Parallel single cell performance monitoring system and monitoring method

A single battery and monitoring system technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as difficult initial performance parameters, consistency, lack of single battery performance monitoring system, etc.

Inactive Publication Date: 2015-11-18
JIANGSU UNIV
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AI Technical Summary

Problems solved by technology

In practical applications, in order to ensure the consistency of the performance of each single cell in the battery pack, the single cells are screened when the battery pack is integrated, and the single cells with similar capacity and internal resistance are selected, but this method is still difficult. Ensure that the initial performance parameters of each single battery in the battery pack are completely consistent, and the working conditions of each single battery are not completely consistent
Even if each single battery in the battery pack has the same charge and discharge current, if there is a difference in the initial...

Method used

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  • Parallel single cell performance monitoring system and monitoring method
  • Parallel single cell performance monitoring system and monitoring method
  • Parallel single cell performance monitoring system and monitoring method

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Embodiment Construction

[0036] The performance monitoring system for parallel single cells proposed by the present invention includes a main control module, a voltage acquisition module, a current acquisition module and corresponding current sensors, temperature sensors and the like.

[0037] The main control module is equipped with a CAN interface and a U disk storage interface for receiving, storing and uploading the performance parameters of the single battery from the current acquisition module and the voltage acquisition module. The main control module also has the function of detecting the insulation resistance of the power battery pack, and The relationship between the sum of the voltages of the single cells connected in series and the total voltage of the battery pack can be used to judge whether the circuit is faulty.

[0038] The voltage acquisition module includes a parallel monomer battery voltage acquisition circuit, a temperature acquisition circuit, and a monomer battery overcharge / disc...

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Abstract

The invention discloses a parallel single cell performance monitoring system and monitoring method. The system comprises a master control module, a voltage acquisition module, a current acquisition module and a current sensor. The maser control module is respectively connected with the voltage acquisition module and the current acquisition module through a CAN bus; the voltage signal joint of the voltage acquisition module is respectively connected with the anode and the cathode of a cell, and the temperature signal joint of the voltage acquisition module is connected with a temperature sensor; the current signal joint of the voltage acquisition module is connected with the current sensor; the master control module is used for receiving, storing and uploading single cell performance parameters transmitted by the current acquisition module and the voltage acquisition module; and the master control module detects insulation resistance of a battery pack and determines whether a fault occurs in a line by use of the relation between the voltage sum of each serially connected single cell and the total voltage of the battery pack. The system provided by the invention can realize measurement of performance parameters of any one single cell in the battery pack and is high in precision.

Description

technical field [0001] The invention relates to a battery performance monitoring system and a monitoring method, in particular to a performance monitoring system for parallel-connected monomer batteries. Background technique [0002] As the main power source of electric vehicles, the performance of batteries will directly affect the promotion of electric vehicles. To study the charge-discharge and cycle life characteristics of the battery, and to test the performance of the battery under different conditions has important theoretical significance and practical application value for the safety research of electric vehicles. [0003] As a commonly used device for monitoring battery performance parameters, the battery management system can generally realize the measurement of single-cell battery voltage, temperature, battery pack current, and battery pack voltage. The capacity requirements of the battery pack are met, and then multiple single-cell batteries are connected in se...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 王丽梅陈龙江浩斌袁朝春汪若尘汪少华盘朝奉徐兴
Owner JIANGSU UNIV
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