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Do you have any details or examples of your battery work? Those battery numbers almost sound like switching someone from older battery chemistry to a lithium ba

by john_k 10y ago

Do you have any details or examples of your battery work? Those battery numbers almost sound like switching someone from older battery chemistry to a lithium based formula.

owenversteeg 10y ago
Although sometimes it is that simple, the two examples I quoted above (battery cost from $20/battery to $6/battery, and bringing the capacity, given the same space and weight, from 2800mAh to 7000mAh) were both examples where I swapped out existing lithium ion batteries to custom lithium ion battery packs (I build packs myself.) Another example is when a company needed a 10kW output for just a few seconds. I was able to reduce their already-optimized battery pack (the largest weight part of the system) to one twentieth of its original weight. Given a random company that hired me, I could probably accomplish one or two of the below: - Increase battery capacity by 20-120% (average maybe 50% improvement or 1.5x original, for example 900mAh -> 1400mAh) - Increase battery max output power by up to 70x (for example output power 15W -> output power 1000W) - Decrease battery weight by 20-100% (average maybe 40% improvement or 1.4x original, example 500g -> 350g) - Increase cycle lifetimes by 10x (example 300 cycles to 3000 cycles) - Increase or decrease operating voltage of battery - Make a lithium-ion battery extremely safe (not dangerous after extreme drops, heat, cold, short circuits or punctures) - Change battery form factor into something much more convenient That list is of course assuming that they're already using semi-decent lithium-ion batteries. If they're not using li-ion or using bad li-ions, the improvements are (usually) much more drastic than above. If anyone reading this is working on any project requiring batteries, shoot me an email (it's in my profile.) I can reduce cost/weight/charge time and increase power/capacity/durability (whatever you choose) - and the worst case is that I tell you your batteries are already optimal.

by john_k 10y ago

Do you have any details or examples of your battery work? Those battery numbers almost sound like switching someone from older battery chemistry to a lithium based formula.

owenversteeg 10y ago

Although sometimes it is that simple, the two examples I quoted above (battery cost from $20/battery to $6/battery, and bringing the capacity, given the same space and weight, from 2800mAh to 7000mAh) were both examples where I swapped out existing lithium ion batteries to custom lithium ion battery packs (I build packs myself.) Another example is when a company needed a 10kW output for just a few seconds. I was able to reduce their already-optimized battery pack (the largest weight part of the system) to one twentieth of its original weight. Given a random company that hired me, I could probably accomplish one or two of the below: - Increase battery capacity by 20-120% (average maybe 50% improvement or 1.5x original, for example 900mAh -> 1400mAh) - Increase battery max output power by up to 70x (for example output power 15W -> output power 1000W) - Decrease battery weight by 20-100% (average maybe 40% improvement or 1.4x original, example 500g -> 350g) - Increase cycle lifetimes by 10x (example 300 cycles to 3000 cycles) - Increase or decrease operating voltage of battery - Make a lithium-ion battery extremely safe (not dangerous after extreme drops, heat, cold, short circuits or punctures) - Change battery form factor into something much more convenient That list is of course assuming that they're already using semi-decent lithium-ion batteries. If they're not using li-ion or using bad li-ions, the improvements are (usually) much more drastic than above. If anyone reading this is working on any project requiring batteries, shoot me an email (it's in my profile.) I can reduce cost/weight/charge time and increase power/capacity/durability (whatever you choose) - and the worst case is that I tell you your batteries are already optimal.