Jig for improving adhesion between battery cell
Provided are a jig of improving adhesion between a battery cell and a metal plate, which improves the adhesion between the battery cell and the metal plate of the battery pack to improve quality of laser welding and a method using the same.
1. A jig for improving adhesion between a metal plate and each battery cell of a plurality of battery cells of a battery pack, the jig comprising:
a main frame having a plurality of inner spaces that are vertically defined and in which a through hole is defined upward in each of the inner spaces;
a movable part that is vertically movable in a respective one of the inner spaces and having a bottom surface on which a magnet is attached;
a pressing part on a top surface of the movable part to extend to the outside of the main frame through the through-hole and vertically movable as the movable part moves; and
a magnetic force generation part spaced a predetermined distance from the bottom surface of the movable part to push the magnet of the movable part through magnetic force.
2. The jig of claim 1 , wherein the through-hole of each respective inner space is defined to correspond to a respective one of the battery cells of the battery pack.
3. The jig of claim 1 , wherein the pressing part moves by the magnetic force between the movable part on which the pressing part is disposed and the magnetic force generation part so that one end of the pressing part pushes a bottom surface of the battery cell through the through-hole of a lower frame of the battery pack to allow the battery cell and the metal plate of an upper frame to adhere to each other.
4. The jig of claim 1 , wherein the magnetic force generation part generates the magnetic force having a same polarity as that of a permanent magnet of the movable part by using an electromagnet.
5. The jig of claim 1 , wherein each of the movable part and the magnetic force generation part is provided with an electromagnet, and
a power supply device connected to the movable part and the magnetic force generation part to generate repulsive force therebetween is further provided.