Active Balancer 3-21S 5A battery equalizer for LiFePO4/LiPo/LTO

As the number of battery cycles increases, the rate of battery capacity decay is inconsistent, leading to a serious imbalance in battery voltage. The “battery barrel effect” will influence the service life of your battery. That’s why you need a active balancer for your battery packs.

Different from inductive balancer, capacitive balancer can achieve the whole group balance. It doesn’t need voltage difference between adjacent batteries to start balancing. After the device is activated, each battery voltage will reduce the capacity decay caused by the battery barrel effect and prolong the duration of the problem.

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Product Detail

Product Tags

Specifications

3-4S
4-6S
6-8S

9-14S
12-16S
17-21S

Product Information

Brand Name:	Heltecbms
Certification:	FCC
Origin:	Mainland China
Warranty:	One year
MOQ:	1 pc
Battery Type:	LifePo4/Lipo/LTO
Balance type:	Capacitive Energy Transfer / Active Balancing

Customization

Customized logo(Min. order 1000 pieces)
Customized packaging(Min. order 1000 pieces)
Graphic customization(Min. order 1000 pieces)

Package

1.5A active balancer *1set.
2.Antistatic bag, antistatic sponge and corrugated case.
3.With acrylic protective case(Optional).

heltec-5a-5.5a-active-balancer-3s-21s-24v-48v-battery-equalizer

heltec-5a-5.5a-active-balancer-48v-battery-equalizer

Purchase Details

Shipping From:
1. Company/Factory in China
2. Warehouses in United States/Poland/Russia/Brazil
Contact Us to negotiate shipping details
Payment: 100% TT is recommended
Returns & Refunds: Eligible for returns and refunds

Features

All group balance
Max balance current 5.5A
Capacitive energy transfer
Safe and fast heat dissipation
Equalization current 0-5.5A, the more balanced the battery, the smaller the current, with manual sleep switch, sleep current mode is less than 0.1mA, the balance voltage accuracy is within 5mv!
The quiescent current is about 12 mA. It is recommended that the battery capacity is 60-300AH.
With under-voltage sleep protection, the voltage will stop automatically when the voltage is lower than 3.0V, and the standby power consumption is less than 0.1mA.

Working principle

The bigger the differential voltage, the bigger the equalization current; and the more balanced the battery, the smaller the working current. This active balancer can reach the maximum equalizing current of 5.5A and the balance voltage accuracy is within 5mV. Meanwhile, it will only release less than 0.1mA current under sleep mode.

With under-voltage sleep protection, the voltage will stop automatically when the voltage is lower than 3.0V for NCM/LFP battery, and 1.8V for LTO battery. The standby power consumption is less than 0.1mA.

Model Selection

Technical Index	Product Model
Applicable Battery Strings	3S-4S	4S-6S	6S-8S	9S-14S	12S-16S	17S-21S
Applicable Battery Type	NCM/LFP/LTO
Working Range of Single Voltage	NCM/LFP: 3.0V-4.2V LTO: 1.8V-3.0V
Voltage Equalization Accuracy	5mv (typical)
Balanced Mode	The whole group of battery participate in the active equalization of energy transfer at the same time
Equalizing Current	0.08V differential voltage generates 1A balance current. The bigger the differential voltage, the bigger the balance current. The maximum allowable balance current is 5.5A.
Static Working Current	13mA	8mA	8mA	15mA	17mA	16mA
Product Size (mm)	661616	696916	917016	1258016	1259116	14513018
Wordking Environment Temperature	-10℃~60℃
External Power	No need for external power supply, relying on the internal energy transfer of the battery to achieve the whole group balance

More versions:

1. Version for using on LTO battery by default (Welding LTO pad of Balancer 4-6S/6-8S/12-16S/9-14S/17-21S)

2. 5.5A balancer for LFP battery , stop when first cell voltage is 3.3V and start working when voltage is 3.465v

3. Add PH2.0 connector at RUN pad ,balancer is not working by default. Ship the cable together

* We keep upgrading products to meet requirements of our clients, please contact our sales person for more accurate details.

Updated Versions

Take the standard 3-4S 5A Balancer (0855A) as example to demonstrate the updated versions of our 5A active balancer. Most of the balancers can be customized. Please contact our sales person for your own application.

SKU	Definition
0885A	Standard version.
0855C	For LTO battery only. (not for NCM/LFP)
0855D	Stop balancing when cell 1 (the first cell of the first string) is 3.3V; and when it reaches 3.456V, re-start balancing.
0855PH2	PH2.0 connector instead of RUN point, balancer not in work by default. Wires can be connected to a switch or any BMS, so you can control the on and off of this balancer.

For example:

You have 16S LFP/NCM cells, and you want the balancer to stop balancing when cell 1 (the first cell of the first string) is 3.3V; and when it reaches 3.456V, re-start balancing. You can choose our 0999A16D balancer.

It has the same appearance as standard version but changed in chips design.

You have 6S LTO cells, you can choose our 1004C balancer. It’s specially designed for 6S LTO battery.

You have 4S LFP cells and you want to be able to control the on and off of the balancer, you can choose our 0855PH2 balancer. Connect the other end of the additional red wire to a switch or soldered to your BMS, you can turn the balancer on and off without keeping it working all the time.

Accessories

TFT-LCD Display (with voltage collection function)

It is connected directly to the battery and can be used in parallel with any balancer or protection board. It displays the voltage of each string and the total voltage. Regarding accuracy, the typical accuracy is ±5mV at room temperature around 25°C, and the accuracy is ±8mV in the wide temperature range of -20~60°C. The direction of voltage deviation cannot be guaranteed to be consistent.

Acrylic Protective Case (All versions available)