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A method for evaluating battery online control performance

A technology for controlling performance and batteries, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of increasing the commercial operation cost of electric vehicles, the gap between actual performance and design requirements, and reducing the efficiency of battery use, so as to reduce the commercial operation cost. , to avoid safety problems and improve the efficiency of use

Inactive Publication Date: 2019-07-09
北京亿利智慧能源科技有限公司
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Problems solved by technology

However, as time goes by, due to the influence of various factors, such as sensor / actuator failures, changes in working conditions, etc., the performance of the controller will gradually degrade, resulting in a large gap between the actual performance and the design requirements.
This will reduce the efficiency of battery use, increase the commercial operating costs of electric vehicles, and even cause safety issues, etc., so it is necessary to evaluate the performance of the control system

Method used

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  • A method for evaluating battery online control performance
  • A method for evaluating battery online control performance
  • A method for evaluating battery online control performance

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0017] like figure 1 As shown, a battery online control performance evaluation method specifically includes the following steps:

[0018] Step (1): Collect the battery terminal voltage value data u in the current period of time t and battery terminal current value data i t ;

[0019] Step (2): Establish an autoregressive moving average model with battery terminal current as input and battery terminal voltage as output, estimate white noise sequence,

[0020] Step (3): Estimate the minimum variance performance benchmark, Var(e t );

[0021] Step (4): Estimate the current control performance, η=Var(e t ) / Var(u t ). Among them, 0≤η≤1, the closer the value of η is to 1, the better the current control performan...

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Abstract

The invention provides an online battery control performance evaluation method, which belongs to the technical field of lithium ion battery management. The method comprises the following steps: (1) voltage value data and current value data at the battery end within the current period of time are acquired; (2) an autoregressive moving average model with current at the battery end as input and voltage at the battery end as output is built, and a white noise sequence is estimated; (3) the minimum variance performance benchmark is estimated; and (4) the current control performance is estimated. The method provided by the invention can evaluating the operation performance of the battery control performance in an online mode, and realization is easy.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery management, in particular to a battery online control performance evaluation method. Background technique [0002] In order to solve the problems of energy security and environmental pollution, in recent years, electric vehicles have achieved rapid development under the promotion of governments and automobile manufacturers. As the main energy carrier and power source of electric vehicles, batteries and their management systems are one of the core technologies of electric vehicles. The speed and starting speed of pure electric vehicles depend on the power and performance of the drive motor. The mileage depends on the capacity of the vehicle's power battery. The weight of the vehicle's power battery depends on which power battery is selected, such as lead-acid, zinc Carbon, lithium batteries, etc., their volume, specific gravity, specific power, specific energy, and cycle life are all d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/367
Inventor 张志王占国张彩萍孙丙香
Owner 北京亿利智慧能源科技有限公司
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