Battery management circuit

Abstract

The present invention provides a battery management circuit applied to a battery pack composed of N battery cell elements, wherein N is a positive integer larger than or equal to 1. The battery management circuit comprises a plurality of pressure sensors and a main control module. The pressure sensors are respectively arranged inside each battery cell and / or between two adjacent battery cells and are used for detecting a first pressure inside each battery cell and / or a second pressure between two adjacent battery cells. The main control module is respectively connected with each pressure sensor and is used for comparing a first predetermined pressure threshold value with the pressure value of each first pressure and / or comparing a second predetermined pressure threshold value with the pressure value of each second pressure, and then independently controlling the on / off state of a circuit corresponding to each battery cell element based on comparison results. According to the technical scheme of the invention, when the pressure between two adjacent battery cells is increased to reach a safety pressure value, the circuit of a battery cell element corresponding to an abnormal battery cell is disconnected. Therefore, the safety of the battery pack is improved, and the service life of the battery pack is prolonged.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery management circuit. Background technique [0002] With the demand for power from various electrical devices, the rapid development of the battery industry has been promoted. In order to meet the demands of various electric devices, the capacity of the battery is getting larger and larger, and a battery management circuit is usually configured to ensure the safety of various electric devices when using the battery. [0003] The current battery management circuit can usually monitor the current, voltage, remaining power, temperature, overcharge or overdischarge of the battery, etc., and control and protect the battery through a Microcontroller Unit (MCU). [0004] However, when the battery is charged or squeezed in the battery pack, a certain pressure will be generated inside or between the cells, causing the cell to expand. When the battery continues to be used, the p...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a battery management circuit to solve the problem that the battery management circuit in the prior art does not monitor the pressure inside or between the cells, resulting in the inability to monitor the pressure inside or between the cells in time. Changes, the MCU cannot control the power supply in time to stop charging the battery or cannot prompt the user to take effective measures, which reduces the safety of the battery and shortens the service life of the battery

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