CN210404808U

CN210404808U - Active clamp flyback battery cell charging and discharging system

Info

Publication number: CN210404808U
Application number: CN201921099186.5U
Authority: CN
Inventors: 黄勇; 陈明新
Original assignee: Shenzhen Xinweier Electronics Co Ltd
Current assignee: Shenzhen Xinweier Electronics Co Ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-04-24
Anticipated expiration: 2029-07-15

Abstract

The utility model discloses an electric core charge-discharge system that active clamper flyback was turned over, electric core charge-discharge system that active clamper flyback was turned over includes: the system comprises an MCU unit, a power control circuit and an ACDC bidirectional module; the power control circuit comprises a clamping capacitor, an energy storage transformer, a plurality of switching triodes, a plurality of resistors and a clamping capacitor, wherein the switching triodes are correspondingly provided with junction capacitors; the control circuit is connected with the ACDC bidirectional module and the battery in series in two stages, the MCU unit is connected in the power control circuit in parallel, and the MCU unit controls the switching triode through a control command. The utility model discloses reach and effectively improved battery charge-discharge system's energy conversion efficiency to the cost is reduced.

Description

Active clamp flyback battery cell charging and discharging system

Technical Field

The utility model relates to a battery charge-discharge technical field especially relates to an active clamper flyback's electric core charge-discharge system.

Background

The design scheme of the currently common battery charging and discharging system is that the system consists of an AC-400 Vdc bidirectional module, a 400Vdc-DC bidirectional module, a BUCK-BOOST lifting pressing module and a high-voltage battery charging and discharging module, but the conversion efficiency is low and the cost is high.

Therefore, it is required to further improve the conversion efficiency and reduce the cost of the charge and discharge system.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides an active clamper flyback's electric core charge-discharge system, aims at solving battery charge-discharge system conversion efficiency and is less than with high costs problem.

In order to achieve the above object, the utility model provides an active clamper flyback's electric core charge-discharge system, active clamper flyback's electric core charge-discharge system includes: the system comprises an MCU unit, a power control circuit and an ACDC bidirectional module; the power control circuit comprises a clamping capacitor, an energy storage transformer, a plurality of switching triodes, a plurality of resistors and a clamping capacitor, wherein the switching triodes are correspondingly provided with junction capacitors; the control circuit is connected with the ACDC bidirectional module and the battery in series in two stages, the MCU unit is connected in the power control circuit in parallel, and the MCU unit controls the switching triode through a control command.

Optionally, in the power control circuit, the clamping capacitor is connected in series in a primary circuit of the energy storage transformer; and the secondary side of the energy storage transformer is provided with a current sampling module and a voltage sampling module, and the current sampling module and the voltage sampling module are connected with the MCU.

The utility model discloses a change converter topology into active clamper and turn over the fly back, when having improved battery charging system's energy conversion efficiency, still make accessory quantity in the system reduce, the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of an active clamp flyback battery cell charging and discharging system of the present invention;

fig. 2 is a schematic structural diagram of a battery charging and discharging system.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The technical solutions in the embodiments of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are combined and contradicted or can not be realized, it should be considered that the combination of the technical solutions does not exist, and the present invention is not within the protection scope of the present invention.

The utility model provides an electric core charge-discharge system that active clamper flyback is turned over, refer to fig. 1, electric core charge-discharge system that active clamper flyback is turned over includes: MCU unit, power control circuit and ACDC bidirectional module. The power control unit mainly comprises a transformer T1, and the transformer is respectively connected with the ACDC bidirectional module and the two stages of the battery in the same circuit. The battery is connected with a secondary side circuit of the transformer, a current sampling module (connected in series in the circuit) and a voltage sampling module (connected in parallel in the circuit) are arranged in the circuit, and a switching triode Q3 and a capacitor C4 are also arranged in the circuit. The primary circuit of the transformer is connected with the ACDC bidirectional module, two triode switches Q1 and Q2 and corresponding resistors R11 and R15 are arranged in the circuit, Q1 and Q2 are respectively provided with corresponding junction capacitors, the leakage inductance Lk of the transformer is connected with the transformer in series, and meanwhile, a capacitor C11 is connected in the circuit.

When the circuit charges the battery in the forward direction, C11 is a clamping capacitor, Q2 is conducted, and the transformer T1 stores energy. When the Q2 is turned off, the T1 can release energy to enter the secondary stage, and the Q3 is turned on, so that the charging system charges the battery. When C11 is clamped to a certain voltage, Q1 is turned on, and C11 resonates with the transformer leakage inductance Lk, so that the transformer current is reduced, and the transformer is demagnetized. Demagnetization of the transformer causes the current flowing through Q3 to drop to 0, causing Q3 to open, thereby achieving Zero Current Switching (ZCS) opening. And after the Q1 is turned off, the resonant current charges the Q1 junction capacitor and discharges the Q2 junction capacitor, and when the Q2 junction capacitor is completely discharged, the Q2 realizes the conduction of a Zero Voltage Switch (ZVS).

Under the condition that the battery is discharged, the circuit becomes a flyback circuit, when the Q3 is conducted, the T1 stores energy, after the energy storage is finished, the Q3 is disconnected, the transformer releases energy, the released energy is fed back to the power grid through the ACDC bidirectional module, and meanwhile, the Q2 is opened to conduct synchronous rectification.

The utility model discloses compare present battery charging system commonly used (the structure picture refers to fig. 2), turn into active clamper through with the converter topology and turn over the fly to can use an inductance less at the output

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. The utility model provides an electric core charge-discharge system of active clamper flyback which characterized in that, electric core charge-discharge system of active clamper flyback includes: the system comprises an MCU unit, a power control circuit and an ACDC bidirectional module; the power control circuit comprises a clamping capacitor, an energy storage transformer, a plurality of switching triodes, a plurality of resistors and a clamping capacitor, wherein the switching triodes are correspondingly provided with junction capacitors; the control circuit is connected with the ACDC bidirectional module and the battery in series in two stages, the MCU unit is connected in the power control circuit in parallel, and the MCU unit controls the switching triode through a control command.

2. The active-clamp flyback battery cell charge-discharge system according to claim 1, wherein in the power control circuit, the clamp capacitor is connected in series in a primary side circuit of the energy storage transformer; and the secondary side of the energy storage transformer is provided with a current sampling module and a voltage sampling module, and the current sampling module and the voltage sampling module are connected with the MCU.