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BQ27520EVM: battery SOC suddenly drops to 0 |
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Hello technical support: At present, we have successfully learned the battery charge curve on the bq27520evm. Were also strictly according to the learning cycle document and get the dffs with STATUS = 2. When we use the EVM to test the accuracy of the battery charge curve , we found that if we use a larger load (2A) , the SOC will directly jump value to 0 from a large value . The watch log is shown in the figure below. The log and ggfile of the whole process are also provided in the attachment, please help to check this problem. Thanks ! 200423.rar |
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We will take a look and get back to you. Andy |
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I see in your gg file, the chemistry id 3359 is used. It is for a battery that operates from 4.35V to 3.0V. Did you use the GPCCHEM tool to find out this chemistry id? Can I see your GPC report? Also, did you see the same issue when you did the learning cycle? Thanks. Andy |
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Hi andy, Thank you for your review and reply! I have used the GPC tool to conduct two chemical ID evaluations. One of the original data was generated by the battery manufacturer |
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Yes, you can increase the rate so that we need to be above 0.1 C for learning cycle. |
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