Patent ID: 11923706
Assignee: GOOGLE LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A switched multi-cell battery system for an electronic device, the switched multi-cell battery system comprising:
an input voltage node;
an output voltage node;
a ground node;
a plurality of rechargeable battery cells comprising at least a first rechargeable battery cell with a positive terminal and a negative terminal and a second rechargeable battery cell with a positive terminal and a negative terminal;
a plurality of power control switches comprising at least:
a first power control switch having a gate terminal, a first channel terminal coupled to the input voltage node, and a second channel terminal coupled to the positive terminal of the first rechargeable battery cell;
a second power control switch having a gate terminal, a first channel terminal coupled to the second channel terminal of the first power control switch, and a second channel terminal coupled to the output voltage node;
third and fourth power control switches coupled between the second channel terminal of the second power control switch and the ground node;
a fifth power control switch having a gate terminal, a first channel terminal coupled to the input voltage node, and a second channel terminal coupled to the positive terminal of the second rechargeable battery cell;
a sixth power control switch having a gate terminal, a first channel terminal coupled to the second channel terminal of the fifth power control switch, and a second channel terminal coupled to the output voltage node;
seventh and eighth power control switches coupled between the second channel terminal of the sixth power control switch and the ground node; and

a power management integrated controller, the power management integrated controller configured to:
during a first phase of a duty cycle, control the plurality of power control switches effective to (i) couple the first and second rechargeable battery cells in series between the input voltage node and the ground node and (ii) couple the second rechargeable battery cell between the output voltage node and the ground node; and
during a second phase of the duty cycle, control the plurality of power control switches effective to (i) couple the first and second rechargeable battery cells in series between the input voltage node and the ground node and (ii) couple the first rechargeable battery cell between the output voltage node and the ground node.