A kind of wire duct installation type AGV trolley charging power distribution device and power distribution system

Abstract

This application provides a cable tray-mounted AGV (Automated Guided Vehicle) charging and power distribution device and system, relating to the field of power distribution technology. The device includes a housing, a switch control module, a busbar, a current input connector, a current output connector, and a charging output connector. The outer dimensions of the housing match the inner dimensions of the cable tray. The switch control module and the busbar are both housed inside the housing. The current input and current output connectors are located at opposite ends of the housing, while the charging output connector is located on the side of the housing. The current input and current output connectors connect to an external power source and, together with the busbar, form the main power distribution circuit. The charging output connector interfaces with the AGV and transmits the enable signal sent by the AGV to the switch control module. The switch control module controls the on / off state of the charging circuit based on the enable signal. This application simplifies the AGV charging and power distribution architecture, saving cables, costs, and installation space.

Description

Technical Field

[0001] This application relates to the field of power distribution technology, and more specifically, to a cable tray-mounted AGV trolley charging power distribution device and power distribution system. Background Technology

[0002] Currently, the typical architecture of a warehouse AGV (Automated Guided Vehicle) charger power distribution system is as follows: An AC busbar from the power distribution room is laid through cable trays on the warehouse roof to a distribution box on the wall. Multiple cables then branch off from the distribution box and connect to the AGV charging power distribution devices located at various charging points, finally interfacing with the charger. In this scheme, both the distribution box and the AGV charging power distribution devices are independently installed on the wall, occupying limited warehouse space. Furthermore, long-distance, multi-path cables need to be laid from the power distribution room to the distribution box and then to each charging power distribution device, resulting in a large amount of cable usage and high laying costs.

[0003] Therefore, how to simplify the AGV charging and power distribution architecture to save on cables, costs, and installation space is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide a cable tray-mounted AGV charging and power distribution device and system to simplify the AGV charging and power distribution architecture and save cables, costs and installation space.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: On the one hand, this application provides a trough-mounted AGV trolley charging and power distribution device, including: a housing, a switch control module, a busbar conductor, a current input connector, a current output connector, and at least one charging output connector; The outer dimensions of the housing match the inner dimensions of the cable trough. The switch control module and the busbar are both located inside the housing. The current input connector and the current output connector are located at both ends of the housing, and the charging output connector is located on the side of the housing. The current input connector is connected to the current output connector through the busbar, and the switch control module is connected to both the busbar and the charging output connector. The current input connector and the current output connector are used to connect to an external power source and together with the busbar conductors, form the main power distribution circuit. The charging output connector is used to connect to the AGV trolley and transmit the enable signal sent by the AGV trolley to the switch control module; The switch control module is used to control the on / off state of the charging circuit according to the enable signal.

[0006] Furthermore, the switch control module includes at least one switch control unit, and the switch control unit includes a solid-state relay; The anode of the LED of the solid-state relay is connected to the charging output connector, the cathode of the LED of the solid-state relay is connected to the busbar, the first terminal of the SCR of the solid-state relay is connected to the busbar, and the second terminal of the SCR of the solid-state relay is connected to the charging output connector.

[0007] Furthermore, both the current input connector and the current output connector include a three-phase AC bus interface, a DC positive bus interface, a DC negative bus interface, and a ground interface; the busbar includes a three-phase AC bus cable, a DC positive bus cable, a DC negative bus cable, and a ground cable; each interface of the current input connector is connected to each interface of the current output connector through a corresponding cable in the busbar. The solid-state relay internally includes a light-emitting diode (LED) and three thyristors (SCRs). The charging output connector includes a DC positive control interface, a DC negative control interface, a ground interface, and three output interfaces. The DC positive and DC negative control interfaces of the charging output connector are respectively connected to the DC positive bus cable and the anode of the LED in the solid-state relay, and the cathode of the LED is connected to the DC negative bus cable. The three output interfaces of the charging output connector are respectively connected to the second terminals of the three SCRs in the solid-state relay, and the first terminals of the three SCRs are respectively connected to the corresponding three-phase AC bus cables. The ground interface of the charging output connector is connected to the ground cable.

[0008] Furthermore, when the AGV is successfully docked with the charging output connector and needs to be charged, the AGV sends a charging enable signal to the solid-state relay through the charging output connector. The LED inside the solid-state relay is energized and conducts, triggering the thyristor inside the solid-state relay to conduct. The power from the main power distribution circuit is then transmitted to the charging output connector via the thyristor to charge the AGV.

[0009] Furthermore, when the AGV completes charging, the AGV sends a power-off enable signal to the solid-state relay through the charging output connector. The light-emitting diode inside the solid-state relay is de-energized and cut off, and the thyristor inside the solid-state relay is turned off, thereby cutting off the power supply to the main power distribution circuit and ending the charging process.

[0010] Furthermore, the switch control unit also includes a first temperature control switch, a cooling fan, and a radiator; the radiator is located near the cooling fan, and the cooling fan is connected to the busbar via the first temperature control switch; When the temperature of the AGV charging and power distribution device installed in the cable tray exceeds the first preset temperature threshold, the first temperature control switch closes and the cooling fan starts to run so that air flows over the surface of the radiator to cool it down.

[0011] Furthermore, the switch control unit also includes a second temperature control switch; the anode of the light-emitting diode of the solid-state relay is connected to the charging output connector through the second temperature control switch; During the charging process, when the temperature of the grooved AGV charging power distribution device exceeds the second preset temperature threshold, the second temperature control switch is opened to stop the charging output until the temperature drops to the third preset temperature threshold, at which point the second temperature control switch is closed. Wherein, the first preset temperature threshold is less than the third preset temperature threshold and the second preset temperature threshold.

[0012] Furthermore, the switch control unit also includes a fuse; the first terminal of the thyristor of the solid-state relay is connected to the busbar through the fuse; The fuse is used to disconnect the electrical connection between the main power distribution circuit and the charging circuit when a short circuit fault occurs in the charging circuit or the load.

[0013] Furthermore, the current input connector and the current output connector adopt a male-female plug-in structure to realize the series connection between multiple AGV trolley charging and power distribution devices installed in the cable tray.

[0014] On the other hand, this application also provides a power distribution system, which includes a cable tray-mounted AGV trolley charging power distribution device as described in any of the foregoing embodiments.

[0015] Compared with the prior art, this application has the following advantages: The cable tray-mounted AGV charging and power distribution device provided in this application includes: a housing, a switch control module, a busbar, a current input connector, a current output connector, and at least one charging output connector. The housing's external dimensions match the internal dimensions of the cable tray, allowing it to be directly embedded in the existing cable tray on the warehouse roof, replacing the separately installed wall-mounted distribution box and charging and power distribution device in existing solutions, effectively saving installation space. The switch control module and busbar are both located inside the housing. The current input connector and current output connector are located at opposite ends of the housing, and the charging output connector is located on the side of the housing. The current input connector is connected to the current output connector via the busbar, and the switch control module is connected to both the busbar and the charging output connector. This application integrates the busbar inside the device and connects it to the current input and current output connectors at both ends of the device to form a main power distribution circuit, allowing the power supply busbar to be directly laid along the roof cable tray and connected to the device. Meanwhile, by integrating a switch control module inside the device, the charging circuit can be directly controlled to open or close based on the enable signal sent by the AGV. Compared with the existing solution that requires long-distance multi-branch cables to be led from the wall distribution box to each charging point and an independent switch box to be configured, this application simplifies the AGV charging power distribution architecture, which not only saves installation space, but also reduces the amount of cables used and the cost, and improves the convenience of device installation and maintenance. Attached Figure Description

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0017] Figure 1 A top view of the structure of a trough-mounted AGV trolley charging and power distribution device provided in an embodiment of this application; Figure 2 This is one of the electrical schematic diagrams of a cable tray-mounted AGV trolley charging and power distribution device provided in an embodiment of this application; Figure 3 The second electrical schematic diagram of a trough-mounted AGV trolley charging and power distribution device provided in this application embodiment; Figure 4The third electrical schematic diagram of a trough-mounted AGV trolley charging and power distribution device provided in this application embodiment.

[0018] Icons: 10 - Cable tray mounted AGV trolley charging and power distribution device; 100 - Housing; 200 - Current input connector; 300 - Current output connector; 400 - Charging output connector; 500 - Switch control module; 510 - Switch control unit; 511 - Solid state relay; 512 - First temperature control switch; 513 - Cooling fan; 514 - Heat sink; 515 - Second temperature control switch; 516 - Fuse. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] In the description of this application, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The term "connection" should be interpreted broadly, for example, it can refer to a direct connection or an indirect connection through an intermediate medium. The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] As described in the background section, in existing warehouse AGV charger power distribution systems, the power distribution box and AGV charging power distribution device are both independently installed on the wall, occupying limited warehouse space. Furthermore, long-distance, multi-path cables need to be laid from the power distribution room to the power distribution box and then to each charging power distribution device, resulting in a large amount of cable usage and high costs. Therefore, how to simplify the AGV charging power distribution architecture to save on cables, costs, and installation space is a technical problem that urgently needs to be solved by those skilled in the art.

[0022] To resolve the above technical issues, please refer to Figure 1 and Figure 2This application provides a trough-mounted AGV trolley charging and power distribution device 10, which includes: a housing 100, a switch control module 500, a busbar conductor, a current input connector 200, a current output connector 300, and at least one charging output connector 400.

[0023] The outer dimensions of the housing 100 match the inner dimensions of the cable trough, thus enabling the entire cable trough-mounted AGV trolley charging and power distribution device 10 to be installed in the existing cable trough on the warehouse roof, saving installation space.

[0024] The switch control module 500 and the busbar are both located inside the housing 100. The current input connector 200 and the current output connector 300 are located at opposite ends of the housing 100, and the charging output connector 400 is located on the side of the housing 100. The current input connector 200 is connected to the current output connector 300 via the busbar, and the switch control module 500 is connected to both the busbar and the charging output connector 400.

[0025] The current input connector 200 and the current output connector 300 are used to connect to an external power source and together with the busbar conductors, form the main power distribution circuit.

[0026] The charging output connector 400 is used to dock with the AGV trolley and transmit the enable signal sent by the AGV trolley to the switch control module 500.

[0027] The switch control module 500 is used to control the on / off state of the charging circuit according to the enable signal.

[0028] Understandably, the AGV charging and power distribution device 10 installed in the cable trays of this application can be directly embedded in the existing cable trays on the warehouse roof, replacing the independently installed wall-mounted distribution box and charging and power distribution device in the existing solution, effectively saving installation space. Furthermore, by integrating a busbar conductor inside the device and connecting it to the current input connector 200 and current output connector 300 at both ends of the device to form a main power distribution circuit, the power supply busbar can be directly laid along the roof cable tray and connected to the device. Simultaneously, by integrating a switch control module 500 inside the device, the charging circuit can be directly controlled to open and close based on the enable signal emitted by the AGV. Compared to the existing solution that requires long-distance multi-branch cables to be led from the wall distribution box to each charging point and configured with independent switch boxes, this application simplifies the AGV charging and power distribution architecture, not only saving installation space but also significantly reducing cable usage and cost, and improving the convenience of device installation and maintenance.

[0029] In one alternative implementation, the current input connector 200 and the current output connector 300 adopt a male-female plug-in structure to realize the series connection between multiple grooved AGV trolley charging and power distribution devices 10.

[0030] Understandably, by setting the current input connector 200 and current output connector 300 as a male-female plug-in structure, multiple AGV charging and distribution devices 10 installed in cable trays can be directly connected end-to-end without additional branch cables or adapters, thus constructing a continuous AC bus link laid along the cable trays on the warehouse roof. This cascaded connection method further eliminates the installation space and material costs required for setting up a separate distribution box for each charging point and laying long-distance cables, as in existing solutions. At the same time, the male-female plug-in structure ensures the consistency and reliability of the connections between devices, facilitates rapid on-site assembly and expansion, and enables the entire AGV charging and distribution system to flexibly adapt to warehouse environments of different sizes and layouts.

[0031] Furthermore, most existing solutions use traditional mechanical relays as switching devices. However, in scenarios requiring rapid, high-frequency charging, such as smart warehousing (e.g., AGVs cyclically recharging for two minutes followed by a two-minute rest), mechanical relays are prone to mechanical wear due to frequent engagement and disengagement, severely impacting their lifespan and resulting in slow response times. Moreover, the vibrations caused by high-frequency operation not only generate noise but also reduce the reliability of mechanical connections. Additionally, traditional mechanical relays generate electric arcs during connection and disconnection, causing electromagnetic interference to the power grid, making them unsuitable for applications requiring dense AGV clusters and repeated charging.

[0032] In view of this, please refer to Figure 2 In one alternative implementation, the switch control module 500 includes at least one switch control unit 510, which includes a solid-state relay (SSR) 511.

[0033] The anode of the LED of the solid-state relay 511 is connected to the charging output connector 400, the cathode of the LED of the solid-state relay 511 is connected to the bus conductor, the first terminal of the thyristor of the solid-state relay 511 is connected to the bus conductor, and the second terminal of the thyristor of the solid-state relay 511 is connected to the charging output connector 400.

[0034] When the AGV completes docking with the charging output connector 400 and needs charging, the AGV sends a charging enable signal (such as a high level) to the solid-state relay 511 through the charging output connector 400. The light-emitting diode inside the solid-state relay 511 is energized and conducts, triggering the thyristor inside the solid-state relay 511 to conduct. The power energy of the main power distribution circuit is rectified by the thyristor and sent to the charging output connector 400 to charge the AGV.

[0035] When the AGV is fully charged, it sends a power-off enable signal (such as a low level) to the solid-state relay 511 through the charging output connector 400. The LED inside the solid-state relay 511 is de-energized and cut off, and the thyristor inside the solid-state relay 511 is turned off, thereby cutting off the power supply to the main power distribution circuit and ending the charging process.

[0036] Understandably, this application uses a solid-state relay 511 as the core component of the switch control unit 510, leveraging its contactless switching characteristics based on semiconductor elements to replace traditional mechanical relays. In scenarios where intelligent warehouse AGVs require short-term, high-frequency charging, the solid-state relay 511 eliminates the need for mechanical engagement and disengagement, fundamentally removing reliability issues caused by mechanical wear, operational noise, and contact vibration. Its lifespan is significantly longer than that of traditional relays, and its response speed is also significantly improved, allowing for precise adaptation to intensive charging cycles. Furthermore, the solid-state relay 511 achieves electrical isolation between the input and output sides through an optocoupler, and generates no electric arc during conduction and disengagement, effectively avoiding electromagnetic interference to the power grid caused by contact arcing in traditional relays. This enhances the safety and reliability of the charging process, providing a feasible solution for efficient and automated energy replenishment of AGV clusters.

[0037] In another alternative implementation, both the current input connector 200 and the current output connector 300 are combination connectors for both high and low current applications. Both the current input connector 200 and the current output connector 300 include a three-phase AC bus interface (corresponding to pins 1, 2, and 3), a DC positive bus interface (corresponding to pin A), a DC negative bus interface (corresponding to pin E), and a ground interface (corresponding to pin GND).

[0038] Among them, the three-phase AC bus interface is used to carry a three-phase 300A high current transmission, the ground interface is adapted to a grounding conductor with a cross-sectional area of ​​50mm², and the DC positive bus interface and the DC negative bus interface together form a set of 24V DC bus interfaces rated at 10A.

[0039] Busbar conductors include three-phase AC busbar cables, DC positive busbar cables, DC negative busbar cables, and ground cables.

[0040] Each interface of the current input connector 200 is connected to each interface of the current output connector 300 via a corresponding cable in the busbar. Specifically, the three-phase AC busbar interface of the current input connector 200 is connected to the three-phase AC busbar interface of the current output connector 300 via a three-phase AC busbar cable; the DC positive busbar interface of the current input connector 200 is connected to the DC positive busbar interface of the current output connector 300 via a DC positive busbar cable; the DC negative busbar interface of the current input connector 200 is connected to the DC negative busbar interface of the current output connector 300 via a DC negative busbar cable; and the ground interface of the current input connector 200 is connected to the ground interface of the current output connector 300 via a ground cable.

[0041] The solid-state relay 511 internally includes a light-emitting diode and three thyristors. The charging output connector 400 includes a DC positive control interface (corresponding to pin 6), a DC negative control interface (corresponding to pin 5), a ground interface (corresponding to pin 3), and three output interfaces (corresponding to pins 1, 2, and 4).

[0042] The charging output connector 400 has its DC positive control interface and DC negative control interface connected to the DC positive bus cable and the anode of the LED in the solid-state relay 511, respectively. The cathode of the LED is connected to the DC negative bus cable. The three output interfaces of the charging output connector 400 are connected to the second terminals of the three thyristors in the solid-state relay 511, and the first terminals of the three thyristors are connected to the corresponding three-phase AC bus cables. The ground interface of the charging output connector 400 is connected to the ground cable.

[0043] It should be noted that the embodiments of this application do not limit the specific number of the switch control unit 510 and the charging output connector 400. They can be adaptively increased, decreased, and configured according to the number of AGVs that need to be charged simultaneously in the actual application scenario and the internal space layout of the device. For example, as... Figure 2 As shown, a trough-mounted AGV trolley charging and power distribution device 10 can include two switch control units 510 and four charging output connectors 400. Each switch control unit 510 is connected to two charging output connectors 400, so that two charging output connectors 400 can be managed simultaneously by one switch control unit 510. This effectively reduces the total number of switch control units 510 required, simplifies the internal layout of the device, and improves the device's integrated control capability for charging multiple AGV trolleys.

[0044] Based on the above design, the working principle of the entire device is explained below, taking the grooved AGV trolley charging and power distribution device 10, which includes two switch control units 510 and four charging output connectors 400, as an example: After the current input connector 200 and current output connector 300 at both ends of the device are connected to an external power source, the AC bus inside the device can carry a current of 300A, and the four load outputs (i.e., the charging output connector 400) can simultaneously support two outputs at a current of 30A. At this time, the device is in a power-on standby state.

[0045] When the AGV needs charging, it automatically docks with the charging output connector 400. After docking, it sends a high-level charging enable signal. This high-level signal is transmitted to the anode of the LED inside the solid-state relay 511 via the DC negative control interface of the charging output connector 400. The LED is energized and activates, which in turn triggers the thyristor inside the solid-state relay 511. The solid-state relay 511 then outputs a rectified high voltage to the charging output connector 400, thereby charging the AGV.

[0046] When the AGV is fully charged, it sends a low-level power-down enable signal. This low-level signal is transmitted to the anode of the LED inside the solid-state relay 511 via the DC negative control interface of the charging output connector 400. The LED turns off, which in turn triggers the thyristor inside the solid-state relay 511 to turn off. The solid-state relay 511 then cuts off the power supply from the main power distribution circuit to the charging output connector 400, and the charging process ends.

[0047] In practical applications, because this device integrates a three-phase AC busbar carrying a 300A high current and a solid-state relay 511, and the entire device is embedded in the cable trough installed on the roof of the warehouse, the space inside the cable trough is relatively sealed and air circulation is limited. Under the high-frequency cyclic charging condition of the AGV, the solid-state relay 511 continuously switches the current on and off, and the high current of the busbar itself is continuously transmitted, both of which will generate heat accumulation, affecting the safety and reliability of the device operation.

[0048] In view of this, please refer to Figure 3 In one alternative embodiment, the switch control unit 510 further includes a first temperature control switch 512, a cooling fan 513, and a heat sink 514.

[0049] The heat sink 514 is located near the cooling fan 513, and the cooling fan 513 is connected to the busbar via a first temperature control switch 512. Optionally, one end of the cooling fan 513 is connected to the DC positive busbar cable, and the other end of the cooling fan 513 is connected to the DC negative busbar cable via the first temperature control switch 512.

[0050] When the temperature of the AGV charging and power distribution device 10 installed in the trough exceeds the first preset temperature threshold (e.g., 50°C), the first temperature control switch 512 closes and the cooling fan 513 starts running so that air flows over the surface of the radiator 514 to cool it down.

[0051] Understandably, by setting the first temperature control switch 512, the cooling fan 513 and the heat sink 514, heat dissipation can be actively achieved when the temperature exceeds the first preset temperature threshold, thus preventing the device from affecting the long-term reliable operation of key components such as the solid-state relay 511 due to continuous heat accumulation in the sealed wire duct.

[0052] To further improve the safety and reliability of the device operation, in one optional embodiment, the switch control unit 510 further includes a second temperature control switch 515. The anode of the light-emitting diode of the solid-state relay 511 is connected to the charging output connector 400 via the second temperature control switch 515.

[0053] During charging, when the temperature of the AGV charging power distribution device 10 exceeds the second preset temperature threshold (e.g., 80°C), the second temperature control switch 515 opens to stop charging output. The second temperature control switch 515 closes again when the temperature drops to the third preset temperature threshold (e.g., 60°C), and the device resumes operation. Wherein, the first preset temperature threshold < the third preset temperature threshold < the second preset temperature threshold.

[0054] Understandably, by connecting the second temperature control switch 515 in series with the anode circuit of the LED in the solid-state relay 511, a graded thermal protection system is formed with the cooling fan 513: if the device temperature exceeds the first preset temperature threshold, the cooling fan 513 is activated to dissipate heat; if the temperature continues to rise and exceeds the second preset temperature threshold, the charging output is forcibly cut off; and charging is automatically resumed after the temperature drops back to the third preset temperature threshold. This graded strategy takes into account active cooling, overheat protection, and automatic recovery, ensuring thermal safety while reducing the impact of charging interruptions on AGV scheduling efficiency.

[0055] In another alternative implementation, please refer to Figure 4 The switch control unit 510 also includes a fuse 516. The first terminal of the thyristor of the solid-state relay 511 is connected to the busbar through the fuse 516.

[0056] Fuse 516 is used to disconnect the electrical connection between the main power distribution circuit and the charging circuit when a short circuit fault occurs in the charging circuit or load.

[0057] Understandably, by connecting a fuse 516 in series between the first terminal of the thyristor in the solid-state relay 511 and the busbar, when a short circuit fault occurs in the charging circuit or the load side, causing an abnormal increase in current, the fuse element inside the fuse 516 melts due to its own heating, thereby quickly cutting off the electrical connection between the main power distribution circuit and the charging circuit. This prevents excessive current from damaging high-voltage components such as the solid-state relay 511, the charging output connector 400, and the AGV trolley, thus achieving reliable short-circuit and overcurrent protection functions.

[0058] Optionally, embodiments of this application also provide a power distribution system, which includes a cable tray-mounted AGV trolley charging power distribution device 10 as described in any of the foregoing embodiments.

[0059] In summary, the cable tray-mounted AGV charging and power distribution device provided in this application can be directly embedded in the existing cable trays on the warehouse roof, replacing the independently installed wall-mounted distribution box in the traditional solution, thus saving installation space. The device uses current-combined male-female plug-in connectors at both ends, integrating a three-phase AC busbar, a 24V DC busbar, and a ground wire interface. This allows multiple devices to be cascaded end-to-end along the roof cable trays, directly constructing a continuous AC busbar link. This eliminates the need to lay long-distance branch cables from the distribution box to each charging point, significantly reducing cable usage and installation costs.

[0060] Furthermore, the device uses solid-state relays as the core of the charging circuit switching control. Utilizing their contactless switching characteristics, it fundamentally eliminates the problems of wear, vibration noise, arc interference, and short lifespan caused by mechanical engagement and disengagement in traditional mechanical relays during high-frequency cyclic charging scenarios. This significantly improves the response speed and long-term reliability of the charging circuit control. In addition, a comprehensive thermal management and electrical safety protection system is formed through a tiered temperature control mechanism (a first temperature control switch combined with a cooling fan for active cooling, and a second temperature control switch forcibly cutting off and automatically restoring operation in case of overheating) and fuse short-circuit protection, ensuring long-term stable operation of the device in a sealed cable tray environment.

[0061] In other words, this application has achieved significant optimizations in multiple dimensions such as installation space occupation, cable usage, system architecture complexity, and high-frequency charging reliability, providing a feasible solution for efficient and automated energy replenishment of AGV clusters that is compact, low-cost, and easy to maintain.

[0062] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0063] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A cable tray-mounted AGV trolley charging and power distribution device, characterized in that, include: Housing, switch control module, busbar conductor, current input connector, current output connector and at least one charging output connector; The outer dimensions of the housing match the inner dimensions of the cable trough. The switch control module and the busbar are both located inside the housing. The current input connector and the current output connector are located at both ends of the housing, and the charging output connector is located on the side of the housing. The current input connector is connected to the current output connector through the busbar, and the switch control module is connected to both the busbar and the charging output connector. The current input connector and the current output connector are used to connect to an external power source and together with the busbar conductors, form the main power distribution circuit. The charging output connector is used to connect to the AGV trolley and transmit the enable signal sent by the AGV trolley to the switch control module; The switch control module is used to control the on / off state of the charging circuit according to the enable signal.

2. The AGV trolley charging and power distribution device with cable tray installation according to claim 1, characterized in that, The switch control module includes at least one switch control unit, and the switch control unit includes a solid-state relay; The anode of the LED of the solid-state relay is connected to the charging output connector, the cathode of the LED of the solid-state relay is connected to the busbar, the first terminal of the SCR of the solid-state relay is connected to the busbar, and the second terminal of the SCR of the solid-state relay is connected to the charging output connector.

3. The AGV trolley charging and power distribution device with cable tray installation according to claim 2, characterized in that, Both the current input connector and the current output connector include a three-phase AC bus interface, a DC positive bus interface, a DC negative bus interface, and a ground interface; the busbar includes a three-phase AC bus cable, a DC positive bus cable, a DC negative bus cable, and a ground cable; each interface of the current input connector is connected to each interface of the current output connector through a corresponding cable in the busbar. The solid-state relay internally includes a light-emitting diode (LED) and three thyristors (SCRs). The charging output connector includes a DC positive control interface, a DC negative control interface, a ground interface, and three output interfaces. The DC positive and DC negative control interfaces of the charging output connector are respectively connected to the DC positive bus cable and the anode of the LED in the solid-state relay, and the cathode of the LED is connected to the DC negative bus cable. The three output interfaces of the charging output connector are respectively connected to the second terminals of the three SCRs in the solid-state relay, and the first terminals of the three SCRs are respectively connected to the corresponding three-phase AC bus cables. The ground interface of the charging output connector is connected to the ground cable.

4. The AGV trolley charging and power distribution device with cable tray installation according to claim 2, characterized in that, When the AGV is successfully docked with the charging output connector and needs to be charged, the AGV sends a charging enable signal to the solid-state relay through the charging output connector. The LED inside the solid-state relay is energized and conducts, triggering the thyristor inside the solid-state relay to conduct. The power supply of the main power distribution circuit is then transmitted to the charging output connector through the thyristor to charge the AGV.

5. The AGV trolley charging and power distribution device with cable tray installation according to claim 2, characterized in that, When the AGV completes charging, it sends a power-off enable signal to the solid-state relay through the charging output connector. The LED inside the solid-state relay is de-energized and cut off, and the thyristor inside the solid-state relay is turned off, thereby cutting off the power supply to the main power distribution circuit and ending the charging process.

6. The AGV trolley charging and power distribution device with cable tray installation according to claim 2, characterized in that, The switch control unit further includes a first temperature control switch, a cooling fan, and a radiator; the radiator is located near the cooling fan, and the cooling fan is connected to the busbar via the first temperature control switch; When the temperature of the AGV charging and power distribution device installed in the cable tray exceeds the first preset temperature threshold, the first temperature control switch closes and the cooling fan starts to run so that air flows over the surface of the radiator to cool it down.

7. The AGV trolley charging and power distribution device with cable tray installation according to claim 6, characterized in that, The switch control unit further includes a second temperature control switch; the anode of the light-emitting diode of the solid-state relay is connected to the charging output connector through the second temperature control switch; During the charging process, when the temperature of the grooved AGV charging power distribution device exceeds the second preset temperature threshold, the second temperature control switch is opened to stop the charging output until the temperature drops to the third preset temperature threshold, at which point the second temperature control switch is closed. Wherein, the first preset temperature threshold is less than the third preset temperature threshold and the second preset temperature threshold.

8. The AGV trolley charging and power distribution device with cable tray installation according to claim 2, characterized in that, The switch control unit also includes a fuse; the first terminal of the thyristor of the solid-state relay is connected to the busbar through the fuse; The fuse is used to disconnect the electrical connection between the main power distribution circuit and the charging circuit when a short circuit fault occurs in the charging circuit or the load.

9. The AGV trolley charging and power distribution device with cable tray installation according to claim 1, characterized in that, The current input connector and the current output connector adopt a male-female plug-in structure to realize the series connection between multiple AGV trolley charging and power distribution devices installed in the cable tray.

10. A power distribution system, characterized in that, The power distribution system includes the AGV trolley charging and power distribution device as described in any one of claims 1-9.

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