Highly integrated high-voltage power distribution cabinet
By designing a highly integrated high-voltage distribution power cabinet, the problems of complex design, poor generalization and inconvenient maintenance in the existing technology are solved, and the unified convergence and distribution of high-voltage circuits are realized, and the flexibility and maintenance convenience of the vehicle design are improved.
Patent Information
- Application Number
- CN202421490662.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The high-voltage power distribution design of existing construction machinery has problems such as complex design, poor general use, inconvenient maintenance, and waste of high-voltage port space.
A highly integrated high-voltage distribution power cabinet is designed, and multiple high-voltage input and output units are arranged in parallel and connected to the PDU controller to realize unified convergence and distribution of high-voltage circuits, and accurately monitor and control the operating status of each branch.
It realizes high integration of high-voltage circuits, reduces the difficulty of vehicle design, improves maintenance convenience and fault handling efficiency, and is suitable for different vehicle models and design needs.
Smart Images
Figure CN222763385U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-voltage power distribution, in particular to a highly integrated high-voltage power distribution power cabinet. Background Art
[0002] There are two existing ways to design high-voltage power distribution for construction machinery: one is to redesign the internal structure of the battery BMS high-voltage box according to the actual application of the construction machinery, and add the corresponding high-voltage power interface; the other is to entrust the high-voltage distribution task to the all-in-one motor driver. However, redesigning the internal structure of the battery BMS high-voltage box requires the cooperation of upstream battery manufacturers, making targeted modifications to the internal circuit of the battery and the battery shell, and then the manufacturer will re-open the mold and customize the development according to the specific high-voltage distribution needs. This design method is only suitable for the case where the number of construction machinery motors is small, and it has poor versatility, which is not conducive to the large-scale production and application promotion of the product. The method of using a motor driver to perform the high-voltage distribution task will have the problem of wasting high-voltage port space, and the motor driver will cause the high-voltage power distribution to be dispersed, making the internal high-voltage line layout bloated, which is not conducive to the later maintenance and updating of the product. Utility Model Content
[0003] In order to solve the above problems, the utility model proposes a highly integrated high-voltage power distribution cabinet.
[0004] The power distribution cabinet is provided with the following three high-voltage input units in parallel according to different high-voltage input types, including:
[0005] The first high-voltage input unit comprises a high-voltage line, an input main circuit and an input pre-charging circuit, wherein the input main circuit and the input pre-charging circuit are connected in parallel through the high-voltage line, and after receiving the high-voltage current connected from the first high-voltage input interface, the current output by the convergence is led out to the mother copper busbar of the power distribution cabinet;
[0006] The second high-voltage input unit comprises a high-voltage line and an input main circuit. After the input main circuit receives the high-voltage current introduced from the second high-voltage input interface, it outputs the output current to the female copper busbar of the power distribution cabinet;
[0007] A third high-voltage input unit, comprising only a high-voltage line, is used for the third high-voltage input interface to establish an electrical connection with the female copper busbar of the power distribution cabinet through the high-voltage line;
[0008] The power distribution cabinet is provided with the following three output units in parallel according to different electric power output requirements, including:
[0009] The first output unit comprises a high-voltage line, an output main circuit and an output pre-charging circuit, wherein the output main circuit and the output pre-charging circuit are connected in parallel through the high-voltage line, and after receiving the current connected from the mother copper busbar, the converged current is exported to the output interface of the first power distribution cabinet;
[0010] The second output unit comprises a high-voltage line and an output main circuit, wherein the output main circuit receives the current connected to the mother copper busbar and then outputs the output current to the output interface of the second power distribution cabinet;
[0011] The third output unit comprises a high voltage line and a DCDC module. After receiving the current connected to the mother copper busbar, the DCDC module exports the output current to the output interface of the third power distribution cabinet;
[0012] All input main circuits, input pre-charging circuits, output main circuits, and output pre-charging circuits in the power distribution cabinet are electrically connected to the PDU controller via a low-voltage line.
[0013] In some possible embodiments, the input main circuit includes an electrically connected main relay and a fuse; the input pre-charge circuit includes an electrically connected pre-charge relay and a pre-charge resistor; the output main circuit includes an electrically connected main relay and a fuse; the output pre-charge circuit includes an electrically connected pre-charge relay and a pre-charge resistor.
[0014] In some possible implementations, the PDU controller receives commands from the vehicle controller VCU and operating status feedback of the on-board charger OBC and DCDC modules through a CAN loop.
[0015] In some possible implementations, the mother copper busbar is also connected to a grounding protection loop.
[0016] In some possible implementations, the PDU controller, the main relay, the fuse, the pre-charge relay, the pre-charge resistor, and the DCDC module are all connected to the cabinet in a modular and detachable manner.
[0017] In some possible implementations, the cabinet body of the high-voltage power distribution cabinet is provided with heat dissipation holes.
[0018] In some possible implementations, the first high-voltage input interface is connected to a range-extended generator.
[0019] In some possible implementations, the second high-voltage input interface is connected to the on-board charger OBC power transmission port.
[0020] In some possible implementations, the third high-voltage input interface is connected to a power transmission port of a power battery.
[0021] In some possible implementations, the first power distribution cabinet output interface is connected to the motor driver; the second power distribution cabinet output interface is connected to the air conditioning circuit and the PTC circuit; the third power distribution cabinet output interface is connected to the low-voltage power supply circuit of the whole vehicle.
[0022] The implementation of the utility model can at least produce the following beneficial technical effects: through the high-voltage power distribution cabinet, engineering designers can achieve high integration of high-voltage circuits when designing the whole vehicle, reducing the difficulty of mechanical design and electrical design when designing the whole vehicle. While realizing the unified convergence and unified distribution of different high-voltage power sources, the high-voltage power distribution cabinet can also accurately monitor and control the operating status of each branch. When problems occur in the power distribution system, technicians can accurately locate the specific circuit, making the maintenance and update of the device more convenient. The high modularity of the high-voltage power distribution cabinet can realize the deletion and specification change of electrical components according to different customer needs, and the electrical components can also flexibly choose the horizontal laying method and the vertical laying method to meet the requirements of different designs of different models. The highly modularized circuit also enables another group of circuits with the same function to be used as a temporary replacement when a problem occurs in a certain circuit, making temporary fault handling more convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings constituting a part of the present utility model are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.
[0024] Figure 1 It is a schematic diagram of a highly integrated high-voltage power distribution cabinet system framework provided according to an embodiment of the utility model;
[0025] Figure 2 It is a specific structural image of the internal part of the high-voltage power distribution cabinet provided according to the embodiment of the utility model;
[0026] Figure 3 It is a cross-sectional view of the structure of a high-voltage power distribution cabinet provided according to an embodiment of the utility model;
[0027] Figure 4 It is an image of the input interface side of the high-voltage power distribution cabinet provided according to an embodiment of the utility model;
[0028] Figure 5 It is an image of the output interface side of the high-voltage power distribution cabinet provided according to an embodiment of the utility model.
[0029] Reference numerals:
[0030] 1- Pre-charge relay; 2- Main relay; 3- Pre-charge resistor; 4- Fuse; 5- PDU controller; 6- DCDC module. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs. Although any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present disclosure, exemplary methods and materials are now described.
[0033] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.
[0034] See also Figure 1 , Figure 1 A schematic diagram of a highly integrated high-voltage power distribution cabinet provided in this embodiment. The power distribution cabinet in this embodiment is provided with the following three high-voltage input units in parallel according to different high-voltage input types, including:
[0035] The first high-voltage input unit comprises a high-voltage line, an input main circuit and an input pre-charging circuit, wherein the input main circuit and the input pre-charging circuit are connected in parallel through the high-voltage line, and after receiving the high-voltage current connected from the first high-voltage input interface, the output current of the converged current is led out to the mother copper busbar of the power distribution cabinet.
[0036] The second high-voltage input unit includes a high-voltage line and an input main circuit. After the input main circuit receives the high-voltage current introduced from the second high-voltage input interface, it outputs the output current to the mother copper busbar of the power distribution cabinet.
[0037] The third high-voltage input unit only includes a high-voltage line, which is used for the third high-voltage input interface to establish an electrical connection with the mother copper busbar of the power distribution cabinet through the high-voltage line. The high-voltage power sources of the whole vehicle from different sources will be aggregated to the mother copper busbar.
[0038] The power distribution cabinet is provided with the following three output units in parallel according to different electric power output requirements, including:
[0039] The first output unit comprises a high-voltage line, an output main circuit and an output pre-charging circuit, wherein the output main circuit and the output pre-charging circuit are connected in parallel via the high-voltage line, and after receiving the current connected from the mother copper bus, the converged current is exported to the output interface of the first power distribution cabinet.
[0040] The second output unit comprises a high voltage line and an output main circuit, wherein the output main circuit receives the current connected to the mother copper busbar and then outputs the output current to the output interface of the second power distribution cabinet.
[0041] The third output unit includes a high-voltage line and a DCDC module. After receiving the current connected to the mother copper busbar, the DCDC module exports the output current to the output interface of the third power distribution cabinet.
[0042] All input main circuits, input pre-charging circuits, output main circuits, and output pre-charging circuits in the power distribution cabinet are electrically connected to the PDU controller via a low-voltage line.
[0043] Preferably, the input main circuit includes an electrically connected main relay and a fuse; the input pre-charging circuit includes an electrically connected pre-charging relay and a pre-charging resistor; the output main circuit includes an electrically connected main relay and a fuse; the output pre-charging circuit includes an electrically connected pre-charging relay and a pre-charging resistor. The main function of the pre-charging circuit is to pre-charge the load with a small current before reconnecting the high-voltage electrical circuit after disconnection, so as to ensure that when the main circuit is closed, arc discharge will not be caused by instantaneous large current, thereby causing device damage or personal injury.
[0044] Furthermore, the PDU controller receives commands from the vehicle controller VCU and operating status feedback from the onboard charger OBC and DCDC modules through the CAN loop. Through the above means, it is possible to achieve independent control and monitoring of each loop, and to provide feedback on the high-voltage interlocking status of the PDU cabinet and the status of each input and output loop relay through the CAN loop, so that the VCU can timely and accurately grasp the operating status of each branch.
[0045] Preferably, the mother copper bar is also connected to a grounding protection circuit. The grounding protection circuit can ensure that when a circuit fault occurs in the high-voltage power distribution cabinet, the fault current can be quickly directed to the ground to protect the personnel and equipment on the vehicle from damage by the motor.
[0046] See also Figure 2-5 , Figure 2-5 The multi-view images of the high-voltage power distribution cabinet provided in this embodiment, wherein the PDU controller, main relay, fuse, pre-charge relay, pre-charge resistor and DCDC module are all connected to the cabinet in a modular and detachable manner.
[0047] Furthermore, the cabinet body of the high-voltage power distribution cabinet is also provided with heat dissipation holes for dissipating heat when the power distribution cabinet is in operation.
[0048] Furthermore, the first high-voltage input interface may be connected to a range-extended generator.
[0049] Furthermore, the second high-voltage input interface can be connected to the OBC power transmission port of the vehicle charger. When the connected OBC can provide the mains power distribution function, the mains power is distributed to each OBC and then the converted DC power is input into the PDU controller.
[0050] Furthermore, the third high-voltage input interface is connected to a power transmission port of a power battery.
[0051] Furthermore, the first power distribution cabinet output interface is connected to the motor driver. The second power distribution cabinet output interface is connected to the air conditioning circuit and the PTC circuit. The third power distribution cabinet output interface is connected to the low-voltage power supply circuit of the vehicle.
[0052] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.
Claims
1. A highly integrated high-voltage power distribution cabinet, characterized in that: The power distribution cabinet is provided with the following three high-voltage input units in parallel according to different high-voltage input types, including: The first high-voltage input unit comprises a high-voltage line, an input main circuit and an input pre-charging circuit, wherein the input main circuit and the input pre-charging circuit are connected in parallel through the high-voltage line, and after receiving the high-voltage current connected from the first high-voltage input interface, the current output by the convergence is led out to the mother copper busbar of the power distribution cabinet; The second high-voltage input unit comprises a high-voltage line and an input main circuit. After the input main circuit receives the high-voltage current introduced from the second high-voltage input interface, it outputs the output current to the female copper busbar of the power distribution cabinet; A third high-voltage input unit, comprising only a high-voltage line, is used for the third high-voltage input interface to establish an electrical connection with the female copper busbar of the power distribution cabinet through the high-voltage line; The power distribution cabinet is provided with the following three output units in parallel according to different electric power output requirements, including: The first output unit comprises a high-voltage line, an output main circuit and an output pre-charging circuit, wherein the output main circuit and the output pre-charging circuit are connected in parallel through the high-voltage line, and after receiving the current connected from the mother copper busbar, the converged current is exported to the output interface of the first power distribution cabinet; The second output unit comprises a high-voltage line and an output main circuit, wherein the output main circuit receives the current connected to the mother copper busbar and then outputs the output current to the output interface of the second power distribution cabinet; The third output unit comprises a high voltage line and a DCDC module. After receiving the current connected to the mother copper busbar, the DCDC module exports the output current to the output interface of the third power distribution cabinet; All input main circuits, input pre-charging circuits, output main circuits, and output pre-charging circuits in the power distribution cabinet are electrically connected to the PDU controller via a low-voltage line.
2. The highly integrated high-voltage power distribution cabinet according to claim 1 is characterized in that: The input main circuit includes an electrically connected main relay and a fuse; the input pre-charge circuit includes an electrically connected pre-charge relay and a pre-charge resistor; The output main circuit includes an electrically connected main relay and a fuse; the output pre-charging circuit includes an electrically connected pre-charging relay and a pre-charging resistor.
3. The highly integrated high-voltage power distribution cabinet according to claim 1, characterized in that: The PDU controller receives commands from the vehicle controller VCU and operating status feedback of the on-board charger OBC and DCDC modules through the CAN loop.
4. The highly integrated high-voltage power distribution cabinet according to claim 1 is characterized in that: The mother copper busbar is also connected to a grounding protection circuit.
5. The highly integrated high-voltage power distribution cabinet according to claim 2, characterized in that: The PDU controller, main relay, fuse, pre-charge relay, pre-charge resistor and DCDC module are all connected to the cabinet in a modular and detachable manner.
6. The highly integrated high-voltage power distribution cabinet according to claim 1, characterized in that: The cabinet body of the high-voltage power distribution cabinet is provided with heat dissipation holes.
7. The highly integrated high-voltage power distribution cabinet according to claim 1, characterized in that: The first high-voltage input interface is connected to the range-extended generator.
8. The highly integrated high-voltage power distribution cabinet according to claim 1, characterized in that: The second high-voltage input interface is connected to the on-board charger OBC power transmission port.
9. The highly integrated high-voltage power distribution cabinet according to claim 1, characterized in that: The third high voltage input interface is connected to the power battery power transmission port.
10. The highly integrated high-voltage power distribution cabinet according to claim 1, characterized in that: The output interface of the first power distribution cabinet is connected to the motor driver; The output interface of the second power distribution cabinet is connected to the air conditioning circuit and the PTC circuit; The output interface of the third power distribution cabinet is connected to the low-voltage power supply circuit of the whole vehicle.