CN216287995U - Capacitor unit, capacitor module, bus capacitor and vehicle - Google Patents
Capacitor unit, capacitor module, bus capacitor and vehicle Download PDFInfo
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- CN216287995U CN216287995U CN202122622009.4U CN202122622009U CN216287995U CN 216287995 U CN216287995 U CN 216287995U CN 202122622009 U CN202122622009 U CN 202122622009U CN 216287995 U CN216287995 U CN 216287995U
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Abstract
The utility model belongs to the technical field of vehicle parts, and relates to a capacitor unit, a capacitor module, a bus capacitor and a vehicle, which comprise a first electrode, a second electrode, a plurality of first connecting pieces, a plurality of second connecting pieces, a plurality of first dielectric sheet layers and a plurality of second dielectric sheet layers, wherein the first electrode and the second electrode are oppositely arranged, so that the plurality of first dielectric sheet layers and the plurality of second dielectric sheet layers are mutually spaced and alternately arranged between the first electrode and the second electrode; the first connecting piece and the second connecting piece are arc-shaped, two adjacent first dielectric sheet layers are connected through the first connecting piece, and two adjacent second dielectric sheet layers are connected through the second connecting piece. The capacitor unit of this application uses arc connecting piece fixed mounting between the dielectric lamella, not only increases the structural strength between the dielectric lamella, and under the capacitor of equidimension, the dielectric lamella can be done longer, and the area between the dielectric lamella is bigger to increase the electric capacity size.
Description
Technical Field
The utility model belongs to the technical field of vehicle parts and relates to a capacitor unit, a capacitor module, a bus capacitor and a vehicle.
Background
With the continuous popularization of new energy automobiles, the standards of parts in new energy automobile systems are correspondingly improved, the dynamic property of electric automobiles also becomes a reference index for consumers to purchase automobiles, the dynamic property of electric automobiles is directly related to a motor controller and a motor, and a bus capacitor is just an important element in the motor controller.
At present, a bus capacitor module of an electric automobile is mainly formed by winding a polypropylene film (a polypropylene film capacitor), and the bus capacitor module is connected with a copper bar and is plastically packaged in a plastic shell through epoxy resin.
According to the conventional bus capacitor module for the vehicle, a polypropylene film capacitor is replaced by a ceramic capacitor, and a ceramic capacitor unit is connected in series or in parallel on a printed circuit board to form the bus capacitor module, so that the capacitance volume of a bus is reduced. This scheme only constitutes bus capacitor module through small-size ceramic capacitor series connection and parallelly connected on printed circuit board, because printed circuit board overall arrangement's problem has certainly that the electric capacity is apart from the different problem of generating line distance, and in the in-service use, can lead to the electric capacity unit temperature that is close to the generating line higher, and the heat-sinking capability is relatively poor.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the capacitor unit, the capacitor module, the bus capacitor and the vehicle are provided for solving the problem that an existing bus capacitor module is poor in heat dissipation capacity.
To solve the above technical problem, in one aspect, the present invention provides a capacitor unit. The capacitor unit comprises a first electrode, a second electrode, a plurality of first connecting pieces, a plurality of second connecting pieces, a plurality of first dielectric sheet layers and a plurality of second dielectric sheet layers;
a plurality of said first dielectric sheet layers are connected to said first electrode and a plurality of said second dielectric sheet layers are connected to said second electrode; the first electrode and the second electrode are oppositely arranged, so that the first dielectric sheet layers and the second dielectric sheet layers are mutually spaced and alternately arranged between the first electrode and the second electrode;
the first connecting piece and the second connecting piece are arc-shaped; the top ends of two adjacent first dielectric sheet layers are connected through the first connecting piece, and the size of the connecting position of the two adjacent first dielectric sheet layers and the first connecting piece is matched with the length of the first connecting piece; the bottom ends of two adjacent second dielectric sheet layers are connected through the second connecting piece, and the size of the joint of the two adjacent second dielectric sheet layers and the second connecting piece is matched with the length of the second connecting piece.
Optionally, the first electrode is parallel to the second electrode, and the plurality of first dielectric layers and the plurality of second dielectric layers are perpendicular to the first electrode;
the first dielectric sheet layers are arranged at equal intervals, the second dielectric sheet layers are arranged at equal intervals, and the first dielectric sheet layers are at the same distance with the two adjacent second dielectric sheet layers.
Optionally, a conductive substance is filled in a gap between the first connecting member, the first electrode and two adjacent first dielectric sheet layers, and a conductive substance is filled in a gap between the second connecting member, the second electrode and two adjacent second dielectric sheet layers.
Optionally, the capacitor unit further comprises a capacitor unit housing, and the first electrode, the second electrode, the plurality of first connectors, the plurality of second connectors, the plurality of first dielectric sheets and the plurality of second dielectric sheets are disposed in the capacitor unit housing;
a first copper bar and a second copper bar are arranged on the capacitor unit shell, the first copper bar is electrically connected with the first electrode, and the second copper bar is electrically connected with the second electrode;
optionally, the first connecting piece includes a plurality of first arc-shaped connecting pieces linearly arranged along a first direction, and the plurality of first arc-shaped connecting pieces are stacked to form the first arc-shaped connecting piece;
the second connecting piece comprises a plurality of second arc-shaped connecting pieces which are linearly arranged along a first direction, and the second arc-shaped connecting pieces are stacked to form the second arc-shaped connecting piece.
Optionally, the arc angle of the first arc-shaped connecting sheet is 120-180 degrees, the arc radius of the first arc-shaped connecting sheet is 2-3 μm, and the length of the first arc-shaped connecting sheet is 10 mm;
the arc angle of the second arc-shaped connecting sheet is 120-180 degrees, the arc radius of the second arc-shaped connecting sheet is 2-3 mu m, and the length of the second arc-shaped connecting sheet is 10 mm.
Optionally, the thickness of the first dielectric sheet layer and the second dielectric sheet layer is 1.2-3 μm.
Optionally, the length of the first dielectric sheet layer and the second dielectric sheet layer is 40mm, and the width of the first dielectric sheet layer and the second dielectric sheet layer is 30 mm.
In the capacitor unit provided by the embodiment of the utility model, the first connecting piece and the second connecting piece are arc-shaped, the top ends of two adjacent first dielectric sheet layers are connected through the first connecting piece, and the size of the joint of the two adjacent first dielectric sheet layers and the first connecting piece is matched with the length of the first connecting piece; the bottom ends of two adjacent second dielectric sheet layers are connected through the second connecting piece, and the size of the joint of the two adjacent second dielectric sheet layers and the second connecting piece is matched with the length of the second connecting piece. The capacitor unit of this application uses arc connecting piece fixed mounting between the dielectric lamella, not only increases the structural strength between the dielectric lamella, and under the capacitor of equidimension, the dielectric lamella can be done longer, and the area between the dielectric lamella is bigger to increase the electric capacity size. And simultaneously, the radiator has better heat radiation performance.
On the other hand, the embodiment of the utility model also provides a capacitor module which comprises a circuit board and the capacitor units, wherein the first copper bars and the second copper bars of the plurality of capacitor units are respectively electrically connected with the circuit board.
On the other hand, the embodiment of the utility model also provides a bus capacitor which comprises a shell and the capacitor module, wherein the capacitor module is plastically packaged in the shell, and the first copper bar and the second copper bar penetrate out of the shell.
In another aspect, the embodiment of the utility model further provides a vehicle, which includes the bus capacitor.
Therefore, the vehicle can obtain larger capacitance, equivalent resistance is reduced, and the power performance of the vehicle is greatly improved.
Drawings
Fig. 1 is a schematic diagram of a capacitor unit according to an embodiment of the utility model;
fig. 2 is a schematic diagram of an internal structure of a capacitor unit according to an embodiment of the present invention;
fig. 3 is a top view of an internal structure of a capacitor unit according to an embodiment of the utility model;
fig. 4 is a schematic diagram of a bus capacitor according to an embodiment of the utility model.
The reference numerals in the specification are as follows:
100. a capacitor unit;
1. a capacitor unit housing; 11. a first copper bar; 12. a second copper bar;
2. a first electrode; 3. a second electrode;
4. a first connecting member; 4A, a first arc-shaped connecting piece; 41. a first arc-shaped connecting sheet;
5. a second connecting member; 5A, a second arc-shaped connecting piece; 51. a second arc-shaped connecting sheet;
6. a first dielectric sheet layer; 7. a second dielectric sheet layer; 8. a conductive substance; 9. a non-conductive substance; 200. a bus capacitor; 201. a housing.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1 to fig. 3, a capacitor unit 100 according to an embodiment of the present invention includes a first electrode 2, a second electrode 3, a plurality of first connectors 4, a plurality of second connectors 5, a plurality of first dielectric layers 6, and a plurality of second dielectric layers 7.
A plurality of the first dielectric layers 6 are connected to the first electrodes 2, and a plurality of the second dielectric layers 7 are connected to the second electrodes 3; the first electrode 2 and the second electrode 3 are disposed opposite to each other such that the plurality of first dielectric layers 6 and the plurality of second dielectric layers 7 are spaced apart from each other and alternately arranged between the first electrode 2 and the second electrode 3.
The first connecting piece 4 and the second connecting piece 5 are arc-shaped. The top ends of two adjacent first dielectric sheet layers 6 are connected through the first connecting piece 4, and the size of the connecting position of the two adjacent first dielectric sheet layers 6 and the first connecting piece 4 is matched with the length of the first connecting piece 4; the bottom ends of two adjacent second dielectric layers 7 are connected through the second connecting piece 5, and the size of the joint of the two adjacent second dielectric layers 7 and the second connecting piece 5 is matched with the length of the second connecting piece 5.
According to a capacitance formula C ═ epsilon S/d, the capacitance value is in direct proportion to the dielectric epsilon between the dielectric sheets and the area S of the dielectric sheets, and in inverse proportion to the distance d between the dielectric sheets.
In one embodiment, the first electrode 2 is a positive electrode and the second electrode 3 is a negative electrode.
In one embodiment, the first electrode 2 is parallel to the second electrode 3, and the plurality of first dielectric layers 6 and the plurality of second dielectric layers 7 are perpendicular to the first electrode 2.
The first dielectric sheet layers 6 are arranged at equal intervals, the second dielectric sheet layers 7 are arranged at equal intervals, and the first dielectric sheet layers 6 are arranged at the same distance from two adjacent second dielectric sheet layers 7.
In an embodiment, a gap between the first connection member 4, the first electrode 2 and two adjacent first dielectric layers 6 is filled with a conductive substance 8, and a gap between the second connection member 5, the second electrode 3 and two adjacent second dielectric layers 7 is filled with a conductive substance 8.
In an embodiment, the capacitor unit further includes a capacitor unit housing 1, and the first electrode 2, the second electrode 3, the plurality of first connectors 4, the plurality of second connectors 5, the plurality of first dielectric layers 6, and the plurality of second dielectric layers 7 are disposed in the capacitor unit housing 1.
The capacitor unit comprises a capacitor unit shell 1 and is characterized in that a first copper bar 11 and a second copper bar 12 are arranged on the capacitor unit shell 1, the first copper bar 11 is electrically connected with a first electrode 2, and the second copper bar 12 is electrically connected with a second electrode 3.
In an embodiment, a non-conductive substance 9 is filled between the adjacent first dielectric sheet layer and the second dielectric sheet layer.
The arc-shaped connecting piece increases the connecting strength between the electrode and the dielectric sheet layer, the contact area S between the electrode and the dielectric sheet layer is enlarged, the resistance value is in direct proportion to the conductor resistivity rho and the conductor length L and in inverse proportion to the conductor cross-sectional area S according to a resistance formula R, the resistance between a single dielectric sheet layer and the electrode is reduced, and the plurality of dielectric sheet layers are connected to the electrode in parallel, so that the equivalent resistance of the capacitor is reduced, and the charge-discharge rate of the capacitor is improved.
In an embodiment, the first connecting member 4 includes a plurality of first arc-shaped connecting pieces 41 linearly arranged along a first direction, and a plurality of the first arc-shaped connecting pieces 41 are stacked to form a first arc-shaped connecting member 4A.
The second connecting piece 5 comprises a plurality of second arc-shaped connecting pieces 51 which are linearly arranged along the first direction, and the plurality of second arc-shaped connecting pieces 51 are stacked to form a second arc-shaped connecting piece 5A.
In an embodiment, the arc angle of the first arc-shaped connecting piece 41 is 120-.
The arc angle of the second arc-shaped connecting sheet 51 is 120-180 degrees, the arc radius of the second arc-shaped connecting sheet 51 is 2-3 mu m, and the length of the second arc-shaped connecting sheet 51 is 10 mm.
In one embodiment, the thickness of the first dielectric sheet layer 6 and the second dielectric sheet layer 7 is 1.2-3 μm.
In one embodiment, the length of the first and second dielectric layers 6 and 7 is 40mm, and the width of the first and second dielectric layers 6 and 7 is 30 mm.
According to the capacitor unit of the embodiment of the utility model, the first connecting piece 4 and the second connecting piece 5 are arc-shaped, the top ends of two adjacent first dielectric sheet layers 6 are connected through the first connecting piece 4A, and the size of the joint of the two adjacent first dielectric sheet layers and the first connecting piece is matched with the length of the first connecting piece; the bottom ends of two adjacent second dielectric layers 7 are connected through the second connecting piece 5A, and the size of the joint of the two adjacent second dielectric layers and the second connecting piece is matched with the length of the second connecting piece. The capacitor unit of this application uses arc connecting piece fixed mounting between the dielectric lamella, not only increases the structural strength between the dielectric lamella, and under the capacitor of equidimension, the dielectric lamella can be done longer, and the area between the dielectric lamella is bigger to increase the electric capacity size. And simultaneously, the radiator has better heat radiation performance.
In addition, an embodiment of the present invention further provides a capacitor module, which includes a circuit board (not shown in the drawings) and the capacitor units 100 of the above embodiments, wherein the first copper bars 11 and the second copper bars 12 of the plurality of capacitor units 100 are electrically connected to the circuit board respectively.
In addition, as shown in fig. 4, an embodiment of the present invention further provides a bus capacitor 200, which includes a housing 201 and the capacitor module of the above embodiment, wherein the capacitor module is plastic-encapsulated in the housing 201, and the first copper bar 11 and the second copper bar 12 penetrate through the housing 201.
In addition, an embodiment of the present invention further provides a vehicle, which includes the bus capacitor 200 of the above embodiment.
Therefore, the vehicle can obtain larger capacitance, equivalent resistance is reduced, and the power performance of the vehicle is greatly improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. A capacitor unit is characterized by comprising a first electrode, a second electrode, a plurality of first connecting pieces, a plurality of second connecting pieces, a plurality of first dielectric sheet layers and a plurality of second dielectric sheet layers;
a plurality of the first dielectric sheet layers are connected to the first electrode, and a plurality of the second dielectric sheet layers are connected to the second electrode; the first electrode and the second electrode are oppositely arranged, so that the first dielectric sheet layers and the second dielectric sheet layers are mutually spaced and alternately arranged between the first electrode and the second electrode;
the first connecting piece and the second connecting piece are arc-shaped; the top ends of two adjacent first dielectric sheet layers are connected through the first connecting piece, and the size of the connecting position of the two adjacent first dielectric sheet layers and the first connecting piece is matched with the length of the first connecting piece; the bottom ends of two adjacent second dielectric sheet layers are connected through the second connecting piece, and the size of the joint of the two adjacent second dielectric sheet layers and the second connecting piece is matched with the length of the second connecting piece.
2. The capacitive unit of claim 1 wherein the first electrode is parallel to a second electrode, and the plurality of first and second dielectric slabs are perpendicular to the first electrode;
the first dielectric sheet layers are arranged at equal intervals, the second dielectric sheet layers are arranged at equal intervals, and the first dielectric sheet layers are at the same distance with the two adjacent second dielectric sheet layers.
3. The capacitor unit according to claim 1, wherein a gap between the first connecting member, the first electrode and two adjacent first dielectric layers is filled with a conductive substance, and a gap between the second connecting member, the second electrode and two adjacent second dielectric layers is filled with a conductive substance.
4. The capacitive unit of claim 1 further comprising a capacitive unit housing, the first electrode, the second electrode, the plurality of first connectors, the plurality of second connectors, the plurality of first dielectric sheets, and the plurality of second dielectric sheets being disposed within the capacitive unit housing;
the capacitor unit comprises a capacitor unit shell and is characterized in that a first copper bar and a second copper bar are arranged on the capacitor unit shell, the first copper bar is electrically connected with a first electrode, and the second copper bar is electrically connected with a second electrode.
5. The capacitor unit of claim 1, wherein the first connection member comprises a plurality of first arcuate connection tabs arranged linearly along a first direction, the plurality of first arcuate connection tabs being stacked to form a first arcuate connection member;
the second connecting piece comprises a plurality of second arc-shaped connecting pieces which are linearly arranged along a first direction, and the second arc-shaped connecting pieces are stacked to form the second arc-shaped connecting piece.
6. The capacitor unit according to claim 5, wherein the arc angle of the first arc-shaped connecting sheet is 120-180 °, the arc radius of the first arc-shaped connecting sheet is 2-3 μm, and the length of the first arc-shaped connecting sheet is 10 mm;
the arc angle of the second arc-shaped connecting sheet is 120-180 degrees, the arc radius of the second arc-shaped connecting sheet is 2-3 mu m, and the length of the second arc-shaped connecting sheet is 10 mm.
7. The capacitive unit of claim 1 wherein the first and second dielectric layers have a thickness of 1.2-3 μm.
8. The capacitive unit of claim 1 wherein the first and second layers of dielectric have a length of 40mm and a width of 30 mm.
9. A capacitor module, comprising a circuit board and a plurality of capacitor units as claimed in any one of claims 1 to 8, wherein the first copper bar and the second copper bar of the plurality of capacitor units are electrically connected to the circuit board respectively.
10. A bus capacitor, comprising a housing and the capacitor module of claim 9, wherein the capacitor module is plastically packaged in the housing, and the first copper bar and the second copper bar penetrate out of the housing.
11. A vehicle comprising the bus capacitor of claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122622009.4U CN216287995U (en) | 2021-10-28 | 2021-10-28 | Capacitor unit, capacitor module, bus capacitor and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122622009.4U CN216287995U (en) | 2021-10-28 | 2021-10-28 | Capacitor unit, capacitor module, bus capacitor and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216287995U true CN216287995U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122622009.4U Active CN216287995U (en) | 2021-10-28 | 2021-10-28 | Capacitor unit, capacitor module, bus capacitor and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216287995U (en) |
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2021
- 2021-10-28 CN CN202122622009.4U patent/CN216287995U/en active Active
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