Protection control system of solar energy power bank

Abstract

The invention provides a protection control system of a solar energy power bank. The system comprises a charging module, a protection control module, a lithium battery and an output module. A sampling circuit provides a simulation sampling value, the simulation sampling value is then sent to a control chip HT46R046B, the control chip HT46R046B reads the data value of each point and then controls an interface, such as a temperature protection critical point value, an electricity quantity indication value, an over-charge value, an over-discharge value and a short circuit electrical value, and LED mode indication and keyboard control are both finished by a program compiled by the control chip HT46R046B. The protection control system of the solar energy power bank can realize the over-current charge, over-charge and over-discharge protection, standard charge program control, output short circuit protection, and over-current or over-voltage discharge protection of the solar energy power bank. Besides, a battery bulge easily caused by overheat due to over 50-degree working temperature of the lithium battery is avoided, and at the same time, difficult battery capacity recovery or discarding because the solar energy power bank is lower than a termination voltage for a long time can be avoided.

Description

technical field [0001] The invention relates to a protection system, in particular to a protection control system of a solar mobile power supply. Background technique [0002] The solar power bank uses a large-capacity lithium battery. Lithium batteries have the advantages of large capacity, no memory effect, and long life. However, lithium batteries have relatively high requirements for charging and discharging. Overcurrent charging can easily lead to serious heating of the battery. Because the battery is sealed in the plastic case of the mobile power supply, the cooling conditions are not good. Overheating over 50°C for a long time will easily cause the battery to bulge, reduce electrical performance and life, and may even catch fire or explode. Lithium batteries should have strict charging procedures to ensure battery capacity and cycle life. It is generally required to charge to 4.2V with a constant current, and then charge with a constant voltage of 4.2V until the ...

AI Technical Summary

Problems solved by technology

The cut-off voltage of the lithium battery is 3V. If it is lower than 3V, it cannot be discharged normally, and if it is lower than the cut-off voltage for a long time, the battery capacity is not easy to recover or it will be scrapped.

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