Li-Ion linear charger... Battery management ICs play an important role in ensuring the safety of users, while making sure they get the most out of their battery-powered devices. Battery management solutions require accurate voltage, current, and temperature measurements to determine the exact state of charge of batteries and battery packs.
These devices offer charge currents from as little as 200 mA to 1.2 A and are ideal for any rechargeable lithium-ion battery. The ICs provide high measurement accuracy (voltage, current, and temperature) and cell balancing functions with low power consumption.
Microsized on-chip lithium-ion batteries Recently microsized lithium-ion batteries (micro-LIBs) have been developed for on-chip integration purposes . To achieve the desirable micro-LIBs, various approaches for battery configurations and electrode structures have been developed , , , .
The battery charger for the 2-cell lithium-polymer battery is an MCP73844 dual cell Lithium Polymer charge management controller. It uses an external pass transistor (NDA8434 P-channel enhancement MOSFET) to provide up to 6A of charging current, but the 100m Ω sense resistor R6 limits the charging current to 1.1A.
Battery-on-a-chip refers to the miniature power source integrated on a chip. This kind of battery allow the lab-on-a-chip systems and miniaturized medical devices can work independently without using an external power source , . Graphene has been considered as a promising material for the primary battery-on-a-chip.
When charging the battery, switch off the load, and when loading the battery, switch off the charger. Alternatively use a PMOSFET, a resistor and a Schottky diode (See page 2 on how to do this). Lithium batteries can not absorb overcharge - the current must be cut off after charging. If not there could be thermal runaway.