Questions tagged [battery-balance]

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6 answers
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Is it possible for series connected battery cells to provide different currents?

I know current through series elements is always the same. I was wondering if the same is true for series supplies (batteries) or if it is possible for one supply to provide more or less current than ...
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  • 139
2 votes
1 answer
359 views

Identify chip on 2S BMS / Balance card

I picked up a bunch of Chinese-made 2S BMS / Balance boards. As is the norm with inexpensive Chinese boards, they came with essentially NO documentation aside from how to hook the board to the ...
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1 vote
3 answers
84 views

Balance charge unknown number of LiPos in series

This exact question has already been asked here, but no answer was given so I'm reposting it. I want to charge an unknown number (between 1 and 8) of 1s LiPos in series with my balance charger (ISDT ...
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0 votes
2 answers
446 views

What should a 12v solar battery read while in use?

I have a 12v solar system with 2 12v batteries (One marine, other a car battery). My inverter has a minimum voltage input of 11.0v and peak of 15.0v, but when I'm running it under load, I get a ...
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0 votes
2 answers
665 views

Is it possible to charge a laptop with a DC-DC converter using a 12V deep cycle battery

Am just curious if I can use a DC-DC converter and 12v deep cycle battery to power a laptop directly.
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0 votes
1 answer
224 views

Individual cell balancing on multiple packs

UPDATED: I edited my question to clarify I'm building a 4s4p pack with 18650's. What is the best method to achieve on a per-cell balancing & protection if that makes sense? Most of the 4s BMS I ...
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  • 1
0 votes
0 answers
36 views

Is using a non-balance protected lithium-ion battery ok?

I am building a project where I use 4 stepper motors. Since they require a lot of power I am considering using a Lithium-Ion battery for them. This is what I was looking at: https://www.onlybatteries....
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0 votes
3 answers
63 views

Is it acceptable to connect a car battery and an AGM battery in parallel?

I power a 12V fridge in my car either via the car battery (when the vehicle is running) or via an AGM battery. There is an Anderson outlet in the car connected to the car battery to which I attach a 3 ...
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  • 175
0 votes
0 answers
64 views

Nested load balancing

MOTIVATION I was helping my dad decide on batteries and a BMS for a photovoltaic system. He intended to combine 12 and 24 v batteries. I told him that is not advisable to mix batteries. But I got hung ...
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  • 101
0 votes
0 answers
31 views

How to connect old and new BMS together on 10S5P Lithium Ion powerpack

I have configured 10S5P lithium power pack, because the old lithium batteries had almost no capacity. So I am having the following problem, the old BMS is a 8S BMS, because I have configured 10S ...
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  • 1
0 votes
0 answers
46 views

How to make battery balance charger for two 18650 batteries?

I am on a collage project, it requiring two 18650 li ion batteries. boost converter and solenoid lock mechanism requires can't operated through a single battery, and there is no balance charging ...
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0 votes
1 answer
122 views

Which cell balancing method is best to use and implement for low-voltage (48V battery stack) battery management system for E-bike application? [duplicate]

I would like to design a battery management system for low voltage systems. I am developing a BMS for a 48V, 20Ah battery pack system. When it comes to battery balancing, I am confused in between ...
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