Banked battery and voltage balancing method thereof

Abstract

The embodiment of the invention discloses a banked battery and a voltage balancing method thereof. The banked battery comprises a power bus and at least two batteries, wherein each battery comprises abattery cell, an even voltage charging module, a charging switch, a discharging switch and a battery management device, wherein the battery management device is connected with the battery cell, and is used for acquiring the voltage state of each battery; if the voltage state of each battery is a discharging requiring state, the battery management device of the battery controls the discharging switch to discharge through the power bus; if the voltage state of each battery is a charging requiring state, the battery management device of the battery controls the charging switch to charge throughthe power bus; and when the charging current is larger than a first current threshold value, the even voltage charging module is controlled to charge through the power bus. According to the technicalscheme, the problem of influence on the charging / discharging capacity of the batteries due to severe heating of the batteries caused by over large charging / discharging current under voltage imbalanceamong the batteries in an existing banked battery is imbalanced is solved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electric energy storage and power supply, and in particular to a parallel battery pack and a voltage equalization method thereof. Background technique [0002] Marine electric propulsion refers to the electric motor equipment that is powered by a secondary battery and the extended end of the motor shaft directly drives the propeller. It is often used in leisure fishing, tourism and water sports and other occasions. And compared with gasoline outboard motors or diesel outboard motors, marine electric propellers are less noisy and more environmentally friendly, making users use marine electric propellers more and more frequently. [0003] Users of marine electric propellers use multiple batteries in parallel to form a battery pack, and use the battery pack as a power supply battery for the marine electric propulsion unit to increase the battery capacity of the power supply battery and ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a parallel battery pack and its voltage equalization method to solve the problem that the charging and discharging current is too large due to voltage imbalance between the batteries in the existing parallel battery pack, which leads to serious heating of the battery and affects the discharge capacity of the battery.

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