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Lithium battery service life pre-estimation method and device

A lithium battery, life-span technology, applied in battery/fuel cell control devices, measuring devices, measuring electricity, etc., can solve problems such as inaccurate battery life prediction

Inactive Publication Date: 2016-09-28
HUATING HEFEI POWER TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] In view of this, an embodiment of the present invention provides a lithium battery life estimation method and device, so as to improve the problem of inaccurate prediction of battery life by the above-mentioned existing lithium battery life estimation method

Method used

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  • Lithium battery service life pre-estimation method and device
  • Lithium battery service life pre-estimation method and device
  • Lithium battery service life pre-estimation method and device

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no. 1 example

[0038] figure 2 It shows the lithium battery life estimation method provided by the first embodiment of the present invention, please refer to figure 2 , the method includes:

[0039] Step S110: Obtain the relationship between the cycle capacity decay rate of the lithium battery and the usage conditions.

[0040] In this embodiment, the lithium battery referred to in this step may be a lithium battery used for testing. The lithium battery used for the test is the same lithium battery as the lithium battery whose service life needs to be estimated in the embodiment of the present invention. In this step, the number of lithium batteries used for testing is not limited, and users can use them according to actual testing needs.

[0041] In this embodiment, the service conditions are the ambient temperature of the corresponding lithium battery during the test and its charging cut-off voltage.

[0042] Specifically, such as image 3 As indicated, this step may include:

[00...

no. 2 example

[0133] Such as Figure 14 It shows the lithium battery life estimation device 200 provided in this embodiment, the lithium battery life estimation device 200 can be used in lithium battery application fields such as electric vehicles, please refer to Figure 14 , the lithium battery life estimation device 200 includes:

[0134] The first relationship acquisition module 210 is used to acquire the relationship between the cycle capacity decay rate of the lithium battery and the use conditions;

[0135] The second relationship acquisition module 220 is used to acquire the relationship between the storage capacity decay rate of the lithium battery and the storage condition;

[0136] A calculation module 230, configured to calculate the cycle capacity decay rate and storage capacity decay rate of the lithium battery according to the usage conditions and storage conditions of the lithium battery;

[0137] The life estimation module 240 is configured to estimate the life of the lit...

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Abstract

The invention provides a lithium battery service life pre-estimation method and device. The lithium battery life pre-estimation method comprises steps of obtaining a relation between a cycling capacity attenuation rate and a usage condition of a lithium battery, obtaining a relation between a storage capacity attenuation rate and a storage condition of the lithium battery, calculating the cycling capacity attenuation rate and a storage capacity attenuation rate of the lithium battery and estimating the service life of the lithium battery according to the cycling capacity attenuation rate and the storage capacity attenuation rate of the lithium battery.

Description

technical field [0001] The present invention relates to the technical field of batteries, in particular to a lithium battery life estimation method and device. Background technique [0002] As the world pays more and more attention to energy saving and emission reduction, the development of electric vehicles has gradually occupied an important position in the automotive industry. As the main energy source of electric vehicles, power batteries are the key components of electric vehicles, and the performance of power batteries directly affects the application prospects of electric vehicles. Lithium batteries are mostly used as power batteries for electric vehicles. Capacity is the direct performance of many performance indicators of lithium batteries. Accurate prediction of battery capacity is of great significance to prolong the life of lithium batteries and fully exert their performance. [0003] Battery capacity attenuation is the encapsulation effect of reaction substance...

Claims

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Application Information

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IPC IPC(8): G01R31/36B60L11/18
CPCB60L58/16G01R31/36G01R31/382Y02T10/70
Inventor 李盼盼劳力王扬周鹏
Owner HUATING HEFEI POWER TECH
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