What Is The Role Of The Lithium Battery Protection Board?

- Dec 19, 2019-

The wiring and methods of the lithium battery protection board are introduced. As a safety protection device for lithium battery cells, the protection board must not only work reliably within the normal operating current range of the device, but also act quickly when the battery is accidentally short-circuited or over-current to protect the battery cells. Lithium battery protection board, the principle is very simple, it is also simple to make, its requirements to customers must be very clear, down to the component model, process requirements, voltage requirements, current requirements, output port connection method, charging, etc.

Wiring circuit and method of lithium battery protection board


The number of strings of each lithium battery protection board is different. The wiring method is different, and the wiring method of the same port is also different. If you want to be precise for each product, please see the detailed page of the protection board, but the overall wiring is still the same. Due to the activeness of lithium batteries, a protective plate must be added to use lithium batteries to prevent lithium batteries from overcharging, overdischarging, and overcurrent. The following describes how to connect the lithium battery protection board.


Lithium battery protection board is for the charge and discharge protection of series lithium battery packs; when fully charged, it can ensure that the voltage difference between the individual cells is less than the set value (generally 20mV), so that the individual cells of the battery pack are evenly charged Effectively improve the charging effect under series charging mode; at the same time detect the overvoltage, undervoltage, overcurrent, short circuit, and overtemperature status of each single cell in the battery pack to protect and extend the battery life; undervoltage protection enables each When a single battery is being used, avoid battery damage due to over-discharge.


Lithium-ion batteries are all batteries + protection boards. 3 wires will only appear on the protection board, the battery will always only have 2 wires. There are two types of lithium-ion batteries. Obviously 3.7V is non-aluminum iron phosphate, which can be replaced directly.


The role of lithium battery protection board


1. Overcharge protection to prevent damage to the lithium battery pack caused by overcharging.


2. Over-discharge protection to prevent battery life from being reduced due to over-discharge.


3. Over-current and short-circuit protection are safer and more reliable during the use of lithium batteries.


4. Small size, suitable for a variety of lithium battery packs.