An inverter aging test device

Abstract

The utility model provides a kind of inverter aging test device, including test host and aging cabinet, the test host with the aging cabinet electric connection, the aging cabinet is used to place the inverter and supporting battery of to-be-tested;The test host includes power supply module, towed control module and charging module, the power supply module selectively connects commercial power, 24V battery or 48V battery, to realize commercial power supply or battery power supply mode switching;The towed control module is used to control two inverter to realize automatic forward towed and reverse towed, the forward towed is inverter A towed inverter B operation aging, the reverse towed is inverter B towed inverter A operation aging;The aging cabinet includes external battery compartment, multiple pairs of inverter placing rack, electromagnetic door lock, PTC heater and three combined power system.The device can realize commercial power and battery double mode power supply, automatic positive and negative towed aging and efficient and safe test environment guarantee.

Description

Technical Field

[0001] This utility model relates to the field of power electronic equipment testing technology, and in particular to an inverter aging test device. Background Technology

[0002] Inverters, as core equipment in photovoltaic systems and other power conversion devices, must undergo thorough aging tests before leaving the factory to ensure operational stability. Existing inverter aging test equipment has the following shortcomings: 1. The power supply mode is limited, mostly supporting only AC power or single-voltage battery power, which cannot meet the testing requirements of different inverter models for 24V and 48V battery power supply. 2. The aging process is fixed as unidirectional (e.g., only A drives B), which results in insufficient aging tests of the driven inverters and makes it difficult to fully verify the equipment performance. 3. The battery requires an external charging device to replenish power, which is cumbersome and the test is easily interrupted due to insufficient power.

[0003] To address the aforementioned issues, there is an urgent need for an aging test device that integrates dual power supply, automatic forward and reverse dragging, battery self-charging, and a safe adaptation cabinet, in order to improve the efficiency, adequacy, and safety of inverter aging tests. Utility Model Content

[0004] To address the aforementioned issues, this invention provides an inverter aging test device that enables dual-mode power supply from mains and battery, automatic forward and reverse aging, and efficient and safe testing environment.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: An inverter aging test device includes a test host and an aging cabinet, wherein the test host is electrically connected to the aging cabinet, and the aging cabinet is used to place the inverter to be tested and its matching battery. The test host includes a power supply module, a drive control module, and a charging module. The power supply module can be selectively connected to AC power, a 24V battery, or a 48V battery to switch between AC power and battery power modes. The drive control module controls two inverters to achieve automatic forward and reverse drive. Forward drive involves inverter A driving inverter B for aging operation, while reverse drive involves inverter B driving inverter A for aging operation. The charging module is connected to the power supply module and is used to charge the 24V battery or the 48V battery in AC power mode. The aging chamber includes an external battery compartment, multiple inverter racks, an electromagnetic door lock, a PTC heater, and a three-phase power system. The external battery compartment is used to hold 24V or 48V batteries. The multiple inverter racks are arranged back-to-back and are used to fix inverter A and inverter B to be tested, respectively. The electromagnetic door lock is used to close the door of the aging chamber. The PTC heater is located inside the aging chamber. The three-phase power system is connected to the power supply module of the test host to reduce the impact on the factory power system during operation.

[0006] Preferably, the power supply module is provided with an AC power interface, a 24V battery interface and a 48V battery interface; the AC power interface is used to connect to AC power, the 24V battery interface is used to connect to a 24V battery, and the 48V battery interface is used to connect to a 48V battery.

[0007] Preferably, the charging module is connected in parallel between the AC power interface and the 24V battery interface of the power supply module, or in parallel between the AC power interface and the 48V battery interface, so as to selectively charge the 24V battery or the 48V battery.

[0008] Preferably, the inner wall of the aging cabinet is made of high-temperature resistant insulation board.

[0009] Preferably, the inverter placement rack has a flexible hollow structure. Multiple pairs of vertical mounting rails are fixedly installed inside the aging cabinet. The mounting rails have multiple insertion holes. Hanging arms are fixed to the top of both sides of the inverter placement rack. Plugs that can be inserted into the insertion holes are fixed to the hanging arms. A cavity is provided inside the end of the plug. A pair of wedge blocks are elastically connected to the cavity by a spring. Both wedge blocks extend out of the cavity and abut against the back of the mounting rail. A support plate that abuts against the mounting rail is also fixed to the bottom of the inverter placement rack.

[0010] Preferably, the cabinet door of the aging cabinet is made of a large area of ​​tempered glass.

[0011] Preferably, the electromagnetic door lock is equipped with a one-button unlocking button, which is installed on the cabinet door.

[0012] Preferably, the drive control module controls inverter A to drive inverter B for aging operation in AC power supply mode, and controls inverter B to drive inverter A for aging operation in battery power supply mode.

[0013] Preferably, the three-phase power of the three-combination power system is supplied by three cabinets, with each cabinet using one phase of power, ensuring that the power supply to each cabinet is balanced and minimizing the impact on the factory's power system.

[0014] The beneficial effects of this utility model are as follows: 1. Flexible power supply: It can be powered by AC power + 24V / 48V battery in dual modes, which can match the testing requirements of different inverter models without the need to change the testing equipment.

[0015] 2. Thorough and comprehensive testing: Automatic forward and reverse drag design (A drags B, B drags A) ensures that each inverter completes aging as both a "drone" and a "drone", avoiding blind spots in testing.

[0016] 3. Battery power guarantee: Automatically charges the battery in AC power mode, eliminating the need for additional external devices and preventing test interruptions due to insufficient battery power.

[0017] 4. Safe, energy-saving and efficient: The external battery compartment reduces safety risks and facilitates maintenance; the flexible hollow placement rack improves adaptability and heat dissipation efficiency; the PTC heater and the three-combination power system respectively achieve energy-saving temperature control and low power impact, meeting the needs of factory production.

[0018] 5. The inverter mounting rack can be quickly inserted into the corresponding height socket on the mounting rail through the form of hanging arms and plugs. The height is adjustable and highly adaptable. Attached Figure Description

[0019] Figure 1 This is a front perspective view of the present utility model; Figure 2 This is a front view of the present invention; Figure 3 This is a perspective view of the back of the present invention; Figure 4 This is a flowchart of the photovoltaic aging test of this utility model; Figure 5 This is a schematic diagram of the hanging arm structure proposed in this utility model; Figure 6 for Figure 5 A magnified schematic diagram of the structure at point A in the diagram.

[0020] In the diagram: 1. Aging cabinet, 2. Cabinet door, 3. Three-way power system, 4. External battery compartment, 5. Inverter rack, 6. Spring, 7. Mounting rail, 8. PTC heater, 9. One-button unlocking, 10. Electromagnetic door lock, 11. Inverter, 12. Inverter A, 13. Inverter B, 14. Support plate, 15. Socket, 16. Hanging arm, 17. Wedge block, 18. Plug. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] Reference Figure 1-6 An inverter aging test device includes a test host and an aging cabinet 1. The test host is used to realize power supply switching, automatic drive control, and battery charging, including: Power supply module: It is equipped with an AC power interface, a 24V battery interface and a 48V battery interface, and the AC power supply or the corresponding voltage battery power supply mode can be selected according to the inverter model. Driving control module: Configured with 1-to-1 driving logic, supporting automatic switching between forward driving (inverter A12 driving inverter B13) and reverse driving (inverter B13 driving inverter A12), ensuring that both inverters 11 are fully aged. Charging module: Electrically connected to the AC power interface and battery interface, automatically charging the 24V or 48V battery in AC power mode to ensure the power demand in battery power mode.

[0023] Aging cabinet 1 provides a testing environment for the inverter, and its structural design includes: External battery compartment 4: The battery compartment is independent of the cabinet exterior, and the inner wall is made of high temperature resistant insulation board, which has the advantages of good heat dissipation, not taking up extra space, easy maintenance of battery packs and timely detection of dangers; Flexible hollow placement rack: Used to place inverters A12 and B13 to be tested. The rack adopts a flexible design to adapt to various inverter models and has a hollow structure (reducing weight and facilitating heat conduction). It also supports height adjustment. Specifically, the inverter placement rack 5 has a flexible hollow structure. Multiple pairs of vertical mounting rails 7 are fixedly installed inside the aging cabinet 1. Each mounting rail 7 has multiple insertion holes 15. Hanging arms 16 are fixed to the top of both sides of the inverter placement rack 5. Plugs 18 that can be inserted into the insertion holes 15 are fixed to the hanging arms 16. The ends of the plugs 18 have cavities. A pair of wedge-shaped blocks 17 are elastically connected to the cavities via springs 6. Both wedge-shaped blocks 17 extend out of the cavities and abut against the back of the mounting rails 7. A support plate 14 is also fixed to the bottom of the inverter placement rack 5, abutting against the mounting rails 7. According to actual needs, the height of the inverter placement rack 5 can be adjusted. Simply insert the plug 18 into the insertion hole 15 at the corresponding height on the mounting rail 7. The pair of wedge-shaped blocks 17 will pop out under the action of the springs 6, abutting against the back of the mounting rails 7, thus hanging the inverter placement rack 5. The support plate 14 is supported on the mounting rails 7 at the bottom, improving stability and ease of use.

[0024] Electromagnetic door lock 10: Replaces traditional door locks, improves cabinet airtightness, and features a one-button unlocking mechanism 9 for convenient operation; PTC heater 8: Built inside the cabinet, it achieves safe, efficient, and energy-saving heating and temperature control, ensuring stable temperature in the aging test environment; Three-phase power system 3: The three-phase power uses three cabinets, with each cabinet using one phase of power to ensure that the power supply to each cabinet is balanced, which reduces the impact on the factory's power system. It is electrically connected to the power supply module of the test host.

[0025] The following aging test modes are adopted: 1. Mains power supply mode (24V battery charging) When this mode is selected, the power supply module switches to the mains interface, and the drive control module controls inverter A12 to drive inverter B13 for aging; at the same time, the charging module starts to charge the 24V battery through the mains power to store energy.

[0026] 2. Mains power supply mode (48V battery charging) When this mode is selected, the power supply module maintains mains power supply, the drive control module maintains the aging state of inverter A12 driving inverter B13, and the charging module switches to the 48V battery interface to charge the 48V battery.

[0027] Battery powered mode (24V power supply) When this mode is selected, the power supply module switches to the 24V battery interface, and the system is powered by a fully charged 24V battery; the towing control module switches in the opposite direction, controlling inverter B13 to tow inverter A12 for aging, ensuring that inverter A12 is fully tested.

[0028] 4. Battery powered mode (48V power supply) When this mode is selected, the power supply module switches to the 48V battery interface and is powered by the 48V battery; the towing control module maintains the aging state of inverter B13 towing inverter A12 and completes the reverse aging test of inverter A12.

[0029] Throughout the testing process, the PTC heater 8 of the aging cabinet 1 maintains a stable internal temperature, the external battery compartment 4 dissipates heat in real time, and the operator can observe the internal status through the tempered glass cabinet door 2. If maintenance is required, the cabinet door 2 can be opened by pressing the one-key unlock button 9 of the electromagnetic door lock 10. The three-combination power system 3 ensures that the power supply of other equipment in the factory is not affected when the device is running.

[0030] This utility model achieves automation, comprehensiveness, and safety in inverter aging testing by integrating a test host and a dedicated aging cabinet 1. It fully meets the technical requirements of "dual power supply, forward and reverse dragging, battery self-charging, and safety cabinet" in the document and can be widely used in the factory testing of inverters.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An inverter aging test device, characterized in that, It includes a test host and an aging cabinet (1), the test host is electrically connected to the aging cabinet (1), and the aging cabinet (1) is used to place the inverter (11) to be tested and its matching battery; The test host includes a power supply module, a drag control module, and a charging module. The power supply module can be selectively connected to mains power, a 24V battery, or a 48V battery to achieve switching between mains power supply and battery power supply modes. The drag control module is used to control two inverters (11) to achieve automatic forward drag and reverse drag. The forward drag is for inverter A (12) to drag inverter B (13) for aging operation, and the reverse drag is for inverter B (13) to drag inverter A (12) for aging operation. The charging module is connected to the power supply module and is used to charge the 24V battery or the 48V battery in mains power supply mode. The aging cabinet (1) includes an external battery compartment (4), multiple inverter racks (5), an electromagnetic door lock (10), a PTC heater (8), and a three-combination power system (3); the external battery compartment (4) is used to place 24V or 48V batteries; the multiple inverter racks (5) are arranged back to back and are used to fix the inverter A (12) and inverter B (13) to be tested, respectively; the electromagnetic door lock (10) is used to close the cabinet door (2) of the aging cabinet (1); the PTC heater (8) is located inside the aging cabinet (1); the three-combination power system (3) is connected to the power supply module of the test host and is used to reduce the impact on the factory power system when the device is running.

2. The inverter aging test device according to claim 1, characterized in that, The power supply module is equipped with an AC power interface, a 24V battery interface, and a 48V battery interface; the AC power interface is used to connect to AC power, the 24V battery interface is used to connect to a 24V battery, and the 48V battery interface is used to connect to a 48V battery.

3. The inverter aging test device according to claim 1, characterized in that, The charging module is connected in parallel between the AC power interface and the 24V battery interface of the power supply module, or in parallel between the AC power interface and the 48V battery interface, so as to selectively charge the 24V battery or the 48V battery.

4. The inverter aging test device according to claim 1, characterized in that, The inner wall of the aging cabinet (1) is made of high-temperature resistant insulation board.

5. The inverter aging test device according to claim 1, characterized in that, The inverter placement rack (5) has a flexible hollow structure. Multiple pairs of vertical mounting rails (7) are fixedly installed inside the aging cabinet (1). Multiple sockets (15) are provided on the mounting rails (7). Hanging arms (16) are fixed on both top sides of the inverter placement rack (5). Plugs (18) that can be inserted into the sockets (15) are fixed on the hanging arms (16). A cavity is provided at the end of the plug (18). A pair of wedge blocks (17) are elastically connected to the cavity by a spring (6). Both wedge blocks (17) extend out of the cavity and abut against the back of the mounting rails (7). A support plate (14) that abuts against the mounting rails (7) is also fixed at the bottom of the inverter placement rack (5).

6. The inverter aging test device according to claim 1, characterized in that, The cabinet door (2) of the aging cabinet (1) is made of large-area tempered glass.

7. The inverter aging test device according to claim 1, characterized in that, The electromagnetic door lock (10) is equipped with a one-button unlocking button (9), which is installed on the cabinet door (2).

8. The inverter aging test device according to claim 1, characterized in that, The drive control module controls inverter A (12) to drive inverter B (13) for aging in the mains power supply mode, and controls inverter B (13) to drive inverter A (12) for aging in the battery power supply mode.

9. The inverter aging test device according to claim 1, characterized in that, The three-phase power system (3) uses three cabinets, with each cabinet using one phase of power, to ensure that the power in each cabinet is balanced and to minimize the impact on the factory's power system.

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