【选型】车规级高压保险丝LC HEV应用车载OBC,输入输出端口保护安全可靠
车载充电机(OBC)是指固定安装在电动汽车上的充电机,具有为电动汽车动力电池,安全、自动充满电的能力,充电机依据电池管理系统(BMS)提供的数据,能动态调节充电电流或电压参数,执行相应的动作,完成充电过程 。
图1 车载OBC框图
混合动力和电动汽车的电池可以通过车载充电机从标准电源插座或者直接从汽车外部覆盖的直流电源桩充电。设计上的挑战包括防止过流、过压和ESD。LITTELFUSE可以提供高压保险丝、压敏电阻、GDTs、开关晶闸管、TVS和二极管阵列来解决这些系统安全问题。本文主要介绍Littelfuse 高压保险丝在OBC输入输出端口的保护作用。
按照目前市面主流OBC功率3.3kW /6.6kW设计,对于输入输出端口过流保护功能要求:
图2 OBC输入输出端口熔断器需求
一、AC输入端口:
(1)AC输入电压一般为110VAC或者220VAC单相输入,要求保险丝工作电压最低可达275VAC,额定工作电流可到50A以内;
(2)需要熔断器具有较高的分断能力,能应对电涌瞬态冲击以及热循环冲击。
(3)满足车规级要求。
二、输出端口:应对由于OBC或电池组故障或外部事件(如车祸)导致的危险短路情况。
(1)工作电压满足450VDC要求,额定电流要求达到10A到30A/40A;
(2)熔断器具有较高的分断能力;
(3)满足车规级要求 。
针对上述OBC输入输出端口对于保险丝需求,推荐Litteluse 高电压低电流熔断器LC HEV系列,450VDC工作电压,电流等级包含10A/15A/20A/30A/40A,覆盖不同功率段需求。
图3 Littelfuse LC HEV系列熔断器
Littelfuse LC HEV系列熔断器在OBC上应用,具有以下优势:
(1)LC HEV分断能力达到10kA,能保证输入输出端口安全可靠,不出现起火拉弧现象;
Interrupting Rating (10A, 15A, 20A, 30A): 10kA @ 450 VDC I
nterrupting Rating (40A): 10kA @ 425 VDC
(2)多种安装方式可选:盒式安装、螺拴、刀片式以及PCB焊接式安装方式;
(3)满足车规级要求,符合ISO8820-8认证要求。
图4 LC HEV系列选型表
另Littelfuse 可提供更多关于汽车电子保护方案,具体可见平台【Littelfuse(力特)汽车电子用户指南】。
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目录- AUTOMOTIVE FUSES Product introduction BLADE FUSES CARTRIDGE FUSES HIGH CURRENT FUSES SMD FUSES CABLE/PAL FUSES HIGH VOLTAGE FUSES Shunts/Diodes/Resistors Fuse General knowledge
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型号- 20EV080.ZXBDMC,20EV125.ZXBDMC,20EV150.ZXBDMC,20EV060.ZXBDMC,20EV,20EV070.ZXBDMC,20EVXXX.ZXBDMC,20EV100.ZXBDMC,20EV SERIES
314 Series 314/324 Series Lead-free 3AB, Fast-Acting Fuse Axial Lead & Cartridge Fuses
型号- 0314XXXXMXP,0324004.MXP,0314015.MX280P,324 SERIES,0324005.MXP,346 SERIES,345 SERIES,0314001.MXP,0314010.MX280P,0314.500MXP,0314010.MXP,0324015.MXP,0324040.MXP,0314007.MXP,0324002.MXP,101 SERIES,0314.750MXP,0314008.MXP,0314025.MXP,0324003.MXP,0324020.MX280P,0324020.MXP,0324015.MX280P,0314030.MXP,0314012.MXP,0324.375MXP,324 000P,0314.375MXP,0314020.MX280P,314 SERIES,0314005.MXP,0314025.MX280P,0314020.MXP,0324.500MXP,354 SERIES,0324001.MXP,0314006.MXP,359 SERIES,0314002.MXP,155100,0324010.MXP,0324.750MXP,0314040.MXP,0314015.MXP,0324007.MXP,314 000P,0324006.MXP,122 SERIES,0324010.MX280P,0314003.MXP,0324030.MXP,0324008.MXP,0324025.MXP,0314004.MXP,0324025.MX280P,0324012.MXP
电安科技熔断器HV741A250M36E成功应用于PCS的短路保护上
华东某PCS客户,有个100KW PCS项目的DC端设计电压950VDC左右,设计额定电流170A左右,需要在DC正负端串熔断器,用于短路保护,分断要求30KA以上。给客户推荐了电安科技HV741A250M36E,其电流由25-250A可选,耐压1000V,分断能力50KA,符合客户应用要求。符合RoHS环保要求。目前已经在客户项目上测试通过,小批试产。
产品 发布时间 : 2024-08-31
10EV Series High Voltage Fuses – Rated 500 V DC Datasheet
型号- 10EV015.XXX,10EV040.XXX,10EV,10EV030.XXX,10EV010.XXX,10EV020.XXX,10EVXXX.ZXPY,10EVXXX.ZXBDP,10EV SERIES,10EVXXX.ZXPCB,10EVXXX.ZXPCBL,10EVXXX.ZXC,10EV050.XXX,10EVXXX.ZXISO
【应用】电安科技小尺寸高压陶瓷插件保险丝HV323-A040P2成功应用于OBC的短路保护上
有个便携式6.6KW的OBC,输入电压100-240Vac,考虑到用户家里一般都有空开,所以没有串保险丝,在250-900VDC输出端,平时设计电流16A,需要选一个40A 1000VDC的尽量尺寸小,价格有优势的熔断器,做输出短路保护,分断要求20KA。给客户推荐了我们14x39mm的高压陶瓷插件保险丝HV323-A040P2。
应用方案 发布时间 : 2024-07-11
【技术】解析半导体保险丝——一种暗藏诸多门道的高速熔断器
在熔断器类目中一种特殊的产品,叫高速熔断器,又叫半导体保险丝,是开发应用于半导体电路过流保护的器件。本文中Littelfuse将为大家解析高速熔断器。
技术探讨 发布时间 : 2023-02-11
30EV Series High Voltage Fuses – Rated 500 V DC Datasheet
型号- 30EV250.ZXBDM,30EV SERIES,30EV150.ZXBDM,30EV200.ZXBDM,30EV,30EV175.ZXBDM,30EVXXX.ZXBDM,30EVXXX.ZXBDM-M6,30EV225.ZXBDM,30EV300.ZXBDM
【产品】500Vac/450Vdc,10A~800A的圆柱形高速熔断器L50S系列
L50S系列是Littelfuse(力特)公司推出的圆柱形高速熔断器,其通过使用先进的冶金,聚合物和材料研究,数学建模和计算机统计分析,重新定义了高速熔断器技术,该技术为未来的准确性,稳定的质量,可靠性和可预测的性能设定了标准。
新产品 发布时间 : 2019-01-15
POWR-SPEED® 系列高速熔断器
型号- PSC,MS7V,A70P,A70Q,170H,A50P,A50Q,QS系列,MS3V,L50QS,L70QS,A70QS,A50QS,MS7H,A_UD,170M,FWH,PSR系列,FFWP,PC_UD,MS3H
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可定制高压电源模块的输入电压100VDC-2000VDC、功率范围5W-500W/4W-60W; 高压输出电源模块的输出电压100VDC-2000VDC。功率范围:4W-60W。
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可根据用户端子定制线束,制程能力:Min: 0.13mm2、Max: 120mm2;具有设计方案验证、定案、样品交付及量产快速响应能力。
最小起订量: 1000pcs 提交需求>
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