Energy storage valve sub-module testing method, device and system and computer equipment

Abstract

The invention relates to an energy storage valve sub-module testing method, device and system, computer equipment, a storage medium and a computer program product, an accompanying test sub-module and a test object sub-module are adopted to build a twin trawling architecture, the accompanying test sub-module is utilized to charge the test object sub-module, and charging state parameters of the test object sub-module in the charging process are obtained; and analyzing to obtain the operation state of the test sample sub-module. Through the scheme, the actual operation condition of the energy storage valve sub-module can be simulated, before the energy storage valve sub-module is put into use, operation detection is carried out on the energy storage valve sub-module, the probability that the fault energy storage valve sub-module is put into the energy storage system is reduced, and the operation reliability of the energy storage valve sub-module is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a method, device, system, computer equipment, storage medium and computer program product for testing an energy storage valve submodule. Background Art

[0002] Energy storage provides frequency regulation and peak regulation in all aspects of power generation, transmission, distribution and use, and plays a role in stabilizing the frequency of the power grid, alleviating grid congestion, and improving the flexibility of power generation and use. The cascade energy storage system has the advantages of modular design, high capacity utilization, high conversion efficiency, fast dynamic response, low harmonic content, and stable system operation. It has become a current research hotspot and has broad application prospects.

[0003] The core component of the cascade energy storage system is the energy storage valve submodule that integrates the power module and the battery module. The reliable operation of the energy storage valve submodule is of great significance to the high reliability of the energy storage system and even the power system. However, in the related art, the operation reliability of the energy storage valve submodule is low. Summary of the invention

[0004] Based on this, it is necessary to provide a method, device, system, computer equipment, storage medium and computer program product for testing an energy storage valve submodule.

[0005] A method for testing an energy storage valve submodule comprises: controlling a companion test submodule to perform direct current charging on a sample submodule, wherein the sample submodule comprises a first power module and a first energy storage module connected to each other, the companion test submodule comprises a second power module and a second energy storage module connected to each other, a high voltage end of the first power module is connected to a high voltage end of the second power module, and a low voltage end of the first power module is connected to a low voltage end of the second power module; obtaining charging state parameters of the sample submodule during charging; and determining the operating state of the sample submodule according to the charging state parameters.

[0006] The above scheme uses a test submodule and a test product submodule to build a towing architecture, uses the test submodule to charge the test product submodule, obtains the charging state parameters of the test product submodule during the charging process, and thus analyzes the operating state of the test product submodule. Through this scheme, the actual operating conditions of the energy storage valve submodule can be simulated, and the energy storage valve submodule can be tested for operation before it is put into use, thereby reducing the probability of a faulty energy storage valve submodule being put into the energy storage system and improving the operating reliability of the energy storage valve submodule.

[0007] In some embodiments, the controlling the accompanying test submodule to perform DC charging on the sample submodule includes: when the voltage difference between the accompanying test submodule and the sample submodule is greater than a first preset threshold, controlling the accompanying test submodule to charge the sample submodule in a forward mode; when the voltage difference between the accompanying test submodule and the sample submodule is less than a second preset threshold, controlling the accompanying test submodule to charge the sample submodule in a reverse mode; wherein the first preset threshold is greater than or equal to the second preset threshold.

[0008] In the above scheme, when the voltage of the accompanying test submodule is greater than the voltage of the test submodule, or the voltage of the accompanying test submodule is less than the voltage of the test submodule, the test submodule can be charged by the accompanying test submodule, thereby improving the charging test reliability of the test submodule.

[0009] In some embodiments, controlling the accompanying test submodule to charge the sample submodule in forward mode includes: controlling the sample submodule to enter a charging mode, and controlling the power switch device of the accompanying test submodule to be turned on in rotation, so as to charge the sample submodule in forward mode through the second energy storage module.

[0010] The above scheme controls the power switch devices of the companion test submodule to be turned on in rotation, so as to maintain a continuous and relatively stable DC current to charge the test submodule.

[0011] In some embodiments, the high voltage end of the first power module is connected to the high voltage end of the second power module through an inductor, and the control of the accompanying test submodule to charge the sample submodule in reverse mode includes: controlling the accompanying test submodule to charge the inductor; controlling the sample submodule to enter a charging mode, and controlling the power switching device of the accompanying test submodule to be turned on in rotation, so as to charge the sample submodule in reverse mode through the electric energy stored in the inductor and the second energy storage module.

[0012] In the above scheme, when the voltage of the companion test submodule is lower than the voltage of the sample submodule, the sample submodule is first controlled to charge the inductor, and then the electric energy of the inductor and the electric energy stored in the second energy storage module are transmitted to the sample submodule, thereby achieving a voltage boosting effect and maintaining a continuous and relatively stable DC current to charge the sample submodule.

[0013] In some embodiments, the controlling the accompanying test submodule to DC charge the sample submodule includes: inputting a switch control signal with any duty cycle and frequency to the sample submodule, and inputting a switch control signal with a fixed frequency to the accompanying test submodule to control the accompanying test submodule to DC charge the sample submodule.

[0014] In the above scheme, the test submodule can perform charging test with a switch control signal of any duty cycle and frequency, thereby completing charging test from 0 to the highest operating frequency and any duty cycle, enriching the test scenarios of the test submodule.

[0015] In some embodiments, the energy storage valve submodule testing method further includes: adjusting the duty cycle of the switch control signal of the accompanying test submodule according to the current sampling value of the first end of the test submodule and a preset reference current.

[0016] In the above scheme, when the companion test submodule charges the submodule by switching on and off with a fixed-frequency switch control signal, the duty cycle of the switch control signal can be adjusted in real time in combination with the actual feedback current sampling value, thereby improving the test reliability of the test submodule.

[0017] In some embodiments, the charging state parameter includes at least one of a current parameter, a voltage parameter, and a temperature parameter.

[0018] In the above scheme, the charging state parameter includes at least one of the current parameter, the voltage parameter, and the temperature parameter, so that the corresponding test content of the test submodule can be completed according to at least one of the current parameter, the voltage parameter, and the temperature parameter, which can effectively enrich the test content.

[0019] In some embodiments, determining the operating state of the sample submodule according to the charging state parameter includes: determining the voltage stress state and the current stress state of the sample submodule during the charging process according to the voltage parameter and the current parameter.

[0020] The above scheme can implement voltage stress testing according to the voltage parameters of the test submodule during the charging process, and implement current stress testing through current parameters, so as to determine the voltage stress state and current stress state of the energy storage valve submodule, and improve the operational reliability of the test submodule when it is put into use.

[0021] In some embodiments, the current fluctuation state and the temperature rise state of the test submodule are determined according to the current parameter and the temperature parameter.

[0022] The above scheme can implement a current fluctuation state test according to the current parameters of the test submodule during the charging process, and implement a temperature rise test through the temperature parameters, thereby determining the current fluctuation state and temperature rise state of the energy storage valve submodule, and improving the operational reliability of the test submodule when it is put into use.

[0023] In some embodiments, the energy storage valve submodule testing method further includes: when the accompanying test submodule has a need for power replenishment, controlling the accompanying test submodule to perform power replenishment.

[0024] The above scheme can provide power replenishment for the accompanying test submodule, whether before or during the test, if the accompanying test submodule needs power replenishment, which can effectively increase the test time of the energy storage valve submodule.

[0025] In some embodiments, the energy storage valve submodule testing method further includes: controlling the test submodule to discharge the companion test submodule; obtaining discharge state parameters of the test submodule during the discharge process; and determining the operating state of the test submodule according to the discharge state parameters.

[0026] The above scheme can also realize the discharge test of the test submodule by controlling the test submodule to charge the companion test submodule, thereby further improving the operational reliability of the test submodule when it is put into use.

[0027] A test device for an energy storage valve submodule comprises: a charging control module, used to control a companion test submodule to perform direct current charging on a sample submodule, wherein the sample submodule comprises a first power module and a first energy storage module connected to each other, the companion test submodule comprises a second power module and a second energy storage module connected to each other, the high voltage end of the first power module is connected to the high voltage end of the second power module, and the low voltage end of the first power module is connected to the low voltage end of the second power module; a parameter acquisition module, used to acquire charging state parameters of the sample submodule during the charging process; the charging state parameters are used to determine the operating state of the sample submodule.

[0028] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned energy storage valve submodule testing method when executing the computer program.

[0029] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the energy storage valve submodule testing method.

[0030] A computer program product includes a computer program, which implements the steps of the above-mentioned energy storage valve submodule testing method when executed by a processor.

[0031] A storage valve submodule testing system comprises a test submodule, a companion test submodule and a processor, wherein the test submodule comprises a first power module and a first energy storage module connected to each other, the companion test submodule comprises a second power module and a second energy storage module connected to each other, the high voltage end of the first power module is connected to the high voltage end of the second power module, the low voltage end of the first power module is connected to the low voltage end of the second power module, the control end of the first power module and the control end of the second power module are respectively connected to the processor, and the processor is used to test the test submodule according to the above-mentioned energy storage valve submodule testing method.

[0032] The above scheme uses a test submodule and a test product submodule to build a towing architecture, uses the test submodule to charge the test product submodule, obtains the charging state parameters of the test product submodule during the charging process, and thus analyzes the operating state of the test product submodule. Through this scheme, the actual operating conditions of the energy storage valve submodule can be simulated, and the energy storage valve submodule can be tested for operation before it is put into use, thereby reducing the probability of a faulty energy storage valve submodule being put into the energy storage system and improving the operating reliability of the energy storage valve submodule.

[0033] In some embodiments, the energy storage valve submodule testing system further includes an inductor, and the high voltage end of the first power module is connected to the high voltage end of the second power module through the inductor.

[0034] In the above scheme, an inductor is arranged between the high-voltage ends of the first power module and the second power module, so that when the voltage of the companion test submodule is low, the test submodule can still be charged through inductive energy storage, thereby improving the charging reliability of the companion test submodule for charging the test submodule.

[0035] In some embodiments, the energy storage valve submodule testing system further includes an energy replenishment circuit, and the energy replenishment circuit is connected to the second energy storage module.

[0036] In the above scheme, an energy replenishment circuit is also provided in the energy storage valve submodule test system. By replenishing power for the second energy storage module of the accompanying test submodule through the energy replenishment circuit, the endurance time of the accompanying test submodule can be effectively improved, so that the energy storage valve submodule can be tested for a long time.

[0037] In some embodiments, the energy compensation circuit includes a switch device and a current source, and the current source is connected to the second energy storage module through the switch device.

[0038] In the above scheme, the energy replenishment circuit specifically includes a switch device and a current source connected in series, has a simple structure, and can effectively save the volume and circuit cost of the energy storage valve submodule test system.

[0039] In some embodiments, the first power module includes a first power unit and a first capacitor connected in parallel, a high voltage end of the first power unit is connected to a high voltage end of the second power module, and a low voltage end of the first power unit is connected to a low voltage end of the second power module;

[0040] And / or, in some embodiments, the second power module includes a second power unit and a second capacitor in parallel, the high voltage end of the second power unit is connected to the high voltage end of the first power module, and the low voltage end of the second power unit is connected to the low voltage end of the first power module.

[0041] In the above scheme, the first power module and the second power module both include power cells and capacitors. By building this test architecture, it is possible to test an energy storage valve submodule of the type in which the power module includes a power cell and a capacitor, thereby improving the operating reliability of this type of energy storage valve submodule.

[0042] In some embodiments, the first power module includes a full-bridge power module or a half-bridge power module, and the second power module includes a full-bridge power module or a half-bridge power module.

[0043] In the above scheme, the test submodule and the accompanying test submodule can be a half-bridge structure and a full-bridge structure respectively, which can realize the pair-drag test of the energy storage valve submodule under the half-bridge structure, or the pair-drag test of the energy storage valve submodule under the full-bridge structure, and has a wide range of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0045] Figure 1 This is a schematic flow chart of a method for testing an energy storage valve submodule in some embodiments of the present application;

[0046] Figure 2 This is a schematic diagram of the structure of the energy storage valve submodule test system in some embodiments of the present application;

[0047] Figure 3 A schematic diagram of a flow chart of a method for testing an energy storage valve submodule in some other embodiments of the present application;

[0048] Figure 4 A schematic flow chart of a method for testing an energy storage valve submodule in some other embodiments of the present application;

[0049] Figure 5 This is a schematic diagram of the equivalent circuit structure of the energy storage valve submodule test system in some embodiments of the present application;

[0050] Figure 6 This is a schematic diagram of the structure of the energy storage valve submodule test system in some other embodiments of the present application;

[0051] Figure 7 A schematic diagram of an inductor current waveform during forward mode charging in some embodiments of the present application;

[0052] Figure 8 A schematic diagram of an inductor current waveform during reverse mode charging in some embodiments of the present application;

[0053] Fig. 9A schematic diagram of switch control signal injection in some embodiments of the present application;

[0054] Fig.10 This is a flow chart of a method for testing an energy storage valve submodule in some further embodiments of the present application;

[0055] Fig.11 A schematic diagram of a flow chart of a method for testing an energy storage valve submodule in some other embodiments of the present application;

[0056] Fig.12 This is a schematic diagram of the structure of the energy storage valve submodule testing device in some embodiments of the present application;

[0057] Fig.13 This is a schematic diagram of the structure of the energy storage valve submodule testing device in some other embodiments of the present application;

[0058] Fig.14 This is a schematic diagram of the structure of the energy storage valve submodule testing device in some other embodiments of the present application;

[0059] Fig.15 This is a structural schematic diagram of an energy storage valve submodule testing device in some further embodiments of the present application;

[0060] Fig.16 This is a schematic diagram of the internal structure of a computer device in some embodiments of the present application;

[0061] Fig.17 This is a schematic diagram of the structure of the energy storage valve submodule test system in some other embodiments of the present application;

[0062] Fig.18 This is a schematic diagram of the structure of the energy storage valve submodule test system in some embodiments of the present application;

[0063] Fig.19 This is a schematic diagram of the structure of the energy storage valve submodule test system in some other embodiments of the present application;

[0064] Fig. 20 This is a schematic diagram of the structure of the energy storage valve submodule testing system in some further embodiments of the present application. DETAILED DESCRIPTION

[0065] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0067] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0068] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0069] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0070] At present, from the perspective of the development of the market situation, high-voltage direct-mounted energy storage has gradually been developed and applied because of its highly modular structure and ability to meet the needs of high efficiency, high reliability, economy and safety. In the high-voltage direct-mounted energy storage system, the core part is the energy storage valve submodule. Each energy storage valve submodule includes a power part and an energy storage part. Multiple energy storage valve submodules are connected to form an energy storage system. Typically, energy storage valve submodules are cascaded to form a cascade energy storage system. Therefore, the reliable operation of the energy storage valve submodule directly affects the operation of the energy storage system. How to improve the operational reliability of the energy storage valve submodule is particularly important.

[0071] In addition to the operational failure of the energy storage valve submodule during use due to power grid failure, improper operation or component aging, the energy storage valve submodule itself may have a fault before being connected to the energy storage system. Therefore, in order to improve the operational reliability of the energy storage submodule and reduce the failure rate of the energy storage valve submodule connected to the energy storage system, it is particularly important to test the energy storage valve submodule before connecting it to the energy storage system.

[0072] Based on the above considerations, the technical solution of the present application provides a method for testing an energy storage valve sub-module. When conducting a test, two energy storage valve sub-modules of the same type are selected, one of which is used as a companion test sub-module and the other as a test sub-module. The two energy storage valve sub-modules are connected to form a pair-drag architecture. The companion test sub-module is used to charge the test sub-module, and the charging status parameters of the test sub-module are obtained during the charging process. Finally, the operating status of the test sub-module is determined based on the charging status parameters.

[0073] Through the above method, the actual operating conditions of the energy storage valve submodule can be simulated. Before the energy storage valve submodule is put into use, the energy storage valve submodule is tested for operation to determine whether the energy storage valve submodule has a fault, thereby reducing the probability of a faulty energy storage valve submodule being put into the energy storage system and improving the operational reliability of the energy storage valve submodule.

[0074] Furthermore, during the test, the test submodule can also discharge to the companion test submodule, and accordingly, the discharge state parameters of the test submodule are obtained at this time, and the operating state of the test submodule is determined by the discharge state parameters, thereby completing the discharge test of the test submodule. This can further reduce the probability of a faulty energy storage valve submodule being put into the energy storage system, and further improve the operating reliability of the energy storage valve submodule.

[0075] The energy storage valve submodule provided in the present application is applied in an energy storage system. Specifically, the energy storage valve submodule is applied in an electrochemical energy storage system, that is, an energy storage system that stores, releases and manages energy through batteries. Furthermore, the type of electrochemical energy storage system is not unique, as long as it is an electrochemical energy storage system that needs to be built using an energy storage valve submodule. For example, in a more detailed embodiment, the electrochemical energy storage system includes a high-voltage direct-mounted energy storage system. In order to facilitate understanding of the technical solution of the present application, the following embodiments can all be understood as the energy storage valve submodule being applied in a high-voltage direct-mounted energy storage system.

[0076] See also Figure 1 , a method for testing an energy storage valve submodule includes steps 102 , 104 and 106 .

[0077] Step 102, controlling the accompanying test submodule to perform direct current charging on the sample submodule.

[0078] Specifically, the test submodule includes a first power module and a first energy storage module connected to each other, and the accompanying test submodule includes a second power module and a second energy storage module connected to each other, the high voltage end of the first power module is connected to the high voltage end of the second power module, and the low voltage end of the first power module is connected to the low voltage end of the second power module. The accompanying test submodule is an energy storage valve submodule used to provide charging power or store and release power for the energy storage valve submodule to be tested. The test submodule is the energy storage valve submodule that needs to be tested, that is, the energy storage valve submodule to be tested.

[0079] Furthermore, in another embodiment, in order to improve the charging reliability when the companion test submodule charges the sample submodule, so that the companion test submodule can still charge the sample submodule when the voltage is low, even lower than the voltage of the sample submodule, it can be combined with reference to Figure 2 , the high voltage end (not shown) of the second power module of the companion test submodule 204 is connected to the high voltage end (not shown) of the first power module of the test product submodule 202 through the inductor L.

[0080] It should be pointed out that in the actual test process, in the towing architecture built by the two energy storage valve submodules, the definitions of the test submodule and the accompanying test submodule are not unique. If both energy storage valve submodules need to be tested, any one of the energy storage valve submodules can be used as the test submodule, and the other energy storage valve submodule can be tested as the accompanying test submodule. After the test of the test submodule is completed, it is used as the accompanying test submodule, and the previous accompanying test submodule is used as the test submodule, and the test of the other energy storage valve submodule is switched.

[0081] The energy storage valve submodule includes an energy storage module and a power module. During the actual test process, the processor only needs to send control signals to the second energy storage module and the second power module of the accompanying test submodule, and the first energy storage module and the first power module of the sample submodule, so that the electric energy stored in the second energy storage module of the accompanying test submodule is transmitted to the sample submodule, thereby realizing the charging of the sample submodule.

[0082] It can be understood that the specific form of the processor is not unique. In one embodiment, the processor can be an additional setting of the independent energy storage valve submodule, which can be an MCU (Microcontroller Unit), a CPU (Central Processing Unit), etc. In another embodiment, the processor can also be integrated into the control board of the energy storage valve submodule, which is not limited to the specific form and can be selected in combination with actual needs.

[0083] Step 104, obtaining charging state parameters of the test submodule during the charging process.

[0084] Specifically, the charging state parameter is a parameter related to the charging state of the test submodule during the charging process. It can be a charging-related parameter applied to the test submodule during the test process, or a parameter that changes with the change of charging time during the test process. There is no specific limitation, and it can be selected according to actual needs.

[0085] It is understandable that there is not only one way to obtain the charging state parameters. It can be detected by the detection device of the test submodule itself, and the processor and the test submodule exchange information to obtain it, or it can be acquired by setting an additional state parameter collector in the test submodule. There is no specific limitation, and it can be selected in combination with the type of actual charging state parameters. For example, in a more detailed embodiment, the processor can exchange information with the battery management system of the energy storage module to obtain the temperature parameters, charging current parameters, and charging voltage parameters of the energy storage module.

[0086] Step 106, determining the operating state of the test submodule according to the charging state parameter.

[0087] Specifically, after the processor obtains the charging state parameters, it will analyze the charging state parameters to determine the current operating state of the test submodule, that is, to determine whether the test submodule is operating normally. If it is determined that the test submodule is operating normally, the test submodule can be put into use in the energy storage system normally. If the test submodule is not operating normally, the staff can be informed by outputting alarm prompt information, so that the staff can perform maintenance in time.

[0088] It should be noted that the operating state of the test submodule is not unique, and the operating state obtained by the final analysis may be different depending on the type of charging state parameter obtained. For example, in a more detailed embodiment, the operating state may include state parameters related to voltage, current or temperature changes during the charging process.

[0089] It can be understood that in one embodiment, when the energy storage valve submodule is tested, the processor can also push the operating status parameters to the staff, which can be implemented by displaying on the display terminal or voice prompt information, etc., which is not limited here. The staff will then analyze the displayed charging status parameters and finally determine the operating status of the test submodule, thereby determining whether the test submodule is suitable for use in the energy storage system.

[0090] The above scheme uses a test submodule and a test product submodule to build a towing architecture, uses the test submodule to charge the test product submodule, obtains the charging state parameters of the test product submodule during the charging process, and thus analyzes the operating state of the test product submodule. Through this scheme, the actual operating conditions of the energy storage valve submodule can be simulated, and the energy storage valve submodule can be tested for operation before it is put into use, thereby reducing the probability of a faulty energy storage valve submodule being put into the energy storage system and improving the operating reliability of the energy storage valve submodule.

[0091] See also Figure 3 In some embodiments, the energy storage valve submodule testing method further includes step 302 .

[0092] Step 302: When the accompanying test submodule has a need for power replenishment, control the accompanying test submodule to perform power replenishment.

[0093] Specifically, replenishing electricity means replenishing electric energy, that is, charging the accompanying test submodule. In the test method disclosed in the embodiment of the present application, in order to simulate various working conditions of the test submodule as much as possible, the accompanying test submodule is required to charge the test submodule for a longer time. However, the electric energy stored in the energy storage module of the accompanying test submodule may be too low and cannot meet the long-term charging demand. Therefore, the solution of this embodiment needs to control the accompanying test submodule to replenish electricity when the accompanying test submodule has a need for replenishing electricity, so as to realize a long-term operation test.

[0094] It can be understood that there is not only one way to determine whether the accompanying test submodule has a need for additional power. In one embodiment, it can be a charging operation with a preset number of cycles set by the staff before the test begins. One number of cycles includes: the test submodule is correspondingly provided with a plurality of different switch control signals. If the test submodule completes a charging test with each of the set switch control signals, it is considered that a test of one number of cycles is completed. Afterwards, the processor can determine whether the accompanying test submodule has a need for additional power based on the preset number of cycles and the current power of the accompanying test submodule. If the current power can meet the charging requirement of the preset number of cycles, there is no need to supplement power. If the current power does not meet the charging requirement of the preset number of cycles, it is necessary to supplement power for the accompanying test submodule.

[0095] In another embodiment, during the actual test process, the remaining power of the current accompanying test submodule can be detected in real time. When the remaining power does not meet the next charging demand, it is considered that the accompanying test submodule needs to be recharged, and then recharging is started for the accompanying test submodule.

[0096] It should be pointed out that the method of supplementing power for the accompanying test submodule is not unique. In a more detailed embodiment, an external supplementary power device may be connected to the accompanying test submodule to control the on and off of the power switch device of the accompanying test submodule, and the external supplementary power device may be used to charge the accompanying test submodule, thereby realizing the supplementary power operation.

[0097] In another embodiment, a power supply circuit may be built at the accompanying test submodule. During the actual test process, the power supply circuit may be turned on to supply power to the accompanying test submodule in combination with the remaining power of the accompanying test submodule.

[0098] The above scheme can provide power replenishment for the accompanying test submodule, whether before or during the test, if the accompanying test submodule needs power replenishment, which can effectively increase the test time of the energy storage valve submodule.

[0099] See also Figure 4 In some embodiments, step 102 includes step 402 and step 404 .

[0100] Step 402: When the voltage difference between the accompanying test submodule and the sample submodule is greater than a first preset threshold, the accompanying test submodule is controlled to charge the sample submodule in a forward mode.

[0101] Step 404: When the voltage difference between the accompanying test submodule and the sample submodule is less than a second preset threshold, the accompanying test submodule is controlled to charge the sample submodule in a reverse mode.

[0102] Specifically, the first preset threshold is greater than or equal to the second preset threshold. During the test process, the processor can obtain the voltage of the accompanying test submodule and the test product submodule in real time, and determine the charging mode required by the current test product submodule based on the voltage difference between the accompanying test submodule and the test product submodule, and then control the accompanying test submodule to charge the test product submodule in different operating states.

[0103] In the scheme of this embodiment, forward mode charging refers to the process in which the voltage of the accompanying test submodule and the voltage of the test submodule differ greatly, and electric energy is transferred from the accompanying test submodule with a higher voltage to the test submodule with a lower voltage to charge the test submodule. Reverse mode charging refers to the process in which the voltage of the accompanying test submodule is greater than the voltage of the test submodule, but the difference between the two is small, and electric energy is transferred from the accompanying test submodule with a higher voltage to the test submodule with a lower voltage to charge the test submodule (this process may increase with the increase of charging time, and the voltage of the accompanying test submodule will be equal to the voltage of the test submodule); or when the voltage of the accompanying test submodule is less than the low voltage of the test submodule, electric energy is transferred from the accompanying test submodule with a lower voltage to the test submodule with a higher voltage to charge the test submodule.

[0104] It should be noted that the specific values ​​of the first preset threshold and the second preset threshold are not unique, and the two can be set to be the same, for example, both set to 0; or they can be set to be different. For example, in a more detailed embodiment, the first preset threshold can be set to a voltage threshold greater than 0, and the second preset threshold can be set to a voltage threshold less than 0, and the selection can be made in combination with actual needs.

[0105] Through the solution of this embodiment, the entire test system can achieve full energy operation, that is, no matter how much the voltage of the accompanying test submodule is, the accompanying test submodule can realize direct current charging of the test product submodule.

[0106] In the above scheme, when the voltage of the accompanying test submodule is greater than the voltage of the test submodule, or the voltage of the accompanying test submodule is less than the voltage of the test submodule, the test submodule can be charged by the accompanying test submodule, thereby improving the charging test reliability of the test submodule.

[0107] In some embodiments, controlling the accompanying test submodule to charge the sample submodule in forward mode includes: controlling the sample submodule to enter a charging mode, and controlling the power switch devices of the accompanying test submodule to be turned on in rotation, so as to charge the sample submodule in forward mode through the energy storage module of the accompanying test submodule.

[0108] Specifically, taking the example that the accompanying test submodule is not connected to the energy compensation circuit, and an inductor is connected between the accompanying test submodule and the test product submodule, the pair-to-push structure constructed by the accompanying test submodule and the test product submodule can be equivalent to the following: Figure 5 As shown. Among them, u 1 、u 2 is the voltage of the test submodule and the accompanying test submodule, r 1 、r 2 is the internal resistance of the test submodule and the accompanying test submodule, i L is the line resistance, L is the inductance, i L is the inductor current, d 1 d 2 are the duty cycles of the switch control signals of the test submodule and the companion test submodule respectively. According to Kirchhoff’s law, the current steady-state operating point satisfies:

[0109] d 2 u 2 -(r 1 + 2 + l )i L = 1 u 1

[0110] Therefore, in the actual test process, by changing the duty cycle of the switch control signal of the test submodule and the accompanying test submodule, d 2 u 2-(r 1 + 2 + l )i L = 1 u 1 In this case, the electric energy output by the companion test submodule can be equivalently transmitted to the test product submodule to realize the charging operation of the test product submodule.

[0111] It should be pointed out that the method of controlling the test sub-module to enter the charging mode and controlling the power switching devices of the companion test sub-module to rotate and turn on is not unique. It is different due to the different power module structures of the test sub-module and the companion test sub-module. In order to facilitate the understanding of the technical solution of the present application, the half-bridge power module is used as an example for explanation below.

[0112] Please refer to Figure 6 The test submodule includes a first power module 601 and a first energy storage module 602, and the accompanying test submodule includes a second power module 603 and a second energy storage module 604. The structures of the first power module 601 and the second power module 603 can be the same or different, depending on actual needs.

[0113] Figure 6 Taking the first power module 601 and the second power module 603 having the same structure as an example, the first power module 601 includes a power unit and a first capacitor C1. Furthermore, the power unit is a half-bridge structure, including a first power switch device T1 and a second power switch device T2. The common end of the first power switch device T1 and the second power switch device T2 serves as a high-voltage end. Correspondingly, the input end of the first power switch device T1 is connected to the input end of the second power switch device T2, a processor (not shown) and a first end of the inductor L. The output end of the first power switch device T1 is connected to the first end of the first capacitor C1 and the first end of the first energy storage module 602. The output end of the second power switch device T2 serves as a low-voltage end and is connected to the second power module 603. The output end of the second power switch device T2 is also connected to the second end of the first capacitor C1 and the second end of the first energy storage module 602. The control end of the first power switch device T1 and the control end of the second power switch device T2 are respectively connected to the processor (not shown).

[0114] If the first end of the first energy storage module 602 is a positive electrode and the second end of the first energy storage module 602 is a negative electrode, in actual operation: the processor outputs a switch control signal to control the first power switch device T1 to turn on, and the test submodule enters the charging mode. At this time, the processor outputs a switch control signal to control the two power switch devices of the accompanying test submodule to turn on alternately. Figure 7 , d 2 Indicates the duty cycle of the switch control signal of the test submodule, T 2Represents the period of the switch control signal of the accompanying test submodule, that is, 1 / f, where f is the frequency. When the power switch device connected to the positive pole of the second energy storage module 604 in the accompanying test submodule is turned on, the voltage applied to both ends of the inductor is positive, and the current flowing through the inductor increases; if the processor controls the power switch device connected to the negative pole of the second energy storage module 604 in the accompanying test submodule to be turned on, the voltage applied to both ends of the inductor is negative, and the current flowing through the inductor decreases. Because the inductor current cannot change suddenly, the current direction will not change in a short time, and the current flowing through the inductor fluctuates around the preset reference current. At this time, a continuous and relatively stable DC current can be maintained to charge the test submodule in the positive direction.

[0115] It can be understood that in the above power unit, the specific types of the first power switch device T1 and the second power switch device T2 are not unique, and can be MOS (Metal-Oxide-Semiconductor) tubes or IGBT (Insulated Gate Bipolar Transistor), etc., without specific limitation.

[0116] The above scheme controls the power switch devices of the test submodule to alternately conduct, so that the current flowing through the inductor increases and decreases alternately. Since the inductor current cannot change suddenly, the current direction will not change in a short time, thereby maintaining a continuous and relatively stable DC current to charge the test submodule.

[0117] In some embodiments, the high voltage end of the first power module is connected to the high voltage end of the second power module through an inductor, and the companion test submodule is controlled to charge the sample submodule in reverse mode, including: controlling the companion test submodule to charge the inductor; controlling the sample submodule to enter a charging mode, and controlling the power switching devices of the companion test submodule to be turned on in rotation, so as to charge the sample submodule in reverse mode through the electric energy stored in the inductor and the energy storage module of the companion test submodule.

[0118] Specifically, in order to facilitate understanding of the technical solution of the present embodiment, the following also uses the accompanying test submodule and the sample submodule to set the inductor, and the power module includes a half-bridge power module for explanation. In the solution of the present embodiment, when the voltage difference between the accompanying test submodule and the sample submodule is less than the second preset threshold value, the accompanying test submodule is first controlled to charge the inductor. Specifically, the processor first controls the second power switch device T2 connected to the negative pole of the first energy storage module 602 in the sample submodule to turn on, and at the same time controls the power switch device connected to the positive pole of the second energy storage module 604 in the accompanying test submodule to turn on. At this time, the electric energy of the accompanying test submodule is transmitted to the inductor for charging.

[0119] After that, the processor controls the test submodule to enter the charging mode, and controls the power switch devices of the accompanying test submodule to be turned on in rotation. Specifically, the processor controls the first power switch device T1 of the test submodule to be turned on, and the electric energy input to the test submodule includes the electric energy stored in the inductor and the electric energy stored in the second energy storage module 604, so as to achieve a boosting effect, and realize the reverse mode charging of the accompanying test submodule to the test submodule.

[0120] For details, please refer to Figure 8 , d 1 Represents the duty cycle of the switch control signal of the test submodule, T 1 Represents the period of the switch control signal of the test submodule, d 2 Indicates the duty cycle of the switch control signal of the test submodule, T 2 Represents the period of the switch control signal of the companion test submodule. When the frequency of the switch control signal of the test submodule is set too low, the first power switch device will be turned on for a long time, and accordingly, the time for charging the inductor is short. In the process of the two power switch devices of the companion test submodule being turned on in rotation, the voltages at both ends of the inductor are negative, which will cause the current to continue to decrease for a long time. Therefore, in a more detailed embodiment, it is necessary to set a suitable frequency of the switch control signal to reduce the turn-on time of the first power switch device, so that the current flowing through the inductor fluctuates above and below the preset reference current, so as to achieve continuous and stable reverse mode charging.

[0121] In the above scheme, when the voltage of the companion test submodule is lower than the voltage of the sample submodule, the sample submodule is first controlled to charge the inductor, and then the electric energy of the inductor and the electric energy stored in the energy storage module of the companion test submodule are transmitted to the sample submodule, thereby achieving a voltage boosting effect and maintaining a continuous and relatively stable DC current to charge the sample submodule.

[0122] In some embodiments, controlling the accompanying test submodule to DC charge the sample submodule includes: inputting a switch control signal with any duty cycle and frequency to the sample submodule, and inputting a switch control signal with a fixed frequency to the accompanying test submodule to control the accompanying test submodule to DC charge the sample submodule.

[0123] Specifically, please refer to Fig. 9 In the solution of this embodiment, in the process of testing the test submodule, in order to obtain the charging state parameters of the test submodule under various working conditions, the test accuracy of the test submodule is improved. During the test, the accompanying test submodule and the test submodule are modulated separately. When the test submodule is controlled to start charging, a switch control signal with any duty cycle (d1) and any frequency (f) can be input to the test submodule, and the accompanying test submodule controls the operation of its second power module with a switch control signal of a higher fixed frequency, thereby charging the test submodule.

[0124] It should be noted that the type of switch control signal is not unique. In a more detailed embodiment, the switch control signal includes a PWM (Pulse Width Modulation) signal. The processor is provided with a PWM controller or the processor has a PWM modulation function. In the actual test process, the PWM controller generates a switch control signal of any frequency and any duty cycle according to the test requirements, controls the operation of the first power module of the test submodule, and completes DC charging.

[0125] In more detail, in one embodiment, the frequency and duty cycle of the switch control signal required by the test submodule can be preset. For example, the frequency of the switch control signal is set to 10 Hz (Hertz), 20 Hz... 1000 Hz, then, in the actual test process, the test submodule needs to be controlled to run at a frequency of 10 Hz, 20 Hz... up to 1000 Hz to complete each charging test at the set frequency.

[0126] In the above scheme, the test submodule can perform charging test with a switch control signal of any duty cycle and frequency, thereby completing charging test from 0 to the highest operating frequency and any duty cycle, enriching the test scenarios of the test submodule.

[0127] In some embodiments, the energy storage valve submodule testing method further includes: adjusting the duty cycle of the switch control signal of the accompanying test submodule according to the current sampling value of the first end of the test submodule and the preset reference current.

[0128] For details, please continue to see Fig. 9 In the scheme of this embodiment, the duty cycle of the switch control signal of the accompanying test submodule changes with the change of the load current fed back by the test product submodule. The specific adjustment method is PI (proportional integral) regulation. The processor has a PI regulation function or is provided with a PI regulator. The processor obtains the current value between the first end of the test product submodule and the inductor, that is, the current sampling value (iL). The preset reference current (I_ref) and the current sampling value will produce a difference, and the difference enters the PI regulator for regulation. The PI regulator can make the input value track the reference value, that is, here the PI regulator makes the difference between the preset reference current and the current sampling value as small as possible, that is, the value of the current sampling value always tracks the value of the preset reference current, and a stable DC charging current is achieved. The duty cycle value when the difference between the preset reference current and the current sampling value is very small is obtained through the output of the PI regulator, and it is used as the duty cycle of the switch control signal of the accompanying test submodule, and input into the PWM controller to generate a modulation wave to achieve the control of the accompanying test submodule.

[0129] It should be pointed out that the size of the preset reference current is not unique. According to actual test requirements, the preset reference current can be set to any size, such as 0 to the maximum operating current of the test submodule, so as to achieve full testing of the test submodule from 0 to the maximum operating current.

[0130] In the above scheme, when the companion test submodule charges the submodule by switching on and off the switch control signal of a fixed frequency, the duty cycle of the switch control signal can be adjusted in real time in combination with the actual feedback current sampling value, thereby improving the test reliability of the test submodule.

[0131] In some embodiments, the charging state parameter includes at least one of a current parameter, a voltage parameter, and a temperature parameter.

[0132] Specifically, the current parameter is the current value of the test submodule in the charging operation state; the voltage parameter is the voltage value of the test submodule in the charging operation state; and the temperature parameter is the temperature value of the battery in the energy storage module in the charging operation state of the test submodule.

[0133] In the solution of this embodiment, during the process of the test submodule performing the pair-drag test and charging it by the companion test submodule, at least one of the current parameters, voltage parameters, and temperature parameters can be obtained, so as to analyze the operating status of the test submodule based on one or more of the current parameters, voltage parameters, and temperature parameters, so as to determine whether the test submodule can be put into use in the energy storage system.

[0134] In the above scheme, the charging state parameter includes at least one of the current parameter, the voltage parameter, and the temperature parameter, so that the corresponding test content of the test submodule can be completed according to at least one of the current parameter, the voltage parameter, and the temperature parameter, which can effectively enrich the test content.

[0135] See also Fig.10 , in some embodiments, step 106 includes step 1061.

[0136] Step 1061, determining the voltage stress state and the current stress state of the test submodule during the charging process according to the voltage parameters and the current parameters.

[0137] Specifically, voltage stress is the ratio of voltage in application to component specification value, that is, the ratio of working voltage to rated voltage. Current stress is the ratio of current in application to component specification value, that is, the ratio of working current to rated current. The scheme of this embodiment obtains voltage parameters and current parameters in real time to analyze and obtain the voltage stress state and current stress state of the test submodule, that is, the real-time voltage stress and current stress.

[0138] It should be noted that the specific forms of the voltage stress state and the current stress state are not unique. In one embodiment, the voltage stress state may be a specific voltage stress value of the voltage stress, or an analysis result of whether the voltage stress is normal, etc., without specific limitation. Similarly, the current stress state may be a specific current stress value of the voltage stress, or an analysis result of whether the current stress is normal, etc., without specific limitation.

[0139] In a more detailed embodiment, based on the voltage stress and current stress obtained in real time, it is possible to further analyze whether the voltage parameter or current parameter of the test submodule is abnormal. Specifically, a threshold value can be set for the voltage stress and the current stress respectively. When the voltage stress exceeds the corresponding threshold value, the voltage parameter is confirmed to be abnormal, and when the current stress exceeds the corresponding threshold value, the current parameter is confirmed to be abnormal.

[0140] It is understandable that the threshold value is not unique and is not specifically limited. For example, in a more detailed embodiment, the threshold value corresponding to the voltage stress can be set to 90%, and the threshold value corresponding to the current stress can be set to 80%.

[0141] The above scheme can implement voltage stress testing according to the voltage parameters of the test submodule during the charging process, and implement current stress testing through current parameters, so as to determine the voltage stress state and current stress state of the energy storage valve submodule, and improve the operational reliability of the test submodule when it is put into use.

[0142] See also Fig.10 , in some embodiments, step 106 also includes step 1063.

[0143] Step 1063, determining the current fluctuation state and temperature rise state of the test submodule according to the current parameter and the temperature parameter.

[0144] Specifically, the current fluctuation is the fluctuation of the current value currently obtained relative to the current value obtained last time. The temperature rise is the value of the temperature parameter currently obtained relative to the temperature parameter obtained last time. Similar to the above-mentioned voltage stress state and current stress state, the current fluctuation state can be a specific value of the current fluctuation, or an analysis result of whether the current fluctuation is normal; the temperature rise state can be a specific temperature rise value, or an analysis result of whether the temperature rise is normal, without specific limitation.

[0145] In more detail, in one embodiment, the processor pre-stores a current fluctuation standard threshold and a temperature rise standard threshold. After obtaining the current fluctuation value or the temperature rise value, the processor compares and analyzes with the current fluctuation standard threshold and the temperature rise standard threshold respectively. When the current fluctuation value is less than or equal to the current fluctuation standard threshold, the current fluctuation is considered normal, and when the temperature rise value is less than or equal to the temperature rise standard threshold, the temperature rise is considered normal.

[0146] The above scheme can implement a current fluctuation state test according to the current parameters of the test submodule during the charging process, and implement a temperature rise test through the temperature parameters, thereby determining the current fluctuation state and temperature rise state of the energy storage valve submodule, and improving the operational reliability of the test submodule when it is put into use.

[0147] It should be pointed out that in a more detailed embodiment, after obtaining at least one of the current parameters, voltage parameters, and temperature parameters through the above-mentioned test method, it is also possible to combine one or more of the current parameters, voltage parameters, and temperature parameters to analyze whether the test submodule can be charged normally. The specific analysis method is not unique, and it can be achieved by analyzing the changing state of the voltage parameter, the changing state of the current parameter, or the changing state of the temperature parameter. In other embodiments, it can also be further analyzed according to the voltage stress state, the current stress state, the current fluctuation state, or the temperature rise state, without specific limitation.

[0148] See also Fig.11 In some embodiments, the energy storage valve submodule testing method further includes step 112 , step 114 and step 116 .

[0149] Step 112, controlling the test submodule to discharge the accompanying test submodule;

[0150] Step 114, obtaining the discharge state parameters of the test submodule during the discharge process;

[0151] Step 116, determining the operating state of the test submodule according to the discharge state parameter.

[0152] Specifically, when testing the test submodule, in addition to the charging test in the above embodiment, the test submodule can also be controlled to charge the companion test submodule, obtain the discharge state parameters in this process, and implement the discharge test of the test submodule in combination with the discharge state parameters.

[0153] It can be understood that the discharge state parameters can also include at least one of current parameters, voltage parameters, and temperature parameters. Combined with one or more of the current parameters, voltage parameters, and temperature parameters, one or more of the voltage stress test, current stress test, current fluctuation test, and temperature rise test can be implemented, without specific limitation.

[0154] It should be noted that, in a more detailed embodiment, when the discharge test is performed on the test submodule, the specific operation is similar to the charging operation in the above embodiment, and the test submodule in this embodiment only needs to be regarded as the accompanying test submodule in the above embodiment, and the accompanying test submodule in this embodiment only needs to output the corresponding control signal to control the test submodule to charge the accompanying test submodule, and the specific details will not be repeated.

[0155] The above scheme can also realize the discharge test of the test submodule by controlling the test submodule to charge the companion test submodule, thereby further improving the operational reliability of the test submodule when it is put into use.

[0156] In order to facilitate understanding of the technical solution of the present application, the present application is explained below in conjunction with more detailed embodiments.

[0157] In the solution of this embodiment, both the test submodule and the accompanying test submodule are energy storage valve submodules of half-bridge structure, which are built to form a towing structure. For the specific structure, please refer to Figure 6 In this architecture, the processor first obtains the amount of electricity stored in the energy storage module of the accompanying test submodule, and analyzes whether it can complete the charging test of the preset number of cycles. If not, the accompanying test submodule is charged by an external charging device so that the stored electricity can complete the charging test of several cycles; if it can, the charging test is directly started.

[0158] During the charging test, the processor outputs a switch control signal to the test submodule according to the preset duty cycle and frequency, and controls the on or off of the first power switch device and the second power switch device in the power unit of the first power module of the test submodule. In this process, the current sampling value of the test submodule is obtained in real time, and compared and analyzed with the preset reference current, so that the current sampling value follows the preset reference current, so that the duty cycle required by the accompanying test submodule is obtained through PI adjustment, and a fixed frequency switch control signal is output to the accompanying test submodule to control the on and off of the power switch device in the power unit of the second power module of the accompanying test submodule, thereby realizing the DC charging of the test submodule by the accompanying test submodule.

[0159] During the charging process, the processor can also obtain the voltage values ​​of the test submodule and the accompanying test submodule and analyze them. When the voltage difference between the accompanying test submodule and the test submodule is greater than the first preset threshold, the forward mode charging is turned on. At this time, the processor controls the first power switch device to be turned on and the second power switch device to be turned off through the switch control signal, and maintains continuous and relatively stable DC charging by controlling the two power switch devices of the accompanying test submodule to be turned on in rotation. When the voltage difference between the accompanying test submodule and the test submodule is less than the second preset threshold, the second power switch device of the test submodule is first controlled to be turned on, and the power switch device connected to the positive end of the second energy storage module in the accompanying test submodule is turned on to charge the inductor. After that, the first power switch device of the test submodule is switched on, and the two switch devices of the accompanying test submodule are turned on alternately, and the electric energy stored in the inductor and the electric energy stored in the second energy storage module of the accompanying test submodule are transmitted to the test submodule to achieve a boost effect, that is, to realize reverse mode charging.

[0160] During the process of charging in forward mode or reverse mode, the processor obtains the voltage parameters, current parameters and temperature parameters of the test submodule in real time, and analyzes whether the test submodule can be charged normally according to one or more of the voltage parameters, current parameters and temperature parameters obtained in real time. According to the voltage parameters or current parameters, the voltage stress and current stress are calculated respectively, and then compared and analyzed with the corresponding thresholds to obtain the result of whether the voltage parameters or current parameters are normal during the charging process. And according to the current parameters or temperature parameters, the current fluctuation value or temperature rise value is calculated, and it is compared and analyzed with the current fluctuation standard threshold and the temperature rise standard threshold respectively, so as to determine whether there is charging abnormality in the test submodule. Finally, when all the above tests are normal, it is determined that the test submodule is normal and can be put into use in the energy storage system with high operation reliability.

[0161] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0162] Based on the same inventive concept, the embodiment of the present application also provides an energy storage valve submodule testing device for implementing the energy storage valve submodule testing method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the one or more energy storage valve submodule testing device embodiments provided below can refer to the limitations of the energy storage valve submodule testing method above, and will not be repeated here.

[0163] See also Fig.12 , a storage valve submodule testing device includes: a charging control module 122 and a parameter acquisition module 124.

[0164] The charging control module 122 is used to control the companion submodule to perform DC charging on the sample submodule; the parameter acquisition module 124 is used to acquire the charging state parameters of the sample submodule during the charging process; the charging state parameters are used to determine the operating state of the sample submodule. Specifically, the energy storage valve submodule test device may acquire the charging state parameters and then push them to the user, and the user may determine the operating state of the sample submodule in combination with the charging state parameters; or it may acquire the charging state parameters, further determine the operating state of the sample submodule according to the charging state parameters, and finally push the operating state results, which are not limited here.

[0165] See also Fig.13 In some embodiments, the energy storage valve submodule testing device further includes a power replenishment module 132 .

[0166] The power replenishment module 132 is used to control the accompanying test submodule to replenish power when the accompanying test submodule has a power replenishment demand.

[0167] In some embodiments, the charging control module 122 is also used to control the accompanying test submodule to charge the sample submodule in a forward mode when the voltage difference between the accompanying test submodule and the sample submodule is greater than a first preset threshold value; and to control the accompanying test submodule to charge the sample submodule in a reverse mode when the voltage difference between the accompanying test submodule and the sample submodule is less than a second preset threshold value.

[0168] In some embodiments, the charging control module 122 is further used to control the test submodule to enter the charging mode, and control the power switch devices of the accompanying test submodule to be turned on in rotation, so as to charge the energy storage module of the accompanying test submodule in the forward mode of the test submodule.

[0169] In some embodiments, the charging control module 122 is also used to control the companion test sub-module to charge the inductor; control the test product sub-module to enter the charging mode, and control the power switch device of the companion test sub-module to be turned on in rotation, so as to charge the test product sub-module in reverse mode through the electric energy stored in the inductor and the energy storage module of the companion test sub-module.

[0170] In some embodiments, the charging control module 122 is further used to input a switch control signal with any duty cycle and frequency to the test submodule, and to input a switch control signal with a fixed frequency to the accompanying test submodule, so as to control the accompanying test submodule to provide DC charging to the test submodule.

[0171] In some embodiments, the charging control module 122 is further configured to adjust the duty cycle of the switch control signal of the accompanying test submodule according to the current sampling value of the first end of the test submodule and a preset reference current.

[0172] See also Fig.14 In some embodiments, the energy storage valve submodule test device further includes a discharge test module 142. The discharge test module 142 is used to control the test submodule to discharge the companion test submodule; obtain the discharge state parameters of the test submodule during the discharge process; and determine the operating state of the test submodule according to the discharge state parameters.

[0173] Please refer to Fig.15 In some embodiments, the energy storage valve submodule testing device further includes a state analysis module 152 .

[0174] The state analysis module 152 is used to determine the voltage stress state and the current stress state of the test submodule during the charging process according to the voltage parameters and the current parameters.

[0175] In some embodiments, the state analysis module 152 is further used to determine the current fluctuation state and the temperature rise state of the test submodule according to the current parameters and the temperature parameters.

[0176] The above scheme uses a test submodule and a test product submodule to build a towing architecture, uses the test submodule to charge the test product submodule, obtains the charging state parameters of the test product submodule during the charging process, and thus analyzes the operating state of the test product submodule. Through this scheme, the actual operating conditions of the energy storage valve submodule can be simulated, and the energy storage valve submodule can be tested for operation before it is put into use, thereby reducing the probability of a faulty energy storage valve submodule being put into the energy storage system and improving the operating reliability of the energy storage valve submodule.

[0177] Each module in the energy storage valve submodule test device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0178] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Fig.16As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for testing a submodule of an energy storage valve is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, a trackball or a touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0179] Those skilled in the art will understand that Fig.16 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0180] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0181] The accompanying test submodule is controlled to perform direct current charging on the test submodule; the charging state parameters of the test submodule during the charging process are obtained; and the operating state of the test submodule is determined according to the charging state parameters.

[0182] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0183] The accompanying test submodule is controlled to perform direct current charging on the test submodule; the charging state parameters of the test submodule during the charging process are obtained; and the operating state of the test submodule is determined according to the charging state parameters.

[0184] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0185] The accompanying test submodule is controlled to perform direct current charging on the test submodule; the charging state parameters of the test submodule during the charging process are obtained; and the operating state of the test submodule is determined according to the charging state parameters.

[0186] The above-mentioned computer equipment, storage medium and computer program product use the accompanying test submodule and the test product submodule to build a towing architecture, use the accompanying test submodule to charge the test product submodule, obtain the charging state parameters of the test product submodule during the charging process, and thus analyze and obtain the operating state of the test product submodule. Through this solution, the actual operating conditions of the energy storage valve submodule can be simulated, and the energy storage valve submodule can be tested for operation before it is put into use, thereby reducing the probability of a faulty energy storage valve submodule being put into the energy storage system and improving the operating reliability of the energy storage valve submodule.

[0187] Please refer to Fig.17 The present application also provides a storage valve submodule testing system, including a test submodule 202, a companion test submodule 204 and a processor (not shown in the figure), the test submodule 202 includes a first power module 601 and a first energy storage module 602 connected to each other, the companion test submodule 204 includes a second power module 603 and a second energy storage module 604 connected to each other, the high voltage end of the first power module 601 is connected to the high voltage end of the second power module 603, the low voltage end of the first power module 601 is connected to the low voltage end of the second power module 603, the control end of the first power module 601 and the control end of the second power module 601 are respectively connected to the processor (not shown in the figure), and the processor is used to test the test submodule according to the above-mentioned energy storage valve submodule testing method.

[0188] Specifically, the specific test method implemented by the energy storage valve submodule test system is as shown in the above-mentioned embodiments, which will not be repeated here. This solution uses the accompanying test submodule 204 and the test product submodule 202 to build a towing architecture, uses the accompanying test submodule 204 to charge the test product submodule 202, obtains the charging state parameters of the test product submodule 202 during the charging process, and thus analyzes and obtains the operating state of the test product submodule 202. Through this solution, the actual operating conditions of the energy storage valve submodule can be simulated, and the energy storage valve submodule can be tested for operation before the energy storage valve submodule is put into use, thereby reducing the probability of a faulty energy storage valve submodule being put into the energy storage system and improving the operating reliability of the energy storage valve submodule.

[0189] In one embodiment, please refer to Fig.18 The energy storage valve submodule testing system also includes an inductor L, and the high voltage end of the first power module 601 is connected to the high voltage end of the second power module 603 through the inductor L.

[0190] Specifically, the companion test submodule 204 and the sample submodule 202 both include a power module part and an energy storage module part, and the charge and discharge control of the energy storage module is realized through the power conversion of the power module part. The first end of the first power module 601 and the first end of the second power module 603 are connected through an inductor L, and the second end of the first power module 601 is connected to the second end of the second power module 603, thereby building a pair-pull architecture.

[0191] In one embodiment, the processor has a current sampling function, so the high-voltage end of the first power module 601 can be connected to the processor and the inductor L, and the load current of the test submodule 202 during the charging process is collected by the processor, that is, the current sampling value is obtained, and then the duty cycle of the switch control signal of the accompanying test submodule 204 is adjusted according to the current sampling value.

[0192] It is understandable that in other embodiments, the current sampling value can also be achieved through an additional current collector. In this case, the high-voltage end of the first power module 601 only needs to be connected to the inductor L, and the current sampling value is obtained by wired or wireless communication between the processor and the current collector.

[0193] In the above scheme, an inductor is arranged between the high-voltage end of the first power module and the second power module. The test method under this structure can refer to the description of the energy storage valve submodule test method, which will not be repeated here. Through this scheme, when the voltage of the accompanying test submodule is low, the inductor energy storage can still be used to charge the test submodule, thereby improving the charging reliability of the accompanying test submodule charging the test submodule.

[0194] See also Fig.19 In some embodiments, the energy storage valve submodule testing system further includes an energy replenishment circuit 162 , and the energy replenishment circuit 162 is connected to the second energy storage module 602 (not shown).

[0195] Specifically, in order to simulate various working conditions of the test submodule 202 as much as possible, the accompanying test submodule 204 is required to charge the test submodule 202 for a long time. However, the electric energy stored in the energy storage module of the accompanying test submodule 204 may be too low and cannot meet the long-term charging demand. Therefore, the scheme of this embodiment needs to control the accompanying test submodule 204 to replenish power when the accompanying test submodule 204 has a need for replenishing power, so as to realize a long-term operation test. This scheme, by setting an energy replenishment circuit 162 at the accompanying test submodule 204, can start or end the charging of the accompanying test submodule 204 in real time according to actual needs during the test process, thereby increasing the charging operation time of the accompanying test submodule 204.

[0196] In the above scheme, an energy replenishment circuit 162 is also provided in the energy storage valve submodule test system. The energy replenishment circuit 162 replenishes power for the accompanying test submodule 204, which can effectively increase the endurance time of the accompanying test submodule 204, so that the energy storage valve submodule can perform long-term operation tests.

[0197] Please continue reading Fig.19 In some embodiments, the energy compensation circuit 162 includes a switch device D1 and a current source LS. The current source LS is connected to the second energy storage module 602 (not shown) of the companion test submodule 204 through the switch device D1.

[0198] Specifically, the current source LS is a power supply device that can provide a constant current to supplement the power of the accompanying test submodule 204. Specifically, the current source LS provided in the embodiment of the present application is a DC current source. At the same time, a switch device D1 is also provided in the energy supplement circuit 162, which can prevent the current of the accompanying test submodule 204 from backflowing into the current source LS, thereby improving the operating safety of the current source LS.

[0199] It should be noted that the specific type of the switching device D1 is not unique, and any device that can prevent the current of the companion test sub-module 204 from backflowing into the current source LS can be used. For example, in a more detailed embodiment, the switching device D1 includes a diode, and the anode of the diode is connected to the current source LS, and the cathode of the diode is connected to the second energy storage module 602.

[0200] In the above solution, the energy compensation circuit 162 specifically includes a switch device D1 and a current source LS connected in series, which has a simple structure and can effectively save the volume and circuit cost of the energy storage valve submodule test system.

[0201] In some embodiments, the first power module 601 includes a first power unit and a first capacitor connected in parallel, the high voltage end of the first power unit is connected to the high voltage end of the second power module 603 , and the low voltage end of the first power unit is connected to the low voltage end of the second power module 603 .

[0202] And / or, in some embodiments, the second power module 603 includes a second power unit and a second capacitor in parallel, the high voltage end of the second power unit is connected to the high voltage end of the first power module 601, and the low voltage end of the second power unit is connected to the low voltage end of the first power module 601.

[0203] In the above scheme, the first power module 601 and the second power module 603 both include power units and capacitors. By building this test architecture, it is possible to test an energy storage valve submodule of the type in which the power module includes a power unit and a capacitor, thereby improving the operating reliability of this type of energy storage valve submodule.

[0204] Further, in some embodiments, the first power module 601 includes a full-bridge power module or a half-bridge power module, and the second power module 603 includes a full-bridge power module or a half-bridge power module.

[0205] Please refer to Figure 6 , taking the first power module 601 and the second power module 603 having the same structure and including a half-bridge structure as an example, the first power module 601 includes a first power switch device T1, a second power switch device T2 and a first capacitor C1, and the common end of the first power switch device T1 and the second power switch device T2 serves as a high-voltage end. Correspondingly, the input end of the first power switch device T1 is connected to the input end of the second power switch device T2, a processor (not shown) and a first end of the inductor L, the output end of the first power switch device T1 is connected to the first end of the first capacitor C1 and the first end of the first energy storage module 602, the output end of the second power switch device T2 serves as a low-voltage end and is connected to the second power module 603, the output end of the second power switch device T2 is also connected to the second end of the first capacitor C1 and the second end of the first energy storage module 602, and the control end of the first power switch device T1 and the control end of the second power switch device T2 are respectively connected to the processor (not shown).

[0206] Specifically, in the solution of this embodiment, the common connection end of the first power switch device T1 and the second power switch device T2 is used as the high-voltage end of the first power module 601, and the output end of the second power switch device T2 is used as the low-voltage end of the first power module 601, so as to connect the first energy storage module 602, the inductor L and the accompanying test sub-module 204. The structure of the accompanying test sub-module 204 is consistent with the structure of the test product sub-module 202, and is mirror-symmetrical to form a pair-drag architecture.

[0207] In the above scheme, both the test submodule 202 and the accompanying test submodule 204 are half-bridge structures, which can realize the drag test of the energy storage valve submodule under the half-bridge structure and improve the operating reliability of the energy storage valve submodule under the half-bridge structure.

[0208] Please refer to Fig. 20In some embodiments, taking the first power module 601 and the second power module 603 having the same structure and including a full-bridge structure as an example, the first power module 601 includes a third power switch device T3, a fourth power switch device T4, a fifth power switch device T5, a sixth power switch device T6 and a second capacitor C2, the input end of the third power switch device T3 is connected to the input end of the fourth power switch device T4, a processor (not shown) and a first end of the inductor L, the output end of the third power switch device T3 is connected to the first end of the second capacitor C2 and the first end of the first energy storage module 602, and the first energy storage module 602 The first end of is also connected to the input end of the fifth power switch device T5, the output end of the fifth power switch device T5 is connected to the input end of the sixth power switch device T6 and the second power module 603, the output end of the sixth power switch device T6 is connected to the second end of the first energy storage module 602, the output end of the fourth power switch device T4 is connected to the second end of the second capacitor C2 and the second end of the first energy storage module 602, and the control end of the third power switch device T3, the control end of the fourth power switch device T4, the control end of the fifth power switch device T5 and the control end of the sixth power switch device T6 are respectively connected to the processor (not shown).

[0209] Specifically, in the solution of this embodiment, the common connection end of the third power switch device T3 and the fourth power switch device T4 is used as the high voltage end of the first power module 601, the common connection end of the fifth power switch device T5 and the sixth power switch device T6 is used as the low voltage end of the first power module 601, and the control end of each power switch device is used as the control end of the first power module 601. In this way, the first energy storage module 602, the inductor L and the accompanying test submodule 204 are connected, and the structure of the accompanying test submodule 204 is consistent with the structure of the test product submodule 202, and is mirror-symmetrical to form a pair-pull architecture.

[0210] In the above scheme, both the test submodule 202 and the accompanying test submodule 204 are full-bridge structures, which can realize the towing test of the energy storage valve submodule under the full-bridge structure and improve the operation reliability of the energy storage valve submodule of the full-bridge structure.

[0211] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A method for testing an energy storage valve submodule, characterized in that: include: Control the test companion submodule to perform DC charging on the sample submodule, wherein the sample submodule includes a first power module and a first energy storage module connected to each other, the test companion submodule includes a second power module and a second energy storage module connected to each other, the high voltage end of the first power module is connected to the high voltage end of the second power module, and the low voltage end of the first power module is connected to the low voltage end of the second power module; Obtaining charging state parameters of the test submodule during the charging process; The operating state of the test submodule is determined according to the charging state parameter.

2. The energy storage valve submodule testing method according to claim 1, characterized in that: The control test companion submodule is to DC charge the test sample submodule, including: When the voltage difference between the accompanying test submodule and the sample submodule is greater than a first preset threshold, controlling the accompanying test submodule to charge the sample submodule in a forward mode; When the voltage difference between the accompanying test submodule and the sample submodule is less than a second preset threshold, the accompanying test submodule is controlled to charge the sample submodule in reverse mode; wherein the first preset threshold is greater than or equal to the second preset threshold.

3. The energy storage valve submodule testing method according to claim 2, characterized in that: The control test companion submodule charges the test product submodule in a forward mode, including: The test submodule is controlled to enter a charging mode, and the power switch device of the companion test submodule is controlled to be turned on in rotation, so as to charge the test submodule in a forward mode through the second energy storage module.

4. The energy storage valve submodule testing method according to claim 2, characterized in that: The high voltage end of the first power module is connected to the high voltage end of the second power module through an inductor, and the control test submodule charges the test submodule in reverse mode, including: Controlling the accompanying test submodule to charge the inductor; The test submodule is controlled to enter a charging mode, and the power switch device of the companion test submodule is controlled to be turned on in rotation, so as to charge the test submodule in a reverse mode through the electric energy stored in the inductor and the second energy storage module.

5. The energy storage valve submodule testing method according to claim 1, characterized in that: The control test companion submodule is to DC charge the test sample submodule, including: A switch control signal with any duty cycle and frequency is input to the test submodule, and a switch control signal with a fixed frequency is input to the accompanying test submodule, so as to control the accompanying test submodule to perform direct current charging on the test submodule.

6. The energy storage valve submodule testing method according to claim 5, characterized in that: Also includes: The duty cycle of the switch control signal of the accompanying test submodule is adjusted according to the current sampling value of the first end of the test submodule and the preset reference current.

7. The energy storage valve submodule testing method according to any one of claims 1 to 6, characterized in that: The charging state parameter includes at least one of a current parameter, a voltage parameter, and a temperature parameter.

8. The energy storage valve submodule testing method according to claim 7, characterized in that: Determining the operating state of the test submodule according to the charging state parameter includes: Determining a voltage stress state and a current stress state of the test submodule during charging according to the voltage parameter and the current parameter; And / or, determining the current fluctuation state and the temperature rise state of the test submodule according to the current parameter and the temperature parameter.

9. The energy storage valve submodule testing method according to any one of claims 1 to 6, characterized in that: Also includes: When the accompanying test submodule has a need for power supplement, the accompanying test submodule is controlled to perform power supplement.

10. The energy storage valve submodule testing method according to any one of claims 1 to 6, characterized in that: Also includes: Controlling the test product submodule to discharge the accompanying test submodule; Obtaining discharge state parameters of the test submodule during the discharge process; The operating state of the test submodule is determined according to the discharge state parameter.

11. A storage valve submodule testing device, characterized in that: include: A charging control module, used to control the accompanying test submodule to perform DC charging on the sample submodule, wherein the sample submodule includes a first power module and a first energy storage module connected to each other, the accompanying test submodule includes a second power module and a second energy storage module connected to each other, the high voltage end of the first power module is connected to the high voltage end of the second power module, and the low voltage end of the first power module is connected to the low voltage end of the second power module; The parameter acquisition module is used to acquire the charging state parameters of the sample submodule during the charging process; the charging state parameters are used to determine the operating state of the sample submodule.

12. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the energy storage valve submodule testing method according to any one of claims 1 to 10 are implemented.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the energy storage valve submodule testing method according to any one of claims 1 to 10 are implemented.

14. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the energy storage valve submodule testing method described in any one of claims 1 to 10 are implemented.

15. A storage valve submodule testing system, characterized in that: It includes a test submodule, a companion test submodule and a processor, the test submodule includes a first power module and a first energy storage module connected to each other, the companion test submodule includes a second power module and a second energy storage module connected to each other, the high voltage end of the first power module is connected to the high voltage end of the second power module, the low voltage end of the first power module is connected to the low voltage end of the second power module, the control end of the first power module and the control end of the second power module are respectively connected to the processor, and the processor is used to test the test submodule according to the energy storage valve submodule testing method according to any one of claims 1-10.

16. The energy storage valve submodule testing system according to claim 15, characterized in that: An inductor is also included, and the high-voltage end of the first power module is connected to the high-voltage end of the second power module through the inductor.

17. The energy storage valve submodule testing system according to claim 15, characterized in that: It also includes an energy replenishment circuit, which is connected to the second energy storage module.

18. The energy storage valve submodule testing system according to claim 16, characterized in that: The energy compensation circuit includes a switch device and a current source, and the current source is connected to the second energy storage module through the switch device.

19. The energy storage valve submodule testing system according to claim 15, characterized in that: The first power module includes a first power unit and a first capacitor connected in parallel, a high voltage end of the first power unit is connected to a high voltage end of the second power module, and a low voltage end of the first power unit is connected to a low voltage end of the second power module; And / or, the second power module includes a second power unit and a second capacitor connected in parallel, the high voltage end of the second power unit is connected to the high voltage end of the first power module, and the low voltage end of the second power unit is connected to the low voltage end of the first power module.

20. The energy storage valve submodule testing system according to claim 19, characterized in that: The first power module includes a full-bridge power module or a half-bridge power module, and the second power module includes a full-bridge power module or a half-bridge power module.

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