CN210865931U - Combined capacitor - Google Patents

Abstract

The utility model provides a combined capacitor relates to the electrical components field, has solved the parallelly connected access circuit of the capacitor that adopts many independent finished products among the high-power lift circuit that exists among the prior art, the great technical problem of volume. The combined capacitor comprises at least two capacitor bodies, wherein the positive leading-out end of each capacitor body is connected with one busbar, and the negative leading-out ends of all the capacitor bodies are connected with the same busbar. The utility model discloses can combine the electric capacity body of different voltages together organically, can be so that compact structure reduces the volume of electric capacity product.

Description

Combined capacitor

Technical Field

The utility model belongs to the technical field of electrical components technique and specifically relates to a combined capacitor is related to.

Background

The capacitor, generally referred to as capacitor, is a device for holding charges, is one of a large number of electronic components used in electronic equipment, and is widely applied to the fields of blocking direct current and alternating current, coupling, bypassing, filtering, tuning loops, energy conversion, control and the like in circuits.

In the aspect of new energy, film capacitors (which are divided into 2 parts, namely a front-end low-voltage DC filter capacitor and a tail-end high-voltage DC filter capacitor) used by the DC-DC booster are mainly used for filtering and absorbing peaks, and the film capacitors are characterized by large capacity, and small equivalent series resistance and equivalent inductance. The front-end low-voltage DC filter capacitor and the tail-end high-voltage DC filter capacitor are two independent capacitor finished products, the two capacitors are connected in parallel to form a combined capacitor with large capacity, and the combined capacitor is connected into a circuit in a busbar connection mode.

The applicant has found that the prior art has at least the following technical problems:

(1) the high-power buck-boost circuit generally needs a plurality of capacitors in parallel connection, and then is connected into a circuit, the existing capacitors adopt independent capacitor finished products, a copper plate is adopted as a connecting wire outside to be connected with the circuit, and a combined capacitor formed by the plurality of capacitors in parallel connection has larger volume, so that the whole volume of the circuit design is larger;

(2) a plurality of independent capacitors are connected into the circuit in a busbar connection mode, the connecting busbars can generate large stray inductance, and the inductance can damage circuit elements;

(3) the external parallel connection of a plurality of independent capacitors results in a large production cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a combined capacitor to adopt the parallelly connected access circuit of the independent off-the-shelf condenser of a plurality of among the high-power lift circuit that exists among the solution prior art, the great technical problem of volume. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a combined capacitor, including female the arranging and the electric capacity body of constituteing by the electric capacity core, wherein, electric capacity body is two at least, every electric capacity body's positive pole is drawn forth the end and is connected with one respectively female arranging, all electric capacity body's negative pole is drawn forth the end and is connected same female arranging.

Preferably, the distance between two adjacent capacitor bodies is 5 mm.

Preferably, the number of the capacitor bodies is two, the busbar comprises two positive connecting busbars and a negative connecting busbar, the positive electrode of the capacitor core in each capacitor body is connected with one positive connecting busbar, and the negative electrodes of the capacitor cores in the two capacitor bodies are connected with the negative connecting busbar.

Preferably, the positive electrode connecting busbar and the negative electrode connecting busbar respectively comprise a busbar main body and a connecting plate provided with a binding post, the connecting plate is connected with the busbar main body, the binding post on the positive electrode connecting busbar and the binding post on the negative electrode connecting busbar are arranged on the same side of the capacitor core.

Preferably, the capacitor core is a cylinder or a flat body, the capacitor core comprises two planes parallel to each other and a curved surface located between the two planes, and the two planes of the capacitor core are respectively connected with the positive connecting busbar and the negative connecting busbar.

Preferably, the capacitor cores in each capacitor body are multiple and arranged in multiple rows and multiple columns, wherein curved surfaces of two adjacent capacitor cores in each row are abutted; and/or the planes of two adjacent capacitor cores in each row are abutted.

Preferably, the combined capacitor further comprises a housing, and the capacitor body and the busbar are both arranged in the housing.

Preferably, the combined capacitor further comprises a filler filled between the case, the capacitor body and the busbar.

Preferably, the busbar main body is of a rectangular structure, and the capacitor cores are fixedly connected with the corresponding busbar main body in a welding mode.

Preferably, the shell is of an injection molding structure, and the busbar is made of red copper material.

The utility model provides a combined capacitor, including female the arranging and the electric capacity body of constituteing by the electric capacity core, wherein, the electric capacity body is two at least, and every electric capacity body's positive pole is drawn forth the end and is connected with a female arranging respectively, and the negative pole of all electric capacity bodies is drawn forth the end and is connected same female arranging. That is to say, the negative pole of the electric capacity core in different electric capacity bodies shares a female row and draws forth, and the positive pole of the electric capacity core in different electric capacity bodies respectively draws forth with a female row, combines the electric capacity body of different voltage together organically, can make compact structure, and integrative integrated design concentrates the encapsulation to avoid monomer encapsulation, adopted the parallelly connected access circuit of the many independent finished product capacitors in the high-power lift voltage circuit that has solved among the prior art, made the great technical problem of electric capacity product whole volume in the circuit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a combined capacitor provided in an embodiment of the present invention;

fig. 2 is a top view of a combined capacitor provided by an embodiment of the present invention;

fig. 3 is a front view of a combined capacitor provided by an embodiment of the present invention.

Reference numerals: 1. a busbar; 11. the positive electrode is connected with the busbar; 12. the negative electrode is connected with the busbar; 2. a capacitor body; 21. a capacitor core; 3. a busbar body; 4. a connecting plate; 5. and (4) binding posts.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the utility model provides a combined capacitor, including female arranging 1 and the electric capacity body 2 of constituteing by electric capacity core 21, wherein, electric capacity body 2 is two at least, and every electric capacity body 2's positive pole is drawn forth the end and is connected with female arranging 1 respectively, and the negative pole of all electric capacity bodies 2 is drawn forth the end and is connected same female arranging 1. It should be noted that each capacitor body 2 includes a plurality of capacitor cores 21, and two ends of each capacitor core 21 have electrodes, wherein one end is used as a positive electrode, and the other end is used as a negative electrode, where the positive terminal of the capacitor body 2 refers to the positive terminal of the capacitor core 21 in each capacitor body 2, and the negative terminal of the capacitor body 2 refers to the negative terminal of the capacitor core 21 in each capacitor body 2.

That is to say, the negative poles of the capacitor cores in different capacitor bodies 2 share one bus bar 1 to be led out, the positive poles of the capacitor cores of different capacitor bodies 2 are respectively led out by one bus bar 1 to organically combine the capacitor bodies 2 with different voltages together, so that the structure is compact, the integrated combined design is concentrated in packaging, the monomer packaging is avoided, and the size of the product is reduced. Secondly, the capacitor core 21 itself is non-inductive, and the intrinsic inductance of the capacitor product depends on the capacitance lead-out mode and the length of the connecting wire, which can be understood as the shorter the connecting wire, the smaller the inductance. Independent single condenser itself just has inherent inductance among the prior art, in addition adopt copper (outside overlap joint circuit) as connecting wire and circuit connection between the independent condenser finished product, its outside overlap joint circuit increases to be connected and walks line length and walk the line and standardize and all can increase the inductance, and outside copper is built and can be restricted other component interference, factors such as electromagnetic interference detour, also can increase manufacturing cost still can produce harmful inductance, and the utility model discloses a electric capacity core 21 and female 1 body structure of arranging, the mode is offset in the positive and negative magnetic field, can reduce the inductance of combined capacitor by the at utmost, electric capacity direct overlap joint carries out circuit connection to IGBT and filter inductance, female 1 lapped stray inductance of arranging in having reduced the outside circuit, promote voltage quality, reduce the loss to the circuit IGBT that gathers. In addition, the utility model discloses integrated configuration can reduce product ESR value, reduces the product from the source and generates heat, and the higher the ESR value is the product calorific capacity is lower more, wherein, ESR value divides into two parts, and partly for electric capacity core 21 medium is inherent, partly for welding, connecting material produced in the assembly joining process; and the utility model provides a combined capacitor's electric capacity core 21 adopts integration composite design with female arranging 1, has reduced the connecting material in the equipment process, has reduced manufacturing cost simultaneously.

In this embodiment, as shown in fig. 1, two capacitor bodies 2 are provided (one capacitor body 2 refers to a group of capacitor cores 21 in fig. 1), which are respectively a first capacitor body and a second capacitor body with different voltages, the busbar 1 includes two positive connecting busbars 11 and one negative connecting busbar 12, the positive electrode of the capacitor core 21 in the first capacitor body is commonly connected with one positive connecting busbar 11, the positive electrode of the capacitor core 21 in the second capacitor body is commonly connected with the other positive connecting busbar 11, and the negative electrodes of the capacitor cores 21 in the first capacitor body and the second capacitor body are both connected with the same negative connecting busbar 12.

Wherein, female arranging 11 is connected to the positive pole and female 12 arranging is connected to the negative pole all includes female main part 3 of arranging and is equipped with connecting plate 4 of terminal 5, and connecting plate 4 is connected with female main part 3 of arranging, through setting up terminal 5, is convenient for be connected of combined capacitor and other parts. The wiring terminal 5 on the positive connecting busbar 11 and the wiring terminal 5 on the negative connecting busbar 12 are both arranged on the same side of the capacitor core 21, so that wiring is facilitated. In order to improve the conductive capability of the busbar 1, the busbar 1 in this embodiment is made of red copper or other metal materials with good conductive performance, and is subjected to tin plating treatment, so that the busbar 1 is ensured to have good corrosion resistance.

Specifically, the capacitor core 21 is a cylinder or a flat body, the capacitor core 21 includes two planes parallel to each other and a curved surface located between the two planes, and the two planes of the capacitor core 21 are respectively connected with the positive connection busbar 11 and the negative connection busbar 12. In this embodiment, the distance between two adjacent capacitor bodies 2 is 5 mm. The plurality of capacitor cores 21 in each capacitor body 2 are arranged in multiple rows and multiple columns, and the curved surfaces of two adjacent capacitor cores 21 can be abutted in each row; it is also possible to abut the planes of two adjacent capacitor cores 21 in each column. This can improve the compactness of the capacitor. In addition, as shown in fig. 2, the busbar body 3 is rectangular, and the capacitor core 21 and the corresponding busbar body 3 are fixedly connected by welding. Compared with a cylindrical capacitor, the capacitor has the advantage that the capacity of the capacitor can be improved in the same space. And in this way, the whole combined capacitor can be set into a cuboid structure, so that the combined capacitor can be conveniently installed in a limited space.

In order to improve the reliability of the capacitor, in this embodiment, the combined capacitor further includes a housing, and the capacitor body 2 and the busbar 1 are both disposed in the housing, wherein the housing may be an injection molding structure, which is convenient for manufacturing the housing. The upper end face of the shell is provided with a plurality of bulges, and the mainboard or other components can be supported through the bulges, so that different components can be mutually matched, and the structure is compact. And the side surface of the shell is also provided with a reinforcing rib, so that the structural strength of the capacitor can be improved.

In addition, the combined capacitor further comprises a filler, and the filler is filled among the shell, the capacitor body 2 and the busbar 1. In this way, the plurality of capacitor bodies 2 and the busbar 1 can be firmly connected together by the filler, and can be protected by the case.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a combined capacitor, its characterized in that, includes female arranging (1) and capacitor body (2) of constituteing by electric capacity core (21), wherein, capacitor body (2) are two at least, every the positive pole of capacitor body (2) is drawn forth the end and is connected with one respectively female arranging (1), all the negative pole of capacitor body (2) is drawn forth the end and is connected same female arranging (1).

2. A combined capacitor according to claim 1, characterised in that the distance between two adjacent capacitor bodies (2) is 5 mm.

3. The combined capacitor as claimed in claim 1, wherein the number of the capacitor bodies (2) is two, the busbar (1) comprises two positive connecting busbars (11) and one negative connecting busbar (12), the positive electrode of the capacitor core (21) in each capacitor body (2) is connected with one positive connecting busbar (11), and the negative electrodes of the capacitor cores (21) in the two capacitor bodies (2) are connected with the negative connecting busbar (12).

4. The combined capacitor of claim 3, wherein the positive connecting busbar (11) and the negative connecting busbar (12) each comprise a busbar body (3) and a connecting plate (4) provided with a terminal (5), the connecting plate (4) is connected with the busbar body (3), and the terminal (5) on the positive connecting busbar (11) and the terminal (5) on the negative connecting busbar (12) are both arranged on the same side of the capacitor core (21).

5. A combined capacitor according to claim 3, wherein the capacitor core (21) is a cylinder or a flat body, the capacitor core (21) comprises two planes parallel to each other and a curved surface between the two planes, and the two planes of the capacitor core (21) are respectively connected with the positive connecting bus bar (11) and the negative connecting bus bar (12).

6. A combined capacitor according to any one of claims 1-5, characterized in that the capacitor cores (21) in each capacitor body (2) are plural and arranged in a plurality of rows and columns, wherein,

the curved surfaces of two adjacent capacitor cores (21) in each row are abutted; and/or the planes of two adjacent capacitor cores (21) in each column are abutted.

7. A combined capacitor according to claim 1, further comprising a case, wherein the capacitor body (2) and the busbar (1) are both arranged within the case.

8. A combined capacitor according to claim 7, further comprising a filler filled between the case, the capacitor body (2) and the busbar (1).

9. The combined capacitor as claimed in claim 4, wherein the busbar body (3) is rectangular, and the capacitor core (21) is fixedly connected with the corresponding busbar body (3) by welding.

10. A combined capacitor according to claim 7, characterised in that the housing is of injection moulded construction and the busbar (1) is of copper material.

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