Modular composite bidirectional dc test power supply device

Abstract

The application discloses a modular composite bidirectional direct-current test power supply device and belongs to the technical field of power supply testing. The device comprises a casing, wherein a test assembly is arranged on the casing. The test assembly comprises a load test plate arranged at the bottom of the casing. A plurality of reinforcing pins for current transmission are inserted into the load test plate. A plurality of conductive connectors are fixedly arranged on each reinforcing pin. The power supply is used as a load to absorb energy or discharge test. The transient response of the power supply during fast charging and discharging is simulated. The first contact can be in contact with the second contact on each first pin needle. The current frequency converter can transmit the current frequency to the conversion lead plate through the wire. After the first contact and the second contact are in contact with each other, the current frequency is transmitted to the charging and discharging controller through the second pin, the conductive connector and the load test plate. The charging and discharging synchronous test function of the power supply is realized. The limit working condition simulation and energy efficiency detection of the bidirectional energy flow equipment are realized.

Description

Modular composite bidirectional DC test power supply device Technical Field

[0001] This invention relates to the field of power supply testing technology, and more specifically to a modular composite bidirectional DC test power supply device. Background Technology

[0002] With the rapid development of new energy industries, such as wind power generation, photovoltaic power generation, and new energy vehicles, high-power power electronic equipment is being used more and more widely. These power electronic equipment require corresponding test power supplies in the research and development or production stages to conduct corresponding electrical and power tests.

[0003] Among them, the patent with publication number CN109194179A discloses a high-power bidirectional AC / DC integrated power supply device. When in use, this structure adopts the NPC I-type circuit topology compared with the ordinary three-phase bidirectional half-bridge circuit through the first three-phase bidirectional half-bridge circuit and the second three-phase bidirectional half-bridge circuit. It can achieve higher voltage DC or AC output. However, when the device absorbs electrical energy for testing, it cannot feed the energy back to the grid or energy storage system (energy feedback function). The single voltage output is prone to power loss, affecting the convenience of testing, and cannot realize the function of simultaneous charging and discharging testing. Summary of the Invention

[0004] This invention provides a modular composite bidirectional DC test power supply device, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a modular composite bidirectional DC test power supply device, including a housing, on which test components are disposed.

[0006] The test assembly includes a load test board located at the bottom of the housing. The load test board has several reinforcing pins for current transmission, and each reinforcing pin has several conductive connectors fixedly installed on it.

[0007] Both sides of the bottom of the housing are bolted with connecting plates, and each connecting plate is fixedly provided with a limit block. The outer sides of the two limit blocks are slidably connected with a clamping plate. The two connecting plates are arranged opposite to each other, and one end of each clamping plate is provided with a reduction slope. A conductive rod is slidably connected to the clamping plate.

[0008] The top of the housing is provided with a nylon base and a current storage device. A nylon clip is provided on the current storage device, and a conversion lead plate is inserted into the nylon clip. First contacts are embedded on both sides of the bottom of the conversion lead plate.

[0009] The current storage device is provided with two first pins that are both inductive to the conversion lead plate, and each first pin is embedded with a second contact. The bottom of the current storage device is provided with several second pins.

[0010] A feeding frame is provided at the bottom of the connecting plate. A power transfer assembly is rotatably connected inside the feeding frame. A servo motor for driving the rotation of the power transfer assembly is provided at one end of the feeding frame. The power transfer assembly includes a polygonal rod, clamping plates, a crossbar, and electric push rods. The polygonal rod is rotatably connected inside the feeding frame. Several clamping plates are distributed on the outer side of the polygonal rod, and a feeding cavity is formed between each pair of adjacent clamping plates. A crossbar is fixed to the inner wall of the feeding frame in the middle of the polygonal rod. Two electric push rods for pushing the material are provided on the crossbar. Several through holes are opened on the outer side of the polygonal rod, each located in a corresponding feeding cavity. A servo motor for driving the rotation of the polygonal rod is provided at one end of the feeding frame.

[0011] As can be seen, in the above technical solution, the power supply charging and discharging conversion is achieved by changing the displacement of the lead plate to contact different first pins, which makes it easy to quickly switch the test state. It can also adjust the depth of the second pin inserted into the misalignment port, thereby adjusting the number of conductive connectors on each reinforcing pin that contact the second pin, increasing the total current carrying capacity, reducing the current load of a single conductive connector, and avoiding excessive circuit inductance caused by voltage fluctuations during the test.

[0012] The current storage device is inserted into the top of the nylon base. A current inverter is installed on the top of the current storage device. The conversion lead plate is connected to the current inverter via wires. A nylon L-frame is bolted to one side of the current inverter. A nylon plate is rotatably connected to one end of the nylon L-frame. A nylon clip is snapped onto the nylon plate. The nylon base has several misaligned openings. Multiple reinforcing pins are located in the corresponding nylon L-frames. A digital signal converter is embedded in the bottom of the current storage device's inner cavity and is soldered to the second pin. A first transmission interface is bolted to the bottom of the inner wall of the digital signal converter. A micro motor is installed on one side of the inner wall of the current storage device. The first transmission interface is provided on the digital signal converter. A CAN bus processor is mounted on the output end of the micro motor via an electric slip ring. Several second transmission interfaces are provided on the outside of the CAN bus processor. Multiple second pins extend into the corresponding misaligned openings and contact the conductive connectors.

[0013] As can be seen, in the above technical solution, the second pin is inserted into the misaligned slot and contacts the reinforcing pin and the conductive connector. The nylon plate is deflected at the end of the nylon L-frame by the electric push rod, which in turn changes the position of the nylon clip and the conversion lead plate. This allows the first contact to contact the second contact on each of the first pins, so that the current frequency converter can convert the current frequency and transmit it to the conversion lead plate through the wire. After the first and second contacts contact and transmit the current to each other, it is transmitted to the charge and discharge controller through the second pin, the conductive connector and the load test board. This realizes the function of synchronous charging and discharging test on the power supply, and realizes the extreme working condition simulation and energy efficiency detection of the bidirectional energy flow equipment.

[0014] An electric push rod is bolted to one side of the nylon L-frame, and the output end of the electric push rod extends to one side of the nylon plate. A return spring is hooked at the top of the nylon L-frame, and one end of the return spring extends to the top of the nylon plate and hooks onto the nylon plate. A controller is provided at one end of the nylon base, and a display screen is provided on the controller. The controller is connected to the current memory and the current inverter via wires. Connecting plates are bolted to both sides of the bottom of the housing, and a limit block is fixedly provided in each connecting plate. A locking plate is slidably connected to the outer side of each of the two limit blocks. The two connecting plates are arranged opposite each other, and a reduction slope is provided at one end of each locking plate. A conductive rod is slidably connected to the locking plate, one end of which passes through the locking plate and extends to the outer side of the locking plate. A positioning spring is provided at the other end of the conductive rod and is embedded in the locking plate.

[0015] As can be seen, in the above technical solution, the card plate and the conductive rod are displaced by force. When the conductive rod is retracted into the card plate, the positioning spring is compressed. The elasticity of the positioning spring drives the conductive rod and the card plate to reset, so that the device can be installed on the power supply. At the same time, the conductive rod can also abut against the electrodes of the power supply to conduct current. When the card plate is reset, it is locked on the outside of the power supply to position the power supply and prevent the power supply from falling off and causing a disconnection phenomenon that leads to inaccurate testing. In addition, the slope at the end of the card plate reduces the friction between the card plate and the power supply, making the device installation and testing smoother. When the electrodes on the power supply come into contact with the conductive rod, the current can be guided through the guide wire.

[0016] A guide wire is welded to one end of the conductive rod facing the limiting block, and a charge / discharge controller is welded to one end of the guide wire. The charge / discharge controller is embedded in the end of the housing and connected to the load test board via a wire.

[0017] As can be seen, in the above technical solution, the power supply is converted and transmitted through the charge and discharge controller, so that the power supply can absorb energy as a load or perform discharge tests, simulating the transient response of the power supply during rapid charge and discharge.

[0018] The present invention has the following advantages:

[0019] 1. Based on the elastic drive of the positioning spring to reset the conductive rod and the clamping plate, this invention not only facilitates the installation of the device on the power supply, but also allows it to conduct current by contacting the electrodes of the power supply. The reset clamping plate is positioned on the outside of the power supply to prevent the power supply from falling off and causing disconnection, which would lead to inaccurate testing. Furthermore, the reduced slope at the end of the clamping plate reduces the friction between the clamping plate and the power supply, making the installation and testing of the device smoother.

[0020] 2. This invention uses an electric push rod to drive a switching lead plate to quickly switch the contact state of the contacts, enabling simultaneous charge and discharge testing. It simulates the transient characteristics of the power supply during rapid charge and discharge cycles, such as pulse current surges. Compared to single-state testing, it can more comprehensively test the power supply's performance under extreme conditions, such as rapid charging and discharging of electric vehicles and grid fluctuations in energy storage systems. This provides more accurate data support for product reliability verification. Furthermore, the use of a multi-sided rotating rod allows for individual loading and testing of each power supply, improving testing efficiency.

[0021] 3. The positions of the nylon clip and the conversion lead plate of this invention can be changed, so that the first contact can contact the second contact on each of the first pins respectively. This allows the current frequency converter to convert the current and transmit it to the conversion lead plate through the wire, realizing the function of synchronous charging and discharging test on the power supply. It realizes the extreme condition simulation and energy efficiency detection of bidirectional energy flow equipment, supports flexible expansion or replacement of load modules according to test requirements, and is suitable for different power levels. Furthermore, the charging and discharging conversion of the power supply is realized by the displacement of the conversion lead plate to contact different first pins, which is easy to quickly switch test states. It can also adjust the depth of the second pin inserted into the misalignment port, thereby adjusting the number of conductive connectors on each reinforced pin contacting the second pin, increasing the total current carrying capacity, reducing the current load of a single conductive connector, and avoiding excessive circuit inductance caused by voltage fluctuations during the test.

[0022] 4. The slope reduction design of the card plate in this invention reduces installation friction, and the positioning spring and reset spring ensure tight contact of conductive parts to avoid contact failure caused by vibration; the charge and discharge controller has modular integrated overcharge, over-discharge and overcurrent protection functions, which can quickly cut off the circuit under abnormal conditions to ensure the safety of the test process.

[0023] 5. In this invention, the current transmitted through the second pin is converted into digital information by a digital signal converter. The digital signal is then transmitted to the second transmission interface through contact between the first and second transmission interfaces. The signal is then output to the display screen and cloud database through the CAN bus processor to analyze harmonic losses and efficiency curves, predict power supply lifespan, and different second transmission interfaces contact the first transmission interface to achieve direct connection with BMS, energy storage PCS and other devices. It supports protocol parsing and data interaction without the need for an additional signal conversion module.

[0024] In summary, through the coordinated use of various structures, when the electrodes on the power supply come into contact with the conductive rod, the current can be transmitted via the guide wire and the charge / discharge controller. This allows the power supply to absorb energy as a load or to perform discharge tests, simulating the transient response of the power supply during rapid charging and discharging. The first contact can contact the second contact on each of the first pins, so that the current inverter can convert the current frequency and transmit it to the conversion lead board through the wire. After the first and second contacts come into contact and transmit the current, it is transmitted to the charge / discharge controller through the second pin, conductive connector, and load test board. This realizes the function of synchronous charging and discharging testing on the power supply, achieving extreme condition simulation and energy efficiency testing of bidirectional energy flow equipment. It not only facilitates quick switching of test states but also allows adjustment of the depth of the second pin inserted into the misalignment port, thereby adjusting the number of conductive connectors on each reinforced pin that come into contact with the second pin, increasing the total current carrying capacity, reducing the current load of a single conductive connector, and avoiding excessive circuit inductance caused by voltage fluctuations during testing. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of this invention, the accompanying drawings used in some embodiments of this invention will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this invention, and those skilled in the art can obtain other drawings based on these drawings. Furthermore, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this invention.

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 is a side view of the overall structure of the present invention.

[0028] Figure 3 is a schematic diagram of the current storage device, current inverter, nylon L-frame, electric push rod and conversion lead plate of the present invention installed together.

[0029] Figure 4 is a schematic diagram of the housing, charge / discharge controller, nylon base, controller and display screen of the present invention installed together.

[0030] Figure 5 is a cross-sectional view of Figure 4 of the present invention.

[0031] Figure 6 is a schematic diagram of the load test board, reinforcing pins and conductive connectors of the present invention installed together.

[0032] Figure 7 is a schematic diagram of the connecting plate, clamping plate, positioning spring and limiting block of the present invention installed together.

[0033] Figure 8 is an exploded view of Figure 3 of the present invention.

[0034] Figure 9 is a side view of the digital signal converter, micro motor and CAN bus processor of the present invention installed in the current memory.

[0035] Figure 10 is an internal cross-sectional view of the feeding frame of the present invention.

[0036] In the diagram: 1. Housing; 2. Load test board; 3. Reinforced pin; 4. Conductive connector; 5. Nylon base; 6. Current storage device; 7. Current inverter; 8. Nylon L-frame; 9. Nylon plate; 10. Nylon clip; 11. Conversion lead plate; 12. First contact; 13. First pin; 14. Second contact; 15. Second pin; 16. Electric push rod; 17. Return spring; 18. Misalignment port; 19. Controller; 20. Display screen; 21. Connecting plate; 22. Limiting block; 23. Clamping plate; 24. Conductive rod; 25. Positioning spring; 26. Guide line; 27. Charge / discharge controller; 28. Digital signal converter; 29. ​​First transmission interface; 30. Micro motor; 31. CAN bus processor; 32. Second transmission interface; 33. Feeding frame; 34. Polygonal rod; 35. Clamping plate; 36. Crossbar; 37. Electric push rod; 38. Through hole; 39. Servo motor. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] As shown in Figures 1-10, the modular composite bidirectional DC test power supply device, through the test components set on the housing 1, allows current to be transmitted via the guide wire 26 and the charge / discharge controller 27 when the electrodes on the power supply contact the conductive rod 24. This enables the power supply to absorb energy as a load or to perform discharge tests, simulating the transient response of the power supply during rapid charging and discharging. The first contact 12 can contact the second contact 14 on each of the first pins 13, so that the current inverter 7 can convert the current frequency and transmit it to the conversion lead plate 11 through the wire. After the first contact 12 and the second contact 14 contact each other, the current is transmitted to the first contact. The power supply is fed to the charge / discharge controller 27 via the second pin 15, conductive connector 4, and load test board 2, realizing the function of synchronous charging and discharging test on the power supply. It realizes the extreme working condition simulation and energy efficiency detection of bidirectional energy flow equipment. It is not only easy to quickly switch the test state, but also can adjust the depth of the second pin 15 inserted into the misalignment port 18, thereby adjusting the number of conductive connectors 4 on each reinforcing pin 3 that contact the second pin 15, increasing the total current carrying capacity, reducing the current load of a single conductive connector 4, and avoiding excessive circuit inductance caused by voltage fluctuations during the test. The specific structural settings of the components are as follows.

[0039] The test assembly includes a load test board 2 located at the bottom of the housing 1. Several reinforcing pins 3, all used for current transmission, are plugged into the load test board 2, and several conductive connectors 4 are fixedly installed on each reinforcing pin 3.

[0040] A nylon base 5 is provided on the top of the housing 1. A current storage device 6 is inserted into the top of the nylon base 5. A current inverter 7 is provided on the top of the current storage device 6. A nylon L-frame 8 is bolted to one side of the current inverter 7. A nylon plate 9 is rotatably connected to one end of the nylon L-frame 8. A nylon clip 10 is snapped onto the nylon plate 9. A conversion lead plate 11 is inserted into the nylon clip 10. The conversion lead plate 11 is connected to the current inverter 7 through wires. First contacts 12 are embedded on both sides of the bottom of the conversion lead plate 11. The current storage device 6 is provided with two first pins 13 that are both inductive to the conversion lead plate 11, and a second contact 14 is embedded on each first pin 13. Several second pins 15 are provided at the bottom of the current storage device 6. A digital signal converter 28 is embedded in the bottom of the inner cavity of device 6, and the digital signal converter 28 is welded to the second pin 15. The bottom of the inner wall of the digital signal converter 28 is bolted to a first transmission interface 29. A micro motor 30 is provided on one side of the inner wall of the current storage 6. The digital signal converter 28 is provided with the first transmission interface 29. The output end of the micro motor 30 is mounted with a CAN bus processor 31 through an electric slip ring. Several second transmission interfaces 32 are provided on the outside of the CAN bus processor 31. Several misalignment ports 18 are opened on the nylon base 5. Multiple reinforcing pins 3 are located in the corresponding nylon L frame 8. Multiple second pins 15 extend into the corresponding misalignment ports 18 and contact the conductive connector 4.

[0041] Both sides of the bottom of the housing 1 are bolted with connecting plates 21, and each connecting plate 21 is fixedly provided with a limit block 22. The outer sides of the two limit blocks 22 are slidably connected with a clamping plate 23. The two connecting plates 21 are arranged opposite each other, and one end of each clamping plate 23 is provided with a reduction slope. A conductive rod 24 is slidably connected to the clamping plate 23.

[0042] The current storage 6 is provided with two first pins 13 that are both inductive to the conversion lead plate 11, and each first pin 13 is embedded with a second contact 14. The bottom of the current storage 6 is provided with several second pins 15.

[0043] A feeding frame 33 is provided at the bottom of the connecting plate 21. A power transfer assembly is rotatably connected inside the feeding frame 33. A servo motor 39 for driving the power transfer assembly to rotate is provided at one end of the feeding frame 33. The power transfer assembly includes a polygonal rod 34, a clamping plate 35, a crossbar 36, and an electric push rod 37. The polygonal rod 34 is rotatably connected inside the feeding frame 33. Several clamping plates 35 are distributed on the outer side of the polygonal rod 34, and a feeding cavity is formed between each two adjacent clamping plates 35. A crossbar 36 is fixed to the inner wall of the feeding frame 33 in the middle of the polygonal rod 34. Two electric push rods 37 for pushing the material are provided on the crossbar 36. Several through holes 38 are opened on the outer side of the polygonal rod 34, which are respectively located in the corresponding feeding cavities. A servo motor 39 for driving the polygonal rod 34 to rotate is provided at one end of the feeding frame 33.

[0044] An electric push rod 16 is bolted to one side of the nylon L-frame 8. The output end of the electric push rod 16 extends to one side of the nylon plate 9. A return spring 17 is hooked at the top of the nylon L-frame 8. One end of the return spring 17 extends to the top of the nylon plate 9 and is hooked on the nylon plate 9. A controller 19 is provided at one end of the nylon seat 5. A display screen 20 for display is provided on the controller 19. The controller 19 is connected to the current memory 6 and the current frequency converter 7 through wires. One end of the conductive rod 24 passes through the card plate 23 and extends to the outside of the card plate 23. A positioning spring 25 is provided at the other end of the conductive rod 24. The positioning spring 25 is embedded in the card plate 23. A guide line 26 is welded to the end of the conductive rod 24 facing the limit block 22. A charge / discharge controller 27 is welded to the end of the guide line 26. The charge / discharge controller 27 is embedded in the end of the housing 1 and connected to the load test board 2 through wires.

[0045] According to the above structure, during use and testing, the power supply is placed in the feeding frame 33 and positioned by the loading chamber. The servo motor 39 drives the polygonal rod 34 to rotate. When the polygonal rod 34 rotates, it drives each clamping plate 35 to rotate along the axis of the polygonal rod 34. This allows the loading chamber containing the power supply to be transferred to the bottom of the housing 1. Then, the power supply is driven to move upward through the through hole 38 after the output end of the electric push rod 37. The clamping plate 23 and the conductive rod 24 are displaced by force. The conductive rod 24 is stored in the clamping plate 23, which compresses the positioning spring 25. The elasticity of the positioning spring 25 drives the conductive rod 24 and the clamping plate 23 to reset, so that the device can be installed on the power supply. At the same time, the conductive rod 24 can also abut against the electrodes of the power supply to conduct current. The reset clamping plate 23 is clamped on the outside of the power supply to position the power supply, preventing the power supply from falling off and causing disconnection, which would lead to inaccurate testing. In addition, the slope at the end of the clamping plate 23 reduces the friction between the clamping plate 23 and the power supply, making the installation and testing of the device smoother.

[0046] Furthermore, while the original power supply is being tested in the device, the staff can continue to place the power supply to be tested in the remaining clamping plates 35 and the loading chamber. After the original power supply has been tested, it is retracted by the output end of the electric push rod 37 and falls back into the loading chamber. The servo motor 39 then drives the polygonal rod 34 to rotate again, and the remaining power supplies are transferred to the device one by one for testing.

[0047] When the electrodes on the power supply come into contact with the conductive rod 24, the current can be transferred through the guide wire 26 and the charge / discharge controller 27, so that the power supply can absorb energy as a load or perform a discharge test, simulating the transient response of the power supply during rapid charging and discharging.

[0048] Furthermore, the second pin 15 is inserted into the misalignment port 18 and contacts the reinforcing pin 3 and the conductive connector 4. The nylon plate 9 is deflected at the end of the nylon L-frame 8 by the electric push rod 16, thereby changing the position of the nylon clip 10 and the conversion lead plate 11. This allows the first contact 12 to contact the second contact 14 on each of the first pins 13, so that the current frequency converter 7 can convert the current frequency and transmit it to the conversion lead plate 11 through the wire. After the first contact 12 and the second contact 14 contact each other and transmit the current, it is transmitted to the charge and discharge controller 27 through the second pin 15, the conductive connector 4 and the load test board 2, realizing the function of synchronous charging and discharging test on the power supply, and realizing the extreme working condition simulation and energy efficiency detection of the bidirectional energy flow equipment.

[0049] Furthermore, when the second pin 15 contacts the reinforcing pin 3, the current delivered by the second pin 15 is converted into digital information by the digital signal converter 28, and then transmitted to the second transmission interface 32 through the first transmission interface 29. The digital signal is then output to the display screen 20 and the cloud database through the CAN bus processor 31 to analyze harmonic losses and efficiency curves, and predict power supply lifespan, for example, by fitting an attenuation model using cyclic charge and discharge data. Different second transmission interfaces 32 contact the first transmission interface 29 to achieve direct connection to devices such as BMS and energy storage PCS, supporting protocol parsing and data interaction without the need for an additional signal conversion module.

[0050] By changing the displacement of the lead plate 11 to contact different first pins 13, the power supply can be switched between charging and discharging, making it easy to quickly switch test states. It can also adjust the depth of the second pin 15 inserted into the misalignment port 18, thereby adjusting the number of conductive connectors 4 on each reinforcing pin 3 that contact the second pin 15, increasing the total current carrying capacity, reducing the current load of a single conductive connector 4, and avoiding excessive circuit inductance caused by voltage fluctuations during testing.

[0051] Unlike existing technologies, this application discloses a modular composite bidirectional DC test power supply device. When the electrodes on the power supply come into contact with the conductive rod 24, the current can be transmitted via the guide wire 26 and the charge / discharge controller 27, allowing the power supply to absorb energy as a load or perform discharge tests, simulating the transient response of the power supply during rapid charging and discharging. The first contact 12 can contact the second contact 14 on each of the first pins 13, so that the current inverter 7 can convert the current frequency and transmit it to the conversion lead plate 11 through the wires. The current is transmitted to the first contact 12 and the second contact 14 through contact. After delivery, the signal is transmitted to the charge / discharge controller 27 via the second pin 15, conductive connector 4, and load test board 2, realizing the function of synchronous charging and discharging test on the power supply. This enables the simulation of extreme operating conditions and energy efficiency testing of bidirectional energy flow equipment. It not only facilitates quick switching of test states but also allows adjustment of the depth of the second pin 15 inserted into the misalignment port 18, thereby adjusting the number of conductive connectors 4 on each reinforcing pin 3 in contact with the second pin 15, increasing the total current carrying capacity, reducing the current load of a single conductive connector 4, and avoiding excessive circuit inductance caused by voltage fluctuations during testing.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular composite bidirectional DC test power supply device, comprising a housing (1), characterized in that: The housing (1) is provided with a test assembly; the test assembly includes a load test plate (2) set at the bottom of the housing (1), the load test plate (2) is connected with several reinforcing pins (3) for current transmission, and several conductive connectors (4) are fixedly set on each of the reinforcing pins (3); the bottom sides of the housing (1) are both bolted with connecting plates (21), and each connecting plate (21) is fixedly provided with a limit block (22), the outer sides of the two limit blocks (22) are slidably connected with a card plate (23), the two connecting plates (21) are arranged opposite to each other, and one end of each card plate (23) is provided with a reduction slope, the card plate (23) is slidably connected with a conductive rod (24), the conductive rod (24) is connected to a charge / discharge controller (27) through a guide line (26), and the charge / discharge controller (27) is connected to the load test plate (2) through a wire; the top of the housing (1) is provided with a nylon seat (5) and a current memory (6). The current storage device (6) is provided with a nylon clip (10), and a conversion lead plate (11) is inserted into the nylon clip (10). The conversion lead plate (11) is connected to the current inverter (7) through a wire. First contacts (12) are embedded on both sides of the bottom of the conversion lead plate (11). The current storage device (6) is provided with two first pins (13) corresponding to the positions of the conversion lead plate (11) and used to cooperate with the first contacts (12) for conduction. Each first pin (13) 13) Each of the above is embedded with a second contact (14) for contacting and communicating with the first contact (12). The bottom of the current memory (6) is provided with several second pins (15). The second pins (15) are in contact with the conductive connector (4) for communication. The bottom of the connecting plate (21) is provided with a feeding frame (33). The power transfer assembly is rotatably connected inside the feeding frame (33). One end of the feeding frame (33) is provided with a servo motor (39) for driving the power transfer assembly to rotate.

2. The modular composite bidirectional DC test power supply device as described in claim 1, characterized in that: The power transfer assembly includes a polygonal rod (34), a clamping plate (35), a crossbar (36), and an electric push rod (37). The polygonal rod (34) is rotatably connected inside the feeding frame (33). Several clamping plates (35) are distributed on the outer side of the polygonal rod (34), and a feeding cavity is formed between each two adjacent clamping plates (35). A crossbar (36) fixed to the inner wall of the feeding frame (33) is provided in the middle of the polygonal rod (34). An electric push rod (37) for pushing the material is provided on the crossbar (36). Several through holes (38) are opened on the outer side of the polygonal rod (34) respectively located in the corresponding feeding cavity. A servo motor (39) for driving the polygonal rod (34) to rotate is provided at one end of the feeding frame (33).

3. The modular composite bidirectional DC test power supply device as described in claim 1, characterized in that: The current storage device (6) is inserted into the top of the nylon base (5). A current inverter (7) is provided on the top of the current storage device (6). The conversion lead plate (11) is connected to the current inverter (7) through a wire. A nylon L-frame (8) is installed on one side of the current inverter (7) by bolts. A nylon plate (9) is rotatably connected to one end of the nylon L-frame (8). The nylon clip (10) is snapped onto the nylon plate (9).

4. The modular composite bidirectional DC test power supply device as described in claim 3, characterized in that: The nylon base (5) has several misaligned openings (18), and the multiple reinforcing pins (3) are respectively located in the corresponding nylon L-frames (8); a digital signal converter (28) is embedded in the bottom of the cavity of the current memory (6), and the digital signal converter (28) is welded together with the second pin (15). The bottom of the inner wall of the digital signal converter (28) is bolted to a first transmission interface (29). A micro motor (30) is provided on one side of the inner wall of the current memory (6). The digital signal converter (28) is provided with a first transmission interface (29). The output end of the micro motor (30) is mounted with a CAN bus processor (31) through an electric slip ring. Several second transmission interfaces (32) are provided on the outside of the CAN bus processor (31).

5. The modular composite bidirectional DC test power supply device as described in claim 4, characterized in that: Multiple second pins (15) extend into the corresponding misalignment ports (18) and come into contact with the conductive connectors (4).

6. The modular composite bidirectional DC test power supply device as described in claim 3, characterized in that: An electric push rod (16) is bolted to one side of the nylon L-frame (8), and the output end of the electric push rod (16) extends to one side of the nylon plate (9).

7. The modular composite bidirectional DC test power supply device as described in claim 3, characterized in that: A return spring (17) is hooked at the top of the nylon L-frame (8), one end of which extends to the top of the nylon plate (9) and is hooked on the nylon plate (9).

8. The modular composite bidirectional DC test power supply device as described in claim 3, characterized in that: A controller (19) is provided at one end of the nylon seat (5), and a display screen (20) for display is provided on the controller (19). The controller (19) is connected to the current memory (6) and the current inverter (7) through wires.

9. The modular composite bidirectional DC test power supply device as described in claim 1, characterized in that: One end of the conductive rod (24) passes through the card plate (23) and extends to the outside of the card plate (23). The other end of the conductive rod (24) is provided with a positioning spring (25), which is embedded in the card plate (23).

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