SUNKKO Battery Active Equalizer Voltage Balancer for Lithium Battery Pack 4S 8S 13S 16S 24S 5A/8A

USER MANUAL(5A)

USER MANUAL(8A)

5A Tutorial Video

8A Tutorial Video

Balance and repair the voltage difference of high-capacity battery pack, restore the capacity and refresh your battery pack

SUNKKO equalizer adopts high-frequency transformer inversion and equipotential isolation coupling energy technology to realize the parallel connection of each series of batteries through equipotential isolation coupling. Based on the parallel connection state, each series of batteries with different high and low voltages realize energy transmission and distribution, and finally realize the high-efficiency and precise balance of the battery pack, The Taiwan main control chip MCU combines with the ultra-low dynamic impedance inverter to obtain the more than 5A balanced current. The precise transformer process and fully symmetrical circuit design can achieve the balanced effect of ≤ 30mV.

Features and advantages

1. Nano amorphous isolated fully symmetrical transformer ensures the minimum voltage difference:

2. American ultra-low internal resistance MOS devices constitute an ultra-low dynamic impedance inverter circuit. Achieve high power balance;

3. The control and management of intelligent MCU chip realize automatic self balancing;

4. Automatically detect the minimum voltage of the battery, stop working when the battery energy is low, and protect the battery from power loss;

5. Overcurrent fuse resistance at each series input end to ensure safety;

6. With automatic / manual trigger dual mode;

7. Manual forced equalization timing off function, easy to use.

8. Miniature circuit breaker device for over temperature and over-current protection, control the instantaneous abnormal excessive current, disconnect at over temperature, protect the normal and continuous balance of the battery pack.

Product model:BAL-504/508/513/516/524/804/808/813/816/824

Applicable battery type:Li-ion / LiFePo4 

Applicable number of battery strings: 4S/8S/13S/16S/24S

Best balance effect: 0.01 - 0.02V

Recommended equalizing battery voltage: above 3.2V

Equalizing current: 0 - 5A/8A

Forced equalization timing: 60 minutes

Power consumption of standby load < 5ma12V (Power supply of the fourth string)

Equalization principle: High voltage energy is transferred to low voltage parallel transmission at the same time to realize battery voltage balance.

Explanation of equalizing current, equalizing time, equalizing connection and equalizing minimum differential pressure

1.The equalization current marked on the equalization module and equalizer is the maximum current that can be output or absorbed by the product, and it is also the maximum current allowed to flow through the chip on the product.

2.When the equalizer is actually used to equalize the battery pack, the equalized current is affected by the following factors:

1. Internal resistance of battery pack;

2. Resistance of connecting cable;

3.Contact resistance of connector;

4. Voltage difference between battery cells (unbalanced condition)

A: The smaller the internal resistance of battery pack, the greater the equilibrium current

B: The smaller the resistance of connecting wires and connectors, the greater the equilibrium current.

C: The greater the voltage difference of the battery, the greater the equilibrium current

5A current test conditions:

Voltage difference between batteries ≥ 0.5V, connecting line battery < 8m Ω (single wire)

Internal resistance of battery ≤ 15m Ω, connector resistance < 4m Ω

Measurement method of equalizing current:

Since the equalizing current is affected by the loop resistance, the loop resistance will be increased and the equalizing current will be reduced when the ammeter is connected, so the access ammeter is not recommended. In addition, disconnecting the equalizing line during normal equalizing operation will lead to the risk of battery short circuit and damage to the equalizer. Therefore, the test current can only be measured by DC Clamp ammeter.

Equilibrium time correlation

A: Under the condition of the same internal resistance of battery, if it can work in equilibrium with the maximum current, the time will be shorter, and the smaller the resistance of connecting line and connector, the shorter the time will be.

B:The equalization time of high-capacity battery pack will be longer.

C:The smaller the equalizing voltage difference, the longer the time.

D:In the final stage of equalization, the voltage difference is very small, so the current is also very small, this period takes a long time.

E: When active continuous online equalization is adopted, the equalization state is ideal, and the battery voltage difference can also be controlled between 30mv-80mv. You don’t need to pay attention to time by this way.