How to calculate the battery size of an electric vehicle?

Introduction How to calculate the battery size of an electric vehicle? How big is an electric vehicle battery? There are markings on the battery of an electric vehicle: such as 6--DZM--126---DZM--20. Those in front are electric vehicles.

How to calculate the battery size of an electric vehicle?

The size of the electric vehicle battery? There are markings on the electric vehicle battery: such as 6--DZM--126---DZM--20. is the capacity. It reads: 12 volts 12 amps.

In 1860, the Frenchman Planté invented a battery using lead as an electrode. The unique feature of this type of battery is that it can be recharged and used repeatedly, which is why it is called a “lead acid battery”. Therefore, the vast majority of current electric vehicles are equipped with lead-acid batteries, because lead-acid batteries are inexpensive and cost-effective. At the same time, some electric vehicle batteries use lithium batteries.

Detailed information:

The capacity of the battery is generally calculated in AH (amp-hours), and the other is calculated in watts (W) of CELL (plateunitary). (W/CELL)

1. Calculation of Ah (amp-hours), discharge current (constant current) I × discharge time (hours) T. For example, if a 7 Ah battery has a continuous discharge current of 0.35 A, it can last 20 hours.

2. The standard charging time is 15 hours and the charging current is 1/10 of the battery capacity. Fast charging will shorten battery life.

Excuse me? My original electric car is 64v20A. I want to change it to 48, 6O and 72 lithium batteries. Can it be used?

Lithium batteries: lightweight, high specific energy, but poor safety and low cost performance; lead-acid batteries are heavy, large in size, low specific energy, but good safety and high performance. .

How to correctly distinguish between lead-acid batteries and lithium batteries:

Battery capacity

The capacity of lithium batteries ist generally 8 to 10A, and that of lead-acid batteries The capacity is about 20A.

In terms of kilometers traveled

For example, with the same 48 V battery, when fully charged, electric vehicles equipped with lithium batteries and lead acid batteries can travel 30 to 40 kilometers. its speed depends mainly on the size of the motor used.

In terms of durability

(1) Lithium batteries have strong durability, slow consumption, can be charged and discharged more than 500 times, and have no memory . 4-5 years. Lead-acid batteries generally have a memory of less than 400 deep charges and discharges and have a lifespan of approximately two years. If you are using a maintenance-free lead-acid battery, be aware that the battery loses little water and it is usually not necessary to add distilled water when using it.

(2) In terms of durability, lithium batteriesium have good resistance to vibrations. The fully charged battery is securely attached and vibrates at an amplitude of 4 mm and a frequency of 16.7 Hz for 1 hour without leakage or battery. Expansion and rupture, normal open circuit voltage, good overcharge resistance, 25 degrees Celsius, fully charged battery 0;.1CA charging for 48 hours, no leakage, no expansion or rupture of the battery, the voltage in open circuit is normal, capacity retention rate is above 95%, good resistance to large current, battery fully charged, 2CA discharges for 5 minutes or 10CA discharges for 5 seconds; . No conductive parts are melted and there is no appearance deformation.

In terms of price and warranty period

The most common battery currently on the market is 48 volts. If it needs to be replaced, lead-acid batteries cost about 380-450 yuan (48V12AH-48V20AH), and theThe warranty period is 1 year; Lithium batteries are relatively expensive, costing around 1,000 yuan (48V12AH), but their warranty period is 2 years.

In terms of price and warranty period

The common battery on the market is 48 volts. If it needs to be replaced, the lead acid battery is around 450 and warranty. the period is 1 year; lithium battery price. It is relatively expensive, costing around 1,000 yuan, but its warranty period is 2 years.

Only 60 lithium batteries can be used.

The 64V display on an electric vehicle means a battery with a rated voltage of 60V, so the selected lithium battery must also use a rated voltage of 60V, otherwise the vehicle will not work if the voltage is low. is low and the circuit will be burned if the voltage is high.

There is no limit to the capacity of the lithium battery. The size of thebattery will only affect the distance traveled by the electric vehicle, i.e. the cruising range. the longer the driving distance.

Detailed information

Precautions for using lithium batteries:

1. Lithium batteries are strictly prohibited from charging from the discharge terminal and must be charged from the charging socket using a corresponding socket. special charger. When the charging indicator bar on the charger stops scrolling, please remove the charging plug in time to avoid overcharging the battery.

2. The lithium battery has overcurrent protection function. When the current used by the electrical equipment exceeds the maximum output current of the product, the overcurrent protection circuit operates and the electrical equipment pops up. being unable to work normally.

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