ArticlesBattery storage
Battery storage
Choosing, testing, protecting and storing lithium cells — from a single 18650 on the bench to a shelf of salvaged packs.
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New to battery storage? Read these three first.
If you want to know how to test 18650 cells, you are in the right place. Testing cells is one of the most important steps in preparing salvaged 18650 cells for reuse.
In this article, we will cover what lithium-ion cells are in and where to find them. We will also go over how to remove, test, sort, and charge salvaged 18650 cells. Let's get started!
Lithium-ion batteries are awesome. They are low-cost and can store a lot of energy. Building a lithium-ion battery is fun and rewarding, and building a charger is no different. When you can build your own lithium-ion battery charger, experimenting with all kinds of cell configurations is a lot more practical. For some use cases, building a battery charger is often cheaper than buying one and can provide a lot more performance.
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21
To reduce 48 volts to 24 volts, use a buck converter. This guide explains how to use constant voltage and constant current buck converters for efficient voltage conversion. Perfect for applications like battery charging and running simple loads.
Learn how to efficiently reduce 48 volts to 12 volts in your electronic projects. Discover the benefits of using buck converters over linear regulators for safer, cooler, and more efficient voltage reduction.
A lot of times when building a battery pack you may have some devices that run directly off the pack and some that need a voltage boost. We go over ways to boost 12v up to 24v so you can run 24v devices off your 12v pack. Sometimes certain things run even better off 24v compared to 12v for instance most UDB-C PD boards.
When building a 7s battery it is a common issue to need to reduce 24v down to 12v for various devices. Surprisingly this is very simple to do and can be achieved in 2 ways. It's always better to reduce voltage than to boost voltage due to the losses in boosting.
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23
Looking to find the highest capacity 21700 cells on the market, that's not always the top consideration also the market is filled with tons of cells. We put together this article to help guide you to legit high-capacity 21700 cells and what to watch out for to avoid buying a fake cell.
Heat is a major factor in reducing lithium battery life. Learn how exposure to sunlight, high currents, and low voltages can damage batteries, and discover effective strategies to enhance their lifespan.
Discover the two main types of Battery Management Systems (BMS): common port, which uses one port for charging and discharging, and separate port, which has distinct ports for each. Understanding these can help you choose the right BMS for your needs.
Sizing a portable power station is important to make sure the one you purchase meets your needs. There are a few things to consider to make sure you pick right the first time. Follow along with our guide here to help make your power station purchase a success.
Articles
22The one FAQ in battery storage: FAQ: Charging & Safety for Lithium Batteries
Monthly-ish. New tools, new cells in the database, guides worth reading.
About this topic
Battery storage, from single cells to whole banks
Battery storage covers everything that happens before a pack goes into a bike, a powerwall or a solar shed: choosing cells, testing and grading them, matching them into groups, protecting them with fusing and a BMS, and storing them safely between builds.
Lithium-ion cells hold a large amount of energy in a small space and tolerate deep discharge far better than lead acid, which is why almost every storage project now starts with them. The trade-off is that the cells have to be understood before they are trusted.
Most of these articles start from a question builders ask us: is this cell genuine, is it safe to reuse, how much current can it really take. Where a question has a number for an answer, the article links to the tool that calculates it.