Distributed battery pack state of charge estimation algorithm

A distributed algorithm, state of charge technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problem of inability to obtain the state of charge of the battery, unfavorable battery pack energy balance, charge and discharge management of battery cells, and insufficient consideration Battery pack energy management system design and other issues

Active Publication Date: 2019-04-16
刘平
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Problems solved by technology

However, since the state of charge of each single battery cannot be obtained, it is not conducive to the energy balance in the battery pack and the charge and discharge management of the battery cells
[0009] 2. The method of simultaneously estimating the state of charge of the battery pack and the single cell still needs to be impro...

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  • Distributed battery pack state of charge estimation algorithm
  • Distributed battery pack state of charge estimation algorithm
  • Distributed battery pack state of charge estimation algorithm

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Embodiment Construction

[0091] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0092] Such as Figure 1-4 As shown, in one embodiment of the present invention, a method for estimating the state of charge of a distributed battery pack is proposed, which can accurately obtain the state of charge of each battery cell in the battery pack, and facilitate subsequent battery energy management. The present invention belongs to a model-based state of charge estimation method. Firstly, a high-efficiency battery pack overall system structure design is provided. On this basis, a battery pack state of charge estimation method is specifically proposed. Through online upda...

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Abstract

The invention belongs to the field of lithium batteries, and discloses a distributed battery pack state of charge estimation algorithm. Through designing a distributed state of charge estimation method, the calculation amount for estimating the state of charge of a single cell in the battery pack is reasonably distributed. Through the cooperation of a master controller and several slave controllers, the states of charge of all battery cells in the battery pack can be quickly acquired, and substantially, the battery pack state of charge estimation calculation efficiency and the reliability areimproved.

Description

technical field [0001] The invention relates to an estimation algorithm of the state of charge of a distributed battery pack. Background technique [0002] Environmental problems and energy crisis make transportation electrification an important development direction of future transportation. As more and more renewable energy sources such as wind power and photovoltaics are connected to the grid, electric energy becomes more low-carbon and environmentally friendly. Electric vehicles use the electric energy stored in the battery pack to drive the electric motor to provide kinetic energy for the vehicle to move forward. Therefore, safe and efficient storage and output of electrical energy is critical for electric vehicles. As the only energy storage component of electric vehicles, the performance of battery packs will directly affect the driving experience of electric vehicle users. Compared with other battery technologies, the excellent performance of lithium batteries mak...

Claims

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Application Information

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IPC IPC(8): G01R31/388G01R31/396
Inventor 刘平孟锦豪王建武
Owner 刘平
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