How to judge whether the battery is sufficient?

How to measure and judge with a multimeter:

Measurement in battery discharge mode: Measure the terminal voltage of each cell in the battery pack, and if the terminal voltage of one or more of the cells is higher or lower than the nominal voltage (nominal voltage 12V cells), the battery aging is judged.

Measurement in mains mode: the charging voltage of each battery terminal in the battery pack, if the charging voltage of one or more of the batteries is higher or lower than the other voltages, the battery aging is determined.

Measure the total voltage of the battery pack: the total voltage of the battery pack is significantly lower than the nominal value (taking the nominal value of the C1K battery pack as an example, for example), it cannot be restored to the normal value after charging for 8 hours, even if it is restored to the normal value, the discharge time cannot reach the normal discharge time, and the battery is judged to be aging.

Battery boot measurement: UPS does not turn on, do not connect to the mains, first use a multimeter to measure the total voltage of the battery pack, at this time the voltage may be between 36V-40V, which is a normal value, do not leave the meter pen, keep staring at the instructions of the multimeter, and then connect the boot button, if the total battery voltage immediately drops to below 30V or even more than a dozen volts, UPS will automatically shut down immediately, and the voltage will be restored to the original value immediately after shutdown. Determine the aging of the battery.

Generally, the multimeter measurement battery can only be qualitative, but not quantitative, and the completely bad can be judged (the plate falls off, fractures lead to no voltage charging and no current, etc.), and it is difficult to judge the increase in internal resistance, the voltage is normal, there is also a charging current, with a small load bulb. No problem, but not with a high current discharge (starting the motor to work). You can try to use 20A gear (some meters have a range of even more than 20A) to measure the instantaneous short-circuit current approximately, but it is not easy to burn the meter and burn the line, and the accurate judgment is still to use the battery tester.

In addition, there are simple ways to judge the quality of the battery:

1. Judging from the appearance.

Observe the appearance for deformation, protrusion, leakage, rupture, scorching, and oxide exudation at the screw joint.

2. On-load measurement.

If there is no abnormality in appearance, the UPS works in battery mode with a certain amount of load, if the discharge time is significantly shorter than the normal discharge time, after 8 hours of charging, it cannot restore the normal backup time, and the battery is judged to be aging.

At present, there are two types of batteries used in electric vehicles. One is a lead-acid battery, and the other is a lithium battery, and the lead-acid battery is printed on the wall of each battery with a battery capacity mark. For example, 20Ah means that the battery is a 20 amp battery.

If the lithium battery is produced by a regulated manufacturer, the battery voltage and current are also printed on the outer packaging.

Only the box that opens the battery, from the appearance of the battery, is that the side of the battery will be marked.

Electric vehicle battery is the power of electric vehicles**, the vast majority of electric vehicles are equipped with lead-acid batteries, lead-acid batteries have low cost, high cost performance, can be charged, and can be used repeatedly.

Ask how to measure the actual A number of battery cars.

Answer: (1) first pull out the red watch pen of the multimeter, insert the gear of 10A or 20A (2) Turn the rotary switch to cause the DC current of 10A or 20A (3) Pull out the power plug of the electric vehicle, the two power cords are only disconnected from one, and the other is connected in series with the red and black watch pens of the multimeter, 4) Turn the handlebar, then look at the current reading of the multimeter, which is the result of more than 6

It is not a few amperes but how many ampere-hours that is, ah, which is the capacity of the battery rather than the current value, which is generally marked on the battery label.

The batteries are all marked.!

You can find the manual on the regular battery car, and the output voltage of the battery car is indicated on the manual, that is, how many volts, and after opening the battery cover, you can check how many amperes the battery capacity used by the battery car.

The battery voltage and capacity used in the battery car are expressed by V and A, V stands for volt, which refers to the total voltage of the battery car, A refers to the ampere, which refers to the capacity of the battery car, and usually, the mileage that the battery car can drive is determined by the battery capacity used in the battery car.

The larger the battery capacity used in the battery car, the longer the driving range will be, and the smaller the battery capacity used, the closer the driving range will be.

In addition, the power of the battery car is determined by the voltage, that is, the greater the total voltage of the battery, the stronger the power of the battery car, and the smaller the total voltage of the battery, the smaller the power of the battery car.

The battery voltage and battery capacity used by different brands and different types of battery cars are different, mainly according to the specific use of the battery car.

In addition, the power of the electric vehicle is not determined by the battery alone, but also depends on the controller and the motor, and these comprehensive factors need to be considered to determine the power of the electric vehicle.

1. Look at the charger: the output voltage **V DC **A36V is: the output voltage is 36V--42V DC**A.

If yes, then it's 10ah.

If yes, then it's 12ah.

48V is: output voltage 48V--59V DC**A.

If yes, it's 48v10ah.

If yes, it's 48v12ah.

If yes, it's 48v14ah.

If yes, it's 48v17ah.

If yes, it's 48v20ah.

2. Look at the battery logo of the electric vehicle.

6-DZM-14 means that this battery is 14ah, 6-dzm-12 is 12ah, and 6-dzm-10 is 10ah. 6-DZM represents lead-acid type batteries, and the following numbers represent capacity, and there are also 17Ah and 20Ah batteries.

Use a multimeter.

Multimeter, also known as multiplex meter, multi-meter, three-purpose meter, multi-meter, multi-meter, etc., is an indispensable measuring instrument for power electronics and other departments, generally for the main purpose of measuring voltage, current and resistance.

Multimeters are divided into pointer multimeters and digital multimeters according to the way they are displayed. It is a multi-functional, multi-range measuring instrument, generally multimeter can measure DC current, DC voltage, AC current, AC voltage, resistance and audio level, and some can also measure AC current, capacitance, inductance and some parameters of semiconductors.

Composition:

The multimeter consists of three main parts: the meter, the measuring circuit and the transfer switch. The multimeter is the most basic tool in the field of electronic testing, and it is also a widely used test instrument. Multimeter is also called multimeter, three-purpose meter (a, v, that is, current, voltage, resistance three-purpose), multiplex meter, multimeter, multimeter is divided into pointer multimeter and digital multimeter, there is also an oscilloscope multimeter with oscilloscope function, is a multi-functional, multi-range measuring instrument.

Generally, the multimeter can measure DC current, DC voltage, AC voltage, resistance and audio level, and some can also measure AC current, capacitance, inductance, temperature and some parameters of semiconductors (diodes, transistors). Digital multimeters have become mainstream and have replaced analog meters. Compared with analog instruments, digital instruments have high sensitivity, high accuracy, clear display, strong overload capacity, easy to carry, and are more convenient and simple to use.

20 ampere, not an.

20 amperes means that a discharge of 20 amperes can be discharged for one hour.

And so on, a 10-hour discharge can be discharged for two hours.

5A discharge, can be discharged for 4 hours.

You look for a car headlight (usually 5A) and connect it to the battery to discharge. If it can be stored for 4 hours, it means that the capacity is 20ah

Connect a light bulb in series, put the battery out, be sure to remember the time, and then take the car to run while charging, if it is more than 50 kilometers on the means that it is enough for 20a, and it means that it is almost to 20a

Ah (ampere-hours) and mAh (milliampere-hours) refer to the capacity of the battery (you can understand how much battery is charged). In addition to the AH (ampere-hour) of each battery, there is also its nominal voltage of what V (volts), such as 12V 55Ah means that the battery is 12V 55Ah. It is an important indicator of the battery.

That is, 1ah = 1000mAh watt a*v kWh a*v * h * 1000 battery capacity ah = kWh 1000 V

There are many units used in energy (work) and power, and there is a certain conversion relationship between these units, such as watts and kilowatts of power, and kilowatt-hours of work. "Wa" can also be expressed as "volt-an", and now you should understand the meaning of "an-hour". It indicates the battery life at a certain current under the rated voltage of the battery, and 10 A hours means 10 hours at 1 amp, or 1 hour at 10 amps.

It is a direct way to express the battery life, or it can be said to be an indirect way to express the amount of energy stored in the battery.

Electric vehicle batteries.

The capacity is marked on the battery, such as: 6-dzm -dzm -dzm -dzm -dzm -dzm-20, etc., the first digit 6 means that the battery is composed of 6 single batteries, that is, 6 grids; DZM means electric moped sealed battery; The following numbers are the labeled capacity of the battery, and the labeling unit is ah[amperes].

hours], that is, how many "amps" the battery is called.

Some manufacturers will deliberately put the battery capacity in order to increase the selling point.

False standard, 10ah marked 12ah, 12ah marked 14ah, 17ah marked 20ah, etc., if it is a false standard battery, it can be distinguished from the slag judgment: if it is a 14ah battery, it will be much larger than a 12ah battery, the general 12ah battery box can not fit at all, if the beam file buys the battery when you find that the battery is marked with 14ah, as long as you compare it with the 12ah battery, the size will be clear at a glance.

The 17ah battery is the same size as the 20ah battery, but the top of the 17ah battery is hollow, that is, there is a so-called handle, while the 20ah battery is solid and weighs heavier than the 17ah battery. When purchasing, please pay attention to the distinction and choose the appropriate battery model.

Hello Qi Pei, I am happy to answer for you, the capacity of the battery is marked on the battery, such as: 6-dzm -dzm -dzm -dzm -dzm -dzm-20 and so on, the first digit 6 means that the battery is composed of 6 single batteries, that is, 6 grids; DZM means electric moped sealed battery; The following numbers are the labeled capacity of the battery, and the marking unit is ah [ampere-hour], that is, how many "amps" the battery has, and you can also use a multimeter to measure and judge.

The design life of the battery is 27 months, almost all the batteries used in the car are lead-acid batteries, the biggest feature of the lead-acid battery is that with the use of the battery, the plates gradually age, when the capacity is reduced to 80% of his rated capacity, it may be a "diving" decline, although the car battery may still be able to provide a certain amount of energy, but may be scrapped at any time. If this time limit is reached or approached and the following phenomena occur, it is recommended to replace:

1. The headlights can be turned on for inspection. If the light is white, it means that the battery is normal; If the light is red and dim, it means that there is not enough power.

2. Turn on the starter, if the speed is normal, although the light is slightly dimmed, but there is still enough brightness, it means that the battery is good and the charge is sufficient.

3. If the starter appears weak and the light becomes very dim, it means that the battery is over-discharged and should be charged or replaced immediately. When the horn is not in the car, the sound is relatively low, indicating that the power of the battery is relatively weak, so be careful. It is best to go to the repair shop to use a car battery tester or car battery analyzer to detect and judge the aging and scrapping of the battery.

Extended information: The car battery, also known as the storage battery, is a type of battery, and its working principle is to convert chemical energy into electrical energy. Usually, people refer to batteries as lead-acid batteries. That is, a battery mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution.

The normal service life varies from 1 to 8 years, which has a lot to do with the condition of the vehicle. In the case of normal backflush power of the vehicle generator and no leakage of electrical appliances, it can be used for more than 3 years. If you feel that the charge is not charged or the starter is weak, the headlights are obviously dimmed, you need to remove the battery and charge it with the charger for 12-24 hours, if it is not possible and the mileage has reached more than 50,000km, and the generator is not faulty, you need to consider changing the battery, the general domestic maintenance-free such as:

Sail, Zhengye, extraordinary and other brands are good, ** according to the different battery models in the range of more than 200 yuan to more than 1000 yuan.