algorithm is reviewed in . The battery is charged to the gassing
voltage as for ICC and then allowed to rest until the terminal voltage
falls to a value
algorithm was introduced  to avoid the effects of overcharging that
occur in the three phase algorithm. This is important to reduce water
loss in sealed batteries.
reported to leave the battery slightly undercharged and therefore
subject to sulphation. Detecting the end-of-charge point is problematic.
- It begins with a full limited current bulk charge of the battery until the gassing voltage is reached.
- Then begins a rest period until the terminal voltage falls to a preset lower limit equivalent to about 97% SoC.
- The cycle is then
repeated until the period of the cycles becomes constant.
alternative to the rather unreliable end-point detection, the end point
can be taken to be the point at which the average current measured
during charge-rest cycle falls to 5% of the battery capacity/hours.
advantage of this algorithm is that the charger can be utilised for
other batteries during the rest phases of the other batteries.
- "Charge regimes for valve-regulated lead-acid batteries: Performance overview inclusive of temperature compensation." Y.S. Wong, W.G. Hurley, W.H. Wölfle. Journal of Power Sources 183 (2008) 783–791.
Algorithms for Increasing Lead Acid Battery Cycle Life for Electric
Vehicles." Matthew A. Keyser, Ahmad Pesaran, Mark M. Mihalic, Bob
Nelson, 17 Electric Vehicle Symposium Montreal, CANADAOctober 16-18, 2000
charging of lead/acid batteries - a possible means for overcoming
premature capacity loss?" L.T. Lam *, H. Ozgun, O.V. Lim, J.A.
Hamilton, L.H. Vu, D.G. Vella, D.A.J. Rand, Journal of Power Sources 53 (1995) 215-228.
- “Mathematical modeling of current-interrupt and pulse operation of valve-regulated lead acid cells,” V. Srinivasan, G. Q. Wang, and C. Y. Wang, J. Electrochem. Soc. 150, A316–A325, 2003.