Battery monitoring device
First Claim
1. A battery monitoring device configured to monitor performance of one or more battery cells, comprising:
- a signal injector configured to produce a replacement physical set that emulates one or more physical properties associated with the one or more battery cells; and
a multiplexer configured to selectively output, during different periods of time, the replacement physical set received from the signal injector or a physical set of physical properties received from the one or more battery cells.
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Accused Products
Abstract
A battery monitoring device suitable for monitoring performance of one or more battery cells, such as with respect to a battery pack powering a vehicle. The battery monitoring device includes a signal injector configured to produce a replacement physical set that emulates one or more physical properties associated with the one or more battery cells, a multiplexer configured to selectively output, during different periods of time, the replacement physical set received from the signal injector or a physical set of physical properties received from the one or more battery cells, a sensor circuit configured to separately convert the physical set to a first signal set representing a first digitized measurement of the physical set and the replacement physical set to a second signal set representing a second digitized measurement of the replacement physical set, and a controller configured to compare the first signal set to the second signal set for a variance outside of a predetermined threshold. The controller may be configured to output a switch command suitable to switch the one or more battery cells into a safe state. The replacement physical set may be predetermined physical quantities that emulate a threshold range of physical properties produced during normal or safe operation of the one or more battery cells.
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Citations
20 Claims
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1. A battery monitoring device configured to monitor performance of one or more battery cells, comprising:
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a signal injector configured to produce a replacement physical set that emulates one or more physical properties associated with the one or more battery cells; and a multiplexer configured to selectively output, during different periods of time, the replacement physical set received from the signal injector or a physical set of physical properties received from the one or more battery cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for monitoring performance of battery cells in a battery pack, comprising:
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converting a physical set of physical properties received from the battery cells to a first signal set representing a first digitized measurement of the physical set; producing a replacement physical set that emulates one or more physical properties associated with the battery cells; converting the replacement physical set to a second signal set representing a second digitized measurement of the replacement physical set; and comparing the first signal set to the second signal set for a variance outside of a predetermined threshold. - View Dependent Claims (11, 12, 13, 14)
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15. A vehicle comprising:
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an electric motor configured to power the vehicle; a battery pack configured to power the electric motor; and a vehicle system controller configured to control operation of the electric motor and the battery pack, wherein the vehicle system controller comprises a battery monitoring device configured to monitor performance of one or more battery cells within the battery pack, the battery monitoring device comprising; a signal injector configured to produce a replacement physical set that emulates one or more physical properties associated with the one or more battery cells; and a multiplexer configured to selectively output, during different periods of time, the replacement physical set received from the signal injector or a physical set of physical properties received from the one or more battery cells. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification