捷捷微电新能源汽车充电桩应用案例

Release time:2023-05-09
author:AMEYA360
source:网络
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  充电桩功能类似于加油站里面的加油机,可以固定在地面或墙壁,安装于公共建筑(公共楼宇、商场、公共停车场等)和居民小区停车场或充电站内,可以根据不同的电压等级为各种型号的电动汽车充电。充电桩的输入端与交流电网直接连接,输出端都装有充电插头用于为电动汽车充电。

捷捷微电新能源汽车充电桩应用案例

  充电桩目前分为交流充电桩和直流充电桩。交流桩输出单相/三相交流电通过车载充电机转换成直流电给车载电池充电,功率一般较小(有 7kW、22kW、40kW 等功率),充电速度一般较慢,故一般安装在小区停车场等地。直流充电桩(或称非车载充电机)则是直接输出直流电给车载电池进行充电,功率较大(有 60kW、120kW、200kW 甚至更高),充电速度较快,故一般安装在高速公路旁的充电站。

捷捷微电新能源汽车充电桩应用案例

  电网中的交流电通过交流充电桩直接给车载充电器 (OBC) 供电,OBC 把 AC 转换成 DC,然后通过配电箱为车内的动力电池充电。直流充电桩则包含许多 AC-DC 电源模块。从目前充电桩市场的状况来看,有 3 大趋势:宽范围的恒定功率、宽范围的输出电压、更高功率的模块。

  两个主要功率级。首先,功率因素校正 (PFC) 级,保持输入电流和电压之间的相位关系,最大限度地减少线路/电网电流的总谐波失真 (THD) 。这有助于减少任何浪费的无功功率,提高整体能效。

  第二功率级是 DC-DC 转换器,它从 PFC 级获得 DC 输出,并将其转换为电池充电所需的电平。转换器的输出电压和电流基于电池的整体健康状态和充电状态随时间变化。

  不论是功率因数校正(PFC)、原边侧 DC-DC、或二次整流,捷捷微电都具有相应的解决方案,汽车系列产品涵盖二极管、MOSFET、TVS 等各类产品。比如:整流+LLC 构成了充电桩的基本电路,可采用 FRED(快恢复二极管)方案;CAN 通讯口的 ESD 保护。


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