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Power battery SOC estimation device and estimation method thereof

A power battery and estimation device technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as complex algorithms, long battery rest time, and inaccurate estimation of battery remaining power, and achieve high estimation accuracy , Good ability to correct cumulative error and initial error, good real-time effect

Inactive Publication Date: 2019-12-31
XIAN TECHNOLOGICAL UNIV
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Problems solved by technology

[0004] The present invention provides a device and method for estimating the SOC of a power battery, which can accurately estimate the remaining power of the power battery, and solve the shortcomings of inaccurate estimation of the remaining power of the battery, long standing time of the battery, and complex algorithms in the prior art.

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  • Power battery SOC estimation device and estimation method thereof
  • Power battery SOC estimation device and estimation method thereof
  • Power battery SOC estimation device and estimation method thereof

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[0021] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods.

[0022] see figure 1 , figure 1 It is a composition diagram of the power battery SOC estimation device of the present invention, including a main control chip, multiple sets of single batteries, a current sensor, multiple sets of voltage sensors, multiple sets of temperature sensors, an A / D interface board, a signal conditioning board, A CAN controller and an upper computer PC; the multiple sets of single batteries are connected in se...

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Abstract

The invention relates to the field of new energy automobile electronics, in particular to a power battery SOC estimation device, and discloses a power battery SOC estimation method which is on the basis of extended Kalman filter and combines an ampere-hour integral method and an open-circuit voltage method. Through dynamically correcting observation errors and real-time capacities, the power battery estimation precision is further improved. By adoption of the algorithm, the power battery SOC estimation device has favorable accumulated error and initial error correction ability and is capable of correctly estimating the remaining capacities of the power batteries.

Description

technical field [0001] The invention relates to the field of new energy vehicle electronics, in particular to a device for estimating the SOC of a power battery and an estimating method thereof. Background technique [0002] As a key component of electric vehicles, the performance of power batteries directly affects the battery life and mobility of the vehicle. The state of charge (State of Charge, SOC) of the power battery is a measure of the current remaining power of the power battery. In order to alleviate the driver's mileage anxiety and prolong the service life of the battery, it needs to be accurately estimated. [0003] In the existing estimation methods, there are generally disadvantages such as inaccurate estimation, long battery resting time, and complex algorithms; for example, the ampere-hour integration method obtains the SOC of the battery by integrating the monitored loop current, and its accuracy depends heavily on The accuracy of the current sensor, the al...

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Application Information

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IPC IPC(8): G01R31/367G01R31/396G01R31/388
CPCG01R31/367G01R31/388G01R31/396
Inventor 王琪何培杰马江睿
Owner XIAN TECHNOLOGICAL UNIV
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