Doctorbass
100 GW
I decided to show you what is a good way to dissassemble the makita 3Ah pack:
Oh.. before some advices...
IF YOU DONT PLAN TO USE THE PACK WITH IN FEW DAYS OR WEEKS' I SUGGEST TO CHARGE OR TAKE APPART THE CELLS FROM THE PACK TO AVOID THE BMS TO DRAIN THEM.. JUST LIKE YOU SHOUD DO WITH EVERY LITHIUM OPERATED DEVICE THAT USE A BMS SUCH AS LAPTOP REQUIRE ETC...
- take appart the low cells ( under 2.9 or 3.0V) and keep them away from your work bench.. this will avoid you to introduce them by mistake in your new pack! ( some will keep the cells above 2.5V and under 2.9 or 3.0V and will make a booster pack.. This is an excellent idea if you have some voltage margin availlable from your controler max voltage
- Return the bad cells to recycling!!! dont trash them!.. be eco friendly! ( you can put some tape on the tab to avoid short when they are all together touching others!
- make sure to charge the cells to the same level BEFORE TO PARALLEL THEM TOGETHER.. or ensure to have less than +/-150mV difference
-When assembling multiple parallel group, ensure to have an insulator between the cells from one group to the next to avoid short dur to fragile green skin of these 18650 format cells. This will prevent short during vibration of your new assembled pack!
-Before to use the pack flully charge ALL the cells to 4.1V or 4.2V.. (4.1 will prolong the life of these cells but will give you a bit less capacity)
-Dont OVERHEAT THE CELLS TAB! that will damage the cells ( the trick of soldering on the nickel sheet that is already spotwelded on them if to prevent this... and avoiding you to remove the white stuff :wink:
-For 90% of people that dont want this step or dont have the equipment to match the cells to get perfect groups of the same total capacity, i suggest to mix ALL the cells and than to randomly pick some to make your parallel cells groups,
-REMOVE ANY JEWELRY or watch... this will prevent KFC !! and plasma event in your shop !!
UPDATE 2017
For the common 3Ah packs!!
Complete Procedure onb HOW to dissassemble the 3Ah packs
See the PDF file called 3Ah and 4Ah makita Battery dissassembly Instruction.pdf below
HOW TO DISASSEMBLE MORE RECENT MAKITA PACKS
[youtube]Oz6Uis05ewA[/youtube]
Oh.. before some advices...
IF YOU DONT PLAN TO USE THE PACK WITH IN FEW DAYS OR WEEKS' I SUGGEST TO CHARGE OR TAKE APPART THE CELLS FROM THE PACK TO AVOID THE BMS TO DRAIN THEM.. JUST LIKE YOU SHOUD DO WITH EVERY LITHIUM OPERATED DEVICE THAT USE A BMS SUCH AS LAPTOP REQUIRE ETC...
- take appart the low cells ( under 2.9 or 3.0V) and keep them away from your work bench.. this will avoid you to introduce them by mistake in your new pack! ( some will keep the cells above 2.5V and under 2.9 or 3.0V and will make a booster pack.. This is an excellent idea if you have some voltage margin availlable from your controler max voltage
- Return the bad cells to recycling!!! dont trash them!.. be eco friendly! ( you can put some tape on the tab to avoid short when they are all together touching others!
- make sure to charge the cells to the same level BEFORE TO PARALLEL THEM TOGETHER.. or ensure to have less than +/-150mV difference
-When assembling multiple parallel group, ensure to have an insulator between the cells from one group to the next to avoid short dur to fragile green skin of these 18650 format cells. This will prevent short during vibration of your new assembled pack!
-Before to use the pack flully charge ALL the cells to 4.1V or 4.2V.. (4.1 will prolong the life of these cells but will give you a bit less capacity)
-Dont OVERHEAT THE CELLS TAB! that will damage the cells ( the trick of soldering on the nickel sheet that is already spotwelded on them if to prevent this... and avoiding you to remove the white stuff :wink:
-For 90% of people that dont want this step or dont have the equipment to match the cells to get perfect groups of the same total capacity, i suggest to mix ALL the cells and than to randomly pick some to make your parallel cells groups,
-REMOVE ANY JEWELRY or watch... this will prevent KFC !! and plasma event in your shop !!
UPDATE 2017
For the common 3Ah packs!!
Complete Procedure onb HOW to dissassemble the 3Ah packs
See the PDF file called 3Ah and 4Ah makita Battery dissassembly Instruction.pdf below
HOW TO DISASSEMBLE MORE RECENT MAKITA PACKS
[youtube]Oz6Uis05ewA[/youtube]