Electric energy conversion device

Abstract

The utility model provides an electric energy conversion device, comprising a switch box comprising a plurality of groups of first wiring terminals; and at least two electric energy conversion devices, each electric energy conversion device comprises a group of second wiring terminals, the first wiring terminals and the second wiring terminals are arranged in a one-to-one correspondence manner, and the first wiring terminals and the corresponding second wiring terminals are electrically connected, so that the switch box is electrically connected with the plurality of electric energy conversion devices respectively. Through the scheme, the problems of large occupied space and high cost of the electric energy conversion equipment when the same electric energy conversion device corresponds to two switch boxes in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric energy conversion equipment, and in particular to an electric energy conversion equipment. Background Art

[0002] The electric energy conversion equipment includes an electric energy conversion device and an electric energy conversion device box. In the prior art, one electric energy conversion device corresponds to one switch box, that is, one switch box controls the on and off of one electric energy conversion device. When multiple electric energy conversion devices are required to operate, the number of switch boxes of the electric energy conversion equipment is large, which occupies a large space and has a high cost. Utility Model Content

[0003] The utility model provides an electric energy conversion device to solve the problem in the prior art that when one electric energy conversion device corresponds to one switch box, the electric energy conversion device occupies a large space and has a high cost.

[0004] The utility model provides an electric energy conversion device, which comprises: a switch box, comprising a plurality of groups of first wiring terminals; at least two electric energy conversion devices, each electric energy conversion device comprising a group of second wiring terminals, the number of first wiring terminals and the number of second wiring terminals, a group of first wiring terminals and a corresponding group of second wiring terminals are electrically connected so that the switch box is electrically connected to the plurality of electric energy conversion devices respectively.

[0005] Furthermore, the switch box includes: a shell body provided with an installation opening; an insulating plate provided at the installation opening, and a plurality of first connecting terminals and a plurality of second connecting terminals are respectively provided on the insulating plate.

[0006] Furthermore, the first wiring terminal is arranged on the top of the switch box; and the second wiring terminal is arranged on the top of the electric energy conversion device.

[0007] Furthermore, the first terminal includes a first output terminal and a first input terminal, the second terminal includes a second input terminal and a second output terminal, the first output terminal and the second input terminal are electrically connected, and the second output terminal and the first input terminal are electrically connected; multiple first output terminals are distributed side by side, and multiple second output terminals are distributed side by side.

[0008] Furthermore, the plurality of first output terminals and the plurality of first input terminals have the same height; the second input terminals and the second output terminals have the same height.

[0009] Furthermore, the switch box and at least two electric energy conversion devices are arranged side by side.

[0010] Furthermore, the plurality of first connecting terminals are respectively arranged on one side of the switch box facing at least two electric energy conversion devices, and the second connecting terminals are arranged on one side of the electric energy conversion device facing the switch box.

[0011] Furthermore, the electric energy conversion device also includes: a cooling liquid channel, at least part of which is arranged in the electric energy conversion device; an adapter box, which is arranged on the switch box, and the adapter box includes independent liquid inlet channels and liquid outlet channels, the liquid inlet channel is connected to the liquid inlet of the cooling liquid channel, and the liquid outlet channel is connected to the liquid outlet of the cooling liquid channel.

[0012] Further, the adapter box includes: a first adapter box, including a liquid inlet channel, the liquid inlet channel is provided with a first inlet and multiple first outlets, and the multiple first outlets are respectively connected to the liquid inlets of the multiple cooling liquid channels; a second adapter box, including a liquid outlet channel, the liquid outlet channel is provided with a second outlet and multiple second inlets, and the multiple second inlets are respectively connected to the liquid outlets of the multiple cooling liquid channels.

[0013] Further, the electric energy conversion device includes a first electric energy conversion device and a second electric energy conversion device, and the cooling liquid channel includes a first cooling liquid channel and a second cooling liquid channel; the first cooling liquid channel includes a first liquid inlet pipe, a first liquid cooling pipe and a first liquid outlet pipe which are connected in sequence, the first liquid cooling pipe is arranged in the first electric energy conversion device, the first liquid inlet pipe and the first liquid outlet pipe are respectively located on the outside of the first electric energy conversion device, the first liquid inlet pipe is connected to the liquid inlet channel, and the first liquid outlet pipe is connected to the liquid outlet channel; the second cooling liquid channel includes a second liquid inlet pipe, a second liquid cooling pipe and a second liquid outlet pipe which are connected in sequence, the second liquid cooling pipe is arranged in the second electric energy conversion device, the second liquid inlet pipe and the second liquid outlet pipe are respectively located on the outside of the second electric energy conversion device, the second liquid inlet pipe is connected to the liquid inlet channel, and the second liquid outlet pipe is connected to the liquid outlet channel.

[0014] Furthermore, the switch box, the first electric energy conversion device and the second electric energy conversion device are arranged side by side; the first liquid inlet pipe and the first liquid outlet pipe are respectively located between the switch box and the first electric energy conversion device; at least part of the second liquid inlet pipe and the second liquid outlet pipe are located at the bottom of the first electric energy conversion device.

[0015] By applying the technical solution of the utility model, one switch box can correspond to multiple electric energy conversion devices. Specifically, one switch box includes at least two groups of first wiring terminals, and each electric energy conversion device includes a group of second wiring terminals, and the first wiring terminals and the second wiring terminals are arranged one by one. Such an arrangement enables one switch box to be used in conjunction with multiple electric energy conversion devices. When encountering an application scenario with a large number of electric energy conversion devices, the number of switch boxes can be reduced, the cost is reduced, and the space occupied by the electric energy conversion device is reduced. In the traditional technical solution, one electric energy conversion device is used in conjunction with one switch box. When there are many application scenarios with many electric energy conversion devices, the number of switch boxes is large, resulting in an increase in cost, and the overall electric energy conversion device occupies a large space. Compared with the traditional technical solution, in this solution, one switch box is used in conjunction with at least two electric energy conversion devices. In the scenario with a large number of electric energy conversion devices, the cost of the device can be reduced, the floor space of the device can be reduced, and the solution of the present application is more adaptable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A top view of the electric energy conversion device provided by the utility model is shown;

[0018] Figure 2 A partial structural front view of the electric energy conversion device provided by the utility model is shown;

[0019] Figure 3 A partial rear view of the structure of the electric energy conversion device provided by the utility model is shown;

[0020] Figure 4 The schematic diagram of the structure of the switch box provided by the utility model is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. switch box; 101. first output terminal; 102. first input terminal;

[0023] 11. Shell;

[0024] 121, a first insulating plate; 122, a second insulating plate;

[0025] 20. Electric energy conversion device; 201. Second input terminal; 202. Second output terminal;

[0026] 21. A first electric energy conversion device; 22. A second electric energy conversion device;

[0027] 31. First adapter box; 311. First inlet; 312. First outlet;

[0028] 32. Second adapter box; 321. Second inlet; 322. Second outlet;

[0029] 41. first liquid inlet pipe; 42. first liquid outlet pipe; 43. second liquid inlet pipe; 44. second liquid outlet pipe;

[0030] 51. First cable; 52. Second cable. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figures 1 to 3 As shown, the embodiment of the utility model provides an electric energy conversion device, which includes a switch box 10 and at least two electric energy conversion devices 20. The switch box 10 includes multiple groups of first wiring terminals. Each electric energy conversion device 20 includes a group of second wiring terminals, the number of the first wiring terminals is the same as the number of the second wiring terminals, and a group of first wiring terminals is electrically connected to a corresponding group of second wiring terminals, so that the switch box 10 is electrically connected to multiple electric energy conversion devices 20 respectively.

[0033] By applying the technical solution of the present utility model, one switch box 10 can correspond to multiple electric energy conversion devices 20. Specifically, one switch box 10 includes at least two groups of first wiring terminals, and each electric energy conversion device 20 includes a group of second wiring terminals, and the first wiring terminals and the second wiring terminals are arranged in a one-to-one correspondence. Such an arrangement enables one switch box 10 to be used in conjunction with multiple electric energy conversion devices 20. When there are many application scenarios of electric energy conversion devices 20, the number of switch boxes 10 can be reduced, the cost is reduced, and the space occupied by the electric energy conversion equipment is reduced. Compared with the traditional technical solution, in this solution, at least two electric energy conversion devices 20 share one switch box 10. In the scenario where there are a large number of electric energy conversion devices 20, the cost of the device can be reduced, the floor space of the device can be reduced, and the solution of the present application has a wider adaptability.

[0034] like Figure 1 and Figure 4As shown, specifically, the first terminal includes a first output terminal 101 and a first input terminal 102, the second terminal includes a second input terminal 201 and a second output terminal 202, the first output terminal 101 and the second input terminal 201 are electrically connected, and the second output terminal 202 and the first input terminal 102 are electrically connected.

[0035] Furthermore, the electric energy conversion device further includes a first cable 51 and a second cable 52 , the first output terminal 101 and the second input terminal 201 are connected via the first cable 51 , and the second output terminal 202 and the first output terminal 101 are connected via the second cable 52 .

[0036] In this solution, the switch box 10 includes a housing 11 and an insulating plate. The housing 11 is provided with an installation opening, the insulating plate is provided at the installation opening, and a plurality of first wiring terminals and a plurality of second wiring terminals are provided on the insulating plate, respectively. In this embodiment, the insulating plate is made of rubber material, and such a configuration makes the insulating plate have good flexibility, which is convenient for improving the convenience and reliability of wiring operations, and the protection level of the insulating plate is high.

[0037] In this embodiment, multiple groups of insulating plates are provided, and one group of insulating plates corresponds to one group of first wiring terminals. Each group of insulating plates includes a first insulating plate 121 and a second insulating plate 122, and the first output wiring terminal 101 is installed on the first insulating plate 121, and the first input wiring terminal 102 is installed on the second insulating plate 122. Multiple mounting ports are provided, and each mounting port corresponds to an insulating plate. Such a configuration can improve the convenience of repairing or replacing the first output wiring terminal 101 and the first input wiring terminal 102.

[0038] In this solution, the insulating plate and the shell 11 are detachably connected, and can be connected specifically by means of fasteners, plug-in or snap-in.

[0039] In this embodiment, the power conversion device further includes a tray, and the switch box 10 and at least two power conversion devices 20 are arranged on the top surface of the tray at intervals along the length direction of the horizontal tray, and all the power conversion devices 20 are arranged on the same side of the switch box 10. Such an arrangement facilitates the determination and integration of the positions of the switch box 10 and the at least two power conversion devices 20.

[0040] like Figures 1 to 3As shown, in this embodiment, the first terminal is arranged at the top of the side wall of the switch box 10. The second terminal is arranged on the top surface of the electric energy conversion device 20. That is, in this embodiment, the first output terminal 101 and the first input terminal 102 are arranged at the top of the side wall of the switch box 10, and the second input terminal 201 and the second output terminal 202 are arranged on the top surface of the electric energy conversion device 20. Such an arrangement can improve the convenience of connecting the first output terminal 101 and the second input terminal 201, and improve the convenience of connecting the second output terminal 202 with the first input terminal 102.

[0041] In this embodiment, except for the power conversion device 20 closest to the switch box 10, the first cables 51 and the second cables 52 corresponding to the remaining power conversion devices 20 extend from the switch box 10 to the power conversion device 20, and are located above the power conversion device 20 between the switch box 10 and the power conversion device 20. This arrangement facilitates the connection between each cable and each terminal.

[0042] Further, a plurality of first terminals are respectively arranged on one side of the switch box 10 facing at least two power conversion devices 20, and a second terminal is arranged on one side of the power conversion device 20 facing the switch box 10. Such an arrangement can facilitate the arrangement of various cables and ensure the compactness of the structure.

[0043] like Figure 1 and Figure 4 As shown, in this embodiment, the plurality of first output terminals 101 and the plurality of first input terminals 102 have the same height, and the plurality of first output terminals 101 are compactly arranged, and the plurality of second output terminals 202 are compactly arranged. The second input terminals 201 and the second output terminals 202 have the same height. The distribution direction from the plurality of first output terminals 101 to the plurality of first input terminals 102 is the same as the distribution direction from the second input terminals 201 to the second output terminals 202. Such a configuration can facilitate the determination of the positions of the first output terminals 101 and the second output terminals 202, facilitate the connection of the first output terminals 101 and the second input terminals 201, and facilitate the connection of the second output terminals 202 and the first input terminals 102. In addition, it can avoid the cross distribution between the cables connecting the various terminals.

[0044] Furthermore, the electric energy conversion device also includes a cooling liquid channel and an adapter box. The cooling liquid channel is arranged in the electric energy conversion device 20. The adapter box is arranged on the switch box 10, and the adapter box includes a liquid inlet channel and a liquid outlet channel that are independent of each other, and the liquid inlet channel is respectively connected to the liquid inlets of multiple cooling liquid channels, and the liquid outlet channel is respectively connected to the liquid outlets of multiple cooling liquid channels. Such an arrangement enables the electric energy conversion device 20 to achieve liquid cooling and improve the heat dissipation effect of the electric energy conversion device 20. Since the adapter box is arranged on the switch box 10, and the cooling liquid is also circulated in the adapter box, such an arrangement can enable the cooling liquid in the adapter box to achieve cooling of the switch box 10. In addition, the above arrangement can improve the structural compactness of the device.

[0045] like Figures 1 to 4 As shown, in this embodiment, the adapter box includes a first adapter box 31 and a second adapter box 32. The first adapter box 31 includes a liquid inlet channel, and the liquid inlet channel is provided with a first inlet 311 and a plurality of first outlets 312, and the plurality of first outlets 312 are respectively connected to the liquid inlets of the plurality of cooling liquid channels. The second adapter box 32 is separately provided with the first adapter box 31, and the second adapter box 32 includes a liquid outlet channel, and the liquid outlet channel is provided with a second outlet 322 and a plurality of second inlets 321, and the plurality of second inlets 321 are respectively connected to the liquid outlets of the plurality of cooling liquid channels.

[0046] Further, the electric energy conversion device 20 includes a first electric energy conversion device 21 and a second electric energy conversion device 22, and the cooling liquid channel includes a first cooling liquid channel and a second cooling liquid channel; the first cooling liquid channel includes a first liquid inlet pipe 41, a first liquid cooling pipe and a first liquid outlet pipe 42 which are connected in sequence, the first liquid cooling pipe is arranged in the first electric energy conversion device 21, the first liquid inlet pipe 41 and the first liquid outlet pipe 42 are respectively located on the outside of the first electric energy conversion device 21, the first liquid inlet pipe 41 is connected to the liquid inlet channel, and the first liquid outlet pipe 42 is connected to the liquid outlet channel, the second cooling liquid channel includes a second liquid inlet pipe 43, a second liquid cooling pipe and a second liquid outlet pipe 44 which are connected in sequence, the second liquid cooling pipe is arranged in the second electric energy conversion device 22, the second liquid inlet pipe 43 and the second liquid outlet pipe 44 are respectively located on the outside of the second electric energy conversion device 22, the second liquid inlet pipe 43 is connected to the liquid inlet channel, and the second liquid outlet pipe 44 is connected to the liquid outlet channel. Such an arrangement facilitates the communication between the two ends of the first cooling liquid channel and the liquid inlet channel and the liquid outlet channel respectively, and also facilitates the communication between the two ends of the second cooling liquid channel and the liquid inlet channel and the liquid outlet channel respectively.

[0047] Specifically, the switch box 10, the first power conversion device 21 and the second power conversion device 22 are arranged side by side, and the first liquid inlet pipe 41 and the first liquid outlet pipe 42 are respectively located between the switch box 10 and the first power conversion device 21. The second liquid inlet pipe 43 and the second liquid outlet pipe 44 are respectively located at the bottom of the first power conversion device 21. In this way, the second liquid inlet pipe 43 and the second liquid outlet pipe 44 can be at least partially located at the bottom of the second power conversion device 22, and the second liquid inlet pipe and the second liquid outlet pipe 44 can be separated from the cable, so as to avoid the situation that the line layout is chaotic or crossed due to the liquid inlet pipe, the liquid outlet pipe and the cable being located on the same side of the second power conversion device. In addition, the second liquid inlet pipe 43 and the second liquid outlet pipe 44 are relatively long, and they are arranged at the bottom of the first power conversion device 21, and are surrounded by metal on three sides. Due to the high strength of the metal, the water pipe can be effectively protected from being squeezed, thereby improving the safety of the liquid cooling water pipe.

[0048] In this embodiment, the first adapter box 31 and the second adapter box 32 are respectively arranged on two side walls of the switch box 10 that are arranged oppositely along the width direction of the tray. The liquid inlet and the liquid outlet of the coolant channel are respectively arranged at two ends of the electric energy conversion device 20 that are arranged oppositely along the width direction of the tray. The first adapter box 31 and the liquid inlet of the coolant channel are arranged correspondingly, and the second adapter box 32 and the liquid outlet of the coolant channel are arranged correspondingly. Such an arrangement can avoid the situation where multiple pipelines cross each other, and improve the rationality of the distribution of multiple pipelines.

[0049] In this embodiment, the second liquid inlet pipe 43 and the second liquid outlet pipe 44 are located in the space between the tray and the first electric energy conversion device 21. In this arrangement, although the second liquid inlet pipe 43 and the second liquid outlet pipe 44 are relatively long, they are fixedly arranged between the first electric energy conversion device 21 and the tray, and are surrounded by metal on the top and bottom. Due to the high strength of the metal, the liquid cooling water pipe can be effectively protected from being squeezed, thereby improving the safety of the liquid cooling water pipe.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0052] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0053] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0054] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0055] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electric energy conversion device, characterized in that: include: A switch box (10) comprising at least two groups of first connecting terminals; At least two electric energy conversion devices (20), each of the electric energy conversion devices (20) comprising a group of second wiring terminals, the number of the first wiring terminals being the same as the number of the second wiring terminals, a group of first wiring terminals being electrically connected to a corresponding group of second wiring terminals, so that the switch box (10) is electrically connected to the plurality of electric energy conversion devices (20) respectively.

2. The electric energy conversion device according to claim 1, characterized in that: The switch box (10) comprises: The housing (11) is provided with a mounting opening; An insulating plate is arranged at the installation opening, and a plurality of the first connecting terminals and a plurality of the second connecting terminals are respectively arranged on the insulating plate.

3. The electric energy conversion device according to claim 1, characterized in that: The first wiring terminal is arranged on the top of the switch box (10); The second connection terminal is arranged on the top of the electric energy conversion device (20).

4. The electric energy conversion device according to claim 3, characterized in that: The first wiring terminal comprises a first output wiring terminal (101) and a first input wiring terminal (102); the second wiring terminal comprises a second input wiring terminal (201) and a second output wiring terminal (202); the first output wiring terminal (101) and the second input wiring terminal (201) are electrically connected, and the second output wiring terminal (202) and the first input wiring terminal (102) are electrically connected; a plurality of the first output wiring terminals (101) are arranged side by side, and a plurality of the second output wiring terminals (202) are arranged side by side.

5. The electric energy conversion device according to claim 4, characterized in that: The plurality of first output wiring terminals (101) and the plurality of first input wiring terminals (102) have the same height; The second input terminal (201) and the second output terminal (202) have the same height.

6. The electric energy conversion device according to claim 1, characterized in that: The switch box (10) and at least two of the electric energy conversion devices (20) are arranged side by side.

7. The electric energy conversion device according to claim 6, characterized in that: The plurality of first connection terminals are respectively arranged on a side of the switch box (10) facing at least two of the electric energy conversion devices (20), and the second connection terminals are arranged on a side of the electric energy conversion device (20) facing the switch box (10).

8. The electric energy conversion device according to claim 1, characterized in that: The electric energy conversion device also includes: A cooling liquid channel, at least part of which is arranged in the electric energy conversion device (20); An adapter box is arranged on the switch box (10), the adapter box comprising a liquid inlet channel and a liquid outlet channel which are independent of each other, the liquid inlet channel is connected to the liquid inlet of the cooling liquid channel, and the liquid outlet channel is connected to the liquid outlet of the cooling liquid channel.

9. The electric energy conversion device according to claim 8, characterized in that: The adapter box comprises: A first adapter box (31), comprising the liquid inlet channel, wherein the liquid inlet channel is provided with a first inlet (311) and a plurality of first outlets (312), and the plurality of first outlets (312) are respectively connected to the liquid inlets of the plurality of cooling liquid channels; The second adapter box (32) comprises the liquid outlet channel, wherein the liquid outlet channel is provided with a second outlet (322) and a plurality of second inlets (321), and the plurality of second inlets (321) are respectively connected to the liquid outlets of the plurality of cooling liquid channels.

10. The electric energy conversion device according to claim 8, characterized in that: The electric energy conversion device (20) comprises a first electric energy conversion device (21) and a second electric energy conversion device (22), and the coolant channel comprises a first coolant channel and a second coolant channel; The first cooling liquid channel comprises a first liquid inlet pipe (41), a first liquid cooling pipe and a first liquid outlet pipe (42); the first liquid cooling pipe is arranged in the first electric energy conversion device (21); the first liquid inlet pipe (41) and the first liquid outlet pipe (42) are respectively located outside the first electric energy conversion device (21); the first liquid inlet pipe (41) is connected to the liquid inlet channel, and the first liquid outlet pipe (42) is connected to the liquid outlet channel; The second cooling liquid channel comprises a second liquid inlet pipe (43), a second liquid cooling pipe and a second liquid outlet pipe (44); the second liquid cooling pipe is arranged in the second electric energy conversion device (22); the second liquid inlet pipe (43) and the second liquid outlet pipe (44) are respectively located on the outside of the second electric energy conversion device (22); the second liquid inlet pipe (43) is connected to the liquid inlet channel, and the second liquid outlet pipe (44) is connected to the liquid outlet channel.

11. The electric energy conversion device according to claim 10, characterized in that: The switch box (10), the first electric energy conversion device (21) and the second electric energy conversion device (22) are arranged side by side; the first liquid inlet pipe (41) and the first liquid outlet pipe (42) are respectively located between the switch box (10) and the first electric energy conversion device (21); and at least part of the second liquid inlet pipe (43) and the second liquid outlet pipe (44) are located at the bottom of the first electric energy conversion device (21).

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