Method for estimating state-of-energy of battery and computer readable storage medium
A battery energy and energy state technology, applied in secondary batteries, measuring electrical variables, circuits, etc., can solve problems such as inaccurate lithium battery state estimation algorithms, and achieve accurate estimation results
Active Publication Date: 2017-08-04
ANHUI RNTEC TECH CO LTD
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Problems solved by technology
However, during the actual operation of electric vehicles, seasonal changes will lead to changes in the ambient temperature of lithium batteries, especially in northern regions. However, there is a large difference, which leads to the inaccuracy of the algorithm for lithium battery state estimation.
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[0042] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the implementation manners of the present invention, and are not intended to limit the implementation manners of the present invention.
[0043] figure 1 is a flowchart of a method for estimating battery SOE according to an embodiment of the present invention. Such as figure 1 As shown, the method may include:
[0044] In step S10, the temperature of the battery is detected.
[0045] In step S11, the capacity of the battery is calculated. Specifically, the capacity of the battery at the temperature may be determined according to the temperature of the battery and the first correspondence between the pre-stored temperature and the capacity of the battery.
[0046] In one embodiment of the p...
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The embodiment mode of the invention discloses a method for estimating state-of-energy (SOE) of battery and a computer readable storage medium and belongs to the field of battery evaluation. The method comprises the steps of detecting a temperature of the battery; determining the capacity of the battery at the temperature according to a first corresponding relationship between the temperature and the preset temperature and the capacity of the battery; determining an SOC of the battery according to the capacity of the battery; determining open-circuit voltage of the battery under the SOC of the battery according to a second corresponding relationship between the SOC of the battery and a prestored SOC and the open-circuit voltage of the battery; and estimating the state-of-energy SOE of the battery according to the capacity, the open-circuit voltage and the current of the battery. According to the method and the storage medium, the SOE can be corrected through detecting the temperature of the battery, and estimation of the SOE is more accurate.
Description
technical field [0001] The present invention relates to the field of battery evaluation, in particular to a method for estimating the energy state of a battery and a computer-readable storage medium. Background technique [0002] Affected by energy crisis and environmental crisis, electric vehicles have developed rapidly. For electric vehicles, estimating the cruising range is a difficult problem. At present, the State of Charge (SOC) of lithium batteries is commonly used to judge its cruising range, but the SOC and the cruising range of electric vehicles do not change linearly. At the end of battery discharge, the change of SOC is faster than the cruising range , This has led to users' misjudgment of the cruising range of electric vehicles. [0003] The state of energy (State of Energy, SOE) of lithium batteries is closely related to the cruising range of electric vehicles. It is a better way to use SOE instead of SOC to judge the cruising range. Lithium battery state es...
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Login to View More IPC IPC(8): G01R31/36
CPCG01R31/396H01M10/48Y02E60/10
Inventor 曾国建吉祥蔡华娟朱建范晓东余铿钱海进
Owner ANHUI RNTEC TECH CO LTD