How to distinguish between real and fake lithium batteries, and how to distinguish whether an electr

Go to the mobile phone store and look for the person who repairs the mobile phone to help you, and you will know that they all have a special shake meter.

Electric vehicle batteries are generally lead-acid batteries and lithium batteries. Identify whether it is a lithium battery:

1. Looking at the volume, the volume of lithium batteries is generally smaller than that of lead-acid batteries;

2. Mention, looking at the weight, lithium batteries are lighter than lead-acid batteries;

3. Disassemble the shell, the lead-acid battery is generally composed of 4 small batteries or 6 small batteries, otherwise it is a lithium battery.

I'm afraid it's impossible. But it also needs to be analyzed on a case-by-case basis.

I just recently bought an electric car.

At first, I also wanted to buy lithium batteries, and I thought it was lightweight and fashionable, but after thinking about it carefully, I still bought lead-acid batteries.

Because lithium batteries are not suitable for high-current discharge, and they are very high, under the same capacitance, they are much higher than lead-acid batteries. And the lightness of lithium batteries will make the car easy to steal. Heavy trucks are hard to steal after all.

I saw a folding car with a lithium battery priced at 1999. It obviously uses a lithium battery, which is also very cheap. The weight is only. Seems perfect. But if you look closely, you will see that its range is only written 20km.

Because lithium batteries are expensive, it is very expensive to have the same capacity as lead-acid batteries, so the battery is indeed a lithium battery, but the capacity has shrunk.

The biggest difference between a lithium battery and a lead-acid battery is that it is lightweight. Just take it and you'll know.

Lithium batteries that are too cheap are very suspicious, and I'm afraid they can break easily.

Lithium batteries are very light, ordinary lead-acid batteries are very heavy, obviously there is a lot of difference, for example, 36V-10A ordinary lead-acid batteries are about kilograms, lithium batteries, just 2-3 meters.

The second is different, the lead is more than 300, and the lithium is about 1000.

However, lithium batteries** are hardly safe to evacuate.

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;

How to detect the quality of lithium batteriesLithium battery detection chain smock method: 1. The fastest inspection method is to test the internal resistance and the maximum discharge current. Using a multimeter with a range of 20A, the two electrodes of the lithium battery are directly short-circuited, and the current should generally be about 10A, or even higher, and it can be maintained for a period of time, and the relatively stable battery is a good battery.

2. Look at the appearance. The fullness of the appearance, such as the general lithium battery of about 2000mAh, is relatively large. The workmanship is more delicate or the packaging appears fuller.

3. Look at the hardness. You can pinch the middle part of the lithium battery lightly or moderately by hand, and the hardness is moderate, and the lack of soft extrusion proves that the lithium battery cell is a relatively high-quality battery. 4. Look at the weight.

Remove the outer packaging to perceive whether the weight of the battery is relatively heavy, if it is heavy, it belongs to the high-quality battery. 5. In the process of live working of the lithium battery, if the two poles of the battery are not hot after continuous discharge for about 10 minutes, it proves that the battery protection board system is perfect, and the quality of the lithium battery with high-quality protection plate is generally better than that of ordinary lithium batteries.

1. Test with a multimeter DC gear greater than the rated voltage of the battery. For example: test dry battery 9V, test with DC10V, DC2V file.

2. After selecting the gear according to the rated voltage of the lithium battery, use the meter pen to connect the positive and negative poles of the battery respectively. When the test voltage is greater than or equal to the rated voltage marked by the battery. The battery is in good condition.

When the test voltage is less than 10% of the rated voltage, the battery can be used on electrical appliances with a small depth of discharge. For example: quartz clocks, remote controls and other electrical appliances.

When the test voltage is less than 20% of the rated value, the battery has no use value.

3. It should be reminded that the voltage of the rechargeable battery is generally 15%-25% lower than that of similar batteries, example 5 The battery voltage is, and the rechargeable battery is generally only, so the rated value of the battery should be carefully confirmed.

Summary. The four types of lithium batteries can be distinguished by observing the size of the battery. First of all, you can observe the size of the battery, because the volume of lead-acid batteries is relatively large, while the volume of lithium batteries is relatively small.

The next way is to take it out and turn it upside down. Comparing the weight of the battery, normally speaking, the lead-acid battery will be very heavy due to its large size. Lithium batteries are relatively light in weight because of their small size.

The four types of lithium batteries can be distinguished by observing the size of the battery. First of all, you can observe the size of the battery, because the volume of lead-acid batteries is relatively large, while the volume of lithium batteries is relatively small. The next way is to take it out and turn it upside down.

Compared with the weight of Shen's pure battery, normally speaking, the weight of lead-acid batteries will be large due to the large body width. Lithium batteries are relatively light in weight because of their small size.

The method is to disassemble the shell of the battery. Take a closer look at the composition of the Dianxi rock pond inside. Because lead-acid batteries generally have four small or six small disassembled batteries to form a complete battery, but lithium batteries do not.