US 12,152,912 B2
Wireless process variable transmitter with battery power source
Brian Lee Westfield, Victoria, MN (US); Theodore Henry Schnaare, Carver, MN (US); Cory Michael Robinson, Mayer, MN (US); and Nicholas Aaron Wienhold, Waconia, MN (US)
Assigned to Rosemount Inc., Shakopee, MN (US)
Filed by Rosemount Inc., Shakopee, MN (US)
Filed on Sep. 27, 2021, as Appl. No. 17/486,112.
Prior Publication US 2023/0098203 A1, Mar. 30, 2023
Int. Cl. G01D 21/02 (2006.01); H01M 6/50 (2006.01); H02J 1/00 (2006.01); H02J 7/00 (2006.01); H02J 13/00 (2006.01)
CPC G01D 21/02 (2013.01) [H01M 6/5044 (2013.01); H02J 1/00 (2013.01); H02J 7/0013 (2013.01); H02J 13/00022 (2020.01)] 21 Claims
OG exemplary drawing
 
1. A wireless process variable transmitter for use in an industrial process, comprising:
a process variable sensor configured to sense a process variable of the industrial process and provide a process variable sensor output;
measurement circuitry coupled to the process variable sensor configured to provide an output related to the process variable sensor output;
wireless communication circuitry coupled to the measurement circuitry configured to wirelessly communicate information related to the process variable sensor output to a remote location;
a battery power source comprising a plurality of battery power banks each comprising:
a primary cell battery;
a low voltage cut-off circuit electrically connected to the primary cell battery which provides an electrical connection to the primary cell battery while a voltage of the primary cell battery is above a threshold;
an ideal diode having an input electrically connected to the primary cell battery through the low voltage cut-off and providing a power bank output;
a power sharing node having an input connected to the battery power bank output of each of the plurality of battery power banks and having a shared power output comprising an electrical current from at least one primary cell battery in the plurality of battery power banks;
a power supply circuit electrically connected to the shared power output configured to provide power to the measurement circuitry and the wireless communication circuitry using power from at least one primary cell battery in the plurality of power banks; and
wherein each of the plurality of power banks includes at least three ideal diodes connected in series to thereby provide intrinsic safety.