Testing device and testing method of energy storage converter

Abstract

The invention discloses a testing device and method for an energy storage converter, and the energy storage converter comprises a first energy storage converter body and a second energy storage converter body, and the first energy storage converter body is electrically connected with the second energy storage converter body. The testing device comprises a power grid, a charging and discharging testing unit, an off-grid testing unit, a fan testing unit, a communication testing unit and an industrial personal computer, wherein the industrial personal computer is in electric signal connection with the power grid, the charging and discharging testing unit, the off-grid testing unit, the fan testing unit and the communication testing unit. When the first energy storage converter body is in a charging state, direct current is converted into alternating current to be fed back to a power grid; when the first energy storage converter body is in a discharging state, the second energy storage converter body converts alternating current input by a power grid into direct current and supplies the direct current to the first energy storage converter body, electric energy is recycled, and a multi-dimensional data collection scheme is summarized through a plurality of units. And the defect of single data acquisition of the existing testing device is overcome.

Description

Technical Field

[0001] This invention relates to the technical field of testing energy storage converters, and more particularly to a testing device and method for energy storage converters. Background Technology

[0002] With the advancement of the new energy strategy, energy storage products are being used more and more widely in power systems. As the core component of energy storage equipment, the charging efficiency, discharging performance, off-grid operation stability, fan cooling capacity, and communication reliability of the PCS directly determine the overall performance of the energy storage equipment. Therefore, comprehensive performance testing of the PCS is a crucial step in the production and acceptance of energy storage products.

[0003] There are some shortcomings in the testing technology for some high-power energy storage converters. For example, the power loss is large during the testing process. Traditional testing uses independent loads to consume power without realizing power recovery and utilization. In addition, there is a lack of integrated remote control and multi-dimensional data acquisition solutions, resulting in a low degree of automation in the entire testing process. Summary of the Invention

[0004] To overcome the shortcomings of existing technical solutions, embodiments of the present invention provide a testing device and testing method for energy storage converters.

[0005] The technical solution adopted by this invention to solve its technical problem is: In a first aspect, the present invention provides a testing apparatus for an energy storage converter, the energy storage converter including a cooling fan, a first energy storage converter body, and a second energy storage converter body, the cooling fan being disposed on the first energy storage converter body, the first energy storage converter body being electrically connected to the second energy storage converter body, and the testing apparatus comprising: The power grid is electrically connected to the first energy storage converter body and the second energy storage converter body; when the first energy storage converter body is in charging mode, it converts DC power into AC power and inputs it into the power grid; when the first energy storage converter body is in discharging mode, the second energy storage converter body converts the AC power input from the power grid into DC power and inputs it into the first energy storage converter body. The charging and discharging test unit includes a multimeter and a Hall sensor. The Hall sensor is connected to the DC circuit electrical signal of the first energy storage converter body, and the multimeter is connected to the AC output terminal electrical signal of the first energy storage converter body. Off-grid testing unit, wherein the off-grid testing unit is electrically connected to the AC output terminal of the first energy storage converter body; A fan testing unit includes two wind speed sensors, one of which is located in the air intake direction of the cooling fan, and the other is located in the air outlet direction of the cooling fan. A communication test unit is electrically connected to the first energy storage converter body and the second energy storage converter body. An industrial control computer is electrically connected to the power grid, the charge / discharge test unit, the off-grid test unit, the fan test unit, and the communication test unit.

[0006] Secondly, the present invention also provides a testing method for an energy storage converter, the testing method being applied to the testing apparatus for the energy storage converter described in any of the above claims, the testing method comprising: The first energy storage converter body is controlled to enter the charging mode, and the multimeter and the Hall sensor are controlled to collect the first performance index of the first energy storage converter body in the charging mode. The first energy storage converter body is controlled to enter the discharge mode, and the multimeter and the Hall sensor are controlled to collect the second performance index of the first energy storage converter body in the discharge mode. The off-grid test unit is controlled to interrupt the electrical connection between the power grid and the first energy storage converter body, and to detect the third performance index of the first energy storage converter body in off-grid mode. The wind speed sensors are controlled to detect the fourth performance index of the cooling fan during operation. The communication test unit is connected to the first energy storage converter body via electrical signals, and the fifth performance index of the first energy storage converter body is detected when receiving or sending data. The first performance index, the second performance index, the third performance index, the fourth performance index, and the fifth performance index are all uploaded to the industrial control computer.

[0007] Compared with the prior art, the beneficial effects of the present invention are: When the first energy storage converter (under test) is in charging mode, it can convert DC power into AC power to feed back to the grid. Conversely, when the first energy storage converter is in discharging mode, the second energy storage converter converts the AC power input from the grid into DC power and supplies it to the first energy storage converter. This allows for the recovery and utilization of electrical energy, thereby avoiding the power loss problem caused by the independent load consuming electrical energy in traditional testing devices. The charging and discharging test unit collects electrical signal data from the DC and AC sides in real time, the off-grid test unit monitors the AC output performance, the fan test unit evaluates the efficiency of the cooling fan through each dual wind speed sensor, the communication test unit detects the communication performance of the first energy storage converter, and the industrial control computer summarizes the multi-source data to form a multi-dimensional data acquisition scheme covering electrical performance, heat dissipation efficiency, and communication functions, thus making up for the shortcomings of traditional devices in terms of single data acquisition.

[0008] This invention effectively solves the shortcomings of existing energy storage converter testing devices, such as high power loss, lack of power recovery and utilization, and low degree of automation, thereby improving testing efficiency and accuracy. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic block diagram of a test device for an energy storage converter according to an embodiment of the present invention.

[0011] Figure 2 This is a flowchart of a testing method for an energy storage converter according to an embodiment of the present invention.

[0012] Numbers in the diagram 1. Energy storage converter; 11. First energy storage converter body; 12. Second energy storage converter body; 13. Cooling fan; 2. Power grid; 3. Charge / discharge test unit; 4. Offline testing unit; 5. Fan testing unit; 6. Communication test unit; 7. Industrial control computer; 8. Circuit breaker; 9. Isolation transformer; 10. AC contactor. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0015] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0016] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0017] To address the shortcomings of existing testing technologies for high-power energy storage converters, such as high power loss during testing, the use of independent loads in traditional testing without energy recovery, and the lack of integrated remote control and multi-dimensional data acquisition solutions, resulting in low automation of the entire testing process.

[0018] The energy storage converter 1 in this embodiment of the invention specifically includes a cooling fan 13, a first energy storage converter body 11 and a second energy storage converter body 12, wherein the first energy storage converter body 11 and the second energy storage converter body 12 are electrically connected.

[0019] Specifically, the first energy storage converter 11, as the device under test (DUT), is the primary object of the test, and its grid-connected / off-grid performance, efficiency, control strategy, protection functions, and heat dissipation performance need to be verified. During the test, the operating status, output characteristics, and fault response of the first energy storage converter 11 will be monitored throughout by the industrial control computer 7. The second energy storage converter 12 serves as a companion device under test. This second energy storage converter 12 is a standard prototype or auxiliary device with known performance and calibration. It can be used to provide a stable reference output, simulate the counterpart converter in the actual system, or serve as an energy feedback mechanism, making the test closer to real-world application scenarios. In the feedback or joint operation mode, the second energy storage converter 12 can be precisely controlled, making it easier to isolate and quantify the performance of the device under test.

[0020] The following details the specific structure of a testing device for an energy storage converter 1 provided by an embodiment of the present invention, according to the appendix. Figure 1As shown, the specific structure of the test device for the energy storage converter 1 includes a power grid 2, a charge and discharge test unit 3, an off-grid test unit 4, a fan test unit 5, a communication test unit 6, and an industrial control computer 7.

[0021] The power grid 2 is electrically connected to the first energy storage converter body 11 and the second energy storage converter body 12.

[0022] Specifically, grid 2 provides a stable AC input power to the first energy storage converter 11, which converts the AC power from grid 2 into DC power and stores it in the energy storage battery. When grid 2 needs to replenish its power or when load demand increases, the first energy storage converter 11 converts the DC power from the energy storage battery back into AC power and outputs it to grid 2. In grid-connected mode, the AC output of the energy storage converter needs to be synchronized with the voltage, frequency, and phase of grid 2.

[0023] During the test, the power grid 2 provides a stable input power to the first energy storage converter 11, which converts AC power into DC power and stores it in the energy storage battery. When the first energy storage converter 11 outputs excess energy, the excess energy is transferred to the second energy storage converter 12 through the charge / discharge test unit 3 for recovery and reuse. The second energy storage converter 12 can adjust its output parameters according to test requirements to simulate fluctuations and fault conditions in the power grid 2, thus testing the response capability of the first energy storage converter 11.

[0024] Therefore, by electrically connecting the power grid 2 to the first energy storage converter body 11 and the second energy storage converter body 12, this energy storage converter testing device can comprehensively and efficiently test the performance of the energy storage converter. The power grid 2 provides a stable input power to the energy storage converter and simultaneously receives the electrical energy output by the energy storage converter, simulating actual operating scenarios.

[0025] In some specific embodiments, when the first energy storage converter is in charging mode, it converts DC power into AC power and inputs it into the power grid; when the first energy storage converter is in discharging mode, the second energy storage converter converts the AC power input from the power grid into DC power and inputs it into the first energy storage converter.

[0026] Specifically, the DC input terminal of the first energy storage converter receives DC power from the second energy storage converter. The first energy storage converter converts the DC power into AC power through its internal inverter. The converted AC power is then fed back into the grid through the grid interface, realizing energy recovery and utilization. The second energy storage converter, acting as a DC power source, provides the required DC power to the first energy storage converter through its internal converter. In discharge mode, the second energy storage converter obtains AC power from the grid, converts it into DC power through its internal converter, and transmits it to the DC input terminal of the first energy storage converter, thus providing DC power to the first energy storage converter.

[0027] Therefore, in charging mode, energy is recovered and utilized by converting DC power into AC power and feeding it back to the grid.

[0028] The charge / discharge test unit 3 includes a multimeter and a Hall sensor. The Hall sensor is connected to the DC circuit electrical signal of the first energy storage converter body 11, and the multimeter is connected to the AC output terminal electrical signal of the first energy storage converter body 11.

[0029] Specifically, the Hall sensor is a magnetoelectric sensor based on the Hall effect, used to measure direct current. In the charge / discharge test unit 3, the Hall sensor is connected to the DC circuit electrical signal of the first energy storage converter body 11 to monitor the magnitude and direction of the DC current in real time. The Hall sensor measures current by detecting changes in the magnetic field. When a direct current passes through a conductor, a magnetic field is generated around the conductor. The Hall sensor is placed in the magnetic field and converts the magnetic field strength into a voltage signal through the Hall effect, thereby indirectly measuring the current magnitude. The Hall sensor can monitor changes in the DC current in real time and continuously, converting the measured current signal into an electrical signal and transmitting it to the industrial control computer 7 or other control units for further processing. Thus, through the Hall sensor, the DC current of the first energy storage converter body 11 during charging and discharging can be accurately measured, which helps to evaluate the charging efficiency and discharging capacity of the first energy storage converter body 11. The multimeter is a multifunctional electronic measuring instrument used to measure various electrical parameters such as voltage, current, and resistance. The multimeter is connected to the AC output terminal of the first energy storage converter body 11 to measure AC voltage, current, and power. A multimeter can measure the voltage amplitude and frequency at the AC output terminal, which helps to assess whether the output voltage of the first energy storage converter 11 is stable and meets the requirements of the power grid 2. A multimeter can also measure the current at the AC output terminal. By measuring the current, the output power of the first energy storage converter 11 and its performance under different load conditions can be assessed. Furthermore, the active and reactive power at the AC output terminal can be calculated to assess the energy conversion efficiency and power factor of the energy storage converter.

[0030] When the first energy storage converter 11 generates excess energy during testing, such as the remaining energy after the battery is fully charged, the Hall sensor and multimeter will detect this excess energy. The charge / discharge test unit 3 will then transmit this excess energy to the second energy storage converter 12. The second energy storage converter 12 can store this energy in its connected energy storage battery or feed the energy back to the grid 2. In this way, excess energy is recovered and reused, reducing power loss during testing and improving energy efficiency. The Hall sensor and multimeter collect DC and AC parameters in real time and transmit this data to the industrial control computer 7. Based on the collected data, the industrial control computer 7 adjusts the operating parameters of the first energy storage converter 11 in real time. For example, if the DC current is detected to be too high, the industrial control computer 7 can adjust the charging current of the first energy storage converter 11; if the AC voltage is detected to be unstable, the industrial control computer 7 can adjust the output voltage of the first energy storage converter 11.

[0031] The DC and AC parameters of the first energy storage converter body 11 are monitored in real time using Hall sensors and multimeters, and energy feedback and optimized control are achieved based on these parameters.

[0032] The off-grid test unit 4 is electrically connected to the AC output terminal of the first energy storage converter body 11.

[0033] Specifically, the off-grid test unit 4 simulates the characteristics of actual loads through its internal load simulator. The load simulator can dynamically adjust the size and type of load according to test requirements. For example, it can simulate purely resistive loads, inductive loads, or capacitive loads. During the test, it can dynamically adjust according to a preset load change curve. For example, it can simulate scenarios such as sudden increases, decreases, and gradual changes in load to evaluate the performance of the first energy storage converter 11 under different load conditions. Furthermore, the off-grid test unit 4 can monitor the AC voltage output of the first energy storage converter 11 in real time. In off-grid mode, the first energy storage converter 11 needs to independently control its output voltage to ensure it remains stable within the rated range. It can also monitor the AC frequency output of the first energy storage converter 11 in real time. For example, in off-grid mode, the first energy storage converter 11 needs to independently control its output frequency to ensure it remains stable within the rated value. The voltage and frequency data are then transmitted in real time to the data acquisition and control system for subsequent analysis and control.

[0034] At the start of the test, the first energy storage converter 11 operates independently in off-grid mode, providing power to the load simulator. The off-grid test unit 4 collects the output parameters of the first energy storage converter 11 in real time, including voltage, current, frequency, and power. Based on the collected data, it dynamically adjusts the load conditions to simulate different operating scenarios. Subsequently, it evaluates the output voltage stability of the first energy storage converter 11 under different load conditions; voltage fluctuations should be within the allowable range. It also evaluates the output frequency stability and power regulation capability of the first energy storage converter 11 under load changes. Finally, the off-grid test unit 4 records the collected data for subsequent analysis. The industrial control computer 7 evaluates the off-grid performance of the first energy storage converter 11 based on the collected data. Evaluation indicators include voltage stability, frequency stability, and power regulation capability.

[0035] With this setup, the performance of the first energy storage converter 11 in the off-grid state can be evaluated through the off-grid test unit 4. For example, by simulating different load conditions and fault scenarios, the off-grid test unit 4 can accurately evaluate the voltage stability, frequency stability, and power regulation capability of the first energy storage converter 11.

[0036] The fan test unit 5 includes two wind speed sensors, one of which is located in the air intake direction of the cooling fan 13, and the other is located in the air outlet direction of the cooling fan 13.

[0037] Specifically, one anemometer is installed in the intake direction of the cooling fan 13 to measure the airflow velocity entering the cooling fan 13; the other anemometer is installed in the exhaust direction of the cooling fan 13 to measure the airflow velocity exiting the cooling fan 13. The intake anemometer measures the airflow velocity entering the cooling fan 13, which reflects the intake efficiency of the cooling fan 13 and the ventilation conditions of the surrounding environment; the exhaust anemometer measures the airflow velocity exiting the cooling fan 13, reflecting the exhaust efficiency of the cooling fan 13 and whether the cooling system can effectively dissipate heat. Each anemometer converts the measured wind speed signal into an electrical signal and transmits it to the industrial control computer 7. By monitoring the exhaust airflow velocity, the smoothness of the cooling fan 13's exhaust or outlet flow can be assessed, and whether there is any poor heat dissipation. The industrial control computer 7 receives data from two wind speed sensors and compares the inlet and outlet airflow rates. Under normal circumstances, the outlet airflow rate should be slightly lower than the inlet airflow rate because there is some energy loss during heat dissipation. By comparing the inlet and outlet airflow rates, the heat dissipation efficiency of the cooling fan 13 can be evaluated. For example, if the outlet airflow rate is significantly lower than the inlet airflow rate, it may indicate a malfunction in the cooling fan 13 or a blockage in the heat dissipation channel. If the detected wind speed is too low or fluctuates too much, the industrial control computer 7 will issue an alarm, prompting the operator to check the operating status of the cooling fan 13 and troubleshoot the problem promptly. In addition, the fan test unit 5 is electrically connected to the communication test unit 6. Based on the monitored wind speed data, the industrial control computer 7 adjusts the speed of the cooling fan 13 through the communication test unit 6. If insufficient heat dissipation efficiency is detected, the industrial control computer 7 can automatically increase the speed of the cooling fan 13 to enhance the heat dissipation effect; conversely, if the heat dissipation effect is good, the speed can be appropriately reduced.

[0038] It is understood that all wind speed sensors in the embodiments of the present invention are either hot-wire wind speed sensors or impeller wind speed sensors, and the specific type is not limited here.

[0039] It should be noted that, in this embodiment of the invention, the industrial control computer 7 sends a read command to the wind speed sensor via the RS-485 communication protocol. After receiving the command, the wind speed sensor sends the measured wind speed data back to the industrial control computer 7 via the RS-485 interface.

[0040] The communication test unit 6 is electrically connected to the first energy storage converter body 11 and the second energy storage converter body 12.

[0041] Specifically, the communication test unit 6 includes a communication interface, a signal generator, and a signal receiver. The communication interface connects the first energy storage converter body 11 and the second energy storage converter body 12, and can be RS-485, RS-232, Ethernet, CAN bus, etc. The signal generator generates test signals to simulate the transmission of communication data. The signal receiver receives and parses the communication data to verify its integrity and accuracy.

[0042] The communication test unit 6 connects to the first energy storage converter body 11 and the second energy storage converter body 12 via a communication interface. Before the test begins, the communication test unit 6 performs an interface connection test to ensure the communication link is connected normally. The signal generator generates a test signal, which can be a data packet or a complex communication protocol command. The test signal is sent to the first energy storage converter body 11 through the communication interface. After receiving the test signal, the first energy storage converter body 11 processes it according to its communication protocol and returns response data. The signal receiver receives and parses this response data, checking whether the received data is complete and accurate, including verification of data format, data content, checksum, etc. The communication test unit 6 collects data during the communication process in real time, including the sent test signals and received response data. It analyzes the collected data to evaluate communication performance, such as measuring the time interval from sending a signal to receiving a response, measuring the amount of data transmitted per unit time, and verifying whether the device can correctly parse and respond to various communication protocol commands.

[0043] For example, based on testing requirements, by configuring parameters of the communication interface, such as baud rate, data bits, and stop bits, signals are sent to verify whether the communication link between devices is normal. This includes sending different types of data packets to test the data processing capabilities and transmission rates of the devices, measuring the time interval from sending a signal to receiving a response to assess communication latency, measuring the amount of data transmitted per unit time to assess data transmission rate, and statistically analyzing the proportion of erroneous data during communication to assess communication reliability. Furthermore, a fault injection module simulates various communication faults, such as signal loss, data packet corruption, and communication interruption. Finally, the communication test unit 6 records all data during the testing process, including communication performance evaluation results and fault handling status, and generates a detailed test report, recording the testing process and results to provide a basis for subsequent improvements and optimizations.

[0044] The communication test unit 6 ensures the communication reliability, data integrity, and fault tolerance of each energy storage converter in actual operation by sending test signals, receiving response data, simulating communication failures, and evaluating communication performance, thereby verifying the communication function of the first energy storage converter body 11.

[0045] The industrial control computer 7 is electrically connected to the power grid 2, the charge and discharge test unit 3, the off-grid test unit 4, the fan test unit 5, and the communication test unit 6.

[0046] Specifically, the industrial control computer 7, as the control unit of the test device, achieves centralized control, data acquisition, analysis and processing, and result output of the entire test device through electrical signal connection with each test unit. It can not only coordinate the operation of each unit, but also monitor and process various situations in the test process in real time to ensure the accuracy and reliability of the test. Moreover, it can generate detailed test reports to provide important data support for the performance evaluation and optimization of the first energy storage converter body 11.

[0047] It should be noted that the first energy storage converter body 11 supports the PCSCAN communication protocol. Therefore, the industrial control computer 7 is connected to the first energy storage converter body 11 through a USB to CAN module. The industrial control computer 7 sends test commands to the first energy storage converter body 11 through the USB to CAN module. The first energy storage converter body 11 is connected to the industrial control computer 7 through an RS-485 interface. The industrial control computer 7 communicates with the first energy storage converter body 11 through an RS-485 to RS-232 module.

[0048] In some specific embodiments, the testing apparatus also includes an aging tester, which has a test chamber inside.

[0049] Specifically, the aging test chamber is equipped with an environmental control unit, a load simulator, and a data acquisition system. The test chamber houses each energy storage converter and provides a controllable testing environment. The environmental control unit regulates environmental conditions within the test chamber, such as temperature and humidity. The load simulator simulates actual operating load conditions, including loads of different power and types. The data acquisition system collects real-time operating data from each energy storage converter, such as voltage, current, and power.

[0050] During operation, the first energy storage converter body 11 is transported into the test chamber, a sealed environment designed to house it and ensure the safety and stability of the equipment during testing. The environmental control unit regulates the temperature within the test chamber by heating or cooling, simulating temperature environments such as 40°C and -3°C to evaluate the performance of the first energy storage converter body 11 under different temperature conditions. Furthermore, it can regulate the humidity within the test chamber by humidifying or dehumidifying to evaluate the equipment's durability under varying humidity conditions. Depending on the testing requirements, the load simulator can set different load conditions, including loads of different power and types, such as resistive, inductive, and capacitive loads. It can also simulate dynamic load changes, such as sudden increases or decreases in load, to evaluate the energy storage converter's response capability under different load conditions. Finally, the operating data, including voltage, current, frequency, and power, is collected in real-time by the data acquisition system and uploaded to the industrial control computer 7. This data is stored for subsequent analysis and processing.

[0051] By simulating the long-term operating environment and load conditions of the first energy storage converter body 11, the performance changes, reliability and durability of the first energy storage converter body 11 are comprehensively evaluated. Through long-term aging tests, the service life of the first energy storage converter body 11 can be predicted, and potential fault points and weak links can be identified.

[0052] In some specific embodiments, each wind speed sensor is provided with a magnetic attraction area; each wind speed sensor is provided with a magnetic attraction component, and each magnetic attraction component is magnetically attracted to its respective magnetic attraction area.

[0053] Specifically, the magnetic attraction area is the area set at the installation location of the wind speed sensor. It is made of magnetic material and can generate a magnetic field. The magnetic attraction component is set on the wind speed sensor and is made of magnetic material. It can magnetically attract the magnetic attraction area.

[0054] When assembling the various wind speed sensors, the magnetic attraction area generates a magnetic field through magnetic materials, providing an attraction force for the magnetic components. This allows the wind speed sensors to be quickly fixed in the designated position, ensuring that they do not loosen or shift during operation. Thus, during operation, the magnetic attraction of the magnetic attraction area and magnetic components ensures that the wind speed sensors are firmly fixed and will not shift due to vibration or airflow impact. This improves the installation reliability and ease of assembly of the wind speed sensors, reducing measurement errors caused by insecure installation and the cumbersome assembly process.

[0055] It is understood that the magnetic attraction area in this embodiment of the invention uses a magnetic material with high magnetic permeability, such as neodymium iron boron permanent magnet, to provide sufficient magnetic field strength. The magnetic attraction component can be made of magnetic materials, such as iron, nickel, cobalt, etc., to ensure good adsorption performance.

[0056] The testing device also includes a mobile cart, on which the first energy storage converter body 11 and the second energy storage converter body 12 are both mounted.

[0057] Specifically, the mobile trolley has two support layers, which provide stable placement platforms for the first energy storage converter body 11 and the second energy storage converter body 12, respectively. The mobile trolley is equipped with multiple wheels, including two omnidirectional wheels and two directional wheels, facilitating flexible movement and turning within the testing area. Operators can easily push the trolley using handles to adjust the positions of the first energy storage converter body 11 and the second energy storage converter body 12. For example, if an aging test is required on the first energy storage converter body 11, it can be pushed into the testing chamber of the aging test machine using the mobile trolley to complete the aging test.

[0058] Therefore, the mobile trolley provides a stable support platform for the first energy storage converter body 11 and the second energy storage converter body 12, and facilitates the movement and adjustment of the positions of the first energy storage converter body 11 and the second energy storage converter body 12 within the test site. It also avoids mutual interference between the first energy storage converter body 11 and the second energy storage converter body 12.

[0059] In some specific embodiments, the test device also includes a circuit breaker 8, an isolation transformer 9, and an AC contactor 10. The circuit breaker 8 is electrically connected to the first energy storage converter body 11 and the power grid 2. The isolation transformer 9 is electrically connected to the AC contactor 10 and the second energy storage converter body 12. The AC contactor 10 is also electrically connected to the power grid 2.

[0060] Specifically, circuit breaker 8 is used to control the on / off state of the circuit, protecting it from damage caused by overload and short-circuit faults. In the event of an overload or short circuit, circuit breaker 8 will automatically disconnect the circuit, protecting the equipment and personnel. Furthermore, during maintenance or testing, circuit breaker 8 can isolate the equipment from the power grid 2, ensuring the safety of operators. When the current in the circuit exceeds the set rated value, the thermal element inside circuit breaker 8 will overheat and trip, triggering circuit breaker 8 to disconnect the circuit. When a short circuit occurs, the current will increase sharply, and the electromagnetic element inside circuit breaker 8 will quickly trip, immediately disconnecting the circuit.

[0061] The isolation transformer 9 can electrically isolate the input circuit from the output circuit, preventing input circuit faults from affecting the output circuit, improving safety during testing, and converting the input voltage to the required output voltage to meet different voltage requirements. It can also effectively reduce electromagnetic interference from the input circuit to the output circuit.

[0062] The AC contactor 10 is used to control the on / off state of the AC circuit, that is, to control the on / off state of the circuit. Specifically, the AC contactor 10 works by electromagnetic principle. When the control coil is energized, the electromagnet generates a magnetic field, attracts the armature, closes the main contacts, and the circuit is turned on.

[0063] For example, grid 2 provides input power to the first energy storage converter 11 via circuit breaker 8. When the first energy storage converter 11 experiences an overload or short circuit, circuit breaker 8 automatically disconnects the circuit to protect equipment and personnel. Isolation transformer 9 converts the input voltage to the voltage required by the second energy storage converter 12, electrically isolating the input circuit from the circuit of the second energy storage converter 12, preventing input circuit faults from affecting the second energy storage converter 12. AC contactor 10 controls the connection and disconnection of the circuit between grid 2 and the second energy storage converter 12.

[0064] In some specific embodiments, the testing device also includes a switch, which is electrically connected to the industrial control computer 7, the first energy storage converter body 11, and the second energy storage converter body 12.

[0065] Specifically, the switch receives data packets from the industrial control computer 7, the first energy storage converter 11, and the second energy storage converter 12 from various ports. The switch records the MAC addresses and corresponding ports of the industrial control computer 7, the first energy storage converter 11, and the second energy storage converter 12 using a MAC address table. When a data packet arrives, the switch checks the destination MAC address and forwards the packet to the correct port based on the destination MAC address, achieving efficient data transmission. Furthermore, the switch can divide the network into multiple virtual LANs through VLANs, thereby isolating data flows from different devices and improving network security.

[0066] It should be noted that the switch in this embodiment of the invention is equipped with multiple ports, supporting the simultaneous access of multiple devices such as industrial control computer 7, first energy storage converter body 11 and second energy storage converter body 12, thereby expanding the network's connectivity.

[0067] Therefore, it can be seen that the switch in the test device ensures efficient, stable and secure data communication between the industrial control computer 7 and the energy storage converter through functions such as data exchange, network expansion, data isolation, optimized communication efficiency and remote monitoring and control.

[0068] The following describes in detail a testing method for an energy storage converter provided by an embodiment of the present invention. This testing method is applied to the testing apparatus for an energy storage converter in any of the above embodiments. Specifically, according to the appendix... Figure 2 As shown, the specific testing method for this energy storage converter includes the following steps: Start the first energy storage converter body 11 and the second energy storage converter body 12.

[0069] Specifically, the power supply line of the first energy storage converter 11 is connected to the power grid 2 or a test power source to ensure normal power supply. A start signal is sent to the first energy storage converter 11 via the industrial control computer 7 or a local control interface. This start signal is a control command for "starting." After receiving the start signal, the internal control system of the first energy storage converter 11 begins initialization, and then the first energy storage converter 11 enters a standby state, awaiting further operational commands. Similarly, the power supply line of the second energy storage converter 12 is connected to the power grid 2 or a test power source to ensure normal power supply. Again, a start signal is sent to the second energy storage converter 12 via the industrial control computer 7 or a local control interface to put the second energy storage converter 12 into a standby state, awaiting further operational commands.

[0070] In step S110, the first energy storage converter body 11 is controlled to enter the charging mode, and the multimeter and Hall sensor are controlled to collect the first performance index of the first energy storage converter body 11 in the charging mode.

[0071] Specifically, the industrial control computer 7 or the local control interface sends a control command to the first energy storage converter 11 to enter the charging mode. After receiving the control command, the internal control system of the first energy storage converter 11 adjusts its operating state and enters the charging mode. In the charging mode, the first energy storage converter 11 converts the input DC power into AC power and feeds this AC power back to the grid 2. The industrial control computer 7 or the local control interface sends a control command to the second energy storage converter 12 to input DC power to the first energy storage converter 11. After receiving the control command, the second energy storage converter 12 starts to obtain AC power from the grid 2, converts it into DC power, and then outputs the DC power to the first energy storage converter 11. The second energy storage converter 12 provides a stable DC power to the first energy storage converter 11 through its DC output terminal, ensuring that the first energy storage converter 11 can perform charging operations normally. At this time, by controlling a multimeter connected to the AC output terminal of the first energy storage converter 11, parameters such as AC voltage, current, and power are collected. These parameters reflect the AC output performance of the first energy storage converter 11 in charging mode. At the same time, a Hall sensor is connected to the DC input terminal of the first energy storage converter 11 to collect DC current. The Hall sensor measures the magnitude and direction of the DC current by detecting changes in the magnetic field, thereby evaluating the DC input performance of the first energy storage converter 11. Finally, the data collected by the multimeter and the Hall sensor are uploaded to the industrial control computer 7 for further analysis and processing.

[0072] For example, after receiving the command, the internal control system of the first energy storage converter 11 adjusts its operating mode and enters the charging state. At this time, the inverter of the first energy storage converter 11 starts to work, converting DC power into AC power. The converted AC power is fed back to the grid 2 through the grid 2 interface, simulating the process of the energy storage system supplying power to the grid 2 during charging. The industrial control computer 7 sends a control command to the second energy storage converter 12, causing it to enter the DC output mode. After receiving the command, the second energy storage converter 12 starts to obtain AC power from the grid 2 and converts the AC power into DC power through its internal rectifier. The second energy storage converter 12 provides a stable DC power to the first energy storage converter 11 through the DC output terminal, ensuring that the first energy storage converter 11 can perform normal charging operation. At this time, the multimeter measures parameters such as AC voltage, current, and power in real time and converts these data into electrical signals. Finally, the multimeter transmits the collected data to the industrial control computer 7 through the communication interface. The Hall sensor measures the magnitude and direction of DC current by detecting changes in the magnetic field and converts this data into electrical signals. The Hall sensor then transmits the collected data to the industrial control computer via a communication interface.

[0073] It should be noted that, in the charging mode, the second energy storage converter body 12 of this embodiment of the invention acts as a DC power source to provide the required DC power to the first energy storage converter body 11, ensuring that the first energy storage converter body 11 has sufficient electrical energy input during the charging process. Moreover, the second energy storage converter body 12 can obtain energy and convert it into DC power output to the first energy storage converter body 11.

[0074] During the charging process, the first energy storage converter 11 converts DC power into AC power and feeds it back to the grid 2. In this way, it not only serves the purpose of charging, but also realizes the recycling of electricity by feeding it back to the grid 2. Therefore, the first energy storage converter 11 does not need to consume electricity directly from the grid 2 when charging, but uses the DC power provided by the second energy storage converter 12 for charging, which not only improves energy utilization efficiency, but also reduces the burden on the grid 2.

[0075] In step S120, the first energy storage converter body 11 is controlled to enter the discharge mode, and the multimeter and Hall sensor are controlled to collect the second performance index of the first energy storage converter body 11 in the discharge mode.

[0076] Specifically, after receiving the command, the internal control system of the first energy storage converter 11 switches to discharge mode. At this time, the inverter section of the first energy storage converter 11 starts working, converting the DC power from the energy storage battery into AC power. The converted AC power is output to the grid 2 or the load through the grid 2 interface, simulating the operating state of the energy storage system during the discharge process. The second energy storage converter 12 obtains AC power from the grid 2 and converts it into DC power. The second energy storage converter 12 inputs the converted DC power to the first energy storage converter 11 to ensure that the first energy storage converter 11 has sufficient DC power support during the discharge process. The second energy storage converter 12 obtains energy from the grid 2 to ensure that the first energy storage converter 11 can operate stably during the discharge process. A multimeter is connected to the AC output terminal of the first energy storage converter 11 to measure parameters such as AC voltage, current, and power. A Hall sensor is connected to the DC circuit of the first energy storage converter 11 to measure the magnitude and direction of the DC current.

[0077] During operation, the industrial control computer 7 sends a command to the first energy storage converter 11 to enter the discharge mode. After receiving the command, the first energy storage converter 11 switches to the discharge mode and begins to convert the DC power from the energy storage battery into AC power and output it to the power grid 2. The industrial control computer 7 sends a command to the second energy storage converter 12 to enter the DC power output mode. The second energy storage converter 12 obtains AC power from the power grid 2 and converts it into DC power. The second energy storage converter 12 inputs the converted DC power to the first energy storage converter 11 to ensure that it has sufficient DC power support during the discharge process. Subsequently, the industrial control computer 7 sends a command to the multimeter and Hall sensor to start the data acquisition. The multimeter and Hall sensor acquire the second performance indicators of the first energy storage converter 11 in real time, such as DC current, AC voltage, power, etc. Finally, the acquired data is transmitted to the industrial control computer 7 through electrical signals.

[0078] By controlling the first energy storage converter body 11 to enter the discharge mode and having the second energy storage converter body 12 provide DC power support for it, while collecting performance indicators, this step not only achieves an efficient discharge process, but also provides important data support for the performance evaluation of the first energy storage converter body 11.

[0079] In some specific embodiments, after controlling the first energy storage converter body 11 to enter the charging mode, the steps also include controlling the first energy storage converter to convert DC power into AC power and feed it back to the grid 2, and controlling the second energy storage converter body 12 to input DC power to the first energy storage converter body 11.

[0080] Specifically, the industrial control computer 7 sends a command to the first energy storage converter body 11 to enter the charging mode. When the first energy storage converter body 11 receives the command, it switches to the charging mode. At this time, its internal DC / AC inverter converts DC power into AC power, and the first energy storage converter body 11 feeds the converted AC power back to the grid 2. In this way, by converting DC power into AC power and feeding it back to the grid 2, energy recovery and utilization are realized, reducing dependence on the grid 2 and improving energy utilization efficiency.

[0081] The steps include controlling the first energy storage converter body 11 to enter the charging mode, and then controlling the second energy storage converter body 12 to convert the AC power input from the grid 2 into DC power and input it to the first energy storage converter body 11.

[0082] Specifically, the industrial control computer 7 sends a command to put the first energy storage converter 11 into charging mode. Upon receiving the command, the first energy storage converter 11 switches to charging mode, preparing to receive DC power and charge. Simultaneously, the industrial control computer 7 sends a command to put the second energy storage converter 12 into rectification mode. The second energy storage converter 12 obtains AC power from the grid 2 and converts it into DC power. The second energy storage converter 12 outputs the converted DC power to the first energy storage converter 11. The first energy storage converter 11 receives the DC power from the second energy storage converter 12 and uses it for charging, storing the energy. The second energy storage converter 12 obtains energy from the grid 2, ensuring that the first energy storage converter 11 has sufficient energy input during charging, reducing dependence on other DC power sources.

[0083] In step S130, the off-grid test unit 4 is controlled to interrupt the connection between the grid 2 and the first energy storage converter body 11, and the third performance index of the first energy storage converter body 11 in off-grid mode is detected.

[0084] Specifically, the industrial control computer 7 sends a control command to the off-grid test unit 4 to interrupt the connection with the power grid 2. After receiving the command, the off-grid test unit 4 disconnects the connection between the power grid 2 and the first energy storage converter body 11 through its internal relays or contactors, ensuring that the first energy storage converter body 11 enters off-grid mode and operates independently. After the connection with the power grid 2 is interrupted, the first energy storage converter body 11 automatically switches to off-grid mode. At this time, the inverter part of the first energy storage converter body 11 begins to work independently, providing stable AC power to the load. In off-grid mode, the first energy storage converter body 11 no longer relies on the power grid 2, but provides energy through its internal energy storage battery to ensure normal power supply. At this time, the third performance indicators of the first energy storage converter body 11 in off-grid mode, such as output voltage, output frequency, power output capability, and overload protection function, are detected. The third performance indicators of the first energy storage converter body 11 in off-grid mode are collected in real time and transmitted to the industrial control computer 7 for further analysis and recording.

[0085] For example, the industrial control computer 7 sends a command to the off-grid test unit 4 to interrupt the connection with the power grid 2. After receiving the command, the off-grid test unit 4 disconnects the connection between the power grid 2 and the first energy storage converter body 11 through a relay or contactor, so that the first energy storage converter body 11 has entered the off-grid mode. After the connection with the power grid 2 is interrupted, the first energy storage converter body 11 automatically switches to the off-grid mode and begins to operate independently. The first energy storage converter body 11 provides energy through its internal energy storage battery or other energy storage devices to provide stable AC power to the load. At this time, the third performance indicators of the first energy storage converter body 11 in the off-grid mode, such as voltage, current, frequency, and power, can be collected in real time using detectors such as multimeters, frequency meters, and load simulators. Finally, the collected data is transmitted to the industrial control computer 7.

[0086] By controlling the off-grid test unit 4 to interrupt the connection between the grid 2 and the first energy storage converter body 11, and detecting its performance indicators in off-grid mode, this step can comprehensively evaluate the performance of the first energy storage converter body 11 when operating independently.

[0087] In step S140, each wind speed sensor is controlled to detect the fourth performance index of the cooling fan 13 during operation.

[0088] Specifically, the cooling fan 13 is part of the structure of the first energy storage converter body 11, used to provide sufficient heat dissipation during equipment operation to ensure that the equipment operates within the normal temperature range. Therefore, by detecting the fourth performance index, it is ensured that the cooling fan 13 can effectively reduce the equipment temperature and prevent overheating. For example, various wind speed sensors are used to measure the wind speed of the cooling fan 13. Specifically, a wind speed sensor is set in the air inlet direction of the cooling fan 13 to measure the air flow rate entering the cooling fan 13, and another wind speed sensor is set in the air outlet direction of the cooling fan 13 to measure the air flow rate discharged from the cooling fan 13. The industrial control computer 7 sends a start command to the cooling fan 13. After receiving the command, the cooling fan 13 starts running and enters normal working state. The industrial control computer 7 sends a start command to the wind speed sensor to start collecting wind speed data. The wind speed sensor measures the airflow speed of the cooling fan 13 in real time and converts the data into electrical signals. The wind speed sensor transmits the collected wind speed data to the industrial control computer 7 through electrical signals. The industrial control computer 7 records the collected data such as wind speed, airflow, air pressure and noise level, which is convenient for analyzing the collected data and evaluating whether the performance of the cooling fan 13 meets the design requirements.

[0089] By controlling the various wind speed sensors to detect the performance indicators of the cooling fan 13 during operation, the effectiveness of the cooling fan 13 can be evaluated. This not only ensures that the cooling fan 13 can effectively reduce the equipment temperature, but also provides important reference for the design and improvement of the cooling fan 13 through real-time data acquisition and analysis.

[0090] In step S150, the control communication test unit 6 is electrically connected to the first energy storage converter body 11 and detects the fifth performance index of the first energy storage converter body 11 when receiving or sending data.

[0091] Specifically, the fifth performance indicator includes the time delay from data transmission to reception, the amount of data transmitted within a certain time, the proportion of erroneous data during transmission, and whether the first energy storage converter body 11 can correctly parse and respond to various communication protocol commands. The communication test unit 6 is used to simulate the communication environment and test the communication performance of the first energy storage converter body 11, such as generating test signals, simulating data transmission, receiving and parsing the response data returned by the first energy storage converter body 11, and recording various performance indicators during the communication process.

[0092] For example, the industrial control computer 7 sends a control command to the communication test unit 6 to establish a communication connection. After receiving the command, the communication test unit 6 establishes an electrical signal connection with the first energy storage converter body 11 through its communication interface. The communication test unit 6 generates test signals, which can be simple handshake signals, data packets, or complex communication protocol commands. The communication test unit 6 sends the test signals to the first energy storage converter body 11 to simulate the data transmission process. After receiving the test signals, the first energy storage converter body 11 processes them according to its communication protocol and returns response data. The communication test unit 6 receives and parses the response data to verify the integrity of the data. In this way, the time interval from sending the signal to receiving the response is measured to evaluate the communication delay, the amount of data transmitted per unit time is measured to evaluate the data transmission rate, the proportion of erroneous data occurring during the communication process is statistically analyzed, and the ability of the equipment to correctly parse and respond to various communication protocol commands is verified.

[0093] Therefore, by controlling the communication test unit 6 to establish an electrical signal connection with the first energy storage converter body 11 and detecting its communication performance indicators when receiving or sending data, the communication performance of the first energy storage converter body 11 can be evaluated, ensuring that the data transmission between devices is accurate.

[0094] In step S160, the first performance index, the second performance index, the third performance index, the fourth performance index, and the fifth performance index are all uploaded to the industrial control computer 7.

[0095] Specifically, in each of the above test steps, devices such as multimeters, Hall sensors, wind speed sensors, and communication test unit 6 collect relevant performance indicators in real time. The collected analog signals are converted into digital signals by a data acquisition card, and the collected digital signals are transmitted to the industrial control computer 7 via electrical signals. The transmission to the industrial control computer 7 can be done via wired or wireless transmission. The industrial control computer 7 stores the received data on its hard drive or in its database for subsequent analysis.

[0096] By uploading the first, second, third, fourth, and fifth performance indicators to the industrial control computer 7, centralized management and analysis of test data were achieved. This not only ensured the integrity and availability of the data, but also provided important support for the performance evaluation and improvement of the energy storage converter through real-time data acquisition and analysis, and centralized management.

[0097] In some specific embodiments, before controlling the first energy storage converter body 11 to enter the charging mode, the following steps are also included: The operation status of the first energy storage converter body 11 and the second energy storage converter body 12 is checked to see if they meet the normal operating conditions.

[0098] Specifically, to verify the normal operation of the first energy storage converter body 11 and the second energy storage converter body 12, and to avoid test failures or inaccurate data due to malfunctions of the first energy storage converter body 11 and the second energy storage converter body 12 in subsequent tests, the operating status of the first energy storage converter body 11 and the second energy storage converter body 12 is checked to promptly identify potential problems and reduce the risk of damage to the first energy storage converter body 11 and the second energy storage converter body 12. Specifically, the hardware components of the equipment are checked for normal operation, such as inspecting the circuit board of the first energy storage converter body 11, measuring the electrical parameters of the equipment, such as voltage, current, and frequency, to ensure that these parameters are within the normal range, verifying the normality of the communication link between the industrial control computer 7 and the first energy storage converter body 11 and the second energy storage converter body 12 to ensure accurate data transmission, and checking the normality of the protection functions of the first energy storage converter body 11 and the second energy storage converter body 12, such as overload protection and short circuit protection.

[0099] For example, use a multimeter to measure the input and output voltages of the first energy storage converter body 11 to ensure that the voltages are within the normal range, for example, the output voltage is 220V ± 5% and the current is 90%-110% of the rated current.

[0100] If the operating status of the first energy storage converter body 11 and the second energy storage converter body 12 both meet the normal operating conditions, a self-test completion signal is sent to the industrial control computer 7; if the operating status of the first energy storage converter body 11 and / or the operating status of the second energy storage converter body 12 do not meet the normal operating conditions, a warning signal is sent to the industrial control computer 7.

[0101] Specifically, when the operating states of the first energy storage converter body 11 and the second energy storage converter body 12 both meet the normal operating conditions, a signal is sent to the industrial control computer 7 indicating that the first energy storage converter body 11 and the second energy storage converter body 12 can safely proceed to the next operation; when the operating states of the first energy storage converter body 11 and / or the second energy storage converter body 12 do not meet the normal operating conditions, a signal is sent to the industrial control computer 7 indicating that there is an abnormality in the first energy storage converter body 11 or the second energy storage converter body 12, and further inspection is required.

[0102] For example, if the output voltage of the first energy storage converter 11 is 220V and the output current is 95A, and the output voltage of the second energy storage converter 12 is 220V and the output current is 98A, then both the first and second energy storage converters 11 and 12 pass the tests and their operating conditions meet the normal operating requirements. Conversely, if only the communication status of the second energy storage converter 12 is abnormal, it cannot receive or respond to test commands. In this case, the communication status of the second energy storage converter 12 fails, its operating conditions do not meet the normal operating requirements, and a warning signal is sent to the industrial control computer 7, recording the specific error information. The industrial control computer 7 receives the self-test completion signal or warning signal from the energy storage converter through its communication interface.

[0103] By following the above steps, it can be ensured that the first energy storage converter body 11 and the second energy storage converter body 12 can operate normally after startup.

[0104] In some specific embodiments, after controlling the CAN communicator to electrically connect with the first energy storage converter body 11 and detecting the fifth performance index of the first energy storage converter body 11 when receiving or transmitting data, the following steps are also included: The first energy storage converter body 11 is subjected to aging treatment; the first energy storage converter body 11 after aging treatment is evaluated to obtain information on the degree of aging.

[0105] Specifically, aging treatment simulates the long-term operation of the first energy storage converter body 11 to evaluate its performance changes and reliability after prolonged use. Therefore, the first energy storage converter body 11 can be placed on a mobile trolley and moved into the test chamber of the aging test machine for aging treatment. After aging treatment, the first energy storage converter body 11 can be tested for various performance parameters during operation, which can be used to predict the service life of the first energy storage converter body 11 and potential failure points that may occur during long-term operation.

[0106] For example, the fifth performance indicators of the first energy storage converter body 11 in this embodiment of the invention include communication latency, data transmission rate, and error rate. If the performance indicators before aging are a communication latency of 10ms, a data transmission rate of 100Mbps, and an error rate of 0.1%, then the first energy storage converter body 11 is placed in the test chamber of the aging test unit. After aging, under test conditions of 40°C or 90% relative humidity for 24 hours, the fifth performance indicators of the first energy storage converter body 11 are then tested; wherein the communication latency is 12ms, the data transmission rate is 95Mbps, and the error rate is 0.2%.

[0107] It can be seen that the communication delay increased by 20%, the data transmission rate decreased by 5%, and the error rate increased by 100%. Based on these changes, it can be concluded that the performance of the first energy storage converter body 11 has decreased after aging treatment, and the degree of aging is relatively high.

[0108] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A testing device for an energy storage converter, characterized in that, The energy storage converter includes a cooling fan, a first energy storage converter body, and a second energy storage converter body. The cooling fan is disposed on the first energy storage converter body, and the first energy storage converter body and the second energy storage converter body are electrically connected. The testing device includes: The power grid is electrically connected to the first energy storage converter body and the second energy storage converter body; when the first energy storage converter body is in charging mode, it converts DC power into AC power and inputs it into the power grid; when the first energy storage converter body is in discharging mode, the second energy storage converter body converts the AC power input from the power grid into DC power and inputs it into the first energy storage converter body. The charging and discharging test unit includes a multimeter and a Hall sensor. The Hall sensor is connected to the DC circuit electrical signal of the first energy storage converter body, and the multimeter is connected to the AC output terminal electrical signal of the first energy storage converter body. Off-grid testing unit, wherein the off-grid testing unit is electrically connected to the AC output terminal of the first energy storage converter body; A fan testing unit includes two wind speed sensors, one of which is located in the air intake direction of the cooling fan, and the other is located in the air outlet direction of the cooling fan. A communication test unit is electrically connected to the first energy storage converter body and the second energy storage converter body. An industrial control computer is electrically connected to the power grid, the charge / discharge test unit, the off-grid test unit, the fan test unit, and the communication test unit.

2. The testing apparatus for the energy storage converter according to claim 1, characterized in that, The testing device also includes an aging tester, which has a test chamber inside.

3. The testing apparatus for the energy storage converter according to claim 1, characterized in that, Each of the aforementioned wind speed sensors is equipped with a magnetic attraction area; Each of the wind speed sensors is equipped with a magnetic attracting element, and each magnetic attracting element is magnetically attracted to its respective magnetic attracting area.

4. The testing apparatus for the energy storage converter according to claim 1, characterized in that, The testing device also includes a mobile cart, on which both the first energy storage converter body and the second energy storage converter body are mounted.

5. The testing apparatus for the energy storage converter according to claim 1, characterized in that, The testing device also includes a circuit breaker, an isolation transformer, and an AC contactor. The circuit breaker is electrically connected to the first energy storage converter body and the power grid. The isolation transformer is electrically connected to the AC contactor and the second energy storage converter body. The AC contactor is also electrically connected to the power grid.

6. The testing apparatus for the energy storage converter according to claim 1, characterized in that, The testing device also includes a switch, which is electrically connected to the industrial control computer, the first energy storage converter body, and the second energy storage converter body.

7. A test method for an energy storage converter, characterized in that, The test method is applied to the test apparatus of the energy storage converter according to any one of claims 1-6, and the test method includes: The first energy storage converter body is controlled to enter the charging mode, and the multimeter and the Hall sensor are controlled to collect the first performance index of the first energy storage converter body in the charging mode. The first energy storage converter body is controlled to enter the discharge mode, and the multimeter and the Hall sensor are controlled to collect the second performance index of the first energy storage converter body in the discharge mode. The off-grid test unit is controlled to interrupt the electrical connection between the power grid and the first energy storage converter body, and to detect the third performance index of the first energy storage converter body in off-grid mode. The wind speed sensors are controlled to detect the fourth performance index of the cooling fan during operation. The communication test unit is connected to the first energy storage converter body via electrical signals, and the fifth performance index of the first energy storage converter body is detected when receiving or sending data. The first performance index, the second performance index, the third performance index, the fourth performance index, and the fifth performance index are all uploaded to the industrial control computer.

8. The test method for the energy storage converter according to claim 7, characterized in that, Before controlling the first energy storage converter body to enter the charging mode, the method further includes: The operating status of the first energy storage converter body and the second energy storage converter body is checked to see if they meet the normal operating conditions. If the operating states of both the first energy storage converter body and the second energy storage converter body meet the normal operating conditions, a self-test completion signal is sent to the industrial control computer. If the operating status of the first energy storage converter and / or the second energy storage converter does not meet the normal operating conditions, a warning signal is sent to the industrial control computer.

9. The test method for the energy storage converter according to claim 7, characterized in that, After controlling the communication test unit to be electrically connected to the first energy storage converter body and detecting the fifth performance index of the first energy storage converter body when receiving or sending data, the method further includes: The first energy storage converter body is subjected to aging treatment. The first energy storage converter body after aging treatment is evaluated to obtain information on the degree of aging.

10. The test method for the energy storage converter according to claim 7, characterized in that, The steps include, after controlling the first energy storage converter to enter the charging mode, controlling the first energy storage converter to convert DC power to AC power and feed it back to the grid, and controlling the second energy storage converter to input DC power to the first energy storage converter. The steps include, after controlling the first energy storage converter body to enter the discharge mode, controlling the second energy storage converter body to convert the AC power input from the grid into DC power and input it to the first energy storage converter body.

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