WO2022151899A1 - 一种铝电解电容器集成模块 - Google Patents
一种铝电解电容器集成模块 Download PDFInfo
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- WO2022151899A1 WO2022151899A1 PCT/CN2021/138356 CN2021138356W WO2022151899A1 WO 2022151899 A1 WO2022151899 A1 WO 2022151899A1 CN 2021138356 W CN2021138356 W CN 2021138356W WO 2022151899 A1 WO2022151899 A1 WO 2022151899A1
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- aluminum electrolytic
- electrolytic capacitor
- capacitor
- thermally conductive
- module
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- 239000003990 capacitor Substances 0.000 title claims abstract description 283
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 174
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 230000017525 heat dissipation Effects 0.000 claims abstract description 23
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims description 53
- 239000002184 metal Substances 0.000 claims description 53
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 26
- 229910052802 copper Inorganic materials 0.000 claims description 26
- 239000010949 copper Substances 0.000 claims description 26
- 238000009413 insulation Methods 0.000 claims description 25
- 238000009434 installation Methods 0.000 claims description 15
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- 238000001746 injection moulding Methods 0.000 claims description 13
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
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Images
Classifications
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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
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0003—Protection against electric or thermal overload; cooling arrangements; means for avoiding the formation of cathode films
-
- 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
- H01G2/08—Cooling arrangements; Heating arrangements; Ventilating arrangements
-
- 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
- H01G2/10—Housing; Encapsulation
-
- 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
- H01G2/10—Housing; Encapsulation
- H01G2/106—Fixing the capacitor in a housing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/008—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/06—Mounting in containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
- H01G9/10—Sealing, e.g. of lead-in wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/14—Structural combinations or circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/26—Structural combinations of electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices with each other
Definitions
- the invention relates to a novel packaged aluminum electrolytic capacitor structural form, namely an aluminum electrolytic capacitor module, in particular to the integration and modularization of discrete aluminum electrolytic capacitors, the use of radiators for heat dissipation, the use of temperature sensors to monitor the internal temperature rise of the capacitor module, and the integration of Y capacitors.
- Optimize the EMC performance of the power supply device so that it can improve the performance and reliability in the application of power electronic devices such as switching power supplies, inverters or frequency converters.
- the radiator of the power supply device used by the capacitor mainly provides heat dissipation for the IGBT/MOSFET power semiconductor devices, and other passive components including aluminum electrolytic capacitors are dissipated by the "direct ventilation" method of the fan.
- other passive components including aluminum electrolytic capacitors are dissipated by the "direct ventilation" method of the fan.
- "Direct ventilation" is adopted for cooling and heat dissipation; especially as the power density of power supply equipment continues to increase, the requirements for heat dissipation of aluminum electrolytic capacitors used in main circuit bus filter applications are also increasing.
- the aluminum electrolytic capacitor module also needs to be provided with an internal pressure release guarantee mechanism.
- the positive and negative conductive copper bars of the busbar need to be as close as possible to reduce the inductance, so there is a high manufacturing process difficulty;
- the high scrap rate in the manufacturing process poses a greater risk of electric shock safety to test workers; and the product has a high failure rate during use, so it is necessary to adopt a new product design to avoid the above problems and improve the quality.
- the internal integration structure of the aluminum electrolytic capacitor module is complex, the manufacturing process is difficult, and the risk of technical failure is high.
- the overall independent bus bar terminal board can be adaptively changed in shape according to the structural shape of the aluminum electrolytic capacitor module and the installation position, angle, and distance of the electrical connection terminals.
- the insulating casing is used to insulate the multiple assembly units formed by the aluminum electrolytic capacitor and the metal heat-conducting member base, and a series or multi-stage series-parallel structure circuit is formed by electrically connecting the bus bars.
- the insulating casing needs to be provided with a corresponding independent air cavity. And the pressure release mechanism formed by the release outlet to avoid the leakage of the electrolyte with the negative voltage caused by the failure of the aluminum electrolytic capacitor unit and cause the short circuit between the upper and lower series of aluminum electrolytic capacitor units.
- the radiator can be a radiator of any structure, shape and type;
- auxiliary radiator can be an integral part of the power supply housing, and the outer part of the housing is provided with heat dissipation fins, and the inner side and the capacitor module are isolated and assembled by the thermal insulation sheet;
- the auxiliary radiator is used to reduce the temperature rise and combined with the secondary sealing of the capacitor unit, which breaks the upper limit of the normal design working life of aluminum electrolytic capacitors of 15 years, so it can be With long life, such as the application requirements of outdoor string photovoltaic inverters with a life of 25 years; the production of aluminum electrolytic capacitor modules has greatly promoted the development of aluminum electrolytic capacitor applications.
- the aluminum electrolytic capacitor module can provide high temperature work protection monitoring and working life temperature prediction for the aluminum electrolytic capacitor module by integrating the temperature sensor;
- the heat loss is dissipated to the outside of the airtight shell; effectively reduces the temperature rise and heat accumulation inside the power shell; reduces the failure rate of the power supply; prolongs the working life of the capacitor module; and ensures that the power supply has high-level protection against dust and moisture;
- the aluminum electrolytic capacitor module integrates the Y capacitor, which effectively solves the problem that the high-order harmonics existing on the power DC bus cause the electrolyte inside the aluminum electrolytic capacitor to convert the negative electrode foil into reverse pulse current, so as to avoid premature aging and failure of the aluminum electrolytic capacitor; at the same time, Y
- the capacitor can effectively suppress the common mode interference of the power electronic device, and improve the EMC reliability of the power electronic device system of the whole machine.
- FIG. 1 Schematic diagram of nested structure assembly of aluminum electrolytic capacitor monomer and metal thermally conductive base member
- Figure 8 is a schematic diagram of installing an NTC temperature sensor module
- the positive and negative lead terminals 11 of the discrete aluminum electrolytic capacitor unit 1 pass through the positive and negative lead through holes 313 on the bottom plate 31 of the injection molded case, and are welded and electrically connected to the positive bus bar 32 and the negative bus bar 34; the bottom plate 31 of the injection molded case corresponds to metal thermal conductivity
- the NTC temperature sensor bayonet 25 and the Y capacitor combination module bayonet 26 on the base member 2 are installed at the position of the guide hole 24.
- the capacitor combination modules 6 are respectively placed therebetween, and after assembly, they become an integral aluminum electrolytic capacitor module. (Figure 2, Figure 3)
- the main radiator 9 and the auxiliary radiator 8 are installed in isolation from each other to prevent the high temperature generated by the IGBT module on the main radiator 9 from being dissipated by the auxiliary (sub) radiator 8, which will bring high temperature influence to the capacitor module. ( Figure 10)
- the aluminum electrolytic capacitor module with integrated Y capacitor is composed of multiple aluminum electrolytic capacitors 1 and two series Y capacitors 611 in parallel.
- the two series Y capacitors 611 are connected across the positive conductive copper bar 32 and the negative conductive copper bar 34. Between the two series Y capacitors 611, a ground wire 65 is drawn out. (The circuit structure is shown in Figure 11)
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Inverter Devices (AREA)
Abstract
Description
Claims (42)
- 一种铝电解电容器集成模块,包括分立铝电解电容器单体、导热基体构件、导热绝缘片、外壳以及附属母线端子板和散热器,所述电容器模块由分立式铝电解电容器和导热基体构件之间紧密装配构成,所述铝电解电容器模块采用导热绝缘片对外集中绝缘散热,所述铝电解电容器模块可以集成温度传感器和Y电容。
- 如权利要求1所述的导热基体构件可以是任何形状、大小和结构形式与分立铝电解电容器单体形成紧凑的装配结构体。
- 如权利要求1、2所述的分立铝电解电容器单体和导热基体构件可以构成多个装配体单元,通过设计电连接母线排构成串联或多级串并联电路结构的铝电解电容器模块。
- 如权利要求1、2所述的分立铝电解电容器单体和导热基体构件之间紧密装配可以采用巢孔或半巢孔结构方式,将铝电解电容器铝壳圆周表面全部或部分置于导热基体构件的圆孔或半圆内。
- 如权利要求1、4所述的分立铝电解电容器单体和导热基体构件之间紧密装配,可以使导热基体构件的(巢)圆孔与铝电解电容器铝壳形成锥度配合降低装配难度。
- 如权利要求1所述的分立铝电解电容器单体可以是引线型、牛角型或螺钉型引出结构的铝电解电容器产品。
- 如权利要求1所述的分立铝电解电容器单体正负极侧封口位置可以采用密封材料如环氧树脂等做二次密封。
- 如权利要求1、7所述分立铝电解电容器单体的封口位置二次密封,可以装配后利用导热基体构件的巢孔密封粘接为一体,也可以分立电容器提前独立二次密封再装配。
- 如权利要求1所述的外壳将分立铝电解电容器和导热基体构件的装配体包覆绝缘,可以由塑胶或三防(绝缘)漆等单一或多重材料进行全部或部分包覆。
- 如权利要求1、9所述的外壳内外表面可以设置附设结构用于夹持或固定外壳本身和电容器模块整体。
- 如权利要求1、9所述的外壳和导热基体构件可以组成内部压力释放机构的空气腔体及设置压力释放出口,在分立铝电解电容器单体由于故障开启压力释放机构,空气腔体可以避免带有负极电的电解液泄露引起铝电解电容器模块短路。
- 如权利要求1、11所述内部压力释放机构的空气腔体,对应铝电解电容器和金属导热构件基体构成的多个装配体单元,需设置对应的独立空气腔体及释放出口避免带有负极电压的电解液泄露引起上下串的铝电解电容器单元间短路。
- 如权利要求1所述导热基体构件可以设置孔或槽等附设结构用于夹持或固定外壳和母线端子板等结构部件。
- 如权利要求1所述的导热绝缘垫片可以是绝缘导热陶瓷或硅胶等各类绝缘导热材料。
- 如权利要求1、14所述的导热基体构件和导热陶瓷绝缘垫片,其特征在于导热基体构件可以是全部或部分导热陶瓷或硅胶材料构成。
- 如权利要求1、14所述的导热绝缘片细节呈片状降低厚度及热阻,而整体可以呈槽状或其他形状方便集成模块结构设计。
- 如权利要求1、14、16所述导热绝缘片可以与电容器模块安装时组合装配,也可以与导热基体构件或附属散热器形成一体结构。
- 如权利要求1所述的集成温度传感器绝缘表贴或置入导热基体构件内部,间接监测所有分立铝电解电容器单体的平均工作温升。
- 如权利要求1、18所述装配温度传感器的导热构件基体,其特征是铝电解电容器模块内部可以单独设置用于温度传感器表贴或置入其内部的导热构件。
- 如权利要求1、18所述的温度传感器可以是NTC或PTC热敏电阻或者K型J型等等规格热电偶及其他种类的温度传感器件。
- 如权利要求1、18所述的温度传感器可以是薄膜、环氧、玻璃、金属等任何材质种类和封装形式的温度传感器件。
- 如权利要求1、18所述铝电解电容器模块可以设置多只温度传感器件,分布在导热基体构件不同位置,以各温度传感器的平均数值作为结果精准监测。
- 如权利要求1所述铝电解电容器模块的母线端子板,其中一体式母线端子板包括电连接母线铜排和注塑体,母线铜排为分立铝电解电容器组成并联、串联或多级串并联电路结构的导电铜排,注塑体为整体包覆导电铜排以及内部各导电铜排之间绝缘隔离的注塑材料,导电铜排与注塑体通过注塑或粘接工艺成为一个独立的整体结构零件。
- 如权利要求23所述一体式母线端子板的某些位置注塑体避空,导电铜排裸露用于分立铝电解电容器正负极引线或焊片与导电铜排焊接。
- 如权利要求23所述的一体式母线端子板,其特征是在多级串并联电路结构的母线端子板上可以设置均压电阻或其他电路必要元器件的焊接位注塑避空;
- 如权利要求23所述的一体式母线端子板及其引出电连接端子,可以根据铝电解电容器模块外形结构和电连接端子的安装位置、角度、距离等做适应性变换长度、形状以适应与功率主板或导电铜排电连接的安装需要。
- 如权利要求23所述的一体式母线端子板内部可以具有一组(串)或多组(串)正负极母线电路。
- 如权利要求23所述的一体式母线端子板内外表面可以增设附设结构用于夹持或固定母线端子板本身或电容器模块。
- 如权利要求1所述的铝电解电容器模块其所有分立铝电解电容器单体正负极可以直接连接功率主电路PCB板与IGBT/MOSFET模块和功率母线电连接,即可以采用适合PCB电路板作为母线端子板使用。
- 如权利要求1所述附属散热器通过导热绝缘片安装到电容器模块上。
- 如权利要求1、28所述的附属散热器可以是空气冷却翅片散热器,也可以是液冷等种类散热器或是电源装置壳体等传热导热物体。
- 如权利要求1、28所述的附属散热器采用螺钉紧固或弹片压紧等方式与电容器模块进行装配。
- 如权利要求28、29、30所述附属散热器的翅片可以设置于电源装置壳体外侧,电容器模块安装于电源装置密闭壳体内侧,附属散热器做为高防护密闭等级电源装置的副散热器使用。
- 如权利要求28所述附属散热器可以是电容器模块专用散热器,也可以是电容器模块与其他器件共用散热器,或者多支电容器模块共用副散热器。
- 如权利要求31所述副散热器可以与主散热器设置在电源装置同个外壳平面,也可以设置在其他侧面不同外壳平面内。
- 如权利要求29、31、32所述附属散热器在电源装置壳体内部可以是多种异形结构,方便电容器模块在电源壳体内的布置。
- 如权利要求1所述集成Y电容有正极和接地线、负极和接地线两种电连接,Y电容(串联)和铝电解电容器在正负极上构成并联电路结构。
- 如权利要求1所述集成Y电容可以是陶瓷或薄膜电容器等任何种类的电容器。
- 如权利要求1所述集成Y电容可以是一支Y电容跨接使用,也可以多只Y电容(组)并联跨接使用,可以内置在电容器模块内部,也可以外挂电容器模块外部。
- 如权利要求1所述集成Y电容(组)可以采用焊接方式也可以同步电容器模块通过螺钉旋紧方式与功率主板或母线铜排电连接。
- 如权利要求1所述集成Y电容串联正极和负极同时与地线两路电连接,也可单独Y电容 与正极或者负极与地线一路电连接。
- 如权利要求1所述集成Y电容的接地线可以是金属导线或任何形状的金属导电排,可以直接引出与整机地线连接或设置转接端子与整机地线连接。
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CN202110052679.9A CN112701880A (zh) | 2021-01-15 | 2021-01-15 | 一种功率电源的电容器模块绝缘散热方式 |
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CN202110059121.3A CN112713004A (zh) | 2021-01-15 | 2021-01-15 | 一种铝电解电容器模块的母线端子板 |
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