• Adverc Battery Management Systems

    Tel: 01902 380494
    Email: techsales@adverc.co.uk

     

     

  • Adverc Battery Management Systems

    Tel: 01902 380494
    Email: techsales@adverc.co.uk

     

  • Adverc Battery Management Systems

    Tel: 01902 380494
    Email: techsales@adverc.co.uk

     

  • Adverc Battery Management Systems

    Tel: 01902 380494
    Email:  techsales@adverc.co.uk

     

  • Adverc Battery Management Systems

    Tel: 01902 380494
    techsales@adverc.co.uk

     

  • BOAT SHOW OFFERS

    It's Southampton Boat Show this week

    Although we can't be there, we are still offering our annual boat show offer.

    All orders placed before 25th September will receive a 10% discount

    Quote Code : BOAT2016

     

     

  • UK Distributor for Xantrex

    We are the only UK distributor for Xantrex products.

    Visit : www.xantrex.com or contact us for more information.

    See our 'products' page for available products

  • Stop Press

    Adverc are pleased to announce that they are now the official UK distributors for 'Priority Start' 

    Visit the product section for full details

3.) Battery Theory

Updated Thursday 10/05/2012 04:58 PM

Battery technology has advanced progressively over the past 10-15 years with the advent of a variety of lead-acid types, ranging from the multi-plate, high instantaneous current capability versions (for engine starting) to the heavy traction types having low current capabilities but high discharge levels. Low-maintenance, maintenance-free, gel-type and nickel-cadmium batteries are available for a variety of applications (see section Battery Facts & Type Comparisons).

With the exception of the nickel-cadmium type, the performance and life of most batteries is adversely affected by inadequate charging caused by poor voltage regulation, the prime causes being:

a. sulphation, which is well known;
b. the lesser known phenomenon occasionally referred to as 'counter voltage'

Sulphation:

This occurs as a result of batteries being left in a discharged condition for lengthy periods.

The normal chemical reaction in the battery cells becomes incomplete and an inert coating of lead sulphate forms on the active surface of the cell plates, inhibiting the charging current and reducing battery capacity. Rapid deterioration and premature failure ensues.

Counter Voltage:

This is always present during charging and is the result of a charge build-up on the surface of the battery plates, without sufficient time for the charge to percolate into the cell matrix. The result is an artificially high battery voltage which is sufficient to fool a conventional voltage regulator into believing the battery has attained a higher level of charge and the alternator output is reduced accordingly.

This is less of a problem for engine starting batteries which experience high current drain for short periods and counter-voltage is low, on recharge. The effect is considerably more marked with auxiliary or domestic batteries where there is low/medium discharge over a long period. In practice, battery capacity is never fully restored.