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Method and device for determining capacity of power battery, medium and electronic equipment

A power battery and capacity technology, applied in the field of vehicles, can solve the problems of inability to apply low-frequency data collection and high data accuracy requirements.

Active Publication Date: 2021-12-03
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires high data accuracy, and is only suitable for high-frequency acquisition scenarios, and cannot be applied to low-frequency acquisition data

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  • Method and device for determining capacity of power battery, medium and electronic equipment
  • Method and device for determining capacity of power battery, medium and electronic equipment
  • Method and device for determining capacity of power battery, medium and electronic equipment

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Embodiment Construction

[0075] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0076] Before introducing the solutions of the present disclosure, the application background of the present disclosure will be described first. As mentioned in the background art, the prediction of the power battery capacity is of great significance.

[0077] There are many methods for battery capacity estimation, such as open circuit voltage method, ampere-hour integration method, and neural network method. Since it is difficult to obtain the static voltage in a real vehicle, and the SOC estimation is easily affected by temperature, the open circuit voltage method is not suitable for the capacity estimation of the vehicle power battery. The ampere-hour in...

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Abstract

The invention relates to a method and device for determining the capacity of a power battery, a medium and electronic equipment. The method comprises the following steps of acquiring a charging current corresponding to each charging moment of the power battery in a historical charging process, according to the charging current corresponding to each charging moment, determining a current stable stage in the historical charging process, and in the charging time period corresponding to each current stable stage, enabling the change value of the charging current not to exceed a preset current change threshold value, determining a target current stable stage from the current stable stage, and determining the capacity of the power battery according to the charging current and the charging voltage corresponding to each charging moment in the target current stable stage. Therefore, the data can be screened, the stage of stable data change can be screened out, and the capacity of the power battery can be determined by using the data in the stage, so that the capacity of the power battery can be accurately determined even in a low-frequency acquisition scene.

Description

technical field [0001] The present disclosure relates to the field of vehicles, in particular, to a method, device, medium and electronic equipment for determining the capacity of a power battery. Background technique [0002] With the gradual popularization of electric vehicles, the performance and status of batteries are becoming more and more important as a part of the three electric systems. Battery life is an important part of the process of research and development of batteries and power battery packs, and battery life is also one of the indicators for evaluating the pros and cons of power battery packs. Therefore, the prediction of power battery capacity is the focus of electric vehicle research, and it has high significance for battery cell research and development. In related technologies, the battery state parameters are generally obtained through online data, and the actual cumulative charge and discharge capacity is obtained by using methods such as ampere-hour ...

Claims

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Application Information

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IPC IPC(8): B60L58/12B60L3/12G06F17/11
CPCB60L58/12B60L3/12G06F17/11Y02T10/70
Inventor 赵龙灿李梦钊王宇胡孝臣梁赛
Owner SVOLT ENERGY TECHNOLOGY CO LTD