WO2021147129A1

WO2021147129A1 - Wheel hub motor having built-in charging system

Info

Publication number: WO2021147129A1
Application number: PCT/CN2020/076291
Authority: WO
Inventors: 倪捷; 陈文胜; 张芳勇; 吴启皇; 邵煕芳; 羊淑华; 王松根
Original assignee: 浙江绿源电动车有限公司
Priority date: 2020-01-21
Filing date: 2020-02-22
Publication date: 2021-07-29
Also published as: CN111049326A

Abstract

Disclosed is a wheel hub motor having a built-in charging system, comprising a housing, a motor shaft, etc.; a stator assembly comprises a stator iron core and a stator support which are connected to each other; a winding coil is wound around the stator iron core, and the motor shaft passes through the housing, the stator support and a rotor assembly; the rotor assembly and the housing rotate around the stator assembly by taking the motor shaft as an axis; a motor wire assembly passes through the motor shaft to be connected to the stator assembly; and the wheel hub motor comprises an insulation cooling liquid and a charging system, the insulation cooling liquid being located in the housing, and the charging system being provided on the stator support. In the present invention, the charging system is provided on the stator assembly, and is integrated with the motor in space, saving space. In addition, as the interior of the housing is a sealed space, the charging system is prevented from corrosion of dust and moisture from an external environment. The two heat-generating assemblies, i.e. the charging system and the stator assembly, are provided together for centralized heat dissipation, which is also beneficial to increasing heat dissipation efficiency.

Description

Wheel hub motor with built-in charging system

Technical field

The invention relates to a motor, in particular to a hub motor with a built-in charging system.

Background technique

The current charging systems for electric vehicles on the market are generally installed separately from the motor. The user needs to equip a separate charger to charge the battery of the electric vehicle, which is inconvenient to carry, and the charger is waterproof and waterproof during carrying. Dust protection is also a big problem. On the other hand, the charger also has a heating problem during the working process. At present, most split-type chargers use air-cooled heat dissipation, which has low heat dissipation efficiency and also takes up a large space, so it needs to be improved.

Summary of the invention

Aiming at the defects of inconvenient carrying of electric vehicle chargers and poor heat dissipation effect existing in the prior art, the present invention provides a new in-wheel motor with a built-in charging system.

In order to solve the above technical problems, the present invention is implemented through the following technical solutions:

A hub motor with a built-in charging system includes a casing, a motor shaft, a stator assembly, a rotor assembly, and a motor wire assembly. The stator assembly includes a stator core and a stator support that are connected to each other. The stator core is wound with Winding coils, the housing is a hollow cavity, the stator assembly is located in the housing, the rotor assembly is connected to the housing and sleeved outside the stator assembly, and the motor shaft passes through The housing, the stator support, the rotor assembly, the rotor assembly, and the housing rotate around the stator assembly with the motor shaft as an axis, and the motor wire assembly passes through the motor shaft It is connected with the stator assembly and further includes an insulating cooling liquid and a charging system, the insulating cooling liquid is located in the casing, and the charging system is arranged on the stator support.

The casing provides protection for components such as the stator assembly and the rotor assembly to prevent damage from external forces. The motor wire assembly can be used to provide power to the stator assembly, etc., so that each component can perform its own function. The insulating cooling liquid in the casing is in a flowing state, and flows inside the casing as the casing rotates, and fully contacts with various heating components to exchange heat, which greatly improves the heat dissipation efficiency.

In the present invention, the charging system is arranged on the stator assembly and is spatially integrated with the motor, which saves more space. At the same time, since the inside of the casing belongs to a sealed space, the charging system is prevented from being corroded by dust and water vapor in the external environment. The two heat generating components, the charging system and the stator assembly, are arranged together and then concentrated heat is also helpful to improve the heat dissipation efficiency.

Preferably, the above-mentioned in-wheel motor with a built-in charging system includes a main circuit board, an input end, and an output end, the main circuit board includes a charging circuit module, the input end and the output end Are respectively connected with the main circuit board.

The input terminal is used to connect an external 220V power supply, and the output terminal is connected to the battery of an electric vehicle. The charging circuit module includes a conversion circuit, a rectifier circuit, a sampling feedback circuit, a PWM control circuit, etc., through the charging circuit module to rectify and filter the mains 220V into The DC voltage required by the battery.

Preferably, the above-mentioned in-wheel motor with a built-in charging system further includes an auxiliary power supply circuit module, the auxiliary power supply circuit module is arranged on the stator support and connected to the motor wire assembly, and the auxiliary power supply The circuit module is one of a step-up DC/DC converter, a step-down DC/DC converter, and a buck-boost DC/DC converter.

Generally, the voltage of the battery will decrease as the battery is discharged, and the auxiliary power circuit module can output a constant voltage when the input voltage changes within a certain range to supply power to other electrical appliances on the vehicle.

Preferably, the aforementioned in-wheel motor with a built-in charging system further includes a control circuit module, a signal connection circuit module, and a signal sensor group. The control circuit module, the signal connection circuit module, and the signal sensor group are all Is arranged on the stator assembly, the signal sensor group is connected to the signal connection circuit module, the signal connection circuit module is connected to the control circuit module, and the control circuit module is connected to the motor wire assembly connect.

The signal sensor group includes Hall signal sensors, temperature signal sensors and other components, which can be installed on different parts of the stator assembly according to the properties and functions of different sensors.

The signal connection circuit module can receive the temperature signal, speed signal and other electrical signals monitored and transmitted by the signal sensor group, and then transmit the processed electrical signal to the control circuit module, and the control circuit module issues instructions based on the various signal information received.

Preferably, in the aforementioned in-wheel motor with a built-in charging system, the auxiliary power supply circuit module is integrated into the overall circuit board.

Integrating the auxiliary power circuit module into the main circuit board makes the structure of the present invention more compact and the installation process more convenient.

Preferably, in the aforementioned in-wheel motor with a built-in charging system, the signal connection circuit module is integrated into the overall circuit board, and the signal sensor group is arranged on the stator core.

Integrating the signal connection circuit module into the overall circuit board makes the structure of the present invention more compact and the installation process more convenient.

Preferably, in the above-mentioned in-wheel motor with a built-in charging system, the signal connection circuit module and the signal sensor group are respectively arranged on the stator core.

Setting the signal sensor group directly on the stator core can better monitor information such as temperature and speed, and improve the accuracy of the control system.

Preferably, in the above-mentioned in-wheel motor with a built-in charging system, the control circuit module is arranged in the middle and upper part of the stator support, and the charging system is located in the middle and lower part of the stator support.

When the vehicle is running, the control circuit module located in the upper middle of the stator bracket is in a working and heating state, and the insulating cooling fluid moves together with the shell to quickly transfer the heat of each heating element to the shell and quickly dissipate heat. During static charging, the charging system located in the lower part of the stator bracket is in working condition, and the insulating cooling liquid immerses the heating components of the charging system under the action of gravity to dissipate heat. Separate the control circuit module and the charging system, and use their different working modes to provide different heat dissipation schemes to improve the heat dissipation efficiency.

Preferably, in the above-mentioned in-wheel motor with a built-in charging system, the charging system is located in the middle and lower part of the stator bracket, and the control circuit module is integrated into the overall circuit board.

The control circuit module is integrated into the main circuit board, so that the structure of the present invention is more compact and the installation process is more convenient.

Preferably, the above-mentioned in-wheel motor with a built-in charging system further includes an oil filling plug, a through oil filling hole is provided on the casing, and the oil filling plug is matched with the oil filling hole and seals the oil filling hole.

The setting of the oil filling plug and the oil filling hole can facilitate the replacement and supplement of insulating coolant at any time, which is convenient for later maintenance.

Description of the drawings

Figure 1 is a cross-sectional view of Embodiment 1 of the present invention;

2 is a schematic diagram of the structure of the stator assembly and each circuit module of the present invention in Embodiment 1;

3 is a schematic diagram of the structure of the stator assembly and each circuit module of the present invention in Embodiment 2;

4 is a schematic diagram of the structure of the stator assembly and each circuit module of the present invention in Embodiment 3;

FIG. 5 is a schematic diagram of the structure of the stator assembly and each circuit module in Embodiment 4 of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with accompanying drawings 1-5 and specific implementations, but they are not a limitation of the present invention:

Example 1

A hub motor with a built-in charging system includes a housing 1, a motor shaft 3, a stator assembly 2, a rotor assembly 4, and a motor wire assembly 31. The stator assembly 2 includes a stator core 21 and a stator support 22 connected to each other. The stator core 21 is wound with winding coils, the casing 1 is a hollow cavity, the stator assembly 2 is located in the casing 1, and the rotor assembly 4 is connected to and sleeved with the casing 1 Located outside the stator assembly 2, the motor shaft 3 passes through the casing 1, the stator support 22, the rotor assembly 4, and the rotor assembly 4 and the casing 1 are connected to the motor shaft 3 is the axis that rotates around the stator assembly 2, the motor wire assembly 31 passes through the motor shaft 3 and is connected to the stator assembly 2, and also includes an insulating cooling liquid 13, a charging system 5, the insulating cooling liquid 13 is located in the casing 1, and the charging system 5 is arranged on the stator support 22.

When the vehicle is running, the motor wire assembly 31 is connected to the electric vehicle battery, the winding coil on the stator core 21 is energized, the rotor assembly 4 rotates with the motor shaft 3 as the axis under the action of the magnetic field force, and the housing 1 is in the rotor assembly 4. Driven by, each heating component is in a working and heating state, and the insulating cooling liquid 13 moves together with the casing 1 to quickly transfer the heat of each heating element to the casing 1 to quickly dissipate heat.

During static charging, the charging system 5 is in a working heating state, and the insulating coolant 13 immerses the heating components of the charging system 5 under the action of gravity to dissipate heat.

Preferably, the charging system 5 includes a main circuit board 51, an input terminal 52, and an output terminal 53, the main circuit board 51 includes a charging circuit module 511, and the input terminal 52 and the output terminal 53 are connected to the main circuit board 51, respectively. The circuit board 51 is connected.

Preferably, it further includes an auxiliary power supply circuit module 8. The auxiliary power supply circuit module 8 is arranged on the stator support 22 and is connected to the motor wire assembly 31. The auxiliary power supply circuit module 8 is a step-up DC/ One of DC converters, step-down DC/DC converters, and buck-boost DC/DC converters.

Preferably, it further includes a control circuit module 6, a signal connection circuit module 7, and a signal sensor group 9. The control circuit module 6, the signal connection circuit module 7, and the signal sensor group 9 are all arranged in the stator assembly 2. Above, the signal sensor group 9 is connected to the signal connection circuit module 7, the signal connection circuit module 7 is connected to the control circuit module 6, and the control circuit module 6 is connected to the motor wire assembly 31. connect.

Preferably, the signal connection circuit module 7 and the signal sensor group 9 are respectively arranged on the stator core 21.

Preferably, the control circuit module 6 is arranged in the upper middle part of the stator support 22, and the charging system 5 is positioned in the lower middle part of the stator support 22.

Preferably, an oil filling plug 12 is further included. The casing 1 is provided with a penetrating oil filling hole 11, and the oil filling plug 12 is matched with the oil filling hole 11 and seals the oil filling hole 11.

When the vehicle is running, the motor wire assembly 31 is connected to the electric vehicle battery, the winding coil on the stator core 21 is energized, the rotor assembly 4 rotates with the motor shaft 3 as the axis under the action of the magnetic field force, and the housing 1 is in the rotor assembly 4. The signal connection circuit module 7, the signal sensor group 9, the stator core 21, the control circuit module 6, and the auxiliary power circuit module 8 are in a working and heating state, and the insulating coolant 13 moves together with the shell 1. The heat of each heating element is quickly transferred to the casing 1 to quickly dissipate heat.

Example 2

Preferably, the auxiliary power circuit module 8 is integrated into the overall circuit board 51.

Preferably, the signal connection circuit module 7 is integrated into the overall circuit board 51, and the signal sensor group 9 is arranged on the stator core 21.

During static charging, the charging system 5 is in a working heating state, and the insulating coolant 13 immerses the auxiliary power circuit module 8, the signal connection circuit module 7, and the heating components of the charging system 5 under the action of gravity to dissipate heat.

Example 3

Preferably, the charging system 5 is located in the middle and lower part of the stator bracket 22, and the control circuit module 6 is integrated into the overall circuit board 51.

Preferably, it further includes an oil filling plug 12, the casing 1 is provided with a through oil filling hole 11, and the oil filling plug 12 is matched with the oil filling hole 11 and seals the oil filling hole 11.

During static charging, the charging system 5 is in a working heating state, and the insulating coolant 13 immerses the control circuit module 6 and the heating components of the charging system 5 under the action of gravity to dissipate heat.

Example 4

During static charging, the charging system 5 is in a working heating state, and the insulating coolant 13 immerses the auxiliary power circuit module 8, the signal connection circuit module 7, the control circuit module 6, and the heating components of the charging system 5 under the action of gravity to dissipate heat.

In short, the above descriptions are only preferred embodiments of the present invention, and any equivalent changes and modifications made in accordance with the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

A hub motor with a built-in charging system, comprising a casing (1), a motor shaft (3), a stator assembly (2), a rotor assembly (4), and a motor wire assembly (31). The stator assembly (2) includes a mutual The stator core (21) and the stator support (22) are connected, the stator core (21) is wound with winding coils, the casing (1) is a hollow cavity, and the stator assembly (2) is located In the casing (1), the rotor assembly (4) is connected to the casing (1) and sleeved outside the stator assembly (2), and the motor shaft (3) passes through the The housing (1), the stator support (22), the rotor assembly (4), the rotor assembly (4), and the housing (1) are wound around the motor shaft (3) as the axis The stator assembly (2) rotates, and the motor wire assembly (31) passes through the motor shaft (3) and is connected to the stator assembly (2). In the system (5), the insulating cooling liquid (13) is located in the casing (1), and the charging system (5) is arranged on the stator support (22).
The in-wheel motor with a built-in charging system according to claim 1, characterized in that: the charging system (5) comprises a main circuit board (51), an input end (52), an output end (53), and the main The circuit board (51) includes a charging circuit module (511), and the input end (52) and the output end (53) are respectively connected to the main circuit board (51).
The in-wheel motor with a built-in charging system according to claim 2, characterized in that it further comprises an auxiliary power circuit module (8), and the auxiliary power circuit module (8) is arranged on the stator support (22) and Connected to the motor line assembly (31), the auxiliary power circuit module (8) is a step-up DC/DC converter, a step-down DC/DC converter, and a step-up DC/DC converter Kind of.
The in-wheel motor with a built-in charging system according to claim 3, characterized in that it further comprises a control circuit module (6), a signal connection circuit module (7), a signal sensor group (9), and the control circuit module ( 6). The signal connection circuit module (7) and the signal sensor group (9) are all arranged on the stator assembly (2), and the signal sensor group (9) is connected to the signal connection circuit module (7). ) Phase connection, the signal connection circuit module (7) is connected with the control circuit module (6), and the control circuit module (6) is connected with the motor wire assembly (31).
The in-wheel motor with a built-in charging system according to claim 4, characterized in that the auxiliary power circuit module (8) is integrated into the main circuit board (51).
The in-wheel motor with a built-in charging system according to claim 5, characterized in that: the signal connection circuit module (7) is integrated into the main circuit board (51), and the signal sensor group (9) is arranged On the stator core (21).
The in-wheel motor with a built-in charging system according to claim 4, characterized in that: the signal connection circuit module (7) and the signal sensor group (9) are respectively arranged on the stator core (21) .
The in-wheel motor with a built-in charging system according to any one of claims 4 to 7, characterized in that: the control circuit module (6) is arranged in the middle and upper part of the stator bracket (22), and the charging system (5) Located in the middle and lower part of the stator bracket (22).
The in-wheel motor with a built-in charging system according to any one of claims 4 to 7, characterized in that: the charging system (5) is located in the middle and lower part of the stator bracket (22), and the control circuit module ( 6) Integrated into the overall circuit board (51).
The in-wheel motor with a built-in charging system according to claim 1, characterized in that it further comprises an oil filling plug (12), the casing (1) is provided with a through oil filling hole (11), the oil filling plug (12) Fit the oil injection hole (11) and seal the oil injection hole (11).