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Questions tagged [lifepo4]

All related to lithium iron phosphate (or LFP) batteries

0
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3answers
70 views

Massive Parallel Lithium Lead Wire Connection Point

I was wondering where the connection point should be on a "massive" parallel block of lithium batteries. Let's say there is a pack of 100 LiFePo4 18650 batteries all spot welded together with nickel ...
0
votes
2answers
82 views

charging 24v LiFePO4 with DC power supply intended for LED strip lights

I want to charge my 200Ah, 8 cell GBS LiFePO4 using my Honda 2000 watt generator. (I live on a boat). I have a BMS, active monitoring and all that. I just want to make sure the below power supply is ...
3
votes
1answer
476 views

Lifepo4 current limiter with supercapacitor in parallell

I am making a LiFePo4/supercapacitor-hybrid. Spike current draw can reach 300A for a few seconds. The LiFePo4 batteries I am using is rated for 100A max discharge rate. In order to make sure the ...
1
vote
1answer
21 views

VDC booster effect on LiFePo battery run time?

Looking for info to devise a solution for a mobile video rig. I work in the film industry and it would be VERY beneficial to run my video cart from battery power, as opposed to always having to plug ...
1
vote
1answer
24 views

changing 6v lead blocks by 3,2v LiFePo4 cells

I need to replace a lead battery system with a LiFePO4 element system. the existing system is 48V 240Amp and consists of 8 Trojan T145 6V Batteries with 240Amp in the C20, the idea is to replace this ...
0
votes
1answer
22 views

Multi-cell LiFePO4 charger ICs

I've been looking for a monolithic battery charging / load sharing PMIC that is designed to work with up to 3 or 4 LiFePO4 cells. I had a search on Digikey and could only find one ($6!) chip and that ...
0
votes
1answer
30 views

Increasing TPS63001 Under Voltage lockout from 1.8V to 2.5V for use with LiFePO4 cell

The Under Voltage Lockout threshold for this chip ranges from 1.5 V to 1.8 V. I want to use this with a LiFePO4 cell, whose minimum voltage is 2.5 V. With reference to the datasheet here, the VINA ...
0
votes
1answer
643 views

Calculate LifePo4 charging amps

How do I work out the optimum charging amps for a life 2p4s battery? I have 8 x 66ah sinopoly batteries. http://www.sinopolybattery.com/userfiles/files/SP-LFP66AHA.pdf Charge Specs * Standard ...
0
votes
1answer
282 views

Using switching to control load sharing of DC?

I'm not sure of the right terminology for what I am trying to ask about. Feel free to suggest a better question title. Lets say that I have a fully charged LiFePO4 battery, which I do not want to ...
2
votes
0answers
153 views

Load Sharing/Isolation Circuit with ADP5063

I'm designing the battery power/charging circuit for the Reform DIY laptop which uses a (big) LiFePo4 cell. For the charger IC I've now settled on ADP5063 as it seems simple and can charge with 1.5A ...
1
vote
0answers
91 views

Boost converter voltage drop when charging battery

I made a 4s battery pack made of 18650 LiFePO4 cells that I'm planning to use for a mobile computing hobby project. My plan for charging it is to use a salvaged power supply from a computer along ...
1
vote
0answers
59 views

How can I balance 2 separate LiFePo4 batteries?

On my boat I've got devices that run on 24V and others that run on 12V. Seeing as how the alternator, wind generator and solar panels are all generating 24V, I guess it's fair to say that this is ...
1
vote
0answers
266 views

Help needed with over discharge circuit on LifePo4 12V car battery replacement

I'm putting together a LifePo4 battery pack with the intention of replacing the 12V lead acid battery in my 4WD. So far, what I've got is the following. 4 x 10 Ah LifePo4 batteries (38120 Headway) in ...
1
vote
0answers
433 views

LiFePO4 solar charging problems (amateur question)

My application is primarily portable ham radio operation. I chose a self-balancing, 4.5 Ah, 12.8V, 4s3p LiFePO4 battery pack, a 28W panel and an MPPT solar charge controller with extremely limited ...
1
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0answers
129 views

Switching in parallel high-capacity LiFePo4 battery packs during discharge cycle

I have two, possibly three 48V-nominal 50Ah Lithium Iron Phosphate battery packs used for E-bikes (16S cells, 2.5kWh capacity each). The packs have BMS circuitry which limits discharge to 50A (...
0
votes
0answers
20 views

Reverse polarity protection LiFePo4

I'm doing a project with esp32 devkit v4 and I'll be supplying it with external power (LiFePo4 3.2V cell). I want to do a protection in case the battery gets connected inversely. I searched about it ...
0
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0answers
17 views

Using SLA in place of LFP to test an LFP charging device

I'm testing a solar charge controller for LiFePO4 that uses absorption and float stages. By design, power-on initiates the absorption stage, and a timer terminates absorption and initiates the float ...
0
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0answers
67 views

Questions about using a step up/down voltage regulator in a solar charging application

In my portable 12V solar charging system, my MPPT charge controller and LiFePO4 battery pack don't play together well at end of charge. The battery disconnects at some low charge rate, and when this ...
0
votes
0answers
51 views

Dismantling 110v DC LiFePo4 Battery Pack

I've inherited a 110v battery pack that used to be used for a solar array made of 34 each 100 amp hour LiFePo4 3.2v for a nominal voltage of 108.8v all together. I'm getting about 90v total from the ...