A cooling plate, a controller and a motor drive system

Abstract

The utility model discloses a kind of cooling plate, comprising: mainboard, including multiple cooling cavities being spaced apart along first direction and not interconnected;Water inlet pipe, extend along first direction, water inlet pipe is located in the second direction of mainboard one side and is connected with mainboard;Water inlet pipe includes water inlet and multiple water distribution parts being interconnected, multiple water distribution parts are spaced apart along first direction, each water distribution part is interconnected along second direction one cooling cavity;Water outlet pipe, extend along first direction, water outlet pipe is located in the second direction of mainboard other side and is connected with mainboard;Water outlet pipe includes water outlet and multiple water outlet parts being interconnected, multiple water outlet parts are spaced apart along first direction, each water outlet part is interconnected along second direction one cooling cavity;First direction and second direction intersect.The utility model can realize balanced cooling to multiple half-bridge modules, to improve module performance.The utility model further provides a kind of controller and motor drive system.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and in particular to a cooling plate, controller and motor drive system. Background Technology

[0002] In modern industry and transportation, motor controllers are key components, and their performance and reliability directly affect the operating efficiency and stability of the entire system.

[0003] As a core power component in the motor controller, the half-bridge module generates a significant amount of heat during operation. Therefore, the design of the cooling system is crucial to ensure stable operation of the half-bridge module within a suitable temperature range. Currently, a common cooling method is to use a series water cooling system with three half-bridge modules connected in series.

[0004] In this series-connected water cooling scheme, the coolant flows sequentially through three half-bridge modules, carrying away the heat generated by the modules. However, in practical applications, a significant drawback has been found. As the coolant flows through the first half-bridge module, it absorbs the heat generated by the module, causing its own temperature to rise. As the coolant continues to flow to the second and third half-bridge modules, its cooling capacity gradually decreases. This inevitably leads to a temperature difference between the three half-bridge modules. The first half-bridge module, due to contact with the relatively cooler coolant, experiences better heat dissipation and a relatively lower temperature; while subsequent half-bridge modules, due to the increased coolant temperature, experience poorer heat dissipation and their temperatures gradually rise. This temperature difference significantly impacts the performance of the half-bridge modules.

[0005] For dual-motor controllers, the drawbacks of this series water cooling scheme are even more pronounced. Dual-motor controllers typically need to control the operation of two motors simultaneously, resulting in a more complex workload and heat generation. With series water cooling, the temperature differences between the half-bridge modules are further amplified. Different temperatures cause changes in the electrical performance of the half-bridge modules, such as on-resistance and switching speed. This leads to performance differences between the individual half-bridge modules, thereby affecting the overall performance and control accuracy of the dual-motor controller. Utility Model Content

[0006] The purpose of this invention is to solve the problem of temperature differences between multiple half-bridge modules when using series water cooling, leading to performance variations. This invention provides a cooling plate, controller, and motor drive system that achieves balanced cooling of multiple half-bridge modules, thereby improving module performance.

[0007] To solve the above-mentioned technical problems, this utility model discloses a cooling plate, comprising: a main board including a plurality of cooling cavities spaced apart along a first direction and not interconnected, the cooling cavities being used to accommodate heat dissipation fins of heat-generating components; a water inlet pipe extending along the first direction, the water inlet pipe being located on one side of the main board in a second direction and connected to the main board; the water inlet pipe including a connected water inlet and a plurality of water distribution sections, the plurality of water distribution sections being spaced apart along the first direction, each of the water distribution sections being connected to one of the cooling cavities in the second direction; and a water outlet pipe extending along the first direction, the water outlet pipe being located on the other side of the main board in the second direction and connected to the main board; the water outlet pipe including a connected water outlet and a plurality of water outlet sections, the plurality of water outlet sections being spaced apart along the first direction, each of the water outlet sections being connected to one of the cooling cavities in the second direction; the first direction and the second direction intersect.

[0008] Using the above technical solution, taking a half-bridge module as an example, the heat dissipation fins of each half-bridge module are located in the cooling cavity of its corresponding motherboard. The inlet pipe extends along the first direction, allowing the coolant entering the inlet pipe from the inlet to flow along the first direction and simultaneously flow into the cooling cavity from the water distribution section. The coolant flowing into the cooling cavity from the water distribution section contacts the heat dissipation fins in the cooling cavity to carry away its heat, and then flows out of the cooling cavity from the corresponding outlet section, enters the outlet pipe, and finally flows out from the outlet. Each water distribution section and water outlet section is connected to a cooling chamber along the second direction, and multiple water distribution sections and multiple water outlet sections are spaced apart along the first direction. This means that as the coolant in the inlet pipe flows in the first direction, it will flow through each water distribution section in sequence and be divided at each water distribution section. That is, part of the coolant continues to flow along the first direction, and part of the coolant flows into the cooling chamber from the water distribution section, takes away the heat of the heat dissipation fins in the cooling chamber, and then flows into the outlet pipe from the water outlet section. Correspondingly, the coolant flowing out of each water outlet section is collected in the outlet pipe and flows to the outlet.

[0009] In summary, compared to the existing series water circuit with multiple interconnected cooling chambers, this embodiment adopts a parallel water circuit. Multiple cooling chambers are spaced apart along the first direction and are not interconnected. Since there is a main water inlet pipe and multiple water distribution sections, the coolant flowing into each cooling chamber has not entered the previous cooling chamber. The temperature difference between the coolants entering each cooling chamber is small and close to the initial temperature of the inlet. This enables balanced and efficient cooling of each half-bridge module, thereby improving the performance of the half-bridge module.

[0010] According to another specific embodiment of the present invention, each of the water distribution parts includes multiple water distribution holes, and each of the water outlet parts includes multiple water outlet holes, wherein the multiple water distribution holes correspond one-to-one with the multiple water outlet holes.

[0011] Using the above technical solution, the coolant in the inlet pipe flows into its corresponding cooling chamber through multiple water distribution holes, and the coolant in the cooling chamber flows into the outlet pipe through its corresponding multiple water outlet holes.

[0012] According to another specific embodiment of the present invention, along the flow direction of the coolant in the water inlet pipe, the total cross-sectional area of ​​the multiple water distribution holes in the upstream water distribution section of two adjacent water distribution sections is smaller than the total cross-sectional area of ​​the multiple water distribution holes in the downstream water distribution section.

[0013] By adopting the above technical solution, the coolant flow rate of different water distribution sections can be adjusted to ensure that the coolant flow rate of each water distribution section is relatively balanced, so that each cooling chamber can obtain a suitable cooling effect and avoid the problem of uneven cooling in individual cooling chambers due to excessive or insufficient coolant flow rate.

[0014] According to another specific embodiment of the present invention, the motherboard has a plurality of first connection holes and a plurality of second connection holes on both sides in the second direction. The plurality of first connection holes correspond one-to-one with the plurality of water distribution parts. Each first connection hole covers the plurality of water distribution holes of its corresponding water distribution part to connect the cooling cavity and the water inlet pipe. The plurality of second connection holes correspond one-to-one with the plurality of water outlet parts. Each second connection hole covers the plurality of water outlet holes of its corresponding water outlet part to connect the cooling cavity and the water outlet pipe.

[0015] Using the above technical solution, the coolant in the inlet pipe can flow sequentially through the water distribution hole and the first connecting hole, thereby entering the cooling chamber. The coolant in the cooling chamber can flow sequentially through the second connecting hole and the outlet hole, thereby entering the outlet pipe.

[0016] According to another specific embodiment of the present invention, the water inlet and the water outlet are located on the same side or opposite sides of the motherboard in a first direction.

[0017] According to another specific embodiment of this utility model, the main board is an extruded aluminum cold plate.

[0018] Using the above technical solution, the motherboard is made of extruded aluminum cold plate, which has a simple structure and low cost.

[0019] The present invention also discloses a controller for a cooling plate based on any of the above embodiments, comprising: a power module including multiple heating elements, each of the heating elements including heat dissipation fins; the cooling plate having multiple cooling cavities corresponding one-to-one with the multiple heating elements, each cooling cavity having an opening at its upper end, each heating element covering the upper opening of its corresponding cooling cavity and being fixedly connected to the main board, and the heat dissipation fins of each heating element extending into its corresponding cooling cavity.

[0020] According to another specific embodiment of the present invention, the heating element is a half-bridge module; the controller includes one power module and one cooling plate, the power module includes three half-bridge modules, and the cooling plate includes three cooling cavities.

[0021] Using the above technical solution, the three half-bridge modules correspond to three cooling chambers. During the flow of coolant in the inlet pipe, it is split at each water distribution point and flows into the corresponding cooling chamber to perform convective heat exchange on the heat dissipation fins of the half-bridge modules in the cooling chamber. As it flows to the outlet pipe, it carries away heat and achieves heat dissipation and cooling.

[0022] According to another specific embodiment of the present invention, the controller includes two power modules and two cooling plates, the water inlet pipes of the two cooling plates are interconnected, and the water outlet pipes of the two cooling plates are interconnected.

[0023] Using the above technical solution, each power module includes three half-bridge modules, and each cooling plate includes three cooling chambers. Thus, the six half-bridge modules correspond to six cooling chambers. During the flow of coolant in the two inlet pipes of the two cooling plates, the coolant is split at each water distribution point and flows into the corresponding cooling chamber to perform convective heat exchange on the heat dissipation fins of the half-bridge modules in the cooling chamber. The coolant carries away heat during the flow to the outlet pipe, thereby achieving heat dissipation and cooling.

[0024] According to another specific embodiment of the present invention, the water inlet pipes of the two cooling plates are connected to each other through a rubber joint, and the water outlet pipes of the two cooling plates are connected to each other through a rubber joint.

[0025] The present invention also discloses a motor drive system based on a controller according to any of the above embodiments, comprising: a motor; and the controller described above, wherein the controller is connected to the motor.

[0026] Using the above technical solution, the controller is connected to the motor to control the motor's operating status. Attached Figure Description

[0027] Figure 1 This is a perspective view showing a power module and a cooling plate connected according to an embodiment of the present invention;

[0028] Figure 2 This is a perspective view showing the connection between two power modules and two cooling plates according to an embodiment of the present invention;

[0029] Figure 3 A perspective view of the power module according to an embodiment of the present invention is shown;

[0030] Figure 4 A perspective view of the cooling plate according to an embodiment of the present invention is shown;

[0031] Figure 5 Show Figure 1 A three-dimensional sectional view;

[0032] Figure 6 This is an exploded perspective view of the cooling plate according to an embodiment of the present invention;

[0033] Figure 7 A schematic diagram showing the flow direction of coolant within the cooling plate according to an embodiment of the present invention. Figure 1 The inlet and outlet are located on the same side of the motherboard.

[0034] Figure 8 A schematic diagram showing the flow direction of coolant within the cooling plate according to an embodiment of the present invention. Figure 2 The inlet and outlet are located on opposite sides of the motherboard.

[0035] Figure 9 This is a perspective view showing the connection of two cooling plates in an embodiment of the present invention;

[0036] Figure 10 A perspective view of a rubber joint according to an embodiment of the present invention is shown. Detailed Implementation

[0037] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0038] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this embodiment, it should be noted that the terms "upper," "lower," "inner," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0040] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0041] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0043] This application provides a motor drive system, including a motor and a controller connected to each other, wherein the controller is used to control the operating state of the motor.

[0044] refer to Figure 1 The controller mentioned above includes a power module 100 and a cooling plate 200. The power module 100 generates a lot of heat during operation, and the cooling plate 200 is used to dissipate heat and cool the power module 100.

[0045] It is understandable that, such as Figure 1 As shown, when the motor drive system includes one motor, its controller is a single-motor controller, which has a power module 100. Correspondingly, as... Figure 2 As shown, when the motor drive system includes two motors, its controller is a dual-motor controller, which has two power modules 100.

[0046] This embodiment will first be explained using a single-motor controller as an example.

[0047] like Figure 1 and Figure 3As shown, the controller is a single-motor controller, which has a power module 100. The power module 100 includes three half-bridge modules 101, and each half-bridge module 101 includes heat dissipation fins 102.

[0048] refer to Figures 3 to 5 The aforementioned cooling plate 200 includes a main board 300, an inlet pipe 400, and an outlet pipe 500. The main board 300 includes a plurality of cooling cavities 301 that are spaced apart along the first direction X and are not interconnected. Each cooling cavity 301 is used to accommodate the heat dissipation fins 102 of the half-bridge module 101 (also referred to as a heat-generating component).

[0049] For example, the cooling cavity 301 is a recess provided on the motherboard 300. The motherboard 300 includes a partition 302 located between two adjacent cooling cavities 301, so that the two adjacent cooling cavities 301 are not connected to each other, thereby forming a parallel water channel.

[0050] This embodiment has three cooling chambers 301, which correspond one-to-one with three half-bridge modules 101. Each cooling chamber 301 has an open upper end and a closed lower end. Each half-bridge module 101 covers the upper opening of its corresponding cooling chamber 301 and is fixedly connected to the motherboard 300. The heat dissipation fins 102 of each half-bridge module 101 extend into its corresponding cooling chamber 301.

[0051] For example, the half-bridge module 101 and the motherboard 300 are connected by screws. The motherboard 300 is an extruded aluminum cold plate, which has a simple structure and low cost.

[0052] like Figure 4 and Figure 6 As shown, the water inlet pipe 400 extends along the first direction X, and is located on one side of the motherboard 300 in the second direction Y and connected to the motherboard 300. Exemplarily, the water inlet pipe 400 is bonded or soldered to the motherboard 300.

[0053] The water inlet pipe 400 includes a connected water inlet 401 and multiple water distribution sections 402. The multiple water distribution sections 402 are spaced apart along a first direction X, and each water distribution section 402 is connected to a cooling chamber 301 along a second direction Y. In this embodiment, three cooling chambers 301 are provided with three water distribution sections 402 to ensure that they correspond one-to-one.

[0054] For example, as the coolant enters the inlet pipe 400 from the inlet 401 and flows in the first direction X, it will flow through three water distribution sections 402 in sequence. When it flows through the first two water distribution sections 402, it will be split, that is, a part of the coolant will continue to flow in the first direction X, and a part of the coolant will flow into the corresponding connected cooling chamber 301 through the water distribution section 402. All the coolant in the last water distribution section 402 will flow into the corresponding cooling chamber 301, so that the coolant contacts the heat dissipation fins 102 in the cooling chamber 301 and forms convective heat transfer.

[0055] The aforementioned water outlet pipe 500 extends along the first direction X, and is located on the other side of the motherboard 300 in the second direction Y and connected to the motherboard 300. For example, the water outlet pipe 500 is bonded or soldered to the motherboard 300.

[0056] The water outlet pipe 500 includes a connected water outlet 501 and multiple water outlet sections 502. The multiple water outlet sections 502 are spaced apart along a first direction X, and each water outlet section 502 is connected to a cooling chamber 301 along a second direction Y. The first direction X and the second direction Y intersect. Therefore, corresponding to the three cooling chambers 301 and the three water distribution sections 402 in this embodiment, three water outlet sections 502 are provided to ensure that they correspond one-to-one.

[0057] The coolant in the three cooling chambers 301 contacts the heat dissipation fins 102 inside each chamber, forming convective heat transfer. Afterward, it flows through its corresponding outlet 502 to the outlet pipe 500, where it converges and finally flows out from the outlet 501. During this process, the coolant contacts the heat dissipation fins 102 in the cooling chamber 301 and then flows out, thereby carrying away the heat from the heat dissipation fins 102 and thus cooling the half-bridge module 101.

[0058] In this embodiment, the motherboard 300 is rectangular, with the first direction X being its length direction and the second direction Y being its width direction; that is, the first direction X and the second direction Y are perpendicular in this embodiment. The aforementioned inlet pipe 400 and outlet pipe 500 are arranged parallel to each other and are located on opposite sides of the motherboard 300 in the second direction Y. However, those skilled in the art will understand that in other embodiments, the first direction X and the second direction Y may intersect at other angles, such as 85°, 80°, etc.

[0059] refer to Figures 4 to 6Using the above technical solution, the heat dissipation fins 102 of each half-bridge module 101 are located in its corresponding cooling cavity 301. The water inlet pipe 400 extends along the first direction X. As the coolant enters the water inlet pipe 400 from the water inlet 401 and flows in the first direction X, it will flow through three water distribution sections 402 in sequence. When flowing through the first two water distribution sections 402, the flow is split, that is, part of the coolant continues to flow in the first direction X, and part of the coolant flows into the corresponding connected cooling cavity 301 through the water distribution section 402. The coolant in the last water distribution section 402 flows into the corresponding cooling cavity 301, so that the coolant contacts the heat dissipation fins 102 in the cooling cavity 301 and forms convective heat transfer.

[0060] The coolant in the three cooling chambers 301 contacts the heat dissipation fins 102 within the cooling chambers 301, forming convective heat transfer. Afterward, it flows through its respective outlet 502 to the outlet pipe 500, where it converges and finally flows out from the outlet 501. During this process, the coolant flows out after contacting the heat dissipation fins 102 in the cooling chambers 301, thereby carrying away the heat from the heat dissipation fins 102 and thus cooling the half-bridge module 101.

[0061] In summary, compared to the existing series water circuit with multiple interconnected cooling chambers 301, this embodiment adopts a parallel water circuit. The multiple cooling chambers 301 are spaced apart along the first direction X and are not interconnected. Since a total water inlet pipe 400 and multiple water distribution sections 402 are provided, the coolant flowing into each cooling chamber 301 has not entered the previous cooling chamber 301. The temperature difference between the coolants entering each cooling chamber 301 is small and close to the initial temperature of the inlet 401. This enables balanced and efficient cooling of each half-bridge module 101, thereby improving the performance of the half-bridge module 101.

[0062] In this embodiment, as Figure 6 As shown, each water distribution section 402 includes multiple water distribution holes 403, and each water outlet section 502 includes multiple water outlet holes 503. The multiple water distribution holes 403 correspond one-to-one with the multiple water outlet holes 503. That is, the coolant in the water inlet pipe 400 flows into its corresponding cooling chamber 301 through the multiple water distribution holes 403, and the coolant in the cooling chamber 301 flows into the water outlet pipe 500 through its corresponding multiple water outlet holes 503.

[0063] For example, both the water distribution hole 403 and the water outlet hole 503 are circular. However, those skilled in the art will understand that in other embodiments, the water distribution hole 403 and the water outlet hole 503 may also be other shapes, such as rectangular, polygonal, etc., and the shapes of the water distribution hole 403 and the water outlet hole 503 may be the same or different.

[0064] like Figure 6As shown, along the coolant flow direction M in the inlet pipe 400, the total cross-sectional area of ​​the multiple water distribution holes 403 in the upstream water distribution section 402 of two adjacent water distribution sections 402 is smaller than the total cross-sectional area of ​​the multiple water distribution holes 403 in the downstream water distribution section 402.

[0065] Specifically, with Figure 6 Taking the three water distribution sections 402 shown as first water distribution section 402a, second water distribution section 402b, and third water distribution section 402c, starting from the inlet 401, in the coolant flow direction M within the inlet pipe 400, the first water distribution section 402a is upstream of the second water distribution section 402b, and the second water distribution section 402b is downstream. Correspondingly, the second water distribution section 402b is upstream of the third water distribution section 402c, and the third water distribution section 402c is downstream. In other words, the total cross-sectional area of ​​the multiple water distribution holes 403 in the first water distribution section 402a, second water distribution section 402b, and third water distribution section 402c, from smallest to largest, is: first water distribution section 402a, second water distribution section 402b, and third water distribution section 402c.

[0066] It is understandable that when coolant flows into the inlet pipe 400, the pressure near the inlet 401 is relatively high. If the total cross-sectional area of ​​the water distribution holes 403 in each water distribution section 402 is the same, then the first water distribution section 402a, which is closer to the inlet 401, will receive too much coolant due to the high pressure, while the third water distribution section 402c, which is farther from the inlet 401, will receive insufficient coolant due to pressure loss. By setting the total cross-sectional area of ​​the multiple water distribution holes 403 in the upstream water distribution section 402 of two adjacent water distribution sections 402 to be smaller than that in the downstream water distribution section 402, the coolant flow rate of different water distribution sections 402 can be adjusted to ensure that the coolant flow rate from each water distribution section 402 is relatively balanced, so that each cooling chamber 301 can receive a suitable cooling effect, avoiding uneven cooling in individual cooling chambers 301 due to excessive or insufficient coolant flow.

[0067] Specifically, in this embodiment, to ensure a relatively balanced flow of coolant from the three water distribution sections 402, the cross-sectional area of ​​each individual water distribution hole 403 in each water distribution section 402 is set to be the same. However, the number of water distribution holes 403 in the upstream water distribution section 402 is increased by the number of water distribution holes 403 in the downstream water distribution section 402. For example, the first water distribution section 402a adjacent to the inlet 401 has 4 water distribution holes 403. Furthermore, the second water distribution section 402b located downstream has 5 water distribution holes 403, and the third water distribution section 402c, which is adjacent to the second water distribution section 402b and located downstream, has 6 water distribution holes 403. This ensures that the total cross-sectional area of ​​the water distribution holes 403 of each water distribution section 402 gradually increases in the coolant flow direction M within the inlet pipe 400. This is to compensate for the problem of insufficient coolant inflow caused by pressure loss in the water distribution section 402 far from the inlet 401.

[0068] In the above embodiment, the total cross-sectional area of ​​the multiple water distribution holes 403 in each water distribution section 402 gradually increases in the direction of coolant flow M within the inlet pipe 400 by increasing the number of water distribution holes 403 in the downstream water distribution section 402, while ensuring that the individual water distribution holes 403 of each water distribution section 402 have the same cross-sectional area. However, those skilled in the art will understand that in other embodiments, the total cross-sectional area of ​​the water distribution holes 403 in each water distribution section 402 can also gradually increase in the direction of coolant flow M within the inlet pipe 400 by other means. For example, while keeping the number of water distribution holes 403 in each water distribution section 402 constant, the cross-sectional area of ​​each water distribution hole 403 in the downstream water distribution section 402 can be made larger than that in the upstream water distribution section 402, thereby also achieving the gradual increase of the total cross-sectional area of ​​the water distribution holes 403 in the direction of coolant flow M within the inlet pipe 400. Alternatively, the number of water distribution holes 403 and the cross-sectional area of ​​each water distribution hole 403 can be adjusted simultaneously to achieve a gradual increase in the total cross-sectional area of ​​the water distribution holes 403 of each water distribution section 402 in the coolant flow direction M within the water inlet pipe 400.

[0069] In this embodiment, the water outlet 503 of each water outlet section 502 corresponds one-to-one with the water distribution hole 403 of each water distribution section 402 along the second direction Y, and their cross-sectional areas are the same.

[0070] Continue to refer to Figure 6The motherboard 300 has multiple first connection holes 303 and multiple second connection holes 304 on both sides of the second direction Y. The multiple first connection holes 303 correspond one-to-one with multiple water distribution parts 402. Each first connection hole 303 covers multiple water distribution holes 403 of its corresponding water distribution part 402 to connect the cooling chamber 301 and the water inlet pipe 400. The coolant in the water inlet pipe 400 can flow through the water distribution holes 403 and the first connection holes 303 in sequence, and then enter the cooling chamber 301.

[0071] For example, the first connecting hole 303 is rectangular, covering multiple circular water distribution holes 403 of its corresponding water distribution section 402 to connect the cooling chamber 301 and the water inlet pipe 400. It is understood that, compared to providing multiple first connecting holes 303 that correspond one-to-one with multiple water distribution holes 403, this implementation where one first connecting hole 303 covers multiple water distribution holes 403 reduces the assembly difficulty of the motherboard 300 and the water inlet pipe 400, and also reduces the production requirements of the motherboard 300.

[0072] Correspondingly, multiple second connecting holes 304 and multiple water outlets 502 are one-to-one. Each second connecting hole 304 covers multiple water outlets 503 of its corresponding water outlet 502 to connect the cooling chamber 301 and the water outlet pipe 500. The coolant in the cooling chamber 301 can flow through the second connecting holes 304 and the water outlets 503 in sequence and then enter the water outlet pipe 500.

[0073] For example, similar to the first connecting hole 303, the second connecting hole 304 is also rectangular, covering the multiple circular water outlet holes 503 of its corresponding water outlet portion 502 to connect the cooling chamber 301 and the water outlet pipe 500. It is understood that, compared to providing multiple second connecting holes 304 corresponding one-to-one with multiple water outlet holes 503, this implementation where one second connecting hole 304 covers multiple water outlet holes 503 reduces the assembly difficulty of the motherboard 300 and the water outlet pipe 500, and also reduces the production requirements of the motherboard 300.

[0074] In this embodiment, the first connection hole 303 and the second connection hole 304 of the motherboard 300 are symmetrically arranged, that is, the two are connected to each other in the second direction Y.

[0075] Continue to refer to Figure 6 In this embodiment, along the first direction X, the water inlet pipe 400 includes a first end 410 and a second end 420, the first end 410 having a water inlet 401 and the second end 420 being closed; the water outlet pipe 500 includes a third end 510 and a fourth end 520, the third end 510 having a water outlet 501 and the fourth end 520 being closed; the first end 410 and the third end 510 are located on the same side of the main board 300 in the first direction X (e.g., Figure 6 and Figure 7 (as shown) or the opposite side (such as) Figure 8 As shown in the figure, that is, the inlet 401 and the outlet 501 are located on the same side or opposite side of the first direction X of the main board 300.

[0076] For example, such as Figure 7 As shown, the first end 410 of the inlet pipe 400 is connected to a water pipe connector 600, which allows the water pipe connector to connect to a coolant supply pipe (not shown in the figure), thus supplying coolant to the inlet pipe 400. The second end 420 of the inlet pipe 400 is sealed by a plug 700 to prevent coolant from flowing out of the second end 420. Correspondingly, the third end 510 of the outlet pipe 500 is connected to a water pipe connector 601, which allows the water pipe connector 601 to connect to a coolant outlet pipe (not shown in the figure). The fourth end 520 of the outlet pipe 500 is sealed by a plug 701 to prevent coolant from flowing out of the fourth end 520.

[0077] In this embodiment, as Figure 7 As shown, the first end 410 and the third end 510 are located on the same side of the motherboard 300 in the first direction X, that is, the water inlet 401 and the water outlet 501 are located on the same side of the motherboard 300 in the first direction X, and the coolant enters and exits from the same side of the motherboard 300.

[0078] In other embodiments, such as Figure 8 As shown, the first end 410 and the third end 510 are located on opposite sides of the first direction X of the motherboard 300, that is, the water inlet 401 and the water outlet 501 are located on opposite sides of the first direction X of the motherboard 300, and the coolant enters and exits from the opposite side of the motherboard 300.

[0079] That is, the positions of the inlet 401 and the outlet 501 in this embodiment can be flexibly adjusted as needed.

[0080] The above text details the structure of the cooling plate 200 corresponding to the three half-bridge modules 101 of the single-motor controller. It can be understood that, as... Figure 2 and Figure 9 As shown, the dual-motor controller has the two power modules 100 mentioned above, which are also six half-bridge modules 101. Each power module 100 has three half-bridge modules 101 corresponding to one cooling plate 200 with three cooling chambers 301. Therefore, the dual-motor controller includes two cooling plates 200. The inlet pipes 400 of the two cooling plates 200 are interconnected, and the outlet pipes 500 of the two cooling plates 200 are interconnected. That is, the two cooling plates 200 have a total of six cooling chambers 301, and each of the six cooling chambers 301 corresponds one-to-one with one of the six half-bridge modules 101.

[0081] Specifically, such as Figure 9 and Figure 10As shown, the two adjacent ends of the two inlet pipes 400 of the two cooling plates 200 are connected by rubber joints 800. The other two distal ends are inlet 401 and a first closed end 404, respectively. The inlet 401 is connected to a water pipe connector (not shown in the figure) so that the water pipe connector can be connected to a coolant supply pipe (not shown in the figure) to supply coolant to the inlet pipe 400. The first closed end 404 is closed by a plug (not shown in the figure). Correspondingly, the two adjacent ends of the two outlet pipes 500 of the two cooling plates 200 are connected by rubber joints 801. The other two distal ends are outlet 501 and a second closed end 504, respectively. The outlet 501 is connected to a water pipe connector (not shown in the figure) so that the water pipe connector can be connected to a coolant output pipe. The second closed end 504 is closed by a plug (not shown in the figure).

[0082] refer to Figure 2 and Figure 9 The coolant entering through inlet 401 first flows within the preceding inlet pipe 400, and then sequentially flows through the three water distribution sections 402 (see reference). Figure 7 At each of the water distribution sections 402, the coolant is diverted, meaning that a portion of the coolant flows from the water distribution section 402 to the corresponding cooling chamber 301, while the other portion continues to flow forward within the inlet pipe 400. After flowing through three water distribution sections 402, the coolant flows into the next inlet pipe 400 and sequentially through the three water distribution sections 402 of that inlet pipe 400. At the first two water distribution sections 402, the coolant is diverted, meaning that a portion of the coolant flows from the water distribution section 402 to the corresponding cooling chamber 301, while the other portion continues to flow forward within the inlet pipe 400. At the last water distribution section 402, all the coolant flows into its corresponding cooling chamber 301. Coolant flows through all six cooling chambers 301 to achieve heat exchange with the half-bridge module 101 inside. The coolant in the six cooling chambers 301 flows into the outlet pipe 500 from their respective outlets 502. The two connected outlet pipes 500 collect the coolant and finally it flows out from the outlet 501.

[0083] In this embodiment, the cooling plate 200 of the dual-motor controller includes the two cooling plates 200 described above, each with three cooling chambers 301, which are simple to assemble and have a compact structure. However, those skilled in the art will understand that in other embodiments, a single cooling plate 200 with six cooling chambers 301 can also be directly provided.

[0084] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A cooling plate, characterized in that, include: The motherboard includes a plurality of cooling cavities spaced apart along a first direction and not connected to each other, the cooling cavities being used to accommodate heat dissipation fins of heat-generating components; A water inlet pipe extends along the first direction, and the water inlet pipe is located on one side of the motherboard in the second direction and connected to the motherboard; the water inlet pipe includes a connected water inlet and a plurality of water distribution sections, the plurality of water distribution sections are spaced apart along the first direction, and each water distribution section is connected to a cooling cavity in the second direction. A water outlet pipe extends along the first direction and is located on the other side of the motherboard in the second direction and connected to the motherboard; the water outlet pipe includes a connected water outlet and multiple water outlets, the multiple water outlets are spaced apart along the first direction, and each water outlet is connected to a cooling cavity in the second direction; the first direction and the second direction intersect.

2. The cooling plate as described in claim 1, characterized in that, Each of the water distribution sections includes multiple water distribution holes, and each of the water outlet sections includes multiple water outlet holes, with each of the multiple water distribution holes corresponding to the multiple water outlet holes.

3. The cooling plate as described in claim 2, characterized in that, Along the flow direction of the coolant in the inlet pipe, the total cross-sectional area of ​​the multiple water distribution holes in the upstream water distribution section of two adjacent water distribution sections is smaller than the total cross-sectional area of ​​the multiple water distribution holes in the downstream water distribution section.

4. The cooling plate as described in claim 2, characterized in that, The motherboard has multiple first connection holes and multiple second connection holes on both sides in the second direction. The multiple first connection holes correspond one-to-one with the multiple water distribution parts. Each first connection hole covers the multiple water distribution holes of its corresponding water distribution part to connect the cooling cavity and the water inlet pipe. The multiple second connection holes correspond one-to-one with the multiple water outlet parts. Each second connection hole covers the multiple water outlet holes of its corresponding water outlet part to connect the cooling cavity and the water outlet pipe.

5. The cooling plate as described in claim 4, characterized in that, The inlet and the outlet are located on the same side or opposite sides of the main board in a first direction.

6. The cooling plate as described in claim 1, characterized in that, The motherboard is an extruded aluminum cold plate.

7. A controller, characterized in that, include: A power module includes multiple heating elements, each of which includes heat dissipation fins; The cooling plate according to any one of claims 1 to 6, wherein a plurality of cooling cavities correspond one-to-one with the plurality of heating elements, each cooling cavity has an opening at its upper end, each heating element covers the upper opening of its corresponding cooling cavity and is fixedly connected to the main board, and the heat dissipation fins of each heating element extend into its corresponding cooling cavity.

8. The controller as claimed in claim 7, characterized in that, The heating element is a half-bridge module; the controller includes one power module and one cooling plate, the power module includes three half-bridge modules, and the cooling plate includes three cooling cavities.

9. The controller as described in claim 7, characterized in that, The controller includes two power modules and two cooling plates, with the inlet pipes of the two cooling plates connected to each other and the outlet pipes of the two cooling plates connected to each other.

10. The controller as claimed in claim 9, characterized in that, The water inlet pipes of the two cooling plates are connected to each other through a rubber joint, and the water outlet pipes of the two cooling plates are connected to each other through a rubber joint.

11. A motor drive system, characterized in that, include: Electric motor; as well as The controller according to any one of claims 7-10, wherein the controller is connected to the motor.

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