Cooling device of oil-immersed power module and charging system

Abstract

The utility model discloses a cooling device of an oil-immersed power module and a charging system, and belongs to the technical field of charging, the cooling device of the oil-immersed power module comprises a shell and a first guide plate, the shell is provided with a liquid inlet, the liquid inlet is located at the bottom end of the shell in the height direction, and the shell comprises a bottom plate; the first flow guide plate is arranged in the shell, the first flow guide plate and the bottom plate form a first space, the liquid inlet communicates with the first space, and a plurality of through first flow dividing openings are formed in the first flow guide plate. The oil-immersed power module cooling device can solve the problem that the cooling effect of the internal structure is poorer due to non-uniform flow of oil in the cooling device of the existing oil-immersed power module.

Description

Technical Field

[0001] This application relates to the field of charging technology, and in particular to a cooling device and charging system for an oil-immersed power module. Background Technology

[0002] Compared to air-cooled power modules, oil-immersed power modules use a cooling system that immerses the charging module in mineral oil for heat dissipation, reducing the overall failure rate of the power module by more than 50%. Furthermore, the oil-immersed power module cooling system solves the problem of low cooling efficiency in extreme environments such as dusty conditions, high altitudes, and extreme cold and humidity, greatly expanding the applicability of power module cooling systems.

[0003] However, existing oil-immersed power module cooling devices are structurally limited, resulting in uneven oil flow within the cooling device, which affects the heat dissipation effect of the power module. Utility Model Content

[0004] The main objective of this application is to provide a cooling device and charging system for an oil-immersed power module, which aims to solve the problem of uneven oil flow inside the cooling device of the existing oil-immersed power module, resulting in poor heat dissipation of its internal structure.

[0005] To achieve the above objectives, this application provides a cooling device for an oil-immersed power module, comprising: a housing and a first guide plate, wherein the housing is provided with a liquid inlet located at the bottom end in the height direction of the housing, and the housing includes a bottom plate; the first guide plate is disposed inside the housing and forms a first space with the bottom plate, the liquid inlet communicates with the first space, and the first guide plate is provided with a plurality of through first branch ports.

[0006] Optionally, the housing is further provided with a liquid outlet located at the top of the housing in the height direction. The housing also includes a top plate. The cooling device of the oil-immersed power module further includes a second guide plate, which is disposed inside the housing and forms a second space with the top plate. The liquid outlet communicates with the second space. The second guide plate is provided with a plurality of through second diversion ports.

[0007] Optionally, the first guide plate is detachably connected to the housing; and / or, the second guide plate is detachably connected to the housing.

[0008] Optionally, the housing further includes a left side plate and a right side plate disposed opposite to each other. The first guide plate has first mounting slots on both sides facing the left side plate and the right side plate. The left side plate and the right side plate are each provided with a first adapter plate, and each first adapter plate is embedded in the corresponding first mounting slot. And / or, the second guide plate has second mounting slots on both sides facing the left side plate and the right side plate. The left side plate and the right side plate are each provided with a second adapter plate, and each second adapter plate is embedded in the corresponding second mounting slot.

[0009] Optionally, the liquid inlet and the liquid outlet are both located at both ends of the left side plate or the right side plate.

[0010] Optionally, the first adapter plate near the liquid inlet includes a first horizontal plate, a first inclined plate, and a second horizontal plate connected in sequence, with the second horizontal plate embedded in a corresponding first mounting slot; the first adapter plate away from the liquid inlet is a flat plate structure, and the first adapter plate away from the liquid inlet and the second horizontal plate are on the same plane, with the first horizontal plate located on the side of the liquid inlet away from the base plate, and the distance between the end of the first inclined plate and the first horizontal plate that connects and the base plate is greater than the distance between the end of the first inclined plate and the second horizontal plate that connects and the base plate. And / or, the second adapter plate near the liquid outlet includes a third horizontal plate, a second inclined plate, and a fourth horizontal plate connected in sequence, the fourth horizontal plate being embedded in a corresponding second mounting slot; the second adapter plate away from the liquid outlet is a flat plate structure, the second adapter plate away from the liquid outlet and the fourth horizontal plate are on the same plane, the third horizontal plate is located on the side of the liquid outlet away from the top plate, and the distance between the end of the second inclined plate and the third horizontal plate that connects and the bottom plate is less than the distance between the end of the second inclined plate and the fourth horizontal plate that connects and the bottom plate.

[0011] Optionally, the distance from the first guide plate to the bottom plate is less than the distance from the liquid inlet to the bottom plate; and / or, the distance from the second guide plate to the top plate is less than the distance from the liquid outlet to the top plate.

[0012] Optionally, each of the first diversion ports is evenly distributed on the first guide plate; and / or, each of the second diversion ports is evenly distributed on the second guide plate.

[0013] Optionally, the width of the first guide plate is equal to the width of the bottom plate; the width of the second guide plate is equal to the width of the top plate; wherein the width of the bottom plate is equal to the width of the top plate.

[0014] Furthermore, to achieve the above objectives, this application also provides a charging system comprising at least two power modules, a controller, a power distribution device, and at least one charging interface, as described in any of the above possible implementations. The power distribution device is connected to the controller, each of the power modules, and each of the charging interfaces. The power modules convert AC power from the power grid into DC power and supply it to the charging interfaces. The controller acquires the power demand of each charging interface and generates a scheduling command based on the connection relationship of the controllable switches in the power distribution device and the power demand. The power distribution device controls the opening or closing of the controllable switches according to the scheduling command to distribute the output power of each power module to each charging interface.

[0015] Based on the cooling device for the oil-immersed power module provided in the embodiments of this application, when cooling the charging module inside the housing, the cooling oil first enters the first space inside the housing from the inlet, and then flows out through multiple first diversion ports on the first guide plate, so that the cooling oil can flow to the components inside the housing as evenly as possible, thereby improving the heat dissipation effect of the charging module. Attached Figure Description

[0016] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 This is a schematic diagram of the internal oil flow state of the cooling device for an existing oil-immersed power module.

[0019] Figure 2 A schematic diagram of the cooling device for an oil-immersed power module provided in this application;

[0020] Figure 3 for Figure 2 A schematic diagram of the internal structure of the cooling device for the oil-immersed power module is shown.

[0021] Figure 4 for Figure 3 Schematic diagram of the structure of the first and second guide vanes;

[0022] Figure 5 A schematic diagram of the internal structure of a cooling device for an oil-immersed power module provided in another embodiment of this application;

[0023] Figure 6 This is a block diagram of a charging system provided in an embodiment of this application.

[0024] In the diagram, 1 is the housing; 101 is the inlet; 102 is the outlet; 2 is the first guide plate; 201 is the first diversion port; 202 is the first mounting slot; 203 is the first adapter plate; 204 is the first horizontal plate; 205 is the first inclined plate; 206 is the second horizontal plate; 3 is the second guide plate; 301 is the second diversion port; 302 is the second mounting slot; 303 is the second adapter plate; 304 is the third horizontal plate; 305 is the second inclined plate; 306 is the fourth horizontal plate; 4 is the guide diversion structure; 401 is the diversion hole; 5 is the limiting plate; 6 is the connecting seat; 110 is the power module; 120 is the charging interface; 130 is the controller; and 140 is the power distribution device.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Figure 1 A schematic diagram of the internal oil flow state of an existing oil-immersed charging module. Figure 2 This application provides a schematic diagram of the structure of an oil-immersed power module; Figure 3 for Figure 2 The diagram shows the internal structure of an oil-immersed power module. Figure 4 for Figure 3 Schematic diagram of the structure of the first and second guide vanes;

[0032] Figure 5 This is a schematic diagram of the internal structure of an oil-immersed power module according to another embodiment of this application; Figure 6 This is a block diagram of a charging system provided in an embodiment of this application.

[0033] Reference Figure 1In existing oil-immersed power module cooling devices, the cooling oil flows rapidly in areas of low resistance and slowly or even skips areas of high resistance after entering the housing. This can cause overheating of the components inside the housing, affecting their operating efficiency. Therefore, this application proposes a cooling device for oil-immersed power modules that ensures uniform flow of the cooling oil within the housing, guaranteeing even cooling of the components.

[0034] Please see Figures 2 to 4 This application provides a cooling device for an oil-immersed power module. The cooling device for the oil-immersed power module may include: a housing 1 and a first guide plate 2. The housing 1 is provided with a liquid inlet 101, which is located at the bottom end in the height direction of the housing 1. The housing 1 includes a bottom plate. The first guide plate 2 is disposed inside the housing 1 and forms a first space with the bottom plate. The liquid inlet 101 communicates with the first space. The first guide plate 2 is provided with a plurality of through first diversion ports 201.

[0035] Based on the cooling device for the oil-immersed power module provided in the embodiments of this application, when cooling the charging module inside the housing 1, the cooling oil first enters the first space inside the housing 1 from the inlet 101, and then flows out through multiple first diversion ports 201 on the first guide plate 2, so that the cooling oil can flow to the components inside the housing 1 as evenly as possible, thereby improving the heat dissipation effect of the charging module.

[0036] It should be noted that in practical applications, the flow rate of the cooling oil can be adjusted by adjusting the spacing and size of the first branch port 201, thereby ensuring the uniform flow of the cooling oil in the housing 1.

[0037] Optionally, each of the first diversion ports 201 can be evenly distributed or unevenly distributed on the first guide plate 2; the size of each of the first diversion ports 201 can be the same or different, and this application does not limit this, as long as the uniform flow of the cooling oil can be guaranteed.

[0038] Please see Figure 3 The housing 1 is also provided with a liquid outlet 102, which is located at the top of the housing 1 in the height direction. The housing 1 also includes a top plate.

[0039] Furthermore, the cooling device for the oil-immersed power module may also include: a second guide plate 3, wherein the second guide plate 3 is disposed inside the housing 1 and forms a second space with the top plate, the liquid outlet 102 is connected to the second space, and a plurality of through second diversion ports 301 are provided on the second guide plate 3.

[0040] Based on the second guide plate 3, when the oil flows inside the housing 1 to the position of the second guide plate 3, the oil can enter the second space from the multiple second diversion ports 301 opened on the second guide plate 3, and then flow out from the outlet 102.

[0041] It should be noted that in practical applications, the filling height of the oil can be adjusted by adjusting the height of the second guide plate 3; and the flow rate of the oil can be adjusted by adjusting the spacing and size of the second diversion port 301.

[0042] Optionally, each of the second diversion ports 301 may be evenly distributed or unevenly distributed on the second guide plate 3; the size of each of the second diversion ports 301 may be the same or different, and this application does not limit this.

[0043] Optionally, the first guide plate 2 and the housing 1 can be fixedly connected or detachably connected.

[0044] As an example, please see Figure 3 The first guide plate 2 is detachably connected to the housing 1. This facilitates the maintenance of the oil-immersed power module; in addition, the first guide plate 2 and the housing 1 can be installed and removed without tools, greatly simplifying the assembly and disassembly process.

[0045] Optionally, the second guide plate 3 and the housing 1 can be fixedly connected or detachably connected.

[0046] As an example, please see Figure 3 The second guide plate 3 is detachably connected to the housing 1. This facilitates maintenance of the oil-immersed power module; furthermore, the second guide plate 3 and the housing 1 can be installed and removed without tools, greatly simplifying the assembly and disassembly process.

[0047] Please see Figure 3 , Figure 4 The housing 1 also includes a left side plate and a right side plate that are disposed opposite to each other.

[0048] Optionally, the first guide plate 2 may have first mounting slots 202 on both sides facing the left and right sides of the plate. The left and right sides may each have a first adapter plate 203. Each first adapter plate 203 can be connected to the first guide plate 2 by being embedded in the corresponding first mounting slot 202, thereby simplifying the disassembly and assembly steps of the first guide plate 2.

[0049] Optionally, the second guide plate 3 may have second mounting slots 302 on both sides facing the left and right sides of the plate. The left and right sides may each have a second adapter plate 303. Each second adapter plate 303 can be connected to the second guide plate 3 by being embedded in the corresponding second mounting slot 302, thereby simplifying the disassembly and assembly steps of the second guide plate 3.

[0050] Optionally, the liquid inlet 101 and the liquid outlet 102 can both be located at both ends of the left side plate or both at both ends of the right side plate, without limitation.

[0051] As an example, please see Figure 2 , Figure 3 The inlet 101 and outlet 102 are both located at both ends of the left side plate.

[0052] In this embodiment, the inlet 101 and outlet 102 are located on the same side of the housing 1, which facilitates operation by staff. Moreover, the structure is relatively simple, avoiding the problem of bending in the pipes of the inlet 101 and outlet 102 during layout, and also not affecting the normal flow of cooling oil in the pipes.

[0053] Optionally, please refer to Figure 3 The first adapter plate 203 near the liquid inlet 101 may include a first horizontal plate 204, a first inclined plate 205, and a second horizontal plate 206 connected in sequence. The second horizontal plate 206 is embedded in the corresponding first mounting slot 202. The first horizontal plate 204 is located on the side of the liquid inlet 101 away from the base plate, and the distance between the end of the first inclined plate 205 and the first horizontal plate 204 that is connected and the base plate is greater than the distance between the end of the first inclined plate 205 and the second horizontal plate 206 that is connected and the base plate.

[0054] This reduces the height of the first guide plate 2, preventing it from being too high and affecting the layout of the internal components of the housing 1; it also reduces the size of the first space, increasing the space for uniform oil flow, thereby effectively improving the heat dissipation of the charging module.

[0055] It should be understood that the first inclined plate 205 is inclined in the manner described above, which can play a guiding role in guiding the cooling oil from the inlet 101 to the first space.

[0056] Optionally, the first adapter plate 203 away from the liquid inlet 101 can be a flat plate structure. The first adapter plate 203 away from the liquid inlet 101 and the second horizontal plate 206 can be on the same plane, so that the first guide plate 2 can be kept horizontal.

[0057] Of course, in some other embodiments, the first adapter plate 203 can also be configured with other structures. For example, the first horizontal plate 204 and the first inclined plate 205 can also be replaced by an arc-shaped plate. This application does not limit this, as long as the relevant functions can be achieved.

[0058] Optionally, the distance between the first guide plate 2 and the bottom plate can be less than the distance between the inlet 101 and the bottom plate. This design reduces the size of the first space, increases the space for uniform oil flow, and thus effectively improves the heat dissipation of the charging module.

[0059] Optionally, please refer to Figure 3 The second adapter plate 303 near the liquid outlet 102 may include a third horizontal plate 304, a second inclined plate 305, and a fourth horizontal plate 306 connected in sequence. The fourth horizontal plate 306 is embedded in the corresponding second mounting slot 302. The third horizontal plate 304 is located on the side of the liquid outlet 102 away from the top plate. The distance between the end of the second inclined plate 305 and the third horizontal plate 304 that connects with the bottom plate is less than the distance between the end of the second inclined plate 305 and the fourth horizontal plate 306 that connects with the bottom plate.

[0060] This shortens the distance between the second guide plate 3 and the top plate, so as to avoid the second guide plate 3 affecting the layout of the internal components of the housing 1; and reduces the size of the second space, so that the cooling oil will fill the housing 1 as much as possible before flowing out from the outlet 102, ensuring that the upper components of the charging module are as completely immersed in the cooling oil as possible, so as to ensure the working efficiency of the module.

[0061] It should be understood that the second inclined plate 305 is inclined in the manner described above, which can serve as a guide to direct the cooling oil from the second space to the outlet 102.

[0062] Optionally, the second adapter plate 303, which is away from the liquid outlet 102, can be a flat plate structure. The second adapter plate 303, which is away from the liquid outlet 102, and the fourth horizontal plate 306 can be on the same plane, so that the second guide plate 3 can be kept horizontal.

[0063] Of course, in some other embodiments, the second adapter plate 303 can also be configured with other structures. For example, the third horizontal plate 304 and the second inclined plate 305 can also be replaced by an arc-shaped plate. This application does not limit this, as long as the relevant functions can be achieved.

[0064] Optionally, the distance from the second guide plate 3 to the top plate can be less than the distance from the outlet 102 to the top plate. This design reduces the size of the second space, allowing the cooling oil to fill the housing 1 as much as possible before flowing out from the outlet 102, ensuring that the upper components of the charging module are as completely immersed in the cooling oil as possible, thus ensuring the module's working efficiency.

[0065] Furthermore, the width of the first guide plate 2 can be equal to the width of the bottom plate; the width of the second guide plate 3 can be equal to the width of the top plate; wherein, the width of the bottom plate is equal to the width of the top plate.

[0066] This effectively prevents coolant from leaking out of the gap between the first guide plate 2 and the bottom plate, as well as from leaking out of the gap between the second guide plate 3 and the top plate. In other words, the coolant can flow out from multiple first branch ports 201 and multiple second branch ports 301 as much as possible, thus ensuring that the coolant flows evenly within the housing 1.

[0067] Furthermore, the number of first flow dividers 201 on the first guide plate 2 can be the same as the number of second flow dividers 301 on the second guide plate 3. In this way, while ensuring uniform flow of cooling oil within the housing 1, the first guide plate 2 and the second guide plate 3 have the same structure, which facilitates manufacturing.

[0068] Please see Figure 3 The first guide plate 2 and the second guide plate 3 can both be parallel to the top plate or the bottom plate, which is conducive to the uniform flow of cooling oil from the first guide plate 2 and the second guide plate 3, and to fully cool all parts of the charging module.

[0069] Optionally, the first adapter plate 203 and the shell 1 can be an integrally formed structure or an assembled structure, without limitation.

[0070] Optionally, the second adapter plate 303 and the housing 1 can be an integrally formed structure or an assembled structure, without limitation.

[0071] It should be understood that when the first adapter plate 203 and the housing 1 and the second adapter plate 303 and the housing 1 are integrally formed, it is beneficial to the processing and avoids the need to additionally connect the corresponding first adapter plate 203 and second adapter plate 303 after the housing 1 is processed.

[0072] As an optional implementation, please refer to Figure 6Another embodiment of this application provides a charging system, which includes at least two power modules 110, a controller 130, a power distribution device 140, and at least one charging interface 120, all implemented as described above. The power distribution device 140 is connected to the controller 130, each power module 110, and each charging interface 120. The power module 110 converts AC power from the power grid into DC power and supplies it to the charging interface 120. The controller 130 acquires the power demand of each charging interface 120 and generates a scheduling command based on the connection relationship of the controllable switches in the power distribution device 140 and the power demand. The power distribution device 140 controls the opening or closing of the controllable switches according to the scheduling command to distribute the output power of each power module 110 to each charging interface 120.

[0073] When the oil-immersed power module of this application is applied to a charging system, its main function is to ensure the uniform flow of cooling oil within the power module housing, thereby cooling all parts of the power module and extending its service life. This, in turn, extends the service life of the charging system.

[0074] In one optional implementation, the charging system provided in this application is an integrated DC charging pile, with the charging interface 120 used to connect the charging gun, and the charging gun being hung on the host of the charging system via the gun holder on the main body of the charging system.

[0075] In one optional implementation, the charging system provided in this application is a split-type DC charging pile. The charging system also includes multiple charging terminals. The charging interface 120 is used to connect the charging terminals. The charging terminals are set separately from the main body of the charging system. The charging terminals are equipped with a single charging gun or dual charging guns for outputting power to electric vehicles.

[0076] Please see Figure 5 In some other embodiments, a guide diversion structure 4 may be provided at the liquid inlet 101. The guide diversion structure 4 may extend toward the liquid outlet 102 and there is a gap between it and the liquid outlet 102. A plurality of diversion holes 401 may be evenly provided on the side of the guide diversion structure 4 away from the side wall of the housing 1. A limiting plate 5 may also be provided on the inner wall of the housing 1. The limiting plate 5 is close to the top plate and located on the side of the liquid outlet 102 facing the guide diversion structure 4. There is a gap between the end of the limiting plate 5 away from the liquid outlet 102 and the side wall of the housing 1.

[0077] In this embodiment, cooling oil enters the guide and diversion structure 4 through the inlet 101, and then flows into the housing 1 through multiple diversion holes 401 to cool and dissipate heat from the charging module. During this process, the cooling oil in the housing 1 can flow evenly from the bottom to the top of the housing 1. When the cooling oil reaches the height of the limiting plate 5, it can flow from the gap between the end of the limiting plate 5 away from the outlet 102 and the side wall of the housing 1 into the space between the limiting plate 5 and the top plate, and finally flow out of the housing 1 from the outlet 102. This process is repeated, so that all parts of the charging module located inside the housing 1 can be uniformly cooled.

[0078] It should be noted that you should refer to [link / reference]. Figure 5 The limiting plate 5 includes an inclined structure and a flat plate structure. The inclined structure is located at one end of the liquid outlet 102, and the distance from the flat plate structure to the top plate is less than the distance from the liquid outlet 102 to the top plate.

[0079] The above settings ensure that the cooling oil can fill the inner cavity of the housing 1 as much as possible, thus ensuring that the upper components of the charging module are fully immersed in the cooling oil to guarantee the module's working efficiency.

[0080] Please see Figure 5 The housing 1 also has a front side plate and a rear side plate arranged opposite to each other. A connecting seat 6 can be provided on the rear side plate. The connecting seat 6 is located at one end of the rear side plate near the liquid inlet 101. The guide diversion structure 4 can be detachably connected to the connecting seat 6.

[0081] The connecting seat 6 is provided on the rear side plate, and a guide diversion structure 4 is detachably installed on the connecting seat 6 (which can be connected by bolts) so that the guide diversion structure 4 will not shake significantly during the spraying of cooling oil, thus maintaining the stability of the entire structure.

[0082] In addition, the guide and diversion structure 4 is sealed to the inlet 101 to ensure that the cooling oil does not leak when entering the housing 1. The specific sealing structure is existing technology and will not be described in detail here.

[0083] Furthermore, the width of the limiting plate 5 is equal to the width of the top plate.

[0084] Specifically, the width of the limiting plate 5 is set to be equal to the width of the top plate. This design prevents coolant from flowing into the outlet 102 through the gaps on the front and rear sides of the limiting plate 5, thus avoiding uneven flow of coolant inside the housing 1. In other words, the coolant inside the housing 1 can only flow into the outlet 102 after passing through the limiting plate 5. This ensures a uniform flow of coolant inside the housing 1.

[0085] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A cooling device for an oil-immersed power module, characterized by comprising: The power module is fully immersed in oil, and the cooling device comprises: A shell (1) is provided with an inlet (101) at the bottom end in the height direction of the shell (1), and the shell (1) comprises a bottom plate; A first flow guide plate (2) is arranged inside the shell (1) and forms a first space with the bottom plate, the inlet (101) communicates with the first space, and a plurality of first shunt openings (201) are formed in the first flow guide plate (2).

2. The cooling arrangement for an oil-immersed power module according to claim 1, characterized in that, The shell (1) is also provided with an outlet (102) at the top end in the height direction of the shell (1), and the shell (1) further comprises a top plate, and the cooling device of the oil-immersed power module further comprises: A second flow guide plate (3) is arranged inside the shell (1) and forms a second space with the top plate, the outlet (102) communicates with the second space, and a plurality of second shunt openings (301) are formed in the second flow guide plate (3).

3. The cooling arrangement for an oil-immersed power module according to claim 2, characterized in that, The first flow guide plate (2) and the shell (1) are detachably connected; and / or, the second flow guide plate (3) and the shell (1) are detachably connected.

4. The cooling arrangement for an oil-immersed power module according to claim 3, characterized in that The shell (1) further comprises oppositely arranged left and right side plates, the first flow guide plate (2) is provided with a first mounting clamping groove (202) on the two sides facing the left and right side plates, and the left and right side plates are both provided with a first adapter plate (203), and each first adapter plate (203) is embedded in the corresponding first mounting clamping groove (202); And / or, the second flow guide plate (3) is provided with a second mounting clamping groove (302) on the two sides facing the left and right side plates, and the left and right side plates are both provided with a second adapter plate (303), and each second adapter plate (303) is embedded in the corresponding second mounting clamping groove (302).

5. The cooling arrangement for an oil-immersed power module according to claim 4, characterized in that The inlet (101) and the outlet (102) are both arranged at the two ends of the left or right side plate.

6. The cooling arrangement for an oil-immersed power module according to claim 5, characterized in that The first adapter plate (203) close to the inlet (101) comprises a first horizontal plate (204), a first inclined plate (205) and a second horizontal plate (206) connected in sequence, and the second horizontal plate (206) is embedded in the corresponding first mounting clamping groove (202); the first adapter plate (203) away from the inlet (101) is a flat plate structure, the first adapter plate (203) away from the inlet (101) is in the same plane as the second horizontal plate (206), the first horizontal plate (204) is located on the side of the inlet (101) away from the bottom plate, and the distance between the end of the first inclined plate (205) and the first horizontal plate (204) and the bottom plate is greater than the distance between the end of the first inclined plate (205) and the second horizontal plate (206) and the bottom plate. And / or, the second adaptive plate (303) close to the liquid outlet (102) comprises a third horizontal plate (304), a second inclined plate (305) and a fourth horizontal plate (306) connected in sequence, and the fourth horizontal plate (306) is embedded in the corresponding second mounting slot (302); the second adaptive plate (303) away from the liquid outlet (102) is a flat plate structure, the second adaptive plate (303) away from the liquid outlet (102) is in the same plane with the fourth horizontal plate (306), the third horizontal plate (304) is located on the side of the liquid outlet (102) away from the top plate, and the distance between the end of the second inclined plate (305) and the third horizontal plate (304) and the bottom plate is less than the distance between the end of the second inclined plate (305) and the fourth horizontal plate (306) and the bottom plate.

7. Cooling arrangement for oil-immersed power modules according to any of claims 2 to 6, characterized in that The distance from the first flow guide plate (2) to the bottom plate is less than the distance from the liquid inlet (101) to the bottom plate. And / or, the distance from the second flow guide plate (3) to the top plate is less than the distance from the liquid outlet (102) to the top plate.

8. Cooling arrangement for oil-immersed power modules according to any of claims 2 to 6, characterized in that Each first shunt port (201) is uniformly distributed on the first flow guide plate (2); and / or, each second shunt port (301) is uniformly distributed on the second flow guide plate (3).

9. Cooling arrangement for oil-immersed power modules according to any of claims 2 to 6, characterized in that The width of the first flow guide plate (2) is equal to the width of the bottom plate. The width of the second flow guide plate (3) is equal to the width of the top plate. The width of the bottom plate is equal to the width of the top plate.

10. A charging system characterized by, Comprise: At least two power modules (110) as claimed in any one of claims 1 to 9, a controller (130), a power distribution device (140) and at least one charging interface (120), wherein the power distribution device (140) is connected with the controller (130), each power module (110) and each charging interface (120) respectively; The power module (110) is used to convert alternating current of a power grid into direct current to provide to the charging interface (120); The controller (130) is used to acquire demand power of each charging interface (120), and generate a scheduling instruction according to a connection relationship of controllable switches in the power distribution device (140) and each demand power; The power distribution device (140) is used to control opening or closing of the controllable switches according to the scheduling instruction, so as to distribute output power of each power module (110) to each charging interface (120).

Images