CN205319035U - Low light -duty no shell of inductance power electronic capacitor for vehicle - Google Patents

Abstract

The utility model provides a low light -duty no shell of inductance power electronic capacitor for vehicle, includes: the 1st multiple ends electrode subassembly (1), the 2nd multiple ends electrode subassembly (4), the flexible polyester material is sealed (2) and is fixed the electric capacity book core (3) in (2) are sealed to the flexible polyester material, its characterized in that: the 1st multiple ends electrode subassembly (1) and the 2nd multiple ends electrode subassembly (4) have filler circulation hole (17) respectively, include still that the 1st connects metal spraying layer portion (8) and the 2nd connection metal spraying layer portion (11), end (6) are drawn forth to the 1st electrode and end (9), the 1st middle conductive strips (7) and the 2nd middle conductive strips (10) are drawn forth to the 2nd electrode, conductive strips (10) are arranged electric capacity in and are rolled up core (3) outside in the middle of the 2nd, and electric capacity roll up and be equipped with insulating layer (5) between core (3). This design reduces the condenser self -induction, and is favorable to the heat dissipation of condenser, improves the reliability and the reduce cost of condenser.

Description

A kind of light-duty power electronic capacitor of vehicle without shell of low inductance

Technical field

The present invention relates to a kind of vehicle power electronic capacitor, particularly relate to the structure of the light-duty vehicle power electronic capacitor without shell of low inductance, in International Patent Classification (IPC), classification can belong to H01G4/224 and H01G4/228.

Background technology

Electric automobile in the market commonly uses according to GB/T25121-2010 " the vehicle power electronic capacitor of " rail transit rolling stock electric power of equipment electronic capacitor ". Its electric capacity core adopts noninductive winding, and the self-inductance of each core is minimum, and therefore the self-inductance of capacitor depends primarily on the self-induction of electrode. The conventionally used copper braid over braid of electrode of this capacitor or copper strips are drawn, and owing to capacitor only has two poles, therefore only two copper strips (or copper establishment band) are drawn as electrode. When the electric current that ripple component is bigger passes through this two electrode, this two electrode can produce bigger stray inductance pressure drop, cause that capacitor self induction reactance is relatively large, survey this inductance L and be typically larger than 30nH, now capacitor runs under high frequency operating mode, temperature rise can be made too fast, too high, directly result in its life-span too short.

Meanwhile, the vehicle power electronic capacitor that market commonly uses, it is generally adopted cabinet and adds the mode of rigid resin-encapsulate to encapsulate electric capacity core. Using such packaged type, owing to the density of hard resin is relatively big and has plastic shell, the volume and weight of capacitor self can become big, and the electric automobile whole for the purpose of manned loading is disadvantageous by this. And, when high temperature, high vibration, easily there is cabinet and hard resin material encapsulated layer in this capacitor, cracking situation about separating between hard resin material encapsulated layer and capacitor body. It addition, the heat conductivity of cabinet is also poor, this shell can make capacitor self-radiating slow, thus causing that capacitor internal temperature rise is too fast, too high, affects capacitor service life further.

The typical structure of this capacitor is such as shown in Fig. 3 A, Fig. 3 B:

In plug 18 periphery winding capacitance core 3;

Pad 16 in capacitor core 3 top, bottom gilding layer is respectively welded the 1st single-ended electrode assembly the 12 and the 2nd single-ended electrode assembly 13,1st single-ended electrode assembly 12 stretches out directly up, 2nd multiterminal electrode assembly 13 is walked around electric capacity core 3 outer circumference surface and is protruded upward, and is provided with therebetween insulating barrier 5;

Said modules waters hard resin 15 after loading cabinet 14.

Summary of the invention

The technical problem to be solved is, it is proposed to the light-duty power electronic capacitor of vehicle without shell of a kind of low inductance, can improve problem described in background technology.

This invention address that the technical scheme of described technical problem is: the light-duty power electronic capacitor of vehicle without shell of a kind of low inductance, including: the 1st multiterminal electrode assembly (1), 2nd multiterminal electrode assembly (4), soft quality polyester material encapsulating (2) and the electric capacity core (3) being fixed in soft quality polyester material encapsulating (2); It is characterized in that:

1st multiterminal electrode assembly (1) and the 2nd multiterminal electrode assembly (4) are respectively provided with implant circulation hole (17);

Also include the 1st connection gilding layer portion (8) and the 2nd and connect gilding layer portion (11), 1st electrode leads to client (6) and the 2nd electrode leads to client (9), the 1st middle conductive strips (7) and the 2nd middle conductive strips (10);

2nd middle conductive strips (10) are placed in electric capacity core (3) outside, and and are provided with insulating barrier (5) between electric capacity core (3).

It further designs: the 1st electrode leads to client (6) and the 2nd electrode leads to client (9) are many exits. These many exits are preferably more than 4 exits.

This is designed with multiterminal electrode assembly and replaces single-ended electrode assembly, compared with single-ended electrode assembly, considerably increases ripple current and flows through the cross-sectional area of electrode, and parallel branch decreases the self-induction drawn by electrode and introduce, thus decreasing capacitor self-induction. Test shows, employs the capacitor capacitor than single-ended extraction electrode of 4 end extraction electrodes, and self-inductance effectively reduces about 50%. Additionally, the parallel branch structure of multiterminal electrode assembly makes the position that the electric current of capacitor flows through electrode more scatter with distribution, make the electrode area of dissipation bigger (comparing with Fig. 3 A, Fig. 3 B structure) of capacitor, be more beneficial for the heat radiation of capacitor, thus avoid the situation of local pyrexia.

In addition, this soft quality polyester material encapsulating mode being designed with apheredermes good toughness replaces being encapsulated mode by the combination of cabinet and hard resin, fundamentally solve the situation as Fig. 3 hard resin (15) separates with cabinet (14), and soft quality polyester material itself has better anti-vibrating and impact ability, also reduce the probability separated between encapsulated layer with capacitor body. Simultaneously, have employed apheredermes soft quality polyester material encapsulating (2) mode, owing to soft quality polyester material envelope density is less than hard resin (15), and eliminate cabinet (14), this just alleviates the weight of electric capacity own and decreases capacitor volume, effectively reduces production cost. Remove the cabinet that heat conductivity is poor, be also beneficial to the heat radiation of capacitor itself, improve the reliability of capacitor.

Technical scheme and effect will be further described in conjunction with accompanying drawing in a specific embodiment.

Accompanying drawing explanation

Figure 1A, Figure 1B are positive section view and the plan structure schematic diagrams of embodiment of the present invention capacitor;

Fig. 2 A, Fig. 2 B are positive section view and the plan structure schematic diagrams of embodiment of the present invention electrode for capacitors exit correspondence position;

Fig. 3 A, Fig. 3 B are positive section view and the plan structure schematic diagrams that tradition has shell vehicle power electronic capacitor;

Fig. 4 A, Fig. 4 B are positive section view and the plan structure schematic diagrams of embodiment of the present invention capacitor the 1st multiterminal electrode assembly;

Fig. 5 is the perspective view of embodiment of the present invention capacitor the 2nd multiterminal electrode assembly;

Fig. 6 A, Fig. 6 B are positive section view and the plan structure schematic diagrams of embodiment of the present invention capacitor the 2nd multiterminal electrode assembly.

Icon illustrates:

1. the 1st multiterminal electrode assembly; 2. soft quality polyester material encapsulating; 3. electric capacity core; 4. the 2nd multiterminal electrode assembly; 5. insulating barrier; 6. the 1st electrode leads to client; 7. the 1st middle conductive strips; 8. the 1st connects gilding layer portion; 9. the 2nd electrode leads to client; 10. the 2nd middle conductive strips; 11. the 2nd connects gilding layer portion; 12. the 1st single-ended electrode assembly; 13. the 2nd single-ended electrode assembly; 14. cabinet; 15. hard resin; 16. pad; 17. implant circulation hole.

Detailed description of the invention

The light-duty vehicle without shell of the low inductance of the embodiment of the present invention with power electronic capacitor as shown in Figure 1, Figure 2 shown in A, Fig. 2 B, including:

The 1st multiterminal electrode assembly 1 as shown in Fig. 4 A, Fig. 4 B, the 2nd multiterminal electrode assembly 4 as shown in Fig. 5 and Fig. 6 A, Fig. 6 B, soft quality polyester material encapsulating 2 and the electric capacity core 3 being fixed in soft quality polyester material encapsulating 2; 1st multiterminal electrode assembly the 1 and the 2nd multiterminal electrode assembly 4 is respectively provided with implant circulation hole 17;

1st multiterminal electrode assembly the 1 and the 2nd multiterminal electrode assembly 4 includes the 1st connection gilding layer portion the 8 and the 2nd respectively and connects gilding layer portion the 11, the 1st electrode leads to client the 6 and the 2nd electrode leads to client the 9, the 1st middle conductive strips 10 of middle conductive strips the 7 and the 2nd;

2nd middle conductive strips 10 are placed in outside electric capacity core 3, and and are provided with insulating barrier 5 between electric capacity core 3.

During manufacture, 1st multiterminal electrode assembly the 1 and the 2nd multiterminal electrode assembly 4 is pressed Figure 1A respectively, symmetrical 4 orientation described in Figure 1B connect connection gilding layer portion 11 of gilding layer portion the 8 and the 2nd the 1st and are welded to electric capacity core 3 two transverse plane, insulating barrier 5 is put between the 2nd multiterminal electrode assembly 4 and electric capacity core 3, welding and the above stated assembly structure that assembles are positioned among stainless steel mould (mold cavity surfaces has releasing agent) and fix, the filling of soft quality polyester is injected in the last logical hole 17 of logistics that is filled through under vacuum conditions, until soft quality curable polyester and become soft quality polyester material encapsulating 2 after take out be the product capacitor made.

Embodiment of the present invention capacitor is to improve to form on the basis of vehicle power electronic capacitor traditional structure, the content that dependency structure is not stated, and all inherits described in background technology vehicle power electronic capacitor traditional structure as shown in Fig. 3 A, Fig. 3 B.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention. All any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, are all contained within protection scope of the present invention.

Claims (3)

1. the light-duty power electronic capacitor of vehicle without shell of low inductance, including: the 1st multiterminal electrode assembly (1), 2nd multiterminal electrode assembly (4), soft quality polyester material encapsulating (2) and the electric capacity core (3) being fixed in soft quality polyester material encapsulating (2); It is characterized in that:

1st multiterminal electrode assembly (1) and the 2nd multiterminal electrode assembly (4) are respectively provided with implant circulation hole (17);

Also include the 1st connection gilding layer portion (8) and the 2nd and connect gilding layer portion (11), 1st electrode leads to client (6) and the 2nd electrode leads to client (9), the 1st middle conductive strips (7) and the 2nd middle conductive strips (10);

2nd middle conductive strips (10) are placed in electric capacity core (3) outside, and and are provided with insulating barrier (5) between electric capacity core (3).

2. capacitor according to claim 1, it is characterised in that: described 1st electrode leads to client (6) and the 2nd electrode leads to client (9) they are many exits.

3. capacitor according to claim 2, it is characterised in that: described many exits are more than 4 exits.