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Method for simulating electrochemical corrosion caused by contact of battery cathode and housing

A technology of shell contact and simulated battery, which is applied in the fields of weather resistance/light resistance/corrosion resistance, scientific instruments, measuring devices, etc. It can solve problems such as failure, trouble, and poor manufacturing, so as to reduce the proportion of failures and reduce safety accidents The occurrence and the effect of optimizing product design

Inactive Publication Date: 2019-05-10
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical methods are generally caused by poor manufacturing process control and improper external use. Once they occur, they will fail in a short time; There will be no obvious failure inside, which brings some confusion and confusion to troubleshooting
[0004] At present, there is no systematic analysis method and conclusion for the electrochemical corrosion problem caused by the contact of the negative electrode case.

Method used

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  • Method for simulating electrochemical corrosion caused by contact of battery cathode and housing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of method that the present invention proposes to simulate the electrochemical corrosion caused by the contact of the negative electrode shell of the battery comprises the following steps:

[0021] S1. Connect a 0Ω resistor in series between the negative pole of the battery and the case, and connect by welding or riveting;

[0022] S2. Select a suitable incubator and adjust the temperature in the incubator to 25°C;

[0023] S3. Put the square battery upright and place it in the incubator with the cover facing upwards;

[0024] S4. Regularly observe the state of the battery case, record the time t when the case is corroded and damaged, and calculate the corrosion rate υ of the case material according to the case material, thickness d, etc., υ=t / d.

Embodiment 2

[0026] A kind of method that the present invention proposes to simulate the electrochemical corrosion caused by the contact of the negative electrode shell of the battery comprises the following steps:

[0027] S1. Connect a 500Ω resistor in series between the negative pole of the battery and the case, and connect by welding or riveting;

[0028] S2. Select a suitable incubator and adjust the temperature in the incubator to 25°C;

[0029] S3. Put the square battery upright and place it in the incubator with the cover facing upwards;

[0030] S4. Regularly observe the state of the battery case, record the time t when the case is corroded and damaged, and calculate the corrosion rate υ of the case material according to the case material, thickness d, etc., υ=t / d.

Embodiment 3

[0032] A kind of method that the present invention proposes to simulate the electrochemical corrosion caused by the contact of the negative electrode shell of the battery comprises the following steps:

[0033] S1. Connect a 500Ω resistor in series between the negative pole of the battery and the case, and connect by welding or riveting;

[0034] S2. Select a suitable incubator and adjust the temperature in the incubator to 45°C;

[0035] S3. Place the square battery in the incubator with the cover plate perpendicular to the horizontal plane and fixed on its side;

[0036] S4. Regularly observe the state of the battery case, record the time t when the case is corroded and damaged, and calculate the corrosion rate υ of the case material according to the case material, thickness d, etc., υ=t / d.

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Abstract

The invention discloses a method for simulating electrochemical corrosion caused by contact of a battery cathode and a housing and relates to the technical field of failure model effectiveness analysis in the battery application process. The method comprises the following steps: connecting a resistor between the cathode and the housing of a lithium ion battery in series; then, fixedly placing thebattery in a temperature box; observing the state of the battery housing, and recording corrosion and damage time of the housing; and calculating corrosion rate of the housing according to housing material and thickness. The method can obtain electrochemical corrosion rate under different environmental temperatures and placement modes and the like through orthogonal test design, so that time of housing corrosion and liquid leakage of the battery can be estimated effectively under different cathode short circuit situations; and with the support of such conclusion, on the one hand, safety and reliability of the battery in the whole life cycle can be evaluated, and product design can be optimized; and on the other hand, a certain technical guidance can be provided for battery factory inspection so as to minimize the proportion of faults caused by electrochemical corrosion and liquid leakage in the market and reduce occurrence of safety accidents.

Description

technical field [0001] The invention relates to the technical field of failure mode analysis in the battery application process, in particular to a method for simulating the electrochemical corrosion caused by the contact of the battery negative shell. Background technique [0002] The rapid development of the new energy vehicle industry has brought about explosive growth in the secondary battery industry. As the core component of new energy vehicles, the sales and loading of secondary batteries are also increasing year by year. Even an excellent battery company can hardly guarantee that the products going to the market will not have any quality problems. In the face of various vehicle failures caused by battery failures in the market, battery companies will inevitably bear a certain amount of pressure. This is also a new It is one of the great tests faced by the energy automobile industry in an environment where policy guidance is gradually withdrawn. [0003] One of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02G01N17/00
Inventor 熊辉厉运杰丁浩
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY