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About MPPT charging and battery related issues (1)
Time:2019-01-26 Clicks:
2273
Can your MPPT controller charge the lithium battery? Do I need a computer to set up a lithium battery?
A: Our MPPT controller can not only charge conventional lead-acid battery/colloid battery/rich liquid battery, but also charge various lithium batteries. Wiser, eSmart, Explorer, Runner series can only be set through WIFI module and host computer. Other series Galaxy, Master, Mars can also be set on the controller.How do I set the parameters for charging a lithium battery pack (special battery)?
A: At present, the charging of MPPT controller is mainly designed for the traditional conventional battery pack (12V is composed of serial and parallel series). At the same time, the battery system is automatically identified according to the battery voltage. Therefore, if it is necessary to charge the lithium battery pack, it needs to be converted into a conventional battery. Group, the conversion method is as follows:
The nominal voltage of the lithium battery pack is between 9~15V, just like the 12V conventional battery pack, the internal calculation ratio is=1;
The nominal voltage of the lithium battery pack is between 18~30V, just like the 24V conventional battery pack, the internal calculation ratio is 2;
The nominal voltage of the lithium battery pack is between 32~40V, just like the 36V conventional battery pack, the internal calculation ratio is 3;
The nominal voltage of the lithium battery pack is between 42~60V, just like the 48V conventional battery pack, the internal calculation ratio is 4;
The nominal voltage of the lithium battery pack is between 72 and 120V, just like a 96V conventional battery pack, and the internal calculation ratio is 8;
The nominal voltage of the lithium battery pack is between 144~240V, just like the 192V conventional battery pack, the internal calculation ratio is 16;
At the same time, there are two main parameters for battery charging, one is the main charging voltage value and the other is the floating charging voltage value; so please check the main charging voltage value of the lithium battery pack first, and the lithium battery pack has no floating charging pressure value, so it is recommended Set the float voltage value ≤ main charge voltage value -- (0~0.3V)
For example, the parameters of a user's lithium battery pack are as follows: the nominal voltage is 48.1V (consisting of 13 3.7V cells in series), and the maximum charge cut-off voltage is 54.6V (4.2V*13) (this parameter refers to Main charging voltage),
The steps for setting the MPPT controller parameters for the lithium battery pack are:
1) Calculate the conventional battery pack corresponding to the lithium battery pack, and the internal calculation ratio; 48.1V is between 42~60V, just like the 48V conventional battery pack, the internal calculation ratio is 4;
2) Set the battery type to Custom Type User defined
3) Set the main charging voltage value = 13.65V (54.6V/4=13.65V; internal calculation magnification = 4)
4) Set the float voltage value between = 13.35 and 13.65; (the main charge voltage is 13.65V-(0~0.3V))
The above settings can be made by the host computer, WiFi module, or controller (requires the model that can be set)
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