Daly BMS gone crazy..Update Opinions
I was charging my 120ah lifepo4 battery yesterday and came in for lunch and saw it shut down..I figured it hit the 3.65 volt cell limit and shut down,I went out to check it and saw this on the Blueto...
Forum Discussion
I would not call BFL13's test a short large load.
https://www.freepatentsonline.com/4143216.html
Abstract:
A unique storage cell is provided in which the active mass on the positive electrode is a mixture of crystalline and an effective amount of polycrystalline lead superoxide (PbO2). These cells are characterized, inter alia, by their remarkably lower internal resistance, higher activity, better charging and discharging characteristics, lower sulphatization, higher storage capacity and greater ability to draw larger amounts of electric current in a considerably shorter period of time as compared with conventional lead-acid storage cells. Storage devices (e.g., a battery) made from such cells also exhibit superior performance characteristics as compared with storage devices made from the conventional lead-acid cells. Batteries made from such cells will be referred to as "lead-crystal" batteries.
Also, several methods are described for making the polycrystalline and crystalline lead superoxide (active mass).
From the body of the patent:
"The lead superoxide crystalline and polycrystalline active mass is a dark brown to black material. It is hard, homogenous, highly porous and has remarkably low internal resistance."
and
"Also, the lead-crystal batteries which are made in accordance with this invention exhibit little or no sulphatization. This means that, as a practical matter, these batteries can discharge to a point approaching zero emf. In contrast, sulphatization is a rather common phenomenon in the lead-acid batteries, and, consequently, the lead-acid batteries cannot discharge beyond about 1.5 to 1.8 volts emf, or almost irreversible sulphatization will take place in the lead grids which hold the paste of the active mass."
https://www.freepatentsonline.com/4143216.html
Abstract:
A unique storage cell is provided in which the active mass on the positive electrode is a mixture of crystalline and an effective amount of polycrystalline lead superoxide (PbO2). These cells are characterized, inter alia, by their remarkably lower internal resistance, higher activity, better charging and discharging characteristics, lower sulphatization, higher storage capacity and greater ability to draw larger amounts of electric current in a considerably shorter period of time as compared with conventional lead-acid storage cells. Storage devices (e.g., a battery) made from such cells also exhibit superior performance characteristics as compared with storage devices made from the conventional lead-acid cells. Batteries made from such cells will be referred to as "lead-crystal" batteries.
Also, several methods are described for making the polycrystalline and crystalline lead superoxide (active mass).
From the body of the patent:
"The lead superoxide crystalline and polycrystalline active mass is a dark brown to black material. It is hard, homogenous, highly porous and has remarkably low internal resistance."
and
"Also, the lead-crystal batteries which are made in accordance with this invention exhibit little or no sulphatization. This means that, as a practical matter, these batteries can discharge to a point approaching zero emf. In contrast, sulphatization is a rather common phenomenon in the lead-acid batteries, and, consequently, the lead-acid batteries cannot discharge beyond about 1.5 to 1.8 volts emf, or almost irreversible sulphatization will take place in the lead grids which hold the paste of the active mass."
