2 Strings 7.4V 8.4V 18650 Lithium battery protection board band balancing 20A current

Product introduction

The reason why lithium batteries (charging type) need to be protected is that it is determined by its own characteristics. Because the material of the lithium battery itself determines that it cannot be charged, over -current, overcurrent, short -circuit and ultra -high temperature charging. ThereforeIt will always follow a protective board to monitor the status of the battery. The battery is charged to about 4.2V to stop charging. The battery voltage is lower than 2.75V.Current, prevent damage to batteries, can greatly improve the service life of lithium batteries, · balance charging, referred to as uniform charging, is the charging of balanced battery characteristics. It refers toThe battery end voltage is unbalanced. In order to avoid the deterioration of this imbalance, the charging voltage of the battery pack needs to be increased, and the battery is activated and charged to achieve the maintenance method of the battery characteristics in the battery pack and extend the life of the battery life.

Product parameters

Product name: 2 string 7.4-8.4v20a battery protection board

Product model: HW-392

Charging voltage: DC84-9V

Continuous discharge current: 20A (if the heat dissipation environment is not good, please reduce the use of load current)

Continuous charging current: Maximum 10A Product Size: 48*18*3.5mm (Standard Edition) Applicable selection: suitable for nominal voltage 3.7V, battery filled with 4.2V (including 18650, 266650, polymer battery), which can be activated with startupThe current is 25A, the power drill below 50W, or the 168W blocking load.

Precautions

It takes 2 10C-20CD power batteries, or 4 5C-10C power batteries (Recommended power battery models: SonyVTC4AVTC5, VTC6) 0V and 8.4V connection cables (recommended power battery models: Recommended power battery model:Trip).

When the first welded battery, you need to charge it to output. Strictly follow the figure 0V, 4.2V, 8.4V. You cannot touch any components on the board when welding. Do not deliberately short circuit.

When the first welded battery or is charging, as long as a single battery exceeds 4.2V, the "430" resistance will heat up (discharge to about 4.19V to stop the fever) If the "430" resistance is severely heated (the heat is so hot), dare not touch the hand), and the "430" resistancePlease check whether the wrong line is connected