Protection circuit and battery pack
AssigneeMitsumi Electric Co., Ltd.
InventorsKouhei Shibata, Junji Takeshita
Life of this patent
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Abstract
A protection circuit includes a detector to detect an overcharging or an excessive discharging of a battery, from a voltage of a power terminal coupled to the battery, a controller to generate a control signal to stop the charging or the discharging of the battery when a detection of the overcharging or the excessive discharging is continuously detected by the detector for a predetermined time, and a current varying circuit to vary a current flowing through the power terminal only for a certain time when the detector detects the overcharging or the excessive discharging of the battery.
Claims10
A protection circuit comprising:
- a detector configured to detect an overcharging or an excessive discharging of a battery, from a voltage of a power terminal coupled to the battery;
- a controller configured to generate a control signal to stop the charging or the discharging of the battery when a detection of the overcharging or the excessive discharging is continuously detected by the detector for a predetermined time;
- and
- a current varying circuit configured to vary a current flowing through the power terminal only for a certain time when the detector detects the overcharging or the excessive discharging of the battery.
A battery pack comprising:
- a battery;
- and
- a protection circuit including a power terminal to which the battery is coupled,
- said protection circuit comprising:
- a detector configured to detect an overcharging or an excessive discharging of the battery, from a voltage of the power terminal coupled to the battery;
- a controller configured to generate a control signal to stop the charging or the discharging of the battery when a detection of the overcharging or the excessive discharging is continuously detected by the detector for a predetermined time;
- and
- a current varying circuit configured to vary a current flowing through the power terminal only for a certain time when the detector detects the overcharging or the excessive discharging of the battery.
Dependencies are inferred from the claim text.