Customized 12V LiFePO4 Battery Pack Pack Factory

KET is a professional manufacturer specializing in the production of LiFePO4 batteries. We are committed to delivering high-quality and reliable LiFePO4 batteries for various applications. Whether you need LiFePO4 batteries for electric vehicles, renewable energy storage, or other industrial applications, KET is your trusted partner for superior battery solutions.

Why Choose KET?

customized 12v lifepo4 car battery Factory area: 7000m².

odm 12v lifepo4 car battery Total number of employees: over 200

odm 12v lifepo4 car battery manufacturer R&D team: 21 engineers

odm 12v lifepo4 car battery supplier Quality Management System: ISO 9001

China 12v lifepo4 Full Certified: CE, FCC, UL, MSDS, UN38.3

12v lfp battery manufacturer Production capacity: capable of producing 2000 battery packs per day

Customized 12V LiFePO4 Battery Pack Pack Factory

Stric Quality Control for Custom 12V LFP Battery Pack

1. Cell Capacity Division

2. Charge/Discharge Test

3. Incoming Material Inspection

4. High&Low Temperature Test

5. Aging Test

6. BMS Test

7. Vibration Test

8. Pearance Inspection

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LiFePO4 VS Lead-Acid: Why Choose LiFePo4 Battery

Energy Density
Compared to lead-acid batteries, LiFePO4 batteries provide about 2-3 times more energy storage capacity per unit weight.

Cycle Life
While lead-acid batteries last around 300-500 cycles, LiFePO4 batteries can endure 2000 cycles or more.

Efficiency
LiFePO4 batteries can achieve charge/discharge efficiencies of around 95-99%, whereas lead-acid batteries have lower efficiencies, around 70-85%.

Self-Discharge Rate
Lead-acid batteries can self-discharge at a rate of 3-20% per month, while LiFePO4 batteries self-discharge at a rate of 1%-3% per month.

Weight
A LiFePO4 battery with the same capacity as a lead-acid battery can weigh around 50-70% less.

Size and Form Factor
LiFePO4 batteries have a smaller size and can be designed in various form factors, making them more flexible for different applications compared to lead-acid batteries.

Environmental Impact
LiFePO4 batteries are free from hazardous heavy metals like lead and cadmium, which are present in lead-acid batteries. LiFePO4 batteries are also recyclable and have a lower overall carbon footprint.

Cost
Initially, lead-acid batteries are typically less expensive than LiFePO4 batteries. However, when considering the longer lifespan and superior performance of LiFePO4 batteries, they are more cost-effective.

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Mastering the 12V LiFePO4 Battery: A Step-by-Step Guide

What Is 12V LiFePO4 Battery?: A LiFePO4 battery, also known as an LFP battery or Lithium Iron Phosphate battery, is a type of rechargeable lithium-ion battery. It is widely used in various applications, including electric vehicles (EVs), renewable energy storage systems, portable electronics, and more.

LiFePO4 batteries are known for their high energy density, long cycle life, and improved safety compared to other lithium-ion battery chemistries. They are composed of a lithium iron phosphate cathode (LiFePO4) and a carbon anode.

Here are some key characteristics and advantages of LiFePO4 batteries:

Safety: LiFePO4 batteries are considered safer than other lithium-ion batteries because they have a more stable chemical structure and are less prone to thermal runaway or explosion.

High cycle life: LiFePO4 batteries can endure a large number of charge-discharge cycles without significant capacity degradation. They typically have a cycle life ranging from 2,000 to 5,000 cycles.

Good temperature tolerance: LiFePO4 batteries perform well over a wide temperature range, making them suitable for both hot and cold environments. They exhibit better performance than other lithium-ion chemistries in extreme temperatures.

High energy density: Although LiFePO4 batteries generally have a lower energy density compared to some other lithium-ion batteries, they still offer a respectable energy storage capability. The energy density has been improving over time with advancements in battery technology.

Fast charging: LiFePO4 batteries can be charged at relatively high rates, allowing for faster charging times compared to other lithium-ion chemistries. Rapid charging capabilities make them suitable for applications where quick charging is necessary.

Environmental friendliness: LiFePO4 batteries are more environmentally friendly than certain other lithium-ion batteries because they don't contain toxic heavy metals such as cobalt. The materials used in LiFePO4 batteries are abundant and easily recyclable.

How To Choose A BMS For LiFePO4 Cells?: The following are some key points to remember when selecting a BMS:

Voltage compatibility: For example, a 12V LiFePO4 battery should be selected for a BMS rated at 12V.

Current rating: Ensure that the current rating of the BMS exceeds the maximum discharge and charge current requirements of the battery to avoid overloading or overheating.

Balancing function: LiFePO4 batteries benefit from regular cell balancing to ensure that each cell in the pack is charged and discharged evenly. A BMS with a balancing function can help to balance the voltage of the cells and extend the overall life of the battery pack.

Protection features: Look for a BMS that offers comprehensive protection features including overcharge protection, overdischarge protection, overcurrent protection and short circuit protection.

Communication and monitoring: Confirm whether you need the communication capability and monitoring features of a BMS. Some BMS models offer communication protocols such as CAN bus, RS485 or SMBus, allowing you to monitor battery status, voltage, temperature and other parameters in real time.

Size and form factor: Ensure that the physical size and form factor of the BMS matches the design of your battery pack.

KET does not recommend individuals to go for DIY LiFePO4 battery packs. This is because battery packs made by non-professionals can be a high safety risk anyway. If you are looking for a reliable LiFePO4 battery pack manufacturer, then you should consider KET. We are a professional LiFePO4 battery solution provider, including battery pack assembly, BMS design, etc. KET can provide you with a one-stop LiFePO4 battery pack customisation service.

Is Lithium Ion The Same as LiFePO4?: The two are not the same. To be more precise, LiFePO4 batteries are a type of lithium-ion battery. Lithium-ion batteries can be divided into LiCoO2 batteries, LiMn2O4 batteries, LiNiMnCoO2 batteries, LiFePO4 batteries and so on, depending on the chemical composition of the positive and negative electrodes.

LiFePO4 batteries have advantages over other lithium-ion batteries in terms of longer cycle life, higher discharge current, lower risk of overheating, and more environmentally friendly materials (no cobalt).

How To Top Balance LiFePO4?: To top balance LiFePO4 cells, you will need a DC power supply with adjustable voltage and current limit, a multimeter or voltmeter to measure cell voltage, a set of wires and connectors to connect the power supply to the cells, and a suitable charger for your battery pack (optional).

The steps for top balancing LiFePO4 cells involve charging the battery pack until it reaches about 95% SOC, setting the DC power supply to 3.6V and a low current limit, connecting the power supply to the cells, monitoring the cell voltage until all cells reach 3.6V, and disconnecting the power supply from the pack.

Some tips for top balancing LiFePO4 cells include not leaving cells unattended, not exceeding 3.65V per cell, not top balancing too frequently or for too long, and using a BMS for your pack to monitor and protect your cells during use. Proper safety precautions and guidelines should be followed when handling batteries and electrical equipment.

Do 12V LiFePO4 Batteries Need A Special Charger？: The short answer is YES. LiFePO4 batteries have specific charging requirements, so you need to use a charger specifically designed for LiFePO4 batteries. Here are a few reasons why:

Voltage Accuracy: LiFePO4 batteries have a different voltage profile compared to other lithium-ion battery types. They have a nominal voltage of 3.2 volts per cell (compared to 3.7 volts for most other lithium-ion batteries). LiFePO4 batteries require a charger that accurately regulates the charging voltage to prevent overcharging or undercharging.

Charging Algorithm: LiFePO4 batteries require a specific charging algorithm to ensure optimal performance and longevity. A charger designed for LiFePO4 batteries will have the appropriate charging profile, including the correct charging voltage, current, and charging stages (such as bulk, absorption, and float charging) tailored to LiFePO4 chemistry.

Safety Features: LiFePO4 batteries are known for their excellent safety characteristics, but using a charger specifically designed for LiFePO4 batteries can further enhance safety. These chargers often incorporate safety features such as overcharge protection, short-circuit protection, and temperature monitoring to prevent any potential issues during the charging process.

What iIs Charge Voltage for 12V LiFePO4 Battery?: This answer will vary slightly from manufacturer to manufacturer, due to different battery pack designs. Here KET gives the recommended charging voltage for LiFePO4 batteries as 3.5 to 3.65 volts per cell. The following are the charging voltages at 4 different battery packs:

12 volt LiFePO4 battery packs (4 in series): charging voltage of approximately 14 to 14.6 volts.
24 volt LiFePO4 battery packs (8 in series): charging voltage of approximately 28 to 29.2 volts.
36 volt LiFePO4 battery pack (12 in series): charging voltage approx. 42 to 43.8 volts.
48 volt LiFePO4 battery pack (16 in series): charging voltage of approx. 56 to 58.4 volts.

How Fast Can You Charge LiFePO4?: The charging rate or rate of a LiFePO4 battery is usually expressed as "C" or "C-rate". the C-rate represents the charging or discharging current relative to the capacity of the battery. Example: For a LiFePO4 battery with a capacity of 40Ah, a charge rate of 1C would be equivalent to a charge current of 40A, and a charge rate of 0.5C would be equivalent to a charge current of 20A.

In order to ensure the best performance and lifespan of LiFePO4, KET recommends a maximum C rate of 1C. There are some manufacturers on the market that will achieve higher C rates (2C-3C). However, too high a charge C-rate can easily cause problems with high temperatures, so KET recommends that packs with high charge C-rates are equipped with a BMS with temperature monitoring, which can significantly reduce the risk of use.

If you have further functional requirements or would like to learn more about LiFePO4 batteries, you can also contact us. As a professional (LiFePO4) lithium iron phosphate battery supplier, KET's team of engineers has sufficient experience in battery pack design and development.

Are LiFePO4 12V Batteries Safer than Lithium-ion Batteries?: Yes, LiFePO4 batteries are safer than other types of lithium-ion batteries （such as LiCoO2, LiMn2O4, NCM）. Here are a few reasons why:

Thermal stability: LiFePO4 batteries have excellent thermal stability than other lithium-ion chemistries. They are more resistant to overheating and are less prone to thermal runaway.

Lower risk of thermal runaway: The phosphate-based chemistry makes LiFePO4 batteries less likely to undergo thermal runaway even under abusive conditions like overcharging, short-circuiting, or physical damage.

Reduced flammability: LiFePO4 batteries have a higher thermal ignition threshold than other lithium-ion chemistries.

Environmentally friendly: LiFePO4 batteries contain non-toxic materials and do not contain heavy metals such as lead, cadmium, or mercury. They are more environmentally friendly and safer to dispose of than other types of lithium-ion batteries.

What Is The Difference: Cylindrical Vs Prismatic LiFePO4 Cells?: Cylindrical LiFePO4 Cells:

Design: Cylindrical LiFePO4 cells have a cylindrical shape and are typically available in standardized sizes, such as 18650 or 26650.

Advantages:
Robust construction: Cylindrical cells have a sturdy design and are less prone to physical damage.
Good heat dissipation: The cylindrical shape allows for efficient heat dissipation, which can enhance safety and longevity.
Widely available: Cylindrical cells are commonly used in various applications and are readily available in the market.
Disadvantages:
Less flexible in pack design: Their cylindrical shape limits design flexibility when arranging multiple cells within a battery pack.

Prismatic LiFePO4 Cells:

Design: Prismatic LiFePO4 cells have a rectangular or square shape, resembling a thin box. They are made of stacked layers of cathode, anode, and separator materials.

Advantages:
Flexible pack design: Their flat shape and compact design make prismatic cells more adaptable to different pack designs, allowing for efficient use of space.
Disadvantages:
Slightly lower durability: Prismatic cells can be more susceptible to physical damage due to their flat and thin design.
Limited availability: Prismatic cells are not as widely available as cylindrical cells and are less common in the market.

Who Makes LFP Batteries?: LiFePO4 (LFP) batteries are produced by various manufacturers around the world. Some well-known companies involved in the production of LiFePO4 batteries include:KET, CATL, BYD, Panasonic, LG Chem, Winston Battery, CALB, Samsung, etc.

The LiFePO4 battery industry has a very rapid development from 2022. During this period, numerous outstanding LiFePO4 battery manufacturers were born. This has also driven the industry to scale up and thus achieve the goal of reducing LiFePO4.

How to Charge LiFePO4 Battery?: The most important thing is to choose a charger that is compatible with this LiFePO4 battery.

Some people will consider using other types of Li-ion battery chargers, but this approach is not advisable. This is because these chargers are usually designed for higher voltages than required for LiFePO4 batteries.

KET's LiFePO4 battery bms have features to prevent overcurrent, overcharge, overdischarge, and short circuit. Generally can be used with confidence. However if any abnormalities are found, such as overheating, smoke or swelling, charging should be stopped immediately.

How To Make LiFePO4 Battery Pack?: KET does not encourage individuals to DIY battery packs, unless you know professional electrical engineering knowledge. Here are a few steps needed to build a LiFePO4 battery pack in KET factory:

Cell Preparation: LiFePO4 cells are subjected to quality control checks. This includes verifying the voltage, capacity and internal resistance of the cells.

Sorting and grading: The cells are sorted and graded according to their capacity and internal resistance. This ensures that cells with similar properties are grouped together.

Cell Grouping: Cells with similar characteristics are grouped and connected in series or parallel to form battery modules.

Module Assembly: After grouping, cells are connected, usually by an automatic spot welder.

Battery Management System (BMS) Integration: The BMS, including protection circuitry and monitoring electronics, is integrated into the battery pack, and the BMS ensures the safe operation of the pack by managing cell balancing, temperature monitoring, and preventing overcharge and overdischarge.

Enclosure and Insulation: Semi-finished battery packs will have insulation added to prevent electrical shorts. The battery pack will then be housed in a suitable enclosure (commonly plastic enclosure, pvc, sheet metal housing).

Testing and Quality Control: Assembled battery packs are subjected to rigorous testing, including capacity testing, cycle life testing, safety testing and electrical characteristics testing to ensure they meet requirements.

What Is The Difference: LFP VS NCA Battery?: lithium-ion batteries with distinct characteristics. Here are some key differences between LFP and NCA batteries:

Chemistry and Voltage: LFP batteries use a lithium iron phosphate (LiFePO4) cathode, while NCA batteries use a lithium nickel cobalt aluminum oxide (LiNiCoAlO2) cathode. LFP batteries typically have a lower voltage (around 3.2 volts per cell), while NCA batteries have a higher voltage (around 3.7 volts per cell).

Safety: LFP batteries are safer than NCA batteries. LFP batteries have a more stable chemical structure and are less prone to thermal runaway or combustion.

Energy Density: LFP battery tgypically ranges from 120 to 160 Wh/kg.NCA battery generally has a higher energy density, ranging from 200 to 250 Wh/kg.

Cycle Life: LFP batteries can endure a large number of charge-discharge cycles without significant capacity degradation, usually ranging over 2,000 cycles or more. NCA batteries have a shorter cycle life, typically ranging from 500 to 1,000 cycles.

Thermal Stability: LFP batteries have better thermal stability compared to NCA batteries. They are less sensitive to high temperatures, reducing the risk of thermal runaway or damage due to overheating.

Application Focus: LFP batteries are commonly used in applications that prioritize safety, longevity, and reliability, such as energy storage systems, backup power systems, and some electric vehicles. NCA batteries are often used in applications that require high energy density, such as electric vehicles with longer driving ranges.

What Is The LFP Battery Lifespan?: The life of an LFP (Lithium iron phosphate) battery can be measured in terms of cycle life and calendar life.

Cycle life: Cycle life refers to the number of charge and discharge cycles a battery has undergone. LiFePO4 batteries typically have a high cycle life, usually above 2000 cycles.

Calendar life: Calendar life refers to the battery life based on time, independent of the charge/discharge cycle times. LFP batteries typically have a calendar life of 8 years or more.

Of course the above figures are not absolute values and LFP battery life can vary based on several factors, including:

1. Depth of Discharge (DOD): Operating the LFP battery at a lower depth of discharge, such as keeping it at 20-80% of charge, can help extend its life compared to periodic deep discharges.
2. Temperature: High temperatures can accelerate the aging process and reduce the life of LFP batteries.
3. Charge and Discharge Rates: Extremely high or low rates can affect the performance and life of the battery.
4. Care and Maintenance: Avoiding overcharging or overdischarging and ensuring adequate ventilation can help extend the life of LFP batteries.

What Is The 12V LiFePO4 Battery's Nominal Voltage?: Nominal voltage of Lithium iron phosphate batteries (LiFePO4) are 3.2 volts per cell. LiFePO4 batteries are commonly used in a variety of applications including electric vehicles, renewable energy storage systems and portable electronics. The nominal voltage of a LiFePO4 pack is determined by the number of cells connected in series. Examples are as follows:

1. A 12 volt battery pack consisting of four LiFePO4 cells connected in series has a rated voltage of 3.2V*4, or 12.8V
2. A 24 volt battery pack consisting of 8 LiFePO4 cells in series has a rated voltage of 3.2V*8, or 25.6V
3. A 36 volt battery pack consisting of 12 LiFePO4 cells in series has a rated voltage of 3.2V*12, or 38.4V
4. A 48 volt battery pack consisting of 16 LiFePO4 cells in series has a rated voltage of 3.2V*16, or 51.2V

By analogy, you can deduce the nominal voltage of other battery packs.

What iIs The LiFePO4 Theoretical Capacity?: LiFePO4 has a theoretical capacity of 170 mAh/g.

Is It OK to Charge 12V LiFePO4 Battery to 100%?: The answer is YES. It is safe to charge lithium iron phosphate (LiFePO4) batteries to 100% capacity. LiFePO4 batteries have high inherent stability, so they have a low risk of overheating or experiencing a thermal runaway event when charged to full capacity.

However, if you are looking to store LiFePO4 batteries for a long period of time, KET would strongly recommend that you do not keep LiFePO4 batteries at 100% capacity. This will reduce its overall lifetime. As a 12v LiFePO4 lithium battery supplier with many years of development and manufacturing experience, KET recommends storing LiFePO4 batteries at 50% state of charge (SoC) for long periods of time to optimize their lifespan. You only need to charge the battery to 50% charge once every 3-6 months. The benefit of this is that you can maximize the lifespan of the LiFePO4 battery.

What Are The 12V LiFePO4 Battery's Charge & Discharge Curves?

Below are the discharge curves shown by KET engineers at different temperatures with a 12V LiFePO4 battery pack at a discharge rate of 1C.