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Mode 2 with Temperature Sensor - Optimised Layout

TECHNICAL NOTE | MODE 2 PORTABLE EVSE

Why We Need to Choose Mode 2 Portable EV Charger with Temperature Sensor?

Plug-overheating protection for 16A Schuko and 13A UK power plugs

1. The Overlooked Factor: Safety

When we decide to choose one mode 2 portable EVSE for our own car, we find too many designs, more functions, and cheaper price, while when we choose, we often ignore the most important factor – safety. Let us see how we focus on power plug for 16A Schuko and 13A UK power plug.

2. What Happens When a Plug Overheats

The dangers of a power plug becoming excessively hot include:

1. Fire hazard: High temperatures can cause the insulation material of the plug or socket to soften or carbonize, eventually igniting surrounding combustible materials. When the temperature exceeds a certain limit – for instance, if the casing reaches over 300°C – the plastic may carbonize, turn black, or even catch fire.

2. Risk of electric shock: Overheating often stems from poor contact, which increases local electrical resistance. High heat can damage the insulation layer, exposing live parts and increasing the risk of electric shock when plugging or unplugging the device.

3. Equipment damage: Sustained high temperatures accelerate the aging of internal components and wiring, shortening the device's service life and causing gradual, cumulative damage to the appliance itself.

4. Accelerated aging and short circuits: High heat causes wire insulation to soften and deform, further worsening poor contact. This creates a vicious cycle of "heating – aging – increased heat", which can ultimately lead to a short circuit.

3. The 13A UK Plug: A Century of Wiring Behind the Wall

For the UK power plug, it has a long history:

Year	Milestone
1882	The earliest prototype of the British socket: Thomas Tayler Smith patented a "circuit connector" in London, which is regarded as the prototype of early sockets.
1883	The world's first plug and socket: The world's first plug and socket were invented in the UK.
1893	The emergence of the British square plug: The UK introduced a short cylindrical plug, which later evolved into the square shape.
1947	Establishment of the modern British standard (BS 1363): The standard for the familiar British three-pin square plug was officially established and made mandatory.

At the same time, it means in the UK the socket has been in use for a very long time. The sockets and cables have been embedded within the conduits and walls for decades; combined with the UK's consistently wet and rainy weather – particularly in winter – this easily leads to the deterioration and aging of the wiring and cables.

4. The 16A Schuko Plug

For the Schuko power plug, the history is shorter: the German Schuko socket (specifically the CEE 7/4 standard) was invented and patented in 1925 by the German electrical company ABL Sursum.

5. Our Solution: NTC Temperature-Sensing Protection

Here is our solution for the Mode 2 EV charger. Our power plugs feature a temperature-sensing mechanism – typically utilizing an NTC thermistor – that monitors the plug's surface temperature. As the temperature rises, the resistance changes and sends a signal to the PCB, triggering a temperature-reduction protocol. Our standard mechanism operates as follows:

Plug temperature	System response
Above 85°C	Power is cut off within 0.2 seconds (stopping the charge), or the current is reduced by half.
Between 70°C and 85°C	The current is automatically reduced, as normal operating temperatures do not reach such high levels.
Below 66°C	Charging resumes at the original rate, as the temperature has returned to a safe, reasonable range.

This temperature control mechanism is designed to protect the power plug and prevent spontaneous combustion or fire hazards. We customize the control logic to meet each client's specific requirements. The video below demonstrates our testing process, clearly showing how the system responds to excessive plug temperatures by dynamically adjusting the current.

Temperature-protection logic of the Mode 2 plug: current reduction between 65°C and 80°C, cut-off within 0.2 s above 80°C, automatic restart below 65°C.

Why Buy From Suzhou Eco New Energy

Strength

One supplier, five families

Portable chargers, wallboxes, cables, adapters and V2L from a single factory — consolidating your accessory supply chain and cutting qualification overhead.

Certified for your market

CE / TÜV on the core range, with the test documentation and declarations your EU import process needs.

Customisation built in

Custom cable colours, socket standards and branded moulds — OEM and ODM programmes are standard, not special order.

Broad vehicle compatibility

V2L dial design and the Type 2 / GB/T / CCS / NACS adapter matrix cover the vehicles European drivers actually own.

Service, Delivery & Warranty

Beyond the product itself, we back every order with responsive service, predictable delivery and a solid warranty:

Customer Service

· Professional product advice and purchase options for every customer

· All emails answered within 24 hours on working days

· Online customer service in English, French, German and Spanish

· One-on-one service for all customers

Delivery Time

Table 1— Standard lead times

Order type	Lead time
Samples / test orders	2–5 working days
Standard products, 100 pcs and above	7–15 working days
Customized orders	20–30 working days

Agency Policy

Please contact our sales department for more details about our agency policy.

Warranty & After-Sales Service

All our portable EV charger products carry a 2-year warranty. The specific after-sale plan includes free replacement, or spare parts can be sent to you for better local after-sales service. According to feedback from the market, after-sale problems are rare because strict product inspections are carried out before leaving the factory.

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