24V 12ah lifepo4 battery. Product Description

v 12ah lifepo4 battery

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Li-ion Battery Pack 24V 12Ah Rechargeable Battery

Place of Origin China Brand name GreenBatt Payment Terms L/C,Others,T/T,Western Union Production method Negotiable Shipping / Lead Time Negotiable / Negotiable Keyword li-ion battery, rechargeable battery, li-ion battery pack, battery pack 24v, Category Battery Packs

Membership PRO Country / Year Established China / 2009 Business type Manufacturer

Verified Certificate 8

Product Information

Features 1) Li-ion battery with high capacity, light weight, high consistency, high security. 2) Electric bike battery with long cycle life 1500 times. 3) No memory effect, environmental friendly 4) High gravimetric specific energy, high volumetric specific energy, good deep discharge capacity. 5 ) Rechargeable battery can be customized. Cells can be combined in series to increase voltage and parallel to increase capacity. Specificaiton Of Li-ion Battery Pack 24V 12Ah Rechargeable Battery

What Causes Lithium-ion to Age?

The lithium-ion battery works on ion movement between the positive and negative electrodes. In theory such a mechanism should work forever, but cycling, elevated temperature and aging decrease the performance over time. Manufacturers take a conservative approach and specify the life of Li-ion in most consumer products as being between 300 and 500 discharge/charge cycles.

Evaluating battery life on counting cycles is not conclusive because a discharge may vary in depth and there are no clearly defined standards of what constitutes a cycle(See BU-501: Basics About Discharging). In lieu of cycle count, some device manufacturers suggest battery replacement on a date stamp, but this method does not take usage into account. A battery may fail within the allotted time due to heavy use or unfavorable temperature conditions; however, most packs last considerably longer than what the stamp indicates.

The performance of a battery is measured in capacity, a leading health indicator. Internal resistance and self-discharge also play roles, but these are less significant in predicting the end of battery life with modern Li-ion.

Figure 1 illustrates the capacity drop of 11 Li-polymer batteries that have been cycled at a Cadex laboratory. The 1,500mAh pouch cells for mobile phones were first charged at a current of 1,500mA (1C) to 4.20V/cell and then allowed to saturate to 0.05C (75mA) as part of the full charge saturation. The batteries were then discharged at 1,500mA to 3.0V/cell, and the cycle was repeated. The expected capacity loss of Li-ion batteries was uniform over the delivered 250 cycles and the batteries performed as expected.

Eleven new Li-ion were tested on a Cadex C7400 battery analyzer. All packs started at a capacity of 88–94% and decreased to 73–84% after 250 full discharge cycles. The 1500mAh pouch packs are used in mobile phones.

Although a battery should deliver 100 percent capacity during the first year of service, it is common to see lower than specified capacities, and shelf life may contribute to this loss. In addition, manufacturers tend to overrate their batteries, knowing that very few users will do spot-checks and complain if low. Not having to match single cells in mobile phones and tablets, as is required in multi-cell packs, opens the floodgates for a much broader performance acceptance. Cells with lower capacities may slip through cracks without the consumer knowing.

Similar to a mechanical device that wears out faster with heavy use, the depth of discharge (DoD) determines the cycle count of the battery. The smaller the discharge (low DoD), the longer the battery will last. If at all possible, avoid full discharges and charge the battery more often between uses. Partial discharge on Li-ion is fine. There is no memory and the battery does not need periodic full discharge cycles to prolong life. The exception may be a periodic calibration of the fuel gauge on a Smart battery or intelligent device(See BU-603: How to Calibrate a “Smart” Battery)

The following tables indicate stress related capacity losses on cobalt-based lithium-ion. The voltages of lithium iron phosphate and lithium titanate are lower and do not apply to the voltage references given.

Table 2 estimates the number of discharge/charge cycles Li-ion can deliver at various DoD levels before the battery capacity drops to 70 percent. DoD constitutes a full charge followed by a discharge to the indicated state-of-charge (SoC) level in the table.

100% DoD is a full cycle; 10% is very brief. Cycling in mid-state-of-charge would have best longevity.

Lithium-ion suffers from stress when exposed to heat, so does keeping a cell at a high charge voltage. A battery dwelling above 30°C (86°F) is considered elevated temperature and for most Li-ion a voltage above 4.10V/cell is deemed as high voltage. Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling. Table 3 demonstrates capacity loss as a function of temperature and SoC.

What Can the User Do?

Environmental conditions, not cycling alone, govern the longevity of lithium-ion batteries. The worst situation is keeping a fully charged battery at elevated temperatures. Battery packs do not die suddenly, but the runtime gradually shortens as the capacity fades.

Lower charge voltages prolong battery life and electric vehicles and satellites take advantage of this. Similar provisions could also be made for consumer devices, but these are seldom offered; planned obsolescence takes care of this.

A laptop battery could be prolonged by lowering the charge voltage when connected to the AC grid. To make this feature user-friendly, a device should feature a “Long Life” mode that keeps the battery at 4.05V/cell and offers a SoC of about 80 percent. One hour before traveling, the user requests the “Full Capacity” mode to bring the charge to 4.20V/cell.

The question is asked, “Should I disconnect my laptop from the power grid when not in use?” Under normal circumstances this should not be necessary because charging stops when the Li-ion battery is full. A topping charge is only applied when the battery voltage drops to a certain level. Most users do not remove the AC power, and this practice is safe.

Modern laptops run cooler than older models and reported fires are fewer. Always keep the airflow unobstructed when running electric devices with air-cooling on a bed or pillow. A cool laptop extends battery life and safeguards the internal components. Energy Cells, which most consumer products have, should be charged at 1C or less. Avoid so-called ultra-fast chargers that claim to fully charge Li-ion in less than one hour.


[1] Courtesy of Cadex [2] Source: Choi et al. (2002) [3] B. Xu, A. Oudalov, A. Ulbig, G. Andersson and D. Kirschen, Modeling of Lithium-Ion Battery Degradation for Cell Life Assessment, June 2016. [Online]. Available: https://www.researchgate.net/publication/303890624_Modeling_of_Lithium-Ion_Battery_Degradation_for_Cell_Life_Assessment. [4] Source: Technische Universität München (TUM) [5] With permission to use. Interpolation/extrapolation by OriginLab.

The material on Battery University is based on the indispensable new 4th edition of Batteries in a Portable World. A Handbook on Rechargeable Batteries for Non-Engineers which is available for order through Amazon.com.

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Hello, first thabks a lot for the very valable information you gather here and make very easy to understand. However, I m building a battery pack for ebike and wondering if it makes sense having a standard BMS that will balance at full charge 4,2V probably and a charger set to 90% so 4,0V ? So I wont have a balanced pack over the time. My main concern is to have a long life cycle battery. I ll use Sanyo NCR18650GA fin a 10.5ah 36V pack. I know of Smart BMS that can set balancing voltage, but they are expensive and I heard their bluetooth consume extra battery. Thanks ahead for your help

After charging my lithium battery. would it be beneficial to store the battery in the refrigerator at 4 c ?

After charging my lithium battery. would it be beneficial to store the battery in the refrigerator at 4 c ?

I have two queries: 1.) In Table 2, where you have shown Discharge cycles against a DoD. Does this ‘discharge cycle’ in each row denote the same complete 1 Cycle(100% amount discharged and charged, not necessarily in one go) as we understand in battery terminology. Does this one ‘discharge cycle’ imply the same amount for all the rows in the table. Or does it derive its meaning from the respective DoD. For e.g. does each discharge cycle at 80% DoD mean the same ‘100% Discharge/Charge Cycle’ as what is there for 60% DoD? If not, then one discharge cycle at 80% DoD would quantify for 80 units of charging/discharging and one discharge cycle at 60% DoD would mean 60 units. This would mean that 400 Discharge Cycles at 80% DoD, would have delivered 40080 = 32000 Units. 600 Discharge cycles at 60% DoD would deliver 60060 = 36000 Units. And both, as the table suggested, would be left with 70% Capacity.Still pretty good, even if discharge cycle mean different amount of cycle for two different DoD %. But if ‘discharge cycle’ mean the same amount, then it would be even more compelling. 400100 = 40000 units vs 600100= 60000 units delivered with 70% Capacity remaining.

2.) Similarly,Figure 6 should be interpreted wrt context.

Consider two extremes cycles: 75–65%. Black Line 100–25%. Orange Line

After, 400 DST cycles of 100-25% cycle it would have delivered 30000 Units(75400) and would be left with ~92%(from the figure) capacity. For 75–65% cycle, it would have to complete 3000 DST cycles to deliver same amount of units (103000) and it would be left with ~95% capacity. So, 75-65% is actually 3% better than 100-25% when both have gone through same amount of discharging/charging units. No two cycles should be compared for retention capacity on the same vertical line of DST cycles since by that time they have gone through amounts of charge/discharge units. Still, I think as mentioned in my previous point, even for the same amount of units delivered, narrow charge-discharge bandwidth would leave you with more capacity.

Figure 6 is informative, but there is not enough information (at least on this page) to conclude how exactly low voltage affects battery cycles as opposed to high voltage. Does charging from 0-75% have the same effect as 25%-100%? What about 0-85% compared to 15-100%? It is stated in several places that fully discharging is bad for a battery, but is it really? Or is it a myth, given how damaging charging to 100% SoC is?

Alex, Accubattery analyzed figure 6 and found that 75-65% wears 17.5% in 1000 cycles, 75-45% 8.8% and 75-25% 6.5% so that means the depth of discharge does not wear. it’s ok to use up to 0%. link:https://accubattery.zendesk.com/hc/en-us/articles/360016286793-Re-Modeling-of-Lithium-Ion-Battery-Degradation-for-Cell-Life-Assessment

The thing is, the smaller the SoC, the high the cycles. I have an always on tablet. I did some testing and my results conclude the SoC has very little effect on capacity retention given this relationship:

SOC 25-85 25-75 45-75 65-75 Hours for SoC Cycle (including charging) 24 20 8 4 Cycles (1Y) 365 438 1095 2190 Cycles (5Y) 1825 2190 5475 10950 Cycles (10Y) 3650 4380 10950 21900 % Retention 5 Years ~91 ~91 ~89 ~87 % Retention 10 Years ~87 ~88 ~86 ~84

According to SOK battery tech support, this information does not apply to their LiFePo4 batteries or that chemistry in general. Biggest issue would be lack of top balancing unless you have external balancer. I’ll still check around to see what can make these last longer. Their recommendation was to lower the usable capacity on the bottom end to extend lifetime (increased charge cycles but lower usable capacity).

Basic Info.

Features of LiFePO4 Battery

You may also interested in

Nominal Capacity: 200Ah Nominal Voltage: 25.6V Energy: 5120Wh Charge Method: CC/CV Charge Voltage: 28.8±0.4V Recommend Charge Current: 40A (0.2C) Max. Continuous Charge/Discharge Current (BMS): 200A Max. Discharge Current 5 Seconds: 400A Max. Continuous Load Power: 5120W Internal Impedance: ≤40mΩ Protection Class: IP65 Cycle Life: 4000 cycles @ 100%DOD, 6000 cycles @ 80%DOD, 15000 cycles @ 60%DOD Dimension: ‎ 20.4710.598.66 inches Weight: Approx. 82.01 Pounds Working Temperature Range: Charge: 0℃ to 50℃ / 32℉ to 122 ℉ Discharge:.20℃ to 60℃ /.4℉ to 140 ℉ Storage:.10℃ to 50℃ / 14℉ to 122 ℉

Just bought 2 x100w s panels w 40a mppt c controller. plan to buy 12v 100ah bat. what size of psw inverter should pair with, future add 2 more s panel?

Hi, our 12V(12.8V) 100Ah LiFePO4 battery built-in 100A BMS, which could support 100A max. continuous charge/discharge current, 1280W max. load power, and 1280Wh max. energy. In general, the power of the inverter depends on the power of your load. Most of our customers will use 1000W PSW inverter for one of our 12V(12.8V) 100Ah LiFePO4 batteries. To help you analyze and optimize your battery system precisely, we welcome you to contact us at service@redodopower.com, and we will help you with an in-depth analysis according to your detailed information.

Plan to buy 1x 12v 100ah life04 battery and add another solar panels depend on the outcome. will a 2200w psw inverter work with 1 battery now?

12ah, lifepo4, battery, product

Hi, our 12V(12.8V) 100Ah LiFePO4 battery built-in 100A BMS, which could support 100A max. continuous charge/discharge current, 1280W max. load power, and 1280Wh max. energy. In general, the power of the inverter depends on your power of load. A 2200W PSW inverter will also work with one 12V(12.8V) 100Ah LiFePO4 battery, and it still has room to extend by adding batteries if there are more appliances in. However, it is still depends on the power of your load. To help you analyze and optimize your battery system precisely, we welcome you to contact us at service@redodopower.com, and we will help you with an in-depth analysis according to your detailed information.

Hi, many of our customers use 2 of Redodo 12V(12.8V) 100Ah LiFePO4 batteries connecting in series for their 24V trolling motor, and it works well. But it is also depends on the power of the trolling motor. One of our Redodo 12V 100Ah LiFePO4 batteries could support 100A max. continuous charge/discharge current, 1280W max. load power, and 1280Wh max. energy. Connecting two of Redodo 12V 100Ah LiFePO4 batteries in series will build a 24V(25.6V) 100Ah battery system, which could support 100A max. continuous charge/discharge current, 2560W max. load power, and 2560Wh max. energy. To help you analyze and solve your question about the batteries more specifically, we welcome you to contact us on service@redodopower.com, and we will help you with an in-depth analysis according to your detailed information.

Dear Customer, 1)Yes, 1 charger could works for 2pcs Redodo 12V(12.8V) 100Ah LiFePO4 batteries which connected in series. One 12V 100Ah LiFePO4 battery built-in 100A BMS, which could support 100A max. continuous charge/discharge current, 1280W max. continuous load power, and 1280Wh max. energy. Connected 2pcs of those 100Ah batteries in series will build a 24V(25.6V) 100Ah battery system, which could support 100A max. continuous charge/discharge current, 2560W max. continuous load power, and 2560Wh max. energy. Regarding the charger for the 24V 100Ah battery system, we recommend a dedicated LiFePO4 battery charger, the DC charging voltage should be between 28.4V~29.2V and charging current less than 100A (usually, we recommend the current of 0.2C, which means 20A, and it will take around 5hrs to fully charge the battery system). 2)Here are two steps are necessary in order to reduce the voltage difference between batteries before connection, and through these, the battery system can perform the best of it in series or/ and in parallel. Step① fully charge your batteries separately. Step② connect your batteries one by one in parallel, and leave them together for 12~24hrs. And then, you can connect your batteries in series or/ and in parallel to build your own battery system. BTW, for charging one 12V 100Ah LiFePO4 battery, we recommend a dedicated LiFePO4 battery charger, the DC charging voltage should be between 14.2V~14.6V and charging current less than 100A. To help you analyze and optimize your battery system precisely, we welcome you to contact us on service@redodopower.com, and we will help you with an in-depth analysis according to your detailed information.

Batteries in Series vs. Parallel: Which is Right for Me?

Stumped on whether to put your batteries in series vs. parallel? Ultimately, the method you use depends on the needs of the applications you’re trying to power.

12ah, lifepo4, battery, product

Let’s take a look at the advantages and disadvantages of each method.

Batteries in Series: Advantages and Disadvantages

12ah, lifepo4, battery, product

Putting batteries in series is usually the better choice for large applications that need high voltage. (Say, more than 3000 watts, for example). Higher voltage means a lower system current, so you can use thinner wiring. There will also be less voltage drop.

There’s one main disadvantage of connecting batteries in series vs. parallel. When you do this, all your applications have to function at the higher voltage. For example, if you connect two 12V batteries in series, you’ll end up with 24V. You won’t be able to power any 12V appliances unless you use a converter.

Batteries in Parallel: Advantages and Disadvantages

What’s the principal advantage of wiring batteries in parallel vs. series? Voltage stays the same, but you can run your applications longer because you’ve increased the capacity. Also, if there’s a problem with one battery, it won’t affect the others. The working batteries will continue to power your appliances.

As far as disadvantages, placing batteries in parallel can make them take longer to charge. Also, the lower voltage means higher current draw and more voltage drop. It may be difficult to power large applications, and you’ll need thicker cables.

Batteries in Series vs. Parallel… or Series-Parallel?

In the end, neither connection method is “better” than the other. Choosing to wire your batteries in series vs. parallel ultimately depends on what works best for your boat, solar setup, RV, or other power needs.

But there is one more choice. Series-parallel. This doesn’t mean you wire your batteries in both series and parallel. That would short your system!

A series-parallel connection is achieved by wiring several batteries in series. Then, you create a parallel connection to another set of batteries in series. By doing this, you can increase both voltage and capacity.

Questions about connecting batteries in series vs. parallel, or series-parallel? See if you can find the answers below, or contact our lithium battery experts here.

Series vs. Parallel Quick Answers

Does connecting batteries in parallel increase amp hours?

Yes. When you connect your batteries in parallel, you increase the amp-hour capacity of your batteries. The voltage stays the same.

For example, let’s say you connect two 12v 100ah batteries in parallel. It’ll stay a 12 volt system, but the amps will double to 200ah. And of course, the batteries will last a lot longer.

What happens when you put two 12 volt batteries in series? When you have two or more 12 volt batteries hooked up in series, you develop 24 volts, but your amps don’t change. On the other hand, if you have those 12 volt batteries wired in parallel, it’s still a 12 volt system, but the amps will increase. (See example in the section below.)

Do batteries last longer in series or parallel? Batteries last longer in parallel, because the voltage remains the same, but the amps increase. If you connect two 12v 50ah batteries in parallel, it will still be a 12 volt system, but the amps will double to 100ah, so the batteries will last longer. On the other hand, when batteries are connected in series, voltage is increased while capacity (ah) stays the same.

Can you put Lifepo4 batteries in series? It depends on the batteries – if you have Ionic batteries, chances are you can (double check though). Many Lifepo4 batteries can’t be hooked up in series, because they’ll get damaged. But most Ionic lithium batteries are capable of series connections. Not all of them are though, so please check your battery’s user manual to make sure.

Is series or parallel more powerful? A parallel circuit consumes more power. Compared to series (both having the same voltage), parallel causes much more power to be dissipated by each of the resistors.

Which is safer, series or parallel? Generally speaking, neither is safer than the other. They’re more or less equally safe. Supply voltage is the main thing that matters there.

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