The independent test was conducted by automotive blogger “Caishendao,” who monitored a BYD vehicle while charging from 8 percent to 97 percent state of charge. Multiple external sensors were attached directly to the battery pack to measure thermal performance during the charging process. According to the published data, temperatures recorded at different points on the battery surface reached a peak of approximately 76.4 degrees Celsius. Onboard diagnostic systems inside the vehicle reported slightly lower internal temperature readings during the same test.
The results quickly triggered widespread online discussion regarding whether such elevated temperatures could negatively affect long-term battery reliability and operational safety, especially under repeated use of ultra-fast charging systems. Concerns centered on the potential thermal stress generated by megawatt-level charging technology and its possible impact on lithium iron phosphate battery stability over time.
BYD has not publicly announced any modifications to its charging specifications following the online debate. The company has continued promoting its megawatt charging technology as a key component of its next-generation electric vehicle strategy, positioning faster charging capability as a major competitive advantage in the rapidly evolving global electric vehicle market.
The controversy also renewed attention on China’s evolving battery safety regulations. Discussions referenced proposed battery safety guidelines that reportedly recommend lower operating temperature thresholds for lithium iron phosphate battery systems. However, these proposed standards have not yet become mandatory regulations.
Industry observers noted that ultra-fast charging naturally increases thermal pressure inside electric vehicle battery systems. However, experts also emphasized that modern electric vehicles rely heavily on advanced liquid cooling systems and thermal management technologies designed to prevent dangerous overheating conditions during charging and operation.
The debate comes at a critical time for BYD Company as it continues expanding its dominance in the global electric vehicle sector. The company remains the world’s largest electric vehicle manufacturer by sales volume and delivered more than 314,000 vehicles globally in April 2026 alone.
As global competition intensifies over charging speed, battery efficiency, and next-generation electric mobility technology, the incident has highlighted growing international scrutiny over how manufacturers balance high-performance charging capabilities with long-term battery safety, durability, and consumer confidence.
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