Abstract: A thermal management system, a vehicle, and a thermal management method. The thermal management system includes a tank assembly and a valve unit, the tank assembly includes a shell body and a cover plate, the shell body covers the cover plate and forms an accommodation chamber together with the cover plate, and the valve unit is installed on the shell body; the accommodation chamber is internally provided with a plurality of pipelines for liquid circulation, the shell body has a plurality of connection ports communicating with the accommodation chamber, a first end of the pipeline is correspondingly in communication with the connection port, and a second end of the pipeline and a portion of the pipeline are located outside of the accommodation chamber; and the valve unit has a plurality of valve ports correspondingly in communication with the connection ports.

Abstract: A multi-way valve, related to the technical field of control valves, is used to solve the problem of large occupied space, complicated control, and high cost, because of the use of two driving devices for controlling a three-way proportional valve and a two-way proportional valve, where a driving device is connected to a first valve core in a transmission way, and the first valve core is provided with a first matching structure, and a second valve core is provided with a second matching structure that matches the first matching structure. In the first matching state, the first valve core rotates alone and the second valve core remains stationary; in the second matching state, the first valve core rotates to drive the second valve core to rotate synchronously.

Abstract: The present application provides an electric vehicle and a thermal manager thereof. The thermal manager includes a housing, and a plurality of heat transfer tube sets are accommodated in the housing, and each heat transfer tube set is used for connecting a device; a valve assembly is arranged on a front surface of the housing, and the valve assembly is provided with a plurality of valve ports; each valve port is opposite to and communicates with a second end of at least one heat transfer branch tube in a front-and-rear direction, and the two heat transfer branch tubes in a same set are each in communication with a different valve port; the valve assembly is used to selectively communicate with a different valve port when the thermal manager performs mode switching. The electric vehicle includes a motor, a battery, a radiator and the thermal manager as above.

Abstract: An expansion tank for a vehicle cooling system and a vehicle cooling system. The expansion tank includes a tank body and a chamber provided inside the tank body, a liquid inlet and a liquid outlet are provided on the tank body, a diversion channel matched with a bottom of the tank body is provided inside the tank body, both ends of the diversion channel are respectively connected with the liquid inlet and the liquid outlet, a vent hole and a liquid refill hole are sequentially provided on a side of the diversion channel in a flow direction of a coolant liquid, and the vent hole and the liquid refill hole are both communicated with the chamber.

Abstract: A multi-way valve includes a valve seat and a valve core. The valve core is rotatably disposed in the valve seat, the valve seat is provided with a plurality of valve port groups, each valve port group includes a plurality of valve ports, the valve core is provided with communication structure groups corresponding to the valve port groups, respectively, and each of the communication structure groups further includes a plurality of communication structures arranged along a circumferential direction of the valve core. When the valve core is rotated to different rotation positions, valve ports in different valve port groups form different communication states. Only one valve core is required to make a two-way proportional valves, three-way proportional valve, and a four-way proportional valve achieve different communication states, with simple control, compact structure and low cost.

Abstract: A polygonal cutting blade having a circular arc-shaped groove in a hole includes a blade body composed of an upper surface, a lower surface and a plurality of main side surfaces connecting the upper surface and the lower surface. The blade body has a central hole penetrating through the upper surface and the lower surface, and is centrally symmetrical about a central axis of the central hole. At least one set of positioning side surface comprised of adjacent two of the main side surfaces is provided. An inner surface of the central hole has at least one circular arc-shaped groove fitting with a fastening screw for fixing the cutting blade. The circular arc-shaped groove directly faces toward an intersection of the two main side surfaces of the set of positioning side surface. A groove central axis of the circular arc-shaped groove has an offset distance from the central axis.

Abstract: An indexable drilling tool, includes a cutter body, an outer blade and an inner blade. The inner blade is surrounded by a first upper surface, a first lower surface and a first side surface. The first upper surface intersects with the first side surface to form multiple identical inner cutting edges. When drilling, a cutting area of the inner cutting edge as a main cutting edge is located between a central inner point and a central outer point on the inner cutting edge. In a feed direction, an inner convex cutting portion with a maximum cutting depth is arranged between the central inner point and the central outer point. Distances between the central inner point and the inner convex cutting portion and between the central outer point and the inner convex cutting portion in an axial direction are H1 and H2 respectively, which meets the following requirement: 0.9H2?H1?1.1H2.

Abstract: A polygonal cutting blade having a circular arc-shaped groove in a hole includes a blade body composed of an upper surface, a lower surface and a plurality of main side surfaces connecting the upper surface and the lower surface. The blade body has a central hole penetrating through the upper surface and the lower surface, and is centrally symmetrical about a central axis of the central hole. At least one set of positioning side surface comprised of adjacent two of the main side surfaces is provided. An inner surface of the central hole has at least one circular arc-shaped groove fitting with a fastening screw for fixing the cutting blade. The circular arc-shaped groove directly faces toward an intersection of the two main side surfaces of the set of positioning side surface. A groove central axis of the circular arc-shaped groove has an offset distance from the central axis.