Abstract: A battery pack including a battery cell, a plurality of electrode tabs coupled to and extending from terminals of the battery cell, a protect circuit module (PCM) to control charging and discharging of the battery cell, a flexible printed circuit board (FPCB) including a plurality of connection pads coupled to the electrode tabs and electrically coupling the battery cell to the PCM, and a case accommodating the battery cell, the electrode tabs, the PCM, and the FPCB, wherein the case includes a first case accommodating the battery cell and a second case covering the first case, and wherein the first case includes ribs extending toward the second case and has cut-out grooves at regions corresponding to the connection pads.

Abstract: Provided is a secondary battery, which has increased reliability by providing a stable connection structure of a temperature sensitive element. The secondary battery includes an electrode assembly formed by winding a positive electrode plate, a negative electrode plate and a separator and including a pair of lead tabs drawn from the positive electrode plate and the negative electrode plate, a pouch sealing the electrode assembly and including a terrace portion exposing the lead tabs to the outside, a temperature sensitive element formed in the terrace portion and electrically connected to the lead tabs, and a movement preventing tape formed in the terrace portion to cover the temperature sensitive element.

Abstract: In a battery pack according to the embodiment of the present invention, when coupling bosses of a second case are coupled to coupling holes of a first case, the first case and the second case can be easily coupled to each other by reducing the thicknesses of some portions of a rib having the coupling holes before the coupling bosses are coupled to the coupling holes. In addition, the first case and the second case can be smoothly coupled to each other at the initial step of coupling the coupling bosses and the coupling holes to each other by opening the outermost portion of the first case facing the top end of the rib having the coupling holes.

Abstract: A battery pack having a case configured to prevent deformation. The battery pack includes a plurality of bare cells, a circuit module electrically connected to the plurality of bare cells, and a case accommodating the plurality of bare cells and the circuit module. The case includes a first case having one side opened to accommodate the plurality of bare cells and the circuit module and a second case covering the opened one side of the first case. The first case has a first planar part that is a bottom surface on which the plurality of bare cells are mounted, and first case side parts bent from the first planar part and extending toward the second case. The first case has corners formed by connecting neighboring first case side parts. A first rib unit is formed at inside of at least one of the corners.

Abstract: A battery pack including a battery cell, a plurality of electrode tabs coupled to and extending from terminals of the battery cell, a protect circuit module (PCM) to control charging and discharging of the battery cell, a flexible printed circuit board (FPCB) including a plurality of connection pads coupled to the electrode tabs and electrically coupling the battery cell to the PCM, and a case accommodating the battery cell, the electrode tabs, the PCM, and the FPCB, wherein the case includes a first case accommodating the battery cell and a second case covering the first case, and wherein the first case includes ribs extending toward the second case and has cut-out grooves at regions corresponding to the connection pads.

Abstract: A battery pack having a case configured to prevent deformation. The battery pack includes a plurality of bare cells, a circuit module electrically connected to the plurality of bare cells, and a case accommodating the plurality of bare cells and the circuit module. The case includes a first case having one side opened to accommodate the plurality of bare cells and the circuit module and a second case covering the opened one side of the first case. The first case has a first planar part that is a bottom surface on which the plurality of bare cells are mounted, and first case side parts bent from the first planar part and extending toward the second case. The first case has corners formed by connecting neighboring first case side parts. A first rib unit is formed at inside of at least one of the corners.

Abstract: In a battery pack according to the embodiment of the present invention, when coupling bosses of a second case are coupled to coupling holes of a first case, the first case and the second case can be easily coupled to each other by reducing the thicknesses of some portions of a rib having the coupling holes before the coupling bosses are coupled to the coupling holes. In addition, the first case and the second case can be smoothly coupled to each other at the initial step of coupling the coupling bosses and the coupling holes to each other by opening the outermost portion of the first case facing the top end of the rib having the coupling holes.