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
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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 t

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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Example

[0037] First embodiment

[0038] figure 2 The method for estimating the life of a lithium battery provided by the first embodiment of the present invention is shown, please refer to figure 2 , The method includes:

[0039] Step S110: Obtain the relationship between the cycle capacity attenuation 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 type of lithium battery as the lithium battery that 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 use them according to actual testing needs.

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

[0042] Specific, such as image 3 As shown, this step can inclu...

Example

[0132] Second embodiment

[0133] Such as Figure 14 The device 200 for estimating the life of a lithium battery provided by this embodiment is shown, and the device 200 for estimating the life of a lithium battery can be used in the application fields of lithium batteries such as electric vehicles. Please refer to Figure 14 , The lithium battery life estimation device 200 includes:

[0134] The first relationship obtaining module 210 is configured to obtain the relationship between the cycle capacity attenuation rate of the lithium battery and the usage conditions;

[0135] The second relationship obtaining module 220 is configured to obtain the relationship between the storage capacity decay rate of the lithium battery and storage conditions;

[0136] The calculation module 230 is configured to calculate the cycle capacity decay rate and storage capacity decay rate of the lithium battery according to the use condition and storage condition of the lithium battery;

[0137] The life es...

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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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