Re: [EVDL] Multi-level alarm (was: Anyone using Lithiumate BMS?) - DIY Electric Car Forums
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Old 04-18-2012, 10:15 AM
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Default Re: [EVDL] Multi-level alarm (was: Anyone using Lithiumate BMS?)

Bill Dube wrote
> There will only be a "trouble" alarm/indicator on a BMS if
> the customer demands it and is willing to pay extra to get it. So
> far, that is not the case for the EV home-builder market.

The Lithiumate Lite has a "Throttle reduce" output. It's an electrically
isolated, electronically controlled, variable resistor. It is normally open;
as the battery starts getting close to empty, the resistance across that
output gradually decreases, down to 0 Ohm when the battery is completely
empty. You connect that output across the throttle pot, to get a more and
more sluggish throttle response, as the battery nears empty, down to no
throttle response when the battery is completely empty.

The Lithiumate Pro has a DCL (Discharge Current Limit) 0 to 5 V analog
output that can be used in a similar way to reduce the throttle range.

The MiniBMS has a buzzer that sounds when the battery is empty, as does the
Manzanita Micro BMS.

So, yes, the EV enthusiast does have access to BMSs that provide a warning
to the driver.

Davide Andrea
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