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Our 10 years of Lithium Iron Phosphate experience shared within thousands of articles, hundrends of tests and examples.

16.Feb 2018
 
Charging individual cells using the regulated (laboratory) power supply

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Charging individual cells using the regulated (laboratory) power supply Many of the laboratory power supplies allow charging of the individual cells. Using such a regulated power supply is a suitable method for performing the initial charging or for the balancing of a single cell in a battery pack (by means of charging to a fixed voltage level). There are usually 3 steps to follow: 1) set the target voltage (open voltage) – without the connection of the battery (3.65 at the picture), 2) start charging and set the current to be used (3.0 A at the picture), 3) when the charger reaches the target voltage – it usually starts to reduce the charging current until a low value. (3.66 V reached at 0.04A). It is a time to stop charging and disconnecting the charger.

16.Feb 2018
 
Initial charging FAQ

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Check these FAQ published on our blog to understand the initial battery charging We remind all users of the LFP cells and LP batteries that the cells and batteries MUST be charged to full voltage level BEFORE assembling into a pack and before starting to be used. The new 3.2V LFP cells delivered from the warehouse are partially charged. However before the first use, it is essential to charge each cell to full capacity.
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16.Feb 2018
 
Maximal voltage during Initial charge of LiFePO4

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I want to make the initial charge of all the LiFePO4 cells to the same maximal voltage level of 4.0V. How can I do that? EDIT: This article gives the example of 4.00V charge level. The same information is to applied for charging to other voltage levels: e.g. 3.65V, 3.70V, 3.80V, 3.90V. Different voltage levels may be applied for initial charging based on the manufacturer specification. ANSWER: The best way it to find a power supply or a charger that will charge to the 4.0V directly. Another solution is to charge using the laboratory power supply or the regulated power supply that allows to set the final (maximal) voltage limit. We suggest to check with the local electronic components suppliers for these products.
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16.Feb 2018
 
Initial charge voltage levels of LiFePO4

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Initial charge voltage levels Question: I wish to equip my workshop with the proper tools. Can you offer me following chargers: one model with cut off voltage at 3.65V, one model with cut off voltage at 3.80V and one model with cut off voltage at 4.00V? Answer: There is no need to have so many different chargers. The typical chargers that are . Please see some additional comments.
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09.Feb 2018
 
Sudden battery discharge

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FAQ: “Sudden” battery discharge I have bought a several of LFP cells and made the pack with them to replace the lead-acid battery in my houseboat. The LFP battery was working great and it gives much more capacity than the lead acid. However after several weeks of usage, I came back after the weekend and I found out that the battery is completely discharged. Why this happen? Please note that unlike the lead acid batteries, the LFP batteries will be completely damaged if you discharge them bellow the minimal voltage (usually >2.5V per cell, or bellow 10V for 12V battery). This may happen if you have some equipment that takes the power from the battery continually. Maybe you simply forget some light or some equipment „on“, and after few days the battery is deeply discharged and damaged forever.
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09.Feb 2018
 
LFP as starting battery

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LFP as a starting battery – two concerns Question: I want to use the LFP battery (4x 3.2V cells) for starting of my car. What SBM should I use to protect the battery? You cannot use a SBM to protect the starting battery. For starting the car, the current will be very high, hundreds or even nearly 1000 Amps, it is not possible to disconnect such high currents. WARNING: Additionally it is not possible to disconnect the battery from vehicle circuits. The car electronics may burn or become faulty of the battery is suddenly removed from the circuit, as a result of disconnection, during the operation (when the engine is running).
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09.Feb 2018
 
History of LiFePO4 Winston technology

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Difference between Winston Battery and other brands (1) What is the primary difference between the Winston Battery LiFePO4 products and other brands that also offer prismatic cells? 1. Technology history Thundersky Winston Battery The Thunder Sky Winston Battery company was the originator of the large capacity technology for the prismatic cells. The technology was created by Mr. Winston Chung. By means of partnerships with several companies TS-WB transferred the production facilities to partner factories. However the core know-how and technology processes were retained by Mr. Winston Chung.
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09.Feb 2018
 
Operating temperature of LFP Cells

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The temperature of the LFP cells What is the operating temperature of the LFP cells? The operating temperature of the LFP cells is based on the specification and the application. There are several points to be clarified in this matter. The first to clarify is the three different temperatures in relation to the batteries. The ambient temperature The ambient temperature is usually given as the air temperature of any environment where the batteries and related equipment are kept. The ambient temperature is given at the specification of the cells. It is also called the operation temperature.
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09.Feb 2018
 
Winston shipment in February

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The shipment of Winston Battery cells The shipments of the Winston Battery cells are on the way, arriving in end of February and early March. Get ready for your orders. for more inquiries.
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09.Feb 2018
 
ThunderSky Winston new Factory

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Winston Battery New Factory – Winston Battery (Changtai) Limited All cells delivered since mid 2017 have been made in the new factory. The factory provides enough space to accommodate the growing demands for the LFP prismatic cells.
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