Questions tagged [cell-balancing]

Cell balancing is a method of designing safer battery solutions that extends battery run time as well as battery life.

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71 views

How to unite three different batteries in to one powerbank [closed]

I'm absolute beginner in electrical engineering and I need help in building a powerbank using three different batteries with different characteristics. I have a sudden passion to implement this ...
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0answers
34 views

Mosfet Selection

I am designing Battery balance system for 16 series Lion(NCR18650) battery pack.I have decided to implement passive balance method.Battery cell voltages will be controlled by MCU and whenever a ...
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0answers
122 views

Multi-cell Li-ion battery charging

I am trying to make a charger circuit for a battery pack consisting of 6 lithium ion batteries (cells) in series. Many battery charger ICs support multi-cell charging but do not provide cell balancing ...
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1answer
66 views

Building a LiPo battery pack for output 270v DC

so this is related to my other question if anyone wonders. I’m building out a EV battery pack to boost charge a vehicle in real time during heavy duty cycles. The vehicle currently has no external ...
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1answer
36 views

Balance charging battery pack one-half at a time?

I'm trying to wrap my head around how I need to go about balancing charging a few NiMh battery packs. I'm using a HiTec x4 charger, which supports balancing charging up to 6 cells at a time. However, ...
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1answer
86 views

Simple Li Ion integrated Charger and balancer

I am currently working on a project, which should contain a Li-Ion battery pack in the form of 8 18650 cells in 4S2P. The main consumers of the build are a class D amplifier and a single board ...
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1answer
210 views

LiFePO4 cells - self-balancing in series or parallel?

I am building various banks / packs from individual prismatic LFP cells, nominal 3.2V each. New and pretty large, 60-400AH. I have a good power supply, charge each cell independently, Bulk stage CC ...
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1answer
137 views

Battery Balancing system [closed]

I am trying to build a Battery balancer system for 16S8P battery pack.It consist of li-on cells(NCR18650PF). I understood how serial balancing is working properly.If serial cells are not equal,an MCU ...
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3answers
98 views

Li-ion battery pack from non- identical batteries

I'm building a battery pack for my portable speaker, and I'm using a random collection of second hand Li-ion cells. I'm going to have cell phone batteries with differing capacities and also 18650 ...
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2answers
745 views

Multi-Cell Lithium battery balancing circuit explanation

I found a great application note on building a multi-cell lithium battery charger with cell balancing. http://www.cypress.com/file/70891/download The great thing about this one is that you implement ...
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1answer
53 views

Why or when does battery capacity matter in a series circuit?

I have 3 sets of doubled 18650 cells from a laptop battery, and I gather that it can be dangerous to use cells of different capacities in series. This question is more about the theory than practice. ...
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0answers
267 views

Do NiMH demand balancing?

Is it fine to charge a pile of 8 2 Ah AA NiMH @ 11.6 V 0.5 A serially? They are from the same packaging and were bought only for use as an 8x pack - they were not used for anything else. Im not sure ...
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1answer
4k views

series charging three 18650 batteries with three chargers off the same 5V supply [duplicate]

being from a CS background I am a complete noob at this. I'll keep this short. I have a couple of 18650 batteries that i salvaged from an old laptop battery. I want to make a balanced 3S charger with ...
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1answer
118 views

Charging Li-Ion string with cells of different capacities

I was trying to understand what is the worst case scenario of using a string of 4 lithium ion cells (18650 cells, 3.6V nom) in series to form a battery pack, without balance circuitry, to understand ...
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0answers
167 views

How can 8.4V stacked super-capacitors (EDLC) not require balancing?

I've recently seen 8.4V stacked super-capacitors which advertise themselves as "not requiring any balancing". Namely, the 196HVC series from Vishay. How can this be true? Even if the cells are ...
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2answers
936 views

Finding the right battery management system for LiPo

I am building a "smart" battery by combining a bunch of Samsung 18650 cells with a battery management board that handles charging/discharging/protection. The enclosure I plan to use allows for 4 x 7 ...
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0answers
131 views

Large 12 kWh 18650 Lithium-ion power pack - best nSmP configuration [duplicate]

I need to build a 12 kWh lithium-ion power pack for an e-drive system. The cells will be Panasonic NCR 'B' at 3.4 Ah 18650, which have been sourced at about $3.75 a cell. Approximately 1,000 cells ...
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1answer
1k views

DIY 4*18650 Batteries charger with TP4056 paralel problem with how to balance it

days ago I did this project like the pic which is a DIY for 4*18650 OR 6*18650 (NOW I MADE 4 AND LET`S STICK TO IT) Sony vtc5a charger 3.7 v with new tp4056 with protection (copied from one youtube ...
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0answers
467 views

Li-ion battery charging and cell balancing

Is there a solution where a single chip can handle Li-ion battery pack charging and cell balancing as well. I was looking into TI's range of battery management products and their battery charger ...
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0answers
84 views

Passive Cell balancing affecting Gas Gauge Coulomb Count

I am designing a solar 7.4V Li battery charger, and want to include gas gauging, and cell balancing. If I use passive cell balancing, I waste power and cause my coulomb counter to lose count. Is there ...
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1answer
146 views

Best 12v battery solution

Beginner with battery tech here, so forgive my naivety :) I'm making a portable bluetooth speaker, and am wondering about the best battery solution to use. The amp needs 60W max, and accepts 12-24V....
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3answers
679 views

Charge/Discharge a Battery Pack Wired as a Segregated Paralleled Series

This is my first post on EE, so I'll try to be as simple but detailed as I can. I have a 12S10P pack that I want to segregate into a 6S4P + 6S4P, 6S3P + 6S3P, 6S3P + 6S3P for "cautionary" LiIon ...
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2answers
532 views

Balance cable for LiPo batteries

I am using 4 2 cell 5000mAh 60C LiPo's in series to drive a robot I am building for Robot Wars (Scorpinator - look out for it). Each battery came with a balance cable built into the discharge cables ...
8
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1answer
11k views

How does a battery balance and protection circuit work?

I am building a 4S LiPo battery pack that I would like to incorporate in a portable speaker project and I need to make sure the batteries will never require maintenance beside replacing them ...
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1answer
5k views

How many battery cells in a smartphone?

Are most batteries built into smartphones (e.g. iPhone) single cell batteries? If so, why might that be?
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2answers
3k views

li-ion balancing with zener diodes

Would there be any potential problems with the below implementation of a rudimentary li-ion balancing/(overcharge protection) circuit? Would a resistor need to be in series with the zeners? simulate ...
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3answers
907 views

Battery Pack Management: need to balance during discharge?

I'm looking into the fault detection and monitoring subsystem of out unmanned vehicles (airborne and ground-based) batteries. We employ LiPo-battery packs of various configurations which are charged ...