I’ve been covering the EV space for years, and every once in a while something comes along that actually feels like it could change the game. Samsung SDI’s new all-solid-state battery is one of those moments.
Announced at SNE Battery Day 2024 in Seoul, this isn’t just another prototype. Samsung has a fully operational pilot production line running right now, with the first test cells already in the hands of major EV makers.
The promise? Electric vehicles that can drive roughly 600 miles (about 965–1,000 km), recharge in around 9 minutes, and keep going strong for up to 20 years. If you’re tired of range anxiety and long charging stops, this is the kind of leap we’ve all been waiting for.
Samsung’s Solid-State Battery: A Closer Look
At the SNE Battery Day 2024 expo in Seoul, South Korea, Samsung revealed its fully operational pilot production line for solid-state EV batteries, a key step towards mass production in 2027.
As Samsung SDI explained, “We built a pilot line last year to mass-produce all-solid-state batteries by 2027.”
Samsung has already delivered initial batches of the new batteries to EV manufacturers for testing.
Enhanced Performance and Range
Let’s keep it simple and focus on what Samsung is actually claiming. The company says its new solid-state battery could give electric cars up to 600 miles of range on a single charge, so most long trips would only need one or two quick stops.
Charging could take around 9 minutes, likely from about 10–80%, which is the usual range used to protect battery life. It could also last up to 20 years, or close to a million miles.
Another big upgrade is energy density, reaching 500 Wh/kg, which is almost double what current batteries offer. This means the battery can be smaller and lighter, giving cars more space inside and even better handling.
Overall, these batteries could make EVs go farther, charge faster, and last much longer. They are also expected to be safer than today’s lithium-ion batteries.
However, because they are expensive to produce, they will first appear in high-end electric cars. Samsung is also working on high-nickel batteries as a more affordable option for premium vehicles.
Higher energy density and faster charging
Samsung’s oxide solid-state battery technology delivers an energy density of about 500 Wh/kg, which is almost double the 270 Wh/kg found in most current EV batteries.
In simple terms, this could mean electric vehicles driving nearly twice as far on a single charge.
The company also claims a 9-minute charging time, which likely refers to charging from around 10–20% up to 80%, not a full 0–100% charge. This is normal in the industry, since charging slows down after 80% to protect battery life and keep it stable over time.
Samsung SDI stated: “We will not only match the price in the popular and entry-level segments, but also mass produce products that can be rapidly charged in 9 minutes by 2026.”
Why Solid-State Batteries Are a Huge Upgrade
Traditional lithium-ion batteries use liquid electrolytes. Samsung’s oxide-based solid-state design replaces that with a solid electrolyte. The result:
- Safer — dramatically lower risk of fires or thermal runaway.
- More efficient — less wasted space, so packs are smaller and lighter.
- Longer lasting — better cycle life and stability over time.
- Improved performance: Higher energy density for extended range
- Faster charging: Significantly reduced charging times
- Enhanced safety: Reduced risk of fires and explosions
- Smaller and lighter: More efficient use of vehicle space
Samsung SDI Vice President Koh Joo-young has been front and center on this strategy. The company is clear that these batteries will first land in “super premium” EVs because of higher production costs. But they’re also pushing hard on cost reduction for broader segments.
Samsung’s Broader Battery Strategy
To address cost and accessibility, Samsung is also developing:
- Lithium iron phosphate (LFP) batteries: More affordable and environmentally friendly
- Cobalt-free batteries: Reducing reliance on expensive and ethically sourced materials
- Dry electrode production: Lowering manufacturing costs
The Real-World Challenges (Because Nothing’s Perfect)
Let’s be honest solid-state batteries won’t fix everything overnight.
Charging infrastructure is still the biggest bottleneck. Even if a car can accept 480–600 kW (5C–6C speeds), those ultra-fast chargers are rare outside a few test corridors in China. Most public stations top out at 150–350 kW.
Competition is fierce too. Chinese makers like CATL are already shipping semi-solid and high-performance packs, and everyone is racing toward longer-life batteries.
Still, Samsung’s progress is real. They’ve moved from lab concept to pilot line in record time, and partnerships (including recent validation work with BMW) show the industry is taking this seriously.
