3 ms·

> Bringing it to a halt with regen uses some regen and some friction. To clarify, most EV cars use only regen braking until either the pedal is pressed (Tesla

> Bringing it to a halt with regen uses some regen and some friction. To clarify, most EV cars use only regen braking until either the pedal is pressed (Tesla regens automatically by letting off the accelerator) or when the pedal is pressed hard (most other EVs).

varjag 4y ago
I owned 3 different makes of EVs, this is incorrect for all three. On a Nissan Leaf, mild regenerative is always engaged in Eco mode unless you touch gas. Otherwise when you put on the brake it's regenerative + extra braking with pads if necessary. On BMW i3 it brakes regeneratively once you slip the gas. If you use the brake pedal hard it's still regen + pads. On VW id.4 it's quite like on the Leaf. On all three it's pads only braking only when the battery is fully charged.
- mlindner 4y ago
  > On all three it's pads only braking only when the battery is fully charged. So they don't encourage only charging to 90% like on Tesla to maintain good braking action?
  - varjag 4y ago
    All manufacturers recommend reduced charging, but the range on the Leaf and i3 was too short for that to be practical.
- mlindner 4y ago
  Were they real BEVs with regenerative braking or hybrids?
  - varjag 4y ago
    All three are BEVs.
    - mlindner 4y ago
      Interesting, I guess I was thinking of other American EVs like the GM Bolt.
- jeffrallen 4y ago
  Same for the Zoe. It is interesting to consider how to make "brake by wire" safe. Stop and consider it a second... (Answer:) The pedal has failsafe interlock between your foot and the master cylinder which is "normally closed". When you ask for braking and the computer is running right, and the propulsion system can regen, then the brake pads will receive zero hydraulic pressure. If anything keeps regen from working (computer or network failure, batter is full, you are asking for more braking than the motor can make), the failsafe kicks in and your foot is connected straight to the master cylinder in order to make as much hydraulic pressure at the pads as you care to make.

varjag 4y ago

I owned 3 different makes of EVs, this is incorrect for all three. On a Nissan Leaf, mild regenerative is always engaged in Eco mode unless you touch gas. Otherwise when you put on the brake it's regenerative + extra braking with pads if necessary. On BMW i3 it brakes regeneratively once you slip the gas. If you use the brake pedal hard it's still regen + pads. On VW id.4 it's quite like on the Leaf. On all three it's pads only braking only when the battery is fully charged.

mlindner 4y ago
> On all three it's pads only braking only when the battery is fully charged. So they don't encourage only charging to 90% like on Tesla to maintain good braking action?
- varjag 4y ago
  All manufacturers recommend reduced charging, but the range on the Leaf and i3 was too short for that to be practical.
mlindner 4y ago
Were they real BEVs with regenerative braking or hybrids?
- varjag 4y ago
  All three are BEVs.
  - mlindner 4y ago
    Interesting, I guess I was thinking of other American EVs like the GM Bolt.
jeffrallen 4y ago
Same for the Zoe. It is interesting to consider how to make "brake by wire" safe. Stop and consider it a second... (Answer:) The pedal has failsafe interlock between your foot and the master cylinder which is "normally closed". When you ask for braking and the computer is running right, and the propulsion system can regen, then the brake pads will receive zero hydraulic pressure. If anything keeps regen from working (computer or network failure, batter is full, you are asking for more braking than the motor can make), the failsafe kicks in and your foot is connected straight to the master cylinder in order to make as much hydraulic pressure at the pads as you care to make.