An electrochemical device includes a cathode, an anode, a separator and a binding layer. The separator is disposed between the cathode and the anode, and at least one binding layer is included between the cathode and the anode. The binding layer includes a high molecular polymer. A dielectric constant of the high molecular polymer is 5 F/m to 50 F/m. By optimizing the dielectric constant of the high molecular polymer in the binding layer of the electrochemical device, a binding force of the binding layer can be effectively increased, deformation of the anode or the cathode due to volume swelling during charge and discharge cycles is reduced, and peeling from the separator is avoided.

An all solid battery includes a cell stack including a negative electrode, a solid electrolyte layer, and a positive electrode, a case to accommodate the cell stack, and a buffer material to pressure the cell stack in the case.

A battery cell may include a jellyroll including a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode. The jellyroll may be disposed inside a case with a safety layer interposed between the jellyroll and the case. The safety layer may be configured to prevent contact between the jellyroll and the case. Moreover, the safety layer is configured to stretch to accommodate one or more deformations in the case such that the safety layer remains interposed between the jellyroll and the case when the case is bent towards the jellyroll. In doing so, the safety layer may prevent the battery cell from developing an internal short, which may occur if the case makes direct contact with the jellyroll.

The disclosed technology relates to a battery utilizing a dampening layer to prevent a failure of the battery. The battery includes an enclosure, a set of electrodes enclosed within the enclosure, and a dampening layer disposed within the set of electrodes. The dampening layer partitions the set of electrodes into a first subset of electrodes and a second subset of electrodes. The dampening layer is configured to absorb a mechanical impact on the enclosure to prevent a failure of at least one of the first subset of electrodes and the second subset of electrodes. The dampening layer may be formed at least one of a polymer, metal, and ceramic.

An embodiment of the present invention provides a secondary battery capable of concurrently securing a vibration characteristic and an insulation function of an electrode assembly by using one finishing tape.

To this end, a secondary battery according to an embodiment of the present invention may comprise: an electrode assembly including a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate; a can for receiving the electrode assembly; a cap assembly for sealing the can; a first current collection plate provided above the electrode assembly and electrically connected to the first electrode plate and the cap assembly, respectively; a second current collection plate provided under the electrode assembly and electrically connected to the second electrode plate and the can, respectively; and a finishing tape having a first region which has an adhesive layer formed thereat to surround the circumferential surface of the electrode assembly, and a second region which can surround a space beyond the upper end of the electrode assembly.

A battery of the present disclosure includes: a battery element, the battery element including a first electrode, a solid electrolyte layer, and a second electrode; a first insulating member; a second insulating member; and a void. The battery element has a laminated structure in which the first electrode, the solid electrolyte layer, and the second electrode are disposed in this order. The first insulating member coats at least a portion of a side surface of the battery element, the second insulating member encloses the battery element, the first insulating member, and the void, and the void includes a void positioned close to the side surface of the battery element.

A battery of the present disclosure includes: a battery element, the battery element including a first electrode, a solid electrolyte layer, and a second electrode; a first insulating member; a second insulating member; and a void. The battery element has a laminated structure in which the first electrode, the solid electrolyte layer, and the second electrode are disposed in this order. The first insulating member coats at least a portion of a side surface of the battery element, the second insulating member encloses the battery element, the first insulating member, and the void, and the void includes a void positioned close to the side surface of the battery element.

According to one embodiment, there is provided a battery. The battery includes a metallic outer can, a wound electrode group, a positive electrode-lead, a negative electrode-lead, a positive electrode insulating cover, and a negative electrode insulating cover.

A battery structure is disclosed. The battery structure includes a first current collector layer, a first active material layer, a spacer layer, a first plastic frame, a second active material layer and a second current collector layer. The first active material layer is disposed on the first current collector layer. The spacer layer is disposed on the first active material and completely covers the top surface of the first active material layer. The first plastic frame is disposed on the side wall of the spacer layer and the top of the first plastic frame has a protruding part which extends to the top surface of the spacer. The second active material layer is disposed on the spacer layer and the protruding part. The second active material is isolated from the first active material via the space layer and the protruding part. The second current collector layer is disposed on the second active material layer.

A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly; a casing which accommodates the electrode assembly and has an opening; a cap assembly which is coupled through the opening and seals the casing; a spacer which is positioned between the electrode assembly and the casing and has multiple holes; and a vent member which is formed on a bottom surface of the casing which is positioned opposite to the opening.