Battery charging device
First Claim
1. A battery charging device comprising:
- a power supply coupler having the following components;
a first core, a primary coil located around the first core, and a case enclosing the first core and the primary coil;
a power receiver coupler including a second core for forming a magnetic path with said first core, a secondary coil located around the second core, and a case enclosing the second core and the secondary coil;
a power supply device connected to the primary coil;
a battery connected to the secondary coil, wherein the battery is charged by an inductive current generated in the secondary coil when electric power is supplied to the primary core by the power supply device; and
a temperature detector for detecting the temperature of the power supply coupler and for generating an electric signal for use in preventing the temperature of the components from exceeding a predetermined level.
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Accused Products
Abstract
A battery charging device includes a power supply coupler and a power receiver coupler. The power supply coupler includes a primary coil, a communication unit to communicate the power receiver coupler, a thermistor for detecting the temperature of the power supply coupler, and a communication interruption circuit for interrupting a communication signal when the predetermined value is detected by the thermistor. When the temperature of the power supply coupler exceeds the predetermined value, a signal is produced by the communication interruption circuit to prevent an excessive temperature rise in the power supply coupler. The signal may, for example, stop the supply of electric power to the power supply couple.
31 Citations
12 Claims
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1. A battery charging device comprising:
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a power supply coupler having the following components;
a first core, a primary coil located around the first core, and a case enclosing the first core and the primary coil;
a power receiver coupler including a second core for forming a magnetic path with said first core, a secondary coil located around the second core, and a case enclosing the second core and the secondary coil;
a power supply device connected to the primary coil;
a battery connected to the secondary coil, wherein the battery is charged by an inductive current generated in the secondary coil when electric power is supplied to the primary core by the power supply device; and
a temperature detector for detecting the temperature of the power supply coupler and for generating an electric signal for use in preventing the temperature of the components from exceeding a predetermined level. - View Dependent Claims (2, 3, 4, 5)
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6. A battery charging device comprising:
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a power supply coupler having the following components;
a first core, a primary coil located around the first core, and a case the first core and the primary coil;
a power receiver coupler including a second core for forming a magnetic path with the first core, a secondary coil located around the first core, and a case enclosing the second core and the secondary coil;
a power supply device for supplying an electric power to the primary coil;
a battery connected to the secondary coil, wherein the battery is charged by an inductive current generated in the secondary coil when electric power is supplied to the secondary coil from the power supply device;
a first communicating unit in the power receiver coupler for transmitting a first electric signal, which carries information related to the condition of the battery, to the power supply coupler;
a second communication unit in the power supply coupler, wherein the second communication unit responds to the first electric signal by transmitting the first electric signal as a second electric signal to the power supply device;
a temperature detector located in the power supply coupler for generating a third electric signal, wherein the third electric signal indicates whether a temperature in the power supply coupler has reached a predetermined value;
a communication interruption circuit connected to the temperature detector to receive the third electric signal, wherein the third electric signal interrupts the second electric signal when the temperature exceeds the predetermined value; and
a control unit in the power supply unit for controlling the electric power supplied to the primary coil in response to the second electric signal. - View Dependent Claims (7, 8, 9)
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10. A power supply coupler for the battery charging device having a temperature detector for detecting the temperature of the inside of the power supply coupler and for generating an electric signal when the temperature of the inside of the power supply coupler exceeds a predetermined level.
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11. A power supply coupler for a battery charging device, the power supply coupler being connected to a power supply device, which has a control unit for controlling a supply of electric power to the power supply coupler, wherein the battery charging device has a power receiver coupler that includes a first core and a secondary coil located around the first core, the power supply coupler comprising:
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a second core that forms a magnetic path with the first core when the power supply coupler is inserted into the power receiver coupler;
a primary core located around the second core and connected to the power supply device to receive the electric power;
a temperature detector for detecting a temperature of said power supply coupler and for producing an output signal when the temperature exceeds a predetermined value, which causes the control unit to stop the supply of electric power for preventing an excessive temperature rise beyond the predetermined value in the power supply coupler; and
a case enclosing the second core, the primary core and the temperature detection means. - View Dependent Claims (12)
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Specification