US 12,222,402 B2
Apparatus and method for measuring battery cell voltage
Thomas Patrick Harvey, Novi, MI (US)
Assigned to Renesas Electronics America Inc., Milpitas, CA (US)
Filed by Renesas Electronics America Inc., Milpitas, CA (US)
Filed on May 12, 2022, as Appl. No. 17/742,505.
Prior Publication US 2023/0366947 A1, Nov. 16, 2023
Int. Cl. G01R 31/396 (2019.01); G01R 31/3835 (2019.01); H02J 7/00 (2006.01)
CPC G01R 31/396 (2019.01) [G01R 31/3835 (2019.01); H02J 7/00032 (2020.01); H02J 7/0047 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An apparatus comprising a first battery management circuit, the first battery management circuit being configured to:
measure a voltage of a first battery cell of a battery pack;
generate a first voltage measurement based at least in part on the measured voltage of the first battery cell;
receive a bit of a first response from a second battery management circuit, the bit of the first response being generated by the second battery management circuit based at least in part on a measured voltage of a second battery cell of the battery pack;
sum the bit of the first response with a corresponding bit of the first voltage measurement; and
provide the summed bit to a third battery management circuit as part of a second response,
wherein:
the first response comprises a first plurality of bits;
the second response comprise a second plurality of bits; and
the first battery management circuit is configured to:
receive the first response from the second battery management circuit bit-by-bit;
provide the second response to the third battery management circuit bit-by-bit; and
delay providing the bits of the second response to the third battery management circuit by one bit time relative to the receipt of corresponding bits of the first response.