Battery pack active equalization control method, system and device
A technology of active equalization and control method, which is applied in the direction of battery circuit devices, circuit devices, charge equalization circuits, etc., can solve the problems of small application range and poor effect, and achieve the effect of wide application range, improved consistency, and high-efficiency active equalization
Active Publication Date: 2018-12-28
GUANGZHOU HKUST FOK YING TUNG RES INST
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Problems solved by technology
[0004] The existing active equalization control methods are often only effective for ternary batteries with steep voltage curves, but are less effective for lithium iron phosphate batteries with very flat voltage curves. Therefore, the existing active equalization control methods for battery packs have a small scope of application.
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[0064] The present invention will be further explained and described below in conjunction with the accompanying drawings and specific embodiments of the description. For the step numbers in the embodiment of the present invention, it is only set for the convenience of explanation and description, and there is no limitation on the order of the steps. The execution order of each step in the embodiment can be carried out according to the understanding of those skilled in the art Adaptive adjustment.
[0065] refer to figure 1 , the present invention is an active balancing control method for a battery pack, comprising the following steps:
[0066] Calculating the reference equalization current ratio between the single cells and battery packs of each batch; wherein, the batches include charging batches, working batches and rest batches;
[0067] Calculate the actual balance current ratio between the single cell and the battery pack at each moment in any batch;
[0068] Execute the...
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The invention discloses a battery pack active equalization control method, system and device. The method comprises the following steps: calculating a reference equalization current ratio between a single battery and a battery pack in each batch; calculating an actual balanced current ratio between the cell and the battery pack at each time point in any batch; executing a preset tracking algorithmso that the actual equalization current ratio can track the reference equalization current ratio of the corresponding batch in real time; according to the tracking result, equalizing the battery pack.The system comprises a first calculation module, a second calculation module, a tracking module and an equalization control module. The device includes a memory and a processor. The invention can realize high-efficiency active balance to the lithium iron phosphate battery, and has wide application range. The invention also improves the consistency among the individual cells in the battery pack, can prolong the life of the battery pack, and can be widely used in the field of battery management technology.
Description
technical field [0001] The invention relates to the technical field of battery management, in particular to a battery pack active equalization control method, system and device. Background technique [0002] Due to the limitations of manufacturing technology, during the long-term use of the battery pack, the temperature difference between the battery cells in the pack will gradually increase, which will lead to strong inconsistencies in the single cells in the battery pack, and according to the wooden barrel Effect, the single battery with the worst performance determines the performance of the entire pack of batteries; in addition, the overall aging speed of the battery pack with poor consistency is also faster, resulting in a low battery life. [0003] In order to alleviate the barrel effect, the existing technology is to actively balance the battery pack. Active balancing refers to transferring the remaining energy of a single battery in the battery pack to another single...
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IPC IPC(8): H02J7/00H01M10/44
CPCH01M10/441H02J7/0014H02J7/005H01M10/425H01M2010/4271H01M2010/4278G01R31/392G01R31/3648G01R31/3842G01R31/396Y02E60/10H02J7/0013
Inventor 唐晓鹏夏永晓邹长福胡文贵贺振伟姚科高福荣
Owner GUANGZHOU HKUST FOK YING TUNG RES INST