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Permissible power estimation method, battery management system and storage medium

A battery pack and discharge power technology, applied in electrical devices, secondary batteries, measuring electrical power, etc., can solve problems such as the inability to effectively determine the allowable power of battery packs, and achieve the effect of protecting safety

Pending Publication Date: 2022-06-28
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of power estimation, most of the existing methods combine the voltage of the battery cell on the basis of SOC to realize power estimation. This method can only estimate the power of a

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  • Permissible power estimation method, battery management system and storage medium
  • Permissible power estimation method, battery management system and storage medium
  • Permissible power estimation method, battery management system and storage medium

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Embodiment Construction

[0023] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0024] In view of the current power estimation, the allowable power of the entire battery pack cannot be effectively determined for a battery pack including different types of cells connected in series (wherein, the allowable power of the battery pack includes allowable discharge power and allowable charging power). After research and exploration, the inventor of the present application proposes the following embodiments to solve the above problems.

[0025] First, the estimation of the allowable discharge power is explained, see figure 1 , a schematic structural diagram of a battery management system 100 using an allowable discharge power estimation method provided by an embodiment of the present application. The battery management system 100 may be installed on electric vehicles, dro...

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Abstract

The invention provides an allowable power estimation method, a battery management system and a storage medium. The method comprises the following steps: acquiring a first charge state and a first temperature value of a first type of battery cells; acquiring a second charge state and a second temperature value of the second type of battery cells; determining a first allowable discharge current based on the first state of charge and the first temperature value; determining a second allowable discharge current based on the second charge state and the second temperature value; and calculating the allowable discharge power of the battery pack based on the discharge current with the minimum numerical value in the first allowable discharge current and the second allowable discharge current, the cut-off voltage of the first type of battery cells, the number of the first type of battery cells, the cut-off voltage of the second type of battery cells and the number of the second type of battery cells. Through the mode, the maximum allowable discharge power of the battery pack can be output on the premise of protecting the safety of the battery cells when the two types of battery cells are connected in series for use, so that the maximum discharge capability of the battery cells is exerted.

Description

technical field [0001] The present application relates to the field of battery technology, and in particular, to a method for estimating allowable power, a battery management system, and a storage medium. Background technique [0002] At present, electric vehicles are one of the effective ways to save energy and reduce emissions, and companies have invested a lot of resources to develop electric vehicles. [0003] As the energy storage unit of an electric vehicle, the power battery system needs to monitor its remaining power in real time during the charging and discharging process. The ratio of the remaining power to the 100% fully charged battery capacity is the state of charge (State Of Charge, referred to as SOC). . In the actual use process, the SOC is mainly used as reference information for the determination of battery protection and power estimation. However, in the power estimation, most of the existing methods combine the voltage of the cell based on the SOC to re...

Claims

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Application Information

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IPC IPC(8): G01R31/382G01R21/00H01M10/42B60L58/10
CPCG01R31/382G01R21/00H01M10/4257H01M10/4207B60L58/10H01M2010/4271Y02T10/70
Inventor 雷有玲黄光美徐广玉
Owner CONTEMPORARY AMPEREX TECH CO