BYD will unveil a car with a solid-state battery in 2027. For now, it is a demonstrator model, not a mass-produced vehicle.

BYD confirmed that it will introduce a vehicle using its own solid-state battery by 2027. This statement was made in Spain by Stella Li, but for now we are talking about a concept car and technology validation, rather than large-scale commercial sales.

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For EV drivers, two numbers are crucial here: 400 Wh/kg per cell and a plan to start mass production around 2030. In other words, BYD wants to be in the race, but it has not yet delivered a product that can be simply ordered at a dealership.

2027 is the target date for the first car, but not for a real market launch

Stella Li said in an interview with Carwow.es that BYD is expected to have its first model with this technology by next year, in 2027. In practice, it refers to a car that will prove it’s possible to integrate the cells and entire system into a functional vehicle.

This distinction is important. The manufacturer did not provide the model name, battery capacity, charging specifications, or the date of mass production start. Without this information, it’s difficult to speak of a proper market launch. As of now, it’s more of a test program than a new “Blade Battery for the masses.”

BYD has indicated for several years that the first implementations will go to the pricier brands in its group, such as Denza, Yangwang, or Fang Cheng Bao. This makes sense because early solid-state batteries will be very expensive, and it’s easier to hide that cost in a premium car worth several hundred thousand zlotys than in a model like the Atto 3 or Dolphin.

What BYD is developing technically

The work is being carried out by FinDreams, BYD’s battery division. The company began researching oxide and sulfide cells around 2016, and after 2018 it clearly shifted focus toward sulfide electrolytes.

This is the path that appears most frequently these days with new updates from China. BYD has already reported prototypes of 20 Ah and 60 Ah cells, with the goal of achieving an energy density of up to 400 Wh/kg per cell. This is more than twice that of current, mass-produced Blade batteries, at least when considering just the cell chemistry.

We need to add a caveat right away here. The cell’s specifications are not the same as those of the entire battery pack. In a car, there are also the housing, cooling system, electronics, safety mechanisms, and mechanics involved. The theoretical values may be high, but the battery in a vehicle must also withstand vibrations, temperature changes, and thousands of charging cycles.

BYD is working not only on the chemistry but also on the production process and equipment needed to manufacture such cells. And this might be even more important than the laboratory record itself. Battery history is full of promising prototypes that failed due to scale issues, costs, or durability problems.

The biggest problem isn’t the cell itself but production

Sulfide cells have one major advantage: high ionic conductivity. This makes their promise old and appealing—longer range, faster charging, better safety. The issue is that moving from the laboratory to a car usually proves difficult.

The second challenge is production itself. Traditional wet electrode processes using solvents do not always work well with sulfide electrolytes. Therefore, the industry is turning to dry electrode processes, including those using PTFE. Pilot tests show promising results. It is only with tens of gigawatt-hours per year that the real test begins.

There is also the issue of moisture. Some sulfide electrolytes can generate hydrogen sulfide, H2S, when in contact with water. This means stricter requirements for controlling the production environment and the sealing of cells and packs.

In short: solid-state technology is not losing in terms of marketing today. It is losing in terms of engineering at scale.

BYD already has a pilot project and is preparing a larger production line

According to reports from China, a pilot production line for BYD with a capacity of 2 GWh began operations in Pingshan, Shenzhen, in February 2026. It is intended for process validation and vehicle testing, with completion rates already exceeding 90 percent.

This sounds promising, but we are still in the transitional phase. The pilot plant is not yet a full-scale factory capable of delivering large volumes to dealerships across several continents without issue.

The next step is the planned construction of a mass production line in Bishan, Chongqing, with a capacity of 20 GWh, with work set to begin in the third quarter of 2026. Demonstration installations in vehicles are expected to start in 2027. However, the scale of deployment is intended to be small, with estimates suggesting only a few thousand vehicles.

This contradicts earlier statements by Sun Huajun, CTO of Shenzhen BYD Lithium Battery. He had suggested limited production trials around 2027, on the order of 1,000 vehicles, with broader commercialization around 2030.

The range figure looks impressive, but let’s remember CLTC

Chinese tests also showed a result that BYD would surely like to showcase to the world. A prototype equipped with such a battery was said to achieve 1,218 km of range in the CLTC cycle.

But that’s exactly the CLTC cycle. It’s typically even more optimistic than WLTP. Such a figure tells us that the energy density could be very high. It doesn’t mean a European driver can drive 1,200 km on the highway without charging. They certainly can’t.

This remains an interesting signal. Especially if BYD can deliver reasonable durability and fast charging. But without data on battery capacity, vehicle weight, and charging curve, it’s currently more of a demonstration of potential than a parameter for a purchase decision table.

BYD isn’t alone. The competition has become fierce.

Stella Li talks about leading the way, but there are many “leaders” in this race today. Toyota aims to introduce all-solid-state battery vehicles by 2027-2028, Samsung SDI mentions mass production in 2027, while CATL, GAC, Geely, Changan, Mercedes-Benz, and Stellantis also set similar timelines.

The problem is that a similar timeline doesn’t mean similar readiness. One company will show a demonstrator model. Another will create a test fleet. A third will launch a premium series. And technically, each will claim to have “introduced solid-state technology.”

Therefore, it’s better to focus not on the first press photos but on three things: volume, cost, and durability. If several hundred or even thousands of cars are produced in 2027 to showcase the technology, it still won’t be the moment when the market changes. We’ll see that change only when prices start to drop and production reaches tens of gigawatt-hours.

BYD has an advantage here. The company controls a large part of the value chain, from chemicals to the car itself. If anyone is going to succeed in shortening the path from laboratory to showroom, BYD is among the favorites. But still only among them.

On a side note, Stella Li also mentioned autonomy and the expected regulations for L3 levels in China starting in July 2027. This is another major area of development for Chinese brands. However, in this particular news item, the battery is much more interesting than software promises.

The first BYD car with solid-state batteries might be significant not because it will revolutionize the market by 2027, but because it will show whether the Chinese can turn this technology into a real product rather than just a concept. Who do you think will be the first to deliver a true mass-produced solid-state battery: BYD, CATL, Toyota, or someone else?