Archive for September 2017

Building a 12V 110Ah Battery Bank Using 80 32650 LiFePO4 Cells

During the past couple of weeks I have been busy making a large battery bank using the eighty 32650 LiFePO4 cells I bought on eBay. The battery bank I am building is a 12V (13.2V nominal) 4S/20P one. With each cell rated at 5.5Ah the battery bank has a capacity of 110Ah, which is just under 1.5kWh. Continue reading ‘Building a 12V 110Ah Battery Bank Using 80 32650 LiFePO4 Cells’ »

Modifying a 4S 100A LiFePO4 BMS Module

For those who are following my YouTube channel, you would know that I am in the process of building a high capacity battery bank. When this project is done, I plan to use it with a 12V inverter as my backup generator in the event of a power failure. For the battery bank, I used eighty 3.2V 5.5Ah 32650 lithium iron phosphate (LiFePO4) batteries. These are arranged into 4 groups in series and each group consists of 20 cells paralleled together forming a 12.6V 110Ah battery bank. Continue reading ‘Modifying a 4S 100A LiFePO4 BMS Module’ »

Teardown and Experiments with a Doppler Microwave Transceiver

I got a couple of Microsemi’s C900502 10.525 GHz X-band Doppler radar motion sensors a while ago. This batch was made in UK and had “UK patents 2243495 and/or 2253108 apply” printed on the case. I have seen a teardown of an HB100 Doppler radar module before and was wondering if I this one is any different inside. Continue reading ‘Teardown and Experiments with a Doppler Microwave Transceiver’ »