Protection device used for multiple batteries

Abstract

The invention provides a protection device used for multiple batteries. The protection device comprises a battery protection chipset which is respectively connected to positive electrodes of a power source and a load, a charge signal conversion module, a discharge signal conversion module and a charge and discharge control module, wherein when the power source is unsatisfied with a power supply requirement, the battery protection chipset outputs a discharge signal to control multiple batteries to supply power to the load; when any battery reaches to an over-discharge protection voltage, the battery protection chipset stops outputting the discharge signal; when the electric quantities of multiple batteries are lower than a threshold value, the battery protection chipset outputs a charge signal so as to charge the multiple batteries through the power source; when any battery reaches to an over-charge protection voltage, the battery protection chipset stops outputting the charge signal; the charge signal conversion module and the discharge signal conversion module are respectively used for amplifying and driving the charge signal and the discharge signal so as to generate a charge driving signal and a discharge driving signal; and the charge and discharge control module is used for carrying out positive conduction or negative conduction to enable the multiple batteries to discharge the load or enable the power source to charge the batteries based on the charge driving signal and the discharge driving signal.

Description

technical field [0001] The invention relates to the technical field of battery protection, in particular to a protection device for multiple batteries. Background technique [0002] In the information age, whether it is computer equipment used by government departments or large enterprises, or important equipment such as network servers and data storage, in order to prevent the loss of important data in the working equipment due to sudden power failure, it is usually necessary to configure Standard time or "long delay" reserve energy to ensure the normal use of the system. Backup battery, as a kind of reserve energy, emerges as the times require with the rapid development of information technology and the widespread use of computer systems. [0003] The type of battery used as a backup battery is generally a secondary battery such as a lithium-ion battery with a high capacity density, which can be repeatedly charged and discharged, and a lithium iron phosphate battery (iron...

AI Technical Summary

Problems solved by technology

Generally, a single battery is protected by a single protection IC. When multiple batteries are used in series, the same number of protection ICs are required for protection. On the one hand, the cost is too high, on the other hand, there are too many expansion components, and the peripheral circuit connection is too complicated. Affect system integration, poor scalability

The traditional protection scheme also includes a single-chip microcomputer control scheme, which has the advantage of flexible control and the disadvantage of difficult design, long development cycle and high cost

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