Battery peak power estimation method and device
A peak power and battery technology, applied in the direction of electrical devices, measuring electric power, measuring devices, etc., can solve the problems of affecting battery safety performance, large prediction results, and not considering battery operating temperature, etc.
Active Publication Date: 2020-03-27
HUAWEI TECH CO LTD
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Problems solved by technology
[0004] In the existing scheme, the limitation of battery operating temperature is not considered, resulting in the prediction result may be too large, resulting in overheating of the battery during operation, which affects the safety performance of the battery
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[0051] The embodiment of the present application provides a method and device for estimating the peak power of the battery, which is used to consider the influence of the operating temperature in the process of estimating the peak power of the battery, avoiding excessive peak current estimation, resulting in battery overheating, and improving battery safety. performance.
[0052] In order to enable those skilled in the art to better understand the solutions of the present application, the following will describe the embodiments of the present application with reference to the drawings in the embodiments of the present application.
[0053] The "first" or "second" mentioned in the present application documents are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence. In addition, "comprising" or "having" and any variations thereof mentioned in the application documents are intended to cover non-exclusive inclusion, for exampl...
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The invention discloses a battery peak power estimation method and device, which are used for avoiding a battery over-temperature phenomenon caused by overlarge peak current estimation and improving the safety performance of a battery. The method comprises the steps of acquiring the voltage, the current, the state of charge and the temperature of a to-be-measured battery at the current moment; determining a first continuous peak current according to the battery working temperature constraint condition and the temperature at the current moment; determining a to-be-second continuous peak currentaccording to the terminal voltage constraint condition and the voltage at the current moment; determining a third continuous peak current according to the battery state-of-charge constraint conditionand the state-of-charge at the current moment; determining the minimum continuous peak current according to the first continuous peak current, the second continuous peak current and the third continuous peak current; determining a peak voltage according to the minimum continuous peak current; and determining the peak power of the to-be-tested battery according to the minimum continuous peak current and the peak voltage.
Description
technical field [0001] The present application relates to the field of batteries, in particular to a method and device for estimating battery peak power. Background technique [0002] The peak power of the power battery is the maximum continuous power allowed to be released or charged by the power battery in a short period of time (usually 10s, 60s, etc.), where the peak power of the battery includes two types of peak charging power and peak discharging power. [0003] In the existing scheme, on the one hand, by establishing a battery equivalent circuit model, the estimated value of the peak current based on the voltage constraint is calculated based on the terminal voltage constraint of the model; on the other hand, based on the battery state of charge (SOC) constraint The estimated value of the peak current based on the SOC constraint is calculated. The estimated value of the peak current based on the above two constraints is the minimum value, that is, the final estimate...
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IPC IPC(8): G01R31/385G01R31/367G01R31/388G01R31/3842G01R21/00
CPCG01R21/00G01R31/3648
Inventor 蔡伟杨瑞秦学熊瑞
Owner HUAWEI TECH CO LTD