Abstract: Discussed is a welding inspection apparatus for battery modules capable of applying an alternating current to a bank constituted by two or more battery cells connected in parallel and a battery module constituted by one or more banks connected in series to calculate an impedance and a resistance value of each of the one or more banks, and a method of inspecting welding of the battery module using the welding inspection apparatus.

Abstract: A battery cell stack includes a plurality of battery cells, a temperature adjuster configured to prevent an increase in temperature of the battery cell stack due to a high external temperature, a heat plate disposed at a lower surface and a side surface of the battery cell stack, a pack case configured to receive the battery cell stack, the temperature adjuster, and the heat plate therein, and a cooling fan configured to discharge heat in the pack case to the outside. The battery cell stack is configured such that, when external power is supplied to an electrical apparatus connected to the battery pack, the battery cell stack does not supply current to the electrical apparatus, and when no external power is supplied to the electrical apparatus, the battery cell stack supplies current to the electrical apparatus.

Abstract: A battery module according to the present invention includes a plurality of battery cells, a module case including an upper frame above the plurality of battery cells and having a plurality of flow holes, a lower frame below the upper frame and including an accommodating space for accommodating at least a portion of each of the plurality of battery cells, and an upper cover between the upper frame and the lower frame, above the plurality of battery cells, and including a plurality of openings to expose electrode terminals of the plurality of battery cells, a piezoelectric sensor film between the upper frame and the upper cover or outside the upper frame, and configured to generate an electrical signal when pressure is applied by an external force, and a control unit configured to receive the electrical signal generated from the piezoelectric sensor film and analyze whether the battery cells have exploded.

Abstract: A battery module includes a plurality of battery cell assemblies. Each of battery cell assemblies includes two or more cylindrical battery cells connected to each other in parallel, and the plurality of battery cell assemblies are connected to each other in series. Each battery cell assembly having the parallel connection structure is configured such that negative electrodes of the two or more cylindrical battery cells are electrically connected to each other via a rail type socket. The series connection between the battery cell assemblies includes an electrical connection between the rail type socket and positive electrodes of battery cells of an adjacent battery cell assembly via connection members.

Abstract: The present disclosure relates to a structure and a method for filling a via hole formed in a multilayer printed circuit board, and more particularly, to a structure and a method for filling a via hole formed in a multilayer printed circuit board, the structure and method enabling high-current transmission even in a narrow space in such a way that a via hole formed when a typical multilayer printed circuit board is manufactured is first filled with Cu and Ag plating, and the remaining vacant space is completely filled with a solder cream, thereby increasing the amount of conductors.

Abstract: The present disclosure relates to a structure and a method for filling a via hole formed in a multilayer printed circuit board, and more particularly, to a structure and a method for filling a via hole formed in a multilayer printed circuit board, the structure and method enabling high-current transmission even in a narrow space in such a way that a via hole formed when a typical multilayer printed circuit board is manufactured is first filled with Cu and Ag plating, and the remaining vacant space is completely filled with a solder cream, thereby increasing the amount of conductors.

Abstract: A dishwashing method of a dishwasher which includes a body, a dishwashing tub contained in the body, a steam generator received in the dishwashing tub to generate steam, a plurality of steam injection nozzles to inject the steam generated by the steam generator, a plurality of control valves to control flow of the steam into the respective steam injection nozzles, the method including injecting steam from a plurality of the steam injection nozzles comprising opening a plurality of the control valves, to maintain an injection pressure of the steam generated by the steam generator.

Abstract: A performance testing apparatus includes a refrigerant pipe provided with open ends, and installed such that a condenser, an expansion device and an evaporator are sequentially aligned from one end thereof to the other end thereof. A refrigerant heating unit is installed at one end of the refrigerant pipe for heating a refrigerant by a double boiler method and transmitting the heated refrigerant to the other end of the refrigerant pipe. Cooling fluids are respectively provided outside of the condenser and the evaporator for exchanging heat with the refrigerants in the condenser and the evaporator. A flow rate measurement unit is used for measuring the flow rate of the refrigerant flowing within the refrigerant pipe. A temperature and pressure measurement unit measure variations in temperature and pressure of the refrigerant passing through the condenser, the expansion device and the evaporator.

Abstract: A steam/water mixed dishwasher using steam and water together, and, more particularly, a dishwasher and dishwashing method of achieving improvement in washing performance and efficiency via direct steam injection to dishes. The dishwasher includes a body containing a dishwashing tub, at least one dish basket disposed in the dishwashing tub and adapted to receive dishes therein, a steam generator to generate steam by heating wash water, and steam injection nozzles to inject the steam generated from the steam generator. The steam injection nozzles are disposed at the same height as a lower surface of the dish basket. The dishwashing method includes injecting steam from a number of the plurality of steam injection nozzles by opening a number of the plurality of control valves, to thereby maintain an injection pressure of the steam generated from the steam generator.