Power distribution device

Abstract

The utility model relates to the technical field of power distribution, in particular to a power distribution device, which comprises a plug-in hybrid commercial vehicle chassis provided with a high-voltage power distribution unit used for outputting high-voltage direct current; the high-voltage power distribution unit is connected with the inverter through a first cable assembly, and the inverter is used for converting the received high-voltage direct current into alternating current; the inverter is connected with the alternating-current distribution box through a second cable assembly, and the alternating-current distribution box is connected with electric equipment through an alternating-current cable so as to supply power frequency power to the electric equipment. The scheme is used for solving the defect of unstable power generation quality of a power distribution device in the prior art, and stable and high-quality power frequency power supply is provided for high-power complete-set loading equipment.

Description

Technical Field

[0001] This utility model relates to the field of power distribution technology, and in particular to a power distribution device. Background Technology

[0002] Existing high-power superstructure equipment power distribution devices mainly rely on the traditional solution of mounting a diesel generator on the chassis of a diesel commercial vehicle. While this traditional power generation setup can meet power demand to a certain extent in practical applications, its power generation quality is not stable enough.

[0003] Specifically, traditional diesel generators struggle to maintain a constant output frequency and voltage level during operation, leading to fluctuations in power quality. Due to limitations in their mechanical structure and control systems, diesel generators are prone to frequency shifts and voltage fluctuations when the load changes, posing a potential risk to sensitive electronic equipment that requires a stable power input.

[0004] Furthermore, the design of traditional diesel generators has failed to fully consider the high-quality power requirements of modern electrical equipment, especially in terms of industrial frequency power supply. With technological advancements, an increasing number of high-power complete sets of equipment are placing higher demands on the stability, purity, and reliability of power supply. Existing diesel generator sets often fail to meet these stringent standards, leading to low operating efficiency and potentially affecting the quality of the final product and the safety of the production process. Utility Model Content

[0005] This utility model provides a power distribution device to solve the defect of unstable power generation quality in existing power distribution devices, and to provide a stable and high-quality power supply for high-power complete sets of equipment.

[0006] This utility model provides a power distribution device, comprising: a plug-in hybrid commercial vehicle chassis, equipped with a high-voltage power distribution unit, the high-voltage power distribution unit being used to output high-voltage direct current; an inverter, the high-voltage power distribution unit being connected to the inverter via a first cable assembly, the inverter being used to convert the received high-voltage direct current into alternating current; and an AC distribution box, the inverter being connected to the AC distribution box via a second cable assembly, the AC distribution box being connected to electrical equipment via AC cables to supply power frequency to the electrical equipment.

[0007] According to one embodiment of the present invention, the plug-in hybrid commercial vehicle chassis is further provided with: a power type battery for storing electrical energy; and a generator controller connected to the power type battery and the high-voltage power distribution unit via a high-voltage DC cable for controlling the distribution of the high-voltage DC power.

[0008] According to one embodiment of the present invention, the plug-in hybrid commercial vehicle chassis is further provided with: an e-CVT transmission, which is connected to the generator controller via a high-voltage AC cable for adjusting power output; and a diesel engine, which is connected to the e-CVT transmission via a mechanical structure for driving the e-CVT transmission.

[0009] According to one embodiment of the present invention, the second cable assembly includes: an A-phase AC cable for transmitting A-phase AC power; a B-phase AC cable for transmitting B-phase AC power; an N-phase AC cable as a neutral wire for providing a reference point and loop for the circuit; and a C-phase AC cable for transmitting C-phase AC power, wherein the A-phase AC cable, B-phase AC cable, N-phase AC cable, and C-phase AC cable together constitute a three-phase four-wire AC power transmission system.

[0010] According to one embodiment of the present invention, the first cable assembly includes: a positive high-voltage DC cable for transmitting positive high-voltage DC power; and a negative high-voltage DC cable for transmitting negative high-voltage DC power.

[0011] According to one embodiment of the present invention, the first cable assembly includes a low-voltage communication cable; the high-voltage power distribution unit sends the CAN control commands of the plug-in hybrid commercial vehicle chassis to the inverter through the low-voltage communication cable.

[0012] According to one embodiment of the present invention, the inverter includes a plurality of inverter units, which are connected in parallel with each other.

[0013] According to one embodiment of the present invention, the inverter includes: an input control relay disposed upstream of the circuit of the plurality of inverter units; and an output protection relay disposed downstream of the circuit of the plurality of inverter units.

[0014] According to one embodiment of the present invention, the inverter includes: an input filtering unit disposed upstream of the circuit of the input control relay, used to reduce interference and harmonics in the input high voltage DC power; and an output filtering unit disposed downstream of the circuit of the output protection relay, used to reduce interference and harmonics in the inverted AC power.

[0015] According to one embodiment of the present invention, the inverter includes: a control and display unit connected to a plurality of inverter units, used to monitor and display the operating status of the inverter and receive CAN control commands from the plug-in hybrid commercial vehicle chassis; and an auxiliary power supply unit connected in series between the input filter unit and the control and display unit, used to provide the required low-voltage power supply to the internal components of the inverter.

[0016] The power distribution device provided by this utility model uses a plug-in hybrid commercial vehicle chassis and a high-voltage power distribution unit to output high-voltage direct current (DC). The high-voltage power distribution unit is then connected to an inverter via a first cable assembly. The inverter converts the DC power into high-quality alternating current (AC). This design utilizes the inverter's ability to precisely control and regulate the output current, effectively solving the frequency deviation and voltage fluctuation problems caused by the mechanical structure and control system limitations of traditional diesel generators. Furthermore, the inverter is connected to an AC distribution box via a second cable assembly, which then directly supplies stable and high-quality power to the electrical equipment via AC cables. This configuration not only improves the stability of the power supply but also ensures the purity of the power, meeting the stringent power quality requirements of modern high-power complete sets of equipment and providing reliable and efficient power support under various operating conditions. Therefore, this utility model effectively overcomes the defects of unstable power generation quality in existing power distribution devices, providing a more stable and high-quality power supply for high-power complete sets of equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the power connection relationship of the power distribution device provided by this utility model.

[0019] Figure 2 This is a schematic diagram of the system architecture of the power distribution device provided by this utility model.

[0020] Figure 3 This is a schematic diagram of the unit architecture of the inverter in the power distribution device provided by this utility model.

[0021] Figure label:

[0022] 10. Plug-in hybrid commercial vehicle chassis; 11. Positive high-voltage DC cable; 12. Negative high-voltage DC cable; 13. Low-voltage communication cable; 14. Diesel engine; 15. e-CVT transmission; 16. Power-type battery; 17. Generator controller; 18. High-voltage power distribution unit; 20. Inverter; 21. A-phase AC cable; 22. B-phase AC cable; 23. N-phase AC cable; 24. C-phase AC cable; 30. AC distribution box; 31. Electrical equipment. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The following is combined Figures 1-3 This invention describes the specific implementation of the power distribution device.

[0026] like Figure 1As shown, this utility model provides a power distribution device, including: a plug-in hybrid commercial vehicle chassis 10, equipped with a high-voltage power distribution unit 18, which outputs high-voltage direct current (DC); an inverter 20, the high-voltage power distribution unit 18 being connected to the inverter 20 via a first cable assembly, the inverter 20 converting the received DC power into AC power; and an AC distribution box 30, the inverter 20 being connected to the AC distribution box 30 via a second cable assembly, the AC distribution box 30 being connected to electrical equipment 31 via AC cables to supply power to the electrical equipment 31. This power distribution device outputs a stable high-voltage DC power supply through the high-voltage power distribution unit 18 and converts it into high-quality AC power using the high-efficiency inverter 20. The plug-in hybrid commercial vehicle chassis 10 not only provides mobility but also preferably integrates a rechargeable battery pack, which can supply power to the high-voltage power distribution unit 18 when the vehicle is stationary, thereby reducing reliance on traditional diesel generators. The inverter 20 is designed with precise control of voltage and frequency to ensure stable power output even under load changes, solving the problem of unstable power generation quality in traditional power generation systems and ensuring stable and reliable power support for sensitive electrical equipment 31.

[0027] Furthermore, the inverter 20 of the aforementioned power distribution device can be selected to have multiple protection functions (such as overload protection, short circuit protection, etc.) to improve the safety and reliability of the system. For example, in the event of a sudden high power demand or circuit failure, the inverter 20 can automatically cut off the power supply to prevent damage to the electrical equipment 31 or other electrical components. In addition, the AC distribution box 30 can be configured with different circuit breakers and switches according to actual needs to facilitate the management and distribution of power to different electrical equipment 31. For specific application scenarios, such as construction sites or emergency rescue sites, the configuration can be optimized for different types of electrical equipment 31 (such as lighting systems, power tools, communication equipment, etc.) to ensure that each device receives a stable power supply suitable for its operating requirements.

[0028] like Figure 2As shown, according to a power distribution device of this utility model, the plug-in hybrid commercial vehicle chassis 10 is further equipped with: a power-type battery 16 for storing electrical energy; and a generator controller 17, which is connected to the power-type battery 16 and the high-voltage power distribution unit 18 via a high-voltage DC cable, for controlling the distribution of high-voltage DC power. The power-type battery 16, as an energy storage unit, can be charged by the generator driven by the hybrid system's engine during vehicle operation, or it can be charged by an external power source when the vehicle is stopped, thereby providing a continuous and stable power input to the high-voltage power distribution unit 18. The generator controller 17 can monitor the status of the high-voltage power distribution unit 18 and the power-type battery 16 in real time, and intelligently allocate power resources according to actual power demand. For example, under high load conditions, when the inverter 20 needs to convert a large amount of power into AC power to supply the electrical equipment 31, the generator controller 17 can preferentially draw power from the power-type battery 16 to ensure the continuity and stability of power supply. At the same time, the generator controller 17 can also adjust the generator's output power to avoid excessive consumption of fuel or battery power, thereby improving energy utilization efficiency. In addition, the controller preferably also has a fault diagnosis function, which can take protective measures immediately when abnormal conditions (such as overvoltage, undervoltage, overcurrent, etc.) are detected to prevent damage to the entire electrical system.

[0029] According to a power distribution device of this utility model, the plug-in hybrid commercial vehicle chassis 10 is further equipped with: an e-CVT transmission 15, connected to a generator controller 17 via a high-voltage AC cable, for regulating power output; and a diesel engine 14, connected to the e-CVT transmission 15 via a mechanical structure, for driving the e-CVT transmission 15. In this system, the e-CVT (electronic continuously variable transmission) transmission can not only seamlessly combine the power from the diesel engine 14 and the electric motor, but also optimize power output to meet different driving conditions and load requirements. When the vehicle needs additional power, such as for acceleration or hill climbing, the diesel engine 14 can drive the e-CVT transmission 15 through a mechanical structure, while the generator controller 17 can regulate the conversion of high-voltage DC power into high-voltage AC power to supply the electric motor in the e-CVT transmission 15, enhancing power output. This hybrid power mechanism ensures smooth and efficient energy transfer under various operating conditions.

[0030] Furthermore, the generator controller 17 is responsible for monitoring and managing the energy flow between the high-voltage power distribution unit 18 and the power battery 16 during this process. It can also intelligently adjust the generator's operating status according to actual power demand. For example, under high load conditions, if insufficient battery power is detected, the controller will automatically increase the workload of the diesel engine 14, thereby driving the generator through the e-CVT transmission 15 to generate more electrical energy to replenish the power battery 16, ensuring the stable operation of the entire system.

[0031] According to a power distribution device of this utility model, the second cable assembly includes: an A-phase AC cable 21 for transmitting A-phase AC power; a B-phase AC cable 22 for transmitting B-phase AC power; an N-phase AC cable 23 as a neutral wire, used to provide a reference point and loop for the circuit; and a C-phase AC cable 24 for transmitting C-phase AC power. The A-phase AC cable 21, B-phase AC cable 22, N-phase AC cable 23, and C-phase AC cable 24 together constitute a three-phase four-wire AC power transmission system. This three-phase four-wire system can simultaneously support the power supply needs of both three-phase and single-phase loads. In this utility model, after the inverter 20 converts high-voltage DC power into three-phase AC power, the three-phase current is transmitted through the A-phase, B-phase, and C-phase AC cables 24 respectively. The N-phase AC cable 23, as a neutral wire, not only provides a reference potential for the circuit but also constitutes a complete current loop. Furthermore, when the three-phase load is unbalanced, the N-phase AC cable 23 can effectively carry the unbalanced current, preventing equipment damage or performance degradation due to voltage deviation.

[0032] According to a power distribution device of this utility model, the first cable assembly includes: a positive high-voltage DC cable 11 for transmitting positive high-voltage DC power; and a negative high-voltage DC cable 12 for transmitting negative high-voltage DC power. By using independent positive and negative cables to transmit high-voltage DC power separately, energy loss and safety hazards caused by incomplete current loops or poor contact can be effectively avoided, ensuring that high-voltage DC power can be transmitted from the high-voltage distribution unit 18 to the inverter 20 in an efficient and safe manner, providing a stable foundation for subsequent power conversion processes.

[0033] According to a power distribution device of this utility model, the first cable assembly includes a low-voltage communication cable 13; the high-voltage power distribution unit 18 sends CAN control commands from the plug-in hybrid commercial vehicle chassis 10 to the inverter 20 via the low-voltage communication cable 13. In this utility model, the low-voltage communication cable 13 is mainly used to transmit control signals and data information, especially control commands based on the CAN bus protocol. The CAN bus is a serial communication network widely used in the automotive industry, characterized by high reliability, real-time performance, and flexibility. By using the CAN bus protocol, the high-voltage power distribution unit 18 can efficiently exchange data with the inverter 20, achieving precise control of the power conversion process. For example, at the initial stage of vehicle startup or when a rapid response to load changes is required, the high-voltage power distribution unit 18 can inform the inverter 20 of the current operating mode (such as energy-saving mode, high-performance mode, etc.) via CAN control commands, enabling the inverter 20 to quickly adjust its operating state and provide the necessary power support. In addition, when a system fault or abnormal situation is detected, the high-voltage power distribution unit 18 can also send protection commands to the inverter 20 via the low-voltage communication cable 13 to ensure timely measures are taken to avoid further damage.

[0034] like Figure 3 As shown, according to a power distribution device of this utility model, the inverter 20 includes multiple inverter units connected in parallel. The parallel-connected inverter units can share the load current, enabling the entire inverter 20 system to handle higher total power demands. Each inverter unit operates independently but outputs synchronously, which helps balance the load distribution among the units and avoids the risk of overload or failure of a single unit. When one inverter unit fails, other normally operating inverter units can continue to provide power support, thereby improving the system's redundancy and reliability.

[0035] According to a power distribution device of this utility model, the inverter 20 includes: an input control relay, disposed upstream of the circuit of multiple inverter units; and an output protection relay, disposed downstream of the circuit of multiple inverter units. By setting the input control relay and the output protection relay at key locations in the inverter 20, the safety, reliability, and maintainability of the system are enhanced. Specifically, the input control relay is disposed upstream of the circuit between the high-voltage distribution unit 18 and the multiple inverter units. Its main function is to control the on / off state of the high-voltage DC power input to the inverter units. This not only facilitates safe operation during system startup or shutdown, but also allows for rapid disconnection of the power input when abnormal conditions (such as overvoltage, undervoltage, etc.) are detected, preventing damage to the inverter units. The output protection relay is disposed downstream of the circuit between the multiple inverter units and the AC distribution box 30. Its function is to protect the electrical equipment at the output of the inverter 20 and ensure the stable operation of the entire system. The output protection relay can monitor the status of the output current and voltage. Once a fault is detected (such as short circuit, overload, etc.), it will disconnect the connection between the inverter 20 and the electrical equipment 31 to prevent the fault from spreading and affecting other parts of the system.

[0036] According to a power distribution device of this utility model, the inverter 20 includes: an input filter unit disposed upstream of the input control relay circuit, used to reduce interference and harmonics in the input high-voltage direct current; and an output filter unit disposed downstream of the output protection relay circuit, used to reduce interference and harmonics in the inverted alternating current. By adding filter units at key locations, the quality of power transmission and the stability of the system are significantly improved.

[0037] Specifically, the high-voltage DC power supply may be affected by the high-voltage distribution unit 18 or other external factors (such as electromagnetic interference), causing unnecessary noise and harmonics to be mixed into the current. If these interference signals are not processed, they may negatively affect the operating efficiency and lifespan of the inverter unit. The input filter unit is located upstream of the circuit between the high-voltage distribution unit 18 and the input control relay. Its main function is to purify the high-voltage DC power supply input to the inverter 20 and reduce any electrical interference and harmonic components that may exist in it.

[0038] Although the alternating current generated during the inverter process has been converted to the required frequency and voltage level, it may still contain certain interference and harmonic components. These undesirable signals may adversely affect sensitive electrical equipment 31, and may even lead to equipment failure or performance degradation. The output filtering unit is located downstream of the circuit between multiple inverter units and the output protection relay, and further purifies the alternating current before it enters the electrical equipment 31.

[0039] According to a power distribution device of this utility model, the inverter 20 includes: a control and display unit connected to multiple inverter units, used to monitor and display the operating status of the inverter 20 and receive CAN control commands from the plug-in hybrid commercial vehicle chassis 10; and an auxiliary power supply unit connected in series between the input filter unit and the control and display unit, used to provide the required low-voltage power to the internal components of the inverter 20. By integrating the control and display unit and the auxiliary power supply unit, the intelligence level, operational reliability, and self-sufficiency of the inverter 20 are further improved.

[0040] Specifically, the control and display unit, as the core management module of the inverter 20, is directly connected to multiple inverter units connected in parallel, and is used to monitor and display the operating status of the inverter 20 in real time. Its main functions include collecting operating parameters of each inverter unit (such as input voltage, output current, frequency, temperature, etc.) and presenting this information in an intuitive way, making it easy for operators to understand the current operating status of the system. In addition, the control and display unit can also receive CAN control commands from the plug-in hybrid commercial vehicle chassis 10, realizing remote management and intelligent control of the inverter 20. The auxiliary power supply unit is connected in series between the input filtering unit and the control and display unit. Its function is to convert the filtered high-voltage DC power into a low-voltage power supply (such as 12V or 24V) suitable for the internal components of the inverter 20.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A power distribution device, characterized by, The plug-in hybrid commercial vehicle chassis is provided with a high-voltage power distribution unit for outputting high-voltage direct current. An inverter is connected to the high-voltage power distribution unit through a first cable assembly, and the inverter is used to convert the received high-voltage direct current into alternating current. An alternating current power distribution box is connected to the inverter through a second cable assembly, and the alternating current power distribution box is connected to electrical equipment through an alternating current cable to supply power frequency power to the electrical equipment. The plug-in hybrid commercial vehicle chassis is further provided with:

2. The power distribution device of claim 1, wherein, A power type power battery for storing electrical energy; A generator controller connected to the power type power battery and the high-voltage power distribution unit through a high-voltage direct current cable for controlling the distribution of high-voltage direct current. The plug-in hybrid commercial vehicle chassis is further provided with:

3. The power distribution device of claim 2, wherein, An e-CVT gearbox connected to the generator controller through a high-voltage alternating current cable for adjusting power output; A diesel engine connected to the e-CVT gearbox through a mechanical structure for driving the e-CVT gearbox. The second cable assembly includes:

4. The power distribution device of claim 1, wherein, An A-phase alternating current cable for transmitting A-phase alternating current; A B-phase alternating current cable for transmitting B-phase alternating current; An N-phase alternating current cable as a neutral line for providing a reference point and a return circuit for the circuit; A C-phase alternating current cable for transmitting C-phase alternating current, Wherein, the A-phase alternating current cable, the B-phase alternating current cable, the N-phase alternating current cable and the C-phase alternating current cable together constitute a three-phase four-wire alternating current transmission system. The first cable assembly includes:

5. The power distribution device of claim 1, wherein, A positive high-voltage direct current cable for transmitting positive high-voltage direct current; A negative high-voltage direct current cable for transmitting negative high-voltage direct current. The first cable assembly includes a low-voltage communication cable; 6. The power distribution device of any one of claims 1 to 5, wherein, The high-voltage power distribution unit sends CAN control instructions of the plug-in hybrid commercial vehicle chassis to the inverter through the low-voltage communication cable. The inverter includes a plurality of inverter units arranged in parallel with each other.

7. The power distribution device of claim 6, wherein, The inverter includes:

8. The power distribution device of claim 7, wherein, An input control relay arranged upstream of the circuit of the plurality of inverter units; An output protection relay arranged downstream of the circuit of the plurality of inverter units. The inverter includes:

9. The power distribution device of claim 8, wherein, An input filter unit arranged upstream of the circuit of the input control relay for reducing interference and harmonics in the input high-voltage direct current; An output filter unit arranged downstream of the circuit of the output protection relay for reducing interference and harmonics in the inverter alternating current. The inverter includes:

10. The power distribution device of claim 9, wherein, A control display unit connected to the plurality of inverter units for monitoring and displaying the working state of the inverter and receiving CAN control instructions from the plug-in hybrid commercial vehicle chassis; An auxiliary power supply unit connected in series between the input filter unit and the control display unit for providing the required low-voltage power supply for the internal components of the inverter. ​

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