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Three-stage charging of lead-acid battery

Apr , 15 2023

1. What is the three-stage charging of lead-acid batteries? The charging method of lead-acid batteries should be divided into three stages, namely: constant current charging - constant voltage charging - trickle charging. Constant current charging stage: charge to 13.4V with 0.2C10 A current. Constant voltage charging stage: 2.4V/cell, charging time 3h, cut-off current 0.02C10A Trickle charge phas...

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Charge and discharge theory and calculation method design of lithium battery

May , 13 2023

1 . Production of lithium Ion battery 1 .1 State Of Charge ( state-of-charge; S OC) Soc can be defined as the state of available electrical energy in the battery, usually expressed as a percentage. Because the available electric energy varies with charging and discharging current, temperature, and aging phenomenon, the definition Of the State of Charge is also divided into two types: Absolute stat...

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Negative electrode formula for high temperature performance of lead-acid battery

Jun , 07 2023

Negative electrode formulation for high-temperature performance of lead-acid batteries (containing the first hydrogen evolution inhibitor Bi2O2CO3 and the second hydrogen evolution inhibitor ZnO). The basic formula of the negative electrode (number of weight) is: 100 parts lead powder, 8 ~ 11 parts dilute sulfuric acid, 9 ~ 13 parts deionized water, 0.06 ~ 0.14 parts short fiber, 0.10 ~ 0.20 parts...

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Self-discharge measurement of lithium batteries: resting and dynamic measurement methods

Jun , 14 2023

The measurement methods of self-discharge of lithium-ion batteries are mainly divided into two categories: 1) static measurement method, which obtains the self-discharge rate by standing the battery for a long time; 2) Dynamic measurement method to realize the parameter identification of the battery in the dynamic process. Static measurement method At present, the mainstream self-discharge measure...

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Fault Analysis and Handling Methods of DC Screen High Frequency Switching Power Supply Module

Jul , 20 2023

Ⅰ、Protection of high-frequency power module 1）. High frequency power module AC input overvoltage, undervoltage, and overheating will cause charging module protection. Please confirm according to the fault code; 2）. The cabinet is equipped with glass doors or is airtight, which may cause overheating protection of high-frequency modules; 3）. If the ambient temperature in the computer room is too hig...

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Explanation of power terms related to UPS power supply

Jul , 28 2023

Transient recovery time: The time required for the output voltage to recover to the specified range when the load suddenly changes (0-100%, 100% -0%), usually in milliseconds (ms). Filter: A device used to eliminate noise, filtering the input or output to obtain pure alternating current. Shielding: A means of isolating and blocking electromagnetic radiation using physical principles...

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The Role of AC Capacitors in High Speed Circuits

Aug , 18 2023

1、Introduction For low-frequency circuits, resistors and capacitors can be analyzed as ideal devices. However, in high-frequency circuits, these two devices will not be "ideal". Today, our main discussion is about the issue of AC capacitors, which are commonly known as AC coupling capacitors. Their main function is to filter out the DC component of the signal, which is symmetrical about the X-axis...

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UPS power supply power supply method and daily use precautions

Aug , 29 2023

Today, whether it is a computer room or a data center, UPS power supply has played a vital position. When the UPS power supply is power supply in the municipal power, it is the role of the voltage regulator and filter to ensure the normal operation of the equipment; when the municipal power is interrupted, it can provide it by providing its DC power supply part (battery pack, diesel generator, etc...

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Working principle of lead-acid battery

Dec , 23 2023

1. The generation of electromotive force of lead-acid batteries After the lead-acid battery is charged, the positive plate lead dioxide (PbO2), under the action of water molecules in the sulfuric acid solution, a small amount of lead dioxide and water produce dissociable unstable substances - lead hydroxide (Pb (OH) 4), hydroxide ions in the solution, lead ions (Pb4) remain on the positive plate, ...

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Explanation of the control method of high-frequency switching power supply, with good dynamic performance

Dec , 23 2023

High frequency switching power supply is a widely used power supply device in various electronic devices, and its high efficiency and stability make it an indispensable part in many fields. Its core feature is the use of switching devices to convert the input DC voltage or current into high-frequency AC power, and then obtain stable DC output through rectification and filtering. Due to its high ef...

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Adaptability of different types of UPS power supplies to data center requirements

Feb , 23 2024

From the perspective of data center requirements, the best UPS should have the characteristics of elastic expansion, high availability, efficiency, high density, and intelligence. According to this standard, a comparison is made between the power frequency UPS, high frequency UPS and modular UPS commonly used in data centers. Adaptability table of different types of UPS to data center requirements...

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Can online high-frequency UPS work without batteries, as backup batteries during power outages

Mar , 21 2024

UPS can maintain the time to connect devices without mains power, providing additional time for data storage and orderly shutdown of programs. Can online UPS work without batteries No, online UPS (uninterruptible power supply) cannot function without a battery. The battery is a key component of an online UPS system, and its main function is to provide continuous and stable power supply to connecte...

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