Wireless Oximetry Lithium Polymer Battery Solution

- Mar 17, 2017-

Citation: (Keywords: Wireless Oximeter Lithium Polymer Battery) With the convenience of portable wireless Oximeter, it has became more and more popular around, which can be used for Medical institutions or families to measure human pulse rate, oxygen saturation, perfusion index (PI) and other data in sporting or sleeping, and then help users keep abreast of health status, besides you also avoid some cumbersome things like blood collection, the possibility of cross-infection, and waiting. In addition, it is powered by High performance polymer battery to achieve the needs of Sustainable, efficient and stable operation.
1) Lithium Polymer Battery design requirement
According to the requirements of consumers, in order to realize the Information Sharing between battery packs and the host engine, and rational, efficient and safe polymer battery management, we designed a host supporting polymer battery pack to integrate the polymer Battery and Battery safety protection performance together. Based on the safety of Batteries, Battery packs, and the entire system in this whole design program, the design meets the requirements of related design and certification regulations. Thus, in order to ensure the Safety and reliability of polymer Battery, we design Multi-layer protection in internal battery pack to avoid short circuit or damage caused by Overcharge, over discharge of Lithium Battery.
1.Lithium Polymer Battery Model: 301848PL/210mAh/3.7V
2.Circuit design requirement:
A.single battery overcharge protection voltage: 4.28±0.25V
B.single battery overcharge recovery voltage: 4.08±0.50V
C.single battery over discharge protection voltage: 3.00±0.08V
D.single battery over discharge recovery voltage: 3.00±0.08V
E.Combined battery over current protection (10ms):1.5~3.5A
F.Finished battery can be protected from the harm of short circuit and reverse charge.
G.Battery cycle life requirement: 300~500times (national charge and discharge standards)
H.Battery dimension design requirement: Referring to the host shell
2) The design for wireless oximetry Lithium polymer battery 
1.Lithium Polymer Battery Protection Board (PCM): 
designed for wireless oximetry polymer battery to protect circuit, the protection board needs to provide smart power calculation, overcharge, over discharge, short circuit, over current protection to avoid the hazard of burning and explosion because of its chemical properties.
2.Protection IC: The main function of this design is to protect chip, and constantly monitor the situation of overcharge, over discharge, over current, short circuit occurring, so that the chip can operate in a safe, stable and efficient condition.
3.lithium Polymer Battery Cell: 301848/210mAh/3.7V Li- Polymer cell
4.MOSFET: Field effect transistor acts as a switch in the protection circuit, and balances the voltage across the load.
5.Lithium Polymer Battery packaging: Sealed and fixed with high temperature adhesive tape on both sides



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