Liquid cooling device, controller and vehicle

Abstract

The invention discloses a liquid cooling device, a controller and a vehicle. The liquid cooling device comprises a shell, a first confluence pool and a cooling channel are arranged in the shell, the first confluence pool is located on the upstream of the cooling channel, and the first confluence pool and the cooling channel are communicated through an input crack; the shell is provided with an input interface for cooling liquid to enter the liquid cooling device, and the size of the input crack is larger than that of the input interface in the direction perpendicular to the flowing direction of the cooling liquid. According to the liquid cooling device, the input crack is arranged for the cooling channel, and the input crack has a relatively large passing size to ensure that the cooling liquid uniformly enters the cooling channel, so that the problem of non-uniform fluid distribution in the cooling channel can be effectively avoided, and the liquid cooling device has excellent uniform temperature performance.

Description

Technical Field

[0001] The present invention generally relates to the technical field of cooling equipment, and more particularly to a liquid cooling device, a controller and a vehicle. Background Art

[0002] During operation, the Intelligent Power Module (IPM) not only needs to meet the high heat dissipation requirements of the IPM power module, but also needs to ensure the temperature consistency of its internal components. The prior art often uses a radiator to control its temperature. Existing water-cooled radiators are usually provided with multiple cooling channels inside. The coolant flowing in the cooling channels can absorb the heat of the IGBT, thereby cooling the IGBT. However, during the input process of the coolant, it cannot be evenly input into multiple cooling channels. The coolant flow rates in different cooling channels are different, resulting in uneven cooling of the IGBT, reducing the cooling efficiency, and also reducing the optimal performance of the IGBT. Summary of the invention

[0003] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0004] In order to at least partially solve the above problems, a first aspect of the present invention provides a liquid cooling device, comprising:

[0005] The shell has a first confluence pool and a cooling channel disposed therein, the first confluence pool is located upstream of the cooling channel, and the first confluence pool and the cooling channel are connected via an input slit; the shell is provided with an input interface for coolant to enter the liquid cooling device, and in a direction perpendicular to the flow direction of the coolant, the size of the input slit is larger than the size of the input interface.

[0006] Optionally, a second confluence pool is further provided inside the shell, the second confluence pool is located downstream of the cooling channel, the cooling channel is further provided with an output slit, and the second confluence pool is connected to the cooling channel through the output slit.

[0007] Optionally, the cooling channel comprises:

[0008] A main cooling channel, wherein the inlet of the main cooling channel is arranged in the middle of the main cooling channel, the outlet of the main cooling channel is arranged at both ends of the main cooling channel, and the input slit is connected to the inlet of the main cooling channel; and

[0009] A secondary cooling channel, wherein the secondary cooling channel is parallel to the main cooling channel, the inlet of the secondary cooling channel is arranged at both ends of the secondary cooling channel, the outlet of the secondary cooling channel is arranged in the middle of the secondary cooling channel, and the output slit is connected to the outlet of the secondary cooling channel.

[0010] Optionally, the auxiliary cooling channel comprises:

[0011] A first auxiliary cooling channel and a second auxiliary cooling channel, wherein the main cooling channel is disposed between the first auxiliary cooling channel and the second auxiliary cooling channel.

[0012] Optionally, a first converging channel is provided inside the shell corresponding to the first end of the cooling channel, and the first converging channel connects the outlet of the main cooling channel on the same side with the inlet of the first auxiliary cooling channel and the inlet of the second auxiliary cooling channel;

[0013] A second converging channel is provided inside the shell corresponding to the second end of the cooling channel, and the second converging channel connects the outlet of the main cooling channel on the same side with the inlet of the first auxiliary cooling channel and the inlet of the second auxiliary cooling channel.

[0014] Optionally, the liquid cooling device further comprises:

[0015] a partition, the partition being arranged inside the shell to separate the first confluence pool, the second confluence pool and the cooling channel;

[0016] The output slit includes a first output slit and a second output slit. The input slit, the first output slit, and the second output slit are arranged in the middle of the partition. The first output slit is connected to the outlet of the first auxiliary cooling channel, and the second output slit is connected to the outlet of the second auxiliary cooling channel.

[0017] Optionally, the liquid cooling device further comprises:

[0018] A baffle, the baffle is arranged between the partition and the top of the shell and is located in the middle of the partition, the baffle is provided with a bend to separate the input slit from the first output slit and the second output slit, the input slit is located on one side of the baffle, and the first output slit and the second output slit are located on the other side of the baffle.

[0019] Optionally, the input slit, the first output slit and the second output slit are located on a straight line, and the baffle is provided with the bend at a position corresponding to the input slit adjacent to the first output slit, and is provided with the bend at a position corresponding to the input slit adjacent to the second output slit.

[0020] Optionally, the first confluence pool and the input slit are located on the same side of the baffle, and the second confluence pool and the first output slit and the second output slit are located on the same side of the baffle.

[0021] Optionally, a first partition is provided between the first auxiliary cooling channel and the main cooling channel, and a second partition is provided between the second auxiliary cooling channel and the main cooling channel, and both the first partition and the second partition are connected to the baffle.

[0022] Optionally, the first output slit and the second output slit are both long strip-shaped holes;

[0023] The input slit is perpendicular to the main cooling channel, the first output slit is perpendicular to the first auxiliary cooling channel, and the second output slit is perpendicular to the second auxiliary cooling channel.

[0024] Optionally, the main cooling channel includes a plurality of parallel sub-channels, the first auxiliary cooling channel includes a plurality of parallel sub-channels, and the second auxiliary cooling channel includes a plurality of parallel sub-channels.

[0025] Optionally, the cooling channel includes a plurality of parallel heat dissipation fins, adjacent heat dissipation fins constitute the sub-channel, the first long side of the heat dissipation fin is tightly connected to the partition, and the second long side of the heat dissipation fin is tightly connected to the bottom of the shell.

[0026] Optionally, a heat dissipation fin density in the main cooling channel is greater than a heat dissipation fin density in the first auxiliary cooling channel and a heat dissipation fin density in the second auxiliary cooling channel.

[0027] A second aspect of the present invention provides a controller, comprising a power module and a liquid cooling device as described in any one of the above technical solutions, wherein the power module is arranged on the outer wall of the shell, and thermal conductive adhesive is arranged between the power module and the outer wall of the shell.

[0028] A third aspect of the present invention provides a vehicle, comprising a drive device and a controller according to any one of the above technical solutions, wherein the controller is used to control the drive device.

[0029] According to a liquid cooling device, controller and vehicle of the present invention, the liquid cooling device is provided with an input slit for the cooling channel, and the input slit has a large passing size to ensure that the coolant enters the cooling channel evenly, which can effectively avoid the problem of uneven fluid distribution in the cooling channel, so that the liquid cooling device has excellent temperature uniformity. A first confluence pool is provided between the input interface and the input slit, and the coolant is collected in the first confluence pool before entering the input slit, so that a sufficient flow of coolant can enter the input slit, thereby improving the sufficiency of the coolant entering the input slit. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The embodiments of the present invention and their description are shown in the drawings to explain the principles of the present invention. In the drawings,

[0031] Figure 1 A diagram showing a use state of a liquid cooling device according to a preferred embodiment of the present invention;

[0032] Figure 2 A cross-sectional view of a liquid cooling device according to a preferred embodiment of the present invention;

[0033] Figure 3 A cross-sectional view of a liquid cooling device according to a preferred embodiment of the present invention;

[0034] Figure 4 A three-dimensional diagram of the internal structure of a liquid cooling device according to a preferred embodiment of the present invention;

[0035] Figure 5 A three-dimensional diagram of the internal structure of a liquid cooling device according to a preferred embodiment of the present invention;

[0036] Figure 6 for Figure 3 Enlarged view of part A in .

[0037] Description of reference numerals:

[0038] 100: Liquid cooling device 101: Housing

[0039] 102: Cooling channel 103: Main cooling channel

[0040] 104: Auxiliary cooling channel 1041: First auxiliary cooling channel

[0041] 1042: Second auxiliary cooling channel 105: Input gap

[0042] 106: first confluence channel 107: second confluence channel

[0043] 108: partition 109: first confluence pool

[0044] 110: Second confluence pool 111: Output gap

[0045] 1111: first output gap 1112: second output gap

[0046] 114: Input interface 115: Output interface

[0047] 116: Baffle 117: First partition

[0048] 118: Second partition 119: Heat sink

[0049] 200: Integrated heat sink 300: Bare chip DETAILED DESCRIPTION

[0050] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0051] In order to fully understand the present invention, a detailed description will be provided in the following description. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0052] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0053] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0054] The present invention discloses a liquid cooling device 100 and a controller.

[0055] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

[0056] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, in a preferred embodiment, a liquid cooling device 100 includes: a housing 101. In order to adapt to the controller that needs to be cooled, the housing 101 is configured as a rectangular structure, and can also be configured as other shapes as needed;

[0057] A first confluence pool 109 and a cooling channel 102 are provided inside the shell 101. The first confluence pool 109 is located upstream of the cooling channel 102. The first confluence pool 109 and the cooling channel 102 are connected through an input slit 105. An input interface 114 for coolant to enter the liquid cooling device is provided on the shell 101. In a direction perpendicular to the flow direction of the coolant, the size of the input slit 105 is larger than the size of the input interface 114.

[0058] The liquid cooling device 100 in this embodiment is provided with an input slit 105 for the cooling channel 102. The input slit 105 has a large passing size to ensure that the coolant enters the cooling channel 102 evenly, which can effectively avoid the problem of uneven fluid distribution in the cooling channel 102, so that the liquid cooling device 100 has excellent temperature uniformity. A first confluence pool 109 is provided between the input interface 114 and the input slit 105. The coolant is collected in the first confluence pool 109 and then enters the input slit 105, so that a sufficient flow of coolant can enter the input slit 105, thereby improving the sufficiency of the coolant entering the input slit 105.

[0059] In one embodiment, if Figure 4 , Figure 5 As shown, a second confluence pool 110 is further provided inside the housing 101 . The second confluence pool 110 is located downstream of the cooling channel 102 . The cooling channel 102 is further provided with an output slit 111 . The second confluence pool 110 is connected to the cooling channel 102 through the output slit 111 .

[0060] After flowing out from the output slit 111 , the coolant is collected in the second confluence pool 110 , and then flows out from the second confluence pool 110 .

[0061] In one embodiment, if Figure 2 As shown, an input interface 114 and an output interface 115 are provided on the top of the housing 101 . The input interface 114 is used to input coolant, and the output interface 115 is used to output coolant. The input interface 114 is connected to the first confluence pool 109 , and the output interface 115 is connected to the second confluence pool 110 .

[0062] The input interface 114 and the output interface 115 are externally connected to a coolant circulation pipeline, and the coolant circulation pipeline is connected to a coolant supply device, which can provide a driving force for the circulation of the coolant. The coolant can be pure water, deionized water, ethylene glycol aqueous solution, or other types of coolants.

[0063] The input interface 114 and the output interface 115 can be connected to the coolant circulation pipeline by threaded connection, clamping connection, etc., and a sealing device needs to be provided at the connection position to ensure that the coolant does not leak.

[0064] The diameters of the input interface 114 and the output interface 115 can be selected as 6 mm, 8 mm, 10 mm, or 12 mm as needed.

[0065] In one embodiment, if Figure 3 As shown, the cooling channel 102 includes:

[0066] A main cooling channel 103, wherein the inlet of the main cooling channel 103 is arranged in the middle of the main cooling channel 103, the outlet of the main cooling channel 103 is arranged at both ends of the main cooling channel 103, and the input slit 105 is connected to the inlet of the main cooling channel 103; and

[0067] The auxiliary cooling channel 104 is parallel to the main cooling channel 103 , the inlet of the auxiliary cooling channel 104 is arranged at both ends of the auxiliary cooling channel 104 , the outlet of the auxiliary cooling channel 104 is arranged in the middle of the auxiliary cooling channel 104 , and the output slot 111 is connected to the outlet of the auxiliary cooling channel 104 .

[0068] The liquid cooling device 100 in this embodiment is provided with a coolant inlet in the middle of the main cooling channel 103 to ensure that the coolant enters the main cooling channel 103 evenly and flows evenly from the central area of ​​the liquid cooling device 100 to both sides, which can effectively avoid the problem of uneven fluid distribution in the main cooling channel 103;

[0069] The coolant flows in both directions in the main cooling channel 103 and the auxiliary cooling channel 104, flowing from the central inlet area to both sides and then from both sides to the return area. Compared with the prior art, when the same mass flow rate of coolant flows through, the liquid cooling device 100 using the bidirectional flow has excellent temperature uniformity and a smaller pressure drop in the channel.

[0070] Specifically, compared with 100% of the coolant passing through the series channels in sequence, the main cooling channel 103 in this embodiment allows the coolant to flow from the central area to both sides, that is, only 50% of the coolant flows from the central area to the left, and 50% of the coolant flows from the central area to the right, thereby significantly reducing the liquid flow rate inside the cooling channel, thereby reducing the pressure drop of the cold plate.

[0071] In one embodiment, if Figure 3 As shown, the auxiliary cooling channel 104 includes:

[0072] The first auxiliary cooling channel 1041 and the second auxiliary cooling channel 1042 , and the main cooling channel 103 is disposed between the first auxiliary cooling channel 1041 and the second auxiliary cooling channel 1042 .

[0073] The main cooling channel 103 is disposed between the first auxiliary cooling channel 1041 and the second auxiliary cooling channel 1042 , and the three groups of cooling channels are all connected in parallel.

[0074] By setting up two parallel auxiliary cooling channels, it can be ensured that the bare chips inside the power module have the same cooling boundary conditions (same fluid temperature and flow), thereby effectively avoiding the problem of large temperature difference caused by the increase of fluid temperature common in series channels.

[0075] The area of ​​the main cooling channel 103 is larger than the sum of the areas of the first auxiliary cooling channel 1041 and the second auxiliary cooling channel 1042 , so that the side wall of the housing 101 has a larger cooling area, which can provide cooling services for higher power controllers.

[0076] In one embodiment, if Figure 3 As shown, a first converging channel 106 is provided inside the housing 101 corresponding to the first end of the cooling channel 102, and the first converging channel 106 connects the outlet of the main cooling channel 103 on the same side with the inlet of the first auxiliary cooling channel 1041 and the inlet of the second auxiliary cooling channel 1042;

[0077] A second converging channel 107 is provided inside the housing 101 corresponding to the second end of the cooling channel 102 , and the second converging channel 107 connects the outlet of the main cooling channel 103 on the same side with the inlet of the first auxiliary cooling channel 1041 and the inlet of the second auxiliary cooling channel 1042 .

[0078] The length of the cooling channel 102 is smaller than the length of the inner space of the housing 101 , so that converging channels are formed at both ends of the cooling channel 102 .

[0079] In one embodiment, if Figure 3 As shown, the liquid cooling device 100 further includes:

[0080] A partition 108, which is disposed inside the housing 101 to separate the first confluence pool 109, the second confluence pool 110 and the cooling channel 102;

[0081] The output slot 111 includes a first output slot 1111 and a second output slot 1112. The input slot (105), the first output slot 1111, and the second output slot 1112 are arranged in the middle of the partition 108. The first output slot 1111 is connected to the outlet of the first auxiliary cooling channel 1041, and the second output slot 1112 is connected to the outlet of the second auxiliary cooling channel 1042.

[0082] The partition 108 is fixedly installed in the housing 101, and the four sides are sealed and fixedly connected to the side walls of the housing 101. After the coolant flows into the housing 101 from the input interface 114, it must pass through the input slit 105 to flow into the main cooling channel 103. When the coolant flows out of the auxiliary cooling channel 104, it must pass through the first output slit 1111 and the second output slit 1112 to flow out of the auxiliary cooling channel 104.

[0083] In one embodiment, if Figure 5 As shown, the liquid cooling device 100 further includes:

[0084] Baffle 116, baffle 116 is arranged between partition 108 and the top of shell 101 and is located in the middle of partition 108, baffle 116 is provided with a bend to separate input slit 105 from first output slit 1111 and second output slit 1112, input slit 105 is located on one side of baffle 116, and first output slit 1111 and second output slit 1112 are located on the other side of baffle 116.

[0085] One long side of the baffle 116 is sealed and fixedly connected to the partition 108, and the other long side is sealed and fixedly connected to the side wall of the housing 101. By setting the bend, it can pass between the input slit 105 and the first output slit 1111, and between the input slit 105 and the second output slit 1112.

[0086] In one embodiment, if Figure 4 , Figure 5 As shown, the input slit 105 , the first output slit 1111 and the second output slit 1112 are located in a straight line, and the baffle 116 is provided with a bend at a position adjacent to the input slit 105 and the first output slit 1111 , and a bend at a position adjacent to the input slit 105 and the second output slit 1112 .

[0087] In one embodiment, the first confluence pool 109 and the input slit 105 are located on the same side of the baffle 116 , and the second confluence pool 110 and the first output slit 1111 and the second output slit 1112 are located on the same side of the baffle 116 .

[0088] Specifically, the first confluence pool 109 and the second confluence pool 110 are formed by the partition 108 , the baffle 116 , and the inner wall of the outer shell 101 .

[0089] After the coolant flows into the housing 101 from the input interface 114, it first flows into the first confluence pool 109 and then flows into the input slit 105. After the coolant flows out from the first output slit 1111 and the second output slit 1112, it first flows into the second confluence pool 110 and then flows out of the housing 101 from the output interface 115.

[0090] In one embodiment, if Figure 3 As shown, a first partition 117 is provided between the first auxiliary cooling channel 1041 and the main cooling channel 103 , and a second partition 118 is provided between the second auxiliary cooling channel 1042 and the main cooling channel 103 . Both the first partition 117 and the second partition 118 are connected to the baffle 116 .

[0091] The first partition 117 and the second partition 118 are both connected to the baffle 116 , which can ensure that the coolant will not flow in the wrong direction and always flows from the main cooling channel 103 to the first auxiliary cooling channel 1041 and the second auxiliary cooling channel 1042 .

[0092] In one embodiment, if Figure 4 , Figure 5 As shown, the first output slit 1111 and the second output slit 1112 are both long strip-shaped holes;

[0093] The input slit 105 is perpendicular to the main cooling channel 103 , the first output slit 1111 is perpendicular to the first auxiliary cooling channel 1041 , and the second output slit 1112 is perpendicular to the second auxiliary cooling channel 1042 .

[0094] The long holes can adapt to wider cooling channels and also make the flow of coolant more uniform.

[0095] The length of the input slot 105 is greater than that of the first output slot 1111 and the second output slot 1112 because the width of the main cooling channel 103 is greater than that of the first auxiliary cooling channel 1041 and the second auxiliary cooling channel 1042 .

[0096] In one embodiment, if Figure 3 As shown, the main cooling channel 103 includes a plurality of parallel sub-channels, the first auxiliary cooling channel 1041 includes a plurality of parallel sub-channels, and the second auxiliary cooling channel 1042 includes a plurality of parallel sub-channels.

[0097] In one embodiment, if Figure 6 As shown, the cooling channel 102 includes a plurality of parallel heat dissipation fins 119 , and adjacent heat dissipation fins 119 form a sub-channel. The first long side of the heat dissipation fin 119 is tightly connected to the partition 108 , and the second long side of the heat dissipation fin 119 is tightly connected to the bottom of the housing 101 .

[0098] In one embodiment, if Figure 6 As shown, the density of the heat dissipation fins 119 in the main cooling channel 103 is greater than the density of the heat dissipation fins 119 in the first auxiliary cooling channel 1041 and the density of the heat dissipation fins 119 in the second auxiliary cooling channel 1042 .

[0099] The manufacturing process of the liquid cooling device 100 may be referred to as follows:

[0100] The main components such as the housing 101, the cooling channel 102, the partition 108, the baffle 116, etc. can be made of copper alloy or aluminum alloy, which has excellent thermal conductivity;

[0101] The heat dissipation fins 119 and the first partition 117 and the second partition 118 can be integrally processed on the inner wall of the housing 101, for example, by CNC processing;

[0102] The partition plate 108 and the baffle plate 116 can be manufactured separately and installed into the housing 101 in sequence, for example, fixed into the housing 101 by welding;

[0103] The housing 101 is finally closed from the outside, thereby completing the liquid cooling device 100 .

[0104] like Figure 1 As shown, an embodiment of the present invention further provides a controller, including a power module, and also includes a liquid cooling device 100 described in any one of the above embodiments, the power module is arranged on the outer wall of the shell 101, and thermal conductive glue is arranged between the power module and the outer wall of the shell 101.

[0105] Figure 1 It is an assembly diagram of an IPM power module (mainly composed of a bare chip 300 and an integrated heat spreader 200, the English abbreviation of the integrated heat spreader is HIS, Integrated heat spreader), a thermal conductive adhesive and a liquid cooling device 100. A thermal conductive adhesive (about 0.1 mm) is applied between the liquid cooling device 100 and the integrated heat spreader to reduce the contact thermal resistance between the two.

[0106] Among them, the mainstream area with a larger area (main cooling channel 103) corresponds to the chip area of ​​the IPM power module (high heat flux density area), and the two return areas with smaller areas (first auxiliary cooling channel 1041 and second auxiliary cooling channel 1042) correspond to the areas outside the chip area of ​​the IPM power module (low heat flux density area).

[0107] The dense fin density is arranged in the mainstream area inside the liquid cooling device 100 to enhance the heat exchange capacity of the coolant in this area and meet the heat dissipation requirements of the IPM power module chip area, while the sparse fin density (corresponding to the low heat flux density area) is arranged in the reflow area inside the liquid cooling device 100 to further reduce the power consumption of the cold plate while meeting the IPM heat dissipation requirements. The thickness of the fin is about 0.6-1mm (the preferred solution of this embodiment), and there are tiny channels between adjacent fins. The ratio of the width of the tiny channel to the thickness of the fin is generally greater than 1.

[0108] The heat transfer process between the IPM power module and the liquid cooling device 100 is as follows: the bare chip 300 inside the IPM power module generates heat during operation and then transfers it to the integrated heat sink 200 on top of it to increase its temperature; then a temperature difference is generated between the integrated heat sink 200 with a higher temperature and the thermal conductive glue, and the heat is transferred to the thermal conductive glue by heat conduction; the thermal conductive glue absorbs heat and its temperature rises, and a temperature difference is generated between it and the liquid cooling device 100, and then the heat is transferred to the liquid cooling device 100 by heat conduction; when there is a heat transfer temperature difference between the liquid cooling device 100 and the low-temperature fluid, the low-temperature fluid exchanges heat with the internal channel of the liquid cooling device 100 by convection heat transfer, and the low-temperature fluid absorbs heat to achieve temperature rise, and then the high-temperature coolant is discharged from the outlet of the liquid cooling device 100, and finally this part of the heat is released to the external environment through the external circulation system (such as a fan coil unit) to achieve the cooling process of the coolant. Repeat the above process to meet the heat dissipation requirements of the IPM power module.

[0109] An embodiment of the present invention further provides a vehicle, comprising a driving device and a controller according to any one of the above embodiments, wherein the controller is used to control the driving device.

[0110] The driving device may include an electric motor and a speed reducer.

[0111] A liquid cooling device, a controller and a vehicle according to the present invention have the following characteristics:

[0112] The liquid cooling device sets an input slit for the cooling channel. The input slit has a large passing size to ensure that the coolant enters the cooling channel evenly, which can effectively avoid the problem of uneven fluid distribution in the cooling channel, so that the liquid cooling device has excellent temperature uniformity. A first confluence pool is set between the input interface and the input slit. The coolant is collected in the first confluence pool before entering the input slit, which can form a sufficient flow of coolant entering the input slit, thereby improving the adequacy of the coolant entering the input slit.

[0113] A coolant inlet is set in the middle of the main cooling channel to ensure that the coolant enters the main cooling channel evenly and flows evenly from the central area of ​​the liquid cooling device to both sides, which can effectively avoid the problem of uneven fluid distribution in the main cooling channel.

[0114] The coolant flows in both directions in the main cooling channel and the auxiliary cooling channel, flowing from the central inlet area to both sides and then from both sides to the return area. Compared with the prior art, when the same mass flow rate of coolant flows through, the liquid cooling device using this bidirectional flow has excellent temperature uniformity performance and a smaller pressure drop in the channel.

[0115] The processes and steps described in all the above preferred embodiments are only examples. Unless adverse effects occur, various processing operations can be performed in a sequence different from the sequence of the above processes. The sequence of steps in the above processes can also be increased, merged or deleted according to actual needs.

[0116] In understanding the scope of the present invention, the term "comprise" and its derivatives as used herein are intended to be open terms, which specify the existence of recorded features, elements, components, groups, wholes and / or steps, but do not exclude the existence of other unrecorded features, elements, components, groups, wholes and / or steps. This concept also applies to words with similar meanings, such as the terms "include", "have" and their derivatives.

[0117] The terms "attached" or "attached" as used herein include: a configuration where an element is directly secured to another element by directly securing the element to the other element; a configuration where an element is indirectly secured to another element by securing the element to an intermediate member which in turn is secured to the other element; and a configuration where one element is integral with the other element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "fix," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent the amount of deviation that modifies the term such that the end result will not be significantly changed.

[0118] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. The features described herein in one embodiment may be applied to another embodiment individually or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0119] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A liquid cooling device, characterized in that: include: A shell (101), wherein a first confluence pool (109) and a cooling channel (102) are arranged inside the shell (101), wherein the first confluence pool (109) is located upstream of the cooling channel (102), and the first confluence pool (109) and the cooling channel (102) are connected via an input slit (105); an input interface (114) for coolant to enter the liquid cooling device is provided on the shell (101), and in a direction perpendicular to the flow direction of the coolant, the size of the input slit (105) is larger than the size of the input interface (114).

2. The liquid cooling device according to claim 1, characterized in that: A second confluence pool (110) is further provided inside the shell (101), and the second confluence pool (110) is located downstream of the cooling channel (102). The cooling channel (102) is further provided with an output slit (111), and the second confluence pool (110) is connected to the cooling channel (102) through the output slit (111).

3. The liquid cooling device according to claim 2, characterized in that: The cooling channel (102) comprises: a main cooling channel (103), wherein the inlet of the main cooling channel (103) is arranged in the middle of the main cooling channel (103), the outlet of the main cooling channel (103) is arranged at both ends of the main cooling channel (103), and the input slit (105) is connected to the inlet of the main cooling channel (103); and An auxiliary cooling channel (104), the auxiliary cooling channel (104) is parallel to the main cooling channel (103), the inlet of the auxiliary cooling channel (104) is arranged at both ends of the auxiliary cooling channel (104), the outlet of the auxiliary cooling channel (104) is arranged in the middle of the auxiliary cooling channel (104), and the output slit (111) is connected to the outlet of the auxiliary cooling channel (104).

4. The liquid cooling device according to claim 3, characterized in that: The auxiliary cooling channel (104) comprises: A first auxiliary cooling channel (1041) and a second auxiliary cooling channel (1042), wherein the main cooling channel (103) is arranged between the first auxiliary cooling channel (1041) and the second auxiliary cooling channel (1042).

5. The liquid cooling device according to claim 4, characterized in that: A first converging channel (106) is provided inside the housing (101) corresponding to the first end of the cooling channel (102), and the first converging channel (106) is connected to the outlet of the main cooling channel (103) on the same side and the inlet of the first auxiliary cooling channel (1041) and the inlet of the second auxiliary cooling channel (1042); A second converging channel (107) is provided inside the shell (101) corresponding to the second end of the cooling channel (102), and the second converging channel (107) connects the outlet of the main cooling channel (103) on the same side with the inlet of the first auxiliary cooling channel (1041) and the inlet of the second auxiliary cooling channel (1042).

6. The liquid cooling device according to claim 3, characterized in that: Also includes: a partition (108), the partition (108) being arranged inside the housing (101) and separating the first confluence pool (109), the second confluence pool (110) and the cooling channel (102); The output slit (111) comprises a first output slit (1111) and a second output slit (1112); the input slit (105), the first output slit (1111), and the second output slit (1112) are arranged in the middle of the partition (108); the first output slit (1111) is connected to the outlet of the first auxiliary cooling channel (1041), and the second output slit (1112) is connected to the outlet of the second auxiliary cooling channel (1042).

7. The liquid cooling device according to claim 6, characterized in that: Also includes: A baffle (116), the baffle (116) being arranged between the partition (108) and the top of the housing (101) and located in the middle of the partition (108), the baffle (116) being provided with a bend to separate the input slit (105) from the first output slit (1111) and the second output slit (1112), the input slit (105) being located on one side of the baffle (116), and the first output slit (1111) and the second output slit (1112) being located on the other side of the baffle (116).

8. The liquid cooling device according to claim 7, characterized in that: The input slit (105), the first output slit (1111) and the second output slit (1112) are located on a straight line, and the baffle (116) is provided with the bend corresponding to a position where the input slit (105) is adjacent to the first output slit (1111), and is provided with the bend corresponding to a position where the input slit (105) is adjacent to the second output slit (1112).

9. The liquid cooling device according to claim 8, characterized in that: The first confluence pool (109) and the input slit (105) are located on the same side of the baffle (116), and the second confluence pool (110) and the first output slit (1111) and the second output slit (1112) are located on the same side of the baffle (116).

10. The liquid cooling device according to claim 7, characterized in that: A first partition (117) is provided between the first auxiliary cooling channel (1041) and the main cooling channel (103), and a second partition (118) is provided between the second auxiliary cooling channel (1042) and the main cooling channel (103), and the first partition (117) and the second partition (118) are both connected to the baffle (116).

11. The liquid cooling device according to claim 7, characterized in that: The first output slit (1111) and the second output slit (1112) are both long strip-shaped holes; The input slit (105) is perpendicular to the main cooling channel (103), the first output slit (1111) is perpendicular to the first auxiliary cooling channel (1041), and the second output slit (1112) is perpendicular to the second auxiliary cooling channel (1042).

12. The liquid cooling device according to claim 6, characterized in that: The main cooling channel (103) includes a plurality of parallel sub-channels, the first auxiliary cooling channel (1041) includes a plurality of parallel sub-channels, and the second auxiliary cooling channel (1042) includes a plurality of parallel sub-channels.

13. The liquid cooling device according to claim 12, characterized in that: The cooling channel (102) comprises a plurality of parallel heat dissipation fins (119), adjacent heat dissipation fins (119) constitute the sub-channel, a first long side of the heat dissipation fin (119) is tightly connected to the partition (108), and a second long side of the heat dissipation fin (119) is tightly connected to the bottom of the housing (101).

14. The liquid cooling device according to claim 13, characterized in that: The density of the heat dissipation fins (119) in the main cooling channel (103) is greater than the density of the heat dissipation fins (119) in the first auxiliary cooling channel (1041) and the density of the heat dissipation fins (119) in the second auxiliary cooling channel (1042).

15. A controller, comprising a power module, characterized in that: It also comprises a liquid cooling device (100) according to any one of claims 1 to 14, wherein the power module is arranged on the outer wall of the housing (101), and a thermal conductive adhesive is arranged between the power module and the outer wall of the housing (101).

16. A vehicle comprising a drive device, characterized in that: Also included is a controller according to claim 15, wherein the controller is used to control the driving device.

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