BATTERY CHARGING SYSTEM, A BATTERY OPERATED SYSTEM AND A METHOD FOR STATE CONTROLLED CHARGING
First Claim
1. A battery charging system comprisinga first path for supplying charging current from an energy source to a battery;
- a second path, in parallel with the first path, for supplying charging current from a controlled charging device to the battery;
a control unit for controlling the supply of charging current along the first and second paths in response to a detected state of the battery, wherein the control unit is configured tocommunicate with a first state sensor for receiving information regarding the detected state of the battery, and tocontrol the supply of charging current along the first and second paths such that the battery receives charging current from the controlled charging device via the second path, and not from the energy source via the first path, in response to detection of a state of the battery above a predetermined first threshold.
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Abstract
A battery charging system (15) and method for state controlled charging of a battery (12). The battery charging system comprises two parallel paths (16, 17) for supplying charging current to the battery (12) from two parallel sources of charging current, an energy source (13) and a controlled charging device (14). A control unit (18) is adapted to control the supply of charging current along the two paths in response to a detected state of the battery (12). If a state above a predetermined threshold is detected, the control unit (18) controls the supply of charging current such that the battery (12) receives charging current from the controlled charging device (14), but not directly from the energy source (13). The detected state of the battery may e.g. be a temperature state. The present invention allows for balancing the demands of high charging rate and long expected lifetime of the battery (12).
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Citations
15 Claims
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1. A battery charging system comprising
a first path for supplying charging current from an energy source to a battery; -
a second path, in parallel with the first path, for supplying charging current from a controlled charging device to the battery; a control unit for controlling the supply of charging current along the first and second paths in response to a detected state of the battery, wherein the control unit is configured to communicate with a first state sensor for receiving information regarding the detected state of the battery, and to control the supply of charging current along the first and second paths such that the battery receives charging current from the controlled charging device via the second path, and not from the energy source via the first path, in response to detection of a state of the battery above a predetermined first threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for state controlled charging of a battery comprising
detecting a state of the battery, and supplying charging current to the battery in response to the detected state of the battery, wherein the supply of charging current to the battery is controlled such that the battery receives charging current from an energy source via a first path and from a controlled charging device via a second path, in parallel with the first path, until a state above a predetermined first threshold is detected, and when the state above the predetermined first threshold is detected, the supply of charging current to the battery is controlled such that the battery receives charging current from the controlled charging device but not from the energy source via the first path.
Specification