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8 S |
Product parameter list |
LiFePO4 |
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Product Parameter list |
Detail |
Specification |
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15A |
20A |
30A |
40A |
50A |
60A |
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Discharge |
Discharging Current |
15A |
20A |
30A |
40A |
50A |
60A |
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Over Current Protection Current |
50±10A |
60±10A |
100±20A |
120±20 |
150±30A |
180±30A |
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Internal resistance |
Main circuit on resistance |
≤20 mΩ |
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Charge |
Charging Voltage |
29.2V |
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Charging Current |
8A |
10A |
15A |
20A |
25A |
30A |
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Over charge protection |
Over Charge Detection Voltage |
3.75±0.05V |
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Over Charge Detection Delay Time |
1S |
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Over Charger Release Voltage |
3.55±0.05V |
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Cell balancing |
Cell balancing Detection Voltage |
3.5V |
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Cell balancing Release Voltage |
3.5V |
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Cell balancing Current |
30±5mA |
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Over discharge protection |
Over Discharge Detection Voltage |
2.2±0.1V |
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Over Discharge Detection Delay Time |
1S |
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Over Discharger Release Voltage |
2.7±0.1V |
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Over Current Protection |
Over Current Detection Delay Time |
1MS |
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Over Current Protection Condition |
Disconnect the load |
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Short Protection |
Detection Condition |
Exterior Short Curcuit |
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Detection Delay Time |
250uS |
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Release Condition |
Disconnect the load |
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Temperature Protection |
Temperature Protection |
/ |
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Self-consumption |
Working current |
100uA |
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Sleep current (battery overdischarge) |
0 |
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Operating temperature |
Temperature range |
-20~70℃ |
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Storage temperature |
Temperature range |
-40~80℃ |
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1. Overview
7S 24V 80A 100A 120A 150A 200A 250A bms is used for 7 series 29.4V battery pack.
We can design it for various lithium batteries like LiFepo4, LiMn2O4, and Li-polymer etc.
The main functions are: over charge protection, over discharge protection, over current protection, short-circuit protection, temperature protection etc.
According to the customer request we can develop PCM in different sizes and structures.
BMS manufactured by high quality Mos and IC imported . Keep your battery long cycle service life time.
2. Advantage
Use top quality (A-level) protective integrated circuit IC, from the solution of Japan.
Strong load ability, constant discharge current 80A/100A/120A/150A , use high voltage resistance, low inner
resistance power Mosfet. The heat sink will greatly help cooling.
IC itself has power balancing function. The circuit is simple and reliable.
Typical voltage detection for each cell. So each battery will be prevented over charged or over discharged. Over current and short circuit protection
function is very reliable.Long time short circuit of the load won’t affect the PCB and the battery.Temperature protection during charging and discharging.
Extreme low power consumption. The consumption of the whole device is less than 50uA.
PCB use high anti-corrosion, high water resistance, high impedance ESD conformal Coating
1.What is the common port and separate port? what is the difference?
We take 13S48V15A BMS as an example, common port 15A means your charge cathode and discharge cathode are connected in the same point end(our P-), charge cathode and discharge cathode are used in the common connection
port, so the charge current and discharge current are the same 16A. while the separate port is separately connected by charge cathode (C-) and discharge cathode (P-), so the charge current and discharge current are different, discharge current 16A, charge current 8A.
2.What is the balance function?
The working principle and function are as followings, when your one cell voltage is up to alarm voltage(Li-ion up to 4.18V, Life Po4 up to (3.6V), then the cell Balance starts to work, balance resistance starts discharge with 35ma(when balance discharge starts to work, BMS will starts a little heat up, which is the normal reflection), the cell is in both charging and discharging status, and others which are not reached to alarm voltage(Li-ion 4.18V, Life Po43.6V)are only in charging status, no discharging, when the fast cell voltage is reached to alarm voltage(Li-ion 4.25V, Life Po43.75V)BMS starts off power protection, all the other cells are all in stop of charging, this process will enable your battery charging in balance current, and your battery voltage are in balance status, but when your cell voltage difference are in a big range, then balance can not be functioning.
3.The relationship between Battery capacity and BMS current?
There is no direct relationship between Battery capacity and BMS current, big capacity doesn’t mean a big battery, but rely on continue current, that is to say if your engine is powerful, your should choose high current of BMS, it is not relied on battery capacity.
4. What type of charger should I choose?
Lithium battery must choose specific charger, do not use Charger for Lead acid battery, for lead acid charger may have MOS with high pressure breakdown protection, which will not protect of BMS over charge.Life Po4 battery charger voltage=battery string No.X3.6V, while Li-ion battery charger voltage=Battery string No.X4.2V.
Features: waterproof, sameport, with balance.
Package Include: 1 x 8 S LiFePO4 BMS with flat cable
