A secondary battery may include an electrode assembly formed by alternately stacking an electrode and a separator; a battery case; a plurality of electrode tabs, each of which protrudes from the electrode assembly; a plurality of electrode leads, each of which has one end connected to the electrode tab and the other end protruding outward; a piezoelectric element which is disposed to the outside of a cup portion of the battery case that accommodates the electrode assembly and which, when the battery case expands in volume, receives pressure and supplies electric power to the outside; and a short-circuit inducing part which has a wire shape and both ends respectively positioned on sealing portions of the battery case that seal the electrode leads, wherein, when the electric power is applied from the piezoelectric element, both the ends respectively extend toward the electrode leads and come into contact with the electrode leads.

A battery assembly, connected to a vaporization component and supplying power to the vaporization component, includes: a shell; a battery core accommodated in the shell; a first interface provided on the shell, the first interface being provided for insertion of an external device such that the external device charges the battery core; and an action assembly accommodated in the shell. When the external device is inserted into the first interface, the action assembly shuts off an electrical connection between the vaporization component and the battery assembly.

A battery assembly, connected to a vaporization component and supplying power to the vaporization component, includes: a shell; a battery core accommodated in the shell; a first interface provided on the shell, the first interface being provided for insertion of an external device such that the external device charges the battery core; and an action assembly accommodated in the shell. When the external device is inserted into the first interface, the action assembly shuts off an electrical connection between the vaporization component and the battery assembly.

The present invention relates to a battery pack to which a thin-film label can be easily attached, and a label attaching method thereof. Disclosed in one embodiment is a battery pack comprising: a battery cell having an electrode assembly accommodated in a case; and an external film, which has a label attached to at least one surface of the case and directly attached to the case, a step difference compensation tape attached to the upper surface of the label and positioned on one side of the label, and a protective film attached to the upper surface of the label and extending to the upper part of the step difference compensation tape, wherein the protective film is attached so as to be detachable from the label.

A battery pack includes a housing, and a battery cell or battery cell assembly and a circuit board that are disposed in the housing, and further includes: a first electrical connector connecting one of the positive and negative electrodes of the battery cell or battery cell assembly to the circuit board; a second electrical connector connecting the other one of the positive and negative electrodes of the battery cell or battery cell assembly to the circuit board; and a third electrical connector disposed on the circuit board and adapted to be electrically connected to an external electrical device to supply power from the battery cell to the electrical device through the third electrical connector. The third electrical connector includes a socket terminal in press fit with a pin terminal of the external electrical device. The technical solution involves supplying power from the battery cell to the electrical device.

A battery pack includes a housing, and a battery cell or battery cell assembly and a circuit board that are disposed in the housing, and further includes: a first electrical connector connecting one of the positive and negative electrodes of the battery cell or battery cell assembly to the circuit board; a second electrical connector connecting the other one of the positive and negative electrodes of the battery cell or battery cell assembly to the circuit board; and a third electrical connector disposed on the circuit board and adapted to be electrically connected to an external electrical device to supply power from the battery cell to the electrical device through the third electrical connector. The third electrical connector includes a socket terminal in press fit with a pin terminal of the external electrical device. The technical solution involves supplying power from the battery cell to the electrical device.

A battery pack includes a housing, and a battery cell or battery cell assembly and a circuit board that are disposed in the housing, and further includes: a first electrical connector connecting one of the positive and negative electrodes of the battery cell or battery cell assembly to the circuit board; a second electrical connector connecting the other one of the positive and negative electrodes of the battery cell or battery cell assembly to the circuit board; and a third electrical connector disposed on the circuit board and adapted to be electrically connected to an external electrical device to supply power from the battery cell to the electrical device through the third electrical connector. The third electrical connector includes a socket terminal in press fit with a pin terminal of the external electrical device. The technical solution involves supplying power from the battery cell to the electrical device.

A battery pack includes a housing, and a battery cell or battery cell assembly and a circuit board that are disposed in the housing, and further includes: a first electrical connector connecting one of the positive and negative electrodes of the battery cell or battery cell assembly to the circuit board; a second electrical connector connecting the other one of the positive and negative electrodes of the battery cell or battery cell assembly to the circuit board; and a third electrical connector disposed on the circuit board and adapted to be electrically connected to an external electrical device to supply power from the battery cell to the electrical device through the third electrical connector. The third electrical connector includes a socket terminal in press fit with a pin terminal of the external electrical device. The technical solution involves supplying power from the battery cell to the electrical device.

A battery module includes: an all-solid-state battery having a voltage exceeding 0 V; a semiconductor element; a PTC element; and a circuit board, wherein the all-solid-state battery, the semiconductor element, and the PTC element are solder-bonded to the circuit board, the all-solid-state battery has a positive electrode terminal and a negative electrode terminal, the semiconductor element is electrically connected between the positive electrode terminal and the negative electrode terminal, and the PTC element is connected in series between the positive electrode terminal or the negative electrode terminal and the semiconductor element.

The present invention relates to an electric toothbrush that includes a head part and a handle part having a shape connectable to the head part and supplying a driving voltage to the head part according to a user's control. The head part may include a toothbrush head formed with a plurality of bristle holes where toothbrush bristles are disposed and a first through hole and a second through hole spaced apart from each other, a head body extending from the toothbrush head and having an inner passage connected to the first through hole and the second through hole, a head cover which closes the inner passage of the head body, and a first electrode rod and a second electrode rod inserted through the inner passage of the head body, whose one ends being positioned in the first through hole and the second through hole, respectively, and the other ends being exposed to the outside through the head cover, respectively.

The present invention relates to an electric toothbrush that includes a head part and a handle part having a shape connectable to the head part and supplying a driving voltage to the head part according to a user's control. The head part may include a toothbrush head formed with a plurality of bristle holes where toothbrush bristles are disposed and a first through hole and a second through hole spaced apart from each other, a head body extending from the toothbrush head and having an inner passage connected to the first through hole and the second through hole, a head cover which closes the inner passage of the head body, and a first electrode rod and a second electrode rod inserted through the inner passage of the head body, whose one ends being positioned in the first through hole and the second through hole, respectively, and the other ends being exposed to the outside through the head cover, respectively.

Disclosed are a wound electrode assembly, and a method and manufacturing apparatus for manufacturing the wound electrode assembly. The wound electrode assembly includes an electrode sheet. The electrode sheet includes a winding ending section, the winding ending section is provided with a plurality of first tabs, the plurality of first tabs are laminated, and among the two adjacent first tabs, a width of the first tab close to a winding center of the wound electrode assembly is greater than a width of the first tab away from the winding center. Among the two adjacent first tabs, a width of the first tab close to the winding center is greater than a width of the first tab away from the winding center. After the winding ending section is wound, the amount of misalignment between the two adjacent first tabs is reduced.