Electric driving assembly heat dissipation system, electric driving assembly, and vehicle

Abstract

A vehicle, comprising an electric driving assembly. The electric driving assembly comprises an electric driving assembly heat dissipation system; the electric driving assembly heat dissipation system comprises a first heat source, a first power device, a second power device, a main cooling flow path, and at least two branch cooling flow paths connected in parallel; the main cooling flow path is communicated with each branch cooling flow path; some or all of the first heat source, the first power device and the second power device are arranged in the branch cooling flow paths or the main cooling flow path, so as to balance the heat dissipation area of the cooling flow paths and the flow speed of a cooling medium.

Description

An electric drive assembly heat dissipation system, an electric drive assembly and a vehicle

[0001] Cross-reference to Related Applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202410653290.3, filed on May 22, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure belongs to the technical field of heat dissipation, and in particular, the present disclosure relates to an electric drive assembly heat dissipation system, an electric drive assembly and a vehicle. BACKGROUND

[0004] During operation, a vehicle generally has a cooling flow channel arranged on an electric drive assembly for dissipating heat from multiple integrated components.

[0005] The arrangement of the cooling flow channel greatly affects the heat dissipation efficiency. If the flow rate of the cooling flow channel is too fast, the heat dissipation will not be uniform, and if the flow rate of the cooling flow channel is too slow, the heat dissipation efficiency will be affected. Therefore, how to better arrange the cooling flow channel has become a technical problem to be solved by those skilled in the art.

[0006] SUMMARY

[0007] The present disclosure provides an electric drive assembly heat dissipation system, an electric drive assembly and a vehicle.

[0008] The present disclosure provides an electric drive assembly heat dissipation system, comprising: a first heat source, a first power device, a second power device, a cooling flow path trunk and at least two parallel cooling flow path branches; the cooling flow path trunk is in communication with each of the cooling flow path branches, and part or all of the first heat source, the first power device and the second power device are arranged in the cooling flow path branches and / or the cooling flow path trunk to balance the heat dissipation area of the cooling flow path and the flow rate of the cooling medium in the cooling flow path.

[0009] In some embodiments, when the first heat source is arranged in the cooling flow path trunk, the first power device and the second power device are arranged on different cooling flow path branches, respectively; when the first heat source is arranged in one of the cooling flow path branches, the first power device and the second power device are arranged on different cooling flow path branches, respectively, and one of the power devices and the first heat source are arranged on the same cooling flow path branch, or the first power device and the second power device are arranged on another cooling flow path branch simultaneously.

[0010] In some embodiments, the first heat source and the first power device or the second power device are arranged on the same cooling flow path branch, and the first power device or the second power device is located on the side of the first heat source close to the outlet of the cooling flow path branch along the flow direction of the cooling medium.

[0011] In some embodiments, the electric drive assembly cooling system further comprises a motor controller arranged on the cooling flow path main branch or any of the cooling flow path branches.

[0012] In some embodiments, the motor controller and the first power device or the second power device are arranged on the same cooling flow path branch, and the first power device or the second power device is located on the side of the motor controller close to the outlet of the cooling flow path branch along the flow direction of the cooling medium.

[0013] In some embodiments, the electric drive assembly cooling system further comprises a second heat source arranged on the cooling flow path main branch or any of the cooling flow path branches.

[0014] In some embodiments, the electric drive assembly cooling system further comprises a third heat source arranged on the cooling flow path main branch or any of the cooling flow path branches.

[0015] In some embodiments, the electric drive assembly cooling system further comprises a fourth heat source arranged on the cooling flow path main branch or any of the cooling flow path branches.

[0016] In some embodiments, the fourth heat source and the first heat source are arranged on the same cooling flow path branch, and the fourth heat source is located on the side of the first heat source close to the inlet of the cooling flow path branch along the flow direction of the cooling medium.

[0017] In some embodiments, the electric drive assembly cooling system further comprises a fifth heat source arranged on the cooling flow path main branch or any of the cooling flow path branches.

[0018] In some embodiments, the first heat source comprises a first capacitor arranged on the cooling flow path main branch or any of the cooling flow path branches.

[0019] In some embodiments, the first heat source further comprises a third power device, wherein one of the cooling flow path branches comprises at least two cooling flow path sub-branches arranged in parallel, and the third power device and the first capacitor are arranged on different cooling flow path sub-branches, respectively.

[0020] In some embodiments, each of the cooling flow path branches comprises at least two cooling flow path sub-branches arranged in parallel, and the first power device and the second power device are arranged on different cooling flow path sub-branches, respectively.

[0021] In some embodiments, the electric drive assembly cooling system further comprises a first driving device, an outlet of the first driving device being in communication with an inlet of the cooling flow path main branch, and the first driving device being configured to drive the cooling medium to flow.

[0022] In some embodiments, the electric drive assembly cooling system further comprises a heat exchanger, a first inlet of the heat exchanger being in communication with an outlet of the cooling flow path main branch, and a first outlet of the heat exchanger being in communication with an inlet of the first driving device.

[0023] In some embodiments, the electric drive assembly cooling system further comprises an electric machine and a second driving device, an outlet of the second driving device being in communication with a second inlet of the heat exchanger, and an inlet of the second driving device being in communication with a second outlet of the heat exchanger, and the electric machine being arranged on the cooling flow path between the outlet of the second driving device and the second inlet of the heat exchanger.

[0024] The electric drive assembly provided by the embodiments of the present disclosure comprises the electric drive assembly cooling system provided by any one of the above embodiments.

[0025] The vehicle provided by the embodiments of the present disclosure comprises the electric drive assembly provided by any one of the above embodiments.

[0026] By improving the arrangement of the cooling flow path, the cooling flow path in series and in parallel is adopted to cool each integrated component on the electric drive assembly, which solves the problem of uneven heat dissipation caused by small heat exchange area and too fast flow rate when the cooling flow path is used in series, and solves the problem of too low flow rate when the cooling flow path is used in parallel, so as to balance the heat exchange area and the flow rate of the cooling medium, reduce the accumulation of heat in the cooling medium, and improve the heat dissipation efficiency. Compared with the cooling flow path in complete parallel, appropriate series connection can reduce the volume of the cooling flow path structure, which is conducive to the miniaturization design of the electric drive assembly, so as to improve the space utilization rate. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced.

[0028] FIG. 1 is a cooling flow path schematic diagram of an electric drive assembly cooling system provided by the embodiments of the present disclosure;

[0029] FIG. 2 is a cooling flow path schematic diagram of another electric drive assembly cooling system provided by the embodiments of the present disclosure;

[0030] Fig. 3 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0031] Fig. 4 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0032] Fig. 5 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0033] Fig. 6 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0034] Fig. 7 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0035] Fig. 8 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0036] Fig. 9 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0037] Fig. 10 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0038] Fig. 11 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0039] Fig. 12 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0040] Fig. 13 is a schematic diagram of a cooling flow path of another heat dissipation system of an electric drive assembly according to an embodiment of the present disclosure;

[0041] Fig. 14 is a schematic diagram of a cooling flow path of a power device according to an embodiment of the present disclosure;

[0042] Fig. 15 is a schematic diagram of a cooling flow path of another power device according to an embodiment of the present disclosure.

[0043] BRIEF DESCRIPTION OF DRAWINGS 1, on-board charger; 2, first power device; 3, second power device; 4, motor controller; 5, contactor; 6, inductor; 7, power distribution device; 8, copper bar; 9, first capacitor; 10, third power device; 11, first drive; 12, heat exchanger; 13, motor; 14, second drive. DETAILED DESCRIPTION

[0044] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be thoroughly understood, and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0045] With the development of new energy vehicles, pure electric household vehicles have become more and more popular. In order to reduce development cost and improve space utilization, components such as on-board charger, converter, motor controller, motor, contactor, power distribution device, etc. are integrated together to form an electric drive assembly.

[0046] During the operation of the vehicle, the motor, motor controller and on-board charger and other components will generate heat. If not cooled in time, it will affect the normal operation of the electric drive assembly. Therefore, a cooling flow channel for cooling the integrated components is generally provided on the electric drive assembly.

[0047] Referring to FIGS. 1-4, the present disclosure provides an electric drive assembly cooling system 100, comprising a first heat source, a first power device 2, a second power device 3, a cooling flow path trunk and at least two parallel cooling flow path branches, the cooling flow path trunk being in communication with each of the cooling flow path branches; part or all of the first heat source, the first power device 2 and the second power device 3 are arranged in the cooling flow path branches and / or the cooling flow path trunk to balance the heat dissipation area of the electric drive assembly cooling system 100 and the flow rate of the cooling medium in the cooling flow path.

[0048] Wherein, each integrated component of the electric drive assembly can be arranged on the electric drive assembly housing, and a cooling flow channel for the cooling medium to flow is arranged on the housing to form a series and parallel cooling flow path in the electric drive assembly cooling system 100. The number of cooling flow path branches can be two, three or four, and the specific number can be flexibly arranged according to the number of components to be cooled, and the present application does not limit it. In order to clearly and specifically disclose the embodiments of the present disclosure, hereinafter two cooling flow path branches are taken as an example. The first heat source is the heat generating component of the motor controller in the electric drive assembly, including but not limited to on-board charger, vehicle controller, domain controller, converter, contactor, inductor, capacitor, power distribution device or copper bar, and the first heat source of the present embodiment is preferably an on-board charger 1.

[0049] In the embodiment shown in FIG. 1, the first heat source is arranged in the cooling flow path trunk, and the first power device 2 and the second power device 3 are arranged in a cooling flow path branch, respectively. In the embodiments shown in FIG. 2 and FIG. 3, the first heat source and one of the first power device 2 and the second power device 3 are arranged in a cooling flow path branch, and the other of the first power device 2 and the second power device 3 is arranged in another cooling flow path branch. In the embodiment shown in FIG. 4, the first heat source is arranged in a cooling flow path branch, and the first power device 2 and the second power device 3 are arranged in another cooling flow path branch.

[0050] The electric drive assembly heat dissipation system 100 improves the arrangement of the cooling flow path, and uses a cooling flow path in series and in parallel to respectively dissipate heat from each integrated component on the electric drive assembly. Compared with a mode of using only series heat dissipation, the flow channel area of the cooling flow path can be increased, the heat dissipation area between the cooling flow path and each component can be increased, and the flow speed in the flow channel is not too fast to cause uneven heat dissipation. Compared with a mode of using only parallel heat dissipation, too many parallel branches can reduce the pressure in the flow path, that is, the flow speed of the cooling medium in the flow path is increased, so that the heat dissipation area and the flow speed of the cooling medium can be balanced, the heat accumulation in the cooling medium is reduced, and the heat dissipation efficiency is improved. Compared with a completely parallel cooling flow path, appropriate series connection can reduce the volume of the cooling flow path structure, which is conducive to the miniaturization design of the electric drive assembly, improves the space utilization rate, and reduces the processing cost.

[0051] In some embodiments, when the first heat source is arranged in the cooling flow path trunk, the first power device 2 and the second power device 3 are arranged on different cooling flow path branches, respectively. When the first heat source is arranged in one of the cooling flow path branches, the first power device 2 and the second power device 3 are arranged on different cooling flow path branches, respectively, and one of the power devices and the first heat source are arranged on the same cooling flow path branch, or the first power device 2 and the second power device 3 are arranged on another cooling flow path branch at the same time.

[0052] FIG. 1 specifically shows a cooling flow path schematic diagram of an electric drive assembly heat dissipation system 100, in which the first heat source, i.e., the on-board charger 1, is arranged in the cooling flow path trunk, and the first power device 2 and the second power device 3 are arranged on different cooling flow path branches, respectively. A cooling circuit is formed between the water pump and the oil cooler, and water is used as the cooling medium. The cooling effect of water cooling is good, and the cooling temperature is uniform. Another cooling circuit is formed between the oil pump and the oil cooler, and cooling oil is used as the cooling medium. The oil medium has good insulation and is not magnetically conductive, and has the advantages of low freezing point and high boiling point.

[0053] When the electric drive assembly cooling system 100 is working, water is output by the water pump, flows along the cooling flow path main path and carries away the heat in the area of the on-board charger 1, then enters two cooling flow path branches respectively, exchanges heat with the power devices on each cooling flow path branch, then converges to the cooling flow path main path and enters the oil cooler to exchange heat with the cooling oil, and finally returns to the water pump and is cooled by the condenser in the water pump before re-entering the cooling flow path main path. The cooling oil is output by the oil pump, then passes through the area of the motor 13 and carries away the heat, then enters the oil cooler to exchange heat with the water, and finally returns to the oil pump.

[0054] Fig. 2 specifically shows a cooling flow path schematic diagram of another electric drive assembly cooling system 100, in which the first heat source, i.e. the on-board charger 1, is arranged on one cooling flow path branch, the first power device 2 and the second power device 3 are arranged on different cooling flow path branches respectively, and the first power device 2 is located on the same cooling flow path branch as the on-board charger 1. A cooling loop is formed between the water pump and the oil cooler, and water is used as the cooling medium. Another cooling loop is formed between the oil pump and the oil cooler, and cooling oil is used as the cooling medium.

[0055] When the electric drive assembly cooling system 100 is working, water is output by the water pump, flows along the cooling flow path main path, then flows along two cooling flow path branches, exchanges heat with the on-board charger 1 and the first power device 2 on the first cooling flow path branch in sequence, exchanges heat with the second power device 3 on the second cooling flow path branch, then converges to the cooling flow path main path and enters the oil cooler to exchange heat with the cooling oil, and finally returns to the water pump and is cooled by the condenser in the water pump before re-entering the cooling flow path main path. The cooling oil is output by the oil pump, then passes through the area of the motor 13 and carries away the heat, then enters the oil cooler to exchange heat with the water, and finally returns to the oil pump.

[0056] Fig. 3 specifically shows a cooling flow path schematic diagram of another electric drive assembly cooling system 100, in which the first heat source, i.e. the on-board charger 1, is arranged on one cooling flow path branch, the first power device 2 and the second power device 3 are arranged on different cooling flow path branches respectively, and the second power device 3 is located on the same cooling flow path branch as the on-board charger 1. The scheme shown in Fig. 3 is similar to that in Fig. 2, and the working principle thereof will not be described here.

[0057] Fig. 4 specifically shows a cooling flow path schematic diagram of another electric drive assembly cooling system 100, in which the on-board charger 1 is arranged on one cooling flow path branch, and the first power device 2 and the second power device 3 are arranged on another cooling flow path branch. A cooling loop is formed between the water pump and the oil cooler, and water is used as the cooling medium. Another cooling loop is formed between the oil pump and the oil cooler, and cooling oil is used as the cooling medium.

[0058] When the electric drive assembly cooling system 100 is working, water is output by the water pump, first flows along the cooling flow path main path, then flows along two cooling flow path branch paths, exchanges heat with the on-board charger 1 on the first cooling flow path branch path, exchanges heat with the first power device 2 and the second power device 3 on the second cooling flow path branch path in sequence, then converges to the cooling flow path main path and enters the oil cooler to exchange heat with the cooling oil, and finally returns to the water pump and is cooled by the condenser in the water pump before re-entering the cooling flow path main path. The cooling oil is output by the oil pump, then passes through the motor 13 area and carries away heat, and then enters the oil cooler to exchange heat with the water, and then returns to the oil pump.

[0059] The electric drive assembly cooling system 100 adopts a cooling flow path combining series and parallel connection between the water pump and the oil cooler to cool each integrated component on the electric drive assembly, so as to balance the heat dissipation area and the flow rate of the cooling medium, reduce the accumulation of heat in the cooling medium, and improve the heat dissipation efficiency. Compared with a completely parallel cooling flow path, appropriate series connection can reduce the volume of the cooling flow path structure, which is conducive to the miniaturization design of the electric drive assembly, improves the space utilization rate, and reduces the processing cost.

[0060] In some embodiments, referring to FIGS. 2 and 3, the first heat source and the first power device 2 or the second power device 3 are arranged on the same cooling flow path branch path, and the first power device 2 or the second power device 3 is located on the side of the first heat source close to the outlet of the cooling flow path branch path along the flow direction of the cooling medium.

[0061] The power device is a component with a high heat generation in the electric drive assembly. If the cooling medium first flows through the power device, the temperature of the cooling medium will be too high, which is not conducive to the heat dissipation of the on-board charger 1. Therefore, along the flow direction of the cooling medium, the first heat source, i.e., the on-board charger 1, can be arranged before the first power device 2 or the second power device 3, i.e., the first power device 2 or the second power device 3 is located on the side of the on-board charger 1 closer to the outlet of the cooling flow path branch path, so as to improve the heat dissipation efficiency of the electric drive assembly.

[0062] In some embodiments, referring to FIG. 5, the electric drive assembly cooling system 100 further comprises a motor controller 4 arranged on the cooling flow path main path or any of the cooling flow path branch paths.

[0063] The motor controller 4 also generates heat during operation, and therefore the motor controller 4 can also be included in the electric drive assembly cooling system 100.

[0064] In some embodiments, the motor controller 4 and the on-board charger 1 can be located on the same cooling flow path branch, and the motor controller 4 and the on-board charger 1 can be arranged in any order along the flow direction of the cooling medium. As shown in FIG. 5, the motor controller 4 can be located after the on-board charger 1.

[0065] In some embodiments, the motor controller 4 can also be arranged on the cooling flow path main path, so that compared with being arranged on the cooling flow path branch, the flow rate of the cooling medium can be increased, and the heat dissipation efficiency of the motor controller 4 can be correspondingly improved.

[0066] In some embodiments, referring to FIG. 6, the motor controller 4 and the first power device 2 or the second power device 3 are arranged on the same cooling flow path branch, and the first power device 2 or the second power device 3 is located on the side of the motor controller 4 close to the outlet of the cooling flow path branch along the flow direction of the cooling medium.

[0067] The motor controller 4 and the second power device 3 are located on the same cooling flow path branch. Since the power device is a component with a relatively high heat generation in the electric drive assembly, if the cooling medium first flows through the power device, the temperature of the cooling medium will be too high, which is not conducive to the heat dissipation of the motor controller 4. Therefore, along the flow direction of the cooling medium, the motor controller 4 can be arranged before the second power device 3. Similarly, when the motor controller 4 is located on the cooling flow path main path, the motor controller 4 can also be arranged before any one of the power devices, so as to improve the heat dissipation efficiency.

[0068] In some embodiments, the motor controller 4 and the first power device 2 can also be located on the same cooling flow path branch. Since the power device is a component with a relatively high heat generation in the electric drive assembly, if the cooling medium first flows through the power device, the temperature of the cooling medium will be too high, which is not conducive to the heat dissipation of the motor controller 4. Therefore, along the flow direction of the cooling medium, the motor controller 4 can be arranged before the first power device 2.

[0069] In some embodiments, referring to FIG. 7, the heat dissipation system 100 of the electric drive assembly further comprises a second heat source arranged on the cooling flow path main path or any one of the cooling flow path branches.

[0070] The second heat source includes but is not limited to an on-board charger, a vehicle controller, a domain controller, a converter, a contactor, an inductor, a capacitor, a power distribution device, or a copper bar. The second heat source of the embodiment preferably adopts a contactor 5. The contactor 5 also generates heat when current passes through, and therefore, the contactor 5 can also be included in the heat dissipation system 100 of the electric drive assembly. The position of the contactor 5 can be flexibly selected, and the contactor 5 can be arranged on the cooling flow path main path or the cooling flow path branch. The embodiments of the present application do not limit the position of the contactor 5.

[0071] Figure 7 specifically shows another cooling flow schematic diagram of the electric drive assembly cooling system 100, wherein the on-board charger 1 and the contactor 5 are arranged in sequence on the cooling flow main path, and the first power device 2 and the second power device 3 are arranged on two cooling flow branch paths respectively. A cooling loop is formed between the water pump and the oil cooler, and water is used as the cooling medium. Another cooling loop is formed between the oil pump and the oil cooler, and cooling oil is used as the cooling medium.

[0072] When the electric drive assembly cooling system 100 works, water is output by the water pump, flows along the cooling flow main path first, cools the on-board charger 1 and the contactor 5 in sequence, then flows through the two cooling flow branch paths and exchanges heat with the first power device 2 and the second power device 3 respectively, then converges to the cooling flow main path and enters the oil cooler to exchange heat with the cooling oil, and finally returns to the water pump and is cooled by the condenser in the water pump before re-entering the cooling flow main path. The cooling oil is output by the oil pump, then passes through the motor 13 area and carries away heat, then enters the oil cooler to exchange heat with water, and then returns to the oil pump.

[0073] In some embodiments, referring to Figure 8, the electric drive assembly cooling system 100 further comprises a third heat source arranged on the cooling flow main path or any of the cooling flow branch paths.

[0074] The third heat source includes but is not limited to the on-board charger, the vehicle controller, the domain controller, the converter, the contactor, the inductor, the capacitor, the power distribution device or the copper bar. The third heat source of the present embodiment preferably adopts the inductor 6. The inductor 6 also generates heat when current passes through, so the inductor 6 can also be included in the electric drive assembly cooling system 100. The position of the inductor 6 can be flexibly selected, and it can be arranged on the cooling flow main path or the cooling flow branch path, which is not limited in the present embodiment.

[0075] Figure 8 specifically shows another cooling flow schematic diagram of the electric drive assembly cooling system 100, wherein the on-board charger 1 and the contactor 5 are arranged in sequence on the cooling flow main path, and the first power device 2 and the second power device 3 are arranged on two cooling flow branch paths respectively, and the inductor 6 is arranged on the cooling flow main path between the oil cooler and the power device. A cooling loop is formed between the water pump and the oil cooler, and water is used as the cooling medium. Another cooling loop is formed between the oil pump and the oil cooler, and cooling oil is used as the cooling medium.

[0076] When the electric drive assembly cooling system 100 is working, water is output by the water pump, first flows along the cooling flow path main line, sequentially cools the on-board charger 1 and the contactor 5, then flows through two cooling flow path branches and exchanges heat with the first power device 2 and the second power device 3 respectively, then converges to the cooling flow path main line to exchange heat with the inductor 6, then enters the oil cooler to exchange heat with the cooling oil, and finally returns to the water pump to be cooled by the condenser in the water pump and then reenters the cooling flow path main line. The cooling oil is output by the oil pump, then passes through the motor 13 area and carries away heat, then enters the oil cooler to exchange heat with the water, and then returns to the oil pump.

[0077] In some embodiments, referring to FIG. 9, the electric drive assembly cooling system 100 further comprises a fourth heat source, and the power distribution device 7 is arranged on the cooling flow path main line or any of the cooling flow path branches.

[0078] The fourth heat source includes but is not limited to the on-board charger, the vehicle controller, the domain controller, the converter, the contactor, the inductor, the capacitor, the power distribution device or the copper bar. The fourth heat source of the present embodiment preferably adopts the power distribution device 7. The power distribution device 7 also generates heat when current passes through, and therefore, the power distribution device 7 can also be included in the electric drive assembly cooling system 100. The position of the power distribution device 7 can be flexibly selected, and the power distribution device 7 can be arranged on the cooling flow path main line or the cooling flow path branch, which is not limited in the present embodiment.

[0079] In addition, the power distribution device 7 has a lower heat generation than the power device, and when the power distribution device 7 and the power device are arranged on the same cooling flow path branch along the flow direction of the cooling medium, the power distribution device 7 can be placed before the power device.

[0080] In some embodiments, referring to FIG. 9, the fourth heat source and the first heat source are located on the same cooling flow path branch along the flow direction of the cooling medium, and the fourth heat source is located on the side close to the inlet of the cooling flow path branch of the first heat source.

[0081] The power distribution device 7 has a lower heat generation than the on-board charger 1, and if the cooling medium first flows through the on-board charger 1, the temperature of the cooling medium will be too high, which is not conducive to the heat dissipation of the power distribution device 7. Therefore, when the power distribution device 7 and the on-board charger 1 are arranged on the same cooling flow path branch, the power distribution device 7 can be arranged before the on-board charger 1, i.e., the power distribution device 7 is closer to the inlet of the cooling flow path branch.

[0082] In some embodiments, referring to FIG. 10, the electric drive assembly cooling system 100 further comprises a fifth heat source, and the fifth heat source is arranged on the cooling flow path main line or any of the cooling flow path branches.

[0083] The fifth heat source includes, but is not limited to, an on-board charger, a vehicle controller, a domain controller, a converter, a contactor, an inductor, a capacitor, a power distribution device, or a copper bar. The fifth heat source in the embodiment preferably adopts a copper bar 8. The copper bar 8 also generates heat when current passes through, and therefore, the copper bar 8 can also be included in the electric drive assembly heat dissipation system 100. The position of the copper bar 8 can be flexibly selected, and the copper bar 8 can be arranged on the cooling flow path main path or the cooling flow path branch path. The embodiment of the present application does not limit the position of the copper bar 8.

[0084] In addition, compared with the power device, the copper bar 8 has a relatively low heat generation, and the copper bar 8 can be placed before the power device along the flow direction of the cooling medium.

[0085] FIG. 10 specifically shows a cooling flow path schematic diagram of another electric drive assembly heat dissipation system 100. The on-board charger 1 and the copper bar 8 are arranged on two cooling flow path branch paths between the water pump and the contactor 5, respectively. The contactor 5 and the inductor 6 are arranged on the cooling flow path main path in sequence. The first power device 2 and the second power device 3 are arranged on two cooling flow path branch paths between the contactor 5 and the inductor 6, respectively.

[0086] In some embodiments, referring to FIG. 11, the first heat source includes a first capacitor 9 arranged on any of the cooling flow path branch paths.

[0087] The first capacitor 9 in the on-board charger 1 is a component with a relatively high heat generation, and can be separated from the body of the on-board charger 1 to be cooled separately, thereby improving the heat dissipation efficiency.

[0088] In some embodiments, referring to FIG. 10, the first heat source further includes a third power device 10. One of the cooling flow path branch paths includes at least two cooling flow path sub-branch paths arranged in parallel. The third power device 10 and the first capacitor 9 are arranged on different cooling flow path sub-branch paths, respectively.

[0089] The third power device 10 in the on-board charger 1 is a component with a relatively high heat generation, and can be separated from the body of the on-board charger 1 to be cooled separately, thereby improving the heat dissipation efficiency.

[0090] As shown in FIG. 12, when the third power device 10 and the first capacitor 9 are arranged on the same cooling flow path branch path, the cooling flow path branch path can be split into two cooling flow path sub-branch paths arranged in parallel. The third power device 10 and the first capacitor 9 are arranged on the two cooling flow path sub-branch paths, respectively, thereby avoiding the mutual influence of the third power device 10 and the first capacitor 9, and improving the heat dissipation efficiency of the third power device 10 and the first capacitor 9, respectively.

[0091] In some embodiments, referring to FIG. 11 and FIG. 12, one of the cooling flow branches includes at least two cooling flow sub-branches arranged in parallel, and the first power device 2 and the second power device 3 are arranged on different cooling flow sub-branches respectively.

[0092] When the first power device 2 and the second power device 3 are arranged on the same cooling flow branch, the cooling flow branch can be split into two cooling flow sub-branches arranged in parallel, and then the first power device 2 and the second power device 3 are arranged on the two cooling flow sub-branches respectively, so as to avoid the mutual influence of the first power device 2 and the second power device 3, thereby improving the heat dissipation efficiency of the third power device 10 and the first capacitor 9 respectively.

[0093] In some embodiments, the electric drive assembly heat dissipation system 100 further includes a first driving device 11, an outlet of the first driving device 11 is communicated with an inlet of the cooling flow main branch, and the first driving device 11 is used to drive the cooling medium to flow.

[0094] The first driving device 11 can be flexibly selected according to the type of the cooling medium, for example, when the cooling medium is air, the first driving device 11 can be a circulating fan; in some embodiments, the cooling medium is water, and therefore the first driving device 11 is selected as a water pump.

[0095] In some embodiments, the electric drive assembly heat dissipation system 100 further includes a heat exchanger 12, a first inlet of the heat exchanger 12 is communicated with an outlet of the cooling flow main branch, and a first outlet of the heat exchanger 12 is communicated with an inlet of the first driving device 11.

[0096] The type of the heat exchanger 12 can be flexibly selected according to the type of the cooling medium, and the embodiments of the present application do not limit it. In some embodiments, the cooling medium is selected as water and cooling oil, and therefore the heat exchanger 12 is selected as an oil cooler.

[0097] In addition, the number of the heat exchanger 12 can be one or multiple, and by increasing the number of the heat exchanger 12, the heat exchange efficiency between water and cooling oil can be improved. The number of the heat exchanger 12 can be flexibly selected according to specific needs by those skilled in the art, and the embodiments of the present application do not limit it.

[0098] In some embodiments, the electric drive assembly heat dissipation system 100 further includes an electric motor 13 and a second driving device 14, an outlet of the second driving device 14 is communicated with a second inlet of the heat exchanger 12, an inlet of the second driving device 14 is communicated with a second outlet of the heat exchanger 12, and the electric motor 13 is arranged on the cooling flow between the outlet of the second driving device 14 and the second inlet of the heat exchanger 12.

[0099] The second driving member 14 can be flexibly selected according to the type of the cooling medium, for example, when the cooling medium is air, the second driving member 14 can be a circulating fan; in some embodiments, the cooling medium is cooling oil, and thus the second driving member 14 can be an oil pump.

[0100] In addition, the number of the electric machines 13 can be one or two, which can be flexibly selected according to requirements, and the embodiments are not limited thereto.

[0101] FIG. 13 specifically discloses a heat dissipation system 100 of an electric drive assembly using two electric machines 13, wherein the cooling oil is output by an oil pump and is divided into two paths to cool the two electric machines 13 respectively.

[0102] In addition, as shown in FIGS. 14 and 15, the disclosure further provides a distribution scheme of an internal cooling flow path of a power device. The power device includes a plurality of groups of upper bridges and lower bridges, and the upper bridges and the lower bridges are supplied with external current and thus are prone to generate heat, and thus the upper bridges and the lower bridges need to be cooled and dissipated.

[0103] In FIG. 14, each group of upper bridges and lower bridges is distributed on a cooling flow path in parallel with each other, and since the heat generated by the upper bridges is generally less than that generated by the lower bridges, if the cooling medium first flows through the lower bridges, the temperature of the cooling medium will be too high, which is not conducive to the heat dissipation of the upper bridges. Therefore, along the flow direction of the cooling medium, the upper bridges can be arranged before the lower bridges.

[0104] In FIG. 15, a plurality of upper bridges are arranged on the same cooling flow path, and a plurality of lower bridges are arranged on another cooling flow path, so that the upper bridges and the lower bridges do not affect each other during heat dissipation, thereby improving the heat dissipation efficiency.

[0105] The embodiments of the disclosure further provide an electric drive assembly, which includes the heat dissipation system 100 of the electric drive assembly provided in the above embodiments.

[0106] The heat dissipation system 100 of the electric drive assembly is applied to the electric drive assembly, and each integrated component on the electric drive assembly is cooled by means of the cooling flow path in series and parallel combination, so as to balance the heat dissipation area and the flow rate of the cooling medium, reduce the accumulation of heat in the cooling medium, and improve the heat dissipation efficiency; and compared with the cooling flow path in complete parallel, the appropriate series connection can reduce the volume of the cooling flow path structure, which is conducive to the miniaturization design of the electric drive assembly, improves the space utilization rate, and reduces the processing cost.

[0107] The embodiments of the disclosure further provide a vehicle, which includes the electric drive assembly provided in the above embodiments.

[0108] The electric drive assembly is applied to a vehicle, and each integrated component of the electric drive assembly is cooled by a cooling flow path in series and parallel combination, so as to balance the heat dissipation area and the flow rate of the cooling medium, reduce the accumulation of heat in the cooling medium, improve the heat dissipation efficiency of the electric drive assembly, and improve the power performance of the vehicle.

[0109] Each embodiment in the specification is described in a related manner, and the same and similar parts between each embodiment can be referred to each other, and each embodiment mainly explains the difference from other embodiments.

[0110] The above only describes the preferred embodiments of the present disclosure, and is not used to limit the protection scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An electric drive assembly cooling system (100), wherein, It comprises: a first heat source, a first power device (2), a second power device (3), a cooling flow path trunk and at least two parallel cooling flow path branches; The cooling flow path trunk is communicated with each cooling flow path branch, and part or all of the first heat source, the first power device (2) and the second power device (3) are arranged on the cooling flow path branch and / or the cooling flow path trunk to balance the heat dissipation area of the cooling flow path and the flow rate of the cooling medium in the cooling flow path.

2. The electric drive assembly cooling system (100) according to claim 1, wherein when the first heat source is arranged on the cooling flow path trunk, the first power device (2) and the second power device (3) are arranged on different cooling flow path branches respectively; When the first heat source is arranged on one of the cooling flow path branches, the first power device (2) and the second power device (3) are arranged on different cooling flow path branches respectively, and one of the power devices is located on the same cooling flow path branch as the first heat source, or the first power device (2) and the second power device (3) are arranged on another cooling flow path branch simultaneously.

3. The electric drive assembly cooling system (100) according to claim 2, wherein the first heat source and the first power device (2) or the second power device (3) are arranged on the same cooling flow path branch, and along the flow direction of the cooling medium, the first power device (2) or the second power device (3) is located on the side of the first heat source close to the outlet of the cooling flow path branch.

4. The electric drive assembly heat sink system (100) of any one of claims 1-3, further comprising: A motor controller (4) is arranged on the cooling flow path trunk or any of the cooling flow path branches.

5. The electric drive assembly cooling system (100) according to claim 4, wherein the motor controller (4) and the first power device (2) or the second power device (3) are arranged on the same cooling flow path branch, and along the flow direction of the cooling medium, the first power device (2) or the second power device (3) is located on the side of the motor controller (4) close to the outlet of the cooling flow path branch.

6. The electric drive assembly heat sink system (100) of any one of claims 1-5, further comprising: A second heat source is arranged on the cooling flow path trunk or any of the cooling flow path branches.

7. The electric drive assembly heat sink system (100) of any one of claims 1-6, further comprising: A third heat source is arranged on the cooling flow path trunk or any of the cooling flow path branches.

8. The electric drive assembly heat sink system (100) of any one of claims 1-7, further comprising: A fourth heat source is arranged on the cooling flow path trunk or any of the cooling flow path branches.

9. The electric drive assembly cooling system (100) according to claim 8, wherein the fourth heat source and the first heat source are located on the same cooling flow path branch, and along the flow direction of the cooling medium, the fourth heat source is located on the side of the first heat source close to the inlet of the cooling flow path branch.

10. The electric drive assembly heat sink system (100) of any one of claims 1-9, further comprising: A fifth heat source is arranged on the cooling flow path trunk or any of the cooling flow path branches.

11. The electric drive assembly heat sink system (100) of any one of claims 1-10, the first heat source comprising: A first capacitor (9) is arranged on the cooling flow path trunk or any of the cooling flow path branches.

12. The electric drive assembly heat sink system (100) of claim 11, the first heat source further comprising: The third power device (10), wherein one of the cooling flow path branches comprises at least two cooling flow path sub-branches arranged in parallel, and the third power device (10) and the first capacitor (9) are arranged on different cooling flow path sub-branches, respectively.

13. The electric drive assembly heat dissipation system (100) according to any one of claims 1 to 12, wherein one of the cooling flow path branches comprises at least two cooling flow path sub-branches arranged in parallel, and the first power device (2) and the second power device (3) are arranged on different cooling flow path sub-branches, respectively.

14. The electric drive assembly heat sink system (100) of any one of claims 1-13, further comprising: A first driving member (11), an outlet of the first driving member (11) being communicated with an inlet of the cooling flow path main branch, and the first driving member (11) being used for driving the cooling medium to flow.

15. The electric drive assembly heat sink system (100) of claim 14, further comprising: A heat exchanger (12), a first inlet of the heat exchanger (12) being communicated with an outlet of the cooling flow path main branch, and a first outlet of the heat exchanger (12) being communicated with an inlet of the first driving member (11).

16. The electric drive assembly heat sink system (100) of claim 15, further comprising: An electric machine (13) and a second driving member (14), an outlet of the second driving member (14) being communicated with a second inlet of the heat exchanger (12), an inlet of the second driving member (14) being communicated with a second outlet of the heat exchanger (12), and the electric machine (13) being arranged on a cooling flow path between the outlet of the second driving member (14) and the second inlet of the heat exchanger (12).

17. An electric drive assembly, wherein, An electric drive assembly comprising the electric drive assembly heat dissipation system (100) according to any one of claims 1 to 16.

18. A vehicle, wherein, An electric drive assembly comprising the electric drive assembly according to claim 17.

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