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Device for estimating degree of battery degradation, and estimation method

A level, battery technology, applied in the field of battery deterioration degree estimation device, can solve problems such as battery deterioration, driving performance reduction, and charge reduction

Active Publication Date: 2018-01-19
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With deterioration, the charge capacity at full charge decreases and the discharge characteristics deteriorate
If the battery installed in the vehicle deteriorates, it will lead to a decrease in driving performance

Method used

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  • Device for estimating degree of battery degradation, and estimation method
  • Device for estimating degree of battery degradation, and estimation method
  • Device for estimating degree of battery degradation, and estimation method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach -

[0018] As mentioned above, it is preferable to estimate the remaining battery life as accurately as possible. In addition, it is preferable that the estimated remaining life of the battery is not limited to the estimated remaining life of the in-vehicle use, and the remaining life of the battery during reuse (secondary use) after the on-vehicle use (primary use) is also preferably as accurate as possible. estimate. When the accuracy of estimating the remaining life of the battery at the time of recycling is low, it becomes inaccurate to plan the recycling of the battery for what purpose the battery can be reused for and how many years the battery can be used. As a result, once-used batteries for which no suitable recycling application can be found are handled as spare battery stocks, and inventory management costs increase. In addition, the secondary use refers to a battery that has been used in vehicles (primary use) as a fixed installation battery, or is mounted on a vehicl...

no. 2 approach -

[0073] Below, refer to Figure 10 The difference between the battery deterioration degree estimating device 100 of the second embodiment, in particular, and the first embodiment described so far will be described.

[0074] Figure 10 It is a block diagram showing the configuration of the battery deterioration degree estimating device 100 of the second embodiment. The battery deterioration degree estimating device 100 of the present embodiment differs from the first embodiment in that the storage deterioration estimating unit 120 acquires information on the storage deterioration degree at one time of use. In addition, along with this difference, the stored deterioration degree storage unit 122 included in the first embodiment is excluded from the configuration included in the battery deterioration degree estimating device 100 of the present embodiment.

[0075] First, similarly to the first embodiment, information on the degree of storage deterioration at one time of use is s...

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PUM

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Abstract

A device for estimating the degree of degradation of a battery is provided with: a storage degradation degree estimation unit for estimating the degree of degradation of the battery due to storage during re-use, on the basis of information pertaining to the degree of degradation of the battery while mounted in a vehicle, and on the basis of load information for the battery during re-use; a cycle degradation degree estimation unit for estimating the degree of degradation of the battery due to cycling during re-use, on the basis of the load information for the battery during re-use; and a capacity calculation unit for calculating the total degree of degradation for the point in time at which battery re-use is started. The battery degradation degree estimation device is further provided witha total degradation degree detection unit for estimating the total degree of degradation of the battery after the start of re-use, on the basis of the degree of degradation due to storage during re-use, the degree of degradation from cycling during re-use, and the total degree of degradation for the point in time at which battery re-use is started.

Description

technical field [0001] The invention relates to a battery deterioration degree estimation device and estimation method. Background technique [0002] Batteries (secondary batteries) deteriorate at a rate corresponding to the usage environment. With deterioration, the charge amount at full charge decreases and the discharge characteristics deteriorate. If the battery mounted on the vehicle deteriorates, the driving performance will decrease. Therefore, it is desirable to estimate in advance the period during which the battery can exhibit predetermined performance. In the technique of JP2007-195312A, the remaining lifetime is predicted by estimating the degree of deterioration of the battery corresponding to the square root of the total travel distance. Contents of the invention [0003] However, in the method of JP2007-195312A which estimates the degree of battery deterioration based on the square root of the total travel distance, there is a problem that the estimation ...

Claims

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Application Information

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IPC IPC(8): H01M10/48G01R31/36H01M10/42
CPCH01M10/42H01M10/48G01R31/392G01R31/367Y02E60/10H01M10/486H01M10/425H01M2010/4278H01M2220/20
Inventor 松山千鹤保坂贤司
Owner NISSAN MOTOR CO LTD