Aging circuit and electronic equipment

Abstract

The utility model provides an aging circuit and electronic equipment. The aging circuit comprises a direct current power supply, a first energy storage inverter, a second energy storage inverter, a transformer and a control module. And the first energy storage inverter and the second energy storage inverter are connected with a direct-current power supply at the same time. The primary side of the transformer is connected with the first energy storage inverter and the second energy storage inverter, and the secondary side of the transformer is connected with a power grid. The control module is connected with the direct-current power supply, the first energy storage inverter and the second energy storage inverter. The control module is used for collecting operation data of the DC power supply, the first energy storage inverter and the second energy storage inverter, and controlling the first energy storage inverter and the second energy storage inverter to age based on the operation data. According to the embodiment of the invention, the aging test can be carried out on the two energy storage inverters at the same time, the unified direct-current power supply is adopted, centralized management and operation are facilitated, the aging test process is simplified, and the test efficiency is improved.

Description

Aging circuits and electronic devices Technical Field

[0001] This application relates to the field of electronic circuit technology, and in particular to an aging circuit and electronic device. Background Technology

[0002] With the rapid development of photovoltaic energy storage systems, energy storage inverters, as core components, require aging tests as a crucial step to ensure their quality.

[0003] Currently, common energy storage inverters consist of MPPT (Maximum Power Point Tracking) units, bidirectional DC (Direct Current) units, and inverter units. These units contain numerous switching transistors, inductors, capacitors, and other components. To ensure product quality, thorough aging of the relevant circuits is necessary. The current aging process involves using a battery or bidirectional DC power supply at the input of the bidirectional DC unit, while using a unidirectional DC power supply at the PV (Photovoltaic) terminal of the MPPT unit. However, bidirectional DC power supplies require specialized equipment and are expensive. Furthermore, in existing aging tests, if multiple energy storage inverters are involved, each is tested individually, incurring significant time costs. When production demand surges, manufacturers must invest heavily in aging tests, severely compressing profit margins, necessitating the search for new cost-reduction and efficiency-enhancing solutions. Summary of the Invention

[0004] This application provides an aging circuit and electronic device that can simultaneously age two energy storage inverters, improving the efficiency of aging tests.

[0005] In a first aspect, embodiments of this application provide an aging circuit, the aging circuit comprising: a DC power supply; a first energy storage inverter and a second energy storage inverter, the first energy storage inverter and the second energy storage inverter being simultaneously connected to the DC power supply; a transformer, the primary side of the transformer being connected to the first energy storage inverter and the second energy storage inverter, the secondary side of the transformer being connected to the power grid; and a control module connected to the DC power supply, the first energy storage inverter and the second energy storage inverter, the control module being used to collect operating data of the DC power supply, the first energy storage inverter and the second energy storage inverter, and to control the first energy storage inverter and the second energy storage inverter to perform aging based on the operating data.

[0006] In some embodiments, the first energy storage inverter includes: a first MPPT unit and a second MPPT unit, wherein the positive terminals of the first MPPT unit and the second MPPT unit are both connected to the positive terminal of the DC power supply, and the negative terminals of the first MPPT unit and the second MPPT unit are both connected to the negative terminal of the DC power supply; a first bidirectional DC unit, wherein the positive terminal of the first bidirectional DC unit is connected to the positive terminal of the DC power supply, and the negative terminal of the first bidirectional DC unit is connected to the negative terminal of the DC power supply; and a first inverter unit, wherein the DC terminal of the first inverter unit is simultaneously connected to the output terminal of the first bidirectional DC unit, the output terminal of the first MPPT unit, and the output terminal of the second MPPT unit, and the AC terminal of the first inverter unit is connected to the primary side of the transformer; wherein the control module is communicatively connected to the first MPPT unit, the second MPPT unit, the first bidirectional DC unit, and the first inverter unit.

[0007] In some embodiments, the second energy storage inverter includes: a third MPPT unit and a fourth MPPT unit, wherein the positive terminals of the third MPPT unit and the fourth MPPT unit are both connected to the positive terminal of the DC power supply, and the negative terminals of the third MPPT unit and the fourth MPPT unit are both connected to the negative terminal of the DC power supply; a second bidirectional DC unit, wherein the positive terminal of the second bidirectional DC unit is connected to the positive terminal of the DC power supply, and the negative terminal of the second bidirectional DC unit is connected to the negative terminal of the DC power supply; and a second inverter unit, wherein the DC terminal of the second inverter unit is simultaneously connected to the output terminal of the second bidirectional DC unit, the output terminal of the third MPPT unit, and the output terminal of the fourth MPPT unit, and the AC terminal of the second inverter unit is connected to the primary side of the transformer; wherein the control module is communicatively connected to the third MPPT unit, the fourth MPPT unit, the second bidirectional DC unit, and the second inverter unit.

[0008] In some embodiments, the aging circuit further includes: a first switching module connected in series between the first energy storage inverter and the transformer; and a second switching module connected in series between the second energy storage inverter and the transformer.

[0009] In some embodiments, the aging circuit further includes a pre-charge module, the first end of which is connected to the secondary side of the transformer, and the second end of which is connected to the power grid.

[0010] In some embodiments, the aging circuit further includes a contact module, wherein a first end of the contact module is connected to the secondary side of the transformer, and a second end of the contact module is connected to the power grid.

[0011] In some embodiments, the aging circuit further includes a third switch module connected in series between the contact module and the power grid.

[0012] In some embodiments, the control module is communicatively connected to the first energy storage inverter and the second energy storage inverter via a first communication method.

[0013] In some embodiments, the control module is communicatively connected to the DC power supply via a second communication method.

[0014] Secondly, embodiments of this application also provide an electronic device, which includes the aging circuit described above.

[0015] Unlike existing technologies, this application provides an aging circuit and electronic device. The aging circuit includes a DC power supply, a first energy storage inverter, a second energy storage inverter, a transformer, and a control module. The first and second energy storage inverters are simultaneously connected to the DC power supply; the primary side of the transformer is connected to both the first and second energy storage inverters, and the secondary side is connected to the power grid; the control module is connected to the DC power supply, the first energy storage inverter, and the second energy storage inverter. Specifically, the control module collects operating data from the DC power supply, the first energy storage inverter, and the second energy storage inverter, and controls the first and second energy storage inverters to undergo aging based on this operating data. This application allows for simultaneous aging tests on two energy storage inverters, and the use of a unified DC power supply facilitates centralized management and operation, simplifies the aging test process, improves testing efficiency, reduces labor and time costs, and is beneficial for large-scale product production and quality control. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 is a structural block diagram of an aging circuit provided in an embodiment of this application;

[0018] Figure 2 is a schematic diagram of the circuit structure of an aging circuit provided in an embodiment of this application;

[0019] Figure 3 is a schematic diagram of the power flow when the aging circuit 100 provided in the embodiment of this application is in the first stage of aging;

[0020] Figure 4 is a schematic diagram of the power flow when the aging circuit 100 provided in the embodiment of this application is in the second stage of aging;

[0021] Figure 5 is a schematic diagram of the power flow when the aging circuit 100 provided in the embodiment of this application is in the third stage of aging;

[0022] Figure 6 is a schematic diagram of the power flow when the aging circuit 100 provided in the embodiment of this application is in the fourth stage of aging. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0024] The technical features involved in the various embodiments of this application described below do not conflict with each other and can be combined with each other.

[0025] When an element is described as "connected" to another element, it can be directly connected to the other element, or there may be one or more intervening elements between them.

[0026] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0027] Please refer to Figure 1, which is a structural block diagram of an aging circuit 100 provided in an embodiment of this application.

[0028] This application provides an aging circuit 100, which includes a first energy storage inverter 10, a second energy storage inverter 20, a DC power supply 30, a control module 40, and a transformer 50.

[0029] Specifically, the first energy storage inverter 10 and the second energy storage inverter 20 are simultaneously connected to the DC power supply 30. The primary side of the transformer 50 is connected to the first energy storage inverter 10 and the second energy storage inverter 20, and the secondary side of the transformer 50 is connected to the power grid 200. The control module 40 is connected to the DC power supply 30, the first energy storage inverter 10, and the second energy storage inverter 20. The control module 40 is used to collect the operating data of the DC power supply 30, the first energy storage inverter 10, and the second energy storage inverter 20, and to control the first energy storage inverter 10 and the second energy storage inverter 20 to undergo aging based on the operating data.

[0030] Among them, the first energy storage inverter 10 and the second energy storage inverter 20 are both energy storage inverters, which are electronic devices that convert direct current (DC) to alternating current (AC). For the energy storage inverter, on the one hand, it realizes the conversion of DC to AC power; on the other hand, it can adjust the parameters of the output AC power, such as voltage, frequency, and phase, according to the instructions of the control module 40, to meet different application requirements, and withstand the test of different operating conditions during the aging process.

[0031] A DC power supply 30 is a device capable of providing direct current (DC) power. It can be a battery pack, solar panel, DC generator, etc. In some embodiments, the DC power supply 30 is a unidirectional DC charging station. A unidirectional DC charging station converts alternating current (AC) from the power grid into direct current (DC) for power supply.

[0032] The control module 40 typically consists of a microprocessor, sensors, and control circuits. The control module 40 collects operating data from the DC power supply 30, the first energy storage inverter 10, and the second energy storage inverter 20, such as voltage, current, power, and temperature. It analyzes and processes this data, and then, according to a preset aging strategy, controls the operating states of the first energy storage inverter 10 and the second energy storage inverter 20, such as output power and operating mode, thereby controlling the aging process of the first energy storage inverter 10 and the second energy storage inverter 20. The preset aging strategy includes aging the first energy storage inverter 10 and the second energy storage inverter 20 in four stages.

[0033] Transformer 50 is a device that uses the principle of electromagnetic induction to change AC voltage. It mainly consists of an iron core and two or more windings wound around the iron core. In the aging circuit 100, transformer 50 is used to transform the AC power output from the first energy storage inverter 10 and the second energy storage inverter 20, raising or lowering the voltage of the AC power output from the inverters to a voltage level that matches the grid 200, thereby achieving efficient power transmission and grid connection. Simultaneously, transformer 50 also provides electrical isolation, improving circuit safety.

[0034] The power grid 200 is a power system composed of power generation, transmission, transformation, distribution and consumption.

[0035] In practical applications, the control module 40 first starts working, collecting operating data from the DC power supply 30, the first energy storage inverter 10, and the second energy storage inverter 20. This operating data includes, but is not limited to, parameters such as voltage, current, power, and temperature. For example, the output voltage and current of the DC power supply 30 reflect its power supply capacity; the power and temperature data of the energy storage inverters (first energy storage inverter 10 and second energy storage inverter 20) reflect their operating status and load conditions.

[0036] Next, the control module 40 analyzes the collected operating data. It compares this data with pre-set aging standards and parameters to determine whether the operating state of the energy storage inverter meets the aging requirements (e.g., whether the inverter temperature is too high, or whether the power output is abnormal). If the aging requirements are met, aging can begin; if not, the control module 40 generates corresponding control commands to prevent aging. Then, if the aging requirements are met, the control module 40 sends control commands to the first energy storage inverter 10 and the second energy storage inverter 20 to adjust their operating states, thereby controlling the aging process.

[0037] Control methods may include adjusting output power, changing operating modes, and temperature control. For example, adjusting output power means the control module 40 can regulate the inverter's output power, allowing it to operate under different load conditions to simulate various real-world operating conditions and accelerate the aging process. Changing operating modes involves controlling the energy storage inverter to switch between different operating modes, such as constant power mode, constant voltage mode, standby mode, full power mode, and passive execution mode, allowing the inverter to experience diverse operating states for comprehensive aging. Temperature control means that if the inverter temperature is too high, the control module 40 can adjust the inverter's operating parameters or activate cooling equipment to ensure the inverter ages within a suitable temperature range and avoids damage caused by overheating.

[0038] In summary, the aging circuit 100 can simultaneously age the first energy storage inverter 10 and the second energy storage inverter 20, thus improving the efficiency of the aging test.

[0039] Please refer to Figure 2, which is a schematic diagram of the circuit structure of an aging circuit 100 provided in an embodiment of this application.

[0040] In some embodiments, the first energy storage inverter 10 includes a first MPPT unit 11, a second MPPT unit 12, a first bidirectional DC unit 13, and a first inverter unit 14.

[0041] In this configuration, the positive terminals of the first MPPT unit 11 and the second MPPT unit 12 are both connected to the positive terminal of the DC power supply 30, and the negative terminals of both are connected to the negative terminal of the DC power supply 30. The positive terminal of the first bidirectional DC unit 13 is connected to the positive terminal of the DC power supply 30, and the negative terminal of the first bidirectional DC unit 13 is connected to the negative terminal of the DC power supply 30. The DC terminal of the first inverter unit 14 is simultaneously connected to the output terminals of the first bidirectional DC unit 13, the first MPPT unit 11, and the second MPPT unit 12, while the AC terminal of the first inverter unit 14 is connected to the primary side of the transformer 50. The control module 40 is communicatively connected to the first MPPT unit 11, the second MPPT unit 12, the first bidirectional DC unit 13, and the first inverter unit 14.

[0042] The first bidirectional DC unit 13 is a bidirectional DC circuit. Specifically, it can be a bidirectional Buck-Boost circuit. When operating in Buck mode, it converts a higher input voltage to a lower output voltage; when operating in Boost mode, it converts a lower input voltage to a higher output voltage. The first bidirectional DC unit 13 enables bidirectional energy flow, meaning it can boost or buck the voltage at its first terminal and output it to the second terminal, and vice versa. In other embodiments, the first bidirectional DC unit 13 can be any other device capable of performing the same function.

[0043] The first inverter unit 14 is an inverter circuit that converts direct current (DC) to alternating current (AC). The inverter circuit is typically composed of switching devices (such as IGBTs, MOSFETs, etc.). By controlling the turn-on and turn-off sequence and time of the switching devices, the DC current is chopped into a series of pulse signals. Then, after filtering and other processing, these pulse signals are converted into approximately sinusoidal alternating current.

[0044] In some embodiments, the second energy storage inverter 20 includes a third MPPT unit 21, a fourth MPPT unit 22, a second bidirectional DC unit 23, and a second inverter unit 24.

[0045] In this configuration, the positive terminals of the third MPPT unit 21 and the fourth MPPT unit 22 are both connected to the positive terminal of the DC power supply 30, and the negative terminals of both are connected to the negative terminal of the DC power supply 30. The positive terminal of the second bidirectional DC unit 23 is connected to the positive terminal of the DC power supply 30, and the negative terminal of the second bidirectional DC unit 23 is connected to the negative terminal of the DC power supply 30. The DC terminal of the second inverter unit 24 is simultaneously connected to the output terminals of the second bidirectional DC unit 23, the third MPPT unit 21, and the fourth MPPT unit 22, while the AC terminal of the second inverter unit 24 is connected to the primary side of the transformer 50. The control module 40 is communicatively connected to the third MPPT unit 21, the fourth MPPT unit 22, the second bidirectional DC unit 23, and the second inverter unit 24.

[0046] The second bidirectional DC unit 23 is a bidirectional DC circuit. Specifically, it can be a bidirectional Buck-Boost circuit. When operating in Buck mode, it converts a higher input voltage to a lower output voltage; when operating in Boost mode, it converts a lower input voltage to a higher output voltage. The second bidirectional DC unit 23 enables bidirectional energy flow, meaning it can boost or buck the voltage at its first terminal and output it to the second terminal, and vice versa. In other embodiments, the second bidirectional DC unit 23 can be any other device capable of performing the same function.

[0047] The second inverter unit 24 is an inverter circuit that converts direct current (DC) to alternating current (AC). The inverter circuit is typically composed of switching devices (such as IGBTs, MOSFETs, etc.). By controlling the turn-on and turn-off sequence and time of the switching devices, the DC current is chopped into a series of pulse signals. Then, after filtering and other processing, these pulse signals are converted into approximately sinusoidal alternating current.

[0048] In some embodiments, as shown in FIG2, the transformer 50 includes a first primary winding P, a second primary winding S, and a secondary winding T. The first primary winding P and the second primary winding S are the primary windings of the transformer 50, and the secondary winding T is the secondary winding of the transformer 50.

[0049] In this design, both the first primary winding P and the second primary winding S are three-phase four-wire windings with an N-line, while the secondary winding T is a three-phase three-wire winding. Specifically, transformer 50 serves as a safety feature for electrical isolation.

[0050] In some embodiments, the aging circuit 100 further includes a first switching module 60 and a second switching module 70.

[0051] The first switch module 60 is connected in series between the first energy storage inverter 10 and the transformer 50. Specifically, as shown in Figure 2, the first switch module 60 includes four air switches, which are connected in series between the first inverter unit 14 and the first primary winding P of the transformer 50. The first switch module 60 serves a safety protection function.

[0052] The second switch module 70 is connected in series between the second energy storage inverter 20 and the transformer 50. Specifically, as shown in Figure 2, the second switch module 70 includes four air switches, which are connected in series between the second inverter unit 24 and the second primary winding S of the transformer 50. The second switch module 70 serves a safety protection function.

[0053] In some embodiments, the aging circuit 100 further includes a pre-charge module 80.

[0054] The pre-charge module 80 has its first end connected to the secondary side of the transformer 50, and its second end connected to the power grid 200. Specifically, as shown in Figure 2, the pre-charge module 80 includes three pre-charge resistors, which are connected in series between the secondary winding T and the power grid 20. The pre-charge resistors serve to pre-charge the transformer when the power grid supplies power.

[0055] In some embodiments, the aging circuit 100 further includes a contact module 90.

[0056] The first end of the contact module 90 is connected to the secondary side of the transformer 50, and the second end of the contact module 90 is connected to the power grid 200. As shown in Figure 2, specifically, the contact module 90 includes three AC contactors, which are connected in parallel with the three pre-charging circuits in the pre-charging module 80. These AC contactors serve a safety protection function.

[0057] In some embodiments, the aging circuit 100 further includes a third switch module 110. The third switch module 110 is connected in series between the contact module 90 and the power grid 200. As shown in FIG2, specifically, the third switch module 110 includes three air switches, which are connected in series between the contact module 90 and the power grid 200. The third switch module 110 serves a safety protection function.

[0058] The first switch module 60, the second switch module 70, the contact module 90, and the third switch module 110 can all be connected to the control module 40. The control module 40 controls their on / off states based on a preset aging strategy. The preset aging strategy includes aging the first energy storage inverter 10 and the second energy storage inverter 20 in four stages.

[0059] In some embodiments, the control module 40 is communicatively connected to the first energy storage inverter 10 and the second energy storage inverter 20 via a first communication method. The first communication method may be RS485 communication.

[0060] In some embodiments, the control module 40 is connected to the DC power supply 30 via a second communication method. This second communication method may be CAN communication.

[0061] The working principle of the aging circuit 100 is briefly described below.

[0062] As shown in Figure 2, when an aging test is required, the control module 40 can control the third switch module 110 to engage, then control the contact module 90 to engage, then control the first switch module 60 to engage, and then control the second switch module 70 to engage.

[0063] First, the control module 40 collects operating data from the DC power supply 30, the first energy storage inverter 10, and the second energy storage inverter 20. This operating data includes, but is not limited to, parameters such as voltage, current, power, and temperature. For example, the output voltage and current of the DC power supply 30 reflect its power supply capacity; the power and temperature data of the energy storage inverters (first energy storage inverter 10 and second energy storage inverter 20) reflect their operating status and load conditions.

[0064] Next, the control module 40 analyzes the collected operating data. It compares this data with pre-set aging standards and parameters to determine whether the operating state of the energy storage inverter meets the aging requirements (e.g., whether the inverter temperature is too high, or whether the power output is abnormal). If the aging requirements are met, aging can begin; if not, the control module 40 generates corresponding control commands to prevent aging. Then, if the aging requirements are met, the control module 40 sends control commands to the first energy storage inverter 10 and the second energy storage inverter 20 to adjust their operating states, thereby controlling the aging process.

[0065] Control methods may include adjusting output power and changing operating modes. For example, adjusting output power means that the control module 40 can adjust the output power of the energy storage inverters (first energy storage inverter 10 and second energy storage inverter 20) to allow the energy storage inverters to operate under different load conditions, thereby simulating various operating conditions in actual use and accelerating the aging process. Changing the operating mode means controlling the various units in the energy storage inverter to switch between different operating modes, such as standby mode, full-power operation mode, and passive execution mode.

[0066] In some embodiments, the control module 40 controls the switching on and off of the inverter based on a preset aging strategy. In some embodiments, the preset aging strategy includes aging the first energy storage inverter 10 and the second energy storage inverter 20 in four stages. The four stages include a first stage, a second stage, a third stage, and a fourth stage.

[0067] Specifically, the control module 40 communicates with the DC power supply 30 via CAN communication (second communication method) to control the operation of the DC power supply 30 and acquire its operating data (such as current, voltage, power, etc.). The control module 40 also sends control commands to the first energy storage inverter 10 and the second energy storage inverter 20 via RS485 communication (first communication method) to control the first and second energy storage inverters 10 and 20 to undergo aging processes and acquire their operating data during this process.

[0068] As shown in Figure 3, in the first stage, the first MPPT unit 11 of the first energy storage inverter 10 and the second inverter unit 24 of the second energy storage inverter 20 are aged.

[0069] In the first stage, the control module 40 first sends control commands to the second energy storage inverter 20. These commands include: a command for the third MPPT unit 21 to operate in standby mode, a command for the fourth MPPT unit 22 to operate in standby mode, a command for the second inverter unit 24 to supply power to the grid at full power, and a command for the second bidirectional DC unit 23 to be passively executed. The second energy storage inverter 20 operates based on the received control commands. Next, the control module 40 sends control commands to the first energy storage inverter 10. These commands include: a command for the first MPPT unit 11 to operate at full power, a command for the second MPPT unit 12 to operate in standby mode, a command for the first inverter unit 14 to operate in standby mode, and a command for the first bidirectional DC unit 13 to be passively executed. The first energy storage inverter 10 operates based on the received control commands. At this time, referring to Figure 3, the power flow of the aging circuit 100 in the first stage of aging is sequentially: DC power supply 30, first MPPT unit 11, first bidirectional DC unit 13, second bidirectional DC unit 23, second inverter unit 24 to grid 200. The duration of the first stage is the first aging time, which is set according to actual needs, such as 2 hours. Simultaneously, during the aging process, the control module 40 acquires real-time operating data from the first energy storage inverter 10 and the second energy storage inverter 20. This operating data includes, but is not limited to, parameters such as voltage, current, power, and temperature. The control module 40 analyzes the collected operating data, comparing it with pre-set aging standard parameters to determine whether the operating status of the energy storage inverters meets the aging requirements. For example, it checks whether the power output of the second inverter unit 24 is abnormal, or whether the power output of the first MPPT unit 11 is abnormal.

[0070] As shown in Figure 4, in the second stage, the second MPPT unit 12 of the first energy storage inverter 10 and the second inverter unit 24 of the second energy storage inverter 20 are aged.

[0071] In the second stage, firstly, the control module 40 sends control commands to the second energy storage inverter 20. These commands include: a command for the third MPPT unit 21 to operate in standby mode, a command for the fourth MPPT unit 22 to operate in standby mode, a command for the second inverter unit 24 to supply power to the grid at full power, and a command for the second bidirectional DC unit 23 to be passively executed. The second energy storage inverter 20 operates based on the received control commands. Next, the control module 40 sends control commands to the first energy storage inverter 10. These commands include: a command for the first MPPT unit 11 to operate in standby mode, a command for the second MPPT unit 12 to operate at full power, a command for the first inverter unit 14 to operate in standby mode, and a command for the first bidirectional DC unit 13 to be passively executed. The first energy storage inverter 10 operates based on the received control commands. At this time, referring to Figure 4, the power flow of the aging circuit 100 in the second stage of aging is sequentially: DC power supply 30, second MPPT unit 12, first bidirectional DC unit 13, second bidirectional DC unit 23, second inverter unit 24 to grid 200. The duration of the second stage is the second aging time, which is set according to actual needs, such as 2 hours. Simultaneously, during the aging process, the control module 40 acquires real-time operating data from the first energy storage inverter 10 and the second energy storage inverter 20. This operating data includes, but is not limited to, parameters such as voltage, current, power, and temperature. The control module 40 analyzes the collected operating data, comparing it with pre-set aging standard parameters to determine whether the operating status of the energy storage inverters meets the aging requirements. For example, it checks whether the power output of the second inverter unit 24 is abnormal, or whether the power output of the second MPPT unit 12 is abnormal.

[0072] As shown in Figure 5, in the third stage, the third MPPT unit 21 of the second energy storage inverter 20 and the first inverter unit 14 of the first energy storage inverter 10 are aged.

[0073] In the third stage, firstly, the control module 40 sends control commands to the first energy storage inverter 10. These commands include: a command for the first MPPT unit 11 to operate in standby mode, a command for the second MPPT unit 12 to operate in standby mode, a command for the first inverter unit 14 to supply power to the grid at full power, and a command for the first bidirectional DC unit 13 to be passively executed. The first energy storage inverter 10 operates based on the received control commands. Next, the control module 40 sends control commands to the second energy storage inverter 20. These commands include: a command for the third MPPT unit 21 to operate at full power, a command for the fourth MPPT unit 22 to operate in standby mode, a command for the second inverter unit 24 to operate in standby mode, and a command for the second bidirectional DC unit 23 to be passively executed. The second energy storage inverter 20 operates based on the received control commands. At this time, referring to Figure 5, the power flow of the aging circuit 100 in the third stage of aging is sequentially: DC power supply 30, third MPPT unit 21, second bidirectional DC unit 23, first bidirectional DC unit 13, first inverter unit 14 to grid 200. The duration of the third stage is the third aging time, which is set according to actual needs, such as 2 hours. Simultaneously, during the aging process, the control module 40 acquires real-time operating data from the first energy storage inverter 10 and the second energy storage inverter 20. This operating data includes, but is not limited to, parameters such as voltage, current, power, and temperature. The control module 40 analyzes the collected operating data, comparing it with pre-set aging standard parameters to determine whether the operating status of the energy storage inverters meets the aging requirements. For example, it checks whether the power output of the first inverter unit 14 is abnormal, or whether the power output of the third MPPT unit 21 is abnormal.

[0074] As shown in Figure 6, in the fourth stage, the fourth MPPT unit 22 of the second energy storage inverter 20 and the first inverter unit 14 of the first energy storage inverter 10 are aged. In the fourth stage, firstly, the control module 40 sends control commands to the first energy storage inverter 10. These commands include: a command for the first MPPT unit 11 to operate in standby mode, a command for the second MPPT unit 12 to operate in standby mode, a command for the first inverter unit 14 to feed power to the grid at full power, and a command for the first bidirectional DC unit 13 to be passively executed. The first energy storage inverter 10 operates based on the received control commands. Next, the control module 40 sends control commands to the second energy storage inverter 20. These commands include: a command for the third MPPT unit 21 to operate in standby mode, a command for the fourth MPPT unit 22 to operate at full power, a command for the second inverter unit 24 to operate in standby mode, and a command for the second bidirectional DC unit 23 to be passively executed. The second energy storage inverter 20 operates based on the received control commands. At this point, referring to Figure 6, the power flow of the aging circuit 100 in the fourth stage of aging is sequentially: DC power supply 30, fourth MPPT unit 222, second bidirectional DC unit 23, first bidirectional DC unit 13, first inverter unit 14, and then to the grid 200. The duration of the fourth stage is the fourth aging time, which can be set according to actual needs, such as 2 hours. Simultaneously, during the aging process, the control module 40 acquires real-time operating data from the first energy storage inverter 10 and the second energy storage inverter 20. This operating data includes, but is not limited to, parameters such as voltage, current, power, and temperature. The control module 40 analyzes the collected operating data, comparing it with pre-set aging standard parameters to determine whether the operating state of the energy storage inverter meets the aging requirements. For example, whether the power output of the first inverter unit 14 is abnormal, or whether the power output of the fourth MPPT unit 22 is abnormal, etc.

[0075] The first energy storage inverter 10 and the second energy storage inverter 20 can be aged simultaneously using the above four stages.

[0076] Once the four aging stages are completed, if the control module 40 detects no abnormalities during the aging test, it will issue a notification indicating normal operation, such as by illuminating an indicator light (e.g., a green indicator light). At this point, the control module 40 executes the aging completion action, which includes: first disconnecting the third switch module 110, then disconnecting the contact module 90, followed by disconnecting the first switch module 60, and finally disconnecting the second switch module 70. At this point, a new energy storage inverter can be used for the aging test.

[0077] Once the four aging stages are completed, if the control module 40 detects an anomaly during the aging test, it will issue a warning, such as illuminating an indicator light (e.g., a red indicator light). This serves as a prompt for staff to troubleshoot the anomaly.

[0078] In some embodiments, when the second stage is completed, the control module 40 controls the output power of the first energy storage inverter 10 and the second energy storage inverter 20 to be reset to zero in preparation for the third stage.

[0079] Specifically, the control module 40 first sends control commands to the first energy storage inverter 10. These commands include: a command to allow the first MPPT unit 11 to operate in standby mode, a command to allow the second MPPT unit 12 to operate in standby mode, a command to allow the first inverter unit 14 to operate in standby mode, and a command to allow the first bidirectional DC unit 13 to be passively executed. The first energy storage inverter 10 operates based on the received control commands. Simultaneously, the control module 40 acquires the operating data of the first energy storage inverter 10 in real time. When the operating data of the first energy storage inverter 10 determines that its output power is 0, the control module 40 sends control commands to the second energy storage inverter 20. These commands include: a command to allow the third MPPT unit 21 to operate in standby mode, a command to allow the fourth MPPT unit 22 to operate in standby mode, a command to allow the second inverter unit 24 to operate in standby mode, and a command to allow the second bidirectional DC unit 23 to be passively executed. The first energy storage inverter 20 operates based on the received control commands. Simultaneously, the control module 40 acquires the operating data of the second energy storage inverter 20 in real time. When the output power of the second energy storage inverter 20 is determined to be 0 based on the operating data of the second energy storage inverter 20, the control module 40 controls the start of the third stage of aging test.

[0080] In some embodiments, during the aging process of the four stages described above, the discharge power of the inverter unit of the aging energy storage inverter A is configured to be greater than the output power of the MPPT unit of the aging energy storage inverter B. Since the two energy storage inverters (i.e., the first energy storage inverter 10 and the second energy storage inverter 20) are connected to only one DC power source 30, controlling the discharge power of the inverter unit of energy storage inverter A to be greater than the output power of the MPPT unit of energy storage inverter B allows the energy of the MPPT unit of energy storage inverter B to flow out from its bidirectional DC unit and be entirely used for the energy storage inverter A, preventing any energy from flowing into the DC power source 30.

[0081] In addition, during the aging process of the two energy storage inverters, the aging sequence is "turn on the inverter unit first, then turn on the MPPT unit; turn off the MPPT unit first, then turn off the inverter unit." This is to avoid energy flowing into the DC power supply 30 if only the MPPT unit is working.

[0082] In summary, this aging circuit 100 can simultaneously age the first energy storage inverter 10 and the second energy storage inverter 20. Furthermore, it uses a unified unidirectional DC power supply, facilitating centralized management and operation, simplifying the aging test process, improving testing efficiency, and reducing labor and time costs. This is beneficial for large-scale product production and quality control. Simultaneously, it also enhances the safety of the aging process.

[0083] Secondly, embodiments of this application provide an electronic device, which includes the aging circuit 100 as described above.

[0084] The structure and working principle of the aging circuit 100 can be referred to the above embodiments, and will not be repeated here.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An aging circuit, characterized in that, The aging circuit includes: a DC power supply; a first energy storage inverter and a second energy storage inverter, both connected to the DC power supply; a transformer, the primary side of which is connected to the first and second energy storage inverters, and the secondary side of which is connected to the power grid; and a control module connected to the DC power supply, the first energy storage inverter, and the second energy storage inverter, wherein the control module is used to collect operating data of the DC power supply, the first energy storage inverter, and the second energy storage inverter, and to control the first and second energy storage inverters to age based on the operating data.

2. The aging circuit according to claim 1, characterized in that, The first energy storage inverter includes: a first MPPT unit and a second MPPT unit, wherein the positive terminals of the first MPPT unit and the second MPPT unit are both connected to the positive terminal of the DC power supply, and the negative terminals of the first MPPT unit and the second MPPT unit are both connected to the negative terminal of the DC power supply; a first bidirectional DC unit, wherein the positive terminal of the first bidirectional DC unit is connected to the positive terminal of the DC power supply, and the negative terminal of the first bidirectional DC unit is connected to the negative terminal of the DC power supply; and a first inverter unit, wherein the DC terminal of the first inverter unit is simultaneously connected to the output terminal of the first bidirectional DC unit, the output terminal of the first MPPT unit, and the output terminal of the second MPPT unit, and the AC terminal of the first inverter unit is connected to the primary side of the transformer; wherein the control module is communicatively connected to the first MPPT unit, the second MPPT unit, the first bidirectional DC unit, and the first inverter unit.

3. The aging circuit according to claim 1, characterized in that, The second energy storage inverter includes: a third MPPT unit and a fourth MPPT unit, the positive terminals of the third and fourth MPPT units being connected to the positive terminal of the DC power supply, and the negative terminals of the third and fourth MPPT units being connected to the negative terminal of the DC power supply; a second bidirectional DC unit, the positive terminal of which is connected to the positive terminal of the DC power supply, and the negative terminal of which is connected to the negative terminal of the DC power supply; and a second inverter unit, the DC terminal of which is simultaneously connected to the output terminals of the second bidirectional DC unit, the third MPPT unit, and the fourth MPPT unit, and the AC terminal of which is connected to the primary side of the transformer; wherein, the control module is communicatively connected to the third MPPT unit, the fourth MPPT unit, the second bidirectional DC unit, and the second inverter unit.

4. The aging circuit according to claim 1, characterized in that, The aging circuit further includes: a first switching module connected in series between the first energy storage inverter and the transformer; and a second switching module connected in series between the second energy storage inverter and the transformer.

5. The aging circuit according to claim 1, characterized in that, The aging circuit further includes a pre-charge module, the first end of which is connected to the secondary side of the transformer, and the second end of which is connected to the power grid.

6. The aging circuit according to claim 1, characterized in that, The aging circuit further includes a contact module, the first end of which is connected to the secondary side of the transformer, and the second end of which is connected to the power grid.

7. The aging circuit according to claim 6, characterized in that, The aging circuit further includes a third switch module connected in series between the contact module and the power grid.

8. The aging circuit according to claim 1, characterized in that, The control module communicates with the first energy storage inverter and the second energy storage inverter via a first communication method.

9. The aging circuit according to claim 1, characterized in that, The control module is connected to the DC power supply via a second communication method.

10. An electronic device, characterized in that, The electronic device includes the aging circuit as described in any one of claims 1 to 9.

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