Cooling water runner structure of water cooling controller of pure electric vehicle

Abstract

The invention provides a blade electric vehicle water-cooling controller cooling water runner structure which comprises a water-cooling plate, a water-cooling base is integrally arranged at the lower end of the water-cooling plate, and an IGBT module is installed on the side, away from the water-cooling base, of the water-cooling plate so that the IGBT module can be cooled through the water-cooling base; and the cover plate is mounted at the outer end of the water cooling seat and is fixedly combined and connected with the water cooling seat through a friction stir welding process. A first cooling flow channel, a second cooling flow channel and a third cooling flow channel of the device are separated through heat conducting plates, the first cooling flow channel and the second cooling flow channel are not communicated, turbulent flow is avoided, the second cooling flow channel exchanges heat with the first cooling flow channel through reverse flowing of cooling water, the uniformity of the water level of the first cooling flow channel is improved, and the cooling efficiency is improved. And heat conduction is facilitated, the water temperature in the first cooling flow channel is reduced, the cooling performance of the first cooling flow channel on the water cooling plate is further improved, the problem of heating of the IGBT module is solved, and temperature balance of the IGBT module is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of controller cooling, and in particular to a cooling water flow channel structure of a water-cooled controller of a pure electric vehicle. Background Art

[0002] The drive motor controller MCU on electric vehicles needs to use IGBT for power conversion. IGBT, or insulated gate bipolar transistor, is a composite fully controlled voltage-driven power semiconductor device composed of BJT (bipolar junction transistor) and MOS (insulated gate field effect transistor). It can improve electricity efficiency and quality, and is a key technology to solve energy shortages and reduce carbon emissions.

[0003] The main working state of IGBT is the conducting state. When a sufficient voltage is applied to its control terminal, a conducting channel is formed, allowing current to flow through it. This is because the voltage at the control terminal activates the MOSFET part, thus forming a conducting path. Off state: When the control terminal voltage drops or is disconnected, the IGBT will enter the off state and current cannot flow through. At this time, the IGBT no longer allows current to pass through.

[0004] IGBT has unidirectional conduction characteristics and can be switched on and off. When a positive voltage is applied to the gate of the IGBT, current is allowed to pass; otherwise, current is not allowed to pass. This allows the IGBT to control the current size and direction well and reduce power loss; since the IGBT is lower than the bipolar transistor and the switching speed is faster than the MOSFET, the IGBT has lower conduction loss and switching loss. The IGBT has a strong current carrying capacity of more than 300A. When carrying a large current, the IGBT will heat up. Excessive temperature will affect the instability of the electronic components in the IGBT and cause device failure, making the IGBT unable to work normally. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a cooling water flow channel structure of a pure electric vehicle water-cooled controller to evenly cool the IGBT module, achieve temperature balance of the IGBT module, and solve the problems raised in the above background technology.

[0006] The technical problem solved by the present invention is achieved by adopting the following technical solution: A cooling water flow channel structure of a water-cooled controller of a pure electric vehicle, comprising: A water cooling plate, wherein a water cooling seat is integrally provided at the lower end of the water cooling plate, and the IGBT module is mounted on a side of the water cooling plate away from the water cooling seat, so as to cool the IGBT module through the water cooling seat; The cover plate is mounted on the outer end of the water cooling seat and is fixedly connected to the water cooling seat by a stir friction welding process. The outer end of the cover plate is provided with a water inlet and a water outlet to circulate water in the water cooling seat; The water-cooling seat is provided with a main flow channel connected to a water inlet pipe port and a cooling cavity arranged on one side of the main flow channel. The cooling cavity includes a first cooling flow channel, a second cooling flow channel and a third cooling flow channel which are arranged in sequence in layers. The first cooling flow channel is attached to the water-cooling plate to cool the water-cooling plate. One side of the first cooling flow channel is connected to the main flow channel, and the other side is connected to the water outlet pipe port. The second cooling flow channel is arranged on a side of the first cooling flow channel away from the water-cooling plate. The second cooling flow channel is connected to the main flow channel through a branch hole. The side of the second cooling flow channel away from the branch hole is connected to the third cooling flow channel. The water flow directions of the first cooling flow channel and the second cooling flow channel are opposite, and the third cooling flow channel is connected to the water outlet pipe port outside.

[0007] Specifically, the structure is provided with two cooling water channels, the first cooling water channel directly cools the water-cooled plate, and the other cooling water channel is used to cool the first cooling channel and improve the uniformity of the water temperature of the first cooling water channel. The second cooling channel is used to cool the end of the first cooling channel and reduce the temperature of the end of the first cooling channel, thereby achieving uniform cooling of the IGBT module by the water-cooled plate.

[0008] As a further embodiment of the present invention: A heat conduction plate is provided between the first cooling channel and the second cooling channel, and between the second cooling channel and the third cooling channel, respectively, and the channels are separated by the heat conduction plate.

[0009] As a further embodiment of the present invention: A partition is provided between the main flow channel and the cooling cavity, one side of the main flow channel is connected to the water inlet pipe port, and the other side is connected to the first cooling flow channel, and a guide plate is provided on the side of the main flow channel away from the water inlet pipe port to guide the water flow in the main flow channel into the first cooling flow channel, and the side of the first cooling flow channel away from the guide plate is connected to the water outlet pipe port.

[0010] As a further embodiment of the present invention: The water inlet and outlet are located on the same side of the water cooling seat, and the water outlet is located at the second cooling channel and a sealing pipe is provided so that the second cooling channel is not directly connected to the water outlet.

[0011] As a further embodiment of the present invention: The branch holes are opened at corresponding positions in the middle of the partition to connect the main flow channel and the second cooling flow channel. The main flow channel is provided with a guide column corresponding to the branch hole. The guide column is arranged on the side of the main flow channel away from the branch hole. The guide column is an arc structure to push water to flow into the branch hole.

[0012] As a further embodiment of the present invention: A diverter plate is provided at a corresponding position of the branch hole in the second cooling channel to ensure uniform water flow. A through hole connected to the third cooling channel is provided on the side of the second cooling channel away from the branch hole to guide the water flow into the third cooling channel. The third cooling channel is connected to the water outlet pipe, and the water flow discharged from the sealed pipe also flows into the water outlet pipe through the third cooling channel.

[0013] As a further embodiment of the present invention: A plurality of groups of heat-conducting columns are distributed in the first cooling channel and the second cooling channel to increase the contact area with water. One end of the heat-conducting column is fixedly connected to the water-cooling plate to improve the heat exchange efficiency between the water-cooling plate and water.

[0014] As a further embodiment of the present invention: The water cooling plate is mounted on the housing of the controller by means of bolts, and the heat sink at the bottom of the IGBT module is mounted on the water cooling plate and fixed by means of bolts.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the water inlet and the water outlet are externally connected to the water channel of the shell, the water inlet supplies cooling water to two cooling water channels through the main channel, the first cooling water channel directly cools the water-cooled plate, and the other cooling water channel is used to cool the first cooling channel, and the water flow direction in the second cooling channel is opposite to that of the first cooling channel. Because the temperature at the end of the first cooling channel is higher, the second cooling channel exchanges heat from the end of the first cooling channel to improve the uniformity of the water temperature of the first cooling water channel, thereby avoiding uneven cooling of the IGBT module by the water-cooled plate, resulting in high local temperature and affecting the performance of the IGBT module.

[0016] The first cooling channel, the second cooling channel and the third cooling channel of the device are separated by a heat conduction plate. The first cooling channel and the second cooling channel are not connected to avoid turbulence. The second cooling channel uses the reverse flow of cooling water to exchange heat with the first cooling channel, thereby improving the uniformity of the water level in the first cooling channel and facilitating the conduction of heat, reducing the water temperature in the first cooling channel, and further improving the performance of the first cooling channel in cooling the water-cooled plate, solving the problem of heating of the IGBT module and achieving temperature balance of the IGBT module.

[0017] When the MCU is running, the cooling water coming in from the water channel of the shell circulates through the water channel of the water cooling seat, taking away a large amount of heat generated by the operation of the IGBT, so that the IGBT is in a balanced state, that is, a steady state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of a partial cross-sectional structure of the first cooling channel of the present invention; Figure 3It is a schematic diagram of a partial cross-sectional structure of the second cooling channel of the present invention; Figure 4 It is a schematic diagram of a partial cross-sectional structure of the third cooling channel of the present invention; Markings in the figure: 1. Water-cooled plate; 2. Water-cooled seat; 3. Cover plate; 4. Heat-conducting column; 5. IGBT module; 20. Diverter plate; 21. Main flow channel; 22. First cooling flow channel; 23. Second cooling flow channel; 24. Third cooling flow channel; 25. Branch hole; 26. Heat-conducting plate; 27. Partition; 28. Guide plate; 29. ​​Guide column; 31. Water inlet pipe; 32. Water outlet pipe; 33. Sealed pipe. DETAILED DESCRIPTION

[0019] In order to make the technical means for realizing the present invention, the creative features, the objectives and effects to be achieved easily understood, the present invention is further described below with reference to specific diagrams.

[0020] like Figures 1 to 4 As shown, This embodiment provides a cooling water flow channel structure of a water-cooling controller for a pure electric vehicle, including: A water-cooling plate 1, wherein a water-cooling seat 2 is integrally provided at the lower end of the water-cooling plate 1, and an IGBT module is mounted on a side of the water-cooling plate 1 away from the water-cooling seat 2, so as to cool the IGBT module through the water-cooling seat 2; The cover plate 3 is mounted on the outer end of the water cooling seat 2 and is fixedly connected to the water cooling seat 2 by a stir friction welding process. The outer end of the cover plate 3 is provided with a water inlet pipe 31 and a water outlet pipe 32 to circulate water in the water cooling seat 2; The water-cooling seat 2 is provided with a main channel 21 connected to the water inlet pipe port 31 and a cooling cavity arranged on one side of the main channel 21. The cooling cavity includes a first cooling channel 22, a second cooling channel 23 and a third cooling channel 24 which are arranged in sequence in layers. The first cooling channel 22 is attached to the water-cooling plate 1 to cool the water-cooling plate 1. One side of the first cooling channel 22 is connected to the main channel 21, and the other side is connected to the water outlet pipe port 32. The second cooling channel 23 is arranged on a side of the first cooling channel 22 away from the water-cooling plate 1. The second cooling channel 23 is connected to the main channel 21 through a branch hole 25. The second cooling channel 23 is connected to the third cooling channel 24 on a side away from the branch hole 25. The water flow directions of the first cooling channel 22 and the second cooling channel 23 are opposite, and the third cooling channel 24 is connected to the water outlet pipe port 32 on the outside.

[0021] Specifically, the structure is provided with two cooling water channels, the first cooling water channel directly cools the water-cooled plate 1, and the other cooling water channel is used to cool the first cooling channel 22 and improve the uniformity of the water temperature of the first cooling water channel. The second cooling channel 23 is used to cool the end of the first cooling channel 22 and reduce the end temperature of the first cooling channel 22, thereby achieving uniformity in cooling the IGBT module by the water-cooled plate 1.

[0022] In this embodiment, heat conducting plates 26 are respectively provided between the first cooling channel 22 and the second cooling channel 23 , and between the second cooling channel 23 and the third cooling channel 24 , and are separated by the heat conducting plates 26 .

[0023] A partition 27 is provided between the main flow channel 21 and the cooling cavity. One side of the main flow channel 21 is connected to the water inlet pipe port 31, and the other side is connected to the first cooling flow channel 22. A guide plate 28 is provided on the side of the main flow channel 21 away from the water inlet pipe port 31 to guide the water flow in the main flow channel 21 into the first cooling flow channel 22. The side of the first cooling flow channel 22 away from the guide plate 28 is connected to the water outlet pipe port 32.

[0024] The water inlet 31 and the water outlet 32 ​​are located on the same side of the water cooling seat 2 . The water outlet 32 ​​is located at the second cooling channel 23 and a sealing pipe 33 is provided so that the second cooling channel 23 is not directly connected to the water outlet 32 ​​.

[0025] In this embodiment, the branch hole 25 is opened at the corresponding position in the middle of the partition 27 to conduct the main flow channel 21 and the second cooling flow channel 23. The main flow channel 21 is provided with a guide column 29 corresponding to the branch hole 25. The guide column 29 is arranged on the side of the main flow channel 21 away from the branch hole 25. The guide column 29 is an arc-shaped structure to push water to flow into the branch hole 25.

[0026] A diverter plate 20 is provided at a corresponding position of the branch hole 25 in the second cooling channel 23 to ensure uniform water flow. A through hole connected to the third cooling channel 24 is provided on the side of the second cooling channel 23 away from the branch hole 25 to guide water flow into the third cooling channel 24. The third cooling channel 24 is connected to the water outlet pipe 32, and the water flow discharged from the sealing pipe 33 also flows into the water outlet pipe 32 through the third cooling channel 24.

[0027] In this embodiment, a plurality of groups of heat-conducting columns 4 are distributed in the first cooling channel 22 and the second cooling channel 23 to increase the contact area with water. One end of the heat-conducting column 4 is fixedly connected to the water-cooling plate 1 to improve the heat exchange efficiency between the water-cooling plate 1 and water.

[0028] In this embodiment, the water cooling plate 1 is mounted on the housing of the controller by means of bolts, and the heat sink at the bottom of the IGBT module 5 is mounted on the water cooling plate 1 and fixed by means of bolts.

[0029] The working principle of the present invention is as follows: the water inlet pipe 31 and the water outlet pipe 32 are externally connected to the shell water channel port, the water inlet pipe 31 supplies cooling water to two cooling water channels through the main channel 21, the first cooling water channel directly cools the water-cooled plate 1, and the other cooling water channel is used to cool the first cooling channel 22, and the water flow direction in the second cooling channel 23 is opposite to that of the first cooling channel 22. Because the end temperature of the first cooling channel 22 is relatively high, the second cooling channel 23 exchanges heat from the end of the first cooling channel 22 to improve the uniformity of the water temperature of the first cooling water channel, so as to avoid uneven cooling of the IGBT module by the water-cooled plate 1, resulting in high local temperature and affecting the performance of the IGBT module.

[0030] The first cooling channel 22, the second cooling channel 23 and the third cooling channel 24 of the device are separated by a heat conducting plate 26. The first cooling channel 22 and the second cooling channel 23 are not connected to avoid turbulence. The second cooling channel 23 uses the reverse flow of cooling water to exchange heat with the first cooling channel 22, thereby improving the uniformity of the water level in the first cooling channel 22 and facilitating heat conduction, thereby reducing the water temperature in the first cooling channel 22, further improving the performance of the first cooling channel 22 in cooling the water-cooled plate 1, solving the problem of heating of the IGBT module, and achieving temperature balance of the IGBT module.

[0031] When the MCU is running, the cooling water coming in from the water channel of the shell circulates through the water channel of the water cooling seat 2, taking away a large amount of heat generated by the operation of the IGBT, so that the IGBT is in a balanced state, that is, a steady state.

[0032] The above shows and describes the basic principle and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents. It should be noted that, in this article, if there are relational terms such as first and second, it is only used to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "includes", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A cooling water channel structure for a water-cooled controller of a pure electric vehicle, characterized in that: include: A water cooling plate, wherein a water cooling seat is integrally provided at the lower end of the water cooling plate, and the IGBT module is mounted on a side of the water cooling plate away from the water cooling seat, so as to cool the IGBT module through the water cooling seat; The cover plate is mounted on the outer end of the water cooling seat and is fixedly connected to the water cooling seat by a stir friction welding process. The outer end of the cover plate is provided with a water inlet and a water outlet to circulate water in the water cooling seat; The water-cooling seat is provided with a main flow channel connected to a water inlet pipe port and a cooling cavity arranged on one side of the main flow channel. The cooling cavity includes a first cooling flow channel, a second cooling flow channel and a third cooling flow channel which are arranged in sequence in layers. The first cooling flow channel is attached to the water-cooling plate to cool the water-cooling plate. One side of the first cooling flow channel is connected to the main flow channel, and the other side is connected to the water outlet pipe port. The second cooling flow channel is arranged on a side of the first cooling flow channel away from the water-cooling plate. The second cooling flow channel is connected to the main flow channel through a branch hole. The side of the second cooling flow channel away from the branch hole is connected to the third cooling flow channel. The water flow directions of the first cooling flow channel and the second cooling flow channel are opposite, and the third cooling flow channel is connected to the water outlet pipe port outside.

2. The cooling water channel structure of a water-cooled controller for a pure electric vehicle according to claim 1, characterized in that: A heat conduction plate is provided between the first cooling channel and the second cooling channel, and between the second cooling channel and the third cooling channel, respectively, and the channels are separated by the heat conduction plate.

3. The cooling water flow channel structure of a water-cooled controller for a pure electric vehicle according to claim 2, characterized in that: A partition is provided between the main flow channel and the cooling cavity, one side of the main flow channel is connected to the water inlet pipe port, and the other side is connected to the first cooling flow channel, and a guide plate is provided on the side of the main flow channel away from the water inlet pipe port to guide the water flow in the main flow channel into the first cooling flow channel, and the side of the first cooling flow channel away from the guide plate is connected to the water outlet pipe port.

4. The cooling water flow channel structure of a water-cooled controller for a pure electric vehicle according to claim 3, characterized in that: The water inlet and outlet are located on the same side of the water cooling seat, and the water outlet is located at the second cooling channel and a sealing pipe is provided so that the second cooling channel is not directly connected to the water outlet.

5. The cooling water flow channel structure of a water-cooled controller for a pure electric vehicle according to claim 1, characterized in that: The branch holes are opened at corresponding positions in the middle of the partition to connect the main flow channel and the second cooling flow channel. The main flow channel is provided with a guide column corresponding to the branch hole. The guide column is arranged on the side of the main flow channel away from the branch hole. The guide column is an arc structure to push water to flow into the branch hole.

6. The cooling water flow channel structure of a water-cooled controller for a pure electric vehicle according to claim 5, characterized in that: A diverter plate is provided at a corresponding position of the branch hole in the second cooling channel to ensure uniform water flow. A through hole connected to the third cooling channel is provided on the side of the second cooling channel away from the branch hole to guide the water flow into the third cooling channel. The third cooling channel is connected to the water outlet pipe, and the water flow discharged from the sealed pipe also flows into the water outlet pipe through the third cooling channel.

7. The cooling water flow channel structure of a water-cooled controller for a pure electric vehicle according to claim 1, characterized in that: A plurality of groups of heat-conducting columns are distributed in the first cooling channel and the second cooling channel to increase the contact area with water. One end of the heat-conducting column is fixedly connected to the water-cooling plate to improve the heat exchange efficiency between the water-cooling plate and water.

8. The cooling water flow channel structure of a water-cooled controller for a pure electric vehicle according to claim 1, characterized in that: The water cooling plate is mounted on the housing of the controller by means of bolts, and the heat sink at the bottom of the IGBT module is mounted on the water cooling plate and fixed by means of bolts.

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