Innovative Products for the 21st Century BATTERY MANAGEMENT SOLUTIONS 1. What is the optimum float voltage for an ICE device? The optimum float voltage using an ICE device is 2.26V for the 1001 model or 2.24V for the 1002 model, which allows a current flow of approximately 50mA through the ICE device while the normal float current flows through the cells. 2. How much current does the ICE device use when the battery cell is charging (after a load event)? When the battery cells require charging the ICE devices will conduct no (0) current as the cell voltage will be below the float voltage? The ICE devices will start to conduct as each cell comes up to full charge, essentially allowing extra current (up to 350mA) to bypass the cell and thus preventing an overcharge and allowing that extra to be available to the cells that have not reach their float voltage level. This causes the bank to equalize at the correct float voltage. 3. If the battery bank needs to be refreshed or load tested, is there a problem with charging again with the ICE device in place? The ICE device will not be harmed during this occurrence, however the ICE will limit the charging voltage to the 2.25V threshold. (See 2 above) 4. If a 3-cell battery did not have individual cell access, could three ICE device be installed in series and go across a 6.75V battery (3 x 2.25)? Due to the nature of the battery cell makeup, using an ICE device would not be beneficial to the battery 5. Our typical battery bank which is at 130VDC, requires a float charge of approximately 22mA.  From your literature, it looks like the ICE would require an additional 50mA to that value.  Is this correct? In this application, a normal battery cell would need 22ma to maintain its charge however, not all battery cells are equal in a battery bank. Some need more current, some need less. On a typical battery cell, the ICE device will have 50ma flowing through it in addition to the nominal charging current for a total of 72mA. This way, there is some extra current for the ICE devices to give the cells which need more and for the ICE devices to take some away from the cells that need less. 6. Would leaving an ICE device connected during an impedance test affect the per cell impedance values measured? If the impedance test is done by placing a heavy load on the bank (or cell) while measuring cell voltage and current, then the ICE device will have no affect on the test as the cell voltages will certainly dip below the float voltage and the ICE will shut off. The same thing happens during a load event. FAQ