I'm doing some research for a new battery build where I aim to increase the energy density compared to my old builds (30Q & VTC6). The obvious route (at least for me) is to look into cells as Samsung 35E to push the number towards 240 Wh/kg @ 3A.
I can't find any 21700 cells that would go over 240 Wh/kg, or 18650 for that matter. Perhaps I'm missing some?
But then I found these:
Beijing WeLion New Energy Technology - (Semi?) Solid State ~248 Wh/kg. Link: http://www.solidstatelion.com/en/product_page/294.html
Foxtech - Diamond Semi Solid State 251.7 Wh/kg. Link:
https://www.foxtechfpv.com/foxtech-diamond-6s-22000mah-semi-solid-state-li-ion-battery.html
Grepow - Tattu NMC 811 (pouch) 275 Wh/kg . Link:
https://www.grepow.com/page/uav-battery.html
They all claim to have up to double the cycles compared to regular li-ion technology (600+), better temperature performance, higher energy density, higher discharge rate & charge rate.
This is news to me. Seems like WeLion is the real deal at least, supporting cells to NIO: https://cnevpost.com/2021/11/26/nio...ortedly-to-get-investment-from-xiaomi-huawei/
If this is true, I feel like many builds based on cylindrical cells is kind of obsolete when the spec/price is compared. Is there anyone here who has tested one of these packs? Could they really be that good? My project is 12S with 140A peak demand for a drone, so these semi solid state packs seems like the best route as energy density, temperature and cycle life is the crucial parameters.
Btw, what the heck is semi solid state? The internet seems a bit dry on info about this technology..
I can't find any 21700 cells that would go over 240 Wh/kg, or 18650 for that matter. Perhaps I'm missing some?
But then I found these:
Beijing WeLion New Energy Technology - (Semi?) Solid State ~248 Wh/kg. Link: http://www.solidstatelion.com/en/product_page/294.html
Foxtech - Diamond Semi Solid State 251.7 Wh/kg. Link:
https://www.foxtechfpv.com/foxtech-diamond-6s-22000mah-semi-solid-state-li-ion-battery.html
Grepow - Tattu NMC 811 (pouch) 275 Wh/kg . Link:
https://www.grepow.com/page/uav-battery.html
They all claim to have up to double the cycles compared to regular li-ion technology (600+), better temperature performance, higher energy density, higher discharge rate & charge rate.
This is news to me. Seems like WeLion is the real deal at least, supporting cells to NIO: https://cnevpost.com/2021/11/26/nio...ortedly-to-get-investment-from-xiaomi-huawei/
If this is true, I feel like many builds based on cylindrical cells is kind of obsolete when the spec/price is compared. Is there anyone here who has tested one of these packs? Could they really be that good? My project is 12S with 140A peak demand for a drone, so these semi solid state packs seems like the best route as energy density, temperature and cycle life is the crucial parameters.
Btw, what the heck is semi solid state? The internet seems a bit dry on info about this technology..