TWI387181B - Self - discharge compensation circuit of solar energy battery - Google Patents

Description

Self-discharge compensation circuit for solar battery

The present invention relates to a self-discharge compensation circuit for a solar battery, and more particularly to a solar control circuit that utilizes a self-discharge compensation sub-battery to compensate a solar storage main battery to enable sufficient and efficient power supply.

According to the current era of oil shortages and high oil prices, the cost of using various energy sources has increased substantially. At the same time, in order to avoid environmental pollution and avoid excessive emission of carbon dioxide, the global environment has undergone drastic changes. All parties have advocated energy conservation and carbon reduction. The method of using solar power to generate electricity is an approach to energy conservation and carbon reduction.

The method of solar power generation uses a solar panel to convert light energy into electrical energy, and then stores the electrical energy in a solar battery, and then the power supplied by the battery is supplied to a load (powered device) via a controller. However, solar cells used in general solar photovoltaic systems (such as deep-cycle lead-acid batteries) are prone to natural loss of battery power due to the self-discharge phenomenon of the battery itself, and the solar panels are often subjected to voltage instability due to the intensity of sunlight, resulting in battery utilization. The time during which the solar panel is charged to reach the required power range (ie, full charge) is greatly prolonged, thereby reducing the efficiency of solar power generation, or even causing insufficient load power supply.

In view of the shortcomings derived from the above prior art, the creator of the case was improved and innovated by the philosopher, and after years of painstaking research, he finally successfully developed a self-discharge compensation circuit for the solar battery of the present case.

The purpose of the present invention is to provide a self-discharge compensation circuit for a solar battery, which is capable of compensating for the power of a general solar storage main battery by a self-discharge compensation sub-battery to enable sufficient and efficient power supply.

For the above purposes, the technical means of the present invention is to provide a battery pack at the output end of a solar panel, the battery pack is electrically connected to a controller, and the controller is further electrically connected to a load, the battery pack is provided with a battery pack General solar storage main battery (deep cycle charge and discharge, high self-discharge rate, such as: lead-acid battery) and a self-discharge compensation secondary battery (low self-discharge rate, such as: nickel-cadmium battery), so that the main battery can be stored The electric energy supplied by the solar panel, at the same time, the secondary battery can automatically compensate the natural storage of the battery due to the self-discharge phenomenon of the battery itself, so that the power of the battery is within the required power range, and the solar panel outputs the power through the controller. It can supply power to the load with sufficient and efficient power.

Please refer to the following detailed description of a preferred embodiment of the present invention and its accompanying drawings, which will further understand the technical content of the present creation and its purpose:

A "self-discharge compensation circuit for a solar battery" provided by the present invention, as shown in Figures 1 and 2, is provided with a battery pack 11 at the output end of a solar panel 10, the battery pack 11 and a controller 12 electrical connection, the controller 12 is electrically connected to a load 13 (electrical equipment), the battery pack 11 is provided with a main battery 111 (general solar energy storage equipment, deep cycle charge and discharge, high self-discharge rate), the solar energy A first switch 112 is disposed between the board 10 and the main battery 111, so that the controller 12 can detect the storage capacity of the main battery 111. When it is detected that the storage capacity is not fully charged, and the load 13 is not During the power consumption, the first switch 112 is controlled to be turned on (ON) to be turned on, and the solar panel 10 outputs electric energy to the main battery 111. When the stored power is detected to be fully charged, the first switch is controlled. 112 open (OFF) as the cut-off conduction.

The battery pack 11 is further provided with a secondary battery 113 (the primary battery self-discharge compensation device, having a low self-discharge rate), and a second switch 114 is disposed between the solar panel 10 and the secondary battery 113, so that the controller 12 can Detecting the storage capacity of the secondary battery 113, and detecting that the storage capacity is not fully charged, the second switch 114 is controlled to be turned on (ON) to be turned on, and the solar panel 10 outputs electric energy to the secondary battery 113. When it is detected that the stored power reaches full charge, the second switch 114 is controlled to be open (OFF) as the cut-off conduction.

In addition, a backflow prevention circuit 115 and a third switch 116 are disposed between the secondary battery 113 and the main battery 111. When the first switch 112 is open (OFF), the solar panel 10 has fully charged the main battery 111. And the load 13 is in an unused period, so that the controller 12 can detect the storage capacity of the main battery 111, and when detecting that the storage capacity is not fully charged due to self-discharge of the battery itself, That is, the third switch 116 is controlled to be turned on (ON) as a conduction, and the auxiliary battery 113 outputs electric energy to compensate the power loss of the main battery 111 due to the self-discharge phenomenon of the battery, so as to reach the required power range (ie, full charge). The anti-backflow circuit 115 can prevent the main battery 111 from being fully charged (by the charging of the solar panel 10 or the compensation of the sub-battery 113), and the electric energy is returned to the sub-battery 113, so that the main battery 111 can pass the control in the future. The power output of the device 12 is capable of supplying power to the load 13 with sufficient and efficient power. When the first switch 112 is in an ON state (ie, when the solar panel 10 is charging the main battery 111) or the load 13 is in a power consumption period, the third switch 116 is controlled to be an open circuit (OFF) as a cutoff. When turned on, the sub-battery 113 stops the electric energy compensation for the main battery 111.

As shown in FIG. 1 and FIG. 2, the battery pack 11 is provided with a main battery 111 and a secondary battery 113, so that the controller 12 can control the first switch 112 and the second switch 114 to be closed (ON). The solar panel 10 outputs electric energy to the main battery 111 and the sub-battery 113 for power storage, or the controller 12 can control the first switch 112 and the second switch 114 to be open (OFF), then the solar panel 10 stopping the storage of the main battery 111 and the sub-battery 113. At the same time, the controller 12 can control the third switch 116 to be closed (ON), and the sub-battery 113 outputs electric energy to the main battery 111 for compensation. Alternatively, the controller 12 can control the third switch 116 to be an open circuit (OFF), and the secondary battery 113 stops the power compensation of the main battery 111.

Referring to FIG. 3 , the backflow prevention circuit 115 is formed by a unidirectional diode circuit 1151 , wherein a positive pole (+) of the secondary battery 113 passes through the unidirectional diode circuit 1151 and the third switch. 116 is connected to the positive electrode (+) of the main battery 111, and the negative electrode (-) of the secondary battery 113 is connected to the negative electrode (-) of the main battery 111 via the unidirectional diode circuit 1151 and the third switch 116. .

In this way, the controller 12 is used to automatically compensate the power storage of the main battery 111 due to the self-discharge phenomenon of the battery itself, so as to reach the required power range, that is, the solar panel 10 can be passed through the controller 12 . The output power is supplied to the load 13 with sufficient and efficient electrical energy.

The detailed description above is a detailed description of one of the possible embodiments of the present invention, but the embodiment is not intended to limit the scope of the patents, and the equivalent implementations or modifications, such as variations, etc., without departing from the spirit of the art. Equivalent embodiments are to be included in the scope of the patent.

10. . . Solar panels

11. . . Battery pack

111. . . Main battery

112. . . First switch

113. . . Secondary battery

114. . . Second switch

115. . . Anti-backflow circuit

116. . . Third switch

1151. . . One-way diode circuit

12. . . Controller

13. . . load

Figure 1 is a block diagram of the structure of the creation.

Figure 2 is an internal block diagram of the battery pack of the creation.

The third figure is the internal block diagram and connection diagram of the anti-backflow circuit of the creation.

10. . . Solar panels

11. . . Battery pack

12. . . Controller

13. . . load

Claims (3)

A self-discharge compensation circuit for a solar battery includes: a battery pack disposed at an output end of a solar panel, electrically connected to a controller and electrically connected to a load via the controller; a main battery: disposed at The battery pack is located between the solar panel and the controller, and is a general solar energy storage device with a high self-discharge rate; a secondary battery is disposed in the battery pack and located at the solar panel and the main battery. Between the main battery self-discharge compensation device, having a low self-discharge rate; a first switch: disposed in the battery pack, located between the solar panel and the main battery, when the controller detects the The main battery storage capacity is not fully charged and the load is in the unused period, that is, the first open circuit is controlled to be turned on, or when the controller detects that the main battery storage capacity reaches full charge, the operation is controlled. The first switch is open as the cut-off conduction; a second switch is disposed in the battery pack, located between the solar panel and the secondary battery, when the controller detects the secondary storage When the state of charge less than full charge, i.e., the second control switch is turned on as a closed, or when the controller detects the state of charge of the secondary battery is fully charged, i.e. the second switch is open, control is turned off as. The self-discharge compensation circuit for a solar battery according to claim 1 , wherein a backflow prevention circuit and a third switch are disposed in the battery pack, between the secondary battery and the main battery, when the solar energy The board has fully charged the main battery and the load is in an unused state, so that the controller can detect the storage capacity of the main battery, and when the controller detects that the storage capacity of the main battery is self-discharged due to the battery itself When the full charge is not reached to a certain extent, the third open circuit is controlled to be turned on, and the secondary battery outputs power to compensate the power loss of the main battery, and the anti-backflow circuit can prevent the power of the main battery from flowing back to the The secondary battery enables the main battery to be powered by the controller in the future, that is, the power can be supplied to the load with sufficient and efficient power, or when the solar panel is charging the main battery or the load is in use, That is, the third open circuit is controlled to be turned off, and the secondary battery stops the power compensation of the main battery. The self-discharge compensation circuit for a solar battery according to claim 1 , wherein the anti-backflow circuit is composed of a unidirectional diode circuit, and a positive electrode (+) of the secondary battery passes through the unidirectional diode The circuit and the third switch are connected to the positive electrode (+) of the main battery, and the negative electrode (-) of the secondary battery is connected to the negative electrode (-) of the main battery via the unidirectional diode circuit and the third switch .