Design of Battery Charging System based on Dissipation of Internal Resistance
碩士 === 國立彰化師範大學 === 電機工程學系 === 103 === Because the internal resistance of a battery is the main cause resulting in the dissipation of joule heat, the charging current should be adjusted with the variation of internal resistance to maintain the thermal rising and protect the battery cycle life. Acco...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2015
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| Online Access: | http://ndltd.ncl.edu.tw/handle/01689602120509454209 |
| Summary: | 碩士 === 國立彰化師範大學 === 電機工程學系 === 103 === Because the internal resistance of a battery is the main cause resulting in the
dissipation of joule heat, the charging current should be adjusted with the variation
of internal resistance to maintain the thermal rising and protect the battery cycle
life. According to the above reasons, this thesis presented a battery charging
system based on the dissipation of the joule heat from the internal resistance. The
proposed charging system included two major functions—online internal
resistance measurement and dynamic charging current adjustment—which were
implemented by digital signal controller dsPIC33FJ16GS502 from Microchip
Technology Inc.. Through the predetermined charge dissipation parameter and
online internal resistance measurement, the charger can adjust the charging current
dynamically. Finally, two Samsung ICR18650-22F lithium-ion cells were
employed in the experiments. The experimental results show that the proposed
system has the ability of adjusting the charging current with the variation of the
internal resistance to achieve the purpose of controlling the thermal rising in
charging process.
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