How to Troubleshoot A Core Lithium Battery If It Can Not Be Fully Charged?

How to Troubleshoot A Core Lithium Battery If It Can Not Be Fully Charged?

By Renogy User Experience Team Feb 5th 2024

Why can't my Core lithium battery be fully charged? If you're into tech, dealing with a Core lithium battery that won't be fully charged can be a real pain, how to do the battery troubleshooting? Even with a fancy battery bank, you might run into this issue. If you're stuck with a Core lithium battery that just won't be fully charged, there are some easy tricks to try. Let's figure out why your power's acting up and what you can do about it.

This troubleshooting guide applies to the following products:

Why Can’t My Core Battery Be Fully Charged?

Unfortunately, when your Core lithium battery can not be fully charged, there could be a variety of reasons behind the problem. The issues might stem from a damaged battery or external factors unrelated to the lithium battery itself. It may require some trial and error as well as battery troubleshooting to uncover the underlying cause.

What Are The Factors Affecting Battery Being Fully Charged?

1. The battery is in low-temperature protection state, causing it not to charge fully.

2. Mismatch between the charging device parameters and the battery's charging parameters, resulting in the battery being unable to charge fully.

3. Malfunction of the charging equipment, causing the battery to be unable to charge fully.

4. The battery has exceeded its lifecycle or has been used for an extended period, leading to capacity decay.

5. Improper usage:

- The battery has been in an over-discharged state for an extended period without activation charging, resulting in battery damage and inability to charge fully.

- The load current exceeds the maximum continuous discharge current of the battery.

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Troubleshooting RV Battery Problems: A Step By Step Guide

1. Exclude the possibility of the battery being in BMS low-temperature protection state. Please check whether the ambient temperature around the battery is below 32°F.

------Possible Results------

YES: The battery is in BMS low-temperature protection state. Advise charging the battery in an environment above 32°F.

NO: Confirm the battery is not in BMS low-temperature protection state. Proceed to other steps.

2. Exclude the possibility of mismatched charging equipment and parameters. Check the charging parameters of the charger, referencing the provided image.

------Possible Results------

Positive: Charging parameters are incorrect or the charger is mismatched. Take appropriate measures.

Negative: Charger parameters match. Proceed to other steps.

parameter.png

3. Exclude charger malfunction. Please cross-validate by replacing either the battery or the charger.

------Possible Results------

Positive: Charger malfunction. Take appropriate measures.

Negative: Charger is normal. Proceed to other steps.

4. Confirm battery lifespan. Please try to accurately calculate the number of cycles and duration that the battery has been used.

------Possible Results------

Positive: The battery has exceeded the cycle life or warranty period. It can be determined as a normal battery degradation.

Negative: The battery has not exceeded the cycle life or warranty period. Please proceed to the remaining steps

If factors mentioned in steps 1, 2, 3, 4 are all ruled out, it can be determined as a product malfunction. Subsequently, based on the results of step 5, ascertain whether misuse or the battery's inherent quality issue caused the fault.

5. Clarifying the impact of human factors.

During the use and storage of batteries, it is crucial to avoid the following two situations:

  1. Prolonged deep discharge of the battery.
  2. Discharge current exceeding its maximum continuous discharge current.

Both of these situations can cause damage to the battery, defined as damage resulting from improper use.

Troubleshooting Video

For troubleshooting details about capacity degradation, charge/full-charge failure, communication issue, and heating function failure, refer to the troubleshooting video below:

 

Related Read

Note: When storing the battery, it should be charged to 30%-50%, and the battery should be charged every 3-6 months to prevent over-discharge. For specific details, please refer to the following link: Battery Storage and Maintenance Tips How to Store Lithium Batteries & Care of lithium batteries - Renogy United States

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