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A control method for lithium battery electrodes

A lithium battery and electrode technology, which is applied in the field of regulation of lithium battery electrodes, can solve the problems that electrodes are prone to dendrites and decrease in charge and discharge efficiency, so as to improve the charge and discharge efficiency and service life, suppress the generation of barrier layers, and improve The effect of disorder

Active Publication Date: 2022-05-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems that dendrites are easily generated on the electrodes during the use of the existing lithium batteries, and an ion barrier layer is easily formed between the two electrodes, resulting in a decrease in charge and discharge efficiency, etc., the present invention provides a method for regulating the electrodes of lithium batteries

Method used

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  • A control method for lithium battery electrodes
  • A control method for lithium battery electrodes
  • A control method for lithium battery electrodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Purchase commercially available Shenzhen Lidian CR2032 lithium-manganese battery (standard battery capacity 240mAh) as the subject of the test to carry out the technical solution test of the present invention. The CR2032 lithium-manganese battery selected in this embodiment is the same batch and has been stored for 8 months new unopened batteries.

[0047] A total of 80 CR2032 lithium-manganese batteries were numbered, respectively numbered S1C1 to S1C40 and S1N1 to S1N40, and the 80 CR2032 lithium-manganese batteries numbered above were compared and tested. Wherein, a promoting magnetic field is applied to batteries numbered from S1C1 to S1C40. When applying a promoting magnetic field to the battery, first set two symmetrical electromagnets outside the CR2032 lithium-manganese battery, and use the source magnetic field generated by the two symmetrical electromagnets as the promoting magnetic field acting on the electrodes of the CR2032 battery, and α is 45° (after cal...

Embodiment 2

[0057] The commercially available Shenzhen Yunkai LIR1220 battery (a secondary lithium battery with a standard battery capacity of 8mAh) was selected as the subject of the test to carry out the technical solution test of the present invention. The LIR1220 battery used in this example was the same batch and had been stored for 11 months new unopened batteries.

[0058] First, set two symmetrical DC electromagnets outside the LIR1220 battery, use the AC electromagnet to form a time-varying electromagnetic field with a magnetic field strength of -3.2~3.2T, use the DC electromagnet to form a constant magnetic field, and overlap the constant magnetic field with some areas to form a magnetic field strength of 5.3~ The promotion magnetic field of 5.5T, the promotion magnetic field acts on the electrodes of the LIR1220 battery, the magnetic field α is 0°≤α<90°, and S8C1 to S8C10 are respectively placed in the promotion magnetic field for detection, and at the same time, S8N1 to S8N1 to...

Embodiment 3

[0070] Two market-bought Rip Lithium CB7914897 electric car batteries (nominal capacity 120Ah) were selected as test subjects to carry out the technical scheme test of the present invention. Unopened battery.

[0071]Two CB7914897 batteries are respectively numbered as S3C1 and S3N1, and a coil is wound outside the S3C1 battery and energized to form an electromagnet. Different magnetic field strengths can be formed through the amount of coil energization, and the electrodes inside the S3C1 battery can be promoted. A magnetic field, and the strength of the magnetic field that promotes the magnetic field is adjustable. The resulting promoting magnetic field α=42° (considering the divergence of the magnetic field, 0°≦α<90°).

[0072] Carry out performance testing on S3C1 and S3N1, the specific testing includes the following:

[0073] 1) The coil passes through alternating current to form a time-varying electromagnetic field and cooperates with two strong permanent magnets to fo...

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Abstract

The invention relates to the technical field of battery optimization, in particular to a method for regulating and controlling lithium battery electrodes. The method is to apply a source magnetic field to the lithium battery, use the source magnetic field acting on the surface of the electrode as a promoting magnetic field, control lithium deposition through the promoting magnetic field applied on the electrode surface, and regulate the electrode. The invention can well control the system environment within a certain range of the electrode surface by applying a promoting magnetic field, and improve the disorder of the movement of charged particles; it can avoid the generation of concentration differences within a certain range of the electrode surface, thereby inhibiting the generation of barrier layers and lithium The growth of dendrites; can improve the charging and discharging efficiency and service life of lithium batteries; has a wide range of applicability.

Description

technical field [0001] The invention relates to the technical field of battery optimization, in particular to a method for regulating and controlling lithium battery electrodes. Background technique [0002] Batteries are one of the most common and used tools in daily life. They are classified into mercury batteries, lead-acid batteries, zinc-manganese batteries, lithium batteries, etc. according to their composition, and can be divided into Primary battery / primary battery, secondary battery / rechargeable battery, etc. For electrical equipment such as new energy electric vehicles, TV remote controls, mobile phones, electronic watches, wireless keyboards, wireless mice, laptops, and electric toothbrushes, etc., they usually select appropriate types of batteries according to their needs, such as new energy electric vehicles, Mobile phones and the like mostly use secondary batteries, while some electronic watches use secondary batteries and some use primary batteries, and TV re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/44H01M10/052
CPCH01M10/4235H01M10/446H01M10/448H01M10/052Y02E60/10
Inventor 唐谊平侯广亚
Owner ZHEJIANG UNIV OF TECH