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Lithium ion battery thermal performance testing method

A lithium-ion battery and testing method technology, applied in calorimeters, measuring devices, measuring heat, etc., can solve the problem of inability to obtain the change of the heating power of the lithium-ion battery with time, the inability to accurately judge the cycle life and safety of the power battery pack , affecting the widespread promotion and application of lithium-ion batteries, etc., to achieve the effect of improving market application prospects, low testing costs, and significant production and practical significance

Inactive Publication Date: 2013-02-27
TIANJIN LISHEN BATTERY
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Problems solved by technology

[0004] However, at present, there is no ideal test method for the heat generation of lithium-ion batteries during discharge. The existing methods are expensive to test, and it is impossible to obtain the change of heat generation power of lithium-ion batteries over time.
Therefore, battery manufacturers cannot accurately grasp the thermal performance data of the battery, and thus cannot make accurate judgments on the cycle life and safety of the power battery pack, which affects the widespread application of lithium-ion batteries

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  • Lithium ion battery thermal performance testing method

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Embodiment Construction

[0039] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0040] see figure 1 , the present invention provides a method for testing the thermal performance of a lithium-ion battery. By testing the heating power of a lithium-ion battery during discharge, the variation of heating power with discharge time, and the total heating value, battery manufacturers can Accurately grasp the thermal performance data of lithium-ion batteries during discharge, and then make accurate judgments on the cycle life and safety of power battery packs. The method specifically may include the following steps:

[0041] Step S101: Fully charge the battery, put it into an incubator after cooling (for example, an incubator that can be adjusted within the temperature range of 5-35°C, and when a certain temperature is selected...

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Abstract

The invention discloses a lithium ion battery thermal performance testing method. The method comprises the steps of: placing a fully-charged battery in a constant-temperature box, and detecting an open-circuit voltage and the surface temperature of the battery in real time; carrying out discharging operation by a preset current until the battery is discharged to a preset charge state; detecting the open-circuit voltage and the surface temperature of the battery at different discharge time points until the battery charge state is equal to zero to obtain an actual open-circuit voltage and an actual open-circuit voltage temperature coefficient B of the battery; discharging the fully-charged battery, and detecting a work voltage U and the surface temperature T of the battery in real time at different discharge time points; and calculating the heating power P of the battery at different discharge time points. The lithium ion battery thermal performance testing method disclosed by the invention can conveniently and reliably test the thermal performance of the lithium ion battery during discharge, and can accurately acquire the heating power, the change of heating power over time and the total heating amount of the lithium ion battery during discharge.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for testing the thermal performance of lithium-ion batteries. Background technique [0002] At present, lithium-ion batteries have many advantages such as long service life, harmless to the environment, high specific energy, high specific power, and high conversion rate. They are not only widely used in portable electronic devices such as mobile phones, digital cameras, and laptop computers, but also Widely used in large and medium-sized electric equipment such as electric vehicles, electric bicycles and electric tools. [0003] Lithium-ion batteries are particularly favored in manufacturers of electric vehicles and electric mopeds. In the application of power battery packs, the thermal performance of lithium-ion batteries is an important factor affecting the cycle life and safety of battery packs. [0004] However, at present, there is no ideal test method for the ...

Claims

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Application Information

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IPC IPC(8): G01N25/20G01K17/00
Inventor 翟文波
Owner TIANJIN LISHEN BATTERY
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