CN-122001134-A - Jointing structure and jointing method for power line

Abstract

The invention provides a power line jointing structure and jointing method capable of being used as a power line without bending an end part of a stator coil into a crank shape. The joint structure of the present invention comprises a cylindrical stator core, and a stator coil wound around the stator core, wherein the joint structure is a joint structure of a 1 st power line formed at an end of the stator coil and a 2 nd power line connected to an external device, and the end of the 1 st power line and the end of the 2 nd power line extend along a radial direction of the stator core, and are overlapped and joined in an axial direction of the stator core.

Inventors

• TOMITA DAIJIRO

Assignees

• 丰田自动车株式会社

Dates

Publication Date

20260508

Application Date

20251030

Priority Date

20241105

Claims (3)

1. 1. A power line connection structure, comprising: cylindrical stator core A stator coil wound around the stator core, The joint structure is a joint structure of a 1 st power line formed at an end of the stator coil and a2 nd power line connected to an external device, The end portion of the 1 st power line and the end portion of the 2 nd power line extend in the radial direction of the stator core, and overlap and join in the axial direction of the stator core.
2. 2. The power line joining structure according to claim 1, wherein, When viewed in the axial direction of the stator core, a joint portion of the end portion of the 1 st power line and the end portion of the 2 nd power line is formed radially outward of the stator core.
3. 3. A method for joining power lines, comprising: cylindrical stator core A stator coil wound around the stator core, The joining method is a joining method of a1 st power line formed at an end of the stator coil and a2 nd power line connected to an external device, and includes the steps of: disposing the end portions of the 1 st power line and the 2 nd power line to extend in the radial direction of the stator core; overlapping the end of the 1 st power line and the end of the 2 nd power line in the axial direction of the stator core, and The end of the 1 st power line and the end of the 2 nd power line are joined by ultrasonic joining.

Description

Jointing structure and jointing method for power line Technical Field The invention relates to a power line jointing structure and jointing method. Background Patent document 1 discloses that an end portion of a stator coil is bent into a crank shape to serve as a power line, and the power line is joined to wiring of an external power source by welding. Patent document 1 Japanese patent application laid-open No. 2016-131425 Disclosure of Invention However, in patent document 1, in order to use an end portion of a stator coil as a power line, it is necessary to bend it into a crank shape. In order to solve the above problems, the present invention provides a power line joining structure and a power line joining method that can be used as a power line without bending an end portion of a stator coil into a crank shape. A joint structure is provided with a cylindrical stator core, and a stator coil wound around the stator core, wherein the joint structure is a joint structure of a1 st power line formed at an end of the stator coil and a2 nd power line connected to an external device, and the end of the 1 st power line and the end of the 2 nd power line extend in a radial direction of the stator core and overlap and are joined in an axial direction of the stator core. With this structure, the end portion of the stator coil can be used as a power line without bending the end portion into a crank shape. When viewed in the axial direction of the stator core, a joint portion of the end portion of the 1 st power line and the end portion of the 2 nd power line is formed radially outward of the stator core. With this structure, a space for disposing the device necessary for joining the end portion of the 1 st power line and the end portion of the 2 nd power line can be ensured. A joining method for a motor vehicle includes a cylindrical stator core, and a stator coil wound around the stator core, wherein the joining method is a joining method for a1 st power line formed at an end of the stator coil and a 2 nd power line connected to an external device, and includes a step of arranging the end of the 1 st power line and the end of the 2 nd power line to extend in a radial direction of the stator core, a step of overlapping the end of the 1 st power line and the end of the 2 nd power line in an axial direction of the stator core, and a step of joining the end of the 1 st power line and the end of the 2 nd power line by ultrasonic joining. With this structure, the end portion of the stator coil can be used as a power line without bending the end portion into a crank shape. Effects of the invention The present invention can provide a power line joining structure and a power line joining method that can be used as a power line without bending an end portion of a stator coil into a crank shape. Drawings Fig. 1 is a schematic configuration diagram of a stator to which a power line joining structure according to embodiment 1 is applied. Fig. 2 is a view showing a state in which the 1 st power line and the 2 nd power line are ultrasonically bonded. Detailed Description Hereinafter, an embodiment of the present invention will be described with reference to fig. 1 to 2. Fig. 1 is a schematic configuration diagram of a stator to which a power line joining structure according to embodiment 1 is applied. Fig. 2 is a view showing a state in which the 1 st power line and the 2 nd power line are ultrasonically bonded. Of course, the Z-axis coordinates shown in fig. 1 to 2 are for convenience of explanation of the positional relationship of the constituent elements. In fig. 1 to 2, the Z-axis forward direction is vertically upward. Embodiment 1 A stator 20 to which the power line joining structure 10 according to embodiment 1 is applied will be described with reference to fig. 1. The stator 20 is combined with a rotor not shown to constitute a rotary electric machine. The rotating electrical machine is, for example, a rotating electrical machine having a function as a motor (motorr) mounted on a vehicle such as an electric vehicle, a hybrid vehicle, or a fuel cell vehicle, and a function as a generator (generator), and is a so-called motor generator. As shown in fig. 1, the stator 20 includes a stator core 21, a stator coil 22, a1 st power line 31, and a2 nd power line 32. The stator core 21 is formed in a substantially cylindrical shape, and is formed by stacking a plurality of substantially annular electromagnetic steel plates in the axial direction (Z-axis direction in fig. 1). Each of the electromagnetic steel plates constituting the stator core 21 has substantially the same shape, and is formed by punching or the like. The stator core 21 includes an annular yoke extending in the circumferential direction, a plurality of teeth protruding radially inward from an inner peripheral surface of the yoke, and a plurality of slots (all not shown) formed between the teeth. A stator coil 22 is wound around the stator core 21. The stator coil