Lithium Battery Technology Fundamentals:   Understand how lithium batteries store and release electrical energy. Learn the basic construction of lithium-ion cells, including the anode, cathode, separator, electrolyte, and current collectors. Study the differences between common lithium battery chemistries, including lithium-ion and LiFePO4. Understand nominal voltage, capacity measured in ampere-hours (Ah), energy measured in watt-hours (Wh), charge and discharge rates, and the factors that influence battery performance.

Battery Cell Types and Identification:  Learn about cylindrical, prismatic, and pouch lithium battery cells. Understand how their physical construction, specifications, and applications differ. Learn to read cell labels and datasheets, identify nominal voltage and capacity ratings, and understand the importance of matching cell specifications to the intended battery pack. Study the differences between individual cells, modules, and complete battery packs.

Battery Voltage and Capacity Testing:  Learn the fundamentals of checking battery voltage and interpreting test readings. Understand the difference between open-circuit voltage, loaded voltage, and usable battery capacity. Explore suitable testing equipment and controlled charge-discharge testing concepts. Learn how to recognize abnormal voltage readings and understand why voltage alone cannot establish the complete health or remaining capacity of a battery.

Battery Management System (BMS):  Understand the role of a Battery Management System in monitoring and protecting lithium battery packs. Study cell-voltage monitoring, current monitoring, temperature monitoring, overcharge protection, over-discharge protection, overcurrent protection, and short-circuit protection. Learn about cell balancing, protection cutoffs, fault indicators, and the importance of using a compatible BMS for the battery chemistry and pack configuration.

Lithium Battery Pack Configuration:  Learn the fundamentals of series and parallel battery connections. Understand how series connections affect pack voltage and how parallel connections affect capacity and current capability. Study the relationship between cell ratings, pack voltage, total capacity, and energy. Learn why compatible cells, appropriate interconnections, suitable insulation, and properly rated protection systems are essential when designing or evaluating a battery pack.

Battery Charging and Discharging Systems:  Understand lithium battery charging principles and the importance of using chargers designed for the specific battery chemistry and configuration. Study charging stages, charging voltage, current limits, discharge limits, and temperature considerations. Learn about common charging problems, including batteries that do not accept a charge, chargers that stop unexpectedly, and protection systems that interrupt charging. Explore how to distinguish charger-related problems from possible battery or BMS faults.

Battery Internal Resistance and Health Evaluation:  Learn how internal resistance can affect voltage drop, heat generation, and battery performance under load. Understand how appropriate testing equipment can help compare cell performance and identify potential weak cells. Study the difference between voltage imbalance, reduced capacity, increased internal resistance, and other signs of battery degradation. Learn why reliable battery health assessment requires suitable testing methods rather than relying on a single measurement.

Cell Balancing and Voltage Imbalance:  Understand why individual cells in a battery pack may develop different voltage levels over time. Learn the basic principles of passive and active cell balancing and the role of balancing circuits in battery management. Study how imbalance can affect usable capacity and trigger protective cutoffs. Learn how to interpret imbalance-related symptoms and identify when a pack requires professional inspection or further testing.

Common Lithium Battery Problems:  Study common battery complaints, such as a battery not charging, unexpectedly shutting down, delivering reduced backup time, showing abnormal voltage readings, or triggering a BMS protection event. Learn a systematic diagnostic approach that considers the charger, connectors, wiring, cell condition, temperature sensors, and protection electronics. Understand the difference between symptoms and confirmed faults, and why damaged or unsafe battery packs require appropriate isolation and assessment.

Battery Pack Connections and Electrical Components:  Learn about the purpose of battery terminals, connectors, busbars, fuses, wiring, insulation, temperature sensors, and protective components. Understand the importance of correct component ratings, secure connections, and resistance to unwanted heating. Study common connection-related problems and the principles of inspecting battery packs for visible damage, corrosion, loose connections, or signs of overheating.

Battery Testing Equipment and Diagnostic Tools:  Understand the applications and limitations of digital multimeters, battery analysers, capacity testers, electronic loads, thermal monitoring equipment, and suitable BMS diagnostic tools. Learn how to select appropriate equipment for a particular battery system and interpret measurements correctly. Understand why testing lithium batteries requires equipment with suitable voltage, current, and power ratings.

Solar, Inverter and Energy Storage Batteries:  Explore how lithium battery packs are used in solar energy storage, inverter backup systems, UPS applications, and other stationary energy storage systems. Learn about battery voltage compatibility, charging control, inverter communication, BMS integration, and system protection. Understand the importance of matching the battery, charger, inverter, and protection equipment to their specified operating requirements.

Electric Vehicle Battery Fundamentals:  Understand the role of lithium battery packs in electric scooters, motorcycles, cars, and other electric mobility applications. Learn about battery modules, pack voltage, capacity, BMS monitoring, temperature management, and electrical protection. Explore common battery performance concerns and the diagnostic considerations involved in electric vehicle battery servicing. High-voltage traction batteries require specialized training, equipment, and safety procedures.

Battery Safety and Handling Procedures:  Learn the essential safety principles involved in handling lithium battery cells and packs. Understand the risks associated with short circuits, excessive charging or discharging, mechanical damage, overheating, and thermal runaway. Study safe work areas, appropriate personal protective equipment, insulated tools, terminal protection, and procedures for dealing with damaged batteries. Understand why swollen, leaking, punctured, overheated, or otherwise compromised batteries must not be treated as ordinary repair jobs.

Battery Maintenance and Performance Monitoring:  Learn the factors that influence battery lifespan, including temperature, charging conditions, discharge depth, storage conditions, and operating load. Understand how battery monitoring data can help identify changes in performance over time. Study appropriate maintenance practices, inspection records, and basic methods of evaluating whether a battery remains suitable for its intended application.