The diagram showing how the CBM unit balances the voltage of a cell when voltage level has reached over 3.6V. Check .
The winter is coming: The discharge voltage for LFP cells in relation to the cell temperature.
Solar charging test data - October 2011
We are using two 217Wp panels to charge a 48V pack of 3x 12V90AH batteries. Download the results of . Check the detailed results of the LOG files. The data are recorded using the and processed by the
Using solar chargers to harvest solar power
We are testing different solar chargers to see their performance with the LFP battery packs. Here is the summary of our tests:
- shows the initial charging of a completely empty 48V/20AH LFP battery pack. We were able to charge 25Ah of
What is the real experience with LiFePO4 batteries?
Answer: The Winston Battery (formerly Thunder Sky) has been producing the LiFePO4 batteries since 2004. The first large volume customers were from the USA. These American customers have been using the LFP batteries from some 5 ~ 6 years with full sa
EVBIKE - EVBAT36V10A discharge characteristics
The provides more than 360Wh of energy for the electric bike. Check out discharge test to show the performace at 2C discharge (20A).
Download .
Testing Solar-charge controllers with LP batteries
Sample 1: STECA SOLARIX MPPT 2010
This is a Maximum Power Point Tracking (MPPT) solar charge controller. It works perfectly. It gets the maximal power from the solar panel. The ideal peak reached was 200W of power input from 217Wp sola
The demonstration of function of the CBM boards
The CBM boards (Cell Ballancing Module) will start balancing of the cell as soon as the full charge level is reached. The full charge level is is at 3.60V for LiFePO4 cells.
The diagram shows the charging of a 4-cell battery pack with following configura
The LiFePO4 charger characteristics
Thechart shows two instances of the charging of 12V 20AH battery.
First, a fully charged battery is charged again: the voltage increases very fast from 14.1V to 15.8Vand the charge limits the current and stops charging.
Second, a partially discha
The demonstration of battery overcharge
The analysis of the RT-BMS data log supplied by customer: Cells #3 and #6 were overcharged, as the voltage reached above 4.0V. These cells are already fully charged. It is necesarry to balance these cells untill the voltage level of all the cells in