515 results about "Electronic load" patented technology

The invention discloses a control circuit of an electronic load, the electronic load and a power supply test system. The circuit comprises an MCU; the signal output end of the MCU is connected with the input end of the DAC module; the closed-loop control circuit comprises a first error amplifier, a mutual inductor, an MOS (Metal Oxide Semiconductor) tube, a current sampling resistor and a power supply end VBUS; a mutual inductor is arranged between a first error amplifier and an MOS tube of the closed-loop control circuit, a power supply end VBUS is connected with a drain electrode of the MOS tube through a primary side of the mutual inductor, a first secondary side of the mutual inductor feeds back an input signal of the first error amplifier, and a second secondary side of the mutual inductor feeds back a driving signal of the first error amplifier to the MOS tube. According to the invention, the dynamic response speed when the electronic load pulls the high-frequency current can be improved, and the test requirements of high precision and high dynamic response are met.

The invention relates to the technical field of power electronic equipment testing, and discloses a special intelligent testing device and method for a power UPS, and the device comprises a multi-source power supply system which comprises a three-phase program-controlled variable-frequency power supply, a single-phase program-controlled variable-frequency power supply and a DC program-controlled power supply, the output voltage of the three-phase program-controlled variable-frequency power supply is 0-480V and is adjustable, and the output voltage of the single-phase program-controlled variable-frequency power supply is 0-480V; the output voltage of the single-phase programmable variable-frequency power supply is 0-280V and the frequency of the single-phase programmable variable-frequency power supply is 45-64Hz and adjustable; the output voltage of the direct-current programmable power supply is 50-1000V and adjustable; an electronic load system; a signal acquisition system; an embedded control system; and an upper computer software system. A three-phase program-controlled variable-frequency power supply, a single-phase program-controlled variable-frequency power supply and a direct-current program-controlled power supply are integrated to form a multi-source power supply system, a resistive and rectifying dual-mode electronic load is combined, millisecond-level synchronous switching of a voltage level and a load state is realized through an embedded control system, a closed-loop test capability of multi-dimensional performance of the power UPS is formed, and the test efficiency is improved.

The invention discloses an electronic load system, a power supply test method, an electronic device and a storage medium, and relates to the technical field of electrics. A main control circuit can provide a reference voltage for a current sampling and control circuit, and can also obtain load current setting parameters; the current sampling and control circuit determines a control voltage mainly by acquiring a sampling voltage and comparing the sampling voltage with a reference voltage so as to control an on-resistor in the power circuit through the control voltage and further control the magnitude of the current passing through the on-resistor, and meanwhile, the change rate of the current can be controlled due to a load current parameter. Therefore, the rapid change of the load current can be realized. Therefore, the technical problems of how to realize the rapid change of the current and improve the accuracy of the test result can be solved, and the technical effects of meeting the rapid change requirement of the current and improving the test result are achieved.

The invention relates to a full-automatic test system and method compatible with multi-type component irradiation tests, and the system comprises an irradiation main control board, an irradiation test board and an irradiation load board which are disposed in an irradiation room and are connected through a cable, and an electronic load, a programmable power supply, an upper computer and a digital oscilloscope which are disposed in a test preparation room. The system can compatibly support the irradiation test of the total dose effect and the single event effect, is suitable for the rapid assessment demand of multiple types of COTS components on a large scale, and can meet the urgent demand of the commercial spaceflight field for the evaluation of the radiation resistance of the COTS components.

The invention provides an electronic load circuit fault diagnosis method based on a multi-channel graph attention network. Each vibration sensor signal is averagely segmented into a plurality of time slices, frequency domain information of each slice signal is used as a graph node, edge connection is carried out according to feature similarity weight coefficients between the graph nodes, each vibration sensor signal forms a sub-graph, and thus a multi-sub-graph structure is established; performing information aggregation updating on each sub-graph node by adopting a graph attention mechanism network; splicing and fusing the updated slice nodes at the same time from different sub-graphs by adopting an end-to-end connection mode to form a fusion graph, and training edge connection weights among the nodes of the fusion graph by adopting an edge weight learning mechanism and a multi-channel attention mechanism; and inputting the attention mechanism aggregation characteristics of the fusion image into a meta-learning model to carry out electronic load circuit abnormity diagnosis. According to the fault diagnosis method based on the multi-channel graph attention network, fault detection on components in an electronic load circuit is realized.

The invention belongs to the related technical field of fuel cells, and particularly relates to a fuel cell impedance spectroscopy rapid measurement system and method, the system is divided into an excitation current injection part, a data acquisition part and an upper computer, the upper computer adopts a DIBS signal with an excellent peak value inhibition capability and a flexible amplitude-frequency design capability as test excitation, and the test excitation part is connected with the data acquisition part; an electronic load is used as an excitation source. The upper computer can control the electronic load to generate a current excitation waveform used for impedance testing based on a DIBS signal, the electronic load injects excitation current into output current of a tested galvanic pile, the upper computer can also read sampling data of the data acquisition part, fast Fourier transform is carried out on the acquired excitation current and response voltage data, and the impedance of the tested galvanic pile is tested. And obtaining an electrochemical impedance spectrum. According to the method, the impedance measurement efficiency is improved, the hardware structure is simple, the method has a good field application prospect, a measured object can be expanded to other electrochemical systems including an electrolytic tank, and the method has good expansibility.

The invention discloses a multi-mode perovskite and laminated cell comprehensive test system and method. The system comprises a darkroom, a test platform, an LED light source module, a CCD camera, a laser, an adjustable constant current source, an electronic load and an upper computer. The darkroom is used for shielding external ambient light and providing a dark test environment; the test platform is installed in the darkroom, and a to-be-tested battery is placed on the test platform; the LED light source module is used for providing a test light source; the CCD camera is used for capturing an optical signal generated by the battery to be tested in the testing process; the laser is used for emitting a laser beam to excite the to-be-detected battery to generate a specific optical response; the adjustable constant current source and the electronic load module can be electrically connected with a to-be-tested battery on the test platform, the adjustable constant current source is used for supplying current to the to-be-tested battery, and the electronic load module is used for simulating different load conditions; and the upper computer is used for realizing intelligent control of the test process and processing and display of test data.

The invention discloses a fast charging protocol control device compatible with multiple fast charging protocols, and the device is characterized in that a Type-C controller is connected with a tested fast charging power supply and a main DSP controller, and achieves the control modes of PD2.0 and PD3.0 fast charging protocols of the tested fast charging power supply; the ADC1 and the ADC2 are respectively connected with the tested fast charging power supply and the main DSP controller, the main DSP controller is connected with the electronic load, and a control mode of ID identification of the tested fast charging power supply is realized; the DAC1 and the DAC2 are respectively connected with the tested fast charging power supply and the main DSP controller, the main DSP controller is connected with the electronic load, and the control mode of QC2.0 and QC3.0 fast charging protocols of the tested fast charging power supply is realized; and the Timer is connected with the main DSP controller and the tested fast charging power supply to realize a control mode of AFC, FCP and SCP fast charging protocols of the tested fast charging power supply.

The invention discloses a POL power supply automatic test method based on modular design, and belongs to the technical field of power supply test. The method comprises the following steps: firstly, under the control of an upper computer, automatically reading POL power supply basic parameters including key characteristic parameters such as input / output voltage, rated current and frequency from a preset Excel table, and establishing a judgment reference for testing; then, instrument initialization is completed, communication connection with test equipment such as an oscilloscope, an electronic load and a direct-current power supply is established, and configuration of initialization function parameters is completed; then, executing a measurement task of each core parameter of the POL power supply to be tested, and in the test process, executing a parallel measurement management mechanism, namely configuring each instrument parameter and channel state in real time according to a specific test item, and triggering a retry or interrupt logic under the conditions of communication abnormality, data timeout and the like until the test recovers a running state; and finally, after the test is completed, performing Excel storage and interaction on the standardized test data and the waveform screenshot, and finally safely exiting. According to the POL power supply automatic test method based on the modular design, the whole test process is divided into a plurality of serial or parallel function processing units such as parameter reading, instrument initialization, test execution and test management, data storage and interaction and the like, and high efficiency and usability of a test system are achieved.

A DC electronic load circuit relates to the technical field of electronic load control. The utility model provides a direct current electronic load circuit which integrates a dissipation MOS tube array, an analog PID loop, a digital integrated control module, a bus electrical parameter sampling and processing module and a WiFi communication module, and realizes a plurality of working modes such as constant current, constant voltage, constant resistance and constant power by accurately controlling the conduction degree of the MOS tube array. The system has the advantages of real-time monitoring, remote control, overvoltage and overcurrent protection, low power consumption design and the like, and an electronic load solution which is high in precision, high in stability and flexible to operate is provided, so that diversified test requirements are met, and the power supply test efficiency and safety are improved.

The invention provides an electronic load dynamic slope control circuit and method, and relates to the technical field of integrated circuit design. The reference generation circuit receives and stores different current reference values and provides basic data support for the system. The slope generation circuit accurately adjusts and controls the current according to a set slope, cooperates with the comparison / selection circuit, provides an accurate current control basis for the MOS control circuit according to a working mode determined by a pulse width modulation signal generated by the PWM generation circuit, and further accurately controls the actual current. The waveform parameter of the pulse width modulation signal is adjusted by the programmable characteristic of the PWM generation circuit, and the time point and duration of current loading are controlled. Meanwhile, by introducing a time sequence control mechanism, when current values are switched in different working modes, accurate control over the slope is achieved, the defect that the current is unstable due to the fact that effective time sequence coordination is lacked when the current set value is frequently and rapidly changed in the prior art is overcome, and the safety and reliability of current control are improved.

The invention relates to the technical field of electronic measurement, in particular to a multifunctional comprehensive test method and system for a direct-current power supply, and the method comprises the steps: initializing a test; a static performance test step; a dynamic performance test step: driving a direct-current electronic load module to execute a time sequence instruction sequence in the dynamic load test file, and acquiring an output voltage and an output current waveform through a high-speed data acquisition module in the execution process; a ripple noise test step: switching the high-speed data acquisition module to an alternating current coupling mode and acquiring a high-frequency noise waveform in a constant load current section in the time sequence instruction sequence; a correlation analysis step; and a test termination step: controlling the load to return to zero and closing the tested DC power supply. Through automatic configuration and test execution of the system, the complexity of manual operation is reduced, and the test efficiency is improved. And especially in a high-frequency test scene, the test time is remarkably saved through automatic execution.

The invention discloses a fuse test method and device and a readable medium. The method comprises the following steps: outputting a current required by a test through a direct-current power supply module; the electronic load module is matched with the direct-current power supply module to simulate various working condition tests, wherein the working condition tests comprise a fusing time test, a durability test, a pulse test, a current gradient test and a current circulation impact test; man-machine interaction including function setting and data display is carried out through the touch screen module; the operation of each module is controlled through the middle computer module, and an external communication interface connected with an upper computer is provided. By simulating various working conditions, the performance of the fuse under different conditions can be comprehensively evaluated, and the test accuracy and efficiency are improved.

The invention discloses a server power supply board testing method and system, electronic equipment and a storage medium, and relates to the technical field of server power supply board testing, and the method comprises the steps: inputting a testing power supply signal to a server power supply board, and verifying the triggering accuracy of overvoltage protection and undervoltage protection functions of the server power supply board; after a preset power supply signal is converted by a solid-state relay, voltage loading and detection are carried out on a power supply input interface one by one channel, and after it is verified that a power supply protection function and an input interface state are normal, multi-type load fluctuation and communication protocol interaction requirements of a server are dynamically reproduced through a function analog signal. The output stability and protocol compatibility of the server power supply board are evaluated by combining an electronic load dynamic discharge test with a digital signal collaborative feedback mechanism, so that the technical problems of relatively low test efficiency and relatively high test cost of the server power supply board in related technologies are solved, and the purposes of reducing the test cost, improving the test efficiency and improving the test efficiency are achieved. And the test coverage rate is increased.

The invention relates to the field of power supply testing, in particular to a power supply aging test system which comprises a power supply aging test system and a power supply aging test method. The system comprises an industrial control computer, an aging rack, an energy recovery module, an electronic load module and a closed test cabin, the industrial control computer controls aging test parameters and data acquisition, the multi-channel electronic load module is arranged in the aging rack, the energy recovery module converts electric energy into energy which can be stored or fed back to a power grid, and the closed test cabin is integrated with a temperature and humidity control unit. The test method comprises the steps of connecting a to-be-tested power supply to equipment, setting related parameters, starting a test, monitoring data, performing anomaly detection, generating a test report and the like. The technical effects of multi-channel synchronous test, energy recovery, accurate temperature and humidity control, accurate anomaly detection, detailed test report generation, remote monitoring support and the like are achieved.

The present invention provides an automated test system for subway DC protection devices based on an embedded system, including a program-controlled DC power supply, an electronic load, a data acquisition card, a communication module, and a host computer; the program-controlled DC power supply provides a power basis for the entire test system, and the DC voltage and current output by the program-controlled DC power supply act on the DC protection device of the subway under test; the electronic load works in coordination with the program-controlled DC power supply, and according to the test requirements, it dynamically adjusts its own resistance value to change the current drawn from the power supply, thereby simulating the load changes of the subway in different operating periods and different working conditions; the data acquisition card is connected to the program-controlled DC power supply, the electronic load, and the protection device under test at the same time, and the data acquisition card also collects the feedback signal of the protection device under test; the data acquisition card is connected to the host computer through the communication module. The present invention can realize all-round, high-precision and high-efficiency testing of subway DC protection devices, and ensure the safe and stable operation of the subway DC power supply system.

The invention discloses a parallel electronic load current control method and device and electronic equipment. The method comprises the following steps: acquiring a target current value; based on the target current value, controlling the feedback type electronic load to output at a first output current; based on the target current value and the first output current, controlling the consumable electronic load to output with a second output current; under the condition that the output current of the electronic load system is the target current value, the consumption type electronic load is controlled to output with a third output current, so that the output current of the electronic load system is kept at the target current value until the output current of the feedback type electronic load reaches the target current value; and in response to the output ending instruction, controlling the feedback electronic load to output with a fourth output current until the output current of the feedback electronic load returns to the steady-state working current, and controlling the current compensation unit to output a reverse compensation current, so that the output current of the electronic load system is consistent with the current preset output curve.

The invention relates to an automatic power supply test system and method. The automatic power supply test system comprises a programmable AC power supply module, an electrical performance acquisition module, a control module and a plurality of electronic load modules. The power output end of the programmable AC power supply module is connected with the power input end of a to-be-tested DC power supply, and the signal input end of the programmable AC power supply module is connected with the signal output end of the control module. The power output end of the to-be-tested DC power supply is connected with the signal input end of the electrical performance acquisition module, and is dynamically connected with the power input ends of the plurality of electronic load modules. The control module is used for determining a corresponding test mode, and generating a corresponding programmable power supply control signal and a dynamic connection control signal according to the test mode so as to simulate different power supply working conditions and realize load test processes under different load conditions. The testing device can adapt to various power supply and load working conditions, and solves the problems of dispersed functions and bloated structure of the existing testing device.

The automatic test system comprises a primary direct current source, an industrial personal computer, a tested power supply, an electronic load and a universal meter, the tested power supply is the programmable power supply, the primary direct current source is connected with the input end of the tested power supply and used for supplying power to the tested power supply, and the output end of the tested power supply is connected with the electronic load and used for supplying power to the electronic load. The universal meter is connected to the output end of the tested power supply and is used for measuring the output voltage of the tested power supply; the primary direct current source, the tested power supply, the electronic load and the universal meter are respectively connected with the industrial personal computer, and the industrial personal computer realizes control and data backward reading of the tested power supply, the electronic load, the universal meter and the primary direct current source through a communication interface. Compared with a manual test method, the automatic test system provided by the invention can realize automatic test by controlling the primary source, the electronic load, the programmable power supply and the universal meter only by setting up a test environment by a tester, so that the test efficiency is improved, and the labor cost is reduced at the same time.

The invention discloses an automatic test system of a power driving chip, and particularly relates to the technical field of automatic test, which comprises a dynamic test control module, a multi-level parallel test module, an abnormal power detection module and a safety verification diagnosis module. Based on cooperative work of a programmable electronic load and a digital signal processor, the dynamic response capability of a chip under different working conditions is verified, abnormal power data under an extreme load condition is generated, electrical parameters and thermal parameters of the chip are synchronously collected, the relevance between abnormal power performance and temperature is analyzed, and the abnormal power performance is analyzed. Temperature rise differences caused by power-off protection and electric leakage are distinguished, abnormal power waveforms are extracted and classified so as to distinguish power-off protection and electric leakage events, the influence degree of environmental charge interference is quantified, finally, response effectiveness of a chip protection circuit in a strong charge environment caused by electric leakage is simulated, and calibration is performed according to a collected correction value. Therefore, the automation degree of the system is improved, and the test robustness is enhanced.

The utility model discloses an intelligent charging and discharging system, and belongs to the technical field of charging and discharging. Comprising a main control module, the system comprises a temperature sensor module, a heat dissipation assembly, a first charging and discharging management module, a second charging and discharging management module, a third charging and discharging management module, an auxiliary power supply monitoring module, a touch screen module, a switch assembly, a data storage module, an external communication interface module, a fourth charging and discharging management module, an auxiliary power supply module and an external power supply module. A first constant-current constant-voltage output module, a second constant-current constant-voltage output module, a portable charger and an electronic load module; the storage battery can be charged and discharged, the charging and discharging working conditions of the storage battery can be automatically monitored, online monitoring maintenance and data recording, storage and transmission of charging and discharging of the storage battery can be achieved, and the single storage battery can be monitored. The anti-reverse connection charging control circuit can prevent the battery from being damaged by reverse connection, protect equipment from being damaged, and prevent safety accidents caused by current backflow.

The invention discloses an electrolytic bath performance test system, which comprises an electrolytic bath, an electronic load, a direct current power supply, a first contactor, a second contactor, a third contactor, a fourth contactor, a fifth contactor, a third contactor, a fourth contactor and a fifth contactor, the other end of the first contactor is connected with the cathode of the electrolytic bath, one end of the second contactor and one end of the fifth contactor, the other end of the second contactor and the other end of the fourth contactor are connected with the anode of the electronic load, and the cathode of the electronic load is connected with the other end of the third contactor and the other end of the fifth contactor; the method has the advantages that the acceleration stress test requirement is met, and the power supply interference in the EIS test can be eliminated.

The invention relates to a single-cell test system and method for a multi-channel high-temperature proton exchange membrane fuel cell, and belongs to the field of high-temperature proton exchange membrane fuel cell performance evaluation equipment. The test system comprises a plurality of test channels, the test channels are arranged in parallel, and each test channel comprises a gas supply module, an electronic load module, an electrochemical impedance module, an alarm monitoring module and an integrated control module. According to the single cell test system of the multi-channel high-temperature proton exchange membrane fuel cell, the function of simultaneously carrying out single cell performance test on a plurality of groups of fuel cells under different test conditions can be realized, and the efficiency is improved; the automation degree is high, the functions of automatic gas flow rate switching, automatic load changing, automatic data recording and the like can be achieved, one-key operation is achieved, and manual guarding is not needed.

The invention discloses a detection method, equipment and medium for a new energy high-power direct-current charging pile, and relates to the technical field of charging pile stability detection, and the method comprises the steps: controlling a direct-current electronic load to generate a load disturbance signal at N characteristic working points, collecting instantaneous value change data through a broadband data collection center, and calculating the stability of the charging pile according to the instantaneous value change data; and based on the dynamic load disturbance signal and the instantaneous value change data, calculating the pulse response characteristics of the to-be-tested DC charging pile at the N characteristic working points through a correlation function analysis method, constructing a dynamic impedance characteristic model, and based on the safe working area three-dimensional boundary map, the electric energy quality indexes of the N characteristic working points and the dynamic impedance characteristic model, calculating the dynamic impedance characteristic of the to-be-tested DC charging pile. And evaluating and diagnosing the comprehensive performance of the direct current charging pile to be tested. According to the direct current charging pile comprehensive performance detection method based on dynamic load disturbance, accurate physical examination of the overall performance of the charging pile is achieved, and the detection depth, precision and predictability are improved.

The invention discloses a charger voltage and current automatic calibration method based on multiple communication types, and the method comprises the following steps: connecting a communication signal line of a charger to a corresponding communication level conversion device, and connecting the communication level conversion device to an automatic calibration upper computer through a USB line; a communication line of the electronic load is connected to an automatic calibration upper computer through a USB; the automatic calibration upper computer sends commands to the electronic load and the charger, and the electronic load and the charger respond and start voltage calibration, voltage coefficient calibration, current calibration and current coefficient calibration of the charger. According to the automatic calibration system, the interface and the operation are simple, the automatic calibration method enables the whole voltage and current calibration process of the charger to be automatically carried out, special operation of a specially-assigned person is not needed, the burden of operators is reduced, and the production efficiency of products is improved.

The invention discloses a battery management unit equalization efficiency test method and system, and relates to the technical field of function test, and the method comprises the steps: inputting a time-varying test instruction sequence into an electronic load instrument and a BMS for active equalization, synchronously collecting multi-modal time sequence data in an active equalization process, and constructing a dynamic equalization matrix; inputting the dynamic equilibrium matrix into a time-varying efficiency evaluation model, performing real-time association mapping by a working condition mapping layer, performing feature aggregation by a statistical aggregation layer, and outputting an efficiency distribution thermodynamic diagram; and performing global statistical characteristic analysis and multi-parameter coupling association on the efficiency distribution thermodynamic diagram and the dynamic equilibrium matrix, identifying an efficiency abnormal trend, performing time sequence prediction analysis and root cause analysis on the efficiency abnormal trend, and generating an equilibrium performance evaluation report. According to the method, the time-varying efficiency evaluation model is constructed, and the time-varying test instruction sequence is synchronously generated, so that the visualization and deep insight of the test result are realized, and the authenticity and compositeness of test excitation are improved.

The invention discloses a current slope control method, device and system, electronic equipment and a storage medium, applied to an electronic load system, the electronic load system comprises a first electronic load and a second electronic load which are connected in parallel, the first electronic load and the second electronic load are both connected with a tested power supply, the output current slope of the first electronic load is adjustable, and the output current slope of the second electronic load is adjustable. The output current slope of the second electronic load is non-adjustable. The method comprises the following steps: acquiring a target current slope; controlling a second electronic load to output a first current; acquiring the slope of the first current; determining a compensation current slope based on the target current slope and the slope of the first current; and controlling the first electronic load to output the second current at the compensation current slope, so that the output current slope of the electronic load system reaches the target current slope.

The invention discloses a transformer station DC system storage battery pack on-load discharge capacity checking method and system, and relates to the technical field of storage battery discharge maintenance, and the method comprises the steps: carrying out the equalizing charging of a storage battery pack through an equalizing charging voltage, and collecting the internal resistance of a single storage battery before capacity checking; after capacity checking is started, an intelligent electronic load value is adjusted, so that the output current of the storage battery pack keeps a constant set value; when a test ending condition is met, obtaining nuclear capacity discharge capacity according to the discharge current and the discharge time of the storage battery pack; the storage battery pack is charged after charging is finished, the capacity checking charging capacity is obtained according to the charging current and the charging time, and the internal resistance of the single storage batteries after capacity checking is collected after charging is finished; and generating an on-load discharge capacity checking test table according to the internal resistance of the single storage battery before capacity checking, the capacity checking discharge capacity, the capacity checking charge capacity and the internal resistance of the single storage battery after capacity checking so as to complete capacity checking of the storage battery pack. Remote online capacity checking is realized, and the problem of low reliability of the whole group of storage batteries caused by virtual connection of storage battery connecting strips or performance reduction of a single storage battery is solved.

The invention provides an electronic load grid voltage adjusting method based on an improved DQN algorithm, and the method comprises the steps: employing a DQN reinforcement learning architecture, collecting the high-frequency waveform data of the load pulling current of an electronic load, obtaining an instantaneous amplitude signal, an instantaneous phase signal and an instantaneous frequency signal through Hilbert transformation, and enabling the instantaneous amplitude signal, the instantaneous phase signal and the instantaneous frequency signal to serve as an environment state st; the environment state st is input into a multi-mode DeepSeek distillation model intelligent agent, and the intelligent agent outputs an electronic load MOS tube grid voltage regulating variable delta Pt as an action at; establishing a reward function rt with optimal control performance as a target; the intelligent agent executes the action at in the environment state st to obtain a new environment state st + 1, and (st, at, rt, st + 1) is stored in an experience playback buffer pool; and the network parameters are replayed, optimized and updated by adopting priority experience, so that the accurate control of the load pulling current of the electronic load is realized.

The present invention relates to a detection circuit for an energy storage battery impedance spectrum and a control method thereof, and belongs to the field of battery detection technology. The circuit includes a floating detection circuit, a microprocessor control system, a programmable electronic load, a high-precision voltage sensor, a high-precision current sensor, a charge and discharge switch, a charging power supply, and a discharge load; before applying excitation, the circuit uses a balancing capacitor as a medium, and controls the charge and discharge switch so that the balancing capacitor voltage offsets the DC voltage of the energy storage battery, thereby improving the detection accuracy of small changes in the power battery terminal voltage; in the impedance spectrum detection stage, by controlling the current flowing through the programmable electronic load, the decoupling problem of the energy storage battery charge and discharge current and the excitation current is solved; by the frequency sweeping operation of the composite excitation signal, the rapid online detection of the internal impedance spectrum of the energy storage battery is realized. The present invention can accurately detect the dynamic and static internal impedance spectra of the energy storage battery, and provide data support for the health status assessment of the energy storage battery.