How to judge the positive and negative electrodes of 18650 lithium battery and three judgment partie

Look at the silk screen: the silk screen is on the front of the silk screen, which is generally left positive and right negative.

2. Look at the shape of both ends: the raised end is positive, and the flat bottom is negative.

3. Multimeter.

Measurement: red and black pen, red line is + in the case of positive numbers, black is -, red pen corresponds to - electrode in the case of negative number, black pen corresponds to + electrode.

Although there are many types of vehicles, the structure is similar. This should be said to be the credit of standardization, but also the need for large-scale production lines. With the development of society, the progress of science and technology and the change of demand, the shape of railway vehicles has begun to change, especially the passenger car is no longer the same old face.

However, their basic structure has not changed significantly, but the specific parts have a more scientific and advanced structural design.

Generally speaking, the basic structure of the vehicle is composed of five parts: the car body, the undercarriage, the running part, the coupler buffer device and the braking device.

The body is the part of the vehicle that is used to load goods or passengers, and is the basis for the installation and connection of other components of the vehicle. The body of the early vehicles was mainly made of wood, supplemented by steel plates, bow rods, etc. In modern times, the car body is mainly steel structure or light metal structure.

discriminant methods; 1. Look at the silk screen: the silk screen is on the silk screen, which is generally left positive and right negative; 2. Look at the shape of both ends: the raised end is positive, and the flat bottom is negative. 3. Multimeter measurement:

The red and black pen, the red line is + when the positive number is displayed, the black is -, the red pen corresponds to the - electrode when the negative number is displayed, and the black pen corresponds to the + electrode; 4. Look at the appearance, the modified battery is generally the original shape, look at the insulation guarantee at both ends, there is a concave ring at one end, there is no one end, some are positive, and there is no negative; 5. Some manufacturers do not produce in accordance with battery standards and labels, so they should actually measure and consult the manufacturer and ask for specifications;

There are three main ways to discriminate:

The raised end of the lithium battery is the positive electrode, and the flat end is the negative electrode;

2. Measure with a multimeter. When a positive number is displayed, the red pen is the positive pole and the black pen is the negative pole; When a negative number is displayed, the red pen corresponds to the negative electrode on the ridge, and the black corresponds to the positive electrode;

3. Judging by silk screen printing, there is a silk screen as a positive electrode. Generally left-positive, right-negative;

4. Look at the appearance, the modified battery is generally the original shape, look at the insulation guarantee at both ends, there is a concave ring at one end, there is no one end, some are positive, and there is no negative;

Identification method: 1. Look at the silk screen: the silk screen with the silk screen is on the front to the silk screen, which is generally left positive and right negative;

2. Look at the shape of both ends: the raised end is positive, and the flat bottom is negative.

3. Multimeter measurement: red and black table pen, the red line is + in the case of positive numbers, the black is -, the red pen corresponds to the - electrode in the case of negative numbers, and the black pen corresponds to the + electrode;

4. Look at the appearance, the modified battery is generally the original shape, look at the insulation guarantee at both ends, there is a concave ring at one end, there is no one end, some are positive, and there is no negative;

5. Some manufacturers do not follow the battery standards and identify the lack of production, so they should actually measure and consult the manufacturer and ask for specifications;

Identification method: 1. Look at the silk screen: the silk screen with the silk screen is on the front to the silk screen, which is generally left positive and right negative;

2. Look at the shape of both ends: the raised end is positive, and the flat bottom is negative.

3. Multimeter measurement: red and black table pen, the red line is + in the case of positive numbers, the black is -, the red pen corresponds to the - electrode in the case of negative numbers, and the black pen corresponds to the + electrode;

4. Look at the appearance, the modified battery is generally the original shape, look at the insulation guarantee at both ends, there is a concave ring at one end, there is no one end, some are positive, and there is no negative;

5. Some manufacturers do not follow the battery standards and identify the lack of production, so they should actually measure and consult the manufacturer and ask for specifications;

Identification method: 1. Look at the silk screen: the silk screen with the silk screen is on the front to the silk screen, which is generally left positive and right negative;

2. Look at the shape of both ends: the raised end is positive, and the flat bottom is negative.

3. Multimeter measurement: red and black table pen, the red line is + in the case of positive numbers, the black is -, the red pen corresponds to the - electrode in the case of negative numbers, and the black pen corresponds to the + electrode;

4. Look at the appearance, the modified battery is generally the original shape, look at the insulation guarantee at both ends, there is a concave ring at one end, there is no one end, some are positive, and there is no negative;

5. Some manufacturers do not produce in accordance with battery standards and labels, so they should actually measure and consult the manufacturer and ask for specifications;