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From the FAQ (http://boostedboards.com/faq/ http://boostedboards.com/faq/): >BRAKING DOWNHILL ON A FULL BATTERY WILL CAUSE BOARD SHUTDOWN since the regen will

From the FAQ (http://boostedboards.com/faq/ http://boostedboards.com/faq/): >BRAKING DOWNHILL ON A FULL BATTERY WILL CAUSE BOARD SHUTDOWN since the regen will overcharge the battery. To prevent this from happening, the remote will warn you by beeping, and you’ll lose your braking power. Safely come to a stop before this happens, and ride on flats or uphill to drain the battery. This seems like a pretty big design flaw.

jamesaguilar 12y ago
It's not so much a design flaw as physics. Without adding brakes, what else could they do? They only have two energy sinks on board. The wheels aren't a sink when going downhill and the battery isn't a sink once it is full (unless you enjoy explosions[1]). [1] https://www.youtube.com/watch?v=gQ27lAAwGsY https://www.youtube.com/watch?v=gQ27lAAwGsY
- Ecio78 12y ago
  semi joke: what about dissipating energy in excess via heat, sound and flames? :) more seriously: what about having a setting for not fully charging the battery (let's say 80-90%), possibly user configurable, so if you don't risk your life if you forget about it? and finally a question: how does a Prius work? according to this[1] The amount of electrical energy capable of dissipation is limited by either the capacity of the supply system to absorb this energy or on the state of charge of the battery or capacitors. Effective regenerative braking can only occur if the battery or capacitors are not fully charged. For this reason, it is normal to also incorporate dynamic braking to absorb the excess energy. Searching online I found this[2] that seems to be not that far from my semi joke :) as a user says "instead of taking that energy and putting into the battery, the engine throws it off as heat." But it's also true that a Prius is way more complex and bigger, so it could have more features put in place compared to a small board like this. [1] http://en.wikipedia.org/wiki/Regenerative_brake http://en.wikipedia.org/wiki/Regenerative_brake [2] http://priuschat.com/threads/fully-charged-hv-battery-no-regenerative-braking.93230/#axzz3JsRbhwcD http://priuschat.com/threads/fully-charged-hv-battery-no-reg...
  - jamesaguilar 12y ago
    Prius regeneratively brakes until the battery is full, then engine brakes.
skdoo 12y ago
A very rare use-case (living at the top of a hill, pulling it off the charger and immediately riding downhill and braking) would result in overcharging and damaging the battery. Riders who have this use-case run the board briefly before heading downhill. In practice this extra step has not been a problem.
gonzo 12y ago
The Tesla Model S won't regen when the battery is full (or cold), either.

jamesaguilar 12y ago

It's not so much a design flaw as physics. Without adding brakes, what else could they do? They only have two energy sinks on board. The wheels aren't a sink when going downhill and the battery isn't a sink once it is full (unless you enjoy explosions[1]). [1] https://www.youtube.com/watch?v=gQ27lAAwGsY https://www.youtube.com/watch?v=gQ27lAAwGsY

Ecio78 12y ago
semi joke: what about dissipating energy in excess via heat, sound and flames? :) more seriously: what about having a setting for not fully charging the battery (let's say 80-90%), possibly user configurable, so if you don't risk your life if you forget about it? and finally a question: how does a Prius work? according to this[1] The amount of electrical energy capable of dissipation is limited by either the capacity of the supply system to absorb this energy or on the state of charge of the battery or capacitors. Effective regenerative braking can only occur if the battery or capacitors are not fully charged. For this reason, it is normal to also incorporate dynamic braking to absorb the excess energy. Searching online I found this[2] that seems to be not that far from my semi joke :) as a user says "instead of taking that energy and putting into the battery, the engine throws it off as heat." But it's also true that a Prius is way more complex and bigger, so it could have more features put in place compared to a small board like this. [1] http://en.wikipedia.org/wiki/Regenerative_brake http://en.wikipedia.org/wiki/Regenerative_brake [2] http://priuschat.com/threads/fully-charged-hv-battery-no-regenerative-braking.93230/#axzz3JsRbhwcD http://priuschat.com/threads/fully-charged-hv-battery-no-reg...
- jamesaguilar 12y ago
  Prius regeneratively brakes until the battery is full, then engine brakes.

skdoo 12y ago

A very rare use-case (living at the top of a hill, pulling it off the charger and immediately riding downhill and braking) would result in overcharging and damaging the battery. Riders who have this use-case run the board briefly before heading downhill. In practice this extra step has not been a problem.

gonzo 12y ago

The Tesla Model S won't regen when the battery is full (or cold), either.