Detailed Description
What Is an EV Charging Cable?
An EV (electric vehicle) charging cable is the flexible cable assembly that connects an electric vehicle to the charging equipment — the power cord that delivers alternating current (AC) from the charger to the vehicle's onboard charger. Unlike a standard power cord, an EV charging cable contains not only power conductors but also communication conductors: the Control Pilot (CP) and Proximity Pilot (PP) signal cores that enable the intelligent, safe charging protocol defined by IEC 61851.
The cable operates in two charging modes defined by IEC 61851-1:
- Mode 2: Portable charging using an IC-CPD (in-cable control and protection device) — a control box integrated into the cable that provides the safety functions (residual current detection, overcurrent protection, temperature monitoring). The cable plugs into a standard domestic socket at one end and the vehicle at the other. This is the "emergency charger" supplied with most EVs
- Mode 3: Fixed AC charging station charging — the cable connects a dedicated wallbox or charging post to the vehicle. The charging station provides the control, protection, and communication functions; the cable is a "dumb" power + signal extension between the charger and the vehicle. This is the standard for home, workplace, and public AC charging
Type 1 vs Type 2 — The Two Global Connector Standards
| Parameter | Type 1 (SAE J1772) | Type 2 (IEC 62196-2) |
|---|---|---|
| Standard | SAE J1772 (North America) | IEC 62196-2 (Europe / global) |
| Vehicle connector pins | 5 pins: L1, N, PE, CP, PP | 7 pins: L1, L2, L3, N, PE, CP, PP |
| Charging phases | Single-phase only | Single-phase and three-phase |
| Maximum current | 32 A (7.4 kW single-phase at 240 V) | 32 A single-phase (7.4 kW at 230 V); 32 A three-phase (22 kW at 400 V); 63 A three-phase (43 kW) |
| Primary markets | North America, Japan, South Korea | Europe, China (GB/T 20234, mechanically compatible with Type 2), Australia, rest of world |
| Locking mechanism | Mechanical latch on the connector | Electronic lock in the vehicle inlet, activated by the charging station |
The global trend is toward Type 2 as the universal AC charging connector. China's GB/T 20234 AC connector is mechanically a variant of Type 2. For any EV charging cable supplied to the European, Chinese, or global export market, Type 2 is the standard specification.
The Control Pilot — How EV Charging Works
The Control Pilot (CP) signal is the core of the IEC 61851 charging protocol. The charging station generates a 1 kHz square wave on the CP line. The duty cycle (percentage of time the signal is at +12 V vs -12 V) tells the vehicle the maximum current the charging station can supply:
| CP Duty Cycle | Maximum Current | Typical Application |
|---|---|---|
| 10% | 6 A | Basic charging from a standard domestic socket (Mode 2) |
| 16% | 10 A | Mode 2 charging from a domestic socket |
| 25% | 16 A | Mode 2 or Mode 3, typical home wallbox at 16 A |
| 53% | 32 A | Mode 3, home and public AC charging at 32 A |
| 80% | 63 A | Mode 3, high-power public AC charging at 63 A |
The vehicle measures the CP duty cycle and limits its onboard charger current draw accordingly. The vehicle also communicates its connection state (not connected, connected, charging, charging with ventilation) to the charging station by switching different resistances between the CP and PE lines, changing the CP voltage level. This simple, robust analog protocol has operated billions of charge cycles worldwide without the complexity or vulnerability of digital communication.
The Proximity Pilot (PP) is a separate function: a resistor in the vehicle connector plug is connected between the PP and PE pins. The vehicle measures this resistance to determine the cable's current rating — preventing the vehicle from drawing 32 A through a 16 A-rated cable. The PP resistor values are:
- 1 500 Ω: 10 A cable
- 680 Ω: 16 A cable
- 220 Ω: 32 A cable
- 100 Ω: 63 A cable
TPE vs PUR Jacket — Which for Your Charging Station?
| Environment | Recommended Jacket | Reason |
|---|---|---|
| Residential home wallbox | TPE | Lower cost; the cable experiences moderate use (1–2 charge cycles per day); garage or carport installation means limited UV, chemical, and mechanical exposure |
| Workplace charging | TPE or PUR | TPE adequate for individual assigned parking spaces; PUR for shared charger bays with higher usage |
| Public on-street / car park | PUR | The cable is exposed to vehicle traffic, weather 24/7, road salt and chemicals, and intensive daily handling by the public; PUR's superior abrasion and chemical resistance justifies the cost premium |
| Fleet depot / bus depot | PUR | Intensive daily use with repeated coiling/uncoiling; exposure to diesel, oil, and road dirt from heavy vehicles; PUR's oil resistance and durability are required |
| Car dealership showroom | TPE | Indoor installation, low usage, clean environment; TPE's lower cost and cosmetic appearance (clean black or custom color) are appropriate |
| Cold climate (≤ -30°C) | PUR or cold-flex TPE | Standard TPE may stiffen; cold-flex TPE or PUR retains flexibility for outdoor charging in Arctic/sub-Arctic winter conditions |
For most public and commercial charging station installations, PUR is the recommended jacket material. The incremental cost over TPE is modest and the extended service life in the demanding public charging environment more than justifies it.
Why Choose Yichi EV Charging Cables
- TUV certified to EN 50620 / IEC 62893: The cable carries TUV certification, the most widely recognized third-party certification for EV charging cables in the European and global market. The certification covers the full Type 2 cable construction including the CP and PP conductors
- Type 1 and Type 2 connector configurations: Both global standards from a single manufacturer — supply the cable configured for your target vehicle market
- Vehicle run-over tested: The cable survives the simulated vehicle drive-over test per EN 50620 Annex D — a key safety requirement for cables that may be run over by the vehicle or other cars in the charging area
- PUR and TPE jacket options: Choose the jacket material that matches the installation environment and usage intensity. PUR for public and high-use commercial charging; TPE for residential and light commercial
- Custom cable lengths and connector terminations: Standard 5 m, 7.5 m, and 10 m lengths; custom lengths cut to order; open-ended (stripped and tinned for charger-side termination) or terminated with a Type 2 female connector for tethered cable replacement
- Cold-flex rated to -40°C: The cable is designed for outdoor charging in all climates — from Norwegian winter to Saudi summer. The jacket compound and core insulation retain their mechanical and electrical properties across the full operating temperature range