Patent ID: 8895176

Claim:
A rechargeable lithium battery module for an integrated starter and generator (ISG) having a driving voltage range of 13.6 V to 15.6 V, the rechargeable lithium battery module comprising: a first rechargeable lithium battery cell comprising: a positive electrode comprising a first positive active material; and a negative electrode comprising a first negative active material; and a second rechargeable lithium battery cell in series with the first rechargeable lithium battery cell, the second rechargeable lithium battery cell comprising: a positive electrode comprising at least one of the first positive active material and a second positive active material different from the first positive active material; and a negative electrode comprising at least one of the first negative active material and a second negative active material different from the first negative active material, wherein the rechargeable lithium battery module is configured to supply power to the ISG and has an output voltage in the ISG driving voltage range of 13.6 V to 15.6 V.