General information
The new car is equipped with a maintenance-free battery that is completely sealed (except for a small ventilation hole in the lid), does not have vent plugs of battery cans and does not require maintenance (no need to add water to the battery electrolyte).
Table. Characteristics of standard batteries.
Engine | 2.0 l/2.4 l | 2.7 l |
Type | MF 60Ah | MF 68Ah |
Capacity (at least) 5 o'clock discharge 20-hour. discharge | 48 Ah 60 Ah | 55 Ah 68 Ah |
Peak current when scrolling knees. shaft starter | not less than 550 A | not less than 540 A |
Reserve capacity | 92 min. | 122 min. |
Note:
- Peak current when cranking the crankshaft with a starter - the current generated by the battery for 30 seconds at a voltage of 7.2 V and a temperature of 17.8°C.
- Reserve capacity - the time during which the battery can provide a current of 25 A at a voltage of 10.5 V and a temperature of 26.7°C.
Comprehensive battery check
1. Visually inspect for cracks or other damage to the battery case that could cause electrolyte leakage. Determine the cause of the defect and correct if necessary. Remove rust with a solution of baking soda and water.
- A) If the cause of the defect cannot be determined and eliminated, then replace the battery.
- b) If there are no cracks or other damage to the battery case, then check the electrolyte density.
2. Determine the density of the electrolyte in the battery and the correction for the temperature of the electrolyte, then correctly select the appropriate value from the following values.
- A) If the density is below 1.10 g/cm3, slowly charge the battery at 5 amps for up to 14 hours, then test the battery under load.
- b) If the density is within 1.10-1.22 g/cm3, recharge the battery. Pay special attention to the battery charging process and charging safety precautions.
- V) If the density is higher than 1.22 g/cm3, then test the battery under load.
3. Check the battery under load. To do this, turn on a load of 200 A for 15 seconds, measure the battery voltage and compare with the values below.
- A) If the voltage is higher than 9.6 V, then the battery is normal.
- b) If the voltage is between 6.5 - 9.6 V, quickly charge the battery and test the battery again under load.
Note: If the battery voltage remains less than 9.6V after performing the quick charge and load test again, the battery should be replaced.
- V) If the voltage is below 6.5 V, then the battery is defective and needs to be replaced.
Charging the battery
1. When the battery is being charged, flammable and explosive gas is released under the battery cover. Do not smoke or use naked flames near a battery that is being charged or has recently been charged.
2. Do not disconnect live circuits near battery terminals while charging. A spark may appear between disconnected wires (in a chain break) and cause an explosion. Keep flammable items away from open batteries.
Table. Battery charging time.
Battery electrolyte density | Charging Method | |
slow (current 5 A) | Fast (current 20 A) | |
Below 1.10 | 14 hours | 4.0 hours |
1,1-1,13 | 12 hours | 3.0 hours |
1,13-1,16 | 10 hours | 2.5 hours |
1,16-1,19 | 8 ocloc'k | 2.0 hours |
1,19-1,22 | 6 hours | 1,5 hour |
Above 1.22 | 4 hours | 1.0 hour |
Electrolyte Density Check
1. Checking the level and density of the electrolyte in a normal (serviced) battery.
- A) Check the electrolyte level, it should be between the minimum and maximum level marks. Add distilled water if necessary.
- b) Do not measure the density of the electrolyte with a hydrometer immediately after adding distilled water to the electrolyte. In order for the distilled water and electrolyte to mix and establish a uniform density, either slowly charge the battery for several minutes (current 5 A) battery, or leave the battery stationary for about one hour.
Note: If the electrolyte density is not within specifications after charging the battery, replace the battery.
- V) Using a hydrometer and thermometer, measure the density of the electrolyte in each battery cell.
- Rated value: 1.22-1.29 (at 20°C)
Note: With a fully charged battery, the density of the electrolyte should be 1.260-1.280 g/cm3 at 26.7°C.
- G) Determine the density difference between the battery banks. If any battery bank (one or more) electrolyte density differs from the average value by 50 points (0.05 g/cm3) or more, this is a sign of internal damage. In this case, the battery must be replaced.
2. Determination of density correction by electrolyte temperature.
- A) The density of the battery electrolyte changes with temperature. Heating dilutes the solution and reduces the density of the electrolyte. Cooling thickens the solution and increases the density of the electrolyte.
- b) If the actual temperature of the electrolyte deviates from the standard value, a correction must be introduced: 4 points must be added to the density value (0.004 g/cm3) for every 5.56°C above 26.7°C or subtract 4 points (0.004 g/cm3) for every 5.56°C of temperature less than 26.7°C.
EXAMPLE: A hydrometer shows a density value of 1.280 g/cm3 and a thermometer shows an electrolyte temperature of -12.2°C (10°F). According to the figure below, the measured density value should be reduced by 7 points (0.028 g/cm3).
Thus, the given density value of the electrolyte at 26.7°C will be 1.252 g/cm3.
1,280-0,028=1,252