Lead acid battery balancing management system

1. Working principle

The BES1200 battery balancing management system is a balancing compensation system based on power electronics high-frequency conversion technology, which can perfectly solve the imbalance problem in the use of group batteries.

During the charging and discharging of lead-acid battery packs, individual batteries may experience varying degrees of overcharging and overdischarging. Overdischarged batteries form crystalline lead sulfate on the lead plate, which adsorbs onto the lead plate and cannot participate in the reduction reaction, resulting in a decrease in the effective area and active substances of the plate, and further reducing the capacity. Further intensify this process when discharging again. Repeat this cycle until it becomes an outdated battery.

The BES1200 battery balancing management system is based on this principle, which monitors the status of each battery in real-time online to ensure the balanced operation of each battery in the battery pack and effectively prevent overcharging and overdischarging of individual batteries.

The difference in online battery capacity will be reflected in the battery voltage. During operation, the balancing module will monitor the individual terminal voltage in real time and upload it to the upper computer. When a certain individual battery is "overcharged", the system will timely activate the corresponding balancing module through a specific algorithm to balance the energy of the overloaded battery. Similarly, when a certain individual battery is "overdischarged", the battery pack will supplement energy to the individual through the balancing module connected to it, so that all individual energies of the battery pack are at the same level, effectively preventing the occurrence of outdated batteries and the deterioration trend of existing outdated batteries.

2. Technical features

The balanced part adopts a modular structure, which is convenient for operation and expansion;

■ The networking method is flexible, and it can be networked with existing monitoring platforms such as dynamic environment and BAS, or it can be networked independently wirelessly;

Floating charging with small current balance, both charging and discharging processes are bidirectional high current active balance (patented technology), with better balance effect;

Adaptive artificial intelligence algorithm, with strong targeting of energy transfer targets, accurate trend prediction, and high overall effectiveness;

Equipped with battery status detection, abnormal protection functions such as undervoltage, overcurrent, overload, etc. (patented technology), higher safety.

3. System advantages

The unique balance control strategy of bidirectional high current balance for equal charge/discharge and low current balance activation for floating charge, with adaptive artificial intelligence algorithm, makes the balance effect more significant;

Equipped with battery voltage and other status detection, as well as abnormal protection functions, without the need for additional battery detection and protection devices, the system cost is lower;

The system adopts a modular structure, which can effectively reduce maintenance costs and shorten maintenance time;

Flexible networking methods.

4. System functions

Online balancing: automatically balancing the energy of each battery during charging and discharging, extending the service life and discharge time of the battery pack;

Online detection: Battery capacity and outdated batteries are automatically detected online without manual intervention, and the results are automatically uploaded;

Online activation: restore outdated battery capacity and extend battery life;

After the mains power fails, the battery pack's endurance is automatically estimated and the data is uploaded for easy operation and maintenance;

Flexible networking methods enable remote supervision, making management intelligent and real-time.

5. Functional Block Diagram

6. Technical parameters

7. External dimensions

8. Case Study 1

1. Basic parameters	Test location/time		Weihai Kerry Electric Co., Ltd./2017.02.13-2017.02.15
	battery parameters		Sail 6-GFM-65 (12V65Ah, 39 pieces+2 discarded batteries), a total of 41 pieces per set
	load current		17.5A
2. Comparison of discharge duration
	Discharge test duration	126 minutes
	Discharge equilibrium duration	144 minutes
	Comparison results	Extend discharge for 18 minutes
3. Comparison of voltage of a single battery after discharging to the same time
	Backward monomer	Charging test (V)	Charging balance (V)	target value
	12#	0.9V	12.1	12
	16#	7.9V	12	12
4. Comparison of voltage of a single battery after charging to the same time
	Backward monomer	Charging test (V)	Charging balance (V)	target value
	12#	9.1V	12..8	13
	16#	12.2V	12.9	13
5. Data analysis	*The battery pack consists of 41 cells, with two cells lagging behind, of which 12 is severely lagging behind and 16 is moderately lagging behind. *Adding a balancing device can significantly improve the discharge time by increasing it to 144 minutes. Without balancing, the discharge time is 126 minutes, which extends the discharge time by 18 minutes; When discharging, the voltage of batteries 12 and 16 is very low, which affects the discharge of other batteries. Over time, it will affect the lifespan of other batteries. When a balancing device is added, the voltage of these two lagging batteries is replenished to the same level as the balancing target value. Therefore, these two severely lagging batteries will not affect the discharge of other batteries, effectively preventing a vicious cycle and preventing further aging; When charging, the balancing effect will not overcharge the 12th and 16th batteries, effectively preventing a vicious cycle and preventing further aging.

9. Case Study 2

1. Basic parameters	Test location/time		Weihai Kerry Electric Co., Ltd. March 15, 2019 to March 17, 2019
	battery parameters		Sail 6-GFM-65 (12V65Ah, 39 pieces+3 discarded batteries), a total of 41 pieces per set
	load current		12A
2. Comparison of discharge duration
	Discharge test duration	36 minutes
	Discharge equilibrium duration	115 minutes
	Comparison results	Extend discharge for 79 minutes
3. Comparison of voltage of a single battery after discharging to the same time
	Backward monomer	Charging test (V)	Charging balance (V)	target value
	6#	8.9V	12.97V	13
	9#	10.06V	13.31V	13
	18#	9.89V	13.36V	13
4. Comparison of voltage of a single battery after charging to the same time
	Backward monomer	Charging test (V)	Charging balance (V)	target value
	6#	14.09	13.1	13
	9#	13.76V	13.11	13
	18#	13.79V	13.16	13
5. Data analysis	*The battery pack consists of 41 cells, of which three cells are lagging behind. Among them, cell 6 is severely lagging behind, cell 18 is moderately lagging behind, and cell 9 is slightly lagging behind. *Adding a balancing device can significantly improve the discharge time, increasing it to 115 minutes. Without balancing, the discharge time can be extended by 36 minutes, prolonging it by 79 minutes; When discharging, the voltage of batteries 6, 9, and 18 is very low, which affects the discharge of other batteries. Over time, it will affect the lifespan of other batteries. When a balancing device is added, the voltage of these three lagging batteries is replenished to the same level as the balancing target value. Therefore, these three severely lagging batteries will not affect the discharge of other batteries, effectively preventing a vicious cycle and preventing further aging; When charging, the balancing effect will not overcharge batteries 6, 9, and 18, effectively preventing a vicious cycle and preventing further aging.

10. Industry Applications

Communication industry:

UPS power supply is an important tool for providing uninterrupted power supply, containing a large number of lead-acid batteries. Widely used in important occasions such as spacecraft, radar, communication stations, data centers, laboratories, bank servers, communication servers, etc. Once the battery loses power, it will cause significant and persistent adverse effects such as power outage and data loss.

The BES1200 lead-acid battery balancing management system can safely and effectively manage batteries, ensuring their safety performance and service life, ensuring stable and continuous operation of UPS power supply, and guaranteeing smooth communication.

rail transit:

EPS and UPS power supplies are widely used in subway, high-speed rail and other rail transit stations, control centers and vehicle depots to ensure the normal operation of electrical equipment and the safe and efficient operation of trains. Therefore, there are extremely high requirements for the power supply capacity and service life of lead-acid batteries.

The BES1200 lead-acid battery balancing management system can effectively extend the service life of the battery pack, prolong the discharge time, prevent fires, significantly reduce the cost of replacing the battery pack, and reduce resource waste and environmental pollution.

Data center, network server	communication base station
solar power generation	substation
high-speed rail	subway