What does the voltage and current of electric vehicle battery determine?

There is a link between the voltage and capacity of a battery, but is nonlinear, so it is not feasible to use battery voltage to judge the battery capacity. We can't use chart to describe nonlinear, or it is difficult to use the formula to connect them.

In general, obvious when the battery voltage drops below the nominal capacity basically is close to zero.

But there seems to be a sold commercially battery capacity tester, 7000 a, principle is to use high frequency signal roughly jump battery to reflect the degree of response of the change.

It seems that you is how the battery is not very understand! It can be said that the battery capacity and voltage has nothing to do!

Battery and battery voltage of related materials, such as the lithium battery3.7 V lead-acid battery 2 V zinc manganese battery 1.5 V to 1.2 V Ni-Mh batteries, etc. As long as it is a monomer is the voltage, will not change. You can see some car battery is 12 v, but the inside is installed 6 pieces!

For example, the voltage = = the area of the water hydraulic pressure capacity and water area have a relationship?

Battery can hold to say how much electricity, you have to say how many how many AH such as 12 v10ah V battery, this is the real capacity!

Exercise of the electric vehicle mileage (will be subject to "battery life"), is associated with the motor power, also associated with the power supply capacity of the battery, the battery life is: the battery power supply capacity (voltage by capacity, namely: 60 v x 20 ah = 1200 Wh) present motor power (W), the result of calculation is the hour.

Under the condition of the battery capacity must be, and the battery voltage is proportional to the range of basic relations.

Range of electric vehicles and battery power, the product of the nominal capacity and nominal voltage of the battery is the power of the battery. It should be said that in the capacity of the battery must be the case, the battery voltage is proportional to the range of basic relationships.

Electric vehicle battery voltage and current output size determines the size of the motion of the electric power, voltage and current output is high, the power is strong, can achieve high speed, the electric vehicle, the voltage and current will remain relatively constant power output.

By the controller to control the electric car is to control the power output of the controller according to the required power electric vehicle running process, dictated by the battery power output, power = * current, the voltage at a constant power, the smaller the higher the voltage, current, generally when a constant power output at a constant speed in electric vehicles, so the electricity is one of the most provinces (small discharge current, voltage drop is slow).When starting or crawl wave motor power demand increase, the battery in the extension of running time, there will be more low voltage, electric current will be more and more big, especially in the electricity consumption in more than 50%, will show of hard work, because the current increasing, the battery voltage drop will appear sudden drop phenomenon to a controller protection voltage, will appear not to electric power.

Electric starting current, wave current; and the current is more uniform bike in 1.2 ~ 1.5 C, C 2 hour rate capacity for battery, battery capacity for 20 ah, for example, then the electric current is a 25 ~ 30 A. Large current discharge of battery will damage to a certain extent, and can shorten the discharge time, if started slowly turn the, let power increase slowly, will be large extent reduce the damage of the battery, and can extend the time of discharge, so as to extend the mileage.

Extension of the electric vehicle mileage method has the following:

1, should be started to slowly turn to can travel at a constant speed, reduce to accelerate the process, as far as possible, on the one hand, can prolong life, on the other hand is also beneficial to the battery life-span.

2, the improvement of electric vehicle configuration, improve battery capacity. If life is good, can be installed in a space under the premise of try to hold large capacity battery, can prolong line continuation.

Because power * = voltage current. Therefore, the higher the voltage and current, the greater the power is. For the battery, the more electricity is stored, for electric vehicles, battery storage power means that the more the farther can run, or the heavier, too fast. So is the higher the voltage is good, the greater the current, the better.

Now two rounds of the battery of electric vehicles usually have (3) only 36 v, 48 v (4) (5), 72 v, 60 v (6).There are two kinds of specifications, the shape is large, two kinds of younger. Big battery current is about 20 Ann, small battery current is 10 or so. Small battery with small size is suitable for portable car with big battery scooter applications.

The battery of same (shape), the underlying current capacity will be different, high-quality brand do current capacity big some. There are disorderly marks less known and inferior brand.

The higher the voltage (only), the body also is heavier, change the battery cost also is higher. Big battery weight is greater than the small battery, and the price is higher than the small battery.

Divided into electric and electric motorcycle, electric bike running mileage is determined according to the capacity of the battery, first say electric, calculate by new car 48 v12a battery can run 40 km, 48 v20a about 64 kilometers, 48 and 64 v12a v28a, 48 v30a until 60 a.V20a 60 and 64 of 90 km, 72 v20a V20A 120 km: electric motorcycle 48 v20a 40 km, 60 v20a and 64 v20a 55 km v20a also only 70 to 72 kilometers, the electric car generally is the control of the 350 w and 350 w motor, the same battery pack, the bigger the motor power of electric power, the greater the distance is less, that is to say, under the condition of constant voltage, battery Ann the greater the number of electric cars run more far. Now depends on your situation, if you run long distances every day, then you can choose several bigger, otherwise your day is not enough to ride. You choose if you want to fast and far 64 v or 72 v, the best is several large batteries, power consumption and large. Just walking, don't demand is too high, 48 V, pedal electric cars are lowest 20 A, if not use will be 30 A, because the life of the lead-acid battery is limited, no matter how much you is how many V A, Ann is the same number of battery charging and discharging. The future of your maintenance costs will be lower. I was selling electric cars, after we made it myself. So what is there to consulting can ask me.

From the perspective of the battery should buy lu, because of the high voltage, high efficiency. If it is 2 v power supply, also can achieve the same capacity and output power. Is the wastage of the lines will be very big, efficiency is low. Also, 6 volt 260 ah battery capacity is smaller than 140 ah - 12 v battery, small! There is low voltage motor power performance is very poor, slow speed, the controller performance is very poor, because need large current work. Power tube, now, it's easy to do a few hundred volts voltage large current is very hard, but do it will be hot in power tube. Also, electric bicycle motors are so young, out of 72 v, low voltage of the motor will be eliminated.

The question is difficult to answer, because large capacity is not the only basis for buying a battery. Judged by charging capacity, we may buy a battery with larger capacity but not larger voltage. As for capacity, capacity multiplying voltage is the total energy that battery can store. In this case, we may buy the battery with larger voltage rather larger capacity. But larger voltage battery has larger output power, and the speed of car will be faster. All in all, battery with larger capacity can work for longer time, while battery with larger voltage can have better speed. You need to consider this factor before buying. Besides, you need to focus on the quality and price, if you decide to buy an electrical vehicle.

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