Direct-current power supply aging test method, device and system

Abstract

The invention relates to the technical field of electrical parameter measurement, in particular to a direct-current power supply aging test method, device and system, and the method comprises the steps: obtaining the monitoring data of a bidirectional direct-current power supply in an aging test process in a high-temperature environment; determining a first stability parameter according to the first current data and the first voltage data at the adjacent moments; determining the switching duration according to the detection termination moment of the first monitoring period and the detection starting moment of the second monitoring period; determining the similarity between the current fluctuation and the voltage fluctuation after switching according to the second current data and the second voltage data at the adjacent moments; according to the first stability parameter, the switching duration and the similarity, determining a first number of monitoring periods in a stable state when the bidirectional DC power supply performs current switching; and determining an aging test result of the bidirectional DC power supply according to the second number and the first number of the total monitoring periods of the bidirectional DC power supply. According to the invention, the accuracy of the aging test result of the bidirectional DC power supply is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical parameter measurement, and in particular to a direct current power supply aging test method, device and system. Background Art

[0002] A bidirectional DC power supply is a power supply device that can transmit electrical energy in two directions. It can be used as a power supply to charge a load, or as a load to absorb energy from an external power supply. A bidirectional DC power supply can switch between forward and reverse directions to achieve a bidirectional flow of energy. As bidirectional DC power supplies are used continuously, they will age, so aging detection of bidirectional DC power supplies is required.

[0003] In some scenarios, the bidirectional DC power supply is placed in a high-temperature environment for aging detection, and the stability of the bidirectional DC power supply is used to detect whether the bidirectional DC power supply is aged. However, for the bidirectional DC power supply, due to the current switching operation, the high temperature environment will combine with the temperature rise phenomenon of the internal components of the bidirectional DC power supply to increase the resistance, thereby affecting the switching efficiency of the bidirectional DC power supply. In this way, by detecting the stability of the bidirectional DC power supply to perform aging detection on the bidirectional DC power supply, the aging test results of the bidirectional DC power supply may be different from the actual situation, resulting in low accuracy of the aging test results of the bidirectional DC power supply. Summary of the invention

[0004] In order to solve the technical problem of low accuracy of aging test results of bidirectional DC power supply, the object of the present invention is to provide a DC power supply aging test method, device and system, and the technical scheme adopted is as follows: In the first aspect, an embodiment of the present invention provides a DC power supply aging test method, comprising: obtaining monitoring data of a bidirectional DC power supply during an aging test in a high temperature environment, the monitoring data comprising first current data and first voltage data of the bidirectional DC power supply in a first monitoring cycle in a positive direction, and second current data and second voltage data of the bidirectional DC power supply in a second monitoring cycle in a reverse direction; determining a first stability parameter of the first monitoring cycle based on the first current data and the first voltage data at each adjacent moment; determining a switching duration when the bidirectional DC power supply performs cycle switching based on an end detection moment of the first monitoring cycle and a start detection moment of the second monitoring cycle; determining similarity between current fluctuations and voltage fluctuations of the bidirectional DC power supply after cycle switching based on the second current data and the second voltage data at each adjacent moment; determining a first number of monitoring cycles in which the bidirectional DC power supply is in a stable state when performing current switching based on the first stability parameter, the switching duration and the similarity; determining an aging test result of the bidirectional DC power supply based on the second number and the first number of total monitoring cycles of the bidirectional DC power supply.

[0005] Optionally, determining the first stability parameter of the first monitoring period based on the first current data and the first voltage data at each adjacent moment includes: calculating a first difference sequence of the first difference between the first current data at each adjacent moment in the first monitoring period, a second difference sequence of the second difference between the first voltage data at each adjacent moment, a first ratio between the first current data at each adjacent moment, and a second ratio between the first voltage data at each adjacent moment; determining a first fluctuation coefficient of the forward current in the positive test direction based on the first difference sequence and the first ratio, and determining a second fluctuation coefficient of the forward voltage in the positive test direction based on the second difference sequence and the second ratio; and determining the first stability parameter of the first monitoring period using the first fluctuation coefficient, the second fluctuation coefficient, the maximum current value, and the maximum voltage value in the first monitoring period.

[0006] Optionally, determining the first fluctuation coefficient of the forward current in the positive test direction according to the first difference sequence and the first ratio includes: calculating the first average value of the first ratio between the first current data at each adjacent moment; determining the maximum value of the first difference from the first difference sequence; determining the first product of the first average value and the maximum value of the first difference as the first fluctuation coefficient; determining the second fluctuation coefficient of the forward voltage in the positive test direction according to the second difference sequence and the second ratio includes: calculating the second average value of the second ratio between the first voltage data at each adjacent moment; determining the maximum value of the second difference from the second difference sequence; determining the second product of the second average value and the maximum value of the second difference as the second fluctuation coefficient.

[0007] Optionally, determining the first stability parameter of the first monitoring period using the first fluctuation coefficient, the second fluctuation coefficient, the maximum current value and the maximum voltage value within the first monitoring period includes: calculating a third ratio between the first fluctuation coefficient and the second fluctuation coefficient, and an absolute value of a third difference between the third ratio and a preset value; calculating a fourth ratio between the maximum current value and the maximum voltage value, and calculating a third product between the absolute value of the third difference and the fourth ratio; and normalizing the third product to obtain the first stability parameter.

[0008] Optionally, determining the similarity between the current fluctuation and the voltage fluctuation of the bidirectional DC power supply after periodic switching based on the second current data and the second voltage data at each adjacent moment includes: calculating a third difference sequence of the fourth difference between the second current data at each adjacent moment in the second monitoring period, a fourth difference sequence of the fifth difference between the second voltage data at each adjacent moment, a fifth ratio between the second current data at each adjacent moment, and a sixth ratio between the second voltage data at each adjacent moment; determining a third fluctuation coefficient of the bidirectional DC power supply after switching based on the third difference sequence and the fifth ratio, and determining a fourth fluctuation coefficient of the bidirectional DC power supply after switching based on the fourth difference sequence and the sixth ratio; determining a first recovery time of the bidirectional DC power supply from a current fluctuation state to a stable state after switching based on the third fluctuation coefficient and determining a second recovery time of the bidirectional DC power supply from a voltage fluctuation state to a stable state after switching based on the fourth fluctuation coefficient; determining a second stability parameter of the second monitoring period based on the third fluctuation coefficient, the fourth fluctuation coefficient, and the maximum current value and the maximum voltage value in the second monitoring period; and determining the similarity between the current fluctuation and the voltage fluctuation of the bidirectional DC power supply after switching based on the first recovery time, the second recovery time, and the second stability parameter.

[0009] Optionally, determining the third fluctuation coefficient of the bidirectional DC power supply after switching according to the third difference sequence and the fifth ratio includes: selecting the maximum value of the fourth difference from the third difference sequence; calculating the reciprocal of the absolute value of the sixth difference between the fifth ratio and the preset value, and calculating the fourth product between the reciprocal of the absolute value of the sixth difference and the maximum value of the fourth difference; normalizing the fourth product to obtain the third fluctuation coefficient; determining the fourth fluctuation coefficient of the bidirectional DC power supply after switching according to the fourth difference sequence and the sixth ratio includes: selecting the maximum value of the fifth difference from the fourth difference sequence; calculating the reciprocal of the absolute value of the seventh difference between the sixth ratio and the preset value, and calculating the fifth product between the reciprocal of the absolute value of the seventh difference and the maximum value of the fifth difference; normalizing the fifth product to obtain the fourth fluctuation coefficient.

[0010] Optionally, determining the similarity between the current fluctuation and the voltage fluctuation of the bidirectional DC power supply after switching based on the first recovery time, the second recovery time and the second stability parameter includes: calculating the reciprocal of the absolute value of the eighth difference between the first recovery time and the second recovery time; and determining the sixth product between the reciprocal of the absolute value of the eighth difference and the second stability parameter as the similarity.

[0011] Optionally, determining a first number of monitoring cycles in which the bidirectional DC power supply is in a stable state when performing current switching according to a first stability parameter, switching duration and similarity includes: determining a stable state recovery index of the bidirectional DC power supply when performing current switching after the first monitoring cycle is completed according to the first stability parameter, switching duration and similarity; determining a coefficient of variation between stable state recovery indexes in adjacent monitoring cycles according to the stable state recovery indexes of adjacent monitoring cycles; determining an influencing parameter of the bidirectional DC power supply that affects the stability of the bidirectional DC power supply when the current is switched according to the coefficient of variation and the switching duration of adjacent monitoring cycles; normalizing the influencing parameter using an inverse min-max function to obtain a normalized value; marking the monitoring cycles whose normalized values ​​are greater than a threshold value to obtain the first number of monitoring cycles in which the bidirectional DC power supply is in a stable state when performing current switching.

[0012] In a second aspect, an embodiment of the present invention provides a DC power supply aging test device, comprising: an acquisition module, used to acquire monitoring data of a bidirectional DC power supply during an aging test in a high temperature environment, the monitoring data comprising first current data and first voltage data of the bidirectional DC power supply in a first monitoring cycle in a positive direction, and second current data and second voltage data of the bidirectional DC power supply in a second monitoring cycle in a reverse direction; a determination module, used to determine a first stability parameter of the first monitoring cycle based on the first current data and the first voltage data at each adjacent moment; the determination module, further used to determine a switching duration when the bidirectional DC power supply performs cycle switching based on an end detection moment of the first monitoring cycle and a start detection moment of the second monitoring cycle; the determination module, further used to determine the similarity between current fluctuations and voltage fluctuations of the bidirectional DC power supply after cycle switching based on the second current data and the second voltage data at each adjacent moment; the determination module, further used to determine a first number of monitoring cycles in which the bidirectional DC power supply is in a stable state when performing current switching based on the first stability parameter, the switching duration and the similarity; the determination module, further used to determine the aging test result of the bidirectional DC power supply based on the second number and the first number of the total monitoring cycles of the bidirectional DC power supply.

[0013] In a third aspect, an embodiment of the present invention provides a DC power supply aging test system, comprising: a processor and a memory; wherein the memory is used to store a computer program that can be run on the processor; and the processor is used to execute the program stored in the memory to implement the steps of the DC power supply aging test method mentioned in the first aspect.

[0014] The present invention has the following beneficial effects: first, monitoring data of a bidirectional direct current power supply during an aging test in a high temperature environment is obtained, the monitoring data including first current data and first voltage data of the bidirectional direct current power supply in a first monitoring cycle in a positive direction, and second current data and second voltage data of the bidirectional direct current power supply in a second monitoring cycle in a reverse direction; then, a first stability parameter of the first monitoring cycle is determined according to the first current data and the first voltage data at each adjacent moment; then, a switching duration when the bidirectional direct current power supply performs cycle switching is determined according to the end detection moment of the first monitoring cycle and the start detection moment of the second monitoring cycle; secondly, the similarity between current fluctuations and voltage fluctuations of the bidirectional direct current power supply after cycle switching is determined according to the second current data and the second voltage data at each adjacent moment; and a first number of monitoring cycles in which the bidirectional direct current power supply is in a stable state when performing current switching is determined according to the first stability parameter, the switching duration and the similarity; finally, an aging test result of the bidirectional direct current power supply is determined according to the second number and the first number of the total monitoring cycles of the bidirectional direct current power supply.

[0015] In this way, the embodiment of the present invention monitors the voltage data and current data of the bidirectional DC power supply in the forward direction and the reverse direction, and obtains the stability of the bidirectional DC power supply when the bidirectional DC power supply performs current switching in a high temperature environment, the switching time when performing cycle switching, and the similarity between the current fluctuation and the voltage fluctuation when performing cycle switching. Finally, based on the stability, switching time and similarity, the number of monitoring cycles in which the bidirectional DC power supply is in a stable state when switching is determined, thereby obtaining the aging test result of the bidirectional DC power supply. Therefore, the embodiment of the present invention considers the influence of the high temperature environment on the switching efficiency when the bidirectional DC power supply is switched, reduces the difference between the aging test result of the bidirectional DC power supply and the actual situation, and improves the accuracy of the aging test result of the bidirectional DC power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A flow chart of a DC power supply aging test method provided by one embodiment of the present invention.

[0018] Figure 2 A schematic diagram of the structure of a DC power supply aging test device provided by an embodiment of the present invention.

[0019] Figure 3A schematic diagram of the structure of a DC power supply aging test system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of a DC power supply aging test method proposed by the present invention, its specific implementation method, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0021] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0022] It should be noted that in order to ensure that the calculation results are meaningful, when performing fractional operations in the embodiments of the present invention, when the denominator is 0, it is necessary to add a parameter adjustment factor greater than 0 to the denominator to prevent the denominator from being 0. The value of the parameter adjustment factor is set by the implementer according to actual conditions, and this application does not impose any special restrictions.

[0023] A specific scheme of a DC power supply aging test method provided by the present invention is described in detail below with reference to the accompanying drawings.

[0024] Embodiment 1: See also Figure 1 , which shows a flow chart of a DC power supply aging test method provided by an embodiment of the present invention, including: S101, obtaining monitoring data during an aging test of a bidirectional direct current power supply in a high temperature environment.

[0025] The monitoring data includes first current data and first voltage data of the bidirectional DC power supply in a first monitoring cycle in a positive direction, and second current data and second voltage data of the bidirectional DC power supply in a second monitoring cycle in a reverse direction.

[0026] Specifically, the bidirectional DC power supply in the embodiment of the present invention can select a bidirectional DC power supply with a color touch screen and physical buttons to improve the flexibility of operation and efficiency of use. Its product model can be determined according to the actual test requirements. In the embodiment of the present invention, a bidirectional DC power supply with a product model of BD651000-30 is selected for aging test. The test equipment involved in the aging test of the bidirectional DC power supply can be a current sensor, a voltage sensor, and an aging test chamber. The test environment is an aging test chamber and the two poles of the bidirectional DC power supply are connected to the load and the power supply. A high temperature environment is set in the aging test chamber. In the embodiment of the present invention, the temperature in the aging test chamber is set to .

[0027] Furthermore, when testing the bidirectional DC power supply, a current sensor and a voltage sensor are used to monitor the voltage and current data during the test of the bidirectional DC power supply. The monitoring data is recorded in time series. In the embodiment of the present invention, the voltage data detected at the i-th moment is recorded as , the current data is The initial test direction of the bidirectional DC power supply is set to the positive direction, which is recorded as , otherwise , then the forward voltage data is , the reverse voltage data is The current is switched once every 1 hour, completing a monitoring cycle. In the embodiment of the present invention, the detection time is specifically , a detection is performed every 2s, and the detection time between adjacent monitoring cycles is the number of moments when the current data is re-detected as the initial moment of the next monitoring cycle. In the embodiment of the present invention, the monitoring cycle of the bidirectional DC power supply in the positive direction is recorded as the first monitoring cycle, and the monitoring cycle of the bidirectional DC power supply in the reverse direction is recorded as the second monitoring cycle.

[0028] S102, determining a first stability parameter of a first monitoring period according to first current data and first voltage data at adjacent moments.

[0029] Specifically, the bidirectional DC power supply is a type of DC power supply. A DC power supply is a power supply device that provides a stable DC voltage. During testing, the state stability of the DC power supply is mainly tested. In the embodiment of the present invention, the stability of the bidirectional DC power supply is also tested.

[0030] Furthermore, when determining the first stability parameter of the first monitoring period, as an optional embodiment of the present invention, firstly, a first difference sequence of the first difference between the first current data at adjacent moments in the first monitoring period, a second difference sequence of the second difference between the first voltage data at adjacent moments, a first ratio between the first current data at adjacent moments, and a second ratio between the first voltage data at adjacent moments are calculated; then, the first fluctuation coefficient of the forward current in the positive test direction is determined according to the first difference sequence and the first ratio, and the second fluctuation coefficient of the forward voltage in the reverse test direction is determined according to the second difference sequence and the second ratio; secondly, the first stability parameter of the first monitoring period is determined using the first fluctuation coefficient, the second fluctuation coefficient, the maximum current value, and the maximum voltage value in the first monitoring period.

[0031] Specifically, in the embodiment of the present invention, a first difference sequence of first differences between first current data at adjacent moments in a first monitoring period at adjacent moments is obtained. In the embodiment of the present invention, the first difference sequence is recorded as for . Represents the first difference between the first current data at adjacent moments i and i+1 in the positive direction. Further, based on the ratio between the current data obtained at adjacent moments, the first fluctuation coefficient of the forward current in the positive test direction is determined. At the same time, in order to avoid the pseudo-steady state caused by the continuous increase in fluctuations at adjacent moments and similar amplitudes, the difference between the maximum amplitude and the minimum amplitude occurring during the monitoring process is combined as a reference factor for the first fluctuation coefficient. It is worth noting that in the above embodiment, the positive test direction refers to the forward direction of the bidirectional DC power supply, and the reverse test direction refers to the reverse direction of the bidirectional DC power supply.

[0032] Further, when determining the first fluctuation coefficient of the forward current, as an optional embodiment of the present invention, the first average value of the first ratio between the first current data at each adjacent moment is calculated; the maximum value of the first difference is determined from the first difference sequence; and the first product of the first average value and the maximum value of the first difference is determined as the first fluctuation coefficient.

[0033] Specifically, the first fluctuation coefficient is calculated using the following formula in the embodiment of the present invention: In the above formula, is the first fluctuation coefficient of the forward current in the positive test direction. i is the time number, n is the total number of time, and n is a natural number greater than or equal to 2. The first current data monitored at time i is the forward current in the positive test direction. The first current data monitored at time i+1 is the forward current in the positive test direction. is the ratio between the first current data at adjacent moments. It is the average value of the ratio of the first current data changes at adjacent moments in the first monitoring period, indicating the fluctuation state of the current. It is the maximum value of the first difference between the first current data at adjacent moments, which is used as a reference coefficient to reduce randomness. Indicates the first fluctuation coefficient of the forward current in the positive test direction. The larger the value, the more violent the current fluctuation state, and vice versa.

[0034] Further, when determining the second fluctuation coefficient of the forward voltage in the positive test direction, as an optional embodiment of the present invention, the second average value of the second ratio between the first voltage data at each adjacent moment is calculated; the maximum value of the second difference is determined from the second difference sequence; and the second product of the second average value and the maximum value of the second difference is determined as the second fluctuation coefficient.

[0035] Specifically, the embodiment of the present invention specifically uses the following formula to calculate the second fluctuation coefficient: In the above formula, is the second fluctuation coefficient of the forward voltage in the positive test direction. i is the time number, n is the total number of time, and n is a natural number greater than or equal to 2. The first voltage data monitored at time i of the forward voltage in the positive test direction. The first voltage data monitored at time i+1 is the forward voltage in the positive test direction. is the ratio between the first voltage data at adjacent moments. It is the average value of the ratio of the first voltage data changes at adjacent moments in the first monitoring period, indicating the voltage fluctuation state. The maximum value of the second difference between the first voltage data at adjacent moments is used as a reference coefficient to reduce randomness. Indicates the second fluctuation coefficient of the forward voltage in the positive test direction. The larger the value, the more violent the voltage fluctuation state, and vice versa.

[0036] Furthermore, in a high-temperature test environment, each internal component of the bidirectional DC power supply will experience a temperature rise phenomenon, resulting in an increase in the resistance of the electronic components, which in turn affects the stability of the voltage and current of the bidirectional DC power supply during operation. Therefore, the embodiment of the present invention obtains the stability parameter within the monitoring period by comparing the fluctuation coefficients of the current and voltage. As an optional embodiment of the present invention, firstly, the third ratio between the first fluctuation coefficient and the second fluctuation coefficient, and the absolute value of the third difference between the third ratio and the preset value are calculated; then, the fourth ratio between the maximum current value and the maximum voltage value is calculated, and the third product between the absolute value of the third difference and the fourth ratio is calculated; finally, the third product is normalized to obtain the first stability parameter.

[0037] Specifically, the preset value in the embodiment of the present invention can be 1, and the embodiment of the present invention specifically uses the following formula to calculate the first stability parameter: In the above formula, is the first stability parameter of the first monitoring period. It is the first fluctuation coefficient of the forward current in the positive test direction. It is the second fluctuation coefficient of the forward voltage in the positive test direction. It is the difference between the first fluctuation coefficient of the forward current, the second fluctuation coefficient of the forward voltage and 1, indicating the similarity of the fluctuations of the current and voltage. The closer the value is to 0, the higher the similarity, and vice versa. is the maximum current value in the first monitoring cycle. is the maximum voltage value in the first monitoring cycle. is the ratio of the maximum current value to the maximum voltage value, which is used as the influencing factor of similarity to reduce the difference. Represents the first stability parameter of the first monitoring period. The smaller the value, the smaller the fluctuation degree, and vice versa. Represents the derivative of the softsign function, using the derivative of the softsign function Normalize it so that When the value is 0, , the larger the value, The smaller it is, the higher the stability of the first monitoring cycle is.

[0038] Furthermore, in order to reduce the amount of subsequent calculations, the predetermined threshold is set to 0.6 in the embodiment of the present invention. When the monitoring cycle is relatively stable, the subsequent steps of the embodiment of the present invention are continued; otherwise, it is unstable, and the aging test result of the bidirectional DC power supply is directly obtained without performing the subsequent processing of the embodiment of the present invention.

[0039] S103, determining a switching duration when the bidirectional direct current power source performs period switching according to the end detection time of the first monitoring cycle and the start detection time of the second monitoring cycle.

[0040] Specifically, when the state of the bidirectional DC power supply is switched, the temperature rise of the electronic components in the high temperature test environment causes the resistance value to increase, thereby affecting the current steering efficiency during the switching process, and the current, voltage, etc. will fluctuate after the switching, aggravating the reduction of the current steering efficiency, thereby affecting the stability of the bidirectional DC power supply. The current switching efficiency of the bidirectional DC power supply and the output stability of related parameters such as the current after switching determine the overall performance state parameters of the detection device. Therefore, the embodiment of the present invention obtains the current switching efficiency by calculating the time variation coefficient of the current switching during the monitoring process and the time variation parameters of the current and other related parameters after the current switching is completed from the conversion fluctuation to the stable state. The higher the efficiency, the more stable the bidirectional DC power supply, and vice versa.

[0041] Furthermore, in the embodiment of the present invention, the switching duration of each current switching is obtained according to the time data detected when the current sensor performs the conversion. In the embodiment of the present invention, the formula is used Calculate, where For the The monitoring cycle switches to the The switching duration of a monitoring cycle, is the number of the monitoring period, For monitoring cycle The end detection time, For monitoring cycle The starting detection time.

[0042] Furthermore, the embodiment of the present invention can also obtain the change state parameter based on the ratio of the switching durations of adjacent monitoring cycles: In the above formula, is the state parameter of the changing duration, is the monitoring period number, , are the switching durations of adjacent monitoring cycles respectively. The larger the ratio of the switching durations of adjacent monitoring cycles is, the greater the difference value is. Otherwise, the difference value is smaller.

[0043] S104: Determine similarity between current fluctuation and voltage fluctuation of the bidirectional direct current power supply after periodic switching according to the second current data and the second voltage data at each adjacent moment.

[0044] Specifically, when the current switches, the direction of the current changes, which causes the current and voltage to have an instantaneous peak phenomenon, and then it takes a while to transition to a stable state. The shorter the transition time, the more stable the bidirectional DC power supply as a whole, and vice versa. Therefore, when analyzing the switching time, it is necessary to consider the transition time ratio of the current, voltage, etc. from the instantaneous peak to the stable state.

[0045] Further, when determining the similarity between the current fluctuation and the voltage fluctuation of the bidirectional direct current power supply after the periodic switching, as an optional embodiment of the present invention, firstly, a third difference sequence of the fourth difference between the second current data at each adjacent moment in the second monitoring period, a fourth difference sequence of the fifth difference between the second voltage data at each adjacent moment, a fifth ratio between the second current data at each adjacent moment, and a sixth ratio between the second voltage data at each adjacent moment are calculated; then, a third fluctuation coefficient of the bidirectional direct current power supply after the switching is determined according to the third difference sequence and the fifth ratio, and a fourth fluctuation coefficient of the bidirectional direct current power supply after the switching is determined according to the fourth difference sequence and the sixth ratio; secondly, a first recovery time of the bidirectional direct current power supply from the current fluctuation state to the stable state after the switching is determined according to the third fluctuation coefficient, and a second recovery time of the bidirectional direct current power supply from the voltage fluctuation state to the stable state after the switching is determined according to the fourth fluctuation coefficient; and a second stability parameter of the second monitoring period is determined according to the third fluctuation coefficient, the fourth fluctuation coefficient, the maximum current value and the maximum voltage value in the second monitoring period; finally, the similarity between the current fluctuation and the voltage fluctuation of the bidirectional direct current power supply after the switching is determined based on the first recovery time, the second recovery time and the second stability parameter.

[0046] Specifically, after the current direction is switched, from the forward Become negative , the embodiment of the present invention obtains a third difference sequence of the fourth difference between the second current data at each adjacent moment in the second monitoring period for the current data after the current switching. In the embodiment of the present invention, the third difference sequence Recorded as . Represents a fourth difference between the second current data between adjacent moments i and i+1 in the second monitoring period.

[0047] Furthermore, when determining the third fluctuation coefficient of the bidirectional DC power supply after switching, as an optional embodiment of the present invention, firstly select the maximum value of the fourth difference from the third difference sequence; calculate the reciprocal of the absolute value of the sixth difference between the fifth ratio and the preset value, and calculate the fourth product between the reciprocal of the absolute value of the sixth difference and the maximum value of the fourth difference; normalize the fourth product to obtain the third fluctuation coefficient.

[0048] Specifically, the embodiment of the present invention uses the following formula to calculate the third fluctuation coefficient: In the above formula, is the third fluctuation coefficient of the bidirectional DC power supply after switching. It is the second current data at the time i when the current detection is performed in the reverse direction. It is the second current data of the current detection time i+1 in the reverse direction. is the maximum value of the fourth difference value selected from the third difference value sequence. Represents the normalization function, which is used to Perform normalization.

[0049] Furthermore, when determining the fourth fluctuation coefficient of the bidirectional DC power supply after switching, as an optional embodiment of the present invention, first, the maximum value of the fifth difference is selected from the fourth difference sequence; then, the reciprocal of the absolute value of the seventh difference between the sixth ratio and the preset value is calculated, and the fifth product between the reciprocal of the absolute value of the seventh difference and the maximum value of the fifth difference is calculated; finally, the fifth product is normalized to obtain the fourth fluctuation coefficient.

[0050] Specifically, the embodiment of the present invention specifically uses the following formula to calculate the fourth fluctuation coefficient: In the above formula, is the fourth fluctuation coefficient of the bidirectional DC power supply after switching. It is the second voltage data at the time i when voltage detection is performed in the reverse direction. It is the second voltage data of the voltage detection time i+1 in the reverse direction. is the maximum value of the fifth difference value selected from the fourth difference value sequence. Represents the normalization function, which is used to Perform normalization.

[0051] Furthermore, when determining the first recovery time and the second recovery time, the embodiment of the present invention sets a time threshold. In the embodiment of the present invention, the time threshold is set to 0.2. When , the current fluctuation is large, otherwise the fluctuation is small. The moment of time is marked, then this moment is the moment when the current fluctuation ends, and the first recovery time is obtained First recovery time It can be the difference between the end time of current fluctuation and the initial time of current switching. When the voltage is high, the voltage fluctuation is large, otherwise the fluctuation is small. The moment of , is marked as the moment when the voltage fluctuation ends, and the second recovery time is obtained Second recovery time It can be the difference between the moment when the voltage fluctuation ends and the moment when the current switches.

[0052] Furthermore, the embodiment of the present invention uses the following formula to calculate the second stability parameter of the second monitoring period: In the above formula, The second stability parameter represents a second monitoring period. is the fourth fluctuation coefficient of the bidirectional DC power supply after switching. is the third fluctuation coefficient of the bidirectional DC power supply after switching. Indicates the maximum current value in the second monitoring cycle. Indicates the maximum voltage value in the second monitoring cycle. Represents the derivative of the softsign function, using the derivative of the softsign function Perform normalization.

[0053] Furthermore, the embodiment of the present invention obtains the similarity between the voltage fluctuation and the current fluctuation according to the change in time of the current after the current switching and the voltage completing the recovery cycle. As an optional embodiment of the present invention, the reciprocal of the absolute value of the eighth difference between the first recovery time and the second recovery time is first calculated; and then the sixth product between the reciprocal of the absolute value of the eighth difference and the second stability parameter is determined as the similarity.

[0054] Specifically, the embodiment of the present invention specifically uses the following formula to calculate the similarity: In the above formula, is the similarity between the current fluctuation and voltage fluctuation of the bidirectional DC power supply after switching in the jth monitoring cycle. The monitoring period number. The first recovery time. The second recovery time. is the ratio of the difference between the first recovery time of the current and the second recovery time of the voltage to 1. The larger the difference, the smaller the ratio and the lower the similarity. is the second stability parameter of the jth monitoring period.

[0055] S105, determining a first number of monitoring cycles in which the bidirectional direct current power supply is in a stable state when performing current switching according to the first stability parameter, the switching duration, and the similarity.

[0056] Specifically, the embodiment of the present invention determines whether the bidirectional DC power supply is in a stable state when performing current switching according to the first stability parameter, switching duration and similarity. As an optional embodiment of the present invention, firstly, the stable state recovery index of the bidirectional DC power supply when performing current switching after the first monitoring cycle is completed is determined according to the first stability parameter, switching duration and similarity; then, the variation coefficient between the stable state recovery indexes in adjacent monitoring cycles is determined according to the stable state recovery indexes of adjacent monitoring cycles; then, the influencing parameters of the bidirectional DC power supply affecting the stability of the bidirectional DC power supply when the current is switched are determined according to the variation coefficient and the switching duration of adjacent monitoring cycles; secondly, the influencing parameters are normalized using the reverse min-max function to obtain the normalized value; finally, the monitoring cycles whose normalized values ​​are greater than the threshold are marked to obtain the first number of monitoring cycles in which the bidirectional DC power supply is in a stable state when performing current switching.

[0057] Specifically, the embodiment of the present invention specifically uses the following formula to calculate the steady state recovery index when the current is switched after the first monitoring cycle is completed: In the above formula, It is the steady state recovery index of the bidirectional DC power supply when current switching is performed after the monitoring cycle j is completed. is the similarity between the current fluctuation and voltage fluctuation of the bidirectional DC power supply after switching in the jth monitoring cycle. is the switching duration when current switching is performed in the jth monitoring cycle. is the first stability parameter of monitoring period j. It is the difference between the similarity between the current fluctuation and voltage fluctuation after the monitoring cycle switching and the first stability parameter of the monitoring cycle j. It represents the changing state of the influence of the monitoring cycle switching on the current and voltage parameters. The larger the value, the worse the recovery state of the monitoring cycle, and vice versa. To affect the ratio of the change state to the current switching time and 1, the larger the value, the better the recovery effect, and vice versa. The sigmoid function is used to Perform normalization.

[0058] Furthermore, after the aging test, the bidirectional DC power supply can quickly pass the failure period, so that the product enters a relatively stable long-term accidental failure period. However, during the testing process of the bidirectional DC power supply, it is necessary to consider the impact of current switching on the stability of the detection parameters of the bidirectional DC power supply. In the embodiment of the present invention, the stable state recovery index between the two monitoring cycles before and after the current switching is obtained through the above embodiment. As the monitoring cycle increases, the impact of current switching on the bidirectional DC power supply gradually becomes stable, that is, the stable state recovery index within adjacent monitoring cycles is Gradually approaching, therefore, the embodiment of the present invention determines the coefficient of variation between the stable state recovery indices in adjacent monitoring periods according to the stable state recovery indices in adjacent monitoring periods. That is, the following formula is used to calculate the coefficient of variation between the stable state recovery indices in adjacent monitoring periods: : In the above formula, Represents the coefficient of variation between the steady-state recovery indices within adjacent monitoring periods. It is the steady state recovery index of the bidirectional DC power supply when current switching is performed after the monitoring cycle j is completed. It is the steady state recovery index of the bidirectional DC power supply when current switching is performed after the monitoring cycle j+1 is completed. Represents the maximum and minimum normalization function, which is used to Perform normalization.

[0059] Furthermore, the switching time of the current It is an important parameter that affects the current direction conversion of the bidirectional DC power supply. Therefore, when obtaining the overall influencing parameter of the current switching on the current change, the current switching time change difference parameter is used as the influencing factor. The embodiment of the present invention specifically uses the following formula to calculate the influencing parameter of the bidirectional DC power supply when the current is switched on the stability of the bidirectional DC power supply: In the above formula, It is an influencing parameter of the bidirectional DC power supply that affects the stability of the bidirectional DC power supply when the current is switched. For the monitoring cycle. is the coefficient of variation between the steady-state recovery indexes between adjacent monitoring periods j and j+1. is the switching duration of the jth monitoring cycle. is the switching duration of the j+1th monitoring cycle. It is the difference between the switching duration ratio in adjacent monitoring cycles and 1. The closer the value is to 0, the better the stable state is, and vice versa.

[0060] Furthermore, using the reverse min-max function Perform normalization to obtain normalized values , so that The smaller the value, the The threshold in the embodiment of the present invention can be determined according to actual conditions. In the embodiment of the present invention, the value is 0.6. When the state of the bidirectional DC power supply under the adjacent current switching operation is stable, the monitoring period in the stable state is marked, otherwise it is not marked, and the first number of monitoring periods in the stable state when the marked current is switched is counted. .

[0061] S106: Determine an aging test result of the bidirectional direct current power supply according to a second number and a first number of total monitoring cycles of the bidirectional direct current power supply.

[0062] Specifically, when the bidirectional DC power supply is in a stable state for a long time during operation, the bidirectional DC power supply passes the early failure period and enters a relatively stable long-term accidental failure period. Therefore, the proportion of the overall detection is analyzed by analyzing the duration of the continuous stable stage during the aging test of the bidirectional DC power supply to obtain its proportion , determine whether the bidirectional DC power supply has completed the aging test.

[0063] Further, as an optional embodiment of the present invention, the stable proportional coefficient of the bidirectional DC power supply is first determined based on the second number and the first number of the total monitoring cycles of the bidirectional DC power supply; and then the aging test result of the bidirectional DC power supply is determined based on the stable proportional coefficient.

[0064] Specifically, the embodiment of the present invention specifically uses the following formula to calculate the stable proportional coefficient: In the above formula, is the stable proportional coefficient of the bidirectional DC power supply. The first number of monitoring cycles in which the bidirectional direct current power supply is in a stable state when performing current switching. is a second number of total monitoring cycles of the bidirectional DC power supply. It is the ratio between the first number of monitoring cycles of the stable state of the bidirectional DC power supply and the second number of total monitoring cycles. The larger the value is, the longer the stable state of the bidirectional DC power supply lasts, and vice versa.

[0065] Furthermore, the embodiment of the present invention sets a test threshold, which can be determined according to actual conditions. In the embodiment of the present invention, the value is 0.5. When , the aging test result of the bidirectional DC power supply is determined to have entered a relatively stable long-term accidental failure period, and the aging test is completed. Then continue testing.

[0066] It is worth noting that during the aging test, when the monitoring data of the bidirectional DC power supply exceeds the safety threshold set by the test staff, the test status is abnormal, the test product fails, the aging test is stopped, and the test product is replaced and retested.

[0067] The embodiment of the present invention monitors the voltage data and current data of the bidirectional DC power supply in the forward direction and the reverse direction, and obtains the stability of the bidirectional DC power supply when the bidirectional DC power supply performs current switching in a high temperature environment, the switching time when performing cycle switching, and the similarity between the current fluctuation and the voltage fluctuation when performing cycle switching. Finally, based on the stability, switching time and similarity, the number of monitoring cycles in which the bidirectional DC power supply is in a stable state when switching is determined, thereby obtaining the aging test result of the bidirectional DC power supply. Therefore, the embodiment of the present invention considers the influence of the high temperature environment on the switching efficiency when the bidirectional DC power supply is switched, reduces the difference between the aging test result of the bidirectional DC power supply and the actual situation, and improves the accuracy of the aging test result of the bidirectional DC power supply.

[0068] Embodiment 2: Based on the DC power supply aging test method provided in the above embodiment and based on the same technical concept, an embodiment of the present invention further provides a DC power supply aging test device. Figure 2 A schematic diagram of a DC power supply aging test device provided by an embodiment of the present invention is shown in FIG. Figure 2As shown. The DC power supply aging test device 200 includes: an acquisition module 201, which is used to acquire monitoring data of the bidirectional DC power supply during the aging test process in a high temperature environment, wherein the monitoring data includes first current data and first voltage data of the bidirectional DC power supply in the first monitoring cycle in the positive direction, and second current data and second voltage data of the bidirectional DC power supply in the second monitoring cycle in the reverse direction; a determination module 202, which is used to determine the first stability parameter of the first monitoring cycle according to the first current data and the first voltage data at each adjacent moment; the determination module 202, which is also used to determine the switching duration when the bidirectional DC power supply performs cycle switching according to the termination detection moment of the first monitoring cycle and the start detection moment of the second monitoring cycle; the determination module 202, which is also used to determine the similarity between the current fluctuation and the voltage fluctuation of the bidirectional DC power supply after the cycle switching according to the second current data and the second voltage data at each adjacent moment; the determination module 202, which is also used to determine the first number of monitoring cycles in which the bidirectional DC power supply is in a stable state when performing current switching according to the first stability parameter, the switching duration and the similarity; the determination module 202, which is also used to determine the aging test result of the bidirectional DC power supply according to the second number and the first number of the total monitoring cycles of the bidirectional DC power supply.

[0069] The embodiment of the present invention monitors the voltage data and current data of the bidirectional DC power supply in the forward direction and the reverse direction, and obtains the stability of the bidirectional DC power supply when the bidirectional DC power supply performs current switching in a high temperature environment, the switching time when performing cycle switching, and the similarity between the current fluctuation and the voltage fluctuation when performing cycle switching. Finally, based on the stability, switching time and similarity, the number of monitoring cycles in which the bidirectional DC power supply is in a stable state when switching is determined, thereby obtaining the aging test result of the bidirectional DC power supply. Therefore, the embodiment of the present invention considers the influence of the high temperature environment on the switching efficiency when the bidirectional DC power supply is switched, reduces the difference between the aging test result of the bidirectional DC power supply and the actual situation, and improves the accuracy of the aging test result of the bidirectional DC power supply.

[0070] Embodiment three: Corresponding to the DC power supply aging test method provided in the above embodiment, based on the same technical concept, an embodiment of the present invention further provides a DC power supply aging test system, which is used to execute the above DC power supply aging test method. Figure 3 A schematic diagram of a DC power supply aging test system provided by another embodiment of the present invention is shown in FIG. Figure 3The DC power aging test system may have relatively large differences due to different configurations or performances, and may include one or more processors 301 and memory 302, the memory 302 is used to store computer programs that can be run on the processor 301, and the processor 301 is used to execute the program stored in the memory 302 to achieve the above Figure 1 The various steps in the method embodiment. Among them, the memory 302 can be a temporary storage or a permanent storage. The application stored in the memory 302 may include one or more modules (not shown in the figure), and each module may include a series of computer executable instructions in the DC power aging test system.

[0071] Furthermore, the processor 301 can be configured to communicate with the memory 302 to execute a series of computer executable instructions in the memory 302 on the DC power aging test system. The DC power aging test system can also include one or more power supplies 303, one or more wired or wireless network interfaces 304, one or more input and output interfaces 305, and one or more keyboards 306.

[0072] Specifically in this embodiment, the DC power aging test system includes a processor, a communication interface, a memory and a communication bus; wherein the processor, the communication interface and the memory communicate with each other through the bus; the memory is used to store computer programs; the processor is used to execute the programs stored in the memory to achieve the above Figure 1 The various steps in the method embodiment are similar to those in the method embodiment, and have the beneficial effects of the above method embodiments. To avoid repetition, the embodiments of the present invention will not be described in detail here.

[0073] It should be noted that the DC power supply aging test system provided in the embodiment of the present invention and the DC power supply aging test method provided in the embodiment of the present invention are based on the same application concept, so the specific implementation of this embodiment can refer to the implementation of the aforementioned DC power supply aging test method, and has the same or similar beneficial effects, and the repeated parts will not be repeated.

[0074] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0075] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A DC power supply aging test method, characterized in that: The DC power supply aging test method comprises: Acquire monitoring data during an aging test of a bidirectional DC power supply in a high temperature environment, the monitoring data comprising first current data and first voltage data of the bidirectional DC power supply in a first monitoring cycle in a forward direction, and second current data and second voltage data of the bidirectional DC power supply in a second monitoring cycle in a reverse direction; Determine a first stability parameter of the first monitoring period according to first current data and first voltage data at each adjacent moment; Determining a switching duration when the bidirectional direct current power supply performs period switching according to the termination detection time of the first monitoring cycle and the start detection time of the second monitoring cycle; Determine the similarity between the current fluctuation and the voltage fluctuation of the bidirectional direct current power supply after periodic switching according to the second current data and the second voltage data at each adjacent moment; Determining a first number of monitoring cycles in which the bidirectional direct current power supply is in a stable state when performing current switching according to the first stability parameter, the switching duration, and the similarity; An aging test result of the bidirectional direct current power supply is determined according to a second number of total monitoring cycles of the bidirectional direct current power supply and the first number.

2. The DC power supply aging test method according to claim 1, characterized in that: The determining of the first stability parameter of the first monitoring period according to the first current data and the first voltage data at each adjacent moment comprises: Calculate a first difference sequence of first differences between first current data at adjacent moments in the first monitoring period, a second difference sequence of second differences between first voltage data at adjacent moments, a first ratio between first current data at adjacent moments, and a second ratio between first voltage data at adjacent moments; Determine a first fluctuation coefficient of a forward current in a positive test direction according to the first difference sequence and the first ratio, and determine a second fluctuation coefficient of a forward voltage in the positive test direction according to the second difference sequence and the second ratio; A first stability parameter of the first monitoring period is determined by using the first fluctuation coefficient, the second fluctuation coefficient, a maximum current value, and a maximum voltage value in the first monitoring period.

3. The DC power supply aging test method according to claim 2, characterized in that: The step of determining the first fluctuation coefficient of the forward current in the positive test direction according to the first difference sequence and the first ratio comprises: Calculate a first average value of first ratios between first current data at adjacent moments; Determine a maximum value of first difference values ​​from the first difference value sequence; Determine a first product of the first average value and the maximum value of the first difference as the first fluctuation coefficient; Determining the second fluctuation coefficient of the forward voltage in the positive test direction according to the second difference sequence and the second ratio comprises: Calculate a second average value of second ratios between first voltage data at adjacent moments; Determining a maximum value of second difference values ​​from the second difference value sequence; A second product of the second average value and the maximum value of the second difference is determined as the second fluctuation coefficient.

4. The DC power supply aging test method according to claim 2, characterized in that: The determining of the first stability parameter of the first monitoring period by using the first fluctuation coefficient, the second fluctuation coefficient, the maximum current value and the maximum voltage value in the first monitoring period comprises: Calculating a third ratio between the first fluctuation coefficient and the second fluctuation coefficient, and an absolute value of a third difference between the third ratio and a preset value; calculating a fourth ratio between the maximum current value and the maximum voltage value, and calculating a third product between the absolute value of the third difference and the fourth ratio; The third product is normalized to obtain the first stability parameter.

5. The DC power supply aging test method according to any one of claims 1 to 4, characterized in that: Determining the similarity between the current fluctuation and the voltage fluctuation of the bidirectional DC power supply after periodic switching according to the second current data and the second voltage data at each adjacent moment includes: Calculate a third difference sequence of fourth differences between second current data at adjacent moments in the second monitoring period, a fourth difference sequence of fifth differences between second voltage data at adjacent moments, a fifth ratio between second current data at adjacent moments, and a sixth ratio between second voltage data at adjacent moments; determining a third fluctuation coefficient of the bidirectional direct current power supply after switching according to the third difference sequence and the fifth ratio, and determining a fourth fluctuation coefficient of the bidirectional direct current power supply after switching according to the fourth difference sequence and the sixth ratio; Determine a first recovery time of the bidirectional DC power supply from a current fluctuation state to a stable state after switching according to the third fluctuation coefficient, and determine a second recovery time of the bidirectional DC power supply from a voltage fluctuation state to a stable state after switching according to the fourth fluctuation coefficient; Determine a second stability parameter of the second monitoring period according to the third fluctuation coefficient, the fourth fluctuation coefficient, the maximum current value and the maximum voltage value in the second monitoring period; The similarity between the current fluctuation and the voltage fluctuation of the bidirectional direct current power supply after switching is determined based on the first recovery time, the second recovery time, and the second stability parameter.

6. The DC power supply aging test method according to claim 5, characterized in that: Determining the third fluctuation coefficient of the bidirectional direct current power supply after switching according to the third difference sequence and the fifth ratio includes: Selecting the maximum value of the fourth difference from the third difference sequence; calculating the reciprocal of the absolute value of a sixth difference between the fifth ratio and the preset value, and calculating a fourth product between the reciprocal of the absolute value of the sixth difference and the maximum value of the fourth difference; Normalizing the fourth product to obtain the third fluctuation coefficient; Determining a fourth fluctuation coefficient of the bidirectional direct current power supply after switching according to the fourth difference sequence and the sixth ratio includes: Selecting the maximum value of the fifth difference from the fourth difference sequence; calculating the reciprocal of the absolute value of a seventh difference between the sixth ratio and a preset value, and calculating a fifth product between the reciprocal of the absolute value of the seventh difference and the maximum value of the fifth difference; The fifth product is normalized to obtain the fourth fluctuation coefficient.

7. The DC power supply aging test method according to claim 5, characterized in that: The determining, based on the first recovery time, the second recovery time, and the second stability parameter, the similarity between the current fluctuation and the voltage fluctuation of the bidirectional DC power supply after switching comprises: Calculate the reciprocal of the absolute value of an eighth difference between the first recovery time length and the second recovery time length; A sixth product between the inverse of the absolute value of the eighth difference and the second stability parameter is determined as the similarity.

8. The DC power supply aging test method according to claim 1, characterized in that: Determining the first number of monitoring cycles in which the bidirectional DC power supply is in a stable state when performing current switching according to the first stability parameter, the switching duration, and the similarity includes: Determine, according to the first stability parameter, the switching duration and the similarity, a stable state recovery index of the bidirectional direct current power supply when current switching is performed after the first monitoring cycle is completed; Determining, according to the stable state recovery indexes of adjacent monitoring periods, a coefficient of variation between the stable state recovery indexes within the adjacent monitoring periods; Determining, according to the variation coefficient and the switching duration of the adjacent monitoring cycles, an influencing parameter of the bidirectional direct current power supply that affects the stability of the bidirectional direct current power supply when the current is switched; Using an inverse min-max function to normalize the influencing parameter to obtain a normalized value; The monitoring periods in which the normalized value is greater than a threshold value are marked to obtain a first number of monitoring periods in which the bidirectional direct current power supply is in a stable state when performing current switching.

9. A DC power supply aging test device, characterized in that: include: An acquisition module, used to acquire monitoring data of a bidirectional DC power supply during an aging test in a high temperature environment, wherein the monitoring data includes first current data and first voltage data of the bidirectional DC power supply in a first monitoring cycle in a positive direction, and second current data and second voltage data of the bidirectional DC power supply in a second monitoring cycle in a reverse direction; A determination module, configured to determine a first stability parameter of the first monitoring period according to first current data and first voltage data at adjacent moments; The determination module is further used to determine the switching duration of the bidirectional DC power supply when performing period switching according to the termination detection time of the first monitoring cycle and the start detection time of the second monitoring cycle; The determination module is further used to determine the similarity between the current fluctuation and the voltage fluctuation of the bidirectional direct current power supply after periodic switching according to the second current data and the second voltage data at each adjacent moment; The determination module is further used to determine a first number of monitoring cycles in which the bidirectional direct current power supply is in a stable state when performing current switching according to the first stability parameter, the switching duration and the similarity; The determination module is further configured to determine an aging test result of the bidirectional DC power supply according to a second number of total monitoring cycles of the bidirectional DC power supply and the first number.

10. A DC power supply aging test system, characterized in that: include: A processor and a memory; wherein the memory is used to store a computer program that can be run on the processor; A processor is used to execute the program stored in the memory to implement the steps of the DC power supply aging test method as described in any one of claims 1 to 8.

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