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Battery monitoring method and system

A battery monitoring and battery technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of poor accuracy and low safety of monitoring data, and achieve the effect of improving accuracy, improving safety, and not being prone to electromagnetic interference

Active Publication Date: 2021-09-24
AULTON NEW ENERGY AUTOMOTIVE TECHNOLOGY GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a battery monitoring method and system in order to overcome the defects of poor accuracy and low safety of monitoring data of lithium power batteries in the prior art

Method used

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  • Battery monitoring method and system
  • Battery monitoring method and system

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Embodiment 1

[0044] This embodiment provides a battery monitoring method. In this embodiment, the battery is a lithium power battery used in new energy vehicles, but the battery type is not specifically limited, and different types of batteries can be monitored according to actual conditions. .

[0045] Such as figure 1 As shown, the battery monitoring method includes the following steps:

[0046] Step 101, acquiring the energy change curve of the battery.

[0047] In this step, the energy change curve of the battery is acquired and stored in advance, the energy change curve is used to characterize the energy change of the battery when charging or discharging in an ideal state, and each energy value of the energy change curve is related to There is a one-to-one correspondence between a temperature difference of the battery.

[0048] Step 102, installing a fiber grating temperature sensor on the battery.

[0049] In this embodiment, the battery includes several battery cells, and the nu...

Embodiment 2

[0068] This embodiment provides a battery monitoring system. In this embodiment, the battery is a lithium power battery used in new energy vehicles, but the battery type is not specifically limited, and different types of batteries can be monitored according to actual conditions. .

[0069] Such as figure 2 As shown, the battery monitoring system 1 includes a battery 2, a number of fiber grating temperature sensors 3, a voltage and current detection module 4 and a processing module 5, and the battery 2 includes a number of battery cells 21. In this embodiment, the battery cells are not specifically limited. and the number of fiber grating temperature sensors can be determined according to the actual situation.

[0070] A plurality of fiber grating temperature sensors are installed on the electrode positions on the surface of each cell, and the accuracy of the test data can be improved by setting the fiber grating temperature sensors on the electrode positions on the surface ...

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Abstract

The invention discloses a battery monitoring method and system. The battery monitoring method includes the following steps: obtaining the energy change curve of the battery, the energy change curve represents the energy change when the battery is charged or discharged in an ideal state, and each energy value of the energy change curve One-to-one correspondence with a temperature difference of the battery, and an optical fiber grating temperature sensor is installed on the battery; the temperature value of the battery during charging or discharging is collected through the optical fiber grating temperature sensor, and the second temperature value of the two temperature values ​​​​of the battery within a preset time period is calculated A temperature difference; obtain the first electric energy charged or discharged by the battery within a preset time period; obtain the first energy value corresponding to the first temperature difference from the energy change curve, and judge the first energy value and the first electric energy Whether the absolute value of the difference between them is greater than or equal to the first preset threshold, if so, the battery is powered off and an alarm message is output. The invention improves the accuracy of battery monitoring data and improves the safety of the battery during operation.

Description

technical field [0001] The invention relates to the field of battery monitoring, in particular to a monitoring method and system for a lithium power battery. Background technique [0002] The power of new energy vehicles comes from the battery PACK (processing and assembly of battery packs) of a large number of lithium-ion batteries, and the BMS (Battery Management System, battery management system) is the core component of the lithium battery PACK, consisting of many electronic components. However, based on the characteristics of the electronic components themselves, they are susceptible to electromagnetic interference, resulting in inaccurate measurement data; at the same time, when the electronic components are working, they have a high calorific value, which is easy to cause a short circuit and lead to the safety of the lithium battery pack. reduced sex. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/382G01R31/389G01K11/3206
Inventor 李攀白玉凤李巍翁志福兰志波张建平
Owner AULTON NEW ENERGY AUTOMOTIVE TECHNOLOGY GROUP
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