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How To Betect The Quality Of Lithium-ion Batteries?

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Batteries play a vital role in our lives. They are used to store electricity and power various electrical appliances. Especially lithium-ion batteries, they are used in a wide range and are often used in some small portable appliances, such as mobile phones. The battery is a consumable material, and it is often charged and discharged. No matter the battery is the best, it has a certain lifespan, and the price of lithium-ion batteries is higher than other batteries, so try to choose good quality lithium-ion batteries when buying, and the service life can be longer , Then how do we detect the quality of lithium-ion batteries?

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How to detect the quality of lithium-ion batteries:

1. The fastest inspection method is to test the internal resistance and maximum discharge current. A good quality lithium ion battery has very small internal resistance and large maximum discharge current. Use a multimeter with a 20A range to directly short-circuit the two electrodes of the lithium-ion battery. The current should generally be about 10A, or even higher, and it can be maintained for a period of time. A relatively stable battery is a good battery.

2. Look at the appearance. The fullness of the appearance, such as a lithium-ion battery of about 2000mAh, is relatively large. The workmanship is fine or the packaging is fullness.

3. Look at the hardness. The middle part of the lithium-ion battery can be squeezed gently or moderately by hand. The hardness is moderate, and there is no soft squeezing feeling, which proves that the lithium battery is a relatively high-quality battery.

4. Look at the weight. Remove the outer packaging and feel whether the weight of the battery is heavy. If it is heavy, it is a high-quality battery.

5. During the live working process of the lithium-ion battery, if the two poles of the battery are not hot after continuous discharge for about 10 minutes, it proves that the battery protection board system is perfect. Generally, the quality of lithium-ion batteries with high-quality protection boards is better than ordinary lithium-ion batteries.

The service life of a good-quality lithium-ion battery is about two or three years. The non-durable performance of a lithium-ion battery is that the power consumption is very fast, and the charging time is reduced accordingly. In order to ensure the long-lasting use of lithium-ion batteries, pay attention to the protection of lithium-ion batteries, such as new batteries. Generally, the first three charges must be charged for 12 hours to activate the battery. Normally, you should also pay attention to it. There will always be a blind spot, which is to charge the mobile phone when it is completely dead. This idea is wrong. In order to protect the lithium-ion battery, try to charge the battery with half of the battery.

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How Can LiFePO4 Batteries Be Used To Replace Lead-acid?

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Most energy storage systems, like UPS and solar energy storage, use lead-acid batteries,  but more and more people are coming to use lithium iron phosphate batteries (LiFePO4) instead.

How does LiFePO4 replace Lead-acid batteries?

LiFePO4 batteries are compatible with lead-acid-battery equipment all the while having a higher discharge platform, volumetric specific capacity, and cycle life.

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12.8V 7Ah Lead-acid battery

The nominal voltage of each cell of a lead-acid battery is 2.1V while the LiFePO4 is 3.2V.

To connect cells in series to form a 12V battery pack, lithium iron phosphate only needs 4 cells (3.2V x 4 = 12.8V) compared to the 6 cells of a lead-acid battery (2.1V x 6 = 12.6V).  Already based on this knowledge, it is clear that lithium iron phosphate batteries are more advantageous than lead-acid batteries in terms of energy ratio, weight, and volume.

12V-7Ah Lithium Battery

12.8V 7Ah Himax LiFePO4 modular battery

Each LiFePO4 Modular 12.8V battery can be set up in parallel or series in order to meet the needs of your current set up. For example, for a 48V setup, 4 cells of 12V should be hooked up in series. Simply remove the Lead-Acid Batteries and replace them with the Lithium iron phosphate Batteries and attach cables and secure the holding bracket.

Limitation of Lead-acid batteries

The charging efficiency of Lead-acid batteries is relatively low at 70% whereas the charging efficiency of LiFePo4 batteries can exceed 80% or even 90%. A lead-acid battery needs more energy for recharging, so a lot of energy is lost during the charging process.

Some other features of lead-acid batteries are as follows:

  • Fast or partial charges ruin a lead-acid battery
  • Charging times are long from 6 to 8 hours
  • An incorrect charger or setting reduces battery life
  • Poor maintenance will also reduce battery life

Other benefits of Lead-acid replacement batteries

Consistent voltage for a longer time

No more flickering lights or spotty performance. Lead-acid batteries can be unreliable for powering accessories at 50% or lower whereas Himax 12.8V LiFePO4 Lead-acid replacement batteries provide a constant output of energy all the way down to as little as 5% of its power.

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Fast Charging

Lithium-ion batteries can be “fast” charged to 100% of their capacity. Normally, the LiFePo4 battery can be charged to 50% of its capacity in only 30 minutes. However, the Grepow lithium batteries with fast-charging technology can reach 100% of its capacity within 30 minutes; the maximum charging efficiency can go up to 3C for the charging rate.

Smart and Multi-connected battery

LiFePO4 batteries are equipped with a Battery Management System (BMS) board, and you can check on the State of Charge (SOC). More importantly, the 12.8V modular LiFePo4 battery allows for multiple connections, so you can connect batteries in series and parallel without an external BMS (max 4S10P; the maximum parameter is 51.2V and 70Ah). You can also assemble the battery into different structures and shapes to fit it into the available space of your device.