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angela piorter

May 11, 2024 - 6:02 AM

Reasons for voltage drop after lead-acid batteries are fully charged

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May 10, 2024 - 3:33 AM

There are various reasons for the voltage drop of lead-acid batteries after being fully charged, and these reasons cover a variety of aspects such as changes in the internal chemical reaction of the battery, the aging of the battery structure, and the conditions of use. First of all, sulfation is one of the important reasons. Long-term undercharging or over-discharging may lead to internal battery sulfation, i.e., the overgrowth of lead sulfate crystals on the negative plate. This overgrowth of lead sulfate crystals increases the internal resistance of the battery, resulting in a voltage drop. Sulfation is a common phenomenon during battery use, especially if charging is not timely after discharge. Secondly, plate grid corrosion is also a cause of voltage drop. Plate grid corrosion is the process of dissolving the material of lead on the negative plate into the electrolyte in lead-acid batteries.

The phenomenon of lead-acid battery voltage dropping fast when the battery is fully charged and left unused may be caused by a variety of factors, including self-discharge of the battery, chemical and physical changes within the battery, and environmental conditions. The following is a detailed analysis of this phenomenon.
The charging and discharging process of lead-acid batteries involves complex electrochemical reactions. When charging, the positive plate (anode) is converted from lead dioxide to lead sulfate, and the negative plate (cathode) is converted from spongy lead to lead sulfate as well. When discharged, these reactions are reversed, and the lead sulfate is again converted to lead dioxide and spongy lead.

[Self-discharge phenomenon]
1. Self-discharge : All batteries undergo self-discharge, i.e., even if the battery is not connected to any load, its charge will naturally decrease over time. The self-discharge of lead-acid batteries is usually more significant than that of other types of batteries, such as lithium batteries.
2. Chemical reaction: The self-discharge of lead-acid battery is partly caused by the internal chemical reaction, even if the battery is not working, the active substances on the positive and negative plates will react with the sulfuric acid in the electrolyte.
3. Evaporation of electrolyte: Evaporation of electrolyte can also lead to self-discharge, because the concentration of electrolyte will change after water evaporation, which will affect the voltage of the battery.

This corrosion leads to the loss of active material, which reduces the capacity and voltage of the battery. With the growth of battery use time, the degree of plate grid corrosion will gradually increase, resulting in a faster rate of voltage drop. In addition, active substance shedding also affects the voltage. With the charging and discharging cycles, the active material on the positive and negative plates may gradually fall off. This shedding reduces the capacity of the battery, which in turn affects the voltage. The speed and degree of shedding of active material is related to the battery’s operating conditions, charging and discharging methods and other factors. In addition to the above internal factors, external factors may also lead to a drop in voltage after the lead-acid battery is fully charged. For example, the impurity content of a new battery exceeds the standard may affect the performance of the battery. https://www.accord-power.com/products/lead-acid-battery/
The content of lead in the raw material of pole plate, the pollution in the production process, the quality of electrolyte and the dust, lead particles and lead slag in the assembly process may affect the performance and voltage of the battery. In addition, internal leakage, wet electrolyte between the poles of the battery, external leakage and the old battery aging serious, very small capacity, no storage and other factors may also lead to voltage drop. To summarize, there are various reasons for voltage drop after lead-acid battery is fully charged, and it is necessary to comprehensively consider the internal structure of the battery, the chemical reaction, the use of conditions and external factors and other aspects. In order to reduce the speed and degree of voltage drop, it is necessary to take appropriate charging and discharging methods, regular maintenance of the battery, avoid overcharging and over-discharging and other measures.

Is a lithium phosphate battery a blade battery?

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May 10, 2024 - 3:32 AM

Lithium phosphate batteries are related to blade batteries in nature, but they are not exactly equivalent. Lithium phosphate batteries, or LFP batteries for short, are a kind of secondary batteries, which use lithium iron phosphate and graphite as the main positive and negative materials, and organic solvents and salts as the electrolyte. This type of battery is characterized by high energy density, long life, better safety performance and environmental protection. The energy density of lithium phosphate battery reaches more than 200Wh/kg, and its service life can reach more than 2,000 times, which can meet the needs of long-term use. In addition, compared with other lithium-ion batteries, lithium phosphate batteries are less likely to be overcharged or short-circuited during charging, providing better safety. The blade battery, on the other hand, is a new type of battery product released by BYD in 2020.

Lithium iron phosphate batteries and blade batteries are two related but different concepts. A lithium iron phosphate battery is a type of lithium ion battery that uses lithium iron phosphate as the cathode material, while a blade battery is a battery product developed by BYD that utilizes lithium iron phosphate technology and has a different design and structure than the traditional lithium iron phosphate battery.

Lithium iron phosphate battery
Lithium iron phosphate batteries are favored by the market due to their good thermal stability, long life and cost-effectiveness. They usually have a high level of safety because the lithium iron phosphate material is more stable at high temperatures and has a lower risk of thermal runaway. In addition, Li-FePO4 batteries have a longer lifespan, can withstand more charge/discharge cycles, and have a relatively low cost, properties that make them very popular in many applications.

Blade Battery https://www.accord-power.com
Blade batteries are a new battery technology introduced by BYD, based on lithium iron phosphate battery technology. Blade batteries are designed with long, strip-shaped cells, a design that helps to improve the space utilization of the battery pack, thereby increasing the energy density of the battery. Compared to traditional lithium iron phosphate batteries, blade batteries offer a significant increase in volumetric energy density, which is particularly important for electric vehicles as they can provide longer range.

The battery adopts lithium iron phosphate technology and is characterized by super safety, super strength, super range and super life. Through structural innovation, the blade battery can skip the "module" when forming a group, which greatly improves the volume utilization rate, and ultimately achieves the design goal of loading more cells in the same space. In addition, the blade battery also passed the "Mount Everest" in the field of battery safety testing - pin prick test, and successfully challenged the extreme strength test - 46 tons of heavy truck crushing test, proving its superior performance. This proves its superior performance. In terms of their definitions and characteristics, lithium phosphate batteries and blade batteries both use lithium iron phosphate technology, so they have certain similarities. However, the blade battery is not simply a lithium phosphate battery, but through the innovation and optimization of the battery structure, to achieve higher energy density and better performance. In addition, blade batteries have undergone rigorous testing and validation, proving their superiority in terms of safety, strength, range and life. Therefore, although both lithium phosphate and blade batteries utilize lithium iron phosphate technology, there are some differences between them in terms of structure, performance and application. Blade batteries are a new type of battery product based on BYD’s innovation and optimization of lithium iron phosphate technology, with higher energy density and better performance.

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How to see Ups lead acid battery life

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Apr 24, 2024 - 6:13 AM

The lifespan of UPS (Uninterruptible Power Supply) lead-acid batteries is a key factor in ensuring a stable supply of power, so it is vital to understand their lifespan. Here are some methods and steps to help you check the service life of UPS lead-acid batteries:

First, understand the basic parameters of the battery

First of all, to view the service life of UPS lead-acid batteries, you need to understand its basic parameters, such as the rated capacity of the battery, voltage, charge and discharge times. These parameters can usually be found on the battery label or manual. By understanding these parameters, you can initially judge the battery life condition.

Second, check the appearance of the battery

Battery appearance is a visual basis for judging its service life. Regularly check whether the shell of the UPS lead-acid battery has deformation, swelling, liquid leakage and other phenomena. If these abnormalities are found, the battery may have been damaged internally and need to be replaced in a timely manner.

Third, measure the battery voltage and internal resistance

Use a multimeter and other tools to measure the UPS lead-acid battery voltage and internal resistance. Battery voltage should be kept within the normal range, if the voltage is too low or too high, may affect the service life of the battery. At the same time, the internal resistance is also an important indicator to reflect the performance of the battery, the increase in internal resistance may mean that the battery life is shortened.

Fourth, the use of professional battery monitoring tools

Some advanced UPS equipment is equipped with a battery monitoring function, which can monitor the health status of the battery in real time, the remaining capacity and other information. Through these tools, you can more accurately understand the performance and service life of the battery.

Fifth, record the battery use time and the number of times of charging and discharging

UPS lead-acid battery life is closely related to its use time and the number of times it is charged and discharged. Therefore, record the battery use time and the number of times of charging and discharging, to help determine the battery life condition. If the battery use time is too long or too many times of charging and discharging, may need to consider replacing the battery.

Six, pay attention to the environmental impact

Ambient temperature has a great impact on the service life of UPS lead-acid batteries. Too high a temperature will accelerate battery aging and shorten the service life; while too low a temperature may lead to undercharging of the battery. Therefore, make sure that UPS equipment and batteries are stored in a suitable temperature environment to extend the service life of the battery.

Seven, consider the maintenance factors

The maintenance of the battery will also affect its service life. Regular maintenance of UPS lead-acid batteries, such as cleaning the surface of the battery, checking the electrolyte level, etc., can maintain the good performance of the battery and extend its service life.

Eight, refer to the manufacturer’s recommendations

The service life of UPS lead-acid batteries may vary for different brands and models. Therefore, refer to the recommendations and instructions provided by the manufacturer, you can more accurately understand the service life of the battery. Manufacturers usually provide advice on battery replacement cycles, maintenance methods and other aspects.

Accord Battery experts caution us that checking the service life of UPS lead-acid batteries requires comprehensive consideration of many aspects, including the basic parameters of the battery, its appearance, voltage and internal resistance, the time of use and the number of times it has been charged and discharged, the impact of the environment, and the maintenance situation. Through comprehensive analysis and judgement, you can more accurately understand the service life of the battery, and take timely measures to ensure the stable operation of UPS equipment.
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At the same time, in order to extend the service life of UPS lead-acid batteries, it is recommended that the battery be regularly maintained and serviced to avoid excessive discharge and charging, and to maintain a suitable environment for use. In addition, when choosing UPS equipment and batteries, you should choose products with reliable brands and stable performance to ensure a stable supply of power and long-term stable operation of the equipment.

Of course, for non-professionals, checking the service life of UPS lead-acid batteries may be difficult. Therefore, in practice, it is recommended to consult professional UPS equipment maintenance personnel or manufacturers’ technical support for more accurate and professional advice.
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