Current-drive-circuit-based constant-voltage constant-current control device

Abstract

The invention relates to the technical field of detection control of a rechargeable battery, especially to a current-drive-circuit-based constant-voltage constant-current control device comprising a power supply, a constant-current unit, a constant-voltage unit, a charging unit, a discharging unit and a register unit. A constant-current circuit is arranged in the constant-current unit; a constant-voltage circuit is arranged in the constant-voltage unit; a charging circuit is arranged in the charging unit; a discharging circuit is arranged in the discharging unit; and a register circuit is arranged in the register unit. According to the invention, the constant-current unit enables the current to be within a certain value constantly; the constant-voltage circuit enables a battery voltage to be constant; the charging circuit charges a battery; the discharging circuit discharges the battery; and the register circuit controls enabling signals of the charging circuit and the discharging circuit and enables the charging circuit and the discharging circuit not to work simultaneously. Only one of the charging circuit and the discharging circuit can work during a same period because of the register circuit.

Description

technical field [0001] The invention relates to the technical field of rechargeable battery detection and control, in particular to a constant voltage and constant current control device based on a current drive circuit. Background technique [0002] With the development and progress of science and technology, electronic products are more and more widely used in home and office occasions, and many electronic products will use rechargeable batteries as power devices. [0003] There are two main types of secondary battery energy-saving detection equipment on the market today, one is charging energy-saving equipment, and the other is energy feedback grid equipment. [0004] There are two types of charging and energy-saving equipment, one is the follow-up energy-saving equipment whose switching power supply voltage follows the battery voltage, and the other is switching power supply charging and energy-saving equipment; the biggest shortcoming of the two energy-saving equipment ...

AI Technical Summary

Problems solved by technology

[0004] There are two types of charging and energy-saving equipment, one is the follow-up energy-saving equipment whose switching power supply voltage follows the battery voltage, and the other is switching power supply charging and energy-saving equipment; the biggest shortcoming of the two energy-saving equipment is that there is no power grid feedback function, and the battery discharge All the energy is wasted on the power tube, not only is the energy wasted in vain, but also a large-volume radiator has to be added to dissipate heat for the power tube, which increases the cost of equipment, and the customer workshop also has to increase supporting ventilation facilities, thereby increasing production cost

[0005] The energy feedback grid equipment on the market basically uses DSP chips or other fast MCUs with PWM modules, but most of this type of equipment is above 10A. For a small current, the equipment on the market is very difficult. Less, mainly due to the high cost of the DSP solution. In terms of performance, the software control PWM used by the DSP feeder equipment is not fast enough to respond

Images