Storage battery system
AssigneeHitachi Automotive Systems, Ltd.
InventorAtsuo Suga
Life of this patent
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Abstract
A storage battery system includes: a secondary battery; a holding member comprising a flow channel of a cooling medium for cooling the secondary battery, which holds the secondary battery; a medium temperature measuring unit that measures temperatures T1 and T2 of the cooling medium at two locations in the flow channel; a battery temperature measuring unit that measures a temperature T3 of the secondary battery; and a judging unit that repetitively calculates a coefficient α and that judges a cooling performance of the secondary battery based on a variation of the coefficient α, the coefficient α being defined as (T3−T1)/(T2−T1), (T3−T2)/(T2−T1), or (T3−T2)/(T3−T1).
Claims7
A liquid-cooled storage battery system comprising:
- a secondary battery;
- a holding member comprising a flow channel of a cooling medium for cooling the secondary battery, which holds the secondary battery;
- a cooling medium temperature measuring unit that measures temperatures T1 and T2 of the cooling medium at two locations in the flow channel;
- a battery temperature measuring unit that measures a temperature T3 of the secondary battery;
- and
- a judging unit that repetitively calculates a coefficient α to detect a change of thermal conductive properties of members arranged between the secondary battery and the cooling medium so that a cooling performance of the secondary battery based on a variation of the coefficient α is judgeable, the coefficient α being defined as (T3−T1)/(T2−T1), (T3−T2)/(T2−T1), or (T3−T2)/(T3−T1);
- wherein the flow channel and the holding member are formed of a metal and the flow channel penetrates the inside of the holding member.
Dependencies are inferred from the claim text.