BATTERY SIMULATOR WITH VARIABLE CURRENT CAPACITY
First Claim
1. An electric vehicle battery simulator comprising:
- a controller;
analog output circuitry configured to be controlled by the controller to output test current and test voltage; and
switching circuitry connected across the analog output circuitry, the circuitries collectively having a first state and a second state, and the second state having an increased capacitance that hinders rates of change in the test voltage relative to the first state.
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Accused Products
Abstract
A battery simulator can operate to provide different outputs. These outputs provide different characteristics related to how a device under test operates. In an example, a controller such as an electronic control module (ECM) or battery energy control module (BECM) can be tested. The battery simulator may provide different modes, e.g., a high current mode or a voltage change over time mode. A traction battery simulator may include a controller, analog output circuitry being controlled by the controller to output test current and test voltage, and switching circuitry connected to the analog output circuitry that has a first state and a second state. The first state is to provide an increased change in voltage over change in time relative to the second state. The second state is to provide an increased capacitance over the first state.
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Citations
14 Claims
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1. An electric vehicle battery simulator comprising:
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a controller; analog output circuitry configured to be controlled by the controller to output test current and test voltage; and switching circuitry connected across the analog output circuitry, the circuitries collectively having a first state and a second state, and the second state having an increased capacitance that hinders rates of change in the test voltage relative to the first state. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method to simulate a hybrid vehicle battery comprising:
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starting switch control at an output; in response to a demand for current exceeding a threshold, using the switch control to close a switch and apply additional capacitance across the output; and in response to a demand for current less than the threshold, using the switch control to open the switch to remove the additional capacitance from across the output. - View Dependent Claims (8, 9)
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10. An electric vehicle battery simulation method comprising:
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controlling analog output circuitry to output test current and test voltage; and switching the circuitry between a first state and a second state based on current demand, the first state having a decreased capacitance that permits increased rates of change in voltage relative to the second state. - View Dependent Claims (11, 12, 13, 14)
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Specification