What is the capacity of lead-acid battery for electric vehicle

At present the electric vehicle battery has the lead-acid battery, the lithium battery two kinds! Lead-acid battery has a capacity of 12AH, 14AH, 20AH and 24Ah, but the capacity of lithium battery is not certain, because lithium battery can be arbitrarily combined to get a large capacity battery, such as 48V40Ah, 72V80Ah and so on

Said electric vehicle battery capacity of the battery to store electrical energy, the electric vehicle battery after fully charged, to a certain value of continuous discharge batteries, from discharge to terminal voltage drop to provisions of discharging termination voltage, discharge current and time value, the product of said electric vehicle battery capacity of the unit for ampere hour, usually expressed in "Ah". Electric bicycle battery fully charged, the temperature of (25 + 2) ℃ environment let stand 1 ~ 4 h, and then to 1/2 rated capacity of the battery (2 hours) of constant current discharge to the monomer accumulator (A) the average voltage of 1.6 V (6 V battery is 4.8 V, 12 V) 9.6 is terminated, record the discharge time. The new electric vehicle battery in three tests, discharge time is more than 120min once is qualified. The actual discharge current of the electric vehicle multiplied by the actual discharge hours is the actual capacity of the battery.

The capacity of electric vehicle battery depends on the amount of active substance and electrolyte mass involved in electrochemical reaction. The manufacturing process of the plate, the size of the geometry and the temperature of the battery also have an effect on the actual capacity measured. The more the number of plates, the larger the relative area, the more active substances involved in the chemical reaction, the larger the electric vehicle battery; The higher the temperature of the battery, the electrolyte to the electrode penetration capacity is super strong, the depth of the active material involved in chemical reaction is deeper, electric car battery is also larger.

Valve-controlled lead-acid batteries commonly used in electric vehicles have 6-dzm-10 and 6-dzm-20 standard specifications. Here, 6 refers to the battery is composed of 6 clusters in series. The former has a 2Hr capacity of 10 ampere hours (Ah), while the latter has a 2Hr capacity of 20Ah. In order to adapt to more design, after adjusting the shape of the battery plate, thickness, quantity and electrolyte concentration, active substance dosage ratio and other processes, there are also such as 6-dzm-7, 6-dzm-12, 6-dzm-17, 6-dzm-18, 6-dzm-24 and other models.

Battery under specified conditions (including discharge intensity, discharge current and discharge termination voltage) discharge quantity or discharge time is called battery capacity, unit A·h or A·min. Automobile accumulator is a reversible dc power supply, which can convert chemical energy into electrical energy and electrical energy into chemical energy.

During engine start-up, it supplies power to the starting system and ignition system.

When the engine stops running or runs at a low idle speed, it powers the car's electrical equipment.

When demand exceeds the output of the charging system, it provides the current for a limited period of time.

The accumulator also absorbs the instantaneous overvoltage in the circuit to maintain the stability of the voltage of the automobile electrical system and protect the electronic components.

Batteries do not use for a long time, it will slowly self-discharge, until scrapped. Therefore, the car should be started at regular intervals to charge the battery. Another way is to pull out the two electrodes on the battery, it is necessary to pay attention to the electrode column from the positive and negative two electrode line, to pull out the negative line, or remove the negative and the car chassis connection. Then pull out the other end with a positive sign (+), the battery has a certain service life, to a certain period of time to be replaced. When changing, should follow afore-mentioned order likewise, when connecting electrode line however, order is just opposite, first connect positive pole, connect negative pole again next.

When the ammeter pointer shows insufficient power storage, to charge in time. The storage capacity of the battery can be reflected on the instrument panel. Sometimes in the road found that the power is not enough, the engine and flame out start not, as a temporary measure, you can ask for help from other vehicles, with their vehicles to start the vehicle battery, the two battery negative and negative connected, positive and positive connected.

The density of electrolyte should be adjusted according to the standards in different regions and seasons.

When the electrolyte is deficient, distilled water or special rehydration and nanometer carbon sol cell activator should be added. Avoid drinking pure water instead. Because pure water contains a variety of trace elements, the battery will cause adverse effects.

When starting the car, continuous use of the starter causes the battery to be damaged by excessive discharge. The correct way to use is to start the car each time the total time is not more than 5 seconds, again start interval is not less than 15 seconds. In the case of multiple starts without the car should be from the circuit, ignition coil or oil circuit and other aspects of the cause.

Daily driving should often check whether the small hole on the battery cover ventilation. If the small hole of the battery cover is blocked, the hydrogen and oxygen produced cannot be discharged, and when the electrolyte expands, it will break the battery shell and affect the battery life.

Check the positive and negative levels of the battery for signs of oxidation. Hot water can often be poured over the wire connections of the batteries.

Check whether there is aging or short circuit in each part of the circuit to prevent the battery from being decommissioned in advance due to excessive discharge. [1]

1. Excessive discharge

2. Storage of the battery for a long time (without charging during storage)

3. Cannot be charged by car engine

4. No electrolyte

5. Too high specific gravity of electrolyte

Charge at high temperature

7. Contamination by contaminants (e.g. hydrochloric acid, seawater, organic acid, etc.)

8. Add too much current when the battery is charged

9. The electrode plate deformation causes the positive plate and the coated plate to contact each other, resulting in a short circuit phenomenon

10. Deposit dirt on the upper and lower parts of the plate, causing short circuit

Just pay attention to avoid the above points, your battery life will increase accordingly. [2]

Electrolyte level should always be kept between Max and min, check once a month, and depending on the level of decline, appropriate supplement distilled water (pure water), do not add acid.

When the battery voltage is insufficient and the light is dim and the starting is weak, it should be charged out of the car in time.

Prevent the battery overcharge or long-term loss of power, overcharge will make active substances fall off, loss of power will make the plate vulcanization, to ensure that the regulator voltage can not be too high or too low.

In the process of use, should always check whether the vent is smooth, to prevent the battery deformation or burst.

Batteries should be kept away from heat source and open fire. Ventilation should be maintained during charging and use to prevent burning and injury.

To prevent the battery from discharging for a long time and a large current, the start-up time for each use shall not be more than 5 seconds, and the two consecutive start-up times shall be separated by 10-15 seconds.

The battery should be firmly installed on the car to reduce vibration.

Often check whether the battery cable is solid, all live joints, must keep good contact, prevent spark, cause the battery explosion. The oxides and sulfates produced by the clips must be scraped clean and coated with vaseline to prevent further corrosion.

Often clear the battery cover of dust and dirt and overflow of the electrolyte, keep clean and dry, prevent self-discharge.

Sealing gum cracking to repair in time.

Car driving in the cold region, to avoid complete discharge of the battery, so as to avoid freezing electrolyte. [3]

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