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US 8,803,479 B2Granted
Hybrid battery and its charging/discharging method
AssigneeSamsung SDI Co., Ltd.
InventorBongyoung Kim
Life of this patent
Estimating the term…
Abstract
A hybrid battery and its charging/discharging method automatically charges/discharges batteries having different capacities. The hybrid battery includes a plurality of rechargeable batteries; switching elements which are electrically connected to the plurality of rechargeable batteries having high current paths for electrically connecting to one of the high current paths; and a hybrid battery protection circuit electrically connected to the plurality of rechargeable batteries and driven by power supplied by one of the plurality of rechargeable batteries, the hybrid battery protection circuit charging/discharging the plurality of rechargeable batteries in sequence by transmitting an on/off signal to the switching element.
Claims20
A hybrid battery, comprising:
- a plurality of rechargeable batteries;
- a plurality of switching elements for battery selection, each switching element being respectively electrically connected to a high current path of one of the plurality of rechargeable batteries, the number of switching elements corresponding to that of the plurality of rechargeable batteries, each switching element for battery selection being formed of a P-channel field effect transistor;
- a switching element for charging/discharging including charging switching elements electrically connected to a junction point of all of the high current paths of all of the plurality of rechargeable batteries and discharging switching elements respectively electrically connected to the charging switching elements, each switching element for charging/discharging being formed of an N-channel field effect transistor;
- and
- a hybrid battery protection circuit including a plurality of voltage detectors with each voltage detector of the plurality of voltage detectors electrically connected between a switching element of the plurality of switching elements for battery selection and only one of the rechargeable batteries to compare the respective plurality of battery voltages of the plurality of rechargeable batteries with a reference voltage and to output a digital signal corresponding to the voltage value detected by the comparison;
- and
- a controller to receive a digital signal output from the plurality of voltage detectors, to select one of the plurality of batteries by outputting an on/off signal to one of the switching elements for battery selection, and to output an on/off signal to the charging/discharging switching element electrically connected to the high current path of the selected battery, the controller being electrically connected to the switching elements of the charging/discharging switching element.
4 more elements
A hybrid battery, comprising:
- a plurality of rechargeable batteries;
- a switching element for charging/discharging including switching elements for charging and switching elements for discharging, each one of the switching elements for charging being electrically connected to a respectively corresponding one of the plurality of rechargeable batteries and controlling the charging of the corresponding rechargeable batteries, and each one of the switching elements for discharging being electrically connected to a respectively corresponding one of the switching elements for charging and respectively controlling the discharging of the corresponding rechargeable batteries;
- and
- a hybrid battery protection circuit comprising:
- a plurality of voltage detectors electrically connected to the plurality of rechargeable batteries to compare voltages of the rechargeable batteries with a reference voltage and to output a digital signal according to the states of the rechargeable batteries, each voltage detector of the plurality of voltage detectors electrically connected between a switching element of the plurality of switching elements for charging/discharging and only one of the rechargeable batteries;
- a controller electrically connected to the switching elements for charging/discharging, the controller to receive a digital signal output from the voltage detector and to selectively output an on/off signal to the switching elements for charging/discharging;
- and
- an over current detector to detect current flowing in the rechargeable batteries and to turn off the switching element for charging/discharging.
5 more elements
A hybrid battery, comprising:
- a plurality of rechargeable batteries;
- a switching element for charging/discharging including switching elements for discharging and switching elements for charging, each one of the switching elements for discharging being electrically connected to a respectively corresponding one of a plurality of battery high current paths of the rechargeable batteries, the number of the switching elements corresponds to that of the plurality of rechargeable batteries, and the switching elements for charging being electrically connected to a high current path junction of the switching elements for discharging;
- and
- a hybrid battery protection circuit including a plurality of voltage detectors with each voltage detector of the plurality of voltage detectors electrically connected between a switching element of the plurality of switching elements and only one of the plurality of rechargeable batteries to compare voltages of the rechargeable batteries with a reference voltage and to output a digital signal corresponding to the voltage value detected by the comparison;
- and
- a controller electrically connected to switching elements for charging/discharging to receive a digital signal output from the plurality of voltage detectors and to selectively output an on/off signal to one of the switching elements for discharging and the switching elements for charging.
3 more elements
Dependencies are inferred from the claim text.