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A topology and control method for shift balance of lithium-ion power batteries used in electric ships

A power battery and balance control technology, applied in electric vehicles, charge equalization circuits, battery circuit devices, etc., can solve the problems of insignificant equalization effect, low equalization efficiency, long equalization time, etc., to avoid the "barrel" effect, Equalization effect is obvious, the effect of equalization efficiency is high

Active Publication Date: 2021-10-15
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of conventional equalization technology, such as insignificant equalization effect, long equalization time, low equalization efficiency, and complicated control, the present invention provides an electric marine lithium-ion power plant with high efficiency, simple equalization control, and obvious equalization effect. Battery shift balance topology and control method

Method used

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  • A topology and control method for shift balance of lithium-ion power batteries used in electric ships
  • A topology and control method for shift balance of lithium-ion power batteries used in electric ships
  • A topology and control method for shift balance of lithium-ion power batteries used in electric ships

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Embodiment Construction

[0020] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further clarified below in conjunction with specific embodiments and accompanying drawings.

[0021] Such as figure 1 , figure 2 As shown, the present invention is a lithium-ion power battery rotation balance topology for electric ships, including a plurality of battery clusters 1, the battery clusters 1 are directly connected in parallel to the DC bus, and each battery cluster 1 includes a plurality of battery modules 11 connected in series. Each battery module 11 includes a battery pack 110, each battery pack 110 is connected in series with a MOS transistor Q1111 with a reverse diode D1 112, and then a MOS transistor Q2 113 with a reverse diode D2 114 is connected in parallel.

[0022] In the control method of the present invention, by controlling a certain MOS transistor Q1 111 to be turned on and a MOS trans...

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Abstract

The invention discloses a lithium-ion power battery rotation balance topology for electric ships, which includes multiple (≥2) battery clusters directly connected in parallel on the DC bus, and each battery cluster is composed of multiple (≥2) battery modules connected in series , each battery module includes a battery pack, the battery pack is composed of 1 to 3 single cells in series, each battery pack is connected in series with a MOS transistor Q1 with a reverse diode D1 and then connected in parallel with a reverse diode D2 The MOS tube Q2 is also disclosed; the control method is also disclosed; the invention can realize the shift balance between the series battery modules inside the battery cluster and the balance control between the parallel battery clusters, and has a high degree of modularization and high balance efficiency, and can maximize The charging and discharging power of the power battery can avoid the "barrel" effect caused by the inconsistency of the battery.

Description

technical field [0001] The invention belongs to the technical field of management and control in lithium-ion battery systems for electric ships, and specifically relates to a topology and control method for shift balance of lithium-ion power batteries for electric ships, which is suitable for the management and control of lithium-ion battery systems for electric ships, especially for batteries System balance control. Background technique [0002] With the development of new energy technology and the policy requirements of green and environmental protection, green electric ships have attracted much attention. Due to its high energy density, green environmental protection, and mature industrial chain, lithium-ion power batteries have become the first choice for batteries for electric ships. At present, many manufacturers at home and abroad have carried out relevant research on lithium-ion power batteries for electric ships, and have carried out actual ship demonstrations. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
CPCH02J7/0016H02J7/0019
Inventor 丁玉峰聂巍李围徐进李霞林
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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