Powering the Future: The Crucial Role of Resistors in Electric Vehicle Charging
It’s
no secret. When it comes to vehicles, the future is electric. What once seemed like an elusive luxury is now becoming the standard in
automotive manufacturing. Many automakers are looking to join the likes
of Tesla and have committed to developing more cost-effective EV options
and increasing the size of their EV fleet. For example, Ford has
announced its initiative to produce more than two million electric
vehicles by 2026 and Volkswagen has invested $193 billion into their
plans to support the goal of making every fifth vehicle sold electric by
2025.
With the rise of electric vehicles on the roads comes the need for more charging infrastructure. In 2022, the United States introduced a nearly $5 billion investment into EV charging stations that will be put into place over the next five years. However, building the charging infrastructure is only part of the challenge – reducing the amount of time to fully charge is the other.
There are currently three charger types and speeds:
Level
1 chargers are commonly found in residential areas with a 120-volt AC
outlet. For Battery Electric Vehicles (BEV), it can take 40-50+ hours to
charge from empty to 80%. Plug-in Hybrid Electric Vehicle (PHEV) can
take 5-6 hours.
Level 2 offers higher-rate AC charging through 240V in residential applications or 208V in commercial applications. This is the common equipment for homes and public charging stations.
Direct Current Fast Charging (DCFC) offers rapid charging at heavy-traffic stations such as grocery stores and gas stations, with 400 V to 1000 V DC, and 20 minutes to one hour for a full BEV Charge.
No matter the charging speed, a critical element of the charging process is regulating the heat generated due to the battery charging current. Failure to regulate the heat can cause the battery to overheat and potentially result in catastrophic failure or fire. This is where Resistors come in.
Current Sense Resistors are a reliable and cost-effective solution for current control, which in turn controls the generation of heat in the vehicle battery while charging. One manufacturer, TT Electronics, has a wide range of current sense resistors that can be utilized in battery management systems.
“It is, of course, critical to have the right resistor technology, rating, and value,” said Stephen Oxley of TT Electronics. “But what is sometimes less understood is the need to consider secondary factors – like reliability, surge performance and consistency, and safety in the event of excessive overload.”
As accessibility to EV charging has increased, charging stations have begun to pop up everywhere, including gas stations and popular destinations on major highways, which are often exposed to the elements. This is where Wire wound resistors come in.
“Wire wound resistors in ceramic cases, like TT Electronics’ AEC-Q200 qualified WPRT Series, were once used only in industrial applications,” said Oxley. “But these resistors have found a new lease on life in battery management systems for electric vehicles due to their high surge and overload tolerance, safe and flameproof construction, and high reliability.”
Wire wound resistors offer critical transient protection from hazardous surges caused by lightning strikes, where up to 14,000-volt surges can occur. According to Oxley, TT Electronics’ axial leaded power wire wound resistors have been developed to meet these demanding specifications.
“In addition to standard products, TT Electronics has the unique flexibility to provide custom solutions that meet the specific requirements of applications,” said Oxley. “With the EV landscape rapidly evolving, it can be tricky for designers to select the right resistor for their applications, something with which TT Electronics can certainly help.”
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Resistors for Battery Management Systems
With an industry-tested catalog of advanced resistors, TT Electronics is prepared to take your BMS to the next level. EBW8518 resistors have a continuous power rating of 36W with overload protection up to 180W for five-second surges. LRMAP3920/LRMAP5930 power resistors are suitable for fast and high surges (up to 50W for five-second overloads).LRMA/ULR resistors have proven instrumental in consumer markets.WPRT and PWHW resistors are suitable for an extremely broad range of applications.WDBR resistors are the element of choice when it comes to compact pulse withstanding solutions.
TT Electronics Welwyn电阻选型表
TT Electronics Welwyn电阻选型，包括精密电阻、金属合金功率电阻、电流检测电阻、MELF电阻、线绕高浪涌电阻、通用表面安装电阻等，提供多参数选择，最小尺寸达0204，最小电阻值达0.2mΩ，公差范围±0.01%~±10%
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Size
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Value(mΩ、Ω)
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Tolerance(%)
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HR0603F-100MJI
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选型表 - TT Electronics 立即选型
CURRENT SENSE RESISTORS - Application Note
型号- OAR,4LPW,WMHP20,OAR-5,2504,LRF3W,OAR5,LR(F),PLO,OARS-XP,CSL-5,OAR1,LRCS,OAR3,ULR,EBW,OAR-1,CSL,OAR-3,LOB,LR2512,WSMHP35,PWRL,LR1206,LR2010,W31,LRMA,OARS-1
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WH Series Resistors Aluminium Housed Wirewound Resistors
型号- WH SERIES,WH50T,WH50,WH5,WH300,WH200,WH100,WH25T,WH25-3K3JI CECC40203-006 CA,WH25-100RJI,WH25□□-100RJI□,WH10,WH25
厚声（Uni-Royal）电阻选型指南（详细版）
目录- Company Profile（公司介绍） Thick Film Surface Mount Chip Resistors（厚膜表面贴装晶片电阻） Thick Film Surface Mount Lead Free Chip Resistors（厚膜表面贴装无铅晶片电阻） Thin Film Type Surface Mount Chip Resistors（薄膜类表面贴装晶片电阻） Current Sensing Chip Resistors（电流检测晶片电阻器） AEC-Q200 Relevant Provision Resistor（AEC-Q200相关条款电阻器） Array-Convex Terminal & Network Resistors（排列&网络电阻） Through Hole Category-Film Resistors（插件类-膜层电阻） Through Hole Category-Wire-wound Resistors（插件类-绕线电阻） Through Hole Category-Special type &Forming process Resistors（插件类-特殊型别&成型加工电阻） Thick Film Printing Through Hole Category-Network Resistors（厚膜印刷插件类-网络电阻） Through Hole Category-Traditional Cement Resistors（插件类-水泥电阻） Cement Power Type Resistors（水泥功率型电阻） Custom Resistors-Automotive（定制型电阻-汽车类） Custom Resistors-Power Supply, Industrial Control（定制型电阻-电源，工控类） Test Methods and Explanation（测试方法和注释） Resistor material（电阻材料）
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11W,PRWD,CGO,4DP3,PRWC,CS121WJ022LT4E,KNP01S,RC06-1,PRWI,PRWL,PRWH,RS30,HFWR,PRTD10W,HBWR200W,PRWS,PRVB-5W,QL600W,PRWP,HFR007,HCWR80J0500B00,PFAP,E-96系列,KNP08W,E-12,PFAT,PRZA,PFAS,PRZA-2 3 W,MS系列,NS SERIES,KNP09S,HPWR220W,PRW0AW,MGC32580104204,PHF1 17W,PRT40W,KNP07W,KNP03SJ0120A10,WR系列,LR系列,KNHW18W,10S8,KNP08S,QH30W,RWC SERIES,MPR03WJ****A*0,QHO017K0400B00,PRZA-1/20W,4C02,4C03,HEWR4000W,PRWI 11W,10T8,KNP07S,PRTC20W
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TT Electronics （TT）电阻器选型指南
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品牌：TT Electronics
品类：Wirewound Power Radial Terminal Resistors
价格：￥7.1649
现货：814
品牌：TT Electronics
品类：Wirewound Power Radial Terminal Resistors
价格：￥16.0569
现货：42
品牌：TT Electronics
品类：Wirewound Power Radial Terminal Resistors
价格：￥17.9550
现货：7
服务
可定制均温板VC最薄0.4mm，有效导热系数超5,000 W / m·K（纯铜(401 W/m·K ，石墨烯1,200 W/m·K）。工作温度范围同时满足低于-250℃和高于2000℃的应用，定制最低要求，项目年采购额大于10万人民币，或采购台套数大于2000套。
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可定制ATD TE Dehumidifier的冷却功率：20~220W；工作电压：12V(DC)/ 220V(AC)；控温精度：≤±0.5℃；尺寸：冷面：20*20~500*300；热面：60*60~540*400(长*宽;单位mm）。
最小起订量： 1 提交需求>
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