1) Power up the CellLog board so that they don't pull power when not needed. This is paired with the ElectricPorsche CellLog board.
2) Control the charger contactor to prevent over-charging.
Theory
1) Monitor the ignition switch and 220V input and if either are active, turn-on the CellLog. There is also a test switch to allow for a quick check of the battery status.
2) The Charger contactor is powered by the 220V supply (through an adapter). If a CellLog alarm is triggered, shut-off and latch the contactor so that charging stops until the 220V is removed (unlatching the relay) and reconnected (restart the process). The CellLogs are set to alarm at 3.6V per cell.
Here is a schematic for the board.
Extended Test Drive
Headed out today for a long drive to see how the overall car would do including the new digital dashboard Arduino.
Cover 17 miles and used about 30AH - This leads to the following data points
- Total Range with 48AH of usable energy (80% of the 60AH battery capacity) = 27 miles
- Energy Efficiency = 30AH x 81V = 2,430 WH / 17 miles = 143 WH/mile
A few notes - Data from a app called GPS Essentials.
- Top speed for this drive was 33.6 MPH - Average speed 16.3 MPH (including stopped time)
- Miles traveled 17.3
- Total Gain of altitude 2,881 ft - Regen is on and working well - This is not net altitude, just how much climbing was measured during the drive.
- Motor Temp - never above 70C
Remote Charging
Tested the J1772 adapter at one of the Oregon State BLINK charging stations and it worked perfectly. The BLINK station recognized the car was attached and when the manual charge switch on the adapter was turned-on, the BLINK station energized and charging started. At $1/hour, BLINK is great for emergencies but no a cost-effective charging option compared to home. The following circuit is used to control the signaling to the EVSE, courtesy of EVTV - Control Signals
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