How is the battery capacity calculated?

C. Minimum battery temperature Pre-estimate the temperature conditions of the battery placement location and determine the minimum battery temperature. Generally, it is 50C when installed indoors, and -50C when installed indoors in particularly cold areas. When using an air conditioner to ensure the indoor temperature, the actual temperature shall be used as the lowest temperature. D. The lowest allowable voltage The lowest allowable voltage of a single cell (V/single cell) u003d (the lowest voltage allowed by the load + the voltage loss of the wire) / the number of cells in series 2. The calculation formula of the capacity Cu003d1*(K1I1+K2 (I2-I1),,,,,,, KN (IN-IN-1)]/LC: 250C rated discharge rate converted capacity (AH), ,,,,, UXL battery is 10HR capacity. L: Correction value used for capacity changes caused by changes in maintenance coefficients, service years, and service conditions. Generally, the value of L is 0.8. K: The capacity conversion time determined by the discharge time T, the minimum use temperature of the battery, and the minimum allowable voltage. I: Discharge current subscripts 1, 2,,,, N: Add to T, K, I3 in sequence according to the sequence of discharge current change, calculation example of capacity A, discharge current 140A (definite) B, discharge time 30 minutes C, lowest The battery temperature is -550CD, and the minimum allowable voltage is 1.6V/single cell. According to the above conditions, Ku003d1.1Cu003d1X1.1X140u003d192(AH/10HR)/0.8. Therefore, UXL220-2 can be used. Note: The above example is a simple load type battery capacity calculation for a certain discharge current. The amount of electricity or discharge time that a battery discharges under specified conditions (including discharge intensity, discharge current, and discharge termination voltage) is called battery capacity, in Ah or Amin. The car battery is a reversible DC power source, which can convert chemical energy into electrical energy and electrical energy into chemical energy. It is connected in parallel with a generator. During the start of the engine, it supplies power to the starting system and the ignition system. When the engine stops running or runs at low idle speed, it supplies power to the car's electrical equipment. When the electricity demand exceeds the output of the charging system, it will supply current for a limited period of time. The storage battery also absorbs the transient overvoltage in the circuit to keep the voltage of the automobile electrical system stable and protect the electronic components. If the battery is not used for a long time, it will slowly discharge by itself until it is scrapped. Therefore, you should start the car every time you press the time to charge the battery. Another way is to unplug the two electrodes from the battery. Note that the positive and negative electrode wires must be unplugged from the electrode column. The negative wire must be unplugged first, or the connection between the negative electrode and the chassis of the car must be removed. Then unplug the other end with the positive sign (+). The battery has a certain service life and must be replaced at a certain period of time. The above sequence should also be followed when replacing, but when connecting the electrode wires, the sequence is exactly the opposite, first connect the positive electrode, then the negative electrode. When the ammeter pointer shows that the battery is insufficient, charge it in time. The storage capacity of the battery can be reflected on the dashboard. Sometimes it is found that the battery is not enough on the road, and the engine cannot be started. As a temporary measure, you can ask other vehicles for help. Use the batteries on their vehicles to start the vehicle. Connect the negative and negative poles of the two batteries, and the positive and positive poles. . Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete.