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Battery management system equalization capability matching method and device and computer equipment

A technology of battery management system and balancing capability, applied in battery circuit devices, battery/fuel cell control devices, circuit devices, etc.

Inactive Publication Date: 2020-03-24
SOUNDON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, whether the balancing capability of the BMS can meet the needs of the power battery needs to be further evaluated. At present, there is a lack of simple and effective methods for judging whether the balancing capabilities of the power battery and the BMS match.

Method used

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  • Battery management system equalization capability matching method and device and computer equipment
  • Battery management system equalization capability matching method and device and computer equipment
  • Battery management system equalization capability matching method and device and computer equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] figure 1 A schematic flowchart of the balancing capability matching method of the battery management system in this embodiment is shown.

[0042] In step S100, when the equalization function of the battery management system on the power battery is started, the equalization start time is recorded.

[0043] Here, the highest cell voltage of the power battery before the equalization function starts has a target value, and the target value is greater than a certain value of the equalization opening voltage so that the highest cell voltage in the power battery is still greater than or equal to The balanced opening voltage; before the equalization function is started, the maximum pressure difference in the power battery reaches the test target pressure difference, and the test target pressure difference is greater than the equalized opening pressure difference. The power battery that meets the above test conditions can be directly used for the evaluation of the equalization ca...

Embodiment 2

[0055] figure 2 A schematic flowchart of the balancing capability matching method of the battery management system in this embodiment is shown.

[0056] In Example 1, the power battery that has met the test conditions is directly used to evaluate the balance capability of the BMS. When the power battery does not meet the corresponding test conditions, some adjustment operations can be performed on the power battery in advance, and then the balance capability of the BMS can be evaluated. . The difference between this embodiment and Embodiment 1 is that the above-mentioned adjustment operation is performed first.

[0057] In step S70, pre-charging is performed before the equalization function is started so that the highest cell voltage of the power battery reaches the target value; in step S80, a battery module in the power battery is discharged so that the pressure difference between the battery module with the highest cell voltage in the power battery and the discharged bat...

Embodiment 3

[0067] image 3 A schematic structural diagram of the balancing capability matching device of the battery management system in this embodiment is shown.

[0068] image 3 The battery management system equalization capability matching device 100 shown includes: a start-up time recording module 110, which is used to record the equalization start time when the balance function of the battery management system on the power battery is started; a monitoring module 120, which is used to monitor during the equalization process Equalize the current and the maximum voltage difference between the battery modules in the power battery, the battery module includes a single battery or multiple batteries connected in parallel; the end time recording module 130 is used to start the balance when the maximum pressure difference is less than or equal to Turn off the equalization function and record the equalization end time when there is a differential pressure; the judging module 140 is used to...

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Abstract

The embodiment of the invention discloses a battery management system equalization capability matching method and device and computer equipment. The battery management system equalization capability matching method comprises the following steps: recording the equalization starting time when an equalization function of the battery management system on a power battery is started; monitoring the equalization current and the maximum voltage difference between battery modules in the power battery in the equalization process, wherein each battery module comprises a single battery or a plurality of batteries connected in parallel; when the maximum pressure difference is smaller than or equal to the equalization starting pressure difference, disabling the equalization function, and recording the equalization ending time; and determining the equalization time according to the equalization ending time and the equalization starting time, and judging whether the equalization capability of the battery management system meets the equalization requirement of the power battery or not according to the equalization time and the equalization current. The battery management system equalization capability matching method is a simple and effective judgment method for judging whether the equalization capability of the power battery is matched with the equalization capability of the BMS or not.

Description

technical field [0001] The present invention relates to the field of power battery systems, in particular, the present invention relates to a battery management system balancing capability matching method, device and computer equipment. Background technique [0002] A power battery includes multiple battery modules, and the consistency of the battery modules has a profound impact on the performance of the power battery. Improving the consistency of the battery module is conducive to prolonging the cycle life of the power battery, effectively improving the charging efficiency of new energy vehicles, and saving users' charging costs. The intuitive performance of the consistency of the battery module is the pressure difference, and the smaller the pressure difference, the better the consistency of the battery module. However, due to the limitations of the manufacturing process, there are inevitably some differences in the consistency of the battery modules in the power battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/22B60L58/10H02J7/00
CPCB60L58/22B60L58/10H02J7/0014Y02T10/70
Inventor 唐雁雁何剑严丽肖剑张勇刘强
Owner SOUNDON NEW ENERGY TECH CO LTD