What does the battery soc mean, and the SOC calculation formula method for the remaining capacity of the lithium battery? ?What does the battery soc mean, and the SOC calculation formula method for the remaining capacity of the lithium battery? ?What does the battery soc mean, and the SOC calculation formula method for the remaining capacity of the lithium battery? ?What does the battery soc mean, and the SOC calculation formula method for the remaining capacity of the lithium battery? ?What does the battery soc mean, and the SOC calculation formula method for the remaining capacity of the lithium battery? ?What does the battery soc mean, and the SOC calculation formula method for the remaining capacity of the lithium battery? ?