Resistance disequilibrium will affect the security of the battery 

The disequilibrium will be not only let the battery capacity come to small, but also possible let the battery over charged or over discharged etc.

Let's have a careful analysis of the two situations:

First of all: the battery capacity become small.

For example: Three series battery pack application, when the initial, A, B, C three single battery for 100% of capacity, but in the long-term use, the batteries have had uneven, resulting in at some point, A 80% of the remaining battery capacity, B Battery of the remaining 40% of capacity, C battery of the remaining 60% capacity; If Charged the three series pack batterys, due to the protection of high voltage, When A is charged 100% full and let the charger closed , B Battery capacity for only 60%, C for 80% of battery capacity and thus give rise to the battery pack inside the battery B and C is not fully charged. In the battery pack for discharge, as a result of over discharge voltage  protection, when B the battery discharger to 0%, A battery will have 40% of capacity, C batteries have 20% of capacity; It means in the series pack battery there will be A and C capacity not discharge full.  

Second, for had the potential to cause serious charge, over discharge. 4 cells in series , for example battery pack (single point for over-voltage 4.2V; points for under-voltage 3.0V; only to protect the pack battery 4 in series, no single battery voltage monitor.) In use for a long time , Resulted in batteries capacity is not balanced. Without single battery voltage monitor, when discharged , although the battery pack voltage of 12V to meet the protection of the set, but it is 3.6V +3.2 V +3.2 V +2.0 V = 12V, of which the minimum The battery voltage imbalance has been as low as 2.0V, had already  have  situation for a serious over discharge. When Charged battery Pack , while the over-voltage protection 16.8V to meet the set, but 4.7V +4.1 V +4.1 V +3.9 V = 16.8V, which has reached the highest imbalance battery voltage 4.7V, this is a very dangerous phenomenon of overcharge.

Resistance equilibrium Technology have big development Potential.

 After we know the reason and shortcomings from battery imbalance, we need consider the current balance and the time when need take action for the balance  and the define balance point when we design Resistance equilibrium Technology. Consider a number of batteries along with a balanced, taking into account the overall Balanced design of the heat.

 Nowadays, how to solve Resistance unbalance problem from multiple battery pack or single battery with economical and stability way is more and more important for the power applications of power tools, electric bicycles, light electric vehicle . In theory there are many balanced approach, which, the resistance (diversion) is considered a balanced manner is the most economical and practical way. In this basis, AO-TU science and technology put forward the balance of smart technology Battery Bleeding-on-Demand (BOD) technology. The technology provided by the parameters of a balanced set of batteries were designed when the overall balance of heat to consider. For the application of Balance of heat loss with limit high ,we can choose low a balanced current, high voltage start a balanced, low accuracy, as well as reduce the number of the battery in series to reduce heat loss of balance; In the situation that heat capacity of the battery pack requirements is easy , You can choose a higher balance of the current, low voltage start a balanced, high precision balance, as well as more battery in series to increase the number of battery-balanced speed.