Battery Packs Get Balanced Just as Promised

We’ve recently received a lot of good feedback about how accurate the Battery Voltage-Amperage Balancers/Equalizers are. We make the claim that the Battery Balancers keep the batteries voltage difference within 10mV, and we’ve had that confirmed many times by those who’ve used them to balance their battery packs.

Balancer Feedback

Here’s a small sampling of the comments we’ve received about the Balancers:

“The Lithium balancers are keeping my 7S 24V EV battery based off-grid "shore power" solution for my motorhome balanced within 0.01V per cell. Going to check with ECPC any time I need something to do with batteries or power solutions.”

“Very pleased with their function. Bought 7 for a 24V LiPo battery. At rest, they were within .05V. once current flowed in and out of the battery they pulled to within .01.”

“I tried many cheap units, but none worked then called and asked what Electric Car Parts Company recommended and I ended up getting these. Took a couple days but my lithium system is now balanced and working great. Thank you!”

Why you need a Battery Balancing System

The individual cells in a battery pack are rarely an exact duplicate of all the cells in the battery pack.

In actual practice, when a pack of batteries reaches a specified charge cutoff voltage than the charger will shut off. If one cell in a pack reaches that voltage before other cells reach a full charge it will cause the charger to shut off – prematurely denying the balance of the pack a full charge.

Conversely, when the weakest cell in a pack reaches its discharge cutoff voltage it will show as the discharge point and shut down the pack prematurely – thereby denying the user the balance of energy the other cells have stored.

These battery equalizers prevent this from happening. This yields up to 30% more power and will extend the life of the battery pack.

Benefits and Features

·         Quick and easy installation

·         Keeps your batteries voltage difference within 10mV!

·         Keeps your batteries safe at all times. May increase the lifespan of your battery pack by 2-3 times by preventing the batteries from being overcharged or over discharged.

·         High-frequency pulse, dynamic battery voltage-amperage balancer.

·         Simple wiring and high efficiency

·         Low price. You pay a small amount to protect your battery. Compared to the cost of replacing your expensive Lithium Battery, the Balancer is very inexpensive.

·         Fast delivery, 1~2 business days.

·         Works with all charger amperage and voltage inputs.

·         All 1S Single Balancers come with the interconnecting and battery wiring

·         0.5m / 1.5ft / 0.5m maximum suggested wire length for all the multiple series balancers. (35m 4S, 5S, 6S, 8S)

·         Idle Current Draw is <50mW.

·         Series modules may work with 3, 4, 5, 6, or 8 batteries in series (AKA 3S, 4S, 5S, 6S, or 8S).

·         Series modules do not come with the wiring to connect to the batteries.

Illustration to show how Battery Balancers protect Batteries 

This diagram shows how balancers work. Each battery is compared to a cup. Each balancer is like a pump. With the pumps, all the cups will have the same level of water. The balancers are connected in parallel to the batteries. They won’t affect the charging or discharging of the batteries.

Having an effective Battery Management System (BMS) is essential to protect any Lithium Battery Pack. We’re very glad to have low-cost solutions that work consistently and to the right specifications.

See the Battery Balancing Solution Here

Simple and Reliable Battery Management System

Simple BMS

Battery Management System

For Lithium LiFePO4 Battery Packs in Series

We are excited to announce our brand new Battery Management System (BMS) called the Simple Lithium BMS. We got a large shipment in to our office of many sizes and voltages. The 12V 100A 4S BMS is pictured above with a wiring diagram to show connections.

In addition to the BMS System with a link above we also provide a BMS for Solar BMS applications. They come in 12V or 48V voltages and are for 4 or 16 Lithium LiFePO4 Battery Packs in series.

The top quality (A-level) Protective Circuit Board IC has Power Balancing Function and the circuit is simple and reliable.

We know that the Simple Lithium Ion BMS will replace many existing Battery Management Systems because of reasonable price and easy operation. Compare the Simple BMS to any other BMS and see for yourself why we love this new product!

Order Simple Lithium BMS – LiFePO4 Here!

Features for the 12V 100A 4S BMS:

• Top Quality (A-level) Protective Circuit IC
• Strong Load Ability, Constant Discharge Current 100A, High Voltage Resistance, Low Inner Resistance Power Mosfet
• IC itself has power balancing function. The circuit is simple and reliable.
• Typical voltage detection for each cell. Each battery will be prevented from over-charging or over-discharging. Over current and short circuit protection function is very reliable. Long-time short-circuit of the load won’t affect the PCB and the battery. Temperature protection during charging and discharging.
• Extremely Low Power Consumption. The consumption of the whole device is less than 50uA.
• The PCB uses high anti-corrosion, high water resistance, and high impedance ESD conformal coating

Specifications for the 4S BMS:

CONSTANT DISCHARGE CURRENT	100A
PEAK DISCHARGE CURRENT	220A
CHARGE VOLTAGE	14.4V
MAX CHARGE CURRENT	100A
OVER CHARGE PROTECTION VOLTAGE	3.6V
POWER BALANCE VOLTAGE	3.6V
BALANCE CURRENT	35mA
OVER DISCHARGE DETECT VOLTAGE	2.5V
OVER CURRENT PROTECTION	220A
SHORT CIRCUIT PROTECTION	External Load Short Circuit
MAIN CIRCUIT RESISTOR	<10 milliohms
WORKING TEMP F (C)	-22 to 176 (-30 to 80)

Frequently Asked Questions about the BMS/PCB

1, Which current PCB should I use?

Take a 13S 48V pack as an example: Which PCB you should use depends on the power of your motor or the current limitation of your controller. Below 350W, you can use 16A. Below 500W, you can use 18A, Below 800W, you can use 35A, Below 1KW, you can use 60A. Above 1200W, the same. If you are not sure, please contact us.

2, Can I use a bigger size of PCB than is indicated?

Suppose you need 60A PCB but you chose 80A, that will work.

80A allows for a higher current. A bit higher price is the only drawback.

But if you choose 50A, it will be too small. So you can use a higher spec but not a lower one than it should be.

3, What kind of charger should I choose?

A Lithium Battery must be charged by a Lithium Battery Charger. You can’t charge it with a lead acid battery charger because the lead acid battery charger might damage the MOS pipe of the PCB.

4, if I have a PCB, do I need any balancers?

Yes if you add QNBBM balancers, that will be perfect. 

The Main function of the PCB is to prevent batteries from over-charging over-discharging, over-heating etc.

With balancers added, the batteries lifespan will be longer and the capacity will get fully used.

5, How do I judge if my PCB is broken or not?

If you’d like to judge if the PCB is fine or not, please use a multi-meter and see if the voltage of each cell is close to one other or not. When the voltage difference is 1V, the battery will have this kind of performance: the driving distance will be short, it will be cut off when started, the charging time will be very short. Under such a situation, a battery is defective. When the PCB is broken, the battery can’t be discharged. When you measure the battery voltage, it will be normal.

Balancers/Equalizers with LED Indicator Lights

6 Amps (6000mA) Continuous Balancing!

Battery AH 50-1000!

Unlimited Cell Count

LiFePO4-LiMn2O4-NiMH-Li-Ion-Polymer-Lithium

Balances during charge, discharge, and storage

3V 1S Battery Voltage-Amperage

Balancers/Equalizers

With LED Indicator Lights

Order Battery Balancers Here!

View Balancers Connected to Batteries

More Explanation of How the Balancer Works Here

We recently expanded our line of Balancers/Equalizers to include ones with LED Indicator Lights. They perform the same tasks as the old Balancers like keeping your batteries voltage difference within 10mV and prolonging battery lifespan by 2-3 times.

Additionally it has a lighting system to indicate the status of your batteries. There are two LED indicators on the balancer which tells you the status of your batteries (charge or discharge) and status of the balancer (cut-off or working or faulty).

Cell balancing works similar to cups with different amounts of water in each. A balancer that is in the process of equalizing batteries is like a pump that is attached from one cup to another. With the pumps, all the cups will have the same level of water.

When a pack of batteries reaches a specified charge cutoff voltage then the charger will shut off. If one cell in a pack reaches that voltage before other cells reach a full charge it will cause the charger to shut off - prematurely denying the balance of the pack a full charge.

Conversely, when the weakest cell in a pack reaches its discharge cutoff voltage it will show as the discharge point and shut down the pack prematurely - thereby denying the user the balance of energy the other cells have stored.

These battery equalizers prevent this from happening. This yields up to 30% more power and will extend the life of the battery pack.

Ask us why we believe these battery balancers are better then a traditional Battery Management System (BMS)!

QUANTITY PRICING
1-3	$23.50
4-11	$22.75
12-23	$21.50
24-47	$21.00
48-95	$20.50
96-199	$20.00
200-499	$19.75
500+	$19.25

Features:

§  Balance current: 1A balance current when the voltage difference is 500mV

§  Balance accuracy: The voltage difference is <20mV after balancing

§  Working efficiency: >94% (at 1A)

§  Power consumption: After finishing balancing, the balance current is <20mA

§  Maximum acceptable voltage: DC 1,000V

§  Working temperature: -40F~176F (-40C~80C)

§  Storage temperature: -40F~212F (-40C~100C)

§  Relative humidity: 45%~90%

§  Parasitic current drain: 1 watt per day

§  Series modules

·        Modules may work with 3, 4, 5, 6, or 8 batteries in series (AKA 3S, 4S, 5S, 6S, or 8S)

·         Does not come with the wiring to connect to the batteries

Example:

A 144v pack of 48 cells,

20 in the front and 28 in the back

can use 8S+8S+4S in front

and 8S+8S+8S+4S in the back.