CN103065805B

CN103065805B - A kind of rectangular block shape has the aluminium electrolutic capacitor module and structure of radiating surface

Info

Publication number: CN103065805B
Application number: CN201310009423.5A
Authority: CN
Inventors: 周旺龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-08
Filing date: 2013-01-08
Publication date: 2017-12-19
Anticipated expiration: 2033-01-08
Also published as: CN103065805A

Abstract

Using laminating bus bar as skeleton structure, aluminium electrolutic capacitor cylinder is axially parallel to the installation of laminating bus bar plane distribution, the air guide groove of closure designs can discharge aluminium electrolutic capacitor explosion-proof pressure in addition to capacitor module, laminating bus bar, electrolytic capacitor and air guide groove are encapsulated in shell with the casting glue of thermal conductivity, the planar design of shell casting glue is radiating surface, it is in close contact during installation with power inverter radiator, realizes a kind of rectangular block shape and have the aluminium electrolutic capacitor parallel connection modular structure product of radiating surface.

Description

A kind of rectangular block shape has the aluminium electrolutic capacitor module and structure of radiating surface

Technical field：

The present invention relates in electric vehicle driving power inverter, there is provided bus filters and reactive power compensating effect A kind of parallel combination modular structure of aluminium electrolutic capacitor.

Background technology：

Low pressure (below battery tension 100VDC) small power electric vehicle such as electri forklift, electric golf cart, electricity In the driving power inverter such as chopper, inverter of dynamic field vehicle etc., main circuit is generally all to have many discrete types MOSFET element or low pressure IGBT module and many small Al electrolytic capacitors are connected in parallel and formed.This scattered parallel-connection structure Complexity, packaging technology difficulty is high, and after particularly large number of component connection, pressing equal flow problem, capacitor dissipates than more prominent Heat problem is not easy to solve, and causes the problems such as reliability is not high, production efficiency is low.

Thus simple type of the people for assembling product；The requirement for solving product heat dissipation problem and raising reliability is very strong It is strong.

Low-voltage and high-current power MOSFET module product has emerged, such as Mitsubishi Electric Co.'s FM bank of power MOSFET module products, only P poles input 8A and N pole input 8B and U poles 8C, V pole 8D, W pole 8E lead-out terminals, greatly simplify work( The assembly working (such as Fig. 1) of rate switch element, but the company of power MOSFET module P poles input 8A and N poles input 8B and capacitor Connect installation and annoying Production Engineer always.Aluminium electrolutic capacitor generally cylindrical in shape, which improves power, to be realized by increasing cylinder , and electrolytic capacitor monomer is difficult the contour structures for changing cylinder；It is special that modularity in parallel is faced with aluminium electrolutic capacitor Explosion-proof Design problem, i.e. aluminium electrolutic capacitor must reserve enough pressure Free up Memories to ensure to produce at the explosion-proof valve of top The security of product in extreme circumstances.

To make capacitor turn into the rectangular block shape of convenient installation, there is engineer to attempt using the thin-film capacitor being easily achieved Device, for example, Toshiba Corp JP2008148530A patent gazettes announce with radiating rectangular block shape thin film capacitor knot Structure, but thin film capacitor compares the relatively low capacity density ratio of aluminium electrolutic capacitor and poor product hot properties so that electric power Conversion driving device volume is larger and reliability is not high.

The content of the invention：

The present invention solves the problems, such as it is to meet aluminium electrolutic capacitor explosion-proof pressure release request by design air guide groove, matches somebody with somebody The capacitor properly worked as puts arrangement architecture with laminated bus bars, realizes a kind of rectangular block shape and has the aluminium electroloysis electricity of radiating surface Container parallel connection modular structure product.

The technical solution adopted by the present invention is as follows：For ease of with power MOSFET module 8 or low pressure IGBT module and its He installs in the connection of type of switch pipe, is framework supporting structure (Fig. 3) with the bus bar 1 of suitable shape, aluminium electrolutic capacitor 2 is distributed In the both sides of laminating bus bar 1, to reduce structural volume, electrolytic capacitor 2 " lodging " is aluminium electroloysis in the plane of laminating bus bar 1 The cylinder of capacitor 2 is axially parallel to the plane of laminating bus bar 1 (Fig. 4, Fig. 5)；The air guide groove 4 of closure designs has bayonet socket 4A to make The top explosion-proof valve 2A clamping air guide groove 4 of aluminium electrolutic capacitor 2, air guide groove 4 has air outlet slit 4B, can be by inner air pressure Power is to release (Fig. 6) beyond capacitor module, and to reduce structural volume, air guide groove 4 has multiple bayonet socket 4A so that multiple electric capacity Device 2 can share an air guide groove 4 and meet explosion-proof pressure release request (Fig. 7)；Above laminating bus bar 1, electrolytic capacitor 2 It is encapsulated in air guide groove 4 with the preferable fixative of thermal conductivity such as casting glue 5 in shell 6, the open side of shell 6 is that fixative is exposed Embedding planar design is radiating surface 9, is bonded with power inverter radiator 7 or shell during installation, makes capacitor module internal Heat is transmitted in radiator and extraneous air via fixed casting glue radiating surface, improves device global reliability.

Brief description of the drawings：

Fig. 1：Power inverter main circuit structure figure

Fig. 2：Aluminium electrolutic capacitor power modules exploded view

Fig. 3：Laminating bus bar structure chart

Fig. 4：Laminating bus bar, the aluminium electrolutic capacitor location drawing

Fig. 5：Laminating bus bar and aluminium electrolutic capacitor installation diagram

Fig. 6：Air guide groove

Fig. 7：Air guide groove, aluminium electrolutic capacitor clamping installation diagram

Fig. 8：Laminating bus bar, air guide groove, aluminium electrolutic capacitor installation diagram

Fig. 9：Aluminium electrolutic capacitor power modules install sectional view in power inverter.

Digitized representation in figure：

1- laminating bus bars, wherein 1A- positive electrode bus are arranged, 1B- negative electrode bus row, 1C- insulating barriers, 1D- laminating bus bars Leading-out terminal, 1E- laminating bus bar binding posts.

Explosion-proof valve at the top of 2- aluminium electrolutic capacitors, wherein 2A- aluminium electrolutic capacitors, 2B- electrolytic capacitor positive wires, 2C- electrolytic capacitor negative wires.

3- aluminium electrolutic capacitor fixtures.

4- air guide grooves, wherein 4A- air guide groove capacitor bayonet socket, 4B- air guide groove air outlet slits.

5- fixes casting glue.

6- shells.

7- power inverter radiators.

8- power MOSFET modules, wherein 8A-P are extremely sub, and 8B-N is extremely sub, 8C- output U poles, 8D- output V poles, 8E- Export W poles.

9- aluminium electrolutic capacitor power modules radiating surfaces.

Embodiment：

The preferred embodiments of the present invention are described below with reference to accompanying drawing.

(such as Fig. 1) is connected for convenience of with power MOSFET module 8 and batteries installation, laminating bus bar is made suitable Shape, positive electrode bus row 1A and negative electrode bus row 1B with insulating barrier 1C ensure electric insulation, bus bar both ends have and stored respectively The nut fixed column 1E of battery pack connection and with the connection terminal 1D (such as Fig. 3) of power MOSFET module 8.

Aluminium electrolutic capacitor 2 is in the arranged distribution of laminating bus bar 1, to reduce structural volume and common air guide groove 4, electrolysis Capacitive cylinders body 2 " lodging " is on the fixture 3 of the plane of laminating bus bar 1, i.e., aluminium electrolutic capacitor cylinder 2 is with being laminated bus It is axially in parallel (Fig. 4, Fig. 8) to arrange 1 plane.The positive wire 2B of electrolytic capacitor 2 is connected with positive electrode bus row 1A, electrolytic capacitor 2 Negative wire 2C arranges circular hole on 1A by positive electrode bus and is connected (Fig. 5) with negative electrode bus row 1B.

Air guide groove 4 can set multiple bayonet socket 4A of electrolytic capacitor 2, and have and sky outside electrolytic capacitor module shell The air outlet slit 4B (Fig. 6) of gas phase connection.The more top explosion-proof valve 2A of electrolytic capacitor 2 load the capacitor card of air guide groove 4 Mouth 4A essentially becomes square body (Fig. 7).

Laminating bus bar 1, electrolytic capacitor 2 and air guide groove 4 are assembled into the square body of robust structure, as shown in Figure 8.

The square body structure that laminating bus bar 1, electrolytic capacitor 2 and air guide groove 4 are assembled loads shell 6, in shell 6 Embedding has the fixation casting glue 5 of heat conductivility between each structure in side, makes laminating bus bar 1, electrolytic capacitor 2, electrochemical capacitor Device fixture 3, air guide groove 4, fixed casting glue 5, shell 6 turn into strong entirety (Fig. 1).

When aluminium electrolutic capacitor power modules are installed, the embedding face of the fixed casting glue 5 in the inner side of shell 6 and radiator 7 are close Contact, forms radiating surface 9, and capacitor module internal heat conducts heat (Fig. 9) by radiating surface 9 to radiator 7.

Claims

1. a kind of electric vehicle driver rectangular block shape has the aluminium electrolutic capacitor module of radiating surface, it is characterised in that bag Include the laminating bus bar of connection terminal；The cylinder aluminium electrolutic capacitor axially in parallel with laminating bus bar plane and be aluminium electricity Electrolysis condenser provides the air guide groove of safe pressure release；The air guide groove is provided with multiple electrolytic capacitor bayonet sockets, institute Air guide groove is stated with the air outlet slit with aluminium electrolutic capacitor power modules housing exterior contact air, the electrochemical capacitor Explosion-proof valve is fitted into the capacitor bayonet socket of the air guide groove at the top of device, is respectively tied in the shell and shell of outer rectangular square There is the casting glue of heat conductivility between structure；The casting glue plane of shell contacts with radiator during installation makes aluminium electrolutic capacitor power Module internal heat is distributed as the radiating surface of aluminium electrolutic capacitor power modules.

2. it is used for the aluminium electrolutic capacitor module of electric vehicle according to claim 1, it is characterised in that the stacking bus Row's connection terminal is the two groups of terminals either one group of common terminal for connecting batteries and power switch pipe respectively.

3. it is used for the aluminium electrolutic capacitor module of electric vehicle according to claim 1, it is characterised in that the stacking bus Row's connection terminal is two independent anode and cathode terminals, or the laminating bus bar is provided with both positive and negative polarity mounting hole.

4. it is used for the aluminium electrolutic capacitor module of electric vehicle according to claim 1, it is characterised in that the aluminium electroloysis electricity Container is distributed in laminating bus bar plane both sides, or is only distributed in laminating bus bar plane side.

5. it is used for the aluminium electrolutic capacitor module of electric vehicle according to claim 1, it is characterised in that the air guide groove It is " air duct " that is connected with aluminium electrolutic capacitor power modules extraneous air of any shape.

6. it is used for the aluminium electrolutic capacitor module of electric vehicle according to claim 1, it is characterised in that the radiating surface can To be that the bottom surface of aluminium electrolutic capacitor power modules contacts the contact surface to be formed or aluminium electrolutic capacitor work(with radiator The side of rate module contacts the contact surface to be formed with power inverter shell.