03
电气装置
Electrical Installation
12
3.3 旁路二极管和防反二极管
Bypass Diodes And Block
2
在带有两个或多个串联组件的系统中，如果部分组件被遮阳，而其他组件面对太阳，此时一个非常高的反向电流将通过已局部或完
全覆盖的电池，这会造成电池过热，并有可能损坏组件。通过旁路二极管，可以防止组件受到此类风险。接线盒内有旁路二极管，
可以减少局部阴影效应。禁止私拆接线盒更换二极管，甚至是在二极管损坏时也不允许。此类工作应 由专业人员操作。
在配有电池的系统内，如果控制器没有后摆保护功能，那么电池与组件之间安装的防反二极管可以防止反向电流损坏组件。
In a system with two or more Modules connected in series, if part of a Module is shaded while the other part is exposed
to the sun, a very high reverse current will go through the cells which have been partly or entirely covered and it will
cause overheat on the cells, which may damage the Module. Using bypass diodes can protect Modules from this kind of
risk. There are bypass diodes in junction boxes, which can reduce the effects of partial shadows. Do not privately
disassemble the junction box to replace the diodes, even when the diodes are broken. This should be processed by the
professionals.
In a system with batteries, if the controller doesn’t have the function of backswing protection, block diodes installed
between the battery and the Module can prevent the reverse current from damaging the Module.
Object
Manufacturer/trademark
Type
Bypass diode
PanJit International Inc.
Schottky, Type:THY2550
Schottky
Type:SBT3050VDC
Zhejiang Zhonghuan Sunter PV
Technology Co.,Ltd.
Schottky, Type:20SQ045
Yangzhou Yangjie Electronic
Technology Co.,Ltd.
Schottky, Type:GF3045MG
SBT4050DY
GFMK4045C
GFMK6045C
Changzhou Star Sea Electronics
CL.,Ltd
SMK5045D
Zhejiang Chuangyuan Photovoltaic
Technology CO.,Ltd
MK5045D
QC Solar(Suzhou) Corporation
QCMK5045
