BYD Targets 2027 EV with Solid-State Battery Tech
BYD plans to introduce an electric vehicle utilising solid state battery technology in 2027. Ms Stella Li, the company's Executive Vice President, confirmed this intention. Concurrently, FinDreams, BYD's battery division, is progressing with limited sulphide production as it prepares for future expansion. This development marks a significant step for the automotive manufacturer.
Ms Li outlined BYD's objective to integrate solid state battery technology into a vehicle within the stated timeframe. She provided these details during an interview with Carwow.es, which covered BYD's expansion into the European market and its Denza brand. She stated that BYD's research and development department is examining all battery technologies. Ms Li asserted that the organisation holds a leading position in both commercialisation and technological advancement. The model scheduled for release in 2027 will represent the first BYD vehicle to incorporate the solid state battery system. She further explained that the battery team is analysing battery chemistry alongside manufacturing capabilities and equipment design. However, Ms Li did not specify the model name, provide battery pack specifications, offer range figures, or indicate a retail mass production commencement date.
And FinDreams, the battery arm of BYD, is pursuing a sulphide solid electrolyte approach. This includes the exploration of lithium phosphorus sulphur chlorine materials. The division has previously discussed prototype cells rated at 20 amp hour and 60 amp hour, aiming for energy densities near 400 watt hours per kilogram at the cell level. It is important to note these figures do not automatically translate to equivalent performance at the battery pack level. Engineering challenges persist in this pursuit.
These engineering hurdles encompass various aspects of battery function and production. Contact loss at the solid to solid interface, as electrodes expand and contract, remains a challenge. Maintaining sustained mechanical stack pressure within battery packs is also a concern. Furthermore, the impact of vibration and thermal cycling on batteries in a running vehicle requires rigorous resolution. Dry electrode manufacturing is necessary to prevent solvent reactions with sulphides. Strict moisture control is critical during production because hydrolysis can generate hydrogen sulphide, a hazardous gas. FinDreams has collaborated with domestic equipment suppliers on polytetrafluoroethylene fibrillation dry processes at pilot facilities. Intellectual property filings also indicate ongoing work on composite cathode and sulphide and halide interface technologies.
But previous statements from FinDreams executives have offered a longer term roadmap. These include comments from Mr Sun Huajun, the Chief Technology Officer, which indicated plans for limited sulphide production. Small batch trials, involving approximately 1,000 vehicles, are anticipated around 2027. Larger commercial volumes are expected closer to 2030. The initial integration of these batteries is likely to occur on premium vehicle platforms. These include models from brands such as Yangwang and the flagship Denza line. This strategic choice is driven by the premise that the initial higher cost of solid state batteries can be more readily absorbed within the premium segment before wider adoption in higher volume BYD models.
Chief Scientist Mr Lian Yubo has previously commented on the state of all solid state systems. He stated that while these systems have reached a critical development stage, they still confront obstacles. Mr Lian also projected a scenario where liquid lithium ion and solid state battery packs could coexist in the market for a period ranging from 15 to 20 years. This suggests a gradual transition rather than an immediate replacement of current battery technologies.
So, the broader industry context reveals similar timelines. CATL, another battery manufacturer, has independently set a target of 2027 for the small batch production of all solid state batteries. This indicates a parallel timeline within the industry for the advancement of this technology. However, this report focuses solely on the product and process milestones specific to BYD and its FinDreams division, without drawing direct market comparisons to other organisations. According to Pandaily, these developments highlight the ongoing progress in electric vehicle battery technology.
BYD aims to launch its first electric vehicle with solid state battery technology in 2027.
FinDreams, BYD's battery division, is developing sulphide solid electrolytes, including lithium phosphorus sulphur chlorine materials.
Engineering hurdles remain, such as contact loss at the solid to solid interface, maintaining pack pressure, and strict moisture control during manufacturing.
Initial solid state battery adoption is expected on premium platforms like Yangwang and Denza due to cost absorption.
Industry Chief Scientists suggest liquid lithium ion and solid state batteries may coexist for 15 to 20 years.
Source: Pandaily
