发明名称 |
METHOD OF EVALUATING REMAINING POWER OF A BATTERY FOR PORTABLE DEVICES |
摘要 |
<p>A remaining energy E of a battery is estimated based on a measurement of a momentary voltage and a momentary current. E is defined as a function of its voltage U or power owing to a characteristic function (E/U) or (E/P). Instead of the function, a lookup table can be used. E/U function is defined by using a reference battery having the same or similar characteristics. A set of low and high current or power loads are applied to the reference battery to cause voltage drops which are measured and then used to determine function (E/U) and a parameter Alpha which is specific to the type of reference battery. During the operation of the battery, momentary voltage and current are measured and Alpha is used to correct the momentary voltage. Afterwards, function (E/U) enables to estimate E. The battery size is used to scale E for a better estimation.</p> |
申请公布号 |
WO2011148214(A1) |
申请公布日期 |
2011.12.01 |
申请号 |
WO2010IB01262 |
申请日期 |
2010.05.27 |
申请人 |
NOKIA CORPORATION;VESTAMA, MIKAEL MARTTI VAINO;RUUTU, JUSSI PEKKA OLAVI |
发明人 |
VESTAMA, MIKAEL MARTTI VAINO;RUUTU, JUSSI PEKKA OLAVI |
分类号 |
G01R31/36 |
主分类号 |
G01R31/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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