Inverter and vehicle

Abstract

The utility model discloses an inverter, which comprises an electric module. The capacitor is arranged on one side of the electric module in the first direction, and the capacitor is electrically connected with the electric module; the first shell is arranged between the capacitor and the electric module in the first direction, the first shell comprises a cavity, a partition plate is arranged in the cavity, in the second direction, one side of the partition plate is not connected with the first shell to form a transition flow channel, and the other side of the partition plate is connected with the first shell; the cavity is divided into a first cooling flow channel and a second cooling flow channel in the first direction, and the transition flow channel communicates with the first cooling flow channel and the second cooling flow channel; and in the second direction, one side of the first shell comprises a liquid inlet and a liquid outlet, the liquid inlet communicates with the first cooling flow channel, the liquid outlet communicates with the second cooling flow channel, and in the second direction, the liquid inlet is away from the transition flow channel. According to the utility model, heat generated by elements in the inverter can be efficiently taken away.

Description

Technical Field

[0001] The utility model relates to the field of inverters, in particular to an inverter and a vehicle. Background Art

[0002] The inverter is a device that converts direct current into alternating current. When the inverter is working continuously, the components on the inverter will generate heat, and the heat will gather inside the inverter, causing the temperature to rise higher and higher. Excessive temperature will reduce the performance and life of the components, causing the inverter to easily fail. Especially for highly integrated inverters, the heat is more likely to be concentrated inside the inverter, and the heat dissipation requirements of the inverter are higher. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problem of how to improve the heat dissipation performance of the inverter. The utility model provides an inverter, which can efficiently take away the heat generated by the internal components of the inverter.

[0004] In order to solve the above technical problems, the embodiment of the utility model discloses an inverter, comprising:

[0005] Electric module;

[0006] A capacitor, along a first direction, the capacitor is arranged on one side of the electric module, and the capacitor is electrically connected to the electric module;

[0007] A first shell, along the first direction, the first shell is arranged between the capacitor and the electric module, the first shell includes a cavity, a partition plate is arranged in the cavity, along the second direction, one side of the partition plate is not connected to the first shell to form a transition channel, and the other side of the partition plate is connected to the first shell to divide the cavity into a first cooling channel and a second cooling channel in the first direction, and the transition channel connects the first cooling channel and the second cooling channel;

[0008] Along the second direction, one side of the first shell includes a liquid inlet and a liquid outlet, the liquid inlet is connected to the first cooling channel, and the liquid outlet is connected to the second cooling channel. Along the second direction, the liquid inlet is away from the transition channel, and the external coolant can flow from the liquid inlet through the first cooling channel, the transition channel, the second cooling channel and the liquid outlet in sequence.

[0009] By adopting the above technical scheme, the first shell is arranged between the capacitor and the electric module in the first direction, and the first cooling channel and the second cooling channel are arranged at intervals along the first direction, so that the capacitor and the electric module are respectively in contact with the first cooling channel and the second cooling channel, and the coolant flows from the liquid inlet through the first cooling channel, the second cooling channel, and the liquid outlet in sequence. In this way, on the one hand, after the coolant flows into the cavity, it needs to completely flow through the first cooling channel before it can enter the second cooling channel through the transition channel, and then flow out from the liquid outlet after completely flowing through the second cooling channel. This arrangement can effectively extend the residence time of the coolant in the inverter, so as to fully carry away the heat generated by the capacitor and the electric module through the first cooling channel and the second cooling channel respectively; on the other hand, the first cooling channel and the second cooling channel are separated by a partition plate to form a fixed flow path, and the coolant after absorbing heat can be discharged in time to avoid the coolant after absorbing heat staying in the cooling channel and reducing the cooling effect.

[0010] According to another specific embodiment of the utility model, the embodiment of the utility model discloses an inverter, the bottom wall is provided with a first protrusion and a second protrusion, along the third direction, the first protrusion and the second protrusion are arranged at intervals, along the first direction, the partition plate includes a first surface and a second surface arranged oppositely, the first protrusion abuts against the first surface, the second protrusion abuts against the first surface, and the second cooling flow channel is at least jointly defined by the first protrusion, the second protrusion, the first surface of the partition plate and the bottom wall.

[0011] According to another specific embodiment of the utility model, the embodiment of the utility model discloses an inverter, along the third direction, the first protrusion is spaced apart from the first side wall of the cavity to form a first connecting groove, the second protrusion is spaced apart from the second side wall of the cavity to form a second connecting groove, along the third direction, the partition plate includes a first connecting portion and a second connecting portion, the first connecting portion is arranged in the first connecting groove, the second connecting portion is arranged in the second connecting groove, and the first cooling channel is at least jointly defined by the first side wall, the second side wall, the second surface of the partition plate and the top wall of the first shell.

[0012] By adopting the above technical solution, the partition plate can serve as both a part of the first cooling channel and a part of the second cooling channel, and can reduce the height of the first cooling channel and the second cooling channel in the first direction, so that the height of the inverter as a whole in the first direction can be controlled, and the inverter can be installed in an area with limited space, thereby increasing the scope of application of the inverter.

[0013] According to another specific embodiment of the utility model, the embodiment of the utility model discloses an inverter, along the first direction, the electric module includes a power module, a shielding cover and a driving plate arranged in sequence, the power module is arranged on the side of the first cooling channel facing away from the second cooling channel, and the power module is electrically connected to the capacitor.

[0014] By adopting the above technical solution, various parts of the inverter are integrated into one, so that the inverter has a high degree of integration and is convenient for users to use and install.

[0015] According to another specific embodiment of the utility model, the embodiment of the utility model discloses an inverter, the power module includes a supporting portion, along the first direction, one side of the first shell has an opening, the supporting portion covers the opening of the first shell to form the top wall, along the first direction, the side of the supporting portion facing away from the driving plate includes a plurality of heat dissipation portions, and the plurality of heat dissipation portions are spaced apart in the first cooling channel.

[0016] By adopting the above technical solution, the power module is covered by the support part at the open part of the first shell, so that the support part can directly contact the coolant in the cooling channel to obtain a better cooling effect; in addition, the multiple heat dissipation parts of the support part are arranged at intervals in the first cooling channel, which can increase the contact area between the support part and the coolant and further improve the cooling effect.

[0017] According to another specific embodiment of the present utility model, the embodiment of the present utility model discloses an inverter, which includes a positive copper bar and a negative copper bar. Along the third direction, the positive copper bar and the negative copper bar are both arranged on one side of the capacitor, and the two ends of the positive copper bar are electrically connected to the power module and the capacitor respectively, and the two ends of the negative copper bar are electrically connected to the power module and the capacitor respectively.

[0018] The above technical solution can provide the inverter with a better layout.

[0019] An embodiment of the utility model further discloses a vehicle, which comprises at least the inverter in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An exploded diagram of an inverter provided in an embodiment of the present application is shown.

[0021] Figure 2 A schematic diagram showing the electrical connection between the positive copper busbar and the negative copper busbar of the inverter provided in an embodiment of the present application and a power module is shown.

[0022] Figure 3A three-dimensional schematic diagram of the positive copper busbar and the negative copper busbar of the inverter provided in an embodiment of the present application is shown.

[0023] Figure 4 A bottom view of the inverter provided in an embodiment of the present application is shown.

[0024] Figure 5 A front cross-sectional view of a first cooling channel of an inverter provided in an embodiment of the present application is shown.

[0025] Figure 6 A three-dimensional cross-sectional view of a first cooling channel of an inverter provided in an embodiment of the present application is shown.

[0026] Figure 7 A front cross-sectional view of a second cooling channel of an inverter provided in an embodiment of the present application is shown.

[0027] Figure 8 A three-dimensional cross-sectional view of a second cooling channel of an inverter provided in an embodiment of the present application is shown.

[0028] Fig. 9 A side cross-sectional view of an inverter provided in an embodiment of the present application is shown.

[0029] Fig.10 A simplified schematic diagram of a first housing and a support portion of an inverter provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0030] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0031] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0032] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0033] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0034] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0035] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] In some embodiments, see Figure 1 The present application provides an inverter, including an electric module 10 and a capacitor 20. The capacitor 20 is arranged on one side of the electric module 10 along a first direction X, and the capacitor 20 is electrically connected to the electric module 10. Exemplarily, along the first direction X, the electric module 10 includes a power module 101, a shielding cover 102, and a driving board 103 arranged in sequence, and the power module 101 is electrically connected to the capacitor 20.

[0037] In some embodiments, see Figure 1 , Figure 2 , Figure 3 , the inverter includes a positive copper bar 30 and a negative copper bar 40. Along the third direction Z, the positive copper bar 30 and the negative copper bar 40 are both arranged on one side of the capacitor 20. The two ends of the positive copper bar 30 are electrically connected to the power module 101 and the capacitor 20, respectively. The two ends of the negative copper bar 40 are electrically connected to the power module 101 and the capacitor 20, respectively. Exemplarily, the positive copper bar 30 includes a first end 301 and a second end 302, and the negative copper bar 40 includes a third end 401 and a fourth end 402. The first end 301 of the positive copper bar 30 and the third end 401 of the negative copper bar 40 are arranged inside the capacitor 20 ( Fig. 9As shown), the second end 302 of the positive copper bar 30 and the fourth end 402 of the negative copper bar 40 are electrically connected to the PCB board 1014 of the power module 101.

[0038] In some embodiments, the positive copper bar 30 includes a fifth end 303, and the negative copper bar 40 includes a sixth end 403. The fifth end 303 and the sixth end 403 are both convexly disposed on the side of the capacitor 20 along the third direction Z, and are used to be electrically connected to a DC power source such as a battery pack. Exemplarily, an insulating plate 50 is further disposed between the positive copper bar 30 and the negative copper bar 40 to prevent the positive copper bar 30 and the negative copper bar 40 from short-circuiting.

[0039] In some embodiments, see Figure 4 , Figure 5 , Figure 6 Combined with Figure 1 The inverter includes a first housing 60. Along the first direction X, the first housing 60 is disposed between the capacitor 20 and the electric module 10. The first housing 60 includes a cavity 601 ( Fig.10 ), a partition plate 602 is provided in the cavity 601, along the second direction Y, one side of the partition plate 602 is not connected to the first shell 60 to form a transition channel 609, and the other side of the partition plate 602 is connected to the first shell 60 to divide the cavity 601 into a first cooling channel 603 and a second cooling channel 604 in the first direction X, and the transition channel 609 connects the first cooling channel 603 and the second cooling channel 604;

[0040] Along the second direction Y, one side of the first shell 60 includes a liquid inlet 6031 and a liquid outlet 6041, the liquid inlet 6031 is connected to the first cooling channel 603, and the liquid outlet 6041 is connected to the second cooling channel 604. Along the second direction Y, the liquid inlet 6031 is away from the transition channel 609, and the external coolant can flow from the liquid inlet 6031 through the first cooling channel 603, the transition channel 609, the second cooling channel 604 and the liquid outlet 6041 in sequence.

[0041] By adopting the above technical solution, the first shell 60 is arranged between the capacitor 20 and the electric module 10 in the first direction X, and the first cooling channel 603 and the second cooling channel 604 are arranged at intervals along the first direction X, so that the capacitor 20 and the electric module 10 are in contact with the first cooling channel 603 and the second cooling channel 604 respectively, and the coolant flows from the liquid inlet 6031 through the first cooling channel 603, the second cooling channel 604, and the liquid outlet 6041 in sequence. In this way, on the one hand, the residence time of the coolant in the inverter is extended to fully carry away the heat generated by the capacitor 20 and the electric module 10 through the first cooling channel 603 and the second cooling channel 604 respectively; on the other hand, the first cooling channel 603 and the second cooling channel 604 are separated by the partition plate 602 and form a fixed flow path, so that the coolant after absorbing heat can be discharged in time, avoiding the coolant after absorbing heat staying in the cooling channel and reducing the cooling effect.

[0042] In some embodiments, see Figure 1 , Figure 2 , Figure 3 The driving board 103 is a PCB circuit board, and the driving board 103 has a driving circuit, and the driving board 103 is electrically connected to the power module 101, and is used to drive the various components of the inverter module 101 to work normally, and convert direct current into alternating current output. In some embodiments, the shielding cover 102 includes an electromagnetic shielding plate, and the shielding cover 102 covers the surface of the power module 101, and is arranged between the power module 101 and the driving board 103, and is used to avoid electromagnetic interference between the driving board 103 and the power module 101, thereby improving the EMC performance (i.e., electromagnetic compatibility, Electromagnetic Compatibility) of the inverter module.

[0043] In some embodiments, the power module 101 includes a three-phase output copper bus 1011, which includes three independent copper buses. The three copper buses are arranged at intervals along the second direction Y. Along the third direction Z, one end of the three copper buses is respectively connected to the power output ends of the three phases, and the other end extends out of the power module 101 to output the AC power obtained through the inverter to the electrical appliance. For example, the AC power obtained through the inverter can be output to the vehicle motor for use.

[0044] In some embodiments, the inverter includes a second housing 70, the capacitor 20 is disposed in the second housing 70, the second housing 70 is arranged in a rectangular parallelepiped shape, and along the first direction X, the first housing 60 is convexly disposed on one side of the second housing 70. Exemplarily, the first housing 60 and the second housing 70 are integrally arranged. It can be understood that the present application does not limit the shape of the second housing 70, for example, it can also be other shapes such as a cylinder.

[0045] In some embodiments, see Figure 4The first housing 60 includes a first extension portion 605, which is extended along the second direction Y and staggered with the second housing 70 in the first direction X. The liquid inlet 6031 and the liquid outlet 6041 are both provided in the first extension portion 605. Figure 5 , Figure 6 , Figure 7 The first shell 60 includes a second extension portion 606 , which is extended along the first direction X. A liquid inlet channel 6061 and a liquid outlet channel 6062 are provided on the second extension portion 606 . The liquid inlet channel 6061 is connected to the liquid inlet port 6031 , and the liquid outlet channel 6062 is connected to the liquid outlet port 6041 .

[0046] In some embodiments, see Figure 5 , Figure 6 The first cooling channel 603 extends along the second direction Y, and the cooling liquid flows along Figure 5 The cooling liquid flows in the direction indicated by the arrow in the figure, and flows through the liquid inlet channel 6061 and the liquid inlet port 6031 in sequence and flows into the first cooling channel 603. Figure 7 , Figure 8 The second cooling channel 604 extends along the second direction Y, and the cooling liquid flows along Figure 7 The coolant flows in the direction indicated by the arrow in the figure, and the coolant flows from the second cooling channel 604 through the liquid outlet 6041 and the liquid outlet channel 6062 in sequence. Figure 8 A schematic diagram showing the flow of the coolant sequentially passing through the first cooling channel 603 , the second cooling channel 604 , the liquid outlet 6041 , and the liquid outlet channel 6062 is shown.

[0047] In some embodiments, see Fig. 9 , Fig.10 The bottom wall 6010 of the cavity 601 is provided with a first convex portion 6011 and a second convex portion 6012. The first convex portion 6011 and the second convex portion 6012 are arranged at intervals along the third direction Z. The partition plate 602 includes a first surface 6021 and a second surface 6022 arranged opposite to each other along the first direction X. The first convex portion 6011 abuts against the first surface 6021, and the second convex portion 6012 abuts against the first surface 6021. The second cooling channel 604 is defined by at least the first convex portion 6011, the second convex portion 6012, the first surface 6021 of the partition plate 602, and the bottom wall 6010.

[0048] In some embodiments, see Fig. 9 , Fig.10, along the third direction Z, the first convex portion 6011 is spaced apart from the first side wall 6013 of the cavity 601 to form a first connection groove 6015, the second convex portion 6012 is spaced apart from the second side wall 6014 of the cavity 601 to form a second connection groove 6016, the two ends of the partition plate 602 in the third direction Z are respectively arranged at the first connection groove 6015 and the second connection groove 6016, and the first cooling channel 603 is at least defined by the first side wall 6013, the second side wall 6014, the second surface 6022 of the partition plate 602 and the top wall of the first shell 60. Exemplarily, the partition plate 602 includes a first connection portion 6023 and a second connection portion 6024, the first connection portion 6023 and the second connection portion 6024 are arranged on both sides of the partition plate 602 in the third direction Z, the first connection portion 6023 is arranged at the first connection groove 6015, and the second connection portion 6024 is arranged at the second connection groove 6016.

[0049] In some embodiments, see Fig. 9 , Fig.10 , the power module 101 is arranged on the side of the first cooling channel 603 facing away from the second cooling channel 604. Exemplarily, along the first direction X, the side of the power module 101 facing away from the three-phase output copper bar 1011 includes a support portion 1012, the first housing 60 has an opening 607 on one side of the first direction X, the support portion 1012 covers the opening 607 of the first housing 60 to form a top wall, and along the first direction X, the side of the support portion 1012 facing away from the driving board 103 includes a plurality of heat dissipation portions 1013, and the plurality of heat dissipation portions 1013 are arranged in the first cooling channel 603 at intervals.

[0050] Exemplarily, the heat dissipation portion 1013 is cylindrically arranged, and along the first direction X, the side of the support portion 1012 facing away from the driving board 103 includes multiple groups of heat dissipation portions 1013 arranged at intervals along the third direction Z, and each group of heat dissipation portions 1013 includes multiple heat dissipation portions 1013 arranged at intervals along the second direction Y. Exemplarily, 13 groups of heat dissipation portions 1013 are arranged in the third direction Z, and each group of heat dissipation portions 1013 includes 21 heat dissipation portions 1013 in the second direction Y. It can be understood that the present application does not limit the shape and number of the heat dissipation portions 1013. For example, the heat dissipation portion 1013 can also be set to other shapes such as a rectangular parallelepiped. The support portion 1012 can include 1, 2, 3, 4, 5, 6, 7 groups of heat dissipation portions 1013, and each group of heat dissipation portions 1013 can include 1, 2, 3, 4, 5, 6, 7 groups of heat dissipation portions 1013, and the like.

[0051] In some embodiments, see Fig. 9 Combination Figure 1As shown, along the first direction X, a sealing groove 608 is provided on one side of the first housing 60 facing the power module 101, and a sealing ring 6081 is provided in the sealing groove 608, and the sealing ring 6081 abuts against the support portion 1012. By way of example, the sealing groove 608 and the sealing ring 6081 are arranged around the opening 607. By arranging the sealing ring 6081 between the support portion 1012 and the second housing 70, it is possible to prevent the coolant in the first cooling channel 603 from leaking and causing damage to the circuit in the inverter module, thereby improving the safety of the inverter module. By way of example, both the sealing groove 608 and the sealing ring 6081 can be annular, and the present application does not limit the shape and size of the sealing groove 608 and the sealing ring 6081.

[0052] The present application also provides a vehicle, comprising at least the inverter in any of the aforementioned embodiments.

[0053] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An inverter, characterized in that: include: Electric module; A capacitor, along a first direction, the capacitor is arranged on one side of the electric module, and the capacitor is electrically connected to the electric module; A first shell, along the first direction, the first shell is arranged between the capacitor and the electric module, the first shell includes a cavity, a partition plate is arranged in the cavity, along the second direction, one side of the partition plate is not connected to the first shell to form a transition channel, and the other side of the partition plate is connected to the first shell to divide the cavity into a first cooling channel and a second cooling channel in the first direction, and the transition channel connects the first cooling channel and the second cooling channel; Along the second direction, one side of the first shell includes a liquid inlet and a liquid outlet, the liquid inlet is connected to the first cooling channel, and the liquid outlet is connected to the second cooling channel. Along the second direction, the liquid inlet is away from the transition channel, and the external coolant can flow from the liquid inlet through the first cooling channel, the transition channel, the second cooling channel and the liquid outlet in sequence.

2. The inverter according to claim 1, characterized in that: The bottom wall of the cavity is provided with a first protrusion and a second protrusion, and along the third direction, the first protrusion and the second protrusion are arranged at intervals. Along the first direction, the partition plate includes a first surface and a second surface arranged opposite to each other, the first protrusion abuts against the first surface, and the second protrusion abuts against the first surface. The second cooling channel is at least jointly defined by the first protrusion, the second protrusion, the first surface of the partition plate and the bottom wall.

3. The inverter according to claim 2, characterized in that: Along the third direction, the first protrusion is spaced apart from the first side wall of the cavity to form a first connecting groove, and the second protrusion is spaced apart from the second side wall of the cavity to form a second connecting groove. Along the third direction, the partition plate includes a first connecting portion and a second connecting portion, the first connecting portion is arranged in the first connecting groove, and the second connecting portion is arranged in the second connecting groove. The first cooling channel is at least jointly defined by the first side wall, the second side wall, the second surface of the partition plate and the top wall of the first shell.

4. The inverter according to claim 3, characterized in that: Along the first direction, the electric module includes a power module, a shielding cover and a driving board arranged in sequence, the power module is arranged on a side of the first cooling channel facing away from the second cooling channel, and the power module is electrically connected to the capacitor.

5. The inverter according to claim 4, characterized in that: The power module includes a supporting portion, and along the first direction, one side of the first shell has an opening, the supporting portion covers the opening of the first shell to form the top wall, and along the first direction, the side of the supporting portion facing away from the driving plate includes a plurality of heat dissipation portions, and the plurality of heat dissipation portions are spaced apart in the first cooling channel.

6. The inverter according to claim 5, characterized in that: The inverter includes a positive copper bar and a negative copper bar. Along the third direction, the positive copper bar and the negative copper bar are both arranged on one side of the capacitor, two ends of the positive copper bar are electrically connected to the power module and the capacitor respectively, and two ends of the negative copper bar are electrically connected to the power module and the capacitor respectively.

7. A vehicle, characterized in that: Comprising the inverter as described in any one of claims 1-6.

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