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1、 Basic concepts and structures of ternary lithium batteries
Ternary lithium battery is a high-performance lithium-ion battery with advantages such as high energy density, long cycle life, and good safety performance. It is widely used in fields such as electric vehicles and energy storage systems. A ternary lithium battery consists of a positive electrode, a negative electrode, and an electrolyte. The positive electrode material mainly uses lithium manganese oxide, ternary materials, or lithium cobalt oxide.
2、 Definition of Short Circuit Current
Short circuit current refers to the maximum output current of a battery in the event of an extreme short circuit. Short circuit current is commonly used to describe the safety performance and output capability of a battery.
3、 Calculation method for short-circuit current of ternary lithium batteries
The short-circuit current of ternary lithium batteries is related to the internal resistance and maximum charge/discharge rate of the battery. The specific calculation method is as follows:
Firstly, it is necessary to measure the internal resistance value of the battery. It can be measured using a digital multimeter or a battery internal resistance tester.
2. Determine the maximum charge/discharge rate of the battery. The maximum charge/discharge rate refers to the maximum discharge current of a battery during the charging and discharging process.
3. Finally, use the following formula to calculate the short-circuit current of the ternary lithium battery:
Short circuit current=battery voltage/battery internal resistance
For example, if the voltage of a ternary lithium battery is 3.7V, the internal resistance is 0.05 ohms, and the maximum charge/discharge rate is 5C, then the short-circuit current is:
Short circuit current=3.7V/0.05 ohms=74A
It should be noted that short-circuit current is a dangerous signal, and once a short circuit occurs, the level of short-circuit current will directly affect the degree of battery damage. Therefore, in practical applications, measures must be taken to prevent the occurrence of short circuit accidents.
【 Conclusion 】
Ternary lithium batteries are high-performance batteries that can provide high short-circuit currents, but this also means that the battery may suffer significant damage in the event of a short circuit. Therefore, necessary safety measures must be taken during production and use to ensure the safety and stability of the battery. Meanwhile, accurately measuring the short-circuit current of the battery can help improve its efficiency and performance.

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