Is it Time to Replace your Batteries? Here is how you can find out!
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Date: 2022-07-03
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Comments and reviews: 4
Lexi
I bought that same zke tester, and recently the cable between the power brick and the tester got extremely hot and the plug on the tester melted. The aliexpress seller refuses to respond, and since its been more than 90 days, paypal and aliexpress wont do anything about it, and the seller simply suggested i should buy a new one. Its 10 months old and has been used to test 5 batteries in its lifetime. Two 100ah 13. 2v lifepo4, and 3 individual 400ah lifepo4 cells. It failed when i attempted to test one of my new 280ah EVE lf280k cells. I have no idea whats wrong with this unit but it seems theres an internal short, only once the test begins.
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I bought that same zke tester, and recently the cable between the power brick and the tester got extremely hot and the plug on the tester melted. The aliexpress seller refuses to respond, and since its been more than 90 days, paypal and aliexpress wont do anything about it, and the seller simply suggested i should buy a new one. Its 10 months old and has been used to test 5 batteries in its lifetime. Two 100ah 13. 2v lifepo4, and 3 individual 400ah lifepo4 cells. It failed when i attempted to test one of my new 280ah EVE lf280k cells. I have no idea whats wrong with this unit but it seems theres an internal short, only once the test begins.
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qnx
I keep seeing people make this mistake, and I don't know why. I highly recommend not using an AC inverter whenever possible, not only due to some energy loss during convertion, but also because LEDs typically have terrible power factor.
There are 12V LEDs out there, mainly meant for RVs, they can run both on 12V DC and 12V AC, and in case of DC, 4 of them (rated for 3-4 W) in parallel barely drawn an amp while giving off a very good amount of light, enough to normally light a somewhat large room.
Same for laptop chargers, there are 12V chargers for laptops (meant to be used in a car, and they are efficient.
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I keep seeing people make this mistake, and I don't know why. I highly recommend not using an AC inverter whenever possible, not only due to some energy loss during convertion, but also because LEDs typically have terrible power factor.
There are 12V LEDs out there, mainly meant for RVs, they can run both on 12V DC and 12V AC, and in case of DC, 4 of them (rated for 3-4 W) in parallel barely drawn an amp while giving off a very good amount of light, enough to normally light a somewhat large room.
Same for laptop chargers, there are 12V chargers for laptops (meant to be used in a car, and they are efficient.
reply
Davide
I based my master thesis on active BMS capable on performing Electrochimical Impedance Spectroscopy (EIS. You basically inject a sinusoidal current on the cell, measure the voltage perturbation on it and get magnitude and phase of the resulting impedance at that frequency. Usually, you only characterize the capacitive region which goes from about 1Hz to 1kHz, in the transition between capacitive and inductive behaviour you get the value of the AC cell (bulk) resistance
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I based my master thesis on active BMS capable on performing Electrochimical Impedance Spectroscopy (EIS. You basically inject a sinusoidal current on the cell, measure the voltage perturbation on it and get magnitude and phase of the resulting impedance at that frequency. Usually, you only characterize the capacitive region which goes from about 1Hz to 1kHz, in the transition between capacitive and inductive behaviour you get the value of the AC cell (bulk) resistance
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orlin
What a review when to replace the batteries and the logo introduction after the your project speech is a pure cheap introduction.
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What a review when to replace the batteries and the logo introduction after the your project speech is a pure cheap introduction.
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