Multi-functional portable power charger
A portable charger capable of jump starting a 12 V car battery includes a charger battery, a jump start circuit operatively electrically connected with the charger battery and with an ignition power outlet, and a microcontroller for coordinating safety functions to establish or interrupt the operative electrical connection of the jump start circuit with the ignition power outlet. The ignition power outlet comprises a positive power socket, a negative power socket, a positive sensing socket and a negative sensing socket. The sensing sockets are electrically isolated from the power sockets, and the microcontroller senses voltage across the sensing sockets and is configured to interrupt the operative electrical connection of the jump start circuit to the ignition power outlet until proper voltage is sensed across the sensing sockets.
1. A portable charger capable of outputting both AC and DC power, comprising:
a charger battery;
a USB power circuit operatively electrically connected with the charger battery and with a USB power outlet;
an AC inverter circuit operatively electrically connected with the charger battery and with a wireless transmitter;
a jump start circuit operatively electrically connected with the charger battery and with an ignition power outlet, said ignition power outlet comprising a positive power socket and a negative power socket respectively associated with a positive jumper cable jack and a negative jumper cable jack; and
a microcontroller configured to establish or interrupt the operative electrical connections of the USB power circuit, the AC inverter circuit, and the jump start circuit with the ignition power outlet in response to system parameters measured by a safety circuit in operative communication with the microcontroller,
said safety circuit comprising:
a voltage input analyzer to measure voltage across the positive and negative jumper cable jacks;
a reverse current protector including an operational amplifier operatively connected to a negative terminal of the charger battery to determine if the positive and negative jumper cable jacks are properly connected to a battery in need of a recharge based on the detection of a reverse current across the operational amplifier; and
a reverse polarity detector to measure the polarity across the positive and negative jumper cable jacks.
2. The portable charger according to claim 1 , wherein the microcontroller is configured to interrupt the operative electrical connection of the jump start circuit to the ignition power outlet if at least one of the following system parameters is measured by the safety circuit:
an insufficient voltage across the positive and negative jumper cable jacks;
(ii) a reverse current across the positive and negative jumper cable jacks; and
(iii) a reverse polarity across the positive and negative jumper cable jacks.
3. The portable charger according to claim 1 , further comprising an AC power outlet electrically connected with the AC converter circuit.
4. The portable charger according to claim 1 , wherein said ignition power outlet further comprising a positive sensing socket and a negative sensing socket, wherein the positive and negative sensing sockets are electrically isolated from the positive and negative power sockets; wherein the microcontroller senses voltage across the positive and negative sensing sockets.
5. The portable charger according to claim 4 , wherein the microcontroller senses voltage across the positive and negative sensing sockets and is configured to interrupt the operative electrical connection of the jump start circuit to the ignition power outlet until proper voltage is sensed across the positive and negative sensing sockets.
6. The portable charger according to claim 1 , further comprising a power switch for manually controlling the mode of operation of the portable charger between AC power, USB power, and jump start power.
7. The portable power charger according to claim 1 , further comprising an AC input operatively connected with the charger battery for recharging of said charger battery when the AC input is connected with an external power source.
8. The portable charger according to claim 7 , wherein said AC input comprises a wireless receiver in operative communication with the charger battery.
9. A portable charger capable of outputting both AC and DC power, comprising:
a charger battery disposed within a charger housing;
a USB power circuit operatively electrically connected with the charger battery and also with a USB power outlet;
an AC inverter circuit operatively electrically connected with the charger battery and with a wireless AC power outlet;
a jump start circuit operatively electrically connected with the charger battery and with an ignition power outlet, said ignition power outlet comprising a positive power socket, a negative power socket, a positive sensing socket and a negative sensing socket, wherein the positive and negative sensing sockets are electrically isolated from the positive and negative power sockets; and
a microcontroller configured to establish or interrupt the operative electrical connections of the USB power circuit, the AC inverter circuit and the jump start circuit with the ignition power outlet in response to system parameters;
wherein the microcontroller senses voltage across the positive and negative sensing sockets and is configured to interrupt the operative electrical connection of the jump start circuit to the ignition power outlet until proper voltage is sensed across the positive and negative sensing sockets.
10. The portable charger according to claim 9 , wherein the system parameters evaluated by the microcontroller establish or interrupt the operative electrical connections of the USB power circuit, the AC inverter circuit, and the jump start circuit with the ignition power outlet are measured by a safety circuit in operative communication with the microcontroller,
said safety circuit comprising:
a voltage input analyzer to measure voltage across the positive and negative jumper cable jacks;
a reverse current protector including an operational amplifier operatively connected to a negative terminal of the charger battery to determine if the positive and negative jumper cable jacks are properly connected to a battery in need of a recharge based on the detection of a reverse current across the operational amplifier; and
a reverse polarity detector to measure the polarity across the positive and negative jumper cable jacks; and
a thermistor operatively connected with a temperature cutout terminal to measure the temperature of the charger battery.
11. The portable charger according to claim 10 , wherein the microcontroller is configured to interrupt the operative electrical connection of the jump start circuit to the ignition power outlet if at least one of the following system parameters is measured by the safety circuit:
an insufficient voltage across the positive and negative jumper cable jacks;
(ii) an excessive voltage across the positive and negative jumper cable jacks;
(iii) a reverse current across the positive and negative jumper cable jacks;
(iv) a reverse polarity across the positive and negative jumper cable jacks; and
(v) an excessive temperature measured in the charger battery.
12. The portable charger according to claim 9 , further comprising an AC power outlet electrically connected with the AC converter circuit.
13. The portable power charger according to claim 9 , further comprising an AC input operatively connected with the charger battery for recharging of said charger battery when the AC input is connected with an external power source.
14. The portable charger according to claim 13 , wherein said AC input comprises a wireless receiver in operative communication with the charger battery.
15. The portable charger according to claim 9 , further comprising a power switch for manually controlling the mode of operation of the portable charger between AC power, USB power, and jump start power.