Abstract: This disclosure relates to a method of preparing a lithium compound that includes preparing a lithium phosphate, mixing the lithium phosphate with sulfuric acid to obtain a mixture, converting the lithium phosphate into lithium sulfate through a reaction in the mixture, and separating the lithium sulfate in a solid phase, wherein in the step of converting the lithium phosphate into lithium sulfate through the reaction in the mixture, a sum concentration ([P+S] mol/L) of phosphorus (P) and sulfur (S) in a liquid phase of the mixture is greater than or equal to 5 mol/L.

Abstract: The present disclosure relates to an insulation film capable of being used in a flexible flat cable(FFC) and having excellent flexibility and mechanical properties, and a flexible flat cable (FFC) using the insulation film. The insulation film provided in the present disclosure has very excellent mechanical properties such as tensile strength, elongation and flexibility, and also has very excellent heat-resisting properties such as contractibility and degeneration caused by heat. In addition, by using the insulation film, the flexible flat cable provided in the present disclosure also has very excellent mechanical properties and heat-resisting properties.

Abstract: The present invention relates to a method for manufacturing lithium hydroxide and lithium carbonate, and a device therefor.

Abstract: The present invention relates to a method for producing lithium hydroxide and lithium carbonate, wherein the lithium hydroxide and the lithium carbonate can be produced by a series of steps of: performing bipolar electrodialysis of a lithium-containing solution from which divalent ion impurities have been removed; concentrating lithium in the lithium-containing solution and at the same time, converting the lithium to lithium hydroxide; and carbonating the lithium hydroxide to obtain lithium carbonate.

Abstract: The present disclosure relates to an insulation film capable of being used in a flexible flat cable(FFC) and having excellent flexibility and mechanical properties, and a flexible flat cable (FFC) using the insulation film. The insulation film provided in the present disclosure has very excellent mechanical properties such as tensile strength, elongation and flexibility, and also has very excellent heat-resisting properties such as contractibility and degeneration caused by heat. In addition, by using the insulation film, the flexible flat cable provided in the present disclosure also has very excellent mechanical properties and heat-resisting properties.

Abstract: The present disclosure relates to a method and an apparatus for controlling an engine of a wheel loader, and the apparatus includes: a sensor unit, configured to sense vehicle information and working machine information; a vehicle control unit configured to select a working condition according to a priority of the vehicle information and the working machine information, select an engine mode corresponding to the selected working condition, and output an engine mode signal representing the selected engine mode; and an engine control unit configured to control the engine output according to the engine mode signal output from the vehicle control unit. Accordingly, the present disclosure provides the method and the apparatus for controlling an engine according to a working condition of a wheel loader, thereby smoothly maintaining performance of equipment without requiring a separate manipulation by a worker, and thus achieving an effect of improving fuel efficiency.

Abstract: An exemplary embodiment suggested in the present disclosure relates to an apparatus and a method of controlling a work machine of a work vehicle. The apparatus for controlling a work machine of a work vehicle suggested in the present disclosure measures a speed of a work vehicle, converts an input signal of a joystick into an output current for controlling a proportional valve (P/V) for operating a work machine (for example, a boom and a bucket), compares the speed of the work vehicle with a reference speed, and advances or delays an end time point or an operation time point of the work machine, thereby controlling an impact applied to the work vehicle.

Abstract: An exemplary embodiment suggested in the present disclosure relates to an apparatus and a method of controlling a work machine of a work vehicle. The apparatus for controlling a work machine of a work vehicle suggested in the present disclosure measures a speed of a work vehicle, converts an input signal of a joystick into an output current for controlling a proportional valve (P/V) for operating a work machine (for example, a boom and a bucket), compares the speed of the work vehicle with a reference speed, and advances or delays an end time point or an operation time point of the work machine, thereby controlling an impact applied to the work vehicle.

Abstract: The present disclosure relates to a method and an apparatus for controlling an engine of a wheel loader, and the apparatus includes: a sensor unit, and configured to sense vehicle information and working machine information; a vehicle control unit configured to select a working condition according to a priority of the vehicle information and the working machine information, select an engine mode corresponding to the selected working condition, and output an engine mode signal representing the selected engine mode; and an engine control unit configured to control the engine output according to the engine mode signal output from the vehicle control unit. Accordingly, the present disclosure provides the method and the apparatus for controlling an engine according to a working condition of a wheel loader, thereby smoothly maintaining performance of equipment without requiring a separate manipulation by a worker, and thus achieving an effect of improving fuel efficiency.

Abstract: Disclosed is a position control apparatus for a working machine of a construction machinery, including: a boom driving unit for driving a boom; a bucket driving unit for driving a bucket; a working tool manipulating part for generating a manipulation signal for driving the boom driving unit and the bucket driving unit; a kick-down switch for generating a kick-down signal for lowering a gear stage; and a controller for, if the kick-down signal is generated by the kick-down switch and the manipulation signal is generated by the working tool manipulating part, outputting a control signal to the boom driving unit and the bucket driving unit to move the boom and the bucket to a preset position.

Abstract: The present disclosure discloses a low idle control system of construction equipment and an automatic control method thereof. The low idle control system of construction equipment includes: a front angle change sensing means which detects an operation of at least a part of a front unit through changes in an angle; a controller which is electrically connected to the front angle change sensing means, determines whether to enter an auto idle state by receiving an output signal that is transmitted from the front angle change sensing means, and generates an rpm control signal corresponding to the result of the determination on whether to enter the auto idle state; and an ECU which controls the rpm of an engine by receiving the rpm control signal outputted from the controller. The present disclosure is capable of implementing an effective auto idle function by more accurately recognizing a state of using equipment.

Abstract: Disclosed is a position control apparatus for a working machine of a construction machinery, including: a boom driving unit for driving a boom; a bucket driving unit for driving a bucket; a working tool manipulating part for generating a manipulation signal for driving the boom driving unit and the bucket driving unit; a kick-down switch for generating a kick-down signal for lowering a gear stage; and a controller for, if the kick-down signal is generated by the kick-down switch and the manipulation signal is generated by the working tool manipulating part, outputting a control signal to the boom driving unit and the bucket driving unit to move the boom and the bucket to a preset position.