Indicator for use in vehicles having an energy storage device
First Claim
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1. In an electric vehicle having an energy storage device, an indicator system comprising:
- a processing source to calculate a normalized amount of power available from the energy storage device, the normalized amount being calculated as a function of desired limits on operator use of power actually available from the energy source;
an indicator to indicate the normalized amount of power available from the energy storage device;
wherein the energy source is a battery which provides power for use in providing electric assist and the processing source calculates the normalized amount of power available from the battery as a normalized battery state of charge (SOC) such that the indicator indicates the normalized SOC; and
wherein the normalized battery SOC is calculated based in part on a calculated battery SOC, a minimum battery SOC offset, and a maximum SOC offset.
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Abstract
An indicator to indicate an amount of power available from an energy storage device. The indicator normalizes raw power values to values which are understood by the driver. The indicator indicates the normalized values to facilitate making a driving decision.
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Citations
16 Claims
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1. In an electric vehicle having an energy storage device, an indicator system comprising:
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a processing source to calculate a normalized amount of power available from the energy storage device, the normalized amount being calculated as a function of desired limits on operator use of power actually available from the energy source; an indicator to indicate the normalized amount of power available from the energy storage device; wherein the energy source is a battery which provides power for use in providing electric assist and the processing source calculates the normalized amount of power available from the battery as a normalized battery state of charge (SOC) such that the indicator indicates the normalized SOC; and wherein the normalized battery SOC is calculated based in part on a calculated battery SOC, a minimum battery SOC offset, and a maximum SOC offset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In an electric vehicle having an energy storage device, an indicator system comprising:
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a processing source to calculate a normalized amount of power available from the energy storage device, the normalized amount being calculated as a function of desired limits on operator use of power actually available from the energy source; an indicator to indicate the normalized amount of power available from the energy storage device; and wherein the energy source is a battery which provides power for use in providing electric assist and the processing source calculates the normalized amount of power available from the battery as a normalized battery discharge limit (DCL) such that the indicator indicates the normalized DCL. - View Dependent Claims (11, 12)
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13. In an electric vehicle having an energy storage device, an indicator system comprising:
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a processing source to calculate a normalized amount of power available from the energy storage device, the normalized amount being calculated as a function of desired limits on operator use of power actually available from the energy source; an indicator to indicate the normalized amount of power available from the energy storage device; and wherein the energy source is a battery which provides power for use in providing electric assist and the processing source calculates the normalized amount of power available from the battery as a minimum percentage selected from the group comprising a normalized battery of state of charge (SOC) and a battery percentage discharge limit (DCL). - View Dependent Claims (14)
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15. A method to communicate an amount of available battery power to a driver of a vehicle having electric assist, wherein the amount of available battery power is used by the driver to make a driving decisions with respect to electric assist, the method comprising:
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calculating a raw power value for the battery based on operating parameters of the battery; normalizing the raw power value to produce a displayable power value, the normalized power value being determined as a function of desired limits on operator use of the raw power actually available from the battery; displaying the power value in a position viewable by the driver; and wherein the displayable power value is a normalized battery state of charge (SOC) such that the indicator indicates the normalized SOC, wherein the normalized battery SOC is calculated based in part on a calculated battery SOC, a minimum battery SOC offset, and a maximum SOC offset.
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16. A method to communicate an amount of available battery power to a driver of a vehicle having electric assist, wherein the amount of available battery power is used by the driver to make a driving decisions with respect to electric assist, the method comprising:
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calculating a raw power value for the battery based on operating parameters of the battery; normalizing the raw power value to produce a displayable power value, the normalized power value being determined as a function of desired limits on operator use of the raw power actually available from the battery; displaying the power value in a position viewable by the driver; and wherein the displayable power value is a normalized battery calculating discharge limit (DCL) such that the indicator indicates the normalized DCL, wherein the normalized battery DCL is calculated based in part on a calculated battery DCL, a minimum battery DCL offset, and a maximum DCL offset.
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Specification