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Technical Deep Dive | How do YMIN Supercapacitors solve the problem of locked doors after a collision with new energy vehicles?

 

Introduction

After a collision, a high-voltage power outage in a new energy vehicle causes the electronic door locks to malfunction, leaving passengers with no escape path. This safety hazard has become a major industry concern. Traditional battery backup solutions have significant shortcomings in low temperatures, high power consumption, and long life.

YMIN Supercapacitor Solution

The power system completely shuts down, rendering the BDU inoperable;

The battery has poor low-temperature performance, with only 50% capacity remaining at -20°C;

The battery has a short cycle life, making it difficult to meet the automotive-grade requirement of more than 10 years;

The door lock motor requires a high-rate discharge in milliseconds, resulting in slow battery response and high internal resistance.

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Door lock control unit using supercapacitors as emergency backup power

- YMIN Solutions and Process Advantages-

YMIN’s automotive-grade supercapacitors offer the following technical advantages, making them an ideal alternative:

Millisecond response time and peak current of hundreds of amperes;

-40°C to 105°C wide operating temperature range with capacity degradation of less than 10%;

Cycle life exceeding 500,000 cycles, maintenance-free;

Physical energy storage, no explosion risk, and AEC-Q200 certification.

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Reliability Data Verification & Model Selection Recommendations

1. Test Equipment

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2. Test Data

3. Test ResultsIn the high temperature and high humidity test, the capacity change rate was controlled at around -20%, with excellent stability;Maintains over 95% of the current output capability at -40°C;

Multiple third-party reports + IATF16949 system assurance, reliability is authoritatively endorsed.

 

- Application Scenarios and Recommended Models -

Applicable to: unlocking doors after a collision, emergency window lifts, trunk escape switches, etc. We recommend using YMIN SDH/SDL/SDB series supercapacitors, especially the 105°C high-temperature models, which are more suitable for vehicles with long life cycles.

SDH 2.7V 25F 16*25 85℃ supercapacitor (with third-party AEC-Q200 report)

SDH 2.7V 60F 18*40 85℃ supercapacitor (automotive grade)

SDL(H) 2.7V 10F 12.5*20 105℃ supercapacitor (with third-party AEC-Q200 report)

SDL(H) 2.7V 25F 16*25 105℃ Supercapacitor (Automotive Grade)

SDB(H) 3.0V 25F 16*25 105℃ Supercapacitor (Automotive Grade)

SDN 3.0V 120F 22*45 85℃ Horn Type Supercapacitor

 

Conclusion
YMIN supercapacitors are not only backup power sources, but also a key safeguard for life safety. With leading technology and solid data, they are worthy of the attention and selection of every automotive electronics engineer.
Post time: Sep-23-2025