Aging test circuit and control method thereof

Abstract

The invention relates to the technical field of equipment testing, and provides an aging test circuit and a control method thereof. The circuit comprises a direct-current power supply, a first domain control unit, a second domain control unit and a controller, the output side of the DC power supply is connected with the first side of the first domain control unit and the first side of the second domain control unit, and the second side of the first domain control unit is connected with the second side of the second domain control unit; the controller is used for controlling the first domain control unit to be in an inversion state and controlling the second domain control unit to be in a rectification state; or, the first domain control unit is controlled to be in the rectification state, and the second domain control unit is controlled to be in the inversion state. The aging test circuit provided by the embodiment of the invention can improve the aging test efficiency of the domain control unit.

Description

Technical Field

[0001] The present application relates to the technical field of equipment testing, and particularly relates to an aging test circuit and a control method thereof. Background Art

[0002] In the trend of integration, power equipment usually integrates a domain control unit including a motor controller and / or a bi-directional charger. The motor controller and bi-directional charger in the domain control unit are important electronic components affecting the performance of the power equipment. Therefore, it is usually necessary to perform an aging test on the domain control unit to determine the aging electronic components in the domain control unit for replacement or repair to maintain the performance of the power equipment.

[0003] In the related art, for the aging test of the domain control unit, corresponding aging test circuits are respectively built for individual electronic components in the domain control unit for aging test. When batch testing of multiple domain control units is required, this method requires building a large number of aging test circuits, and at least one test needs to be performed on each aging test circuit, which affects the test efficiency of the aging test. Summary of the Invention

[0004] The present application aims to at least solve one of the technical problems existing in the related art. For this purpose, the present application provides an aging test circuit to improve the aging test efficiency of the domain control unit.

[0005] The aging test circuit according to the first aspect embodiment of the present application includes:

[0006] A DC power supply, a first domain control unit, a second domain control unit, and a controller;

[0007] The output side of the DC power supply is connected to the first side of the first domain control unit and the first side of the second domain control unit, and the second side of the first domain control unit is connected to the second side of the second domain control unit;

[0008] The controller is configured to control the first domain control unit to be in an inverter state and control the second domain control unit to be in a rectifier state; or control the first domain control unit to be in a rectifier state and control the second domain control unit to be in an inverter state.

[0009] By providing an aging test circuit, including a DC power supply, a first domain control unit, a second domain control unit and a controller; the output side of the DC power supply is connected to the first side of the first domain control unit and the first side of the second domain control unit, and the second side of the first domain control unit is connected to the second side of the second domain control unit; the controller is used to control the first domain control unit to be in an inverter state and control the second domain control unit to be in a rectifier state; or, control the first domain control unit to be in a rectifier state and control the second domain control unit to be in an inverter state. Thus, it is possible to simultaneously perform aging tests on two domain control units through a single aging test circuit during one aging test process, effectively reducing the number of aging test circuits to be built and the number of tests required when batch testing domain control units, and improving the aging test efficiency of the domain control units.

[0010] According to an embodiment of the present application, it further includes: a first diode, a second diode, a first switch unit and a second switch unit;

[0011] The first diode is arranged between the output side of the DC power supply and the first side of the first domain control unit, and is in a reverse cut-off state when the voltage of the DC power supply is higher than the voltage of the first domain control unit, and the first switch unit is connected in parallel across both ends of the first diode;

[0012] The second diode is arranged between the output side of the DC power supply and the first sides of the first domain control unit and the second domain control unit, and is in a reverse cut-off state when the voltage of the DC power supply is higher than the voltage of the second domain control unit, and the second switch unit is connected in parallel across both ends of the second diode.

[0013] According to an embodiment of the present application, it further includes a third diode, and the third diode is arranged between the output side of the DC power supply and the first sides of the first domain control unit and the second domain control unit, and is in a conducting state when the voltage of the DC power supply is higher than the voltage of the first domain control unit or the voltage of the second domain control unit.

[0014] According to an embodiment of the present application, the controller is further used for:

[0015] When the first domain control unit is in an inverter state and the second domain control unit is in a rectifier state, control the first switch unit to close and the second switch unit to open;

[0016] Or,

[0017] When the first domain control unit is in a rectifier state and the second domain control unit is in an inverter state, control the first switch unit to open and the second switch unit to close.

[0018] According to an embodiment of the present application, the first domain control unit includes a first motor controller and a first bi-directional charger, and the second domain control unit includes a second motor controller and a second bi-directional charger;

[0019] The first side of the first motor controller, the first bi-directional charger, the second motor controller, and the second bi-directional charger is connected to the output side of the DC power supply;

[0020] The second side of the first motor controller is connected to the second side of the second motor controller through an isolation transformer, and the second side of the first bi-directional charger is connected to the second side of the second bi-directional charger;

[0021] The controller is specifically configured to:

[0022] Control the first motor controller and the first bi-directional charger to be in the inverter state, and control the second motor controller and the second bi-directional charger to be in the rectifier state; or, control the first motor controller and the first bi-directional charger to be in the rectifier state, and control the second motor controller and the second bi-directional charger to be in the inverter state.

[0023] According to an embodiment of the present application, the controller is further configured to:

[0024] When the second motor controller and the second bi-directional charger are in the rectifier state, according to the output voltage of the second bi-directional charger, control the output voltage of the second motor controller to be adjusted to be less than the output voltage of the second bi-directional charger, and control the output voltage of the DC power supply to be adjusted to be less than the output voltage of the second motor controller; or,

[0025] When the first motor controller and the first bi-directional charger are in the rectifier state, according to the output voltage of the first bi-directional charger, control the output voltage of the first motor controller to be adjusted to be less than the output voltage of the first bi-directional charger, and control the output voltage of the DC power supply to be adjusted to be less than the output voltage of the first motor controller.

[0026] According to an embodiment of the present application, the first domain control unit further includes a first DC / DC converter, and the second domain control unit further includes a second DC / DC converter;

[0027] The first sides of the first DC / DC converter and the second DC / DC converter are connected to the output side of the DC power supply, and the second sides of the first DC / DC converter and the second DC / DC converter are used to connect to a power supply device.

[0028] The control method of the aging test circuit according to the second aspect embodiment of the present application is applied to the aging test circuit described in any of the above embodiments, and includes:

[0029] Controlling the first domain control unit to be in an inverter state and controlling the second domain control unit to be in a rectifier state; or, controlling the first domain control unit to be in a rectifier state and controlling the second domain control unit to be in an inverter state.

[0030] The control device of the aging test circuit according to the second aspect embodiment of the present application is applied to the aging test circuit described in any of the above embodiments, and includes:

[0031] A control module, configured to control the first domain control unit to be in an inverter state and control the second domain control unit to be in a rectifier state; or, control the first domain control unit to be in a rectifier state and control the second domain control unit to be in an inverter state.

[0032] The electronic device according to the third aspect embodiment of the present application includes a processor and a memory storing a computer program, and when the processor executes the computer program, the control method of the aging test circuit described in any of the above embodiments is implemented.

[0033] The computer-readable storage medium according to the fourth aspect embodiment of the present application stores a computer program, and when the computer program is executed by a processor, the control method of the aging test circuit described in any of the above embodiments is implemented. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0035] Figure 1 It is the first structural schematic diagram of the aging test circuit provided by the embodiment of the present application;

[0036] Figure 2 It is the second structural schematic diagram of the aging test circuit provided by the embodiment of the present application;

[0037] Figure 3 It is the third structural schematic diagram of the aging test circuit provided by the embodiment of the present application;

[0038] Figure 4 It is the fourth structural schematic diagram of the aging test circuit provided by the embodiment of the present application;

[0039] Figure 5It is the fifth structural schematic diagram of the aging test circuit provided by the embodiment of the present application;

[0040] Figure 6 It is the sixth structural schematic diagram of the aging test circuit provided by the embodiment of the present application;

[0041] Figure 7 It is the seventh structural schematic diagram of the aging test circuit provided by the embodiment of the present application;

[0042] Figure 8 It is the flowchart of the control method of the aging test circuit provided by the embodiment of the present application;

[0043] Figure 9 It is the structural schematic diagram of the control device of the aging test circuit provided by the embodiment of the present application;

[0044] Figure 10 It is the structural schematic diagram of the electronic device provided by the embodiment of the present application;

[0045] Some of the reference numerals in the specific embodiments are as follows:

[0046] 1 - DC power supply; 2 - low - voltage power supply; 3 - grid - connected power supply; 10 - first domain control unit; 20 - second domain control unit; T - isolation transformer; D1 - first diode; D2 - second diode; D3 - third diode; K1 - first switch unit; K2 - second switch unit; 101 - first motor controller; 102 - first bi - directional charger; 103 - first DC / DC converter; 201 - second motor controller; 202 - second bi - directional charger; 203 - second DC / DC converter. Specific embodiments

[0047] To make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0048] Next, several specific embodiments will be used to introduce and illustrate the aging test circuit and its control method provided by the embodiments of the present application in detail.

[0049] In the trend of integration, power equipment usually integrates a domain control unit including a motor controller and / or a bi-directional charger. The motor controller and the bi-directional charger in the domain control unit are important electronic components that affect the performance of the power equipment. Therefore, it is usually necessary to conduct an aging test on the domain control unit to determine the aging electronic components in the domain control unit for replacement or repair to maintain the performance of the power equipment.

[0050] In the related art, for the aging test of the domain control unit, an aging test circuit is respectively built for each single electronic component in the domain control unit for aging test. When batch testing of multiple domain control units is required, this method needs to build aging test circuits for different electronic components for each domain control unit respectively. At the same time, each aging test circuit needs to be tested at least once, and the number of tests is large, which affects the test efficiency of the aging test.

[0051] For this reason, in one embodiment, an aging test circuit is provided. As Figure 1 shown, an aging test circuit provided in this embodiment includes: a DC power supply 1, a first domain control unit 10, a second domain control unit 20, and a controller (not shown); the output side of the DC power supply 1 is connected to the first side of the first domain control unit 10 and the first side of the second domain control unit 20, and the second side of the first domain control unit 10 is connected to the second side of the second domain control unit 20; the controller is used to control the first domain control unit 10 to be in an inversion state and control the second domain control unit 20 to be in a rectification state; or control the first domain control unit 10 to be in a rectification state and control the second domain control unit 20 to be in an inversion state.

[0052] In some embodiments, the DC power supply 1 can be a high-voltage DC power supply of 150-800V. Exemplarily, the DC power supply 1 can be an AC input DC output high-voltage power supply, and its AC input terminal can be connected to the power grid to convert the alternating current of the power grid into direct current for output. As Figure 2 shown, the DC power supply 1 is connected to the power grid through the connected live wire L, neutral wire N, and ground wire PE. Or, the DC power supply can also be an independent high-voltage DC power supply, such as a storage battery, etc.

[0053] The first domain control unit 10 may include a motor controller or a bi-directional charger. The motor controller may be a motor controller of an electric vehicle, which is responsible for converting the direct current of the power battery into the electric energy required by the drive motor and controlling its operating state (such as direction, speed, torque). In an electric vehicle, the motor controller can adjust the motor output in real time according to instructions such as the accelerator and brake, and support vehicle startup, acceleration, deceleration, and energy recovery. Specifically, it can execute functions including PWM (pulse width modulation) control, synchronous rectification technology, and multi-stage buck strategy, and achieve high-precision current and voltage regulation through inner and outer loop control. The motor controller can be a DC or AC permanent magnet synchronous motor controller, etc., and specifically can be a two-level, three-level, or multi-level controller, etc.

[0054] The bi-directional charger can be a bi-directional on-vehicle charger that supports bidirectional power flow. Its core functions include a rectification mode (charging mode): converting grid alternating current (AC) into high-voltage direct current (DC) to charge the power battery; an inversion mode (V2L / V2G): inverting the battery direct current into 220V alternating current to support power supply to external devices or feeding power back to the grid. The technical architecture can adopt two-stage conversion such as bi-directional AC-DC (PFC circuit) and DC-DC, and the topological structure can be LLC resonance or phase-shifted full bridge, etc.

[0055] In some embodiments, as Figure 2 shown, the positive pole of the output side of the DC power supply 1 is connected to the positive pole of the first side of the first domain control unit 10 and the positive pole of the first side of the second domain control unit 20, and the negative pole of the output side of the DC power supply 1 is connected to the negative pole of the first side of the first domain control unit 10 and the negative pole of the first side of the second domain control unit 20. The connection between the DC power supply 1 and the first domain control unit 10 can be a direct electrical connection with the first domain control unit 10, or an indirect electrical connection with the first domain control unit 10. Among them, the indirect electrical connection means that other components can also be electrically connected between the DC power supply 1 and the first domain control unit 10. For example, a current-limiting device such as a switching device or a diode can be connected in series between the DC power supply 1 and the first domain control unit 10. The connection between the DC power supply 1 and the second domain control unit 20 can be a direct electrical connection with the second domain control unit 20, or an indirect electrical connection with the second domain control unit 20.

[0056] The connection between the second side of the first domain control unit 10 and the second side of the second domain control unit 20 can be a direct electrical connection between the second side of the first domain control unit 10 and the second side of the second domain control unit 20, or an indirect electrical connection between the second side of the first domain control unit 10 and the second side of the second domain control unit 20. Exemplarily, if the first domain control unit 10 is a first motor controller and the second domain control unit 20 is a second motor controller, then the second side of the first domain control unit 10 is connected to the second side of the second domain control unit 20 through an isolation transformer T, as Figure 2 shown.

[0057] The first side of the first domain control unit 10 and the second domain control unit 20 can be the DC side, that is, for inputting or outputting direct current, and the second side of the first domain control unit 10 and the second domain control unit 20 can be the AC side, that is, for inputting or outputting alternating current.

[0058] The first domain control unit 10 and the second domain control unit 20 can be of the same type of domain control unit. The third side of the first domain control unit 10 and the second domain control unit 20 can also be connected to the low-voltage power supply 2, such as connecting to a 12V low-voltage power supply, to supply power to some electronic devices of the first domain control unit 10 and the second domain control unit 20, such as Figure 2 as shown.

[0059] The controller can be connected to the first domain control unit 10 and the second domain control unit 20 through CAN communication / CC / CP signal devices to control the working states or working modes of the first domain control unit 10 and the second domain control unit 20. Among them, the controller can be an electronic device such as a mobile terminal, a desktop terminal or a server.

[0060] In some embodiments, when aging tests need to be performed on the domain control unit, the controller can control the first domain control unit 10 to be in the inverter state and control the second domain control unit 20 to be in the rectifier state. At this time, the first domain control unit 10 operates in the inverter mode, which is used to convert direct current into alternating current, and the second domain control unit 20 operates in the rectifier mode, which is used to convert alternating current into direct current. At this time, the direct current output by the DC power supply 1 is inverted into alternating current by the first domain control unit 10 and then output to the second domain control unit 20. The second domain control unit 20 rectifies the alternating current into direct current and then feeds it back to the first domain control unit 10 to supply energy to the first domain control unit 10 together with the DC power supply 1, so as to be able to test the inverter ability of the first domain control unit 10 and the rectifier ability of the second domain control unit 20 simultaneously.

[0061] Alternatively, the controller can control the first domain control unit 10 to be in the rectifier state and control the second domain control unit 20 to be in the inverter state. At this time, the first domain control unit 10 operates in the rectifier mode, which is used to convert alternating current into direct current, and the second domain control unit 20 operates in the inverter mode, which is used to convert direct current into alternating current. At this time, the direct current output by the DC power supply 1 is inverted into alternating current by the second domain control unit 20 and then output to the first domain control unit 10. The first domain control unit 10 rectifies the alternating current into direct current and then feeds it back to the second domain control unit 20 to supply energy to the second domain control unit 20 together with the DC power supply 1, so as to be able to test the inverter ability of the second domain control unit 20 and the rectifier ability of the first domain control unit 10 simultaneously.

[0062] To further improve the accuracy of the aging test, the controller can control the first domain control unit 10 to be in the inverter state and control the second domain control unit 20 to be in the rectifier state. After a preset time interval, the first domain control unit 10 is switched to the rectifier state, and the second domain control unit 20 is controlled to be switched to the inverter state. By repeating this process multiple times, the rectification and inversion capabilities of both the first domain control unit 10 and the second domain control unit 20 can be tested simultaneously.

[0063] By providing an aging test circuit, including: a DC power supply, a first domain control unit, a second domain control unit, and a controller; the output side of the DC power supply is connected to the first side of the first domain control unit and the first side of the second domain control unit, and the second side of the first domain control unit is connected to the second side of the second domain control unit; the controller is used to control the first domain control unit to be in the inverter state and control the second domain control unit to be in the rectifier state; or control the first domain control unit to be in the rectifier state and control the second domain control unit to be in the inverter state. Thus, it is possible to simultaneously perform aging tests on two domain control units through a single aging test circuit during one aging test process, effectively reducing the number of aging test circuits to be built and the number of tests required when batch testing domain control units, and improving the aging test efficiency of the domain control units.

[0064] To avoid affecting the accuracy of the aging test due to current backflow and reduce the test risk of the aging test, in some embodiments, as Figure 3 shown, the aging test circuit further includes a first diode D1, a second diode D2, a first switch unit K1, and a second switch unit K2;

[0065] The first diode D1 is disposed between the output side of the DC power supply and the first side of the first domain control unit 10, and is in a reverse cut-off state when the voltage of the DC power supply is higher than the voltage of the first domain control unit 10. The first switch unit K1 is connected in parallel across both ends of the first diode D1;

[0066] The second diode D2 is disposed between the output side of the DC power supply, the first side of the first domain control unit 10, and the first side of the second domain control unit 20, and is in a reverse cut-off state when the voltage of the DC power supply is higher than the voltage of the second domain control unit 20. The second switch unit K2 is connected in parallel across both ends of the second diode D2.

[0067] Among them, the first switch unit K1 and the second switch unit K2 can be switch components such as relays, disconnect switches, or thyristors.

[0068] As a possible implementation, the positive electrode of the first diode D1 is connected to the positive electrode on the first side of the first domain control unit 10, the negative electrode of the first diode D1 is connected to the positive electrode on the output side of the DC power supply 1, and the first switch unit K1 is connected in parallel across both ends of the first diode D1; the positive electrode of the second diode D2 is connected to the positive electrode on the first side of the second domain control unit 20, the negative electrode of the first diode D1 is connected to the positive electrode on the output side of the DC power supply 1 and the negative electrode of the second diode D2, and the second switch unit K2 is connected in parallel across both ends of the second diode D2.

[0069] As another possible implementation, as Figure 4 shown, the positive electrode of the first diode D1 is connected to the negative electrode on the output side of the DC power supply 1, the negative electrode of the first diode D1 is connected to the negative electrode on the first side of the first domain control unit 10, and the first switch unit K1 is connected in parallel across both ends of the first diode D1; the positive electrode of the second diode D2 is connected to the negative electrode on the output side of the DC power supply 1 and the positive electrode of the first diode D1, the negative electrode of the second diode D2 is connected to the negative electrode on the first side of the second domain control unit 20, and the second switch unit K2 is connected in parallel across both ends of the second diode D2.

[0070] As another possible implementation, the positive electrode of the first diode D1 is connected to the positive electrode on the first side of the first domain control unit 10, the negative electrode of the first diode D1 is connected to the positive electrode on the output side of the DC power supply 1, and the first switch unit K1 is connected in parallel across both ends of the first diode D1; the positive electrode of the second diode D2 is connected to the negative electrode on the output side of the DC power supply 1 and the negative electrode on the first side of the first domain control unit 10, the negative electrode of the second diode D2 is connected to the negative electrode on the first side of the second domain control unit 20, and the second switch unit K2 is connected in parallel across both ends of the second diode D2.

[0071] As yet another possible implementation, the positive electrode of the first diode D1 is connected to the negative electrode on the output side of the DC power supply 1, the negative electrode of the first diode D1 is connected to the negative electrode on the first side of the first domain control unit 10, and the first switch unit K1 is connected in parallel across both ends of the first diode D1; the positive electrode of the second diode D2 is connected to the positive electrode on the first side of the second domain control unit 20, the negative electrode of the first diode D1 is connected to the positive electrode on the output side of the DC power supply 1 and the positive electrode on the first side of the first domain control unit 10, and the second switch unit K2 is connected in parallel across both ends of the second diode D2.

[0072] When the first domain control unit 10 operates in the inverter state, the first switch unit K1 can be closed to form a loop between the DC power supply 1 and the first domain control unit 10; when the first domain control unit 10 operates in the rectifier state, the first switch unit K1 can be opened. At this time, if the voltage of the DC power supply 1 is higher than that of the first domain control unit 10, the first diode D1 will be in the reverse cut-off state to prevent the current of the DC power supply 1 from flowing into the first domain control unit 10.

[0073] Similarly, when the second domain control unit 20 operates in the inversion state, the second switch unit K2 can be closed to form a loop between the DC power supply 1 and the second domain control unit 20; when the second domain control unit 20 operates in the rectification state, the second switch unit K2 can be opened. At this time, if the voltage of the DC power supply 1 is higher than that of the second domain control unit 20, the second diode D2 will be in the reverse cut-off state, preventing the current of the DC power supply 1 from flowing into the second domain control unit 20. Thus, when the domain control unit is in the rectification state, the current of the DC power supply flowing into the domain control unit in the rectification state can be restricted, reducing the possibility of current backflow, thereby improving the accuracy of the aging test and reducing the test risk.

[0074] To further reduce the possibility of current backflow, as Figure 5 shown, in some embodiments, the aging test circuit further includes a third diode D3. The third diode D3 is disposed between the output side of the DC power supply and the first side of the first domain control unit 10 and the second domain control unit 20, and is in the conducting state when the voltage of the DC power supply is higher than the voltage of the first domain control unit 10 or the voltage of the second domain control unit 20.

[0075] As a possible implementation manner, the positive electrode of the third diode D3 is connected to the positive electrode of the output side of the DC power supply, and the negative electrode of the third diode D3 is connected to the first side of the first domain control unit 10 and the first side of the second domain control unit 20. For example, the negative electrode of the third diode D3 is connected to the first side of the first domain control unit 10 through the first diode D1, and / or the negative electrode of the third diode D3 is connected to the first side of the second domain control unit 20 through the second diode D2. As Figure 5 shown.

[0076] As another possible real-time manner, the negative electrode of the third diode D3 is connected to the negative electrode of the output side of the DC power supply, and the positive electrode of the third diode D3 is connected to the first side of the first domain control unit 10 and the first side of the second domain control unit 20.

[0077] In this way, when the voltage of the DC power supply is higher than the voltage of the first domain control unit 10 or the voltage of the second domain control unit 20, the third diode D3 is in the conducting state, and when the voltage of the DC power supply is lower than the voltage of the first domain control unit 10 or the voltage of the second domain control unit 20, the third diode D3 is in the reverse cut-off state. Thus, the current backflow from the first domain control unit or the second domain control unit to the DC power supply can be avoided, improving the accuracy of the aging test and reducing the test risk of the aging test.

[0078] To further improve the accuracy of the aging test and reduce the test risk of the aging test, in some embodiments, the controller is further configured to:

[0079] When the first domain control unit 10 is in the inverter state and the second domain control unit 20 is in the rectifier state, control the first switch unit K1 to close and the second switch unit K2 to open; or, when the first domain control unit 10 is in the rectifier state and the second domain control unit 20 is in the inverter state, control the first switch unit K1 to open and the second switch unit K2 to close.

[0080] In some embodiments, when the first domain control unit 10 is in the inverter state and the second domain control unit 20 is in the rectifier state, the controller can control the first switch unit K1 to close and at the same time control the second switch unit K2 to open. At this time, the direct current output by the DC power supply 1 can only flow into the first domain control unit 10 through the first switch unit K1 and cannot flow into the second domain control unit 20. The first domain control unit 10 converts the direct current output by the DC power supply 1 into alternating current and then outputs it to the second domain control unit 20. The second domain control unit 20 rectifies the alternating current into direct current and then feeds it back to the input side of the first domain control unit 10 to supply power to the first domain control unit 10 together with the DC power supply 1.

[0081] When the first domain control unit 10 is in the rectifier state and the second domain control unit 20 is in the inverter state, the controller can control the second switch unit K2 to close and at the same time control the first switch unit K1 to open. At this time, the direct current output by the DC power supply 1 can only flow into the second domain control unit 20 through the second switch unit K2 and cannot flow into the first domain control unit 10. The second domain control unit 20 converts the direct current output by the DC power supply 1 into alternating current and then outputs it to the first domain control unit 10. The first domain control unit 10 rectifies the alternating current into direct current and then feeds it back to the second domain control unit 20 to supply power to the second domain control unit 20 together with the DC power supply 1.

[0082] By controlling the first switch unit to close and the second switch unit to open when the first domain control unit is in the inverter state and the second domain control unit is in the rectifier state, and controlling the first switch unit to open and the second switch unit to close when the first domain control unit is in the rectifier state and the second domain control unit is in the inverter state, it is possible to adjust the switch unit according to the current state of the domain control unit during the aging test process, reduce the possibility of current backflow, improve the test accuracy, and reduce the test risk.

[0083] In some embodiments, as Figure 6 shown, the first domain control unit includes a first motor controller 101 and a first bi-directional charger 102, and the second domain control unit includes a second motor controller 201 and a second bi-directional charger 202;

[0084] The first sides of the first motor controller 101, the first bi-directional charger 102, the second motor controller 201, and the second bi-directional charger 202 are connected to the output side of the DC power supply;

[0085] The second side of the first motor controller 101 is connected to the second side of the second motor controller 201 through an isolation transformer, and the second side of the first bi-directional charger 102 is connected to the second side of the second bi-directional charger 202;

[0086] The controller is used to control the first motor controller 101 and the first bi-directional charger 102 to be in the inverter state, and control the second motor controller 201 and the second bi-directional charger 202 to be in the rectifier state; or, control the first motor controller 101 and the first bi-directional charger 102 to be in the rectifier state, and control the second motor controller 201 and the second bi-directional charger 202 to be in the inverter state.

[0087] As a possible implementation, as Figure 6 shown, the first side of the first motor controller 101 and the first side of the first bi-directional charger 102 are connected to the output side of the DC power supply 1 through a first diode, and the first side of the second motor controller 201 and the first side of the second bi-directional charger 202 are connected to the output side of the DC power supply 1 through a second diode. Since the second sides of the first motor controller 101 and the second motor controller 201 input or output three-phase alternating current, the second sides of the first motor controller 101 and the second motor controller 201 are connected through an isolation transformer T.

[0088] When aging tests need to be performed on the motor controller and the bi-directional charger, the controller can control the first motor controller 101 and the first bi-directional charger 102 to be in the inverter state, and control the second motor controller 201 and the second bi-directional charger 202 to be in the rectifier state. At this time, the first motor controller 101 and the first bi-directional charger 102 work in the inverter state, the second motor controller 201 is in the power generation state, and the second bi-directional charger 202 is in the charging state. At the same time, the controller controls the first switch unit to close and the second switch unit to open. At this time, the first motor controller 101 outputs three-phase alternating current, which is output to the second motor controller 201 through the isolation transformer T. The second motor controller 201 rectifies the alternating current into direct current and then feeds it back to the first sides of the first motor controller 101 and the first bi-directional charger 102. At the same time, the alternating current output by the DC input inversion of the first bi-directional charger 102 is used as the AC input of the second bi-directional charger 202, rectified into direct current and then fed back to the first sides of the first motor controller 101 and the first bi-directional charger 102.

[0089] The controller can also control the first motor controller 101 and the first bi-directional charger 102 to be in the rectification state, and control the second motor controller 201 and the second bi-directional charger 202 to be in the inversion state. At this time, the first motor controller 101 is in the power generation state, the first bi-directional charger 102 is in the charging state, the second motor controller 201 and the second bi-directional charger 202 are in the inversion state. Meanwhile, the controller controls the first switch unit to be disconnected and the second switch unit to be closed. At this time, the three-phase alternating current output by the second motor controller 201 passes through the isolation transformer T and is output to the first motor controller 101. The first motor controller 101 rectifies the alternating current into direct current and then feeds it back to the first side of the second motor controller 201 and the second bi-directional charger 202. At the same time, the alternating current output by the second bi-directional charger 202 through DC input inversion is used as the AC input of the first bi-directional charger 102, rectified into direct current and then fed back to the first side of the second motor controller 201 and the second bi-directional charger 202, thereby realizing the aging test of the motor controller and the bi-directional charger.

[0090] To save electric energy during the aging test process, in some embodiments, the controller is further configured to:

[0091] When the second motor controller 201 and the second bi-directional charger 202 are in the rectification state, according to the output voltage of the second bi-directional charger 202, control the output voltage of the second motor controller 201 to be adjusted to be less than the output voltage of the second bi-directional charger 202, and control the output voltage of the DC power supply to be adjusted to be less than the output voltage of the second motor controller 201; or, when the first motor controller 101 and the first bi-directional charger 102 are in the rectification state, according to the output voltage of the first bi-directional charger 102, control the output voltage of the first motor controller 101 to be adjusted to be less than the output voltage of the first bi-directional charger 102, and control the output voltage of the DC power supply to be adjusted to be less than the output voltage of the first motor controller 101.

[0092] In some embodiments, when the second motor controller 201 and the second bi-directional charger 202 are in the rectification state, the controller can determine the output voltage of the second bi-directional charger 202 by obtaining the output current of the second bi-directional charger 202. After detecting the output voltage of the second bi-directional charger 202, the output voltage of the second motor controller 201 is adjusted according to the output voltage of the second bi-directional charger 202. For example, the output voltage of the second motor controller 201 is adjusted by adjusting the output current of the second motor controller 201, so that the output voltage of the second motor controller 201 is less than the output voltage of the second bi-directional charger 202. Exemplarily, the output voltage of the second motor controller 201 can be adjusted to reach a preset voltage difference, such as about 3V, from the output voltage of the second bi-directional charger 202. After completing the adjustment of the output voltage of the second motor controller 201, the output voltage of the DC power supply 1 can be adjusted according to the output voltage of the second motor controller 201 at this time, so that the output voltage of the DC power supply 1 is less than the output voltage of the second motor controller 201. Exemplarily, the output voltage of the DC power supply 1 can be adjusted to reach a preset voltage difference, such as about 3V, from the output voltage of the second motor controller 201. Thus, the second bi-directional charger 202 outputs at full load, the second motor controller 201 outputs at rated power, and the remaining insufficient power is supplemented by the DC power supply 1.

[0093] When the first motor controller 101 and the first bi-directional charger 102 are in the rectification state, the controller can determine the output voltage of the first bi-directional charger 102 by obtaining the output current of the first bi-directional charger 102. After detecting the output voltage of the first bi-directional charger 102, the output voltage of the first motor controller 101 is adjusted according to the output voltage of the first bi-directional charger 102. For example, the output voltage of the first motor controller 101 is adjusted by adjusting the output current of the first motor controller 101, so that the output voltage of the first motor controller 101 is less than the output voltage of the first bi-directional charger 102. Exemplarily, the output voltage of the first motor controller 101 can be adjusted to reach a preset voltage difference, such as about 3V, from the output voltage of the first bi-directional charger 102. After completing the adjustment of the output voltage of the first motor controller 101, the output voltage of the DC power supply 1 can be adjusted according to the output voltage of the first motor controller 101 at this time, so that the output voltage of the DC power supply 1 is less than the output voltage of the first motor controller 101. Exemplarily, the output voltage of the DC power supply 1 can be adjusted to reach a preset voltage difference, such as about 3V, from the output voltage of the first motor controller 101. Thus, the first bi-directional charger 102 outputs at full load, the first motor controller 101 outputs at rated power, and the remaining insufficient power is supplemented by the DC power supply 1.

[0094] By adjusting the output voltages of the motor controller and the DC power supply according to the output voltage of the bi-directional charger, the bi-directional charger can output at full load while the motor controller outputs at its rated capacity, enabling the use of the feedback electrical energy for priority power supply through the bi-directional charger and the motor controller, thereby saving the electrical energy that the DC power supply needs to output during the aging test process.

[0095] To reduce the energy loss during the aging test process, in some embodiments, such as Figure 7 shown, the first domain control unit further includes a first DC / DC converter 103, and the second domain control unit further includes a second DC / DC converter 203; the first sides of the first DC / DC converter 103 and the second DC / DC converter 203 are connected to the output side of the DC power supply, and the second sides of the first DC / DC converter 103 and the second DC / DC converter 203 are used to connect to the power supply device.

[0096] In some embodiments, the first DC / DC converter 103 and the second DC / DC converter 203 can be in-vehicle DC-DC converters, which are used to convert high-voltage direct current into 12V / 24V low-voltage direct current. The first sides of the first DC / DC converter 103 and the second DC / DC converter 203 are connected to the output side of the DC power supply 1 through a first diode, and the first side of the second motor controller 201 and the first side of the second bi-directional charger 202 are connected to the output side of the DC power supply 1 through a second diode. The second sides of the first DC / DC converter 103 and the second DC / DC converter 203 are connected to the power grid through a grid-connected power supply 3, where the grid-connected power supply can include an inverter for converting low-voltage direct current into high-voltage alternating current. When the first side of the first DC / DC converter 103 or the second DC / DC converter 203 receives high-voltage direct current, the received high-voltage direct current can be converted into low-voltage direct current and then converted into high-voltage alternating current through the grid-connected power supply 3 and fed back to the power grid. For example, when the first switch unit K1 is closed, the first DC / DC converter 103 can receive the high-voltage direct current output by the DC power supply 1 and / or the second domain control unit, convert the received high-voltage direct current into low-voltage direct current, and then convert it into high-voltage alternating current through the grid-connected power supply 3 and feed it back to the power grid. Similarly, when the second switch unit K2 is closed, the second DC / DC converter 203 can receive the high-voltage direct current output by the DC power supply 1 and / or the first domain control unit, convert the received high-voltage direct current into low-voltage direct current, and then convert it into high-voltage alternating current through the grid-connected power supply 3 and feed it back to the power grid. Thus, the electrical energy during the aging test process can be recovered, reducing the energy loss during the aging test process.

[0097] Figure 8The flowchart of a control method for an aging test circuit provided by an embodiment of the present application is shown. The control method for the aging test circuit is applied to the aging test circuit in any of the above embodiments. Specifically, it can be applied to the controller in any of the above embodiments.

[0098] In some embodiments, the control method for the aging test circuit includes:

[0099] S101, controlling the first domain control unit to be in an inverter state and controlling the second domain control unit to be in a rectifier state; or, controlling the first domain control unit to be in a rectifier state and controlling the second domain control unit to be in an inverter state.

[0100] In some embodiments, the control method further includes:

[0101] When the first domain control unit is in an inverter state and the second domain control unit is in a rectifier state, controlling the first switch unit to close and the second switch unit to open; or, when the first domain control unit is in a rectifier state and the second domain control unit is in an inverter state, controlling the first switch unit to open and the second switch unit to close.

[0102] In some embodiments, controlling the first domain control unit to be in an inverter state and controlling the second domain control unit to be in a rectifier state; or, controlling the first domain control unit to be in a rectifier state and controlling the second domain control unit to be in an inverter state includes: controlling the first motor controller and the first bi-directional charger to be in an inverter state and controlling the second motor controller and the second bi-directional charger to be in a rectifier state; or, controlling the first motor controller and the first bi-directional charger to be in a rectifier state and controlling the second motor controller and the second bi-directional charger to be in an inverter state.

[0103] In some embodiments, the control method further includes:

[0104] When the second motor controller and the second bi-directional charger are in a rectifier state, according to the output voltage of the second bi-directional charger, controlling the output voltage of the second motor controller to be adjusted to be less than the output voltage of the second bi-directional charger, and controlling the output voltage of the DC power supply to be adjusted to be less than the output voltage of the second motor controller; or,

[0105] When the first motor controller and the first bi-directional charger are in a rectifier state, according to the output voltage of the first bi-directional charger, controlling the output voltage of the first motor controller to be adjusted to be less than the output voltage of the first bi-directional charger, and controlling the output voltage of the DC power supply to be adjusted to be less than the output voltage of the first motor controller.

[0106] The control device of the aging test circuit provided by the present application will be described below. The control device of the aging test circuit described below can be mutually referred to the control method of the aging test circuit described above.

[0107] In one embodiment, as Figure 9 shown, a control device of an aging test circuit is provided, including:

[0108] A control module 210, configured to control the first domain control unit to be in an inversion state and control the second domain control unit to be in a rectification state; or, control the first domain control unit to be in a rectification state and control the second domain control unit to be in an inversion state.

[0109] In one embodiment, the control module 210 is further configured to:

[0110] When the first domain control unit is in an inversion state and the second domain control unit is in a rectification state, control the first switch unit to close and the second switch unit to open; or, when the first domain control unit is in a rectification state and the second domain control unit is in an inversion state, control the first switch unit to open and the second switch unit to close.

[0111] In one embodiment, the control module 210 is specifically configured to:

[0112] Control the first motor controller and the first bi-directional charger to be in an inversion state, and control the second motor controller and the second bi-directional charger to be in a rectification state; or, control the first motor controller and the first bi-directional charger to be in a rectification state, and control the second motor controller and the second bi-directional charger to be in an inversion state.

[0113] In one embodiment, the control module 210 is further configured to:

[0114] When the second motor controller and the second bi-directional charger are in a rectification state, according to the output voltage of the second bi-directional charger, control the output voltage of the second motor controller to be adjusted to be less than the output voltage of the second bi-directional charger, and control the output voltage of the DC power supply to be adjusted to be less than the output voltage of the second motor controller; or,

[0115] When the first motor controller and the first bi-directional charger are in a rectification state, according to the output voltage of the first bi-directional charger, control the output voltage of the first motor controller to be adjusted to be less than the output voltage of the first bi-directional charger, and control the output voltage of the DC power supply to be adjusted to be less than the output voltage of the first motor controller.

[0116] Figure 10 An entity structure schematic diagram of an electronic device is exemplified, as Figure 10 shown. The electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840. Among them, the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 can call a computer program in the memory 830 to execute the control method of the aging test circuit, for example, including:

[0117] Controlling the first domain control unit to be in an inverter state and controlling the second domain control unit to be in a rectifier state; or, controlling the first domain control unit to be in a rectifier state and controlling the second domain control unit to be in an inverter state.

[0118] In addition, when the logical instructions in the above-mentioned memory 830 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0119] On the other hand, the embodiments of the present application also provide a storage medium. The storage medium includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the aging test circuit provided in the above-mentioned various embodiments, for example, including:

[0120] Controlling the first domain control unit to be in an inverter state and controlling the second domain control unit to be in a rectifier state; or, controlling the first domain control unit to be in a rectifier state and controlling the second domain control unit to be in an inverter state.

[0121] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative work.

[0122] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An aging test circuit, characterized in that, Comprising: A DC power supply, a first domain control unit, a second domain control unit, and a controller; The output side of the DC power supply is connected to the first side of the first domain control unit and the first side of the second domain control unit, and the second side of the first domain control unit is connected to the second side of the second domain control unit; The controller is used to control the first domain control unit to be in an inversion state and control the second domain control unit to be in a rectification state; or, control the first domain control unit to be in a rectification state and control the second domain control unit to be in an inversion state.

2. The aging test circuit according to claim 1, wherein Further comprising: A first diode, a second diode, a first switch unit, and a second switch unit; The first diode is disposed between the output side of the DC power supply and the first side of the first domain control unit, and is in a reverse cut-off state when the voltage of the DC power supply is higher than the voltage of the first domain control unit. The first switch unit is connected in parallel across both ends of the first diode; The second diode is disposed between the output side of the DC power supply and the first side of the first domain control unit and the first side of the second domain control unit, and is in a reverse cut-off state when the voltage of the DC power supply is higher than the voltage of the second domain control unit. The second switch unit is connected in parallel across both ends of the second diode.

3. The aging test circuit according to claim 2, wherein Further comprising a third diode, which is disposed between the output side of the DC power supply and the first sides of the first domain control unit and the second domain control unit, and is in a conducting state when the voltage of the DC power supply is higher than the voltage of the first domain control unit or the voltage of the second domain control unit.

4. The aging test circuit according to claim 2, wherein The controller is further used for: When the first domain control unit is in an inversion state and the second domain control unit is in a rectification state, controlling the first switch unit to close and the second switch unit to open; Or, When the first domain control unit is in a rectification state and the second domain control unit is in an inversion state, controlling the first switch unit to open and the second switch unit to close.

5. The aging test circuit according to any one of claims 1-4, characterized in that The first domain control unit includes a first motor controller and a first bi-directional charger, and the second domain control unit includes a second motor controller and a second bi-directional charger; The first sides of the first motor controller, the first bi-directional charger, the second motor controller, and the second bi-directional charger are connected to the output side of the DC power supply; The second side of the first motor controller is connected to the second side of the second motor controller through an isolation transformer, and the second side of the first bi-directional charger is connected to the second side of the second bi-directional charger; Specifically, the controller is used for: Controlling the first motor controller and the first bi-directional charger to be in an inversion state, and controlling the second motor controller and the second bi-directional charger to be in a rectification state; or, controlling the first motor controller and the first bi-directional charger to be in a rectification state, and controlling the second motor controller and the second bi-directional charger to be in an inversion state.

6. The aging test circuit according to claim 5, wherein The controller is further used for: When the second motor controller and the second bi-directional charger are in the rectification state, according to the output voltage of the second bi-directional charger, control the output voltage of the second motor controller to be adjusted to be less than the output voltage of the second bi-directional charger, and control the output voltage of the DC power supply to be adjusted to be less than the output voltage of the second motor controller; or, When the first motor controller and the first bi-directional charger are in the rectification state, according to the output voltage of the first bi-directional charger, control the output voltage of the first motor controller to be adjusted to be less than the output voltage of the first bi-directional charger, and control the output voltage of the DC power supply to be adjusted to be less than the output voltage of the first motor controller.

7. The aging test circuit according to claim 5, wherein The first domain control unit further includes a first DC / DC converter, and the second domain control unit further includes a second DC / DC converter; The first sides of the first DC / DC converter and the second DC / DC converter are connected to the output side of the DC power supply, and the second sides of the first DC / DC converter and the second DC / DC converter are used to access a power supply device.

8. A control method for an aging test circuit, characterized in that, Applied to the aging test circuit according to any one of claims 1-7, comprising: Control the first domain control unit to be in the inversion state and control the second domain control unit to be in the rectification state; or, control the first domain control unit to be in the rectification state and control the second domain control unit to be in the inversion state.

9. A control device for an aging test circuit, characterized in that Applied to the aging test circuit according to any one of claims 1-7, comprising: A control module for controlling the first domain control unit to be in the inversion state and controlling the second domain control unit to be in the rectification state; or, controlling the first domain control unit to be in the rectification state and controlling the second domain control unit to be in the inversion state.

10. An electronic device, comprising a processor and a memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the control method of the aging test circuit according to claim 8.

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