<p>Leapmotor announced its CTC 3.0 High-Low Fusion Battery and LEAP 5.0 vehicle architecture on 17 September 2026. The company says the battery design can provide low-voltage functions without a separate 12-volt battery, while high- and low-voltage functions share cells, modules, thermal management, and energy distribution. It says the first products using the technologies will be introduced from 2027.</p> <p>This is an announced future architecture, not a current production award, certification, volume commitment, or independently measured performance result. Leapmotor reports an 18% reduction in part count versus prior architectures; that figure should remain attributed to the company. The announcement is nevertheless useful as a reminder that a familiar component can become part of a broader system question when vehicle architecture changes.</p> <p>For a technical procurement or industrialisation team, removing a separate auxiliary battery changes more than a bill of materials. It prompts questions about failure modes, electrical isolation, thermal interfaces, service and repair procedures, structural bonding, end-of-life handling, diagnostics, validation responsibility, and the readiness of the relevant supply base. Those questions should be held in a programme decision record before a future architecture is interpreted as a sourcing simplification.</p> <p>The practical principle is simple: fewer separate parts may mean more integrated dependencies. The buyer remains responsible for deciding whether the evidence supporting design, quality, commercial, and supplier decisions is sufficient for the programme.</p> <p><strong>Source:</strong> <a href="https://www.media.stellantis.com/em-en/leapmotor/press/leapmotor-launches-two-innovations-at-the-2026-leapmotor-tech-day" target="_blank" rel="noopener noreferrer">Stellantis / Leapmotor, 17 September 2026</a>.</p>
Automotive Engineering
When the 12-volt battery becomes an architecture question
Leapmotor’s announced CTC 3.0 design shows how an auxiliary battery can become part of a wider system-design and validation question.
2026-09-20 · 2 min read