Annular parallel water channel, dual-motor driving controller and vehicle

Abstract

The invention provides an annular parallel water channel, a dual-motor driving controller and a vehicle, the annular parallel water channel comprises a cubic water cooling water channel shell, and the water cooling water channel shell comprises a first water cooling body, a second water cooling body, a third water cooling body and a fourth water cooling body; wherein the first water cooling body is opposite to the second water cooling body; the third water cooling body is opposite to the fourth water cooling body; the third water cooling body is provided with a water inlet, and the fourth water cooling body is provided with a water outlet; the water-cooling water channel on the first water-cooling body and the water-cooling water channel on the second water-cooling body form a parallel annular water channel, so that the heat dissipation area is increased, and the heat dissipation efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an annular parallel waterway, a dual-motor drive controller and a vehicle. Background Art

[0002] With the rapid development of vehicle technology, the popularity of vehicles is increasing day by day, and market recognition is also increasing. Due to its green and energy-saving characteristics, vehicles are developing in a trend of lightweight, integration, and miniaturization in order to improve their energy efficiency and increase their mileage. However, as the functions of vehicles increase, the size of their electric drive systems is getting larger and larger. At the same time, due to the relatively small space of the vehicle, the space inside the cabin is greatly limited. Therefore, the electric drive system is constantly developing in the direction of all-in-one integration. At the same time, the heat dissipation design of the power components also needs to be improved synchronously.

[0003] In view of this, this application is hereby filed. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a ring-shaped parallel water channel, a dual-motor drive controller and a vehicle. By setting up a ring-shaped parallel water channel, the area and heat dissipation efficiency of the heat dissipation area are increased, so that high-loss and high-power devices such as the power modules and supporting capacitors of the dual inverters can be better cooled, thereby improving the current balance of the inverter power modules and the robustness of the supporting capacitors, and being able to better adapt to the increasingly cramped vehicle space and improve space utilization.

[0005] Based on the above purpose, in a first aspect, the present invention provides an annular parallel water channel, comprising a water-cooling water channel housing in a cubic shape, wherein the water-cooling water channel housing comprises a first water-cooling body, a second water-cooling body, a third water-cooling body and a fourth water-cooling body;

[0006] The first water-cooling body is opposite to the second water-cooling body; the third water-cooling body is opposite to the fourth water-cooling body;

[0007] The third water-cooling body is provided with a water inlet, and the fourth water-cooling body is provided with a water outlet;

[0008] The water-cooling channel provided on the third water-cooling body includes a first branch and a second branch, the first branch is communicated with the water-cooling channel on the first water-cooling body, and the second branch is communicated with the water-cooling channel on the second water-cooling body, so that the coolant is divided after entering from the water inlet, and flows into the water-cooling channel on the first water-cooling body through the first branch, and flows into the water-cooling channel on the second water-cooling body through the second branch;

[0009] The water-cooling water channel arranged on the fourth water-cooling body includes a third branch and a fourth branch, the third branch is connected with the water-cooling water channel on the first water-cooling body, so that the coolant reaches the water outlet from the water-cooling water channel on the first water-cooling body through the third branch, and the fourth branch is connected with the water-cooling water channel on the second water-cooling body, so that the coolant reaches the water outlet from the water-cooling water channel on the second water-cooling body through the fourth branch.

[0010] Furthermore, the third water-cooling body and the fourth water-cooling body are realized by bowl-shaped plug cold extrusion.

[0011] Furthermore, a first module to dissipate heat is arranged on the outer surface of the first water-cooling body;

[0012] The water-cooling channel on the first water-cooling body includes a fifth branch and a sixth branch, and the fifth branch and the sixth branch are respectively arranged on different edges of the first water-cooling body to form two independent cooling and heat dissipation areas, which are used to cool and dissipate the corresponding components to be cooled in the first module respectively.

[0013] Furthermore, a first screw hole and a first positioning pin are provided on the outer surface of the first water-cooling body;

[0014] The first screw hole is used to fix the first module, so that the first module is fixedly connected to the first water-cooling body of the water-cooling channel housing, and the first module is cooled and dissipated through the first water-cooling body;

[0015] The first positioning pins are used to position the first module when the first module is fixedly connected to the first water-cooling body; the number of the first screw holes is 4, and the number of the first positioning pins is 2.

[0016] Furthermore, the water-cooling channel on the first water-cooling body also includes a seventh branch arranged between the fifth branch and the sixth branch. Correspondingly, the first branch includes a first inlet sub-branch connected to the seventh branch, and a second inlet sub-branch connected to the fifth branch and the sixth branch. The coolant in the fifth branch is the same as that in the sixth branch, and the coolant in the seventh branch is different from the coolant in the sixth branch.

[0017] Furthermore, a second module to be dissipated is arranged on the outer surface of the second water-cooling body; the water-cooling channel on the second water-cooling body includes an eighth branch and a ninth branch, and the eighth branch and the ninth branch are respectively arranged on different edges of the second water-cooling body to form two independent cooling and heat dissipation areas, which are used to cool and dissipate the corresponding components to be dissipated in the second module respectively.

[0018] Furthermore, a second screw hole and a second positioning pin are provided on the second water-cooling body;

[0019] The second screw hole is used to fix the second module so that the second module is fixedly connected to the second water-cooling body, and the second module is cooled and dissipated by the second water-cooling body;

[0020] The second positioning pins are used to position the second module when the second module is fixedly connected to the second water-cooling body; the number of the second screw holes is 4, and the number of the second positioning pins is 2.

[0021] Furthermore, the water-cooling water channel on the second water-cooling body also includes a tenth branch arranged between the eighth branch and the ninth branch. Correspondingly, the second branch includes a third inlet sub-branch connected to the tenth branch, and a fourth inlet sub-branch connected to the eighth branch and the ninth branch. The coolant in the eighth branch is the same as that in the ninth branch, and the coolant in the tenth branch is different from the coolant in the eighth branch.

[0022] Furthermore, the cavity formed by the first water-cooling body, the second water-cooling body, the third water-cooling body and the fourth water-cooling body is used to cool and dissipate heat for the third module, and the third module is fixed in the cavity by a potting process.

[0023] In a second aspect, the present application also provides a dual-motor drive controller, comprising the annular parallel water channel as described above, a first inverter power module, a second inverter power module and a support capacitor module;

[0024] Wherein, the first inverter power module is arranged on the first water-cooling body, and the second inverter power module is arranged on the second water-cooling body;

[0025] The supporting capacitor module is disposed in the cavity.

[0026] In a third aspect, the present application also provides a vehicle, comprising the dual-motor drive controller described in the second aspect above.

[0027] From the above description, it can be seen that the present invention provides a ring-shaped parallel water channel, in which the water-cooling water channel on the first water-cooling body and the water-cooling water channel on the second water-cooling body form a parallel ring-shaped water channel, which increases the area and heat dissipation efficiency of the heat dissipation area, so that high-loss and high-power devices such as the power modules and supporting capacitors of the dual inverter can be better cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A three-dimensional schematic diagram of an annular parallel water channel provided in an embodiment of the present invention;

[0030] Figure 2 A schematic top view of an annular parallel water channel provided in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of another annular parallel water channel provided in an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of a water channel fluid provided by an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of a ring-shaped water cooling support capacitor provided in an embodiment of the present invention.

[0034] In the figure: 110, second water-cooling body; 120, cavity; 130, fourth water-cooling body; 140, water channel sealing bowl-shaped plug; 210, first water-cooling body; 310, water inlet; 311, first branch; 312, second branch; 320, water-cooling water channel on the first water-cooling body; 330, water outlet; 331, third branch; 332, fourth branch; 340, water-cooling water channel on the second water-cooling body; 111, second screw hole; 112, second positioning pin; 113, eighth branch; 114, ninth branch; 115, tenth branch; 410, coolant; 510, supporting capacitor. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] The technical solutions of one or more embodiments of the present application are described in detail below through specific embodiments. In particular, the "dual motors" described in the embodiments of the present application specifically refer to the electric motors used to drive the vehicle and the generators used to generate electricity on the current new energy vehicles. The dual motor drive controller refers to a controller used to drive the above-mentioned electric motors and generators.

[0038] References Figure 1-Figure 3 A schematic diagram of a circular parallel waterway is shown, wherein along Figure 2 By cutting the c-plane shown in the figure, we can obtain Figure 3 A schematic diagram of a water channel is shown, in which the annular parallel water channel includes a cubic water-cooling water channel shell, and the water-cooling water channel shell includes a first water-cooling body 210, a second water-cooling body 110, a third water-cooling body (not shown in the figure) and a fourth water-cooling body 130.

[0039] The first water-cooling body 210 is opposite to the second water-cooling body 110; the third water-cooling body is opposite to the fourth water-cooling body 130; the third water-cooling body is provided with a water inlet 310, and the fourth water-cooling body 130 is provided with a water outlet 330;

[0040] The water-cooling channel arranged on the third water-cooling body includes a first branch 311 and a second branch 312. The first branch 311 is connected to the water-cooling channel on the first water-cooling body 210, and the second branch 312 is connected to the water-cooling channel on the second water-cooling body 110, so that the coolant is diverted after entering from the water inlet 310, and flows into the water-cooling channel on the first water-cooling body 210 through the first branch 311, and flows into the water-cooling channel on the second water-cooling body 110 through the second branch 312.

[0041] In the fourth water-cooling body 130, the water-cooling channel includes a third branch 331 and a fourth branch 332. The third branch 331 is connected to the water-cooling channel on the first water-cooling body 210 so that the coolant reaches the water outlet 330 from the water-cooling channel on the first water-cooling body 210 through the third branch 331. The fourth branch 332 is connected to the water-cooling channel on the second water-cooling body 110 so that the coolant reaches the water outlet 330 from the water-cooling channel on the second water-cooling body 110 through the fourth branch 332.

[0042] In some embodiments, Figure 1 As shown, a second screw hole 111 and a second positioning pin 112 are provided on the outer surface of the second water-cooling body 110; the second screw hole 111 is used to fix the second module, so that the second module is fixedly connected to the second water-cooling body 110 of the water-cooling channel housing, and the second module is cooled and dissipated by the second water-cooling body 110. The second positioning pin 112 is used to position the second module when the second module is fixedly connected to the second water-cooling body 110 of the water-cooling channel housing. The number of the second screw holes is 4, and the number of the second positioning pins is 2.

[0043] Similarly, a first screw hole and a first positioning pin are provided on the first water-cooling body; the first screw hole is used to fix the first module, so that the first module is fixedly connected to the first water-cooling body, and the first module is cooled and dissipated by the first water-cooling body; the first positioning pin is used to position the first module when the first module is fixedly connected to the first water-cooling body. The number of the first screw holes is 4, and the number of the first positioning pins is 2.

[0044] Furthermore, the cavity 120 formed by the first water-cooling body 210 , the second water-cooling body 110 , the third water-cooling body and the fourth water-cooling body 130 is used to cool and dissipate heat for the third module, and the third module is fixed in the cavity 120 by a potting process.

[0045] In some embodiments, the third water-cooling body and the fourth water-cooling body 130 are realized by cold extrusion of a bowl-shaped plug. For the water-cooling channel itself, the symmetrical design does not require a complex molding process and can be directly molded by die-drawing. The transition area (i.e., the third water-cooling body and the fourth water-cooling body 130) is sealed by cold extrusion of a standard bowl-shaped plug (water channel sealing bowl-shaped plug such as Figure 1 As shown in the reference numeral 140), it is possible to better realize integration and installation connection with the dual inverter box (or other power components).

[0046] In some embodiments, the water-cooling channel on the second water-cooling body 110 includes an eighth branch 113 and a ninth branch 114, and the eighth branch 113 and the ninth branch 114 are respectively arranged at different edges of the second water-cooling body 110 to form two independent cooling and heat dissipation areas, which are used to cool and dissipate the corresponding components to be cooled in the second module, such as Figure 1 and Figure 4 As shown, 410 represents the coolant. Such a configuration can be compatible with some components that can better exert their performance when working at a certain temperature, that is, such components are installed in the non-cooling and heat dissipation area in the middle of the second water-cooling body 110, and the components that need cooling and heat dissipation are arranged in the cooling area formed by the eighth branch 113 and the ninth branch 114 respectively. .

[0047] Furthermore, the water-cooling channel on the second water-cooling body 110 also includes a tenth branch 115 disposed between the eighth branch 113 and the ninth branch 114. Correspondingly, the second branch 312 includes a third inflow sub-branch connected to the tenth branch 115, and a fourth inflow sub-branch connected to the eighth branch 113 and the ninth branch 115, the coolant in the eighth branch 113 is the same as that in the ninth branch 115, and the coolant in the tenth branch 115 is different from the coolant in the eighth branch 113.

[0048] Similarly, in some embodiments, the water-cooling channel on the first water-cooling body symmetrically designed with the second water-cooling body 110 includes a fifth branch and a sixth branch, and the fifth branch and the sixth branch are respectively arranged at different edges of the first water-cooling body to form two independent cooling and heat dissipation areas, which are used to cool and dissipate the corresponding components to be cooled in the first module. Figure 4 A schematic diagram of a water-cooling channel fluid is shown, where 410 represents the coolant. Such an arrangement can be compatible with some components that can better exert their performance when working at a certain temperature, that is, such components are installed in the non-cooling and heat dissipation area in the middle of the first water-cooling body, and the components that need cooling and heat dissipation are arranged in the cooling area formed by the fifth branch and the sixth branch respectively.

[0049] Furthermore, in some embodiments, the water-cooling channel on the first water-cooling body also includes a seventh branch disposed between the fifth branch and the sixth branch. Correspondingly, the first branch includes a first inflow sub-branch connected to the seventh branch, and a second inflow sub-branch connected to the fifth branch and the sixth branch. The coolant in the fifth branch is the same as that in the sixth branch, and the coolant in the seventh branch is different from that in the sixth branch. By making the coolants in different branches different, cooling functions with different capabilities can be achieved. For example, if a stronger cooling capability is desired, a coolant with a stronger cooling capability can be used. That is, the seventh branch and the fifth branch (or the sixth branch) can achieve cooling functions with different capabilities, thereby achieving the purpose of cooling and dissipating heat for components with different cooling requirements. That is, the design of the water-cooling channel on the first water-cooling body is the same as the design of the water-cooling channel on the second water-cooling body, and both can include two-way branches or three-way branches to form different heat dissipation areas.

[0050] In some embodiments, a dual-motor drive controller is also provided, including the annular parallel water channel, a first inverter power module, a second inverter power module and a support capacitor module; wherein the first inverter power module is arranged on the first water-cooling body 210, and the second inverter power module is arranged on the second water-cooling body 110; and the support capacitor module is arranged in the cavity 120.

[0051] The supporting capacitor module is arranged in the cavity 120 formed by the first water-cooling body 210, the second water-cooling body 110, the third water-cooling body and the fourth water-cooling body 130 through the potting process. In this way, not only can the first inverter power module be directly water-cooled and heat-dissipated, but also the second inverter power module can be directly water-cooled and heat-dissipated, and at the same time, the upper, lower, left and right sides of the supporting capacitor module are directly in contact with the water-cooling water channel, forming a ring-shaped water-cooling water channel scheme, realizing direct water cooling of the supporting capacitor laminated busbar, the capacitor core, the first inverter power module and the second inverter power module, thereby making the IGBT (IGBT is the power device in the first inverter power module and the second inverter power module) better play the current sharing in the system; for the supporting capacitor itself, a complete ring water cooling can be achieved, so that the influence of the capacitor core arrangement on the heat dissipation performance can be ignored, making the arrangement of the supporting capacitor core more flexible.

[0052] Among them, the first inverter power module is used to control the generator of the whole vehicle, the second inverter power module is used to control the drive motor of the whole vehicle, and the supporting capacitor module is used to realize conventional functions such as power storage and filtering.

[0053] In some embodiments, reference is made to Figure 1A three-dimensional schematic diagram of a ring-shaped parallel water channel is shown, wherein the second inverter power module is arranged on the second water-cooling body 110 of the water-cooling water channel housing, and the first inverter power module is arranged on the first water-cooling body of the water-cooling water channel housing (the first water-cooling body is opposite to the second water-cooling body 110, Figure 1 The supporting capacitor module is disposed in the cavity 120.

[0054] In some embodiments, continue to refer to Figure 1 As shown, the water-cooling channel housing includes two sets of opposite surfaces; the first water-cooling body (the first water-cooling body is opposite to the second water-cooling body 110, Figure 1 The third water-cooling body (the third water-cooling body is opposite to the fourth water-cooling body 130, and the Figure 1 The water inlet of the water-cooling channel shell is arranged on the third water-cooling body, and the water outlet of the water-cooling channel shell is arranged on the fourth water-cooling body 130; the supporting capacitor module is arranged in the cavity formed by the two groups of opposing surfaces, so that the upper, lower, left and right sides of the supporting capacitor module are in contact with the water-cooling channel shell.

[0055] Correspondingly, refer to Figure 2 The schematic top view of a water-cooling channel housing is shown in FIG. 2 , wherein the area indicated by reference numeral 210 is the first water-cooling body of the water-cooling channel housing, or the heat dissipation cooling area of ​​the first inverter power module. Figure 2 By cutting the c-plane shown in the figure, we can obtain Figure 3 Schematic diagram of a water cooling channel, including a water inlet 310, a first branch 311, a second branch 312, a water cooling channel 320 on a first water cooling body, a water outlet 330, a third branch 331, a fourth branch 332 and a water cooling channel 340 on a second water cooling body. Figure 3 It can be seen that the coolant is diverted after entering from the water inlet 310, and flows into the water-cooling water channel 320 on the first water-cooling body through the first branch 311, and flows into the water-cooling water channel 340 on the second water-cooling body through the second branch 312; the coolant reaches the water outlet 330 from the water-cooling water channel 320 on the first water-cooling body through the third branch 331, and reaches the water outlet 330 from the water-cooling water channel 340 on the second water-cooling body through the fourth branch 332.

[0056] In summary, the water inlet 310 of the water-cooling channel housing is arranged at the middle position of the third water-cooling body, and the water outlet 330 of the water-cooling channel housing is arranged at the middle position of the fourth water-cooling body; the water-cooling channel arranged in the third water-cooling body includes a first branch 311 and a second branch 312, the first branch 311 is connected to the water-cooling channel 320 on the first water-cooling body, and the second branch 312 is connected to the water-cooling channel 340 on the second water-cooling body, so that the coolant enters from the water inlet 310 and is divided, and flows into the water-cooling channel 320 on the first water-cooling body through the first branch 311 respectively. , flows into the water-cooling water channel 340 on the second water-cooling body through the second branch 312; the water-cooling water channel arranged on the fourth water-cooling body includes a third branch 331 and a fourth branch 332, the third branch 331 is connected with the water-cooling water channel 320 on the first water-cooling body, so that the cooling liquid reaches the water outlet 330 from the water-cooling water channel 320 on the first water-cooling body through the third branch 331, and the fourth branch 332 is connected with the water-cooling water channel 340 on the second water-cooling body, so that the cooling liquid reaches the water outlet 330 from the water-cooling water channel 340 on the second water-cooling body through the fourth branch 332.

[0057] like Figure 5 A schematic diagram of an annular water cooling of a supporting capacitor is shown, wherein 510 represents a supporting capacitor.

[0058] The present invention provides an annular parallel water channel with an annular water-cooling water channel. For a first inverter power module and a second inverter power module, the two have corresponding parallel water-cooling water channels respectively, which have higher heat dissipation efficiency and lower flow resistance design, thereby improving the heat dissipation capacity and efficiency, so that high-loss and high-power devices such as the power modules and supporting capacitors of the dual inverters can be better cooled, thereby improving the current sharing of the inverter power modules and the robustness of the supporting capacitors.

[0059] The present application also provides a vehicle, comprising the dual-motor drive controller described in the above embodiment.

[0060] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0061] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0062] It should be noted that the terms used in this application are only for describing specific embodiments, rather than limiting the scope of this application. As shown in the specification and claims of this application, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0063] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A circular parallel waterway, characterized in that: It comprises a water-cooling channel housing in a cubic shape, wherein the water-cooling channel housing comprises a first water-cooling body, a second water-cooling body, a third water-cooling body and a fourth water-cooling body; The first water-cooling body is opposite to the second water-cooling body; the third water-cooling body is opposite to the fourth water-cooling body; The third water-cooling body is provided with a water inlet, and the fourth water-cooling body is provided with a water outlet; The water-cooling channel provided on the third water-cooling body includes a first branch and a second branch, the first branch is communicated with the water-cooling channel on the first water-cooling body, and the second branch is communicated with the water-cooling channel on the second water-cooling body, so that the coolant is divided after entering from the water inlet, and flows into the water-cooling channel on the first water-cooling body through the first branch, and flows into the water-cooling channel on the second water-cooling body through the second branch; The water-cooling water channel arranged on the fourth water-cooling body includes a third branch and a fourth branch, the third branch is connected with the water-cooling water channel on the first water-cooling body, so that the coolant reaches the water outlet from the water-cooling water channel on the first water-cooling body through the third branch, and the fourth branch is connected with the water-cooling water channel on the second water-cooling body, so that the coolant reaches the water outlet from the water-cooling water channel on the second water-cooling body through the fourth branch.

2. The annular parallel water channel according to claim 1, characterized in that: A first module to be cooled is arranged on the outer surface of the first water-cooling body; The water-cooling channel on the first water-cooling body includes a fifth branch and a sixth branch, and the fifth branch and the sixth branch are respectively arranged on different edges of the first water-cooling body to form two independent cooling and heat dissipation areas, which are used to cool and dissipate the corresponding components to be cooled in the first module respectively.

3. The annular parallel water channel according to claim 2, characterized in that: A first screw hole and a first positioning pin are provided on the outer surface of the first water-cooling body; The first screw hole is used to fix the first module so that the first module is fixedly connected to the outer surface of the first water-cooling body; The first positioning pin is used to position the first module when the first module is fixedly connected to the first water-cooling body; The number of the first screw holes is 4, and the number of the first positioning pins is 2.

4. The annular parallel water channel according to claim 2, characterized in that: The water-cooling channel on the first water-cooling body also includes a seventh branch arranged between the fifth branch and the sixth branch. Correspondingly, the first branch includes a first inlet sub-branch connected to the seventh branch, and a second inlet sub-branch connected to the fifth branch and the sixth branch. The coolant in the fifth branch is the same as that in the sixth branch, and the coolant in the seventh branch is different from the coolant in the sixth branch.

5. The annular parallel water channel according to claim 1, characterized in that: A second module to be cooled is arranged on the outer surface of the second water-cooling body; The water-cooling channel on the second water-cooling body includes an eighth branch and a ninth branch, and the eighth branch and the ninth branch are respectively arranged at different edges of the second water-cooling body to form two independent cooling and heat dissipation areas, which are used to cool and dissipate the corresponding components to be cooled in the second module respectively.

6. The annular parallel water channel according to claim 5, characterized in that: A second screw hole and a second positioning pin are provided on the second water-cooling body; The second screw hole is used to fix the second module so that the second module is fixedly connected to the second water-cooling body; The second positioning pin is used to position the second module when the second module is fixedly connected to the second water-cooling body; The number of the second screw holes is 4, and the number of the second positioning pins is 2.

7. The annular parallel water channel according to claim 5, characterized in that: The water-cooling channel on the second water-cooling body also includes a tenth branch arranged between the eighth branch and the ninth branch. Correspondingly, the second branch includes a third inlet sub-branch connected to the tenth branch, and a fourth inlet sub-branch connected to the eighth branch and the ninth branch. The coolant in the eighth branch is the same as that in the ninth branch, and the coolant in the tenth branch is different from the coolant in the eighth branch.

8. The annular parallel water channel according to claim 1, characterized in that: The cavity formed by the first water-cooling body, the second water-cooling body, the third water-cooling body and the fourth water-cooling body is used to cool and dissipate heat for the third module, and the third module is fixed in the cavity by a potting process; The third water-cooling body and the fourth water-cooling body are realized by bowl-shaped plug cold extrusion.

9. A dual motor drive controller, characterized in that: It comprises the annular parallel water channel as described in any one of claims 1 to 8, a first inverter power module, a second inverter power module and a supporting capacitor module; Wherein, the first inverter power module is arranged on the first water-cooling body, and the second inverter power module is arranged on the second water-cooling body; The supporting capacitor module is disposed in the cavity.

10. A vehicle, characterized in that: Comprising the dual motor drive controller as described in claim 9.

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