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Guide to the use of electric vehicles in winter, how to make lithium-ion batteries active?

Monday, December 27, 2021 11:58:14 PM America/Los_Angeles

With the transformation of automobile electrification, consumers' acceptance of pure electric vehicles has gradually increased, and pure electric vehicles on the market have become more and more popular, but at the same time, the shortcomings of pure electric vehicles have also been exposed.

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Introduction of common cylindrical lithium-ion battery models

Wednesday, December 1, 2021 7:27:00 PM America/Los_Angeles

Cylindrical lithium-ion batteries are usually represented by five digits. Counting from the left, the first and second digits are the diameter of the battery, the third and fourth digits are the height of the battery, and the fifth digit represents the cylindrical shape. There are many types of cylindrical lithium batteries, the more common ones are 10400, 14500, 16340, 18650, 21700, 26650, 32650 and so on.

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The difference between cylindrical lithium battery and square lithium battery

Sunday, November 7, 2021 10:39:16 PM America/Los_Angeles

Cylindrical lithium batteries are divided into different systems such as lithium iron phosphate, lithium cobalt oxide, lithium manganate, cobalt-manganese hybrid, and ternary materials. The outer shell is divided into two types: steel shell and polymer. Different material systems have different advantages. At present, cylindrical batteries are mainly steel cylindrical lithium iron phosphate batteries, which are characterized by high capacity, high output voltage, good charge-discharge cycle performance, stable output voltage, large discharge current, stable electrochemical performance, safe use, and wide operating temperature range. Environmental protection, widely used in solar lights, lawn lights, backup energy, power tools, toy models.

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How to calculate the capacity of lithium ion polymer battery ?

Thursday, October 21, 2021 11:09:11 PM America/Los_Angeles

The size of the lithium ion polymer battery is directly related to the battery capacity. The formula for calculating the capacity of a lithium ion polymer battery is: capacity (AH) = constant discharge current (A) × discharge time (H). The battery on the mobile power supply usually uses a  lithium polymer battery. The choice of lithium polymer battery mainly has several indicators to meet the demand. The main factors are high safety, many charge and discharge times, long life and large capacity. Next, let us take a closer look at how to calculate the capacity of lithium-ion polymer batteries.

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Lithium battery KC certification and KC certification process

Thursday, November 12, 2020 10:16:29 PM America/Los_Angeles

KC certification is a national unified certification mark implemented by the Korean National Standards Committee. Lithium batteries are included in the KC certification catalog as a compulsory certification product. At present, the testing of portable secondary lithium battery packs and lithium batteries must be performed by authorized laboratories in South Korea, and cannot be transferred with the CB report of IEC 62133. After the product has passed the evaluation, it will be issued a Confirmation Letter of Declaration valid for 5 years, during which no factory inspection is required.

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What is the cause of excessive self-discharge of lithium-ion batteries?

Thursday, October 29, 2020 1:47:28 AM America/Los_Angeles

There are two reasons for the excessive self-discharge of lithium-ion batteries: physical micro short-circuit and chemical reaction.

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Types of rechargeable batteries and explanation of battery charging performance terms

Wednesday, October 14, 2020 12:44:48 AM America/Los_Angeles

1. Types of rechargeable batteries: Nickel-cadmium battery (Ni-Cd), Ni-MH battery (Ni-MH), Lithium ion battery (Li-lon), Li-polymer battery (Li-polymer), Lead-acid battery (Sealed) ...

2. Explanation of battery charging performance terms...

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What are the common positive and negative materials in the lithium ion battery industry ?

Monday, September 21, 2020 1:43:56 AM America/Los_Angeles

What are the common positive and negative materials in the lithium-ion battery industry? The main constituent materials of lithium-ion batteries include electrolytes, separator materials, and positive and negative electrodes. Cathode materials and anode materials are one of the key materials that determine the performance of lithium-ion batteries, and are also the main source of lithium ions in current commercial lithium-ion batteries. Their performance and valence have a greater impact on lithium-ion batteries.

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Why can't the maximum voltage of a lithium ion battery be higher than 4.2V?

Tuesday, September 8, 2020 1:01:19 AM America/Los_Angeles

The voltage of a lithium ion battery is determined by the electrode potential. Voltage, also known as potential difference, is a physical quantity that measures the energy difference of electric charges in an electrostatic field due to different potentials. The electrode potential of lithium ion is about 3V, and the voltage of lithium ion batteries varies with different materials. For example, a general lithium-ion battery has a rated voltage of 3.7V and a full-charge voltage of 4.2V; while a lithium iron phosphate battery has a rated voltage of 3.2V and a full-charge voltage of 3.65V. In other words, the potential difference between the positive electrode and the negative electrode of a lithium-ion battery in practical use cannot exceed 4.2V, which is an element based on material and use safety.

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What is a high-rate polymer lithium-ion battery?

Friday, August 21, 2020 1:19:46 AM America/Los_Angeles

High-rate polymer lithium-ion battery, let's first understand the concept of rate. How to understand the discharge rate? The discharge rate refers to the current value required by the battery to discharge its rated capacity within a specified time. The data value is equal to the multiple of the battery's rated capacity, usually represented by the letter C. Generally speaking, if the C number is greater than 1, it means a high rate. High rate is a relative concept. The larger the C number of a lithium-ion battery, the higher the rate of the battery.

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