US 10,481,214 B2Granted

Battery temperature detection

AssigneeInfineon Technologies AG

InventorsStefano Marsili, Christoph Sandner, Johannes Thielmann

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Abstract

A method and a temperature detection circuit are disclosed. An example of the method includes driving an alternating current with a first frequency into a battery and detecting an imaginary part of a battery impedance at the first frequency; driving an alternating current with a second frequency different from the first frequency into the battery and detecting an imaginary part of the battery impedance at the second frequency; and calculating an intercept frequency at which the imaginary part equals a predefined value at least based on the imaginary part obtained at the first frequency and the imaginary part obtained at the second frequency.

Claims32

Dependent claims

A method comprising:

driving an alternating input current with a first frequency into a battery, the first frequency having a first predetermined value, and detecting a first imaginary part of an impedance of the battery at the first frequency;
driving the alternating input current with a second frequency into the battery, the second frequency having a second predetermined value different from the first predetermined value of the first frequency, and detecting a second imaginary part of the impedance of the battery at the second frequency;
and
calculating, by a control and calculation circuit, an intercept frequency at which a third imaginary part of the impedance of the battery at the intercept frequency equals a predefined value at least based on the first imaginary part of the impedance of the battery at the first frequency and the second imaginary part of the impedance of the battery at the second frequency.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/419,687Filed 30 Jan 2017
Published: US 2018/0217209 A12 Aug 2018
Granted: 19 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

G01R 31/389
Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of…
G01K 7/16
Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using…: using…
G01K 7/42
Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using…: circuits…
G01R 31/3648
Constructional arrangements: comprising digital calculation means, e.g. for performing an algorithm

Family

US 2018/0217209 A1Pre-grant publication · published 2 Aug 2018
US 10,481,214 B2This patent

From the US filing history. Foreign family members aren’t listed.

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