Spectroscopic battery-cell impedance measurement arrangement
First Claim
1. A battery cell measurement system comprising:
- a signal generator coupled to a pulse density modulation circuit, the pulse density modulation circuit generating a control signal which drives a switch, the switch being connected between a first terminal of a battery cell and a first terminal of a bleeding impedance, a second terminal of the bleeding impedance being coupled to a second terminal of the battery cell;
the first terminal of the bleeding impedance being coupled to a first terminal of a second switch,the second terminal of the bleeding impedance being coupled to a first terminal of a third switch,a second terminal of the second switch and second terminal of the third switch being coupled to each other and further coupled to a low-pass filter,a signal generated by the low-pass filter being inputted into an analog to digital converter, the analog to digital converter providing a signal which is representative either for one of a signal across the bleeding impedance, or a signal between the terminals of the battery cell.
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Abstract
A battery cell measurement system comprising a signal generator coupled to a pulse density modulation circuit generating a control signal which drives a switch connected between a first terminal of a battery cell and a first terminal of a bleeding impedance, a second terminal of the bleeding impedance being coupled to a second battery cell terminal. The first terminal is coupled to a first terminal of a second switch. The second terminal is coupled to a first terminal of a third switch. A second terminal of the second switch and second terminal of the third switch are coupled and are further coupled to a low-pass filter. A signal generated by the low-pass filter is inputted into an analog to digital converter, which provides a signal representative of either a signal across the bleeding impedance, or a signal between the battery cell terminals.
11 Citations
6 Claims
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1. A battery cell measurement system comprising:
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a signal generator coupled to a pulse density modulation circuit, the pulse density modulation circuit generating a control signal which drives a switch, the switch being connected between a first terminal of a battery cell and a first terminal of a bleeding impedance, a second terminal of the bleeding impedance being coupled to a second terminal of the battery cell; the first terminal of the bleeding impedance being coupled to a first terminal of a second switch, the second terminal of the bleeding impedance being coupled to a first terminal of a third switch, a second terminal of the second switch and second terminal of the third switch being coupled to each other and further coupled to a low-pass filter, a signal generated by the low-pass filter being inputted into an analog to digital converter, the analog to digital converter providing a signal which is representative either for one of a signal across the bleeding impedance, or a signal between the terminals of the battery cell. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification
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- Resources
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Current AssigneeDatang NXP Semiconductors Company Limited
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Original AssigneeNXP B.V. (NXP Semiconductors NV)
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Inventorsvan Lammeren, Johannes Petrus Maria, Lammers, Matheus Johannus Gerardus
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Primary Examiner(s)Tso, Edward
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Assistant Examiner(s)OMAR, AHMED H
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Application NumberUS13/282,126Publication NumberTime in Patent Office881 DaysField of Search324/426US Class Current324/426CPC Class CodesG01R 31/367 Software therefor, e.g. for...G01R 31/389 Measuring internal impedanc...
