CN114597885A - A vehicle-mounted DC high-power output device and method - Google Patents

Abstract

The invention provides a vehicle-mounted direct-current high-power output device and a vehicle-mounted direct-current high-power output method, wherein the device comprises a power take-off power generation system, a control system, a load, a super capacitor module, an AC/DC high-voltage module, an AC/DC low-voltage module and a DC/DC module, wherein the AC/DC high-voltage module, the super capacitor module and the DC/DC module are connected in series to form a voltage regulating circuit, and meanwhile, the voltage regulating circuit is connected with the AC/DC low-voltage module in parallel; the parallel power supply system of the DC/DC module and the AC/DC low-voltage module can greatly improve the output performance of the vehicle-mounted direct current output device. The method can still output high power under the condition that the output power of the original power takeoff and power generation system is insufficient. Meanwhile, the device can replace a vehicle-mounted generator set, so that the environmental pollution is reduced, the cost is reduced, and the automation degree is high. And when the vehicle-mounted direct current output device is required to execute tasks for a long time, the device can realize the generalization and miniaturization of the vehicle-mounted direct current output device.

Description

A vehicle-mounted DC high-power output device and method

technical field

The present invention relates to the technical field of power supply devices, and in particular, to a vehicle-mounted DC high-power output device and method.

Background technique

The on-board DC output device is widely used in the aerospace field. For the army and aviation troops, the on-board DC output device has two main functions: one is to provide ground power for the start of the aircraft; the other is to provide the required power for the ground power inspection of the aircraft . The on-board DC output device should be able to meet the requirements of these two aspects in order to successfully complete the ground support task. At present, there are three main ways of mobile vehicle-mounted DC output devices in my country:

1. The high-power vehicle chassis engine takes power to drive the generator to generate electricity, and after conversion, it supplies power to the load.

2. The vehicle-mounted independent high-power diesel generator generates electricity, which is converted to supply power to the load.

3. The lower power vehicle chassis engine takes power to drive the generator to generate electricity, connect the converted DC output in parallel with the capacitor, and then supply power to the load.

However, the above three methods all have defects. The first vehicle-mounted DC output device power supply method has the problem that the voltage is too low when a large current is output, and the second vehicle-mounted DC output device power supply method has disadvantages such as large volume, high noise, and poor mobility. , The third vehicle-mounted DC output device power supply mode has the defects of low maximum output current and easy to cause overload "speeding", and there are hidden dangers in use.

Therefore, in order to solve the above-mentioned existing technical problems, it is urgent to propose a brand-new vehicle-mounted DC output device.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a vehicle-mounted DC high-power output device, so as to solve the aforementioned problems existing in the prior art.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

A vehicle-mounted DC high-power output device includes a power generation system, a voltage regulation system, a control system and a load, the power generation system, the voltage regulation system and the load are connected in sequence, and the control system is connected to the load. The voltage regulation system is connected; the voltage regulation system includes a super capacitor module, an AC/DC high voltage module, an AC/DC low voltage module and a DC/DC module, the AC/DC high voltage module, the super capacitor module and the DC/DC module The DC modules are connected in series to form a voltage regulation circuit, and the voltage regulation circuit is connected in parallel with the AC/DC low-voltage module;

When the power required by the load is less than or equal to the actual input power of the power generation system, the control system controls the AC/DC low-voltage module to output, and the load-controlled AC/DC high-voltage module is the super capacitor module Charge;

When the power required by the load is greater than the actual input power of the power generation system, the power generation system controls the DC/DC module and the AC/DC low-voltage module to output simultaneously;

When the on-board DC output device is outputting more than the input power of the power generation system, the load is suddenly disconnected, and the control system controls the DC/DC module and the AC/DC high-voltage module to work at the same time, and the DC/DC module can The supercapacitor is charged after the direct current of the AC/DC low voltage output is converted.

Preferably, the power take-off power generation system includes a generator, a power take-off and a cross drive shaft, the power take-off is installed on the vehicle chassis gearbox, and the power take-off is installed on the power take-off port on the side of the vehicle chassis gearbox from the power take-off. The engine on the vehicle chassis obtains power, and then transmits the power of the engine to the generator installed on the vehicle chassis through the cross drive shaft, and obtains stable and high-quality electric power by precisely controlling the speed of the engine.

Preferably, the supercapacitor module is a device that stores electrical energy by connecting a plurality of capacitor cells in series and/or parallel manner. Each single capacitor has a positive and negative electrode, and then the positive electrodes of all single capacitors are connected to form a total positive terminal, and the negative electrodes of all single capacitors are connected to form a total negative terminal, thereby forming a super capacitor module.

The AC/DC high-voltage module converts the power input from the power generation system to a series of circuits such as filtering, rectification, and anti-surge, and then converts it into high-voltage DC and outputs it. The output voltage matches the rated voltage of the super capacitor module, so as to achieve a The purpose of charging the supercapacitor module.

The DC/DC module can convert the DC power output from the AC/DC low-voltage module to output high-voltage DC to charge the supercapacitor module, and can also convert the electrical energy stored in the supercapacitor module and output it simultaneously with the AC/DC low-voltage module. supply power to the load.

The AC/DC low-voltage module is a device that converts the power input from the power generation system into low-voltage DC and outputs it after being processed by a series of circuits such as filtering, rectification, and anti-surge.

The control system is the core structure of this set of equipment, and other functional components are controlled by this control system, including the voltage and current sharing control when the parallel output between the DC/DC module and the AC/DC low-voltage module, the charge and discharge control of the capacitor, the signal Acquisition and processing, and has the function of real-time monitoring system status, to achieve the role of alarm and system protection.

The loads refer to simulated loads and real loads.

Preferably, the vehicle-mounted DC high-power output device further includes a seamless switching control module, and the seamless switching control module is connected between the control system and the AC/DC high-voltage module and the DC/DC module. The start/stop of the DC high voltage module and the forward/reverse conversion of the DC/DC module are used to control the charging and discharging of the supercapacitor module, and quickly perform the switching control of charging and discharging.

Preferably, the vehicle-mounted DC high power output device further includes a precharge control module, the precharge control module is respectively connected to the AC/DC high voltage module, the super capacitor module and the DC/DC module, the The precharge control module matches the corresponding charging mode according to the actual remaining amount in the supercapacitor module, and controls the AC/DC high-voltage module and the DC/DC module to charge the supercapacitor module using the best charging mode.

Preferably, the output device further includes a control cabinet, which is connected in communication with the control system, controls the start/stop of the control system, and collects relevant current, voltage, and temperature data.

Another object of the present invention is to provide a vehicle-mounted DC high-power output method, which is realized by the vehicle-mounted DC high-power output device, and specifically includes the following steps:

S1, power on the vehicle-mounted DC high-power output device, and the control system performs self-test on each module. After the self-test passes, it monitors the change of the power required by the load in real time. If the load current suddenly increases, go to step S2; if the load power decreases, Then go to step S3; if the load is suddenly disconnected, go to step S4;

S2, when the power required by the load is greater than the actual input power of the power generation system, the power generation system controls the DC/DC module and the AC/DC low-voltage module to output simultaneously;

S3, when the power required by the load is less than or equal to the actual input power of the power generation system, the control system controls the AC/DC low-voltage module to output, and the load controls the AC/DC high-voltage module to be the super Capacitor module charging;

S4, when the on-board DC output device is outputting power exceeding the input power of the power generation system, the load is suddenly disconnected, the control system controls the DC/DC module and the AC/DC high-voltage module to work at the same time, and the DC/DC module The super capacitor can be charged after converting the direct current output of the AC/DC low voltage.

Preferably, after the self-checking in step S1, it further includes: the control system controls the power generation system to charge the supercapacitor module with constant current until the supercapacitor module is fully charged; starting the AC/DC high-voltage module and the AC/DC low-voltage module to work state, output constant voltage with preset output voltage value; DC/DC module is in standby mode.

The beneficial effects of the present invention are:

The present invention provides a vehicle-mounted DC high-power output device and method, which can still output high-power under the condition that the output power of the original power generation system is insufficient. Compared with the original on-board DC output device, based on the super capacitor module, the instantaneous output power is increased, making the on-board DC output device more general and intelligent. At the same time, the device can replace the on-board generator set, reducing environmental pollution. Compared with the existing vehicle-mounted DC output devices with/without supercapacitor battery modules, etc., the current vehicle-mounted DC output devices need to be diversified and large to ensure daily use requirements. Through this solution, the cost can be greatly reduced, and at the same time, the present invention It is also superior to the degree of automation of existing systems. And when the on-board DC output device is required to perform tasks outside for a long time, the device can realize the generalization and miniaturization of the on-board DC output device, and the parallel power supply system of the DC/DC module and the AC/DC low-voltage module proposed by the present invention is also a power supply. For the first time in the field, it can greatly improve the output performance of the on-board DC output device.

The invention has good output performance, simple structure, good installation operability and wide application range, can meet the power supply work of various DC loads, and can be extended to various DC load systems.

Description of drawings

1 is a schematic diagram of the vehicle-mounted DC high-power output device provided in Embodiment 1;

2 is a schematic diagram of the vehicle-mounted DC high-power output device provided in Embodiment 2;

(1) Power generation system; (2) Super capacitor module; (3) AC/DC high voltage module; (4) DC/DC module; (5) AC/DC low voltage module; (6) main control system; (7) ) load; (8) control cabinet; (9) seamless switching control module; (10) pre-charging control module.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example 1

This embodiment provides a vehicle-mounted DC high-power output device, as shown in FIG. 1 , including a power generation system, a voltage regulation system, a control system and a load, the power generation system, the voltage regulation system and the The loads are connected in sequence, and the control system is connected to the voltage regulation system; the voltage regulation system includes a supercapacitor module, an AC/DC high-voltage module, an AC/DC low-voltage module and a DC/DC module, and the AC/DC high-voltage module , the super capacitor module and the DC/DC module are connected in series to form a voltage regulation circuit, and the voltage regulation circuit is connected in parallel with the AC/DC low-voltage module;

When the power required by the load is less than or equal to the actual input power of the power generation system, the control system controls the AC/DC low-voltage module to output, and the load-controlled AC/DC high-voltage module is the super capacitor module Charge;

When the power required by the load is greater than the actual input power of the power generation system, the power generation system controls the DC/DC module and the AC/DC low-voltage module to output simultaneously;

When the on-board DC output device is outputting more than the input power of the power generation system, the load is suddenly disconnected, and the control system controls the DC/DC module and the AC/DC high-voltage module to work at the same time, and the DC/DC module can The supercapacitor is charged after the direct current of the AC/DC low voltage output is converted.

The power take-off power generation system in this embodiment includes a generator, a power take-off and a cross drive shaft. The power take-off is installed on the vehicle chassis gearbox, and the power take-off is installed on the power take-off port on the side of the vehicle chassis gearbox. The generator obtains power from the engine on the vehicle chassis, and then transmits the power of the engine to the generator installed on the vehicle chassis through the cross drive shaft, and obtains stable and high-quality power by precisely controlling the speed of the engine.

The supercapacitor module in this embodiment is a device in which a plurality of capacitor cells are connected together in series and/or in parallel and store electrical energy. Each single capacitor has a positive and negative electrode, and then the positive electrodes of all single capacitors are connected to form a total positive terminal, and the negative electrodes of all single capacitors are connected to form a total negative terminal, thereby forming a super capacitor module.

The AC/DC high-voltage module converts the power input from the power generation system to a series of circuits such as filtering, rectification, and anti-surge, and then converts it into high-voltage DC and outputs it. The output voltage matches the rated voltage of the super capacitor module, so as to achieve a The purpose of charging the supercapacitor module.

The DC/DC module can convert the DC power output from the AC/DC low-voltage module to output high-voltage DC to charge the supercapacitor module, and can also convert the electrical energy stored in the supercapacitor module and output it simultaneously with the AC/DC low-voltage module. supply power to the load.

The AC/DC low-voltage module is a device that converts the power input from the power generation system into low-voltage DC and outputs it after being processed by a series of circuits such as filtering, rectification, and anti-surge.

The control system is the core structure of this set of equipment, and other functional components are controlled by this control system, including the voltage and current sharing control when the parallel output between the DC/DC module and the AC/DC low-voltage module, the charge and discharge control of the capacitor, the signal Acquisition and processing, and has the function of real-time monitoring system status, to achieve the role of alarm and system protection.

The loads in this embodiment refer to simulated loads and real loads.

Example 2

This embodiment provides a vehicle-mounted DC high-power output device. As shown in FIG. 2 , compared with the vehicle-mounted DC high-power output device provided in Embodiment 1, it further includes a seamless switching control module, a control cabinet and a pre-charging control module. module, the seamless switching control module is connected between the control system and the AC/DC high-voltage module and the DC/DC module, through the start/stop of the AC/DC high-voltage module, the forward/reverse of the DC/DC module To switch to control the charging and discharging of the supercapacitor module, and quickly perform the switching control of charging and discharging.

The precharge control module is respectively connected with the AC/DC high voltage module, the super capacitor module and the DC/DC module, and the precharge control module matches the corresponding charging according to the actual remaining amount in the super capacitor module. In this way, the AC/DC high-voltage module and the DC/DC module are controlled to charge the supercapacitor module using the best charging method.

The control cabinet is connected in communication with the control system, controls the start/stop of the control system, and collects relevant current, voltage and temperature data.

Example 3

This embodiment provides a vehicle-mounted DC high-power output method, using the vehicle-mounted DC high-power output device in Embodiment 1, including the following steps:

S1, power on the on-board DC high-power output device, and the control system conducts self-test on each module. After the self-test is passed, the control system controls the power generation system to charge the supercapacitor module with constant current until the supercapacitor module is fully charged; start The AC/DC high-voltage module and the AC/DC low-voltage module enter the working state and output constant voltage at the preset output voltage value; the DC/DC module is in standby mode.

Then, the control system is used to monitor the change of the power required by the load in real time. If the load current suddenly increases, go to step S2; if the load power decreases, go to step S3; if the load is suddenly disconnected, go to step S4;

S2, when the power required by the load is greater than the actual input power of the power generation system, the power generation system controls the DC/DC module and the AC/DC low-voltage module to output simultaneously;

S3, when the power required by the load is less than or equal to the actual input power of the power generation system, the control system controls the AC/DC low-voltage module to output, and the load controls the AC/DC high-voltage module to be the super Capacitor module charging;

S4, when the on-board DC output device is outputting power exceeding the input power of the power generation system, the load is suddenly disconnected, the control system controls the DC/DC module and the AC/DC high-voltage module to work at the same time, and the DC/DC module The super capacitor can be charged after converting the direct current output of the AC/DC low voltage.

The specific workflow is as follows:

1. Power-on charging stage

Main control: After power-on, each power module performs self-test. After the self-test is passed, the main control board controls the charger to perform constant current charging on the high-voltage supercapacitor. The charging time can be adjusted according to the requirements. Fully charged; start ACDC at the same time to meet the small current power supply. at this time:

DCDC: Standby state

ACDC: working state, the voltage set by the output control system, constant voltage mode;

Charger: constant current charging for supercapacitors

Supercapacitor: constant current charging

2. High current power supply

Main control: Monitor the sudden increase of load current, cut off the charger quickly, and quickly increase the output voltage of ACDC and DCDC power supply to prevent the generator from being overloaded and shutting down.

DCDC: in constant voltage mode to supplement the current lacking in ACDC;

ACDC: in constant current mode

Charger: Standby

Overcapacitance: high current discharge

3. Small current power supply

Main control: monitor the load current drop, start the charger, use the excess power of the generator to charge, and reduce the output voltage of the ACDC and DCDC power supplies to maintain the load side voltage basically stable;

DCDC: Standby

ACDC: in working state, output the voltage set by the control system, constant voltage mode;

Charger: constant current charging for supercapacitors

Supercapacitor: constant current charging

It should be noted that when the load is suddenly loaded, the generator is not overloaded and the processing process needs to pay attention:

1. In the charging stage, it is necessary to ensure that the sum of the charging power of the charger and the output power of the ACDC small current is less than the nominal power of the generator, and there is a margin;

2. Pre-judgment of sudden load situation, using digital switch signal to ensure the fastest exit of the charging function.

At the same time, attention should be paid to when the generator does not fly during sudden unloading:

The control system prejudges the current unloading at all times, and uses a digital switch signal to ensure that the charging function can cut in as the load of the generator as quickly as possible. At least ensure that the generator has a certain load (the power of the charger) during sudden unloading. At the same time, for the generator, there will be no direct from full load to no-load situation, and the "speeding" phenomenon will naturally not appear.

By adopting the above-mentioned technical scheme disclosed by the present invention, the following beneficial effects are obtained:

The present invention provides a vehicle-mounted DC high-power output device and method, which can still output high-power under the condition that the output power of the original power generation system is insufficient. Compared with the original on-board DC output device, based on the super capacitor module, the instantaneous output power is increased, making the on-board DC output device more general and intelligent. At the same time, the device can replace the on-board generator set, reducing environmental pollution. Compared with the existing vehicle-mounted DC output devices with/without supercapacitor battery modules, etc., the current vehicle-mounted DC output devices need to be diversified and large to ensure daily use requirements. Through this solution, the cost can be greatly reduced, and at the same time, the present invention It is also better than the automation of existing systems. And when the vehicle-mounted DC output device needs to perform tasks outside for a long time, the device can realize the generalization and miniaturization of the vehicle-mounted DC output device, and the parallel power supply system of the DC/DC module and the AC/DC low-voltage module proposed by the present invention is also a power supply. For the first time in the field, it can greatly improve the output performance of the on-board DC output device.

The invention has good output performance, simple structure, good installation operability and wide application range, can meet the power supply work of various DC loads, and can be extended to various DC load systems.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (7)

1. A vehicle-mounted direct-current high-power output device is characterized by comprising a power taking and generating system, a voltage regulating system, a control system and a load, wherein the power taking and generating system, the voltage regulating system and the load are sequentially connected, and the control system is connected with the voltage regulating system; the voltage regulation system comprises a super capacitor module, an AC/DC high-voltage module, an AC/DC low-voltage module and a DC/DC module, wherein the AC/DC high-voltage module, the super capacitor module and the DC/DC module are connected in series to form a voltage regulation circuit, and meanwhile, the voltage regulation circuit is connected with the AC/DC low-voltage module in parallel;

when the power required by the load is smaller than or equal to the actual input power of the power take-off power generation system, the control system controls the AC/DC low-voltage module to output, and the load controls the AC/DC high-voltage module to charge the super-capacitor module;

when the power required by the load is larger than the actual input power of the power taking and generating system, the power taking and generating system controls the DC/DC module and the AC/DC low-voltage module to output simultaneously;

when the vehicle-mounted direct current output device outputs power exceeding the input power of the power take-off power generation system, the load is disconnected, the control system controls the DC/DC module and the AC/DC high-voltage module to work simultaneously, and the DC/DC module can convert direct current output by the AC/DC low voltage and then charge the super capacitor.

2. The on-board dc high-power output device according to claim 1, wherein the power take-off and power generation system includes a generator, a power take-off and a cross drive shaft, the power take-off is mounted on a vehicle chassis transmission, power is taken from an engine on the vehicle chassis by the power take-off mounted on a power take-off on a side of the vehicle chassis transmission, and then power of the engine is transmitted to the generator mounted on the vehicle chassis by the cross drive shaft, thereby obtaining stable high-quality power by precisely controlling the rotation speed of the engine.

3. The vehicle-mounted direct-current high-power output device according to claim 1, further comprising a seamless switching control module, wherein the seamless switching control module is connected between the control system and the AC/DC high-voltage module and the DC/DC module, and controls the charging and discharging of the super capacitor module through the start/stop of the AC/DC high-voltage module and the forward/reverse switching of the DC/DC module, so as to rapidly perform the switching control of the charging and discharging.

4. The vehicle-mounted direct-current high-power output device according to claim 1, further comprising a pre-charging control module, wherein the pre-charging control module is respectively connected to the AC/DC high-voltage module, the super capacitor module and the DC/DC module, and the pre-charging control module matches a corresponding charging mode according to an actual remaining usage in the super capacitor module, and controls the AC/DC high-voltage module and the DC/DC module to charge the super capacitor module in an optimal charging mode.

5. The vehicle-mounted direct-current high-power output device according to claim 1, further comprising a control cabinet, wherein the control cabinet is in communication connection with the control system, controls the start/stop of the control system, and collects relevant current, voltage and temperature data.

6. A vehicle-mounted direct current high-power output method is characterized by being realized by the vehicle-mounted direct current high-power output device of any one of claims 1 to 5, and specifically comprising the following steps of:

s1, electrifying the vehicle-mounted direct current high-power output device, carrying out self-inspection on each module by the control system, monitoring the power change required by the load in real time after the self-inspection is passed, and entering S2 if the load current suddenly increases; if the load power is reduced, go to step S3; if the load is suddenly disconnected, go to step S4;

s2, when the power required by the load is larger than the actual input power of the power taking and generating system, the power taking and generating system controls the DC/DC module and the AC/DC low-voltage module to output simultaneously;

s3, when the power required by the load is smaller than or equal to the actual input power of the power take-off power generation system, the control system controls the AC/DC low-voltage module to output, and the load controls the AC/DC high-voltage module to charge the super capacitor module;

and S4, when the vehicle-mounted direct current output device outputs power exceeding the input power of the power take-off power generation system, the load is suddenly disconnected, the control system controls the DC/DC module and the AC/DC high-voltage module to work simultaneously, and the DC/DC module can convert direct current output by the AC/DC low voltage and then charge the super capacitor.

7. The vehicle-mounted direct-current high-power output method according to claim 6, wherein the self-test in step S1 further comprises: the control system controls the power take-off power generation system to perform constant-current charging on the super capacitor module until the super capacitor module is full of electric quantity; starting the AC/DC high-voltage module and the AC/DC low-voltage module to enter a working state, and outputting the high-voltage module and the low-voltage module at constant voltage according to a preset output voltage value; the DC/DC module is in standby mode.

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