Capacitance activation circuit, capacitance activation method and electronic equipment thereof

Abstract

The embodiment of the invention discloses a capacitor activation circuit, a capacitor activation method and electronic equipment thereof. The circuit comprises a voltage detection module used for detecting the capacitor voltage of each electrolytic capacitor; the power supply module outputs working voltage based on the alternating current input voltage or the direct current input voltage; the control module is used for responding to starting of the working voltage, obtaining a time difference value between the current time and the activation ending time, and outputting an enable signal when the time difference value is greater than a first preset time threshold value; and the activation module responds to start of the enable signal, converts the working voltage into activation voltage and outputs the activation voltage to the capacitor filtering module. The control module monitors the maximum value and the difference value of the capacitor voltage in real time in the activation process, activation is stopped when the maximum value and the difference value exceed preset threshold values, and activation is completed when timing reaches a second preset time threshold value. Through the above mode, the activation of the electrolytic capacitor can be realized, the loss and the maintenance cost can be reduced, and the maintenance time can be reduced on the premise of avoiding dismounting the equipment.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of power supply equipment, and in particular to a capacitor activation circuit, a capacitor activation method and an electronic device thereof. Background Technology

[0002] In power supply equipment, electrolytic capacitors are often used as DC filtering devices. However, after being stored for a long time, the leakage current of electrolytic capacitors tends to increase. Therefore, before using electrolytic capacitors that have been stored for a long time, a certain voltage must be applied to restore their electrical characteristics to normal; this is called the activation process. In some applications, power supply equipment may not be used for extended periods or may be stored for a long time. When used again, the internal electrolytic capacitors may fail due to increased leakage current, leading to equipment malfunction or even safety accidents. Therefore, the capacitor activation function is crucial.

[0003] Current methods typically involve connecting a resistor of a certain value to the electrolytic capacitor, causing it to operate at a specific voltage for a period of time to achieve activation. This method requires an external resistor and usually necessitates disassembling the power supply equipment, which not only affects equipment operation but also increases maintenance costs. Summary of the Invention

[0004] The main technical problem solved by the embodiments of the present invention is to provide a capacitor activation circuit, a capacitor activation method and an electronic device thereof, which can solve at least some of the defects existing in the existing power supply equipment.

[0005] In a first aspect, embodiments of the present invention provide a capacitor activation circuit applied to an inverter energy storage system including a capacitor filtering module. The capacitor filtering module comprises at least one electrolytic capacitor and includes: a voltage detection module configured to detect the capacitor voltage of each electrolytic capacitor; a power supply module configured to output an operating voltage based on an AC input voltage or a DC input voltage; and a control module configured to, in response to the operating voltage, obtain a time difference value and, when the time difference value is greater than a first preset time threshold, output an enable signal; the time difference value is the difference between the current time and the activation end time recorded in the control module; the activation module is configured to, in response to the activation end time recorded in the control module, output an enable signal. The enable signal is activated, converting the working voltage into an activation voltage, and outputting the activation voltage to the capacitor filter module. The control module starts timing when the activation module outputs the activation voltage. When the timing reaches a second preset time threshold, the enable signal is stopped, and the activation end time is updated to the current time. During the timing period, if the maximum voltage exceeds a first preset voltage threshold, or the voltage difference exceeds a second preset voltage threshold, the control module stops outputting the enable signal. The maximum voltage is the maximum value among the capacitor voltages of each electrolytic capacitor, and the voltage difference is the difference between the maximum and minimum values ​​among the capacitor voltages of each electrolytic capacitor.

[0006] Optionally, the inverter energy storage system includes an AC power supply and a DC power supply. The power supply module includes: a first power supply unit configured to output a first supply voltage in response to the AC input voltage of the AC power supply; a second power supply unit configured to output a second supply voltage in response to the DC input voltage of the DC power supply; and a power supply selection unit configured to select the larger value between the first supply voltage and the second supply voltage as the operating voltage output.

[0007] Optionally, the power supply selection unit includes diodes D1 and D2. The input terminals of the first power supply unit are connected to the output terminals of the AC power supply. The positive output terminal of the first power supply unit is connected to the anode of diode D1. The cathode of diode D1 is connected to the positive input terminal of the activation module and the positive input terminal of the control module. The input terminals of the second power supply unit are connected to the output terminals of the DC power supply. The positive output terminal of the second power supply unit is connected to the anode of diode D2. The cathode of diode D2 is connected to the positive input terminal of the activation module and the positive input terminal of the control module. The negative output terminal of the first power supply unit is connected to the negative output terminal of the second power supply unit, the negative input terminal of the activation module, and the negative input terminal of the control module.

[0008] Optionally, the voltage detection module includes at least one voltage detection unit, which is connected to each of the electrolytic capacitors.

[0009] Optionally, the control module includes a storage unit and a communication unit. The storage unit is used to store the activation end time; the communication unit is used to communicate with an external device to obtain the current time; and is also used to send a fault signal to the external device when the maximum voltage exceeds the first preset voltage threshold or the voltage difference exceeds the second preset voltage threshold.

[0010] Secondly, embodiments of the present invention provide a capacitor activation method, applied to a control module in a capacitor activation circuit as described in the first aspect, comprising the following steps: obtaining a time difference based on the difference between the activation end time and the current time; determining whether the time difference exceeds a first preset time threshold; if the time difference exceeds the first preset time threshold, outputting an enable signal to start timing after the activation module outputs an activation voltage; during the timing period, determining whether the maximum voltage value exceeds a first preset voltage threshold, or whether the voltage difference exceeds a second preset voltage threshold; if the maximum voltage value exceeds the first preset voltage threshold, or the voltage difference exceeds the second preset voltage threshold, stopping the output of the enable signal and stopping the timing, and outputting a fault signal to an external device; when the timing time reaches the second preset time threshold, stopping the output of the enable signal and updating the activation end time to the current time; Optionally, before obtaining the time difference based on the difference between the activation end time and the current time, the method further includes: reading the activation end time when the operating voltage is received; and obtaining the capacitor voltage of each electrolytic capacitor in the capacitor filter module.

[0011] Optionally, before obtaining the time difference based on the difference between the activation end time and the current time, the method further includes: determining whether the activation end time is null; if the read activation end time is null, then outputting the enable signal so that the activation module outputs the activation voltage.

[0012] Thirdly, embodiments of the present invention provide an electronic device, comprising: at least one processor; at least one network interface communicatively connected to a corresponding processor; and a memory communicatively connected to the at least one processor; wherein the network interface is used to establish a communication connection between the processor and other external devices; the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the capacitor activation method as described in the second aspect.

[0013] Fourthly, embodiments of the present invention provide a non-volatile computer storage medium storing computer-executable instructions that are executed by one or more processors, causing the one or more processors to perform the capacitor activation method as described in the second aspect.

[0014] The beneficial effects of the embodiments of the present invention are as follows: Unlike the prior art, the embodiments of the present invention can activate electrolytic capacitors without disassembling the equipment, reduce losses and maintenance costs, and reduce maintenance time; and provide redundancy protection through a dual power supply architecture, avoiding the defect of DC power supply being depleted and unable to provide energy after long-term storage, thereby improving the reliability of the power supply equipment. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of a capacitor activation circuit provided in an embodiment of the present invention; Figure 2 This is a circuit diagram of a capacitor activation circuit provided in an embodiment of the present invention; Figure 3 This is a schematic flowchart of a capacitor activation method provided by an embodiment of the present invention; Figure 4 This is a schematic flowchart of another capacitor activation method provided by an embodiment of the present invention; Figure 5 This is a schematic diagram of the activation end time update process provided by an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Detailed Implementation

[0017] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0019] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0020] The technical solutions in this application will be described below with reference to the accompanying drawings.

[0021] In some embodiments of this application, combined with Figure 1 As shown, a capacitor activation circuit 100 is provided. The capacitor activation circuit 100 is applied in an inverter energy storage system, which includes an AC power supply 210, a power conversion module 220, a capacitor filter module 230, and a DC power supply 240.

[0022] The capacitor filter module 230 consists of at least one electrolytic capacitor and is used to smooth the DC voltage output by the power conversion module 220. Specifically, the function of the capacitor filter module 230 is based on the energy storage characteristics of electrolytic capacitors. When there is ripple in the DC voltage output by the power conversion module 220, the electrolytic capacitor stores electrical energy at the voltage peak and releases electrical energy at the voltage trough, thereby effectively suppressing voltage fluctuations and providing a stable DC voltage for subsequent circuits. As an example and not a limitation, after the inverter energy storage system has stored energy for a long time, the electrolytic capacitor in the capacitor filter module 230 may experience a decline in electrical characteristics due to increased dielectric leakage current, requiring the application of an appropriate activation voltage to restore its normal operating state.

[0023] The capacitor activation circuit 100 includes a power supply module 110, a voltage detection module 120, a control module 130, and an activation module 140. In some embodiments of this application, the power supply module 110 is configured to output an operating voltage based on an AC input voltage or a DC input voltage. Specifically, the power supply module 110 adopts a dual-input architecture design, capable of obtaining an AC input voltage from an AC power supply 210 and converting it into a stable DC operating voltage through an internal AC-DC conversion circuit; simultaneously, the power supply module 110 can also obtain a DC input voltage from a DC power supply 240 and convert it into a suitable operating voltage through a DC-DC conversion circuit or a voltage regulation circuit. By way of example and not limitation, the power supply module 110 has an internal power selection mechanism that can automatically select an available input power supply to ensure a stable power supply to the control module 130 and the activation module 140 even in the event of a single power supply failure.

[0024] In some embodiments of this application, the voltage detection module 120 performs real-time voltage monitoring in the capacitor activation circuit 100 and is configured to detect the capacitor voltage of each electrolytic capacitor. By way of example and not limitation, the voltage detection module 120 is implemented based on high-precision voltage sampling technology. The voltage signal is reduced to a range suitable for processing by an analog-to-digital converter (ADC) by a voltage divider circuit, and then the analog voltage signal is converted into a digital signal using a high-resolution ADC. It is easy to understand that the voltage detection module 120 can simultaneously monitor the terminal voltages of multiple electrolytic capacitors in the capacitor filtering module 230, acquiring the real-time voltage value of each electrolytic capacitor through parallel sampling or time-division multiplexing. In other embodiments, the voltage detection module 120 also has a signal conditioning function, capable of filtering the acquired voltage signal to eliminate high-frequency noise interference and ensure accurate and reliable voltage data is provided to the control module 130.

[0025] In some embodiments of this application, the control module 130 is configured to respond to the operating voltage, obtain a time difference, and output an enable signal when the time difference is greater than a first preset time threshold. As an example and not a limitation, the control module 130's functionality is based on an embedded processor architecture, integrating a clock management unit, a memory interface, and a logic operation unit. The control module 130 starts immediately upon receiving the operating voltage from the power module 110. It first reads the previously recorded activation end time from its internal memory, then obtains the current system time, and calculates the time difference using the time operation unit. Specifically, the control module 130 uses a preset time judgment algorithm to determine whether the activation process needs to be initiated. In some embodiments of this application, when the calculated time difference is greater than the first preset time threshold, it indicates that the capacitor filter module 230 has not been activated for a long time, posing a risk of electrolytic capacitor performance degradation. Therefore, the control module 130 outputs an enable signal through its digital output port to start the activation module 140. It should also be noted that the control module 130 also has an activation process monitoring function. When the activation module 140 outputs the activation voltage, the internal timer starts counting. When the counting time reaches the second preset time threshold, the control module 130 stops outputting the enable signal and updates and stores the current time as the new activation end time in the internal memory.

[0026] It should also be noted that the control module 130 implements a real-time safety monitoring mechanism during the activation process. Specifically, the control module 130 continuously receives voltage data of each electrolytic capacitor provided by the voltage detection module 120, and calculates the maximum voltage and voltage difference using an internal algorithm. In some embodiments of this application, the maximum voltage is the highest voltage among the capacitor voltages of each electrolytic capacitor, reflecting the highest voltage level that the electrolytic capacitors withstand during the activation process; the voltage difference is the difference between the maximum and minimum voltages of each electrolytic capacitor, reflecting the degree of balance in voltage distribution among the electrolytic capacitors.

[0027] The control module 130 compares the real-time calculated maximum voltage with a first preset voltage threshold and the voltage difference with a second preset voltage threshold using a comparison algorithm. Specifically, when the maximum voltage exceeds the first preset voltage threshold, it indicates that a certain electrolytic capacitor is subjected to excessive voltage, which may pose a risk of overvoltage damage; when the voltage difference exceeds the second preset voltage threshold, it indicates that the voltage distribution among the electrolytic capacitors is uneven, which may cause some capacitors to bear excessive stress. As an example and not a limitation, when any abnormal condition is triggered, the control module 130 immediately stops outputting the enable signal and terminates the activation process to protect the capacitor filter module 230.

[0028] In some embodiments of this application, the activation module 140 is configured to activate in response to an enable signal, convert the operating voltage into an activation voltage, and output the activation voltage to the capacitor filter module 230. By way of example and not limitation, the activation module 140 is implemented based on controllable power conversion technology, internally employing a switching power supply topology or a linear regulator architecture, capable of adjusting the operating voltage provided by the power module 110 to a specific voltage level that meets the activation requirements of the electrolytic capacitor.

[0029] By way of example and not limitation, the activation module 140 internally includes a voltage regulation circuit and a current limiting circuit to ensure that the output activation voltage is stable and reliable and the current is controlled. Upon receiving the enable signal from the control module 130, the activation module 140 immediately starts operating, activating the voltage conversion circuit through its internal control logic to begin providing the activation voltage to the capacitor filter module 230. In other embodiments, the activation module 140 also has a soft-start function, which can smoothly build up the activation voltage, avoiding impact on the electrolytic capacitor and ensuring the safety and effectiveness of the activation process.

[0030] In some embodiments of this application, combined with Figure 2 As shown, another specific embodiment of the capacitor activation circuit 100 is provided. In some embodiments of this application, the power module 110 includes a first power supply unit 111, a second power supply unit 112, and a power supply selection unit 113. The first power supply unit 111 is configured to output a first supply voltage Va1 in response to the AC input voltage of the AC power supply 210; the second power supply unit 112 is configured to output a second supply voltage Vd1 in response to the DC input voltage of the DC power supply 240.

[0031] By way of example and not limitation, the functional principle of the first power supply unit 111 is based on AC-to-DC power conversion technology. Specifically, the first power supply unit 111 integrates a rectifier circuit, a filter circuit, and a voltage regulator circuit. It can convert the AC input voltage provided by the AC power supply 210 into a pulsating DC signal through a rectifier bridge, then smooth the pulsating component through an inductor-capacitor filter network, and finally output a stable first supply voltage Va1 through a linear regulator or a switching regulator. In some embodiments, the first power supply unit 111 also has overvoltage protection and overcurrent protection functions to ensure safe shutdown in case of AC power failure and protect the subsequent circuits.

[0032] In some embodiments of this application, the second power supply unit 112 is responsible for converting the output of the DC power supply 240 into a second supply voltage suitable for system operation. Specifically, the second power supply unit 112 implements its function using DC-DC voltage conversion technology, and internally incorporates a DC-DC converter or voltage regulator. As an example, and not a limitation, when the DC power supply 240 is a battery pack, its output voltage may fluctuate with changes in battery charge. The second power supply unit 112 uses a Buck converter or Boost converter to regulate the battery voltage to a constant second supply voltage Vd1, ensuring stable operation of the control module 130 and the activation module 140. In other embodiments, the second power supply unit 112 also has an undervoltage protection function, automatically cutting off the output when the DC power supply 240 voltage is too low to prevent abnormal system operation.

[0033] In some embodiments of this application, the power supply selection unit 113 is configured to select the larger value between the first power supply voltage Va1 and the second power supply voltage Vd1 as the operating voltage V1 output. In some embodiments of this application, the power supply selection unit 113 includes diodes D1 and D2 to achieve seamless automatic power switching. Specifically, the functional implementation principle of the power supply selection unit 113 is based on the unidirectional conduction characteristic of diodes and OR gate logic, for the following reasons: As a semiconductor device, a diode only allows current to flow from the anode to the cathode, exhibiting a clear directionality. When the anode voltage of a diode is about 0.7V higher than the cathode voltage, the diode is in a conducting state, and current can flow through; conversely, when the anode voltage is lower than or close to the cathode voltage, the diode is cut off, preventing current from flowing.

[0034] In the circuit of the power supply selection unit 113, two diodes D1 and D2 are cleverly configured as a "hardware OR gate". Specifically, the first supply voltage Va1 is connected to the output terminal through diode D1, and the second supply voltage Vd1 is also connected to the same output terminal through diode D2. The cathodes of the two diodes converge to form the output of the working voltage V1, realizing the logic function of the OR gate, that is, the characteristic of "outputting 1 when 1 is available". When any input voltage is higher, the corresponding diode will conduct, providing power to the output.

[0035] When Va1 is greater than Vd1, diode D1 conducts in the forward direction while D2 is reverse-biased and cut off. In this case, the operating voltage V1 is mainly provided by the first supply voltage Va1, and its value is approximately equal to Va1 minus the forward voltage drop of the diodes, 0.7V. Conversely, when Vd1 is greater than Va1, diode D2 conducts while D1 is cut off, and the operating voltage V1 is provided by the second supply voltage Vd1. Therefore, the output voltage V1 is always equal to the higher of the two input voltages minus the diode voltage drop, achieving the function of automatically selecting the higher voltage power supply. This eliminates the need for any complex control circuits, relying entirely on the physical characteristics of the diodes to achieve power switching and redundancy protection.

[0036] Specifically, the input terminals of the first power supply unit 111 are connected to the output terminals of the AC power supply 210. The positive output terminal of the first power supply unit 111 is connected to the anode of diode D1. The cathode of diode D1 is connected to the positive input terminal of the activation module 140 and the positive input terminal of the control module 130. The input terminals of the second power supply unit 112 are connected to the output terminals of the DC power supply 240. The positive output terminal of the second power supply unit 112 is connected to the anode of diode D2. The cathode of diode D2 is connected to the positive input terminal of the activation module 140 and the positive input terminal of the control module 130. The negative output terminals of the first power supply unit 111, the second power supply unit 112, the activation module 140, and the control module 130 are connected to form a common ground reference point.

[0037] In some embodiments of this application, the voltage detection module 120 adopts a distributed detection architecture, undertaking the function of accurately monitoring the voltage of each electrolytic capacitor in the capacitor filtering module 230. It is easy to understand that the voltage detection module 120 includes at least one voltage detection unit, which is connected to each electrolytic capacitor to achieve independent monitoring of each electrolytic capacitor. Specifically, as... Figure 2 As shown, the voltage detection module 120 includes voltage detection units 121 to 12N, which correspond to electrolytic capacitors CAP1 to CAPn in the capacitor filter module 230, respectively.

[0038] As an example, and not a limitation, the functional principle of each voltage detection unit is based on high-impedance voltage sampling technology. Specifically, each voltage detection unit internally incorporates a high-precision voltage divider and a buffer amplifier. This allows the voltage signal across the electrolytic capacitor to be reduced to a suitable voltage range for subsequent processing via a resistor divider network. The signal is then buffered by a high-input-impedance operational amplifier to ensure that the sampling process does not affect the load on the circuit under test. In other embodiments, each voltage detection unit also integrates an anti-interference filter circuit, which effectively suppresses electromagnetic interference and high-frequency noise, ensuring that an accurate and stable voltage detection signal is provided to the control module 130.

[0039] In some embodiments of this application, the control module 130 adopts a modular design architecture, undertaking the functions of intelligent control and data management of the activation process. Specifically, the control module 130 includes a storage unit 131 and a communication unit 132, realizing the integration of data storage and external communication functions. It is easy to understand that the storage unit 131 is used to store the activation end time, providing historical data support for the determination of the activation cycle.

[0040] As an example and not a limitation, the functional principle of storage unit 131 is based on non-volatile memory technology. Specifically, storage unit 131 employs power-off retention storage devices such as EEPROM, Flash memory, or ferroelectric memory, which can retain critical data such as activation end time even after system power failure. It is easy to understand that storage unit 131 has an internal data verification mechanism that ensures the integrity and reliability of stored data through CRC checksums or ECC error correction codes. In some other embodiments of this application, storage unit 131 also has a data backup function, redundantly storing important data in multiple storage areas to further improve data security.

[0041] In some embodiments of this application, the communication unit 132 communicates with external devices to obtain information such as the current time and time zone for local time synchronization; it is also used to send a fault signal to the external device when the maximum voltage exceeds a first preset voltage threshold, or the voltage difference exceeds a second preset voltage threshold. As an example and not a limitation, the functional implementation principle of the communication unit 132 is based on digital communication protocol stack technology. The communication unit 132 integrates a communication interface controller and a protocol processor, supporting multiple communication methods such as RS485, Ethernet, WiFi, or Bluetooth.

[0042] The communication unit 132 also possesses bidirectional communication capabilities, enabling it to not only send status information but also receive time information, control commands, and parameter configuration commands from external devices, thus achieving remote monitoring, time synchronization, and parameter adjustment functions. Specifically, the communication unit 132 can communicate with external devices, sending request commands to them so that the external devices respond to the request commands by sending information such as the current time and time zone to the communication unit. Furthermore, the communication unit 132 can also encapsulate the activation status information, voltage monitoring data, and fault alarm information detected by the control module 130 into standard communication data packets, which are then sent to external devices, such as external monitoring equipment or host computer systems, through the corresponding communication interfaces. Unlike existing technologies, the embodiments of the present invention can activate electrolytic capacitors without disassembling the equipment, reducing losses and maintenance costs, and shortening maintenance time; and provide redundancy through a dual power supply architecture to avoid the defect of the DC power supply being depleted and unable to provide energy after long-term storage, thereby improving the reliability of the power supply equipment.

[0043] In some embodiments of this application, combined with Figure 3 As shown, a capacitor activation method is provided. This capacitor activation method is applied to the control module in the capacitor activation circuit provided in any of the above embodiments, and specifically includes the following steps: Step P100: Obtain the time difference based on the difference between the activation end time and the current time.

[0044] In some embodiments of this application, after receiving the operating voltage and completing system initialization, the control module 130 synchronizes the system time with the external device, calibrates the time zone and time, and initiates the time difference calculation function. As an example and not a limitation, the time difference calculation step is implemented based on time synchronization protocols, real-time clock management, and data retrieval technology. The control module 130 first reads the previously recorded activation end time data from its internal storage unit, then synchronizes the system time with the external device through its internal communication unit to obtain the current system time, and performs a subtraction operation through its built-in time calculation unit to calculate the difference between the two time points.

[0045] Specifically, the time processing algorithm inside the control module 130 can handle the conversion of different time formats, uniformly converting time information such as year, month, day, hour, minute, and second into a standard timestamp format for calculation. In some embodiments of this application, the time difference is usually expressed in hours or days, which facilitates subsequent comparison and judgment with a preset time threshold. As an example and not a limitation, when the last activation end time was January 1, 2024, and the current time is July 1, 2024, the calculated time difference is 6 months or approximately 180 days.

[0046] Step P200: Determine whether the time difference exceeds the first preset time threshold.

[0047] In some embodiments of this application, the function of the judgment step is implemented based on numerical comparison algorithms and decision logic processing. Specifically, the control module compares the time difference calculated in step P100 with a preset first time threshold. Specifically, the first preset time threshold is usually set according to the technical specifications of the electrolytic capacitor and the manufacturer's recommendations, and generally ranges from 6 months to 1 year.

[0048] The first preset time threshold represents the maximum time interval during which an electrolytic capacitor can maintain good electrical characteristics under normal storage conditions. It's easy to understand that when the time difference is less than the first preset time threshold, it indicates that the electrolytic capacitor is still within a safe storage period and does not require activation. The control module will remain in standby mode, waiting to execute other instructions. When the time difference exceeds the first preset time threshold, the control module determines that the activation process needs to be initiated and proceeds to the next step.

[0049] Step P300: Output an enable signal so that the activation module outputs an activation voltage and then the timing begins.

[0050] In some embodiments of this application, the function of the enable signal output step is based on digital signal output control and timer management technology. Specifically, the control module 130 sends a logic high-level enable signal to the activation module through its internal GPIO controller or dedicated signal output port.

[0051] As an example, and not a limitation, the control module first sets its internal status register to mark the start of the activation process. Then, it activates the timer module to prepare for the timing function. Next, it transmits an enable signal to the activation module via the signal output drive circuit. It's easy to understand that the timing control of the enable signal is crucial. The control module ensures that the internal timer only officially starts timing after the activation module receives the enable signal and begins outputting the activation voltage, guaranteeing timing accuracy and synchronization. Specifically, the timer uses a high-precision crystal oscillator as its clock source, providing millisecond-level timing accuracy.

[0052] Step P400: Determine whether the maximum voltage value exceeds the first preset voltage threshold, or whether the voltage difference exceeds the second preset voltage threshold.

[0053] In some embodiments of this application, the voltage monitoring and judgment step is implemented based on real-time data acquisition and multi-parameter parallel monitoring technology. Specifically, the control module continuously receives voltage data from each electrolytic capacitor from the voltage detection module and calculates the maximum voltage and voltage difference in real time using an internal data processing algorithm.

[0054] As an example, and not a limitation, the comparison algorithm inside the control module sequentially reads the capacitor voltage data provided by each voltage detection unit, and finds the voltage value with the largest value through cyclic comparison as the maximum voltage value. The calculation of the voltage difference requires finding both the maximum and minimum voltage values, and then performing a subtraction operation to obtain the difference result. The voltage difference reflects the uniformity of the voltage distribution among the electrolytic capacitors.

[0055] The control module compares the real-time calculated maximum voltage with a first preset voltage threshold, and simultaneously compares the voltage difference with a second preset voltage threshold. In some embodiments of this application, the first preset voltage threshold is typically set as the upper limit of the rated voltage or safe operating voltage of the electrolytic capacitor to prevent any single capacitor from being damaged by excessive voltage. The second preset voltage threshold is set according to the voltage equalization requirements of the capacitor series system to ensure that the voltage distribution among the capacitors remains within a reasonable range.

[0056] Step P500: Stop outputting the enable signal and update the activation end time to the current time.

[0057] When the activation process proceeds normally without any abnormalities, the control module executes a normal termination step. Specifically, when the timer reaches a second preset time threshold, it stops outputting the enable signal and updates the activation end time to the current time. In some embodiments of this application, the normal termination step is implemented based on timing control and data update management technologies. Specifically, the control module's timer continuously monitors the duration of the activation process, and when the accumulated time reaches a preset second preset time threshold, it determines that the activation process has been completed.

[0058] The setting of the second preset time threshold is based on the technical requirements and empirical data for electrolytic capacitor activation. The activation time usually needs to be long enough to ensure that the electrical characteristics of the electrolytic capacitor are fully restored, but it should not be too long to avoid unnecessary energy consumption and equipment aging. In some embodiments of this application, when the timer indicates that the activation time has arrived, the control module executes a normal termination sequence, including stopping the output enable signal, stopping the timer, acquiring the current system time and writing it as the new activation termination time into the storage unit.

[0059] It is easy to understand that updating the activation end time provides an accurate time reference for determining the next activation cycle. Specifically, the control module stores the current time in a standard format in non-volatile memory, overwriting the previous activation end time record to ensure the timeliness and accuracy of the data. In some embodiments of this application, the storage operation also includes data verification and backup mechanisms to further ensure the reliability and integrity of the time data.

[0060] Step P600: Stop outputting the enable signal and stop timing, and output a fault signal to an external device.

[0061] When voltage monitoring detects an abnormality, i.e., the maximum voltage exceeds a first preset voltage threshold, or the voltage difference exceeds a second preset voltage threshold, the control module executes fault handling steps. In some embodiments of this application, the fault handling steps are implemented based on a fast response and multiple protection mechanisms. It is easy to understand that the control module immediately executes an emergency stop sequence upon detecting any abnormal condition.

[0062] Specifically, the emergency stop sequence includes multiple synchronously executed actions. As an example, and not a limitation, the control module first sets the enable signal output to a logic low level, cutting off the control signal to the activation module, causing the activation module to stop outputting the activation voltage. In some embodiments of this application, the control module simultaneously stops the operation of the internal timer, saves the current timing state, and sets a fault flag bit to record the time and type of the abnormality. The fault signal output function is implemented through a communication unit, sending fault information in a standardized data format to external monitoring equipment or a host computer system, facilitating maintenance personnel to promptly understand the equipment status and take appropriate measures.

[0063] In some embodiments of this application, combined with Figure 4 As shown, another capacitor activation method is provided, which is different from the method described in this embodiment. Figure 3 The capacitor activation method provided in the illustrated embodiment adds more preprocessing steps and boundary condition handling, specifically including the following steps: Step S100: Upon receiving the operating voltage, read the activation end time.

[0064] In some embodiments of this application, the control module first performs a read operation of the activation end time during the system power-on initialization phase. As an example and not a limitation, the implementation principle of reading the activation end time is based on non-volatile memory access and data recovery technology. Specifically, the control module accesses the internal storage unit through the memory interface controller and reads the previously recorded activation end time data from a predetermined storage address.

[0065] As an example and not a limitation, the memory read process includes multiple sub-operations. Specifically, the control module first activates the memory chip selection signal, then sends the read address information, and then retrieves the stored time data from the data bus. In some embodiments of this application, the read operation also includes a data integrity verification function, which verifies the correctness of the read data using a CRC checksum or checksum algorithm to ensure that the time information is not damaged due to memory aging or electromagnetic interference. It is easy to understand that if the data verification fails, the control module will mark the data as invalid, preparing for the subsequent null value judgment step.

[0066] Step S200: Obtain the capacitor voltage of each electrolytic capacitor in the capacitor filter module.

[0067] In some embodiments of this application, the control module immediately initiates the voltage data acquisition function after completing the activation end time reading. As an example and not a limitation, the voltage acquisition step is implemented based on multi-channel parallel sampling and data synchronization technology. Specifically, the control module simultaneously acquires the voltage values ​​of all electrolytic capacitors at the current moment from each voltage detection unit through the communication interface with the voltage detection module 120.

[0068] As an example and not a limitation, the voltage data acquisition process employs a synchronous sampling strategy to ensure data temporal consistency. Specifically, the control module sends a sampling trigger signal to the voltage detection module 120. Each voltage detection unit simultaneously performs A / D conversion under the control of a unified clock signal, and then transmits the digitized voltage data to the control module via a serial or parallel interface. In some embodiments of this application, the control module also performs digital filtering on the received voltage data to eliminate transient interference and measurement noise, ensuring the accuracy of subsequent calculations and judgments.

[0069] Step S300: Determine whether the activation end time is null.

[0070] In some embodiments of this application, the control module performs a validity check on the activation end time read from the memory. As an example and not a limitation, the null value judgment step is implemented based on data validity checks and boundary condition handling techniques. Specifically, the control module checks whether the read time data is a predefined null value identifier, such as all-zero data, all-one data, or a specific invalid timestamp.

[0071] As an example, and not a limitation, null value detection includes multiple verification mechanisms. Specifically, the control module first checks whether the format of the time data conforms to the expected standard, and then verifies whether the time value is within a reasonable range, such as whether the year is within a valid range and whether the month is within the range of 1-12. In some embodiments of this application, the control module also checks whether the time data is the default value at the time of system factory default or the initial value after reset. When a null value is detected for the activation end time, it indicates that the system is starting up for the first time or that stored data has been lost, requiring special processing procedures to be executed.

[0072] When step S300 determines that the activation end time is null, the control module directly jumps to step S600, the activation execution stage. Specifically, the control module outputs an enable signal to the activation module 140 to start the activation voltage output. As an example and not a limitation, the activation process in the null case is exactly the same as the normal activation process, including functions such as timing control, voltage monitoring, and safety protection. In some embodiments of this application, the control module sets a special flag bit during the null-triggered activation process to record the activation reason, facilitating subsequent system diagnosis and maintenance management.

[0073] Step S400: Obtain the time difference based on the difference between the activation end time and the current time.

[0074] Step S500: Determine whether the time difference exceeds the first preset time threshold.

[0075] Step S600: Output an enable signal so that the activation module outputs an activation voltage and then the timing begins.

[0076] Step S700: Determine whether the maximum voltage value exceeds the first preset voltage threshold, or whether the voltage difference exceeds the second preset voltage threshold.

[0077] Step S800: Stop outputting the enable signal and update the activation end time to the current time.

[0078] Step S900: Stop outputting the enable signal and stop timing, and output a fault signal to an external device.

[0079] The above steps S400-S900 and Figure 3 Steps P100-P600 in the capacitor activation method shown are the same and will not be described again here.

[0080] It should be noted that the above-mentioned capacitor activation method mainly operates in the standby state of the energy storage inverter system. It is easy to understand that when the energy storage inverter system is in standby mode, the electrolytic capacitors inside the system are in a static state for a long time, and may require activation due to increased leakage current. Therefore, the control module 130 will activate the capacitors according to the specified method. Figure 3 or Figure 4 The process shown executes activation judgment and control.

[0081] In some embodiments of this application, it should be specifically noted that the above-described capacitor activation method mainly operates in the standby state of the energy storage inverter system. When the energy storage inverter system is in standby mode, the electrolytic capacitors inside the system remain in a static state for a long time, and may require activation due to increased leakage current. To accurately determine the necessity of capacitor activation, the control module 130 also needs to perform a time recording update function during the normal operation of the energy storage inverter system to ensure that the time information recorded in the storage unit can accurately reflect the last active time of the energy storage inverter system. The flowchart is shown below. Figure 5 As shown, the specific steps include the following: Step X100: The energy storage inverter system is powered on and operates normally.

[0082] In some embodiments of this application, when the energy storage inverter system transitions from a standby state to a normal operating state, the control module 130 first performs system state identification and switching operations. Specifically, the control module 130 determines whether the system has entered a normal operating mode by monitoring key parameters such as the main power circuit status, load connection status, and power conversion activities of the energy storage inverter system.

[0083] As an example and not a limitation, the operational status identification process involves a comprehensive evaluation of multiple judgment conditions. Specifically, the control module 130 detects whether the power conversion module 220 is working properly, monitors whether the DC bus voltage is stable, verifies whether the load current is within the normal range, and confirms whether the system protection functions are responding normally. In some embodiments of this application, the control module 130 only confirms that the energy storage inverter system has successfully entered normal operation when all operational status indicators meet preset conditions.

[0084] When the energy storage inverter system is operating normally, the electrolytic capacitors in the capacitor filter module 230 are in a continuous charging and discharging state, and their electrical characteristics can be effectively maintained, so no additional activation treatment is usually required. In some embodiments of this application, after confirming that the system is operating normally, the control module 130 will suspend the activation monitoring function in the standby state and instead perform the time recording and management task during operation.

[0085] Step X200: Update the activation end time to the current time according to the preset time interval.

[0086] In some embodiments of this application, the control module 130 performs a periodic time recording update function during the normal operation of the energy storage inverter system. The function of the time update step is based on timed task scheduling and non-volatile memory management technology. Specifically, the control module 130 has a dedicated timer module that triggers the time update operation according to a preset time interval, writing the current system time into the storage unit 131 and overwriting the previously recorded activation end time.

[0087] Setting the preset time interval requires a comprehensive consideration of the balance between memory write lifespan and time recording accuracy. Specifically, setting the time interval too short will increase the number of writes to the memory unit, potentially affecting its lifespan; setting the time interval too long may reduce the accuracy of time recording. In some embodiments of this application, the preset time interval is typically set to a suitable period such as 24 hours, 48 ​​hours, or 72 hours, which ensures the relative accuracy of time recording while avoiding excessive use of the memory unit.

[0088] The execution process of the periodic time update operation includes multiple security measures. Specifically, before executing the update operation, the control module 130 first verifies the validity of the current system time, confirming that the clock system is working normally and the time data format is correct. In some embodiments of this application, the time update process also includes a data backup and verification mechanism. While writing the new time data to the main storage area, the control module 130 also performs redundant storage in the backup storage area and generates a corresponding checksum to verify data integrity.

[0089] As an example, not a limitation, after the time update operation is completed, the "activation end time" recorded in the storage unit actually represents the time point of the last normal operation of the energy storage inverter system. Specifically, when the energy storage inverter system continues to operate normally, the time record in the storage unit will be updated to the latest time periodically; when the system is shut down and enters standby mode, the storage unit retains the time update record for the last period of system operation.

[0090] Therefore, the activation end time is not simply the time when the capacitor activation ends. The time difference serves as the basis for determining whether the capacitor needs activation. The activation end time, when the energy storage inverter system did not perform capacitor activation in the previous operation, refers to the time when the energy storage inverter system last stopped working. This invention also provides an electronic device based on the above-described capacitor activation method, the schematic diagram of which is shown below. Figure 5 As shown, the electronic device 500 includes: One or more processors 501, a network interface 502, and a memory 503, Figure 5 The example consists of a processor 501, a network interface 502, and a memory 503.

[0091] The network interface 502 is communicatively connected to the corresponding processor 501. The processor 501 and the memory 502 can be connected via a bus or other means. Figure 5 Taking the example of a connection between China and Israel via a bus.

[0092] Network interface 502 is used to establish communication connections between processor 501 and other external devices, including the following types: RJ-45 interface, SC fiber optic interface, AUI interface, FDDI interface and Console interface.

[0093] The memory 503, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The processor 501 executes various functional applications and data processing of the electronic device by running the non-volatile software programs, instructions, and units stored in the memory 503, thereby implementing the capacitor activation method of the above-described method embodiment.

[0094] Memory 503 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the electronic device. Furthermore, memory 503 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 503 may optionally include memory remotely located relative to the processor, which can be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0095] The one or more units are stored in memory 503. When executed by one or more processors, they perform the capacitor activation method in any of the above method embodiments, for example, the method described above. Figure 3 Method steps P100 to P600, or Figure 4 Method steps S100 to S900.

[0096] The aforementioned electronic device can execute the capacitor activation method provided in the embodiments of the present invention, and has the corresponding program modules and beneficial effects for executing the method. Technical details not described in detail in the embodiments of the electronic device can be found in the capacitor activation method provided in the embodiments of the present invention.

[0097] This invention also provides a non-volatile computer-readable storage medium, which may be included in the device described in the above embodiments; or it may exist independently and not assembled into the device. The non-volatile computer-readable storage medium carries one or more programs, which, when executed, implement the capacitor activation method of this disclosure.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above. For the sake of brevity, they are not provided in detail; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for 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 application.

Claims

1. A capacitor activation circuit, applied to an inverter energy storage system including a capacitor filter module, wherein the capacitor filter module comprises at least one electrolytic capacitor, characterized in that, include: The voltage detection module is configured to detect the capacitor voltage of each electrolytic capacitor; The power module is configured to output an operating voltage based on either an AC or DC input voltage. The control module is configured to start in response to the operating voltage, obtain a time difference, and output an enable signal when the time difference is greater than a first preset time threshold. The time difference is the difference between the current time and the activation end time recorded in the control module; The activation module is configured to activate in response to the enable signal, convert the operating voltage into an activation voltage, and output the activation voltage to the capacitor filter module; The control module starts timing when the activation module outputs the activation voltage, and stops outputting the enable signal when the timing reaches the second preset time threshold, and updates the activation end time to the current time. During the timing period, if the maximum voltage exceeds the first preset voltage threshold, or the voltage difference exceeds the second preset voltage threshold, the control module stops outputting the enable signal; the maximum voltage is the maximum value among the capacitor voltages of each electrolytic capacitor, and the voltage difference is the difference between the maximum and minimum values ​​among the capacitor voltages of each electrolytic capacitor.

2. The circuit according to claim 1, wherein the inverter energy storage system comprises an AC power supply and a DC power supply, characterized in that, The power module includes: The first power supply unit is configured to output a first supply voltage in response to the AC input voltage of the AC power supply; The second power supply unit is configured to output a second power supply voltage in response to the DC input voltage of the DC power supply; The power supply selection unit is configured to select the larger value between the first power supply voltage and the second power supply voltage as the operating voltage output.

3. The circuit according to claim 2, characterized in that, The power supply selection unit includes diode D1 and diode D2. The input terminal of the first power supply unit is connected to the output terminal of the AC power supply. The positive output terminal of the first power supply unit is connected to the anode of diode D1. The cathode of diode D1 is connected to the positive input terminal of the activation module and the positive input terminal of the control module. The input terminal of the second power supply unit is connected to the output terminal of the DC power supply. The positive output terminal of the second power supply unit is connected to the anode of the diode D2. The cathode of the diode D2 is connected to the positive input terminal of the activation module and the positive input terminal of the control module. The negative output terminal of the first power supply unit is connected to the negative output terminal of the second power supply unit, the negative input terminal of the activation module, and the negative input terminal of the control module.

4. The circuit according to claim 1, characterized in that, The voltage detection module includes at least one voltage detection unit, and each voltage detection unit is connected to one of the electrolytic capacitors.

5. The circuit according to claim 1, characterized in that, The control module includes a storage unit and a communication unit. The storage unit is used to store the activation end time; The communication unit is used to communicate with external devices to obtain the current time; It is also used to send a fault signal to an external device when the maximum voltage exceeds the first preset voltage threshold or the voltage difference exceeds the second preset voltage threshold.

6. A capacitor activation method, applied to a control module in a capacitor activation circuit as described in any one of claims 1-5, characterized in that, Includes the following steps: The time difference is obtained by comparing the activation end time with the current time. Determine whether the time difference exceeds a first preset time threshold. If the time difference exceeds the first preset time threshold, an enable signal is output so that the activation module outputs an activation voltage and starts timing. During the timing period, it is determined whether the maximum voltage value exceeds the first preset voltage threshold, or whether the voltage difference exceeds the second preset voltage threshold. If the maximum voltage exceeds the first preset voltage threshold, or the voltage difference exceeds the second preset voltage threshold, then the enable signal will be stopped and the timing will be stopped, and a fault signal will be output to an external device. When the timing reaches the second preset time threshold, the enable signal is stopped from being output, and the activation end time is updated to the current time.

7. The method according to claim 6, characterized in that, Before obtaining the time difference based on the difference between the activation end time and the current time, the method further includes: Upon receiving the operating voltage, the activation end time is read; Obtain the capacitor voltage of each electrolytic capacitor in the capacitor filtering module.

8. The method according to claim 6, characterized in that, Before obtaining the time difference based on the difference between the activation end time and the current time, the method further includes: Determine whether the activation end time is a null value; If the activation end time read is null, then the enable signal is output so that the activation module outputs the activation voltage.

9. An electronic device, characterized in that, include: At least one processor; At least one network interface, which is communicatively connected to a corresponding processor; as well as, A memory communicatively connected to the at least one processor; wherein, The network interface is used to establish communication connections between the processor and other external devices; The memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform the capacitor activation method as described in any one of claims 6-8.

10. A non-volatile computer storage medium, characterized in that, The computer storage medium stores computer-executable instructions that are executed by one or more processors, causing the one or more processors to perform the capacitor activation method as described in any one of claims 6-8.

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