CN206341539U - A kind of IGBT casings - Google Patents

Abstract

The utility model discloses a kind of IGBT casings, wherein, the IGBT casings include：The base plate upper surface is connected with several connecting poles, and the connecting pole is connected with a liquid cooling plate away from described base plate one end, and the liquid cooling plate upper surface is provided with IGBT module.IGBT casings provided by the utility model so that liquid cooling plate, IGBT module and its related device and base plate, which are spaced, to be come, and not only increases the radiating effect and adjustment space of IGBT module and its related device；And when carrying out IGBT device test, whole IGBT need not be dismantled, and directly dismantled only for problematic device；And due to the raising of its radiating effect and adjustment space so that there is no concern that causing infringement apart from excessive can not radiate between multiple devices, reduce its arrangement space and overall dimensions.

Description

A kind of IGBT casings

Technical field

The utility model is related to a kind of IGBT casings, more particularly to a kind of split-type structural IGBT casings.

Background technology

As one of important high-power main flow device of power electronics, IGBT has been widely used for household electrical appliance, traffic fortune The fields such as defeated, power engineering, regenerative resource and intelligent grid；In industrial aspect, it is applied to such as traffic control, power and become Change, industrial motor, uninterrupted power source, wind-powered electricity generation and solar facilities, and the frequency converter for automatically controlling.

In various fields, because being related to protection of using effect and the life-span of IGBT and other heater members, it is necessary to it Radiated, air-cooled tradition is difficult to play its effect on middle high-power IGBT so that IGBT can not be in stable work shape State, so as to influence service life and performance.

Existing combination box is taken the direct casting of water channel in casting bottom mostly, then installed above in water channel The heater members such as IGBT, finally install a cover plate additional in its open at one end and are sealed.

The drawbacks of existing IGBT casings have many：1st, huge structure, internal components are because generate heat of different sizes and casting The limitation of heat conductivility, so it is difficult to be arranged in small space, it is therefore desirable to which water channel scope is done greatly, so that can Accommodate more heater members；2nd, install and test extremely inconvenient, usual IGBT and its related device, which can be installed together, to be placed on The bottom nearest from water channel, installs other specification devices additional, is then tested again above；But the device detection related to IGBT has Must all be dismantled again when problem could repair the device for changing these bottoms, and workload is quite big to imitate so as to reduce assembling Rate；3rd, the limited function of causing important device such as IGBT of capacity of heat transmission is from being able to comprehensively play so that inefficiency.

Therefore, prior art has yet to be improved and developed.

Utility model content

In view of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of IGBT casings, it is intended to solve IGBT body structures are huge in the prior art, install the problem of testing low inconvenient, heat dissipation and high cost.

The technical solution of the utility model is as follows：

A kind of IGBT casings, including base plate, at least one encloses the side located at the base plate surrounding and formed accommodating chamber Plate, and the cover plate of the accommodating chamber is covered in, wherein, the base plate upper surface is connected with several connecting poles, the connection Post is connected with a liquid cooling plate away from base plate one end, and the liquid cooling plate upper surface is used to fix IGBT module.

In preferred scheme, described IGBT casings, wherein, the liquid cooling plate side is outward extended with inlet channel and water outlet Pipeline.

In preferred scheme, described IGBT casings, wherein, the inlet channel and outlet conduit, which are connected to one, to be used for Connect the connecting pipe at water source.

In preferred scheme, described IGBT casings, wherein, it is connected to one between two connecting pipes and water source Fixed -piping, the fixed -piping is fixed on side plate.

In preferred scheme, described IGBT casings, wherein, the side plate correspondence fixed -piping is provided with two and allows that it is worn The fixing hole crossed.

In preferred scheme, described IGBT casings, wherein, connecting pipe includes：It is connected with inlet channel or outlet conduit Flexible pipe, and the pipe joint being connected with fixed -piping；

The connecting pole is the adjustable connecting stud of height opposed bottom；

The liquid cooling plate adjusts height by connecting stud, and prevents from by flexible pipe being limited to side plate fixing hole.

In preferred scheme, described IGBT casings, wherein, the pipe joint is slotting check joint soon.

In preferred scheme, described IGBT casings, wherein, it is provided with sealing ring between the cover plate and side plate.

In preferred scheme, described IGBT casings, wherein, the base plate is integrally formed with side plate.

The assembly method of IGBT casings, is installed on base plate upper surface by connecting pole first described in a kind of as above any one, Then liquid cooling plate is fixedly connected on connecting pole, placed after IGBT module, cover plate is covered in accommodating chamber.

Compared with prior art, IGBT casings provided by the utility model, are connected as a result of in base plate upper surface Several connecting poles, connect a liquid cooling plate, and liquid cooling plate upper surface is provided with IGBT in connecting pole away from described base plate one end Module；Come so that liquid cooling plate, IGBT module and its related device and base plate are spaced, not only increase IGBT module and its correlation The radiating effect and adjustment space of device；And when carrying out IGBT device test, whole IGBT need not be dismantled, and only Directly dismantled for problematic device；And due to the raising of its radiating effect and adjustment space so that between multiple devices There is no concern that causing infringement apart from excessive can not radiate, its arrangement space and overall dimensions are reduced.

Brief description of the drawings

Fig. 1 is the structural representation of IGBT casing preferred embodiments in the utility model.

Fig. 2 is the connecting pipeline structure schematic diagram of IGBT casing preferred embodiments in the utility model.

Fig. 3 is the board structure schematic diagram of IGBT module liquid cooling plate preferred embodiment in the utility model.

Fig. 4 is the substrate inner flow passage structural representation of IGBT module liquid cooling plate preferred embodiment in the utility model.

Fig. 5 is the structural representation of the straight fins structure cover plate of IGBT module liquid cooling plate preferred embodiment in the utility model Figure.

Fig. 6 is the structural representation of the cylinder needle-like structural cover plate of IGBT module liquid cooling plate preferred embodiment in the utility model Figure.

Fig. 7 is the structural representation of the corrugated fin structure cover plate of IGBT module liquid cooling plate preferred embodiment in the utility model Figure.

Fig. 8 is that the liquid cooling plate of IGBT module liquid cooling plate preferred embodiment in the utility model shows with IGBT module cooperation position It is intended to.

Embodiment

The utility model provides a kind of IGBT casings, to make the purpose of this utility model, technical scheme and effect more clear Chu, clearly, referring to the drawings and give an actual example to the utility model be further described.It should be appreciated that described herein Specific embodiment only to explain the utility model, is not used to limit the utility model.

As shown in figure 1, the utility model provides a kind of IGBT casings, including base plate 100, with the one of base plate 100 Shaping or the side plate 200 of connection, the two, which surrounds, an accommodating chamber（Because mark is easily obscured with the mark of base plate 100, and explanatory note is Its structure is reacted enough, therefore is not indicated）, the accommodating chamber top is provided with cover plate 300, the cover plate 300 and side plate 200 End face is connected；Several connecting poles 400, the upper surface of connecting pole 400 connection are provided with the upper surface of base plate 100, accommodating chamber There is a liquid cooling plate 500, the main components A10 of IGBT module is fixedly connected on the upper surface of liquid cooling plate 500 and detachable, and other Component A20 is arranged at its lower surface, during specific implementation, and which component is fixed thereon end face, which component and is fixed on Its lower surface can be adjusted as needed, and the utility model is not specifically limited herein.But, preferably IGBT main heating Element is arranged on end face.

In the utility model preferred embodiment, base plate 100 is integrally formed with side plate 200, naturally it is also possible to distinguish the two It is fixed and can not be split by modes such as welding after machine-shaping；Similarly, the two can also be connected by clamping, screw thread The mode being detachably connected such as connect to be fixed.Wherein, preferred scheme is integrally molded so as, because base plate 100 and side plate 200 can be with The techniques such as polishing grinding, and uncomplicated and technology maturation low cost are carried out after disposal molding by way of mold；And it is logical Cross the housing of this processing mode shaping（The plus side plate 200 of base plate 100）Overall performance is good, including IP grades, service life and event Barrier rate is low.

Sealing ring 800 is provided between the cover plate 300 and side plate 200, to improve its IP grade.

IP is Ingress Protection abbreviation in IP grades, and IP grades are that foreign matter is invaded for electrical appliance enclosure The degree of protection entered.

IGBT (Insulated Gate Bipolar Transistor), insulated gate bipolar transistor is by BJT The compound full-control type voltage driven type power semiconductor device of (double pole triode) and MOS (insulating gate type field effect tube) composition Part, has advantage of both MOSFET high input impedance and GTR low conduction voltage drop concurrently.

The connection of liquid cooling plate 500 and side plate 200 is preferably by being detachably connected, because maintenance maintenance is convenient.

It can be seen from said structure compared with prior art, IGBT casings provided by the utility model, due to using Several connecting poles 400 are connected in the upper surface of base plate 100, it is cold away from described one end of base plate 100 to connect a liquid in connecting pole 400 Plate 500, and the upper surface of liquid cooling plate 500 is provided with IGBT module；So that liquid cooling plate 500, IGBT module and its related device with Base plate 100, which is spaced, to be come, and not only increases the radiating effect and adjustment space of IGBT module and its related device；And carrying out When IGBT device is tested, whole IGBT need not be dismantled, and directly be dismantled only for problematic device；And due to it The raising of radiating effect and adjustment space so that there is no concern that causing to damage apart from excessive can not radiate between multiple devices Evil, reduces its arrangement space and overall dimensions.

The utility model is further in preferred embodiment, and the side of liquid cooling plate 500 is outwards（To the direction of side plate 200）It is extended with Inlet channel 510 and outlet conduit 520, the inlet channel 510 and outlet conduit 520 are connected to a connecting pipe 600, Two connecting pipes 600 are connected to a fixed -piping 700, and the fixed -piping 700 is detachably secured to side plate 200, It is used to connect water source, specifically, the fixed -piping 700 being connected with inlet channel 510（Alternatively referred to as the first fixed -piping 700） For the water in water source to be guided into liquid cooling plate 500, and the fixed -piping 700 being connected with outlet conduit 520（Alternatively referred to as second Fixed -piping 700）For the water in liquid cooling plate 500 to be guided into water source, the two synergy makes liquid cooling plate 500 be formed completely Circulation.

Certainly, it is not provided with connecting pipe 600 and/or fixed -piping 700 is also possible, directly enters liquid cooling plate 500 Waterpipe 510 and outlet conduit 520 are connected after running through side plate 200 with water source, or with connecting pipe 600, fixed -piping 700 Any one connection after be connected again with water source；If the two all without using the handling of liquid cooling plate 500 will be caused complex, it is necessary to Accommodating chamber reserves enough spaces；And the sealing being connected if without using connecting pipe 600 for liquid cooling plate 500 with water source It is a larger test；It is unfavorable for the fixation reliability of ventilating water pipe if without using fixed -piping 700, in variation in water pressure When, the change in location of pipeline can be caused so that water-carrying capacity is unstable in liquid cooling plate 500, heat exchange bad stability.

Fixed -piping 700 is using the connector slotting soon of standard, and its middle part lock onto IGBT casings, the other end and cooling system It is connected；It installs a sealing ring additional between casing, improves its IP grade.

In the further preferred embodiment of the utility model, the position of the correspondence fixed -piping 700 of side plate 200 is provided with two appearances Perhaps its fixing hole 210 passed through.

It has to be noted that liquid cooling plate 500 is wanted to complete the circulation with external source, complete water circulation is formed, is needed It is connected, and can now selects in base plate 100, side plate 200 or cover plate with external water source after ventilating water pipe is passed through into side plate 200 300 set fixing holes, or say and respectively set half of fixing hole on side plate 200 and cover plate 300, make fixed -piping 700 from the two Between pass through.It will be apparent that from the point of view of structure described previously, the utility model is eliminated sets solid on base plate 100 or cover plate 300 The scheme in hole is determined, because it is unfavorable for the space utilization of whole IGBT casings.And fixed -piping 700 is allowed from the side passed through therebetween Case, because its stability maintenance difference is also denied.Therefore, fixing hole 210 is set on side plate 200, makes fixed -piping 700 therefrom Through being preferred plan, not only stability preferably, be effectively utilized the space-consuming of IGBT casings, and the pipeline kept flat for The fluency of current is undoubtedly best.

In the further preferred embodiment of the utility model, as shown in Fig. 2 the connecting pipe 600 includes：With inlet channel 510 or the flexible pipe 610 that connects of outlet conduit 520, and the pipe joint 620 being connected with fixed -piping 700；The connecting pole 400 be the adjustable connecting stud of height opposed bottom 100；The liquid cooling plate 500 adjusts height by connecting stud, and by soft Pipe 610 prevents from being limited to the fixing hole 210 of side plate 200.

Connecting stud lower end is external thread column, and the position of base plate 100 being adapted to therewith offers internal thread hole, passes through the company of turning Connect stud and can adjust its relative altitude with base plate 100, so as to adjust the relative altitude of liquid cooling plate 500 and base plate 100, set soft Pipe 610 can ensure liquid cooling plate 500 when being raised and lowered, pipe joint 620 and fixed -piping 700 need not adjustment position so that Improve its versatility.The upper end of connecting stud is preferably internal thread hole, and cover plate 300 is set in the position corresponding with internal thread hole Connection through hole is equipped with, using bolt or screw etc. through connection through hole securing cover plate 300 with above connecting stud, improving its dress With with convenient disassembly.

Square or circle will be set on the outside of the middle and upper part of connecting stud, it is preferably square, it is convenient that it is entered using spanner Row regulation.

Flexible pipe 610 is preferably glue-type flexible pipe 610, and connection is inserted using fast between flexible pipe 610 and pipe joint 620, will Pipe joint 620 is set to insert check joint soon, and one is to facilitate the quick connection of the two, but liquid leakage can be prevented to casing It is interior, device is damaged, IGBT casing service lifes are reduced.

Liquid cooling plate 500 is specifically included：Substrate 1, as shown in figure 3, the upper end of the substrate 1 has been arranged in parallel multiple spouts 13, the two ends of spout 13 are provided with and respectively communicated with a feed liquor runner 4 and go out liquid runner 5, as shown in Figure 4；The substrate 1 exists A cold drawing cover plate 8 is provided with each spout 13, as shown in Figures 5 to 7.

In the utility model preferred embodiment, IGBT module is by Electronic Packaging, its structure as shown in figure 8, being provided with 3 IGBT submodules 12, as shown in figure 8, the one cold drawing cover plate 8 of correspondence of each IGBT submodules 12, i.e., described spout 13 and cold drawing lid The quantity of plate 8 is corresponding with the quantity of IGBT submodules 12, and its position is preferably the underface of IGBT submodules 12.

During specific implementation, the feed liquor runner 4 and to go out liquid runner 5 be all one end open, one end closing, as shown in figure 3, i.e. The substrate 1 is provided with an inlet 2 being connected with feed liquor runner 4, and one with going out the liquid outlet 3 that liquid runner 5 is connected, The inlet 2 and liquid outlet 3 are preferably provided at same one end of cold drawing cover plate 8, to carry out the recycling of coolant, simplify The structure of liquid cooling plate 500.

As shown in figure 4, inner flow passage in substrate 1 include being sequentially communicated the feed liquor runner 4 of setting, the runner of spout 13 and Go out liquid runner 5, wherein feed liquor runner 4 and go out liquid runner 5 and be preferred to use circular configuration, on the one hand ensure stream of the coolant in it Dynamic fluency, is on the other hand easy to the connection of inlet 2 and joint（Joint refers to the joint between coolant liquid source and substrate 1）, Another further aspect can make uniform flow distribution at multiple imports of spout 13.And spout 13 is preferably then hexagonal structure, it makes The width of flow path of spout 13 is gradually increased by import to intermediate region, so that coolant fully contacts the part of intermediate region Meanwhile, prevent that coolant is excessively disperseed at import, cause flowing uneven.Spout 13 and inlet channel 4, outlet flow 5 it Between use the connected mode of transition, can so make the import very little of spout 13,3 inlet parts in inlet channel 4 The surface area very little of the relatively whole inlet channel 4 of surface area, can so make the coolant in inlet channel 4 fully contact 3 The inlet part of spout 13, can largely improve the uniformity of flow distribution between each spout in parallel 13.

Compared with prior art, IGBT module liquid cooling plate 500 provided by the utility model, as a result of in substrate 1 Upper end has been arranged in parallel multiple spouts 13, and is provided with and respectively communicated with a feed liquor runner 4 at the two ends of spout 13 and goes out liquid stream Road 5；And substrate 1 is provided with a cold drawing cover plate 8 in each spout 13.So that the IGBT module liquid cooling plate 500 is each Channel capacity below cold drawing cover plate 8 is evenly distributed, and has good uniform temperature between cold drawing surface and coolant import and export, and Import and export pressure drop controllable in the reasonable scope, heat radiation power is high；Solve the import of IGBT module liquid cooling plate 500 in the prior art Pressure drop is excessive between outlet, requires too high to liquid cooling system circulation pump power, and excessive temperature differentials between import and outlet, easily The problem of causing cold drawing structure thermal stress skewness.

Meanwhile, the utility model uses the structure of liquid cooling plate 500 actually modular construction, and its market prospects is good, assembles and tears open Unload conveniently, the good airproof performance of liquid cooling plate 500.And because the substrate 1 of whole liquid cooling plate 500 uses symmetrical structure, import and go out The position of mouth can be exchanged, it is only necessary to change the direction of the installation of cold drawing cover plate 8.

The liquid cooling plate 500 of the structure had both overcome that single channel flow resistance is excessive and multichannel flow distributes uneven problem, made Obtaining whole liquid cooling plate 500 has uniform temperature good, and import and export pressure drop is relatively low, and the fin structure of regulation cold drawing cover plate 8 can effectively change The heat-sinking capability of whole cold drawing, substrate 1 and the structure fabrication process of cold drawing cover plate 8 are ripe, simply.

In the further preferred embodiment of the utility model, as shown in figure 3, the spout 13 includes：It is arranged at the liquid The bottom of chute 13 and with the feed liquor runner 4 and going out the first groove portion 6 that liquid runner 5 is connected；And it is arranged at first groove The top of portion 6 and communicate therewith, the second groove portion 14 for cold drawing cover plate 8 described in clamping；And it is arranged at second groove portion 14 Top and communicate therewith, the 3rd groove portion 15 for accommodating the cold drawing cover plate 8.

Second groove portion 14 is provided with the middle part of four snap openings for being used to engage the cold drawing cover plate 8, the snap openings Curved type, one end is in semi-circular, and one end is in plane so that cold drawing cover plate 8 it is easy for installation and can precise positioning, make it It can only be vertically moved in the range of the second groove portion 14.The form construction design of cold drawing cover plate 8 be and the groove portion of spout 13 second 14 and the 3rd groove portion 15 connect after identical structure, not only facilitate the cooperation of cold drawing cover plate 8 and substrate 1, also improve simultaneously The sealing of whole liquid cooling plate 500.

In further preferred embodiment, as shown in figure 5, the lower surface of cold drawing cover plate 8 is provided with several interval settings Runner plate, the spout 13 is divided into multiple first runners in parallel by several described runner plates.

During specific implementation, runner plate can be set to linear pattern or ripple type, i.e. straight fins structure 9 or ripple type structure 11, when it is set to straight fins structure 9, its straight fins carries out spread configuration using solid matter mode, and the design feature is close The straight fins of row can cooperatively form multichannel flow passage structure with spout 13, so as to largely reduce runner edge Journey resistance, the design of traditional multi-channel structure can just be solved by so only striving the design to the fin structure of cold drawing cover plate 8.Ripple type The design of structure 11 with straight fins structure 9 similarly, herein without excessively repeating.

The straight fins of solid matter could alternatively be several cylinders, be flowed with increasing by 8 pairs of cold drawing cover plate in spout 13 The flow-disturbing performance of fluid, the cylinder can include：Ranks set the first cylinder 16, and ranks set and with institute State the second cylinder 17 that the first cylinder 16 is staggered.

In the further preferred embodiment of the utility model, the cold drawing cover plate 8 is at one end end close to the feed liquor runner 4 At least one splitter 7 is provided with mouthful, as shown in figure 5, the splitter 7 is uniform by the coolant for coming from feed liquor runner 4 Branch to the both sides of spout 13.

It is preferred that the splitter 7 is provided with two, two splitters be arranged in parallel, itself and the arrival end end face of cold drawing cover plate 8 Between angle be 45 °.

The setting of splitter 7 can solve the flow channel entry point part coolant of spout 13 be only partial to cavity side flowing ask Topic, can make the flow distribution of whole cavity runner evenly.And straight fins preferred on cold drawing cover plate 8 on this basis Structure 9, can form intermediate region multi-channel structure when cold drawing cover plate 8 and spout 13 coordinate, be effectively increased cooling Liquid effective contact area of cold drawing, so as to improve the exchange capability of heat of whole cold drawing；Cylinder acicular texture 10 and ripple type knot Structure 11 and straight fins structure 9 are similarly.

Unlike the prior art, it is parallel-connection structure that the utility model, which designs 3 IGBT modules, and feed liquor runner 4 is with going out liquid Runner 5 uses circular flow channel, and it uses transition connected mode, the inlet area of each cavity of substrate 1 between hexagon cavity It is smaller with respect to feed liquor runner 4 and the surface area for going out liquid runner 5, so as to allow coolant sufficiently to contact the import department of each cavity Point, after cavity enters coolant, the sectional area of each cavity of substrate 1 gradually increases, and can largely reduce U-shaped many The problem of passage parallel connection every bypass flow skewness of runner.

Moreover, the utility model is good fit between cold drawing cover plate 8 and liquid cold trap to ensure, in the middle of cold drawing cover plate 8 Part is designed as ladder platform, and depressed regions can design the fin structure of increase arbitrary shape, and the density for changing fin can Multichannel flow passage structure is formed to change the comprehensive heat-sinking capability of cold drawing, and during cavity assembling.It is corresponding in each cold drawing cover plate 8 Water inlet passage part increases a pair of parallel oblique splitter 7, can effectively solve only to be partial to when fluid flows toward cavity One direction.

In the further preferred embodiment of the utility model, liquid cooling plate 500 uses the aluminum alloy materials of high thermal conductivity coefficient（Aluminium sheet Or Al squeezing material）The cold drawing cover plate 8 of the aluminium sheet of substrate 1 and high thermal conductivity coefficient, copper-aluminum composite board or aluminium alloy extrusions passes through stirring Friction welding technological is welded to form；The plane that cold drawing cover plate 8 is contacted with IGBT is the copper material face of copper aluminum composite material, if using aluminium Material then requires that it is intensive fine and closely woven that the plane that cold drawing cover plate 8 is contacted with tank uses teeth technique to be processed into whole face without direction The ratio of water channel, water channel and wall thickness is 2:1.

A kind of assembly method of the IGBT casings as described in any one in above-mentioned embodiment, it first pacifies connecting pole 400 Loaded on the upper surface of base plate 100, then liquid cooling plate 500 is fixedly connected on connecting pole 400, placed after IGBT module, will covered Plate 300 is covered in accommodating chamber.

It should be appreciated that application of the present utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come Say, can according to the above description be improved or converted, all these modifications and variations should all belong to the appended power of the utility model The protection domain that profit is required.

Claims (9)

1. a kind of IGBT casings, including base plate, at least one encloses the side plate located at the base plate surrounding and formed accommodating chamber, And it is covered in the cover plate of the accommodating chamber, it is characterised in that the base plate upper surface is connected with several connecting poles, the company Connect post and be connected with a liquid cooling plate away from base plate one end, the liquid cooling plate upper surface is used to fix IGBT module.

2. IGBT casings according to claim 1, it is characterised in that the liquid cooling plate side is outward extended with inlet channel And outlet conduit.

3. IGBT casings according to claim 2, it is characterised in that the inlet channel and outlet conduit are connected to One connecting pipe for connecting water source.

4. IGBT casings according to claim 3, it is characterised in that connect respectively between two connecting pipes and water source A fixed -piping is connected to, the fixed -piping is fixed on side plate.

5. IGBT casings according to claim 4, it is characterised in that the side plate correspondence fixed -piping is provided with two appearances Perhaps its fixing hole passed through.

6. IGBT casings according to claim 5, it is characterised in that connecting pipe includes：With inlet channel or outlet pipe The flexible pipe of road connection, and the pipe joint being connected with fixed -piping；

The connecting pole is the adjustable connecting stud of height opposed bottom；

The liquid cooling plate adjusts height by connecting stud, and prevents from by flexible pipe being limited to side plate fixing hole.

7. IGBT casings according to claim 6, it is characterised in that the pipe joint is slotting check joint soon.

8. IGBT casings according to claim 1, it is characterised in that be provided with sealing ring between the cover plate and side plate.

9. IGBT casings according to claim 1, it is characterised in that the base plate is integrally formed with side plate.