Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
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Re: Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
#2Hey everyone! I'm Hunter, one of the cofounders of Ohm. Let me know if I can answer any questions.
Re: Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
#3Great idea in a very stagnant market. How do the LiFePO4 cells perform at high temperatures? I've worked with this battery chemistry before, and found most off the shelf cells have internal safety circuitry that disconnects the battery at temperatures >70C. Typical engine running temperature is 60-80C (or as much as 90 on a hot day).
Re: Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
#4Hey everyone! I'm Hunter, one of the cofounders of Ohm. Let me know if I can answer any questions.
Will this work when its -30F?
Re: Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
#5So yesterday Audi/Porsche/VW announced a new v6 engine that will be used in variations across all their vehicles. Further down the line, they said that engine would include an electric drive component as well, incorporating a battery, effectively making all their cars "hybrids".
This seems to be the trend, see racing tech (Formula 1, WEC, etc.). We will probably see this in all new consumer cars sometime soon.
Once every car has a battery, wouldn't the standard car battery that's most common today be obsolete?
At your price point, performance/luxury cars seem to be your only market, which are also the cars that will electric drive before mid to low end cars. These are also the owners who will replace their cars every 3-5 years anyway. Either from a 3 year lease or the 4 year warranty is out and they want something new.
I don't mean to be discouraging but, it seems your market viability, if there is any to begin with, is already limited to 5 years at the most.
I do love the idea of saving 30 lbs weight, it's negligible for most of my driving in my sports coupe, but I like to feel like it's making a difference!
Re: Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
#6Lead acid is traditionally very forgiving with regards to temperature. How does the electrical performance of your battery vary with temperature, especially at extremely cold (-40C) and extremely hot (80C) conditions?
Re: Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
#7Hey everyone! I'm Hunter, one of the cofounders of Ohm. Let me know if I can answer any questions.
Will this work when its -30F?
http://www.mpoweruk.com/lithiumS.htm
Stricter regulations on shipping methods than for other cell chemistries. Degrades at high temperatures.
However, for Lithium Iron Phosphate LiFePO4: "Lithium phosphate cells are incombustible in the event of mishandling during charge or discharge, they are more stable under overcharge or short circuit conditions and they can withstand high temperatures without decomposing."
Re: Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
#8Re: Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
#9I've been looking at ultracaps on digikey for a while, for just this application. Looks like a great implementation, please sign me up for the beta!
Re: Ohm (YC S15) is a smarter, lighter car battery that works with your existing car
#10Hey everyone! I'm Hunter, one of the cofounders of Ohm. Let me know if I can answer any questions.
Hi Hunter
How much safety testing have you done on your battery? Specifically, if an Ohm battery is involved in a collision, how will it fare? I know you are not content with shipping anything you aren't comfortable with your own family members driving with [1]. But, how do you know this? What makes you so sure? I don't mean to come across as interrogative - I am just curious.
edit: grammar