All I can tell you is my garage is no longer heated until we fix the pellet stove, and as long as the temperature is below 50F, my battery capacity suffers about a 40%+ battery capacity lost.bobc wrote:Heating the batteries - doesn't sound very "green"
It makes an enormous difference to lead acid batteries though - we got a 45% power hike by battery heating in our greenpower race car. My impression with lipo's is that the temp makes little or no capacity difference, slight series resistance difference and there is effectively no peukert, so, like, what's the point?
Looks interesting, i like infrared heat. Probably more efficient too.LI-ghtcycle wrote:....
And it's Infrared heat, not a electrical wire that will eventually break and has more potential of causing a problem when it eventually wears out and shorts.
http://www.ebay.com/itm/FIR-Infrared-He ... 4aa7f54f5c
Voltage: 12 vLock wrote:Thanks DA! "Motorcycle Handlebars Motorcycle Warm Heat Heated Grip Kit Pads"... My guess, 12 volts, but no indication of the mA's involved... ie "wattage" consumed... The A-B on-off toggle switch is a nice touch, but I was kinda hoping to automate that process, based on ambient or cell/pack temps...
I Did Amperage wattage tests, including running pads in series with 24V & 36V, with resultant volts, watts and Amps.Lock wrote:Thanks DA! "Motorcycle Handlebars Motorcycle Warm Heat Heated Grip Kit Pads"... My guess, 12 volts, but no indication of the mA's involved... ie "wattage" consumed... The A-B on-off toggle switch is a nice touch, but I was kinda hoping to automate that process, based on ambient or cell/pack temps...
DrkAngel wrote:More test results:DrkAngel wrote:Received "Heaters" today ... 11 days shipping time.
With self adhesive tapes.
2 pads run in parallel use 1.2A
12V x 1.2A = 14.4 watts
8V x .8A = 6.4 watts
2 pads rigged in series
12V x .3A = 3.6 watts
2 pads run in series:
25.9V pack - 29V
.7A 1- 13.5V 1- 15.5V = 20Watts ... 15.5V noticeably warmer ... too hot?
Reversed voltage showed same pad running at higher V.
3 pads run in series
.5A 8.6V 9.1V 10.7V = 14.5Watts
25.9V pack - 29.2V
4 pads run in series 25.9V pack - 29.2V
Covers the main exterior surfaces of my LiPo packs.
All pads near 7V - about 3W each
Looks to be ideal for me, with batts placed in insulated pack.
37V pack - ~42V 6pack "Cool Cell" pack should work nicely with 6 pads in series.
(6 pads covering vertical surfaces nicely.)
Stats should be nearly identical to 4 pad 29.2V pack.