CN210957877U

CN210957877U - Novel charger BMS power supply selection circuit

Info

Publication number: CN210957877U
Application number: CN201922353638.4U
Authority: CN
Inventors: 梁立贤; 欧有桂
Original assignee: Guangdong Aipower New Energy Technology Co ltd
Current assignee: Guangdong Aipower New Energy Technology Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-07-07
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a novel charger BMS power supply selection circuit, including resistance R1 ~ R5, diode D1, NMOS pipe Q1, brilliant circle pipe SCR, zener diode ZD1, electric capacity C1 and relay RY1, the two poles of the earth of resistance R1 are connected respectively in auxiliary power source end DC1+ and resistance R5, resistance R5 is connected in the G utmost point of brilliant circle pipe SCR, electric capacity C1 'S two poles of the earth are connected respectively in resistance R1 and resistance R5' S circuit interface, resistance R2 'S the two poles of the earth are connected respectively in auxiliary power source DC1 end + and NMOS pipe Q1' S the D utmost point, NMOS pipe Q1 'S the G utmost point, the S utmost point are connected respectively in resistance R1 and resistance R5' S circuit interface, the A utmost point, the K utmost point of brilliant circle pipe SCR are connected respectively in auxiliary power source DC1 end + and diode D1. This novel charger BMS power supply selection circuit realizes independently selecting the power supply mode, has that circuit design is reasonable, perfect, reduces power consumption's advantage.

Description

Novel charger BMS power supply selection circuit

Technical Field

The utility model relates to a supply circuit technical field specifically is a novel machine BMS power supply selection circuit charges.

Background

The battery is used as an auxiliary power supply for a power supply circuit, however, when the electric quantity of the battery is used up, a charger is needed to charge the battery; however, in the conventional power supply circuit, due to the imperfect circuit design, under the condition that the battery is electrified, the power supply circuit cannot cut off the power supply provided by the charger, so that the waste of electric power is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel machine BMS power supply selection circuit charges realizes independently selecting the power supply mode, has that circuit design is reasonable, perfect, reduces power consumption's advantage, can solve the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: a novel charger BMS power supply selection circuit comprises resistors R1-R5, a diode D1, an NMOS tube Q1, a crystal turn tube SCR, a voltage stabilizing diode ZD1, a capacitor C1 and a relay RY1, wherein two poles of the resistor R1 are respectively connected with an auxiliary power supply end DC1+ and a resistor R5, the resistor R5 is connected with a G pole of the crystal turn tube SCR, two poles of the capacitor C1 are respectively connected with a circuit interface of a resistor R1 and a resistor R5, two poles of the resistor R2 are respectively connected with a D pole of an auxiliary power supply DC1 end + and an NMOS tube Q1, a G pole and an S pole of the NMOS tube Q1 are respectively connected with a circuit interface of the resistor R1 and the resistor R1, an A pole and a K pole of the crystal turn tube SCR are respectively connected with an auxiliary power supply end DC1+ and the diode D1, the diode D1 is connected with a 3-pin circuit interface of the relay RY1, a 1 pin and a 2 pin of the relay RY 72 are respectively connected with an auxiliary power supply end DC1+ and a power supply, the 3 pins of the relay RY1 are connected to a resistor R2, the 4 pins of the relay RY1 are connected to a K pole circuit interface of the crystal turn tube SCR, the resistor R2 is connected to the ground terminal, and the two poles of the resistor R4 are respectively connected to the K pole circuit interface of the crystal turn tube SCR and a BMS power supply terminal DC2 +.

Preferably, the auxiliary power terminal DC1+ and the BMS power terminal DC2+ both have a power supply voltage of 12V.

Preferably, the zener diode ZD1 is connected in parallel to two poles of the capacitor C1.

Compared with the prior art, the beneficial effects of the utility model are as follows:

according to the novel charger BMS power supply selection circuit, when 12V power supply voltage exists at the BMS power supply end DC2+, the cathode K voltage of the SCR is larger than or equal to the anode A voltage, so that the conduction condition of the SCR of the crystal turn tube is not met, the relay RY1 is not conducted, and the BMS power supply end DC2+ provides an auxiliary power supply for supplying power; when the BMS power supply terminal DC2+ does not supply 12V voltage, the auxiliary power supply terminal DC1+ supplies 12V voltage to the battery to charge the battery; therefore, the circuit realizes the independent selection of the power supply mode, and has the advantages of reasonable and complete circuit design and reduced power consumption.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

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 work belong to the protection scope of the present invention.

Referring to fig. 1, a novel charger BMS power supply selection circuit includes resistors R1 to R5, a diode D1, an NMOS Q1, a thyristor SCR, a zener diode ZD1, a capacitor C1 and a relay RY1, two poles of the resistor R1 are respectively connected to an auxiliary power supply DC1+ and a resistor R5, the resistor R5 is connected to a G pole of the thyristor SCR, two poles of the capacitor C1 are respectively connected to a circuit interface of the resistor R1 and the resistor R5, the zener diode ZD1 is connected in parallel to two poles of the capacitor C1, two poles of the resistor R2 are respectively connected to an auxiliary power supply DC1+ and a D pole of the NMOS Q1, the G pole and the S pole of the NMOS Q1 are respectively connected to a circuit interface of the resistor R1 and the resistor R1, an a pole and a K pole of the thyristor SCR are respectively connected to an auxiliary power supply DC1+ and a diode D1, the RY pole of the relay RY 3 is connected to the foot interface of the relay RY1, and the relay RY 361 is connected to the foot interface 361 of the relay 1, The 2 pins are respectively connected with an auxiliary power supply end DC1+ and a BMS power supply end DC2+, the 3 pin of the relay RY1 is connected with a resistor R2, the 4 pin of the relay RY1 is connected with a K pole circuit interface of the crystal turn tube SCR, the resistor R2 is connected with a grounding end, and the two poles of the resistor R4 are respectively connected with the K pole circuit interface of the crystal turn tube SCR and the BMS power supply end DC2 +.

Because the power supply voltages of the auxiliary power supply end DC1+ and the BMS power supply end DC2+ are both 12V, when the BMS power supply end DC2+ has 12V power supply voltage, the voltage of the cathode K of the crystal turn tube SCR is greater than or equal to the voltage of the anode A, so that the conduction condition of the crystal turn tube SCR is not met, the relay RY1 is not conducted, and the BMS power supply end DC2+ provides auxiliary power supply for supplying power; when the BMS power supply terminal DC2+ does not supply 12V voltage, the auxiliary power supply terminal DC1+ supplies 12V voltage to the battery to charge the battery;

the circuit principle is as follows: the current flows through the resistor R1, the resistor R5 and the G pole of the crystal turn tube SCR, and the current is smaller and does not meet the conduction condition of the anode A and the cathode K of the crystal turn tube SCR, so that the capacitor C1 is charged by the current; when the voltage reaches the turn-on voltage of the NMOS tube Q1, the current flows through the resistor R2 and then flows through the G pole of the SCR, at the moment, the current meets the turn-on current of the G pole of the SCR, the voltage of the anode A of the SCR is higher than that of the cathode K, the turn-on condition of the SCR is met, the turn-on of the SCR enables the auxiliary power supply end DC1+ to be directly added to the control coil of the relay RY1, and then the relay RY1 is closed; and is magnetically reset by diode D1 when RY1 is turned off.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel charger BMS power supply selection circuit, includes resistance R1 ~ R5, diode D1, NMOS pipe Q1, brilliant circle pipe SCR, zener diode ZD1, electric capacity C1 and relay RY1, its characterized in that: two poles of the resistor R1 are respectively connected with an auxiliary power supply end DC1+ and a resistor R5, the resistor R5 is connected with the G pole of the thyristor SCR, two poles of the capacitor C1 are respectively connected with the circuit interfaces of the resistor R1 and the resistor R5, two poles of the resistor R2 are respectively connected with the end + of the auxiliary power supply DC1 and the D pole of the NMOS tube Q1, the G pole and the S pole of the NMOS tube Q1 are respectively connected with the circuit interfaces of the resistor R1 and the resistor R5, the A pole and the K pole of the SCR are respectively connected with the end + of an auxiliary power supply DC1 and a diode D1, the diode D1 is connected with the 3-pin circuit interface of the relay RY1, the pins 1 and 2 of the relay RY1 are respectively connected with an auxiliary power supply end DC1+ and a BMS power supply end DC2+, the pin 3 of the relay RY1 is connected with the resistor R2, the pin 4 of the relay RY1 is connected with the K pole circuit interface of the crystal turn tube SCR, the resistor R2 is connected to the ground terminal, and two poles of the resistor R4 are respectively connected to a K-pole circuit interface of the SCR and a BMS power supply terminal DC2 +.

2. The novel charger BMS power supply selection circuit of claim 1, characterized in that: the power supply voltages of the auxiliary power supply terminal DC1+ and the BMS power supply terminal DC2+ are both 12V.

3. The novel charger BMS power supply selection circuit of claim 1, characterized in that: the zener diode ZD1 is connected in parallel to two poles of the capacitor C1.