Battery management circuit

Abstract

The embodiment of the invention relates to a battery management circuit. The battery management circuit comprises a battery pack, a fuse, a first switch, a second switch, a third switch, a pre-charging resistor, a battery management unit, a battery control system and a background monitoring system, wherein the battery pack, the fuse, the first switch and the second switch are connected in series,the third switch is connected in series with the pre-charging resistor and is connected in parallel with the second switch, an output end of the battery management unit is connected with an input endof the battery control system, and the battery management unit is used for collecting voltage data, current data and temperature data of a battery pack and sending the voltage data, the current data and the temperature data to the battery control system, the battery control system is connected with control ends of the first switch, the second switch and the third switch and used for controlling the first switch, the second switch and the third switch to be turned on and off, and the background monitoring system is connected with the battery control system and is used for monitoring the batterymanagement circuit.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a battery management circuit. Background technique [0002] With the continuous advancement of science and technology and the improvement of mechanical automation, various electrical devices have gradually increased, and the battery industry has developed rapidly. 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 the electric device when using the battery. [0003] Currently, the battery management circuit monitors the voltage of each battery or each group of batteries, depending on the implementation, when the voltage of any one battery drops below a predetermined value, it disconnects the load, and when charging, when any one battery reaches a predetermined voltage, then The shunt is activated, the battery bypasses some of ...

AI Technical Summary

Problems solved by technology

However, this assembly still cannot guarantee that the capacity of all the batteries in the battery pack is fully used up.

[0008] It can be seen from the above that in the prior art, in the battery pack system connected in series, the battery management circuit can only monitor the voltage of the batteries in the battery pack. When the battery pack is discharged, the battery management circuit monitors the first battery pack When the voltage of the battery drops to a predetermined value, it will stop discharging immediately. The capacity of the entire battery pack system is determined by the unit with the smallest capacity. The capacity is reduced, which also reduces the service life of the battery

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