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A method and system for calculating battery equalization time based on translation curve

A technology of battery balancing and translation curve, applied in the direction of secondary battery, secondary battery repair/maintenance, secondary battery charging/discharging, etc. problem, to achieve the effect of good consistency, improved calculation accuracy, and low resource consumption

Active Publication Date: 2022-02-18
安徽优旦科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at problems such as poor balancing ability of lithium iron phosphate batteries, complicated calculation or low calculation accuracy of existing battery balancing methods, which affect battery service life and safety, the present invention provides a method and system for calculating battery balancing time based on translational curves, according to The charging curve of the battery is calculated to obtain the equalization time, which realizes the full balance of the vehicle during the driving and charging process, prolongs the equalization time, better the equalization effect, and ensures the accuracy of the equalization calculation

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  • A method and system for calculating battery equalization time based on translation curve
  • A method and system for calculating battery equalization time based on translation curve
  • A method and system for calculating battery equalization time based on translation curve

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Embodiment 1

[0037] This embodiment discloses a method for calculating battery equalization time based on the translation curve. The battery management system translates the voltage change curve with a higher voltage when fully charged according to the charging curve of each single battery in the battery pack until it is the same as when fully charged. The lowest voltage change curve has the greatest similarity, and the difference in the capacity of each single battery relative to the lowest voltage can be obtained, and then divided by the equalization current, the equalization time can be obtained.

[0038] Such as figure 1 As shown, this embodiment includes the following steps:

[0039] S1: The battery management system obtains the charging curve of each single battery in the battery pack, and judges whether it is currently fully charged. If it is fully charged, enter step S2, otherwise exit the battery equalization time calculation;

[0040] The battery management system obtains the ch...

Embodiment 2

[0059] This embodiment discloses a battery equalization control system, which includes an acquisition module, a translation module and an equalization module. For charging curves other than the benchmark charging curve, calculate the similarity between each charging curve and the benchmark charging curve; based on the similarity calculated by the translation module, the equalization module selects the point with the maximum similarity between the charging curve and the benchmark charging curve to calculate the equalization time and control the battery equalization operation.

[0060] The battery balancing control system is set in the battery management system BMS. The battery management system protects the safety of the power battery, receives the battery transmission data in real time during the battery use, and controls the battery. The balancing operation of the battery can be directly controlled by the battery management system. Similarly, the battery balance control syste...

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Abstract

The invention discloses a method and system for calculating battery equalization time based on a translation curve, belonging to the technical field of automobile batteries. Aiming at the problem of short equalization time or inaccurate calculation of the existing power battery, which affects the service life and safety of the battery, the present invention provides a method for calculating the equalization time of the battery based on the translation curve. Based on the charging curve of the full charge, the minimum voltage of the full charge is selected The charging curve of a single battery is the benchmark charging curve, and the charging curves of other single batteries are shifted one by one until the curve similarity with the benchmark charging curve is the largest, and the time difference before and after the charging curve is shifted is obtained, and then compared with the charging curve during this period The current is integrated to obtain the capacity difference between the fully charged state of each single battery and the lowest single battery, and finally divided by the equalization current to obtain the equalization time of each single battery. The invention has high calculation accuracy of the equalization time, improves the battery equalization efficiency, and ensures the stability and safety of the battery.

Description

technical field [0001] The present invention relates to the technical field of automobile batteries, more specifically, to a method and system for calculating battery equalization time based on a translation curve. Background technique [0002] Under the pressure of energy and environmental protection, new energy vehicles have become the development direction of future automobiles. New energy vehicles refer to vehicles that use unconventional vehicle fuels as their power source, also known as "alternative fuel vehicles" and "low pollution vehicles". Due to the uniqueness of automotive products, the reliability of new energy vehicles is closely related to the stability of power batteries. [0003] The power battery is the battery that provides the power source for the car. The power battery converts chemical energy into electrical energy and is an environmentally friendly green energy source. The power battery pack is composed of several single cells. Due to reasons such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/22B60L58/12B60L3/00H01M10/42H01M10/44
CPCB60L58/22B60L58/12B60L3/0084H01M10/4207H01M10/425H01M10/441H01M2010/4271Y02E60/10Y02T10/70
Inventor 来翔苏鹤年徐昌文吕忠健
Owner 安徽优旦科技有限公司
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