How to choose Battery Charger
Description
The battery charger is crucial to the use of the battery, affecting the life and safety of the battery, when choosing a lithium battery charger, the following key dimensions are available for reference:
1.Battery specification matching
1.1 Voltage
The output voltage of the charger must precisely match the rated voltage of the lithium battery. For example, a common 3.7V lithium-ion battery usually requires a charger of about 4.2V to charge,if the voltage is not matched, too high will cause the battery to overheat, bulge or even fire and explosion; Too low and the battery cannot be fully charged.
1.2 Capacity
The charging current of the charger should be commensurate with the battery capacity,generally speaking, the charging current is between 0.2C and 1C of the battery capacity,for example, for 100Ah lithium batteries, the current of the charger can be selected from 20A to 100A, high current charging can shorten the charging time, but may affect the battery life, small current charging is a longer charging time.
2.Charging technology
2.1 Constant current and constant voltage
Lithium battery charging is usually used first constant current and then constant voltage,the constant current stage can quickly replenish the battery, and the constant voltage stage can ensure that the battery is full and not charged, effectively protecting the battery.
2.2 Intelligent charging
The charger with intelligent charging function can automatically identify the battery status, adjust the charging strategy according to the battery power and temperature, avoid overcharge, overdischarge and overheating, and extend the battery life.
3.Safety performance
3.1 Protection function
A high-quality lithium battery charger should have a variety of protection functions, such as overvoltage protection, overcurrent protection, overheat protection, short circuit protection, etc,these protection functions can automatically cut off the power when there is an abnormal situation during the charging process to prevent battery damage and safety accidents.
3.2 Certification standard
Choose a charger that has passed the relevant safety certification, such as 3C certification, UL certification, etc,these certifications show that the charger meets certain safety and quality standards and is more reliable to use.
4.Charging speed
4.1 Fast Charging
If you have high requirements for charging speed, you can choose a charger that supports fast charging technology,for example, some mobile phone lithium battery chargers support fast charging protocols that can charge a large amount of battery power in a short period of time,however, it should be noted that fast charging may have a certain impact on battery life, and the battery and device must also support the corresponding fast charging protocol.
4.2 Normal Charging
For some devices with low charging speed requirements, such as Bluetooth headsets, smart watches, etc., ordinary charging speed chargers can meet the needs, and are relatively more conducive to protecting battery life.
5.Brand and quality
5.1 Market reputation
Choose well-known brands of chargers, these brands usually have strict standards in research and development, production process and quality control, product quality is more reliable, and after-sales service is more perfect,you can learn about your brand’s reputation by checking product reviews and consulting others.
5.2 Durability
High-quality chargers use high-quality electronic components and housing materials, with good durability, can withstand the daily use of plugging, moving and other operations, not easy to fail.