Weak current PDU (Protocol Data Unit) with self-adaptive interface

Abstract

The invention relates to the technical field of circuit devices for power supply or power distribution, in particular to a weak current PDU (Protocol Data Unit) with an adaptive interface. The contact pin is fixedly connected to one side of the lower part of the main module; the needle seat is fixedly connected to the other side of the lower part of the main module; the output interface is fixedly connected to the front side of the main module; and the indicating lamp is fixedly connected to the front side of the main module. Through modular installation design, flexible configuration of the number of output interfaces is realized, and the defects that a traditional PDU port is fixed and inconvenient to expand are overcome; the charging modules are electrically isolated, hot plug and independent replacement are supported, and waiting for the whole maintenance process or complete machine replacement is not needed when a local fault occurs, so that the applicability, the maintainability and the economical efficiency of the device are remarkably improved; and meanwhile, multiple circuit protection and state indication functions are built in, so that tidy, intelligent and flexible management on low-voltage charging requirements of the machine room is realized on the basis of ensuring power utilization safety.

Description

Technical Field

[0001] This invention relates to the field of circuit devices for power supply or distribution, and more particularly to a low-voltage PDU with an adaptive interface. Background Technology

[0002] A Power Distribution Unit (PDU) is a basic power distribution device widely used in data centers, communication equipment rooms, and industrial control cabinets. Its function is to safely and reliably distribute input power to multiple devices, such as servers, switches, and storage devices. Traditional PDUs typically use AC high-voltage input and supply power to devices through a fixed number and type of output sockets.

[0003] However, with the diversification of information technology equipment and the increasing complexity of power consumption scenarios, traditional PDUs are gradually showing the following limitations: First, the number and type of output ports of existing PDUs are fixed at the factory and cannot be flexibly added or removed according to actual power demand. If the number of devices on site exceeds the number of original sockets of the PDU, new PDUs need to be added or replaced with models with higher port density, resulting in equipment redundancy, messy wiring and wasted rack space. Conversely, if too many ports are idle, it will also lead to low resource utilization.

[0004] Secondly, the internal circuitry of traditional PDUs is often arranged as a whole, with tight electrical connections between the output ports. When any port or internal module fails, it often affects the normal operation of the whole system. During maintenance, the entire unit must be disassembled and sent for repair, during which all ports are unusable, resulting in long system downtime and reduced availability. If the entire unit is replaced, maintenance costs and electronic waste will be further increased, resulting in poor economic benefits. Summary of the Invention

[0005] To address the shortcomings of existing technologies mentioned in the background section, this invention provides a low-voltage PDU with an adaptive interface that is modular, scalable, and easy to maintain. This allows for flexible configuration of the output interface according to power requirements and enables rapid replacement and isolation in the event of a partial fault, thereby improving the adaptability, reliability, and overall lifecycle economy of the structure.

[0006] The technical implementation scheme of the present invention is as follows: a low-voltage PDU with an adaptive interface, comprising: a mounting compartment; a mounting frame disposed at the front of the mounting compartment, wherein one of the left and right sides of the mounting frame is provided with a detachable side plate, and the front and rear directions are open, with a frame edge at the front opening; a mounting rail fixedly connected to the upper and lower sides of the inner wall of the mounting frame and extending in the left and right directions; a power supply and communication interface fixedly connected to the other side of the mounting frame, wherein a TTL level serial communication interface for external data communication is provided thereon; and a charging module slidably connected to the mounting frame through the mounting rail, the number of which can be configured according to actual usage requirements, wherein the charging module located on the far side is directly connected to the power supply and communication interface; Each charging module includes: a main module; pins, fixedly connected to one side of the lower part of the main module and electrically connected to the main module; pin sockets, fixedly connected to the other side of the lower part of the main module and electrically connected to the main module, and the pins connect to the pin sockets of adjacent main modules to realize power supply and communication series between the main modules; an output interface, fixedly connected to the front side of the main module and electrically connected to the main module, used to connect the device to be charged; a limiting strip, fixedly connected to the upper and lower sides of the main module, which cooperates with the mounting rail, and its cross-section is approximately circular to match the cross-section of the mounting rail, which can limit the displacement of the main module in the front-back and vertical directions; and an indicator light, fixedly connected to the front side of the main module and electrically connected to the main module, used to indicate the charging status of the main module.

[0007] More preferably, the main module integrates a step-down circuit; the main module has an independent current detection circuit, intelligent switch circuit and thermistor for each output interface. The current detection circuit is used to monitor the output current, the thermistor is arranged in the power component area to detect the temperature of the main module, and the intelligent switch circuit controls the power supply of the output interface; the power supply communication interface circuit integrates a voltage monitoring circuit and a total current monitoring circuit to control the on and off of the bus power supply.

[0008] More preferably, the device further includes: insert plates, which are fixedly connected to the rear side of the mounting frame and symmetrically arranged along the outline of the mounting frame; the front side of the mounting compartment is provided with slots that match the positions of each insert plate; and the connection position between the slot and the insert plate is provided with mounting holes for installing fixing screws.

[0009] More preferably, the device further includes: a protective plate, which is slidably disposed on the frame edge at the front side of the mounting frame to provide external protection for the charging module. The plate has slots corresponding to the output interface and indicator light positions of each charging module, with only the aforementioned functional components exposed to the outside, and the output interface and indicator light are shaped to match the corresponding slots.

[0010] More preferably, the device further includes: a control unit, located between the frame edge and the protective plate, for controlling the forward and backward movement of the protective plate to attach or detach the charging module; at least two control units are provided, symmetrically arranged on the protective plate. Each control unit includes: a long slotted block, fixedly connected to the protective plate, which has a long strip-shaped mounting slot extending in the left-right direction; a mounting block, fixedly connected to the frame edge, which has a rotating shaft; a handle, rotatably connected to the mounting block via the rotating shaft; a limiting shaft, fixedly connected to the handle, which passes through the long slot of the long slotted block; a locking groove is opened on the rear side of the handle; a locking strip, fixedly connected to the frame edge, which engages with the locking groove, and the locking strip can elastically deform under force; a slider, slidably connected inside the handle, which can contact the locking strip, and the contact surface with the locking strip is set as an inclined surface; and a first spring, fixedly connected between the slider and the handle, for the reset of the slider.

[0011] More preferably, a ball groove is provided within the mounting frame corresponding to the standard mounting position of each charging module; the device also includes: a positioning unit, disposed on each charging module, for cooperating with the ball groove; Each positioning unit includes: a fixed frame, which is fixedly connected to the upper and lower sides of the main module; a ball, which is slidably connected to the front and rear sides of each fixed frame and whose shape matches the ball groove; and a second spring, which is fixedly connected between the ball and the fixed frame and is used to press the ball into the ball groove.

[0012] More preferably, the device further includes: an unlocking block, which is slidably connected to the fixed frame; and a pull bar, which is fixedly connected to each locking ball, and has a contact part for contacting the unlocking block, wherein the contact surface between the unlocking block and the pull bar is an inclined surface.

[0013] More preferably, the device further includes: a compensation unit disposed in each needle holder, used to assist in the stable docking of the needle with the needle holder; The compensation unit includes: a limiting block, which is slidably connected to the upper and lower sides of each needle hole in the needle holder and is electrically connected to the needle holder; and a third spring, which is fixedly connected between the limiting block and the inner wall of the needle holder and provides elastic pressure to the limiting block toward the center of the needle hole.

[0014] Compared with existing technologies, the present invention has the following advantages: Through modular installation design, the present invention enables flexible configuration of the number of output interfaces, overcoming the shortcomings of fixed ports and inconvenient expansion of traditional PDUs; electrical isolation between charging modules supports hot-swapping and independent replacement, eliminating the need to wait for the entire repair process or complete machine replacement in case of partial failure, thereby significantly improving the applicability, maintainability and economy of the present invention; at the same time, it has built-in multiple circuit protection and status indication functions, ensuring power safety while realizing clean, intelligent and flexible management of low-voltage charging needs in the computer room.

[0015] The present invention significantly improves the detachability and maintenance convenience of the invention through the detachable connection design between the mounting frame and the mounting compartment, making the management of the charging module more flexible and efficient.

[0016] This invention features a protective plate that is tightly fitted to the front of the charging module, effectively preventing dust, foreign object intrusion, and physical collisions. A control component enables rapid unlocking and displacement control of the protective plate, significantly improving the efficiency of maintenance and configuration adjustments. Furthermore, the slot and locking mechanism in the control unit ensures the protective plate remains firmly attached during operation, preventing displacement due to vibration or accidental contact, thus guaranteeing the long-term reliable operation of the output interfaces and indicator lights. The protective plate, with precisely cut slots, exposes only the necessary output interfaces and indicator lights, maintaining the cleanliness and functional visibility of the front of the invention while providing physical protection, meeting the management requirements of a computer room environment for a neat appearance and visible status.

[0017] This invention prevents damage to the pins and pin holders due to over-insertion by using a positioning component, while providing clear feedback to the user to ensure proper positioning, thus improving operational awareness and convenience; and adds an unlocking block to simplify the operation steps when installing multiple charging modules, thereby improving the assembly efficiency and user experience of this invention.

[0018] This invention compensates for the gaps caused by wear of the pins within a certain range through a compensation unit, maintaining the stability and reliability of electrical contact, thereby extending the service life of the interface and ensuring the continuous and stable power supply and communication connection between charging modules. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a partial cross-sectional view of the internal connection structure of the present invention.

[0021] Figure 3 This is a separate diagram of the connection structure of the mounting compartment, mounting frame, and protective plate in this invention.

[0022] Figure 4 This is a separate diagram of the connection structure between the mounting frame and the charging module in this invention.

[0023] Figure 5 This is a schematic diagram of the connection structure of the two charging modules in the docking state in this invention.

[0024] Figure 6 This is a schematic diagram showing the position and structure of the protective plate and the control unit in this invention.

[0025] Figure 7 This is a schematic diagram of the connection structure for controlling the forward movement of the protective plate by the control unit in this invention.

[0026] Figure 8 This is a diagram showing the connection structure of the control unit in this invention.

[0027] Figure 9 This is a schematic diagram showing the positional structure of the charging module, positioning unit, and unlocking block in this invention.

[0028] Figure 10 This is a cross-sectional view of the connection structure between the positioning unit and the unlocking block in this invention.

[0029] Figure 11 This is a cross-sectional view of the connection structure of the compensation unit in this invention.

[0030] The above-mentioned drawings include the following reference numerals: 101, mounting compartment; 102, mounting frame; 1021, side plate; 1022, frame edge; 103, mounting rail; 104, protective plate; 1041, slot; 105, insert plate; 106, slot; 107, mounting hole; 201, power supply and communication interface; 202, main module; 203, pin; 204, pin seat; 205, output interface; 206, limiting strip; 207, indicator light; 301, long slot block; 302, mounting block; 303, handle; 304, limiting shaft; 305, slot; 306, locking strip; 307, slider; 308, first spring; 401, fixed frame; 402, locking ball; 403, second spring; 404, ball groove; 405, unlocking block; 406, pull bar; 501, limiting block; 502, third spring. Detailed Implementation

[0031] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0032] Example: A low-voltage PDU with an adaptive interface, see reference. Figures 1-3 The device includes: a mounting compartment 101, which is powered by a 24V DC power supply; a mounting frame 102, which is mounted on the front of the mounting compartment 101, with a detachable side plate 1021 on the left side; the mounting frame 102 has an open design in the front and back directions, with a frame edge 1022 at the front opening; a mounting rail 103, which is fixedly installed on the upper and lower sides of the inner wall of the mounting frame 102 and extends in the left and right directions; a power supply and communication interface 201, which is fixedly installed on the right side of the mounting frame 102 and has a TTL level serial communication interface for external data communication; and a charging module, which is slidably installed in the mounting frame 102 via the mounting rail 103. The number of modules can be flexibly configured according to actual usage requirements. The charging module located on the far right is directly connected to the power supply and communication interface 201.

[0033] See Figures 1-5Each charging module includes: a main module 202; pins 203, fixedly installed on the lower right side of the main module 202 and electrically connected to the main module 202; pin headers 204, fixedly installed on the lower left side of the main module 202 and electrically connected to the main module 202, wherein each pin 203 is plugged into the pin header 204 of the adjacent main module 202 to realize the series connection of power supply and communication between the main modules 202; and an output interface 205, fixedly installed on the front side of the main module 202 and electrically connected to the main module 202, providing USB... Both Type-A and Type-C interfaces are used to connect the device to be charged; the limiting strip 206 is fixedly installed on the upper and lower sides of the main module 202 and cooperates with the mounting rail 103. Its cross-section is approximately circular and matches the cross-section of the mounting rail 103. It can limit the displacement of the main module 202 in the front-back and vertical directions, thereby ensuring its stable positioning within the mounting frame 102; the indicator light 207 is fixedly installed on the front side of the main module 202 and electrically connected to the main module 202 to indicate the charging status of the main module 202.

[0034] The main module 202 integrates a step-down circuit, which can convert the input 24V DC power supply into a voltage suitable for charging various electronic devices. The maximum output power of a single port is 65W. It can directly charge devices such as laptops and mobile phones without the need for an external power adapter, and supports multiple mainstream fast charging protocols to achieve efficient charging.

[0035] In addition, the main module 202 is equipped with an independent current detection circuit, intelligent switch circuit and thermistor for each output interface 205. The current detection circuit monitors the output current in real time, and the thermistor is arranged in the power component area to detect the temperature of the main module 202. When any output interface 205 experiences overcurrent, short circuit or overall overheating, the intelligent switch circuit will immediately cut off the power supply to that output interface 205 to achieve fault isolation without affecting the normal operation of its charging module.

[0036] The power supply and communication interface 201 integrates a voltage monitoring circuit and a total current monitoring circuit. When an input overvoltage, undervoltage, or system overcurrent is detected, the bus power supply can be quickly cut off to ensure the safety of the device.

[0037] Using this device, the user installs the appropriate number of charging modules along the mounting rail 103 into the mounting frame 102 according to actual needs. These modules are then connected in series via pins 203 and pin sockets 204. Finally, the rightmost charging module is connected to the power supply and communication interface 201 to complete the assembly and power supply of the device. Each charging module will operate independently. Indicator lights 207 will display the status of the charging modules: red indicates charging, green indicates standby, and no light indicates a fault.

[0038] When it is necessary to monitor or debug the charging module, the user can connect the debugging tool through the power supply communication interface 201 to read the charging status, voltage, current and channel number information of the output interface 205 on each charging module in real time.

[0039] This equipment features a modular installation design, enabling flexible configuration of up to 205 output interfaces. This overcomes the shortcomings of traditional PDUs, which have fixed ports and are difficult to expand. The charging modules are electrically isolated, supporting hot-swapping and independent replacement. In the event of a partial failure, there is no need to wait for the entire repair process or replace the entire unit, thus significantly improving the applicability, maintainability, and economy of this equipment. At the same time, it has built-in multiple circuit protection and status indication functions, ensuring electrical safety while achieving clean, intelligent, and flexible management of the low-voltage charging needs of the computer room.

[0040] See Figure 3 The device also includes: a plug plate 105, which is fixedly installed on the rear side of the mounting frame 102 and symmetrically arranged along the outline of the mounting frame 102; a slot 106 corresponding to the position of each plug plate 105 is provided on the front side of the mounting compartment 101; a mounting hole 107 is provided at the joint position between the slot 106 and the plug plate 105, so that the mounting frame 102 and the mounting compartment 101 can be firmly connected by mounting screws, thereby realizing the quick assembly and fixation of the two.

[0041] By removing the fixing screws, the entire mounting frame 102 can be removed from the mounting compartment 101, facilitating the installation, replacement, or maintenance of the charging module inside the mounting frame 102. This design significantly improves the disassembly and maintenance convenience of the device, making the management of the charging module more flexible and efficient.

[0042] See Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8 The device also includes: a protective plate 104, which is slidably disposed on the frame edge 1022 at the front side of the mounting frame 102 to provide external protection for the charging module. Slots 1041 are provided at the positions of the output interface 205 and indicator light 207 of each charging module to ensure that only the above-mentioned functional components are exposed to the outside for easy use. The output interface 205 and indicator light 207 are shaped to fit the corresponding slots 1041 to avoid them being recessed behind the protective plate 104, which would cause inconvenience in plugging and unplugging or difficulty in observation. A control unit is disposed between the frame edge 1022 and the protective plate 104 to control the forward and backward movement of the protective plate 104 to achieve its contact or separation with the charging module, which facilitates the subsequent disassembly and assembly of the charging module. There are four sets of control units, which are located at the four corners of the protective plate 104. Each control unit includes: a long slotted block 301, fixedly mounted on the protective plate 104, which has a long strip-shaped mounting slot extending in the left-right direction; a mounting block 302, fixedly mounted on the frame edge 1022, which has a rotating shaft; a handle 303, rotatably mounted on the mounting block 302 via the rotating shaft; and a limiting shaft 304, fixedly mounted on the handle 303, passing through the long slot of the long slotted block 301, for moving the protective plate 104 back and forth when the handle 303 is rotated; and a rear side of the handle 303 is provided with... There is a slot 305; a locking strip 306, which is fixedly installed on the frame edge 1022 and engages with the slot 305 to lock the position of the handle 303. The locking strip 306 can undergo elastic deformation when subjected to force; a slider 307, which is slidably installed in the handle 303 and can contact the locking strip 306. The contact surface with the locking strip 306 is set as an inclined surface so as to use displacement to squeeze and deform the locking strip 306; and a first spring 308, which is fixedly installed between the slider 307 and the handle 303 for resetting the slider 307.

[0043] Before disassembling or assembling the charging module, the control unit must be operated to move the protective plate 104 forward. The specific steps are as follows: The slider 307 is pushed to slide inward along the handle 303 against the elastic force of the first spring 308. During this process, the upper inclined surface of the slider 307 presses against the retaining strip 306, causing the retaining strip 306 to deform and disengage from the retaining groove 305. At this time, the handle 303 can be controlled to rotate forward around the pivot on the mounting block 302, driving the limiting shaft 304 to make a circular motion. This motion is converted into the forward displacement of the protective plate 104 under the guidance of the long slot block 301, realizing the separation control of the protective plate 104 from the charging module. After this, the charging module can be disassembled and assembled. The slider 307 is automatically reset by the first spring 308 after being released. After the charging module is installed or replaced, rotate the handle 303 in the reverse direction to move the protective plate 104 backward until its slot 1041 is re-fitted with the output interface 205 and indicator light 207 of each charging module. As the handle 303 is rotated, the slot 305 and the strip 306 engage to lock the position of the handle 303, thereby fixing the protective plate 104.

[0044] This device is installed tightly against the front of the charging module via a protective plate 104, effectively preventing dust, foreign object intrusion, and physical collisions. The control components enable rapid unlocking and displacement control of the protective plate 104, significantly improving the efficiency of maintenance and configuration adjustments. Furthermore, the locking mechanism of the slot 305 and strip 306 in the control unit ensures that the protective plate 104 remains firmly attached during operation, preventing displacement due to vibration or accidental contact, thus guaranteeing the long-term reliable operation of the output interface 205 and indicator light 207. The protective plate 104, with precisely cut slots 1041, exposes only the necessary output interface 205 and indicator light 207, maintaining the cleanliness and functional visibility of the device's front while providing physical protection, meeting the management requirements of a computer room environment for a neat appearance and visible status.

[0045] See Figure 2 , Figure 4 , Figure 9 and Figure 10 The mounting frame 102 is provided with ball grooves 404 corresponding to the standard installation positions of each charging module; the device also includes: a positioning unit, which is provided on each charging module and is used to cooperate with the ball grooves 404 to realize the rapid and accurate positioning of the charging module in the mounting frame 102. Each positioning unit includes: a fixed frame 401, which is fixedly installed on the upper and lower sides of the main module 202; a ball 402, which is slidably installed on the front and rear sides of each fixed frame 401, and whose shape matches the ball groove 404; and a second spring 403, which is fixedly installed between the ball 402 and the fixed frame 401, for pressing the ball 402 into the ball groove 404.

[0046] See Figure 9 and Figure 10 The device also includes: an unlocking block 405, which is slidably installed in the fixed frame 401; and a pull bar 406, which is fixedly installed on each ball 402, and has a contact part for contacting the unlocking block 405. The contact surface between the unlocking block 405 and the pull bar 406 is inclined so that the pull bar 406 is displaced by displacement, thereby removing the ball 402 from the ball groove 404.

[0047] During the installation of the charging module, when the charging module moves to the point where its retaining ball 402 aligns with the ball groove 404 on the mounting frame 102, the second spring 403 will automatically push the retaining ball 402 into the ball groove 404, thereby completing the positioning of the charging module. This design prevents damage to the pins 203 and pin holders 204 due to over-insertion, while providing clear feedback to the user, improving operational awareness and convenience. If the charging module has not yet reached the predetermined position, the user can continue to push the charging module, and the edge of the ball groove 404 will squeeze the retaining ball 402 to retract it, allowing the charging module to continue moving until it reaches the next ball groove 404.

[0048] To optimize the operation process, when the user operates the mobile charging module through the open rear of the removed mounting frame 102, they should simultaneously press the unlocking block 405. The upper inclined surface of the unlocking block presses against the retaining ball 402, keeping it in a retracted state and preventing it from repeatedly engaging with the ball grooves 404 along the path during movement. When the charging module is visually approaching the target installation position, the unlocking block 405 is released, and the retaining ball 402 will automatically engage with the corresponding ball groove 404 during subsequent movement. This design further simplifies the operation steps when installing multiple charging modules, improving the assembly efficiency and user experience of the equipment.

[0049] See Figure 11 The device also includes a compensation unit, which is located in each pin holder 204, and is used to assist the pin 203 and the pin holder 204 in achieving stable docking during the insertion process; The compensation unit includes: a limiting block 501, which is slidably installed on the upper and lower sides of each needle hole in the needle holder 204 and is electrically connected to the needle holder 204; and a third spring 502, which is fixedly installed between the limiting block 501 and the inner wall of the needle holder 204 and provides elastic pressure to the center of the needle hole for the limiting block 501.

[0050] With repeated insertion and removal of the charging module, wear may cause unstable connection between the pin 203 and the pinhole. This device addresses this by incorporating a compensation unit within the pin holder 204, using a third spring 502 to push the limiting block 501 to continuously adhere to the pin 203, forming an adaptive clamping structure. This design can compensate for gaps caused by wear within a certain range, maintaining the stability and reliability of electrical contact, thereby extending the interface's lifespan and ensuring the continuous stability of power supply and communication connections between charging modules.

[0051] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. An adaptive interface low-voltage PDU, characterized by, The device comprises: a mounting bin (101); a mounting frame (102) arranged on the front side of the mounting bin (101), one side of the mounting frame (102) is provided with a detachable side plate (1021), the front and rear directions are designed as an open structure, and a frame edge (1022) is arranged on the front opening; a mounting rail (103) fixedly connected to the inner wall of the mounting frame (102) and extending along the left and right directions; a power supply and communication interface (201) fixedly connected to the other side of the mounting frame (102), and provided with a TTL level serial communication interface for external data communication; and a charging module connected to the mounting frame (102) through the mounting rail (103), the number of which can be configured according to actual use requirements, wherein the charging module located at the most side is directly connected with the power supply and communication interface (201); each charging module comprises: a main module (202); a pin (203) fixedly connected to one side of the lower part of the main module (202) and electrically connected with the main module (202); a pin seat (204) fixedly connected to the other side of the lower part of the main module (202) and electrically connected with the main module (202), the pins (203) are inserted into the pin seats (204) of the adjacent main modules (202) to realize the power supply and communication series connection between the main modules (202); an output interface (205) fixedly connected to the front side of the main module (202) and electrically connected with the main module (202), used for connecting the equipment to be charged; a limiting strip (206) fixedly connected to the upper and lower sides of the main module (202) and matched with the mounting rail (103), the cross section of the limiting strip (206) is approximately circular and matched with the cross section of the mounting rail (103), so that the displacement of the main module (202) in the front and rear and up and down directions can be limited; and an indicator light (207) fixedly connected to the front side of the main module (202) and electrically connected with the main module (202), used for indicating the charging state of the main module (202).

2. An adaptive interface low voltage PDU as claimed in claim 1, characterized in that, The main module (202) is internally integrated with a voltage reduction circuit; the main module (202) is provided with an independent current detection circuit, an intelligent switch circuit and a thermistor for each output interface (205), the current detection circuit is used for monitoring the output current, the thermistor is arranged in the power component area to detect the temperature of the main module (202), and the intelligent switch circuit controls the power supply of the output interface (205); the circuit of the power supply and communication interface (201) is integrated with a voltage monitoring circuit and a total current monitoring circuit, used for controlling the on-off of the bus power supply.

3. An adaptive interface low voltage PDU as claimed in claim 2, characterized in that, The device further comprises: a plugboard (105) fixedly connected to the rear side of the mounting frame (102) and symmetrically arranged along the contour line of the mounting frame (102); the front side of the mounting bin (101) is correspondingly provided with a plug slot (106) matched with the position of each plugboard (105); and the joint position between the plug slot (106) and the plugboard (105) is provided with a mounting hole (107) for mounting a fixing screw.

4. An adaptive interface low voltage PDU as claimed in claim 3, characterized in that, The device further comprises a protection plate (104) slidingly arranged at the frame edge (1022) of the front side of the mounting frame (102) to provide external protection for the charging modules, and slot holes (1041) are respectively arranged at positions corresponding to the output interfaces (205) and indicator lights (207) of each charging module, only the above functional components are exposed outward, and the output interfaces (205) and the indicator lights (207) are shaped in correspondence with the slot holes (1041).

5. An adaptive interface low voltage PDU as claimed in claim 4, characterized in that, The device further comprises a control unit arranged between the frame edge (1022) and the protection plate (104) to control the protection plate (104) to move forward and backward to attach or separate the charging modules, and the control unit is provided with at least two groups symmetrically arranged on the protection plate (104); Each group of control units comprises a long slot block (301) fixedly connected to the protection plate (104) and provided with an elongated mounting slot extending in the left-right direction, a mounting block (302) fixedly connected to the frame edge (1022) and provided with a rotating shaft, a handle (303) rotatably connected to the mounting block (302) through the rotating shaft, a limiting shaft (304) fixedly connected to the handle (303) and penetrating the long slot of the long slot block (301), a clamping groove (305) arranged at the rear side of the handle (303), a clamping strip (306) fixedly connected to the frame edge (1022) and clamped in cooperation with the clamping groove (305), the clamping strip (306) being elastically deformable when subjected to stress, a sliding block (307) slidingly connected to the handle (303) and capable of contacting the clamping strip (306), and a first spring (308) fixedly connected between the sliding block (307) and the handle (303) to reset the sliding block (307).

6. An adaptive interface low voltage PDU as claimed in claim 5, characterized in that, Ball grooves (404) corresponding to standard mounting positions of the charging modules are arranged in the mounting frame (102); the device further comprises a positioning unit arranged on each charging module to cooperate with the ball grooves (404). Each positioning unit comprises a fixed frame (401) fixedly connected to the upper and lower sides of the main module (202), a clamping ball (402) slidingly connected to the front and rear sides of each fixed frame (401) and shaped in correspondence with the ball grooves (404), and a second spring (403) fixedly connected between the clamping ball (402) and the fixed frame (401) to press the clamping ball (402) into the ball groove (404).

7. An adaptive interface low voltage PDU as claimed in claim 6, characterized in that, The device further comprises an unlocking block (405) slidingly connected in the fixed frame (401) and a pull strip (406) fixedly connected to each clamping ball (402) and provided with a contact portion to contact the unlocking block (405), and the contact surface of the contact portion of the unlocking block (405) and the pull strip (406) is an inclined surface.

8. An adaptive interface low voltage PDU as claimed in claim 7, characterized in that, The device further comprises a compensation unit arranged in each needle seat (204) to assist the stable butt joint of the insertion needle (203) and the needle seat (204). The compensation unit comprises a limiting block (501) slidably connected to the upper and lower sides of each needle hole in the needle seat (204) and electrically connected to the needle seat (204), and a third spring (502) fixedly connected between the limiting block (501) and the inner wall of the needle seat (204) to provide the limiting block (501) with elastic pressure towards the center of the needle hole.

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