| 主权项 |
1. A heating system for a battery module, the battery module having first and second battery cell groups, the first battery cell group having at least first and second battery cells electrically coupled in parallel with one another between a first node and a second node, the second battery cell group having at least third and fourth battery cells electrically coupled in parallel with one another between the second node and a third node, comprising:
a first voltage sensor configured to generate a first signal indicative of a first voltage level being output by the first battery cell group, the first voltage sensor being electrically coupled to and between the first node and the second node; a second voltage sensor configured to generate a second signal indicative of a second voltage level being output by the second battery cell group, the second voltage sensor being electrically coupled to and between the second node and the third node; a series combination of a first resistor and first, second, and third switches being electrically coupled in series between the first node and the second node, the first resistor being electrically coupled in parallel to the first battery cell group when the first, second, and third switches each have a first operational position to discharge the first battery cell group through the first, second, and third switches and the first resistor; a temperature sensor configured to generate a temperature signal indicative of a temperature level of at least one of the first battery cell group and the second battery cell group; a computer operably coupled to the first voltage sensor, the second voltage sensor, and the temperature sensor such that the computer receives the first signal, the second signal, and the temperature signal, respectively; the computer further programmed to select the first battery cell group to be at least partially discharged if both the first voltage level is greater than the second voltage level, and the temperature level is less than the threshold temperature level; the computer further programmed to generate first, second, and third control signals to induce the first, second, and third switches, respectively, to each have the first operational position to at least partially discharge the first battery cell group through the first resistor to generate heat energy in the first resistor, if the first battery cell group is selected; and the computer further programmed to generate a fourth control signal to turn on a fan to distribute the heat energy in the battery module to increase the temperature level of the battery module. |
