Battery protection board detection apparatus

Abstract

The invention provides a battery protection board detection apparatus, which includes a battery voltage simulation module, a self-consuming current detection module, an over-current protection current detection module, an evaluation protection behavior module, a five-path external connection power supply, and a master control CPU. The over-current protection current detection module includes a control circuit of a current source, and a current detection circuit passing across a battery protection board. The five-path external connection power supply concretely includes the first path external connection power supply, the second path external connection power supply, the third path external connection power supply, the fourth path external connection power supply, and the fifth path external connection power supply. By means of the apparatus, over-charge protection voltage, over-charge recovery voltage, over-discharge protection voltage and over-discharge recovery voltage of the battery protection board for each of batteries can be automatically detected, the self-consuming current of the whole battery protection board can be detected, and the over-current protection current of the battery protection board when all the batteries are discharging can be detected.

Description

technical field [0001] The invention relates to a testing device for electrical properties, in particular to a testing device for a battery protection board. Background technique [0002] Lithium-ion batteries have been widely used in practice due to their excellent performance. With the improvement of battery manufacturing level, the safety performance of lithium batteries is gradually improving, and the price is also falling. Therefore, in some large-capacity energy storage devices, more and more lithium-ion batteries are used as power sources. [0003] Lithium batteries themselves have high requirements for charging and discharging. Once overcharged, it is easy to cause an explosion, and overdischarge will cause permanent damage to the battery. Therefore, improper use can easily cause property losses. Nowadays, overcharge and overdischarge protection for lithium-ion batteries There are a lot of application circuits, but there are not many devices for testing these circui...

AI Technical Summary

Problems solved by technology

[0003] Lithium batteries themselves have high requirements for charging and discharging. Once overcharged, it is easy to cause an explosion, and overdischarge will cause permanent damage to the battery. Therefore, improper use can easily cause property losses. Nowadays, overcharge and overdischarge protection for lithium-ion batteries There are a lot of application circuits, but there are not many devices for testing these circuits in practice. The application number is 201110048108.4, which discloses a multi-string lithium battery pack protection board tester. The circuit structure can ensure that the protection board has overcharge, over Discharge protection and balanced charging protection function, but it can not detect the overcharge protection voltage, overcharge recovery voltage, overdischarge protection voltage, overdischarge recovery voltage of the battery protection board, the self-consumption current of the entire battery protection board and the entire battery Accurate digital quantity of the overcurrent protection current when the group discharges

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