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Smart BMS System
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| Place of Origin | China |
| Brand Name | XUWEN |
| Certification | CE,FCC,MSDS,ROHS,UN38.3 |
| Model Number | RS485 Smart BMS Battery |
RS485 Smart BMS System Battery 20S 72V 10A 50A 80A 100A 200A Smart BMS Battery
Smart BMS Battery Description:
Battery protection board, as the name suggests, lithium battery protection board is mainly an integrated circuit board that protects rechargeable batteries (usually lithium batteries). The reason why lithium batteries (rechargeable) need protection is determined by their own characteristics. Because the material of the lithium battery itself determines that it cannot be overcharged, overdischarged, overcurrent, short-circuited, or ultra-high temperature charge and discharge. The three basic functions of the lithium battery protection board are short circuit protection, overcharge protection and overdischarge protection.
Smart BMS Battery Parameter:
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Content | Specification | Unit |
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Discharge
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Continuous Discharge current | 80 | A |
| Pluse Discharge Current | 240±20 | A | |
| Charge | Charge cut-off voltage | 54.6 | V |
| Max charge current | 30(MAX) | A | |
| Over Charge protection | Overcharge detection voltage | 4.25±0.05 |
V
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| Overcharge detection delay time | 600±300 | MS | |
| Overcharge release voltage | 4.15±0.05 | V | |
| Balance Portection | Balance Detection voltage | 4.18 | V |
| Balance release detection voltage | 4.18 | V | |
| Balance current | 35±5 | mA | |
| Overdischarge Portection | Overdischarge detection voltage | 2.7±0.05 |
V
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| Overdischarge detection delay time | 600±300 | MS | |
| Overdischarge release voltage | 3.0±0.05 | V | |
| Overcurrent Portection | Overcurrent detection voltage | 100 | mV |
| Overcurrent protection current | 135±20 | A | |
| Overcurrent detection delay time | 600±300 | MS | |
| Release condition | Cut short load | ||
| Short Protection | Detection condition | Out load short cycles | |
| Detection delay time | 300±100 | uS | |
| Release condition | Cut load |
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| Temp. protection | Over Charge protection temp. | -20~50 | ℃ |
| Over Disharge protection temp. | -20~70 | ||
| Interior resistance | Main loop electrify resistance | ≤10 | mΩ |
| Current consumption | Current consume in normal operation | ≤100 | uA |
| Sleep current(over discharge) | ≤20 | uA | |
| Working Temp. | Temp.range | -20/80 |
℃
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RFQ
1.What is the common port and separate port? what is the difference?
We take 13S 48V 15A 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 15A. 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 15A, 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, LifePo4 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, LifePo4 3.6V)are only in charging status, no discharging, when the fast cell voltage is reached to alarm voltage (Li-ion 4.25V, LifePo4 3.75V) 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 well
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.
5. What current BMS should I choose ?
Take 10S 36V as an example: what current BMS you choose is relied on your E-bicycle Motor power and current limitation of controller. eg., choose 15A for below 350W, 20A for below 500W, 30A for below 800W, 60A for Below 1000W, higher than 1200W are contact with our service specialist for suggestions, one in all, continue current shall be higher than current limitation in Controller.
6. Whether my BMS damaged?
if you want to judge if the BMS is damaged, please take the following steps, to test if each cell voltage is the same with
voltmeter? if the cell voltage difference is over 1.0V, the fault is displayed that it cannot run far, no power supply at the
start range, short charge time, all these issues are almost caused by battery cells, if BMS damaged is displayed as no charge, no discharge, no discharge while the battery has voltage.
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