Abstract: An available input-output power estimating device for a secondary battery includes a parameter estimating section substituting a measured current value I and a measured voltage value V into an adaptive digital filter using an equivalent circuit model of the secondary battery for thereby collectively estimating values of parameters in the equivalent circuit model, an open circuit voltage calculator substituting I, V, and the estimated parameter values into the equivalent circuit model for calculating an open circuit voltage {circumflex over (V)}0, an available input power estimating section estimating an available input power Pin of the secondary battery using components (ân,{circumflex over (b)}n), associated with a direct term in the equivalent circuit model, in the estimated parameters, the open circuit voltage estimate value {circumflex over (V)}0 and an upper limit voltage Vmax of the terminal voltage, and an available output power estimating section estimating an available output power Pout for the secon

Abstract: For estimation of a critical state of a performance under a working condition of a secondary cell, in consideration of an internal resistance of the cell, a variable data provider provides variable data on the performance, including a first data on a variant of the performance, a second data on a current of the cell, and an estimated third data on a dynamic characteristic of the internal resistance, a specified data provider provides specified data on the cell, including a fourth data on a permissible range of the variant under the prescribed working condition, and exact data on the dynamic characteristic, and a critical state estimator processes the variable and specified data for estimation of the critical state, and has an internal resistance setter to process the second and third data to set exact data as a function of second data defining the dynamic characteristic, and an estimating element to process the first, fourth, and exact data to estimate the critical state.

Abstract: In charge rate estimating apparatus and method for a secondary cell, a current flowing through the secondary cell is measured, a voltage across terminals of the secondary cell is measured, an adaptive digital filtering is carried out using a cell model in a continuous time series shown in an equation (1), all of parameters at one time are estimated, the parameters corresponding to an open-circuit voltage which is an offset term of the equation (1) and coefficients of A(s), B(s), and C(s) which are transient terms, and, the charge rate is estimated from a relationship between a previously derived open-circuit voltage V0 and the charge rate SOC using the open-circuit voltage V0, V = B ? ( s ) A ? ( s ) · I + 1 C ? ( s ) · V 0 , ( 1 ) wherein s denotes a Laplace transform operator, A(s), B(s), and C(s) denote poly-nominal functions of s.

Abstract: In input and output enabling power estimating apparatus and method for a secondary cell, an input enabling power (Pin) of the secondary cell is estimated on the basis of parameter estimated values (?) and an open-circuit voltage (Vo), and an output enabling power (Pout) of the secondary cell is estimated on the basis of the parameter estimated values and the open-circuit voltage (Vo), the parameters are integrally estimated from at least one of equations (1) and (2): V = B ? ( s ) A ? ( s ) ? • ? ? I + 1 C ? ( s ) ? • ? ? Vo , ? wherein ? ? A ? ( s ) = ? k = 0 n ? a k ? • ? ? s k , B ? ( s ) = ? k = 0 n ? b k ? • ? ? s k , C ? ( s ) = ? k = 0 n ? c k ? • ? ? s k , ( 1 ) s denotes a Laplace transform operator, A(s), B(s), and C(s) denote each poly-nominal of s (n denotes degrees), a1?0, b1?0, and c1?0 and V = B ? ( s ) A ? ( s ) ? • ? ? I + 1 A ? ( s ) ? • ?

Abstract: An available input-output power estimating device for a secondary battery includes a parameter estimating section substituting a measured current value I and a measured voltage value V into an adaptive digital filter using an equivalent circuit model of the secondary battery for thereby collectively estimating values of parameters in the equivalent circuit model, an open circuit voltage calculator substituting I, V, and the estimated parameter values into the equivalent circuit model for calculating an open circuit voltage {circumflex over (V)}0, an available input power estimating section estimating an available input power Pin of the secondary battery using components (ân,{circumflex over (b)}n), associated with a direct term in the equivalent circuit model, in the estimated parameters, the open circuit voltage estimate value {circumflex over (V)}0 and an upper limit voltage Vmax of the terminal voltage, and an available output power estimating section estimating an available output power Pout for the secon

Abstract: For estimation of a critical state of a performance under a working condition of a secondary cell, in consideration of an internal resistance of the cell, a variable data provider provides variable data on the performance, including a first data on a variant of the performance, a second data on a current of the cell, and an estimated third data on a dynamic characteristic of the internal resistance, a specified data provider provides specified data on the cell, including a fourth data on a permissible range of the variant under the prescribed working condition, and exact data on the dynamic characteristic, and a critical state estimator processes the variable and specified data for estimation of the critical state, and has an internal resistance setter to process the second and third data to set exact data as a function of second data defining the dynamic characteristic, and an estimating element to process the first, fourth, and exact data to estimate the critical state.

Abstract: In input and output enabling power estimating apparatus and method for a secondary cell, an input enabling power (Pin) of the secondary cell is estimated on the basis of parameter estimated values (&thgr;) and an open-circuit voltage (Vo), and an output enabling power (Pout) of the secondary cell is estimated on the basis of the parameter estimated values and the open-circuit voltage (Vo), the parameters are integrally estimated from at least one of equations (1) and (2): 1 V = B ⁡ ( s ) A ⁡ ( s ) ⁢ • ⁢   ⁢ I + 1 C ⁡ ( s ) ⁢ • ⁢   ⁢ Vo , ⁢ wherein ⁢ ⁢ A ⁡ ( s ) = ∑ k = 0 n ⁢ a k ⁢ • ⁢   ⁢ s k , B ⁡ ( s ) = ∑ k = 0 n ⁢ b k ⁢ • ⁢   ⁢ s k , C ⁡ ( s ) = ∑ k = 0 n ⁢ c k ⁢ • ⁢   ⁢ s k , ( 1 )

Abstract: In charge rate estimating apparatus and method for a secondary cell, a current flowing through the secondary cell is measured, a voltage across terminals of the secondary cell is measured, an adaptive digital filtering is carried out using a cell model in a continuous time series shown in an equation (1), all of parameters at one time are estimated, the parameters corresponding to an open-circuit voltage which is an offset term of the equation (1) and coefficients of A(s), B(s), and C(s) which are transient terms, and, the charge rate is estimated from a relationship between a previously derived open-circuit voltage V0 and the charge rate SOC using the open-circuit voltage V0, 1 V = B ⁡ ( s ) A ⁡ ( s ) · I + 1 C ⁡ ( s ) · V 0 , ( 1 )

Abstract: In order to prevent an acceleration slip in an early stage of acceleration even in starting, an acceleration slip control system has a predicting section for predicting an acceleration slip of a drive wheel of a vehicle, a prediction control section for determining an initial value of a driving force reduction quantity and decreases the driving force by increasing the driving force reduction quantity to the initial value to prevent an occurrence of an acceleration slip when the acceleration slip is predicted, and a modifying section for modifying the initially set driving force reduction quantity in accordance with a sensed actual slipping condition during a prediction control of the prediction control section.