A SOC balance control device and method for a battery module
A technology of battery module and equalization control, applied in battery circuit devices, circuit devices, charge equalization circuits, etc., which can solve problems such as inconsistency in current rate and temperature, inconsistency in SOC and internal resistance, insufficient utilization of energy storage system capacity, etc. Achieve the effect of speeding up the SOC equalization speed and improving the equalization effect
Active Publication Date: 2022-03-08
WENZHOU POLYTECHNIC
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Problems solved by technology
Due to the limitations of the manufacturing process and the use process, there are often inconsistencies between battery packs connected in series, resulting in inconsistencies in the discharge current rate and temperature of each cell during the use of the battery pack, which in turn increases the SOC and internal resistance between cells as a positive feedback inconsistencies
This difference will cause damage to individual battery packs due to overcharging or over-discharging, making the capacity of the energy storage system not fully utilized, affecting the overall performance and service life of the battery pack, and even causing an explosion in severe cases
Method used
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[0053] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top "Face", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
[0054] refer to Figure 1 to Figure 6 As shown, in order to achieve the above purpose, the present invention provides the following technical solution: a SOC balance control device for a battery module, including: a battery module selector 1, a boost converter 2, a regeneration switch 3, a mode selector 4, Charging standby switch 5, data acquisition module, state calculation module, and switch action control module;
[0055] The battery module selector...
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The invention discloses an SOC balance control device for a battery module. The key points of the technical solution include: a battery module selector, a boost converter, a regeneration switch, a mode selector, and a charging backup switch; the battery module selector and the boost converter The converter is connected; the battery module selector includes multiple groups of battery packs, and the regenerative switch is respectively connected with the battery module selector and the boost converter to make the boost converter reversely charge the battery pack; the charging standby switch is connected with the boost converter The voltage converter is connected to act as a backup power supply for the boost converter; the mode selector is connected to the charging backup switch, the boost converter, and the battery module selector respectively for switching the power supply mode. The balance control device can allow the battery to perform battery SOC balance while charging the load, and both the balance speed and the balance efficiency have been greatly improved.
Description
technical field [0001] The invention relates to the field of battery energy storage, and more specifically, it relates to an SOC balance control device and method for battery modules. Background technique [0002] As an effective measure to improve the ability of the power system to accommodate large-scale new energy generation, battery energy storage technology has always been a research hotspot. With the gradual increase in the penetration rate of new energy power generation in the power grid, the capacity of energy storage systems has gradually developed from the kW level in the past to the 100 MW level in recent years. [0003] Lithium-ion batteries are widely used in electric vehicles due to their low self-discharge rate, high battery voltage, high charging efficiency, no memory effect, and high energy density. In order to achieve higher output voltage and larger capacity, many battery packs need to be connected in series and parallel. However, the manufacturing proce...
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IPC IPC(8): H01M10/42H01M10/44H02J7/00
CPCH01M10/4207H01M10/425H01M10/4257H01M10/441H02J7/0014H02J7/0019H02J7/0016H02J7/0063H01M2010/4271Y02E60/10
Inventor 高强胡文飞赵江武王宁
Owner WENZHOU POLYTECHNIC