Series formation constant-voltage charging circuit

• Main Author: MAO GUANGFU
• Format: Patent
• Language: Chinese; English
• Published: 27.08.2021
• Subjects: ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

The invention discloses a series formation constant-voltage charging circuit. The circuit is used for charging a power battery pack, and the power battery pack is provided with a plurality of single batteries. The circuit comprises: a power supply module; a plurality of charging units which are connected in series with the positive pole and the negative pole of the power supply module, wherein each charging unit is provided with a main circuit MOS and a bypass MOS connected in parallel with the main circuit MOS, each main circuit MOS is provided with two main circuit diodes, the two main circuit diodes are in forward bias connection with the series formation constant voltage charging circuit, each bypass MOS is provided with two bypass diodes, and the two bypass diodes are reversely biased and connected in the series formation constant-voltage charging circuit; and a PWA drive which is used for controlling a main circuit diode and a bypass diode to connect or disconnect the series formation constant-voltage c