Lithium ion battery capacity screen-out device

Abstract

The invention relates to a lithium ion battery capacity screen-out device. The lithium ion battery capacity screen-out device comprises at least one lithium ion battery capacity screening-out unit which comprises a lithium ion battery B, a heating resistance wire Rt, a current limiting resistor R, a collecting resistor Rf, a collecting resistor Rad and a current transformer T. The lithium ion battery B, the heating resistance wire Rt, the current limiting resistor R and the current transformer T are connected in series to form a loop, the collecting resistor Rad is connected with the current transformer T in parallel, and meanwhile the collecting resistor Rf is connected with the lithium ion battery B in parallel. By means of the lithium ion battery capacity screen-out device, multiple lithium ion batteries with approximate capacities can be screened out and are connected in series or in parallel to be used, the consistency of the capacity of the single lithium ion battery in a lithium ion battery set can be better, the using efficiency of the lithium ion battery set is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery performance parameter detection, in particular to a lithium-ion battery capacity sorter. Background technique [0002] In the application of new energy products, lithium-ion batteries are mostly connected in series and / or in parallel to form lithium-ion battery packs. If the capacity consistency of the lithium-ion batteries that make up the lithium-ion battery pack is not good, then charging During the discharge process, the difference between the capacities of lithium-ion batteries will be increased, which will easily cause some lithium-ion batteries to be overcharged or over-discharged, while the performance of the other part of lithium-ion batteries will not be fully utilized, which will eventually lead to the failure of the lithium-ion battery pack. Performance degrades and decays or fails quickly. [0003] Therefore, in order to make better use of lithium-ion batteries, it is nec...

AI Technical Summary

Problems solved by technology

[0002] In the application of new energy products, lithium-ion batteries are mostly connected in series and / or in parallel to form lithium-ion battery packs. If the capacity consistency of the lithium-ion batteries that make up the lithium-ion battery pack is not good, then charging During the discharge process, the difference between the capacities of lithium-ion batteries will be increased, which will easily cause some lithium-ion batteries to be overcharged or over-discharged, while the performance of the other part of lithium-ion batteries will not be fully utilized, which will eventually lead to the failure of the lithium-ion battery pack. Performance degrades and quickly decays or fails

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