Parallel battery charging and discharging control system and control method thereof
A charge and discharge control and control method technology, which is applied to the parallel battery charge and discharge control system and its control field, can solve the problems of battery life reduction, differences, accidents, etc., and achieve the effect of avoiding life reduction
Pending Publication Date: 2022-07-29
湖南湘源微能电力科技有限公司
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Problems solved by technology
Especially after the battery has been in operation for a certain period of time, there will be differences in the performance of the battery packs. When the battery is deeply discharged after an AC loss, and then recharged, the battery with the lowest voltage may withstand a charging current exceeding 10C for a short time. If the BMS fails to perform protection correctly or opens the circuit, it may cause battery damage, and serious cases may lead to accidents
[0004] Since the lithium batteries are directly connected in parallel, when the power supply system finds that one of the batteries has poor performance and is overcharged during the charging process, it has to stop charging all the batteries, resulting in insufficient capacity of the other batteries, thereby reducing the overall battery life.
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[0030] In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. The embodiments described above are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application should fall within the protection scope of the embodiments of the present application.
[0031] The specific implementation of the embodiments of the present application is further described below with reference to the accompanying drawings of the embodiments of the present application.
[0032] see figure 2 , in a specific implementation of the present application, ...
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The invention provides a parallel battery charging and discharging control system which comprises a plurality of battery packs connected in parallel, each battery pack is connected with a charging loop and a discharging loop, and the charging loop and the discharging loop corresponding to any battery pack are isolated from the charging loops and the discharging loops corresponding to other battery packs. Each battery pack is provided with a charging and discharging control unit which is used for controlling on or off of each charging loop, and each charging loop and each discharging loop are respectively connected with two buses. According to the parallel battery charging and discharging control system, the charging loop and the discharging loop corresponding to each battery pack are isolated from the charging loops and the discharging loops corresponding to other battery packs, so that each battery pack can independently charge and discharge, and the problem of battery loop is thoroughly solved; and the batteries cannot form a loop through the same bus.
Description
technical field [0001] The embodiments of the present application relate to the technical field of battery management, and in particular, to a parallel battery charge and discharge control system and a control method thereof. Background technique [0002] In order to meet the needs of large-capacity backup power, the traditional design scheme is to directly use a single group of batteries of the same specification in parallel. We take 600AH backup power as an example. The parallel structure of the traditional design scheme is as follows: figure 1 shown. In this traditional architecture solution, the lithium battery is in the charging state for a long time, and the battery is charged and protected by the BMS circuit inside the battery. When the battery capacity is full, the BMS cuts off the charging circuit. When the charging current is greater than the BMS setting value, the BMS will perform a current limiting function to limit the battery charging current to protect the b...
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IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/00036H02J7/0013H02J7/0047H02J7/0068H02J7/0031H02J7/0036H02J7/00302H01M10/441
Inventor郭凤泽龚石斌
Owner湖南湘源微能电力科技有限公司