公开(公告)号：US20240258803A1

公开(公告)日：2024-08-01

申请号：US18162346

申请日：2023-01-31

Applicant: Apple Inc.

Inventor： Ashish K. Sahoo ,  Brandon Pierquet ,  Matteo Telli

IPC: H02J7/00 ,  H02J50/12 ,  H02M1/00 ,  H02M3/335

CPC classification number: H02J7/0019 ,  H02J50/12 ,  H02M1/0058 ,  H02M1/0095 ,  H02M3/33571

Abstract: A battery charging system can include a stacked half bridge rectifier (“SHBR”) having an upper half bridge (“UHB”) and a lower half bridge (“LHB”); a blocking capacitor and a winding coupled between a midpoint of the UHB and a midpoint of the LHB; a battery coupled across the SHBR; and control circuitry that can selectively operate the SHBR as a switched capacitor converter (“SCC”) using the blocking capacitor as a flying capacitor by alternating between: a first switching state in which lower switches of the UHB and LHB are closed while upper switches of the UHB and LHB are opened; and a second switching state in which upper switches of the UHB and LHB are closed. The battery can further include first and second series-connected batteries having a midpoint coupled to a midpoint of the SHBR, and the SCC can operate as a balancer to equalize charge between the batteries.

公开(公告)号：US20240258801A1

公开(公告)日：2024-08-01

申请号：US18162325

申请日：2023-01-31

Applicant: Apple Inc.

Inventor： Ashish K. Sahoo ,  Brandon Pierquet ,  Matteo Telli

IPC: H02J7/00 ,  H02J50/12 ,  H02M1/00 ,  H02M3/335

CPC classification number: H02J7/0014 ,  H02J50/12 ,  H02M1/0058 ,  H02M3/33571 ,  H02M3/33576

Abstract: A battery charging system can include a stacked half bridge rectifier having an upper half bridge (“UHB”) and a lower half bridge (“LHB”); a blocking capacitor and a winding coupled between a midpoint of the UHB and a midpoint of the LHB; a battery coupled between an upper terminal of the UHB and a lower terminal of the LHB; and control circuitry that can selectively operate the stacked half bridge rectifier as a switched capacitor converter using the blocking capacitor as a flying capacitor by alternating between: a first switching state in which lower switches of the UHB and LHB are closed while upper switches of the UHB and LHB are opened; and a second switching state in which upper switches of the UHB and LHB are closed; wherein the switched capacitor converter operates as a booster to charge the battery from a DC voltage lower than the battery voltage.