YANTAI, China – Yantai Rongfan Electronics Technology Co., Ltd. positions its advanced Ceramic Positive Temperature Coefficient (CPTC) thermistors as a fundamental safeguard for the next generation of Battery Management Systems (BMS). As global demand for electric vehicles (EVs) and energy storage solutions accelerates, ensuring the absolute reliability and safety of lithium-ion batteries is paramount. Rongfan's protection components offer a resettable, fail-safe layer for critical BMS circuits.
A Battery Management System is vital for monitoring voltage, temperature, and current within a battery pack. While primary protection is handled by ICs and MOSFETs, secondary passive protection is essential for robustness. Faults like wiring harness shorts or sensor failures can pose severe risks. Rongfan's engineers highlight that a redundant protection strategy incorporating CPTCs enhances system-level safety and reliability, meeting stringent automotive and industrial standards.
Rongfan's CPTC thermistors are deployed in specific, high-risk points within the BMS architecture:
Voltage Sampling Line Protection: Each cell's voltage must be measured precisely. A short circuit on these delicate lines can cause a direct cell short. Rongfan's low-resistance CPTCs are placed in series on each sampling line. They provide resettable overcurrent protection without affecting measurement accuracy during normal operation, a key advantage over one-time fuses.
Communication & Control Power Rail Protection: Circuits powering the BMS microcontroller (MCU) and communication chips (CAN, RS485) are vulnerable to transients and overloads. A CPTC on these rails protects against downstream faults, preventing MCU damage and ensuring continuous system monitoring.
Thermal Runaway Mitigation: In conjunction with temperature sensors and fuses, CPTCs can act as a temperature-sensitive current limiter, adding a responsive layer of safety in extreme thermal events.
Yantai Rongfan delivers this critical technology with a commitment to "Customer First, Quality First." With production bases in Shandong and Guangdong and an annual output capacity of nearly 100 million units, the company ensures reliable supply and consistent performance. All products, including the CPTC series for BMS, are backed by major international certifications (UL, TUV, SGS). Furthermore, strategic collaborations with global leaders like Littelfuse allow Rongfan to integrate cutting-edge material science into its solutions.
As BMS designs evolve towards higher integration and safety standards, innovative passive protection becomes indispensable. Yantai Rongfan is dedicated to advancing CPTC technology, providing engineers with reliable components to build safer, more durable battery systems for electric mobility and renewable energy storage.
About Yantai Rongfan Electronics Technology Co., Ltd.:
Yantai Rongfan is an innovative high-tech enterprise specializing in the R&D, production, and sales of circuit protection devices, including PPTC/CPTC resettable fuses, thermistors, and fuses. Its products are widely used in automotive electronics, power supplies, batteries, and communications.
