SOH is a relative concept, usually expressed as a percentage, that is, the relative state of battery health relative to the new battery. It represents the current state of the battery, including its capacity and available energy.
The definition and application of SOH vary from industry to industry, but it usually involves the performance and reliability of batteries.
In the battery industry, SOH is widely used to evaluate the life and performance degradation of batteries. For example, in the field of electric vehicles, SOH is used to evaluate the endurance and charging times of batteries, as well as the health and life of batteries. In the power industry, SOH is used to evaluate the capacity and available energy of the battery to ensure that the battery can meet the needs of the system.
The evaluation method of SOH varies according to the battery type and use.
1. For lithium-ion batteries, SOH can be evaluated by measuring the voltage, current and temperature of the battery. In addition, SOH can also be evaluated by battery capacity, internal resistance and self-discharge rate.
2. For lead-acid batteries, SOH can be evaluated by measuring the voltage and internal resistance of the battery. In addition, some manufacturers will provide special measuring equipment or algorithms to evaluate SOH.
The importance of SOH is that it can predict battery life and performance degradation. If the SOH is too low, the battery may not meet the needs of the system and needs to be replaced or repaired. In addition, SOH can also be used to guide the charging and discharging mode of the battery, thus prolonging the life and performance of the battery.
In a word, SOH is an important parameter to evaluate the health and life state of batteries, which can predict the life and performance degradation of batteries. SOH has a wide range of applications, including battery industry, power supply industry, electric vehicles and other fields. Understanding the meaning and application of SOH is very important for the correct use and maintenance of batteries.