Questions tagged [battery-balance]
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22 questions
0 votes
1 answer
115 views
Wouldn't taking power from part of a lithium battery cause imbalance?
In the attached schematic of a bms, the mosfet gates require around 12v to switch on/off. So they are directly taking power at the 3rd cell B3. Wouldn't this cause imbalance with the remaining cells(...
- 1,444
0 votes
1 answer
129 views
Adding battery balancing circuit to existing BMS?
The Radiomaster Pocket is an RC controller powered by two 18650 cells. The internal BMS is defective and does not balance the two cells according to this source. Other functionality (over/under ...
- 144
1 vote
2 answers
122 views
Charging with load balance. Always or periodically? (li-Ion)
Having an external charger with Li-Ion load balance (based in passive balance; resistors). Is the best practice to charge a li-ion battery pack *1 always with load-balancing? Or is better to apply &...
- 173
0 votes
2 answers
123 views
Designing battery voltage measurement with passive balancing
At work I have been busy designing a circuit for measuring the voltages of three batteries that are connected in series to each other. A microcontroller will read the voltages and determine which is ...
- 131
1 vote
1 answer
258 views
Secondary Connection for Transformers in Active Balancer using LTC3300-1
I am currently trying to implement an active balancer based on the LTC3300-1 (I have proposed the diagram based on the directions in the datasheet) but, about the connection for the secondaries of the ...
- 441
1 vote
0 answers
175 views
Transformer connection for active balancer
I am currently looking to implement an active balancer based on the LTC3300-1 for a 3-S LiPo array but I am unsure with the transformers, the datasheet shows how to connect the IC for a 3-S array. I ...
- 441
2 votes
4 answers
4k views
Lithium battery pack charge controller and balancer module function (HX-4S-F30A)
I tried to use this module for a 4S 18650 battery pack: Beside charge controlling it is supposed to balance cells and this is where my issue emerges. If I put some unevenly charged cells in the pack, ...
- 513
3 votes
1 answer
504 views
Modify lithium battery pack balancer
This is the lithium battery pack balancers available to me: As Robojax has extensively explained in this video, this module is capable of balancing batteries with 67mA current (4.2v/62ohm) that is ...
- 513
5 votes
3 answers
451 views
How to design a simple circuit for detecting unbalanced Li-ion parallel cells?
I would like to design a "safety" device able to tell me if a 3 parallel Li-ion cells module is voltage balanced or not. EDIT (after @winny's comment): It’s needed if the user connects cells ...
- 163
0 votes
0 answers
158 views
Limitations of Li-ion (18650) balance charge using current bypass method
I have built a battery pack using some old (but working) 18650 cells I had. The 4S4P battery pack diagram follows: I tried to balance charge it with my IMAX B6AC v2 (4S, TVC = 4.2V, i=2.5A, w/ ...
- 689
2 votes
1 answer
2k views
Battery balance circuit gives zero volts at output
I've built the setup below for 2 Lithium-ion batteries in series: The battery balance module is an FDC-2S-2 (I can't find a datasheet, weirdly): Problem: Even though I read 7.5 V between B+ and B-, ...
- 902
2 votes
1 answer
279 views
Identity of SOT23-5 Lipo Battery Monitor IC
Please can anyone help with identification of a sot 23-5 package marked GCLK in a single channel of a rechargeable lipo balance circuit
0 votes
0 answers
2k views
How to solder two 3.7 V LiPo batteries in series and then balance charge them
For a project, I need to power an Arduino Nano 3.3 V BLE. The Nano accepts 5-21 V on its VIN pin and then regulates that voltage down to the 3.3 V it needs. To do ...
- 101
0 votes
0 answers
72 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....
- 13
1 vote
3 answers
381 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 ...
- 71