US 11,865,945 B2
Rechargeable energy storage system balancing apparatus
Mohamed Kamel, Rochester, MI (US); Chandra S. Namuduri, Troy, MI (US); Rashmi Prasad, Troy, MI (US); Muhammad Hussain Alvi, Troy, MI (US); and Lyall Kenneth Winger, Waterloo (CA)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Jun. 14, 2022, as Appl. No. 17/839,769.
Prior Publication US 2023/0398903 A1, Dec. 14, 2023
Int. Cl. B60L 58/22 (2019.01); H02M 7/537 (2006.01); B60L 53/60 (2019.01); H02J 1/10 (2006.01); B60L 58/18 (2019.01); H02M 1/00 (2006.01); H02J 7/00 (2006.01)
CPC B60L 58/22 (2019.02) [B60L 53/60 (2019.02); B60L 58/18 (2019.02); H02J 1/102 (2013.01); H02J 7/0019 (2013.01); H02M 1/007 (2021.05); H02M 1/0074 (2021.05); H02M 7/537 (2013.01); B60L 2210/10 (2013.01); B60L 2210/40 (2013.01); H02J 2310/48 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A rechargeable energy storage system, comprising:
a series arrangement of a plurality of batteries coupled to a first DC bus at a first DC voltage;
a DC to DC converter comprising:
a multi-input DC input stage coupled to a multi-output DC output stage;
the multi-input DC input stage including multiple distributed DC inputs, each distributed DC input coupled to a respective one of the plurality of batteries; and
the multi-output DC output stage including multiple aggregated DC outputs; and
at least one controllable switch for coupling one or more of the multiple aggregated DC outputs to one or more other DC buses;
wherein each aggregated DC output comprises multiple distributed DC outputs, each distributed DC output coupled to a respective distributed DC input, wherein the multiple distributed DC outputs are aggregated in series.