A Consistency Evaluation Method for Single String Batteries in a Battery Module
A battery module and consistent technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve problems such as system loss, voltage inconsistency, and product performance inconsistency, so as to avoid major losses and prevent large consistency deviations.
Active Publication Date: 2021-11-09
SOLAR POWER NETWORK TECHNOLOGY (ZHEJIANG) CO LTD
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Problems solved by technology
[0002] In the production of power cells, due to the instability of the accuracy and purity of materials determined by the basic industry level, the performance of the final product is inconsistent; Parallel connection, connected together to form a module, the process in the process is inconsistent, such as the inconsistency of the welding process, it is very easy to cause the difference in welding resistance, which will inevitably lead to the inconsistency of the voltage between the single string batteries in the module
Due to the inconsistency of the voltage between the single-string batteries, the system may cause unexpected shutdown due to excessive pressure difference and cause major losses
Method used
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[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.
[0031] The present invention proposes a method for evaluating the consistency of a single string of batteries in a battery module, such as figure 1 shown, including:
[0032] S1: Obtain the corresponding relationship between voltage and capacity of a normal battery at different temperatures to be tested;
[0033] S2: Obtain the voltage of each string of batteries in the battery module to be tested at different temperatures and capacities, and compare the voltage of each string of batteries in the battery module to be tested with the voltage of the normal battery at the same temperature and the same capacity By comparison, batteries with inconsistent correspondences are obtained, and it is judged as batteries with problems;
[0034] S3: Obtain the voltage drop of each string of b...
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The present invention relates to the field of battery detection, in particular to a method for evaluating the consistency of a single string of batteries in a battery module, including: S1: obtaining the corresponding relationship between voltage and capacity of a normal battery at different temperatures to be tested; S2: obtaining the battery to be tested The voltage of each string of batteries in the module at different temperatures to be tested and different capacities, compare the voltage of each string of batteries in the battery module to be tested with the voltage of normal batteries at the same temperature and the same capacity, and the corresponding relationship is inconsistent S3: Obtain the voltage drop of each string of batteries in the battery module after being discharged for the same time at different discharge rates, and obtain batteries with inconsistent corresponding relationships, which are judged as batteries with problems. The invention prevents the consistency deviation of the battery in the battery module group from being large, and avoids the heavy loss caused by the inability to work due to the consistency problem of the battery.
Description
technical field [0001] The invention relates to the field of battery detection, in particular to a method for evaluating the consistency of a single string of batteries in a battery module. Background technique [0002] In the production of power cells, due to the instability of the accuracy and purity of materials determined by the basic industry level, the performance of the final product is inconsistent; Parallel connection, connected together to form a module, inconsistency in the process of processing, such as inconsistency in the welding process, can easily cause differences in welding resistance, which will inevitably lead to inconsistencies in voltage between single strings of batteries in the module. Due to the inconsistency of voltage between single strings of batteries, the system may cause unexpected shutdown due to excessive pressure difference and cause major losses. Contents of the invention [0003] In order to solve the above problems, the present inventi...
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IPC IPC(8): G01R31/385G01R31/396
CPCG01R31/385G01R31/396
Inventor 宋苏袁瑞臻彭密
Owner SOLAR POWER NETWORK TECHNOLOGY (ZHEJIANG) CO LTD