How to judge whether the battery is good or not?

1, choose according to your purpose

First, determine where the battery you choose is used, how to use an electric vehicle battery, a forklift battery, etc. If you need to output a large current instantaneously, choose a dedicated electric vehicle battery or a forklift battery. This kind of battery formula is suitable for large current charge and discharge, high cycle life. If it is used as backup battery, choose industrial lead battery, this type of battery is suitable for shallow charging, charging is generally online floating, high cycle life. The energy storage battery generally uses lead carbon battery, which increases the proportion of C in the negative lead paste, and is suitable for rapid charging, and has a relatively high service life compared with other batteries.

2, according to the mileage, backup time, before the class under the system capacity in crust

After determining the battery usage, further determine the specific needs, such as the mileage that the electric vehicle is expected to travel, the standard voltage, the maximum allowable battery volume, etc., and commission the professional to equip according to the above data. If it is a backup battery to provide back-up data such as time, load capacity; If it is a storage battery, to provide the front-end panels, capacity of the fan, need discharge data such as time, with the above requirements, factory technicians can choose the right battery for you.

3, according to the weight to judge the battery is good or bad

In determining the purpose and requirements, try to choose the famous brand in the battery, relatively more guaranteed quality and after sales.

In general according to the weight can judge the service life of battery, the battery is the main raw materials of lead, lead high, the proportion of the battery. The same capacity of battery, the heavier weight, with the higher the amount of lead, relatively more resistant to corrosion, the life also is higher.

4, according to the open circuit voltage to judge the battery is good or bad

The proportion of open circuit voltage of the battery with the internal acid has a lot to do, different series of the same capacity, battery, open circuit voltage is higher, after into the higher proportion of sulfuric acid, the less corrosion resistant, relatively short battery life.

5, according to the open circuit voltage difference of the battery ratio to judge the battery is good or bad

Group of battery, measure the open circuit voltage, general control in less than 20mv, as small as possible, is beyond the scope of the battery, the best removal, to ensure the consistency of the battery to ensure reliable set of battery life.

6, Observe the drop in battery open circuit voltage

If the situation permits, you can observe the change of the battery terminal voltage during the battery's rest period. The faster the drop, the worse the purity of the internal material is, the battery self-discharge is faster, and the relative life is worse.

7, which would you choose?

Know the purpose and requirements, as far as possible choose heavy weight small pressure difference in the group, small self-discharge of battery.

8, other influencing factors

The length of battery life, in addition to the affected by the above factors, also affected by other factors, such as: late internal assembly, welding, battery maintenance, using a variety of factors such as environmental temperature. And factory technical personnel of communication.

The multimeter generally only measures the voltage of the battery, and it is not easy to detect the quality of the battery (of course, if the voltage is very low or even zero, the battery is definitely broken). It is best to bring a load with a large power and a large current, and then connect the multimeter in series to see the current. If the current is large and the duration is long, the battery is good; otherwise, the battery is aging, or even broken. .

Electric wire discharge is a simple and effective method to measure the battery. The specific operation is:

1, Check if the voltage is balanced when the battery is not loaded, try to reach 12V upwards.

2, the heating wire connects to the battery when using the multimeter, measure current, the normal use 10 to 12 a, and make a mark in this paragraph, next time you should be more convenient.

3, test the battery voltage, current down to 11.See if there is any gap, if continued to have discharge to a battery in the middle of 10.Five other cell gap have 0.8 v, such as the difference between 0.More than 8 has battery lag behind.

The battery is broken; open the battery and look at it, the battery is hot you can also see the battery deformation phenomenon. This is due to the "thermal runaway" of the battery!

1. Charge the same green light, battery will heat up.

Now has the general battery basic problem, used a year and a half to two years will appear such problem! Now there is a kind of battery that is not full of drums, "Huatian digital battery", there is a protection chip on the top, if the battery is not drum, it can still be used for 1-2 years!

2. Choose a good charger can avoid this kind of phenomenon.

Recommend to use "health card"

3. The battery is good or bad, roughly 10 km ride after the battery is full, large current discharge (100 a) respectively to detect each battery voltage soft good around 9 v to 10 v, the lower the worse!

Accurate detection is good or bad, after full recharge the battery discharge time.12 ah good 2 hours, with 5 a discharge 20 ah10a discharge good 2 hours!

Battery fluid deficiency, need filling water maintenance, otherwise may the battery is bulge scrap.

If the rear wheels overhead, idle when the battery voltage is 11.95 illustrates battery performance is very consistent, such a battery maintenance good words can also be used for a long time.

If there’s a battery repair shop around you can go to maintain it. Otherwise, you can change a good quality charger. Generally speaking, the battery is not easily damaged in winter, but it must be handled before next summer.

The page contains the contents of the machine translation.