KR102068178B1 - Electric Vehicle - Google Patents

Abstract

The present invention is a battery; A motor driven by a battery, the motor comprising: a motor case having an upper space formed at an upper portion thereof and a coolant flow path formed at a lower side of the upper space to cool the stator accommodation space and the stator accommodation space; A cooling plate disposed in the upper space; An inverter mounted on a cooling plate; A stator disposed in the stator accommodation space and having a hollow shape and having a coil; A rotor having a magnet rotated by a stator; It includes a coolant inlet hose for guiding the coolant to the upper space, and the motor case has a coolant hole for guiding the coolant in the upper space to the coolant flow path. There is an advantage in that the assembly and the assembly is improved, and the coolant is simple structure and the inverter and the stator can be sequentially cooled.

Description

Electric Vehicle

The present invention relates to an electric vehicle having a motor, and more particularly to an electric vehicle in which the inside of the motor can be cooled.

In general, automobiles can be divided into a chassis that is organically connected to a body and various devices that form a large appearance.

The chassis includes a driving source such as an engine that drives driving, and main devices such as a power transmission device, a steering device, a suspension device, and a braking device.

An internal combustion engine is mainly used as a driving source installed in an automobile, and an internal combustion engine, which mainly uses volatile fuels, is generated when the fuel is compressed and mixed in a state where the fuel is perfectly mixed with oxygen in the air. Use kinetic energy directly from heat energy. Since internal combustion engines using such volatile fuels cause environmental pollution and exhaustion of petroleum resources due to exhaust gas, electric vehicles powered by electricity have been attracting attention as an alternative.

An electric vehicle is an automobile that uses an electric battery and an electric motor without using petroleum fuel and an engine. It is a pollution-free vehicle without exhaust gas, and drives an automobile by rotating the motor with electricity accumulated in the battery.

It is an object of the present invention to provide an electric vehicle in which an upper space in which an inverter is accommodated and a coolant flow path through which a coolant passes are formed together in one case.

An electric vehicle according to the present invention for solving the above problems is a battery; A motor case driven by the battery, the motor comprising: a motor case having an upper space formed thereon and a coolant flow path configured to cool the stator accommodation space and the stator accommodation space below the upper space; A cooling plate disposed in the upper space; An inverter mounted on the cooling plate; A stator disposed in the stator accommodation space and having a hollow shape and a coil; A rotor having a magnet rotated by the stator; And a coolant inlet hose for guiding the coolant to the upper space, wherein the motor case has a coolant hole for guiding the coolant of the upper space to the coolant flow path.

The coolant holes may be formed in a plurality of spaced apart partitions between the upper space and the coolant flow path.

 The coolant flow path may include a first coolant flow path formed under the upper space and communicating with the upper space and the coolant hole, and a second coolant flow path spaced apart from the first coolant flow path.

The first coolant flow path and the second coolant flow path may be connected to a second coolant flow path connecting hose that guides the coolant of the first coolant flow path to the second coolant flow path.

A coolant outlet hose through which the coolant of the second coolant flow path is guided may be connected to the second coolant flow path.

The coolant flow path may include a third coolant flow path spaced apart from the first coolant flow path and the second coolant flow path.

The first coolant flow path and the third coolant flow path may be connected to a third coolant flow path connecting hose that guides the coolant of the first coolant flow path to the third coolant flow path.

A coolant outlet hose through which the coolant of the third coolant flow path is guided may be connected to the third coolant flow path.

A rib may be formed in the third coolant flow path to horizontally guide the coolant in a direction toward the stator accommodating space within the third coolant flow path.

A coolant outlet hose through which the coolant of the second coolant flow path and the coolant of the third coolant flow path may be connected to the second coolant flow path and the third coolant flow path.

A rib may be formed in the third coolant flow path to horizontally guide the coolant in a direction toward the stator accommodating space within the third coolant flow path.

 The coolant outlet hose may include a second coolant flow path hose part connected to the second coolant flow path, a third coolant flow path hose part connected to the third coolant flow path, and the second coolant flow path hose part and a second coolant flow path hose part. The three coolant flow path hose parts may include a common outlet hose part which is laminated.

The stator may protrude a fastening portion fastened to the motor case to the stator core.

The motor case may include a motor case fastening part to which the fastening part is fastened between the first coolant flow path and the second coolant flow path.

 The motor case may include a motor case fastening part to which the fastening part is fastened between the first coolant flow path and the third coolant flow path.

The motor case may include a motor case fastening part to which the fastening part is fastened between the second coolant flow path and the third coolant flow path.

The second coolant flow path may be formed to be rounded from one side of the front and rear of the stator accommodation space to the lower side of the stator accommodation space, and the third coolant flow path may be formed at the other side of the front and rear of the stator accommodation space. It may be formed to be formed round to the lower side of the.

The motor case may include a motor body in which the upper space, the stator accommodating space, and the coolant flow path are formed, and a motor cover covering the stator accommodating space and the coolant flow path together.

The coolant inlet hose may be connected to one of the peripheral plates forming the upper space of the motor body.

It may include a coolant outlet hose connected to the lower portion of the coolant flow path to guide the coolant of the coolant flow path.

An electric vehicle according to the present invention includes a battery; A motor driven by the battery, the motor comprising: a motor case having a coolant flow path for cooling the stator accommodation space and the stator accommodation space and an upper space formed thereon; A cooling plate disposed in the upper space; An inverter mounted on the cooling plate; A stator disposed in the stator accommodation space; A rotor rotated by the stator; And a coolant inlet hose for guiding the coolant to the upper space, wherein the motor case is integrally formed with a motor case portion in which the stator accommodating space and a coolant flow path are formed, and an inverter case portion in which the upper space is formed. A coolant hole is formed to guide the coolant of the coolant to the coolant flow path.

 The inverter case part and the motor case part may be integrally formed of a synthetic resin member.

 The motor case may include a motor body in which the motor case part is positioned below the inverter case part; It may include a motor cover for covering the stator receiving space and the coolant flow path together.

The present invention has an advantage in that the inverter and the stator are installed together in the motor case so that the number of parts is small and the assemblability is improved, and the inverter and the stator can be sequentially cooled with a simple coolant structure.

  In addition, the coolant is guided to a surface close to the stator in the coolant flow path, so that the cooling effect of the stator is high and the entire interior of the motor can be cooled evenly.

1 is a front view showing a power module of an embodiment of an electric vehicle according to the present invention;
2 is a perspective view showing a motor of an embodiment of an electric vehicle according to the present invention;
3 is a cross-sectional view showing a motor of an embodiment of an electric vehicle according to the present invention;
4 is a cross-sectional view taken along the line AA of FIG.
5 is a side view showing a motor of an embodiment of an electric vehicle according to the present invention;
6 is a perspective view showing a motor body of an embodiment of an electric vehicle according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

 1 is a front view showing a power module of an embodiment of an electric vehicle according to the present invention, Figure 2 is a perspective view of a motor of an embodiment of the electric vehicle according to the present invention, Figure 3 is an embodiment of the electric vehicle according to the present invention Example of the motor is shown in cross-sectional view, Figure 4 is a cross-sectional view taken along line AA of Figure 3, Figure 5 is a side view showing a motor of one embodiment of the electric vehicle according to the invention, Figure 6 is an embodiment of an electric vehicle according to the invention The motor body is a perspective view shown.

The electric vehicle includes a body forming a facade and a chassis installed in the body, and the chassis may include a battery, an axle 2, a power module 4, a steering device, a braking device, and the like. The battery and the power module 4 may be installed in the body frame.

The axle 2 transmits the rotational force of the power module 4 to the wheels, and rotates the wheels 10 in a state in which the axle 2 protrudes to the left and right sides of the power module 4.

The power module 4 is installed in the vehicle body frame to rotate the axle 2, and may include a gear box 6 and a motor 8. The axle 2 may connect the gear box 6 and the wheel 10, and the motor 8 may be connected to the gear box 6.

The gear box 6 is connected to the axle 2 and the motor 8 to transmit the rotational force of the motor 8 to the axle 2, and the gear case 7 which protects the plurality of gears and the plurality of gears. It may include. The gear box 6 may be connected with a drive shaft 9 installed in the motor 8. The drive shaft 9 may be connected to the rotor 50, which will be described later, of the motor 8 to transmit the rotational force of the rotor 50 to the gear box 6.

The gear box 6 may include an input shaft connected to the drive shaft 9, a drive gear connected to the input shaft, a driven gear connected to the axle 2, and at least one transmission gear between the drive gear and the driven gear. have. The driven gear can be connected directly to the axle 2 or via the differential gear to the axle 2. The gear box 6 is shiftable according to the gear ratio of the plurality of gears. The gear box 6 may be configured as a reducer according to the gear ratio of the plurality of gears. The gear box 6 may further comprise a bearing disposed inside the gear case 7 for rotatably supporting the input shaft. The gearbox 6 may be provided with a shift shaft on which a gear is installed.

 The motor 8 is driven by a battery to generate a rotational force for rotating the wheel 10, it may be connected to the gear box 6 and the drive shaft (9). The drive shaft 9 can be connected to the input shaft of the gear box 6.

An inverter for controlling the motor 8 may be installed in the motor 8, and the inverter receives a DC power from a battery and applies a three-phase alternating voltage and current to the motor 8, thereby speeding and torqueing the motor 8. To control.

The motor 8 may be provided with a cooling passage through which a coolant (hereinafter, referred to as a coolant) such as cooling water for cooling the motor 8 passes. The motor 8 may further include a coolant inlet hose 60 through which coolant is obtained, and a coolant outlet hose 70 through which coolant from which the motor 8 is cooled is withdrawn. The electric vehicle may further include a radiator for air-cooling the heated coolant with outdoor air while passing through the motor 8, and a coolant pump for circulating the coolant to the cooling channel and the radiator of the motor 8.

The motor 8 may include a motor case 20 in which a cooling flow path is formed and forms an appearance. The motor case 20 may have an upper space S1 formed thereon. The motor case 20 may have a coolant flow path C for cooling the stator accommodating space S2 and the stator accommodating space S2. The stator accommodation space S2 and the coolant flow path C may be formed below the upper space S1. In the motor case 20, coolant holes 21 and 22 may be formed to guide the coolant in the upper space S1 to the coolant flow path C. The motor case 20 may have a partition wall 23 partitioning the upper space S1 and the coolant flow path C between the upper space S1 and the coolant flow path C, and the coolant hole 21. ) 22 may be formed in a plurality of spaced apart from the partition 23 between the upper space (S1) and the coolant flow path (C). The coolant flow path C may cool the stator accommodation space S2 with the coolant flowing in the upper space S1. The coolant flow path C will be described later in detail.

The motor case 20 may protect the inverter 37, the stator 40, and the rotor 50, which will be described later. The motor case 20 may be integrally formed with a motor case part 20A having a stator accommodating space S2 and a coolant flow path C, and an inverter case part 20B having an upper space S1 formed therein. In the motor case 20, the motor case part 20A and the inverter case part 20B may be integrally formed of a synthetic resin member. The motor case 20A and the inverter case 20B may be integrally formed of reinforced plastic, heat-resistant plastic, or the like. In the motor case 20, the motor case 20A may be positioned below the inverter case 20B. The motor case 20 may be made entirely of synthetic resin members, and part of the motor case 20 may be made of synthetic resin members.

 The motor case 20 may include a motor body 27 in which an upper space S1, a stator accommodating space S2, and a coolant flow path C are formed. The motor body 27 may have the motor case part 20A positioned below the inverter case part 20B, and may be formed of a synthetic resin member. The motor case 20 includes a motor cover 29 coupled to the motor body 27 to cover the stator accommodation space S2 and the coolant flow path C together.

The motor body 27 may include a side plate part 28 that forms the stator accommodation space S2 and the coolant flow path C together with the motor cover 29.

The upper surface of the upper space S1 of the motor body 27 may be opened. The motor body 27 has an upper front plate 31, an upper rear plate 32, an upper left plate 33, and an upper right plate 34 for circumferential plates 31, 32, 33, 34. Can be configured. The motor body 27 may have the upper front plate 31, the upper rear plate 32, the upper left plate 33, and the upper right plate 34 together with the partition 23 to form the upper space S1. have. The motor body 27 is a coolant in which a coolant flows into the upper space S1 into one of the upper front plate 31, the upper rear plate 32, the upper left plate 33, and the upper right plate 34. Inlet hole 34 ′ may be formed. In the motor body 27, the upper front plate 31, the upper rear plate 32, the upper left plate 33, the upper right plate 34, and the partition wall 23 may constitute the inverter case part 20B. have. In the motor body 27, a portion of the motor body 27 located above the partition 23 may be an inverter case part 20B, and a portion located below the partition 23 may be a motor case part ( 20A). The partition 23 may have an upper surface of a portion of the inverter case 20B, and a lower surface of the partition 23 may be a portion of the motor case 20B.

The motor cover 29 may form an external appearance of the other side of the motor 8. The motor cover 29 may cover one of the upper right plates 34 of the upper left plates 33. The motor cover 29 may have a coolant inlet hose through hole 29 ′ through which the coolant inlet hose 60 to be described later is formed. The motor cover 29 may be made of the same material as the motor body 27. The motor cover 29 may be formed of a synthetic resin member.

 The motor 8 includes a cooling plate 36 disposed in the upper space S1; It may include an inverter 37 mounted on the cooling plate.

The cooling plate 36 may include a plate body 38 on which the inverter 37 is mounted, and a plurality of fins 39 protruding orthogonal to the plate body 38 on one surface of the plate body 38.

The cooling plate 36 may be installed such that the plate 38 faces upward and the plurality of fins 39 face downward. Cooling plate 36 may be in contact with the upper surface of the partition wall 23, the lower end of the plurality of fins (39). Here, the plurality of pins 39 may form an inverter case part coolant flow path that guides the coolant introduced into the inverter case part 20B. The coolant may cool the plurality of fins 39 while flowing between the plate body 38 and the partition wall 23 of the cooling plate 36, and then the coolant located below the partition wall 23 through the partition wall 23. It may flow to the runt flow path (C).

The coolant 36 may pass through the coolant between the plurality of fins 39, and the coolant may cool the cooling plate 36 while being distributed between the plurality of fins 39. The cooling plate 36 may be accommodated in the inverter case 20B together with the inverter 37.

The inverter 37 may generate heat when the motor 8 is driven, and may radiate heat to the cooling plate 36 when the coolant passes through the upper space S1.

The motor 8 includes a stator 40 disposed in the stator accommodation space S2 and having a hollow shape and a coil; It may include a rotor 50 having a magnet rotated by the stator 40.

The stator 40 may have a hollow cylindrical shape and may include a stator core 42 and a coil 44 wound around the stator core 42. The stator 40 may be fixed to at least one of the motor body 27 and the motor cover 29 by a stator bracket (not shown).

The rotor 50 may include a rotation shaft 52, a rotor core 54 provided on an outer surface of the rotation shaft 52, and a magnet 56 installed on the rotor core 54. The rotor 50 may be rotatably supported by the motor case 20.

The rotation shaft 52 may be longer than the length of the stator 40. The rotating shaft 52 may be rotatably supported by the motor case 20. The rotating shaft 52 may be rotatably installed on the motor body 27 and the motor cover 29 by the bearings 57 and 58. The bearings 57 and 58 are fixed to the motor body 27 so as to rotatably support one side of the rotating shaft 52 and the other side of the rotating shaft 52 fixed to the motor cover 29. It may include a second bearing 58 to rotatably support the. The first bayer 57 may be installed at the side plate portion 28 of the motor body 27.

The rotor core 54 may be installed outside a portion of the rotation shaft 52.

The magnets 56 may be disposed on an outer circumferential surface of the rotor core 54, and a plurality of magnets 56 may be disposed.

In the electric vehicle, one of the drive shaft 9 and the rotor 50 may pass through the motor body 27 and the motor cover 29.

The motor 8 may include a coolant inlet hose 60 for guiding the coolant into the upper space S1. The motor 8 may include a coolant outlet hose 70 connected to the lower portion of the coolant flow path C to guide the coolant of the coolant flow path C.

The coolant inlet hose 60 may be connected to one of the perimeter plates 31, 32, 33, 34 forming the upper space S1 of the motor body 27.

 The coolant inlet hose 60 may have an outlet end for exiting the coolant into the upper space S1 and communicate with the upper space S1. The coolant inlet hose 60 may be disposed to protrude from the motor case 20. The coolant inlet hose 60 is not connected to the plate 33 that is closest to the gear box 6 among the circumferential plates 31, 32, 33, 34, and that the distance to the gear box 6 is It may be connected to the furthest plate 34.

The coolant may be introduced into the upper space S1 through the coolant inlet hose 60, and cool the cooling plate 36 while passing through the upper space S1. The coolant for cooling the cooling plate 36 may enter the coolant flow path C through the coolant holes 21 and 22. The coolant introduced into the coolant flow path C may pass through the coolant flow path C, and the heat discharged from the stator accommodation space S2 may be absorbed by the coolant passing through the coolant flow path C. After absorbing the heat of the upper space S1 primarily and the second absorbing heat of the stator accommodating space S2, the coolant may finally exit the motor 8 through the coolant outlet hose 70. .

The coolant flow path C may be formed in a shape in which one coolant flow path surrounds the stator accommodation space S2. The coolant flow path C may have a cross-sectional shape in a ring shape, and the coolant flowing from the upper space S1 to the upper part of the coolant flow path C may be dispersed before and after the coolant flow path C. It may flow to the bottom, it may be discharged through the coolant outlet hose 70 in the lower portion of the coolant flow path (C).

In the coolant flow path C, a plurality of coolant flow paths may divide and surround the stator accommodation space S2. That is, in the coolant flow path C, two flow paths or three or more flow paths can divide and surround the stator accommodation space S2. When the coolant flow path C includes a plurality of coolant flow paths, the coolant flow path positioned at the uppermost side may communicate with the upper space S1 and the coolant holes 21 and 22, and are located at the lowermost level. The coolant flow path is connected to the coolant outlet hose 70, and the coolant flow path may be connected to the coolant flow path connection hose. When the coolant flow path C includes a plurality of coolant flow paths, at least one coolant flow path C may be rounded in an arc shape.

The coolant flow path C is formed below the upper space S1 and communicates with the upper space S1 and the coolant holes 21 and 22, and the first coolant flow path C1. It may include a second coolant flow path (C2) spaced apart from (C1). The coolant flow path C may include a third coolant flow path C3 spaced apart from the first coolant flow path C1 and the second coolant flow path C2.

The first coolant flow path C1 may be located above the stator accommodation space S2. One end of the first coolant flow path C1 may be close to the second coolant flow path S2 of the second coolant flow path C2 and the third coolant flow path C3. The other end of the first coolant flow path C1 may be close to the third coolant flow path S3 of the second coolant flow path C2 and the third coolant flow path C3. The second coolant flow path C2 may be formed to be rounded to the lower side of the stator accommodation space S2 at one side of the front and rear of the stator accommodation space S2. A rib 35 ′ may be formed in the second coolant flow path C3 to guide the coolant horizontally in the second coolant flow path C2 in the direction toward the stator accommodation space S2. The third coolant flow path C3 may be formed to be formed to be formed round to the lower side of the stator accommodation space S2 on the other side of the front and rear of the stator accommodation space S2. A rib 35 ″ may be formed in the third coolant flow path C3 to guide the coolant horizontally in the third coolant flow path C3 toward the stator accommodation space S2.

The first coolant flow path C1 and the second coolant flow path C2 are connected to a second coolant flow path connecting hose guiding the coolant of the first coolant flow path C1 to the second coolant flow path C2. 80). The coolant outlet hose 70 through which the coolant of the second coolant flow path C2 is guided may be connected to the second coolant flow path C2. The second coolant flow path connecting hose 80 may be configured as a U tube having an inner cross-sectional shape having a '⊃' shape. One end of the second coolant flow path connecting hose 80 may communicate with the first coolant flow path C1 and the other end may communicate with the second coolant flow path C2.

The first coolant flow path C1 and the third coolant flow path C3 are each connected to a third coolant flow path hose 90 that guides the coolant of the first coolant flow path C1 to the third coolant flow path C3. ) Can be connected. The coolant outlet hose 70 through which the coolant of the third coolant flow path C3 is guided may be connected to the third coolant flow path C3. The third coolant flow path connecting hose 90 may be configured as a U tube having an inner cross-sectional shape having a '⊃' shape. One end of the third coolant flow path connecting hose 90 may communicate with the first coolant flow path C1 and the other end may communicate with the third coolant flow path C3.

Coolant outlet hoses 70 through which coolant of the second coolant flow path C2 and coolant of the third coolant flow path C3 are guided to the second coolant flow path C2 and the third coolant flow path C3. ) May be connected. The coolant outlet hose 70 may include a second coolant flow path hose part 71 connected to the second coolant flow path C2, a third coolant flow path hose part 72 connected to the third coolant flow path, and The second coolant flow path hose part and the third coolant flow path hose part may include a common outlet hose part 73.

In the stator 40, the fastening parts 46, 47, and 48 that are fastened to the motor case 20 may protrude from the stator core 42. A plurality of fastening parts 46, 47, 48 may be spaced apart in the circumferential direction of the stator core 42. The fastening parts 46, 47, and 48 may have a through hole through which a fastening member for fastening the stator core 42 to the motor case 20 passes.

The motor case 20 may include a motor case coupling part 106 to which the coupling part 46 is coupled between the first coolant flow path C1 and the second coolant flow path C2. In the motor case 20, a motor case fastening part 107 may be formed in which the fastening part 47 is fastened between the first coolant flow path C1 and the third coolant flow path C3. The motor case 20 may include a motor case fastening part 108 in which the fastening part 48 is fastened between the second coolant flow path C2 and the third coolant flow path C3.

 The motor case 20 includes the motor cover when the side plate portion 28 of the motor body 27 and the side plate portion 28 of the motor body 27 of the motor cover 29 face the gear box 6. 29 may be arranged not facing the gear box 6. When the side plate portion 28 of the motor body 27 is disposed to face the gear box 6, the coolant outlet hose 70, the second coolant flow connection hose 80, and the third coolant flow connection hose ( 90 may be connected to the motor cover 29.

The motor case 20 includes the side plate portion 28 of the motor body 27 and the side plate portion of the motor body 27 when the motor cover 29 of the motor cover 29 faces the gear box 6. The 28 can be arranged not facing the gear box 6. When the motor cover 29 is disposed to face the gear box 6, the coolant outlet hose 70, the second coolant flow connection hose 80, and the third coolant flow connection hose 90 are connected to the motor. It may be connected to the side plate portion 28 of the body 27.

Referring to the operation of the present invention configured as described above are as follows.

First, the inverter 37 may drive the motor 8 during the operation of the electric vehicle. The rotor 50 can be rotated, the rotational force of the rotor 50 can be transmitted to the gear box 6, the rotational force transmitted to the gear box 6 can be transmitted to the wheel through the axle (2) The electric vehicle may be driven by the rotational force generated by the motor 8.

In the electric vehicle, when the motor 8 is driven as described above, the motor 8 may generate heat, and in particular, the stator 40 having the coil 44 and the inverter 37 may generate heat. In the electric vehicle, the coolant pump may be driven together with the driving of the motor 8, and the coolant may circulate the cooling passages of the writer and the motor 8. The coolant may enter the upper space S1 through the coolant inlet hose 60, may cool the cooling plate 36 while passing through the upper space S1, and the heat of the inverter 37 may be cooled. Through 36 may be endothermic to the coolant. Cooling water cooling the cooling plate 36 may be introduced into the coolant flow path C through the coolant holes 21 and 22. The coolant passing through the coolant holes 21 and 22 may flow into the first coolant flow path C1 and may be widely distributed back and forth in the first coolant flow path C1. The coolant of the first coolant flow path C1 may absorb heat transferred through the partition 23 in the stator accommodation space S2.

The coolant flowing to the front of the first coolant flow path C1 may be moved to the second coolant flow path C2 through the second coolant flow path connecting hose 80, and to the second coolant flow path C2. Can be introduced to the top. The coolant introduced into the upper portion of the second coolant flow path C2 may absorb the heat transferred in the front direction of the motor 8 from the stator accommodation space S2 while falling along the second coolant flow path C2. The drop may fall below the second coolant flow path C2.

The coolant flowing to the rear part of the first coolant flow path C1 may be moved to the third coolant flow path C3 through the third coolant flow path connecting hose 90, and then to the third coolant flow path C3. Can be introduced to the top. The coolant introduced to the upper portion of the third coolant flow path C3 may absorb heat transferred to the rear of the motor 8 from the stator accommodation space S2 while falling along the third coolant flow path C3. The drop may fall below the third coolant flow path C3.

The coolant dropped to the lower portion of the second coolant flow path C2 and the coolant dropped to the lower portion of the third coolant flow path C3 flow into the coolant outlet hose 70, and from the coolant outlet hose 70. Can be combined.

8: motor 20: motor case
27: motor body 29: inner motor body
36: cooling plate 37: inverter
40: stator 50: rotor
60: coolant inlet hose 70: coolant outlet hose
80: second coolant flow path hose 90: third coolant flow path hose

Claims (20)

battery; A motor driven by the battery; And a motor case in which the motor is installed.
The motor case,
An inverter case part having an upper space formed therein; A motor case part having a stator accommodation space formed therein; And a coolant flow path disposed in the motor case and disposed to surround the stator accommodation space.
The motor may include a rotor disposed in the accommodation space; And a stator disposed in the accommodation space and surrounding the rotor.
A cooling plate is disposed in the upper space, the inverter is mounted on the cooling plate,
The upper space is disposed above the stator accommodation space,
A partition wall partitioning the upper space and the stator accommodation space is disposed,
A coolant hole penetrates the partition wall and communicates the upper space and the coolant flow path.
The coolant flow path,
A first coolant flow path (C1) disposed below the upper space and disposed above the stator accommodation space and communicating with the upper space through the coolant hole;
A second separation from the first coolant flow path C1, disposed below the first coolant flow path C1, disposed on the right side of the rotor, and formed to surround the right side of the stator accommodation space; Coolant flow path C2;
A third separated from the first coolant flow path C1, disposed below the first coolant flow path C1, disposed on the left side of the rotor and wrapped around the left side of the stator accommodation space; It includes a coolant flow path (C3),
It is disposed outside the motor case part, connects the first coolant flow path (C1) and the second coolant flow path (C2), a portion of the coolant of the first coolant flow path (C1) to the second cool The second coolant flow path connecting hose provided to the runt flow path C2 is disposed,
It is disposed outside the motor case part, connects the first coolant flow path (C1) and the third coolant flow path (C3), the remaining of the coolant of the first coolant flow path (C1) to the third cool An electric vehicle in which a third coolant flow path connection hose provided to the runt flow path C3 is disposed. The method of claim 1,
The second coolant flow path connection hose and the third coolant flow path connection hose based on the rotor is symmetrical electric vehicle. The method of claim 1,
The second coolant flow path (C2) and the third coolant flow path (C3) on the basis of the rotor symmetrical electric vehicle. The method of claim 1,
And a coolant outlet hose connected to the second coolant flow path C2 and the third coolant flow path C3.
The coolant outlet hose,
A second coolant flow path hose part coupled to the outside of the motor case part and connected to the second coolant flow path (C2); A third coolant flow path hose part coupled to the outside of the motor case part and connected to the third coolant flow path (C3); And a common outlet hose part in which the second coolant flow path hose part and the third coolant flow path hose part are laminated.
And the second coolant flow path hose part is coupled to the lower side of the second coolant flow path (C2), and the third coolant flow path hose part is coupled to the bottom of the third coolant flow path (C3). The method of claim 4, wherein
The second coolant flow path connecting hose is disposed between the upper space and the second coolant flow path C2, and the third coolant flow path connecting hose is disposed between the upper space and the third coolant flow path C3. Become,
The coolant outlet hose is disposed lower than the second coolant flow path connection hose and the third coolant flow path connection hose. The method of claim 4, wherein
And an rib disposed in the second coolant flow path and horizontally disposed in a direction toward the stator accommodation space. The method of claim 4, wherein
And an rib disposed in the third coolant flow path and horizontally disposed in a direction toward the stator accommodation space. The method of claim 4, wherein
A coolant inlet hose is provided in which the coolant is obtained,
The coolant inlet hose is disposed higher than the coolant hole. delete delete The method of claim 1,
The stator may include a stator core disposed in the stator accommodation space; A coil wound around the stator core; The fastening part protruding outward from the stator core and fastened to the motor case part, further comprising:
The fastening part is an electric vehicle disposed between the first coolant flow path (C1) and the second coolant flow path (C2). The method of claim 1,
The stator may include a stator core disposed in the stator accommodation space; A coil wound around the stator core; The fastening part protruding outward from the stator core and fastened to the motor case part, further comprising:
The fastening part is an electric vehicle disposed between the first coolant flow path (C1) and the third coolant flow path (C3). The method of claim 1,
The stator may include a stator core disposed in the stator accommodation space; A coil wound around the stator core; The fastening part protruding outward from the stator core and fastened to the motor case part, further comprising:
The fastening part is an electric vehicle disposed between the second coolant flow path (C2) and the third coolant flow path (C3). The method of claim 1,
The second coolant flow passage is formed to be rounded to the lower side of the stator accommodation space from one side of the front and rear of the stator accommodation space,
The third coolant flow path is formed in a round shape formed in the other side of the front and rear of the stator receiving space to the lower side of the stator receiving space. The method of claim 1,
The motor case further includes a motor cover covering the stator accommodation space, the first coolant flow path (C1), the second coolant flow path (C2), and the third coolant flow path (C3) together. delete delete delete The method of claim 1,
The inverter case part and the motor case part is an electric vehicle integrally formed with a synthetic resin member. delete

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