Apparatus for controlling battery pack, and energy storage system including the apparatus
First Claim
1. An apparatus for controlling a battery pack which comprises at least one battery tray each comprising one or more battery cells, the apparatus comprising:
- an open circuit voltage (OCV) calculator configured to receive OCV measurement values of the battery cells of each battery tray when the power of the battery pack is turned on, and calculate a final OCV of the battery cells based at least in part on the OCV measurement values; and
a state of charge (SOC) estimator configured to extract an SOC value corresponding to the final OCV from an SOCwherein the SOC table contains SOC values with respect to the temperature of the battery cells and the SOC of the battery cells according to an OCV over time, andfurther comprising a sampler configured to select a predetermined number of battery cells from the total number of the battery cells,wherein the OCV calculator is configured to calculate an average of OCVs of the selected battery cells and multiply the calculated OCV average by the total number of the battery cells table and estimate the extracted SOC value as an initial SOC.
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Accused Products
Abstract
An apparatus for controlling a battery pack and an energy storage system including the apparatus are disclosed. In one embodiment, the battery pack includes at least one battery tray each including one or more battery cells. The apparatus may include an open circuit voltage (OCV) calculator and a state of charge (SOC) estimator. The OCV calculator may receive OCV measurement values of the battery cells of each battery tray when the power of the battery pack is turned on, and calculate a final OCV of the battery cells based at least in part on the OCV measurement values. The SOC estimator may extract an SOC value corresponding to the final OCV from an SOC table and estimate the extracted SOC value as an initial SOC.
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Citations
19 Claims
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1. An apparatus for controlling a battery pack which comprises at least one battery tray each comprising one or more battery cells, the apparatus comprising:
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an open circuit voltage (OCV) calculator configured to receive OCV measurement values of the battery cells of each battery tray when the power of the battery pack is turned on, and calculate a final OCV of the battery cells based at least in part on the OCV measurement values; and a state of charge (SOC) estimator configured to extract an SOC value corresponding to the final OCV from an SOC wherein the SOC table contains SOC values with respect to the temperature of the battery cells and the SOC of the battery cells according to an OCV over time, and further comprising a sampler configured to select a predetermined number of battery cells from the total number of the battery cells, wherein the OCV calculator is configured to calculate an average of OCVs of the selected battery cells and multiply the calculated OCV average by the total number of the battery cells table and estimate the extracted SOC value as an initial SOC. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An energy storage system comprising:
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a battery pack which comprises at least one battery tray each comprising one or more battery cells, wherein the battery tray is configured to supply power to at least one of a load and a grid system; an open circuit voltage (OCV) calculator configured to receive OCV measurement values of the battery cells of each battery tray when the power of the battery pack is turned on, and calculate a final OCV of the battery cells based at least in part on the OCV measurement values; and a state of charge (SOC) estimator configured to extract an SOC value corresponding to the final OCV from an SOC wherein the SOC table contains SOC values with respect to the temperature of the battery cells and the SOC of the battery cells according to an OCV over time, and further comprising a sampler configured to select a predetermined number of battery cells from the total number of the battery cells, wherein the OCV calculator is configured to calculate an average of OCVs of the selected battery cells and multiply the calculated OCV average by the total number of the battery cells table and estimate the extracted SOC value as an initial SOC. - View Dependent Claims (14, 15, 16, 17)
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18. A processor-readable storage device having processor-readable code embodied on the processor-readable storage device, the processor-readable code for programming one or more processors to perform a method of controlling a battery back which comprises at least one battery tray each comprising one or more battery cells, the method comprising:
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receiving OCV measurement values of the battery cells of each battery tray when the power of the battery pack is turned on, and calculate a final OCV of the battery cells based at least in part on the OCV measurement values; and extracting an SOC value corresponding to the final OCV from an SOC table and estimate the extracted SOC wherein the SOC table contains SOC values with respect to the temperature of the battery cells and the SOC of the battery cells according to an OCV over time, and further comprising a sampler configured to select a predetermined number of battery cells from the total number of the battery cells, wherein the OCV calculator is configured to calculate an average of OCVs of the selected battery cells and multiply the calculated OCV average by the total number of the battery cells value as an initial SOC.
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19. An apparatus for controlling a battery pack which comprises a plurality of battery cells, the apparatus comprising:
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an open circuit voltage (OCV) calculator configured to calculate an OCV of the battery cells based at least in part on OCV measurement values of the battery cells that are obtained when the power of the battery pack is turned on; a memory storing at least one of a previous SOC storage time and a reference battery current; and a state of charge (SOC) estimator configured to estimate an initial SOC for the battery cells based at least in part on i) the calculated OCV and ii) at least one of the previous SOC storage time and reference battery current wherein the SOC table contains SOC values with respect to the temperature of the battery cells and the SOC of the battery cells according to an OCV over time, and further comprising a sampler configured to select a predetermined number of battery cells from the total number of the battery cells, wherein the OCV calculator is configured to calculate an average of OCVs of the selected battery cells and multiply the calculated OCV average by the total number of the battery cells.
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Specification