Battery module

1. A battery module, comprising:

a plurality of battery cells which are arranged to be stacked and are electrically connected to each other;

a plurality of partitions positioned between the battery cells and having aluminum panels fixed on upper and lower surfaces thereof;

a printed circuit board (PCB) electrically connected to the battery cell;

a bus bar electrically connected to the battery cell,

wherein the battery cell and the PCB are connected to each other by one or more voltage sensing wires positioned on the partitions and having one side which is in contact with a bus bar of the battery cell and the other side which is in contact with a PCB terminal formed on the PCB, and

wherein the bus bar is fixed onto the partition by inserting short bolts into a bus bar hole formed in the bus bar and a bus bar fixing hole formed in the partition.

2. The battery module of claim 1 , wherein the voltage sensing wire includes:

a bus bar contacting part which is formed at one side thereof and is in contact with the bus bar;

a PCB contacting part which is formed at the other side thereof and is in contact with the PCB terminal; and

a sensing cable electrically connecting the bus bar contacting part and the PCB contacting part to each other.

3. The battery module of claim 2 , wherein the bus bar contacting part has both sides formed to have steps and both sides of the bus bar contacting part are inserted and fixed into a first insertion groove formed in the partition, and

the PCB contacting part has both sides formed to have steps and both sides of the PCB contacting part are inserted and fixed into a second insertion groove formed in the partition.

4. The battery module of claim 3 , further comprising a temperature sensor positioned at a central portion of the partition,

wherein the temperature sensor transmits temperature data to the PCB.

5. The battery module of claim 2 , wherein the PCB contacting part and the PCB terminal are welded to each other by laser welding or spot welding.