Abstract: Provided is a secondary battery which includes an electrode assembly having an electrode tab extended from an electrode current collector, wherein the electrode tab is provided with an insulation coating layer containing an inorganic filler and a binder, the binder has an electrolyte uptake more than 0% and less than 50%, and the electrolyte uptake is determined by a predetermined method. In the secondary battery according to the present disclosure, the insulation coating layer provided in the electrode tab includes a binder having a low electrolyte uptake, and thus the insulation coating layer has improved adhesion and is prevented from detachment from the electrode tab. As a result, it is possible to maintain an excellent insulation state and to minimize an internal short-circuit in a secondary battery, thereby ensuring safety.

Abstract: A compact safety ignition device for a dual pulse motor capable of preventing accidental ignition of an ignition device includes a housing which forms an accommodation space and coupled to a front port of a combustion tube. Primary and secondary circuit portions mounted inside the housing for generating ignition signals for a primary and secondary propellant, respectively. A primary ignition device mounted at one end of the housing and electrically connected to the primary circuit portion and accommodated in the combustion tube. A secondary bulkhead initiator mounted inside the housing and electrically connected to the secondary circuit portion. The primary ignition device includes a primary detonation portion electrically connected to the primary ignition device and includes a primary bulkhead initiator electrically connected to the primary detonation portion at a protrusion protruding from an end of the primary detonation portion.

Abstract: Provided is a safety ignition device applied to a dual pulse motor, and by installing the safety ignition device in front of a combustion tube, accidental ignition of an ignition device or a propulsion engine may be prevented and reliability of ignition may increase, while space is efficiently used.