storage vehicle and external electrical equipment by plugging and unplugging without power failure. The energy storage vehicle power quick connection device is designed with a first guide block, a second guide block and a third guide groove to play a triple positioning guide role, so that construction personnel can quickly realize correct assembly without requiring construction personnel to have a high level of technology. The temperature sensor is used to measure the temperature inside the energy storage vehicle power quick connection device, thereby avoiding the problem of equipment operation failure caused by excessive working temperature. The contact pressure sensor is used to detect whether the plugging and unplugging force is in place inside the energy storage vehicle power quick connection device, thereby avoiding the problem of poor contact and substandard connection tightness. Therefore, the energy storage vehicle power quick connection device has the advantages of uninterrupted power connection, fast plugging and unplugging, reliable connection, sensitive detection and high safety.

[0032] The first connecting tube is sleeved with a rotatable fixing ring, which plays the role of electric field balance. The fixing ring can rotate around the first connecting tube. The first connecting tube is provided with an elastic buckle, which can be plugged into the fixing ring. In actual use, if the elastic buckle is detached from the fixing ring, the fixing ring can rotate freely around the first connecting tube. If the elastic buckle is plugged into the fixing ring, the fixing ring and the first connecting tube are fixed together.

[0033] The first connecting cylinder is respectively sleeved with an insulating front sleeve and an insulating rear sleeve, a shaft shoulder is formed on the insulating rear sleeve, and the insulating front sleeve and the insulating rear sleeve are respectively arranged at two ends of the fixing ring.

[0034] The third connecting cylinder comprises a guide cylinder, the inner side wall of which is fixedly provided with elastic blades, there are at least two elastic blades, and the two or more elastic blades are evenly arranged in the circumferential direction of the guide cylinder, and the cross section of the elastic blades is wavy.

[0035] The wavy shape refers to a shape that is close to an "S" shape. When the energy storage vehicle power quick connection device realizes electrical connection, the elastic blade undergoes elastic deformation, and the protrusions on both sides of the elastic blade maintain contact with the conductive member under the action of its own elastic force, thereby realizing electrical connection, and the elastic force of the elastic blade itself avoids the problem of poor contact.

[0036] In addition, more than two elastic blades are evenly arranged in the circumferential direction of the guide tube, and the more than two elastic blades are electrically connected together in sequence, each elastic blade constitutes a separate elastic load current bridge, and the more than two elastic blades constitute a parallel structure, thereby greatly reducing the impedance formed by all elastic blades and reducing the temperature rise on the elastic blades.

[0037] The elastic blade is made of glass copper alloy, and the surface of the glass copper alloy is silver-plated. Glass copper alloy is an elastic material with excellent performance among copper alloys, and has a series of excellent physical, chemical and mechanical properties such as high strength, hardness, fatigue strength, small elastic hysteresis, wear resistance, high conductivity, etc., and silver plating on the surface of glass copper alloy helps to further improve the conductivity of the elastic blade. Since the energy storage vehicle power supply quick connection device works in a high current working environment, the elastic blade made of glass copper alloy and the silver-plated surface of the glass copper alloy reduce the temperature rise when a large current passes through and improve the current passing rate.

[0038] In the actual test, the impedance formed by all elastic blades was set to 10μΩ, and a current of more than 600A passed through the energy storage vehicle power quick connection device. After working for ten minutes, the temperature rise of the energy storage vehicle power quick connection device was 20K, which is much smaller than the test results of the prior art. It greatly reduces the temperature rise when working at full load current, improves the stability during long-term work, and reduces energy loss.

[0039] In the prior art, the insulating material and the conductive material are in direct contact, and it is easy to form a gap between the insulating material and the conductive material. When a large current passes through the conductive material, it is easy to generate a large breakdown electric field radiation and local discharge problems. After a long period of work, it is easy to break down the insulating material, thereby causing electric field leakage, which brings a large safety hazard. For this reason, in the present invention, the third connecting tube also includes a first sleeve and a second sleeve. The first sleeve, the second sleeve and the guide sleeve are arranged together from the outside to the inside in sequence. The first sleeve is made of insulating material, and the second sleeve is made of semiconductor material. The insulating material is a carborundum silicone material. A second sleeve is arranged between the first sleeve and the guide sleeve. The guide sleeve is made of conductive material. The second sleeve made of semiconductor avoids direct contact between the first sleeve made of insulating material and the guide sleeve made of conductive material. The semiconductor material is a polyacrylonitrile organic compound, which has the effect of increasing electric field protection and reducing local discharge, and avoids the problem of breaking down the first sleeve made of insulating material.

[0040] Since the electrical connection structure between the energy storage vehicle and the external electrical equipment in the prior art lacks a structure capable of detecting temperature in real time, the energy storage vehicle power quick connection device also includes a detection system, which includes a low-voltage electronic synchronous voltage mutual inductance circuit, a high-gain micro-signal amplification circuit, a low-power microprocessor, a wireless baseband chip and an RF antenna, a temperature sensor and a contact pressure sensor are respectively electrically connected to the high-gain micro-signal amplification circuit, the high-gain micro-signal amplification circuit is electrically connected to the low-power microprocessor, the low-power microprocessor is electrically connected to the wireless baseband chip, the wireless baseband chip is electrically connected to the RF antenna, and the high-gain micro-signal amplification circuit, the low-power microprocessor and the wireless baseband chip are also electrically connected to the low-voltage electronic synchronous voltage mutual inductance circuit.

[0041] Since the high-voltage side is not synchronized and there is a large difference between the phases, the high-voltage side voltage cannot be detected in real time. Therefore, a low-voltage electronic synchronous voltage mutual inductance circuit is designed. The low-voltage electronic synchronous voltage mutual inductance circuit includes a micro current mutual inductance coil, a current-voltage conversion amplifier circuit, an integration circuit, a phase correction circuit, a rectification circuit, a power amplifier circuit, and a feedback circuit. The micro current mutual inductance coil, the current-voltage conversion amplifier circuit, the integration circuit, the phase correction circuit, the rectification circuit, and the power amplifier circuit are electrically connected together in sequence, and the output end of the rectification circuit, the phase correction circuit, and the integration circuit are electrically connected to the feedback circuit respectively.

[0042] The micro current mutual inductance coil can be sleeved on the first connecting tube. If a large current passes through the energy storage vehicle power supply quick connection device, the micro current mutual inductance coil can sense the magnetic field-electric field conversion occurring on the energy storage vehicle power supply quick connection device, thereby generating a low-voltage side current on the micro current mutual inductance coil, and the low-voltage side current then flows to the current-voltage conversion amplifier circuit, and the current-voltage conversion amplifier circuit is used to amplify the current and voltage of the low-voltage side current. The amplified low-voltage side current then flows to the integration circuit, and the integration circuit is used to perform waveform conversion, offset voltage elimination and integral compensation in feedback control on the amplified low-voltage side current. The current processed by the integration circuit then flows to the phase correction circuit, and the phase correction circuit is used for the deviation of the current phase. The corrected current flows to the rectifier circuit, and the rectifier circuit is used to convert alternating current into direct current. When the low-voltage side current passes through the current-voltage conversion amplifier circuit, the integration circuit, the phase calibration circuit and the rectifier circuit, the feedback circuit can ensure that the large current and the low-voltage side current passing through the energy storage vehicle power supply quick connection device are synchronized in phase and frequency.

[0043] Since the current output by the rectifier circuit is still too small to divide the current to various electrical components, a power amplifier circuit is designed to amplify the current again. The power amplifier circuit includes a Boost circuit and a Buck circuit electrically connected together. The Boost circuit is connected to the output end of the rectifier circuit. The Boost circuit is used to boost the input voltage, while the Buck circuit is used to boost the input current and divide the voltage to various electrical components, thereby meeting the power requirements of multiple electrical components.

[0044] like Figure 8 As shown, the left side U in To output voltage U o The circuit between is a Boost circuit, and its basic principle is: the input micro voltage U in Under the control of the two-stage active switches S1 and S2, according to the actual input voltage U0 threshold requirement of the Buck voltage divider circuit, the active switches S1 and S2 are flexibly selected at the diode D c1 , D c2 With the cooperation of inductors L1 and L2, it has multiple working modes. Here we set the Boost working mode as active switches S1 and D2 turned on, diode D 01 , D 02 , D c1 , D c2 All are turned off. Capacitor voltage U c1 is the output voltage U0, the capacitor voltage U c2 The inductor current i2 remains unchanged, and its value is slightly about I1. At t0, the active switch S1 is turned off, and the diode D 01 , D c1 Since the capacitor C s1 , C c1 , C c2 The existence of voltage U ds1 Starting from zero, it gradually rises, so S1 is approximately turned off at zero voltage. 01 , D c1 It approximately achieves zero voltage conduction. At time t1, U c1 Drop to zero, U ds1 , U c2 In order to rise to U0, the above method is used to ensure that U0 always remains in a stable voltage state.

[0045] Right U o To V o It is a Buck circuit using a full-bridge module. Its basic working principle is: when Q b When turned off, the inductor current I Lf Through the diode D b , at this time the average inductor current can be expressed as:

[0046]

[0047] In the above formula (1): I o is the output current, d2 is Q b The working cycle, at this time L f The average voltage across the inductor is:

[0048]

[0049]

[0050] In the above formula (2), d1 is the diode D 01 , D 02 , D c1 , D c2 The working cycle of the full-bridge unit is constructed. In the stable state, at each Q b When switching, L f The secondary voltage is close to zero, that is, L f The average voltage across both ends is equal, so we can conclude that:

[0051]

[0052] Combining equations (1)-(3), we get the output voltage:

[0053]

[0054] According to formula (4), the full bridge period d1 and Q b The duty cycle d2 adjusts the output voltage V o The value of .

[0055] The temperature sensor adopts a high-precision thermopile infrared non-contact sensor, which can absorb tiny heat energy and generate an output signal. The output signal is generally a mA-level micro signal. The contact pressure sensor adopts a high-precision micro sensor, and the output signal is generally also a mA-level micro signal, and the anti-interference ability is very low. To this end, the high-gain micro signal amplifier circuit includes a buffer circuit, a fixed gain operational amplifier, a low-pass filter, and a controllable gain operational amplifier that are electrically connected together in sequence, and the temperature sensor is electrically connected to the buffer circuit. When the output signal flows to the buffer circuit, the buffer circuit is a protection circuit of the high-gain micro signal amplifier circuit, which is used to suppress the current rise rate. A fixed gain operational amplifier is provided after the buffer circuit, and the fixed gain operational amplifier is used to amplify the micro output signal to a voltage range suitable for the processing of the subsequent circuit. The output signal amplified by the fixed gain operational amplifier flows to the low-pass filter, and the low-pass filter adopts a bandwidth of 5MHz and 10MHz, which is used to filter the output signal to improve the smooth form of the signal. The output signal after filtering flows to the controllable gain operational amplifier, the model of which is VC810, to achieve a dynamic gain change of 80dB, and finally the analog signal is input to the analog input pin of the low-power microprocessor for real-time sampling. The high-gain and low-noise miniature small signal amplifier circuit proposed by the present invention can achieve a maximum voltage gain of 80dB, and the minimum effective value of the input voltage can reach 10mV. When the gain is 60dB, the peak-to-peak value of the output noise voltage is less than 300mV, and the 3dB passband is optional from 0 to 5 / 10MHz. The gain fluctuation within the passband is less than 1dB, which fully meets the needs of high-precision and miniaturized temperature sensors and contact pressure sensors.

[0056] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A quick connection device for a power supply of an energy storage vehicle, characterized in that: The invention comprises a first connecting tube, a second connecting tube and a third connecting tube which are fixedly arranged together from the outside to the inside in sequence, wherein the axis centers of the first connecting tube, the second connecting tube and the third connecting tube coincide with each other, a first guide block is fixedly arranged on the inner side wall of the first connecting tube, a second guide block is fixedly arranged on the outer side wall of the second connecting tube, a third guide groove is provided on the outer side wall of the third connecting tube, a temperature sensor is arranged on the first guide block, and a contact pressure sensor is arranged on the second guide block; It also includes a detection system, which includes a low-voltage electronic synchronous voltage mutual inductance circuit, a high-gain micro-signal amplification circuit, a low-power microprocessor, a wireless baseband chip and an RF antenna. The temperature sensor and the contact pressure sensor are respectively electrically connected to the high-gain micro-signal amplification circuit, the high-gain micro-signal amplification circuit is electrically connected to the low-power microprocessor, the low-power microprocessor is electrically connected to the wireless baseband chip, the wireless baseband chip is electrically connected to the RF antenna, and the high-gain micro-signal amplification circuit, the low-power microprocessor and the wireless baseband chip are also respectively electrically connected to the low-voltage electronic synchronous voltage mutual inductance circuit.

2. A quick connection device for a power supply of an energy storage vehicle according to claim 1, characterized in that: A rotatable fixing ring is sleeved on the first connecting tube, and a buckle is arranged on the first connecting tube, and the buckle can be plugged into the fixing ring.

3. A quick connection device for a power supply of an energy storage vehicle according to claim 2, characterized in that: The first connecting cylinder is respectively sleeved with an insulating front sleeve and an insulating rear sleeve, a shaft shoulder is formed on the insulating rear sleeve, and the insulating front sleeve and the insulating rear sleeve are respectively arranged at two ends of the fixing ring.

4. The energy storage vehicle power quick connection device according to claim 1, characterized in that: The third connecting cylinder comprises a guide cylinder, and an elastic blade is arranged on the inner side wall of the guide cylinder. There are at least two elastic blades, and more than two elastic contact pieces are evenly arranged on the inner side wall of the guide cylinder. The cross section of the elastic blade is wavy.

5. A quick connection device for a power supply of an energy storage vehicle according to claim 4, characterized in that: The elastic blades are made of glassy copper alloy, and the surface of the glassy copper alloy is silver-plated.

6. A quick connection device for a power supply of an energy storage vehicle according to claim 4 or 5, characterized in that: The third connecting tube also includes a first sleeve and a second sleeve. The first sleeve, the second sleeve and the guide sleeve are arranged together in sequence from the outside to the inside. The first sleeve is made of insulating material, and the second sleeve is made of semiconductor. The insulating material is carbonized silicone material.

7. The energy storage vehicle power quick connection device according to claim 1, characterized in that: The low-voltage electronic synchronous voltage mutual inductance circuit includes a miniature current mutual inductance coil, a current-voltage conversion amplifier circuit, an integration circuit, a phase correction circuit, a rectification circuit, a power amplifier circuit and a feedback circuit. The miniature current mutual inductance coil, the current-voltage conversion amplifier circuit, the integration circuit, the phase correction circuit, the rectification circuit and the power amplifier circuit are electrically connected together in sequence, and the output end of the rectification circuit, the phase correction circuit and the integration circuit are electrically connected to the feedback circuit respectively.

8. The energy storage vehicle power quick connection device according to claim 7, characterized in that: The power amplifier circuit comprises a Boost circuit and a Buck circuit which are electrically connected together, and the Boost circuit is connected to the output end of the rectifier circuit.

9. A quick connection device for a power supply of an energy storage vehicle according to claim 7 or 8, characterized in that: The high-gain micro-signal amplification circuit comprises a buffer circuit, a fixed-gain operational amplifier, a low-pass filter and a controllable-gain operational amplifier which are electrically connected in sequence.

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