Battery system improving operation reliability of swelling CID

1. A battery system improving operation reliability of a swelling current interrupt device (CID) including a battery part having a cathode, an anode, and an electrolyte, a lead tab configured to connect the battery part to an exterior, the swelling current interrupt device (CID) disposed between the battery part and the lead tab, and a pouch configured to house the battery part and the swelling CID, the battery system comprising:

a cooling plate adhered to the pouch to cool the battery part; and

a swelling aperture formed in the cooling plate to accommodate a concentrated expansion of the pouch.

2. The battery system according to claim 1 , wherein the swelling CID includes:

a battery part connecting terminal electrically connected to the battery part; and

a lead tab connecting terminal disposed on a lower surface of the battery part connecting terminal to be electrically connected to the battery part connecting terminal, and electrically connected to the lead tab.

3. The battery system according to claim 2 , wherein the battery part connecting terminal includes:

a bending surface part in contact with the lead tab connecting terminal, is formed to be bent to induce deformation of the battery part connecting terminal, and protrudes to the lower surface of the battery part connecting terminal; and

an adhesive part adhered to the lead tab connecting terminal and the pouch.

4. The battery system according to claim 2 , wherein an upper surface of the battery part connecting terminal is adhered to the pouch and the remaining portion except for a cut portion of a lower surface of the lead tab connecting terminal is attached to the pouch.

5. The battery system according to claim 4 , wherein the cut portion is provided with a V-notching which induces a cutting of the lead tab connecting terminal.

6. The battery system according to claim 1 , wherein the pouch includes:

a center part that covers the battery part; and

an edge part that extends from the center part.

7. The battery system according to claim 6 , wherein the cooling plate includes:

a swelling suppression part in contact with the edge part and protrudes from the cooling plate to the edge part to suppress an expansion of the edge part.

8. The battery system according to claim 6 , wherein the swelling CID is disposed on the edge part.

9. The battery system according to claim 7 , wherein the swelling aperture is formed to penetrate through the swelling suppression part, and the swelling CID is disposed in the swelling aperture.

10. The battery system according to claim 1 , wherein the swelling aperture includes:

an expansion width limiting part formed vertically from an inner side of the cooling plate to an exterior of the cooling plate.

11. The battery system according to claim 1 , wherein the battery part has a wound jelly shape.

12. A battery system including a battery having a cathode, an anode, and an electrolyte and improving operation reliability of a swelling current interrupt device (CID), the battery system, comprising:

a cooling plate that forms an appearance of a battery in which the swelling CID interrupting a current flow is mounted and includes a swelling aperture formed therein,

wherein the swelling aperture induces an expansion of a pouch in which the swelling CID is embedded.

13. The battery system according to claim 12 , wherein the cooling plate includes a swelling suppression part that limits the expansion of the pouch.