Method and system for intelligent battery cell matching
A battery cell and grouping technology, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as capacity reduction, cycle life attenuation, and affecting the safe use of lithium-ion batteries, and achieve voltage balance and long service life.
Active Publication Date: 2019-05-10
苏州索尔智行新能源科技有限公司
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Problems solved by technology
At present, in the lithium-ion battery production industry, it is common for the charging and discharging performance, cycle life and safety performance of single lithium-ion batteries to meet industry, national and international industry technical standards. However, once multiple single batteries are combined in a certain way When used together (such as in series), the technical parameters (voltage, capacity, internal resistance, etc.) of each single battery do not match due to the consistency of the manufacturing process, which further causes the ohmic polarization impedance inside the battery and participates in the battery reaction. The difference in the transmission impedance of the material, if the difference is too large, will inevitably result in uneven real-time voltage distribution of each single battery when the battery pack is working, resulting in overcharge or overdischarge, resulting in deterioration of battery pack performance, such as capacity decline, cycle life Rapid attenuation, what's more, it will affect the safe use of lithium-ion batteries and other issues
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[0019] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0020] combine figure 1 As shown, the battery cell intelligent grouping method combines multiple cells into n groups, including:
[0021] Obtain the voltage value of all batteries, and code or number the single batteries;
[0022] At the xth time of grouping, take out the n cells with the lowest voltage value among the cells to be grouped, and assign them to the xth group to the nth group, and the 1st group to the xth group according to the voltage value from ...
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The present application discloses a method and system for intelligent grouping of battery cells, the method comprising: obtaining the voltage values of all battery cells; and taking out the n battery cells with the lowest voltage values among the battery cells to be grouped at the xth time of grouping , and according to the voltage value from low to high, it is assigned to the xth group to the nth group, and the first group - the x-1 group; the grouping is completed after all the batteries are assembled or the number of remaining batteries is less than n. . The method of the invention can balance the voltage of each group of battery cores and ensure that each group of batteries has a longer service life.
Description
technical field [0001] The present application relates to the technical field of lithium-ion battery manufacturing, in particular to a method and system for intelligent battery cell assembly. Background technique [0002] As a new type of energy storage device, lithium-ion batteries have attracted more and more attention because of their advantages such as high specific energy, high specific power, high working voltage, low self-discharge, good cycle performance and friendly manufacturing environment. . At present, in the lithium-ion battery production industry, it is common for the charging and discharging performance, cycle life and safety performance of single lithium-ion batteries to meet industry, national and international industry technical standards. However, once multiple single batteries are combined in a certain way When used together (such as in series), the technical parameters (voltage, capacity, internal resistance, etc.) of each single battery do not match d...
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IPC IPC(8): H01M10/058H01M10/42
CPCH01M10/058H01M10/4207Y02E60/10Y02P70/50
Inventor 季伟源王乾朱景国
Owner 苏州索尔智行新能源科技有限公司