US 12,337,720 B2
Controlling a battery module comprising a plurality of switched battery cell units
Henrik Svärd, Saltsjö-Boo (SE)
Assigned to Scania CV AB, Södertälje (SE)
Appl. No. 17/781,654
Filed by Scania CV AB, Södertälje (SE)
PCT Filed Dec. 8, 2020, PCT No. PCT/SE2020/051176
§ 371(c)(1), (2) Date Jun. 1, 2022,
PCT Pub. No. WO2021/118436, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 1951438-9 (SE), filed on Dec. 12, 2019.
Prior Publication US 2023/0001823 A1, Jan. 5, 2023
Int. Cl. B60L 58/19 (2019.01); B60L 58/22 (2019.01); G01R 31/3835 (2019.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01); H01M 50/204 (2021.01); H01M 50/249 (2021.01); H01M 50/51 (2021.01); H01M 50/512 (2021.01); H02J 7/00 (2006.01)
CPC B60L 58/19 (2019.02) [B60L 58/22 (2019.02); G01R 31/3835 (2019.01); H01M 10/425 (2013.01); H01M 10/482 (2013.01); H01M 50/204 (2021.01); H01M 50/249 (2021.01); H01M 50/51 (2021.01); H01M 50/512 (2021.01); H02J 7/0013 (2013.01); H02J 7/007182 (2020.01); H01M 2220/20 (2013.01); H02J 7/0019 (2013.01)] 14 Claims
OG exemplary drawing
 
6. A battery module for a vehicle, said battery module comprising:
a plurality of battery cell units, each one comprising:
a battery cell having a first pole and a second pole; and
a switch circuit, comprising:
a first input connected to a first output via a first switch;
a second input connected to a second output via a second switch; and
a third switch, via which the second input is connected to the first output, and
wherein the first pole of the battery cell is connected to the first input of the switch circuit and the second pole is connected to the second input of the switch circuit,
a switch controller arranged to control the switches of the switch circuit to enter one of:
a first state in which the first input is connected to the first output via control of the first switch, and the second input is connected to the second output via control of the second switch, and the second input is disconnected from the first output via control of the third switch; and
a second state in which the first input is disconnected from the first output via control of the first switch, and the second input is disconnected from the second output via control of the second switch, and the second input is connected to the first output via control of the third switch,
wherein the switch controller comprises an input for receiving a probability signal that indicates a probability for the switch circuit to enter the first state or the second state;
a voltage regulator configured to measure an output voltage V at one of the first and second outputs, to compare the measured output voltage with a reference voltage Vref, said reference voltage Vref being in a range from a nominal minimum output voltage Vmin of the battery module to a nominal maximum output voltage Vmax of the battery module, and said voltage regulator being configured to generate a differential value d on basis of said comparison, and to generate a probability value p on basis of the differential value d, said probability value being proportional to an absolute value of the differential value d, and being within an interval representing from 0% to a value corresponding to 100% probability, and configured to transmit the probability value p to the switch controller; and
a random number generator configured to generate a random number r within said interval,
wherein the switch controller is configured to receive the random number r, and to compare the probability value p with the random number r, and:
a) if the switch circuit is in the first state and V-Vref<0, and p>r, the switch controller controls the switches to change the state of the switch controller to the second state; or
b) if the switch circuit is in the second state and V-Vref>0 and p>r, the switch controller controls the switches to change the state of the switch controller to the first state; or
c) if p=0, and the switch circuit is in the first state or in the second state, the state of the switch controller is not changed.