Datasheet

使用指南 Application Guidelines
- 6 -
Index
EDLC建議最大充電電流I應按以下方式計算，Vw為充電電壓，R為EDLC ESR：
I = Vw/5R
持續大電流或高電壓充電，EDLC將會過度發熱。過度發熱將會導致ESR提升，氣體產生，壽命縮
短，漏液，防爆閥破裂。如果要使用高於額定值的電流或電壓充電請與生產廠商聯系。
The maximum recommended charge current I, for an EDLC where Vw is the charge voltage and R is the EDLC
ESR is calculated as below:
I = Vw/5R
Overheating of the EDLC can occur from continuous overcurrent or overvoltage charging. Overheating can
lead to increased ESR, gas generation, decreased life time, leakage, venting or rupture. Contact the factory if
you plan to use a charge current or voltage higher than specified.
自放電與漏電流 Self Discharge and Leakage Current
以不同方法進行測量時自放電和漏電流在本質上是相同的，因為EDLC在搆造上，從正極到負極具
備高的耐電流特性。也即是說為保留電容電荷，需要少量的額外電流，此稱為漏電流。當充電電壓
移除，電容不在負荷時，額外的電流會促使EDLC放電，此稱為自放電電流。
Self discharge and leakage current are essentially the same thing measured in different ways. Due to the EDLC
construction, there is a high-resistance internal current path from the anode to the cathode. This means that in
order to maintain the charge on the capacitor a small amount of additional current is required. During charging
this is referred to as leakage current. When the charging voltage is removed, and the capacitor is not loaded,
this additional current will urge the EDLC to discharge and is referred to as the self discharge current.
為測量實際的漏電流或自放電數值，因搆造原因，EDLC須充電100小時以上。EDLC可模擬為几個
并聯的電容器，每一個都有不同的串聯電阻值。低串聯電阻值的電容器能迅速充電從而提升終端電
壓達到充電電壓值的同一水平。但在充電電壓移除時，如果這些并聯的電容器之中有未完全充電的
話，電容器將會放電到具有較高串聯電阻的并聯電容器中。結果就是終端電壓將會降低，形成高自
放電電流。須注意容量越高，完全充電時間就越久。
In order to get a realistic measurement of leakage or self discharge current the EDLC must be charged for
an excess of 100 hours. This is also due to the capacitor construction. The EDLC can be modeled as several
capacitors connected in parallel, each with an increasing value of series resistance. The capacitors with low
values of series resistance are charged quickly thus increasing the terminal voltage to the same level as the
charge voltage. However, if the charge voltage is removed these capacitors will discharge into the parallel
capacitors with higher series resistance if they are not fully charged. The result of this is that the terminal
voltage will fall, giving the impression of high self discharge current. It should be noted that the higher the
capacitance value is, the longer it will take for the device to be fully charged.