Battery cluster state-of-charge online estimation method
A state of charge and battery cluster technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problem of low calculation accuracy, battery stacks or battery clusters that cannot be fully charged or empty, and affect the performance of energy storage power stations and other problems to achieve the effect of improving calculation accuracy and smoothing the state of charge curve
Active Publication Date: 2021-11-05
杭州科工电子科技有限公司
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Problems solved by technology
Both of these calculation schemes have the problem that the state of charge of the battery stack and the state of charge of the battery cluster have a step, and when the single battery is fully charged or discharged, the battery stack or battery cluster cannot be fully charged or discharged. For the battery The calculation accuracy of the state of charge of the stack or battery cluster is not high, which affects the performance of the energy storage power station
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[0062] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0063] Wherein, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical drawings, and should not be construed as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, Enlargement or reduction does not represent the size of the actual product; for those skilled in the art, it is understandable that certain known structures and their descriptions in the drawings may be omitted.
[0064] In the drawings of the embodiments of the present invention, the same or similar symbols correspond to the same or similar components; , "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional re...
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The invention discloses a battery cluster state-of-charge online estimation method. The method comprises the following steps of S1, calculating a state of charge of a battery stack to which each single battery belongs by utilizing the real-time calculated state of charge of each single battery; and S2, calculating the state of charge of each battery cluster in the battery stack by using the real-time calculated state of charge of the battery stack and the state of charge of each single battery. According to the method, the state of charge of a single battery is firstly calculated by using battery voltage and current data acquired in real time, then the charge state of a battery stack is calculated, and finally, the charge state of a battery cluster in the battery stack is calculated by combining the charge state of the single battery and the charge state of the battery stack; real-time grading calculation of the charge state of the battery stack, the charge state of the battery cluster and the charge state of the single battery is realized, calculation precision of the charge state of the battery cluster is improved, and a smooth charge state curve is obtained; and meanwhile, running states of the battery stack and the battery cluster are fully charged or emptied along with the full-charge state or the emptied state of the single batteries.
Description
technical field [0001] The invention relates to the technical field of battery management, in particular to an online estimation method for the state of charge of a battery cluster. Background technique [0002] In recent years, the application scale of lithium-ion batteries in energy storage power stations has grown explosively, and the battery management system (Battery management system, BMS) that works with lithium-ion batteries is responsible for managing the charging and discharging status of batteries and using them safely. The state of charge (SOC) of the battery is a physical quantity that directly reflects the energy state of the battery, and is an important parameter for battery charge and discharge management and safety control. [0003] The battery system of an energy storage power station generally consists of multiple single cells connected in series and parallel to form a battery cluster, and multiple battery clusters are then connected in parallel to form a ...
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Login to View More IPC IPC(8): G01R31/3842G01R31/388
CPCG01R31/3842G01R31/388
Inventor 宋欣民陈刚良周建军王荣强
Owner 杭州科工电子科技有限公司