Nonaqueous electrolyte secondary battery and battery module

A battery module comprising single cells, each single cell comprising:

• a case;
• a nonaqueous electrolyte provided in the case;
• a positive electrode provided in the case;
• and
• a negative electrode provided in the case, the negative electrode comprising a negative electrode current collector and a negative electrode layer that is carried on the negative electrode current collector and contains negative electrode active material particles having a lithium insertion potential of 0.4V to about 3V (vs. Li/Li+), and the negative electrode current collector including an aluminum foil having an average crystal grain size of 0.01 to 50 μm or an aluminum alloy foil having an average crystal grain size of 0.01 to 50 μm.