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Microsoft's new patent will improve battery life of future Surface Book devices

via:cnBeta.COM     time:2019/7/18 23:30:35     readed:100


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However, if the selected battery has different charging characteristics, maintaining battery life may depend on normal operation with different charging and/or discharging rates. For example, charging a low capacity battery at a higher than recommended charging rate can result in severe battery degradation. Charging a high capacity battery at a lower than recommended charge rate increases the charging time and may affect performance during battery discharge.

To counteract the above charging challenges, some systems separate rechargeable batteries with different charging characteristics during charging. For example, a high capacity battery and a low capacity battery can be continuously charged in parallel by a single charger or in parallel with a separate charger. Sequential charging of batteries is time consuming and there is a risk that different batteries will have different states of charge due to sudden power outages. Unlike sequential charging, parallel charging using different chargers is expensive and can increase the complexity of the overall system when reconnecting the battery after charging. In addition, the discharge is too high due to the voltage difference and resistance between the battery and the battery, which may trigger current protection and/or may damage the life of the battery.

To solve this problem,MicrosoftA new technology has been developed to regulate the current between cells with different characteristics. The result is a faster and more efficient charging process. The device disclosed in the document comprises at least two batteries having different charging characteristics, connected in parallel and arranged to share a single charging node. The apparatus also includes a charge control circuit that controls an adjustable resistor in the charging path between the single charging node and the first battery. A charge control circuit determines a charge rate of the first battery based on the detected battery parameters and controls the adjustable resistor to charge the first battery at the determined charge rate.

Now that the technology has been developed, Microsoft is likely to be in the future.SurfaceThis technology is used in Book devices.


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