US 11,791,642 B2
Safe battery energy management systems, battery management system nodes, and methods
Seth Marshall Kahn, San Francisco, CA (US); Anthony John Stratakos, San Anselmo, CA (US); Corrado Cammi, Mountain View, CA (US); Anderson Rennie John, Santa Clara, CA (US); and Kin Keung Lau, Belmont, CA (US)
Assigned to Element Energy, Inc., Menlo Park, CA (US)
Filed by Element Energy, Inc., Menlo Park, CA (US)
Filed on Oct. 6, 2021, as Appl. No. 17/495,011.
Application 17/212,787 is a division of application No. 17/066,238, filed on Oct. 8, 2020, granted, now 10,992,149, issued on Apr. 27, 2021.
Application 17/495,011 is a continuation in part of application No. 17/212,787, filed on Mar. 25, 2021, granted, now 11,258,279.
Prior Publication US 2022/0115879 A1, Apr. 14, 2022
Int. Cl. H02J 7/00 (2006.01); H01M 10/42 (2006.01)
CPC H02J 7/0036 (2013.01) [H01M 10/4235 (2013.01); H01M 10/4257 (2013.01); H02J 7/0063 (2013.01); H01M 2010/4271 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A battery stack, comprising:
a plurality of batteries electrically coupled in series;
a plurality of switches, the plurality of switches including:
a respective isolation switch for each battery, each isolation switch being configured to selectably isolate its respective battery from other batteries of the battery stack, and
a respective bypass switch for each battery, each bypass switch being configured to selectably provide a path for electrical current flowing through the battery stack to bypass its respective battery; and
a controller configured to control the plurality of switches such that each battery can be individually connected to and disconnected from an electrical power source/sink,
the controller and the plurality of switches being collectively configured such that the battery stack is capable of operating in a plurality of stack operating modes, the plurality of stack operating modes including a normal charge mode, a normal discharge mode, a bypass mode, and one or more of a floating mode and a safe mode.