WO2015054949A1 - 电力电容器及其制造方法 - Google Patents

电力电容器及其制造方法 Download PDF

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Publication number
WO2015054949A1
WO2015054949A1 PCT/CN2013/088289 CN2013088289W WO2015054949A1 WO 2015054949 A1 WO2015054949 A1 WO 2015054949A1 CN 2013088289 W CN2013088289 W CN 2013088289W WO 2015054949 A1 WO2015054949 A1 WO 2015054949A1
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WO
WIPO (PCT)
Prior art keywords
welding
welded
electrode
capacitor
core
Prior art date
Application number
PCT/CN2013/088289
Other languages
English (en)
French (fr)
Inventor
张雅舒
王宁来
周存和
王博
丁鹏
Original Assignee
正泰电气股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 正泰电气股份有限公司 filed Critical 正泰电气股份有限公司
Priority to US15/039,317 priority Critical patent/US20160300664A1/en
Priority to EP13895691.7A priority patent/EP3059747A4/en
Priority to AU2013403103A priority patent/AU2013403103B2/en
Publication of WO2015054949A1 publication Critical patent/WO2015054949A1/zh

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Classifications

    • 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
    • H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
    • H01G4/385—Single unit multiple capacitors, e.g. dual capacitor in one coil
    • 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
    • H01G4/232—Terminals electrically connecting two or more layers of a stacked or rolled capacitor
    • 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
    • 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
    • H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
    • 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
    • H01G4/30—Stacked capacitors

Definitions

  • the invention belongs to the field of power capacitor manufacturing, and relates to a power capacitor and a manufacturing method thereof, and particularly relates to a new scheme for integral electrical connection processing of an internal capacitor element, a component and a core. Background technique
  • Fig. 1 to Fig. 3 show the basic configuration of a conventional power capacitor, including a core 10A assembled of a plurality of capacitive elements 1A as shown in Fig. 3. Referring to Figures 1 and 2, each capacitive element 1A has a length!
  • the capacitive element 1A is formed by overlapping two sets of aluminum foil 2A and two sets of film 3A (accommodating energy storage function), each set of film consisting of 2-3 sheets of insulating medium, each piece of aluminum foil 2A
  • the edge includes a side strip of size A, and the side strips of the two aluminum foils 2A are opposite in direction from the edge of the film 3A in the length L direction, and thus the two edges respectively projecting from the opposite direction of the edge of the film 3A
  • the strip constitutes two electrodes 4A, BP of each capacitive element 1A, and the side strip size A is also the size of the electrode 4A.
  • solder brazing mode is still in use by most manufacturers today, usually using the structure of the connecting piece 5A as shown in Fig. 3.
  • This solder brazing method utilizes a base material whose melting point is lower than that of aluminum foil, copper tape, fuse, etc. Tin-lead solder, brazed at a temperature lower than the melting point of the base metal and higher than the melting point of the tin-lead solder. After heating, the liquid tin-lead solder is wetted, spread and grounded on the surface of the base material. The process flow such as caulking in the gap, the specific connection structure is shown in Fig. 3.
  • the brazing needs to be performed after the capacitor element 1A is assembled into the core 10A, and the electrodes of the capacitor elements 1A are soldered one by one to the connecting piece 5A.
  • the main problem with the solder brazing method is that it is difficult to ensure the quality of the soldering. Since the soldering between the electrode and the connecting piece 5A needs to be heated and completed by manual operation, the heating temperature is controlled by the operator by experience, and if the temperature is too low, the virtual state is generated.
  • the joint piece 5A needs to be tinned before brazing
  • the tin-tin process requires special tin-tin and temperature-controlled equipment, and the price of tin-lead solder is relatively high, resulting in high production costs.
  • the solder brazing mode pollutes the environment and affects the health of employees.
  • the electrical connection between the electrodes of the component is carried out by special clamping members and tools. Since the length of the protruding film of the component electrode must be longer than that of the brazing, the cold mechanical can not be implemented if the electrode size A is less than 15. In the nip process, it is difficult to obtain a desired nip effect when the electrode size A is less than 20 mm, and therefore, it is necessary to increase the size A of the electrode of the aluminum foil, and the cost of the aluminum foil is high. In addition, the investment cost of the clamping and detecting equipment is high, the clamping process is complicated, and the processing efficiency is lower than the solder brazing mode.
  • the cold welding and cold mechanical clamping joint mode is to make the electrical connection between the electrodes of the component by cold welding, and the electrical connection of the core terminal is adopted by the cold mechanical clamping method. Since this welding method requires a certain static pressure on the workpiece, the size of the welding head of the welding equipment cannot be made too small by the strength. Therefore, the aluminum foil electrode size A must be at least 25 mm (1 inch), which is the first.
  • the material cost is increased, and at the same time, the thickness H of the capacitor element is increased to at least 20, and the increase of the thickness H causes the number of parallel connection of the capacitor elements to decrease. When the thickness is H ⁇ 20 mm, the number of parallel connections is 14, which eliminates the production.
  • the operational possibilities of a capacitor containing an internal fuse In addition, the high investment cost of clamping, welding and testing equipment is also a disadvantage of this model.
  • an object of the present invention is to provide a power capacitor and a method of manufacturing the same, which not only effectively optimizes the quality of the electrical connection, improves the production efficiency, but also greatly reduces the manufacturing cost of the product, and It avoids environmental pollution and harm to employees' health, and can well meet the structural requirements of multi-component characteristics of internal fuse capacitors.
  • the present invention adopts the following technical solutions.
  • a power capacitor comprising a main insulation 70 mounted in a housing, a core 10 mounted in the main insulation 70, and at least two extraction ends 71 72 connected to an external circuit
  • the core 10 includes a plurality of mutual Stacked welding Assembly components 13, 14, 15, each of the welding assemblies 13, 14, 15 comprises a plurality of capacitive elements 1, each of which is formed by winding two aluminum foils 2 and two sets of films 3, each of which The two aluminum foils 2 have two electrodes 4 projecting from opposite edges of the film 3, respectively, and each electrode 4 has a size a of 10 to 15 inside each of the welded assemblies 13, 14, 15
  • the electrical connection between the capacitor elements 1 is achieved by the first batch of multi-layer co-welded ultrasonic welding structures 11 , and the welding assemblies 13 , 14 , 15 are realized by the second batch of multi-layer co-welded ultrasonic welding structures 11 .
  • the two soldering assemblies 13, 15 at the upper and lower ends of the core 10 are electrically connected to the terminals 71 or 72, respectively, by a cold mechanical clamping structure
  • the multi-layer co-welded ultrasonic welding structure 11 is a bipolar full-layer common-welded composite structure 111 with a protective sheet 16 or a bipolar full-layer common-welding simple structure without a protective sheet, and the bipolar full layer is common.
  • the arrangement of the solder composite structure 111 or the bipolar full-layer common-welding simple structure is on the adjacent two electrical connection portions 41 and 42 of the adjacent two electrodes 4 of the adjacent two capacitive elements 1.
  • the multi-layer co-welded ultrasonic welding structure 11 is a monopolar full-layer co-welded composite structure 112 with a protective sheet 16 or a monopolar full-layer common-welding simple structure without a protective sheet, and a monopolar full layer
  • the common structure of the common-welded composite structure 112 or the monopolar full-layer common-welding structure is on one of the two electrical connection portions 41 or 42 of the same electrode 4 of the same capacitive element 1.
  • the cold mechanical clamping structure 12 includes a pre-clamp structure and a terminal clip 7, and the pre-clamp structure is established in the two welding assemblies 13, 15 of the upper and lower ends of the core 10.
  • the terminal clip 7 is disposed on the leading end 71 or 72, and the terminal clip 7 is cold mechanically clamped with the front structure.
  • the pre-clamp structure is a multi-layered contact structure formed on the connecting portion 41 or 42 of the electrode (4); or the pre-clamp structure is established on the one described A multilayer co-welded ultrasonic welded structure on the joint 41 or 42 of the electrode (4).
  • the size a of the electrode 4 is preferably 12
  • solder joints 110 of the multi-layered co-welded ultrasonic welding structure 11 have a mesh shape.
  • the multi-layered co-welded ultrasonic welding structure 11 is bent toward the thickness H direction of the capacitive element 1.
  • a method of manufacturing a power capacitor according to the present invention includes the following steps:
  • Step 1 Producing a plurality of capacitive elements 1 of the same specification, wherein each of the capacitive elements 1 is wound from two aluminum foils 2 and two sets of films 3, and two sides of each of the capacitive elements 1 respectively protrude Electrodes 4, each electrode 4 has a size a of 10 mm to 15 mm;
  • Step 2 using an ultrasonic welding device to rotate the electrode 4 of the predetermined number of the plurality of capacitive elements 1 under no pressure
  • Ultrasonic welding is sequentially performed to realize electrical connection between the electrodes 4 of each of the capacitive elements 1, and a plurality of capacitive elements 1 are stacked together to form a plurality of welded assemblies 13, 14, respectively, using ultrasonic welding equipment
  • a first plurality of multi-welded ultrasonic welded structures 11 are formed on each of the welded assemblies to establish a fixed connection between the capacitive elements 1 in the same welded assembly while simultaneously in the same welded assembly Electrical connection between the electrodes 4 of the respective capacitive elements 1;
  • Step 3 After the fixed welding assemblies 13, 14, 15 are fixedly connected, the core 10 is press-fitted according to design requirements;
  • Step 4 ultrasonic welding is performed on the pressed core 10 by using an ultrasonic welding tool.
  • a second plurality of multi-layer, co-welded, ultrasonically welded structures 11 are formed between each of the welded assemblies 13, 14, 15 of the core 10 to achieve between each adjacent stacked solder assembly 13 , 14 , 15 Electrical connections;
  • Step 5 firstly establish a pre-clamp structure on the electrode 4 which is led out at the outermost side of the soldering assemblies 13 and 15 at the upper and lower ends of the core 10, and then respectively use the hand-held mechanical clamping tool to respectively take out the terminals of the capacitor.
  • the terminal clamps 7 on the 71, 72 are clamped to the front structure of the clamp to form a cold mechanical clamping structure 12 at each of the terminals of the capacitor.
  • the ultrasonic welding structure 11 for bending and arranging the ultrasonic multi-layer co-welding, the cold mechanical clamping structure 12, and the step of fixing the core 10 in the casing afterwards are further included.
  • the invention is directed to the current situation that the welding head is large in size and the component is inconvenient to be pressed after being pressed into the core.
  • the plurality of capacitor elements are first used in the desktop ultrasonic welding machine before the core is press-fitted.
  • Cold welding is carried out in a non-pressure state, in particular, ultrasonic welding is used to weld the multi-layer aluminum foil of the same electrode of adjacent components to form a bipolar full-layer ultrasonic common-welding joint structure, and then assembled to form a parallel-section capacitor assembly structure.
  • the electrode protruding dimension of the capacitor element produced by the method of the invention is reduced from 25.4 mm to 12 mm, and the electrode size of each capacitor element can be reduced by 50% to 60%.
  • the thickness is not limited, and the capacitance of the capacitor element can be increased by 6% to 10% under the premise of using the same size series of aluminum foil products, thereby effectively reducing the material cost, simplifying the processing difficulty of the assembly core, and the number of components.
  • the amount is no longer limited, so that the electrical performance, product process and quality control of the product reach a comprehensive optimal state, which significantly improves the overall electrical performance of the power capacitor and the reliability and economy of the product.
  • Fig. 1 is a schematic view showing the outline of the capacitance element 1A of a prior art power capacitor.
  • Figure 2 is a left side view of Figure 1, schematically showing a prior art capacitive element 1A from two aluminum foils 2A and two sets The film 3A is formed by overlapping and winding.
  • FIG 3 is a schematic view showing the outer structure of a core 10A of a power capacitor of the prior art.
  • the electrical connection is soldered by tin-lead solder, and the electrode 4A of the capacitor 1A is soldered to the connecting piece 5A one by one by soldering, and the electrode 4A is connected.
  • a very thick solder layer 6A is formed by a soldering process such as tin-zinc solder, a spreading process, and a tin-lead-filled solder.
  • FIG. 4 is a schematic plan view showing the power capacitor of the present invention.
  • Fig. 5 is a partially enlarged plan view showing the left side of Fig. 4;
  • Figure 6 is a plan view showing the assembly of the soldered components 13, 14, 15 of the capacitor shown in Figure 4.
  • Figure 7 is a left side view of Figure 6.
  • Fig. 8 is a view showing the configuration of the capacitor element 1 of the capacitor shown in Fig. 4.
  • Figure 9 is a cross-sectional view taken along line E-E of Figure 8, and Figure 9 shows the specific structure of the capacitor element 1.
  • Fig. 10 is an enlarged schematic view showing a state in which it is rotated by 90° in the left side view of Fig. 8.
  • Figure 11 is a partially enlarged schematic view of the portion C of Figure 6.
  • Figure 12 is a bottom view of Figure 11 .
  • Figure 13 is a partially enlarged schematic view of D of Figure 4.
  • Figure 14 is a bottom view of Figure 13. detailed description
  • Fig. 4 is a schematic plan view showing the power structure of the power capacitor of the present invention, which shows the outline and internal structure of the capacitor embodiment from an angle.
  • Fig. 5 is a partially enlarged plan view showing the left side of Fig. 4, which shows the outer shape and internal structure of the power capacitor embodiment of the present invention from another angle.
  • Figure 6 is a plan view showing the assembly of the soldered components 13, 14, 15 of the capacitor shown in Figure 4, which have been formed by the first ultrasonic welding process before being assembled into the core 10, respectively.
  • Figure 7 is a left side view of Figure 6.
  • Fig. 8 is a view showing the configuration of the capacitor element 1 of the capacitor shown in Fig. 4.
  • the size A of the electrode 4A is larger than 20 and the electrode 4 shown in Fig.
  • FIG. 8 is smaller than the large-size electrode 4A shown in Fig. 1.
  • the size electrode has a size a of 10 to 15.
  • FIG. 9 is a cross-sectional view taken along line E-E of FIG. 8.
  • FIG. 9 shows a specific structure in which the capacitor element 1 is formed by overlapping two aluminum foils 2 and two sets of film 3, Each of the films 3 shown in the drawing includes two films, and only the case of winding one layer is shown, and the actual number of wound layers is a plurality of layers. For ease of illustration The structure of the capacitor element 1, the distance between the wound aluminum foil 2 and the film 3 shown in Fig. 9, the thickness of the aluminum foil 2 and the film 3 are enlarged, and the layers of the wound aluminum foil 2 A and the film 3 A are wound.
  • Fig. 10 is an enlarged schematic view showing a state in which it is rotated by 90° in the left side view of Fig. 8.
  • Fig. 11 is a partially enlarged plan view showing the C of Fig. 6, and Fig. 11 is a view showing the outer configuration of the bipolar full-layer common-welded composite structure 111 with the protective sheet 16 of the multilayered welded ultrasonic welding structure 11.
  • Figure 12 is a bottom plan view of Figure 11 showing the outline of the bipolar full-surface common-welded composite structure 111 from another angle, and the shape of the solder joints 110 of the ultrasonic-welded structure 11 is also shown in Figure 12 .
  • Figure 13 is a partially enlarged schematic view of the portion D of Figure 4, and Figure 13 shows the outline structure of the cold-clamping structure 12.
  • Figure 14 is a bottom plan view of Figure 13 showing the outer configuration of the cold-clamping structure 12 from another angle.
  • the power capacitor of the present invention includes a main insulation 70, a core 10 mounted in the main insulation 70, and two terminals electrically connected from the electrical connection portions of the uppermost and lowermost capacitive elements of the core 10, respectively.
  • 71, 72 see Figures 6, 7
  • the two terminals 71, 72 are respectively two poles of the power capacitor and the external circuit are electrically connected, and the outer end of the terminal 71 or 72 is finally connected with the capacitor cap (not shown)
  • the insulators (not shown) are connected to form two external electrodes for accessing the external circuit of the power grid (Fig. 4), and the inner ends of the terminals 71 or 72 are connected to a terminal clip 7 (Fig. 14).
  • the terminal clip 7 is disposed at the inner end of the terminal 71 or 72.
  • the core 10 includes three welded assemblies 13, 14 and 15 vertically stacked in the main insulation 70.
  • the solder assembly 15 is disposed on the lower layer, and the solder assembly 14 is disposed.
  • the solder assembly 13 is disposed on the upper layer.
  • the upper welding assembly 13 and the lower welding assembly 15 are electrically connected to the terminal 7 of the two terminals 71, 72, respectively, and they are also electrically connected to the intermediate welding assembly 14, respectively, and these electrical connections are connected in series or Parallel connection is selectable according to design requirements.
  • the number of soldering components may be two or more. In 3.
  • the intermediate welding assembly 14 is not provided; if the number of welding assemblies required by the design is four or more, the intermediate welding assembly 14 is set to 2 And above.
  • the upper soldering assembly 13 and the lower soldering assembly 15 are indispensable.
  • the core can be composed of different components and different series and parallel.
  • the series or parallel connection between the welded components can also be determined according to the specific design requirements, but it can be passed in series or in parallel.
  • the present invention achieves an electrical connection between two adjacent soldering assemblies without the need to add conductive features such as tabs.
  • the length L of the capacitor element has also been serialized, because the inherent width of the aluminum foil and the film product is not only for ensuring the capacitance element. Good electrical performance, and avoids wasting expensive aluminum foil and film materials, eliminating the need for complex cutting Preface.
  • the length L is equal to the film width B plus twice the electrode size A, but the electrode size A cannot contribute to the capacitance.
  • the present invention reduces the electrode size A so that the capacitor element 1A increases the capacitance while maintaining the length L, and the test proves that this is a reduction in production. Cost and an effective means of increasing the added value of the product.
  • each of the soldering assemblies 13, 14 or 15 includes a plurality of capacitive elements 1 of different numbers, each of which is formed by winding two aluminum foils 2 and two sets of films 3, wherein The aluminum foil 2 is a conductive layer of the capacitor element 1 and functions as an electrode, and the film 3 is an insulating dielectric layer of the capacitor element 1. As shown in FIGS. 6 and 7, each of the soldering assemblies 13, 14 or 15 includes a plurality of capacitive elements 1 of different numbers, each of which is formed by winding two aluminum foils 2 and two sets of films 3, wherein The aluminum foil 2 is a conductive layer of the capacitor element 1 and functions as an electrode, and the film 3 is an insulating dielectric layer of the capacitor element 1. As shown in FIGS.
  • the two aluminum foils 2 of the capacitive element 1 respectively have a narrow side strip extending from the opposite direction to the edge of the film 3, the side strip constituting the electrode 4 of the capacitive element 1, when After the aluminum foil 2 and the two sets of the film 3 are wound several times, the side strips are wound by the same number of turns, so that the electrode 4 composed of a plurality of turns of the side strips is actually a plurality of layers of the aluminum foil 2.
  • the side strips are formed, and there is no insulating medium between the adjacent two side strips (Fig. 10).
  • the shape of the wound capacitor element 1 after being flattened is as shown in FIG. 10.
  • the same electrode 4 of the capacitor element 1 is divided by the center layer 30 of the film 3 into two electrical connection portions 41 and 42 of the same size.
  • the electrical connection portions 41 42 are respectively stacked by the plurality of side strips constituting the same electrode 4, and the number of side strip layers of each of the electrical connection portions 41 or 42 is equal to the number of winding turns of the wound capacitor element 1 for providing Electrical connection between the layers of the same capacitive element 1 , the electrical connection with other capacitive elements 1 or with the terminal clamp 7 .
  • the size a of the electrode 4 is the smallest among the current cold welding and/or cold mechanical clamping electrical connections, and the size a is preferably Taking 12mm as an example, the size a of the electrode 4 of the present invention is reduced by 52% compared with the electrode size A of the cold soldering method of the prior art, and the size a is preferably 12 element length L is 350.
  • the capacitor element of the present invention is taken as an example. 6% ⁇ The electric capacity of the first embodiment of the cold mechanical clamping method increased by 8.6%
  • the minimization of the size a of the electrode 4 is achieved by a new method of manufacturing the power capacitor of the present invention described below and a new structure of electrical connection.
  • the respective capacitive elements 1 constituting each of the soldering assemblies 13, 14, or 15 are electrically connected first through the first plurality of multilayered ultrasonically welded structures 11 and then the soldered components are assembled. Electrical connections are made between 13, 14, and 15 by a second plurality of multi-layer, co-welded, ultrasonically welded structures 11.
  • the first batch referred to herein refers to a multilayer co-welded ultrasonic welding structure 11 formed on a process before being press-fitted into the core 10, and the second batch means formed on a process after press-fitting the core 10.
  • the multi-layer co-welded ultrasonic welding structure 11 The multi-layer co-welded ultrasonic welding structure 11 .
  • the first batch of multi-layer co-welded ultrasonic welding structure 11 and the second batch of multi-layer co-welded ultrasonic welding structure 11 have no structural difference, but Since the process, the object to be processed, and the equipment used are different, there is a difference in connection quality, welding efficiency, and the like.
  • the first batch of multi-layer co-welded ultrasonic welding structures 1 is realized on ultrasonic welding equipment. The advantage is that it can make full use of the quality control environment and automatic production conditions provided by the equipment to further improve the level and thickness of welding quality. Increase the level of automated production.
  • the second batch of multi-layer co-welded ultrasonic welding structure 11 is realized on the ultrasonic welding tool, and has the advantages of being able to complete the welding which cannot be realized by the existing cold welding machine equipment, but the shortage is that the control of the welding quality depends on the person. Affect production efficiency.
  • the first batch of multi-layer co-welding is not only a step of realizing the ultrasonic welding structure 11, but also a part in which each of the welding components 13, 14, or 15 is composed of a plurality of capacitive elements 1, through which the pre-pressing is performed.
  • the manufacturing method of welding and the structural form of forming the welded assembly the majority of the electrical connection is completed in advance on the ultrasonic welding machine capable of achieving multi-layer common welding, which can effectively overcome the instability of the existing welding quality and directly restrict the product to the high-end development. And the problem of limiting the economic performance of the product.
  • the advantages are as follows: cold welding, no damage to the insulating medium; welding material does not melt, does not fragile metal characteristics; good solder joints, minimal connection resistance, additional electrical losses are almost zero; requirements for welding metal surfaces Low, oxidation or electroplating does not affect the welding; the welding cycle is short, no flux, flux and solder are needed; welding has no high temperature heat source, no pollution, environmental protection and safety; especially simplifying the processing difficulty of assembling the core, and the capacitance
  • the number of components is not limited, and it can also meet the production needs of internal fuse power capacitors.
  • Multi-layer co-welding refers to the common welding of the multi-layered side strips of the aluminum foil, that is, the electrodes 4, and the pressure between the layers of the layers. In this case, it is also possible to maintain a tight, strong connection and does not separate the welded structure. Therefore, one of the basic functions of the multilayer co-weld structure feature is to ensure good electrical connection performance and to achieve a very small (nearly zero) connection resistance.
  • the second basic function of the multi-layer co-welded structure feature is to ensure good mechanical connection performance, so that the plurality of capacitive elements 1 in the same welding assembly 13, 14 or 15 are not loose, not separated, and the first batch of welding quality It will not be affected by subsequent processes such as press-molding the core.
  • the multilayer co-welding of the present invention comprises two specific forms, one being a full-layer co-weld form and the other being a non-full-layer co-weld form.
  • "Full layer co-welding” means a form in which all the side strips of one electrical connection portion 41 or 42 of the electrode 4 are welded together, and "non-full-layer common soldering" refers to an electrical connection portion 41 or 42 of the electrode 4.
  • the side strips are welded together in a form.
  • full-layer co-welding is a preferred method, because all the side strips of the electrode 4 participate in the current carrying, so that the conductivity of the electrode 4 can be maximized, and the balanced current carrying of the side strips reduces the conductor temperature. Rise.
  • unwelded edge strips produced in the absence of a full-surface co-weld may have some disadvantages, such as difficulties in subsequent finishing.
  • the ultrasonic welding structure 11 described above may include two specific structural forms, one of which is a composite structural form and the other of which is a simple structural form.
  • the composite structure includes a protective sheet 16 placed between the terminal clip 7 and the capacitive element 1 to function as a protective element electrode, and the protective sheet 16 is coated on the electrode 4.
  • the outer surface of all the side strips of the electrical connection portion 41 or 42 is ultrasonically welded to form a full-layer common-welded composite structure with the protective sheet 16, wherein the protective sheet 16 is welded to all the side strips, and the composite structure can be further strengthened.
  • the joint strength of the ultrasonic welding structure 11 can also protect the ultrasonic welding structure 11 from being damaged. If the protective sheet 16 is not provided, a simple structural form of full-layer co-welding is formed.
  • the ultrasonic welding structure 11 can also be divided into two basic forms, one of which is in the form of a bipolar, that is, the ultrasonic welding structure 11 has the function of electrical connection between two adjacent electrodes 4, and the other The species is in the form of a monopole that does not have the function of electrical connection between the two electrodes 4.
  • the multi-layer co-welded ultrasonic welding structure 11 of the present invention can have various specific forms, wherein the most useful forms of the multilayer co-welded ultrasonic welding structure 11 are the following four types: one is the double pole with the protective sheet 16
  • the layer is a common-welded composite structure 111; the second is a monopolar full-layer common-welded composite structure 112 with a protective sheet 16; the third is a simple structure of a bipolar full-layer common-welding without a protective sheet 16; and the fourth is a single sheet without a protective sheet 16.
  • Very full layer common welding simple structure The specific applications of these four forms are as follows:
  • the above-described bipolar full-layer common-welded composite structure 111 with a protective sheet 16 has a function of electrically connecting two adjacent electrodes 4, and the protective sheet 16 is coated on the adjacent two electrodes 4.
  • the outer surfaces of all the side strips of the electrical connecting portions 41 and 42 are ultrasonically welded, and the protective sheet 16 is welded to all the side strips of the two electrical connecting portions 41 and 42.
  • the structure 111 is in the soldering assembly 13 and 14 Or 15 is the most used on the internal electrical connections (see Figures 6, 7).
  • the third non-protective sheet bipolar full-layer co-welding simple structure (not shown) is different from the first bipolar full-layer co-welded composite structure 111 with the protective sheet 16 only in that it is not With the protective sheet 16, the third non-protective sheet bipolar full-layer common welding simple structure can also meet the better use requirements when the connection strength and protection requirements are not required to be high. As shown in FIGS. 6 and 7, the above-described single-pole full-layer common-welded composite structure 112 with the protective sheet 16 does not have the function of electrical connection between two adjacent electrodes 4, and the protective sheet 16 is coated on two of the electrodes 4.
  • the outer surface of all the side strips of one of the electrical connecting portions 41 or 42 is ultrasonically welded, and the protective sheet 16 is welded to all the side strips of the one electrical connecting portion 41 or 42.
  • the cold mechanical clamping structure 12 is used in conjunction with the forming process. To facilitate subsequent mounting to further improve product performance, it can also be used for electrical connections 41 or 42 that do not have electrical connection requirements.
  • the fourth non-protective sheet-free single-pole full-layer common-welding simple structure (not shown) is different from the single-pole full-layer common-welded composite structure 112 with a protective sheet only in that it has no protective sheet 16 It is more suitable for electrical connections 41 or 42 that do not have electrical connection requirements for subsequent finishing.
  • the cold-mechanical clamping structure 12 is electrically connected between the upper welding assembly 13 or the lower welding assembly 15 and the leading end 71 or 72 of the core 10, that is, the upper layer
  • the welding assembly 13 and the lead end 71 are connected by a cold mechanical clamping structure 12, and the lower welding assembly 15 and the leading end 72 are connected by a cold mechanical clamping structure 12.
  • the cold clip structure 12 described herein includes a clip 7 disposed on the lead end 71 or 72 and disposed at the electrode
  • the pre-clamp structure on the 4 (not shown), the pre-clamp structure is established at the upper and lower ends of the core 10, and the connection of the electrode 4 serving as the electrical connection is taken out.
  • the pre-clamp structure comprises two forms, one of which is a multi-layered contact structure formed on the connecting portion 41 or 42 of the electrode 4, which is in close contact with each other under the action of external pressure, but
  • the non-welding chain has the advantages of simple structure; the other form is a multi-layer co-welded ultrasonic welding structure built on the connecting portion 41 or 42 of the electrode 4, and its specific form is a monopolar full layer.
  • the ultrasonic welding structure 11 of the first-and second-stage multi-layer co-welding is identical in structure, but the connection parts are different, and is used for realizing
  • An ideal structural solution of the cold mechanical clamping structure 12 is a multi-layer co-welded cold clamping structure, that is, a multi-layer co-welded pre-clamp structure, preferably a monopolar full layer with a protective sheet 16
  • the welding composite structure 112, the terminal clamp 7 bears the capacitor electrode extraction function, and the cold clamp is used between the terminal clamp 7 and the single-pole full-layer common-welded composite structure 112 of the above-mentioned electrically connected external electrode, which can further improve the electrical conductivity or the connection strength.
  • the cold mechanical clamping described here is connected by a mechanical clamping force, and the clamping clamp 7 may be provided with a device for providing a clamping force, or a clip for providing a clamping force (not shown) may be additionally provided.
  • Another embodiment of the multi-layer co-welded pre-clamp structure is a form of cold mechanical clamping between the simple structure of the monopolar full-layer co-welding without the protective sheet 16 and the terminal clip 7, this form of connection
  • the strength is not as good as the single-pole full-layer co-welded composite structure 112 with the protective sheet 16, but it also satisfies the basic connection function requirements.
  • the alternative to the multi-layer co-welded pre-clamp structure also includes a pure cold mechanical clamping of non-multi-layer co-welding, ie a multi-layered contact structure, in which case the electrode of the capacitive element 1
  • a pure cold mechanical clamping of non-multi-layer co-welding ie a multi-layered contact structure, in which case the electrode of the capacitive element 1
  • the electrode of the capacitive element 1 There is no common solder joint relationship between the side strips of the electrical connection portion 41 or 42 of 4, so if the clamping force provided by the clip is removed, separation may occur between the side strips.
  • Even in the case of applying a clamping force there is a large contact between the side strips of the electrical connection portion 41 or 42 clamped by the clamp joint in the form of a non-multilayer co-welded pure cold mechanical clamp. Resistance, which causes temperature rise and loss of electricity.
  • the shape of the solder joint 110 of the multilayer co-welded ultrasonic welding structure 11 of the present invention is a mesh-shaped rectangle, which is a preferred embodiment, which can be made with a smaller size a of the electrode 4.
  • the area of the solder joint 110 is maximized, and the larger the area of the solder joint 110, the stronger the conductive capability of the solder structure 11.
  • the multi-layered co-welded ultrasonic welding structure 11 of the present invention can be bent toward the thickness H direction of the capacitor element 1. Obviously, such a curved structure can further reduce the length dimension of the core 10, which is advantageous for improving the core 10 Insulation isolation from main insulation 70. Multi-layer co-welded ultrasonic of the present invention compared to existing cold or cold mechanical clamping methods The wave soldering structure 11 can not only achieve the bending described, but also realize the bending process very conveniently.
  • Step 1 Producing a plurality of capacitor elements 1 of the same specification, wherein each capacitor element 1 consists of two aluminum foils 2 and two groups.
  • the film 3 is wound, and two electrodes 4 projecting from both side edges of each of the capacitor elements 1 each have a size a of 10 mm to 15 mm; (see Figs. 8 to 10);
  • Step 2 ultrasonically welding the electrodes 4 of the predetermined number of the plurality of capacitive elements 1 in a non-pressure state by ultrasonic welding equipment to realize electrical connection between the electrodes 4 of each of the capacitive elements 1, and multiple The capacitor elements 1 are stacked together to form a plurality of soldering assemblies 13, 14, respectively.
  • the first batch of multi-layered co-welded ultrasonic welding structures 11 are formed on each of the soldering assemblies by ultrasonic welding equipment, so as to be A fixed connection relationship is established between the respective capacitive elements 1 in one soldering assembly, and an electrical connection is made between the electrodes 4 of the respective capacitive elements 1 in the same soldering assembly; (see Figures 6 to 7)
  • Step 3 After the fixed welding components 13, 14, 15 are fixedly connected, press the core 10 according to the design requirements; (see Figure 4)
  • Step 4 Ultrasonic welding of the press-fitted core 10 by means of an ultrasonic welding tool, between the welding assemblies 13, 14, 15 constituting the core 10, according to the design of the series-parallel electrical connection between the welded components It is required to establish a second batch of multi-layer co-welded ultrasonic welding structure 11 to achieve electrical connection between each adjacent stacked welding assembly 13, 14, 15 to meet the required welding assembly of the core 10.
  • Step 5 Firstly, the most of the welding assemblies 13, 15 at the upper and lower ends of the core 10 The electrode 4 led out from the outside establishes a pre-clamp structure, and then the hand-held mechanical clamping tool respectively clamps the terminal clip 7 on the terminals 71, 72 of the capacitor to the front structure of the clip, the clip including the clip 7 and the multi-layer co-welded ultrasonic welding structure 11 between the clamping connection, forming a cold mechanical clamping structure 12 of each of the terminals of the capacitor, to meet the overall capacitance function of the core 10 (see Figures 4, 6, 7, 13 14).
  • the above step 5 further includes bending and arranging the ultrasonic multi-welded ultrasonic welding structure 11 and the cold welded structure 12, and the bent and finished core 10 is fixedly mounted in the main insulation 70 (see FIG. 5), and Subsequent steps of mounting the main insulation 70 and the core 10 in a casing (not shown).
  • the ultrasonic welding device may be a general-purpose ultrasonic welding machine or a pipeline composed mainly of a general-purpose ultrasonic welding machine.
  • the ultrasonic welding tool can employ an ultrasonic welding tool that is easy to realize ultrasonic welding after being assembled into a core, and.
  • the hand held mechanical clamping tool is a well known tool that matches the cold mechanical clamping structure 12.

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Abstract

一种电力电容器及其制造方法，包括安装在主绝缘内的芯子和至少 2 个与外部电路连接的引出端，所述的芯子包括多个相互叠装在一起的焊装组件，每个焊装组件包括多个电容元件，每个电容元件由两张铝箔和两组薄膜卷绕而成，每个电容元件的两张铝箔上具有分别从薄膜的边缘相反方向伸出的两个电极，并且每个电极的尺寸 a 为 10mm 至 15mm。每个焊装组件内部的各电容元件之间通过第一批的多层共焊的超声波焊接结构实现电气连接，各焊装组件之间通过第二批的多层共焊的超声波焊接结构实现电气连接，位于芯子的上、下端的两个焊装组件分别与引出端之间通过多层共焊的冷机械夹接结构实现电气连接。采用本发明可使电极尺寸减小 50%至 60%，可增加电容元件的电容量 6%至 10%。

Description

电力电容器及其制造方法
技术领域
本发明属于电力电容器制造领域， 涉及一种电力电容器及其制造方法， 具体涉及其内 部电容元件、 组件、 芯子的整体电气连接加工新方案。 背景技术
电力电容器广泛应用于电力系统， 在高电压试验、 激光技术、 高能物理、 工农业生产 及日常生活中也广为应用。 图 1至图 3给出了现有电力电容器的基本构造， 包括如图 3所 示的由多个电容元件 1A组装而成的芯子 10A。参见图 1和 2， 每个电容元件 1A具有长度！^、 宽度 W和厚度 H， 电容元件 1A由两张铝箔 2A与两组薄膜 3A (承担储能功能） 重叠卷绕而 成， 每组薄膜由 2-3张绝缘介质组成， 每张铝箔 2A的边缘包括一个尺寸为 A的边条， 且两 张铝箔 2A的边条沿长度 L方向从薄膜 3A的边缘伸出的方向相反， 于是， 这两个分别从薄 膜 3A的边缘相反方向伸出的边条构成了每个电容元件 1A的两个电极 4A， BP , 边条尺寸 A 也就是电极 4A的尺寸。 在制造中， 在各个电容元件 1A的电极 4A之间、 相关的电容元件的 引出端与芯子 10A的引出端之间， 均需采用电气连接。 自全膜电容器问世后的近 30年来， 在世界范围内的薄膜电容器制造行业中， 电力电容器的电气连接模式有三种： 一是焊料钎 焊模式 （最老模式） ， 二是冷机械夹接模式， 三是冷焊接与冷机械夹接相结合模式。 下面 简要归纳三种现有模式各自的特点和局限性：
焊料钎焊模式目前大多数生产企业还在沿用， 通常是采用如图 3所示的连接片 5A的结 构， 这种焊料钎焊方式是利用熔点低于铝箔、 铜带、 熔丝等母材的锡铅焊料， 在低于母材 熔点并高于锡铅焊料熔点的温度下进行钎焊焊接， 需通过加温后， 再将液态的锡铅焊料在 母材表面润湿、 铺展和在母材间隙中填缝等工艺流程， 其具体连接结构如图 3 所示， 钎焊 需在电容元件 1A组装成芯子 10A后才能进行， 各电容元件 1A的电极需通过钎焊逐个焊接 到连接片 5A上， 电极与连接片 5A之间需铺展、 填充很大的锡铅焊料层 6A， 其电气连接的 工序需在组装成芯子后进行。 焊料钎焊方式存在的主要问题是难以保证焊接质量， 由于电 极与连接片 5A之间的钎焊需加热并由人工操作完成， 加热温度由操作人员凭经验控制， 如 果温度太低， 则产生虚焊、 增加接触电阻、 影响产品寿命； 而如果温度太高， 则损伤绝缘 介质， 造成膜的老化和粘连， 影响产品的电气性能。 由于钎焊前需对连接片 5A进行搪锡处 理， 而搪锡工序需采用专用的搪锡和温控设备， 而且锡铅焊料价格较贵， 导致生产成本高。 此外， 焊料钎焊模式污染环境， 影响员工身体健康。
冷机械夹接模式是采用特殊的夹持件及工具进行元件的电极间的电气连接， 由于元件 电极伸出薄膜的长度须比钎焊加长， 在电极尺寸 A小于 15 的情况下无法实施冷机械夹接 工艺， 在电极尺寸 A小于 20mm的情况下难以获得理想的夹接效果， 因此， 需要加大铝箔的 电极的尺寸 A， 而铝箔成本较高。 此外， 夹接及检测设备的投资费用较高， 夹接工艺操作复 杂， 加工效率比焊料钎焊模式低。
冷焊接与冷机械夹接结合模式是采用冷焊接方式进行元件的电极之间的电气连接， 同 时采用冷机械夹接方式进行芯子引出端的电气连接。 由于此焊接方式需要对工件施以一定 的静压力， 因此焊接设备的焊头尺寸受强度所限不能做得太小， 为此须将铝箔电极尺寸 A 至少加长到 25mm ( 1英寸） ， 这首先提高了材料成本， 同时还需将电容元件的厚度 H至少 加大到 20 而厚度 H的加大造成电容元件并联数量的减少， 当厚度 H^ 20mm 时， 使并联 数 14， 这就排除了生产含有内熔丝的电容器的操作可能性。 此外， 夹接、 焊接及检测设 备的投资费用较高也是该模式存在的缺点。
上述现有的三种电气连接模式由于需加大电极尺寸 A，而且电气连接的工序被全部限制 在组装成芯子之后， 而组装成芯子后的电气连接只能采用手工连接， 不仅电气连接的质量 尚不理想， 并且生产效率低、 成本较高。 然而由于电气连接对于电力电容器的电气性能和 质量稳定性具有十分敏感的影响， 同时又牵涉到复杂的加工工艺， 因此， 上述电力电容器 的制造方法一直沿用到现在， 特别是电容器内部的电容元件的电气连接结构方面的进步不 大， 这与随着相关材料的进步导致电容器的迅速发展的趋势不符。 发明内容
为了突破上述现有技术的发展瓶颈， 本发明的目的在于提供了一种电力电容器及其制 造方法， 不仅有效优化了电气连接的质量， 提高了生产效率， 可大幅度降低产品的制造成 本， 而且避免了对环境的污染和对员工健康的危害， 还能很好地满足内熔丝电容器多元件 特点的结构要求。
为实现上述目的， 本发明采用了如下技术方案。
一种电力电容器， 包括安装在壳体内的主绝缘 70、 安装在主绝缘 70内的芯子 10和至 少 2个与外部电路连接的引出端 71 72， 其中所述的芯子 10包括多个相互叠装在一起的焊 装组件 13、 14、 15， 每个焊装组件 13、 14、 15包括多个电容元件 1， 每个电容元件 1由两 张铝箔 2和两组薄膜 3卷绕而成， 每个电容元件 1的两张铝箔 2上具有分别从薄膜 3的边 缘相反方向伸出的两个电极 4， 并且每个电极 4的尺寸 a为 10 至 15 所述的每个焊装 组件 13、 14、 15内部的各电容元件 1之间通过第一批的多层共焊的超声波焊接结构 11实 现电气连接， 各焊装组件 13、 14、 15之间通过第二批的多层共焊的超声波焊接结构 11实 现电气连接， 位于所述的芯子 10的上、 下端的两个焊装组件 13、 15分别与引出端 71或 72 之间通过冷机械夹接结构 12实现电气连接。
优选的，所述的多层共焊的超声波焊接结构 11为带保护片 16的双极满层共焊复合结构 111或不带保护片的双极满层共焊简单结构，双极满层共焊复合结构 111或双极满层共焊简 单结构的设置部位在相邻两个电容元件 1的相邻两个电极 4的相邻两个电气连接部 41和 42 上。
优选的，所述的多层共焊的超声波焊接结构 11为带保护片 16的单极满层共焊复合结构 112或为不带保护片的单极满层共焊简单结构，单极满层共焊复合结构 112或单极满层共焊 简单结构的设置部位在同一个电容元件 1的同一个电极 4的两个电气连接部 41或 42中的 一个上。
优选的， 所述的冷机械夹接结构 12包括一个夹前结构和接线夹 7， 夹前结构建立在所 述的芯子 10的上、 下端的两个焊装组件 13、 15中的用作引出电气连接的那个电极 (4)的连 接部 41、 42上， 所述的接线夹 7设置在引出端 71或 72上， 接线夹 7与所述的夹前结构之 间采用冷机械夹接。
进一步的， 所述的夹前结构为建立在所述的那个电极 (4)的连接部 41或 42上的多层紧 贴的接触结构； 或者所述的夹前结构为建立在所述的那个电极 (4)的连接部 41或 42上的多 层共焊的超声波焊接结构。 优选的， 所述的电极 4的尺寸 a优选为 12
优选的， 所述的多层共焊的超声波焊接结构 11的焊点 110的形状为网状长方形。
优选的， 所述的多层共焊的超声波焊接结构 11朝电容元件 1的厚度 H方向弯曲。
根据本发明的一种电力电容器的制造方法， 包括以下步骤：
步骤一： 制作多个规格相同的电容元件 1， 其中每个电容元件 1由两张铝箔 2和两组薄 膜 3， 卷绕而成， 并且每个电容元件 1的两侧边缘分别伸出的两个电极 4， 每个电极 4的尺 寸 a均为 10mm至 15mm;
步骤二：采用超声波焊接设备将预定数量的多个电容元件 1的电极 4在无压力的状态下 依次进行超声波焊接， 以实现每个电容元件 1 的电极 4之间的电气连接， 并且将多个电容 元件 1叠装在一起， 分别形成多个焊装组件 13、 14、 15， 采用超声波焊接设备在每个焊装 组件上建立第一批的多层共焊的超声波焊接结构 11， 以便在同一个焊装组件内的各电容元 件 1之间建立起固定连接关系， 同时在同一个焊装组件内的各电容元件 1的电极 4之间实 现电气连接；
步骤三:将各焊装组件 13、 14、 15之间固定连接之后， 按照设计要求压装成芯子 10; 步骤四：采用超声波焊接工具对压装好的芯子 10进行超声焊接， 在构成芯子 10的各焊 装组件 13、 14、 15之间建立第二批的多层共焊的超声波焊接结构 11， 以实现每个相邻叠装 的焊装组件 13、 14、 15之间的电气连接；
步骤五：先分别在处于芯子 10的上、 下两端的焊装组件 13、 15中的最外侧引出的那个 电极 4建立夹前结构， 然后用手持式机械夹接工具分别将电容器的引出端 71、 72上的接线 夹 7与夹前结构进行夹接， 形成电容器的各引出端的冷机械夹接结构 12。
进一步的， 步骤五中还进一步包括弯曲、 整理超声波多层共焊的超声波焊接结构 11、 冷机械夹接结构 12， 以及在此之后的将芯子 10固定安装在壳体内的步骤。
本发明针对焊头尺寸大、 元件压装成芯子后操作不便的现状， 通过采用先焊接后压装 的工艺方法， 在芯子压装前， 先将多个电容元件用台式超声波焊接机在无压力状态下依次 进行冷焊接， 特别是采用超声波焊接工艺， 将相邻元件的同一电极的多层铝箔焊接在一起 而形成双极满层超声共焊连接结构， 然后组装形成并联段电容组件结构， 接着将多个并联 段电容组件结构按设计要求叠放并压装成芯子， 再用超声波焊接机进行串联连接， 最后进 行引出线的冷机械夹接。 经试验证明， 采用本发明的方法生产出的电容器的电容元件的电 极伸出的尺寸由 25. 4mm降低到 12mm, 可使每个电容元件的电极尺寸减小 50%至 60%， 电容 元件的厚度不受限制， 并且在使用相同尺寸系列的铝箔商品的前提下， 可增加电容元件的 电容量 6%至 10%， 有效降低了材料成本， 简化了组装件芯子的加工难度， 而且元件数量的 多少不再受到限制， 使得产品的电气性能、 产品工艺、 质量控制达到综合最优状态， 显著 提高了电力电容器的整体电气性能及产品的可靠性和经济性。 附图说明
图 1是现有技术的电力电容器的电容元件 1A的外形结构示意图。
图 2是图 1的左侧视图， 示意性示出了现有技术的电容元件 1A由两张铝箔 2A与两组 薄膜 3A重叠卷绕而成的结构。
图 3是现有技术的电力电容器的芯子 10A的外形结构示意图， 其电气连接采用锡铅焊 料钎焊方式， 电容元件 1A的电极 4A通过钎焊逐个焊接到连接片 5A上， 电极 4A与连接片 5A 之间通过搪锡锌焊料、 铺展工序和填充锡铅焊料等焊接工序， 建立起很大很厚的焊料层 6A
图 4是本发明的电力电容器的平面结构示意图。
图 5是图 4的左侧视的局部放大示意图。
图 6是图 4所示的电容器的经焊装组件 13、 14、 15组装的平面结构示意图。
图 7是图 6的左侧视图。
图 8是图 4所示的电容器的电容元件 1的结构示意图。
图 9是图 8的 E— E剖视图， 图 9中示出了电容元件 1的具体结构
图 10是在图 8的左侧视图下旋转 90° 后的放大示意图。
图 11是图 6的 C局部放大示意图。
图 12是图 11的仰视图。
图 13是图 4的 D局部放大示意图。
图 14是图 13的仰视图。 具体实施方式
以下结合附图 4至 14给出的实施例，进一步说明本发明的电力电容器的具体实施方式。 本发明的电力电容器不限于以下实施例的描述。
附图中， 图 4 是本发明的电力电容器的平面结构示意图， 它从一个角度示出了该电容 器实施例的外形及内部结构。 图 5是图 4的左侧视的局部放大示意图， 它从另一个角度示 出了本发明的电力电容器实施例的外形及内部结构。 图 6是图 4所示的电容器的经焊装组 件 13、 14、 15组装的平面结构示意图， 它们分别在组装成芯子 10前已经过第一批超声波 焊接工序成形。 图 7是图 6的左侧视图。 图 8是图 4所示的电容器的电容元件 1的结构示 意图， 与图 1中所示的大尺寸电极 4 A相比， 电极 4A的尺寸 A大于 20 而图 8中所示的 电极 4为小尺寸电极， 其尺寸 a为 10 至 15 图 9是图 8的 E— E剖视图， 图 9中示出 了电容元件 1 由两张铝箔 2与两组薄膜 3重叠卷绕而成的的具体结构， 图中所示的每组薄 膜 3 包括两张薄膜， 图中仅示出了卷绕一层的情况， 实际卷绕层数为多层。 为了便于示出 电容元件 1的结构， 图 9中所示的卷绕的铝箔 2与薄膜 3之间的距离、 铝箔 2和薄膜 3的 厚度被放大了， 其中卷绕后的铝箔 2 A与薄膜 3 A的层数为示意性的 1组， 实际层数应根 据设计需要确定。图 10是在图 8的左侧视图下旋转 90° 后的放大示意图。图 11是图 6的 C 局部放大示意图， 图 11中示出了多层共焊的超声波焊接结构 11的带保护片 16的双极满层 共焊复合结构 111 的外形结构。 图 12是图 11的仰视图， 它从另一个角度示出了双极满层 共焊复合结构 111的外形结构， 图 12中还示出了超声波焊接结构 11的焊点 110的形状。 图 13是图 4的 D局部放大示意图， 图 13中示出了冷夹接结构 12的外形结构。 图 14是图 13的仰视图， 它从另一个角度示出了冷夹接结构 12的外形结构。
参见图 4，本发明的电力电容器包括主绝缘 70、安装在主绝缘 70内的芯子 10以及分别 从芯子 10的最上层和最下层的电容元件的电气联接部电气连接的 2个引出端 71、 72 (参见 图 6、 7 ) ， 两个引出端 71、 72 分别为电力电容器与外部电路电气连接的两个极， 引出端 71或 72的外端最终与电容器顶盖 （图中未示出） 上的绝缘子 （图中未示出） 相连接， 形成 两个外接电极， 供接入电力网的外部电路 （图 4) ， 引出端 71或 72的内端与一个接线夹 7 连接 （图 14 ) ， 或者说， 接线夹 7设置在引出端 71或 72的内端。 如图 4所示的实施例中， 所述的芯子 10包括 3个纵向叠装在主绝缘 70内的焊装组件 13、 14和 15， 焊装组件 15布 设在下层， 焊装组件 14布设在中层， 焊装组件 13布设在上层。 上层的焊装组件 13和下层 的焊装组件 15分别与 2个引出端 71、 72的接线夹 7电气连接， 同时它们还分别与中层的 焊装组件 14电气连接， 而这些电气连接采用串联或并联是根据设计要求可以选择的， 例如 图 4给出的实施例的 3个焊装组件 13、 14和 15之间的电气连接采用串联连接， 不过， 焊 装组件的数量可以是 2个或多于 3个。 例如， 如果设计要求的焊装组件的数量为 2个， 则 不设中层的焊装组件 14; 如果设计要求的焊装组件的数量为 4个及以上， 则中层的焊装组 件 14设为 2个及以上。 由此可见， 不管焊装组件的数量设定为几个， 上层的焊装组件 13 和下层的焊装组件 15是必不可缺的。 根据电容器的参数要求， 芯子可由不同的元件和不同 的串并联组合而成， 焊装组件之间的串联或并联形式也可以根据具体设计要求而定， 但不 管是串联还是并联， 都可以通过本发明实现相邻两个焊装组件之间的电气连接， 且无需增 加连接片之类的导电零件。
随着铝箔、 薄膜的商品化生产的发展， 铝箔、 薄膜商品形成系列化尺寸， 使得电容元 件的长度 L 也呈现系列化趋势， 因为利用铝箔、 薄膜商品的固有宽度尺寸， 不仅对于确保 电容元件的电气性能有益， 而且还能避免浪费昂贵的铝箔、 薄膜材料， 省去复杂的裁剪工 序。 从图 1所示的已有电容元件 1A的构造可见， 其长度 L等于薄膜宽度 B加上 2倍的电极 尺寸 A， 但电极尺寸 A不能贡献电容量。 因此， 在采用系列化尺寸的铝箔、 薄膜商品制作电 容元件 1A的过程中， 本发明通过縮小电极尺寸 A， 使电容元件 1A在保持长度 L不变的同时 增加电容量， 试验证明这是降低生产成本并提高产品附加值的有效的手段。 特别是在铝箔、 薄膜制造技术尚处于不发达的地区， 充分利用国际市场的标准化、 系列化的铝箔、 薄膜商 品及商品的系列化尺寸， 制造出体积小、 电容量大、 质量高的电力电容器产品， 对于加快 发展电力电容器的技术和产业十分重要。 下面参见图 6-10具体说明。
如图 6、 7所示， 每个焊装组件 13、 14或 15包括数量不等的多个电容元件 1， 每个电 容元件 1 由两张铝箔 2和两组薄膜 3卷绕而成， 其中铝箔 2是电容元件 1的导电层， 承担 电极功能， 薄膜 3是电容元件 1的绝缘介质层。 如图 8至图 10所示， 电容元件 1的两张铝 箔 2分别具有一个很窄的从相反方向伸出于薄膜 3的边缘的边条，该边条构成了电容元件 1 的电极 4， 当铝箔 2和两组薄膜 3卷绕数圈后， 所述的边条随之卷绕相同的圈数， 所以， 由 卷绕数圈的边条构成的电极 4实际上是由铝箔 2 的多层边条构成， 并且相邻两层边条之间 无绝缘介质 （图 10 ) 。 卷绕好的电容元件 1压扁后的形状如图 10所示， 电容元件 1的同一 个电极 4被薄膜 3的中心层 30分隔成 2个尺寸相同的电气连接部 41和 42， 这两个电气连 接部 41 42分别由构成同一个电极 4的多层边条叠成， 每个电气连接部 41或 42的边条层 数等于卷绕好的电容元件 1 的卷绕圈数， 用于提供与同一个电容元件 1 的层间、 与其他电 容元件 1的电气连接部之间或者与接线夹 7之间的电气连接。 图 8中每张铝箔 2的电极 4 的尺寸 a为 10mm至 15 优选为 12mm， 这种电极 4的尺寸 a是目前冷焊接和 /或冷机械夹 接电气连接中最小的， 以尺寸 a优选为 12mm为例， 本发明的电极 4的尺寸 a比现有技术的 冷焊接方式的 25 的电极尺寸 A縮小了 52%， 以尺寸 a优选为 12 元件长度 L为 350 为例， 本发明的电容元件 1的电容量比现有技术的冷机械夹接方式增加了 8. 6%
实现电极 4的尺寸 a的最小化，是采用下面所述的本发明的电力电容器的制造新方法和 电气连接的新结构所实现的。 如图 4所示的， 将构成每个焊装组件 13、 14或 15的各电容 元件 1之间先通过第一批多层共焊的超声波焊接结构 11实现电气连接， 然后将各焊装组件 13、 14和 15之间通过第二批多层共焊的超声波焊接结构 11实现电气连接。 在此所谓的第 一批是指在压装成芯子 10前的工序上形成的多层共焊的超声波焊接结构 11，而第二批是指 在压装成芯子 10后的工序上形成的多层共焊的超声波焊接结构 11。第一批的多层共焊的超 声波焊接结构 11与第二批的多层共焊的超声波焊接结构 11在结构形式上没有区别， 但由 于其形成的工序、 加工对象和使用设备不同， 所以在连接质量、 焊接效率等方面必然存在 区别。第一批的多层共焊的超声波焊接结构 1 1是在超声波焊接设备上实现的，其优点在于， 能充分利用设备提供的质量控制环境和自动化生产条件， 进一步提升焊接质量的水平和大 幅度提高自动化生产的程度。 第二批的多层共焊的超声波焊接结构 11是在超声波焊接工具 上实现的， 其优点在于能完成现有的冷焊机设备不能实现的焊接， 但不足是焊接质量的控 制需靠人， 影响生产效率。况且， 第一批的多层共焊不仅是实现超声波焊接结构 11的环节， 而且也是由多个电容元件 1组成每个焊装组件 13、 14或 15的环节， 通过该环节在压装前 先焊接的制造方法和形成焊装组件的结构形式， 将绝大部分的电气连接提前在能实现多层 共焊的超声波焊接机上完成， 可以有效克服现有焊接质量的不稳定直接制约产品向高端发 展和限制产品经济性能的提升的问题。 其优点体现在： 冷态焊接， 不损伤绝缘介质； 焊接 材料不熔融， 不会脆弱金属特性； 焊点导电性好， 连接电阻极小， 附加的电的损耗近乎为 零； 对焊接金属表面要求低， 氧化或电镀均不影响焊接； 焊接周期短， 不需任何助焊剂、 助焊气及焊料； 焊接无高温热源， 无污染， 环保安全； 特别是简化了组装芯子的加工难度， 且电容元件数量不受限制， 还能满足内熔丝电力电容器的生产需要。
上述的多层共焊是超声波焊接结构 1 1的重要结构特征， "多层共焊"是指将铝箔的多 层边条即电极 4共焊在一起， 各层边条之间在无压力的情况下也能保持紧密、 牢固的连接， 并且不会自行脱离的焊接结构。 因此， 多层共焊结构特征的基本功能之一是确保良好的电 气连接性能， 使连接电阻达到极小 （近乎为零） 的程度。 多层共焊结构特征的基本功能之 二是确保良好的机械连接性能， 使同一个焊装组件 13、 14或 15内的多个电容元件 1不松 散、 不分离， 并且第一批的焊接质量不会因后续的压装成形芯子等工序而受到影响。 本发 明的多层共焊包括两种具体形式， 一种是满层共焊形式， 另一种是非满层共焊形式。 "满 层共焊"是指电极 4的一个电气连接部 41或 42的全部边条均焊在一起的形式， 而 "非满 层共焊"是指电极 4的一个电气连接部 41或 42的部分边条共焊在一起的形式。 其中， 满 层共焊是一种优选的方式， 因为电极 4 的全部边条都参与载流， 所以能最大程度地提高电 极 4 的导电能力， 同时各边条的均衡载流会减小导体温升。 相比之下， 非满层共焊的缺层 情况下产生的未被共焊的边条可能会带来一些不利， 如给后续的整理带来困难。 根据是否 带有保护片 16， 上述的超声波焊接结构 11可包括两种具体的结构形式， 其中一种是复合结 构形式， 另一种是简单结构形式。 参考图 11和 12所示， 复合结构形式包括保护片 16， 保 护片 16放于接线夹 7与电容元件 1之间， 起保护元件电极的作用， 保护片 16包覆在电极 4 的电气连接部 41或 42的全部边条的外面， 经超声波焊接后形成带保护片 16的满层共焊复 合结构， 其中保护片 16与全部边条焊接在一起， 复合结构形式不仅能进一步加强超声波焊 接结构 11的连接强度， 同时还能保护超声波焊接结构 11不被破坏。 如果不带保护片 16， 则形成满层共焊的简单结构形式。 根据电气连接的不同要求， 超声波焊接结构 11还可分为 两种基本形式， 其中一种是双极的形式， 即超声波焊接结构 11具有相邻两个电极 4之间电 气连接的功能， 另一种是不具有两个电极 4 之间电气连接的功能的单极的形式。 可见， 本 发明的多层共焊的超声波焊接结构 11可以有多种具体形式， 其中多层共焊的超声波焊接结 构 11最有用的形式为以下四种： 一是带保护片 16的双极满层共焊复合结构 111 ; 二是带保 护片 16的单极满层共焊复合结构 112; 三是不带保护片 16的双极满层共焊简单结构； 四是 不带保护片 16的单极满层共焊简单结构。 这四种形式的具体应用说明如下：
如图 11和 12所示， 上述的带保护片 16的双极满层共焊复合结构 111具有相邻两个电 极 4之间电气连接的功能， 保护片 16包覆在相邻两个电极 4的电气连接部 41和 42的全部 边条的外面， 经超声波焊接后， 保护片 16与两个电气连接部 41和 42的全部边条焊接在一 起， 这种结构 111在焊装组件 13、 14或 15的内部电气连接上使用最多 （参见图 6、 7 ) 。 上述第三种的不带保护片的双极满层共焊简单结构 （图中未示出） 与第一种的带保护片 16 的双极满层共焊复合结构 111 的区别仅在于它不带保护片 16， 在连接强度和保护要求不需 要很高的情况下， 第三种的不带保护片的双极满层共焊简单结构也能满足较好的使用要求。 如 6和 7所示， 上述的带保护片 16的单极满层共焊复合结构 112不具有相邻两个电极 4之 间电气连接的功能， 保护片 16包覆在一个电极 4的两个电气连接部 41、 42中的一个电气 连接部 41或 42的全部边条的外面， 经超声波焊接后， 保护片 16与这一个电气连接部 41 或 42的全部边条焊接在一起， 它主要在冷机械夹接结构 12的形成过程中配合使用， 为了 便于后续的安装整理以进一步改善产品性能， 它也可用于不具有电气连接要求的电气连接 部 41或 42。 上述的第四种的不带保护片的单极满层共焊简单结构 （图中未示出）与带保护 片的单极满层共焊复合结构 112的区别仅在于它不带保护片 16， 它比较适用于不具有电气 连接要求的电气连接部 41或 42， 以便于后续的整理。
参见图 4、 6、 7、 13、 14， 将上焊装组件 13或下焊装组件 15与芯子 10的引出端 71或 72之间采用冷机械夹接结构 12实现电气连接， 即将上层的焊装组件 13与引出端 71之间采 用冷机械夹接结构 12连接， 再将下层的焊装组件 15与引出端 72之间采用冷机械夹接结构 12连接。这里所述的冷夹接结构 12包括设置在引出端 71或 72上的接线夹 7和设置在电极 4上的夹前结构 （图中未标注） ， 夹前结构建立在所述的芯子 10的上、 下端的两个焊装组 件 13、 15中的用作引出电气连接的那个电极 4的连接部 41、 42上， 所述的接线夹 7与所 述的夹前结构之间采用冷机械夹接。 夹前结构包括两种形式， 其中一种形式为建立在所述 的那个电极 4的连接部 41或 42上的多层紧贴的接触结构， 它在外压力的作用下多层紧贴 接触， 但不焊链， 其优点在于结构简单； 另一种形式为建立在所述的那个电极 4 的连接部 41或 42上的多层共焊的超声波焊接结构，它的具体形式是单极满层共焊复合结构 112或单 极满层共焊简单结构中的一种， 与前述的第一、 二批的多层共焊的超声波焊接结构 11在结 构形式上相同， 只是连接部位不同， 用于实现芯子 10的位于最上层或最下层的电容元件 1 的电极 4的位于最外侧的那个连接部 41或 42与接线夹 7之间的电气连接， 该电极 4是指 焊装组件 13或 15中的用作电气连接引出的那个电极 4。 所述的冷机械夹接结构 12的一种 理想的结构方案是多层共焊的冷夹接结构， 即采用多层共焊的夹前结构， 优选采用带保护 片 16的单极满层共焊复合结构 112， 接线夹 7承担电容器电极引出功能， 接线夹 7与上述 的电气连接外电极的单极满层共焊复合结构 112 之间采用冷机械夹接， 可进一步提高导电 性能或连接强度。 这里所述的冷机械夹接是通过机械夹紧力实现连接的， 接线夹 7 上可以 附设有提供夹紧力的装置， 也可另外增设提供夹紧力的夹子 （图中未示出） 。 多层共焊的 夹前结构的另一种实施方式是， 采用不带保护片 16的单极满层共焊简单结构与接线夹 7之 间实现冷机械夹接的形式， 这种形式的连接强度不如前述的带保护片 16的单极满层共焊复 合结构 112， 但也能满足基本的连接功能要求。 可替代多层共焊的夹前结构的方案还包括采 用非多层共焊的纯冷机械夹接的形式， 即多层紧贴的接触结构， 在这种情况下， 由于电容 元件 1的电极 4的电气连接部 41或 42的各边条之间没有建立共焊连接关系， 因此如果撤 去夹子提供的夹紧力， 则各边条之间可能会出现分离。 即使在施加夹紧力的情况下， 这种 非多层共焊的纯冷机械夹接的形式的夹接头所夹紧的电气连接部 41或 42的各边条之间还 存在较大的接触电阻， 该接触电阻会导致温升和电的损耗。
参见图 12， 本发明的多层共焊的超声波焊接结构 11的焊点 110的形状为网状长方形， 这是一个优选的方案， 它可以在较小的电极 4的尺寸 a的情况下， 使焊点 110的面积最大 化， 而焊点 110的面积越大， 则该焊接结构 11的导电能力越强。
参见图 5， 本发明的多层共焊的超声波焊接结构 11可朝电容元件 1的厚度 H方向弯曲， 显然， 这种弯曲的结构可进一步縮小芯子 10的长度尺寸， 有利于改善芯子 10与主绝缘 70 之间的绝缘隔离效果。 与现有的冷焊接或冷机械夹接方式相比， 本发明的多层共焊的超声 波焊接结构 11不仅可以实现所述的弯曲， 而且可以非常便捷地实现所述的弯曲工序。
下面结合附图 1至 14说明本发明的电力电容器的制造方法， 它包括以下工序步骤： 步骤一： 制作多个规格相同的电容元件 1， 其中每个电容元件 1由两张铝箔 2和两组薄 膜 3卷绕而成， 并且每个电容元件 1的两侧边缘分别伸出的两个电极 4， 每个电极 4的尺寸 a均为 10mm至 15mm; (参见图 8至图 10 ) ;
步骤二:采用超声波焊接设备将预定数量的多个电容元件 1的电极 4在无压力的状态下 依次进行超声波焊接， 以实现每个电容元件 1 的电极 4之间的电气连接， 并且将多个电容 元件 1叠装在一起， 分别形成多个焊装组件 13、 14、 15， 采用超声波焊接设备在每个焊装 组件上建立第一批的多层共焊的超声波焊接结构 11， 以便在同一个焊装组件内的各电容元 件 1之间建立起固定连接关系， 同时在同一个焊装组件内的各电容元件 1的电极 4之间实 现电气连接； （见图 6至图 7 )
步骤三： 将各焊装组件 13、 14、 15之间固定连接之后， 按照设计要求压装成芯子 10; (见图 4)
步骤四：采用超声波焊接工具对压装好的芯子 10进行超声焊接， 在构成芯子 10的各焊 装组件 13、 14、 15之间， 按照焊装组件之间的串并联电气连接的设计要求建立第二批的多 层共焊的超声波焊接结构 11， 以实现每个相邻叠装的焊装组件 13、 14、 15之间的电气连接， 满足芯子 10所需要的各焊装组件 13、 14、 15之间的串并联连接； （见图 4、 6、 7、 11、 12 ) 步骤五：先分别将处于芯子 10的上、 下两端的焊装组件 13、 15中的最外侧引出的那个 电极 4建立夹前结构， 然后用手持式机械夹接工具分别将电容器的引出端 71、 72上的接线 夹 7与该夹前结构进行夹接， 所述的夹接包括接线夹 7与多层共焊的超声波焊接结构 11之 间的夹紧连接， 形成电容器的各引出端的冷机械夹接结构 12， 满足芯子 10的整体电容功能 (见图 4、 6、 7、 13、 14) 。
上述步骤五中还包括弯曲、整理超声波多层共焊的超声波焊接结构 11、冷焊接结构 12， 将弯曲、 整理后的芯子 10固定安装在主绝缘 70 内 （见图 5 ) ， 以及在此之后的将主绝缘 70和芯子 10安装在壳体 （图中未示出） 内的步骤。
所述的超声波焊接设备可以是一种通用的超声波焊接机，或者是一种以通用的超声波焊 接机为主体构成的流水线。 超声波焊接工具可采用在组装成芯子后易于实现超声波焊接的 操作的超声波焊接工具， 并且。 所述的手持式机械夹接工具是一些与冷机械夹接结构 12相 匹配的公知的工具。

Claims

权 利 要 求 书
1 . 一种电力电容器， 包括安装在主绝缘 (70)内的芯子（10)和至少 2个与外部电路连接 的引出端 （71、 72 ) ， 其特征在于：
所述的芯子 （10 )包括多个相互叠装在一起的焊装组件 （13、 14、 15 ) ， 每个焊装组件 ( 13、 14、 15 ) 包括多个电容元件 （1 ) ， 每个电容元件（1)由两张铝箔（2)和两组薄膜（3) 卷绕而成， 每个电容元件（1)的两张铝箔 (2)上具有分别从薄膜 (3)的边缘相反方向伸出的两 个电极（4)， 并且每个电极（4)的尺寸 a为 10mm至 15mm;
所述的每个焊装组件 （13、 14、 15 ) 内部的各电容元件（1)之间通过第一批的多层共焊 的超声波焊接结构（11)实现电气连接， 各焊装组件 （13、 14、 15 ) 之间通过第二批的多层 共焊的超声波焊接结构（11)实现电气连接， 位于所述的芯子（10)的上、 下端的两个焊装组 件 （13、 15 ) 分别与引出端 （71或 72 ) 之间通过冷机械夹接结构（12)实现电气连接。
2. 根据权利要求 1所述的电力电容器， 其特征在于： 所述的多层共焊的超声波焊接结 构（1 1)为带保护片（16)的双极满层共焊复合结构（11 1)或不带保护片的双极满层共焊简单 结构， 双极满层共焊复合结构（11 1)或双极满层共焊简单结构的设置部位在相邻两个电容元 件（1)的相邻两个电极 （4 ) 的相邻两个电气连接部 （41和 42 ) 上。
3. 根据权利要求 1所述的电力电容器， 其特征在于： 所述的多层共焊的超声波焊接结 构（1 1)为带保护片（16)的单极满层共焊复合结构（112)或为不带保护片的单极满层共焊简 单结构， 单极满层共焊复合结构（112)或单极满层共焊简单结构的设置部位在同一个电容元 件（1)的同一个电极 （4 ) 两个电气连接部 （41或 42 ) 中的一个上。
4. 根据权利要求 1所述的电力电容器， 其特征在于：
所述的冷机械夹接结构（12)包括一个夹前结构和接线夹 (7)， 夹前结构建立在所述的芯 子（10)的上、 下端的两个焊装组件 （13、 15 ) 中的用作引出电气连接的那个电极 (4)的连接 部 （41、 42 ) 上， 所述的接线夹（7)设置在引出端 （71或 72 ) 上， 接线夹 (7)与所述的夹前 结构之间采用冷机械夹接。
5. 根据权利要求 4所述的电力电容器， 其特征在于：
所述的夹前结构为建立在所述的那个电极 (4)的连接部（41或 42 )上的多层紧贴的接触 结构； 或者
所述的夹前结构为建立在所述的那个电极 (4)的连接部（41或 42 )上的多层共焊的超声 波焊接结构。
6. 根据权利要求 1所述的电力电容器， 其特征在于： 所述的电极 (4)的尺寸 a优选为 12mm。
7. 根据权利要求 1至 3所述的任意一种电力电容器， 其特征在于： 所述的多层共焊的 超声波焊接结构（11)的焊点（110)的形状为网状长方形。
8. 根据权利要求 1至 3所述的任意一种电力电容器， 其特征在于： 所述的多层共焊的 超声波焊接结构（11)朝电容元件 1的厚度 H方向弯曲。
9. 一种电力电容器的制造方法， 包括以下步骤：
步骤一： 制作多个规格相同的电容元件 （1 ) ， 其中每个电容元件（1)由两张铝箔（2) 和两组薄膜 (3)卷绕而成， 并且每个电容元件（1)的两侧边缘分别伸出的两个电极 (4)， 每个 电极（4)的尺寸 a均为 10 至 15
步骤二： 采用超声波焊接设备将预定数量的多个电容元件 1的电极 （4 ) 在无压力的状 态下依次进行超声波焊接， 以实现每个电容元件 （1 ) 的电极 （4 ) 之间的电气连接， 并且 将多个电容元件 （1 ) 叠装在一起， 分别形成多个焊装组件 （13、 14、 15 ) ， 采用超声波焊 接设备在每个焊装组件上建立第一批的多层共焊的超声波焊接结构 （11 ) ， 以便在同一个 焊装组件内的各电容元件 （1 ) 之间建立起固定连接关系， 同时在同一个焊装组件内的各电 容元件 （1 ) 的电极 （4 ) 之间实现电气连接；
步骤三： 将各焊装组件 （13、 14、 15 ) 之间固定连接之后， 压装成芯子（10) ;
步骤四： 采用超声波焊接工具对压装好的芯子（10)进行超声焊接， 在构成芯子（10)的各 焊装组件 （13、 14、 15 ) 之间建立第二批的多层共焊的超声波焊接结构（11)， 以实现每个 相邻叠装的焊装组件 （13、 14、 15 ) 之间的电气连接；
步骤五： 先分别将处于芯子（10)的上、 下两端的焊装组件（13、 15 ) 中的最外侧引出的 那个电极 (4) 建立夹前结构， 然后用手持式机械夹接工具分别将电容器的引出端 （71、 72 ) 上的接线夹 （7 ) 与夹前结构进行夹接， 形成电容器的各引出端的冷机械夹接结构（12)。
10. 根据权利要求 9所述的电力电容器的制造方法， 其特征在于： 步骤五中进一步包括 弯曲、 整理超声波多层共焊的超声波焊接结构（11)、 焊冷焊接结构（12)， 将芯子（10)固定 安装在主绝缘 (70)内的步骤。
PCT/CN2013/088289 2013-10-14 2013-12-02 电力电容器及其制造方法 WO2015054949A1 (zh)

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CN103531357A (zh) 2014-01-22
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US20160300664A1 (en) 2016-10-13
AU2013403103B2 (en) 2018-01-04
CN103531357B (zh) 2016-08-10
EP3059747A1 (en) 2016-08-24

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