SNVAAB6 March   2026 BQ76907-Q1 , LM5190-Q1 , TPS55287-Q1

 

  1.   1
  2.   Abstract
  3. 1Introduction
    1. 1.1 Function and Significance
    2. 1.2 Regulatory Requirements
  4. 2System Architecture
    1. 2.1 CPM Structure and Application Challenges
    2. 2.2 Main Functional Units
  5. 3Critical CPM Parameters
    1. 3.1 Basic Parameters of 3s and 5s Supercapacitors
    2. 3.2 Door Unlock Motor Parameters and Power Consumption Calculation
    3. 3.3 Charging Time Requirements
  6. 45s System Scheme
  7. 53s System Scheme
  8. 6Summary
  9. 7References

Abstract

This document was translated from a simplified Chinese source. (ZHCAG59)

The automotive Crash Power Module (CPM) is a safety subsystem that provides emergency power, signals, and control at the exact moment of a vehicle collision. It achieves millisecond-level response and failover through dual-power redundancy, ensuring that critical functions such as door unlocking operate reliably under extreme impacts to facilitate the rapid escape of occupants. With the widespread adoption of electric doors and hidden/semi-hidden door handles in new energy vehicles, the CPM has taken on an increasingly vital practical significance. Combining the characteristics of supercapacitors and unlock motors within the CPM module, this paper introduces the basic architecture and system configurations, and provides circuit designs and experimental verifications based on the electrical characteristics of 3-cell and 5-cell supercapacitors in series (3s and 5s configurations).