Method and device for estimating available capacity and state of health of minimum single battery and battery system
A battery system and effective capacity technology, applied in the direction of measuring devices, measuring electrical variables, measuring electricity, etc., can solve problems such as inaccurate estimation of effective capacity, inaccurate estimation of the smallest battery cell, and inaccurate estimation of the health status of the battery system. Achieve the effect of solving the inaccurate estimation of the health status, overcoming the calculation of the battery health status, and overcoming the battery health status
Active Publication Date: 2018-09-25
ZHENGZHOU YUTONG BUS CO LTD
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[0008] The object of the present invention is to provide a method for estimating the effective capacity of the minimum battery cell to solve the problem of inaccurate estimation of the minimum cell of the existing battery; the present invention also provides a method for estimating the effective capacity of the battery system to solve the problem of The problem of inaccurate estimation of the effective capacity of the existing battery system; the present invention also provides a method for estimating the state of health of the battery system to solve the problem of inaccurate estimation of the state of health of the existing battery system; the present invention also provides a health state of the battery system The state estimation device is used to realize the estimation method of the state of health of the battery system, and solve the problem of inaccurate estimation of the state of health of the existing battery system
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[0059] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0060] Embodiment of the method for estimating the effective capacity of the minimum battery cell of the present invention:
[0061] The entire battery system is composed of battery cells connected in series. After the battery system is powered on, it is first judged whether the battery system is in a charging state. If it is not in a charging state, this calculation is discarded; otherwise, the smallest cell of the battery system is selected as the research object to calculate the effective capacity of the smallest cell.
[0062] The minimum unit of the system is judged according to the voltage of the unit. In the application process of the whole system, the individual cells show the voltage of the single cell, and the voltage of the single cell ...
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The invention provides a method and device for estimating the available capacity and state of health of a minimum single battery and a battery system. The method for estimating the state of health comprises the steps of firstly electrifying the battery system, and determining the initial state of charge of the minimum single battery of the battery system; then determining the state of charge of the minimum single battery at the end of the charging after the battery system is fully charged, and calculating the charging capacity of the minimum single battery; and then calculating the available capacity of the minimum single battery, the available capacity of the battery system and the state of health of the battery system. The invention effectively solves a problem of inaccurate estimation for the available capacity of the minimum single battery of a vehicle, the available capacity of the battery system and the state of health of the battery system.
Description
technical field [0001] The invention belongs to the technical field of new energy vehicle power battery management, and in particular relates to a method and device for estimating the minimum battery cell and system effective capacity and health status. Background technique [0002] Due to the energy crisis and the pressure of environmental pollution, accelerating and cultivating the development of new energy vehicles is an urgent task to promote the sustainable development of the automobile industry. With the release of the "Energy Conservation and New Energy Vehicle Industry Development Plan (2012-2020)" by the General Office of the State Council, various OEMs regard the development of new energy vehicles as an important part of their business and attach great importance to them. Relying on its own advantages, the new energy industry, coupled with the new subsidies and preferential policies of the national ministries and commissions for new energy vehicles, has achieved tr...
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IPC IPC(8): G01R31/36
CPCG01R31/392
Inventor 朱光海游祥龙张红涛周雪松李晓菲
Owner ZHENGZHOU YUTONG BUS CO LTD
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