METHOD FOR QUICK-CHARGING NON-AQUEOUS ELECTROLYTIC SECONDARY BATTERY AND ELECTRIC EQUIPMENT USING THE SAME
First Claim
1. A method for quick charging a non-aqueous electrolytic secondary battery which includes a heat-resistant layer between a negative electrode and a positive electrode thereof, comprising the steps of:
- (a) detecting the temperature of the secondary battery;
(b) obtaining an internal resistance value of the secondary battery which corresponds to the detected temperature of the secondary battery;
(c) based on the detected temperature of the secondary battery and the obtained internal resistance value of the secondary battery, obtaining, as an optimum charging-current value, a maximum charging-current value up to which the temperature of the secondary battery does not reach an excessive temperature even if a charging current flows to the secondary battery; and
(d) supplying an electric current equivalent to the obtained optimum charging-current value to the secondary battery.
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Accused Products
Abstract
A non-aqueous electrolytic secondary battery which includes a heat-resistant layer formed by a porous protective film or the like having a resin binder and an inorganic oxide filler between its negative electrode and a positive electrode has such a characteristic that the higher the battery'"'"'s temperature becomes, the smaller its internal resistance value becomes. In a CC-CV charging method as a general method for charging a secondary battery, using such a characteristic that the internal resistance value of the non-aqueous electrolytic secondary battery lowers as the battery'"'"'s temperature rises, a VC-charge range where a charge is given using an optimum charging-current value at a maximum level up to which the battery'"'"'s temperature does not reach an excessive temperature even if a charging current flows is provided within a CC-charge range.
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Citations
8 Claims
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1. A method for quick charging a non-aqueous electrolytic secondary battery which includes a heat-resistant layer between a negative electrode and a positive electrode thereof, comprising the steps of:
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(a) detecting the temperature of the secondary battery; (b) obtaining an internal resistance value of the secondary battery which corresponds to the detected temperature of the secondary battery; (c) based on the detected temperature of the secondary battery and the obtained internal resistance value of the secondary battery, obtaining, as an optimum charging-current value, a maximum charging-current value up to which the temperature of the secondary battery does not reach an excessive temperature even if a charging current flows to the secondary battery; and (d) supplying an electric current equivalent to the obtained optimum charging-current value to the secondary battery. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Electric equipment comprising:
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a battery pack provided with a non-aqueous electrolytic secondary battery having a heat-resistant layer between a negative electrode and a positive electrode thereof; a charging-current supply section for charging the non-aqueous electrolytic secondary battery; and a charge control section which controls the charging current of the charging-current supply section, wherein the battery pack includes a temperature detection section which detects the temperature of the secondary battery, and the charge control section includes a battery-temperature acquisition section which acquires the temperature of the secondary battery detected by the temperature detection section, obtains, as an optimum charging-current value, a maximum charging-current value up to which the temperature of the secondary battery does not reach an excessive temperature even if a charging current flows to the secondary battery, based on the temperature of the secondary battery acquired by the battery-temperature acquisition section and an internal resistance value of the secondary battery which corresponds to the acquired temperature of the secondary battery, and sets the optimum charging-current value in the charging-current supply section.
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Specification