Equivalent Circuit of a Battery Considering Transient Response and Discharge Characteristics

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  • 電池のインピーダンス特性と放電特性を考慮した等価回路の検討
  • デンチ ノ インピーダンス トクセイ ト ホウデン トクセイ オ コウリョ シ

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Abstract

Dry batteries and rechargeable batteries such as Ni-Cd batteries and Ni-MH batteries are widely used for uniterruptible power supplies and portable terminals. In the design of battery-powered equipment, circuit simulation is often conducted. In conventional simulations, the battery is generally treated as a voltage source, but it would be better to consider the battery's electrical characteristics, such as its internal impedance and the current and voltage characteristics at discharge and charge conditions. The electrical characteristics of secondary batteries have mainly been studied for diagnosing battery deterioration, in which only the battery impedance is considered.<br> This paper presents an equivalent circuit of a secondary battery that is suitable for power circuit simulation. This equivalent circuit expresses the transient characteristics and the current and voltage characteristics for discharge. The equivalent circuit of a Ni-Cd battery is confirmed by simulations and experiments.

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