公开(公告)号：US20210075214A1

公开(公告)日：2021-03-11

申请号：US16739277

申请日：2020-01-10

Applicant: Apple Inc.

Inventor： Samuel B. Schaevitz ,  Nicholas D. Shourounis ,  Justin D. Schunick

IPC: H02H9/00 ,  H02M3/04

Abstract: An electronic device can include a battery bus, a load having a transient power requirement, and a transient power management circuit coupled between the battery bus and the load and configured to meet the transient instantaneous power requirement of the load while maintaining a minimum voltage on the battery bus. The transient power management circuit can include a boost converter coupled between the battery bus and a capacitor bank, and the load may be coupled to the capacitor bank. A control circuit may be configured to operate the boost converter to charge the capacitor bank. A control switch may be coupled between the boost converter and the capacitor bank, and the control circuit may be further configured to limit inrush current into the capacitor bank. Additionally, a state of charge of the battery may be estimated from a time required to charge the capacitor bank.

公开(公告)号：US11233390B2

公开(公告)日：2022-01-25

申请号：US16739277

申请日：2020-01-10

Applicant: Apple Inc.

Inventor： Samuel B. Schaevitz ,  Nicholas D. Shourounis ,  Justin D. Schunick

IPC: H02H9/00 ,  H02M3/04

Abstract: An electronic device can include a battery bus, a load having a transient power requirement, and a transient power management circuit coupled between the battery bus and the load and configured to meet the transient instantaneous power requirement of the load while maintaining a minimum voltage on the battery bus. The transient power management circuit can include a boost converter coupled between the battery bus and a capacitor bank, and the load may be coupled to the capacitor bank. A control circuit may be configured to operate the boost converter to charge the capacitor bank. A control switch may be coupled between the boost converter and the capacitor bank, and the control circuit may be further configured to limit inrush current into the capacitor bank. Additionally, a state of charge of the battery may be estimated from a time required to charge the capacitor bank.