Integrated electronic device, electric vehicle driving system and vehicle

Abstract

The invention relates to an integrated electronic device for an electric vehicle driving system, the electric vehicle driving system and a vehicle. The integrated electronic device comprises: a first housing in which a first electrical component is disposed; the second shell is internally provided with a second electrical component; and the cover is arranged on the second shell so as to seal the second shell. The second shell is arranged on the first shell to seal the first shell, the integrated electronic device further comprises an electric connecting piece, and the electric connecting piece extends from the interior of the first shell to the interior of the second shell to electrically connect the first electric component to the second electric component.

Description

Technical Field

[0001] The present disclosure relates to an integrated electronic device for an electric vehicle driving system, an electric vehicle driving system, and a vehicle. Background Art

[0002] With the country's promotion of energy conservation and emission reduction and the demand for controlling air pollution, the electric vehicle market is growing rapidly, and electric vehicles will become the mainstream products in the future automobile market. The electric vehicle drive system is an important part of the electric vehicle. The on-board charger (OBC), voltage converter, inverter, power distribution unit (PDU), high-voltage DC power supply (HCDC), fuse, relay, electric heater (PTC), fast charger, compressor controller, etc. are important components of the electric vehicle drive system.

[0003] The functions of the above components are different. For example, the on-board charger converts high-voltage AC into high-voltage DC, the voltage converter converts high-voltage DC into low-voltage DC, the inverter converts high-voltage DC into three-phase AC, and the power distributor is a high-voltage component that provides charge and discharge control, high-voltage component electrical control, etc. In addition, the failure rates of the above components are different.

[0004] Generally speaking, the above components, especially the on-board charger, voltage converter, and power distributor need to be separated from each other and set in separate modules, which leads to a complex structure, large volume, and heavy weight of the drive system. Therefore, there is an urgent need for an integrated electronic device with high integration, small volume, light weight, and simple and convenient assembly, disassembly, and maintenance. Summary of the invention

[0005] Therefore, an object of the present disclosure is to provide an integrated electronic device for an electric vehicle drive system, an electric vehicle drive system and a vehicle, wherein the integrated electronic device achieves high integration, is small in size, light in weight, and is simple and convenient to assemble, disassemble and maintain.

[0006] The above objects are achieved by the integrated electronic device for an electric vehicle drive system, the electric vehicle drive system and the vehicle described below.

[0007] The present disclosure relates to an integrated electronic device for an electric vehicle drive system, the integrated electronic device comprising: a first housing, in which a first electrical component is disposed; a second housing, in which a second electrical component is disposed; and a cover, disposed on the second housing to close the second housing. The second housing is disposed on the first housing to close the first housing, and the integrated electronic device further comprises an electrical connector, the electrical connector extending from the inside of the first housing to the inside of the second housing to electrically connect the first electrical component to the second electrical component.

[0008] In one embodiment, the first electrical component includes a motor controller, and the second electrical component includes a voltage converter, an on-board charger, and a power distributor.

[0009] In one embodiment, the second housing is superposed on the first housing such that a bottom wall of the second housing closes the first housing, and the electrical connector extends through the bottom wall of the second housing.

[0010] In one embodiment, the electrical connector is selected from the group consisting of: a busbar, a cable, and a wiring harness.

[0011] In one embodiment, at least one first circuit board supporting the first electrical component is disposed in the first shell, at least one second circuit board supporting the second electrical component is disposed in the second shell, and the electrical connector electrically connects the first circuit board and the second circuit board.

[0012] In one embodiment, a transverse flange extending outward is provided on the top of the first shell, and the transverse flange is fixedly connected to the bottom wall of the second shell.

[0013] In one embodiment, the integrated electronic device further includes a sealing ring, and a groove for the sealing ring is provided on a side of the bottom wall of the second housing facing the first housing.

[0014] In one embodiment, a first supporting column for supporting the first circuit board is disposed on the bottom wall of the first shell, and a second supporting column for supporting the second circuit board is disposed on the bottom wall of the second shell.

[0015] In one embodiment, the second shell includes a first chamber and a second chamber, wherein the voltage converter and the vehicle charger are disposed in the first chamber, the power distributor is disposed in the second chamber, and the cover includes a first cover and a second cover corresponding to the first chamber and the second chamber, respectively.

[0016] In one embodiment, cooling channels are respectively disposed on the first shell and the second shell, and the respective cooling channels are in fluid communication with each other.

[0017] The present disclosure also relates to an electric vehicle driving system, which includes the integrated electronic device as described above.

[0018] The present disclosure also relates to a vehicle, which includes the electric vehicle driving system as described above.

[0019] The technical solution disclosed in the present invention integrates a motor controller, a voltage converter, an on-board charger and a power distributor, thereby improving the integration of the entire device, reducing the size and weight of the device, and making the device structure simpler. At the same time, it makes the assembly, disassembly and maintenance of the drive system simple and convenient, the system cost is low, and transportation is easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The advantages and purposes of the present disclosure can be better understood from the preferred embodiments of the present disclosure described in detail below in conjunction with the accompanying drawings. In order to better show the relationship between the various components in the accompanying drawings, the accompanying drawings are not drawn to scale. In the accompanying drawings:

[0021] Figure 1 A schematic diagram showing an integrated electronic device for an electric vehicle driving system according to an embodiment of the present disclosure is shown;

[0022] Figure 2 A partial schematic diagram of an integrated electronic device for an electric vehicle driving system according to an embodiment of the present disclosure is shown, wherein a first electrical component in a first housing is shown;

[0023] Figure 3 A highly schematic cross-sectional view showing an integrated electronic device for an electric vehicle drive system according to one embodiment of the present disclosure; and

[0024] Figure 4 A top view of an integrated electronic device for an electric vehicle driving system after a cover is removed according to one embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in combination with the drawings of the specific embodiments of the present disclosure. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0026] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include", "comprise" or "have" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to the physical or mechanical connections or connections shown in the drawings, but may include connections or connections equivalent thereto, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] Below, see Figures 1 to 4 Embodiments of the present disclosure are described in detail.

[0028] like Figure 1 As shown, the integrated electronic device included in the electric vehicle drive system according to the present disclosure may include a first housing 1, a second housing 2 and a cover 3. The electric vehicle drive system may also include a motor assembly and a reducer assembly, and the motor assembly and the reducer assembly may be arranged in a single housing, or may be arranged in different housings respectively and the different housings may be integrated together. The integrated electronic device may be detachably connected to a single motor-reducer housing, or may be detachably connected to a motor housing, a reducer housing or an integrated motor-reducer housing. For example, the first housing 1 is detachably connected to a single motor-reducer housing. The first housing 1 and the second housing 2 are independent of each other and are superimposed on the top of the single motor-reducer housing. The first housing 1 and the second housing 2 are independent of each other, which means that the two can be separated from each other. Of course, the first housing 1 and the second housing 2 may also be arranged side by side on the top of the single motor-reducer housing. The first housing 1 and the second housing 2 may be arranged transversely to the direction in which the motor shaft extends, or may be arranged along the direction in which the motor shaft extends.

[0029] like Figure 2 As shown, a first electrical component 6 is disposed in the first housing 1. Figure 4 As shown, a second electrical component 7 is disposed in the second housing 2. Figure 1 and 3 As shown, the second shell 2 is arranged on the first shell 1 to close the first shell 1, and the cover 3 is arranged on the second shell 2 to close the second shell 2. Figure 3As shown, the integrated electronic device further includes an electrical connector 4, which extends from the inside of the first housing 1 to the inside of the second housing 2 to electrically connect the first electrical component 6 to the second electrical component 7. For example, the second housing 2 is stacked on the first housing 1 so that the bottom wall 5 of the second housing 2 closes the first housing 1, and the electrical connector 4 extends through the bottom wall 5 of the second housing 2, as shown in FIG. Figure 3 shown.

[0030] As can be seen from the above, the cover of the first shell 1 of the integrated electronic device of the present disclosure is omitted, and it is closed by the second shell 2 (such as the bottom wall 5 of the second shell 2), so the whole device is more integrated, smaller in size and lighter in weight.

[0031] For example, the first electrical component 6 includes a motor controller. The second electrical component 7 includes a voltage converter (for example, a DCDC converter), an on-board charger, and a power distributor. In addition, the second electrical component 7 may also include a high-voltage direct current power supply (HVDC), a fuse, a relay, an electric heater (PTC), a fast charger, a compressor controller, and the like. The motor controller is, for example, an inverter, which is used to convert the direct current stored in the power battery into variable-frequency and variable-voltage alternating current to control the speed and torque of the motor. The inverter of the electric vehicle adjusts the amplitude and frequency of the alternating current, the frequency controls the speed of the electric vehicle, and the amplitude controls the power of the electric vehicle. The DCDC converter can convert the DC power supply voltage into any low-voltage DC voltage to provide the required power for the power steering system, the air conditioner in the vehicle, and other auxiliary equipment. The DCDC converter receives input from the power battery and supplies power to the on-board electrical appliances. The on-board charger (OBC) is an electric energy conversion device used to control and adjust the charging of the power battery on the electric vehicle. The grid voltage is input into the on-board charger via the ground AC charging pile and the AC charging port, and then the power battery is charged. The power distributor or high-voltage power distributor (Power Distribution Unit, PDU) is connected to the electric vehicle's power battery, motor controller, inverter, etc., and provides functions such as charge and discharge control, power-on control of high-voltage components, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control for the electric vehicle's high-voltage system, protecting and monitoring the operation of the high-voltage system. The electric heater (Positive Temperature Coefficient, PTC) is a thermistor that generates heat when powered to heat the air flowing through it, thereby providing adjustable warm air and glass defogger and defrost functions.

[0032] By separately arranging the DCDC converter and the on-board charger in an independent second housing located on top of the first housing, when the DCDC converter and the on-board charger described above fail, the failed DCDC converter and the on-board charger can be removed from the drive system for repair or replacement, thereby making it easier to assemble, disassemble and repair the drive system, thereby reducing costs and making transportation easier. Specifically, only the cover 3 can be removed for repair or maintenance. Alternatively, when a single functional unit is damaged, only the corresponding housing or cavity assembly needs to be replaced, without replacing the entire integrated product or all-in-one product.

[0033] For example, the electrical connector 4 is a bus bar, and the bus bar extends upward from the first shell 1 through the bottom wall 5 of the second shell 2 into the second shell 2. The use of a bus bar in the present disclosure can reduce the use of cables in the device, further reduce the volume, improve the integration, and reduce the design and maintenance costs. Of course, in other examples, the electrical connector 4 can also be a cable, a wiring harness, etc., depending on the specific application environment. For example, the side wall of the first shell 1 and the side wall of the second shell 2 can be respectively provided with connection holes, and the first electrical component is electrically connected to the second electrical component through a wiring harness or cable passing through the connection hole. Alternatively, the side wall of the first shell 1 and the side wall of the second shell 2 can be respectively provided with electrical interfaces, and the electrical interfaces are electrically connected by a wiring harness or a cable.

[0034] like Figure 2 and 3 As shown, at least one first circuit board 13 supporting the first electrical component 6 is disposed in the first housing 1 . Figure 2 Only one first circuit board 13 is shown in the figure, but of course, multiple independent first circuit boards 13 (not shown) can also be provided, on which various electrical components are provided. Figure 3 and 4 As shown, at least one second circuit board 14 supporting the second electrical component 7 is disposed in the second housing 2, and the number of the second circuit boards 14 may be one or more. Figure 3 and 4 Although not shown in the figure, a second circuit board 14 on which a voltage converter and an on-board charger are arranged and another second circuit board 14 on which a power distributor is arranged are arranged in the second housing 2. The electrical connector 4 or busbar electrically connects the first circuit board 13 and the second circuit board 14.

[0035] See again Figure 2 and 3 The top of the first shell 1 is provided with a transverse flange 15 extending outward, and the transverse flange 15 is fixedly connected to the bottom wall 5 of the second shell 2. Figure 1 and 3 As shown, the bottom wall 5 of the second housing 2 extends outwards by a certain distance relative to the side wall of the second housing 2. Figure 2 As shown, a plurality of first holes 16 are provided on the transverse flange 15, and second holes are correspondingly provided on the bottom wall 5 of the second housing 2. Screws or bolts pass through the first holes and the second holes to fix the transverse flange 15 to the bottom wall 5 of the second housing 2. Of course, other connection methods are also feasible.

[0036] like Figure 3 As shown, the integrated electronic device further includes a sealing ring 10, and a groove for the sealing ring 10 is provided on the side of the bottom wall 5 of the second housing 2 facing the first housing 1. The sealing ring 10 may be a rubber ring and may be provided on the inner side relative to the screw or bolt. After the first housing 1, the second housing 2 and the cover 3 are assembled together, a sealed environment may be achieved.

[0037] like Figure 2 and 3 As shown, a first support column 8 for supporting the first circuit board 13 is provided on the bottom wall of the first housing 1. The first support column 8 can be integrally formed with the first housing 1, or can be fixed to the bottom wall of the first housing 1 in other ways. Figure 3 As shown, the bottom wall 5 of the second housing 2 is provided with a second support column 9 for supporting the second circuit board 14. Similarly, the second support column 9 can be integrally formed with the second housing 2, or can be fixed to the bottom wall of the second housing 2 in other ways.

[0038] like Figure 4 As shown, the second housing 2 includes a first chamber 11 and a second chamber 12, with a partition wall disposed therebetween for simply separating the first chamber 11 from the second chamber 12, rather than completely isolating them. A voltage converter and a vehicle charger may be disposed in the first chamber 11, and a power distributor may be disposed in the second chamber 12. Figure 1 As shown, the cover 3 includes a first cover 31 and a second cover 32 corresponding to the first chamber 11 and the second chamber 12, respectively. In this way, the voltage converter and the on-board charger can be repaired and maintained separately from the power distributor. For example, when the power distributor needs to be repaired, only the second cover 32 needs to be opened.

[0039] In order to achieve effective heat dissipation of various electrical components in the integrated electronic device of the drive system, cooling channels 17 and 18 are respectively provided on the first housing 1 and the second housing 2, and the respective cooling channels are fluidically connected to each other. Figure 2 As shown, a cooling channel 17 is provided on the first housing 1, and the position through which the cooling channel 17 flows corresponds to the position of the first electrical component 6. For example, part of the cooling channel 17 can be located on the bottom wall of the first housing 1. Figure 4As shown, a cooling channel 18 is provided on the second housing 2, and the position through which it flows corresponds to the position of the second electrical component 7, in particular, the position of the voltage converter and the on-board charger. For example, part of the cooling channel 18 may be located near the side wall or bottom wall of the second housing 2 or the circuit board. It should be understood that the parts indicated by the reference numerals 17 and 18 in the drawings may specifically represent a part of the cooling channel, such as the inlet of the cooling channel and the outlet of the cooling channel, and the specific setting positions of the other parts of the above cooling channels may be set according to the cooling requirements, and the present disclosure does not limit them. The cooling channels 17 and 18 may be connected to the cooling channels of the motor-reducer assembly of the electric vehicle drive system. The cooling fluid circulating in the cooling channel may be a single cooling medium, such as water or oil, and the water or oil may come from the cooling fluid of the motor-reducer assembly. Through the effective heat dissipation of the above-mentioned arrangement, the life of the integrated electronic device of the present disclosure can be improved, and the volume and weight can be further reduced through the cooling channel integrated on the housing.

[0040] The electric vehicle drive system provided by the present disclosure includes the integrated electronic device and the motor-reducer assembly as described above. It should be understood that the electric vehicle drive system of the present disclosure also has the advantages described above with respect to the integrated electronic device, namely, high integration, small size, light weight, and simple and convenient assembly, disassembly and maintenance, low cost, and easy transportation.

[0041] The vehicle provided by the present disclosure includes an electric vehicle drive system as described above. The vehicle can be an electrified vehicle (Electrified Vehicle), such as a pure electric vehicle (BEV, Battery Electric Vehicle), a hybrid electric vehicle (HEV, Hybrid Electric Vehicle), a plug-in hybrid electric vehicle (PHEV, Plug-in Hybrid Electric Vehicle), and an extended-range electric vehicle (REEV, Range Extended Electrified Vehicle). The vehicle can also be a hydrogen energy vehicle. It should be understood that the vehicle of the present disclosure also has the advantages described above with respect to the integrated electronic device and the electric vehicle drive system.

[0042] In addition, the technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of disclosure to achieve the purpose of this disclosure.

Claims

1. An integrated electronic device for an electric vehicle drive system, characterized in that: The integrated electronic device comprises: A first housing (1) in which a first electrical component (6) is disposed; a second housing (2) in which a second electrical component (7) is disposed; and a cover (3) disposed on the second shell (2) to close the second shell (2); The second shell (2) is arranged on the first shell (1) to close the first shell (1), and the integrated electronic device also includes an electrical connector (4), which extends from the inside of the first shell (1) to the inside of the second shell (2) to electrically connect the first electrical component (6) to the second electrical component (7).

2. The integrated electronic device according to claim 1, characterized in that: The first electrical component (6) includes a motor controller, and the second electrical component (7) includes a voltage converter, an on-board charger and a power distributor.

3. The integrated electronic device according to claim 1, characterized in that: The second shell (2) is superimposed on the first shell (1) so that the bottom wall (5) of the second shell (2) closes the first shell, and the electrical connection member (4) extends through the bottom wall (5) of the second shell (2).

4. The integrated electronic device according to claim 3, characterized in that: The electrical connection (4) is selected from the group consisting of: a busbar, a cable, and a wiring harness.

5. The integrated electronic device according to claim 3, characterized in that: At least one first circuit board (13) supporting the first electrical component (6) is arranged in the first housing (1), at least one second circuit board (14) supporting the second electrical component (7) is arranged in the second housing (2), and the electrical connector (4) electrically connects the first circuit board and the second circuit board.

6. The integrated electronic device according to claim 3, characterized in that: A transverse flange (15) extending outward is provided on the top of the first shell (1), and the transverse flange is fixedly connected to the bottom wall (5) of the second shell (2).

7. The integrated electronic device according to claim 3, characterized in that: The integrated electronic device further comprises a sealing ring (10), and a groove for the sealing ring is provided on the side of the bottom wall (5) of the second housing (2) facing the first housing (1).

8. The integrated electronic device according to claim 3, characterized in that: A first supporting column (8) for supporting the first circuit board (13) is arranged on the bottom wall of the first shell (1), and a second supporting column (9) for supporting the second circuit board (14) is arranged on the bottom wall (5) of the second shell (2).

9. The integrated electronic device according to claim 2, characterized in that: The second shell (2) comprises a first chamber (11) and a second chamber (12), wherein the voltage converter and the vehicle charger are arranged in the first chamber, and the power distributor is arranged in the second chamber, and the cover (3) comprises a first cover (31) and a second cover (32) corresponding to the first chamber (11) and the second chamber (12) respectively.

10. The integrated electronic device according to claim 1, characterized in that: The first shell and the second shell are respectively provided with cooling channels, and the respective cooling channels are in fluid communication with each other.

11. An electric vehicle driving system, characterized in that: The electric vehicle driving system comprises the integrated electronic device according to any one of claims 1 to 10.

12. A vehicle, characterized in that: The vehicle includes the electric vehicle drive system as claimed in claim 11.

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