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US 12,586,827 B2Granted
Battery management apparatus, battery management method and battery pack
AssigneeLG Energy Solution, Ltd.
InventorBo-Mi Lim
Life of this patent
Estimating the term…
Abstract
There are provided a battery management apparatus, a battery management method and a battery pack. The battery management apparatus sets at least one of a plurality of external variables as a valid external variable for each internal variable using a plurality of observational data sets associated with the external variables that can be observed outside a battery cell and a plurality of desired data sets associated with the internal variables that are unobservable outside the battery cell. The observational data set associated with respective valid external variable is used for the machine learning of sub-multilayer perceptron necessary to estimate respective internal variable.
Claims18
A battery management apparatus for use with a battery cell, comprising:
- a memory configured to store a first to a pth observational data sets and a first to an nth desired data sets, wherein each of the p and the n is an integer equal to 2 or greater, the first to the pth observational data sets are respectively associated with p external variables that are observable outside the battery cell, and the p in the p external variables is the same integer as the p in the first to the pth observational data set;
- a control circuit operably coupled to the memory;
- a sensing circuit operably coupled to the control circuit and configured to measure a sensing data for the battery cell associated with at least one of the p external variables and to provide the sensing data to the control circuit;
- and
- a switch coupled between a positive terminal of the battery cell and a positive power terminal or between a negative terminal of the battery cell and a negative power terminal,
- wherein each of the first to the pth observational data sets includes a predetermined number of input values,
- wherein the first to the nth desired data sets are associated with a first to an nth internal variables, respectively, wherein the first to the nth internal variables are dependent on an internal chemical state of the battery cell and unobservable outside the battery cell, and the n in the first to the nth internal variables is the same integer as the n in the first to the nth desired data sets,
- wherein each of the first to the nth desired data sets includes the same number of target values as the predetermined number of input values, and
- wherein the control circuit is configured to:
- set m observational data sets extracted by data filtering from the first to the pth observational data sets as a first to an mth input data sets, wherein the m in the m observational data sets and the m in the first to the mth input data sets are a same integer greater than or equal to 1 and smaller than or equal to the p, and
- set at least one of a first to an mth external variables, among the p external variables, as a valid external variable for each of the first to the nth internal variables based on the first to the mth input data sets and the first to the nth desired data sets, the m in the first to the mth external variables being the same integer as the m in the m observational data sets,
- wherein the first to the mth external variables, among the p external variables, are associated with the m observational data sets, and
- wherein the control circuit is further configured to determine a value of the at least one of the p external variables based on the sensing data, to determine an estimated value of at least one of the first to the nth internal variables based on the value of the at least one of the p external variables, and to control the switch into an open or closed operating state to control charging or discharging of the battery cell based on whether the estimated value of the at least one of the first to the nth internal variables is outside a predetermined safety range.
10 more elements
A battery management method for use with a battery cell connected between a positive power terminal and a negative power terminal via a switch, comprising:
- storing a first to a pth observational data sets and a first to an nth desired data sets in a memory, wherein:
- each of the p and the n is an integer equal to 2 or greater,
- the first to the pth observational data sets are respectively associated with p external variables that are observable outside the battery cell, the p in the p external variables being the same integer as the p in the first to the pth observational data set,
- each of the first to the pth observational data sets includes a predetermined number of input values,
- the first to the nth desired data sets are respectively associated with a first to an nth internal variables that are unobservable outside the battery cell, the first to the nth internal variables being dependent on an internal chemical state of the battery cell, and the n in the first to the nth internal variables being the same integer as the n in the first to the nth desired data sets, and
- each of the first to the nth desired data sets includes the same number of target values as the predetermined number of input values;
- setting m observational data sets extracted by data filtering from the first to the pth observational data sets as a first to an mth input data sets, wherein the m in the m observational data sets and the m in the first to the mth input data sets are a same integer greater than or equal to 1 and smaller than or equal to the p;
- setting at least one of a first to an mth external variables, among the p external variables, as a valid external variable for each of the first to the nth internal variables based on the first to the mth input data sets and the first to the nth desired data sets, the m in the first to the mth external variables being the same integer as the m in the m observational data sets;
- measuring a sensing data for the battery cell associated with at least one of the p external variables;
- determining a value of the at least one of the p external variables based on the sensing data;
- determining an estimated value of at least one of the first to the nth internal variables based on the value of the at least one of the p external variables;
- and
- controlling the switch into an open or closed operating state to control charging or discharging of the battery cell based on whether the estimated value of the at least one of the first to the nth internal variables is outside a predetermined safety range,
- wherein the first to the mth external variables, among the first to the pth external variables, are associated with the m observational data sets.
11 more elements
Dependencies are inferred from the claim text.