发明名称 |
LIQUID LEVEL DETECTION DEVICE FOR BATTERY, AND BATTERY PROVIDED WITH THE SAME |
摘要 |
PROBLEM TO BE SOLVED: To provide a liquid level detection device of a lead battery electrolyte which has a reduced cost and an excellent precision without changing an inner structure of the lead battery to a large extent. SOLUTION: The liquid level detection device is provided with a temperature sensor arranged at a position close to a lower limit level of the electrolyte of a lead battery case outer surface and a means to memorize temperature information with the passage of time obtained by the temperature sensor. By utilizing a difference thermal capacities between the electrolyte and space and by a variation amount and variation speed of the battery temperature detected by the temperature sensor, a position of the liquid level, especially, whether or not the electrolyte liquid level is higher than the lower limit position, can be detected at a reduced cost and in a high precision without changing a battery inner structure to a large extent. COPYRIGHT: (C)2009,JPO&INPIT
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申请公布号 |
JP2008258089(A) |
申请公布日期 |
2008.10.23 |
申请号 |
JP20070101517 |
申请日期 |
2007.04.09 |
申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
KADOUCHI EIJI;KOIKE KIICHI |
分类号 |
H01M10/48;H01M2/02;H01M10/12 |
主分类号 |
H01M10/48 |
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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