How do you test the quality of electric vehicle battery?

Doing endurance tests, the people who have been riding the electric belt have been running: now the life of ordinary electric vehicle batteries is more than one year. Try to choose the products of famous brand manufacturers, go to the regular store to buy, and avoid buying refurbished batteries.

In fact, as long as the new battery is almost the same, the key is to pay attention to the future use, in order to extend the service life. The following are some maintenance methods for the battery:

1. The battery should be installed firmly on the electric bicycle to prevent the battery from being damaged by vibration during riding.

2. Always remove dust and dirt from the battery cover, and keep the battery dry and clean to prevent the battery from discharging itself.

3, absolutely cannot let the battery in a state of insufficient power for a long time, and to develop a good habit of charging the battery every night.

4. When the electric bicycle is just starting, it should be started with the pedal boost to avoid the battery current being damaged due to excessive discharge current.

5, when riding, should pay attention to not allow the battery to discharge, over-discharge easily cause serious battery losses, thus greatly shortening its service life. Under-voltage protection is generally provided on electric bicycles. When only one indicator light is on, the battery should be charged immediately to avoid over-discharging of the battery.

Identification of the pros and cons of the battery

When consumers purchase batteries, they must first look at whether the outer packaging of the electric vehicle battery is damaged or has signs of disassembly. Then open the package to see the appearance of the battery, and see if there are traces of sanding and scratching on the surface of the exterior. Whether there is rust on the metal terminal part of the battery; (such as: Tanon's new big black cow battery, the original Tanon big black cow battery packaging is printed with Li Chen's image photo, product batch number, etc.).

Battery life problem

According to statistics, the length of service life of a group of electric vehicle batteries is not only related to the quality of the battery products of the manufacturer and the system configuration of the electric vehicles, but also has a great relationship with daily maintenance and consumer use. You can also try it yourself. Take the 48-volt motor 500-watt electric car as an example. If it is just fully charged, if it suddenly accelerates the ride, if the battery gauge needle only falls less than half a grid is the new battery; if the battery gauge needle falls It is a new and old battery; if the power meter pin falls 2-3 grids is the old battery that is quickly scrapped; if it is more than four grids, it is basically a scrapped battery.

Old and new batteries can't be chained together and used

According to experts, the original new battery is packaged after being assembled. If it is mixed with the old battery, it will affect the performance of the new battery and cause the new battery to decay prematurely! Greatly reduce the battery life.

How to judge bad battery

How to check for bad batteries? We first fully charge the electric vehicle, put it for a few hours or ride for a while, and measure its voltage at the charging plug. Regardless of the old and new batteries, if the measurement is 48v or slightly higher, it is a normal battery; if it can only reach 46v or below, it means that one battery has a short circuit; if it shows 10v, the whole battery is bad.

It is most convenient to use the resistance wire of the electric furnace to clamp the positive and negative poles of the battery after the series connection, and then use the multi meter to measure the voltage of each battery. If conditions permit, you can use a special instrument to check the pressure difference of each battery. Generally, the maximum and minimum voltage difference of 6v will require the battery to be replaced. Hope to adopt!

Electric vehicle batteries generally refer to batteries used in electric bicycles, and their functions are to provide power for electric vehicles. At present, the most used is the valve-regulated sealed lead-acid battery, because the lead-acid battery is low in cost and cost-effective. Others include nickel-metal hydride batteries, nickel-cadmium batteries, lithium-ion batteries, and polymer lithium batteries .

1. Watch the battery old and new:

In fact, this is a very good judgment, generally get the hand, look at the appearance can judge, whether there is grinding, scratching

Traces and then look at the metal parts of the battery positive or negative rust.

2. Use a professional measuring voltage tool to determine if the battery has an internal short circuit (bad battery):

After riding for a while or charging for a few hours, the car is measured at a charging plug and the voltage is measured.

48 volts or a little higher is a normal battery (regardless of old and new). If it can only reach 46 volts or less, it means there is one

There are short circuits in the battery (four sets of batteries in 48 volts, each set consists of 6 2 volt batteries connected in series to 12 volts).

This group of 10 volts is a bad battery.

3. Determine the scrapped battery:

1) After the battery is fully charged, if the speed is suddenly accelerated, the battery gauge needle will only fall less than half a grid (a small scale).

It is a new battery.

2) After the battery is fully charged, if it suddenly accelerates the ride, the battery gauge needle falls to the grid, which is the old and new battery.

3) After the battery is fully charged, if it suddenly accelerates the ride, the power gauge pin drops 2-3 grids, it is quickly scrapped.

Old battery (full of electricity for half a month without using will also run out of power by self-discharging).

4) Just after fully charged, if you suddenly accelerate to ride more than four squares, you will scrap the battery. (full week without electricity)

When riding, electricity will self-discharge and run).

These are some simple ways to tell you how to judge the authenticity of an electric car battery today.