Test method and test system for energy storage converter power unit, and energy storage converter power unit

Abstract

The invention provides a test method and a test system for an energy storage converter power unit, and the energy storage converter power unit. The test system comprises N test subsystems and a control circuit, and N is an integer greater than 1; the control circuit is used for responding to a control instruction and setting the working state of a control switch in the control circuit, so that the test system is in a working mode corresponding to the control instruction. According to the exemplary embodiment, the production efficiency of the energy storage equipment can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of energy storage technology, and in particular to a testing method and a testing system for an energy storage and current conversion power unit, and an energy storage and current conversion power unit. Background Art

[0002] The energy storage and conversion power unit is an important component second only to the battery in the cascade high-voltage energy storage device. It includes a rectifier and an inverter. The energy storage and conversion power unit determines the quality and characteristics of the output electric energy.

[0003] With the development of clean energy, energy storage technology has become the key to promoting large-scale grid connection of renewable energy, enhancing grid resilience and realizing distributed energy management. How to quickly and effectively verify the functionality of the power unit is one of the important factors in promoting the improvement of the operational stability of the energy storage system. In related technologies, the functional testing efficiency of the power unit before assembly is low, resulting in low production efficiency of energy storage equipment.

[0004] It should be noted that the statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art. Summary of the invention

[0005] In view of the above problems, a test method, a test system and an energy storage conversion power unit are proposed to overcome the above problems or at least partially solve the above problems.

[0006] The embodiments of the present disclosure adopt the following technical solutions:

[0007] In a first aspect, a test system is provided, comprising: N test subsystems and a control circuit, wherein N is an integer greater than 1; the control circuit is used to, in response to a control instruction, set the working state of a control switch in the control circuit so that the test system is in a working mode corresponding to the control instruction.

[0008] Preferably, the working mode includes at least one of the following: reverse polarity mode, low current mode and high current mode; each of the test subsystems includes an energy storage and conversion power unit, and the control circuit is also used to control multiple energy storage and conversion power units to perform high current mode testing at the same time, and to control each of the energy storage and conversion power units to perform the reverse polarity mode testing and the low current mode testing respectively.

[0009] Preferably, the control circuit includes a polarity reversal unit; each of the test subsystems also includes a rectifier module, a contactor and an isolation transformer, the contactor is arranged between the rectifier module and the isolation transformer, and the energy storage conversion power unit is connected to the rectifier module through a circuit breaker; when performing the test of the polarity reversal mode, the control circuit is also used to connect the load unit to the first test subsystem of the test system by setting the working state of the control switch; enable the polarity reversal unit to reverse the positive and negative poles of the rectifier module and the positive and negative poles of the energy storage conversion power unit to verify the polarity reversal performance of the energy storage conversion power unit in the first test subsystem; obtain the polarity reversal test result of the energy storage conversion power unit in the first test subsystem through the interactive interface of the control circuit.

[0010] Preferably, when performing the test of the low current mode, the control circuit is also used to, by setting the working state of the control switch, connect the load unit to the first test subsystem of the test system; by setting the working states of the contactor and the circuit breaker in the first test subsystem, enable the energy storage and conversion power unit in the first test subsystem to operate in a first preset current; and obtain the low current test results of the energy storage and conversion power unit in the first test subsystem through the interactive interface of the control circuit.

[0011] Preferably, when performing the test of the high current mode, the control circuit is also used to, by setting the working state of the control switch, enable N energy storage and conversion power units in the N test systems to be cascaded, and at the same time enable the load unit to be connected to the test system; by setting the working state of the corresponding contactor and the circuit breaker in each of the test subsystems, enable N energy storage and conversion power units in the N test subsystems to operate in a second preset current; and obtain the high current test results of the N energy storage and conversion power units in the test system through the interactive interface of the control circuit.

[0012] Preferably, the control circuit is also used to test the energy storage and conversion power units in the remaining N-1 test subsystems in reverse polarity mode in turn, and obtain the reverse polarity test results of the corresponding energy storage and conversion power units in the remaining N-1 test subsystems through the interactive interface of the control circuit. Preferably, the control circuit is also used to test the energy storage and conversion power units in the remaining N-1 test subsystems in low current mode in turn, and obtain the low current test results of the corresponding energy storage and conversion power units in the remaining N-1 test subsystems through the interactive interface of the control circuit.

[0013] Preferably, when the polarity reversal mode tests of N energy storage and conversion power units in the N test subsystems are all passed, the control circuit enters the test of the small current mode; when the small current mode tests of N energy storage and conversion power units in the N test subsystems are all passed, the control circuit enters the test of the large current mode.

[0014] In a second aspect, an energy storage and current conversion power unit is provided, which is tested using any test system as described in the first aspect.

[0015] In a third aspect, a testing method for an energy storage conversion power unit is provided, which is applied to any test system as described in the first aspect, and the testing method includes: powering on the energy storage conversion power unit to be tested; in response to a first test instruction, setting the working state of a control switch so that the energy storage conversion power unit to be tested is in a first working mode corresponding to the first test instruction for testing; if each of the energy storage conversion power units to be tested is in a normal state under the first working mode, then in response to a second test instruction, setting the working state of the control switch so that multiple energy storage conversion power units to be tested are simultaneously in a second working mode corresponding to the second test instruction for testing.

[0016] At least one of the above technical solutions adopted by the exemplary embodiment can achieve the following beneficial effects:

[0017] In an exemplary embodiment of the present disclosure, multiple energy storage and current conversion power units are simultaneously arranged in a test system to sequentially perform multiple mode tests, thereby reducing test time and improving test efficiency, thereby accelerating the delivery speed of the cascaded high-voltage energy storage system.

[0018] It should be understood that the invention summary is not intended to identify the key or essential features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of some embodiments of the present disclosure in the accompanying drawings, in which:

[0020] Figure 1 A schematic diagram of a test system in an embodiment of the present disclosure;

[0021] Figure 2 A test system link diagram in an embodiment of the present disclosure;

[0022] Figure 3 The figure is a flow chart of a method for testing an energy storage power conversion unit in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] The principle of the present disclosure will now be described with reference to some embodiments. It should be understood that the description of these embodiments is only for illustrative purposes, and helps those skilled in the art to understand and implement the present disclosure, without any limitation to the scope of the present disclosure. The disclosure described herein can be implemented in a manner different from that described below.

[0024] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0025] References in this disclosure to "one embodiment," "an embodiment," "an exemplary embodiment," etc. indicate that the described embodiment may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment. In addition, when a particular feature, structure, or characteristic is described in conjunction with an exemplary embodiment, whether or not explicitly described, those skilled in the art will recognize that such feature, structure, or characteristic affects incorporation into other embodiments.

[0026] It should be understood that although the terms "first" and "second" etc. may be used to describe various elements herein, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the exemplary embodiments, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term "and / or" as used herein includes any and all combinations of one or more of the listed terms.

[0027] The terms used herein are only for describing specific embodiments, rather than for limiting exemplary embodiments. The singular forms "one", "an", and "the" used herein also include plural forms, unless the context clearly indicates otherwise. "A group of elements" or "element set" used herein is intended to include one or more elements. It should also be understood that the terms "include", "comprise", "have", "have", "include" and / or "include", when used herein, specify the presence of the features, elements and / or parts, etc., but do not exclude the presence or addition of one or more other features, elements, parts and / or combinations thereof.

[0028] As used in this disclosure, the term "circuitry" may refer to one or more or all of the following:

[0029] (a) Hardware circuit implementation only (e.g., implementation only in analog and / or digital circuits)

[0030] (b) a combination of hardware circuitry and software, such as (where applicable):

[0031] (i) a combination of analog and / or digital hardware circuits and software / firmware; and

[0032] (ii) any portion of a hardware processor (including a digital signal processor) with software, software and memory that work together to enable a device such as a mobile phone or server to perform various functions, and

[0033] (c) A hardware circuit and / or processor, such as a microprocessor or portion of a microprocessor, that requires software (e.g., firmware) to operate, but where software is not required for operation, the software may not be present.

[0034] This definition of circuitry applies to all uses of this term in this disclosure, including in any claims. As another example, as used in this disclosure, the term circuitry also includes merely a hardware circuit or processor (or multiple processors) or a portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware implementation. The term circuitry also includes, for example, if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device, or a similar integrated circuit in a server, cellular network device, or other computing network device.

[0035] In an exemplary embodiment, in response to the current situation in the related art that the energy storage inverter power unit test system is complex and the test efficiency is low, a test system for energy storage inverter power units with strong universality is designed. The system can operate multiple energy storage inverter power units under rated conditions at the same time by setting a control circuit, thereby improving the utilization rate of the load, reducing the complexity of the test system, and improving the test efficiency.

[0036] The technical solutions provided by various embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0037] The disclosed embodiments provide a test method, a test system and an energy storage and current conversion power unit. Figure 1 As shown, a test system 100 for an energy storage conversion power unit in an embodiment of the present disclosure is provided, and the test system 100 includes: N test subsystems and a control circuit 110, wherein N is an integer greater than 1; the control circuit is used to, in response to a control instruction, set the working state of a control switch in the control circuit so that the test system is in a working mode corresponding to the control instruction.

[0038] like Figure 1 As shown, the test system includes N test subsystems, test subsystem 1 (1201), test subsystem 2 (1202), test subsystem 3 (1203) ... test subsystem N (120N), and the test subsystems are connected in parallel.

[0039] Figure 1 Combination Figure 2 As shown, each of the test subsystems includes an energy storage and conversion power unit, which are marked as 2, 3 and 4 in the figure, a rectifier module 5, a contactor 6 and an isolation transformer 7. The contactor 6 is arranged between the rectifier module 5 and the isolation transformer 7, and the energy storage and conversion power unit is connected to the rectifier module through a circuit breaker;

[0040] Continue to refer Figure 2 In the figure, mark 1 is the inductor L load and resistor R load The load is connected in series; marks 2 to 4 are three energy storage and flow conversion power units 1, energy storage and flow conversion power unit 2 and energy storage and flow conversion power unit 3. In the figure, J31, J32 and J33 are bypass contactors on each test subsystem, L11, L12 and L13 are the first AC output ports, L21, L22 and L23 are the second AC output ports, C1, C2 and C3 are DC filter capacitors, L1, L2 and L3 are DC filter inductors, J21, J22 and J23 are DC main contactors, R1, R2 and R3 are DC pre-charging resistors, J11, J12 and J13 are DC pre-charging contactors, QF1, QF2 and QF3 are circuit breakers, Vdc+ and Vdc- are the positive and negative poles of the DC side of the power unit; in the figure, RB1, RB2 and RB3 in mark 5 are three uncontrolled rectifier modules to provide DC power supply; K1, K2 and K3 in mark 6 are three remote control contactors; T1, T2 and T3 in mark 7 are three isolation transformers; mark 8 is the AC power supply V AC . In the figure, all functional units are connected to the control circuit through communication lines to monitor the status of each functional unit and control the corresponding functional unit according to the control instructions. For example, turning on or off the isolation transformer, contactor, etc. It should be noted that the control switch in the present disclosure includes the bypass contactor, DC main contactor, circuit breaker, pre-charging contactor and remote control contactor as described above.

[0041] It can be understood that the test system in the present application can test multiple cascaded energy storage and current conversion power units at the same time, and by setting the working state of the control switch in the control circuit, the test system can control the number of connected energy storage and current conversion power units.

[0042] In some embodiments, the working mode includes at least one of the following: polarity reversal mode, low current mode and high current mode; each of the test subsystems includes an energy storage and conversion power unit, and the control circuit is also used to control multiple energy storage and conversion power units to perform high current mode tests at the same time, and to control each energy storage and conversion power unit to perform polarity reversal mode tests and low current mode tests respectively. When performing the polarity reversal mode test, the control circuit is also used to connect the load unit to the first test subsystem of the test system by setting the working state of the control switch; enable the polarity reversal unit so that the positive and negative poles of the rectifier module are reversely connected to the positive and negative poles of the energy storage and conversion power unit to verify the polarity reversal performance of the energy storage and conversion power unit in the first test subsystem; obtain the polarity reversal test result of the energy storage and conversion power unit in the first test subsystem through the interactive interface of the control circuit. The polarity reverse connection mode is tested on the remaining N-1 energy storage and conversion power units in the test subsystems in turn, and the polarity reverse connection test results of the corresponding energy storage and conversion power units in the remaining N-1 test subsystems are obtained through the interactive interface of the control circuit.

[0043] like Figure 3 As shown, when performing the reverse polarity test, the output positive pole of the uncontrolled rectifier module RB1 is connected to the DC input negative pole Vdc- of the energy storage inverter power unit 1 by a cable, and the output negative pole of the uncontrolled rectifier module RB1 is connected to the DC input positive pole Vdc+ of the energy storage inverter power unit 1 by a cable. If the human-machine interface (touch screen) of the control circuit displays the alarm message "Energy storage inverter power unit 1 battery polarity is reversed" at this time, it indicates that the reverse polarity test of the energy storage inverter power unit 1 has passed.

[0044] Then, the output positive pole of the uncontrolled rectifier module RB2 is connected to the DC input negative pole Vdc- of the energy storage conversion power unit 2 by a cable, and the output negative pole of the uncontrolled rectifier module RB2 is connected to the DC input positive pole Vdc+ of the energy storage conversion power unit 2 by a cable. If the touch screen displays the alarm message "Energy storage conversion power unit 2 battery polarity is reversed" at this time, it indicates that the reverse polarity test of the energy storage conversion power unit 2 has passed.

[0045] Afterwards, the output positive pole of the uncontrolled rectifier module RB3 is connected to the DC input negative pole Vdc- of the energy storage inverter power unit 3 by a cable, and the output negative pole of the uncontrolled rectifier module RB3 is connected to the DC input positive pole Vdc+ of the energy storage inverter power unit 3 by a cable. If the touch screen displays the alarm message "Energy storage inverter power unit 3 battery polarity is reversed" at this time, it indicates that the reverse polarity test has passed. After the three energy storage inverter power units have completed the battery polarity reversal, a small current test is performed. Among them, for the reverse polarity, the polarity reversal unit ( Figure 2 The process is completed as shown in the figure, and the control circuit performs corresponding instruction control.

[0046] It can be understood that, through the polarity reversal unit in the control circuit and the corresponding operation control, the polarity reversal test can be implemented on the energy storage conversion power unit in the test system in turn. The introduction of the polarity reversal test enhances the safety of the unit and prevents the danger that may be caused by incorrect connection.

[0047] In some embodiments, when performing the test of the small current mode, the control circuit is also used to connect the load unit to the first test subsystem of the test system by setting the working state of the control switch; by setting the working states of the contactor and the circuit breaker in the first test subsystem, the energy storage conversion power unit in the first test subsystem operates in a first preset current; and obtain the small current test result of the energy storage conversion power unit in the first test subsystem through the interactive interface of the control circuit. When the polarity reversal mode test of N energy storage conversion power units in N test subsystems is fully passed, the control circuit enters the test of the small current mode; when the small current mode test of N energy storage conversion power units in N test subsystems is fully passed, the control circuit enters the test of the large current mode.

[0048] like Figure 3 As shown, when conducting a low current mode test, first correctly connect the DC input of the energy storage conversion power unit to the output of the uncontrolled rectifier module, that is, the output positive pole of the uncontrolled rectifier module RB1 and the DC input positive pole Vdc+ of the energy storage conversion power unit 1 are connected by a cable, and the output negative pole of the uncontrolled rectifier module RB1 and the DC input negative pole Vdc- of the energy storage conversion power unit 1 are connected by a cable; connect the AC output L11 of the energy storage conversion power unit 1 to the top of the load by a cable, connect the AC output L21 of the energy storage conversion power unit 1 to the AC output L12 of the energy storage conversion power unit 2, connect the AC output L22 of the energy storage conversion power unit 2 to the AC output L13 of the energy storage conversion power unit 3, and connect the AC output L23 of the energy storage conversion power unit 3 to the bottom of the load by a cable.

[0049] The low current test of the energy storage conversion power unit 1 is as follows:

[0050] Close the DC circuit breaker QF1 of the energy storage conversion power unit 1, and control the closing of the DC contactor K1 on the touch screen of the control circuit, and close the bypass contactors J32 and J33 of the energy storage conversion power units 2 and 3. After that, set the target current 20A of the energy storage conversion power unit 1 on the touch screen of the control circuit, click the "Start" button, wait for the energy storage conversion power unit 1 to run stably and the touch screen shows that its sampled current is stable at 20A±0.1A, which indicates that the control logic of the energy storage conversion power unit 1 is in line with expectations, and click the "Stop" button on the touch screen.

[0051] The low current test of the energy storage conversion power unit 2 is as follows:

[0052] Close the DC circuit breaker QF2 of the energy storage conversion power unit 2, control the closing of the DC contactor K2 on the touch screen, close the bypass contactors J31 and J33 of the energy storage conversion power units 1 and 3, and separate the bypass contactor J32 of the energy storage conversion power unit 2. After that, set the target current 20A of the energy storage conversion power unit 2 on the touch screen, click the "Start" button, wait for the energy storage conversion power unit 2 to run stably and the touch screen shows that its sampled current is stable at 20A±0.1A, which indicates that the control logic of the energy storage conversion power unit 2 is in line with expectations, and click the "Stop" button on the touch screen.

[0053] The low current test of the energy storage conversion power unit 1 is as follows:

[0054] Close the DC circuit breaker QF3 of the energy storage conversion power unit 3, control the closing of the DC contactor K3 on the touch screen, close the bypass contactors J31 and J32 of the energy storage conversion power units 1 and 2, and separate the bypass contactor J33 of the energy storage conversion power unit 3. After that, set the target current 20A of the energy storage conversion power unit 3 on the touch screen, click the "Start" button, wait for the energy storage conversion power unit 3 to run stably and the touch screen shows that its sampled current is stable at 20A±0.1A, which indicates that the control logic of the energy storage conversion power unit 3 is in line with expectations, and click the "Stop" button on the touch screen.

[0055] Finally, the bypass contactor J31 of the energy storage conversion power unit 1 is controlled to be separated, the bypass contactor J32 of the energy storage conversion power unit 2 is separated, and the bypass contactor J33 of the energy storage conversion power unit 3 is separated.

[0056] In some embodiments, when performing the high current mode test, the control circuit is also used to, by setting the working state of the control switch, enable N energy storage and conversion power units in the N test systems to be cascaded, and at the same time enable the load unit to be connected to the test system; by setting the working state of the corresponding contactor and the circuit breaker in each of the test subsystems, enable N energy storage and conversion power units in the N test subsystems to operate in a second preset current; and obtain the high current test results of the N energy storage and conversion power units in the test system through the interactive interface of the control circuit.

[0057] like Figure 3 As shown, the control circuit confirms that the primary main circuit wiring of the three energy storage and conversion power units is correct and the bypass contactors are separated. Click the "Standby" button on the touch screen and observe the information of each unit on the touch screen. If the information of the three energy storage and conversion power units is displayed in the order of DC pre-charging contactor J1 closing, DC main contactor J2 closing, DC pre-charging contactor J1 separation, and "Standby Success" indicator light, the experiment can continue, otherwise the response fault is checked according to the unit information. After that, set the target current of 400A on the touch screen, press the "Start" button, observe that the cooling fan of the unit body is running, the "Run" indicator light is on, and the sampling current gradually increases and finally stabilizes at 400A±1A. After the experiment runs stably for 2 hours, click the "Stop" button on the touch screen to indicate that the aging experiment has been completed.

[0058] It should be understood that the present invention tests multiple energy storage inverter power units simultaneously, which improves production efficiency, reduces testing time, and speeds up the delivery of cascaded high-voltage energy storage systems. Secondly, it reduces the demand for AC power supplies, loads, and battery packs, reduces the cost of test equipment, and makes the testing process more economical and efficient. In addition, through preset test steps and processes, the accuracy and reliability of the test are improved, ensuring product quality. Finally, through aging tests that simulate actual operating conditions, the performance of the energy storage inverter power unit can be more accurately verified to ensure its reliability and stability in actual applications.

[0059] The present disclosure also provides an energy storage and current conversion power unit, which is tested using the test system as described above.

[0060] The present disclosure also provides a test method for an energy storage conversion power unit, which is applied to the test system as described above, and the test method includes: powering on the energy storage conversion power unit to be tested; in response to a first test instruction, setting the working state of a control switch so that the energy storage conversion power unit to be tested is in a first working mode corresponding to the first test instruction for testing; if each of the energy storage conversion power units to be tested is in a normal state under the first working mode, then in response to a second test instruction, setting the working state of a control switch so that multiple energy storage conversion power units to be tested are simultaneously in a second working mode corresponding to the second test instruction for testing. Please refer to the above for a detailed description of the test method, which will not be repeated here.

[0061] Generally, various embodiments of the present disclosure may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. Certain aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be executed by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of the present disclosure are shown and described as block diagrams, flow charts, or using some other graphical representations, it should be understood that, as non-limiting examples, the blocks, devices, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuits or logic, general hardware or controllers or other computing devices, or some combination thereof.

[0062] The present disclosure also provides at least one computer program product tangibly stored on a non-transient computer-readable storage medium. The computer program product includes computer executable instructions, such as instructions included in program modules, which are executed in a device on a target real or virtual processor. Typically, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. In various embodiments, the functions of program modules can be combined or separated between program modules as needed. Machine executable instructions for program modules can be executed in local or distributed devices. In distributed devices, program modules can be located in local and remote storage media.

[0063] The program code for executing the disclosed method can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing equipment so that when the program code is executed by the processor or controller, the function / operation specified in the flow chart and / or block diagram is realized. The program code can be executed completely on the machine as an independent software package, partially on the machine, partially on the machine, partially on a remote machine, partially on a remote machine, or all on a remote machine or server.

[0064] In the context of the present disclosure, computer program codes or related data may be carried by any appropriate carrier to enable a device, apparatus or processor to perform various processes and operations as described above. Examples of carriers include signals, computer readable media, etc.

[0065] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or apparatuses, or any suitable combination of the foregoing. More specific examples of computer readable storage media include an electrical connection with one or more wires, a portable computer floppy disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0066] In addition, although the operations are described in a specific order, this should not be understood as requiring the specific order or sequence shown to be performed, or performing all the operations shown, to obtain the desired result. In some cases, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these details should not be interpreted as limitations on the scope of the present disclosure, but can be interpreted as descriptions of features specific to a particular embodiment. Certain features described in the context of a separate embodiment may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0067] Although the disclosure has been described in language specific to structural features and / or methodological acts, it should be understood that the disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

[0068] It should be fully understood that the use of personally identifiable information should be subject to privacy policies and practices generally recognized as meeting or exceeding industry or government requirements for maintaining user privacy. In particular, personally identifiable information data should be managed and processed to minimize the risk of inadvertent or unauthorized access or use, and the nature of authorized use should be clearly indicated to users.

Claims

1. A testing system, characterized in that: The test system comprises: N test subsystems and control circuits, where N is an integer greater than 1; The control circuit is used for, in response to a control instruction, setting the working state of a control switch in the control circuit so that the test system is in a working mode corresponding to the control instruction.

2. The test system according to claim 1, characterized in that: The working mode includes at least one of the following: polarity reverse connection mode, low current mode and high current mode; Each of the test subsystems includes an energy storage and current conversion power unit, and the control circuit is also used to control a plurality of the energy storage and current conversion power units to perform a large current mode test at the same time. And control each of the energy storage and current conversion power units to respectively perform the polarity reverse connection mode test and the low current mode test.

3. The test system according to claim 2, characterized in that: The control circuit includes a polarity reversal unit; each of the test subsystems also includes a rectifier module, a contactor and an isolation transformer, the contactor is arranged between the rectifier module and the isolation transformer, and the energy storage and current conversion power unit is connected to the rectifier module through a circuit breaker; When performing the test of the polarity reversal mode, the control circuit is further used to: By setting the working state of the control switch, the load unit is connected to the first test subsystem of the test system; Activate the polarity reversal unit so that the positive and negative poles of the rectifier module are reversely connected to the positive and negative poles of the energy storage and conversion power unit to verify the polarity reversal performance of the energy storage and conversion power unit in the first test subsystem; The polarity reverse connection test result of the energy storage and current conversion power unit in the first test subsystem is obtained through the interactive interface of the control circuit.

4. The test system according to claim 3, characterized in that: When performing the low current mode test, the control circuit is further used to: By setting the working state of the control switch, the load unit is connected to the first test subsystem of the test system; By setting the working states of the contactor and the circuit breaker in the first test subsystem, the energy storage and current conversion power unit in the first test subsystem operates in a first preset current; The low current test result of the energy storage and current conversion power unit in the first test subsystem is obtained through the interactive interface of the control circuit.

5. The test system according to claim 3, characterized in that: When performing the high current mode test, the control circuit is further used to: By setting the working state of the control switch, N energy storage and current conversion power units in the N test systems are cascaded, and the load unit is connected to the test system; By setting the working state of the corresponding contactor and the circuit breaker in each of the test subsystems, the N energy storage and current conversion power units in the N test subsystems are operated in a second preset current; The high current test results of the N energy storage and current conversion power units in the test system are obtained through the interactive interface of the control circuit.

6. The test system according to claim 3, characterized in that: The control circuit is also used to test the polarity reverse mode of the remaining N-1 energy storage and conversion power units in the test subsystems in turn, and obtain the polarity reverse test results of the corresponding energy storage and conversion power units in the remaining N-1 test subsystems through the interactive interface of the control circuit.

7. The test system according to claim 4, characterized in that: The control circuit is also used to: The energy storage and conversion power units in the remaining N-1 test subsystems are tested in low current mode in turn, and the low current test results of the corresponding energy storage and conversion power units in the remaining N-1 test subsystems are obtained through the interactive interface of the control circuit.

8. A test system as claimed in any one of claims 2 to 7, characterized in that: When the polarity reverse connection mode tests of N energy storage and current conversion power units in N test subsystems are all passed, the control circuit enters the low current mode test; When all the tests of the small current mode of the N energy storage and conversion power units in the N test subsystems pass, the control circuit enters the test of the large current mode.

9. An energy storage and current conversion power unit, characterized in that: The test is performed using a test system as described in any one of claims 1 to 7.

10. A method for testing an energy storage and current conversion power unit, characterized in that: Applied to the test system as claimed in any one of claims 1 to 7, the test method comprises: Power on the energy storage and current conversion power unit to be tested; In response to a first test instruction, by setting the working state of the control switch, the energy storage and current conversion power unit to be tested is placed in a first working mode corresponding to the first test instruction for testing; If each of the energy storage conversion power units to be tested is in a normal state under the first working mode, then in response to the second test instruction, the working state of the control switch is set so that multiple energy storage conversion power units to be tested are simultaneously in the second working mode corresponding to the second test instruction for testing.

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