| Brand: | Lws |
|---|---|
| Battery Series: | 3s, 4s Available |
| Max Charge: | 8A |
| Max Discharge: | 8A |
| Operating Temperature: | -20~+70ºC |
| Delivery Time: | 7-15 Days After Payment |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier 1. True lithum battery pack BMS factory
2. Supply OEM/ODM and custom service
3. High quality with smart balance function
4. Wholesale price
5. ISO9001/ISO14001/CE/ROHS certificates
6. Fast delivery
| Shenzhen Li-ion Battery Bodyguard Technology Co.,LTD | ||||
| PCM Specifications For 14.8V(4S) Li-ion Battery Packs | ||||
| Model: LWS-4S8A-451(4S) | ||||
| No. | Test item | Criterion | ||
| 1 | Voltage | Charging voltage | DC: 16.8V 4.2/Cell | |
| Balance voltage for single cell | ||||
| 2 | Current | Balance current for single cell | ||
| Current consumption | 50μA | |||
| Maximal continuous charging current | 8A | |||
| Maximal continuous discharging current | 8A | |||
| 3 | Over charge Protection | Over charge detection voltage for single cell | 4.25±0.025V | |
| Over charge detection delay time | 0.5S-1.5S | |||
| Over charge release voltage for single cell | 4.15±0.050V | |||
| 4 | Over discharge protection | Over discharge detection voltage for single cell | 2.70±0.080V | |
| Over discharge detection delay time | 10mS-150mS | |||
| Over discharge release voltage for single cell | 3.00±0.100V | |||
| 5 | Over current protection | Over current detection voltage | 100±15mV | |
| Over current detection current | 15±2A | |||
| Detection delay time | 0.5-1.5S | |||
| Release condition | Cut load | |||
| 6 | Short protection | Detection condition | Exterior short circuit | |
| Detection delay time | 100-300us | |||
| Release condition | Cut load | |||
| 7 | Resistance | Protection circuitry(MOSFET) | ≤50mΩ | |
| 8 | Wire breaking protection | The signal wire is fake welded or dropped off | charge/discharge off | |
| 9 | Temperature Protection ( NTC control ) |
Charge high temperature protection point | 50ºC ± 4ºC | |
| Charge high temperature recovery | 40ºC ± 4ºC | |||
| Charge low temperature protection point | -10ºC ± 4ºC | |||
| Charge low temperature recovery | 0ºC ± 4ºC | |||
| Discharge high temperature protection point | 70ºC ± 4ºC | |||
| Discharge high temperature recovery | 60ºC ± 4ºC | |||
| 10 | Temperature | Operating Temperature Range | -20~+70ºC | |
| Storage Temperature Range | -40~+125ºC | |||
Our Advantages for BMS
1. Complete Function: Detect and protect the battery from: over-charge, over-dicharge,
over-current, short-circuit,
temperature detecting protection, auotmatically voltage balance function.
2. Build with high end electronic components (High End IC and MOSFET ) ,
3. Simple structure design will let it have more stable quality working performance ,
4. Flexible application ( it can be used for less series battery by leaving some connection pins at empty status ),
5. Full set of protection measures let it works well
6. Without any infulence from external unexpected accidents.
About your products, just tell us the relative voltage/ cells/ current A or equipment etc,
we will help to recomment the most suitable products for you. or we design for you!
Q: How do I judge what material my battery is ?
A: Please take a look at the battery body. If the normal voltage of your battery shows as 3.2V, the battery will be LiFePO4.
If the normal voltage of your battery shows as 3.6V or 3.7V, the battery will be Li-ion or Li-polymer battery.
You can also ask battery manufacturer the material of battery.
Q: Can I use this protection circuit board for my battery?
A: The protection circuit board you need to buy must be same cells in series as your battery pack.
Please also tell us your battery material: LiFePO4 or Li-ion battery?
Q: Do we need cell balance or not?
A: The function of balance: Since battery is made of many pcs of cells in parallel and in series, the cells can't be
the same as no two people in the world is the same. So battery cells put in group with similar performance is not
consistent, which will lead to each cell voltage is not consistent as well after the completion of the charging if
without balance function.
Q: Do you have Minimum Order Requirement (MOQ)?
A: No, We don't have MOQ.
Different customer have different requirement.
We can provide various capacity and size is per your requirements, Also ODM / OEM is welcome.
Q: What is your term of payment?
Q: How to contact for BMS?
A: Please send messages below or e-mail us and we are always glad to help you with BMS.
Suppliers with verified business licenses
Audited Supplier 
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