Method and device for calculating temperature rise of metal parts overcurrent

A metal parts, overcurrent technology, applied in computing, electrical digital data processing, instruments, etc., can solve problems such as waste of resources and increased manufacturing costs

Active Publication Date: 2019-02-26
深圳市矿鑫发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of determining metal parts based on the empirical value of temperature rise is likely to cause waste of resources and increase manufacturing costs

Method used

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  • Method and device for calculating temperature rise of metal parts overcurrent
  • Method and device for calculating temperature rise of metal parts overcurrent
  • Method and device for calculating temperature rise of metal parts overcurrent

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Embodiment Construction

[0009] An embodiment of the present invention provides a method for calculating the temperature rise of the overcurrent of a metal part. The method is based on Joule's law, specific heat capacity formula and Newton's cooling law, combined with the law of conservation of energy, and determines the metal part through the determined relevant parameters about the metal part. The temperature rise of the component when the overcurrent occurs.

[0010] In this embodiment, according to the energy Q1 generated by the current passing through the conductor due to impedance (i.e. Joule's law), the heat energy Q2 transformed into a conductor (i.e. the specific heat capacity formula), and the energy Q3 lost by heat transfer of external substances (i.e. Newton's cooling law), we can obtain Come up with the following three equations:

[0011] Q 1 = I 2 Rt,

[0012] Q 2 = cmΔT,

[0013] Q 3 =KFΔT * t.

[0014] Among them, I is the current value passing through the metal part, R is the ...

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Abstract

The invention discloses a temperature rise computing method and device for metal part overcurrent. The method comprises: determining parameters, wherein the parameters include the value of current passing through a metal part, a heat transfer coefficient of an environment for the metal part, and the resistivity, specific heat capacity, density, cross sectional area and perimeter corresponding to the cross sectional area of the metal part; according to Joule's law, a specific heat capacity formula and Newton's law of cooling, and through the combination with the parameters, computing the temperature rise within preset monitoring time under the condition that the time of metal part overcurrent is long enough. The invention has the benefit of providing the temperature rise computing method and device for metal part overcurrent, so that the temperature rise of the metal part can be determined through computing after being used with overcurrent for different periods of time, and then the suitability of the use of the metal part can be immediately evaluated.

Description

technical field [0001] The invention relates to the technical field of lithium battery testing applications, in particular to a method and device for calculating the temperature rise of an overcurrent of a metal part. Background technique [0002] Lithium-ion batteries (referred to as lithium batteries) have the advantages of high operating voltage, wide operating temperature, and long cycle life, and have been widely used. Especially in recent years, lithium batteries have developed rapidly as vehicle power supplies. Lithium batteries are mainly composed of positive and negative active materials, electrolyte, and a diaphragm to prevent short-circuiting of the positive and negative electrodes. Usually, the positive and negative active materials are coated on the aluminum and copper foil current collectors, and then the separator is interposed between the positive and negative current collectors to make batteries directly by lamination or winding, and the batteries are packed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 申智渊刘桐仁
Owner 深圳市矿鑫发展有限公司
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