Variable pulse recharging battery pack

Claim 2

An electrically powered device, including a removable rechargeable battery pack for powering said electrically powered device, said battery pack comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery.

Claim 3

The electrically powered device of claim 1, wherein said charging circuit further comprises: a rectifier circuit means for fully rectifying the received AC current; a semiconductor switching means coupled to the rectifier circuit means for generating said pulse charging current from said rectified AC current and supplying said pulse charging current to said at least one battery; a ramp generator circuit, coupled to said rectifier circuit means, for generating a linearly rising waveform beginning at each zero crossing of the rectified AC current; a current sense amplifier circuit, coupled to the output terminal of said at least one battery, for measuring the average value of current through said at least one battery and generating a first DC level value proportional to said average charging value; and a triggering circuit for generating gate firing pulses for the semiconductor switching means according to said linearly rising waveform and said generated DC level value.

Claim 4

The electrically powered device of claim 2, wherein said charging circuit further comprises a number of capacitors in parallel between the semiconductor switch and said at least one battery for stabilizing said at least one battery impedance.

Claim 5

The electrically powered device of claim 2, further comprising a softstart circuit, between said at least one battery and said current sense amplifier circuit, for sending a decreasing current to said current sense amplifier circuit at initial reception of said input AC current thereby slowly increasing the pulse charge current to said at least one battery.

Claim 6

The electrically powered device of claim 2, further comprising an absolute temperature circuit, coupled to said current sense amplifier circuit, for sending current to said current sense amplifier circuit when a preset charging temperature is reached, forcing the current sense amplifier circuit to generate a second DC level greater than said first DC level, thereby pulse charging said at least one battery at a lower pulse charging level.

Claim 7

The electrically powered device of claim 2, further comprising an absolute time circuit, coupled to said current sense amplifier circuit, for sending current to said current sense amplifier circuit when a preset charging time is reached, forcing the current sense amplifier circuit to generate a second DC level greater than said first DC level, thereby pulse charging said at least one battery at a lower pulse charging level.

Claim 8

The electrically powered device of claim 1, wherein said at least one battery is a NiCd battery.

Claim 9

The electrically powered device of claim 1, wherein said at least one battery is a Nickel Metal Hydride battery.

Claim 10

A cellular phone, including a removable rechargeable battery pack, said battery pack comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery.

Claim 11

A cellular phone, including a removable rechargeable battery pack, said battery pack comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery.

Claim 12

The cellular phone of claim 9, wherein said recharging circuit comprises: a rectifier circuit means for fully rectifying the received AC current; a semiconductor switching means coupled to the rectifier circuit means for generating said pulse charging current from said rectified AC current and supplying said pulse charging current to said at least one battery; a ramp generator circuit, coupled to said rectifier circuit means, for generating a linearly rising waveform beginning at each zero crossing of the rectified AC current; a current sense amplifier circuit, coupled to the output terminal of said at least one battery, for measuring the average value of current through said at least one battery and generating a first DC level value proportional to said average charging value; and a triggering circuit for generating gate firing pulses for the semiconductor switching means according to said linearly rising waveform and said generated DC level value.

Claim 13

The cellular phone of claim 10, wherein said charging circuit further comprises a number of capacitors in parallel between the semiconductor switch and said at least one battery for stabilizing said at least one battery impedance.

Claim 14

The cellular phone of claim 10, further comprising a soft-start circuit, coupled between said output of said at least one battery and said current sense amplifier circuit, for sending a decreasing current to said current sense amplifier circuit at initial reception of said input AC current thereby slowly increasing the pulse charge current to said at least one battery.

Claim 15

The cellular phone of claim 10, further comprising an absolute temperature circuit, coupled to said current sense amplifier circuit, for sending current to said current sense amplifier circuit when a preset charging temperature is reached, forcing the current sense amplifier circuit to generate a second DC level greater than said first DC level, thereby pulse charging said at least one battery at a lower pulse charging level.

Claim 16

The cellular phone of claim 11, further comprising an absolute time circuit, coupled to said current sense amplifier circuit, for sending current to said current sense amplifier circuit when a preset charging time is reached, forcing the current sense amplifier circuit to generate a second DC level greater than said first DC level, thereby pulse charging said at least one battery at a lower pulse charging level.

Claim 17

The cellular phone of claim 9, wherein said at least one battery is a NiCd battery.

Claim 18

The cellular phone of claim 9, wherein said at least one battery is a Nickel Metal Hydride battery.

Claim 19

A cellular phone removable battery pack, comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery.

Claim 20

A cellular phone removable battery pack, comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery.

Claim 21

The cellular phone removable battery pack of claim 17, wherein said charging circuit further comprises: a rectifier circuit means for fully rectifying the received AC current; a semiconductor switching means coupled to the rectifier circuit means for generating said pulse charging current from said rectified AC current and supplying said pulse charging current to said at least one battery; a ramp generator circuit, coupled to said rectifier circuit means, for generating a linearly rising waveform beginning at each zero crossing of the rectified AC current; a current sense amplifier circuit, coupled to the output terminal of said at least one battery, for measuring the average value of current through said at least one battery and generating a first DC level value proportional to said average charging value; and a triggering circuit for generating gate firing pulses for the semiconductor switching means according to said linearly rising waveform and said generated DC level value.

Claim 22

The battery pack of claim 18, wherein said charging circuit further comprises a number of capacitors in parallel between the semiconductor switch and said at least one battery for stabilizing said at least one battery impedance.

Claim 23

The battery pack of claim 18, further comprising a soft-start circuit, coupled between said output of said at least one battery and said current sense amplifier circuit, for sending a decreasing current to said current sense amplifier circuit at initial reception of said input AC current thereby slowly increasing the pulse charge current to said at least one battery.

Claim 24

The battery pack of claim 18, further comprising an absolute temperature circuit, coupled to said current sense amplifier circuit, for sending current to said current sense amplifier circuit when a preset charging temperature is reached, forcing the current sense amplifier circuit to generate a second DC level greater than said first DC level, thereby pulse charging said at least one battery at a lower pulse charging level.

Claim 25

The battery pack of claim 18, further comprising an absolute time circuit, coupled to said current sense amplifier circuit, for sending current to said current sense amplifier circuit when a preset charging time is reached, forcing the current sense amplifier circuit to generate a second DC level greater than said first DC level, thereby pulse charging said at least one battery at a lower pulse charging level.

Claim 26

The battery pack of claim 17, wherein said at least one battery is a NiCd battery.

Claim 27

The battery pack of claim 17, wherein said at least one battery is a Nickel Metal Hydride battery.

Claim 28

An electrically powered device, including a removable rechargeable battery pack for powering said electrically powered device, said battery pack comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery, said pulse charging circuit further comprising: a rectifier circuit means for fully rectifying the received AC current; a semiconductor switching means coupled to the rectified circuit means for generating said pulse charging current from said rectified AC current and supplying said pulse charging current to said at least one battery; a ramp generator circuit, coupled to said rectified circuit means, for generating a linearly rising waveform beginning at each zero crossing of the rectified AC current; a current sense amplifier circuit, coupled to the output terminal of said at least one battery, for measuring the average value of current through said at least one battery and generating a first DC level value proportional to said average charging value; and a triggering circuit for generating gate firing pulses for the semiconductor switching means according to said linearly rising waveform and said generated DC level value.

Claim 29

An electrically powered device, including a removable rechargeable battery pack for powering said electrically powered device, said battery pack comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery, said pulse charging circuit further comprising: a rectifier circuit means for fully rectifying the received AC current; a semiconductor switching means coupled to the rectified circuit means for generating said pulse charging current from said rectified AC current and supplying said pulse charging current to said at least one battery; a ramp generator circuit, coupled to said rectified circuit means, for generating a linearly rising waveform beginning at each zero crossing of the rectified AC current; a current sense amplifier circuit, coupled to the output terminal of said at least one battery, for measuring the average value of current through said at least one battery and generating a first DC level value proportional to said average charging value; and a triggering circuit for generating gate firing pulses for the semiconductor switching means according to said linearly rising waveform and said generated DC level value.

Claim 30

A cellular phone, including a removable rechargeable battery pack, said battery pack comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery, said pulse charging circuit comprising: a rectifier circuit means for fully rectifying the received AC current; a semiconductor switching means coupled to the rectifier circuit means for generating said pulse charging current from said rectified AC current and supplying said pulse charging current to said at least one battery; a ramp generator circuit, coupled to said rectifier circuit means, for generating a linearly rising waveform beginning at each zero crossing of the rectified AC current; a current sense amplifier circuit, coupled to the output terminal of said at least one battery, for measuring the average value of current through said at least one battery and generating a first DC level value proportional to said average charging value; and a triggering circuit for generating gate firing pulses for the semiconductor switching means according to said linearly rising waveform and said generated DC level value.

Claim 31

A cellular phone, including a removable rechargeable battery pack, said battery pack comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery, said pulse charging circuit comprising: a rectifier circuit means for fully rectifying the received AC current; a semiconductor switching means coupled to the rectifier circuit means for generating said pulse charging current from said rectified AC current and supplying said pulse charging current to said at least one battery; a ramp generator circuit, coupled to said rectifier circuit means, for generating a linearly rising waveform beginning at each zero crossing of the rectified AC current; a current sense amplifier circuit, coupled to the output terminal of said at least one battery, for measuring the average value of current through said at least one battery and generating a first DC level value proportional to said average charging value; and a triggering circuit for generating gate firing pulses for the semiconductor switching means according to said linearly rising waveform and said generated DC level value.

Claim 32

A cellular phone removable battery pack, comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery, said pulse charging circuit further comprising: a rectifier circuit means for fully rectifying the received AC current; a semiconductor switching means coupled to the rectifier circuit means for generating said pulse charging current from said rectified AC current and supplying said pulse charging current to said at least one battery; a ramp generator circuit, coupled to said rectifier circuit means, for generating a linearly rising waveform beginning at each zero crossing of the rectified AC current; a current sense amplifier circuit, coupled to the output terminal of said at least one battery, for measuring the average value of current through said at least one battery and generating a first DC level value proportional to said average charging value; and a triggering circuit for generating gate firing pulses for the semiconductor switching means according to said linearly rising waveform and said generated DC level value.

Claim 33

A cellular phone removable battery pack, comprising: at least one rechargeable battery; and a transformerless pulse charging circuit for receiving an input AC current and a current value from said at least one battery, generating a pulse charging current proportional to said received AC current and current value, and charging said at least one rechargeable battery by applying said pulse charging current to said at least one battery, said pulse charging circuit further comprising: a rectifier circuit means for fully rectifying the received AC current; a semiconductor switching means coupled to the rectifier circuit means for generating said pulse charging current from said rectified AC current and supplying said pulse charging current to said at least one battery; a ramp generator circuit, coupled to said rectifier circuit means, for generating a linearly rising waveform beginning at each zero crossing of the rectified AC current; a current sense amplifier circuit, coupled to the output terminal of said at least one battery, for measuring the average value of current through said at least one battery and generating a first DC level value proportional to said average charging value; and a triggering circuit for generating gate firing pulses for the semiconductor switching means according to said linearly rising waveform and said generated DC level value.