It’s great to see that you are keeping these older EVs alive by providing new battery packs for them. Good stuff! Next time I am in China will need to visit you guys in Hubei to see the operation for myself.
@@silvy7394 When the battery level of the lithium battery is lower than 20%, it is normal for the voltage difference to be slightly larger. There are two reasons for this. First, the discharge curve of each battery cell cannot be completely consistent, which will result in different voltages. Second, when the battery level of the lithium battery is low, the internal chemical reaction will be unstable, which will also result in different voltages between the battery cells. We usually focus on whether the voltage difference value is appropriate when SOC is 20%~100%.
ahh!? that battery temp gauge is really up there. probably would be a good idea to add some type of cooling methods with this battery upgrade. especially with NMC cells. which makes everyone nervous as NMC has thermal runaway risks just like LIPO batteries.. LTO or LIFEPO4 lithium ion battery or Na-ion, chemistries are a safer option, it be nice to get these for the leaf.
LTO/LFP battery cells are not suitable for Leaf Please trust Leaf's BMS. Its safety control strategy design is the most conservative I have ever seen. Once the temperature exceeds the limit, it will limit the input power or even stop charging directly.
Hi, interesting but this is not how most people use fast charging. Most of the time we only charge to 70% or 80% to get the best charging speed, drive 200km and then charge again to 70% or 80% etc ... Can you do a kind of road trip like this with multiple fast charge in one day and see how the temperature rise and how fast it will charge ?
This is a very challenging test plan, and the biggest problem for me is that I don't have time to do this test right now. I have made a note of it and I will arrange it.
@@fernandinand The 40kw fast charging power lasts until SOC is about 70%. Unfortunately, there is no English version of this fast charging app. I have marked the key data as much as possible. If you still have any questions, please feel free to discuss with me.
@@CoraLiu-VIVNE If constant charge curve @~40kW reaches 70%SOC, that means we should charge this pack from ~20% to 80% SOC in about 45 minutes? That's the real test a regular user wants to see...not a full charge on rapid charger from 5% to 100% (IMHO)
@@fernandinand Thank you, that is a good suggestion. In fact, our test this time is to check the temperature changes of CATL battery cells during fast charging in extremely hot weather. We will find an opportunity to do the test you mentioned in the future.
@@CoraLiu-VIVNE please make a high power charge test with 2 stops for a regular long trip with around 500km in order to check for rapid gate charging issues. That would be a normal real world test.
We did that😀, we can provide battery upgrades for the entire range of Leaf vehicles, can upgrade to 40/50/62kWh, you can add my WhatApp: +8615211174371 or send me Email: cora@vivnevs.com for all the details if you need
Yes, it is, and we can ship the battery to the US by sea, you can add my WhatsApp: +8615211174371 or WeChat: 15211174371 for all the details, thank you.
It’s great to see that you are keeping these older EVs alive by providing new battery packs for them. Good stuff! Next time I am in China will need to visit you guys in Hubei to see the operation for myself.
Welcome to China, welcome to discuss more about electric vehicle battery replacement with us.😄
@@CoraLiu-VIVNE Amazing. Thank you and I will defiantly be in touch before my next trip.
@@LeftCoastEVNo problem, Looking forward to your arrival.😄
For those wondering 96mv at 318v aint too bad, and all the cells are at a similar voltage.
@@silvy7394 When the battery level of the lithium battery is lower than 20%, it is normal for the voltage difference to be slightly larger. There are two reasons for this. First, the discharge curve of each battery cell cannot be completely consistent, which will result in different voltages. Second, when the battery level of the lithium battery is low, the internal chemical reaction will be unstable, which will also result in different voltages between the battery cells. We usually focus on whether the voltage difference value is appropriate when SOC is 20%~100%.
ahh!? that battery temp gauge is really up there. probably would be a good idea to add some type of cooling methods with this battery upgrade. especially with NMC cells. which makes everyone nervous as NMC has thermal runaway risks just like LIPO batteries.. LTO or LIFEPO4 lithium ion battery or Na-ion, chemistries are a safer option, it be nice to get these for the leaf.
LTO/LFP battery cells are not suitable for Leaf
Please trust Leaf's BMS. Its safety control strategy design is the most conservative I have ever seen. Once the temperature exceeds the limit, it will limit the input power or even stop charging directly.
Hi, interesting but this is not how most people use fast charging. Most of the time we only charge to 70% or 80% to get the best charging speed, drive 200km and then charge again to 70% or 80% etc ...
Can you do a kind of road trip like this with multiple fast charge in one day and see how the temperature rise and how fast it will charge ?
This is a very challenging test plan, and the biggest problem for me is that I don't have time to do this test right now. I have made a note of it and I will arrange it.
Thank you for the charging curve. So it should top around ~40kW until ~50%SOC...Is this correct? Figures shown are hard to read. 😅
@@fernandinand The 40kw fast charging power lasts until SOC is about 70%. Unfortunately, there is no English version of this fast charging app. I have marked the key data as much as possible. If you still have any questions, please feel free to discuss with me.
@@CoraLiu-VIVNE If constant charge curve @~40kW reaches 70%SOC, that means we should charge this pack from ~20% to 80% SOC in about 45 minutes? That's the real test a regular user wants to see...not a full charge on rapid charger from 5% to 100% (IMHO)
@@fernandinand Thank you, that is a good suggestion. In fact, our test this time is to check the temperature changes of CATL battery cells during fast charging in extremely hot weather. We will find an opportunity to do the test you mentioned in the future.
@@CoraLiu-VIVNE please make a high power charge test with 2 stops for a regular long trip with around 500km in order to check for rapid gate charging issues. That would be a normal real world test.
@@fernandinand Very good suggestion, we will arrange it as soon as possible, let us look forward to it together.
How did you get that battery for a LEAF that old? May want to buy soon. I'm at 8 bars.
We did that😀, we can provide battery upgrades for the entire range of Leaf vehicles, can upgrade to 40/50/62kWh, you can add my WhatApp: +8615211174371 or send me Email: cora@vivnevs.com for all the details if you need
Is this an aftermarket battery? Can it be purchased in the US?
Yes, it is, and we can ship the battery to the US by sea, you can add my WhatsApp: +8615211174371 or WeChat: 15211174371 for all the details, thank you.