| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid type lead storage battery capable of detecting that deformation of a cathode plate 3 has exceeded a given deformation volume, with the use of a liquid face detection device 12 detecting fall of a liquid face of electrolyte solution below a given height. SOLUTION: The battery is provided with cathode and anode plates 3, 4, cathode and anode terminals 9, 10, and a liquid face detection device 12 equipped with a liquid face detection electrode 12a. It is also provided with a liquid level judgment means judging that a liquid level of the electrolyte solution 6 gets below a given height in case a relation of a potential difference between the cathode and the anode terminals 9, 10 and that between the liquid face detection electrode 12a and the anode terminal 10 satisfies a predetermined first condition, as well as a cathode plate deformation judging means judging that the deformation of the cathode plate 3 exceeds a given deformation volume in case a relation of a potential difference between the cathode and the anode terminals 9, 10 and that between the liquid face detection electrode 12a and the anode terminal 10 satisfies a predetermined second condition. COPYRIGHT: (C)2008,JPO&INPIT |
