Battery pack that provides precise voltage measurements of batteries when safety switch is present

A battery pack, comprising:

• a plurality of battery assemblies, each battery assembly comprising a plurality of unit batteries;
• at least one safety switch electrically connected between electrically opposite poles of neighboring battery assemblies among the plurality of battery assemblies;
• and
• a plurality of sensing lines connected to electrically distinct ends of each of the plurality of battery assemblies to measure voltages of the plurality of battery assemblies, with the quantity of the sensing lines equaling a sum of the number of the battery assemblies, and the number of the safety switches, and plus one.

A battery pack, comprising:

• a plurality of secondary batteries being divided into n battery assemblies, where n is a positive integer;
• at least one safety switch electrically connected between electrically opposite poles of neighboring batteries among the plurality of secondary batteries;
• a first sensing line electrically connected to one end of the safety switch;
• and
• a plurality of second sensing lines electrically connected to nodes located between the n battery assemblies.