BYD has already produced its first solid-state cells

Considering Lithium ‘semi-solid-state battery’ (SSSB) already does 25% to 45% higher capacity with roadmap at 55% next year and double the battery capacity before 2030. I wonder what could we expect from ‘all-solid-state batteries’ (ASSB).<p>Most people think current AI development is the most important research, I actually think ASSB ( or any massive battery improvement ) would bring us far more real life, quality improvement with things that previously were not possible.

&gt; In theory, replacing the current liquid electrolyte in a battery cell with a solid offers a number of advantages. As the flammable liquid electrolyte is no longer required, solid-state cells are generally safer. At the same time, higher energy densities and more power are possible, resulting in a longer range and shorter charging times.<p>In case you wonder why it can be important

This is just pilot production is the first of many steps towards mass production. They don’t expect actual production until 2027.<p>It even mentions that CATL is at roughly the same stage. So while good news its still going to take some time to get these into production cars and to get the costs down.

&gt; However, BYD does not expect series production in the near future.<p>That&#x27;s the most important part of this article I believe.

There&#x27;s a little more background in <a href="https:&#x2F;&#x2F;cnevpost.com&#x2F;2025&#x2F;02&#x2F;15&#x2F;byd-demonstration-use-all-solid-state-batteries-2027&#x2F;" rel="nofollow">https:&#x2F;&#x2F;cnevpost.com&#x2F;2025&#x2F;02&#x2F;15&#x2F;byd-demonstration-use-all-so...</a><p>In April 2024, CATL said the were working on prototypes and made some by Nov.<p>They were saying conventional batteries topped out at 350 Wh&#x2F;kg while solid state could potentially go to 500+<p>BYD&#x27;s tech is similar based on sulfide electrolytes.<p>They still seem to have problems with cost and making them in volume.

on this topic, I have been wondering lately - what&#x27;s with China&#x27;s dominance in the battery science area?<p>Is it still true that they&#x27;re the only ones who can make LiFePO batteries? Is anyone else working on production of these?<p>What accounts for this gap - patents (ha), secret research, materials, manufacturing prowess, all of the above?

Yea I won&#x27;t be trusting any Chinese batteries. I&#x27;ve seen too many videos of BYDs exploding or catching fire after locking the occupants inside.

<i>According to the battery business CTO, BYD expects to start “mass demonstration” of solid-state batteries around 2027. However, he did not provide any information on the number of prototype cells produced to date.</i><p>Awesome if true, but I&#x27;ll believe it when I see it. Until then like similar announcements from Toyota and others, I&#x27;ll hold my enthusiasm.

Now they just need to build a decent car.

&gt; A truly large-scale introduction of solid-state batteries could possibly only take place after 2030, Sun is quoted in the reports<p>So they&#x27;re a bit behind Toyota