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The capacity of dry batteries varies greatly among different types and brands,

The No. 5 zinc dry battery may only have around 500mAH, while the high-quality No. 5 alkaline battery may have around 2000mAH.

Disposable batteries generally do not have a nominal battery capacity, while rechargeable batteries only have a nominal capacity.

1、 Comparison table of common battery models and sizes

Flat head refers to the fact that the positive electrode of the battery is flat without protrusions, and is used for spot welding of battery cells. Generally, the same model of pointed head (which can be used for single battery power supply) has an additional height of 0.5mm. And so on, I won't explain it one by one. Moreover, many times batteries are not standardized in terms of main models such as AAA, AA, A, SC, C, D, N, F, and there are often scores such as 1/3, 2/3, 1/2, 2/3, 4/5, 5/4, 7/5, which represent the corresponding height of the battery. For example, "2/3AA" represents a rechargeable battery that is 2/3 higher than a typical AA battery; For example, "4/5A" refers to a rechargeable battery that is 4/5 higher than a typical A battery.

Introduction to Common Battery Models and Dimensions

2、 Model and size of lithium-ion battery cells

(1) Cylindrical lithium-ion battery cells: usually represented by five digits, the first two digits refer to the cell diameter, and the last three digits refer to the cell height. For example, 14500 refers to AA batteries, which have a diameter of approximately 14mm and a height of 50mm. Common models: 145001465017490185001865026500.

Common specifications and models of Bike and Sanyo cylindrical battery cells:

Bike 186502200mAh 3.7V, Bike 186502600mAh 3.7V, Bike 186502000mAh 3.6V ternary long life

Sanyo 186502100mAh 3.7V, Sanyo 186502500mAh 3.7V, Sanyo 186501500mAh 3.7V18650

(2) Square lithium-ion battery cells: usually represented by six digits, representing the thickness, width, and height of the battery, in millimeters. For example, 103450 is 10 (thickness) x 34 (width) x 50 (height) mm. If the thickness value is greater than the width value, the thickness should be * 0.1, for example, 433861 is 4.3 (43 * 0.1) x 38 x 61mm.

Common specifications and models of Bike and Sanyo square battery cells:

Bike 523450A1000mAh 3.7V, Bike 063450A1200mAh 3.7V, Bike 633770A 2020 mAh 3.7V

Sanyo UF103450P1880mAh 3.7V, Sanyo UF653450R1100mAh 3.7V103450

Introduction to Common Battery Models and Dimensions

Introduction to Common Battery Models and Dimensions

Battery model

China is named according to international conventions, and the classification of cylindrical battery models is:

AAA, AA, A, SC, C, D, F types, a total of seven types

Number 5 and 7 are only different in size. Generally, number 5 is called AA and number 7 is called AAA,

The standard size for size 5 is: battery height 49.0 ± 0.5mm, diameter 16.8 ± 0.2mm.

The standard size for size 7 is: battery height 48.0 ± 0.5mm, diameter 14.1 ± 0.2mm.

There are dry batteries, lithium batteries, nickel hydrogen batteries, and nickel cadmium batteries made into sizes 5 and 7.

Common alkaline batteries (such as Nanfu Gathering Ring, Jinbawang, etc.) have a voltage of 1.5V for both No. 5 and No. 7, with a capacity of approximately 2400mAh for No. 5, also known as LR06 and 1300mAh for No. 7, also known as LR03.

In fact, there are other sizes of batteries, such as Type 1 (D-type), with a height of 59.0 ± 0.5mm and a diameter of 32.3 ± 0.2mm. Similar to the ones used in old-fashioned flashlights, they are also called large-sized batteries.

There is also type 2: C-type, with a battery height of 49.5 ± 0.5mm and a diameter of 25.3 ± 0.2mm, which is relatively rare, but there are many in some lithium batteries.

Each country has standards for the types of dry batteries, generally classified by electrolyte and shape size. Number 5 and 7 batteries are the standards of our country, while AA and AAA are the standards of the United States, which actually refer to one thing. The following is a brief explanation:

International Electrotechnical Commission China, Japan, United States, Germany

R401 A battery/N0.6R40 (EMT)

R201 battery UM-1DR25 (JaT)

R142 battery UM-2CR14 (ET)

R104 battery/(BR) R10 (CT)

R65 battery UM-3AAR6 (AaT)

R037 battery UM-4AAAR03

Seven types.

Specifically, as follows:

1. Introduction

A battery refers to a portion of the space in a cup, tank, or other container or composite container that contains an electrolyte solution and metal electrodes to generate electricity, and a device that can convert chemical energy into electrical energy. It can be divided into positive and negative electrodes. With the advancement of technology, batteries generally refer to small devices that can generate electricity. Like solar cells. The performance parameters of batteries mainly include electromotive force, capacity, specific energy, and resistance. By using batteries as an energy source, stable voltage, stable current, long-term stable power supply, and minimal external influence can be obtained. The battery structure is simple, easy to carry, and the charging and discharging operations are simple and easy to operate. It is not affected by external climate and temperature, and its performance is stable and reliable. It has played a significant role in various aspects of modern social life.

2. Rated capacity

The minimum capacity that a battery should be able to discharge under specified design conditions (such as temperature, discharge rate, termination voltage, etc.), in ampere hours, represented by the symbol C. The capacity is greatly affected by the discharge rate, so the discharge rate is often indicated in Arabic numerals in the bottom right corner of the letter C. For example, C20=50, indicating a capacity of 50 ampere hours at a rate of 20 hours. The theoretical capacity of a battery can be accurately calculated based on the amount of electrode active substance in the battery reaction formula and the electrochemical equivalent of the active substance calculated according to Faraday's law. Due to possible side reactions in batteries and special design requirements, the actual capacity of batteries is often lower than the theoretical capacity.

3. Rated voltage

The typical operating voltage of a battery at room temperature, also known as the nominal voltage. It is a reference for selecting different types of batteries. The actual working voltage of the battery varies with different usage conditions. The open circuit voltage of a battery is equal to the difference in the equilibrium electrode potential between the positive and negative electrodes. It is only related to the type of active substance in the electrode, and not to the quantity of active substance. The battery voltage is essentially a direct current voltage, but under certain special conditions, the phase transition of metal crystals or certain phase films caused by electrode reactions can cause small fluctuations in voltage, which is called noise. The amplitude of the fluctuation is small but the frequency range is wide, so it can be distinguished from self-excited noise in the circuit.

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