Replacing motorcycle battery with capacitors

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kingdragonfly

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#240405 6-Sep-2018 11:22

A guy at work replaced his motorcycle battery with these capacitors.

He says he has no more battery problems

He reckons it takes him 20 seconds to fully charge them and he can get 10-20 starts from full charge.

Any opinions? Is it dangerous?

"CDA 16V 20F Ultracapacitor Engine Battery Starter Booster Car Super Capacitor"

https://www.ebay.com/itm/CDA-16V-20F-Ultracapacitor-Engine-Battery-Starter-Booster-Car-Super-Capacitor/162332174096?epid=1466138986&hash=item25cbc06710:g:KpEAAOSw2xRYXiN6

tripper1000

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#2084941 6-Sep-2018 11:35

Watching with interest.

I think I'd need to see that to believe it. The way I read the instructions this module supplements the battery, rather than replaces it.

This type of super-capacitor storage is in use to hybrid-ise trucks and cranes, but is designed to quickly store and quickly release relatively small quantities of power like an F1 KERS system ie charge when a truck is braking and return the energy when the truck is accelerating. They can't supply sustained output, so the motorcycles headlights would run the cell down to flat in a minute or two without a battery.

tripper1000

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#2084943 6-Sep-2018 11:38

These guys do the truck and crane capacitors and they are on a much larger scale than the linked eBay capacitors:

https://www.youtube.com/watch?v=KQ2Eo6wl5r0

n00dy

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#2084991 6-Sep-2018 12:38

Interesting idea, the concept is sound based on the modern vehicles only requires a battery for starting purposes, but I dont think the reduction in weight is significant enough to make a difference, if it was a better sollution I would think the manufacturers would have staeted making the changes as OEM

kingdragonfly

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#2085071 6-Sep-2018 14:35

I got clarification.

He was having problems with a weak battery after sitting in storage

He still has a battery, but the capacitor charges up in a few seconds handles the starting.

Delphinus

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#2085097 6-Sep-2018 15:22

I have heard of people racing bikes using a capacitor instead of a battery to keep weight down. Then just using the kickstart to start it.

tripper1000

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#2085101 6-Sep-2018 15:25

Ah, I thought it would be pretty amazing to entirely replace a vehicle battery with capacitors. Maybe in years to come, but not yet.