Charge Time Calculator: Configured for Atto 3.

Calculator notes and instructions.

The three modes:

Time to charge to %: just fill in the initial charge percentage and the desired charge level.

Time to charge (and charge %) to have a desired range.

Time to charge (and charge %) to add desired additional range.

Time is currently minutes, not minutes and seconds.

I have significant analysis of EVs in general, and some of the Atto 3 in specific, as I feel it represents the start of a 3rd wave of EVs. As I get more data, I will update calculations.

All charge times are best case scenarios, as many things can delay charging, including the charger breaking down as you go to use it, or someone else plugging in to the only available charger just as you arrive.

Apps like a better route planner have built in calculations, but these do not always match people experiences with vehicles, particularly newly released vehicles. This calculator allows modifying the charge curve data to get result consistent with a person’s experience. Plus it is easy to calculate times for alternative plans, and use together with other route planning.

This is a first version, and will adapt to feedback. I suspect it is slightly optimistic, as currently only calculates time under ‘ideal’ circumstances. Plus there is the time for plugging in an getting the charger started to be added.

Atto 3 Charge ‘Curve’.

Charge curve from BYD via EVs & Beyond NZ.

It is not clear if this data is ‘charge added’, or ‘power to the battery’, or even power sent from the charger.
In all cases there will be some losses. The ‘losses’ field can be adjusted to allow for this.

Further, this curve is under ideal conditions. As noted on the Atto 3 page, people have recorded very different charge curves in extreme temperatures, or on chargers with more real world constratiants.

Updates.

*2022 September 28: Added charge loss calculations and moved loss setting to 1st page.

2022 September 27: Initial version.

Features to be added:

Ability to save charging curves for different vehicles.

Currently assumes >= 150kW charger, other charger options to be added.

If people find this useful, please indicate with likes (page top right), and then I will keep updating.

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January 3, 2018 August 1, 2022

After friend told me “I am not interested in electric cars, because I will wait for hydrogen cars”, I did the research, and found that such a future no longer makes any sense and will never happen. It turns out that hydrogen cars were never desirable and only viable if EVs remained impractical. Hydrogen vehicles have now been surpassed for charge times and range and they were only ever anexpensive to build and operate, higher emissions, limited interim stop gaps, for the time until we reduced the limitations of battery EVs.

Toyota: Failure inevitable?

December 16, 2017 June 30, 2023

Once the darling of Hollywood in the wake of “green” image built by the Prius hybrid, Toyota has more recently prompted shareholder complaints, and calls for boycotts by climate groups in response to Toyota anti-climate action and anti-EV lobbying that has seen the company reach the status of no 3 climate enemy company in the world, behind only Exxon-Mobil and Chevron.

Either Toyota is ideologically against action on climate change, or senior management see no way for Toyota to survive the EV transition.

Autonomous Cars: What’s needed for self-driving and are Lidar & Maps Fools-Gold

December 16, 2017 December 16, 2017

One image of a driverless cars is a Google car with a very prominent LIDAR device on the roof.

This is a look at the technologies and the needs of self drive systems, and where things are at in 2017.

There is logic to the suggestion by Elon Must that LIDAR is not needed, but there is also logic to suggesting that the steps forward from where we are to true autonomous may be a lot more challenging than it appears.

One Finite Planet

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