液冷充电电缆：MCS（兆瓦充电系统）vs. CCS2 — 电动矿用卡车快充电缆要求
Cable requirements for fast-charging electric mining trucks — a professional analysis of conductor sizing, thermal management, insulation materials, and applicable international standards.
Liquid Cooled Charging Cables: MCS vs. CCS2 液冷充电电缆：MCS（兆瓦充电系统）vs. CCS2 — 电动矿用卡车快充电缆要求
Cable requirements for fast-charging electric mining trucks — a professional analysis of conductor sizing, thermal management, insulation materials, and applicable international standards.
1. Introduction to High-Power Charging 大功率充电概述
The electrification of heavy-duty vehicles — particularly mining haul trucks, long-haul freight vehicles, and electric buses — demands charging infrastructure capable of delivering power levels far beyond those required by passenger electric vehicles. While a typical passenger EV charger operates at 50–350 kW, a battery-electric mining truck with a 600+ kWh battery pack may require charging power in the range of 600 kW to over 7.5 MW to minimize downtime and maintain mine productivity.
（重型车辆的电气化——特别是矿用自卸卡车、长途货运车辆和电动公交车——需要能够提供远超乘用电动车所需功率水平的充电基础设施。典型的乘用车充电器功率为50–350 kW，而电池电动矿用卡车可能需要600 kW至超过7.5 MW的充电功率。）
Two charging interface standards are central to this discussion: the Combined Charging System Type 2 (CCS2), which is already widely deployed for commercial EVs at up to 500 kW, and the Megawatt Charging System (MCS), a next-generation standard being developed by the CharIN association and standardized through SAE J3271 and IEC 63379, designed for charging at up to 3.75 MW. Both systems increasingly rely on liquid-cooled cable assemblies to manage the extreme thermal loads generated at high current levels.
2. MCS (Megawatt Charging System) Overview 兆瓦充电系统概述
The Megawatt Charging System (MCS) was initiated by CharIN in 2018 as a task force to develop a high-power charging connector and system architecture for heavy-duty commercial vehicles. The MCS connector features a distinctive triangular pin layout and is rated for a maximum of 3,000 A at 1,250 V DC, enabling peak charging power of 3.75 MW. The standard has been formally published as SAE J3271 (published March 2025) and is being developed in parallel as IEC 63379.
（兆瓦充电系统（MCS）由CharIN于2018年发起，旨在为重型商用车辆开发大功率充电连接器和系统架构。MCS连接器采用独特的三角形引脚布局，额定最大电流为3,000 A，电压为1,250 V DC，峰值充电功率达3.75 MW。该标准已正式发布为SAE J3271。）
Key MCS System Specifications MCS系统关键规格
| Parameter 参数 | Specification 规格 | Notes 备注 |
|---|---|---|
| Max. Voltage最大电压 | 1,250 V DC | System design voltage per CharIN specification |
| Max. Current最大电流 | 3,000 A (peak) | Continuous ratings vary by implementation (e.g., ABB: 1,500 A continuous) |
| Max. Power最大功率 | 3.75 MW | Peak theoretical; practical deployments currently at 1.0–1.2 MW |
| Cooling冷却方式 | Liquid-cooled (mandatory) | Required at currents above ~500 A for cable weight and flexibility |
| Cable Length电缆长度 | ≤ 15 m (recommended) | CharIN recommends shortest possible length to reduce cooling load |
| Communication通讯协议 | ISO 15118-20 over 10BASE-T1S Ethernet | Differential PLC; supports V2G, Plug & Charge |
| Short-Circuit Rating短路额定值 | 11 MA²s | Per CharIN Whitepaper v1.0 cable requirements |
| Primary Standard主要标准 | SAE J3271 / IEC 63379 | SAE J3271 published March 2025; IEC 63379 in development |
Pilot MCS charging stations are already operational in Europe. In the German HoLa project, ABB chargers have successfully charged a Mercedes-Benz eActros 600 at 1,250 A and 1,000 kW. In Sweden, the E-Charge project is deploying MCS chargers by Kempower and ABB along major logistics corridors with trucks from Scania and Volvo. Shell has also opened a public truck fast-charger with both CCS and MCS at its ETCA campus in Amsterdam.
（MCS试点充电站已在欧洲运营。在德国HoLa项目中，ABB充电器已以1,250 A和1,000 kW成功为奔驰eActros 600充电。瑞典的E-Charge项目正在主要物流走廊沿线部署MCS充电器。）
3. CCS2 High-Power Charging Overview CCS2大功率充电概述
The Combined Charging System Type 2 (CCS2) connector is based on the IEC 62196 Type 2 AC connector extended with two DC contacts. CCS2 is the dominant fast-charging standard in Europe and is widely used globally. For DC fast charging, CCS2 supports a maximum of 1,000 V DC and 500 A, enabling up to 500 kW of charging power. With the latest liquid-cooled CCS2 cables from manufacturers like Phoenix Contact, charging powers up to 1 MW in boost mode have been achieved while remaining within the CCS connector standard.
（组合充电系统2型（CCS2）连接器基于IEC 62196 Type 2交流连接器，增加了两个直流触点。CCS2支持最大1,000 V DC和500 A的直流快充，可实现高达500 kW的充电功率。凭借最新的液冷CCS2电缆，在升压模式下已实现高达1 MW的充电功率。）
CCS2 DC Charging Specifications CCS2直流充电规格
| Parameter 参数 | Standard Rating 标准额定值 | HPC Liquid-Cooled 液冷大功率 |
|---|---|---|
| Max. Voltage最大电压 | 1,000 V DC | 1,000 V DC |
| Max. Current最大电流 | 200 A (non-cooled, Ed.1) | 500–600 A continuous; 1,000 A boost |
| Max. Power最大功率 | 200 kW (non-cooled) | 500 kW standard; up to 1 MW boost |
| Cooling冷却方式 | None required (≤200 A) | Liquid-cooled (water-glycol or silicone oil) |
| Cable Conductor电缆导体 | 70–95 mm² (non-cooled) | 35–50 mm² (with liquid cooling) |
| Primary Standard主要标准 | IEC 62196-3:2022 / IEC TS 62196-3-1 (high-power DC coupler requirements) | |
Phoenix Contact’s second-generation CHARX connect professional liquid-cooled CCS charging connector represents the state of the art, using a water-glycol cooling medium rather than transformer oil for environmental compatibility. The four-wire measurement technology integrated in their cables enables precise power dissipation recording. The exchangeable mating face allows contact replacement without draining coolant — a critical feature for fleet depot environments.
（菲尼克斯电气第二代CHARX connect专业液冷CCS充电连接器代表了最先进水平，使用水-乙二醇冷却介质而非变压器油，具有环境兼容性。其集成的四线测量技术可精确记录功耗。）
4. MCS vs. CCS2 — Technical Parameter Comparison MCS与CCS2技术参数对比
The following table provides a direct side-by-side comparison of the two charging systems as they relate to cable engineering requirements for heavy-duty and mining vehicle applications.
| Parameter 参数 | CCS2 (Liquid-Cooled HPC) | MCS |
|---|---|---|
| Rated Voltage额定电压 | ≤ 1,000 V DC | ≤ 1,250 V DC |
| Rated Current (continuous)额定电流（持续） | 500–600 A | 1,500–3,000 A |
| Peak Charging Power峰值充电功率 | 500 kW (1 MW boost) | 3.75 MW |
| Conductor Cross-Section (approx.)导体截面积（近似） | 35–50 mm² (liquid-cooled) | 120–300 mm² per phase (liquid-cooled) |
| Cooling Requirement冷却需求 | Required above 200 A | Mandatory for all implementations |
| Coolant Type冷却介质类型 | Water-glycol or silicone oil | Water-glycol or silicone oil |
| Recommended Cable Length推荐电缆长度 | ≤ 5 m typical | ≤ 15 m (CharIN recommendation) |
| Connector Design连接器设计 | IEC 62196 Type 2 + DC pins | Triangular MCS connector |
| Communication Protocol通讯协议 | PLC per ISO 15118 (single-ended) | 10BASE-T1S Ethernet / ISO 15118-20 (differential) |
| Manual Handling人工操作 | Yes (ergonomic, lightweight) | Yes (designed for driver use without automation) |
| Automation Potential自动化潜力 | Limited | Future automated connection option planned |
| Maturity成熟度 | Fully deployed; widespread infrastructure | Pilot phase; SAE J3271 published 2025 |
| Target Application目标应用 | Passenger EVs, buses, light trucks, depot charging | Heavy-duty trucks (Class 6–8), mining, marine, aviation |
（两个系统在可预见的未来将共存。CCS2仍然最适合场站和夜间充电。MCS专为途中和现场快充设计。斯堪尼亚计划从2026年中起提供同时配备MCS和CCS2连接器的纯电动车。）
5. Cable Construction & Material Requirements 电缆结构与材料要求
The construction of liquid-cooled charging cables is significantly more complex than conventional EV cables. A typical liquid-cooled cable assembly contains multiple functional layers within a single outer sheath, including power conductors, cooling channels, signal wires, shielding, ground conductors, and structural reinforcement.
5.1 Conductor Design 导体设计
Both MCS and CCS2 liquid-cooled cables use high-purity stranded copper conductors (Class 5 or Class 6 flexible conductor per IEC 60228) to ensure low electrical resistance and sufficient flexibility for manual handling. The conductor diameter for each strand is typically 0.5 mm, with resistivity not exceeding 192 mΩ/m at 20°C for a single strand. The key difference lies in the conductor cross-sectional area: CCS2 liquid-cooled cables typically use 35–50 mm² conductors for 500 A continuous, while MCS cables require 120–300 mm² per conductor to support currents of 1,500–3,000 A.
（MCS和CCS2液冷电缆均使用高纯度绞合铜导体（IEC 60228规定的5类或6类柔性导体）。CCS2液冷电缆通常使用35–50 mm²导体用于500 A持续电流，而MCS电缆需要120–300 mm²的导体截面积来支持1,500–3,000 A的电流。）
5.2 Insulation Materials 绝缘材料
Insulation selection is critical for both safety and thermal performance. The primary insulation materials used in high-power liquid-cooled charging cables include cross-linked polyethylene (XLPE), silicone rubber, thermoplastic elastomers (TPE), and thermoplastic polyurethane (TPU) for the outer sheath. The insulation must withstand continuous operating temperatures of 90–200°C, demonstrate excellent oil resistance (particularly for oil-cooled designs), and meet flame-retardant classifications (typically VW-1 or better). Insulation resistance must exceed 100 MΩ at 500 V DC, and withstand voltage testing must reach ≥ 3.0 kV AC for 60 seconds.
（绝缘选择对安全和热性能至关重要。主要绝缘材料包括交联聚乙烯（XLPE）、硅橡胶、热塑性弹性体（TPE）和热塑性聚氨酯（TPU）。绝缘电阻须超过100 MΩ（500 V DC下），耐压测试须达到≥3.0 kV AC持续60秒。）
| Material 材料 | Temp. Range 温度范围 | Key Properties 关键特性 | Typical Use 典型用途 |
|---|---|---|---|
| XLPE交联聚乙烯 | -40°C to +120°C | Excellent dielectric strength, moisture resistance, mechanical strength | Primary conductor insulation |
| Silicone Rubber硅橡胶 | -60°C to +200°C | Superior heat resistance, high flexibility, wide temperature range | High-temperature zones near connectors |
| TPE热塑性弹性体 | -50°C to +125°C | Good flexibility, recyclable, abrasion resistant | Conductor insulation, inner sheath |
| TPU热塑性聚氨酯 | -40°C to +100°C | Excellent abrasion/tear resistance, UV resistant, oil resistant | Outer sheath / jacket |
5.3 Internal Cable Architecture 电缆内部结构
A liquid-cooled DC charging cable typically contains nine or more internal wires within the outer sheath: one DC+ power conductor, one DC– power conductor (both with integrated cooling channels), one PE ground wire, and six or more signal wires for communication, temperature monitoring (PT1000 or NTC sensors), and proximity/control pilot signals. The DC+ and DC– conductors are each paired with coolant inlet and outlet channels, forming a closed-loop thermal management circuit.
（液冷直流充电电缆的外护套内通常包含九根或更多内部导线：一根DC+电力导体、一根DC–电力导体（均集成冷却通道）、一根PE接地线，以及六根或更多信号线用于通讯、温度监测和控制导引信号。）
6. Liquid Cooling System Design 液冷系统设计
Liquid cooling is the enabling technology that allows high-power charging cables to remain lightweight, flexible, and manually operable while carrying currents of 500–3,000 A. Without liquid cooling, a cable rated for 500 A would require conductor cross-sections of 95 mm² or more, making it prohibitively heavy and rigid for manual use.
6.1 Cooling Architectures 冷却架构
| Architecture 架构 | Description 说明 | Advantages 优点 | Limitations 局限 |
|---|---|---|---|
| Central Tube中心管式 | Cooling tube at cable center; conductors arranged around it | Direct contact with heat source; compact design | Limited surface area for heat exchange |
| Surround环绕式 | Coolant channels surround conductor and insulation | Full-contact cooling; high efficiency | More complex manufacturing; larger diameter |
| Separated分离式 | Independent cooling sections for different cable zones | Zone-specific thermal control; suitable for long cables | Higher cost; more connection points |
| Flat Channel扁平通道式 | Flat-profile cooling channel with larger heat dissipation area | 6.9°C lower core temp vs. circular (at 0.5 m/s flow rate) | Requires specialized tooling |
6.2 Coolant Selection 冷却介质选择
Two primary coolant categories are used in liquid-cooled EV charging cables. Oil-cooled (dimethyl silicone oil) systems allow the coolant to directly contact the conductor terminals, providing superior heat transfer efficiency, but the silicone oil is not biodegradable. Water-cooled (water + ethylene glycol) systems require the coolant to be structurally separated from the conductors due to the electrical conductivity of water, using a “copper-hugging” water structure where heat exchange relies on thermally conductive intermediate materials. European regulations increasingly favor biodegradable water-glycol solutions. Phoenix Contact, for example, has specifically adopted water-glycol rather than transformer oil for environmental and maintenance reasons.
（液冷EV充电电缆使用两种主要冷却介质：油冷（二甲基硅油）和水冷（水+乙二醇）。欧洲法规越来越倾向于使用可生物降解的水-乙二醇溶液。菲尼克斯电气出于环保和维护原因特别采用了水-乙二醇。）
7. Application: Electric Mining Trucks 应用：电动矿用卡车
Mining represents one of the most demanding applications for high-power charging cables. Electric haul trucks operate in harsh environments with extreme temperatures (-30°C to +55°C), dust, moisture, vibration, and the need for rapid turnaround times. The charging infrastructure must withstand these conditions while delivering megawatt-level power to minimize asset downtime.
7.1 Mining-Specific Charging Requirements 矿业专用充电要求
Stäubli’s QCC-5000 Quick Charging Connector system, designed specifically for the mining industry, has achieved an industry-leading 7.5 MW of charging power with up to 4,250 A continuous current and 5,000 A peak at 1,500 V DC. The system follows the SAE J3105/3 standard for automated charging connections. ABB’s eMine™ FastCharge provides fully automated charging at up to 600 kW in its current release, with higher power capabilities planned. Both systems emphasize automated connection (no driver exit from cab required) and IP55/IP56 ingress protection for dust and water resistance in mining environments.
（史陶比尔的QCC-5000快速充电连接器系统专为矿业设计，已实现行业领先的7.5 MW充电功率，持续电流高达4,250 A，峰值5,000 A，电压1,500 V DC。ABB的eMine™ FastCharge提供高达600 kW的全自动充电。）
| Requirement 要求 | CCS2 (Depot / Auxiliary) | MCS (On-Route Fast) | Mining Ultra-High Power |
|---|---|---|---|
| Power Level功率等级 | 200–500 kW | 600 kW – 3.75 MW | 1.5–7.5 MW |
| Current Range电流范围 | 200–500 A | 1,000–3,000 A | 2,000–5,000 A |
| Conductor Area导体截面积 | 35–95 mm² | 120–300 mm² | 2 × 300 mm² per pole |
| Cooling冷却 | Liquid or natural | Liquid (mandatory) | Liquid (heavy-duty, cooled pin) |
| IP Rating防护等级 | IP54–IP55 | IP54–IP55 | IP55–IP56 |
| Operating Temp.工作温度 | -30°C to +50°C | -30°C to +55°C | -30°C to +55°C (with derating) |
| Connection Type连接方式 | Manual | Manual / Semi-auto | Fully automated (SAE J3105/3) |
| Cable Weight Handling电缆重量管理 | Hand-held (<5 kg) | Hand-held with support | Crane/robot assisted (~55 kg / 120 lbs) |
| Mating Cycles插拔次数 | 10,000+ | 10,000+ | 3,000+ (heavy-duty, automated) |
Research from Medatech Engineering (2025) on underground electric haul trucks found that fast charging at 600 kW with a 228 kWh battery pack is economically superior to battery swapping, costing 65% less over a five-year period despite providing only 2.8% less productivity than swapping with the largest feasible battery (348 kWh). This underscores the critical role of high-quality, reliable charging cables in mine electrification economics.
（Medatech Engineering（2025年）的研究发现，以600 kW快充228 kWh电池组在五年内比换电方案成本低65%。这凸显了高质量、可靠充电电缆在矿山电气化经济中的关键作用。）
8. Applicable Standards & Certifications 适用标准与认证
| Standard 标准 | Scope 范围 | Relevance 相关性 |
|---|---|---|
| IEC 62196-3:2022 | DC charging connectors and vehicle couplers | CCS2 connector requirements |
| IEC TS 62196-3-1 | High-power DC couplers: thermal sensing, cooling, silver-plated contacts | Liquid-cooled CCS2 HPC requirements |
| IEC 62893 | Charging cables for EVs | Cable construction, testing, safety |
| IEC 61851-23-3 | DC EV charging station requirements (MCS system) | MCS system-level standard (in development) |
| IEC 63379 | MCS connector and cable specifications | MCS international standard (in development) |
| SAE J3271 | Megawatt Charging System requirements | MCS North American standard (published March 2025) |
| SAE J3105/3 | EV power transfer system using conductive automated connection | Mining automated charging connector standard |
| IEC 60228 | Conductors of insulated cables | Class 5/6 flexible conductor specifications |
| ISO 15118-20 | Vehicle-to-grid communication interface | MCS communication protocol; V2G, Plug & Charge |
| EN 50620 | EV charging cables (EU harmonized) | European cable construction standard |
| UL 2594 | EV supply equipment (North America) | Safety certification for charging equipment |
9. Anhui Feichun Cable Solutions 安徽飞纯电缆解决方案
Anhui Feichun Special Cable Co., Ltd. (安徽飞纯特种电缆有限公司) is a professional manufacturer of special cables for new energy applications, including liquid-cooled EV charging cables for both CCS2 and MCS systems. Feichun’s engineering capabilities encompass the full range of cable requirements discussed in this article — from standard 500 A CCS2 liquid-cooled assemblies to high-current MCS-grade cable solutions designed for heavy-duty and mining applications.
Feichun offers customized cable solutions including conductor cross-section optimization, coolant channel architecture selection, insulation material specification, and cable length configuration to meet specific project requirements. All products are manufactured to comply with applicable IEC, EN, and national standards.
（安徽飞纯特种电缆有限公司是新能源特种电缆的专业制造商，包括适用于CCS2和MCS系统的液冷EV充电电缆。飞纯提供定制电缆解决方案，包括导体截面优化、冷却通道架构选择、绝缘材料规格和电缆长度配置。）
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欢迎就液冷充电电缆技术方案咨询飞纯特种电缆10. References 参考文献
-
CharIN e.V., “Megawatt Charging System (MCS) — Technology Overview,” CharIN Global, 2024.
https://www.charin.global/technology/mcs/ -
CharIN e.V., “Whitepaper Megawatt Charging System (MCS), Version 1.0,” November 2022.
https://www.charin.global/media/pages/technology/knowledge-base/whitepaper_megawatt_charging_system_1.0.pdf -
Wikipedia, “Megawatt Charging System,” Wikimedia Foundation, 2025.
https://en.wikipedia.org/wiki/Megawatt_Charging_System -
Wikipedia, “Combined Charging System,” Wikimedia Foundation, 2025.
https://en.wikipedia.org/wiki/Combined_Charging_System -
SAE International, “SAE J3271™: The Megawatt Charging System (MCS),” published March 2025.
https://sae.org/blog/j3271-megawatt-charging-system-gp-bohn -
ABB E-mobility, “MCS1200 — Megawatt Charging System Product Specifications,” 2025.
https://e-mobility.abb.com/en/products/heavy-duty/mcs1200 -
Stäubli Electrical Connectors, “Megawatt Charging System (MCS),” 2024.
https://www.staubli.com/global/en/electrical-connectors/products/multi-pole-connectors/mcs.html -
Stäubli Electrical Connectors, “Charging Solutions for the Mining Industry — QCC-5000,” 2024.
https://www.staubli.com/global/en/electrical-connectors/industries/electric-and-hybrid-vehicles/charging-solutions/mining-charging.html -
International Mining, “Stäubli launches ‘industry-leading’ 7.5 MW Quick Charging Connector System,” September 2024.
https://im-mining.com/2024/09/24/staubli-launches-industry-leading-7-5-mw-quick-charging-connector-system/ -
ABB, “Plug-in Mines — eMine™ FastCharge for Mining Haul Trucks,” 2024.
https://new.abb.com/news/detail/103093/plug-in-mines -
Scania Group, “Megawatt Charging — All You Need to Know About MCS,” 2025.
https://www.scania.com/group/en/home/electrification/e-mobility-hub/megawatt-charging-all-you-need-to-know-about-mcs.html -
Phoenix Contact, “High Power Charging — CHARX connect Professional Liquid-Cooled CCS Charging Connectors,” 2025.
https://www.phoenixcontact.com/en-us/technologies/high-power-charging -
Medatech Engineering, “Fast Charging Underground Electric Haul Trucks,” October 2025.
https://medatech.ca/fast-charging-beats-battery-swapping-for-underground-electric-haul-trucks/ -
Progress In Electromagnetics Research C, “Structural Optimization and Performance Evaluation of Liquid Cooled Super Fast Charging Cable Based on Multi-Physics,” Vol. 152, pp. 67–72, 2025.
https://www.jpier.org/ac_api/download.php?id=24112003 -
OEM Off-Highway, “Custom Charging Infrastructure: Engineering a Safer, More Efficient Solution for Electric Mining Trucks,” 2025.
https://www.oemoffhighway.com/electronics/power-systems/article/22948763/ -
InsideEVs, “CharIN Officially Launches The Megawatt Charging System (MCS),” June 2022.
https://insideevs.com/news/592360/megawatt-charging-system-mcs-launch/ -
Argonne National Laboratory, “Charging for Heavy-Duty Electric Trucks — MCS FAQs,” March 2023.
https://www.anl.gov/sites/www/files/2023-03/MCS_FAQs_Final_3-13-23.pdf
