CN219843494U - Electric drive system, copper oil cooling structure thereof and vehicle - Google Patents

Abstract

The utility model provides an electric drive system, a copper oil discharging and cooling structure and a vehicle thereof, wherein a connecting copper bar used for connecting a motor and a motor controller is arranged in an end cover, an insulating seat is arranged between the connecting copper bar and the end cover, cooling grooves are arranged on the insulating seat, the three cooling grooves respectively correspond to three phases of the connecting copper bar, the area of the cooling grooves is smaller than that of the connecting copper bar, and therefore a cooling cavity is formed between the connecting copper bar and the insulating seat by the cooling grooves; the end cover is provided with an end cover cooling channel, one end of the end cover cooling oil way is communicated with the cooling cavity, and the other end of the end cover cooling oil way is communicated with the motor cooling channel of the motor, so that cooling oil in the motor cooling channel flows to the cooling cavity through the end cover cooling channel to cool the connecting copper bars.

Description

Electric drive system, copper oil cooling structure thereof and vehicle

Technical Field

The utility model relates to the technical field of electric drive systems, in particular to an electric drive system, a copper oil cooling discharging structure of the electric drive system and a vehicle.

Background

In the bridge system, the controller and the motor are connected with each other through copper bars to realize current conduction, and the connection position of the copper bars is increased in temperature when a large current passes through due to the existence of contact resistance. When the bridge continuously works with large torque, the connection position of the copper bar continuously heats, so that the failure risk of parts in the cavity is caused.

The prior bridge generally has no copper bar cooling or complex cooling structure, and some adopt a cooling scheme that oil is guided from a motor end cover to a high-pressure cover plate, and cooling oil is sprayed onto the copper bar through three oil spray holes on a cavity of the high-pressure cover plate.

Disclosure of Invention

In order to overcome the technical defects, the utility model aims to provide an electric driving system with a simple cooling structure, a copper oil cooling structure of the electric driving system and a vehicle.

The utility model discloses a copper oil cooling discharging structure of an electric driving system, which comprises a motor and a motor controller, wherein the motor is arranged in a motor shell, and one end of the motor shell is provided with an end cover; a copper bar for connecting the motor and the motor controller is arranged in the end cover, one end of the copper bar is connected with the copper bar of the motor, and the other end of the copper bar is connected with the copper bar of the motor controller, so that the motor and the motor controller are electrically connected; an insulating seat is arranged between the connecting copper bar and the end cover, cooling grooves are arranged on the insulating seat, the three cooling grooves respectively correspond to three phases of the connecting copper bar, and the area of each cooling groove is smaller than that of the connecting copper bar, so that a cooling cavity is formed between the connecting copper bar and the insulating seat by the cooling grooves; the end cover is provided with an end cover cooling channel, one end of the end cover cooling oil way is communicated with the cooling cavity, and the other end of the end cover cooling oil way is communicated with the motor cooling channel of the motor, so that cooling oil in the motor cooling channel flows to the cooling cavity through the end cover cooling channel to cool the connecting copper bars.

Preferably, the cooling cavity comprises a cavity inlet and a cavity body, wherein the width of the cavity inlet is smaller than that of the cavity body, so that cooling oil rapidly enters the cavity body at the cavity inlet.

Preferably, the cooling groove is further provided with a plurality of convex parts, and the cavity body is divided into a plurality of subchambers which are mutually communicated by the convex parts.

Preferably, one or more of the plurality of subchambers are arranged on two sides of the connecting copper bar.

Preferably, the cooling cavity extends to a joint of the connecting copper bar and the motor copper bar; the cooling groove extends towards the motor copper bar at the connecting position and is provided with an oil outlet groove, the oil outlet groove forms an outlet cavity opening of the cooling cavity, and cooling oil in the cooling groove flows out through the outlet cavity opening and contacts the motor copper bar to cool the motor copper bar.

Preferably, the end cover cooling channel comprises a first total channel and three sub-channels, and the three sub-channels are respectively communicated with the three cooling cavities.

Preferably, the end cover cooling channel comprises a second total channel and three oil injection channels, and the three oil injection channels respectively face three phases of the motor copper bar; the second total channel is communicated with the first total channel, and cooling oil in the motor cooling channel is sprayed to the motor copper bar through the first total channel, the second total channel and the oil injection channel.

Preferably, a communication hole is formed in the cooling groove of the insulating seat, and the communication hole corresponds to the second total channel, so that the second total channel is communicated with the cooling cavity.

The utility model also discloses an electric driving system which comprises the copper oil cooling structure.

The utility model also discloses a vehicle comprising the electric drive system.

After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:

1. the end cover and the cooling structure on the insulating seat are used for cooling, so that the connecting copper bars are directly subjected to large-area contact cooling, and the heat of the connecting copper bars is taken away in time; the cooling loop can simultaneously protect the insulating block and the copper bar plastic-coated part, and avoid assembly faults caused by damage of the connecting copper bar and the insulating block due to overhigh temperature; the temperature of the connecting copper bar during working is reduced, so that the requirement on the thickness of the connecting copper bar is reduced, and the aim of reducing cost is fulfilled;

2. because the oil way is designed on the end cover, the oil way on the cover plate is omitted, the cover plate can not be used as a communicating oil way with the end cover and an oil way above the copper bar, the structure of the cover plate can be simplified, the sealing rings of the cover plate and the oil way of the end cover can be removed, the assembly and cost reduction can be optimized, the space inside the end cover and the cover plate can be compressed, the structure is more compact, the material consumption of the shell is minimum, the cost and weight are reduced; and the cover plate can be directly punched into the process type manufacturing after the structure is simplified, so that the manufacturing cost is reduced.

Drawings

FIG. 1 is a schematic diagram of a motor cooling channel, an end cover cooling channel and a cooling cavity connected with a copper bar;

fig. 2 is a schematic structural diagram of a cooling tank on the insulating base according to the present utility model;

FIG. 3 is a schematic diagram of the structure of an insulating base, a connecting copper bar and a motor copper bar provided by the utility model;

FIG. 4 is a schematic diagram of a second total channel and three fuel injection channels according to the present utility model;

FIG. 5 is a schematic view of the structure of the end cap according to the present utility model;

fig. 6 is a schematic structural diagram of an insulating base provided by the present utility model.

Wherein: the cooling device comprises a cooling channel of a 1-motor, a 2-shell, a 3-end cover, a 4-insulating seat, a 5-connection copper bar, a 6-motor copper bar, a 7-cooling groove, an 8-cooling cavity, a 9-cavity inlet, a 10-cavity outlet, an 11-oil injection channel, a 12-first total channel, a 13-sub-channel, a 14-second total channel and a 15-communication hole.

Detailed Description

Advantages of the utility model are further illustrated in the following description, taken in conjunction with the accompanying drawings and detailed description.

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.

In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present utility model, and are not of specific significance per se. Thus, "module" and "component" may be used in combination.

Referring to fig. 1-3, the utility model discloses a copper oil cooling structure of an electric driving system, the electric driving system comprises a motor and a controller, the motor is arranged in a shell 2, one end of the shell 2 is provided with an end cover 3, and the shell 2 and the end cover 3 form a containing space of the motor. It should be noted that, here, the motor refers to an electric drive structure formed by a stator and a rotor, and typically the motor includes the housing 2, but here, for convenience in embodying a separate structure of the housing 2, the motor refers to only the stator and the rotor, and does not include a typical "motor housing 2".

A connecting copper bar 5 used for connecting the motor and the motor controller is arranged in the end cover 3 and used for conducting electricity. One end of the connecting copper bar 5 is connected with a motor copper bar 6 of the motor, and the other end is connected with a controller copper bar of the motor controller, so that the motor is electrically connected with the motor controller.

An insulating seat 4 is arranged between the connecting copper bar 5 and the end cover 3, and the insulating seat 4 is used for fixedly connecting the copper bar 5 and the motor copper bar 6 and ensuring the connection relation between the copper bar 5 and the motor copper bar 6. The insulating seat 4 is provided with cooling grooves 7, the three cooling grooves 7 respectively correspond to three phases of the connecting copper bar 5, and the area of each cooling groove 7 is smaller than that of the connecting copper bar 5, so that a cooling cavity 8 is formed between the connecting copper bar 5 and the insulating seat 4 by the cooling grooves 7. The cooling chamber 8 can be used for direct contact cooling of the connection copper bars 5.

The source of the cooling oil in the cooling cavity 8 is an oil way on the end cover 3, specifically, the end cover 3 is provided with an end cover 3 cooling channel, one end of the end cover 3 cooling oil way is communicated with the cooling cavity 8, and the other end of the end cover 3 cooling oil way is communicated with the motor cooling channel 1 of the motor, so that the cooling oil in the motor cooling channel 1 flows to the cooling cavity 8 through the end cover 3 cooling channel to cool the connecting copper bar 5. So that the motor (here stator, rotor in particular), the end cap 3, the cooling circuit connected to the copper bars 5 are connected to a circulation circuit.

The end cap 3 cooling channel comprises a first total channel 12 and three sub-channels 13, the three sub-channels 13 being in communication with the three cooling chambers 8, respectively. One end of the first total channel 12 is communicated with the three sub-channels 13, and the other end is communicated with the motor cooling channel 1, so that cooling oil in the motor cooling channel 1 is led into the three sub-channels 13. The first total channel 12 and the three sub-channels 13 are not limited in structure, and preferably, the first total channel 12 is disposed perpendicular to the three sub-channels 13, and the first total channel 12 further includes a baffle portion for conducting an axial oil path on the motor into a radial (radial in a non-strict sense) oil path, and the radial oil path is respectively led into the three sub-channels 13 in an axial direction.

Preferably, in order to ensure the flow pressure entering the cooling cavity 8, the cooling cavity 8 is provided with a cavity inlet 9 and a cavity body, and the width of the cavity inlet 9 is smaller than that of the cavity body, so that cooling oil quickly enters the cavity body at the cavity inlet 9. It will be understood that the connection port between the cooling cavity 8 and the cooling channel of the end cover 3 is smaller than the cooling cavity 8, so that the cavity inlet 9 and the cavity body can be realized, which is equivalent to that the smaller cavity inlet 9 (relative to the cavity body) is used for pressurizing the oil entering the cavity body.

Of course, in other embodiments, if the flow pressure entering the cooling cavity 8 is not considered, the cavity inlet 9 may be omitted, and the cooling oil in the cooling channel of the end cover 3 directly enters the cooling cavity 8.

Further, when it is not desired that the cooling oil stays at the connection copper bar 5 for too long time, a plurality of protrusions may be provided on the cooling groove 7, the plurality of protrusions divide the cavity body into a plurality of sub-chambers which are mutually communicated, and the cooling oil flows through the plurality of sub-chambers to cool the connection copper bar 5. By dividing the cavity body into a plurality of sub-chambers which are mutually communicated, the circulation of cooling oil in the cavity body can be quickened (relative to the cavity body) when the cooling oil flows through the plurality of sub-chambers because the space of the sub-chambers relative to the cavity body is reduced.

Furthermore, in order to ensure the cooling effect on the copper bar, one or more of the plurality of subchambers are arranged at two sides of the connecting copper bar 5, so as to realize the surrounding cooling on the connecting copper bar 5.

In a preferred embodiment, the plurality of subchambers form a Chinese character 'shan', namely the subchamber comprises the cavity inlet 9 and the subchambers, one or more of the subchambers are arranged on two sides of the connecting copper bar 5, and the distribution cooling oil has high circulation rate, large flow and good cooling effect.

Preferably, the cooling cavity 8 further includes an outlet 10, specifically, the cooling cavity 8 extends to a connection (i.e. a bolt connection) between the copper bar 5 and the copper bar 6 of the motor, and the cooling groove 7 extends toward the copper bar 6 of the motor at the connection to form an oil outlet groove, and the insulating base 4 cannot form a sealed cavity with the copper bar 5 because the copper bar 5 is not connected at the position (the position of the oil outlet groove), so that the oil outlet groove forms the outlet 10 of the cooling cavity 8.

Further, since the oil outlet groove is faced to the motor copper bar 6, the motor copper bar 6 can be (similarly) cooled by oil injection during oil outlet.

Preferably, referring to fig. 4-6, the cooling channels of the end cover 3 further comprise a second total channel 14 and three oil injection channels 11, wherein the three oil injection channels 11 face three phases of the motor copper bar 6 respectively. The second total channel 14 is communicated with the first total channel 12, the position of the second total channel 14 is lower than one section of the first total channel 12 which is directly communicated with the three sub-channels 13, and cooling oil in the motor cooling channel 1 is sprayed to the motor copper bar 6 through the first total channel 12, the second total channel 14 and the oil spraying channel 11. Thus, by the design of the cooling structure of the end cap 3, there is a contact cooling path (cooling chamber 8) mainly for contact cooling of the connection copper bar 5, and there is also a fuel injection path (three fuel injection channels 11) mainly for cooling of the motor copper bar 6, which can simultaneously cool the connection copper bar 5, the motor copper bar 6 and the insulating base 4.

It should be noted that the second total channel 14 and the three fuel injection channels 11 may be directly cast on the end cover 3, or may be cast on the end cover 3 to form a groove structure, and a channel may be implemented by matching with the bottom surface of the insulating base 4 (this structure may also be understood as a cover plate having a thickness smaller than that of the insulating base 4) to which the copper bar 5 is connected (the insulating base 4/cover plate is press-fitted on the end cover 3).

Further, a communication hole 15 is provided on the cooling groove 7 of the insulating base 4/cover plate, and the communication hole 15 corresponds to the second total channel 14, so that the second total channel 14 and the cooling cavity 8 are communicated, and a connection oil spraying path and a contact cooling path are communicated.

The utility model also discloses an electric driving system which comprises the copper oil cooling structure.

The utility model also discloses a vehicle comprising the electric drive system.

It should be noted that the embodiments of the present utility model are preferred and not limited in any way, and any person skilled in the art may make use of the above-disclosed technical content to change or modify the same into equivalent effective embodiments without departing from the technical scope of the present utility model, and any modification or equivalent change and modification of the above-described embodiments according to the technical substance of the present utility model still falls within the scope of the technical scope of the present utility model.

Claims (10)

1. The copper oil cooling structure of the electric drive system is characterized in that the electric drive system comprises a motor and a motor controller, the motor is arranged in a motor shell, and an end cover is arranged at one end of the motor shell;

a copper bar for connecting the motor and the motor controller is arranged in the end cover, one end of the copper bar is connected with the copper bar of the motor, and the other end of the copper bar is connected with the copper bar of the motor controller, so that the motor and the motor controller are electrically connected;

an insulating seat is arranged between the connecting copper bar and the end cover, cooling grooves are arranged on the insulating seat, the three cooling grooves respectively correspond to three phases of the connecting copper bar, and the area of each cooling groove is smaller than that of the connecting copper bar, so that a cooling cavity is formed between the connecting copper bar and the insulating seat by the cooling grooves;

the end cover is provided with an end cover cooling channel, one end of the end cover cooling oil way is communicated with the cooling cavity, and the other end of the end cover cooling oil way is communicated with the motor cooling channel of the motor, so that cooling oil in the motor cooling channel flows to the cooling cavity through the end cover cooling channel to cool the connecting copper bars.

2. The copper oil drain cooling structure according to claim 1, wherein the cooling cavity comprises a cavity inlet and a cavity body, and the width of the cavity inlet is smaller than the width of the cavity body, so that cooling oil rapidly enters the cavity body at the cavity inlet.

3. The copper oil-cooling structure according to claim 2, wherein the cooling tank is further provided with a plurality of protrusions, and the cavity body is divided into a plurality of subchambers which are communicated with each other by the plurality of protrusions.

4. A copper oil cooling structure according to claim 3, wherein one or more of the plurality of subchambers are provided on both sides of the connecting copper bar.

5. The copper oil cooling structure according to claim 2, wherein the cooling cavity extends to a connection point of the connection copper bar and the motor copper bar;

the cooling groove extends towards the motor copper bar at the connecting position and is provided with an oil outlet groove, the oil outlet groove forms an outlet cavity opening of the cooling cavity, and cooling oil in the cooling groove flows out through the outlet cavity opening and contacts the motor copper bar to cool the motor copper bar.

6. The copper oil drain cooling structure of claim 1, wherein the end cap cooling channel includes a first total channel and three sub-channels, the three sub-channels being in communication with three of the cooling cavities, respectively.

7. The copper oil cooling structure according to claim 6, wherein the end cover cooling passage includes a second total passage and three oil injection passages, the three oil injection passages respectively facing three phases of the motor copper bar;

the second total channel is communicated with the first total channel, and cooling oil in the motor cooling channel is sprayed to the motor copper bar through the first total channel, the second total channel and the oil injection channel.

8. The copper oil-cooling structure according to claim 7, wherein a communication hole is provided in the cooling groove of the insulating base, the communication hole corresponding to the second total passage so as to communicate the second total passage with the cooling chamber.

9. An electric drive system comprising a copper oil extraction structure as claimed in any one of claims 1 to 8.

10. A vehicle comprising an electric drive system according to claim 9.