28 views Yuda Electronic (HK) Technology Co.,Limited. 2020-03-10
Before the battery charger is officially put on the market, various tests will be performed, such as discharge test and charge test. Today phone charger wholesale supplier will take a look at the battery charger and battery test measurement!
First, battery charger test
The rechargeable battery needs a charger to charge after discharging. A good charger should be able to provide a constant current to charge, and it can automatically stop charging when the battery is full so as to maximize the battery life.
During the charging process, when the battery terminal voltage starts to drop (-△ V negative voltage slope), the battery charger should stop charging, and overcharging the battery will cause permanent damage to the battery. When testing a battery charger, you can use a real rechargeable battery test, but this method takes a very long time, is impractical or not economical. When using an electronic load, it can be set to a constant voltage load mode and set the required terminal voltage. At this time, the electronic load will draw enough current to control the voltage to stabilize to the set value. For example: test the 1.2V rechargeable battery set terminal voltage from 1V, 1.2V, 1.4V, 1.5V to test the current adjustment rate of the battery charger, and then set 1.48V (-△ V analog battery is sufficient) to test the charger Whether it will stop charging.
Second. Battery discharge test
Any battery can be regarded as a voltage source, and its storage capacity unit is mAH or AH. For example, the battery capacity of 12V 6AH means that it can work for six hours at 12V and 1A output.
When testing the discharge characteristics of a battery, the constant current mode of the electronic load should be used, and the battery should provide the test current within the required voltage range within the specified time. Use a computer or printer to monitor the battery voltage and current.
The constant power mode can also be used to test the discharge characteristics of the battery. When the electronic load works in the constant power mode, the electronic load will draw the set power value from the battery. At this time, the current of the electronic load will automatically increase as the load voltage decreases to keep the power constant.
Third, battery charging test
Generally, a DC power supply with constant voltage and constant current output can be used to charge a rechargeable battery, or a DC power supply without a regulated current limit (such as a simple rectifier and capacitor filter circuit) is connected in series with a DC electronic load as a current source to charge the battery. At this time, the charging current is determined by the set current value in the constant current mode of the electronic load.
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