Multi-path selection battery electric quantity balance control method and device
A battery power and balance control technology, applied in battery circuit devices, circuit devices, charge balance circuits, etc., can solve the problems of inconsistent Coulomb efficiency, inconsistent battery self-discharge rate, and high complexity of power balance solutions, and improve work stability. , the effect of improving the balance
Active Publication Date: 2022-05-10
XIAN TECH UNIV
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Problems solved by technology
[0003]Because of the battery manufacturing and chemical screening process before leaving the factory, it is impossible to guarantee that the parameters of the single battery are consistent when leaving the factory; There is a certain difference in temperature, which leads to inconsistent battery self-discharge rates; at the same time, during the charging and discharging process of parallel or series battery packs, the coulombic efficiency of each cell is inconsistent due to the inconsistent environment of each cell, and the actual charge capacity of different cells of the battery and discharge capacity will vary
[0004]The existing battery balancing scheme is relatively complex, and it is necessary to design a control method and system with a simple structure to improve battery performance
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[0049]Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0050] The embodiment of the present invention proposes a battery power balance control method with multi-channel selection, which is applied to the use environment with two battery packs, and the two battery packs respectively include a plurality of battery cells, and the battery cells of the two battery packs are respectively set There is a corresponding route selection switch, and the route selection switch executes the closing or...
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The invention discloses a multi-path selection battery electric quantity balance control method and device, and the method comprises the steps: respectively controlling the switching-on of each path selection switch of a first battery pack according to a set first time interval, and respectively controlling the switching-on of each path selection switch of the first battery pack according to the set first time interval, the battery states of the two selected battery units are compared; based on a target relay of the electric quantity equalization circuit, under the condition that the relay does not act, recording the pair of battery units as a first state; and under the condition that the target relay acts, determining a to-be-balanced battery unit based on the connected battery units before and after switching of the routing switch, recording the to-be-balanced battery unit as a second state, and performing electric quantity balancing on the to-be-balanced battery unit based on the target relay. According to the method provided by the invention, the electric quantity can be balanced in advance, the state of the battery unit can be monitored without additional structural design, and the working stability of the battery unit is improved.
Description
technical field [0001] The invention relates to the technical field of batteries, in particular to a method and device for controlling battery power balance with multiple selections. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, new energy technology is in a stage of rapid development, and the demand for new energy technology in the world is also more urgent. Due to the advantages of high voltage, high energy density, long cycle life, good safety performance, and low self-discharge, lithium batteries have been widely used in large-scale application environments such as aerospace, military industry, and renewable energy system energy storage. Generally, batteries for energy storage need to be used by connecting a large number of single batteries in series or in parallel. [0003] Due to the manufacturing and chemical screening process of the battery before leaving the factory, it is impossible to guarantee that the par...
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IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/0014H02J7/0019H01M10/441
Inventor 沙永杰王少颖王铁栓
Owner XIAN TECH UNIV