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CN-122017377-A - Burn-in test device and burn-in test method thereof

CN122017377ACN 122017377 ACN122017377 ACN 122017377ACN-122017377-A

Abstract

The embodiment of the application relates to the technical field of equipment testing, and discloses an aging testing device and an aging testing method thereof. The aging test device is used for testing two inverters of the same model and comprises a first connecting circuit, a battery analog circuit for providing a first output voltage and a switching circuit. The switching circuit and the first connection circuit form a first closed loop test circuit or a second closed loop test circuit with the output of one inverter as the input of the other inverter. The testing device can enable energy to be recycled in a closed loop system, and electric energy consumption and heating value are remarkably reduced. Moreover, the two inverters to be tested can be matched with each other in voltage and frequency, so that the strict requirement on the voltage output range of the battery analog circuit is reduced.

Inventors

  • WANG FENG

Assignees

  • 广州视源电子科技股份有限公司
  • 广州视源睿创电子科技有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (10)

  1. 1. The aging test device is applied to two inverters to be tested, and is characterized in that the two inverters to be tested are a first inverter to be tested and a second inverter to be tested, and the types of the first inverter to be tested and the second inverter to be tested are the same; The burn-in test apparatus includes: the first connecting circuit is respectively electrically connected with battery connecting ends of the first inverter to be tested and the second inverter to be tested; The switching circuit is provided with a first connecting end, a second connecting end, a third connecting end and a fourth connecting end, wherein the first connecting end is electrically connected with the power grid connecting end of the first inverter to be tested, the second connecting end is electrically connected with the power grid connecting end of the second inverter to be tested, the third connecting end is electrically connected with the inversion output end of the first inverter to be tested, and the fourth connecting end is connected with the inversion output end of the second inverter to be tested; the battery simulation circuit establishes electrical connection with a battery connection end of the first inverter to be tested or the second inverter to be tested through the first connection circuit and is used for providing a first output voltage; When the second connecting end of the switching circuit is disconnected from the third connecting end, the first inverter to be tested and the second inverter to be tested form a first closed loop test circuit; and when the first connecting end and the fourth connecting end of the switching circuit are disconnected, and the second connecting end and the third connecting end of the switching circuit are electrically connected, the first inverter to be tested and the second inverter to be tested form a second closed loop test circuit.
  2. 2. The burn-in apparatus of claim 1 wherein the first connection circuit comprises a first electrical switch and a second electrical switch; The battery connecting end of the first inverter to be tested is electrically connected with the battery connecting end of the second inverter to be tested through the first electrical switch; the battery simulation circuit is electrically connected with the battery connection end of the first inverter to be tested through the second electrical switch.
  3. 3. The burn-in apparatus of claim 1 wherein said switching circuit comprises a third electrical switch and a fourth electrical switch independent of each other; Wherein, two ends of the third electric switch respectively form the first connecting end and the fourth connecting end; the two ends of the fourth electric switch respectively form the second connecting end and the third connecting end; The first inverter to be tested and the second inverter to be tested form a first closed loop test circuit in response to the situation that the third electrical switch is closed and the fourth electrical switch is open, and form a second closed loop test circuit in response to the situation that the third electrical switch is open and the fourth electrical switch is closed.
  4. 4. The burn-in apparatus of claim 1, further comprising: the second connecting circuit is respectively electrically connected with the photovoltaic connecting ends of the first inverter to be tested and the second inverter to be tested; The photovoltaic analog circuit is connected with the photovoltaic connecting end of the first inverter to be tested and/or the second inverter to be tested through the second connecting circuit and is used for providing a preset second output voltage, and the second output voltage is adjustable within a preset second voltage range; And the load circuit is electrically connected with the first inverter to be tested and the second inverter to be tested and is used for providing at least one alternating current load state.
  5. 5. The burn-in apparatus of claim 4 wherein the photovoltaic analog circuit comprises a first photovoltaic analog circuit and a second photovoltaic analog circuit, wherein the third connection circuit comprises a fifth electrical switch and a sixth electrical switch, wherein the load circuit comprises a first load circuit and a second load circuit; The photovoltaic connection end of the first inverter to be tested is electrically connected with the first photovoltaic analog circuit through the fifth electrical switch, the photovoltaic connection end of the second inverter to be tested is electrically connected with the second photovoltaic analog circuit through the sixth electrical switch, the first load circuit is electrically connected with the first inverter to be tested, and the second load circuit is electrically connected with the second inverter to be tested.
  6. 6. The burn-in apparatus of claim 4 further comprising a seventh electrical switch; The photovoltaic analog circuit is electrically connected with the battery connecting end of the first inverter to be tested or the second inverter to be tested through the seventh electrical switch.
  7. 7. The burn-in apparatus of claim 4 wherein said AC load conditions comprise a grid-tie load condition and an off-grid load condition, said load circuit comprising: a grid connection unit configured to form an electric power transmission path between a grid connection end of the first or second inverter to be tested and a grid so that the grid-connected load state is applied to the grid connection end; And the energy feedback unit is arranged between the inversion output end of the first inverter to be tested or the second inverter to be tested and the power grid and is configured to apply an off-grid load state to the inversion output end.
  8. 8. The burn-in apparatus of claim 7 wherein said grid connection unit further comprises an air switch; Wherein the air switch is disposed on the power transmission path and is configured to automatically shut off the power transmission path in response to a failure condition.
  9. 9. A burn-in test method applied to the burn-in test apparatus according to any one of claims 1 to 8, comprising: Controlling a first connecting circuit and a switching circuit to enable a first inverter to be tested and a second inverter to be tested to form a first closed loop test circuit; controlling a battery simulation circuit to provide a first output voltage for the first closed-loop test circuit, and performing a first aging test; After the first aging test is performed for a preset time, a charging function aging test result of the first inverter to be tested and a discharging function aging test result of the second inverter to be tested are obtained; controlling the switching circuit to enable the first inverter to be tested and the second inverter to be tested to form a second closed loop test circuit; controlling the battery simulation circuit to provide a first output voltage for the second closed-loop test circuit, and performing a second aging test; And after the second aging test is performed for the preset time, a discharging function aging test result of the first inverter to be tested and a charging function aging test result of the second inverter to be tested are obtained.
  10. 10. The burn-in method of claim 9, further comprising: The method comprises the steps that a photovoltaic simulation circuit is controlled to provide a second output voltage for photovoltaic connecting ends of a first inverter to be tested and a second inverter to be tested through a second connecting circuit, and meanwhile, a load circuit is controlled to provide a preset alternating current load state for the first inverter to be tested and the second inverter to be tested, so that a third aging test is conducted; and after the third aging test is performed for the preset time, obtaining photovoltaic input function aging test results of the first inverter to be tested and the second inverter to be tested.

Description

Burn-in test device and burn-in test method thereof Technical Field The application relates to the technical field of equipment testing, in particular to an aging testing device and an aging testing method thereof. Background An inverter is a device capable of performing Alternating Current (AC) and Direct Current (DC) conversion. It is widely applied to various technical fields such as renewable energy sources and uninterruptible power supplies. In order to ensure the reliability and performance stability of the inverter product, the inverter product needs to be subjected to corresponding aging tests by simulating the long-term use mode of the inverter by one or more simulation devices before leaving the factory, so as to ensure the reliability of the inverter product in long-term use and identify potential faults and design defects. However, the existing inverter burn-in test method has a plurality of adverse effects, such as large consumption of electric energy, excessive heating value, high overall cost of simulation equipment and the like. Thus, there is an urgent need to provide a burn-in test method capable of effectively eliminating these adverse effects. Disclosure of Invention The embodiment of the application provides an aging test device and an aging test method thereof, aiming at solving at least one part of defects in the traditional inverter aging test scheme. In a first aspect, the present application provides a burn-in test apparatus. The aging test device is applied to two inverters with the same model, and comprises a first connecting circuit, a switching circuit, a battery analog circuit, a closed loop circuit and a closed loop circuit, wherein the first connecting circuit is electrically connected with battery connecting ends of a first inverter to be tested and a second inverter to be tested respectively, the switching circuit is provided with a first connecting end, a second connecting end, a third connecting end and a fourth connecting end, the first connecting end is electrically connected with a power grid connecting end of the first inverter to be tested, the second connecting end is electrically connected with an inversion output end of the second inverter to be tested, the third connecting end is electrically connected with an inversion output end of the first inverter to be tested, the battery analog circuit is electrically connected with a battery connecting end of the first inverter to be tested or the second inverter to be tested through the first connecting circuit, the first connecting end is used for providing a first output voltage, the second connecting end is electrically connected with a power grid connecting end of the first inverter to be tested, the second connecting end is electrically connected with the second connecting end of the second inverter to be tested, the second connecting end is electrically connected with the second inverter to be tested when the first connecting end of the switching circuit is disconnected with the second inverter to be tested, and the second connecting end of the second inverter to be tested is disconnected with the first inverter to be tested, and the second circuit to be tested is electrically connected with the second inverter to be tested, and the second circuit to be tested is electrically connected with the first inverter to be tested, and the second circuit to be tested is electrically connected with the second inverter to be tested. At least one advantageous aspect of the burn-in test apparatus of the embodiments of the present application is that a back-to-back connection between a first inverter to be tested and a second inverter to be tested is established using a switching circuit and a first connection circuit, and an output of one inverter is used as an input of the other inverter to form a first closed loop test circuit or a second closed loop test circuit. Therefore, the energy can be recycled in the closed loop test circuit, so that the electric energy consumed in the aging test is obviously reduced, and the heating value is further reduced. In addition, the two inverters to be tested with the same model can be matched with each other in voltage and frequency, and can have higher compatibility and work in a closed loop system in a cooperative manner more stably, so that the strict requirement on the voltage output range of the battery analog circuit is reduced, and the implementation cost of the aging test device is further reduced. In some embodiments, the first connection circuit comprises a first electrical switch and a second electrical switch, wherein the battery connection end of the first inverter to be tested is electrically connected with the battery connection end of the second inverter to be tested through the first electrical switch, and the battery simulation circuit is electrically connected with the battery connection end of the first inverter to be tested through the second electrical switch. At leas