Abstract: An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially disposed on an optical axis from an object side toward an image side. A distance from an object-side surface of the first lens to an imaging plane of an image sensor is TTL, an overall focal length of an optical system including the first to sixth lenses is F, and TTL/F?0.83. An optical axis distance between the second lens and the third lens is D23, an optical axis distance between the third lens and the fourth lens is D34, and 2.2<D23/D34<5.4.

Abstract: A multi path cooling system is provided that includes a first cooling path in which a refrigerant is circulated by a first pump and a second cooling path in which the refrigerant is circulated by a second pump. A reservoir tank is provided through which the refrigerant circulating through the first cooling path enters or exits. An air separator is disposed on the second cooling path to separate air from the passing refrigerant when the refrigerant circulating through the second cooling path passes. The reservoir tank and the air separator communicate with each other.

Abstract: A multi-path cooling system is provided that includes a first cooling path in which a refrigerant is circulated by a first pump and a second cooling path in which the refrigerant is circulated by a second pump. A reservoir tank is provided through which the refrigerant circulating through the first cooling path enters or exits. An air separator is disposed on the second cooling path to separate air from the passing refrigerant when the refrigerant circulating through the second cooling path passes. The reservoir tank and the air separator communicate with each other.

Abstract: A high voltage battery unit for a vehicle and an underbody of the vehicle are provided. The high voltage battery unit mounted to the vehicle is installed under a center floor of the vehicle at the outdoor side. A drive shaft forming a drive device of the vehicle is installed to penetrate between battery built-in parts positioned at both sides with respect to a center tunnel to deliver the power of a powertrain mounted at the front of the vehicle to a rear wheel through the drive shaft.

Abstract: A body of a vehicle equipped with a high-voltage battery is disclosed. The vehicle body includes a rear cross member mounted below the rear side of the front seat so as to be oriented in the lateral direction of the vehicle body, a front cross member mounted in front of the rear cross member so as to be oriented in the lateral direction of the vehicle body, a high-voltage battery mounted between the front cross member and the rear cross member, and a plurality of longitudinal support members mounted to support the bottom of the high-voltage battery and to connect the front cross member and the rear cross member to each other in the longitudinal direction of the vehicle body.

Abstract: Disclosed herein is a battery storage device for an electric vehicle, in which a battery casing is provided under a vehicle floor to secure an indoor space, and a battery module is cooled using indoor air, thus simplifying a cooling structure and reducing a manufacturing cost.

Abstract: A multi-path cooling system is provided that includes a first cooling path in which a refrigerant is circulated by a first pump and a second cooling path in which the refrigerant is circulated by a second pump. A reservoir tank is provided through which the refrigerant circulating through the first cooling path enters or exits. An air separator is disposed on the second cooling path to separate air from the passing refrigerant when the refrigerant circulating through the second cooling path passes. The reservoir tank and the air separator communicate with each other.

Abstract: A body of a vehicle equipped with a high-voltage battery is disclosed. The vehicle body includes a rear cross member mounted below the rear side of the front seat so as to be oriented in the lateral direction of the vehicle body, a front cross member mounted in front of the rear cross member so as to be oriented in the lateral direction of the vehicle body, a high-voltage battery mounted between the front cross member and the rear cross member, and a plurality of longitudinal support members mounted to support the bottom of the high-voltage battery and to connect the front cross member and the rear cross member to each other in the longitudinal direction of the vehicle body.

Abstract: A high voltage battery unit for a vehicle and an underbody of the vehicle are provided. The high voltage battery unit mounted to the vehicle is installed under a center floor of the vehicle at the outdoor side. A drive shaft forming a drive device of the vehicle is installed to penetrate between battery built-in parts positioned at both sides with respect to a center tunnel to deliver the power of a powertrain mounted at the front of the vehicle to a rear wheel through the drive shaft.

Abstract: A thermal management system module for a fuel cell vehicle includes its component parts mounted on a single mounting frame, thus increasing space usage and layout efficiency, reducing overall weight and manufacturing costs and improving piping and wiring efficiency and assembling efficiency of the thermal management system.