A power system and a pump truck

Abstract

The application discloses a power system and a pump truck, and is applied to the pump truck. The power system comprises: a power utilization device; an energy storage device, which is electrically connected with the power utilization device, is used for storing electric energy and supplying power to the power utilization device; a range extending power generation device, which is electrically connected with the power utilization device, is used for generating power, charging the energy storage device and / or supplying power to the power utilization device; and an external power supply device, which is electrically connected with the power utilization device, is used for charging the energy storage device and / or supplying power to the power utilization device through an external power source; wherein the energy storage device, the range extending power generation device and the external power supply device are connected in parallel. The power system of the application adopts three power supply devices connected in parallel, can realize power supply schemes such as single power supply, two-to-two parallel power supply or three simultaneous parallel power supply, has high flexibility, and is beneficial to taking into account the requirements of stable power supply and cost saving.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, specifically to a power system and a pump truck. Background Technology

[0002] In the construction industry, concrete pump trucks have become indispensable equipment in infrastructure construction due to their efficient concrete delivery capabilities. Their integrated electrical systems, including mixing, pumping, and hydraulic systems, place extremely high demands on the stability and continuity of power supply. Currently, the common power supply modes for concrete pump trucks mostly rely on a single external power source or a separate range extender generator.

[0003] When relying solely on external power supplies, construction sites often face problems such as insufficient power supply and large voltage fluctuations. When the external power grid is overloaded or experiences line faults, power outages for the pump truck can easily occur, leading to serious consequences such as concrete solidification clogging pipes, construction delays, and even equipment damage and safety accidents. Using independent range extenders for power supply, however, has drawbacks such as high fuel consumption, severe noise pollution, and low power generation efficiency. Especially in long-term continuous operation scenarios, the high operating costs and environmental pressures cannot be ignored. Furthermore, traditional power supply methods lack intelligent control mechanisms and cannot dynamically adjust power supply strategies according to operating conditions, making it difficult to meet the power demands under complex working conditions and easily leading to energy waste. Therefore, existing pump truck power supply systems cannot simultaneously meet the requirements of stable power supply and cost savings. Utility Model Content

[0004] The purpose of this application is to provide a power system and a pump truck to solve the problem that the power supply system of the pump truck in the prior art cannot simultaneously meet the requirements of stable power supply and cost saving.

[0005] To achieve the above objectives, the first aspect of this application provides a power system for use in a pump truck, the power system comprising:

[0006] Electrical appliances;

[0007] An energy storage device, electrically connected to an electrical appliance, is used to store electrical energy and supply power to the electrical appliance.

[0008] Range extender generator, electrically connected to the power-consuming device, is used to generate electricity and charge the energy storage device and / or supply power to the power-consuming device;

[0009] An external power supply device, electrically connected to the electrical device, is used to charge the energy storage device and / or supply power to the electrical device via an external power source.

[0010] The energy storage device, the range extender generator, and the external power supply device are connected in parallel.

[0011] In this embodiment, the pump truck includes high-power-demand components and low-power-demand components. The electrical equipment includes: a main pump power unit for driving the high-power-demand components to perform high-power-demand operating conditions, including pumping conditions; and an auxiliary pump power unit for driving the low-power-demand components to perform low-power-demand operating conditions and / or assisting the pump truck in performing high-power-demand operating conditions, including boom operation, outrigger operation, mixing operation, and cleaning operation.

[0012] In this embodiment, the high-power-demand component includes a main pump, and the main pump power unit includes: a main pump motor, mechanically connected to the main pump, for driving the main pump to work; and a main pump motor control unit, electrically connected to the main pump motor, for controlling the main pump motor.

[0013] In this embodiment, the low-power-requirement components include a constant-pressure pump, a boom pump, and a gear pump. The auxiliary pump power unit includes: an auxiliary pump motor, which is mechanically connected to the constant-pressure pump, the boom pump, and the gear pump respectively, for driving the constant-pressure pump and / or the boom pump and / or the gear pump to work; and an auxiliary pump motor control unit, which is electrically connected to the auxiliary pump motor, for controlling the auxiliary pump motor.

[0014] In this embodiment of the application, the pump truck includes a traveling component, and the electrical device includes a traveling drive unit. The traveling drive unit includes: a drive motor, which is mechanically connected to the traveling component and is used to drive the traveling component to work; and a drive motor control unit, which is electrically connected to the drive motor and is used to control the drive motor.

[0015] In this embodiment of the application, the power system further includes: a power distribution device, which is electrically connected to the energy storage device, the range extender generator, the external power supply device, and the power consumption device, respectively, and is used to distribute the power output from the energy storage device, the range extender generator, and the external power supply device to the power consumption device.

[0016] In this embodiment of the application, the power system further includes: a charger, electrically connected to the energy storage device, for charging the energy storage device.

[0017] In this embodiment, the external power supply device includes: an external power interface for connecting to an external power source; and an on-board charging component electrically connected to the external power interface for converting AC power from the external power source into DC power.

[0018] A second aspect of this application provides a pump truck, which includes the aforementioned power system.

[0019] In this embodiment of the application, the pump truck further includes: high-power demand components, including a main pump, for performing high-power demand conditions under the drive of the power system; and low-power demand components, including a constant pressure pump, a boom pump, and a gear pump, for performing low-power demand conditions under the drive of the power system.

[0020] The above technical solution provides a power system for a concrete pump truck. This power system includes an electrical device and multiple power supply devices electrically connected to the electrical device. These power supply devices are connected in parallel and consist of an energy storage device, a range extender generator, and an external power supply device. The energy storage device stores electrical energy and supplies power to the electrical device. The range extender generator generates electricity and charges the energy storage device and / or supplies power to the electrical device. The external power supply device charges the energy storage device and / or supplies power to the electrical device via an external power source. This power system employs three parallel power supply devices, enabling power supply schemes such as individual power supply, two-to-two parallel power supply, or simultaneous parallel power supply of all three. This provides high flexibility and helps to balance the needs of stable power supply and cost savings.

[0021] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings:

[0023] Figure 1 A structural block diagram of a power system provided in an embodiment of this application;

[0024] Figure 2 A structural block diagram of a power system provided in another embodiment of this application;

[0025] Figure 3 This is a structural block diagram of a pump truck system provided in a specific embodiment of this application.

[0026] Explanation of reference numerals in the attached figures

[0027] 100 Electrical appliances 200 Energy storage devices

[0028] 300 Range Extender Generator; 400 External Power Supply Unit

[0029] 500 Power distribution unit 111 Main pump motor

[0030] 112 Main pump motor electrical control; 121 Auxiliary pump motor

[0031] 122 Auxiliary pump motor electrical control; 131 Drive motor

[0032] 132 Drive motor control unit 210 Charger

[0033] 310 External power interface; 320 Vehicle charging component Detailed Implementation

[0034] 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. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0037] Figure 1 This is a structural block diagram of a power system provided in an embodiment of this application. Figure 1 As shown in the figure, this application provides a power system for use in a pump truck, which may include:

[0038] 100 electrical appliances;

[0039] The energy storage device 200 is electrically connected to the electrical device 100 and is used to store electrical energy and supply power to the electrical device 100.

[0040] The range extender generator 300 is electrically connected to the power consumption device 100, used to generate electricity and charge the energy storage device 200 and / or supply power to the power consumption device 100.

[0041] An external power supply device 400 is electrically connected to the power-consuming device 100 and is used to charge the energy storage device 200 and / or supply power to the power-consuming device 100 through an external power source.

[0042] Among them, the energy storage device 200, the range extender generator 300, and the external power supply device 400 are connected in parallel.

[0043] In this embodiment, a power system for a pump truck is provided to provide kinetic energy for various operating conditions of the pump truck. Specifically, the power system may include an electrical device 100 and multiple power supply devices electrically connected to the electrical device 100. The multiple power supply devices are connected in parallel to achieve parallel power supply to the electrical device 100. The electrical device 100 refers to all the equipment on the pump truck that consumes electrical energy, including the device that drives the pump truck's actuator and other power-consuming components. The device that drives the pump truck's actuator includes motor control and motors, such as main pump motor control 112, main pump motor 111, auxiliary pump motor control 122, auxiliary pump motor 121, drive motor control 132, and drive motor 131, etc. Other power-consuming components include DC-DC converters (DC-DC converters) and air conditioners. DC-DC converters are used to convert high-voltage electricity into 24V low-voltage electricity to charge low-voltage batteries or drive low-voltage electrical equipment. Air conditioners are used to convert high-voltage electrical energy into heat energy to cool or heat the cab.

[0044] Furthermore, the multiple power supply devices are energy storage device 200, range extender generator 300, and external power supply device 400, which are connected in parallel. Energy storage device 200 is typically a large-capacity battery pack or supercapacitor, possessing both energy storage and discharge capabilities. It can be charged by range extender generator 300 or external power supply device 400, or it can independently power the electrical device 100 or work in conjunction with other power supply devices. Range extender generator 300 is an independent power generation system, which can be a combination of a range extender and its electronic control unit, or a range extender generator such as a hydrogen fuel cell. It is used to start generating electricity when there is no external power source or insufficient energy storage, directly powering the electrical device 100 or charging energy storage device 200. It can also work in conjunction with external power supply device 400 and energy storage device 200 to provide power, solving the problem of continuous power supply for the pump truck during mobile operations. The external power supply device 400 mainly includes a charging interface and a conversion circuit, used to connect to an external fixed power source, such as a construction site power grid and charging piles. It can supplement the system with electrical energy when the pump truck is stationary or when external conditions are available, thereby reducing fuel consumption, or it can work in conjunction with the range extender generator 300 and the energy storage device 200 to supply power to the electrical device 100. It can be understood that in the embodiments of this application, the energy storage device 200, the range extender generator 300, and the external power supply device 400 form a parallel power channel, which can supply power to the electrical device 100 simultaneously or independently without interfering with each other. They can be connected in parallel in pairs or in all three. The excess electrical energy of the range extender generator 300 or the external power supply device 400 can be stored in the energy storage device 200.

[0045] Thus, the power system of this application, through a parallel architecture of multiple power supply devices, can automatically switch power supply modes according to working conditions, avoiding the limitations of a single power source. It can meet the power supply needs of the pump truck in different operating scenarios, whether it's fixed operations powered by the urban power grid, mobile operations in the field without power, or emergency operations in extreme environments, all can be guaranteed by combining multiple power sources. Furthermore, the parallel architecture ensures that if any one power source fails, the others can seamlessly take over, avoiding construction delays caused by power outages. Therefore, compared with traditional pump truck power supply systems, the power system of this application solves the power supply problem of pump trucks in different operating scenarios, combining stability and economy. The above technical solution provides a power system for a concrete pump truck. This power system includes an electrical device and multiple power supply devices electrically connected to the electrical device. These power supply devices are connected in parallel and consist of an energy storage device, a range extender generator, and an external power supply device. The energy storage device stores electrical energy and supplies power to the electrical device. The range extender generator generates electricity and charges the energy storage device and / or supplies power to the electrical device. The external power supply device charges the energy storage device and / or supplies power to the electrical device via an external power source. This power system employs three parallel power supply devices, enabling power supply schemes such as individual power supply, two-to-two parallel power supply, or simultaneous parallel power supply of all three. This provides high flexibility and helps to balance the needs of stable power supply and cost savings.

[0046] Figure 2 This is a structural block diagram of a power system provided for another embodiment of this application. (See diagram below.) Figure 2 As shown in the embodiments of this application, the pump truck may include high-power demand components and low-power demand components. The electrical device 100 may include: a main pump power unit for driving the high-power demand components to perform high-power demand conditions, including pumping conditions; and an auxiliary pump power unit for driving the low-power demand components to perform low-power demand conditions and / or assisting the pump truck in performing high-power demand conditions, including boom conditions, outrigger conditions, mixing conditions, and cleaning conditions.

[0047] It can be understood that high-power-demand components refer to the core actuators in a concrete pump truck that consume a large amount of electrical energy during operation and have extremely high requirements for the continuity and stability of power output. These mainly refer to the pumping system, including the main hydraulic pump and concrete pumping cylinders. Low-power-demand components refer to the actuators that assist the pump truck in performing non-core operations such as preparation, adjustment, and maintenance. Their power requirements are significantly lower than the main system, including the boom system, outrigger system, mixing system, and cleaning system. The operating conditions of a pump truck can be divided into high-power-demand conditions and low-power-demand conditions based on different power requirements. High-power-demand conditions are the pumping conditions, used to transport concrete along pipelines to designated locations. Low-power-demand conditions include boom conditions, outrigger conditions, mixing conditions, and cleaning conditions. The boom operation includes controlling the extension, retraction, and rotation of the boom to adjust the concrete placement position; the outrigger operation includes extending or retracting the outriggers to stabilize the vehicle and ensure smooth mechanical operation during pumping; the mixing operation includes maintaining the uniformity of the concrete in the hopper through mixing to prevent solidification; and the cleaning operation includes cleaning the pumping pipes and hopper to avoid hardened concrete residue.

[0048] Traditional pump truck power supply systems rely on a single motor to drive all the pump units mounted on the truck. This results in all pump units idling regardless of the operating conditions, leading to unnecessary energy consumption and significantly reducing operational efficiency. To address this, this application's embodiment employs a distributed drive architecture based on power requirements, dividing the power units mounted on the pump truck into main pump power units and auxiliary pump power units to reduce unnecessary energy consumption.

[0049] Specifically, the auxiliary pump power unit is used to drive low-power demand components on the pump truck to perform low-power demand operations, and can also provide auxiliary power when the pump truck is performing high-power demand operations. The main pump power unit is only used to drive high-power demand components to perform pumping operations, and the main pump unit does not need to participate when the pump truck is performing low-power operations, so as to reduce unnecessary energy consumption.

[0050] like Figure 2 As shown in the embodiment of this application, the high-power demand component includes a main pump, and the main pump power unit may include: a main pump motor 111, which is mechanically connected to the main pump and is used to drive the main pump to work; and a main pump motor control unit 112, which is electrically connected to the main pump motor 111 and is used to control the main pump motor 111.

[0051] It is understood that the main pump is the core mechanical component of the pump truck when performing pumping operations. Its main function is to transport materials such as concrete to the construction site under high pressure through pipelines, primarily referring to the main hydraulic pump. Traditional hydraulic drives mainly use a combination of a fuel engine and a hydraulic pump. The fuel engine requires multiple energy conversion stages: "engine → hydraulic pump → hydraulic oil → hydraulic motor → main pump," resulting in high energy loss. Furthermore, the hydraulic system suffers from problems such as oil leakage and overheating. Therefore, in this embodiment, the main pump power unit adopts an electric drive scheme combining a motor and electronic control.

[0052] Specifically, the main pump power unit includes a main pump motor control unit 112 and a main pump motor 111. The main pump motor control unit 112 controls the speed, torque, and operating status of the main pump motor 111, and receives commands from the upper-level system to dynamically adjust the output power. The main pump motor 111 is mechanically connected to the main pump, converting electrical energy into mechanical energy to drive the main pump's rotation. The main pump motor 111 can be a permanent magnet synchronous motor or an asynchronous motor, etc. Thus, this direct-drive motor solution eliminates the intermediate links in the hydraulic system, significantly improving energy conversion efficiency and increasing economic benefits.

[0053] like Figure 2 As shown in the embodiment of this application, the low-power-requirement components include a constant-pressure pump, a boom pump, and a gear pump. The auxiliary pump power unit may include: an auxiliary pump motor 121, which is mechanically connected to the constant-pressure pump, the boom pump, and the gear pump respectively, for driving the constant-pressure pump and / or the boom pump and / or the gear pump to work; and an auxiliary pump motor control unit 122, which is electrically connected to the auxiliary pump motor 121, for controlling the auxiliary pump motor 121.

[0054] It is understandable that a constant pressure pump is used to provide a constant pressure of oil to the hydraulic system of the pump truck, maintaining the system in standby mode (such as maintaining pipeline pressure when pumping is paused) or driving low-load equipment (such as cooling fans). A boom pump is used to drive the extension, retraction, and rotation of the boom system, enabling adjustment of the concrete placement position. A gear pump is used for outrigger deployment or retraction, mixing operations, and cleaning operations.

[0055] In traditional solutions, low-power pumps are typically driven by the main hydraulic system, meaning they share the same engine or hydraulic pump as the main pump. Even under low-load conditions, the engine still needs to maintain a high speed, resulting in high energy consumption under low load. To address this, the auxiliary pump power unit in this application adopts an integrated design of a single motor driving multiple pumps to reduce the overall energy consumption of the system.

[0056] Specifically, the auxiliary pump power unit includes an auxiliary pump motor control unit 122 and an auxiliary pump motor 121. The auxiliary pump motor 121 can be connected to a constant pressure pump, a boom pump, and a gear pump simultaneously via a transmission mechanism, such as a gearbox or coupling. This allows it to switch between driving the target pump or drive multiple pumps simultaneously according to operating conditions, enabling the pump truck to perform corresponding tasks. The auxiliary pump motor control unit 122 is electrically connected to the auxiliary pump motor 121 and controls the motor speed, torque, and pump group switching logic of the auxiliary pump motor 121. In one example, the auxiliary pump motor control unit 122 can also receive commands from the central controller to dynamically allocate power to different pumps. Thus, under low-power demand conditions, the auxiliary pump motor 121 directly drives low-power demand components, while the main pump remains unaffected, significantly reducing the overall energy consumption of the system.

[0057] Preferably, under low-power conditions, the auxiliary pump motor 121 can be directly powered by the energy storage device 200 to avoid starting the range extender. In this way, fuel consumption can be saved by pure electric drive under low-power demand conditions, resulting in significant energy saving. Moreover, the motor drive does not require hydraulic oil replacement, making it easier to maintain and reducing maintenance costs.

[0058] like Figure 2 As shown in the embodiment of this application, the pump truck includes a traveling component, and the electrical device 100 includes a traveling drive unit. The traveling drive unit may include: a drive motor 131, which is mechanically connected to the traveling component and is used to drive the traveling component to work; and a drive motor control unit 132, which is electrically connected to the drive motor 131 and is used to control the drive motor 131.

[0059] It is understood that the driving components are the core components for the pump truck to achieve mobile relocation, including wheels, axles, gearbox, and drive shaft. In this embodiment, the driving unit uses a combination of a drive motor control unit 132 and a drive motor 131, replacing the traditional diesel engine and gearbox transmission system. Specifically, the drive motor 131 is mechanically connected to the driving components, converting electrical energy into driving force to power the driving components. The drive motor control unit 132 controls the speed, torque, and operating mode of the drive motor 131, including forward, reverse, and idle modes. Compared to traditional diesel drive systems, the electric drive architecture used in this application eliminates multiple traditional stages, improves energy conversion efficiency, and saves system energy consumption.

[0060] In this embodiment of the application, the power system may further include: a power distribution device 500, which is electrically connected to the energy storage device 200, the range extender generator 300, the external power supply device 400 and the power consumption device 100, respectively, for distributing the power output from the energy storage device 200, the range extender generator 300 and the external power supply device 400 to the power consumption device 100.

[0061] It is understood that since the power system in this application includes multiple power supply devices, and the traditional single power supply control method cannot be applied to the power system of this application, in order to meet the dynamically changing power demand during the operation of the pump truck, the power system of this application also includes a power distribution device 500, which is used to coordinate the energy flow between the three major power sources, namely the energy storage device 200, the range extender generator 300, and the external power supply device 400, and the power consumption device 100.

[0062] In one example, the power distribution unit 500 can allocate power to multiple power supply devices according to a preset priority. For example, the priority can be ranked based on cost and environmental protection: external power supply > energy storage device 200 > range extender generator 300. When an external power supply is connected, the power distribution unit 500 forces the grid to supply power and charges the energy storage device 200, completely cutting off the energy consumption of the range extender. This helps improve system energy efficiency.

[0063] like Figure 2 As shown in the embodiments of this application, the power system may further include: a charger 210, which is electrically connected to the energy storage device 200 and is used to charge the energy storage device 200.

[0064] Specifically, the power system may also include a charger 210 electrically connected to the energy storage device 200, which can charge the energy storage device 200 when the pump truck is not in operation.

[0065] like Figure 2 As shown in the embodiment of this application, the external power supply device 400 may include: an external power interface 310 for connecting to an external power source; and an on-board charging component 320, electrically connected to the external power interface 310, for converting the AC power from the external power source into DC power.

[0066] Specifically, the external power supply device 400 consists of an external power interface 310 and an on-board charging component 320. The external power supply device 400 refers to the physical connection point between the pump truck and the external fixed power source, and is responsible for power input and communication interaction. The on-board charging component 320 is used to convert the AC power from the external power source into a suitable DC power source to achieve intelligent control and safety protection in the power supply process.

[0067] This application also provides a pump truck, which includes the power system described in the above embodiments.

[0068] In this embodiment of the application, the pump truck may further include: high-power demand components, including a main pump, for performing high-power demand conditions under the drive of the power system; and low-power demand components, including a constant pressure pump, a boom pump, and a gear pump, for performing low-power demand conditions under the drive of the power system.

[0069] It is understandable that high-power demand components refer to the core actuators in a pump truck that consume a large amount of electrical energy during operation and have extremely high requirements for the continuity and stability of power output. The main pump is the core mechanical component of the pump truck that performs pumping operations. Its main function is to transport materials such as concrete to the construction site under high pressure through pipelines. The main pump is the main hydraulic pump.

[0070] Low-power-requirement components refer to actuators that assist the pump truck in performing non-core operations such as preparation, adjustment, and maintenance. Their power requirements are significantly lower than the main system. These include the boom system, outrigger system, mixing system, and cleaning system, such as constant-pressure pumps, boom pumps, and gear pumps. They are used to perform low-power-requirement operations under the drive of the power system. Constant-pressure pumps provide a constant pressure of oil to the pump truck's hydraulic system to maintain system standby (e.g., maintaining pipeline pressure when pumping is paused) or drive low-load equipment (e.g., cooling fans). Boom pumps drive the extension, retraction, and rotation of the boom system to adjust the concrete placement position. Gear pumps are used to perform outrigger deployment or retraction, mixing, and cleaning operations.

[0071] Pump truck operating conditions can be categorized into high-power-demand conditions and low-power-demand conditions based on varying power requirements. High-power-demand conditions are primarily pumping conditions, including delivering concrete along pipelines to designated locations. Low-power-demand conditions include boom operation, outrigger operation, mixing operation, and cleaning operation. Boom operation involves controlling the extension, retraction, and rotation of the boom to adjust the concrete placement position; outrigger operation involves deploying or retracting the outriggers to stabilize the truck body and ensure smooth pumping; mixing operation involves maintaining the uniformity of concrete within the hopper through mixing to prevent solidification; and cleaning operation involves cleaning the pumping pipeline and hopper to prevent hardened concrete residue.

[0072] Figure 3 This is a structural block diagram of a pump truck system provided in a specific embodiment of this application. Figure 3 As shown, the system includes multiple power supply units: an external power supply unit consisting of 380V industrial electricity and an OBC (On-Board Charger); a range extender and its electronic control unit; and an energy storage unit consisting of a power battery and a fast-charging socket. These power supply units are connected to a power distribution device, which coordinates and distributes the output power to the pump truck's electrical components. Figure 3 As shown, the electrical components include a main pump unit, an auxiliary pump unit, a drive unit, a DC-DC converter, and an air conditioner. The main pump unit includes a main pump motor control unit, a main pump motor, and the main pump itself; the auxiliary pump unit includes an auxiliary pump motor control unit, an auxiliary pump motor, a constant pressure pump, a boom pump, and a gear pump; the drive unit includes a drive motor control unit, a drive motor, a gearbox, and a drive shaft. Figure 3As shown, the pump truck also includes a control system, which is responsible for managing the overall vehicle mode and controlling the execution of specific actions. The connection relationships and functions of the above components are detailed in the above implementation method and will not be repeated here.

[0073] In summary, compared to traditional pump trucks where the engine is mechanically connected to the pump unit or drive shaft during operation or travel, and where the engine's operation is affected by load (load fluctuations, engine operating point fluctuations), the range-extended hybrid architecture adopted in this application allows the engine to generate electricity at a fixed point during operation or travel, ensuring a stable working area. Furthermore, in traditional pump trucks, the engine directly drives the pump unit, and engine start-stop is strongly correlated with operating conditions; whereas the range-extended pump truck of this application operates via an electric motor, with the engine only providing electricity, allowing for flexible start-stop functionality and enabling start-stop strategies based on energy-saving considerations.

[0074] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0075] The above are merely embodiments of this application and are not intended to limit the scope of 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 scope of the claims of this application.

Claims

1. A power system, characterized in that, The power system, applied to pump trucks, includes: Electrical appliances; An energy storage device, electrically connected to the electrical device, is used to store electrical energy and supply power to the electrical device; A range extender generator is electrically connected to the electrical device and is used to generate electricity, charge the energy storage device, and / or supply power to the electrical device. An external power supply device is electrically connected to the electrical device and is used to charge the energy storage device and / or supply power to the electrical device through an external power source. The energy storage device, the range extender generator, and the external power supply device are connected in parallel.

2. The power system according to claim 1, characterized in that, The pump truck includes high-power-demand components and low-power-demand components, and the electrical equipment includes: The main pump power unit is used to drive the high-power demand components to perform high-power demand conditions, including pumping conditions. The auxiliary pump power unit is used to drive the low-power demand components to perform low-power demand conditions and / or assist the pump truck in performing high-power demand conditions. The low-power demand conditions include boom operation, outrigger operation, mixing operation, and cleaning operation.

3. The power system according to claim 2, characterized in that, The high-power-demand component includes a main pump, and the main pump power unit includes: The main pump motor is mechanically connected to the main pump and is used to drive the main pump to work; The main pump motor control is electrically connected to the main pump motor and is used to control the main pump motor.

4. The power system according to claim 3, characterized in that, The low-power-requirement components include a constant-pressure pump, a boom pump, and a gear pump, and the auxiliary pump power unit includes: An auxiliary pump motor is mechanically connected to the constant pressure pump, the boom pump, and the gear pump, respectively, and is used to drive the constant pressure pump and / or the boom pump and / or the gear pump to work; An auxiliary pump motor control unit is electrically connected to the auxiliary pump motor and is used to control the auxiliary pump motor.

5. The power system according to claim 4, characterized in that, The pump truck includes a traveling component, and the electrical device includes a travel drive unit, which includes: A drive motor, mechanically connected to the traveling component, is used to drive the traveling component to work; The drive motor control is electrically connected to the drive motor and is used to control the drive motor.

6. The power system according to claim 5, characterized in that, The power system also includes: The power distribution device is electrically connected to the energy storage device, the range extender generator, the external power supply device, and the power consumption device, respectively, and is used to distribute the power output from the energy storage device, the range extender generator, and the external power supply device to the power consumption device.

7. The power system according to claim 1, characterized in that, The power system also includes: A charger, electrically connected to the energy storage device, is used to charge the energy storage device.

8. The power system according to claim 1, characterized in that, The external power supply device includes: External power interface, used to connect an external power source; The vehicle-mounted charging component is electrically connected to the external power supply interface and is used to convert the AC power from the external power supply into DC power.

9. A pump truck, characterized in that, The pump truck includes: The power system according to any one of claims 1 to 8.

10. The pump truck according to claim 9, characterized in that, The pump truck also includes: High-power-demand components, including a main pump, are used to perform high-power-demand operating conditions under the drive of the power system; Low-power-demand components, including constant-pressure pumps, boom pumps, and gear pumps, are used to perform low-power-demand operations under the drive of the power system.

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