EV-POWER BCU-NEV-XXC Installation Instructions Manual Download Page 13

BCU-NEV-XXC MANUAL

1.0

!

 

DO NOT ALLOW YOUR BATTERY TO DISCHARGE TO ZERO VOLTS. 

IT WILL BE PERMANENTLY DAMAGED AND EV-POWER CAN TAKE NO 
RESPONSIBILITY FOR THIS.

!

THE BATTERY SHOULD BE CHARGED REGULARLY IF BEING 

STORED.

Cell Module Installation

The cell module signal current loop cable must be connected via daisy chain to the BMS cell 

modules. The polarity does not matter.

This is covered in another manual. Install the cell modules first. It is not required for the 
prefabricated EV Power Pak batteries.

 

The cell module daisy chain should be one single series string, not two or more 

strings in parallel. Disconnecting one signal wire anywhere in the loop should immediately 
activate the BCU alarm.

Charger Control

We use and recommend Elcon chargers for the BCU-NEV range. The BCU “charger control” output 
may be used to enable/disable the charger. In this case the Elcon output terminals may be connected 
directly to the battery positive and negative terminals.

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Summary of Contents for BCU-NEV-XXC

Page 1: ...BCU NEV XXC MANUAL 1 0 EV Power Battery Control Unit NEV 5 x Installation Instructions PAGE OF 1 17...

Page 2: ...se with EV Power A series Chargers Measures current on the positive rail so no requirement for an external shunt BCU NEV Specifications Supply Voltage NEV 04C to NEV 08C 9 36VDC NEV 08C to NEV 16C 36...

Page 3: ...lting from failure of the BCU Introduction The EV Power Battery Control Unit is designed for Lithium Iron Phosphate LiFePO4 LFP batteries of capacity 40 900Ah and nominal voltage of up to 60VDC These...

Page 4: ...he unit and connected in the positive line The ON OFF remote enable momentary push button switch is mounted on the gauge display It causes the latching relay to enable disable Latching Relay Output co...

Page 5: ...it so the BCU must be powered at all times The warning light will flash for 30 seconds if the battery drops below the minimum voltage threshold It will switch o permanently and the relay will disenga...

Page 6: ...ISCHARGE Reset and charge the battery immediately Note that the low voltage cutoff threshold equates to approximately 10 remaining battery capacity more or less The battery should be considered to be...

Page 7: ...should not be relied upon to disconnect the battery every time it is used It is there as a backup No battery warranty can be assumed if the load has no inherent low voltage cutoff Note that the curren...

Page 8: ...BCU NEV XXC MANUAL 1 0 PAGE OF 8 17...

Page 9: ...aracter 2 line OLED display It displays Volts on the load terminal battery amps estimated battery amphours remaining and estimated battery State of Charge percent It can also be used to configure some...

Page 10: ...of cells the battery is considered to be flat the warning light will flash and the alarm will beep for 30 seconds After this period the alarm will become continuous and the battery will be switched o...

Page 11: ...6 CURRENT LIMIT IN RANGE 0 OVERCURRENT 1 About Pre charging and Voltage Trimpots The BCU has an automatic precharge circuit that precharges any capacitors connected on the load side of the relay In th...

Page 12: ...als Ensure that a dry powder type fire extinguisher is accessible somewhere close by Lithium Iron Phosphate batteries do not generally catch fire even under extreme abuse However they will burn if hea...

Page 13: ...d in another manual Install the cell modules first It is not required for the prefabricated EV Power Pak batteries The cell module daisy chain should be one single series string not two or more string...

Page 14: ...gram which can be acceptable for LFP batteries Charge to 29 2 29 4V then float indefinitely at 27 2 27 4V The charger may be left on when the battery is not in use if it has this characteristic Do not...

Page 15: ...and charge individual cells if required using a small current 1A max About Lithium Iron Phosphate Batteries A battery is made up of cells Each cell is an individual unit that cannot be split into a lo...

Page 16: ...nnected The charge current must be supplied via the BCU If there is a problem with the BMS do not charge the battery until it is corrected Do not allow the battery to go flat If it goes flat this is a...

Page 17: ...scharge Similar to SOC except it is expressed as a percentage down from full eg 100 DOD empty LiFePO4 LFP Lithium Iron Phosphate used in the EV Power battery chemistry Nominal Voltage the resting volt...

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