A solar cell charging control method, device and storage medium

Abstract

The application discloses a solar cell charging control method, equipment and storage medium, the method comprises the following steps: when the energy storage battery voltage and the solar cell voltage both meet the charging condition, the charging circuit module is controlled to start the solar cell to charge the energy storage battery, after starting charging, the charging circuit module input current is gradually increased, in the process, it is judged whether the input current reaches the constant current charging limit current, if it reaches, the charging enters the constant current charging stage; if it does not reach, it is judged whether the input voltage of the charging circuit module reaches the constant voltage charging limit voltage, if it reaches, the charging enters the constant voltage charging stage, if it does not reach, the input current continues to gradually increase until the charging enters the constant current charging stage, or the charging enters the constant voltage charging stage, when entering the constant current charging stage, the input current charges at the constant current charging limit current until the input voltage of the charging circuit module reaches the constant voltage charging limit voltage, at this time, the charging enters the constant voltage charging stage.

Description

Technical Field

[0001] This invention relates to the field of battery charging, and more specifically to a solar cell charging control method, device, and storage medium. Background Technology

[0002] Existing solar cell charging methods mostly follow the principle of allowing the solar cell to output maximum power to charge the energy storage battery. Generally, energy storage batteries are charged in a constant current and then constant voltage charging mode. This may exceed the maximum charging power that the energy storage battery can accept, causing damage to the energy storage battery. Summary of the Invention

[0003] To overcome the shortcomings of conventional energy storage batteries, which typically use a constant current followed by a constant voltage charging mode during charging, potentially exceeding the maximum acceptable charging power and causing damage to the battery, the present invention aims to provide a solar cell charging control device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A first aspect of the present invention provides a solar cell charging control method, comprising the following:

[0006] The controller determines whether the voltage of the energy storage battery and the voltage of the solar cell meet the charging conditions. Only when both meet the charging conditions will the controller control the charging circuit module to start the solar cell to charge the energy storage battery; otherwise, charging will not be started.

[0007] After the charging circuit module starts the solar cell to charge the energy storage battery, the controller enters a slow start program, controlling the input current of the charging circuit module to gradually increase. During this process, the controller determines whether the input current of the charging circuit module reaches the constant current charging limit current. If it does, the charging enters the constant current charging stage. If it does not, the controller continues to determine whether the input voltage of the charging circuit module reaches the constant voltage charging limit voltage. If it does, the charging enters the constant voltage charging stage. If it does not, the controller controls the input current of the charging circuit module to continue to gradually increase until the charging enters the constant current charging stage or the charging enters the constant voltage charging stage.

[0008] When charging enters the constant current charging stage, the controller controls the input current of the charging circuit module to charge at the constant current charging limit current, and determines whether the input voltage of the charging circuit module has reached the constant voltage charging limit voltage. If not, the controller controls the input current of the charging circuit module to continue charging at the constant current charging limit current until the input voltage of the charging circuit module reaches the constant voltage charging limit voltage, at which point charging enters the constant voltage charging stage.

[0009] The beneficial effects of this invention are as follows: First, by controlling the input current of the charging circuit module to gradually increase, when the input current of the charging circuit module (the charging current of the energy storage battery) reaches the constant current charging limit current, it enters the constant current charging stage. At this time, the charging current of the energy storage battery under constant current charging conditions does not continue to increase, ensuring that the charging efficiency of the energy storage battery is maximized while avoiding damage to the energy storage battery caused by excessive charging current. Then, the input voltage of the charging circuit module (the charging voltage of the energy storage battery) reaches the constant voltage charging limit voltage, so that charging enters the constant voltage charging stage, preventing the energy storage battery from being overcharged, affecting the performance of the energy storage battery or damaging the energy storage battery. When the input current of the charging circuit module (the charging current of the energy storage battery) has not reached the constant current charging limit current, and the input voltage of the charging circuit module (the charging voltage of the energy storage battery) reaches the constant voltage charging limit voltage, charging enters the constant voltage charging stage, preventing the energy storage battery from being overcharged. Moreover, because the input current of the charging circuit module (the charging current of the energy storage battery) increases slowly, it will not cause damage to the energy storage battery due to excessive charging current.

[0010] In some possible implementations, when charging enters the constant voltage charging stage, the controller controls the input voltage of the charging circuit module to charge at the constant voltage charging limit voltage. At this time, the controller determines whether the output current of the charging circuit module is less than the charging cutoff current. If the output current of the charging circuit module is less than the charging cutoff current, charging ends. If the output current of the charging circuit module is greater than the charging cutoff current, the controller controls the charging circuit module to increase the input current at a set interval. During this process, the controller determines whether the output current of the charging circuit module decreases. If the output current of the charging circuit module increases, the controller controls the charging circuit module to continue increasing the input current at a set interval.

[0011] If the output current of the charging circuit module decreases, the controller will control the charging circuit module to decrease the input current at set intervals. During this process, the controller will determine whether the output current of the charging circuit module continues to decrease. If the output current of the charging circuit module continues to decrease, the controller will control the charging circuit module to continue to increase the input current at set intervals.

[0012] In some possible implementations, when the controller controls the charging circuit module to increase the input current and the output current of the charging circuit module increases, the controller controls the charging circuit module to continue to increase the input current until the output current of the charging circuit module is less than the charging cutoff current, and the charging ends.

[0013] In some possible implementations, when the controller controls the charging circuit module to increase the input current and the output current of the charging circuit module decreases, the controller controls the charging circuit module to decrease the input current until the output current of the charging circuit module is less than the charging cutoff current, and the charging ends.

[0014] In some possible implementations, when the controller controls the charging circuit module to reduce the input current and the output current of the charging circuit module increases, the controller controls the charging circuit module to continue to reduce the input current until the output current of the charging circuit module is less than the charging cutoff current, and the charging ends.

[0015] In some possible implementations, when the controller controls the charging circuit module to reduce the input current and the output current of the charging circuit module is also reduced, the controller then controls the charging circuit module to increase the input current until the output current of the charging circuit module is less than the charging cutoff current, at which point charging ends.

[0016] In a second aspect, the present invention provides a solar cell charging control device that performs the steps of the above-described solar cell charging control method. The solar cell charging control device includes a solar cell and an energy storage battery. The energy storage battery and the solar cell are connected in series via a charging circuit module. The solar cell charges the energy storage battery through the charging circuit module.

[0017] It also includes a current and voltage detection module, which is connected to the solar cell, the energy storage battery and the charging circuit module respectively, and is used to detect voltage and current information in real time.

[0018] It also includes a controller, which is connected to the current and voltage detection module and is used to receive the voltage and current information in real time; the controller is also connected to the charging circuit module and is used to control the input current and output current of the charging circuit module according to the voltage and current information.

[0019] The voltage and current information includes the solar cell voltage and the energy storage battery voltage, as well as the input and output current and voltage of the charging circuit module.

[0020] A third aspect of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the solar cell charging control method described above. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the solar cell charging control device according to an embodiment of the present invention;

[0022] Figure 2 This is a flowchart illustrating the overall steps of the solar cell charging control method according to an embodiment of the present invention. Detailed Implementation

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0024] See appendix Figure 1 As shown, this invention provides an embodiment of a solar cell charging control device, which includes a solar cell and an energy storage battery.

[0025] The energy storage battery and the solar cell are connected in series through a charging circuit module, and the solar cell charges the energy storage battery through the charging circuit module.

[0026] It also includes a current and voltage detection module, which is connected to the solar cell, the energy storage battery and the charging circuit module respectively, and is used to detect voltage and current information in real time. The voltage and current information includes the solar cell voltage and the energy storage battery voltage, as well as the input and output current and voltage of the charging circuit module.

[0027] It also includes a controller, which is connected to the current and voltage detection module and is used to receive the voltage and current information in real time; the controller is also connected to the charging circuit module and is used to control the input current and output current of the charging circuit module according to the voltage and current information.

[0028] The input current of the charging circuit module is the charging current of the energy storage battery, the input voltage of the charging circuit module is the charging voltage of the energy storage battery, and the output current of the charging circuit module is the actual charging current of the energy storage battery.

[0029] See appendix Figure 2 As shown, this embodiment also provides a solar cell charging control method, applied to the aforementioned solar cell charging control device, specifically including the following steps:

[0030] The controller determines whether the voltage of the energy storage battery and the voltage of the solar cell meet the charging conditions. Only when both meet the charging conditions will the controller control the charging circuit module to start the solar cell to charge the energy storage battery; otherwise, charging will not be started.

[0031] After the charging circuit module activates the solar cell to charge the energy storage battery, the controller enters a slow-start program, gradually increasing the input current of the charging circuit module. During this process, the controller determines whether the input current of the charging circuit module reaches the constant current charging limit current. If it does, the charging enters the constant current charging stage. If it does not, the controller continues to determine whether the input voltage of the charging circuit module reaches the constant voltage charging limit voltage. If it does, the charging enters the constant voltage charging stage. If it does not, the controller continues to gradually increase the input current of the charging circuit module until the charging enters either the constant current charging stage or the constant voltage charging stage.

[0032] When the input current of the charging circuit module does not reach the constant current charging limit current and the input voltage of the charging circuit module reaches the constant voltage charging limit voltage, the charging enters the constant voltage charging stage to prevent the energy storage battery from being overcharged. Furthermore, because the input current of the charging circuit module increases slowly, the energy storage battery will not be damaged due to excessive charging current.

[0033] When charging enters the constant current charging stage, the controller controls the input current of the charging circuit module to charge at the constant current charging limit current, and determines whether the input voltage of the charging circuit module has reached the constant voltage charging limit voltage. If not, the controller controls the input current of the charging circuit module to continue charging at the constant current charging limit current until the input voltage of the charging circuit module reaches the constant voltage charging limit voltage, at which point charging enters the constant voltage charging stage.

[0034] By gradually increasing the input current of the charging circuit module, the constant current charging stage begins when the input current reaches the constant current charging limit. At this point, the charging current of the energy storage battery does not continue to increase under constant current charging conditions, ensuring maximum charging efficiency while preventing damage to the energy storage battery due to excessive charging current. Then, the input voltage of the charging circuit module is brought to the constant voltage charging limit, thus entering the constant voltage charging stage to prevent overcharging of the energy storage battery, which could affect its performance or damage it.

[0035] When charging enters the constant voltage charging stage, the controller controls the input voltage of the charging circuit module to charge at the constant voltage charging limit voltage. At this time, the charging current of the energy storage battery will gradually decrease as the energy storage battery voltage increases. The controller then determines whether the output current of the charging circuit module is less than the charging cutoff current. If the output current of the charging circuit module is less than the charging cutoff current, charging ends. If the output current of the charging circuit module is greater than the charging cutoff current, the controller controls the charging circuit module to increase the input current at set intervals. During this process, the controller determines whether the output current of the charging circuit module decreases. If the output current of the charging circuit module increases, the controller controls the charging circuit module to continue increasing the input current at set intervals.

[0036] If the output current of the charging circuit module decreases, the controller will control the charging circuit module to decrease the input current at set intervals. During this process, the controller will determine whether the output current of the charging circuit module continues to decrease. If the output current of the charging circuit module continues to decrease, the controller will control the charging circuit module to continue to increase the input current at set intervals.

[0037] This setting is to avoid excessive input current, which would reduce the actual charging current of the energy storage battery and prevent damage to the battery; and to avoid excessive charging current of the energy storage battery, which would lead to slow charging efficiency. Therefore, by increasing the actual charging current of the energy storage battery, we can ensure that the solar cell charges the energy storage battery with maximum output power.

[0038] Based on the above embodiments, when the controller controls the charging circuit module to increase the input current and the output current of the charging circuit module increases, the controller controls the charging circuit module to continue to increase the input current until the output current of the charging circuit module is less than the charging cutoff current, and the charging ends.

[0039] This setup is designed to increase the actual charging current of the energy storage battery by increasing its charging current. In the process, the maximum actual charging current of the energy storage battery is found, allowing the solar cell to charge the energy storage battery with its maximum output power.

[0040] Based on the above embodiments, when the controller controls the charging circuit module to increase the input current and the output current of the charging circuit module decreases, the controller controls the charging circuit module to decrease the input current until the output current of the charging circuit module is less than the charging cutoff current, and the charging ends.

[0041] This setup is designed to reduce the charging current of the energy storage battery to prevent it from being damaged by excessive charging current, thereby increasing the actual charging current of the energy storage battery. In this process, the maximum actual charging current of the energy storage battery is found, allowing the solar cells to charge the energy storage battery with maximum output power.

[0042] Based on the above embodiments, when the controller controls the charging circuit module to reduce the input current and the output current of the charging circuit module increases, the controller controls the charging circuit module to continue to reduce the input current until the output current of the charging circuit module is less than the charging cutoff current, and the charging ends.

[0043] This setup is designed to reduce the charging current of the energy storage battery to prevent excessive charging current from damaging the battery, thereby increasing the actual charging current of the output energy storage battery. In this process, the maximum actual charging current of the energy storage battery is found, allowing the solar cells to charge the energy storage battery with maximum output power.

[0044] Based on the above embodiments, when the controller controls the charging circuit module to reduce the input current and the output current of the charging circuit module decreases, the controller controls the charging circuit module to increase the input current until the output current of the charging circuit module is less than the charging cutoff current, and the charging ends.

[0045] This setup is designed to increase the actual charging current of the energy storage battery by increasing its charging current. In the process, the maximum actual charging current of the energy storage battery is found, allowing the solar cells to charge the energy storage battery with maximum output power.

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A solar cell charging control method, characterized in that: Including the following: The controller determines whether the voltage of the energy storage battery and the voltage of the solar cell meet the charging conditions. Only when both meet the charging conditions will the controller control the charging circuit module to start the solar cell to charge the energy storage battery; otherwise, charging will not be started. After the charging circuit module starts the solar cell to charge the energy storage battery, the controller enters a slow start program, controlling the input current of the charging circuit module to gradually increase. During this process, the controller determines whether the input current of the charging circuit module reaches the constant current charging limit current. If it does, the charging enters the constant current charging stage. If it does not, the controller continues to determine whether the input voltage of the charging circuit module reaches the constant voltage charging limit voltage. If it does, the charging enters the constant voltage charging stage. If it does not, the controller controls the input current of the charging circuit module to continue to gradually increase until the charging enters the constant current charging stage or the charging enters the constant voltage charging stage. When charging enters the constant current charging stage, the controller controls the input current of the charging circuit module to charge at the constant current charging limit current, and determines whether the input voltage of the charging circuit module has reached the constant voltage charging limit voltage. If not, the controller controls the input current of the charging circuit module to continue charging at the constant current charging limit current until the input voltage of the charging circuit module reaches the constant voltage charging limit voltage, at which point charging enters the constant voltage charging stage.

2. The solar cell charging control method according to claim 1, characterized in that: When the charging enters the constant voltage charging stage, the controller controls the input voltage of the charging circuit module to charge at the constant voltage charging limit voltage. At this time, the controller determines whether the output current of the charging circuit module is less than the charging cutoff current. If the output current of the charging circuit module is less than the charging cutoff current, then charging is complete. If the output current of the charging circuit module is greater than the charging cutoff current, the controller controls the charging circuit module to increase the input current at set intervals. During this process, the controller determines whether the output current of the charging circuit module decreases. If the output current of the charging circuit module increases, the controller controls the charging circuit module to continue to increase the input current at set intervals. If the output current of the charging circuit module decreases, the controller will control the charging circuit module to decrease the input current at set intervals. During this process, the controller will determine whether the output current of the charging circuit module continues to decrease. If the output current of the charging circuit module continues to decrease, the controller will control the charging circuit module to continue to increase the input current at set intervals.

3. The solar cell charging control method according to claim 2, characterized in that: When the controller controls the charging circuit module to increase the input current, and the output current of the charging circuit module also increases, then the controller controls the charging circuit module to continue to increase the input current until the output current of the charging circuit module is less than the charging cutoff current, and the charging ends.

4. The solar cell charging control method according to claim 2, characterized in that: When the controller increases the input current of the charging circuit module and the output current of the charging circuit module decreases, the controller will then control the charging circuit module to decrease the input current until the output current of the charging circuit module is less than the charging cutoff current, at which point charging will end.

5. The solar cell charging control method according to claim 2, characterized in that: When the controller controls the charging circuit module to reduce the input current, and the output current of the charging circuit module increases, then the controller controls the charging circuit module to continue to reduce the input current until the output current of the charging circuit module is less than the charging cutoff current, and the charging ends.

6. The solar cell charging control method according to claim 2, characterized in that: When the controller controls the charging circuit module to reduce the input current, and the output current of the charging circuit module also decreases, then the controller controls the charging circuit module to increase the input current until the output current of the charging circuit module is less than the charging cutoff current, at which point charging ends.

7. A solar cell charging control device, characterized in that: The steps of the solar cell charging control method according to any one of claims 1-6 are as follows: the solar cell charging control device includes a solar cell and an energy storage battery, the energy storage battery and the solar cell are connected in series through a charging circuit module, and the solar cell charges the energy storage battery through the charging circuit module; It also includes a current and voltage detection module, which is connected to the solar cell, the energy storage battery and the charging circuit module respectively, and is used to detect voltage and current information in real time. It also includes a controller, which is connected to the current and voltage detection module and is used to receive the voltage and current information in real time; The controller is connected to the charging circuit module and is used to control the input current and output current of the charging circuit module according to the voltage and current information. The voltage and current information includes the solar cell voltage and the energy storage battery voltage, as well as the input and output current and voltage of the charging circuit module.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the solar cell charging control method according to any one of claims 1-6.

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