Instrument car and instrument car power supply management method

Abstract

The application relates to the technical field of vehicles and discloses an instrument vehicle and a power supply management method thereof, the instrument vehicle comprising a vehicle-mounted device, a driving motor, a chassis, a vehicle cabin and a power supply management system, the driving motor being used for driving the instrument vehicle to travel. A range extender and a power battery are mounted on the chassis, the range extender is electrically connected with the power battery, and the power battery is electrically connected with the driving motor and the vehicle-mounted device. The vehicle cabin is provided with an external power supply device, the external power supply device is electrically connected with the vehicle-mounted device, and the external power supply device is provided with an interface for connecting commercial power. The range extender, the power battery and the external power supply device are all electrically connected with the power supply management system. The range extender and the power battery are multiplexed in travel working conditions and operation working conditions, so that the mechanical complexity and the maintenance cost of the instrument vehicle are reduced. The power supply management system can identify the working condition of the instrument vehicle and adjust the power supply object of the power battery, so that the intelligent degree of the instrument vehicle is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to an instrument vehicle and a method for managing the power supply of the instrument vehicle. Background Technology

[0002] Instrument vehicles are crucial equipment for oil and gas extraction and production enhancement, belonging to the category of specialized vehicles for oil and gas well operations. Their main function is to carry control terminals and data acquisition and processing systems, enabling real-time monitoring and remote control of well site operations such as cementing, fracturing, acidizing, and sand control. They serve as the control core of complete fracturing equipment systems in shale gas, coalbed methane, and other oil and gas fields.

[0003] An instrument vehicle typically includes a chassis engine and a diesel generator. The instrument vehicle is driven by the fuel engine, and the onboard equipment is powered by the diesel generator.

[0004] However, the vehicle is equipped with two independent power systems: a chassis engine and a diesel generator. This results in high mechanical complexity, high maintenance costs, and low intelligence in the instrument vehicle. Summary of the Invention

[0005] This invention provides an instrument vehicle and an instrument vehicle power supply management method to solve the problems of high mechanical complexity, high maintenance cost, and low level of intelligence of the instrument vehicle.

[0006] In a first aspect, the present invention provides an instrument vehicle, comprising: Vehicle-mounted equipment; A drive motor, the drive motor being used to drive the instrument vehicle; A chassis on which a range extender and a power battery are mounted, the range extender being electrically connected to the power battery, and the power battery being electrically connected to the drive motor and the on-board equipment; The carriage has an external power supply device that is electrically connected to the on-board equipment and has an interface for connecting to mains power. The power management system includes the range extender, the power battery, and the external power supply device, all of which are electrically connected to the power management system.

[0007] Beneficial effects: When the instrument vehicle is in driving condition, because the chassis is equipped with a range extender and a power battery, the range extender is electrically connected to the power battery, and the power battery is electrically connected to the drive motor. This allows the range extender to charge the power battery, and the power battery to provide power to the drive motor, so that the drive motor can drive the wheels of the instrument vehicle to rotate, thus enabling the instrument vehicle to move.

[0008] When the instrument vehicle is in operation, without mains power, the power battery, electrically connected to the onboard equipment, can provide power to the equipment. When mains power is available, an external power supply unit within the vehicle compartment, with an interface for connecting to mains power and electrically connected to the onboard equipment, allows mains power to be supplied to the equipment. This enables the range extender and power battery to be reused in both driving and operational conditions, reducing the mechanical complexity and maintenance costs of the instrument vehicle.

[0009] Since the range extender, power battery, and external power supply are all electrically connected to the power management system, the system can identify the operating conditions of the instrument vehicle and adjust the power supply target of the power battery to improve the intelligence level of the instrument vehicle.

[0010] In one alternative embodiment, the carriage also includes an on-board power supply device, which includes an inverter. The input terminal of the inverter is connected to the power battery, and the output terminal of the inverter is connected to the vehicle-mounted equipment.

[0011] Beneficial effects: The power battery outputs direct current, which can be converted into alternating current by an inverter to match the voltage required by the vehicle equipment.

[0012] In one optional embodiment, the vehicle power supply device further includes an uninterruptible power supply, the uninterruptible power supply having a DC voltage input terminal, a first AC voltage input terminal, a second AC voltage input terminal, and an AC voltage output terminal; The DC voltage input terminal is connected to the power battery, the first AC voltage input terminal is connected to the output terminal of the inverter, the second AC voltage input terminal is connected to the external power supply device, and the AC voltage output terminal is connected to the core equipment. The non-core equipment is electrically connected to the inverter and the external power supply device; The core equipment includes one or more of the following: fracturing control system, sand mixing control system, data acquisition system, and well site monitoring system. Non-core equipment includes one or more of the following: air conditioning, heaters, and lighting equipment.

[0013] Beneficial effects: When the mains power supply is supplying the core equipment, in the event of a sudden power outage, by setting up an uninterruptible power supply between the power battery and the core equipment, the power supply can be supplied during the switching process between mains power supply and power battery power supply, thereby achieving power outage protection and ensuring that the equipment does not restart and the data is not lost.

[0014] In one alternative embodiment, the instrument vehicle further includes a speed sensor mounted on the wheels of the instrument vehicle to detect the speed of the wheels; The speed sensor is electrically connected to the power management system.

[0015] Beneficial effects: Because the speed sensor is mounted on the wheel, it can detect the wheel's rotational speed and convert it into an electrical signal. Since the speed sensor is electrically connected to the power management system, the system can receive the signal and determine whether the instrument vehicle is in a driving or working condition. For example, if the speed sensor detects a non-zero speed, the instrument vehicle is moving, and the power management system identifies it as being in a driving condition. If the sensor detects a zero speed, the instrument vehicle is stationary, and the system identifies it as being in a working condition.

[0016] The present invention also provides a power supply management method for an instrument vehicle, comprising the following steps: Acquire the status information of the instrument vehicle and identify the operating condition of the instrument vehicle based on the status information; When the operating condition is driving, the drive motor is powered by the power battery; When the vehicle is in operation, the on-board equipment is powered by mains power or the power battery.

[0017] Beneficial effects: When the instrument vehicle is in driving condition, the power battery can provide power to the drive motor, so that the drive motor can drive the wheels of the instrument vehicle to rotate, thus realizing the movement of the instrument vehicle.

[0018] When the instrument vehicle is in working condition, the on-board equipment is powered by mains power or power battery, so that the range extender and power battery can be reused in driving and working conditions, reducing the mechanical complexity and maintenance cost of the instrument vehicle.

[0019] In one optional implementation, the step of supplying power to the vehicle-mounted equipment via mains power or a power battery when the operating condition is a working condition includes: When there is an external mains power supply, the on-board equipment is powered by the mains power. When there is no external mains power, the on-board equipment is powered by the power battery.

[0020] Beneficial effects: Depending on whether there is an external mains power supply, the instrument vehicle can be powered by either mains power or a power battery, so that it can work normally in scenarios with or without mains power, thus improving the instrument vehicle's scenario compatibility.

[0021] In one optional implementation, the step of supplying power to the vehicle-mounted equipment via a power battery when there is no external mains power supply further includes: When the charge of the power battery is not greater than a set threshold, the range extender charges the power battery and supplies power to the on-board equipment.

[0022] Beneficial effects: When powered by the main battery, if the battery charge is greater than a set threshold, the main battery supplies power to the on-board equipment. As the on-board equipment's charge increases, the battery charge gradually decreases. When the battery charge is less than or equal to the set threshold, the range extender supplies power to the on-board equipment and charges the main battery, preventing the on-board equipment from becoming unusable due to battery depletion. Furthermore, setting the threshold prevents over-discharge of the main battery, thereby extending its lifespan.

[0023] In one optional implementation, the step of supplying power to the vehicle-mounted equipment via mains power when external mains power is available further includes: After the mains power supply is interrupted, the power supply to the vehicle equipment is switched to the power battery within a set time. During the set time period, the vehicle-mounted equipment is powered by an uninterruptible power supply.

[0024] Beneficial effects: When powering vehicle-mounted equipment via mains power, sudden power outages may occur due to the uncontrollability of mains power, causing a disruption in mains power supply. In such cases, the power supply mode can be switched to the power battery to power the vehicle-mounted equipment within a set time to avoid affecting the normal operation of the vehicle-mounted equipment.

[0025] By setting up an uninterruptible power supply between the power battery and the core equipment, power can be supplied through the uninterruptible power supply during the switching between mains power supply and power battery power supply, thereby achieving power failure protection and ensuring that the on-board equipment does not restart and the data is not lost.

[0026] In one optional implementation, the step of supplying power to the vehicle-mounted equipment via mains power when external mains power is available further includes: When the instrument vehicle is in a stopped state, the power battery is charged by the mains power.

[0027] Beneficial effects: The shutdown condition can be the state when the instrument vehicle is not in operation or is paused and not moving. At this time, the power battery can be charged by the mains power to ensure that the power battery has sufficient power. Compared with charging the power battery by the range extender, the power of the mains power comes from the grid, which has low operating costs and the charging process is quiet and smokeless.

[0028] In one optional implementation, acquiring the status information of the instrument vehicle and identifying the operating condition of the instrument vehicle based on the status information includes: The status information includes the wheel rotation speed signal; The rotational speed signal of the wheel is obtained by a rotational speed sensor installed on the wheel; When the speed signal is not zero, the instrument vehicle is in driving condition; when the speed signal is zero, the instrument vehicle is in working condition.

[0029] Beneficial effects: Because the speed sensor is mounted on the wheel, it can detect the wheel's rotational speed and convert it into an electrical signal. Since the speed sensor is electrically connected to the power management system, the system can receive this signal and determine whether the instrument vehicle is in a driving or working condition. For example, if the speed sensor detects a non-zero speed, the instrument vehicle is moving, and the power management system identifies it as being in a driving condition. If the speed sensor detects a zero speed, the instrument vehicle is stationary, and the power management system identifies it as being in a working condition. This electrical connection between the speed sensor and the power management system further enhances the instrument vehicle's intelligence. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of an instrument vehicle according to an embodiment of the present invention; Figure 2 This is a power supply management architecture diagram of an instrument vehicle according to an embodiment of the present invention; Figure 3 This is a flowchart illustrating a power management method for an instrument vehicle under driving conditions, according to an embodiment of the present invention. Figure 4 This is a flowchart illustrating a power management method for an instrument vehicle under operating conditions, according to an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures: 10. Chassis; 11. Range extender; 12. Power battery; 20. Carriage; 21. Onboard power supply unit; 211. Inverter; 212. Uninterruptible power supply; 30. Vehicle-mounted equipment; 31. Core equipment; 32. Non-core equipment; 40. Drive motor; 50. Power Management System; 60. External power supply device. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The related technologies suffer from technical problems such as high mechanical complexity, high maintenance costs, and low level of intelligence in instrument vehicles. This is because the two independent power systems—the chassis engine and the diesel generator—increase mechanical complexity and maintenance costs. Furthermore, the two power systems operate independently, making it impossible to supply power from the chassis engine to electrical equipment or from the diesel generator to power the instrument vehicle, thus resulting in low intelligence.

[0035] To address the aforementioned technical problems, this invention provides an instrument vehicle and its power supply management method. By installing a range extender and a power battery on the chassis, the instrument vehicle can be powered during driving. During operational conditions, the power battery can supply power to onboard equipment, and it can also receive AC power from an external power source and supply it to the onboard equipment. This allows for the reuse of the range extender and power battery in both driving and operational conditions, reducing the mechanical complexity and maintenance costs of the instrument vehicle. The power management system can identify the instrument vehicle's operational condition and adjust the power supply to the appropriate source, thereby enhancing the instrument vehicle's intelligence.

[0036] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0037] According to an embodiment of the present invention, in one aspect, an instrument vehicle is provided, with reference to... Figure 1 and Figure 2 The instrument vehicle includes a chassis 10, a cargo box 20, onboard equipment 30, a drive motor 40, and a power management system 50. The cargo box 20 can be mounted on the chassis 10, and its bottom may have wheels. The onboard equipment 30 can be installed inside the cargo box 20 and may include core equipment 31 and non-core equipment 32. The core equipment 31 is an indispensable electrical device for oil and gas extraction and production enhancement. The core equipment 31 may include one or more of the following: fracturing control system, sand mixing control system, data acquisition system, and well site monitoring system. The non-core equipment 32 is the electrical device in the onboard equipment 30 other than the core equipment 31. The non-core equipment 32 may include one or more of the following: air conditioning, heaters, lighting equipment, and other environmental equipment.

[0038] The drive motor 40 is used to drive the instrument vehicle. The drive motor 40 can be connected to the wheels of the instrument vehicle to drive the wheels to rotate, thereby driving the instrument vehicle. A reducer can be connected between the drive motor 40 and the wheels of the instrument vehicle to reduce the output speed of the drive motor 40 and increase the output torque of the drive motor 40, so as to match the high speed and low torque characteristics of the drive motor 40 with the low speed and high torque requirements of the wheels.

[0039] refer to Figure 1 and Figure 2 A range extender 11 and a power battery 12 are mounted on the chassis 10. The range extender 11 and the power battery 12 are electrically connected. The range extender 11 is an on-board auxiliary power generation system. The range extender 11 may include an engine and a generator. The engine is connected to the generator, and the generator is connected to the power battery. The engine burns fuel to generate mechanical energy, and the generator converts the mechanical energy into electrical energy. The electrical energy can be supplied to the power battery 12 to charge it, and the electrical energy can also be directly supplied to the drive motor 40 or the on-board equipment 30. The engine can be a diesel engine or a gasoline engine.

[0040] The power battery 12 is a power supply device in the instrument vehicle, capable of storing, outputting, and charging electrical energy. When the instrument vehicle is in driving mode, the power management system 50 controls the power battery 12 to supply power to the drive motor 40, which in turn drives the wheels to move the instrument vehicle. If the power battery 12 is low on power, the main output power of the range extender 11 can be directly supplied to the drive motor 40, and the remaining output power can be output to the power battery 12 to charge it. An inverter can be installed between the power battery 12 and the drive motor 40 to convert the DC power output from the power battery 12 into AC power required by the drive motor 40.

[0041] When the instrument vehicle is in operation, refer to Figure 3 The power management system 50 controls the power battery 12 to supply power to the on-board equipment 30 so that the instrument vehicle can operate normally.

[0042] The carriage 20 has an external power supply device 60, which is another power supply device in the instrument vehicle. The external power supply device 60 has an interface for connecting to the mains power. Through this interface, the mains power can be connected to the external power supply device 60. The external power supply device 60 is electrically connected to the on-board equipment 30. For example, the external power supply device 60 and the on-board equipment 30 are connected by a cable or wire, so that in an environment with external mains power, it can be powered by the mains power.

[0043] refer to Figure 4When the instrument vehicle is in driving condition, since the chassis 10 is equipped with a range extender 11 and a power battery 12, the range extender 11 is electrically connected to the power battery 12, and the power battery 12 is electrically connected to the drive motor 40. This allows the range extender 11 to charge the power battery 12, and the power battery 12 to provide power to the drive motor 40, so that the drive motor 40 can drive the wheels of the instrument vehicle to rotate, thus realizing the driving of the instrument vehicle.

[0044] When the instrument vehicle is in operation, without mains power, the power battery 12 is electrically connected to the on-board equipment 30, enabling the power battery 12 to provide power to the on-board equipment 30. When mains power is available, the vehicle compartment 20 has an external power supply device 60 with an interface for connecting to mains power, and the external power supply device 60 is electrically connected to the on-board equipment 30, allowing mains power to be supplied to the on-board equipment 30. This enables the range extender 11 and the power battery 12 to be reused in both driving and operating conditions, reducing the mechanical complexity and maintenance costs of the instrument vehicle.

[0045] Since the range extender 11, the power battery 12 and the external power supply device 60 are all electrically connected to the power management system 50, the system can identify the operating conditions of the instrument vehicle and adjust the power supply target of the power battery 12 to improve the intelligence level of the instrument vehicle.

[0046] In one embodiment, reference Figure 1 and Figure 2 The carriage 20 also has an on-board power supply unit 21, which includes an inverter 211.

[0047] The input terminal of inverter 211 is connected to power battery 12, and the output terminal of inverter 211 is connected to vehicle equipment 30. The output of power battery 12 is DC power, which can be converted to AC power by inverter 211. Inverter 211 can convert the DC output of power battery 12 into AC power that matches vehicle equipment 30.

[0048] In one embodiment, reference Figures 1-4 The vehicle-mounted equipment 30 includes core equipment 31 and non-core equipment 32. The core equipment 31 may include one or more of the fracturing control system, sand mixing control system, data acquisition system, and well site monitoring system, while the non-core equipment 32 may include one or more of environmental equipment such as air conditioning, heaters, and lighting equipment.

[0049] refer to Figure 1 , Figure 2 and Figure 4The vehicle-mounted power supply unit 21 also includes an uninterruptible power supply (UPS) 212, which has a DC voltage input terminal, an AC voltage input terminal, and an AC voltage output terminal. When the AC voltage input terminal of the UPS 212 is connected to AC power, the UPS 212 acts as a voltage regulator. When the DC voltage input terminal of the UPS 212 is connected to DC power, the UPS 212 provides temporary power to the core equipment 31.

[0050] When the instrument vehicle is operating without external mains power, the power management system 50 controls the power battery 12 to supply power to the on-board equipment 30. The output of the power battery 12 is converted by the inverter 211 and then supplied to the on-board equipment 30. The inverter 211 may have a first output interface and a second output interface. The first output interface is connected to the non-core equipment 32 to supply power to the non-core equipment 32. The second output interface is connected to the AC voltage input terminal of the uninterruptible power supply 212. The AC voltage output terminal of the uninterruptible power supply 212 is connected to the core equipment 31, and the output of the power battery 12 is regulated by the uninterruptible power supply 212 and then supplied to the core equipment 31.

[0051] As power supply continues, the charge of the power battery 12 gradually decreases. When the charge of the power battery 12 is no greater than a set threshold (i.e., less than or equal to the set threshold), the power management system 50 controls the range extender 11 to start, directly supplying the main output power of the range extender 11 to the on-board equipment 30, and outputting the remaining output power to the power battery 12 to charge it. The set threshold can be 20%-80% of the total charge of the power battery 12, for example, 20%, 30%, 40%, 50%, 60%, 70%, or 80%, which can be determined according to the total charge of the power battery 12 and the power demand of the on-board equipment 30.

[0052] refer to Figure 4 When the instrument vehicle is operating under conditions with external mains power, the power management system 50 controls the mains power to be supplied to the on-board equipment 30 via the external power supply device 60. At this time, the external power supply device 60 may have a first output terminal and a second output terminal. The first output terminal is connected to the non-core equipment 32 to supply power to the non-core equipment 32. The second output terminal is connected to the AC voltage input terminal of the uninterruptible power supply 212, and the AC voltage output terminal of the uninterruptible power supply 212 is connected to the core equipment 31, so that the mains power is supplied to the core equipment 31 after being regulated by the uninterruptible power supply 212.

[0053] When a sudden mains power outage occurs, the power management system 50 detects that the external power supply device 60 has lost power. The power management system 50 needs to switch the mains power supply to the power battery 12 within a set time. The set time can be 5-10ms, such as 5ms, 8ms, or 10ms, and the specific time can be determined according to actual needs.

[0054] During the conversion process, i.e., within a set time, temporary power can be supplied by the uninterruptible power supply 212. The power management system 50 switches the input of the uninterruptible power supply 212 from an AC voltage input terminal to a DC voltage input terminal, which is connected to the power battery 12. The power battery 12 provides DC voltage input to the uninterruptible power supply 212, enabling the uninterruptible power supply 212 to start as a temporary power source and supply power to the core equipment 31.

[0055] In the event of a sudden power outage when the mains power is supplying power to the core device 31, an uninterruptible power supply 212 is installed between the power battery 12 and the core device 31. This uninterruptible power supply 212 can provide power during the switching process between mains power supply and power battery 12 supply, thus achieving power outage protection and ensuring that the device does not restart and the data is not lost.

[0056] It should be noted that when the instrument vehicle is in operation with external mains power, if the on-board equipment 30 requires less power, the external power supply device 60 can be connected to the power battery 12 to supply a portion of the mains power to the power battery 12 to charge the power battery 12, thereby achieving timely replenishment of the power battery.

[0057] In one embodiment, the instrument vehicle also includes a speed sensor mounted on the wheels of the instrument vehicle to detect the wheel speed. The speed sensor is electrically connected to the power management system.

[0058] Because the speed sensors are mounted on the wheels, they can detect the wheel speed and convert it into an electrical signal. Since the speed sensors are electrically connected to the power management system, the system can receive these signals and determine whether the instrument vehicle is in a driving or working condition. For example, if the speed sensor detects a non-zero speed, the instrument vehicle is moving, and the power management system identifies it as being in a driving condition. If the speed sensor detects a zero speed, the instrument vehicle is stationary, and the power management system identifies it as being in a working condition.

[0059] According to an embodiment of the present invention, reference 1- Figure 4 On the other hand, a power supply management method for an instrument vehicle is also provided, applicable to any of the instrument vehicles mentioned above. The power supply management method for the instrument vehicle includes the following steps: Acquire the status information of the instrument vehicle and identify the operating condition of the instrument vehicle based on the status information.

[0060] When the operating condition is driving, the drive motor is powered by the power battery; When the vehicle is in operation, the on-board equipment is powered by mains power or the power battery.

[0061] For example, the instrument vehicle is manually determined to be in driving or working condition. When the instrument vehicle needs to move, the manual control switches the instrument vehicle to driving condition, and the power battery 12 supplies power to the drive motor 40 to drive the instrument vehicle. When the instrument vehicle reaches the work site, the manual control switches the instrument vehicle to working condition, and the power battery 12 supplies power to the on-board equipment 30.

[0062] Alternatively, speed sensors can be installed on the wheels of the instrument vehicle. These sensors detect the wheel speeds. When the speed is not zero, the instrument vehicle is in driving mode, powered by the power battery 12 to drive the drive motor 40. When the speed is zero, the instrument vehicle is in operational mode, powered by mains power or the power battery 12 to power the onboard equipment 30.

[0063] In one embodiment, when the operating condition is a work condition, supplying power to the vehicle-mounted equipment via mains power or a power battery includes: When external mains power is available, the on-board equipment is powered by mains power. Having external mains power means that the location where the instrument vehicle operates can be easily connected to mains power lines. For example, mains power can be connected to the external power supply device 60 inside the work vehicle via wires or cables. When the external power supply device 60 is connected to mains power and is energized, the power management system 50 detects that the external power supply device 60 is energized and controls the external power supply device 60 to supply mains power to the on-board equipment 30.

[0064] When there is no external mains power, the on-board equipment 30 is powered by the power battery 12. "No external mains power" means that the location where the instrument vehicle operates cannot be easily connected to a mains power line. For example, there is no mains power supply nearby, or the mains power supply is too far away to be connected by cable, or the connection cost is high. When the external power supply device 60 is not connected to mains power and is not energized, the power management system 50 controls the power battery 12 to supply power to the on-board equipment 30.

[0065] In one embodiment, when there is no external mains power, the vehicle-mounted equipment 30 is powered by the power battery 12, and the system further includes: When the charge of the power battery 12 is not greater than the set threshold, the range extender 11 charges the power battery 12 and supplies power to the on-board equipment 30.

[0066] As power supply continues, the charge of the power battery 12 gradually decreases. When the charge of the power battery 12 is no greater than a set threshold, the power management system 50 controls the range extender 11 to start, directly supplying the main output power of the range extender 11 to the on-board equipment 30, and outputting the remaining output power to the power battery 12 to charge it. The set threshold can be 20%-80% of the total charge of the power battery 12, for example, 20%, 30%, 40%, 50%, 60%, 70%, or 80%, which can be determined according to the total charge of the power battery 12 and the power demand of the on-board equipment 30.

[0067] In one embodiment, after a mains power outage, the system switches to powering the onboard equipment via a power battery within a set time period.

[0068] The on-board equipment is powered by an uninterruptible power supply within a set time period.

[0069] When a sudden mains power outage occurs, the power management system 50 detects that the external power supply device 60 has lost power. The power management system 50 needs to switch the mains power supply to the power battery 12 within a set time. The set time can be 5-10ms, such as 5ms, 8ms, or 10ms, and the specific time can be determined according to actual needs.

[0070] During the conversion process, i.e., within a set time, temporary power can be supplied by the uninterruptible power supply 212. The power management system 50 switches the input of the uninterruptible power supply 212 from an AC voltage input terminal to a DC voltage input terminal, which is connected to the power battery 12. The power battery 12 provides DC voltage input to the uninterruptible power supply 212, enabling the uninterruptible power supply 212 to start as a temporary power source and supply power to the core equipment 31.

[0071] When the mains power supply is supplying power to the core equipment 31, in the event of a sudden power outage, an uninterruptible power supply 212 is installed between the power battery 12 and the core equipment 31. During the switching process between mains power supply and power battery power supply, the uninterruptible power supply 212 can provide power to ensure that the equipment does not restart and the data is not lost.

[0072] In one embodiment, when the instrument vehicle is in a stopped state, the power battery is charged via AC mains power. The stopped state can be when the instrument vehicle is not operating or has paused operations and is not moving, such as at night or during holidays. An external power supply device 60 can be electrically connected to the power battery 12. Connecting the external power supply device 60 to AC mains power allows the power battery 12 to be charged, ensuring sufficient power. Compared to charging the power battery 12 via the range extender 11, charging via AC mains power draws electricity from the grid, resulting in lower operating costs and a quiet, smokeless charging process.

[0073] In one embodiment, the status information includes wheel rotation speed signals, which are acquired by rotation speed sensors installed on the wheels. When the rotation speed signal is not zero, the instrument vehicle is in driving condition; when the rotation speed signal is zero, the instrument vehicle is in working condition. Rotation speed sensors are installed on the wheels of the instrument vehicle to acquire their rotation speed. When the rotation speed is not zero, the instrument vehicle is in driving condition, powered by the power battery 12 to the drive motor 40 to propel the instrument vehicle. When the rotation speed is zero, the instrument vehicle is in working condition, powered by mains power or the power battery 12 to the on-board equipment 30.

[0074] By identifying the operating conditions of the instrument vehicle through the electrical connection of the speed sensor and the power management system, the intelligence level of the instrument vehicle can be further improved.

[0075] In one specific embodiment, reference is made to Figures 1-4 After the operator starts the vehicle, the power management system 50 receives the start signal and controls the power battery 12 to supply power to the drive motor 40. The drive motor 40 then drives the instrument vehicle, which is in driving condition. During the driving of the instrument vehicle, the power battery 12 continuously supplies power to the drive motor 40.

[0076] When the instrument vehicle arrives at the work site and stops, its speed drops to zero, and it enters the working state. If there is no external mains power supply, the external power supply device 60 is not connected. The power management system 50 controls the power battery 12 to supply power to the on-board equipment 30. As power supply continues, the charge of the power battery 12 gradually decreases. When the charge of the power battery 12 is no greater than a set threshold, the power management system 50 controls the range extender 11 to start, directly supplying the main output power of the range extender 11 to the on-board equipment 30, and outputting the remaining output power to the power battery 12 to charge it. The set threshold can be 20%-80% of the total charge of the power battery 12, for example, 20%, 30%, 40%, 50%, 60%, 70%, or 80%, which can be determined based on the total charge of the power battery and the power demand of the on-board equipment 30.

[0077] When the power battery 12 supplies power to the vehicle-mounted equipment 30, the inverter in the vehicle power supply unit can convert the power battery's output DC power into AC power to match the voltage required by the vehicle-mounted equipment.

[0078] When the instrument vehicle arrives at the work site and stops, its speed drops to zero, and it is in operation. If there is an external mains power supply, the interface of the external power supply device 60 is connected to the mains power. The power management system 50 receives the electrical signal from the external power supply device 60, controls the power battery 12 to stop outputting power, and controls the external power supply device 60 to supply mains power to the on-board equipment 30.

[0079] During the process of mains power supply, due to the uncontrollability of mains power, there may be sudden power outages. The power management system 50 will switch the power supply mode to the power battery 12 to supply power to the vehicle equipment 30 within a set time to avoid affecting the normal operation of the vehicle equipment 30.

[0080] The power management system 50 detects a power outage in the external power supply device 60. The power management system 50 needs to switch from AC power to the power battery 12 within a set time. The set time can be 5-10ms, such as 5ms, 8ms, or 10ms, and can be determined according to actual needs.

[0081] During the conversion process, i.e., within a set time, temporary power can be supplied by the uninterruptible power supply 212. The power management system 50 switches the input of the uninterruptible power supply 212 from an AC voltage input terminal to a DC voltage input terminal, which is connected to the power battery 12. The power battery 12 provides DC voltage input to the uninterruptible power supply 212, enabling the uninterruptible power supply 212 to start as a temporary power source and supply power to the core equipment 31.

[0082] In the event of a sudden power outage when the mains power is supplying power to the core device 31, an uninterruptible power supply 212 is installed between the power battery 12 and the core device 31. This uninterruptible power supply 212 can provide power during the switching process between mains power supply and power battery 12 supply, thus achieving power outage protection and ensuring that the device does not restart and the data is not lost.

[0083] During the switching process between mains power supply and power battery 12, power can be supplied by uninterruptible power supply 212 to achieve power failure protection, so as to ensure that the on-board equipment 30 does not restart and the data is not lost.

[0084] When the instrument vehicle is not in operation or is not moving, such as at night or during holidays, and is in a standby state, the external power supply device 60 can be electrically connected to the power battery 12. The external power supply device 60 is connected to the mains power, and the power battery 12 can be charged through the mains power to ensure that the power battery has sufficient power. Compared with charging the power battery 12 through the range extender 11, charging through the mains power source has lower operating costs and is quiet and smokeless during the charging process.

[0085] When the instrument vehicle is in operation with external mains power, if the on-board equipment 30 requires less power, the external power supply device 60 can be connected to the power battery 12 to supply a portion of the mains power to the power battery 12 to charge the power battery 12, thereby achieving timely replenishment of the power battery.

[0086] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An instrument vehicle, characterized in that, include: Vehicle-mounted equipment (30); A drive motor (40) is used to drive the instrument vehicle. A chassis (10) is provided, on which a range extender (11) and a power battery (12) are mounted. The range extender (11) is electrically connected to the power battery (12), and the power battery (12) is electrically connected to the drive motor (40) and the on-board equipment (30). The carriage (20) has an external power supply device (60) inside, which is electrically connected to the on-board equipment (30) and has an interface for connecting to mains power. The power management system (50) is electrically connected to the range extender (11), the power battery (12) and the external power supply device (60).

2. The instrument vehicle according to claim 1, characterized in that, The carriage (20) also has an on-board power supply device (21), which includes an inverter (211). The input terminal of the inverter (211) is connected to the power battery (12), and the output terminal of the inverter (211) is connected to the vehicle-mounted equipment (30).

3. The instrument vehicle according to claim 2, characterized in that, The vehicle-mounted equipment (30) includes core equipment (31) and non-core equipment (32); The vehicle power supply device (21) also includes an uninterruptible power supply (212), which has a DC voltage input terminal, an AC voltage input terminal and an AC voltage output terminal; The DC voltage input terminal is connected to the power battery (12), the AC voltage input terminal is connected to the output terminal of the inverter (211) or to the external power supply device (60), and the AC voltage output terminal is connected to the core equipment (31). The non-core equipment (32) is electrically connected to the inverter (211) and the external power supply device (60); The core equipment (31) includes one or more of the following: fracturing control system, sand mixing control system, data acquisition system, and well site monitoring system; Non-core equipment (32) includes one or more of the following: air conditioning, heaters, and lighting equipment.

4. The instrument vehicle according to any one of claims 1-3, characterized in that, It also includes a speed sensor, which is mounted on the wheels of the instrument vehicle to detect the speed of the wheels; The speed sensor is electrically connected to the power management system (50).

5. A power supply management method for an instrument vehicle, characterized in that, Applied to the instrument vehicle as described in any one of claims 1-4, the instrument vehicle power supply management method includes the following steps: Acquire the status information of the instrument vehicle and identify the operating condition of the instrument vehicle based on the status information; When the operating condition is driving, the power battery (12) supplies power to the drive motor (40); When the operating condition is working, the on-board equipment (30) is powered by mains power or power battery (12).

6. The instrument vehicle power supply management method according to claim 5, characterized in that, When the operating condition is a working condition, the on-board equipment (30) is powered by mains power or power battery (12), including: When there is an external mains power supply, the vehicle-mounted equipment (30) is powered by the mains power. When there is no external mains power, the vehicle-mounted equipment (30) is powered by the power battery (12).

7. The instrument vehicle power supply management method according to claim 6, characterized in that, The provision of powering the vehicle-mounted equipment (30) via the power battery (12) when there is no external mains power supply also includes: When the charge of the power battery (12) is not greater than a set threshold, the range extender (11) charges the power battery (12) and supplies power to the vehicle equipment (30).

8. The instrument vehicle power supply management method according to claim 6, characterized in that, The provision of supplying power to the vehicle-mounted equipment (30) via mains power when external mains power is available also includes: After the mains power supply is interrupted, the power supply to the vehicle equipment (30) is switched to the power battery (12) within a set time. During the set time period, the vehicle-mounted equipment (30) is powered by an uninterruptible power supply (212).

9. The instrument vehicle power supply management method according to any one of claims 5-8, characterized in that, The provision of supplying power to the vehicle-mounted equipment (30) via mains power when external mains power is available also includes: When the instrument vehicle is in a stopped state, the power battery (12) is charged by the mains power.

10. The instrument vehicle power supply management method according to any one of claims 5-8, characterized in that, The step of acquiring the status information of the instrument vehicle and identifying the operating condition of the instrument vehicle based on the status information includes: The status information includes the wheel rotation speed signal; The rotational speed signal of the wheel is obtained by a rotational speed sensor installed on the wheel; When the speed signal is not zero, the instrument vehicle is in driving condition; when the speed signal is zero, the instrument vehicle is in working condition.

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