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4S BMS module with balance, 40A, 16.8V
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4S lithium battery charging protection module (example 4x18650), BMS (Battery Management System) type for cells with a nominal voltage of 3.7V (4.2V charged).
Can be used to create tool batteries.
This BMS is provided with the cell balancing function, increasing the durability and performance of the battery used. All cells will be loaded at the same level.
Specifications:
Version: with Balance
Battery charging voltage: 16.8V
Maximum discharge current: 40A (with good heat dissipation)
Maximum charging current: 10A (check the battery specifications)
Dimensions mm: 60.5 x 45.2 x 3.4mm
Non-observance of the diagram when mounting elements and connections lead to module failure.
Data sheet
- Number of cells
- 4S
- Technology
- Lithium Ion
- Load voltage
- 16.8VDC
- sway
- Yes
- Nominal Current
Cand se incarca acumulatorii ? Nu are LED-uri care indica incarcarea,am pus 2 acumulatori mai slab incarcati si vad ca nu echilibreaza tensiunea nici dupa 3 ore
Bms-ul echilibreaza in mod pasiv prin aplicarea unei rezistente asupra acumulatorilor ce sunt peste nivelul celorlalti, in procesul de incarcare. Foloseste rezistori de 43 Ohm pentru descarcare cu o rata de circa 100mA. Acumulatorii mai incarcati se voir incarca mai incet pana ce vor ajunge la nivelul celei mai descarcate celule din circuit. Cu cat diferenta intre celule este mai mare cu atat vor fi necesare mai multe cicluri incarcare/descarcare pentru a atinge echilibrul
Conectarea celulelor neechilibrate, cu uzura diferita si/sau cu caracteristici diferite este o practica absolut eronata indiferent daca BMS-ul are sau nu functia de echilibrare.
Lipsa ledurilor este fireasca deoarece BMS-ul in sine nu incarca, doar protejeaza. Exista circuite separate ce pot fi montate pentru indicarea starii de incarcare.
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