Battery charger and charge control system
First Claim
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1. A battery system for charging a plurality of lithium-ion cells, comprising:
- charging circuitry adapted to be coupled to said plurality of lithium-ion cells and configured to supply a charge to said plurality of lithium-ion cells to charge each of the plurality of lithium-ion cells to a voltage in a range of about 4.1 volts to about 4.3 volts with a voltage input to the charging circuitry in a range of about 4.1 volts to about 4.5 volts per lithium-ion cell; and
charge control circuitry coupled to the charging circuitry and operable to manage operation of the charging circuitry.
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Abstract
A battery charger and charge control system charges series connected lithium-ion batteries to a voltage in the range of about 4.1 volts and about 4.3 volts per battery with a voltage input to the system in the range of about 4.1 to about 4.5 volts per battery. Switching efficiencies associated with the system allow the charging and charge control circuitry of the system to be positioned within the battery housing. The charging and charge control circuitry may mount onto a single circuit board. Morever, the battery charger and charge control system allows the lithium-ion batteries to simultaneously charge and discharge.
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Citations
51 Claims
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1. A battery system for charging a plurality of lithium-ion cells, comprising:
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charging circuitry adapted to be coupled to said plurality of lithium-ion cells and configured to supply a charge to said plurality of lithium-ion cells to charge each of the plurality of lithium-ion cells to a voltage in a range of about 4.1 volts to about 4.3 volts with a voltage input to the charging circuitry in a range of about 4.1 volts to about 4.5 volts per lithium-ion cell; and
charge control circuitry coupled to the charging circuitry and operable to manage operation of the charging circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A battery system, comprising:
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a battery housing configured to house at least one lithium-ion cell;
charging circuitry positioned within the battery housing and operable to supply a charge to the lithium-ion cell;
charge control circuitry positioned within the battery housing and being electronically coupled to the charging circuitry to manage operation of the charging circuitry. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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- 33. A method of charging a plurality of lithium-ion cells having circuitry adapted to be coupled to and supply power to a plurality of lithium-ion cells, comprising charging each of the plurality of lithium-ion cells to a voltage in a range of about 4.1 volts and about 4.3 volts with a voltage input to the circuitry in a range of about 4.1 volts and about 4.5 volts per each lithium-ion cell of the plurality of lithium-ion cells.
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44. A method of charging at least one lithium-ion cell housed within a battery housing, the lithium-ion cell being supplied charge from charging circuitry, wherein operation of the charging circuitry is managed by charge control circuitry, comprising:
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positioning the charging circuitry within the battery housing such that the charging circuitry operatively couples to the lithium-ion cell; and
locating the charge control circuitry within the battery housing such that the charge control circuitry electrically couples to the charging circuitry. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51)
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Specification