2S2P 7.4V 18650 Battery Holder Storage Box
Case 4 Slot Charging with Li-Ion PCM Protection Circuit Board DIY Power Container
Description:
This is a 18650 battery box with a protection circuit, Type 2S2P, Every 2pcs batteries are connected in parallel, and then connected in series for protection, and the combined output voltage is 7.4V. With this battery case, you can easily and quickly DIY the battery pack. After assembling the battery pack, double the capacity, double the voltage! This product has excellent technology and quality, and is the ideal choice for DIY battery pack and refitted equipment power supply.
Notice:
1> Wrong polarity placement may cause dangerous accident in charging and discharging!!!
2> All batteries that make up the battery pack must keep the same characteristics (including brand, model, capacity, internal resistance, remaining power, etc.), This product will enter the protection state after each installation combination or disassembly and reassembly, resulting in no output! Don't worry, the protection can be released by charging.
Parameters:
Name: 2S2P 18650 Battery Holder (Battery not included)
Type: 18650-2S2P-7.4V
Standard Voltage: 7.4V
Max Charging Current: 4A
Max Continuous Discharge Current: 4A
Overcharge Protection Voltage: 4.25V±0.025V (Single cell)
Over-discharge Protection Voltage: 2.40V±0.08V (Single cell)
Overcurrent Protection: 10A±2A
Overall Size: 84x80x18.6mm
Weight: about 70g
Tips:
Because it is a battery case with every 2pcs batteries are connected in parallel, and then connected in series, the protection circuit is one, so in the process of removing and installing the battery will cause voltage instability, the instantaneous voltage is not 7.4V, in this case will cause a protection, Once protected, there is no voltage output, At this point, only need to lift the protection status can be restored to normal.
How to remove the protection status?
The principle of lifting protection is to add a greater than or equal to the battery pack voltage at the output end of the battery pack to make the protection board exit the protection state.
After the battery is inserted, it causes protection without output. Solution:
Method 1: Use a 8.4V lithium battery charger, the red line is connected to the positive terminal of the charger, the black line is connected to the negative terminal of the charger, charge the battery pack to lifting protection. Generally, the protection can be released in 1-3 seconds.
Method 2:Instantaneous short-circuit between the output negative electrode (black wire) and the negative electrode of the battery pack can release the protection state. Take 2S2P as an example: use the black wire (P-) to momentarily contact the solder joint of B- (battery #3-4 negative pole), and the protection state can be released. (Note: this operation will produce a slight spark, it is normal)
Other causes of protection and removal methods:
1, Over charge protection: remove the charger;
2, Over discharge protection: connect lithium battery charger, charge to each battery 3.3V above;
3, Over-current protection: remove the load that caused overcurrent;
4, Short circuit protection: remove the cause of the short circuit.
Packing List:
1pcs x 2S2P 18650 7.4V Battery Holder Case(Battery not included)