Apparatus for detecting remanent stored energy in storage battery and apparatus for warning of reduction in remanent stored energy in storage battery
First Claim
1. An apparatus for detecting the remanent stored energy in a storage battery, comprising:
- current detecting means for detecting discharging and charging currents of the storage battery;
temperature detecting means for detecting a temperature of the storage battery;
counting means for detecting the number of times that the storage battery has been charged to capacity;
discharging current summing means for adding values of the discharged current of the storage battery as detected by said current detecting means at predetermined time intervals since the storage battery was fully charged, and for storing in memory the added values as a reference amount of consumed energy of the storage battery;
consumed energy calculating means for multiplying said reference amount of said consumed energy at a preset time by a first consumed-energy corrective coefficient which is determined depending on the temperature of the storage battery as detected by said temperature detecting means at the present time, thereby determining an amount of consumed electric energy of the storage battery;
subtracting means for subtracting the amount of consumed electric energy determined by said consumed energy calculating means from an initial amount of stored energy of the storage battery, thereby determining the difference as a reference remanent stored energy of the storage battery;
charging current adding means for adding values of the charging current of the storage battery as detected by said current detecting means at predetermined time intervals when the storage battery is charged, and for storing the added values as an amount of charged energy of the storage battery;
processing means for determining, as a first remanent-energy corrective coefficient, the ratio of said reference amount of consumed energy which has been stored by said discharging current adding means immediately before the storage battery was last charged and said amount of charged energy which has been stored by said charging current adding means when the last charging of the storage battery was completed; and
remanent energy calculating means for determining a remanent stored energy of the storage battery by multiplying said reference remanent stored energy stored by said subtracting means, by said first remanent-energy corrective coefficient and a second remanent-energy corrective coefficient which is predetermined depending on the total number of times that the storage battery has been charged as detected by said counting means and the temperature of the storage battery as detected by said temperature detecting means when the storage battery was last charged.
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Abstract
A reference amount of consumed energy of a storage battery on an electric-powered vehicle is calculated by adding values of a discharging current of the storage battery which are detected at predetermined time intervals since the storage battery was fully charged. The reference amount of consumed energy is corrected, i.e., multiplied, by consumed-energy corrective coefficients based on the battery temperature, the discharging current, the battery voltage, and the specific gravity of the storage battery, thereby determining an amount of consumed electric energy. A reference amount of remanent stored energy of the storage battery is determined by deducting the determined amount of consumed electric energy from an initial amount of stored energy of the storage battery. The reference amount of remanent stored energy is then corrected, i.e., multiplied, by remanent-energy corrective coefficients based on the ratio of amounts of charged and discharged energy, the number of times that the storage battery has been charged, and the battery temperature.
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Citations
38 Claims
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1. An apparatus for detecting the remanent stored energy in a storage battery, comprising:
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current detecting means for detecting discharging and charging currents of the storage battery; temperature detecting means for detecting a temperature of the storage battery; counting means for detecting the number of times that the storage battery has been charged to capacity; discharging current summing means for adding values of the discharged current of the storage battery as detected by said current detecting means at predetermined time intervals since the storage battery was fully charged, and for storing in memory the added values as a reference amount of consumed energy of the storage battery; consumed energy calculating means for multiplying said reference amount of said consumed energy at a preset time by a first consumed-energy corrective coefficient which is determined depending on the temperature of the storage battery as detected by said temperature detecting means at the present time, thereby determining an amount of consumed electric energy of the storage battery; subtracting means for subtracting the amount of consumed electric energy determined by said consumed energy calculating means from an initial amount of stored energy of the storage battery, thereby determining the difference as a reference remanent stored energy of the storage battery; charging current adding means for adding values of the charging current of the storage battery as detected by said current detecting means at predetermined time intervals when the storage battery is charged, and for storing the added values as an amount of charged energy of the storage battery; processing means for determining, as a first remanent-energy corrective coefficient, the ratio of said reference amount of consumed energy which has been stored by said discharging current adding means immediately before the storage battery was last charged and said amount of charged energy which has been stored by said charging current adding means when the last charging of the storage battery was completed; and remanent energy calculating means for determining a remanent stored energy of the storage battery by multiplying said reference remanent stored energy stored by said subtracting means, by said first remanent-energy corrective coefficient and a second remanent-energy corrective coefficient which is predetermined depending on the total number of times that the storage battery has been charged as detected by said counting means and the temperature of the storage battery as detected by said temperature detecting means when the storage battery was last charged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An apparatus for warning of a reduction in the remanent stored energy of a storage battery installed as a power source on an electric-powered vehicle, comprising:
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remanent energy detecting means for detecting the remanent stored energy of the storage battery; switch opening/closing detecting means for detecting whether a main switch of the electric-powered vehicle is turned on or off; door opening/closing detecting means for detecting whether a door of the electric-powered vehicle is open or closed; and warning controlling means for producing a warning sound if said remanent stored energy of the storage battery as detected by said remanent energy detecting means is smaller than a predetermined level when said main switch is turned off as detected by said switch opening/closing means, and said door is open as detected by said door opening/closing means. - View Dependent Claims (23, 24, 25, 26, 27)
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28. An apparatus for detecting the remanent stored energy in a storage battery, comprising:
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temperature detecting means for detecting a temperature of the storage battery; means for determining a reference amount of consumed energy of the storage battery; and consumed energy calculating means for multiplying said reference amount of consumed energy at a present time by a first consumed-energy corrective coefficient which is determined depending on the temperature of the storage battery as detected by said temperature detecting means at the present time, thereby determining an amount of consumed electric energy of the storage battery; and subtracting means for subtracting the amount of consumed electric energy determined by said consumed energy calculating means from an initial amount of stored energy of the storage battery, thereby determining the difference as reference remanent stored energy of the storage battery; and remanent energy calculating means for determining a remanent stored energy of the storage battery by multiplying said reference remanent stored energy calculated by said subtracting means by a remanent-energy corrective coefficient which is predetermined depending on the temperature of the storage battery as detected by said temperature detecting means when the storage battery was last charged. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. An apparatus for detecting the remanent stored energy in a storage battery installed as a power source on an electric powered vehicle comprising:
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current detecting means for detecting discharging and charging currents of the storage battery; temperature detecting means for detecting a temperature of the storage battery; counting means for detecting the number of times that the storage battery has been charged to capacity; discharging current summing means for adding values of the discharged current of the storage battery as detected by said current detecting means at predetermined time intervals since the storage battery was fully charged, and for storing in memory the added values as a reference amount of consumed energy of the storage battery; consumed energy calculating means for multiplying said reference amount of said consumed energy at a preset time by a first consumed-energy corrective coefficient which is determined depending on the temperature of the storage battery as detected by said temperature detecting means at the preset time, thereby determining an amount of consumed electric energy of the storage battery; subtracting means for subtracting the amount of consumed electric energy determined by said consumed energy calculating means from an initial amount of stored energy of the storage battery, thereby determining the difference as a reference remanent stored energy of the storage battery; charging current adding means for adding values of the charging current of the storage battery as detected by said current detecting means at predetermined time intervals when the storage battery is charged, and for storing in memory the added values as an amount of charged energy of the storage battery; processing means for determining, as a first remanent-energy corrective coefficient, the ratio of said reference amount of consumed energy which has been stored by said discharging current adding means immediately before the storage battery was last charged and said amount of charged energy which has been stored by said charging current adding means when the last charging of the storage battery was completed; and remanent energy calculating means for determining a remanent stored energy of the storage battery by multiplying said reference remanent stored energy stored by said subtracting means, by said first remanent-energy corrective coefficient which is predetermined depending on the total number of times that the storage battery has been charged as detected by said counting means and the temperature of the storage battery as detected by said temperature detecting means when the storage battery was last charged; and switch opening/closing detecting means for detecting whether a main switch of the electric-powered vehicle is turned on or off; and door opening/closing detecting means for detecting whether a door of the electric-powered vehicle is open or closed; door locking detecting means for detecting whether said door is locked or not; and warning controlling means for producing a warning sound if said remanent stored energy of the storage battery as calculated by said remanent energy calculating means is smaller than a predetermined level when said main switch is turned off as detected by said switch opening/closing means, said door is open as detected by said door opening/closing means, and said door is locked as detected by said door locking detecting means after said door has been opened.
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38. An apparatus for detecting the remanent stored energy in a storage battery, comprising:
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temperature detecting means for detecting a temperature of the storage battery; means for determining a reference amount of consumed energy of the storage battery; and consumed energy calculating means for multiplying said reference amount of consumed energy at a present time by a first consumed-energy corrective coefficient which is determined depending on the temperature of the storage battery as detected by said temperature detecting means at the present time, thereby determining an amount of consumed electric energy of the storage battery; and remanent energy calculating means for determining a remanent stored energy of the storage battery by multiplying a reference remanent stored energy by a remanent-energy corrective coefficient which is predetermined depending on the temperature of the storage battery as detecting by said temperature detecting means when the storage battery was last charged.
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Specification