Drive Motor Battery System Description: Overview

The high voltage hybrid/EV battery contains 288 individual lithium-ion cells. Three cells are welded together in parallel and called a cell group. There are a total of 96 cell groups in the hybrid/EV battery assembly. These cell groups are electrically connected in series. Each individual cell group is rated at 3.65 V, for a nominal system voltage of 350 V direct current. The battery cell groups are electrically joined to form 10 distinct electrical modules. There are eight electrical modules comprised of 10 cell groups and two electrical modules comprised of 8 cell groups. Two battery cell modules are physically mounted together to form a section/row. Section/row 1 and 3 are interchangeable while section/row 2, 4 and 5 are unique to their location. With the exception of section/row 5, the two battery cell modules are not electrically connected within their respective section/row. The hybrid/EV battery pack contains a total of six battery temperature sensors mounted to certain battery cell modules. The hybrid/EV battery pack also contains a coolant inlet temperature sensor. Refer to Hybrid/EV Cooling System Description and Operation .

Located within the high voltage Hybrid/EV battery pack, the K16 battery energy control module monitors the temperature, current and voltage of the 96 battery cell groups. The voltage sense lines are attached to each individual cell group, and these sense lines terminate at a connector located on the end of the battery cell module. A voltage sense harness joins this connector to the K16 battery energy control module.

The K16 battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the K16 battery energy control module to the K114B hybrid powertrain control module 2 through serial data. The K114B hybrid powertrain control module 2 is the host controller for K16 battery energy control module diagnostic trouble code information.