Device and method for managing batteries

Abstract

The invention discloses a device and method for managing batteries. The method comprises the following steps: determining whether an external power supply needs to be connected; using the external power supply to directly supply power for an electricity consumption module if the external power supply needs to be connected; determining whether the electric quantity of a first battery is lower than a first threshold if the external power supply does not need to be connected; using the first battery to supply power for the electricity consumption module if the electric quantity of the first battery is not lower than the first threshold, and determining whether the electric quantity of a second battery is lower than the first threshold if the electric quantity of the first battery is lower than the first threshold; and using the second battery to supply power for the electricity consumption module if the electric quantity of the second battery is not lower than the first threshold, and stopping to supply power for the electricity consumption module if the electric quantity of the second battery is lower than the first threshold. According to the invention, the first battery and the second battery can work in an alternative mode, and the battery can be replaced instead of being charged directly when lack of power, so the number of charge cycles can be reduced and the situation that the shortened life expectancy of a battery can cause the life expectancy of the whole power supply system to be shortened can be avoided, thus the service life of the battery powered system can be improved as a whole.

Description

technical field [0001] The present invention relates to the field of electronics, in particular to a battery management device and method. Background technique [0002] The battery-powered system is one of the important components of portable electronic products. With the development of portable electronic products, the requirements for the service life of the battery-powered system are getting higher and higher, and the bottleneck restricting the service life of the battery-powered system is the battery life. [0003] At present, lithium polymer batteries are mostly used in portable electronic products, which have the advantages of small size, strong plasticity and high safety. However, with the increase of charging times, the energy stored in lithium-ion batteries is gradually decreasing. The more and more frequent charging times, the easier it is to lead to a sharp shortening of the life of lithium ions. Therefore, how to reduce the number of charging and discharging of ...

AI Technical Summary

Problems solved by technology

The more and more frequent charging times, the easier it is to lead to a sharp shortening of the life of lithium ions. Therefore, how to reduce the number of charging and discharging of batteries through reasonable design and prolong the aging speed of batteries has become a difficult problem in the industry.

[0004] In addition to prolonging the life of the battery-powered system by reducing the number of times the battery is charged in the battery-powered system, the current single-cell power supply scheme in the battery-powered system is also an important reason for the short life of the battery-powered system

[0005] In the prior art, there is a scheme for controlling dual power supplies using a dual-battery control device, which uses an integrated circuit to realize dual-battery switching and charge-discharge management on a single chip, but this scheme does not effectively control the timing and use of dual-battery switching The priority will be explained in detail. During the use of dual batteries, the dual batteries may be discharged at the same time, resulting in the same life of the dual batteries, so that the life of the battery-powered system cannot be extended as a whole.

Images