24V Battery Active Balancer and equalizer of 7S li ion Battery with 5A Balance Current

Application :This is The Active Balancer and equalizer for 8S 24V  Lifepo4 Battery BMS With 5A Balance current . client can select suitable parameters for your Battery . 

• Why does the Lithium Battery needs Balance ?

To talk about balance, we have to start with the battery. Even batteries produced in same batches by the same manufacturer have their own life cycles – the capacity of each battery can not be exactly the same. There are two main reasons for this inconsistency:

A. As for most of the BMS with balance function , it balance function normally are passive Balance with small balance current ,

and it is impossible for the BMS to keep the consistency of all cells specially for large and high power battery . so it will be necessary to equip a active balancer to keep all cells in excellent conditions all the time .

B.Inconsistency in production
The inconsistencies in production are easy to understand. For example, during the production process, the separators are inconsistent, and the cathode and anode materials are inconsistent, which resulting in inconsistencies of overall battery capacity. For example, the production standard with a batch batteries with 2.5AH , But after the production it may become 2.4 AH,also it may be 2.6AH.

This board operates on the principle of adjacent equalization for battery system ( Li ion or Lifepo4 ).  it should be applied together with Battery BMS. The pressure difference resulting from  charging and discharging  which will triggers the operation of the Balancer board to achieve energy transfer equalization.

C . Electrochemical inconsistency
Electrochemical inconsistency occurs during the battery charging and discharging process. Even if the production and processing of the two cells are exactly the same, the thermal environment can never be consistent during the electrochemical reaction. For example, when making battery modules, the surrounding temperature of battery system will be definitely lower than middle position , which will cause long-term inconsistency in charge and discharge and therefore causes inconsistency capacity with cells , and when the separator film of the battery has imbalance charging and discharging currents for a long time, the battery separator will aged.therefore takes Inconsistence.

Battery inconsistency will affect the performance of the battery pack. Battery packs which were connected in series and follows the short- board effect of the barrel. for battery pack system connected in series, the capacity of the entire battery pack is determined by the lowest cell’s capacity, which results in:
1. Reduce the actual available capacity of the entire battery pack.
2. when The life of the battery pack is reduced, and the capacity is reduced,which will need to increase more times of charge and discharge cycles to let battery work, which will short battery life further.
3. safety performance will be seriously affected when battery consistence were terrible .

Our advantages with active Balance :

Our professional Power management chip which integrated battery overcharge, over-discharge, over-current, short circuit, disconnection, temperature detection and other protections

With large active balancing current, the balancing current can reach up to 5A, and the balancing voltage precision can be within 5mV.

Active will work in those process: 1. Active Balance will work throughout the whole charging process. 2. Controllable Balance in standby process, 3. Automatically starting balance when the voltage difference between cells exceeds 45mV

It solved the problem of low cycle times and short service life of battery packs due to inconsistent battery capacity, voltage difference, and internal resistance difference, making the product safer and more reliable, therefore prolong whole battery work life
significantly .

Solve the problems of low efficiency, small balancing current of general passive balancing methods. The application fields include power tools battery, photovoltaic battery,

Outdoor energy storage battery , battery replacement cabinets, electric bicycles battery ,or EV battery etc.

transaction terms :
1) Shipment time : once received your order ,we will proceed it quickly within 3~4 working days without problems .order can be cancled within these days ,otherwise we will reject to cancle the order ,because our items can not get back when in the process of shipment . we will inform our buyer if  there is a stock problems with the order and arrange a properly agreenment on the shipment schedule by email .

2) Shipment Methods : Client can choose suitable shipment methods based on your demand ,Post air parcel service or Express service , we will ship all orders strictly in according to the selected shipment methods by our customer . normally , Post parcel shipment time takes 7~60days depends on different countries serivce . and express takes 2~15days to the destination normally .

3) About Tracking number : Tracking number will be uploaded and will be informed by the registered email on each Friday ,please pay attention to your email later on for the tracking number update .

4) Quality Service : we will take a full responsibility for any defect product caused by our design and production problems ,warranty time is 12 months since the shipment date . but for any defect product caused by any wrong or slavery application from customers . we will not take the responsibility for that , because for this BMS product ,it do need some skills to make installation . please consult us in advance if you are not clearly with bms connection in the hope of avoid any mistakes of connection . if Buyer damaged the BMS , we can offer the free repairing service to our client , but client should take care of shipment cost .please know it kindly in advance . thanks