7S 21A 29.4V lipo lithium Polymer BMS/PCM/PCB battery protection circuit board for 7 Packs 18650 Li-ion Battery Cell with Balance with Temperature switch
The BMS is used for li-ion battery with balancing function
Note: This BMS is WITH 65 degree temperature controller.
Features:
1) high-accuracy voltage detection circuit;
2) terminal of the charger using high voltage device;
3) Built-in three-stage over-current detection circuit (over-current 1, over-current 2, load short circuit);
4) MOS transistor can control the battery charge and discharge;
5) low standby current consumption.
Parameter:
over charge: 4.325V
over discharge: 2.5V
charge voltage: 4.2 V * 7 = 29.4V
continuous work current: 21A
over current: 47.6A
balance voltage: 4.2V
balance current: 45mA
![](https://ae01.alicdn.com/kf/HTB1qImLLXXXXXa_apXXq6xXFXXXJ/224459592/HTB1qImLLXXXXXa_apXXq6xXFXXXJ.jpg?size=164860&height=800&width=800&hash=4a25dab82fbabb65e5710c18fd9b46d5)
![](https://ae01.alicdn.com/kf/HTB1yuKOLXXXXXXtapXXq6xXFXXX7/224459592/HTB1yuKOLXXXXXXtapXXq6xXFXXX7.jpg?size=171194&height=934&width=793&hash=5a4af4fc7de2ef28be87b4b4cea76693)
![](https://ae01.alicdn.com/kf/HTB1uI99LXXXXXc1XpXXq6xXFXXXl/224459592/HTB1uI99LXXXXXc1XpXXq6xXFXXXl.jpg?size=107044&height=687&width=495&hash=f28915fc43f9e41ae2d00e5f636f8b89)
BMS solder instruction:
B- battery negative end
B1+ connect the point between battery 1 and battery 2
B2+ connect the point between battery 2 and battery 3
B3+ connect the point bewteen battery 3 and battery 4
B4+ connect the point between battrey 4 and battery 5
B5+ connect the point between battrey 5 and battery 6
B6+ connect the point between battrey 6 and battery 7
B7+ Charge/discharge positive end
P- Charge/discharge negative end
![](https://ae01.alicdn.com/kf/HTB1Acu0LXXXXXcGXFXXq6xXFXXXv/224459592/HTB1Acu0LXXXXXcGXFXXq6xXFXXXv.jpg?size=66298&height=414&width=750&hash=55f968f14327799f65dc6acb6472a6d7)
SIZE: 10.6CM * 6.0CM
![](https://ae01.alicdn.com/kf/HTB1b_W1LXXXXXaaXVXXq6xXFXXXD/224459592/HTB1b_W1LXXXXXaaXVXXq6xXFXXXD.jpg?size=90399&height=439&width=600&hash=311810e4712b64d90c328fb728bba4d5)
Applications:
7S Li-ion18650,LiCoO2,LiMn2O4,Li(NiCoMn)O2 rechargeable batteries
7S Lipo rechargeable batteries
Notice:
1. Please pay attention to the use condition of input and output voltage and load current , make the protective plate within the power consumption of no more than specification allows power consumption;
2. Connect the battery will happen cannot discharge status, in this case, connect the charge can be restored to normal working state;
3.If a set of batteries with over-discharge and over-charge cells, the bms cannot be charge and discharge.
![](https://ae01.alicdn.com/kf/HTB1xcaPLXXXXXagXXXXq6xXFXXXJ/224459592/HTB1xcaPLXXXXXagXXXXq6xXFXXXJ.jpg?size=70130&height=375&width=500&hash=2a614d875d4b1cf945cab159d4049fad)