SENSOR SYSTEM FOR MEASURING BATTERY INTERNAL STATE
First Claim
1. A vehicle comprising:
- an electric motor;
a battery to store electrical energy for the electric motor;
a surface acoustic wave sensor connected to the battery, and configured to receive a response signal from the battery and to wirelessly transmit an output signal indicating battery state based on the response signal; and
control circuitry configured to control the electric motor and the battery based on the output signal.
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Accused Products
Abstract
Systems and methods for sensing internal states of vehicle batteries are described. From this internal state information, various physical characteristics of the battery can be measured, calculated or inferred. A vehicle can include an electric motor, a battery to store electrical energy for the electric motor, and a sensor connected to the battery to sense a battery state, to receive an input signal, and to wirelessly transmit an output signal indicating the battery state. The vehicle can also include control circuitry to receive the output signal and to control the electric motor and the battery. In examples, the battery may have a physical property that changes based on a state of the battery. This physical property may be measured by the sensor. The sensor may be passive and built into the structure of the battery. The sensor can be a magnetic field sensor or a surface wave acoustic sensor.
43 Citations
15 Claims
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1. A vehicle comprising:
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an electric motor; a battery to store electrical energy for the electric motor; a surface acoustic wave sensor connected to the battery, and configured to receive a response signal from the battery and to wirelessly transmit an output signal indicating battery state based on the response signal; and control circuitry configured to control the electric motor and the battery based on the output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A rechargeable battery monitoring system comprising:
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a surface acoustic wave sensor connected to a battery to sense a state of the battery based on a response of the battery to an input signal and indicative of a Young'"'"'s modulus of an electrode of the battery; and control circuitry to control operation of the battery based on the state. - View Dependent Claims (9, 10, 11, 12)
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13. A method for detecting state of a battery comprising:
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wirelessly transmitting an input signal to the battery; receiving the input signal at a passive sensor connected to the battery; outputting a response signal that changes based on a modulus of the battery; and outputting battery state based on the response signal. - View Dependent Claims (14, 15)
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Specification