Description
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About your products,just tell us the relative voltage/ cells/ current A or equipment etc, Product Advantages:
About the battery BMS/PCB/PCM Function: Detect and protect the battery from over-charge ,over-dicharge, over-current short-circuit ,temperature detecting protection and auotmatically voltage balance function . Build with high end electronic components (High End IC and MOSFET ) ,simple structure design will let it have more stable quality working performance , Flexible application |
- Description of application effect
sightseeing vehicle,electric tricycle,low speed ev,emergrncy ups,solar street light,RV&home energy storage.soon on
About your products,just tell us the relative voltage/cells/current A or equipment etc,we will help to recommend the most suitable products for you. |
LiFePO4 Battery/Li-ion battery circuit board BMS/PCM/PCB Board
| Mode | LWS-4S7A-030V1 (4S) |
| PCM Size | L50*W20*T5 mm |
| battery series | 4S Available |
| working current | 7A Available |
| Application | LED lights, Emergency lights, Digital Equipment, etc |
| Sample | available |
1. First connect the B- of the BMS to the total negative pole of the battery pack;
2.The cable starts from the thin black one connecting B-, the second red wire connects the positive pole of the first string of batteries, and the next string is connected in turn to positive pole of the battery,B-,B1,B2……B4; then insert the cable into the BMS;
(The maximum number of strings is 4 strings, the example picture is 4 strings) (Please weld the wires in order and avoid pseudo solder joints.)3. Connect Charger C-/Load P- with BMS C-/P- (Use larger size wires)
4. Connect Positive Pole: Charger C+/Load P+ with Battery Pack B+ (Use larger size wires) .
| PCM Specifications For 12.8V(4S)LiFePO4 Battery Packs | |||
| Model:LWS-4S7A-030(4S) | |||
| No. | Test item | Criterion | |
| 1 | Voltage | Charging voltage | DC:14.4V 3.6/Cell |
| Balance voltage for single cell | 3.60±0.025V | ||
| 2 | Current | Balance current for single cell | 36±5mA |
| Current consumption | ≤50μA | ||
| Max continuous charging current | 7A | ||
| Max continuous Discharging current | 7A | ||
| 3 | Over charge Protection | Over charge detection voltage for single cell | 3.90±0.025V |
| Over charge detection delay time | 0.5S-1.5S | ||
| Over charge release voltage for single cell | 3.80±0.05V | ||
| 4 | Over discharge protection | Over discharge detection voltage for single cell | 2.3±0.08V |
| Over discharge detection delay time | 0.5S-1.5S | ||
| Over discharge release voltage for single cell | 2.7±0.10V | ||
| 5 | Over current protection | Over current detection voltage | 0.30±0.025V |
| Over current detection current | 16±3A | ||
| Detection delay time | 5mS-50mS | ||
| Release condition | Cut load,Auto-Recovery | ||
| 6 | Short protection | Detection condition | Exterior short circuit |
| Detection delay time | 200-500us | ||
| Release condition | Cut load,Auto-Recovery | ||
| 7 | Resistance | Protection circuitry(MOSFET) | ≤50mΩ |
| 8 | Temperature | Operating Temperature Range | -40~+85ºC |
| Storage Temperature Range | -40~+125ºC | ||
| FAQ
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: Can use this protection circuit board, or not? There are 2 questions: How much cells in series is your batterypack? The protection circuit board you need to buy must be same cells in series as your battery pack. What material is your battery? Only the LiFePo4 battery has different electric parameter from other battery, so if you need buy the protection circuit board for LiFePo4 battery , Please let us know firstly. 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? A: PayPal, T/T, L/C,Western Union 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. |