Abstract: A diagnostic kit tray is provided, which includes a tray body including a plurality of receiving recesses for storing diagnostic kits, and a tray cover coupled to an upper portion of the tray body to prevent foreign substances from penetrating into the receiving recesses, in which the tray body includes a lower plate including a plurality of recesses spaced apart from each other, and a locking member positioned at an edge of the lower plate and including a protrusion and a locking jaw to couple with the tray cover, and the tray cover includes a cover plate including a plurality of seating recesses to receive a portion of the diagnostic kit such that the diagnostic kit can be temporarily stored during use, and a coupling portion including a coupling recess to be coupled to the locking member.

Abstract: A crystalline precursor compound is described for manufacturing a lithium transition metal based oxide powder usable as an active positive electrode material in lithium-ion batteries, the precursor having a general formula Li1?a ((Niz(Ni1/2 Mn1/2)y Cox)1?k Ak)1+a O2, wherein x+y+z=1, 0.1?x?0.4, 0.25?z?0.55, A is a dopant, 0?k?0.1, and 0.04?a?0.50, wherein the precursor has a crystalline size L expressed in nm, with 77?(67*z)?L?97?(67*z). Also a method is described for manufacturing a positive electrode material having a general formula Li1?a? ((Niz (Ni1/2 Mn1/2)y Cox)1?k Ak)1?a? O2, wherein x+y+z=1, 0.1?x?0.4, 0.25?z?0.55, A is a dopant, 0?k?0.1, and 0.01?a??0.10 by sintering the crystalline precursor compound in an oxidizing atmosphere at a temperature T between 800 and 1000° C., for a time t between 6 and 36 hrs.

Abstract: A crystalline precursor compound is described for manufacturing a lithium transition metal based oxide powder usable as an active positive electrode material in lithium-ion batteries, the precursor having a general formula Li1?a ((Niz(Ni1/2 Mn1/2)y Cox)1?k Ak)1+a O2, wherein x+y+z=1, 0.1?x?0.4, 0.25?z?0.55, A is a dopant, 0?k?0.1, and 0.04?a?0.50, wherein the pre cursor has a crystalline size L expressed in nm, with 77?(67*z)?L?97?(67*z). Also a method is described for manufacturing a positive electrode material having a general formula Li1?a? ((Niz (Ni1/2 Mn1/2)y Ak)1?a? O2, wherein x+y+z=1, 0.1?x?0.4, 0.25?z?0.55, A is a dopant, 0?k?0.1, and 0.01?a??0.10 by sintering the crystalline precursor compound in an oxidizing atmosphere at a temperature T between 800 and 1000° C., for a time t between 6 and 36 hrs.

Abstract: Disclosed is a method for controlling a voltage of a DC link for an electric vehicle, which can reduce a capacitance of the DC link interposed between an inverter and a DC/DC converter. The method for controlling the voltage of the DC link in a power system of a vehicle including a battery, a DC/DC converter, the DC link, an inverter, a motor, and a control part controlling the DC/DC converter and the inverter includes the steps of installing a compensator in a control loop of the control part such that a DC link current of the DC/DC converter follows a DC link current of the inverter, calculating a predetermined compensation term based on information of the motor inputted into the compensator, and applying the compensation term to a voltage node in the control loop of the control part in the compensator.

Abstract: A heater unit is provided, the heater unit equipped with an induction heating coil and an electric heater selectively operated based on kind and state of a load of a cooking vessel placed on the heater unit. The kind is determined by an input current inputted when a load-type determination unit causes the induction heating coil to be operated and a resonance current flowing into the induction heating coil. The state is determined by a temperature change of the heater unit when a load-state determination unit allows the electric heater to generate heat, and the induction heating coil and the electric heater are selectively operated based on the determined kind and state of the load. Accordingly, a user needs not to scrupulously determine the kind of the cooking vessel and the electric cooker is not operated under a no-load state to prevent occurrence of safety accidents.