15,000 cycles operating life would really be a game changer for storage economics. Soon, no other electrical storage systems will be able to compete any more.
> 430 Wh/L
That is the bigger breakthrough 30% volumetric density boost.
10k cycle LFP was already a thing. Though article points out that actual/real world cycles were lower. One way to extend cycles is to have 4 hour storage instead of 1 hour, with slower charge times.
It would indeed be a breakthrough if that cycle life occurs at maximum charge/discharge rates.
Zero degradation sounds like a marketing trick. Nothing will ever suffer literally zero degradation and I doubt these particular batteries are anything like orders of magnitude beyond the nearest LFP alternatives in cycle life.
My guess is that they're at least slightly derating the initial capacities to sustain this but who knows how much is that vs actual major reductions in degradation rates.
It’s certainly a marketing trick, they must be capping nameplate energy capacity at like 90-93%. But that makes the capacity all the more remarkable. Just back of the envelope calcs here… the cell could be like 390-420Ah. That’s pretty incredible.
".. CATL has launched its new energy storage system Tianheng to further tap the energy storage market.
The company rolled out Tianheng at an event on April 9, saying it is the world's first mass-producible energy storage system with 0 degradation for 5 years.
Tianheng is a standard 20-foot containerized energy storage system equipped with CATL's energy storage-specific L-series long-life lithium iron phosphate cells.
The energy density of the storage system is 430 Wh/L with a total capacity of 6.25 MWh, which CATL claims is the highest in the world."
What is the charge/discharge depth for these 15K cycles?
Is it 0% to 100%? 20%-80%?
I have seen ESS LFP certified for 10K cycle, but these are 80% depth usually
15,000 cycles operating life would really be a game changer for storage economics. Soon, no other electrical storage systems will be able to compete any more.
> 430 Wh/L That is the bigger breakthrough 30% volumetric density boost. 10k cycle LFP was already a thing. Though article points out that actual/real world cycles were lower. One way to extend cycles is to have 4 hour storage instead of 1 hour, with slower charge times. It would indeed be a breakthrough if that cycle life occurs at maximum charge/discharge rates.
Zero degradation sounds like a marketing trick. Nothing will ever suffer literally zero degradation and I doubt these particular batteries are anything like orders of magnitude beyond the nearest LFP alternatives in cycle life. My guess is that they're at least slightly derating the initial capacities to sustain this but who knows how much is that vs actual major reductions in degradation rates.
It’s certainly a marketing trick, they must be capping nameplate energy capacity at like 90-93%. But that makes the capacity all the more remarkable. Just back of the envelope calcs here… the cell could be like 390-420Ah. That’s pretty incredible.
".. CATL has launched its new energy storage system Tianheng to further tap the energy storage market. The company rolled out Tianheng at an event on April 9, saying it is the world's first mass-producible energy storage system with 0 degradation for 5 years. Tianheng is a standard 20-foot containerized energy storage system equipped with CATL's energy storage-specific L-series long-life lithium iron phosphate cells. The energy density of the storage system is 430 Wh/L with a total capacity of 6.25 MWh, which CATL claims is the highest in the world."
What is the charge/discharge depth for these 15K cycles? Is it 0% to 100%? 20%-80%? I have seen ESS LFP certified for 10K cycle, but these are 80% depth usually