TWM575775U - Electric drive system and automobile comprising the same - Google Patents

Abstract

The present invention relates to an electric drive system and a car including the electric drive system. The electric drive system includes a motor, a motor controller, and a heat sink member between the motor and the motor controller, the heat sink member including at least a first space and a second space spaced apart from the first space, Wherein the protruding terminal of the motor and the protruding terminal of the motor controller are electrically connected in the first space, and the second space is provided with a flow path, so that coolant flows through the flow path at the motor The controller motor is transported between the motors. This creation has improved overcurrent and power capabilities.

Description

Electric drive system and a car including the same

The present invention relates to an electric drive system and a car including the electric drive system.

The motor drive system includes a power electronic converter and a corresponding controller. The power electronic converter consists of solid-state devices whose main function is to transfer a large amount of energy from the power source to the motor input. The controller is usually composed of a microcontroller or a digital signal processor and associated small-signal electronic circuits, and its main function is to process information and generate switching signals required for the power converter semiconductor switching device.

Now the motor and the motor controller are electrically connected by a high-voltage harness and a water pipe is used to form a cooling system between the two. The wiring harness connection cost is high, and the temperature rise of the wire harness limits the overcurrent capability of the electric drive system, and the water pipe is more Long and takes up a lot of space.

The technical problem to be solved by the present invention is to provide an electric drive system to overcome the problems of the prior art described above.

One aspect of the present disclosure is to provide an electric drive system including a motor, a motor controller, and a heat sink member between the motor and the motor controller, the heat sink member including at least a first space and a first space a second space separated, wherein the protruding terminal of the motor is electrically connected to the protruding terminal of the motor controller in the first space, and the second space is provided with a flow path for the coolant to pass through The flow path is conveyed between the motor controller and the motor.

Wherein in the electric drive system, the first space facing the motor is provided with a first inlet such that the protruding terminal of the motor enters the first space via the first inlet and the second facing the motor controller An inlet for the protruding terminal of the motor controller to enter the first space via the second inlet, the protruding terminal being electrically connected to the protruding terminal in the first space, the second space facing the motor A flow passage opening communicating with the flow passage is provided, and a flow passage opening communicating with the flow passage is provided to the motor controller.

Wherein in the electric drive system, the motor and the motor controller are disposed on opposite sides of the heat sink member.

Wherein in the electric drive system, a gearbox coupled to the motor and the motor controller is located between the motor and the motor controller, and the heat sink member is fixed to the gearbox.

Wherein in the electric drive system, the flow passage opening provided to the motor controller is adjacent to the second inlet, and the flow passage opening facing the motor is adjacent to the first inlet.

Wherein, in the electric drive system, the water channel is bent and disposed under a position where the terminals of the motor and the motor controller are connected to increase a cooling area of the flow channel to the terminal.

Wherein in the electric drive system, the terminals of the motor or motor controller are a plurality of busbars for multi-phase electrical connection of the motor or the motor controller, terminals of the motor and the The terminals of the motor controller are correspondingly connected inside the heat sink member.

Wherein in the electric drive system, the heat sink member comprises a thermally conductive insulating gasket disposed between a terminal of the motor and motor controller and the flow passage.

Another aspect of the present invention is to provide an automobile comprising the electric drive system of any of the above embodiments, the electric drive system being disposed at the front, the rear, or the front and the rear of the automobile.

Inside the heat sink element of the present invention, divided into spaced apart working spaces for different purposes, the extended terminal of the motor is electrically connected to the extended terminal of the motor controller in the first space. There is a flow path in the second space, and the coolant is transported between the motor controller and the motor through the flow path.

The terminals of the motor and the motor controller are connected in the first space through the first inlet and the second inlet, and the cooling system of the motor controller and the cooling system of the motor pass through the flow passage through the flow passage opening facing the motor controller and the runner opening facing the motor connection. The heat generated by the terminal connection is used to dissipate heat, which reduces the temperature of the terminal and improves the overcurrent and power capability of the electric drive system.

The electric drive system is an integrated electric drive system that integrates a motor, motor controller and gearbox. The internal part of the radiator part realizes the electrical connection between the motor and the motor controller without unnecessary wiring harness, and realizes the integration of the cooling system of the motor and the motor controller and the whole vehicle cooling system. Compared with the original water pipe connection, the flow path is arranged. Can shorten the length and save space.

The inlet and outlet of the heat sink member of the present invention are sealed and docked with the motor or the motor controller, and the heat sink member of the present invention shields the space through the cover plate, thereby ensuring electrical connection performance and cooling capability.

Other aspects and features of the present invention will become apparent from the following detailed description of the drawings. However, it should be understood that the drawings are only for the purpose of explanation, and are not intended to limit the scope of the present invention, as it should be referred to the appended claims. It is also to be understood that the drawings are not intended to

To assist those skilled in the art to understand the claimed subject matter, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

1 and 2 are a front view and a perspective view, respectively, of an electric drive system involved in the present creation. As shown, the electric drive system includes a motor 1, a motor controller 2, and a heat sink member 3 located between the motor 1 and the motor controller 2. The motor 1 and the motor controller 2 are electrically connected to each other within the heat sink member 3, and the cooling system of the motor 1 and the cooling system of the motor controller 2 are connected via the heat sink member 3. At the same time, the heat generated by the electrical connection of the motor 1 and the motor controller 2 is dissipated by the cooling action of the heat sink member 3.

According to this example of the invention, the electric drive system is an integrated electric drive system, which is integrated with a gearbox 4 in addition to the motor 1 and the motor controller 2. Here, the motor 1, the motor controller 2 and the gearbox 4 are each a separate and separate package, the three being assembled together by mechanical connection. The input shaft or output shaft direction of the motor 1 is parallel to the input shaft or output shaft of the transmission 4 (see 41 for the output shaft). This arrangement is extremely compact and integrated for easy installation into the car. The mechanical connection between the motor 1, the motor controller 2 and the gearbox 4 may be such that the end face of the motor 1 is connected to the end face of the gearbox 4 facing the motor side via a flange connection face, and the end face of the motor controller 2 is connected by a flange The face is connected to the end face of the gearbox 4 facing the motor controller side.

The heat sink member 3 is fixed to the gearbox 4, for example, by bolting. The heat sink member 3 and the motor 1 and the heat sink member 3 and the motor controller 2 are sealed to each other.

Figure 3-5 is a schematic structural view of a heat sink member. In conjunction with these figures, the heat sink member 3 includes at least a first space (not labeled) and a second space (not labeled) spaced apart from the first space, the extended terminal 11 of the motor 1 and the extended terminal 21 of the motor controller 2 Electrically connected in the first space, a flow path 35 is provided in the second space, so that the coolant is transported between the motor controller 2 and the motor 1 through the flow path 35.

Referring to FIGS. 4 and 5, according to an example of the present invention, the first space facing motor 1 is provided with a first inlet 31, and the motor controller 2 is provided with a second inlet 32. The second space facing motor 1 is provided with a flow port 34 and the motor controller 2 is provided with a flow port 33. In the following specific example, the flow port 34 is referred to as a first outlet 34 and the runner port 33 is referred to as a third inlet 33. .

The projecting terminal 11 of the motor 1 and the projecting terminal 21 of the motor controller 2 enter the heat sink member 3 via the first inlet 31 and the second inlet 32, respectively, and are connected in the first space. The interior of the heat sink member 3 is also provided with a flow passage 35 in a second space, the flow passage 35 being connected to the third inlet 33 and the first outlet 34 (as in Fig. 5) to enable liquid to enter the flow passage 35 from the third inlet 33. Further, it flows out from the first outlet 34, thereby transferring the coolant between the motor controller 2 and the motor 1. The coolant from the cooling system of the motor controller 2 enters the flow passage 35 of the radiator member 3 via the third inlet 33 and exits the flow passage 35 via the first outlet 34 to enter the cooling system of the motor 1. The coolant can be water or a mixture of water and ethylene glycol. It should be noted that the flow path of the coolant flowing from the motor controller into the radiator member and flowing into the motor is part of the entire vehicle cooling circuit. In operation, the coolant flows in one direction, ie the coolant flows from the motor controller to the motor. In the non-operating state, the coolant stays in each cooling system and flow path. According to this illustrative, non-limiting example of the invention, the coolant first enters the motor controller to cool it and then enters the motor 1 via the heat sink member 3, such that the coolant is first cooled at a lower temperature. Motor controller, which is very beneficial for the cooling of some heat sensitive electronic components in the motor controller.

In this example, the first inlet 31 is a communication port covering all the terminals 11 of the motor 1, and allows a plurality of terminals to enter the heat sink member 3 via one turn, and the second inlet 32 is a communication port covering all the terminals 21 of the motor controller 2, A plurality of terminals are allowed to enter the heat sink member 3 via one turn. The terminals 11, 21 of the motor 1 and the motor controller 2 may be a plurality of bus bars, which are also referred to as copper bars. In the illustrated embodiment, the communication ports are flat elongated holes that are formed on both sides of the heat sink member, each of which accommodates three copper rows. Of course, the number of copper bars is not limited to three, and may be more or less than three. The number of copper bars depends on the number of phase lines of the motor, and the terminals 1 , 21 of the motor 1 and the motor controller 2 are arranged to be correspondingly connected within the heat sink element 3 . In addition, it should be noted that, in the example of the present invention, the first inlet 31 and the second inlet 32 respectively receive a plurality of terminals at the same time. In other examples, the first inlet 31 and the second inlet 32 may respectively include multiple The inlets, for example, correspond to one terminal, one inlet, etc.; similarly, as an alternative example, the first space can be further divided into a plurality of small spaces, each of which can accommodate one or more terminals.

Returning to FIG. 4, the third inlet 33 is a circular hole adjacent to the second inlet 32, and the first outlet 34 is a circular hole adjacent to the first inlet 31. The first inlet 31 and the first outlet 34 are respectively butted with the terminal 马达 of the motor 11 and the cooling system ,, and the second inlet 32 and the third inlet 33 are respectively butted with the terminal 马达 of the motor controller 2 and the cooling system 埠. A sealing strip 5 substantially along the shape of the hole is provided on the above-mentioned inlet and outlet of the heat sink member 3 to abut against the motor 1 and the motor controller 2, thereby achieving gas sealing and fluid sealing. It can be known that the first inlets do not have to be arranged on the motor side, they can be arranged on the motor controller side. The first outlets are also not necessarily arranged on the same side as the first inlet, and they may be provided separately. For the same reason, the same is true for the second entrance and the third entrance. It should also be noted that the shapes of the respective inlets and outlets mentioned herein are to match the shape of the terminal turns to be connected thereto, and their shapes are not limited to those described herein in practical applications.

The electrical connection between the terminals 11, 21 from the motor 1 and the motor controller 2 is effected in the first space of the heat sink 3, while the coolant is passed through the flow passage 35 in the second space. It can be seen that the heat sink member 3 of the present invention achieves the connection of the electrical connection and the cooling system of the motor 1 to the motor controller 2 without the need for other harnesses or water pipes, and since the first space is separated from the second space (described further below) The relationship between a space and the second space) thus makes the electrical connection unaffected by any coolant. At the same time, the coolant can be dissipated to the terminal connection by the flow path in the second space corresponding to the cooling liquid disposed below the terminal connection.

The heat sink member 3 is a box structure. The box structure includes a housing 36 that is internally divided by a partition (not shown) into a first space for electrical connection of the motor 1 and the motor controller 2 and a cooling system connection for the motor 1 and the motor controller 2 The second space. The first space is shown in Figure 4, and Figure 5 is the reverse of the heat sink of Figure 4, showing the second space. The divider can be separate or integrated with the housing. The terminals 1 and 21 of the motor 1 and the motor controller 2 enter the first space via the first inlet 31 and the second inlet 32 and are connected. In the illustrated embodiment, the copper row ends are provided with connection holes, and the copper bars from the motor and the copper bars from the motor controller are aligned by the connection holes, and the screws 6 are screwed to realize the copper bus connection.

The flow path 35 is disposed in the second space and passes under the terminals 11, 21. In order to increase the cooling area, the path of the flow path 35 is concentrated as much as possible in the place where the heat generated by the connection of the terminals 11, 21 is large. As can be seen from FIG. 5, the flow path 35 is arranged as a bending path below the place where the two terminals are connected, and the coolant traverses below the terminal in the x1 direction shown in the figure, and then the turn is traversed below the terminal in the opposite direction x2 in the figure. Returning, this increases the area of cooling of the terminals.

An insulating spacer 7 is disposed between the terminals 11, 21 and a spacer not shown to avoid conduction. The insulating spacer 7 is also thermally conductive, which is advantageous for exerting the cooling effect of the coolant in the flow channel. An insulating block 8 is added at the place where the terminals are connected for pressing the terminal and the gasket.

The heat sink member 3 further includes cover plates 91, 92, and a first mounting hole 37 is left in the housing 36 of the heat sink member, and the first cover plate 91 is attached to the heat sink member 3 by bolts or screws to shield the first space. The second cover plate 92 shields the second space, and the second cover plate 92 is mounted on the same principle as the first cover plate 91.

A second mounting hole 38 is also provided on the outer side of the housing 36 of the heat sink member for the connection of the heat sink member 3 to the gearbox 4.

Returning to Fig. 1 and Fig. 2, the installation process of the electric drive system involved in the present creation is described below. First, the second cover 92 can be mounted to the heat sink member 3 to shield the second space before installation. Then, the heat sink member 3 is fixed to the transmission case 4 through the second mounting hole, and the motor 1 is fixed to the motor side of the transmission case 4 through the mounting end face. After the motor 1 is mounted, the terminal of the motor 1 enters the interior of the heat sink member 3 through the first inlet, and the input flow path of the cooling system of the motor 1 is docked and sealed with the flow path of the heat sink member 3 through the first outlet. The motor controller 2 is then fixed to the other side of the gearbox 4 through the mounting end face, the terminal of the motor controller 2 enters the interior of the heat sink member 3 through the second inlet, and the output flow path of the motor controller 2 passes through the third inlet and The flow path of the heat sink member 3 is butted and sealed. An insulating spacer has been disposed in the heat sink member 3. The terminal and the gasket are pressed by the insulating block. The terminals of the motor 1 are aligned with the terminals of the motor controller 2, and the screws connect the terminals of the two together. Finally, the first cover 91 is mounted to the heat sink member 3 through the first mounting hole 37 to shield the first space.

Depending on the driving method of the car, especially the electric car, such as two-wheel drive or four-wheel drive, or front-wheel drive or rear-wheel drive, the electric drive system involved in this creation can be arranged in front of the car, behind the car, or in front of the car.

While the specific embodiment of the present invention has been shown and described in detail to explain the principles of the present invention, it is understood that the present invention can be implemented in other ways without departing from the principles.

1‧‧‧Motor

2‧‧‧Motor controller

3‧‧‧ Radiator parts

4‧‧‧Transmission

5‧‧‧ Sealing strip

6‧‧‧ screws

7‧‧‧Insulation gasket

8‧‧‧Insulation block

11‧‧‧ Terminal

21‧‧‧ terminals

31‧‧‧ first entrance

32‧‧‧second entrance

33‧‧‧Railway, third entrance

34‧‧‧Railway, first exit

35‧‧‧ flow path

36‧‧‧Shell

37‧‧‧First mounting hole

38‧‧‧Second mounting hole

41‧‧‧ Output shaft

91‧‧‧ cover, first cover

92‧‧‧ cover, second cover

X1, x2‧‧‧ direction

The present invention will be more fully understood from the following detailed description of the embodiments of the invention. 1 is a front view of an embodiment of an electric drive system according to the present invention; FIG. 2 is a perspective view of the electric drive system of FIG. 1; FIG. 3 is an embodiment of a heat sink member of the electric drive system of the present invention. Figure 3 is a perspective view; Figure 4 shows the internal structure of the heat sink member of Figure 3 after removal of the cover on one side thereof; and Figure 5 shows the heat sink member of Figure 3 on the other side thereof. The internal structure after the cover is removed.

Claims (9)

An electric drive system, characterized in that the electric drive system comprises a motor (1), a motor controller (2), and a heat sink member (3) between the motor (1) and the motor controller (2) The heat sink member (3) includes at least a first space and a second space spaced apart from the first space, wherein the protruding terminal I (11) of the motor (1) and the motor controller (2) An extension terminal II (21) is electrically connected in the first space, and a flow path (35) is disposed in the second space so that coolant flows through the flow path (35) at the motor controller (2) Between the motor and the motor (1). The electric drive system according to claim 1, wherein the first space facing the motor (1) is provided with a first inlet (31) such that the protruding terminal I(11) of the motor (1) is via a first inlet (31) enters the first space, and a motor-oriented controller (2) is provided with a second inlet (32) for the protruding terminal II (21) of the motor controller (2) to pass through the second inlet (32) entering the first space, the protruding terminal I (11) and the protruding terminal II (21) are electrically connected in the first space, and the second space is disposed facing the motor (1) There is a flow path port I (34) communicating with the flow path (35), and a flow path opening II (33) communicating with the flow path (35) is provided facing the motor controller (2). The electric drive system according to claim 1, wherein the motor (1) and the motor controller (2) are disposed on opposite sides of the heat sink member (3). The electric drive system according to claim 3, wherein a gearbox (4) connected to the motor (1) and the motor controller (2) is located at the motor (1) and the motor Between the controllers (2), the heat sink member (3) is fixed to the gearbox (4). The electric drive system according to claim 4, wherein the flow path port (33) provided to the motor controller (2) is adjacent to the second inlet (32), and the flow path opening facing the motor (1) I (34) is adjacent to the first inlet (31). The electric drive system according to any one of claims 1 to 5, wherein the flow path (35) is at the extension terminals I, II (11, 21) of the motor and the motor controller. The connected area is bent below to increase the cooling area of the flow path (35) to the protruding terminals I, II (11, 21). The electric drive system according to claim 6, wherein the extension terminals I, II (11, 21) of the motor or motor controller are multiphase for the motor or the motor controller A plurality of bus bars connected in phase, a protruding terminal I (11) of the motor and an extended terminal II (21) of the motor controller are correspondingly connected inside the heat sink member (3). The electric drive system according to claim 6, wherein the heat sink member (3) comprises a thermally conductive insulating spacer (7), the thermally conductive insulating spacer (7) being disposed on the motor and the motor The extension terminals I, II (11, 21) of the controller are interposed between the flow path (35). An automobile comprising the electric drive system according to any one of claims 1 to 8, wherein the electric drive system is disposed at a front, a rear, or a front and a rear of the automobile.