A lead-out wire structure and a driving motor having the same

Abstract

The utility model relates to drive motor field, specifically is a kind of outgoing line structure and the drive motor with the outgoing line structure of this, including three-phase outgoing line;The three-phase outgoing line includes wire core;The wire core end portion is equipped with conductive wrapping layer;The outgoing line structure disclosed in the utility model is by setting conductive wrapping layer at wire core end portion;Through the restraint of conductive wrapping layer, the compactness of bare copper wire arrangement of wire core end portion can be guaranteed, the welding of wire core end portion is avoided scattered, to effectively solve the high temperature generated in the welding process due to short-time high current welding of three-phase outgoing line and busbar, three-phase outgoing line bare copper wire fracture, silk scattering and other problems.

Description

Technical Field

[0001] This utility model relates to the field of drive motors, specifically a lead wire structure and a drive motor having the lead wire structure. Background Technology

[0002] Currently, the components and functions of the connection structure between the three-phase leads and the busbar in the flat wire stator of the drive motor of new energy vehicles are basically the same. Its main function is to connect the stator busbar and the three-phase leads, realize the high-voltage connection in long distances and narrow motor layout space, transmit input / output current and voltage, and ensure the stability and durability of the three-phase resistance during motor operation.

[0003] However, the shape and connection method of the connection structure between the three-phase leads and the stator busbar in different drive motor flat wire stators are very different. These differences may lead to significant defects in the performance, service life, manufacturing difficulty and production cost of drive motor flat wire stators.

[0004] The existing solution involves resistance welding multiple strands of bare copper wires of the three-phase leads into a flat square structure, and then brazing it with the busbar copper busbar. Through cross-sectional analysis, the resistance welding process of the multiple strands of bare copper wires of the three-phase leads shows that the density of the welded section is not high, and there are gaps and voids around the perimeter of the section, which affects the stability of the three-phase resistance value.

[0005] In addition, the pressure of the brazing head during the brazing process will damage the flat square structure of the multi-strand bare copper wires of the three-phase leads, causing internal cracks, surface wire breakage, and wire breakage, which will affect the consistency of the three-phase resistance values.

[0006] Ultimately, all of these will cause the motor to generate a lot of heat during operation, leading to a decrease in the motor's output performance, or even the motor's insulation to fail and burn out.

[0007] The existing patent 202322837136.5 - Busbar, Motor including the busbar and Vehicle does not clearly solve the above-mentioned technical problems.

[0008] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing three-phase lead-out lines, busbars, or the connection structure between the two. Utility Model Content

[0009] The purpose of this invention is to provide a lead wire structure that is convenient for connection with a busbar.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0011] A lead wire structure includes three-phase leads; the three-phase leads include conductor cores; the ends of the conductor cores are provided with conductive wrapping layers.

[0012] The conductive wrapping layer includes a sleeve terminal fitted onto the end of the three-phase lead wire.

[0013] The horizontal cross-section of the socket terminal is rectangular.

[0014] The socket terminal is connected to the end of the conductor core of the three-phase lead wire by a ring terminal through a cold pressing process.

[0015] The socket terminal is made of a highly conductive material, which is copper or a copper alloy, or silver or a silver alloy.

[0016] A drive motor includes a stator, on which a busbar is provided; the busbar is connected to the lead wire structure.

[0017] The bus includes a bus body, on which copper bus pins are provided; the side of the copper bus pins is attached to the outer side of the conductive wrapping layer in the lead wire structure.

[0018] The advantages of this utility model are:

[0019] This utility model discloses a lead wire structure and a drive motor having the lead wire structure.

[0020] The lead wire structure disclosed in this utility model provides a conductive wrapping layer at the end of the conductor core. The binding of the conductive wrapping layer ensures the compactness of the bare copper wire arrangement at the end of the conductor core, preventing the conductor core from becoming scattered during welding. This effectively solves the problems of high temperature generated during short-time high-current welding of three-phase lead wires and busbars, resulting in breakage and fraying of the bare copper wires of the three-phase lead wires. Attached Figure Description

[0021] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is the left view of the present invention.

[0024] Figure 3 This is a schematic diagram of the stator assembly of this utility model.

[0025] The markings in the above figures are all:

[0026] 1. Three-phase lead wire, 2. Conductor core, 3. Conductive sheath, 4. Busbar, 41. Copper busbar pins. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0028] A lead wire structure includes a three-phase lead wire 1; the three-phase lead wire 1 includes a conductor core 2; the conductor core 2 has a conductive wrapping layer 3 at its end; the lead wire structure disclosed in this utility model, by setting a conductive wrapping layer 3 at the end of the conductor core 2, can ensure the compactness of the bare copper wire arrangement at the end of the conductor core 2 through the binding of the conductive wrapping layer 3, and avoid the scattering of the conductor core 2 at its end during welding, thereby effectively solving the problems of the three-phase lead wire 1 breaking and scattering due to the high temperature generated by short-time high current welding during the welding process between the three-phase lead wire 1 and the busbar 4.

[0029] The lead wire structure disclosed in this utility model is mainly used to connect with the busbar 4 on the stator to achieve high-voltage connection over long distances and in narrow motor layout spaces, transmit input / output current and voltage, and ensure the stability and durability of the three-phase resistance during motor operation.

[0030] In addition, the lead wire structure disclosed in this utility model mainly includes a three-phase lead wire 1; the three-phase lead wire 1 is the main structure of the lead wire structure. In this utility model, the three-phase lead wire 1 is further divided into U-phase three-phase lead wire 1, V-phase three-phase lead wire 1 and W-phase three-phase lead wire 1 according to the usage requirements.

[0031] In addition, each of the three-phase lead-out lines 1 includes a conductor core 2; the conductor core 2 is made of multiple bare copper wires wound together, and in this invention, the end of the conductor core 2 is provided with a conductive wrapping layer 3; the conductive wrapping layer 3 is an outer wrapping component, mainly to ensure the tightness of the arrangement of each bare copper wire at the end of the conductor core 2; in this invention, the conductive wrapping layer 3 is equivalent to being squeezed at the end of the conductor core 2. Based on this setting, problems such as cracking, loosening, or breaking of the conductor core 2 at the end can be avoided during subsequent connection, thereby effectively solving the problem of unbalanced resistance values ​​of the three-phase lead-out lines 1 of the flat wire stator, ensuring uniform heat generation of the stator and improving the durability and reliability of the stator.

[0032] In this invention, there are many types of conductive wrapping layer 3. Theoretically, any type that can ensure the compactness of the arrangement of each bare copper wire at the end of the conductor core 2 and the stability of its relative position can be used in this invention.

[0033] For example, a copper sheet structure is wrapped around the outer side of conductor core 2.

[0034] Of course, this is for better connection stability and convenience.

[0035] In this utility model, the conductive wrapping layer 3 includes a sleeve terminal that is sleeved on the end of the three-phase lead wire 1; the sleeve terminal has a through hole structure in the middle, and in subsequent use, the end of the conductor core 2 is inserted into the sleeve terminal. Based on this design, the connection and installation between the conductive wrapping layer 3 and the conductor core 2 can be facilitated.

[0036] Furthermore, in this invention, the horizontal cross-section of the socket terminal is rectangular; based on this design, the outer surface of the socket terminal has multiple planes, which facilitates subsequent bonding and installation with the busbar 4.

[0037] In addition, the horizontal cross-section of the socket terminal in this utility model is generally square, because square socket terminals are easy to cold press.

[0038] Furthermore, in this invention, the socket terminal is connected to the end of the conductor core 2 of the three-phase lead 1 by a ring terminal through a cold pressing process; this invention can quickly realize the connection between the socket terminal and the conductor core 2 through cold pressing, which is beneficial to improving the assembly efficiency between the conductor core 2 and the socket terminal.

[0039] Furthermore, in this invention, the socket terminal is made of a highly conductive material, which is copper or a copper alloy, or silver or a silver alloy. Based on the above design, the socket terminal has good conductivity, thus avoiding the influence of the conductivity of the three-phase lead 1 on the setting of the socket terminal.

[0040] A drive motor includes a stator, on which a busbar 4 is provided; the busbar 4 is connected to the lead wire structure; this utility model, through the setting of the conductive wrapping layer 3, can effectively solve the problem that during the welding process between the three-phase lead wire 1 and the busbar 4, the high temperature generated by short-time high current welding causes the bare copper wire of the three-phase lead wire 1 to break and scatter, resulting in an imbalance of the three-phase resistance of the stator, causing uneven heating of the stator, or even burning out the stator and having to replace the entire flat wire motor.

[0041] This invention modifies the end structure of the three-phase lead 1 by connecting a socket terminal to the end of the three-phase lead 1. The tightness of the end of the three-phase lead 1 is ensured by the constraint of the socket terminal.

[0042] Furthermore, in this utility model, the busbar 4 includes a busbar body, on which copper busbar pins 41 are provided; the side of the copper busbar pins 41 is in contact with the outer side of the conductive wrapping layer 3 in the lead wire structure; based on the above design, the contact area between the busbar 4 and the lead wire structure is guaranteed, which effectively ensures the stability of the connection between the three-phase lead wire 1 and the busbar 4.

[0043] Example 1:

[0044] This utility model discloses a lead wire structure, including a three-phase lead wire 1; the three-phase lead wire 1 includes a conductor core 2; the conductor core 2 is provided with a conductive wrapping layer 3 at its end; the conductive wrapping layer 3 includes a sleeve terminal sleeved on the end of the three-phase lead wire 1; the sleeve terminal is a circular terminal connected to the end of the conductor core 2 of the three-phase lead wire 1 by a cold pressing forming process.

[0045] The stator three-phase lead-out line 1 of this utility model is optimized based on the original function. The end of the three-phase lead-out line 1 adopts a hard connection structure in which multiple strands of bare copper wires are cold-pressed into a square shape using copper ring terminals.

[0046] After adding ring terminals to the multi-strand bare copper wire of the three-phase lead wire 1 through cold pressing, the end of the three-phase lead wire 1 can be made more compact. There are no gaps or voids between the four edges of the conductor core 2 and the socket terminal. This effectively solves the problem that the bare copper wire of the three-phase lead wire 1 breaks and scatters due to the high temperature generated by short-time high current welding during the welding process between the three-phase lead wire 1 and the busbar 4. This leads to an imbalance of the three-phase resistance of the stator, uneven stator heating, and even burnout of the stator, which may result in the need to replace the entire flat wire motor.

[0047] This utility model reduces manufacturing risks and after-sales failures such as flat wire stator durability failure by modifying the end structure of the three-phase lead 1 and adding a socket terminal to the end of the three-phase lead 1. It also improves production efficiency and reduces manufacturing costs.

[0048] In subsequent use, the conductive wrapping layer 3 on the three-phase lead 1 is brazed to the copper bus pin 41 on the bus 4.

[0049] Based on the above design, this utility model has the following technical effects:

[0050] The present invention provides a conductive wrapping layer 3 at the end of the conductor core 2. Based on the setting of the conductive wrapping layer 3, the density of each bare copper wire in the conductor core 2 within the conductive wrapping layer 3 can be ensured, so that there are no cracks, loose wires or broken wires on the outside of the conductor core 2. This effectively solves the problem of unbalanced resistance values ​​of the three-phase lead wires 1 of the flat wire stator, ensures uniform heat generation of the stator and improves the durability and reliability of the stator.

[0051] In this utility model, the conductor core 2 of the three-phase lead wire 1 is provided with a conductive wrapping layer 3 at its end; the socket terminal is connected to the end of the conductor core 2 of the three-phase lead wire 1 by a cold pressing process using a circular terminal; through the above production method, the installation and connection between the conductive wrapping layer 3 and the conductor core 2 can be facilitated, thereby ensuring the convenience of connecting the conductor core 2 and the conductive wrapping layer 3.

[0052] Obviously, the specific implementation of this utility model is not limited to the above-mentioned methods. Any non-substantial improvements made using the inventive concept and technical solution of this utility model are within the protection scope of this utility model.

Claims

1. A lead wire structure, characterized in that, Includes three-phase leads; the three-phase leads include conductor cores; the ends of the conductor cores are provided with conductive wrapping layers; The conductive wrapping layer includes a sleeve terminal fitted onto the end of the three-phase lead wire; The socket terminal is made of a highly conductive material; The socket terminal can be connected to the end of the conductor core of the three-phase lead wire through a cold pressing process. The outer surface of the conductive wrapping layer in the lead wire structure is in contact with the copper bus pin in the bus.

2. The lead wire structure according to claim 1, characterized in that, The horizontal cross-section of the socket terminal is rectangular.

3. A lead wire structure according to any one of claims 1-2, characterized in that, The socket terminal is connected to the end of the conductor core of the three-phase lead wire by a ring terminal through a cold pressing process.

4. The lead wire structure according to claim 1, characterized in that, The highly conductive material is copper or a copper alloy, or silver or a silver alloy.

5. A drive motor, characterized in that, It includes a stator, on which a busbar is provided; the busbar is connected to a lead wire structure as described in any one of claims 1-4.

6. A drive motor according to claim 5, characterized in that, The bus includes a bus body, on which copper bus pins are provided; the side of the copper bus pins is attached to the outer side of the conductive wrapping layer in the lead wire structure.

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