BQ34Z100-G1: Energy Rollover during charge

Renan Warrick70

Part Number: BQ34Z100-G1

Hi,

We use golden image 25.6V 64Ah for Li-Ion battery with chemical 0463 validated by supplier on BQ34Z100-G1 and are faced to energy rollover.

we use current scale of 4 and design energy scale of 2 as design capacity is divided by 4 so 16Ah and design energy is 25600mWh= 3.2V x 16000ma / 2.

As you can see in attached file, especially on "end of charge GI" file, as the SOC is going to 100% we have huge gap on Available Energy and Remaining capacity.w

we noticed with this GIO that during first start, SOC was 70% instead he was supposed to be 95%.

Could you please help us as this problem stuck some products in our clients hands.

Many thanks

Renan

HET_LiFe_25.6V_64Ah_GI.zip

over 6 years ago

0 Bryan Kahler over 6 years ago

TI__Mastermind 25955 points

Hi Renan,

With a current scale of 4 the battery should now be 16000 mAh. Please ensure that all values with A or W in them are scaled by the current scale of 4. At this point, set energy scale to 2 and ensure that the values in Table 15 of the datasheet are scaled by this additional factor of 2.

After this, please modify the gg.csv file by hand to set update status = 0x00, import the gg file, set IT_ENABLE (changes update status to 0x04) and run a learning cycle. At the end of the learning cycle, update status should be 0x06.

Sincerely,
Bryan Kahler

0 Renan Warrick70 over 6 years ago in reply to Bryan Kahler

Prodigy 170 points

Hi Bryan,

Thanks for your prompt reply.

Is it possible to create a GI with urrent scaled then once created, change energy scale and energy to 16000mAh.

Sincerely

Renan

0 Batt over 6 years ago in reply to Renan Warrick70

TI__Mastermind 42535 points

No, learn it with everything set when you start out.

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BQ34Z100-G1: Energy Rollover during charge