Battery terminology helps users understand how batteries work and how to use them correctly. In this guide, we explain common battery terms in a simple and practical way. These definitions are useful for battery products, technical documents, and daily applications.
Basic Battery Terms
1. Chemical Power Source
A chemical power source converts chemical energy directly into electrical energy.
2. Primary Battery
A primary battery provides power through discharge only once. Users cannot recharge it after discharge.
3. Secondary Battery
A secondary battery works as a rechargeable battery. Users can recharge it after discharge and use it again.
4. Open-Circuit Voltage
Open-circuit voltage means the voltage between the positive and negative terminals when no external circuit is connected.
5. Load Voltage
Load voltage refers to the voltage between the two terminals while the battery delivers current to a device.
6. Nominal Voltage
Nominal voltage is the standard rated voltage of a battery under normal operating conditions.
7. End Voltage
End voltage is the specified voltage at which the battery stops discharging during a discharge test.
8. Nominal Capacity
Nominal capacity means the minimum electrical capacity that the battery should deliver under specified conditions.
9. Internal Resistance
Internal resistance is the resistance inside the battery between its two terminals.
Battery Performance Terms
10. Storage Life
Storage life is the period during which a battery can stay in storage under specified conditions and still keep its required performance.
11. Cycle Life
Cycle life means the number of charge and discharge cycles a rechargeable battery can complete before its performance drops below the required level.
12. Self-Discharge
Self-discharge refers to the capacity loss that happens while the battery remains charged or stored.
13. Discharge Rate
Discharge rate describes how fast the battery releases its rated capacity. Manufacturers usually express it as a C-rate.
14. Charge Rate
Charge rate describes how fast the battery receives charge compared with its rated capacity. It is also usually expressed as a C-rate.
15. Discharge Current
Discharge current means the amount of current the battery delivers during discharge.
Charging Methods
16. Constant Voltage Charging
Constant voltage charging keeps the charging voltage unchanged during the charging process.
17. Constant Current Charging
Constant current charging keeps the charging current unchanged during the charging process.
18. Trickle Charging
Trickle charging uses a small constant current to keep a fully charged battery near full capacity.
Battery Structure and Safety Terms
19. Leakage
Leakage happens when electrolyte escapes from the battery and appears on the outer surface or on parts that normally do not touch the electrolyte.
20. Battery Pack
A battery pack combines two or more cells or batteries in series or parallel to provide the required voltage and current.
21. Safety Valve
A safety valve releases gas automatically when the pressure inside the battery reaches a certain level.
Special Battery Term
22. Memory Effect
Memory effect happens when a battery repeatedly works within the same partial charge and discharge range for a long time. As a result, the battery may appear to remember that limited range and may no longer deliver its full rated capacity.
Conclusion
Understanding battery terminology can help users choose the right battery, improve battery performance, and use battery products more safely. These common battery terms also make technical communication clearer in battery design, production, and sales.
