Crown Crown Battery 12C85-13 12C85-13

This is the complete recharge of a battery after it has been fully or partially discharged during normal operation. In general, a cycle charge is based on an 8‐hour charging cycles, but can be extended, depending on need

A freshening charge is used to bring a battery to a fully charged condition before it is placed in service or when it has been standing idle for a short period. It takes about three hours at the finish charge rate (3‐6 amperes per 100‐ampere hours of the battery’s 6‐hour capacity rating)

When a battery is placed on charge, the opposite action of battery discharging takes place; the sulfate in the active material of the plates is driven back into the electrolyte

This reduces the sulfate in the plates and increases the specific gravity of the electrolyte and the electrochemical process continues until the on-charge cell voltages reach 2.50 to 2.70 volts per cell, depending on the type of charging equipment used

Finish rate or "normal" rate is that current which can be used safely any time charging is required and which can be continued after the completion of the charge without causing excessive gassing or high temperature resulting from overcharge. The finish rate is shown on the nameplate of Crown Batteries

Generally, the finish rate is 3.5 amperes per 100 hours of the battery's 6-hour rated capacity. A partially or completely discharged battery can safely handle currents much higher than the finish rate, but as it approaches full charge, whatever charging rate is used must be reduced to the finish rate

Opportunity/ Opportunity Fast Charge battery procedure

Enter the current charge of the battery in amperes

Opportunity charge is generally between 25-30 amperes per 100 ampere hour

Opportunity Fast Charge is generally 45-55 amperes per 100 ampere hour

Is the battery operating between 20% and 80% of its state of charge?

If the charger is rated higher than the connector on the battery, battery modifications will be needed.

The battery recording device allows the manufacturer and the user to diagnose problems and to correct and fine tune the operating system.

Each cell of a battery has slight differences in uniformity of construction and content. These differences cause some cells to take less charge than the other cells in the battery. After a while the state of charge of the cells, which require more charge than the others will drift back in capacity and the battery will not deliver its full capacity

To bring the cells with a lower state of charge up to the same level as the others, the battery is given an "equalizing charge". The cells with a higher state of charge will be somewhat overcharged in order to bring the cells with a below normal state of charge up to full charge

The recommended frequency of equalization is dependent upon how often the batteries are cycled and the depth of the cycles. The frequency of equalization can dramatically affect the operational costs of the vehicle

Unnecessary equalizing charges, in addition to consuming electricity, can result in significant loss of battery life caused by overcharge. The following examples will give you a good idea of a reasonable battery-equalizing schedule for a specific battery operation

1. For batteries that are cycled only once or twice a week to an average depth of 30%-60%, a monthly equalizing charge is sufficient to keep them fully charged

2. Batteries that are discharged regularly- three or more cycles per week and to an average discharge depth of 60%-80% of their rating- can be kept healthy by equalizing them every two months

3. Batteries that are cycled four to eight times a month at any dept require equalizing about every month to keep them in a healthy condition

4. Batteries that are cycled five or more times a week at an average discharge of 60%‐80% may not need equalizing charges unless stored;

CAUTION: ONLY EXPERIENCED PERSONNEL SHOULD ATTEMPT BATTERY REPAIRS! ALWAYS WEAR SAFETY GLASSES AND A FACE SHIELD WHEN WORKING ON OR NEAR BATTERIES

If you don't have an experienced battery repair person, send the battery to your nearest authorized Crown Battery repair facility or arrange to have a Crown Battery service technician perform the repairs at your plant site

BEFORE PERFORMING ANY REPAIRS, REMOVE THE BATTERY FROM THE LIFT TRUCK.

Warning: This test requires trained personnel with PPE!

Specific gravities at manufacturers specifications?

If not, adjust them accordingly

Battery cooled down to 75°F to 85°F?

Battery discharged within 24 hours of completion of charging and acid adjustment?

Any dead cells taken out of circuit?