Fault diagnosis test system of household energy storage system

Abstract

The utility model relates to the technical field of energy storage system testing, and discloses a fault diagnosis testing system of a household energy storage system, the household energy storage system comprises a battery main control unit, and the fault diagnosis testing system comprises a hardware-in-the-loop simulation device, a single monitoring unit and an upper computer. The hardware-in-the-loop simulation equipment comprises a simulation module and a communication module, the simulation module is used for simulating and outputting an electric signal of the household energy storage system, and the communication module is used for realizing communication connection between the simulation module and the upper computer; the single monitoring unit is used for collecting the electric signal output by the simulation module and outputting the electric signal to the battery main control unit; the battery main control unit generates an action signal based on the electric signal and outputs the action signal to an upper computer, actual charging and discharging operation does not need to be carried out during testing, and the situation that the household energy storage system to be tested is damaged by some specific testing items can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage system test technical field especially relates to a kind of fault diagnosis test system of household energy storage system. BACKGROUND

[0002] With the widespread application of household energy storage system, and mainly by end user, the security of entire energy storage system gradually appears particularly important, the diagnosis of household energy storage system fault, early warning and protection function must need to be fully verified, which puts forward higher requirements to fault diagnosis test system.

[0003] The conventional test scheme is that household energy storage system is as a whole, input end is connected to mains, output end is connected to load, actual charge-discharge operation is carried out, to test whether correct protection action is produced under various fault conditions of system. When testing using this test scheme, since actual charge-discharge operation is needed, some specific test items will cause damage to the household energy storage system to be tested, therefore, a fault diagnosis test system is urgently needed to solve the above problems. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a kind of fault diagnosis test system of household energy storage system to solve or partially solve the technical problem that existing test scheme can cause damage to the household energy storage system to be tested.

[0005] The technical scheme provided by the utility model is as follows:

[0006] The utility model provides a kind of fault diagnosis test system of household energy storage system, and household energy storage system includes battery main control unit, and fault diagnosis test system includes hardware-in-the-loop simulation device, single body monitoring unit and host computer;Hardware-in-the-loop simulation device includes simulation module and communication module, simulation module is used to simulate output electric signal of household energy storage system, and communication module is used to realize the communication connection of simulation module and host computer;Single body monitoring unit is used to gather electric signal output by simulation module and exports electric signal to battery main control unit;Battery main control unit generates action signal based on electric signal, and exports action signal to host computer.

[0007] The utility model discloses a kind of fault diagnosis test systems of household energy storage system, simulation module in hardware-in-the-loop simulation equipment is connected by communication module and host computer, whereby test personnel can pass through host computer input control instruction to make simulation module simulate output household energy storage system's electric signal, monomer monitoring unit gathers the electric signal that simulation module outputs and the electric signal is output to battery master unit, battery master unit generates action signal according to received electric signal, and action signal is output to host computer, test personnel can judge whether the output of battery master unit is correct according to the action signal received by host computer, to further be able to diagnose and test battery master unit in household energy storage system, entire process does not need to carry out actual charge-discharge operation, some specific test items can be avoided to cause damage to the situation of household energy storage system to be tested, and test is convenient.

[0008] In an alternative embodiment, the simulation module includes a programmable analog power supply and a battery simulator, the programmable analog power supply is used to simulate output power supply output signal of household energy storage system, and the battery simulator is used to simulate voltage signal across energy storage battery in household energy storage system.

[0009] In this embodiment, by adding programmable analog power supply and battery simulator, power supply output signal of household energy storage system and voltage signal across energy storage battery can be simulated more accurately, which helps to detect and diagnose battery and power supply related faults more accurately.

[0010] In an alternative embodiment, the programmable analog power supply includes a low-voltage programmable analog power supply and a high-voltage programmable analog power supply, the low-voltage programmable analog power supply is used to simulate output power supply voltage signal of battery master unit, and the high-voltage programmable analog power supply is used to simulate output high-voltage acquisition signal of battery master unit.

[0011] In this embodiment, by distinguishing low-voltage and high-voltage programmable analog power supply, power supply voltage signal and high-voltage acquisition signal of battery master unit can be simulated more meticulously.

[0012] In an alternative embodiment, the communication module includes a switch, the low-voltage programmable analog power supply, the high-voltage programmable analog power supply and the battery simulator are all communicated and connected with the host computer through the switch.

[0013] Through the use of switch, efficient communication connection between low-voltage programmable analog power supply, high-voltage programmable analog power supply, battery simulator and host computer is realized, system architecture is simplified, and stability and efficiency of data transmission are improved.

[0014] In an alternative embodiment, the simulation module further includes a programmable resistance card, the programmable resistance card is used to simulate output resistance value signal of temperature sensor in household energy storage system.

[0015] In this embodiment, the addition of the programmable resistance card enables the system to simulate the resistance value signal of the temperature sensor in the home energy storage system, which is crucial for temperature-related fault diagnosis.

[0016] In an alternative embodiment, the simulation module further comprises an IO card; the IO card is connected with the digital detection channel of the battery master unit for simulating the digital interactive signal provided by the external device; and / or, the IO card is connected with the digital output channel of the battery master unit for receiving the digital control signal output by the battery master unit to the external device.

[0017] In this embodiment, the digital interactive signal between the battery master unit and the external device can be simulated through the IO card, thereby expanding the test range.

[0018] In an alternative embodiment, the simulation module further comprises an AO card; the AO card is connected with the analog detection channel of the battery master unit for simulating the analog interactive signal of the external device; and / or, the AO card is connected with the analog output channel of the battery master unit for receiving the analog control signal output by the battery master unit to the external device.

[0019] In this embodiment, the analog interactive signal between the battery master unit and the external device can be simulated through the AO card, thereby expanding the test range.

[0020] In an alternative embodiment, the simulation module further comprises a high-voltage loop simulation box, which comprises a plurality of relays for building a simulated high-voltage loop of the home energy storage system.

[0021] In this embodiment, the simulated high-voltage loop built by the relays can more realistically simulate the working state of the home energy storage system under high-voltage environment, which is helpful for the diagnosis of high-voltage related faults.

[0022] In an alternative embodiment, the communication module comprises a CAN bus communication tool, and the programmable resistance card, the IO card, the AO card, and the high-voltage loop simulation box are all connected with the upper computer through the CAN bus communication tool.

[0023] In this embodiment, the use of the CAN bus communication tool enables efficient communication connection between the programmable resistance card, the IO card, the AO card, and the high-voltage loop simulation box and the upper computer, further enhancing the communication ability and data processing ability of the system.

[0024] In an alternative embodiment, the output voltage signal of the low-voltage programmable simulation power supply is 0V to 24V, and the output voltage signal of the high-voltage programmable simulation power supply is 0V to 1000V.

[0025] In this embodiment, the running state of the household energy storage system under different voltage conditions can be simulated and diagnosed more accurately. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly express the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings described in the following are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 The structural block diagram of the fault diagnosis test system of the household energy storage system in the embodiments of the present application is shown in the figure.

[0028] Figure 2 The structural block diagram of the control method of the hardware-in-the-loop simulation device in the embodiments of the present application is shown in the figure.

[0029] Figure 3 The circuit topology diagram of the battery master control unit and the single cell monitoring unit in the embodiments of the present application is shown in the figure.

[0030] Figure 4 The circuit topology diagram of the high-voltage loop simulation box in the embodiments of the present application is shown in the figure. DETAILED DESCRIPTION

[0031] The technical scheme of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the terms "mount", "link", "connect" should be understood broadly, for example, it can be fixed connection, also can be detachable connection, or integrally connected;It can be mechanical connection, also can be electrical connection;It can be directly connected, also can be indirectly connected through intermediate medium, also can be the intercommunication of two elements, can be wireless connection, also can be wired connection.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0034] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0035] At present, the conventional test scheme of the household energy storage system is to connect the input end of the household energy storage system to the commercial power and connect the output end to the load to carry out actual charge-discharge operation to test various fault conditions of the system and protection action.This kind of test scheme has long test cycle, since actual charge-discharge operation is needed, some fault conditions are difficult to meet and have risks, some specific test items will cause damage to the system to be tested and have safety hazards for personnel operation, and test items are difficult to cover completely.

[0036] Therefore, the utility model provides a fault diagnosis test system of household energy storage system, which can improve test efficiency, realize fault conditions difficult to realize on the whole machine through signal simulation, improve fault test coverage rate and will not cause damage to the equipment to be tested.

[0037] As shown in Figure 1 , Figure 2 and Figure 3 , the utility model embodiment provides a kind of fault diagnosis test system of household energy storage system, and household energy storage system includes battery main control unit (Battery Management Unit, BMU), battery main control unit BMU is responsible for monitoring the state of battery pack in household energy storage system, including the voltage, current, temperature and residual capacity of battery etc., battery main control unit BMS is also responsible for balancing the charge-discharge of battery, to ensure the safety and long life of battery.The fault diagnosis test system of household energy storage system of the utility model mainly takes battery main control unit BMS as the object to be tested to carry out diagnosis test.

[0038] Specifically, the fault diagnosis test system comprises a hardware-in-the-loop (HIL) simulation device, a cell monitoring unit (CMU) and a host computer. The HIL simulation device comprises an analog module and a communication module, the analog module is configured to simulate output of electrical signals of the home energy storage system, and the communication module is configured to realize communication connection between the analog module and the host computer; the CMU is configured to collect the electrical signals output by the analog module and output the electrical signals to a battery master unit; and the battery master unit is configured to generate action signals based on the electrical signals and output the action signals to the host computer.

[0039] The HIL simulation device comprises a case and an analog module and a communication module arranged in the case, the analog module simulates output of electrical signals including cell voltage and temperature signals, the analog module is connected to the CMU through connection terminals, and the CMU transmits the collected electrical signals to corresponding input ends of the battery master unit (BMS) through daisy chaining.

[0040] The analog module is in communication connection with the host computer through the communication module, so that a tester can input test signals to the host computer to control values of the electrical signals simulated and output by the analog module.

[0041] The communication module comprises wired communication and wireless communication, for example, a CAN communication module and a Bluetooth communication module.

[0042] Meanwhile, the battery master unit and the host computer are in CAN communication connection, and the host computer receives action signals and monitoring information fed back by the battery master unit based on the CAN communication.

[0043] The tester judges whether the battery master unit can output correct instructions based on the action signals fed back by the battery master unit, thereby realizing test of the battery master unit.

[0044] The fault diagnosis test system of the home energy storage system according to the embodiment of the utility model, the analog module in the hardware-in-the-loop simulation device is connected with the host computer through the communication module, so that a tester can input control instructions to the host computer to make the analog module simulate output of electrical signals of the home energy storage system, the CMU collects the electrical signals output by the analog module and outputs the electrical signals to the battery master unit, the battery master unit generates action signals according to the received electrical signals and outputs the action signals to the host computer, and the tester can judge whether the output of the battery master unit is correct according to the action signals received by the host computer, thereby realizing diagnosis and test of the battery master unit in the home energy storage system, the whole process does not need to be actually charged and discharged, some specific test items can be avoided to cause damage to the home energy storage system to be tested, and the test is convenient.

[0045] In some embodiments, the simulation module comprises a programmable analog power supply for simulating the power output signal of the home energy storage system and a battery simulator for simulating the voltage signal across the energy storage battery in the home energy storage system.

[0046] Specifically, the programmable analog power supply comprises a low-voltage programmable analog power supply for simulating the power supply voltage signal of the battery master unit and a high-voltage programmable analog power supply for simulating the high-voltage acquisition signal of the battery master unit. By distinguishing the low-voltage and high-voltage programmable analog power supplies, the power supply voltage signal and the high-voltage acquisition signal of the battery master unit can be simulated more meticulously.

[0047] With the addition of the programmable analog power supply and the battery simulator, the power output signal of the home energy storage system and the voltage signal across the energy storage battery can be simulated more accurately, which helps to detect and diagnose battery and power-related faults more accurately.

[0048] Further, the output voltage signal of the low-voltage programmable analog power supply is 0V to 24V, and the 0V to 24V DC voltage output can be set by the upper computer, which can provide control and power supply voltage for the battery master unit BMS, and by setting the voltage output, the power supply voltage abnormal fault can be tested.

[0049] The output voltage signal of the high-voltage programmable analog power supply is 0V to 1000V, and the 0V-1000V DC voltage output can be set by the upper computer, which can input the high-voltage acquisition signal for the battery master unit BMS, and by setting the voltage output, the total voltage abnormal fault can be tested, and thus the running state of the home energy storage system under different voltage conditions can be simulated and diagnosed more accurately.

[0050] In some embodiments, the communication module comprises a switch, and the low-voltage programmable analog power supply, the high-voltage programmable analog power supply and the battery simulator are all connected in communication with the upper computer through the switch.

[0051] Specifically, the switch as a gateway device can realize TCP communication between the low-voltage programmable analog power supply, the high-voltage programmable analog power supply, the battery simulator and the upper computer.

[0052] The upper computer sends the control instructions input by the test personnel to the low-voltage programmable analog power supply, the high-voltage programmable analog power supply and the battery simulator through TCP communication to regulate and control the output signal.

[0053] For example, the host computer can set the voltage output of the low-voltage program-controlled analog power supply to any DC voltage value between 0V and 24V, and provide a control voltage for the battery master unit BMS, and set the voltage output of the high-voltage program-controlled analog power supply to any DC voltage value between 0V and 1000V, and provide a high-voltage acquisition power supply for the battery master unit BMS.

[0054] The battery simulator comprises a plurality of voltage output channels connected with the low-voltage program-controlled analog power supply, and each channel outputs to a corresponding battery detection end of the battery master unit BMS, and through the host computer, the voltage output of each channel in the battery simulator can be set, so that the single overvoltage, single undervoltage, and single voltage difference fault of the battery can be tested, and the voltage acquisition short circuit and short line fault can be simulated.

[0055] The fault diagnosis test system of the household energy storage system of the utility model, through the use of the switch, realizes the efficient communication connection between the low-voltage program-controlled analog power supply, the high-voltage program-controlled analog power supply, the battery simulator and the host computer, simplifies the system architecture, and improves the stability and efficiency of data transmission.

[0056] In some embodiments, the simulation module further comprises a program-controlled resistance card, which is used to simulate the resistance value signal of the temperature sensor in the household energy storage system.

[0057] Specifically, the temperature sensor in the household energy storage system is an NTR thermistor, and its resistance value decreases with the increase of temperature, so that the battery master unit BMS can determine whether the battery temperature is too high by detecting the resistance value signal of the temperature sensor and then initiate an alarm.

[0058] The program-controlled resistance card is a hardware capable of outputting a resistance value signal, has a plurality of output channels, and can set the resistance value of each output channel for the battery master unit BMS through the host computer. After receiving the resistance value signal, the battery master unit BMS sends the protection action generated by it to the host computer, so that the situation of the temperature sensor issuing an alarm can be simulated, the battery cell overtemperature, single low temperature and single temperature difference fault can be tested, and the temperature acquisition short circuit and short line fault can be simulated.

[0059] In this embodiment, the addition of the program-controlled resistance card enables the system to simulate the resistance value signal of the temperature sensor in the household energy storage system, which is crucial for temperature-related fault diagnosis.

[0060] In some embodiments, the simulation module further comprises an IO board card and an AO board card.

[0061] The IO board card is connected with the digital quantity detection channel of the battery master unit, and is used to simulate the digital quantity interaction signal provided by the external device; and / or, the IO board card is connected with the digital quantity output channel of the battery master unit, and is used to receive the digital quantity control signal output by the battery master unit to the external device.

[0062] The analog module also includes an AO board; the AO board is connected to the analog quantity detection channel of the battery main control unit for simulating the output of analog quantity interaction signals from external devices; and / or, the AO board is connected to the analog quantity output channel of the battery main control unit for receiving analog quantity control signals output by the battery main control unit to external devices.

[0063] The IO board and AO board each have multiple digital output channels and analog output channels.

[0064] The host computer can be used to configure the digital signal output of each digital output channel of the IO board, which can be connected to the digital detection channel of the battery main control unit (BMS) to test for abnormal faults of external devices. At the same time, it can also be connected to the digital output channel of the battery main control unit (BMS) to detect the digital signal output of the battery main control unit (BMS) and test the control logic of the battery main control unit (BMS) for external devices.

[0065] The host computer can be used to configure the analog signal output of each analog output channel of the AO board, which can be connected to the analog detection channel of the battery main control unit (BMS) to test for abnormal faults of external devices. At the same time, it can also be connected to the analog output channel of the battery main control unit (BMS) to detect the digital signal output of the battery main control unit (BMS) and test the control logic of the battery main control unit (BMS) for external devices.

[0066] In some embodiments, the simulation module further includes a high-voltage circuit simulation box, which includes several relays to build a simulated high-voltage circuit for a home energy storage system.

[0067] Specifically, the connection topology of the relays in the high-voltage circuit simulation box is the same as that of the actual high-voltage circuit of a home energy storage system.

[0068] In one example, the connection topology of the high-voltage circuit simulation box is as follows: Figure 4 As shown, it includes several relays and 9 high-voltage sampling points. The control terminals of the relays are controlled by signals output from the host computer. The LINK+ and LINK- pins are connected to the voltage output terminals of the high-voltage programmable analog power supply. High-voltage sampling points 1-9 are connected to the high-voltage sampling lines of the battery main control unit (BMS). By controlling the closing of different combinations of relays, the timing of high-voltage detection by different high-voltage sampling lines of the BMS is different, thereby simulating a high-voltage circuit fault.

[0069] by Figure 4 For example, the host computer controls relays Ry10, Ry12, Ry17 and Ry19 to close, and high-voltage sampling points 1 and 6 are connected to the positive and negative terminals of the high-voltage sampling line at the front end of the battery main control unit (BMS) relay, respectively, and controls relays Ry1 and Ry6 to close.

[0070] High-voltage sampling points 3, 8 are connected to the high-voltage sampling line positive and negative levels of the battery master unit BMS relay rear end, respectively, to control the closing of relays Ry3 and Ry8;

[0071] When the main relays Ra1, Ra2 and Ra3 are not closed, control Rly11, Rly12, Rly18 and Rly19 are closed, and the battery master unit BMS can detect the rear-end voltage through high-voltage sampling points 3 and 8, so that the relay sticking failure can be tested.

[0072] When the main relays Ra1, Ra2 and Ra3 are closed, control Rly12 and Rly19 are disconnected, and the BMU cannot detect the rear-end voltage, so that the relay failure fault can be tested.

[0073] In this embodiment, the simulated high-voltage loop is built through relays, which can more realistically simulate the working state of the home energy storage system in a high-voltage environment, and is helpful for the diagnosis of high-voltage related faults.

[0074] In some embodiments, the communication module includes a CAN bus communication tool, and the program-controlled resistance card, the IO board card, the AO board card and the high-voltage loop simulation box are all connected to the upper computer through the CAN bus communication tool.

[0075] The CAN bus communication tool can use a wireless CAN transparent transmission module or a wireless CAN gateway, and the CAN bus communication tool is used to realize the CAN message interaction between the upper computer and the program-controlled resistance card, the IO board card, the AO board card and the high-voltage loop simulation box, thereby enhancing the communication ability and data processing ability of the system.

[0076] The fault diagnosis and test system of the home energy storage system according to the embodiment of the utility model, through the simulation module in the hardware-in-the-loop simulation device HIL simulates the fault condition, and outputs the electric signal corresponding to the fault condition to the battery master unit BMS, after waiting for the fault triggering time, the upper computer receives the action signal of the battery master unit BMS, judges whether the generated action signal is correct, and further can diagnose and test the battery master unit in the home energy storage system.

[0077] In an example process, the upper computer modifies the resistance value of a certain output channel of the program-controlled resistance card, and the corresponding temperature is greater than the over-temperature protection alarm threshold. After waiting for the protection triggering time, the upper computer receives the action signal returned by the battery master unit BMS, and judges whether the battery master unit BMS reports over-temperature protection and outputs the relay drive signal to control the shutdown of devices such as the power converter PCS, and further judges whether the function of the battery master unit BMS is normal.

[0078] The fault diagnosis test system of the household energy storage system can improve test efficiency, the fault condition difficult to realize on the whole machine can be realized through signal simulation, improves fault test coverage, and will not cause damage to the device to be tested.

[0079] Although the example embodiments and their advantages have been described in detail, those skilled in the art can make various changes, substitutions and modifications to the embodiments without departing from the spirit of the present application and the scope of the defined protection, and such modifications and variations fall within the scope defined.

Claims

1. A fault diagnosis and testing system for a home energy storage system, the home energy storage system including a battery main control unit, characterized in that, The fault diagnosis test system comprises a hardware-in-the-loop simulation device, a single monitoring unit and an upper computer; The hardware-in-the-loop simulation device comprises an analog module and a communication module, the analog module is used for simulating output of electrical signals of a household energy storage system, and the communication module is used for realizing communication connection of the analog module and the upper computer; The single monitoring unit is used for collecting the electrical signals output by the analog module and outputting the electrical signals to the battery master control unit; The battery master control unit generates an action signal based on the electrical signals and outputs the action signal to the upper computer.

2. The fault diagnostic test system for a home energy storage system according to claim 1, characterized by, The analog module comprises a programmable analog power supply and a battery simulator, the programmable analog power supply is used for simulating output of a power supply output signal of the household energy storage system, and the battery simulator is used for simulating a voltage signal between energy storage batteries in the household energy storage system.

3. The fault diagnostic test system for a home energy storage system according to claim 2, wherein, The programmable analog power supply comprises a low-voltage programmable analog power supply and a high-voltage programmable analog power supply, the low-voltage programmable analog power supply is used for simulating output of a power supply voltage signal of the battery master control unit, and the high-voltage programmable analog power supply is used for simulating output of a high-voltage collection signal of the battery master control unit.

4. The fault diagnostic test system for a home energy storage system according to claim 3, wherein, The communication module comprises a switch, the low-voltage programmable analog power supply, the high-voltage programmable analog power supply and the battery simulator are all in communication connection with the upper computer through the switch.

5. The fault diagnostic test system for a home energy storage system of claim 1, wherein, The analog module further comprises a programmable resistance card, the programmable resistance card is used for simulating output of a resistance value signal of a temperature sensor in the household energy storage system.

6. The fault diagnostic test system for a home energy storage system according to claim 5, wherein, The analog module further comprises an IO board card; The IO board card is connected with a digital quantity detection channel of the battery master control unit, and is used for simulating output of a digital quantity interaction signal provided by an external device; And / or, the IO board card is connected with a digital quantity output channel of the battery master control unit, and is used for receiving a digital quantity control signal output by the battery master control unit to the external device.

7. The fault diagnostic test system for a home energy storage system of claim 6, wherein, The analog module further comprises an AO board card; The AO board card is connected with an analog quantity detection channel of the battery master control unit, and is used for simulating output of an analog quantity interaction signal of an external device; And / or, the AO board card is connected with an analog quantity output channel of the battery master control unit, and is used for receiving an analog quantity control signal output by the battery master control unit to the external device.

8. The fault diagnostic test system for a home energy storage system according to claim 7, wherein, The analog module further comprises a high-voltage loop simulation box, the high-voltage loop simulation box comprises a plurality of relays, and a simulated high-voltage loop of the household energy storage system is built through the relays.

9. The fault diagnostic test system for a home energy storage system of claim 8, wherein, The communication module comprises a CAN bus communication tool, the programmable resistance card, the IO board card, the AO board card and the high-voltage loop simulation box are all in communication connection with the upper computer through the CAN bus communication tool.

10. The fault diagnostic test system for a home energy storage system of claim 3, wherein, An output voltage signal of the low-voltage programmable analog power supply is 0V to 24V, and an output voltage signal of the high-voltage programmable analog power supply is 0V to 1000V.

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