#12 volt lithium car battery install#
#12 volt lithium car battery upgrade#
#12 volt lithium car battery portable#
#12 volt lithium car battery series#

After that nickel-plated strips with a cross-sectional area of 7 mm x 0.15 mm were spot welded to the cells in such a way as to make a 3S7P (3 cells in series 7 cells in parallel) battery pack as you can see in the image below.įinally, after coating the 6 terminals of the BMS with some melted soldering wire, we attached two small wires of 1 square millimetre cross-sectional area to the main input/output terminals of the BMS.

Then the cells were bound by some polyimide adhesive tape aka Kapton tape and 18650 ring insulators made of barley paper were attached around the positive terminals of the cells. But we had to somehow hold the cells together as well and hence we decided to go for some double-sided adhesive tape. On the other hand, we still needed to find a way to keep the cells physically separated from each other to prevent thermal runaway so that even if one cell overheats then the remaining ones would remain unaffected up to an extent. However, we could not fit the cells inside the case if we used the plastic spacers and hence we had to go ahead without the spacers. Here are the details of the cells from left to right in the image above that we found online as follows :. Similar to the ones above, my son managed to salvage more cells from dead battery packs of laptop computers that he purchased from computer repair shops near our location. The image below shows the 3 cells in perfectly fine working condition that my son managed to salvage from his own laptop computer's dead battery pack.

#12 volt lithium car battery install#

In our instance, we found that we could install exactly 21 such cells inside the case while accounting for the battery management system (BMS) printed circuit board (PCB) as well. So put your seatbelts on, grab a snack, grab a drink and let us begin.įirstly, we needed to determine how many 18650 model cells could be installed in a 3S (3 cells in series) configuration inside the lead-acid battery's case. Hence, for fear of being repetitive, this thread will be a largely pictorial account.

#12 volt lithium car battery portable#

For that, he drew heavily from the experience gained during an earlier DIY project involving the making of a portable power station ( link). And since the prices of lithium battery packs are exorbitant (relatively speaking), my son decided to make one by himself again using salvaged cells from dead laptop computer battery packs.

#12 volt lithium car battery upgrade#

As a result, we decided that we have had enough and wanted to upgrade to a lithium battery. Recently, that battery started showing signs of dying again. That battery weighed approximately 2.25 kilograms. We had been using that battery for the past 2 years as a solar battery (with a 50 watt solar panel) for running a small fan (6-7 watts), a small dimmed light (3.5 watts) and the occasional charging of USB devices. We had a 6 year old UPS (Uninterruptible Power Supply) battery of capacity 7.5 Ah that had died twice in the past and had been refurbished twice with some fresh battery acid solution. Here is how my son made a 12v Lithium-ion battery but first a little background information. If it looks like a lead-acid battery then it must be a lead-acid battery, right ? Not necessarily Making a DIY 12v Lithium-ion battery at home Please contact us and we can check for you.įor more info & usage notes for our lithium batteries, please click here.BHPian Chhanda_Das recently shared this with other enthusiasts.

If this connection does not meet your needs, you may also view alternative adapters here.įor out of stock kits, we may be able to provide another compatible charger. The Aegis battery has a built in battery management system (BMS) that keeps the battery running at peak performance and protects the cells for thousands of cycles, including over-charge, over-discharge, over-current, and short-circuit protection. Making it a perfect drop in solution for your applications. This battery comes with the Anderson PP45 Power Pole Connection used for Charging and the SB50 (Grey) Connection used for Discharging. It is perfect for E-scooters, E-bikes, Solar Applications, Robots, and Other applications that require a higher-energy density battery. The Aegis Battery 12V 30Ah Li-ion Battery is a state of the art rechargeable battery pack.