Cell die and method for rapid evaluating cell matching degree

A technology of battery mold and matching degree, which is applied in the direction of secondary battery manufacturing, electricity measurement, and electric variable measurement, to achieve great practical significance, accurate data, and simple operation

Active Publication Date: 2011-06-08
SHANGHAI PYLON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no public report on the use of this activation energy to evaluate the quality of the battery system

Method used

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  • Cell die and method for rapid evaluating cell matching degree
  • Cell die and method for rapid evaluating cell matching degree
  • Cell die and method for rapid evaluating cell matching degree

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Production of positive electrode sheet

[0038] For example, the positive electrode slurry using lithium iron phosphate material is evenly coated on aluminum foil, dried at 125°C for 1 hour, then rolled, and cut into positive electrode sheets with a diameter of 20 mm, each positive electrode sheet contains 20 mg of positive electrode active material. Pole pieces A, B, E, and F were prepared according to the above-mentioned steps using four kinds of slurries with different proportions and processes.

[0039] (2) Production of negative electrode sheet

[0040] For example, the negative electrode slurry using artificial graphite is evenly coated on the copper foil, pressed under the pressure of 2 MPa, heat-treated at 300°C for 24 hours under nitrogen, and then calendered, cut into a negative electrode sheet with a diameter of 21 mm , Each negative electrode sheet contains 15 mg of negative electrode active material. The pole pieces C and D were prepared according to ...

Embodiment 2

[0044] The same method and steps as in Example 1 were used to prepare the positive electrode, the negative electrode and the battery. The positive electrode used pole piece A, the negative pole used pole piece C, and the battery number was 1#.

Embodiment 3

[0046] The same method and steps as in Example 2 were used to prepare the battery, except that the negative pole was D, and the battery number was 2#.

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Abstract

The invention discloses a cell die and a method for rapid evaluating cell matching degree. The method is characterized by using a specified die to prepare simulated cells or half cells, utilizing a simplified Arrhenius empirical formula to test and compute the reaction activation energy when different pole pieces are combined in a specified temperature range, and establishing a standard for judging the pole matching degree according to the reaction activation energy so as to evaluate the performance of relevant poles effectively. The method is applicable to pole pieces prepared from anode material and cathode material of various lithium ion batteries, can be widely applied to process evaluation, raw material evaluation and the like, has simple procedures, is easy to operate, has rapid andaccurate data, and effectively reduces the material cost and time cost in relevant work. The invention also provides a cell die which is easy to assemble, has high accuracy and can be used repeatedly.

Description

technical field [0001] The invention relates to a battery mold, in particular to a mold used for battery testing. The invention also relates to a battery testing method, especially a method for quickly evaluating the matching degree of batteries. Background technique [0002] Green and environmentally friendly lithium-ion secondary batteries have been widely used in portable electronic products, communication tools, and electric tools in recent years, and have gradually become the power source of electric vehicles. For the ever-increasing performance requirements, excellent raw materials and optimized production processes are attracting more and more attention. In general experimental production, to evaluate the pros and cons of the battery design scheme or the pole piece process, the main method is to make the battery and test the battery performance, and determine the quality of the process and the pole piece by comparing the measured battery performance parameters. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04G01R31/36
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 陆卫忠朱广焱张军袁巍
Owner SHANGHAI PYLON TECH CO LTD
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