CN103219870A

CN103219870A - Radiating method of aluminum electrolytic capacitor bunch of power unit of controller for electric vehicle

Info

Publication number: CN103219870A
Application number: CN 201310059092
Authority: CN
Inventors: 周旺龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-02-25
Filing date: 2013-02-25
Publication date: 2013-07-24

Abstract

The invention discloses a radiating method of an aluminum electrolytic capacitor bunch of a power unit of a controller for an electric vehicle. The radiating method relates to aluminum electrolytic capacitor modules, a busbar terminal, a binding terminal pillar, a power switch device and a radiator of the power switch device, wherein the aluminum electrolytic capacitor modules are packed in an integrated outer shell in a bunching mode, the busbar terminal and the modules are integrally used for being connected with the power switch device, the binding terminal pillar, the power switch device and the radiator are used for being connected with a storage battery together with the modules in an integral mode, the integrated and square bunch aluminum electrolytic capacitor modules are provided with radiating surfaces which are installed with the radiator and a shell body of a controller in an attached mode, and heat produced by a capacitor is led out of the controller.

Description

A kind of aluminium electrolytic capacitor boundling radiating mode of controller for electric vehicle power cell

Technical field:

The present invention relates to small-sized electric vehicle mesolow low-power machine driving governor, specifically is that the aluminium electrolytic capacitor layout of electric machine controller is installed and radiator structure.

Background technology:

Being used for the programmable driving governor of motor vehicle controls the rotating speed and the torque of automobile drive electric motor, it is one of key components and parts of electric automobile, different with the common electric machine driving governor is that the motor in electric automobile driving governor requires to have small size, high power, has both had the high power density characteristics.

Driving governor is broadly divided into power section, drive part and control section three big systems, and power cell described in this explanation is the power section of first charge system device.Power cell is meant motor drive controller loop of power circuit and cooling system, specifically comprises device for power switching; Radiator for the device for power switching heat radiation; With the capacitor that smooth voltage is provided for switching device; And connection bus, binding post or binding post or the like.

Because MOS EFT has switching frequency height, small size, big electric current, the low characteristics of cost, generally be adopted as device for power switching by the low voltage motor driving governor, same small-sized lead wire type aluminum electrolytic capacitor has that high frequency characteristics is good, small size, big capacity, low-cost advantage are widely adopted, for MOS EFT provides voltage regulation filtering and absorbing high-frequency noise purposes.

Usually the electric machine controller structure as shown in Figure 1, MOS EFT pipe 1A Surface Mount on aluminium base 1, the installations of fitting of aluminium base 1 back side and radiator 4.Input binding post 1B, 1C are connected with middle layer circuit board 2 on the aluminium base, many aluminium electrolytic capacitor 2A are installed in parallel on middle layer circuit board 2, draw controller housing outer positive terminal 2B, negative terminal 2C by middle layer circuit board 2, be connected with storage battery again; Aluminium base 1 output end binding post U1D, V1E, W1F, directly draw that controller housing 5 is outer to be connected with drive motors.Layer circuit board 3 is that drive motor controller drives and control section on the controller, has lead to be connected (referring to Fig. 3, Fig. 4) with external control interface 5A with lower floor aluminium base 1, middle layer circuit board 2 respectively.

The electric machine controller circuit structure as shown in Figure 2.Because loop of power circuit is to be made of the parallel connection of numerous discrete type components and parts, all presses equal flow problem more outstanding; Because complex structure, the existence of pulse current or ripple current in the main circuit makes stronger electric field and the magnetic field radiation of existence in the entire circuit structure space, and the driving and the control system of electric machine controller are brought very big interference, has reduced the operational reliability of controller; Again owing to aluminium electrolytic capacitor (2A) ESR value in the major loop is bigger, a large amount of heat that produce during loaded work piece, and aluminium electrolytic capacitor 2A does not have the heat dissipation channel design, can only heat be conducted by the conductor of circuit own, or heat is dispersed in the air of driving governor enclosure interior, cause the interior temperature rise of controller housing very high, the own reliability of components and parts or controller is reduced; Motor drive controller also exists the packaging technology difficulty big at present in addition, is difficult for realizing miniaturization or the like problem (referring to Fig. 3, Fig. 4).

Summary of the invention:

The present invention discloses a kind of capacitor boundling radiating mode of controller for electric vehicle power cell, comprises that boundling is encapsulated in the aluminium electrolytic capacitor module 6 in the integrated housing; Be used for the busbar terminal 6D, the 6E that are connected with device for power switching with the module one; Be used for the binding post post 6B, the 6C that are connected with storage battery with the module one; With device for power switching 1 and radiator 4 thereof, the boundling aluminium electrolytic capacitor module 6 of wherein integrated square shape has radiating surface 6A and radiator 4 or controller housing to fit to install, and capacitor is produced heat derive (referring to Fig. 5) beyond the controller.

After the present invention program installed aluminium electrolytic capacitor 2A boundling, electric machine controller can reduce the loop of power circuit structure space, thereby electromagnetic interference intensity is reduced, and improves the electric machine controller operational reliability; Integrated encapsulation electrolytic capacitor module 6 can be dispersed into heat beyond the controller by radiating surface 6A, thereby reduce temperature rise in the controller seal casinghousing, improve the reliability of components and parts and electric machine controller, the enforcement of this external capacitive body boundling radiating mode, also help the electric machine controller miniaturization and promptly improve the controller power density ratio, simplify controller product packaging technology and product structure or the like (referring to Fig. 4, Fig. 6).

The technical scheme that adopts is as follows: utilize the busbar structure that aluminium electrolytic capacitor 2A parallel connection is the capacitor module, in the inclosure rectangular housing, become boundling aluminium electrolytic capacitor module packet 6, its split shed one side plane of packet shell is radiating surface 6A, install with bottom heat spreader 4 applyings, make boundling aluminium electrolytic capacitor module 6 internal heat be dispersed into the electric machine controller housing with in the outer air, thereby reach the purpose (referring to Fig. 6) that reduces electromagnetic radiation, reduction internal temperature rise, raising power density, simplifies process structure via radiator 4.

Description of drawings:

Fig. 1: the inner mounting structure figure of common low voltage motor controller;

Fig. 2: low voltage motor controller circuitry sketch;

Fig. 3: the aluminium base and the capacitor parallel line board mounting structure figure that mount power MOSFET;

Fig. 4: the aluminium base and the capacitor parallel line board mounting structure end view that mount power MOSFET;

Fig. 5: the aluminium base and the boundling aluminium electrolytic capacitor module mounting structure figure that mount power MOSFET;

Fig. 6: the inner mounting structure end view of low voltage motor controller that adopts aluminium electrolytic capacitor boundling module;

Fig. 7: the inner mounting structure figure of low voltage motor controller that adopts aluminium electrolytic capacitor boundling module.

Digitized representation among the figure:

1, mount the aluminium base of power MOSFET,

Wherein 1A, discrete power MOSFET manage;

1B, mount the electrode input end of power MOSFET aluminium base;

1C, mount the negative input of power MOSFET aluminium base;

1D, mount the U utmost point output of power MOSFET aluminium base;

1E, mount the V utmost point output of power MOSFET aluminium base;

1F, mount the W utmost point output of power MOSFET aluminium base;

Electric capacity parallel line plate fixed interval pillar on 1G, the aluminium base;

1H, power MOSFET tube drive controlling Interface Terminal.

2, aluminium electrolytic capacitor parallel line plate

Wherein 2A, aluminium electrolytic capacitor;

2B, the anodal input wires fixed leg of electric machine controller;

2C, electric machine controller negative pole input wires fixed leg;

2D, aluminium electrolytic capacitor parallel line plate cathode output end;

2E, aluminium electrolytic capacitor parallel line plate cathode output end;

Driving control unit wiring board fixed interval pillar on 2F, the capacitor parallel line plate.

3, electric machine controller driving control unit wiring board;

4, electric machine controller base radiator;

5, electric machine controller upper case;

Wherein 5A is a motor controller controls unit external interface wire casing.

6, boundling square shape aluminium electrolytic capacitor module;

Wherein 6A, boundling square shape aluminium electrolytic capacitor module radiating surface;

6B, the anodal input wires fixed leg of electric machine controller are equal to 2B;

6C, electric machine controller negative pole input wires fixed leg are equal to 2C;

6D, boundling square shape aluminium electrolytic capacitor module cathode output end are equal to 2D;

6E, boundling square shape aluminium electrolytic capacitor module cathode output end are equal to 2E;

6F, boundling square shape aluminium electrolytic capacitor module are installed screw.

Specific embodiment:

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

Utilize the busbar structure that aluminium electrolytic capacitor 2A parallel connection is the capacitor module, enclose in the rectangular block shape housing, become boundling aluminium electrolytic capacitor module packet 6.Cylindrical binding

post

6B, 6C are arranged at boundling square shape aluminium electrolytic capacitor module 6 tops, are used for being connected lead with battery; Boundling square shape aluminium electrolytic capacitor module 6 has three groups of anodal leading-out terminal 6D and negative pole leading-out terminal 6E in power switch component one side, respectively with 1 three groups of sub-1B of electrode input end of the power MOSFET module that mounts power MOSFET (1A) aluminium base and the sub-1C connection of negative input, packet 6 shells wherein lower openings one side plane are radiating surface 6A, fit with bottom heat spreader 4, by rectangular enclosure screw 6F is installed (referring to Fig. 5) is installed.

The aluminium base 1 that mounts power MOSFET (1A) and the shared bottom heat spreader 4 of radiating surface 6A of square shape boundling aluminium electrolytic capacitor module 6 dispel the heat (referring to Fig. 5, Fig. 6).

Adopt boundling square shape aluminium electrolytic capacitor module 6, electric machine controller inside is become mount the two-ply structure of the aluminium base 1 and the controller drives control unit wiring board 3 of power MOSFET (1A), reduced the whole height of electric machine controller; After the aluminium electrolytic capacitor bundle structure module 6, reduced controller power major loop distance greatly, the electromagnetic radiation degree is reduced; The shell of integrated encapsulation boundling aluminium electrolytic capacitor module, aluminium electrolytic capacitor 2A generation heat outwards is dispersed in the controller air in addition through radiator 4 by the radiating surface 6A of the boundling aluminium electrolytic capacitor module 6 of shell aperture side, greatly reduce the temperature rise in the controller housing, reached the purpose (referring to Fig. 6, Fig. 7) that reduces electromagnetic radiation, reduction internal temperature rise, raising power density, simplifies process structure.

Claims

1. the aluminium electrolytic capacitor boundling radiating mode of a controller for electric vehicle power cell comprises that boundling is encapsulated in the aluminium electrolytic capacitor module in the integrated casing; Arrange with the bus that the module one is used for being connected with device for power switching; Be used for the binding post post and device for power switching and the radiator thereof that are connected with storage battery with the module one, wherein a side of the boundling aluminium electrolytic capacitor module shell of rectangular block shape is a radiating surface, contacting with radiator or controller housing fits installs, and capacitor is produced heat conduct beyond the controller.

2. according to the described capacitor boundling radiating mode that is used for the controller for electric vehicle power cell of claim 1, wherein said bus row's feature: be two groups of terminals of branch both positive and negative polarity or the laminating bus bar that the both positive and negative polarity mounting hole site is arranged.

3. according to the described capacitor boundling radiating mode that is used for the controller for electric vehicle power cell of claim 1, wherein said bus row's feature: can be the splicing ear of symmetric shape, also can be asymmetric, erose splicing ear.

4. according to the described capacitor boundling radiating mode that is used for the controller for electric vehicle power cell of claim 1, the feature of wherein said device for power switching is: device for power switching can be that the aluminium base that mounts power MOSFET is formed the power MOSFET module, also can be power MOSFET module or low pressure IGBT module constant power switching component.

5. according to the described capacitor boundling radiating mode that is used for the controller for electric vehicle power cell of claim 1, the feature of wherein said installation contact radiator is: radiator can be and the shared one radiator of device for power switching, also can be that other boundling aluminium electrolytic capacitor module is heat radiator dedicated.

6. according to the described capacitor boundling radiating mode that is used for the controller for electric vehicle power cell of claim 1, the feature that the radiating surface contact applying of wherein said rectangular block body boundling aluminium electrolytic capacitor module is installed is: contacting with metal heat sink fits installs, can be that electric machine controller metal shell contact is fitted and installed, also can be contact the installation of fitting with any heat-conducting medium that electric machine controller housing outer air is connected.

7. according to the described capacitor boundling radiating mode that is used for the controller for electric vehicle power cell of claim 1, the feature that wherein said and module one are used for being connected with storage battery the binding post post is: can be cylinder, also can be the metallic conductor of arbitrary shape.