KR20160053282A - Clad Metal Bus Bar Capacitor - Google Patents

Clad Metal Bus Bar Capacitor Download PDF

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Publication number
KR20160053282A
KR20160053282A KR1020140150871A KR20140150871A KR20160053282A KR 20160053282 A KR20160053282 A KR 20160053282A KR 1020140150871 A KR1020140150871 A KR 1020140150871A KR 20140150871 A KR20140150871 A KR 20140150871A KR 20160053282 A KR20160053282 A KR 20160053282A
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South Korea
Prior art keywords
copper
layer
bus bar
metal plate
metal
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KR1020140150871A
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Korean (ko)
Inventor
박대진
전용원
한기주
박진아
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주식회사 뉴인텍
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Priority to KR1020140150871A priority Critical patent/KR20160053282A/en
Priority to PCT/KR2014/010837 priority patent/WO2016072544A1/en
Publication of KR20160053282A publication Critical patent/KR20160053282A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/02—Mountings
    • H01G2/04—Mountings specially adapted for mounting on a chassis
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/224—Housing; Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/228—Terminals
    • H01G4/236—Terminals leading through the housing, i.e. lead-through
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/32—Wound capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Abstract

The present invention relates to a plasma display panel comprising capacitor elements in which a dielectric film is wound and formed and conductive flat surfaces are formed on both sides thereof, a bus bar electrically connected to both sides of the solvent surface of the capacitor elements (1) And a housing case (3), wherein the bus bar is a clad metal bus bar (100) having at least one dissimilar metal selected from copper or aluminum bonded thereto,
The clad metal bus bar 100 includes a metal plate layer 10 formed in the middle, a first copper layer 20 made of copper (Cu) bonded to one side of the metal plate layer 10, And a second copper layer (30) made of copper (Cu) bonded to the other side of the first and second bus bars (10, 10).

Description

[0001] The present invention relates to a capacitor having a clad metal bus bar,

The present invention relates to a capacitor with a clad metal bus bar.

2. Description of the Related Art Generally, capacitors for electric devices, phase inverters, and electronic devices are widely used in various industrial fields. Such a capacitor is formed by using a plastic film such as a polyester (PET) resin, a polypropylene (PP) resin, a polyethylene naphthalate (PEN) resin, a polycarbonate (PC) resin or a polyphenylene sulfide (PPS) A vapor deposition film in which a metal is deposited on one side or both sides of a plastic film is wound and a zinc film, a zinc alloy, tin or a primary zinc secondary tin is sprayed on both sides of the wound vapor deposition film to manufacture a capacitor device do. Since the capacitances of the capacitors differ depending on the use of the capacitors, capacitors are manufactured by adding and connecting the number of capacitor elements (hereinafter, elements) to the other N-pole bus bars and P-pole bus bars. And a large-capacity capacitor connects a plurality of devices to manufacture a capacitor. Japanese Patent Application Laid-Open No. 2001-0072178 (Panasonic) discloses a method of manufacturing a capacitor and a capacitor.

All bus bars of existing conventional capacitors have been made of copper material with a copper material. These copper bus bar capacitors have good electrical conductivity, but have a high density (specific gravity) of 8.89 g / cm 3, which is disadvantageous in that the weight of the capacitor is heavy and the cost of the copper plate is high. The present invention has been developed because it is required to meet the necessity of lightweight capacitor development and raw material cut-off due to recent vehicle weight reduction and copper value increase.

The present invention relates to a capacitor having a clad metal bus bar that can reduce the overall cost of a capacitor in accordance with the weight reduction of a bus, .

The present invention relates to a copper bus bar having a Cu (Al + Cu) material (Cu) bonded to both sides of an aluminum material and having a specific gravity of 40 to 50% (48% in the example), and a weight saving of the clad metal bus bar.

In the capacitor having the clad metal bus bar of the present invention,

A capacitor element in which an entire film is wound and formed, and on both sides thereof a conductive sprayed surface is formed;

A bus bar electrically connected to both sides of the melting surface of the capacitor elements 1,

And a housing case (3) incorporating the capacitor element and the bus bar combination,

The bus bar is a clad metal bus bar 100 coupled with at least one dissimilar metal selected from copper or aluminum,

The clad metal bus bar (100)

A metal plate layer 10 formed in the middle,

A first copper layer 20 of copper (Cu) bonded to one side of the metal plate layer 10,

A second copper layer 30 of copper (Cu) bonded to the other side of the metal plate layer 10,

And a control unit.

According to the present invention, by developing a bus bar for cost reduction by increasing the price of raw material of copper, it is possible to reduce the bus bar unit cost, reduce the total weight of the capacitor according to the weight reduction of the vehicle, A capacitor with a metal bus bar is provided.

According to the present invention, a material (Cu + Al + Cu) having copper (Cu) bonded to both sides of an aluminum material is used as a bus bar and its specific gravity is about 40 to 50% A capacitor having a clad metal bus bar capable of reducing the weight by a predetermined amount can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a whole view of a capacitor with a clad metal bus bar according to an embodiment of the present invention; FIG.
2 is a block diagram of a clad metal bus bar according to an embodiment of the present invention;
3 is a block diagram of a bus bar by hot rolling according to an embodiment of the present invention.
Figure 4 shows the Cu bus bar and aluminum (Al) bus bar characteristics table

Hereinafter, a capacitor having a clad metal bus bar according to an embodiment of the present invention will be described. FIG. 1 is a whole view of a capacitor having a clad metal bus bar according to an embodiment of the present invention, FIG. 2 is a view illustrating a clad metal bus bar according to an embodiment of the present invention, and FIG. 3 is a cross- And is a bus bar configuration diagram by hot rolling.

As shown in FIGS. 1 to 3, particularly, FIG. 2A, a capacitor having a clad metal bus bar according to an embodiment of the present invention includes capacitor elements formed by winding a dielectric film and having conductive surfaces on both sides thereof. A bus bar electrically connected to both sides of the surface of the capacitor elements 1, and a housing case 3 incorporating a capacitor element and a bus bar combination. The bus bar is a clad metal bus bar 100 coupled with at least one dissimilar metal selected from copper or aluminum. The clad metal bus bar 100 includes a metal plate layer 10 formed in the middle and a first copper layer 20 made of copper bonded to one side of the metal plate layer 10.

The material of the metal plate layer 10 is preferably aluminum (Al). In the present invention, the material of the metal plate layer 10 is preferably aluminum (Al). Iron, stainless steel, or other non-ferrous metals may be used as the material of the metal plate layer 10, but Al is preferred for the purpose of the present invention when considering specific gravity and raw material cost.

2A, the thickness of the metal plate layer 10 is 0.3 to 5 mm, the thickness of the first copper layer 20 is 0.05 to 2 mm, and the metal plate layer 10 is formed of the first copper layer 20, It is preferable that it is formed thicker. When the Al layer is less than 0.3 mm, a relatively large amount of copper is required, and the weight of the bus bar is increased, so that it is disposed for the purpose of the present invention. Larger than 5 mm consumes more material than is necessary for the bus bar function. When the thickness of the copper plate is less than 0.05 mm, it is difficult to secure the electric conductivity and the workability of the plywood and plating is poor. If it is larger than 2 mm, the weight of the bus bar is increased and the weight is reduced. When the material of the metal plate layer 10 is aluminum (Al), the thickness of the metal plate layer 10 is 0.5 to 3.0 mm and the thickness of at least one of the first and second copper layers 20 and 30 is 0.1 to 1.0 mm The test results show that the capacitor bus bar is the most suitable when the prototype is manufactured.

2B, it is preferable to further include a second copper layer 30 made of copper (Cu) bonded to the other side of the metal plate layer 10. The current density tends to increase to the outside of the surface of the conductor due to the skin effect when electricity is conducted and the current flows, so that copper or electro-tin plating is applied to both surfaces of the metal plate layer. And electrical characteristics were improved.

2B, the thickness of the metal plate layer 10 is 0.3 to 5 mm, the thickness of the first and second copper layers 20 and 30 is 0.05 to 2 mm, Is formed thicker than the first and second copper layers (20, 30). It is preferable that the thickness of the metal plate layer 10 is 0.3 to 5 mm and the thickness of the first copper layer 20 is 0.05 to 2 mm and the metal plate layer 10 is thicker than the first copper layer 20. When the Al layer is less than 0.3 mm, a relatively large amount of copper is required, and the weight of the bus bar is increased, so that it is disposed for the purpose of the present invention. Larger than 5 mm consumes more material than is necessary for the bus bar function. When the thickness of the copper plate is less than 0.05 mm, it is difficult to secure the electric conductivity and the workability of the plywood and plating is poor. If it is larger than 2 mm, the weight of the bus bar is increased and the weight is reduced. The first and second copper layers 20 and 30 are formed by plating on one side and the other side of the metal plate layer 10.

In the capacitor having the clad metal bus bar according to the embodiment of the present invention, one outer plating layer 40 selected from a tin plating layer, a nickel plating layer or a chromium plating layer is formed on one side of the first copper layer 20 and on the second side It is preferable that the copper layer 30 is further connected to the other side of the copper layer 30. The outer plating layer, such as electro-tin plating and chromium plating layer, functions to prevent the copper plating layer from contacting with air and to prevent the oxidized shape of the copper plating layer by contact with air.

3, the metal plate layer 10 and the first copper layer 20 are formed on one side of the metal disc 210 supplied from the third roll R3, The metallic disc 210 and the first copper disc 220 are simultaneously supplied between the upper rolling roll R10 and the lower rolling roll R20 so as to be manufactured by hot rolling with the copper single disc 220 placed thereon .

3, the metal plate layer 10 and the first and second copper layers 20 and 30 are formed on both sides of the metal disc 210 fed from the third roll R3, The first copper disk 220 supplied from the first roll 220 and the second copper disk 230 supplied from the first roll R2 are positioned on the first copper disk 220 and the first copper disk 220, It is preferable that the two copper discs 230 are simultaneously supplied between the upper rolling roll R10 and the lower rolling roll R20 to be hot-rolled. The capacitor is preferably used for a hybrid vehicle, an electric vehicle, a hydrogen fuel cell vehicle, an inverter for a plug-in electric vehicle, or an industrial inverter.

Hereinafter, the physical properties related to the present invention, test results, etc. will be described.

Density, electrical conductivity, unit price comparison

division Density / specific gravity
(g / cm3) Electrical conductivity
(IACS%) P, N pole bus bar
Size (m) weight
(g) ESR
(mΩ) ΔT
(° C) unit price East (CU) 8.89 98 1.5t x 268 x 94mm 273 1.11 7.1 No big difference aluminum 2.7 70 83 1.18 7.55 Reduction rate -69.6% -28.6% - -69.6% 6.3% 6.3%

Since the electric current flows to the surface of the bus bar due to the skin effect at the time of energization, the inner material of the bus bar is made of a material having a low electrical conductivity, low cost and low specific gravity, And the resistance was increased. As a result, the intermediate address material was made of aluminum, and a very thin copper plate was attached to both surfaces of aluminum by hot rolling to prepare a bus bar for capacitor after electroplating.

As a result of testing the bus bars for capacitors, the weight of the bus bars was reduced by 48.7%, and the electrical conductivity decreased by 26.5% compared with the copper plate, but the ESR of the capacitor series equivalent resistance after the manufacture of the capacitors was very small. There is little difference.) As a result of the capacitor temperature rise test, the internal heat generation of the capacitor was low and there was almost no difference compared to the copper plate. Although the bus bar sample unit price was about 5% cheaper, the bus bar unit price cut effect should be large when mass production is applied.

Effect: Density, electrical conductivity, unit price comparison

division Density / specific gravity
(g / cm3) Electrical conductivity
(IACS%) P, N pole bus bar
Size (m) weight
(g) ESR
(mΩ) ΔT
(° C) unit price East (CU) 8.89 98 1.5t x 268 x 94mm 273 1.11 7.1 Reduction of about 10% or more in mass production Clad metal 4.56 72 138 1.14 7.3 Reduction rate -48.7% -26.5% - -49.5% 2.7% 2.8%

Capacitor test results

division Heat shock test Moisture resistance test Low-temperature test High temperature load test Vibration test Exam conditions -40 ° C, + 100 ° C, 1 hour 500 cycles each 85 [deg.] C, 85%, 500 hours -40 ℃ 500 hours 600V, 85 DEG C, 80A,
1000 hours 4.5G (10-25 Hz, 0.5 G (100-200 Hz), XYZ 5 hours each copper Good Good Good Good Good Clad metal Good Good Good Good Good

* It was the same in all other characteristics and durability tests when fabricating bus bars for capacitors and for fabricating clad metal bus bars.

Bus bar  Characteristics comparison [P-pole & N-pole for vehicle inverter]

division Weight (g)
(1 set_P pole / N pole) Electrical resistance
(mΩ) Torque clamping force (N · m) Temperature rise test result
(Film capacitor,? T) material Thickness (t) YF HE M-PROTO Cu (1100) 1.0 379g 1.73 x 10 ^ -8 10N · m can be tightened 92 ° C 97 ℃ Clad metal (Cu fraction 30%: volume ratio, thickness ratio) 212g 2.25 x 10 ^ -8 10N · m can be tightened 92 ° C 97.2 DEG C Al (1050) 120g 2.82 × 10 ^ -8 10N · m can be tightened 93.2 DEG C 97.6 ° C

Bus bar  Manufacturing cost (P-pole & N-pole for vehicle inverter)

division Material cost Processing Cost + Plating Ratio + Others Sum material Thickness (t) Cu (1100) 1.0 \ 12,500 \ 3,600 \ 16,100 Clad metal (Cu fraction 30%) - - - Al (1050) \ 4,320 \ 4,830 \ 9,150

3) Main characteristics ( Cu / Al / Cu Clad  metal)

- Density: 37% ~ 58% of Cu

- Electrical conductivity: 63% ~ 77% of Cu

division Cu Clad metal
(Cu fraction 10%: volume ratio)) Clad metal
(Cu fraction 20%: volume ratio)) Clad metal
(Cu fraction 30%: volume ratio)) Clad metal
(Cu fraction 40%: volume ratio - thickness ratio))

Figure pat00001

<Cu / Al / Cu clad metal> density
(g / cm3) 8.89 3.33 3.95 4.56 5.18 37% relative to Cu 44% relative to Cu 51% relative to Cu 58% relative to Cu Electrical conductivity
(IACS%) 98 62 67 72 75 63% relative to Cu 68% relative to Cu 73% 77% relative to Cu

※ prefecture, applicable material: Cu fraction 30%

Clad  metal Bus bar  Thermal shock test results ( Link ): Link Capacitor  result

Figure pat00002

As shown in the above table, there was no significant difference in the quality of test results between the copper plates. If the ratio of the copper plate at the bending time after bending the clad bus bar is low, cracks may occur in the bent portion. Volume ratio, thickness ratio). There was no abnormality in the characteristics of the link capacitors after the clad metal thermal shock test.

CAC bus bar Characteristics: Cu (Cu + Al + Cu) material with Cu on both sides of Al material: 40 ~ 50% of the specific gravity is about 40%

Compare Al CCA Cu Purity (%), Cu volume ratio (%) 99.9 15 20 25 99.9 Specific gravity (20 ℃) 2.702 3.65 3.96 4.25 8.89 Electrical conductivity (IACS,%) 61.7 67.0 70.0 72.0 100 Thermal expansion coefficient (20 ~ 100 ℃) 23.86 x 10 ^ -8 22.4 x 10 ^ -8 21.8 x 10 ^ -8 21.3 x 10 ^ -8 16.8 x 10 ^ -8 Tensile Strength (MPa) 78 ~ 108 108 ~ 196 127-196 147-196 235 to 275

division Exam conditions sample water Criteria Remarks Temperature rise test 16 KHz, 80 Arms, 85 C, 500 Vdc One Below 105 ℃ Sensor 5Point
Pass Moisture resistance test 85 C, 85% RH, 450 Vdc, 750 Hrs 5 1) Capacity change Within ± 5%

2) There will be no bus bars. Pass Thermal shock test -40 ℃ 1Hrs · 100 ℃ 1Hrs, 750Cycle 5 Pass Low-temperature neglect test  -40 ° C 750h 3 Pass Vibration test 4.5G, 5 to 200 Hz, Sweep = 10M, XY = 2h, Z = 4h 3 Pass Sum 17 Pass

<Copper plating method>

The aluminum busbars were reduced by about 69%, the electrical conductivity and series equivalent resistance ESR were low, and the internal heat of the capacitor was low. The cost of the bus bar is about 50% higher than that of aluminum copper, but the cost of bus bargins is insignificant because plating costs have risen in order to improve the electrical conductivity.

<Comparative Example>

In the development process of the present invention (comparative example), a bus bar was produced by plating an aluminum plate having a low density (specific gravity) (2.7 g / cm 3) with electro tin plating. As a result, the specific gravity was low and the weight was low (-69.6% The conductivity is lowered and the ESR (series equivalent resistance) is high, so that thermal property deterioration and electro-tin plating are not easily performed inside the capacitor.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, &Lt; RTI ID = 0.0 &gt; and / or &lt; / RTI &gt;

It is to be understood that the appended claims are intended to supplement the understanding of the invention and should not be construed as limiting the scope of the appended claims.

100: Clad metal bus bar 10: Metal plate layer
20: a first copper layer 30: a second copper layer
40: outer plating layer 210: metal plate
220: primary copper disk 230: secondary copper disk
R1: first roll R2: second roll
R3: third roll R10: upper rolling roll
R20: Lower rolling roll

Claims (11)

A capacitor element in which a dielectric film is wound and formed and both sides thereof are formed with a conductive sprayed surface,
A bus bar electrically connected to both sides of the melting surface of the capacitor elements 1,
And a housing case (3) incorporating the capacitor element and the bus bar combination,
Wherein the bus bar is a clad metal bus bar 100 coupled with at least one dissimilar metal selected from copper or aluminum.
The method according to claim 1,
The clad metal bus bar (100)
A metal plate layer 10 formed in the middle,
A first copper layer 20 of copper (Cu) bonded to one side of the metal plate layer 10,
And a second electrode connected to the second electrode.
3. The method of claim 2,
A second copper layer 30 of copper (Cu) bonded to the other side of the metal plate layer 10,
Further comprising: a first electrode connected to the first electrode and a second electrode connected to the second electrode;
3. The method of claim 2,
The thickness of the metal plate layer 10 is 0.3 to 5 mm,
The thickness of the first copper layer 20 is 0.05 to 2 mm,
Wherein the metal plate layer (10) is thicker than the first copper layer (20).
The method of claim 3,
The thickness of the metal plate layer 10 is 0.3 to 5 mm,
The thickness of the first and second copper layers 20 and 30 is 0.05 to 2 mm,
Wherein the metal plate layer (10) is thicker than the first and second copper layers (20, 30).
The method according to claim 4 or 5,
The material of the metal plate layer 10 is aluminum (Al)
The thickness of the metal plate layer 10 is 0.5 to 3.0 mm,
Wherein a thickness of at least one of the first and second copper layers (20, 30) is 0.1 to 1.0 mm.
The method according to claim 4 or 5,
An outer plating layer 40 selected from a tin plating layer (or an electro tin plating layer), a nickel plating layer or a chromium plating layer is interposed between one side of the first copper layer 20 and the other side of the second copper layer 30 Wherein the first and second clad metal bus bars are electrically connected to each other.
The method according to claim 4 or 5,
The metal plate layer 10 and the first copper layer 20 are formed by a first copper plate 220 supplied from a first roll R 1 to one side of a metal plate 210 supplied from a third roll R 3 Wherein the metal disk 210 and the first copper disk 220 are simultaneously supplied between the upper and lower rolling rolls R10 and R20 to be hot rolled. A capacitor with a bar.
The method according to claim 4 or 5,
The metal plate layer 10 and the first and second copper layers 20 and 30 are formed on both sides of the metal disc 210 supplied from the third roll R3 with the first copper R1 supplied from the first roll R1, The first copper disc 220 and the second copper disc 230 are placed in a state in which the disc 220 and the second copper disc 230 supplied from the first roll R2 are positioned. And simultaneously supplied between the upper rolling roll (R10) and the lower rolling roll (R20) to be hot rolled.
The method according to claim 4 or 5,
Wherein the first and second copper layers (20, 30) are plated on one side and the other side of the metal plate layer (10).
The method according to claim 4 or 5,
Wherein the capacitor is used for a hybrid vehicle, an electric vehicle, a hydrogen fuel cell vehicle, an inverter of a plug-in electric vehicle, and an inverter for industrial use.



KR1020140150871A 2014-11-03 2014-11-03 Clad Metal Bus Bar Capacitor KR20160053282A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020140150871A KR20160053282A (en) 2014-11-03 2014-11-03 Clad Metal Bus Bar Capacitor
PCT/KR2014/010837 WO2016072544A1 (en) 2014-11-03 2014-11-12 Capacitor having clad metal bus bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140150871A KR20160053282A (en) 2014-11-03 2014-11-03 Clad Metal Bus Bar Capacitor

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220030822A (en) 2020-09-03 2022-03-11 주식회사 엘지에너지솔루션 Busbar structure for battery module
EP4170811A1 (en) * 2021-10-25 2023-04-26 A.F.W. Co., Ltd. Battery module for electric vehicle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002151045A (en) * 2000-11-10 2002-05-24 Honda Motor Co Ltd Bus bar for battery module and battery module
KR100652202B1 (en) * 2005-04-01 2006-12-01 에덴테크 주식회사 A Cu/Al/ferro-alloy/Al/Cu clad steel sheet and a method for manufacturing the same
KR20140001290A (en) * 2012-06-25 2014-01-07 현대모비스 주식회사 Clad metal bus bar for film capacitor
KR101436787B1 (en) * 2013-12-31 2014-09-11 주식회사 뉴인텍 Case Molding Type Low Inductance Condensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220030822A (en) 2020-09-03 2022-03-11 주식회사 엘지에너지솔루션 Busbar structure for battery module
EP4170811A1 (en) * 2021-10-25 2023-04-26 A.F.W. Co., Ltd. Battery module for electric vehicle

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