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State of health (SOH) is a figure of merit of the condition of a battery (or a cell, or a battery pack), compared to its ideal conditions. The units of SOH are percent points (100% = the battery's conditions match the battery's specifications). Typically, a battery's SOH will be 100% at the time of manufacture and will decrease over time and use. However, a battery's performance at the time of manufacture may not meet its specifications, in which case its initial SOH will be less than 100%. ==SOH evaluation== * First, a battery management system evaluates the SOH of the battery under its management and reports it. * Then, the SOH is compared to a threshold (typically done by the application in which the battery is used), to determine the suitability of the battery to a given application. Knowing the SOH of a given battery and the SOH threshold of a given application: * a determination can be made whether the present battery conditions make it suitable for that application * an estimate can be made of the battery's useful lifetime in that application 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「State of health」の詳細全文を読む スポンサード リンク
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