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A method for detecting and predicting the connection reliability of battery systems

A battery system and reliability technology, applied in electrical connection testing, measuring electricity, measuring electrical variables, etc., can solve the problems of long test time, low test accuracy, low recognition degree, etc., and achieve short test time and low operation difficulty. , the effect of high collection efficiency

Active Publication Date: 2021-11-26
杭州微慕科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual test operation process of this method, the tester needs to prepare equipment such as a resistance meter to test each connection part. As the number of electrical connection parts increases, the test complexity and difficulty increase, the test accuracy is not high, and the recognition degree Not high, it is easy to cause test omissions, the test process is cumbersome, the test time is long, the requirements for staff skills are high, the operability is poor, and the economy is poor

Method used

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  • A method for detecting and predicting the connection reliability of battery systems
  • A method for detecting and predicting the connection reliability of battery systems
  • A method for detecting and predicting the connection reliability of battery systems

Examples

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Embodiment 1

[0047] Embodiment 1: Electrical Connection Reliability Detection

[0048] A battery system product uses 16 cells connected in series and parallel, and there are a total of 32 key electrical connection points. According to the original impedance test method, testers are required to prepare their own resistance meter and other equipment to test each connection point. It is carried out during the product assembly process, the test process is cumbersome, the test time is long, the requirements for staff skills are high, the operability is poor, the safety is not high, it is easy to damage, the test accuracy is not high, and the recognition degree is not high.

[0049] When adopting the method test of the present invention, concrete process is as follows:

[0050] S1, product assembly and off-line;

[0051] S2, enter the product inspection area, prepare relevant test equipment, and conduct temperature rise test;

[0052] S3, save and read the peak temperature T of each of the 32 ...

example 2

[0068] Electrical Connection Mechanical Reliability Prediction

[0069] A battery system product is in the research and development stage, and there are a total of 16 key electrical connection points. According to the original impedance test method, testers need to prepare their own resistance meter and other equipment to test each connection point, and it needs to be tested during the product assembly process. , The test process is cumbersome, the test time is long, the requirements for staff skills are high, the operability is poor, the safety is not high, it is easy to damage, the test accuracy is not high, and the recognition degree is not high. Moreover, two impedance tests are performed before and after the mechanical reliability test, which increases the inaccuracy of the test.

[0070] When adopting the method test of the present invention, concrete process is as follows:

[0071] S1, the prototype is in place, and related testing equipment is ready;

[0072] S2, acq...

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Abstract

The invention provides a method for detecting and predicting the connection reliability of a battery system, which is used for several battery packs connected in series through several electrical connection points to form a battery module, and the positive and negative terminals of the battery module form a battery with external output voltage through electrical connectors. The system charges and discharges the battery system, obtains the temperature collected from each electrical connection point during the charging and discharging process, and performs data analysis on the collected temperature to obtain the reliability of the battery system connection. A method for detecting and predicting the connection reliability of the battery system of the present invention adopts the method of collecting the temperature of the electrical connection point, which replaces the traditional impedance test method, and can simultaneously collect the electrical connection point. The test is simple, the test time is short, and the operation difficulty is low. , The collection efficiency is high, the inspection of multiple key electrical connection points can be completed at one time, the collection accuracy is high, and the temperature change of the electrical connection point can be judged more accurately.

Description

technical field [0001] The invention belongs to the field of battery energy storage systems, and in particular relates to a method for detecting and predicting the connection reliability of a battery system. Background technique [0002] New batteries can be screened (so-called group pairing) to achieve battery consistency. However, after several charge and discharge cycles, this consistency no longer exists, which is manifested in the large difference in the remaining energy between single batteries. [0003] For a series-parallel battery system, the reliability of electrical connection is one of the important factors affecting the performance and service life of the battery. The fastening performance of the bolts decreases, which leads to a decrease in the reliability of the electrical connection. In the lightest cases, it affects the performance of the product, and in the worst case, it causes the battery system to catch fire and explode. [0004] At present, the common...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/66G01R31/385
CPCG01R31/385G01R31/66
Inventor 叶天云王敏
Owner 杭州微慕科技有限公司