My lithium battery multimeter has a voltage of 3.98 V. But it does not provide electricity when conn

Introduction My lithium battery multimeter has a voltage of 3.98 V. But it does not provide electricity when connected to electrical devices. For what ? Hello, the situation you mentioned is obviously that the lithium battery protection battery has failed.

My lithium battery multimeter has a voltage of 3.98 V. But it does not provide electricity when conn

Hello, what you are talking about is obviously that the lithium battery protection battery has failed. Battery cells are good.

Lithium batteries must be used with a protection circuit. Do not directly charge or discharge battery cells.

Most battery protection circuits can automatically recover after protection action. Some protection functions may need to be activated during charging actions.

Depending on your situation, this is an irrecoverable failure of the protection circuit and may require repair. If you have strong practical skills, you can find other lithium-ion batteries with broken cells. It may be enough to replace the same parts (both ICs) on the internal protection board and reinstall them, then use a charger to activate the circuit.

Although the importanceonomic is not great. But you can get a lot of pleasure from the practical process.

Battery internal resistance refers to the resistance to current flowing inside the battery when the battery is operating. It consists of two parts: the internal ohmic resistance and the internal polarization resistance. Large internal resistance of the battery will cause the battery discharge operating voltage to decrease and the discharge time to be shortened. Internal resistance is mainly affected by factors such as battery materials, manufacturing processes and battery structure. It is an important parameter to measure battery performance. Note: Generally, the internal resistance at the state of charge is used as a standard. To measure the internal resistance of the battery, you need to use a special internal resistance meter to measure it, and youWe cannot use the ohmic range of the multimeter to measure it.

The answer to this question is very confusing. Of course, we hope that the internal resistance of the battery is zero, like a superconductor.

Generally, the standard internal resistance of the lithium battery we use is: ≤70 mΩ.

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