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For example, lithium ion battery typically employed a CC/CV (constant-current, constant-voltage) charging method. At a low voltage, less than 3.0V, the battery is being trickle charged at a low current (one-tenth of the normal charging current).
An emulator is ideal for testing each phase of the charging cycle as well as testing transitions between phases. By adjusting the voltage knob, the battery emulator allows easy back-and-forth phase transition testing. Battery emulator/simulator is often used to test the charger’s operation over the entire battery voltage range (e.g. 0V to 4.2V). For example, a lithium-ion battery’s mario party 4 download normal operating voltage is 3.0V to 4.2V, but the voltage also can be 0V to 3.0V, if it is deeply discharged. Likewise a lithium ion battery can also be over charged to 4.3V – 4.5V.
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The charger circuit must be tested to ensure that it can charge a battery at any voltage within the limit. Using a simulator, you can easily simulate the battery at any voltage by adjusting the knob.
For voltage between 3.0V and ~4.2V, it is being charged at a rapid charging current. When the battery voltage reached 4.2V, it enters constant voltage mode where the voltage is held constant, but the charging current is slowly reduced. Figure 6 shows the detailed CC/CV lithium ion battery charging profile.
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- We may think that Device Labs are the only option you have for mobile testing.
- The memory on the simulator or emulator is enormous and far large when compared to the real devices whereas in the real devices they are much lesser.
- In the real device, the tester has to test everything in all real-time scenarios for mobile applications.
- This post clearly wipes out the conventional thinking of not using the mobile emulators and go for physical devices.
- When the tester is not sure about the mobile devices which have to be used and how to invest in testing it creates the problem, so for people who have budgeted limit can go with emulator or simulator.
You can measure the charging current at low battery voltage, less than 3V for Li+ battery, normal voltage 3V to ~4.2V, and high voltage greater than 4.2V, to verify against its specifications. While charging, adjust the lithium ion simulator knob to simulate the entire voltage range. Look for any unusual charging behaviors such as oscillation as you are charging. Figure 3 shows a typical battery simulator test equipment connection for testing chargers. The TS250 and the TS200 modulated power supply can mimic sink and source current the same way a real battery does.