WO2011050603A1

WO2011050603A1 - Charging control method and system for photovoltaic vehicle

Info

Publication number: WO2011050603A1
Application number: PCT/CN2010/071689
Authority: WO
Inventors: 王士元
Original assignee: 英利能源（中国）有限公司; 保定嘉盛光电科技有限公司
Priority date: 2009-10-27
Filing date: 2010-04-12
Publication date: 2011-05-05
Also published as: DE112010004156T5; CN101826641A

Abstract

A charging control method and a system for a photovoltaic vehicle are used to control a photovoltaic cell (1) and a generator (2) to charge a battery (3). The method includes: detecting the voltage of the photovoltaic cell (1) (S103); judging whether the voltage of the photovoltaic cell (1) is lower than the charging voltage of the battery (3) (S104); if no (S1042), controlling the photovoltaic cell (1) to charge the battery (3) (S105); if yes (S1041), controlling the generator (2) to charge the battery (3) (S108). When the quantity of electricity generated by the photovoltaic cell (1) is large, the photovoltaic cell (1) is used to charge the battery (3); when the quantity of electricity generated by the photovoltaic cell (1) can not meet the charging requirement of the battery (3), the generator (2) is used to charge the battery (3). The method and the system can reduce oil consumption and the usage cost of the vehicle, and ensure that the vehicle can work normally under any circumstance.

Description

Photovoltaic vehicle charging control method and system

This application claims priority to Chinese Patent Application No. 200910207054.4, entitled "A Photovoltaic Vehicle Charging Control Method and System", filed on October 27, 2009, the entire contents of which is incorporated herein by reference. In the application.

Technical field

The invention relates to the technical field of new energy vehicles, in particular to a photovoltaic vehicle charging control method for controlling photovoltaic cells and a generator to charge a battery, and to a photovoltaic vehicle charging control system.

Background technique

With the development of technology, automobiles have gradually become an indispensable means of transportation for people, and the holdings of automobiles in the entire society have also been greatly increased.

The power required to drive a car is mainly derived from the engine, which provides the power required by the vehicle's walking system by burning fuel. In order to improve the comfort of the car, electric equipment such as audio and lights are usually installed in the car. In order to enable the electrical equipment such as audio, lights, and various instruments to work normally, a generator and a vehicle battery are usually installed in the automobile, and the engine of the automobile drives the generator to charge the vehicle battery, and the generator or the vehicle battery to the sound. Electrical equipment such as lights and various instruments provide the required power.

In a car of this structure, the energy required for various electrical equipment and power mechanisms is derived from the engine of the automobile, which requires the engine to provide more power, which will increase the fuel consumption of the engine, and the engine powers the generator. At the same time, it will inevitably reduce the power provided to the walking system and affect the walking performance of the car. In addition, the generator has a large weight, and the generator will increase the load weight of the car.

With the rapid development of photovoltaic cell technology, photovoltaic cells are gradually applied to various automobiles, and photovoltaic cells are installed on the surface of automobiles. The power output end of photovoltaic cells is connected with the charging end of the vehicle battery, and the photovoltaic battery is used to charge the vehicle battery. In the case of sunlight, whether the car is in a running state or in a parking state, the photovoltaic cell module can absorb solar energy and convert the solar energy into electrical energy, and store the electric energy in the vehicle battery. In this way, the engine does not consume a large amount of fuel to convert its mechanical energy into the electrical energy of the generator, which reduces fuel consumption and reduces the use cost of the automobile. The engine can be mainly used to drive the traveling mechanism, improve the efficiency of the engine, and increase the number of vehicles. Dynamic performance. However, the power generation of photovoltaic cells mainly depends on the solar radiation intensity. The photovoltaic power generation is unstable. Once the solar radiation intensity is low, the photovoltaic power generation will also become smaller. When the photovoltaic power generation is small, The vehicle battery will not be charged, and when the battery in the vehicle battery runs out, the various power devices in the car will not work properly.

Summary of the invention

The object of the present invention is to provide a photovoltaic vehicle charging control method, which uses a photovoltaic cell and a generator to charge a battery. When a photovoltaic cell generates a large amount of electricity, a photovoltaic cell is used to charge the battery, and the photovoltaic cell can not satisfy the battery. When charging is required, the generator is used to charge the battery, which can reduce fuel consumption, reduce the cost of using the car, and ensure that the car can work normally under any circumstances.

Another object of the present invention is to provide a photovoltaic vehicle charging control system.

In order to achieve the above first object, the present invention provides a photovoltaic vehicle charging control method for controlling a photovoltaic cell and a generator to charge a battery, including:

Step A: detecting the voltage of the photovoltaic cell;

Step B, determining whether the voltage of the photovoltaic cell is less than the charging voltage of the battery, if the voltage of the photovoltaic cell is not less than the charging voltage of the battery, proceeding to step C; if the voltage of the photovoltaic cell is less than the charging voltage of the battery, Go to step D;

Step C: Control the photovoltaic battery to charge the battery;

Step D: Control the generator to charge the battery.

The photovoltaic vehicle charging control method provided by the present invention comprises: detecting a voltage of the photovoltaic cell, determining whether the voltage of the photovoltaic cell is less than a charging voltage of the battery, and if the voltage of the photovoltaic cell is not less than a charging voltage of the battery, controlling the photovoltaic The battery charges the battery; if the voltage of the photovoltaic battery is less than the operating voltage of the battery, the generator is controlled to charge the battery.

The photovoltaic vehicle charging control method provided by the invention is used to charge the battery. When the voltage of the photovoltaic battery is not less than the charging voltage of the battery, the battery is charged by the photovoltaic battery. When the voltage of the photovoltaic battery is less than the charging voltage of the battery, the engine of the automobile is used. The drive motor charges the battery. When the battery is charged by the photovoltaic cell, the engine does not need to consume a large amount of fuel to convert its mechanical energy into the electric energy of the generator, which reduces the fuel consumption and reduces the use cost of the automobile; the engine can be mainly used to drive the traveling mechanism and improve the engine. Use efficiency, increase the power of the car When the battery is charged by the generator, when the photovoltaic battery cannot be charged, the battery can still be charged, so that the car can still work normally.

Preferably, before the step A, the method further includes:

Step A1, detecting the voltage of the battery;

Step A2: Determine whether the voltage of the battery is less than a preset working voltage. If the voltage of the battery is less than the preset working voltage, proceed to step A.

Preferably, in the above step B, if the voltage of the photovoltaic cell is less than the charging voltage of the battery, proceed to step B1:

Step B1, determining whether the voltage of the photovoltaic cell is less than a preset boost voltage, and if the voltage of the photovoltaic cell is not less than the preset boost voltage, proceeding to step B2, if the voltage of the photovoltaic cell is less than a preset The boost voltage, then proceeds to step D;

In step B2, the voltage of the photovoltaic cell is boosted so that the voltage of the photovoltaic cell is not less than the charging voltage of the battery, and the process proceeds to step C.

When the voltage of the photovoltaic cell is less than the charging voltage of the battery, if the voltage of the photovoltaic cell is only slightly smaller than the charging voltage of the battery, if the circuit between the photovoltaic cell and the battery is directly disconnected, the power in the photovoltaic cell will be wasted at this moment. In a preferred solution, if the voltage of the photovoltaic cell at this time is slightly smaller than the charging voltage of the battery, the voltage of the photovoltaic cell can be boosted, so that the voltage of the photovoltaic cell is not less than the charging voltage of the battery after being boosted, and the battery can be continuously charged. This avoids the waste of part of the electricity in the photovoltaic cell.

Preferably, the battery is an on-vehicle battery.

In order to achieve the above second object, the present invention also provides a photovoltaic vehicle charging control system, comprising a first detecting unit for detecting a voltage of a photovoltaic cell and emitting a voltage signal; and a control unit for receiving the voltage signal Determining, according to the voltage signal, whether the voltage of the photovoltaic cell is less than a charging voltage of the battery, and if the voltage of the photovoltaic cell is not less than the charging voltage of the battery, controlling the photovoltaic cell to charge the battery; if the voltage of the photovoltaic cell is less than The charging voltage of the battery controls the generator to charge the battery.

Preferably, the method further includes a second detecting unit;

The second detecting unit is configured to detect a voltage of the battery and send a battery voltage signal to the controller; The controller is configured to receive the battery voltage signal and determine whether the voltage of the battery is greater than a preset working voltage. If the voltage of the battery is less than a preset working voltage, the photovoltaic cell or the generator is controlled to charge the battery.

Preferably, the method further includes a boosting unit, if the voltage of the photovoltaic cell is less than a charging voltage of the battery and not less than the preset boosting voltage, the controller controls the boosting unit to increase the voltage of the photovoltaic cell Press to no less than the charging voltage of the battery.

Preferably, the battery is an on-vehicle battery.

The photovoltaic vehicle charging control system provided by the invention charges the battery. When the voltage of the photovoltaic battery is not less than the charging voltage of the battery, the battery is charged by the photovoltaic battery. When the voltage of the photovoltaic battery is less than the charging voltage of the battery, the engine of the automobile is used. The drive motor charges the battery. When the battery is charged by the photovoltaic cell, the engine does not need to consume a large amount of fuel to convert its mechanical energy into the electric energy of the generator, which reduces the fuel consumption and reduces the use cost of the automobile; the engine can be mainly used to drive the traveling mechanism and improve the engine. The use efficiency increases the power performance of the car. When the battery is charged by the generator, when the battery cannot be charged, the battery can still be charged, so that the car can still work normally.

DRAWINGS

1 is a flow chart of a specific embodiment of a photovoltaic vehicle charging control method provided by the present invention;

2 is a structural block diagram of a specific embodiment of a photovoltaic vehicle charging control system provided by the present invention.

detailed description

The core of the invention is to provide a photovoltaic vehicle charging control method, which uses a photovoltaic cell and a generator to charge the battery. When the photovoltaic cell generates a large amount of electricity, the photovoltaic cell is used to charge the battery, and the photovoltaic cell can not satisfy the battery. When charging is required, the generator is used to charge the battery, which can reduce fuel consumption, reduce the cost of using the car, and ensure that the car can work normally under any circumstances. Another core of the present invention is to provide a photovoltaic vehicle charging control system.

The present invention will be further described in detail below in conjunction with the drawings and embodiments. Please refer to FIG. 1. FIG. 1 is a flow chart of a specific embodiment of a photovoltaic vehicle charging control method according to the present invention.

As shown in FIG. 1, the photovoltaic vehicle charging control method provided by the present invention comprises the following steps: Step S101: Detecting a voltage of a battery. The current voltage value of the battery is detected, and the battery can be an on-board battery.

Step S102, determining whether the voltage of the battery is less than a preset working voltage. The preset operating voltage of the battery is the voltage at which the battery operates normally, that is, the voltage at which the battery can normally drive the consumer to operate. According to the voltage of the battery detected in step S101, the detected voltage is compared with the preset working voltage of the battery. If the detected battery voltage is not less than the preset working voltage, the battery does not need to be charged. If the detected battery voltage is less than the preset operating voltage, indicating that the battery needs to be charged, the process proceeds to step S103.

Step S103, detecting a voltage of the photovoltaic cell. When the battery needs to be charged, the voltage of the photovoltaic cell is first detected. When the photovoltaic cell receives the solar radiation energy, a certain amount of electricity will be generated. At this time, the photovoltaic cell has a certain voltage, and under the action of the voltage, the photovoltaic cell can be generated. The power output, using a single-chip microcomputer can detect the voltage of the photovoltaic cell.

Step S104, determining whether the voltage of the photovoltaic cell is less than a charging voltage of the battery. The battery has a charging voltage. When the voltage of the external power source is greater than the charging voltage, the external power source can charge the battery. Comparing the detected voltage of the photovoltaic cell with the charging voltage of the battery according to the voltage of the photovoltaic cell detected in step S103, and if the detected voltage of the photovoltaic cell is not less than the charging voltage of the battery, proceeding to step S105; If the detected voltage of the photovoltaic cell is less than the charging voltage of the battery, the process proceeds to step S106.

Step S105, controlling the photovoltaic cell to charge the battery. When the voltage of the photovoltaic cell is greater than the charging voltage of the battery, the circuit between the photovoltaic cell and the battery is controlled, and the photovoltaic cell charges the battery.

Step S106, determining whether the voltage of the photovoltaic cell is less than a preset boost voltage. When the voltage of the photovoltaic cell is less than the charging voltage of the battery, if there is still a large amount of electricity in the photovoltaic cell, the voltage of the photovoltaic cell is slightly smaller than the charging voltage of the battery, and if the circuit between the photovoltaic cell and the battery is disconnected, A waste of electricity in the photovoltaic cell. In order to avoid waste of this part of the photovoltaic cell, the voltage of this part of the power can be boosted so that it is not less than the charging voltage of the battery, but If the power of the photovoltaic cell is too small, the voltage of the photovoltaic cell is boosted, and the voltage of the photovoltaic cell cannot be reached not less than the charging voltage of the battery. Therefore, a preset boost voltage is set, and when the voltage of the photovoltaic cell is less than the preset boost voltage, the voltage of the photovoltaic cell is not boosted; when the voltage of the photovoltaic cell is not less than the preset boost voltage, The voltage of the photovoltaic cell is boosted. The voltage of the upper battery is less than the preset boost voltage, and the process goes to step S108; if the detected voltage of the photovoltaic cell is not less than the preset boost voltage, the process goes to step S107.

Step S107, boosting a voltage of the photovoltaic cell. If the detected voltage of the photovoltaic cell is not less than the preset boost voltage, boosting the voltage of the photovoltaic cell so that the voltage of the photovoltaic cell is not less than the charging voltage of the battery, and then proceeding to step S105 to control the photovoltaic The circuit between the battery and the battery is connected, and the battery is charged with a low current of a pulse oscillation frequency.

Step S108: Control the generator to charge the battery. If the detected voltage of the photovoltaic cell is less than the preset boost voltage, the photovoltaic cell cannot charge the battery, and sends an excitation control signal to the generator, and the engine drives the generator to generate electricity, and the circuit between the generator and the battery Connected, the battery is charged by the generator.

The technical effects of the photovoltaic vehicle charging control method provided by the present invention are described below.

The photovoltaic vehicle charging control method provided by the invention is used to charge the battery. When the voltage of the photovoltaic battery is not less than the charging voltage of the battery, the battery is charged by the photovoltaic battery. When the voltage of the photovoltaic battery is less than the charging voltage of the battery, the engine of the automobile is used. The drive motor charges the battery. When the battery is charged by the photovoltaic cell, the engine does not need to consume a large amount of fuel to convert its mechanical energy into the electric energy of the generator, which reduces the fuel consumption and reduces the use cost of the automobile; the engine can be mainly used to drive the traveling mechanism and improve the engine. The use efficiency increases the power performance of the car. When the battery is charged by the generator, when the battery cannot be charged, the battery can still be charged, so that the car can still work normally.

Another core of the present invention is to provide a photovoltaic vehicle charging control system, which is described in the following structural drawings.

Referring to FIG. 2, FIG. 2 is a structural block diagram of a specific implementation manner of a photovoltaic vehicle charging control system according to the present invention. The direction of the arrow in FIG. 2 is the current flow direction.

As shown in FIG. 2, the photovoltaic vehicle charging control method provided by the present invention includes a controller 4, a first The detecting unit 5 and the second detecting unit 6.

The second detecting unit 6 is configured to detect the voltage of the battery 3 and issue a battery voltage signal to the controller 4;

The first detecting unit 5 is configured to detect the voltage of the photovoltaic cell 1 and emit a voltage signal.

The control unit 4 is configured to receive the battery voltage signal sent by the second detecting unit 6, and determine whether the voltage of the battery 3 is greater than a preset working voltage. If the voltage of the battery 3 is less than a preset working voltage, control the photovoltaic cell 1 or The generator 2 charges the battery;

The control unit 4 is further configured to receive a voltage signal sent by the first detecting unit 5, and determine, according to the voltage signal, whether the voltage of the photovoltaic cell 1 is less than the charging voltage of the battery 3, and if the photovoltaic cell 1 is not less than the charging voltage of the battery 3, The photovoltaic cell 1 is controlled to charge the battery. If the voltage of the photovoltaic cell 1 is less than the charging voltage of the battery 3, the generator 2 is controlled to charge the battery 3.

In a specific embodiment, the detecting end of the first detecting unit 5 is connected to the photovoltaic cell 1, the voltage signal output end of the first detecting unit 5 is connected to the voltage signal receiving end of the controller 4, and the second detecting unit 6 is The detecting end is connected to the battery 3, and the battery voltage signal output end of the second detecting unit 6 is connected to the battery voltage signal receiving end of the controller 4.

When the voltage of the photovoltaic cell 1 is less than the charging voltage of the battery 3, if the voltage of the photovoltaic cell 1 is only slightly smaller than the charging voltage of the battery 3, if the circuit between the photovoltaic cell 1 and the battery 3 is directly disconnected, this will cause The amount of electricity in the photovoltaic cell 1 is wasted.

In a preferred solution, the boosting unit 7 is further included. If the voltage of the photovoltaic cell 1 is less than the charging voltage of the battery 3 and not less than the preset boosting voltage, the controller 4 controls the voltage of the photovoltaic cell 1 by the boosting unit 7. The voltage is boosted to not less than the charging voltage of the battery 3. The voltage of the photovoltaic cell 1 is boosted by the boosting unit 7, so that it is not less than the charging voltage of the battery 3 after being boosted, and the battery 3 can be continuously charged, thereby avoiding waste of part of the power in the photovoltaic cell 1.

The photovoltaic vehicle charging control system provided by the present invention works by the photovoltaic vehicle charging control method in the above embodiment. Therefore, the working principle and technical effects of the photovoltaic vehicle charging control system provided by the present invention will not be described in detail herein.

The above description is only a description of the preferred embodiments of the present invention, and it should be noted that due to the finiteness of the literal expression, there is an infinite specific structure objectively, and those skilled in the art can not deviate from the present invention. Under the premise of the principle, several improvements and retouchings can be made, these improvements and Retouching should also be considered as the scope of protection of the present invention.

Claims

Rights request

A photovoltaic vehicle charging control method for controlling a photovoltaic cell and a generator to charge a battery, characterized in that:

Step A: detecting the voltage of the photovoltaic cell;

Step C: Control the photovoltaic battery to charge the battery;

Step D: Control the generator to charge the battery.

The photovoltaic vehicle charging control method according to claim 1, wherein the step

A also includes:

Step A1, detecting the voltage of the battery;

The photovoltaic vehicle charging control method according to claim 1 or 2, wherein, in the step B, if the voltage of the photovoltaic cell is less than the charging voltage of the battery, proceeding to step B1, step B1, determining the location Whether the voltage of the photovoltaic cell is less than a preset boost voltage, if the voltage of the photovoltaic cell is not less than the preset boost voltage, then proceed to the following step B2, if the voltage of the photovoltaic cell is less than a preset boost voltage Voltage, then proceeds to step D;

The photovoltaic vehicle charging control method according to claim 1, wherein the battery is an in-vehicle battery.

5. A photovoltaic vehicle charging control system for controlling a photovoltaic cell and a generator to charge a battery, characterized in that it comprises:

a first detecting unit, configured to detect a voltage of the photovoltaic cell and emit a voltage signal;

a control unit, configured to receive the voltage signal, determine, according to the voltage signal, whether the voltage of the photovoltaic cell is less than a charging voltage of the battery, and if the voltage of the photovoltaic cell is not less than a charging voltage of the battery, control the photovoltaic cell pair The battery is charged; if the voltage of the photovoltaic cell is less than the battery The charging voltage controls the generator to charge the battery.

The photovoltaic vehicle charging control system according to claim 5, further comprising a second detecting unit;

The second detecting unit detects a voltage of the battery and sends a battery voltage signal to the controller;

The controller receives the battery voltage signal and determines whether the voltage of the battery is greater than a preset operating voltage. If the voltage of the battery is less than a preset operating voltage, the photovoltaic cell or the generator is controlled to charge the battery.

The photovoltaic vehicle charging control system according to claim 6, further comprising a boosting unit, if the voltage of the photovoltaic cell is less than a charging voltage of the battery, and not less than the preset boosting The voltage, the controller controls the boosting unit to boost the voltage of the photovoltaic cell to not less than the charging voltage of the battery.

The photovoltaic vehicle charging control system according to claim 7, wherein the battery is an on-vehicle battery.