Hybrid battery pack
AssigneeNVIDIA Corporation
InventorsJevons Hua, Paul Su, Simon Xu
Life of this patent
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Abstract
A power source for supplying power to a mobile computing system comprising a Li polymer battery coupled in parallel with a supercapacitor cell battery. The Li polymer battery supplies substantially all the continuous currents demanded by the system load. The supercapacitor cell battery supplies substantially all the transient current demanded by the system load. The Li polymer battery may charge the supercapacitor cell battery when the voltage difference is larger than the difference caused by internal impedance difference.
Claims20
A power source for supplying power to a mobile computing system, said power source comprising:
- a first battery operable to supply substantially all demanded current to said mobile computing system when said demanded current is below a threshold rate;
- and
- a second battery coupled in parallel with said first battery;
- wherein said second battery is configured to have significantly smaller internal impedance than said first battery;
- wherein said second battery is configured to have significantly larger power density than said first battery;
- wherein said second battery is configured to have significantly smaller energy density than said first battery;
- and
- wherein further said first battery is operable to charge said second battery upon a voltage of said second battery being below a threshold voltage.
A mobile computing system comprising:
- a power source comprising a primary battery and a secondary battery coupled in parallel with said primary battery;
- a system load coupled to said power source and comprising:
- a display panel;
- a bus;
- a main processor and a memory;
- wherein said primary battery is operable to supply substantially all demanded current to said system load while said demanded current is below a threshold rate;
- wherein said secondary battery is configured to have significantly smaller internal impedance than said primary battery;
- wherein said secondary battery is configured to have significantly larger power density than said primary battery;
- wherein said secondary battery is configured to have significantly smaller energy density than said primary battery;
- wherein said primary battery is operable to charge said secondary battery when a voltage of said secondary battery is below a threshold voltage;
- and
- wherein further both said primary and said secondary battery are rechargeable through an external AC power supply.
The method for supplying power to a mobile computing system, said method comprising:
- supplying substantially all current from a primary battery to said computing system if said computing device draws current below a threshold rate;
- and
- supplying substantially all current from a secondary battery to said computing system if said computing device draws current above said threshold rate;
- wherein said primary battery is coupled with said secondary battery in parallel;
- and
- wherein both said primary and said secondary battery are rechargeable through an external AC power supply.
Dependencies are inferred from the claim text.