Controller and water-cooling heat dissipation structure thereof

Abstract

The utility model discloses a controller water cooling heat dissipation structure, which comprises a controller shell and a water channel cover plate, the controller shell is provided with a cooling cavity, the cooling cavity is sequentially provided with a first cooling water channel and a second cooling water channel along the flowing direction of cooling liquid, and the first cooling water channel and the second cooling water channel are communicated; the water channel cover plate covers the first cooling water channel and the second cooling water channel in a sealing manner; the first cooling water channel is arranged corresponding to the capacitor, and the second cooling water channel is arranged corresponding to the IGBT. According to the controller water-cooling heat dissipation structure, the arrangement of the heat dissipation structure is more compact, the space utilization rate is high, the processing is convenient, and the cost is saved. The utility model also discloses a controller.

Description

Technical Field

[0001] The utility model relates to the technical field of controller heat dissipation, and particularly relates to a controller and a water-cooling heat dissipation structure thereof. Background Art

[0002] With the rapid development of new energy vehicle technology, the electric drive system has been widely applied. The motor controller is the core component in the electric drive system, which can convert the electric energy stored in the battery into the electric energy required to drive the motor, so as to realize the starting and running of the vehicle, the adjustment of the driving speed, etc.

[0003] The motor controller includes IGBT, capacitors and a housing. As the core device of the controller, if the temperature of the IGBT module is too high, it will directly affect the service life of the entire controller. The arrangement of the water-cooling flow channel becomes the key to the heat dissipation of the IGBT module. Although the capacitors generate less heat, due to the high temperature inside the motor controller, the capacitors also need to be heat-dissipated. At present, the water channels for cooling the capacitors and the IGBT are arranged separately, and the cooling structure is not compactly arranged, resulting in low space utilization rate. Summary of the Utility Model

[0004] In view of this, the utility model provides a water-cooling heat dissipation structure for a controller, the arrangement of the heat dissipation structure is more compact, the space utilization rate is high, the processing is convenient, and the cost is saved.

[0005] The utility model also provides a controller with the above water-cooling heat dissipation structure.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] A water-cooling heat dissipation structure for a controller, comprising:

[0008] A controller housing, provided with a cooling cavity, the cooling cavity is sequentially provided with a first cooling water channel and a second cooling water channel along the flowing direction of the coolant, and the first cooling water channel and the second cooling water channel are communicated;

[0009] A water channel cover plate, hermetically covering the first cooling water channel and the second cooling water channel;

[0010] The first cooling water channel is correspondingly arranged with the capacitors, and the second cooling water channel is correspondingly arranged with the IGBT.

[0011] Optionally, the first cooling water channel includes a plurality of serpentine water channels arranged in parallel, different serpentine water channels are separated by heat dissipation fins, and the heat dissipation fins extend along the flowing direction of the coolant;

[0012] One end of the first cooling water channel far away from the second cooling water channel is communicated with a water inlet.

[0013] Optionally, the second cooling water channel includes a first cooling chamber and a second cooling chamber which are separated by a partition board. The first cooling chamber and the second cooling chamber are arranged in parallel and in series. The first cooling chamber is communicated with the first cooling water channel, and the second cooling chamber is communicated with the water outlet.

[0014] Coolant stirring structures are arranged in both the first cooling chamber and the second cooling chamber.

[0015] Optionally, the coolant stirring structure includes a plurality of rows of heat dissipation columns, and the heat dissipation columns in adjacent rows are arranged staggeredly.

[0016] The height of the heat dissipation column is the same as the height of the partition board.

[0017] The shapes of the heat dissipation columns in the first cooling chamber and the second cooling chamber are the same or different.

[0018] Optionally, the heat dissipation column is a cylindrical column.

[0019] The diameter of the heat dissipation column is 4.5 mm.

[0020] Optionally, the coolant stirring structure includes a plurality of rows of heat dissipation bumps, and the heat dissipation bumps in adjacent rows are arranged staggeredly.

[0021] The height of the heat dissipation bump is the same as the height of the partition board.

[0022] Optionally, the water inlet and the water outlet of the cooling chamber are arranged on the same side of the controller housing.

[0023] Optionally, the water channel cover plate includes a first plate body and a second plate body which are connected together. The first plate body covers the first cooling water channel, and the second plate body covers the second cooling water channel.

[0024] Optionally, a plurality of structural reinforcing ribs are arranged on the water channel cover plate, and the structural reinforcing ribs are arranged staggeredly.

[0025] The structural reinforcing ribs are arranged on the surface of the water channel cover plate away from the cooling chamber.

[0026] It can be seen from the above technical solutions that for the controller water-cooling heat dissipation structure provided by the present utility model, by arranging the first cooling water channel for cooling the capacitor and the second cooling water channel for cooling the IGBT into a communication structure, the two cooling structures for different components are combined into one integrated structure. By using a set of corresponding coolant inlets and outlets, the temperature reduction of multiple components can be achieved. The layout of the heat dissipation structure is more compact, the space utilization rate is high, the processing is convenient, and the cost is saved.

[0027] The present utility model further provides a controller, which has the above-mentioned water-cooled heat dissipation structure, and thus has the advantages of the above-mentioned water-cooled heat dissipation structure, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic structural diagram of the controller housing provided by the embodiment of the present utility model;

[0030] Figure 2 It is a schematic structural diagram of the water channel cover plate provided by the embodiment of the present utility model.

[0031] Wherein:

[0032] 1. First cooling water channel, 101. Third cooling cavity, 102. Fourth cooling cavity, 2. Second cooling water channel, 201. First cooling cavity, 202. Second cooling cavity, 3. Heat dissipation fin, 4. Partition rib, 5. Partition board, 6. Water inlet, 7. Heat dissipation column, 8. Water outlet, 9. First plate body, 10. Second plate body, 11. Structural strengthening rib. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The present utility model discloses a water-cooled heat dissipation structure for a controller, and the layout of the heat dissipation structure is more compact, with high space utilization rate, convenient processing, and cost savings.

[0034] The present utility model also discloses a controller having the above-mentioned water-cooled heat dissipation structure.

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0036] Refer to Figure 1 and Figure 2, the water-cooled heat dissipation structure of the controller of the present utility model includes a cooperatively arranged controller housing and a water channel cover plate. A cooling cavity is provided on the controller housing. Along the flowing direction of the coolant, a first cooling water channel 1 and a second cooling water channel 2 are sequentially arranged in the cooling cavity. The first cooling water channel 1 and the second cooling water channel 2 are connected and arranged, and the coolant flows from the first cooling water channel 1 to the second cooling water channel 2. The water channel cover plate is hermetically covered on the first cooling water channel 1 and the second cooling water channel 2. The first cooling water channel 1 is correspondingly arranged with the capacitors in the controller, and the second cooling water channel 2 is correspondingly arranged with the IGBTs.

[0037] Among them, generally water is selected as the coolant, which has low cost and good heat dissipation effect. The second cooling water channel 2 can cool multiple IGBTs simultaneously, realizing the control of multiple motors by one controller platform, and reducing the manufacturing and installation costs of the controller.

[0038] The water-cooled heat dissipation structure of the controller of the present utility model sets the first cooling water channel 1 for cooling the capacitors and the second cooling water channel 2 for cooling the IGBTs into a connected structure, making the two cooling structures for different components combine into one integrated structure. By adopting a set of correspondingly arranged coolant inlet and outlet, the cooling of multiple components can be realized. The layout of the heat dissipation structure is more compact, with high space utilization rate, convenient processing, and cost savings.

[0039] In an embodiment, two IGBT modules to be cooled are arranged at the corresponding position of the second cooling water channel 2, and the temperature differences between the two IGBT modules are basically the same, achieving the purpose of controlling two motors by one controller platform, and greatly reducing the manufacturing and installation costs of the controller.

[0040] In order to reduce the resistance to the cooling water flowing into the cooling cavity, the first cooling water channel 1 includes a plurality of serpentine water channels arranged in parallel, as Figure 1 shown. Different serpentine water channels are separated by heat dissipation fins 3, and the heat dissipation fins 3 extend along the flowing direction of the coolant. The serpentine water channels are arranged in a serpentine structure, making the transition of the water channel smooth, reducing the resistance to the water flow, and making the coolant flow distribution uniform through each module. Specifically, the first cooling water channel 1 includes a third cooling cavity 101 and a fourth cooling cavity 102 separated by a partition rib plate 4. The third cooling cavity 101 and the fourth cooling cavity 102 are arranged in parallel, and the serpentine water channels wind and extend along the third cooling cavity 101 and the fourth cooling cavity 102, thereby extending the flow path length of the serpentine water channels, extending the flowing time of the cooling water in the flow path, extending the heat exchange time, and improving the heat dissipation efficiency. One end of the first cooling water channel 1 far from the second cooling water channel 2 is communicated with the water inlet 6. The water inlet 6 is used to input the cooling water into the first cooling water channel 1.

[0041] In a specific embodiment, the second cooling water channel 2 includes a first cooling cavity 201 and a second cooling cavity 202 separated by a partition plate 5. The first cooling cavity 201 and the second cooling cavity 202 are arranged in parallel and in series, that is, the first cooling cavity 201 and the second cooling cavity 202 are arranged in parallel and are connected to each other, thereby extending the flow path length of the second cooling water channel 2 and improving the heat dissipation efficiency. For the first cooling cavity 201 and the second cooling cavity 202, the second cooling cavity 202 is communicated with the water outlet 8, and the first cooling cavity 201 is communicated with the first cooling water channel 1.

[0042] To improve the heat dissipation effect, a coolant stirring structure is provided in both the first cooling cavity 201 and the second cooling cavity 202. In one embodiment, the coolant stirring structure includes a plurality of rows of heat dissipation columns 7, and the adjacent rows of heat dissipation columns 7 are staggered. By arranging the staggered heat dissipation columns 7 in the second cooling water channel 2, the coolant flowing through the second cooling water channel 2 can be stirred, which can cause the cooling water inside the water channel to form a turbulent flow, improve the heat exchange efficiency of the cooling water channel for the IGBT module, and improve the heat dissipation effect of the cooling water channel. To improve the structural strength of the heat dissipation structure, the height of the heat dissipation column 7 is the same as the height of the partition plate 5. In this way, the top of the heat dissipation column 7 can also support the water channel cover plate. Similarly, the tops of the heat dissipation fins 3 and the partition ribs 4 are in contact with the surface of the water channel cover plate close to the cooling cavity, thereby forming a support for the water channel cover plate, which is not only beneficial to improving the structural strength of the heat dissipation structure, but also can prevent the cooling water from mixing in different water channels. Among them, the shapes of the heat dissipation columns in the first cooling cavity 201 and the second cooling cavity 202 can be the same or different.

[0043] To reduce the resistance of the heat dissipation column 7 to the cooling water, the heat dissipation column 7 is preferably a cylindrical column. In one embodiment, the diameter of the heat dissipation column 7 is 4.5 mm.

[0044] In other embodiments, the coolant stirring structure can also be a plurality of rows of heat dissipation bumps (not shown in the figure), and the adjacent rows of heat dissipation bumps are staggered, and the height of the heat dissipation bumps is the same as the height of the partition plate 5. It can be understood that the heat dissipation bump is an inverted V-shaped convex structure with a large bottom diameter and a pointed top.

[0045] For the convenience of installation, the water inlet 6 and the water outlet 8 of the cooling cavity are arranged on the same side of the controller housing, as Figure 1 shown. To improve the structural compactness, the first cooling water channel 1 and the second cooling water channel 2 are arranged in parallel. The water inlet 6 and the water outlet 8 are both sealed and installed by means of interference fit and applying sealant, and the installation is simple and the sealing stability is better.

[0046] In one embodiment, the water channel cover plate includes a first plate body 9 and a second plate body 10 connected together, as Figure 2As shown in the figure, the first plate body 9 covers the first cooling water channel 1, and the second plate body 10 covers the second cooling water channel 2, thereby facilitating the sealing of the cooling cavity of the controller housing.

[0047] In order to improve the structural reliability of the water channel cover plate, a number of structural reinforcing ribs 11 are provided on the water channel cover plate. The structural reinforcing ribs 11 are arranged in a staggered manner, thereby improving the structural strength of the water channel cover plate. In order to avoid the influence of the arrangement of the structural reinforcing ribs 11 on the internal structure of the cooling cavity, the structural reinforcing ribs 11 are arranged on the surface of the water channel cover plate away from the cooling cavity. The wall thickness of the water channel cover plate is uniform. By setting the structural reinforcing ribs 11 to enhance the structural strength, the weight is reduced and the production material cost is saved. The water channel cover plate is formed by high-pressure die casting with ADC12 material, which ensures the production efficiency, improves the surface roughness and flatness of the water channel cover plate, and also ensures the dimensional accuracy. The water channel cover plate is provided with structural reinforcing ribs 11, which increases the structural strength and stiffness of the plate body, effectively prevents water leakage caused by the deformation of the plate body under a certain pressure, and further improves the heat dissipation capacity. Similarly, the controller housing is made by high-pressure die casting with ADC12 material, which ensures the production efficiency and improves the surface roughness and flatness of the controller housing.

[0048] In the controller water-cooling heat dissipation structure of the present utility model, the cooling water in the water channel first flows through the capacitor and then through the heat dissipation module under the IGBT module. The heat dissipation fins 3 for guiding and dividing the flow are arranged inside the water channel under the capacitor. A number of cylindrical heat dissipation columns 7 under the IGBT module form an interleaved water channel. The coolant flows in the water channel according to a preset flow rate, and the flow rate of the coolant in the water channels under each module is uniform. The water channel cover plate and the controller housing are sealed by friction stir welding process, which ensures the water channel sealing performance and also saves the assembly cost.

[0049] The present utility model also provides a controller, including a controller housing, and a water-cooling heat dissipation structure is provided on the controller housing, and the water-cooling heat dissipation structure is the above-mentioned controller water-cooling heat dissipation structure.

[0050] In the description of this solution, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this solution.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this solution, "a plurality of" means two or more, unless otherwise specifically defined.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. For the same or similar parts among the various embodiments, reference may be made to each other.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A controller water cooling structure, characterized in that: include: The controller housing is provided with a cooling cavity, wherein the cooling cavity is provided with a first cooling water channel and a second cooling water channel in sequence along the flow direction of the coolant, and the first cooling water channel and the second cooling water channel are connected; A water channel cover plate, a sealing cover is arranged on the first cooling water channel and the second cooling water channel; The first cooling water channel is arranged corresponding to the capacitor, and the second cooling water channel is arranged corresponding to the IGBT.

2. The controller water cooling heat dissipation structure according to claim 1 is characterized in that: The first cooling water channel comprises a plurality of serpentine water channels arranged in parallel, and different serpentine water channels are separated by heat dissipation fins, and the heat dissipation fins are extended along the flow direction of the coolant; One end of the first cooling water channel away from the second cooling water channel is communicated with the water inlet.

3. The controller water cooling and heat dissipation structure according to claim 1 or 2, characterized in that: The second cooling water channel comprises a first cooling cavity and a second cooling cavity separated by a partition, the first cooling cavity and the second cooling cavity are arranged in parallel and in series, the first cooling cavity is communicated with the first cooling water channel, and the second cooling cavity is communicated with the water outlet; The first cooling chamber and the second cooling chamber are both provided with a coolant stirring structure.

4. The controller water cooling structure according to claim 3 is characterized in that: The coolant stirring structure comprises a plurality of rows of heat dissipation columns, and the heat dissipation columns in adjacent rows are arranged in a staggered manner; The height of the heat dissipation column is the same as the height of the partition; The shapes of the heat dissipation columns in the first cooling cavity and the second cooling cavity are the same or different.

5. The controller water cooling and heat dissipation structure according to claim 4 is characterized in that: The heat dissipation column is a cylindrical column; The diameter of the heat dissipation column is 4.5 mm.

6. The controller water cooling and heat dissipation structure according to claim 3, characterized in that: The coolant stirring structure comprises a plurality of rows of heat dissipation bumps, and the heat dissipation bumps in adjacent rows are arranged in a staggered manner; The height of the heat dissipation protrusion is the same as the height of the partition.

7. The controller water cooling and heat dissipation structure according to claim 1, characterized in that: The water inlet and the water outlet of the cooling chamber are arranged on the same side of the controller housing.

8. The controller water cooling and heat dissipation structure according to claim 1, characterized in that: The water channel cover plate includes a first plate body and a second plate body connected together, the first plate body is covered on the first cooling water channel, and the second plate body is covered on the second cooling water channel.

9. The controller water cooling and heat dissipation structure according to claim 1, characterized in that: The waterway cover plate is provided with a plurality of structural reinforcement ribs, and the structural reinforcement ribs are arranged in a staggered manner; The structural reinforcement ribs are arranged on the surface of the water channel cover plate away from the cooling cavity.

10. A controller, comprising a controller housing, wherein a water cooling structure is provided on the controller housing, characterized in that: The water-cooling heat dissipation structure is the controller water-cooling heat dissipation structure according to any one of claims 1-9.

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