WO2012097559A1 - 一种高寿命电解电容 - Google Patents
一种高寿命电解电容 Download PDFInfo
- Publication number
- WO2012097559A1 WO2012097559A1 PCT/CN2011/074208 CN2011074208W WO2012097559A1 WO 2012097559 A1 WO2012097559 A1 WO 2012097559A1 CN 2011074208 W CN2011074208 W CN 2011074208W WO 2012097559 A1 WO2012097559 A1 WO 2012097559A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- outer casing
- capacitor
- electrolytic capacitor
- aluminum foil
- pressure reducing
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 85
- 238000007789 sealing Methods 0.000 claims abstract description 54
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 37
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000011888 foil Substances 0.000 claims abstract description 27
- 239000003792 electrolyte Substances 0.000 claims abstract description 18
- 230000006837 decompression Effects 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 239000008151 electrolyte solution Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 230000007903 penetration ability Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H01G9/08—Housing; Encapsulation
- H01G9/12—Vents or other means allowing expansion
Definitions
- the invention relates to an electrolytic capacitor, in particular to a high-life electrolytic capacitor.
- Electrolytic capacitors are a must for many electronic and electrical products. Since electrolytic capacitors are accompanied by an electrolytic process during charging and discharging, the capacitance is larger than that of other types of capacitors, so electrolytic capacitors are difficult to replace.
- the electrolytic capacitor Since the electrolytic capacitor is accompanied by an electrolysis process during the working process, a trace amount of gas will escape, and the electrolytic capacitor generates heat during the working process, causing the temperature to rise and generate a certain vapor, so the existing electrolytic capacitor is not May be sealed.
- the existing electrolytic capacitor structure Due to the limitation of the existing electrolytic capacitor structure, as the structure cannot be sealed, as the use time increases, the electrolyte is continuously reduced, and the electrolysis process is gradually weakened, and the electric capacity is gradually reduced. When the electrolyte is dry, The capacitor is completely disabled, causing the entire circuit to fail. Therefore, the existing electrolytic capacitor has a problem that the life is short and the capacity is unstable.
- the embodiment of the present invention provides a high-life electrolytic capacitor.
- the technical solution is as follows:
- a high-life electrolytic capacitor includes an inner hollow outer casing, one end of the outer casing is connected with a closed cover, and the other end is connected with an opening cover, and the closed cover is provided with positive and negative electrode pins, and the outer casing
- the inside of the aluminum foil core is provided with an electrolyte, and the aluminum foil core is respectively connected to the positive and negative electrode pins through a connecting wire, and the capacitor further includes a pressure reducing device.
- the pressure reducing device is used for sealing the capacitor, and the pressure reducing device is further configured to change the volume of the capacitor to balance the pressure inside and outside the capacitor.
- the pressure reducing device includes a flexible sealing sheet disposed between the opening cover and the outer casing. Further, in order to press the sealing sheet, a gasket is disposed between the sealing sheet at the opening cover and the outer casing, and the hardness of the gasket is smaller than the hardness of the outer casing.
- the pressure reducing device further includes a sealing sheet disposed between the closed cover and the outer casing.
- the capacitor of the present invention forms a highly sealed structure, and a gasket is disposed between the sealing sheet at the opening cover and the outer casing, and the sealing cover is A gasket is disposed between the sealing sheet and the outer casing, and the hardness of the gasket is less than the hardness of the outer casing.
- the pressure reducing device includes a metal film disposed between the opening cover and the outer casing.
- the pressure reducing device further includes a sealing sheet disposed between the closed cover and the outer casing.
- a cavity is provided between the aluminum foil core and the outer casing, and the cavity is used to fill the electrolyte.
- the embodiment of the present invention further provides another high-life electrolytic capacitor, which comprises an inner hollow outer casing, one end of the outer casing is connected with a closed cover, and the other end is open, and the closed cover is provided with positive and negative electrode pins.
- An inner surface of the outer casing is provided with an aluminum foil core, and an inner portion of the aluminum foil core is provided with an electrolyte, and the aluminum foil core is respectively connected to the positive and negative electrode pins through a connecting wire, and the capacitor further includes A pressure reducing device for sealing the capacitor, the pressure reducing device also for changing a volume of the capacitor to achieve a pressure balance inside and outside the capacitor.
- the open end of the outer casing is provided with an upper positioning card and a lower positioning card
- the decompression device includes a piston disposed between the upper positioning card and the lower positioning card.
- the embodiment of the present invention causes the capacitor to form a sealed structure and decompress according to the pressure inside and outside the casing.
- the sealing sheet can expand the volume; when the pressure reaches a certain value, the vapor generated by the temperature rise and the gas released by the charging and discharging can be balanced with the dissolved gas.
- Stable working state very small amount of insoluble gas has strong penetration ability and can escape through the structural gap of the flexible sealing sheet; when the capacitor stops working or cools down, the gas can be dissolved back into the electrolyte, so the embodiment of the invention can The life of the electrolytic capacitor is effectively increased, and the capacity is kept stable.
- FIG. 1 is a front cross-sectional view showing a high-life electrolytic capacitor according to an embodiment of the present invention
- Fig. 2 is a front cross-sectional view showing a high-life electrolytic capacitor according to another embodiment of the present invention.
- a high-life electrolytic capacitor according to an embodiment of the present invention comprises an inner hollow outer casing 1 , one end of the outer casing 1 is connected with a closed cover 6 , and the other end is connected with an opening cover 9 .
- the inner cover 1 is provided with a positive electrode lead 6.1 and a negative electrode lead 6.2.
- the inside of the outer casing 1 is provided with an aluminum foil core 7, the inside of the aluminum foil core 7.
- the second aluminum foil core 7 is connected to the positive electrode lead 6.1 and the negative electrode lead 6.2 through a connecting wire 3, the capacitor further includes a pressure reducing device, A pressure reducing device is used for sealing the capacitor, and the pressure reducing device is further configured to change the volume of the capacitor to balance the pressure inside and outside the capacitor.
- the pressure reducing device includes a flexible second sealing sheet 10 disposed between the opening cover 9 and the outer casing 1.
- the pressure reducing device may further include a flexible first sealing sheet 5 disposed between the closed cover 6 and the outer casing 1.
- a cavity 8 is provided between the aluminum foil core 7 and the outer casing 1, and the cavity 8 is used to fill the electrolyte 2 so that the outer surface of the aluminum foil core 7
- the electrolytic solution 2 is also filled. Therefore, the electrolytic solution 2 added to the electrolytic capacitor of the present invention has more electrolytic capacitors than the prior art, so that the electrolytic capacitor of the present invention does not dry out for 8-10 years, and therefore, can be effective. Extend the life of electrolytic capacitors, especially for electronic devices with harsh working conditions, such as power supplies for high-power LED street lamps.
- the present invention forms a highly sealed structure, and a second gasket 11 is disposed between the second sealing sheet 10 and the outer casing 1.
- a first gasket 4 is disposed between the first sealing sheet 5 and the outer casing 1, and the hardness of the first gasket 4 and the second gasket 11 are both smaller than the hardness of the outer casing 1.
- the outer casing 1 is a pressure resistant outer casing.
- the outer casing 1 is preferably a stainless steel outer casing.
- the outer casing 1 is not limited to a stainless steel outer casing, as long as it can satisfy any of the pressure-resistant functions, such as an aluminum casing, a nylon casing, and the like.
- the gasket is preferably an aluminum gasket which, while ensuring that the gasket is compressible, also consumes a portion of the aluminum to compensate for the consumption of aluminum in the aluminum foil core 7 during electrolysis.
- the gasket is not limited to being non-aluminum, as long as any metal gasket capable of satisfying the compression function can be used.
- the sealing sheets i.e., the first sealing sheet 5 and the second sealing sheet, are each preferably a latex sealing sheet.
- the sealing sheet is not limited to a latex sealing sheet and may be any flexible sealing sheet such as a silicone sealing sheet.
- the opening of the opening cover 9 is provided with an opening 9. 1.
- the opening 9.1 of the opening cover 9 has a diameter equal to the diameter of the inner hole of the second gasket 11, and the opening is sealed.
- the cover 9 is preferably made of plastic.
- the electrolytic capacitor forms a highly sealed structure, and a flexible second sealing sheet 10 is disposed between the opening of the opening cover 9 and the outer casing 1 when the capacitor is internally generated.
- the second sealing sheet 10 can expand the volume; when the pressure reaches a certain value, the vapor generated by the temperature rise and the gas released by the charging and discharging can be balanced with the gas which is dissolved back.
- Stable working state very small amount of insoluble gas has strong penetration ability and can escape through the structural gap of the flexible sealing sheet
- the capacitor stops working or cools the gas can be dissolved back into the electrolyte 2, so the embodiment of the invention Can effectively increase the life of the electrolytic capacitor and maintain the capacitance The amount is stable.
- FIG. 1 another embodiment of the present invention is different from the embodiment shown in FIG. 1 in that the decompression device of the embodiment is disposed on the opening cover 9 and the outer casing 1 .
- the metal film between the other is the same, and will not be described in detail in this embodiment.
- the high-life electrolytic capacitor includes an inner hollow outer casing 1, and one end of the outer casing 1 is connected with a closed cover 6 and the other end is open, and the closed cover 6 is closed.
- the inside of the outer casing 1 is provided with an aluminum foil core 7, and the inside of the aluminum foil core 7 is provided with an electrolyte 2, and the aluminum foil coil is provided with a positive electrode lead 6.1 and a negative electrode lead 6.2.
- the core 7 is connected to the positive electrode lead 6.1 and the negative electrode lead 6.2 via a connecting wire 3, the capacitor further comprising a pressure reducing device for sealing the capacitor
- the pressure reducing device is further configured to change a volume of the capacitor to balance the pressure inside and outside the capacitor.
- the open end of the outer casing 1 is provided with an upper positioning card 12 and a lower positioning card 13, and the decompression device comprises a top positioning card 12 and the lower positioning card 13 Piston 14 between.
- the distance between the upper positioning card 12 and the lower positioning card 13 defines the stroke of the piston 14.
- the pressure reducing device may further include a flexible first sealing sheet 5 disposed between the closed cover 6 and the outer casing 1.
- a first gasket 4 is disposed between the first sealing sheet 5 and the outer casing 1, and the first gasket 4 The hardness is less than the hardness of the outer casing 1.
- the gasket is preferably an aluminum gasket which, while ensuring that the gasket is compressible, also consumes a portion of the aluminum to compensate for the consumption of aluminum in the aluminum foil core 7 during electrolysis.
- the gasket is not limited to being non-aluminum, as long as any metal gasket capable of satisfying the compression function can be used.
- the outer casing 1 is a pressure resistant outer casing.
- the outer casing 1 is preferably a stainless steel outer casing.
- the outer casing 1 is not limited to a stainless steel outer casing, as long as it can satisfy any of the pressure-resistant functions, such as an aluminum casing, a nylon casing, and the like.
- a cavity 8 is provided between the aluminum foil core 7 and the outer casing 1, and the cavity 8 is used to fill the electrolyte 2 so that the outer surface of the aluminum foil core 7
- the electrolytic solution 2 is also filled. Therefore, the electrolytic solution 2 added to the electrolytic capacitor of the present invention has more electrolytic capacitors than the prior art, so that the electrolytic capacitor of the present invention does not dry out for 8-10 years, and therefore, can be effective. Extend the life of electrolytic capacitors, especially for electronic devices with harsh working conditions, such as power supplies for high-power LED street lamps.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
一种高寿命电解电容
技术领域
本发明涉及一种电解电容， 特别涉及一种高寿命电解电容。
背景技术
电解电容是很多电子电器产品的必用元件。 由于电解电容在充电和放电过程中伴有电 解过程， 所以电容量较之其它类型的电容的电容量大， 因此电解电容是很难替代的元件。
由于电解电容在工作过程中伴有电解过程， 则会有微量气体逸出， 并且电解电容在工 作过程中， 会产生热量， 致使温度升高， 产生一定蒸气， 因此现有的电解电容的是不可能 密封的。
受现有的电解电容结构限制， 由于结构无法密封， 随着使用时间的增加， 电解液在不 断减少， 同时电解过程也逐步减弱， 随之电容量也逐步降低， 当电解液干涸之时， 则电容 完全失效， 从而造成整个电路不能运行。 因此， 现有的电解电容存在寿命短及电容量不稳 定的问题。
发明内容
为了解决现有技术中存在的电解电容寿命短及电容量不稳定的问题， 本发明实施例提 供了一种高寿命电解电容。 所述技术方案如下：
一种高寿命电解电容， 包括内部中空的外壳， 所述外壳的一端连接着封闭封盖， 另一 端连接着开口封盖， 所述封闭封盖上设有正、 负电极引脚， 所述外壳的内部设有铝箔卷芯， 所述铝箔卷芯的内部设有电解液， 所述铝箔卷芯通过连接线分别与所述正、 负电极引脚相 连通， 所述电容还包括一个减压装置， 所述减压装置用于所述电容的密封， 所述减压装置 还用于改变所述电容的容积使所述电容内外的压力达到平衡。
具体地， 所述减压装置包括设置在所述开口封盖与所述外壳之间的柔性的密封片。 进一步地， 为了压紧所述密封片， 所述开口封盖处的所述密封片与所述外壳之间设有 垫圈， 所述垫圈的硬度小于所述外壳的硬度。
进一步地， 为了增加电容的密封性， 所述减压装置还包括设置在所述封闭封盖与所述 外壳之间柔性的密封片。
进一步地， 为了压紧所述密封片， 使本发明所述电容形成高度密封结构， 所述开口封 盖处的所述密封片与所述外壳之间设有垫圈， 所述封闭封盖处的所述密封片与所述外壳之 间设有垫圈， 所述垫圈的硬度小于所述外壳的硬度。
具体地， 所述减压装置包括设置在所述开口封盖与所述外壳之间的金属膜。
进一步地， 为了增加电容的密封性， 所述减压装置还包括设置在所述封闭封盖与所述 外壳之间柔性的密封片。
进一步地， 为了增加电解液的填充量， 所述铝箔卷芯与所述外壳之间设有空腔， 所述 空腔用于填充电解液。
本发明实施例还提供了另一种高寿命电解电容， 包括内部中空的外壳， 所述外壳的一 端连接着封闭封盖， 另一端开口， 所述封闭封盖上设有正、 负电极引脚， 所述外壳的内部 设有铝箔卷芯， 所述铝箔卷芯的内部设有电解液， 所述铝箔卷芯通过连接线分别与所述正、 负电极引脚相连通， 所述电容还包括一个减压装置， 所述减压装置用于所述电容的密封， 所述减压装置还用于改变所述电容的容积达到所述电容内外的压力平衡。
具体地， 所述外壳的开口端设有上定位卡和下定位卡， 所述减压装置包括设置在所述 上定位卡与所述下定位卡之间的活塞。
本发明实施例提供的技术方案带来的有益效果是： 相比现有技术， 本发明实施例通过 减压装置， 使得所述电容形成了一个密封结构并且根据外壳内外的压力进行减压， 当电容 内部产生蒸气和产生电解气体时， 密封片可扩大容积； 当压力达到一定值时， 由于温度升 高所产生的蒸气和充、 放电放出的气体与回溶的气体可达平衡， 即可达稳定工作状态 （极 微量难溶气体的渗透能力极强， 可通过柔性密封片的构造间隙逸出）； 当电容停止工作或降 温时， 气体可回溶于电解液中， 因此本发明实施例能够有效增加所述电解电容的寿命， 并 保持电容量的稳定。
附图说明
图 1是本发明一实施例所述高寿命电解电容的主剖视图；
图 2是本发明另一实施例所述高寿命电解电容的主剖视图。
图中： 1外壳， 2电解液， 3连接线， 4第一垫圈， 5第一密封片， 6封闭封盖， 6. 1正 电极引脚， 6. 2负电极引脚， 7铝箔卷芯， 8空腔， 9开口封盖， 9. 1开口， 10第二密封片， 11第二垫圈， 12上定位卡， 13下定位卡， 14活塞。
具体实施方式
为使本发明的目的、 技术方案和优点更加清楚， 下面将结合附图对本发明实施方式作 进一步地详细描述。
如图 1所示， 本发明一实施例提供的一种高寿命电解电容， 包括内部中空的外壳 1， 所 述外壳 1的一端连接着封闭封盖 6， 另一端连接着开口封盖 9， 所述封闭封盖 6上设有正电 极引脚 6. 1和负电极引脚 6. 2， 所述外壳 1的内部设有铝箔卷芯 7， 所述铝箔卷芯 7的内部
设有电解液 2， 所述铝箔卷芯 7通过连接线 3分别与所述正电极引脚 6. 1和负电极引脚 6. 2 相连通， 所述电容还包括一个减压装置， 所述减压装置用于所述电容的密封， 所述减压装 置还用于改变所述电容的容积使所述电容内外的压力达到平衡。
具体地， 如图 1所示， 所述减压装置包括设置在所述开口封盖 9与所述外壳 1之间的 柔性的第二密封片 10。 为了增加所述电容的密封性， 所述减压装置还可以包括设置在所述 封闭封盖 6与所述外壳 1之间的柔性的第一密封片 5。
进一步地，为了增加电解液 2的填充量，所述铝箔卷芯 7与所述外壳 1之间设有空腔 8， 所述空腔 8用于填充电解液 2， 使得铝箔卷芯 7的外部也充满了电解液 2， 因此， 本发明所 述电解电容内部加入的电解液 2 较之现有技术中的电解电容多， 使得本发明所述电解电容 8-10年不干枯， 因此， 可有效地延长电解电容的寿命， 尤其是对于工作环境较恶劣的电子 器件， 例如大功率 LED路灯的电源， 其作用尤其显著。
进一步地， 为了压紧所述第一密封片 5和第二密封片 10， 使本发明形成一个高度密封 的结构， 所述第二密封片 10与所述外壳 1之间设有第二垫圈 11， 第一密封片 5与所述外壳 1之间设有第一垫圈 4， 所述第一垫圈 4和第二垫圈 11的硬度均小于所述外壳 1的硬度。
具体地， 外壳 1为耐压外壳。 本例中， 所述外壳 1优选不锈钢外壳。 当然， 本领域技 术人员可知， 所述外壳 1 不限于不锈钢外壳， 只要能够满足耐压功能的任何材质均可， 例 如铝外壳、 尼龙外壳等等。
具体地， 所述垫圈优选为铝垫圈， 在保证垫圈可压縮的同时， 还可消耗一部分铝， 补 偿电解过程中铝箔卷芯 7中铝的消耗。 当然， 本领域技术人员可知， 所述垫圈不限于不铝， 只要能够满足压縮功能的任何金属垫圈均可。
具体地， 所述密封片即第一密封片 5 和第二密封片均优选为乳胶密封片。 当然， 本领 域技术人员可知， 所述密封片不限于乳胶密封片， 可以是任何柔性的密封片， 如硅胶密封 片。
具体地， 作为优选， 所述开口封盖 9的中部设有开口 9. 1， 所述开口封盖 9的开口 9. 1 直径与所述第二垫圈 11的内孔直径相等， 所述开口封盖 9优选采用塑胶制成。
本发明实施例通过上述结构， 使得所述电解电容形成了一个高度密封的结构， 由于开 口封盖 9的开口处与所述外壳 1之间设有柔性的第二密封片 10， 当电容内部产生蒸气和产 生电解气体时， 第二密封片 10可扩大容积； 当压力达到一定值时， 由于温度升高所产生的 蒸气和充、 放电放出的气体与回溶的气体可达平衡， 即可达稳定工作状态 （极微量难溶气 体的渗透能力极强， 可通过柔性密封片的构造间隙逸出）； 当电容停止工作或降温时， 气体 可回溶于电解液 2 中， 因此本发明实施例能够有效增加所述电解电容的寿命， 并保持电容
量的稳定。
参见图 1所示本发明又一实施例， 本实施例与图 1 中所述实施例的区别在于， 本实施 例所述的减压装置为设置在所述开口封盖 9与所述外壳 1之间的金属膜， 其余为相同之处， 本实施例不再赘述。
如图 2所示本发明提供的另一实施例， 所述高寿命电解电容包括内部中空的外壳 1， 所 述外壳 1的一端连接着封闭封盖 6， 另一端开口， 所述封闭封盖 6上设有正电极引脚 6. 1和 负电极引脚 6. 2, 所述外壳 1的内部设有铝箔卷芯 7， 所述铝箔卷芯 7的内部设有电解液 2, 所述铝箔卷芯 7通过连接线 3分别与所述正电极引脚 6. 1和负电极引脚 6. 2相连通， 所述 电容还包括一个减压装置， 所述减压装置用于所述电容的密封， 所述减压装置还用于改变 所述电容的容积使所述电容内外的压力达到平衡。
具体地， 如图 2所示， 所述外壳 1的开口端设有上定位卡 12和下定位卡 13， 所述减压 装置包括设置在所述上定位卡 12与所述下定位卡 13之间的活塞 14。其中， 上定位卡 12与 下定位卡 13之间的距离， 限定了活塞 14的行程。
为了增加所述电容的密封性， 所述减压装置还可以包括设置在所述封闭封盖 6 与所述 外壳 1之间的柔性的第一密封片 5。
进一步地， 为了压紧所述第一密封片 5 使本发明形成一个高度密封的结构， 所述第一 密封片 5与所述外壳 1之间设有第一垫圈 4，所述第一垫圈 4的硬度小于所述外壳 1的硬度。
具体地， 所述垫圈优选为铝垫圈， 在保证垫圈可压縮的同时， 还可消耗一部分铝， 补 偿电解过程中铝箔卷芯 7中铝的消耗。 当然， 本领域技术人员可知， 所述垫圈不限于不铝， 只要能够满足压縮功能的任何金属垫圈均可。
具体地， 所述外壳 1为耐压外壳。 本例中， 所述外壳 1优选不锈钢外壳。 当然， 本领 域技术人员可知， 所述外壳 1不限于不锈钢外壳， 只要能够满足耐压功能的任何材质均可， 例如铝外壳、 尼龙外壳等等。
进一步地，为了增加电解液 2的填充量，所述铝箔卷芯 7与所述外壳 1之间设有空腔 8， 所述空腔 8用于填充电解液 2， 使得铝箔卷芯 7的外部也充满了电解液 2， 因此， 本发明所 述电解电容内部加入的电解液 2 较之现有技术中的电解电容多， 使得本发明所述电解电容 8-10年不干枯， 因此， 可有效地延长电解电容的寿命， 尤其是对于工作环境较恶劣的电子 器件， 例如大功率 LED路灯的电源， 其作用尤其显著。
如图 2所示， 当外壳 1内压力升高时， 活塞 14被推动， 使外壳 1内容积加大， 实现减 压； 当外壳 1内的压力下降是， 活塞 14复位， 因此本发明实施例能够有效增加所述电解电 容的寿命， 并保持电容量的稳定。
以上所述仅为本发明的较佳实施例， 并不用以限制本发明， 凡在本发明的精神和原则 之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。
Claims
1、 一种高寿命电解电容， 包括内部中空的外壳， 所述外壳的一端连接着封闭封盖， 另一 端连接着开口封盖， 所述封闭封盖上设有正、 负电极引脚， 所述外壳的内部设有铝箔卷芯， 所述铝箔卷芯的内部设有电解液， 所述铝箔卷芯通过连接线分别与所述正、 负电极引脚相连 通， 其特征在于， 所述电容还包括一个减压装置， 所述减压装置用于所述电容的密封， 所述 减压装置还用于改变所述电容的容积使所述电容内外的压力达到平衡。
2、 如权利要求 1所述的高寿命电解电容， 其特征在于， 所述减压装置包括设置在所述开 口封盖与所述外壳之间的柔性的密封片。
3、 如权利要求 2所述的高寿命电解电容， 其特征在于， 所述开口封盖处的所述密封片与 所述外壳之间设有垫圈， 所述垫圈的硬度小于所述外壳的硬度。
4、 如权利要求 2所述的高寿命电解电容， 其特征在于， 所述减压装置还包括设置在所述 封闭封盖与所述外壳之间柔性的密封片。
5、 如权利要求 4所述的高寿命电解电容， 其特征在于， 所述开口封盖处的所述密封片与 所述外壳之间设有垫圈， 所述封闭封盖处的所述密封片与所述外壳之间设有垫圈， 所述垫圈 的硬度小于所述外壳的硬度。
6、 如权利要求 1所述的高寿命电解电容， 其特征在于， 所述减压装置包括设置在所述开 口封盖与所述外壳之间的金属膜。
7、 如权利要求 6所述的高寿命电解电容， 其特征在于， 所述减压装置还包括设置在所述 封闭封盖与所述外壳之间柔性的密封片。
8、 如权利要求 1-7任一项权利要求所述的高寿命电解电容， 其特征在于， 所述铝箔卷芯 与所述外壳之间设有空腔， 所述空腔用于填充电解液。
9、 一种高寿命电解电容， 包括内部中空的外壳， 所述外壳的一端连接着封闭封盖， 另一 端开口， 所述封闭封盖上设有正、 负电极引脚， 所述外壳的内部设有铝箔卷芯， 所述铝箔卷 芯的内部设有电解液， 所述铝箔卷芯通过连接线分别与所述正、 负电极引脚相连通， 其特征 在于， 所述电容还包括一个减压装置， 所述减压装置用于所述电容的密封， 所述减压装置还 用于改变所述电容的容积达到所述电容内外的压力平衡。
10、 如权利要求 1所述的高寿命电解电容， 其特征在于， 所述外壳的开口端设有上定位 卡和下定位卡， 所述减压装置为设置在所述上定位卡与所述下定位卡之间的活塞。
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| JP2003282374A (ja) * | 2002-03-25 | 2003-10-03 | Toshiba Corp | 電解コンデンサ |
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| JP2003282374A (ja) * | 2002-03-25 | 2003-10-03 | Toshiba Corp | 電解コンデンサ |
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