ELECTRIC POWER STORAGE SYSTEM
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Accused Products
Abstract
When a continuous short circuit occurs between both terminals of a battery pack, fault, destruction and rupture of the battery can occur. Further, when a momentary short circuit occurs, a user may continue to use, without knowing thermal and electrical damage to the batteries, and reliability for the batteries is impaired, To overcome the problem, in a battery pack configured by connecting a plurality of storage batteries in series, at least one first storage battery is included which has a low capacity compared to second storage batteries during high-rate discharge, and the first storage battery undergoes polarity inversion during external short circuit, thereby preventing the other batteries from becoming damaged. There are also included a detector that detects voltage of the first storage battery, and a fault signal generator that generates an output fault signal when a voltage detected by the detector inverses.
10 Citations
19 Claims
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1-7. -7. (canceled)
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8. An electric power storage system, comprising:
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a battery pack configured by connecting in series at least one first rechargeable storage battery; and at least one second rechargeable storage battery, wherein a starting point of a diffusion limited region of the first storage battery is smaller in current than that of the second storage battery; a detector that detects a voltage of the first storage battery; and a fault signal generator that generates an output fault signal when the voltage detected by the detector inverses. - View Dependent Claims (10, 11, 12, 14, 15, 16, 18, 19)
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9. An electric power storage system, comprising:
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a battery pack configured by connecting in series a first rechargeable storage battery, whose rated current is assigned as I and whose voltage generated when the rated current flows through the battery is assigned as V, and a plurality of second rechargeable storage batteries, whose rated current is assigned as I and whose voltage generated when the rated current flows through the battery is assigned as V, the first and second storage batteries being connected in series; wherein a total number of the first and second storage batteries is assigned as n, and internal resistance Rx in the first storage battery, when a short circuit current flows through the first storage battery, is a value given as Rx≧
n×
V/I;a detector that detects a voltage of the first storage battery; and a fault signal generator that generates an output fault signal when the voltage detected by the detector inverses. - View Dependent Claims (13, 17)
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Specification