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Series battery pack SOP (state of power) on-line estimation method and application thereof

A technology of series battery packs and power status, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of not being able to make reasonable use of real-time sampling values ​​of battery voltage, limiting the accuracy of single-step SOP prediction of batteries, etc.

Active Publication Date: 2016-01-27
SHANGHAI 01 POWER TECH +1
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Problems solved by technology

Most of the existing methods only consider the limitation of the battery voltage threshold on the battery SOP, but ignore the limitation of the current threshold on the battery peak power; at the same time, the same method is used to predict the single-step SOP and multi-step SOP of the battery. Real-time sampling values ​​of battery voltage and current can be reasonably used, thus limiting the prediction accuracy of battery single-step SOP

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  • Series battery pack SOP (state of power) on-line estimation method and application thereof

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Embodiment Construction

[0065] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be pointed out that for those of ordinary skill in the art, a number of modifications and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0066] Such as figure 1 As shown, the embodiment of the present invention provides an online method for estimating the power state SOP of a series battery pack, which includes the following steps:

[0067] Step 1. Perform recursive online identification based on the battery parameters in the battery equivalent circuit model and the battery parameters that are not covered by the battery effect in the battery equivalent circuit model;

[0068] Step 2. Perform the next battery ...

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Abstract

The invention discloses a series battery pack SOP (state of power) on-line estimation method and an application thereof. The method comprises the following steps: carrying out the recursion on-line recognition of battery parameters and a battery dynamic effect; carrying out the battery SOP calculation at a next moment based on voltage limiting; carrying out the battery SOP calculation at a moment after the next moment based on voltage limiting; carrying out the battery SOP calculation at the next moment based on current limiting; carrying out the battery SOP calculation at the moment after the next moment based on current limiting; and carrying out the battery SOP on-line estimation at the next moment and the moment after the next moment based on the integration of voltage limiting and current limiting. The method gives the consideration of the impact on peak power from battery voltage and current working windows, can achieve high-precision SOP single-step prediction and multi-step prediction at the same time, can effectively prevent a battery from being used indiscriminately in an actual operation process, and helps other related system achieve optimal energy management.

Description

Technical field [0001] The present invention relates to the technical field of battery management systems, in particular to an online estimation method of the power state SOP of a series battery pack and its application. Background technique [0002] SOP is a parameter describing the maximum charge and discharge capacity of the battery. It is used to determine the maximum input to the battery and the maximum output power of the load, to avoid abuse of the battery, and to determine the acceleration and climbing performance and regenerative braking capability of electric vehicles. [0003] Battery SOP prediction is a new field in the research of battery management system. There are mainly existing methods for battery SOP estimation at home and abroad: The American Next Generation Automobile Alliance (PNGV) proposed to use the pulse discharge (HybridPulsePowerCharacteristics, HPPC) method to estimate the maximum charge and discharge capacity of the battery; accurate prediction based o...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 杨林赵小巍羌嘉曦
Owner SHANGHAI 01 POWER TECH
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