This is my first post to EEVblog and will be my very first electronics project. Nevertheless I feel I am already losing myself in all the technical specs.
The project I am working on is too light four LED’s (4x10w) using a battery. The battery seems to be the biggest part of this project and I have done a fair bit of research into this area, the products on the market at the moment for batteries seem like they don’t match my specifications or budget, so I am proposing on creating my own battery packs.
The LED’s I am using are 4 x 10W LED’s, they are rated for 9-10V and 900-1050mA. I want each LED to have its own lens and reflector, but I am not sure which driver I should choose, how much power I will lose to the driver and also if each LED needs cooling, by a fan and heatsink, if so how much power am I expecting to use powering the fans.
The Battery Pack I am going to create will be a 10p3s (30cell) 18650 pack, there are a lot of miss sold 18650’s on the market that have ridiculous capacities, but since I am going to be needing 120cells I can’t afford for Panasonics or Samsungs at nearly £10 for 2cells. So I will probably end up using a cheap-ish battery that has a good capacity. As a general guideline the batteries used will be 3.6V and hopefully about 2,900mAh/2.9Ah.
The 4 LED’s will take 9-10V @ 3.6/4.2A.
The 4 Battery Packs (30cell) will have a rating of 10.8V @ 116Ah.
The Estimated Time the 4 Batteries will power the 4 LED’s is 19.3hrs.
My question is does this project sound plausible/do-able? Is this sort of amount of energy needed unrealistic for project? Is there anyway I can squeeze more power? maybe running the LED’s lower? Any suggestions or discussions welcome.