4S BMS module with balance, 40A, 16.8V
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4S BMS module with balance, 40A, 16.8V

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Average rating: 5/5 Number of reviews: 12

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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.


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.


11.31 g
Data sheet
Number of cells
Lithium Ion
Load voltage
Nominal Current
rating 5
foarte bun
rating 5
Funcționează perfect
Modul BMS 4S40A cu balans
rating 5
Firma serioasa si livrare prompta. Modulul functioneaza perfect, conform descrierii. Recomand.
rating 5
Netestat inca, dar site de incredere, corect
rating 5
rating 5

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. 

recomand cu încredere
rating 5
va multumesc pentru serviciile oferite si promtitudinea cu care ati onorat întotdeauna comenzile plasate
produs ok
rating 5
produs bun la pret corect
modul bms
rating 5
Foarte multumit de produse !!!
Modul bms
rating 5
Magazin un produsele vin repede.Modul bun fara probleme de montare
rating 5
produs de calitate si livrat rapid
rating 5
A venit de pe o zi pe alta bine ambalat. A mers din prima! Am folosit doar un rand de celule puse in baterie pt AEG