A water-cooled radiator and a motor controller for new energy vehicles

Abstract

The present invention provides a water-cooled radiator and a motor controller for new energy vehicles, comprising: a main body, the main body comprising a heat dissipation cavity: the main body also comprising an annular groove, the annular groove being arranged around the heat dissipation cavity; a water channel inlet and a water channel outlet, the water channel inlet and the water channel outlet being located on the main body and both being connected to the heat dissipation cavity; a diverter, detachably installed in the heat dissipation cavity, comprising a drainage portion, a guide portion and a penetration portion, the drainage portion and the guide portion being located at a first end of the diverter and a second end opposite to the first end, the penetration portion being located between the first end and the second end, and penetrating the diverter; when the diverter is installed inside the heat dissipation cavity, the drainage portion and the guide portion cooperate with the water channel inlet and the water channel outlet to form a continuous water channel for flushing the heat generating components. The present invention effectively dissipates heat for a power module with a pin-fin structure, reduces the processing cost of the radiator, and improves the sealing reliability of the radiator.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor controllers, and in particular relates to a water-cooled radiator and a motor controller for new energy vehicles. Background Art

[0002] For motor controllers used in new energy vehicles, due to their high power and small size, they usually need to be equipped with water-cooled radiators for forced cooling to ensure continuous output power. In order to reduce the cost of structural parts and facilitate component assembly, the radiator is generally directly integrated on the main housing and mass-produced through a die-casting process. However, due to the limitations of the die-casting process, it is usually difficult to directly form a closed annular water channel. To solve this problem, a motor controller radiator is known, which realizes a closed water channel by tightening a sealing ring by screwing a plurality of screws on the bottom sealing cover plate, such as Patent Document 1. Another motor controller radiator uses a welding process such as brazing or stir friction welding to weld the upper and lower cover plates together to form a closed water channel, such as Patent Document 2.

[0003] Patent document 1: CN 207340383 U A motor controller radiator and a motor controller using the same

[0004] Patent document 2: CN 101697448 B Converter power module double-sided water cooling radiator

[0005] However, the first solution uses a cover plate to tighten the sealing ring with screws to seal the water channel, which adds two components, the sealing ring and the cover plate, increases the cost and complexity of the installation process, and also brings the risk of sealing failure due to aging of the sealing ring and loosening of the screws. Similarly, the second solution uses welding processes such as brazing, which also increases the process cost and complexity. At the same time, bubbles or cracks caused by die-casting around the weld are also likely to cause poor sealing problems. Summary of the invention

[0006] Therefore, in order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a water-cooled radiator and a motor controller for new energy vehicles to reduce processing costs and improve sealing reliability.

[0007] In order to achieve the above object, a water-cooled radiator is provided, comprising:

[0008] A main body, the main body includes a heat dissipation cavity: the main body also includes an annular groove, the annular groove is arranged around the heat dissipation cavity;

[0009] A water channel inlet and a water channel outlet, wherein the water channel inlet and the water channel outlet are located on the main body and are both connected to the heat dissipation cavity;

[0010] A flow diverter, the flow diverter is detachably installed in the heat dissipation cavity, the flow diverter comprises a flow guide portion and a flow guide penetrating portion, the flow guide portion and the flow guide portion are respectively located at a first end of the flow diverter and a second end opposite to the first end, the penetrating portion is located between the first end and the second end, and penetrates the flow diverter;

[0011] When the diverter is installed inside the heat dissipation cavity, the drainage portion and the guide portion cooperate with the water channel inlet and the water channel outlet to form a continuous water channel for flushing the heat-generating components.

[0012] Furthermore, the drainage portion includes a drainage groove, and when the diverter is installed in the heat dissipation cavity, the drainage groove is connected to the water channel inlet.

[0013] Furthermore, the drainage groove comprises a first surface, a second surface and a third surface, the first surface forms the bottom surface of the drainage groove, and the second surface and the third surface together form the sloped side surface of the drainage groove.

[0014] Furthermore, the guide portion includes an arc-shaped corner, and the arc-shaped corner can guide the water flow to turn.

[0015] Furthermore, the penetration portion includes a slot, and the slot transversely penetrates the diverter.

[0016] Furthermore, the upper and lower surfaces of the heat dissipation cavity are both penetrating surfaces.

[0017] Furthermore, the upper surface of the heat dissipation cavity is a penetrating surface, and the lower surface is a closed structure.

[0018] Furthermore, the waterway inlet and the waterway outlet are located on the same side of the main body.

[0019] Furthermore, the waterway inlet and the waterway outlet are respectively located on both sides of the main body.

[0020] The present invention also provides a motor controller for a new energy vehicle, comprising the water-cooled radiator as described above.

[0021] Compared with the prior art, the present invention can ensure that a sealed water channel with good performance is formed without using complicated processes such as stir friction welding or sealing cover plates, so as to effectively dissipate heat for a power module with a pin-fin structure, thereby reducing the processing cost of the radiator and improving the sealing reliability of the radiator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the water-cooled radiator of the present invention.

[0023] Figure 2 It is a schematic diagram of an embodiment of a water-cooled radiator of the present invention.

[0024] Figure 3 FIG. 4 is a schematic diagram of another embodiment of the water-cooled radiator of the present invention. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0026] In one embodiment of the present invention, Figure 1 As shown, a water cooling radiator is provided, comprising:

[0027] The main body 1 includes a heat dissipation cavity 11. The main body 1 also includes an annular groove 12, and the annular groove 12 is arranged around the heat dissipation cavity 11;

[0028] A water channel inlet 3 and a water channel outlet 4, wherein the water channel inlet 3 and the water channel outlet 4 are located on the main body 1 and are both connected to the heat dissipation cavity 11;

[0029] A flow divider 2, the flow divider 2 is detachably installed in the heat dissipation cavity 11, the flow divider 2 comprises a flow guiding portion 21, a flow guiding portion 22, and a penetration portion 23, the flow guiding portion 21 and the flow guiding portion 22 are respectively located at a first end of the flow divider 2 and a second end opposite to the first end, the penetration portion 23 is located between the first end and the second end, and penetrates the flow divider 2;

[0030] When the diverter 2 is installed inside the heat dissipation cavity 11 , the drainage portion 21 , the guide portion 22 , and the penetration portion 23 cooperate with the water channel inlet 3 and the water channel outlet 4 to form a continuous water channel for flushing the heat-generating components.

[0031] The present invention can realize water cooling of dual power modules / single power modules only through a simple installation process; at the same time, the main radiator (main housing) can be formed by integral die casting, and the manifold can be processed by low-cost, easy-to-form materials. Without using complex processes, an efficient water channel structure is realized, and the processing cost and the risk of sealing failure are reduced.

[0032] In one embodiment, the main body 1 of the water-cooled radiator is integrally die-cast, and at least one side of the upper and lower surfaces of the internal heat dissipation cavity 11 is penetrated. There are annular grooves 12 around the penetrated surface, which are used to fill the sealing device when connected to the heat-generating component to form a sealed heat dissipation space inside the heat dissipation cavity 11.

[0033] In one embodiment, the diverter 2 is a plate-shaped structure, which is detachably mounted inside the internal heat dissipation cavity 11 of the main body 1 of the water-cooled radiator. In one embodiment, the plate-shaped diverter 2 is fixed at the center of the heat dissipation cavity 11 by means of screws 13 or a slot structure. The plate-shaped diverter 2 fixed at the center of the heat dissipation cavity 11 divides the heat dissipation cavity 11 into two parts, an upper part and an lower part, and can dissipate heat from the upper and lower heat-generating components at the same time.

[0034] In one embodiment, a sealing material is disposed in the annular groove 12 , and when heat dissipation is performed, the annular groove 12 and the sealing material together isolate the internal heat dissipation cavity 11 from the outside of the water-cooled radiator.

[0035] In one embodiment, the material of the diverter 2 is aluminum, nylon or other materials that are easy to process and corrosion-resistant.

[0036] In one embodiment, when the shunt 2 is installed in the heat dissipation cavity 11 , a 0.5 mm installation gap is reserved between the surface of the shunt 2 and the lower bottom surface of the corresponding heat-generating IGBT, thereby avoiding interference during installation.

[0037] In one embodiment, the drainage portion 21 includes a drainage groove. When the diverter 2 is installed in the heat dissipation cavity 11, the drainage groove is connected to the water channel inlet 3.

[0038] In one embodiment, the drainage groove includes a first surface 211, a second surface 212 and a third surface 213, the first surface 211 forms the bottom surface of the drainage groove, and the second surface 212 and the third surface 213 together form the sloped side of the drainage groove, thereby facilitating the drainage of the cooling water at the waterway inlet 3 into the heat dissipation space.

[0039] In order to improve the diversion effect of the waterway, the diversion portion 22 includes an arc-shaped corner, and the arc-shaped corner can guide the water flow to turn.

[0040] In one embodiment, in order to reduce the weight and cost of the diverter 2 and facilitate process forming, the through portion 23 includes a slot that transversely penetrates the diverter 2. The diverter plate can form a corresponding waterway profile by forming different shapes on the surface.

[0041] In one embodiment, Figure 2As shown, the upper and lower surfaces of the heat dissipation cavity 11 are both penetrating surfaces. The upper and lower surfaces of the heat dissipation cavity 11 of the integrally die-cast water-cooled radiator are both penetrating surfaces. The first pin-fin power module 5 and the second pin-fin power module 6 are respectively located on the upper and lower surfaces of the water-cooled radiator. The sealing ring in the annular groove 12 is compressed by the outer edge of the module through a number of screws to form a closed waterway space in the heat dissipation cavity 11; the cooling water flows from the waterway inlet 3 through the drainage portion 21 of the diverter 2 into the upper half of the heat dissipation cavity 11 to cool the water-cooled substrate of the power module 5, and then flows into the lower half of the heat dissipation cavity 11 through the arc corner of the diverter 22 to cool the water-cooled substrate of the power module 6, and finally flows out of the radiator through the waterway outlet 4.

[0042] In one embodiment, Figure 3 As shown, the upper surface of the heat dissipation cavity 11 is a penetrating surface, and the lower surface is a closed structure. The upper surface of the heat dissipation cavity 11 of the integrally die-cast water-cooled radiator is a penetrating surface, and the lower surface is a closed structure. The first pin-fin power module 5 uses a plurality of screws to use the outer edge of the module to press the sealing ring in the annular groove 12 to the upper surface of the water-cooled radiator, forming a closed water channel space in the heat dissipation cavity 11; the cooling water flows from the water channel inlet 3 through the drainage portion 21 of the diverter 2 into the upper half of the heat dissipation cavity 11, cools the water-cooled substrate of the power module 5, and then flows into the lower half of the heat dissipation cavity 11 through the arc corner of the diverter 22 of the diverter 2, and finally flows out of the radiator through the water channel outlet 4.

[0043] In one embodiment, the water channel inlet 3 and the water channel outlet 4 are located on the same side of the main body.

[0044] In one embodiment, the water channel inlet 3 and the water channel outlet 4 are respectively located on both sides of the main body, and accordingly, the upper and lower water channel parts of the diverter plate can form a parallel loop.

[0045] The present invention also provides a motor controller for a new energy vehicle, comprising the water-cooled radiator as described above.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A water-cooled radiator, characterized in that: include: The main body includes a heat dissipation cavity and an annular groove, at least one side of the upper and lower surfaces of the heat dissipation cavity is penetrated; an annular groove is arranged around the penetrated surface, so as to fill the sealing device when connected with the heat-generating component, and form a sealed heat dissipation space inside the heat dissipation cavity; A water channel inlet and a water channel outlet, wherein the water channel inlet and the water channel outlet are located on the main body and are both connected to the heat dissipation cavity; A flow diverter, the flow diverter is detachably installed in the heat dissipation cavity, and divides the heat dissipation cavity into two parts, the flow diverter comprises a flow guide portion, a flow guide portion, and a penetration portion, the flow diverter and the flow guide portion are respectively located at a first end of the flow diverter and a second end opposite to the first end, the penetration portion is located between the first end and the second end, and penetrates the flow diverter, the flow guide portion is used to guide the water flow to turn; When the diverter is installed inside the heat dissipation cavity, the drainage portion and the guide portion cooperate with the water channel inlet and the water channel outlet to form a continuous water channel for flushing the heat-generating components.

2. The water-cooled radiator according to claim 1, characterized in that: The drainage portion includes a drainage groove, and when the diverter is installed in the heat dissipation cavity, the drainage groove is connected to the water channel inlet.

3. The water-cooled radiator according to claim 2, characterized in that: The drainage groove comprises a first surface, a second surface and a third surface, wherein the first surface forms the bottom surface of the drainage groove, and the second surface and the third surface together form the slope side surface of the drainage groove.

4. The water-cooled radiator according to claim 1, characterized in that: The guide portion includes an arc-shaped corner, and the arc-shaped corner can guide the water flow to turn.

5. The water-cooled radiator according to claim 1, characterized in that: The penetration portion includes a hollow groove, and the hollow groove penetrates the diverter transversely.

6. The water-cooled radiator according to claim 1, characterized in that: The upper and lower surfaces of the heat dissipation cavity are both penetrating surfaces.

7. The water-cooled radiator according to claim 1, characterized in that: The upper surface of the heat dissipation cavity is a penetrating surface, and the lower surface is a closed structure.

8. The water-cooled radiator according to claim 1, characterized in that: The waterway inlet and the waterway outlet are located on the same side of the main body.

9. The water-cooled radiator according to claim 1, characterized in that: The waterway inlet and the waterway outlet are respectively located on both sides of the main body.

10. A motor controller for new energy vehicles, characterized in that: It comprises a water-cooled radiator as described in any one of claims 1 to 9.

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