(1) Capacity of starting battery
The capacity of a battery is the amount of power stored in the battery. There are 20h rate capacity, 5h rate capacity and reserve capacity to express the capacity of the starting battery. In the standards of different countries and automobile manufacturers, one or two methods are used to express the capacity. 20h rate capacity means that under standard conditions, the battery discharges at I=C/20 (I is the 20h rate discharge current, C is the 20h rate rated capacity) ampere current discharged to 10.5V (both refer to the rated voltage 12V starting battery) capacity. The reserve capacity refers to the number of minutes of the discharge time when the battery is discharged with a current of 25A under the standard state.
The conversion value and actual measured value of the 20h rate capacity and reserve capacity of the batteries produced by each company have a certain difference, which is caused by some factors such as the different production processes of each company and the different density of the electrolyte. In order to standardize the conversion between 20h rate capacity and reserve capacity, the conversion method is specified in the standard.
(2) Low temperature starting performance of starting battery
It refers to the performance of high current discharge of the battery under low temperature conditions. The standards of different countries and major companies are not the same.
(3) Charging acceptance ability of starting battery
The charge acceptance of the starting battery is a measure of the performance of the battery when it is charged, and the standards of each country and each enterprise are not the same.
(4) Charge retention capability
The charge retention capability is an index to measure the self-discharge performance.
(5) Electrolyte retention capacity
An indicator that measures the electrolyte cannot leak when the battery is tilted.
(6) Water loss test
Water loss is an index to measure the maintenance-free performance of the battery. The water loss is small and the maintenance-free performance is good. It is also called the water loss test.
(7) Vibration resistance test
The performance of the battery to resist vibration is generally tested on a vibration table. There are certain differences between the specific requirements of each standard. After vibration, check whether the battery is in good condition by discharging.
(8) Cycle durability
Cycle endurance performance is an indicator to measure battery life. The battery is discharged with the current specified by the standard to the time specified by the standard, and then charged with the current specified by the standard to the time specified by the standard. This is a cycle, and the cycle to the number of cycles specified by the standard is a cycle. After completing a cycle, the capacity inspection is carried out, and the qualified transfer Enter the next cycle and continue until the capacity inspection fails. The test methods are divided into various types according to different focuses, including floating charge life test, high temperature life test, percentage discharge depth cycle life test, heavy load life test, light load life test, etc.
(9) Dry charging performance
Dry charging performance is an index to measure the first starting performance of dry-charged batteries. After the accumulator is charged with acid, perform high current discharge and measure the discharge voltage for a specified time to reach the specified index.
