Do these batteries catch on fire or blow up like the labtop batteries? Thermal runaway or anything? Seems like there is 2 different konion batteries. This vt battery and then another one v. Are they both safe or what? Also how many cycles do you get out of the 2 different types.
Another 36V Li-ion Battery : BOSCH !!
- Thread starter Doctorbass
- Start date
I'll answer my own question.
• High power Cylindrical Lithium Ion battery (V Cell, VT Cell Series)
By using Nickel/Manganese mixture in the positive electrode, stability in high temperature conditions have been achieved, also achieving safe usage with high level of current, this being the characteristics of V/VT series. By the combination with high-voltage, which is the characteristics of lithium ion batteries, usage in the high-power output application field (such as power tools, cleaners, motor assisted bicycles) will be ideal, where conventionally Nickel-Cadmium, Nickel-Hydrogen batteries were used. In the 18650V cell, maximum output of 10A, and in the 6650VT cell, maximum output of 50A have been achieved.
«Main Specifications of High-Power out-put Cylindrical Lithium Ion Battery»
Cell Type 18650V
Size diameter:18mm, height:65mm
Capacity (0.2CmA) 1600mAh
Standard Charging Voltage 4.2V-2.5V
Energy Density 250Wh/L
Max. Output 10A
Weight 44g
Cell type 26650VT
diameter:26mm, height:65mm
2500mAh
4.1V-2.5V
250Wh/L
50A
90g
• High power Cylindrical Lithium Ion battery (V Cell, VT Cell Series)
By using Nickel/Manganese mixture in the positive electrode, stability in high temperature conditions have been achieved, also achieving safe usage with high level of current, this being the characteristics of V/VT series. By the combination with high-voltage, which is the characteristics of lithium ion batteries, usage in the high-power output application field (such as power tools, cleaners, motor assisted bicycles) will be ideal, where conventionally Nickel-Cadmium, Nickel-Hydrogen batteries were used. In the 18650V cell, maximum output of 10A, and in the 6650VT cell, maximum output of 50A have been achieved.
«Main Specifications of High-Power out-put Cylindrical Lithium Ion Battery»
Cell Type 18650V
Size diameter:18mm, height:65mm
Capacity (0.2CmA) 1600mAh
Standard Charging Voltage 4.2V-2.5V
Energy Density 250Wh/L
Max. Output 10A
Weight 44g
Cell type 26650VT
diameter:26mm, height:65mm
2500mAh
4.1V-2.5V
250Wh/L
50A
90g
From Doc Bass but no link to actual test results. Just talk, no proof!
Doctorbass
100 GW
I will answer on that question by two way: Used and brand new cell
The 18650V :
Used cell (under 100 cycles):
- Max Current use: 15A (10C) max discharge current and not 10A like mentionned on many website.
- Built-in safety against overheating
- Capacity: some website mention 1500-1600 mAh .. i would say 1500 after many test i did at 1C
- The internal resistance is around 50 miliohms
- The recommanded voltage range is 4.2 - 3.0V
Brand new cell:
- Max Current use: 15A (10C) max discharge current and not 10A like mentionned on many website.
- Built-in safety against overheating
- Capacity: some website mention 1600 mAh at 1C
- The internal resistance is around 30 miliohms
- The recommanded voltage range is 4.2 - 3.0V.. some will say 2.5V.. but i would not recommand that if used without balancer
The 18650VT :
Used cell (under 100 cycles):
- Max Current use: 12C (15A)continuous discharge, 20C (26A) short bursts
-Built-in safety against overheating
- Capacity: some website mention 1100-1300mAh .. i would say 1300 after many test i did at 1C
- The internal resistance is around 35 miliohms
- The recommanded voltage range is 4.2 - 3.0V
Brand new cell:
- Max Current use: 12C (15A)continuous discharge, 20C (26A) short bursts
-Built-in safety against overheating
- Capacity: some website mention 1100 mAh some say 1300 at 1C
- The internal resistance is around 25 miliohms
- The recommanded voltage range is 4.2 - 3.0V.. some will say 2.5V.. but i would not recommand that if used without balancer.
The main difference between the V and the VT is that the VT is made to deliver higher current and higher C than the V.
but doing that sacrifice a little bit of mAh.. around 300mAh.
The internal resistance of the VT is lower than the V
The capacity of the V is higher than the VT
Tn the makita 18V pack, the 1.5Ah use 5s1p of the 18650VT.. so they should say 1.3Ah and not 1.5.. but it's for commercial reason i guess..
For the 3Ah pack, it use the 18650V that have 5s2p of the 1600mAh so this is more like 3.2Ah..
Here is some data i collected over the internet:
HERE IS THE ANSWER FOR YOU D-MAN ABOUT TEST RESULTS the German people seems to appreciate them for the RC use the most information about these konions come from them
http://www.elektromodellflug.de/akku-test/LiIonM-1100.htm
The 18650V :
Used cell (under 100 cycles):
- Max Current use: 15A (10C) max discharge current and not 10A like mentionned on many website.
- Built-in safety against overheating
- Capacity: some website mention 1500-1600 mAh .. i would say 1500 after many test i did at 1C
- The internal resistance is around 50 miliohms
- The recommanded voltage range is 4.2 - 3.0V
Brand new cell:
- Max Current use: 15A (10C) max discharge current and not 10A like mentionned on many website.
- Built-in safety against overheating
- Capacity: some website mention 1600 mAh at 1C
- The internal resistance is around 30 miliohms
- The recommanded voltage range is 4.2 - 3.0V.. some will say 2.5V.. but i would not recommand that if used without balancer
The 18650VT :
Used cell (under 100 cycles):
- Max Current use: 12C (15A)continuous discharge, 20C (26A) short bursts
-Built-in safety against overheating
- Capacity: some website mention 1100-1300mAh .. i would say 1300 after many test i did at 1C
- The internal resistance is around 35 miliohms
- The recommanded voltage range is 4.2 - 3.0V
Brand new cell:
- Max Current use: 12C (15A)continuous discharge, 20C (26A) short bursts
-Built-in safety against overheating
- Capacity: some website mention 1100 mAh some say 1300 at 1C
- The internal resistance is around 25 miliohms
- The recommanded voltage range is 4.2 - 3.0V.. some will say 2.5V.. but i would not recommand that if used without balancer.
The main difference between the V and the VT is that the VT is made to deliver higher current and higher C than the V.
but doing that sacrifice a little bit of mAh.. around 300mAh.
The internal resistance of the VT is lower than the V
The capacity of the V is higher than the VT
Tn the makita 18V pack, the 1.5Ah use 5s1p of the 18650VT.. so they should say 1.3Ah and not 1.5.. but it's for commercial reason i guess..
For the 3Ah pack, it use the 18650V that have 5s2p of the 1600mAh so this is more like 3.2Ah..
Here is some data i collected over the internet:
HERE IS THE ANSWER FOR YOU D-MAN ABOUT TEST RESULTS the German people seems to appreciate them for the RC use the most information about these konions come from them
http://www.elektromodellflug.de/akku-test/LiIonM-1100.htm
Attachments
Doctorbass
100 GW
D-Man said:
I dont know about the 26650..
try searching on rcgroup forum..
Doc
richardone
1 µW
- Joined
- Apr 14, 2009
- Messages
- 1
I have been using the 36 volt Bosch batteries since they were released. I made a pocket bike for my son 500 watts and it has reasonable performance and life. The battery clip can be made from a cut off piece of a 2x4 milled with indent and some pipe clips inserted from the back. Snaps right on. This series 72 volt stuff I am reading is a bit scary. Keep in mind these batteries have a LOT of energy its not the 2.5 amps its the internal resistance that is so low. This makes the battery blast out amps on full load. Lithium batteries can EXPLODE so be careful trying to charge them on the bikes.
theyerb
100 W
If you're referring to the Fatpack, BAT836, it's highly unlikely that they'll explode. They use lithium-manganese chemistry, I believe, which is relatively safe. But hey, I suppose it's possible. 
