The performance of lithium batteries will decrease significantly at high temperatures and discharge rates. This is because when lithium-ion batteries are used under high temperature and current conditions, the positive active material and electrolyte decompose.
Inconsistent battery capacity will result in inconsistent depths of discharge of individual battery cells. Batteries with smaller capacity and poor performance will reach full charge sooner, preventing batteries with larger capacity and good performance from reaching full charge.
Inconsistency in battery voltage will cause individual cells in the parallel battery pack to charge each other. The higher voltage battery will charge the lower voltage battery, causing the battery's performance to fade faster and consume all of it. Loss of energy and capacityof the battery with a high self-discharge rate is important. Inconsistency in battery self-discharge rate will cause differences in battery state of charge and voltage, affecting battery performance.
Detailed information:
1. Lithium-ion batteries can be stored in a clean, dry, ventilated room with an ambient temperature of -5°C to 35°C and relative humidity not exceeding 75°C. %. Avoid contact with Keep away from contact with corrosive substances and fire and heat sources. The battery power remains between 30 and 50% of the nominal capacity.
2. To charge lithium-ion batteries, a dedicated lithium-ion battery charger must be used. Lithium-ion batteries are charged using the CC/CV (constant current + constant voltage) method, which means abord. charging with constant charging Charging is carried out with current, and when the voltage reaches 4.2 V*n, it switches to constant voltage charging, and charging stops when the current decreases to 0.01 C.
3. Do not heat the battery or throw it into water or fire. Putting the battery in water will cause battery failure. Ignition will cause the battery to rupture.
4. Do not disassemble the battery or try to penetrate the battery with sharp objects, as the electrolyte inside the battery will damage skin and clothing.
Baidu Encyclopedia - Lithium Battery
Baidu Encyclopedia - Series Connection
Charging two batteries in series is: connected end to end.
1. Lithium Batteries in Series:
This means that the lithium batteries are connected end to end. That is, the positive terminal of the first battery isconnected to the negative terminal of the second battery, the positive terminal of the second battery is connected to the negative terminal of the third battery, and so on. The series voltage is equal to the sum of the battery voltages and the current is equal to the current flowing through each battery. Damaging one section of the lithium battery will render the entire battery unusable or the voltage will decrease.
2. Working principle of batteries in series:
When several batteries are connected in series, their positive and negative terminals are connected to each other. The charge between the positive and negative terminals flows in the circuit. This flow creates an electrical current that can power devices that require external power.
3. Effect of batteries in series
The main effect of batteries in series is to increase summed voltage output. The voltage of each cell is the sum of the voltages en series. For example, if two 3V batteries are connected in series, the total output voltage will be 6V.
IV. Advantages and disadvantages:
When batteries are connected in series, each dry cell has an electromotive force and internal resistance, the advantages of dry cells connected in series are: can provide higher voltage. Disadvantages Yes: Its internal resistance is high, which affects the power and current it provides.
Applications of series batteries:
1. Car Starting System
Car starting systems typically use batteries in series to provide sufficient voltage to start the engine. Multiple batteries are connected in series to increase the total output voltage and provide enough power to start the car.
2. Solar power generation system
Solar power generation systemsgenerally use batteries connected in series to store and produce electrical energy converted from solar energy. Multiple cells are connected in series to increase the total output voltage and store enough power for nighttime use.
3. Drones
Drones typically use series-connected batteries as a power source. By connecting multiple batteries in series, drones can achieve longer flight times and higher performance.
4. Science Experiments
In science experiments, batteries in series are often used to provide a stable voltage source. Particularly in experiments requiring higher voltages, cells connected in series can provide the required output voltage.