Wireless traction battery force sensor
AssigneeFord Global Technologies, LLC
InventorsArnold Kweku Mensah-Brown, Richard Dyche Anderson
Life of this patent
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Abstract
A traction battery of a vehicle includes a temperature compensated passive wireless surface acoustic wave sensor within the traction battery and a controller. The temperature compensated passive wireless surface acoustic wave sensor is configured to receive a broadcast signal and transmit a reflected signal. The controller is programmed to transmit the broadcast signal and receive the reflected signal, and based on a difference in phase and amplitude between the broadcast and reflected signals indicative of an increase in pressure within the traction battery, stop charging the traction battery.
Claims20
A battery system comprising:
- a temperature compensated passive wireless surface acoustic wave sensor within a battery configured to receive a broadcast signal and transmit reflected signals;
- and
- a controller configured to initiate transmission of the broadcast signal, and based on detected differences in phase and amplitude between the broadcast signal and reflected signals from the sensor indicative of an increase in pressure within the battery during charging of the battery, stop the charging.
A method of operating a battery in a vehicle comprising:
- by a controller,
- initiating transmission of a broadcast signal to a surface acoustic wave (SAW) sensor, and
- charging the battery according to a detected difference between the broadcast signal and corresponding reflected signals from the SAW sensor indicative of a pressure within the battery.
A vehicle battery system comprising:
- a temperature compensated passive wireless surface acoustic wave sensor within a battery configured to receive a broadcast signal and transmit a reflected signal;
- and
- a controller configured to initiate transmission of the broadcast signal, and responsive to a detected difference in phase and amplitude between the broadcast signal and a reflected signal from the sensor indicative of a pressure within the battery exceeding a threshold, charge the battery.
Dependencies are inferred from the claim text.