Energy storage system balancing method and control system
A technology of energy storage system and equalization method, which is applied in the direction of charge equalization circuit, circuit monitoring/indication, secondary battery charging/discharging, etc., which can solve the problems of slow charging and discharging speed, accelerated decay of monomer performance, inconsistency, etc., and achieve improvement The effect of voltage consistency, prolonging service life, and improving charge and discharge efficiency
Pending Publication Date: 2022-04-26
SUZHOU TOPRUN ELECTRIC EQUIP
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Problems solved by technology
Due to the inconsistency of voltage, capacity and internal resistance of each energy storage unit in the process of manufacture and use, one or more energy storage units in a group of energy storage units in series always charge and discharge faster than other energy storage units. Can monomers be faster or slower, leading to inconsistencies
This inconsistency will affect the overall charge and discharge efficiency of the energy storage system, and as the inconsistency between the energy storage cells is gradually amplified during use, it will lead to accelerated decay of the performance of some cells, and then affect the energy storage unit. body life
Method used
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[0057] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the drawings and specific embodiments are only exemplary, and should not be construed as limiting the protection scope of the present invention.
[0058] Such as figure 1 As shown, the embodiment of the present application provides an energy storage system balancing method, including:
[0059] Step 100, the system is powered on, and data sampling is performed on each energy storage unit;
[0060] Step 200, process the data, obtain the average value as the reference voltage, and obtain the difference ΔU between each energy storage unit and the reference voltage;
[0061] Step 300, judging the running state of the energy storage system, and judging whether it is in a static state;
[0062]Step 310, if it is in a static state, compare the voltage U 1 Take 30mV, hysteresis value U 2 Tak...
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The invention provides an energy storage system balancing method and a control system. The method comprises the following steps: performing data sampling on each energy storage monomer; processing the data, solving a reference voltage, and solving a difference value delta U between each energy storage monomer and the reference voltage; setting a comparison voltage U1; when delta U is greater than or equal to U1, the passive equalization circuit is switched on, and the energy storage monomer is discharged; and when delta U is less than or equal to-U1, the active equalization circuit is switched on to charge the energy storage monomer. Whether equalization needs to be carried out or not is judged through the difference value between each energy storage single body and the reference voltage, and real-time dynamic adjustment can be achieved; through passive equalization during overvoltage and active equalization during undervoltage, the voltage consistency of each energy storage monomer can be improved, so that the overall charging and discharging efficiency is improved, and the service life of the energy storage monomer is prolonged.
Description
technical field [0001] The invention relates to energy storage unit management technology, in particular to an energy storage system equalization method and a control system. Background technique [0002] An energy storage system consists of multiple energy storage units (such as batteries or supercapacitors) connected in series. Due to the inconsistency of voltage, capacity and internal resistance of each energy storage unit in the process of manufacture and use, one or more energy storage units in a group of energy storage units in series always charge and discharge faster than other energy storage units. energy monomers faster or slower, leading to inconsistencies. This inconsistency will affect the overall charge and discharge efficiency of the energy storage system, and as the inconsistency between the energy storage cells is gradually amplified during use, it will lead to accelerated decay of the performance of some cells, and then affect the energy storage unit. bod...
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Login to View More IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/0016H02J7/0047H01M10/441Y02E60/10
Inventor 皇甫海文黄贵江孙林波王鹏
Owner SUZHOU TOPRUN ELECTRIC EQUIP