4S Battery Protection Circuits

4S Battery Protection Circuits
 Hello; We would compile for you the uses of 4S BMS Battery protection circuits and all the information you should pay attention to when using them. We wish you pleasant reading.

What is Battery Management System or BMS?

 

Battery Management System – Battery Management System (BMS) is the battery's safety system and is responsible for keeping battery conditions (such as voltage, current & temperature) within safe limits.

 

The level of protection depends on both the requirements of the battery chemistry and the complexity of the BMS itself. Batteries with primitive chemistries such as lead acid and nickel cadmium are resistant to overcurrent and overvoltage situations due to their high internal resistance and high self-discharge levels. Most of the time there is no need for protection other than a fuse.

 

However, while closed-type Lead Acid (SLA) Batteries, Valve Regulated Lead Acid (VRLA) Batteries and Nickel Metal Hydride (Ni-MH) batteries provide higher efficiency, they are more vulnerable to overvoltage, undervoltage, overcurrent and extreme temperature conditions. It is therefore important to monitor these batteries for specified conditions during operation.

 

 

Battery Management System in Lithium Ion Batteries

 

Lithium-based batteries are much more sensitive to operating conditions than all other batteries. Although the other batteries described may be damaged, they can often overcome short-term disturbances and regulate themselves. On the other hand, lithium batteries are very intolerant in terms of voltage & temperature limits. For example, even if the maximum charging voltage of an SLA, VRLA, or Ni-MH cell is exceeded by 100 millivolts, the cell will self-discharge, release some heat, and possibly continue operating with a small loss of capacity. If the same amount of overcharging is attempted in a lithium cell, the cell will undergo a destructive reaction, heating up and eventually breaking down.

 

 

The Battery Management System is generally responsible for MAINTAINING the safe conditions of the battery. Since each battery type has different limits and tolerances, battery management systems must comply with the same limits and tolerances.

 

 

Battery Protectors

 

The simplest form of BMS, also known as a "Battery Saver", takes the battery's cell voltages and battery current and compares them to predefined limits. Any exceedance results in battery disconnection. This function is usually provided by simple analog comparator integrated circuits. Disconnection is It can be easily achieved using a MOSFET group.

 

Battery Protectors are used in widespread application areas, from small household appliances and hand tools to small vehicles such as electric bicycles and electric scooters. The main function of this type of Battery Savers is to provide the basic conditions for battery protection, but they cannot provide the most critical features listed below.

 

Balancing cells to the same charge level

Calculating the battery's state of charge (SOC) and state of health (SOH)

 

Presenting battery information through a communication interface

 

 

4S 4A BMS Lithium Battery Protection Circuit

 

 

 

Features

 

charging voltage range: 4.25 - 4.35v ± 05v

over discharge voltage range: 2.3 - 3.0v ± 0.05v

operating temperature: -40 - +50 c

storage conditions: -40 - +80 c

maximum operating current: 4 - 5A

maximum instantaneous current: 6 - 7A

quiescent Current: less than 6uA

Effective life: more than 50,000 hours

Short circuit protection: need to be charged, protect recovery

Suitable for: 4 packs 18650 lithium battery 14.8V 16.8V

 

Main functions and features: charging protection, over-discharge protection

 

 

Wiring Diagram

 

 

 

 

Warning:

 

 1-) Connection with lithium battery protection board according to the connection diagram,

voltage between battery voltage overcharge and overdischarge voltage,

and P+, P-1 Second charge, P+ and P- output voltage battery voltage.

 

 2-) Battery charging function: plus charge between P+ and P- to charge the battery,

battery voltage charge overcharge detection voltage (4.25±025V),

Protection circuit to cut off the charging path, to achieve overcharge protection.

 

3-) Battery over-discharge protection: between P+ and P- the connected load discharges to the battery

over discharge voltage battery voltage drops (2.7?0.05V), protection circuit,

The discharge path is shut off to achieve over-discharge protection.

 

4-) short circuit protection: When P+ and P- short circuit protection circuit will act 5-50uS quickly, cut off access, short circuit protection.

 

5-) overcurrent protection function: When V-terminal voltage (0.15±0.02V), the protection circuit will act quickly within 6.7-13.9ms, cut off access, overcurrent protection.

 

 You can click on the link to buy the product.

https://www.elektronikport.com/urun/4s-4a-16v-bms-koruma-karti-lityum-batarya-18650-li-ion-lipo-protection-module

 

 

4S 10A BMS Lithium Battery Protection Circuit

 

 

Features

 

Overcharge detection voltage: 4.25 ± 0.025V

Overcharge release voltage: 4.15±0.05V

Over-discharge detection voltage: 2.50 ± 0.08V

Over-discharge termination voltage: 3 ± 0.1V

Current: 20-30A

study

12.06.2024