CN214279871U

CN214279871U - Drive circuit of high-voltage relay

Info

Publication number: CN214279871U
Application number: CN202022829830.9U
Authority: CN
Inventors: 冯艳锋; 田宇威; 林国军
Original assignee: Shenzhen Busbar Sci Tech Development Co Ltd
Current assignee: Shenzhen Busbar Sci Tech Development Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-09-24
Anticipated expiration: 2030-11-30

Abstract

The utility model provides a drive circuit of high-voltage relay through utilizing a darlington array chip, is connected its input port with the pin of singlechip, and output port and 6 signal relay are connected, and 6 signal relay is connected with 6 high-voltage relay respectively, constitute a drive circuit that can drive 6 high-voltage relay simultaneously, through the utility model provides a high-voltage relay drive circuit can be on the basis of the same quantity relay of drive, reduce required drive circuit's quantity, and then simplify the overall design of circuit.

Description

Drive circuit of high-voltage relay

Technical Field

The utility model relates to a drive circuit especially relates to a high-voltage relay's drive circuit.

Background

There are a plurality of high voltage direct current relay on direct current fills electric pile, especially the direct current that present intelligent power distributes fills electric pile's the appearance, and high voltage relay's number is just more, so high voltage relay's drive circuit quantity also can increase along with the increase of high voltage relay quantity.

Traditional high voltage relay's drive mode is mostly with the MOS pipe, the RC circuit, freewheel diode etc. constitute drive circuit and external on high voltage relay, every drives a high voltage relay, just need external drive circuit, when the relay number is many, the drive circuit that needs is also more, the MOS pipe that uses, the RC circuit, electronic device such as freewheel diode also correspondingly increases, not only make whole circuit more complicated, and the inefficiency has taken more charge controller PCB's area, the increase of cost has indirectly been leaded to, therefore, how to use drive more high voltage relay more with drive circuit becomes the technical problem that technical field technical staff need solve.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high voltage relay's drive circuit can simplify whole circuit by a wide margin on the basis of drive the same quantity relay.

The utility model provides a following scheme:

a driving circuit of a high-voltage relay comprises a Darlington array chip U1, signal relays K1, K2, K3, K4, K5 and K6, wherein

input ports

1B, 2B, 3B, 4B, 5B and 6B of the Darlington array chip U1 are respectively connected with a single chip microcomputer pin RELAYDRIVE _ A, RELAYDRIVE _ B, RELAYDRIVE _ C, RELAYDRIVE _ D, RELAYDRIVE _ E, RELAYDRIVE _ F,

output ports

1C, 2C, 3C, 4C, 5C and 6C of the Darlington array chip U1 are respectively connected with the signal relays K1, K2, K3, K4, K5 and K6, and the signal relays K1, K2, K3, K4, K5 and K6 are respectively connected with the high-voltage relay.

Preferably, the signal relays K1, K2, K3, K4, K5 and K6 are connected to the high-voltage relay through connecting terminals P1, P2, P3, P4, P5 and P6, respectively.

Preferably, the terminals P1, P2, P3, P4, P5 and P6 are plug terminals with two holes, wherein the first hole is connected with the signal relay, and the second hole is used for grounding.

Preferably, one end of the contact pin of the signal relay K1, K2, K3, K4, K5 and K6 is connected with the high-voltage relay through a connecting terminal P1, P2, P3, P4, P5 and P6, and the other end is connected with a power supply with the voltage of 12V.

Preferably, one end of each coil pin of the signal relays K1, K2, K3, K4, K5 and K6 is connected to the

output ports

1C, 2C, 3C, 4C, 5C and 6C of the darlington array chip U1, and the other end of each coil pin is connected to a power supply with a voltage of 5V.

Preferably, the darlington array chip U1 is a 7-way inverter circuit array chip, and its

internal output ports

1C, 2C, 3C, 4C, 5C, 6C, and 7C are all integrated with freewheeling diodes, and the integration mode is that each output port is reversely connected with a freewheeling diode in parallel.

Preferably, 7 groups of darlington triodes are integrated in the darlington array chip U1.

Preferably, the model of the Darlington array chip U1 is ULN2003V 12.

Preferably, the signal relays K1, K2, K3, K4, K5 and K6 are in the models of HF49FD-005-1H 11.

Preferably, the model numbers of the wiring terminals P1, P2, P3, P4, P5 and P6 are TP 381H-20V-2P.

The utility model discloses a following technological effect:

the utility model provides a pair of high voltage relay's drive circuit, under the condition that only uses 1 drive circuit, can drive 6 high voltage relay simultaneously, compare with traditional one-to-one high voltage relay drive circuit, not only on the basis of driving the same quantity relay, required drive circuit's quantity has been reduced, the drive efficiency has been improved, and, darlington triode and freewheel diode have been integrated at driver chip internal portion, do not need external circuit to add separately, the use of electronic component has been reduced, the production cost is saved, the overall design of circuit has also been simplified simultaneously, the wiring degree of difficulty of circuit board has been reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and 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 these drawings without creative efforts.

Fig. 1 is a schematic diagram of a circuit structure provided by an embodiment 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 all belong to the protection scope of the present invention.

Specific implementations are described below.

A drive circuit of a high-voltage relay is shown in figure 1 and comprises a Darlington array chip and 6 signal relays, wherein an input port of the Darlington array chip is connected with a pin of a single chip microcomputer respectively, an output port of the Darlington array chip is connected with the signal relays K1, K2, K3, K4, K5 and K6 respectively, and the 6 signal relays are connected with the 6 high-voltage relays respectively.

Specifically, the signal relays K1, K2, K3, K4, K5 and K6 are respectively connected with high-voltage relays (not shown in the figure) through wiring terminals P1, P2, P3, P4, P5 and P6, wherein, the pins of the signal relays K1, K2, K3, K4, K5 and K6 are divided into contact pins and coil pins, one end of a contact pin is connected with the high-voltage relay through wiring terminals P1, P2, P3, P4, P5 and P6, the other end is connected with a power supply with the voltage of 12V, one end of a coil pin is respectively connected with

output ports

1C, 2C, 3C, 4C, 5C and 6C of the Darlington array chip U1, the other end of the coil pin is respectively connected with a power supply with the voltage of 5V, the signal relay mainly plays a role in isolation, and the high-voltage relay is isolated from pins of the single chip microcomputer, so that the high-voltage relay is prevented from being abnormal and influencing the stability of the single chip microcomputer.

Specifically, the connecting terminals P1, P2, P3, P4, P5 and P6 are plug-in connecting terminals with two holes, wherein the first hole is connected with the signal relay, and the second hole is used for grounding, so that the high-voltage relay can be driven only by controlling the positive voltage input of the high-voltage relay.

Specifically, the darlington array chip U1 may be a 7-way inverter circuit array chip, where the input ports and the output ports are 7, and 7 groups of darlington triodes (not shown in the figure) are integrated inside the 7-way inverter circuit array chip, the integration mode is that the input ends of the darlington triodes are connected with the input ports of the chip, the output ends of the darlington triodes are connected with the output ports of the chip, and the 7 groups of darlington triodes are respectively connected in series with 7 input ports and 7 output ports of the 7-way inverter circuit array chip in a one-to-one correspondence manner, such as one group of darlington triodes, where the input end is connected with the input port 1B of the chip, and the output end is connected with the output port 1C of the chip; and the

output ports

1C, 2C, 3C, 4C, 5C, 6C, 7C inside the 7-way inverter circuit array chip are all integrated with freewheeling diodes, and the integration mode is that each output port is reversely connected with a freewheeling diode in parallel (not shown in the figure).

Specifically, the utility model provides a drive circuit, its theory of operation as follows:

taking a high-voltage relay which is connected with a connecting terminal P1 in a driving mode as an example, when a single chip microcomputer pin RELAYDRIVE _ A inputs a high level, an output end C1 of a Darlington array chip U1 is a low level, the voltage of an input signal relay K1 is a low voltage, a contact of a signal relay K1 is closed at the moment, a first hole of the connecting terminal P1 is connected and conducted with a power supply with the voltage of 12V, the coil of the high-voltage relay has the voltage of 12V at the moment, and the high-voltage relay is closed; on the contrary, when the single chip pin RELAYDRIVE _ a inputs a low level, the output terminal C1 of the darlington array chip U1 is a high level, the voltage of the input signal relay K1 is a high voltage, the contact of the signal relay K1 is disconnected at the moment, the connection between the first hole of the wiring terminal P1 and the power supply with the voltage of 12V is disconnected, the high-voltage relay coil has no voltage at the moment, and the high-voltage relay is disconnected, namely, the driving process of the high-voltage relay.

Similarly, the driving process of the high-voltage relay connected to the connection terminals P2, P3, P4, P5, and P6 is the same as that described above, and therefore, the description thereof is omitted.

Specifically, the model number of the darlington array chip U1 may be ULN2003V 12.

Specifically, the signal relays K1, K2, K3, K4, K5, K6 may be of the type HF49FD-005-1H 11.

Specifically, the model of the wiring terminals P1, P2, P3, P4, P5 and P6 can be TP 381H-20V-2P.

The utility model provides a drive circuit, through utilizing an internal integration 7 darlington triodes, and every output port of inside all integrates the darlington array chip of the 7 way reverser circuit arrays that have freewheeling diode, be connected its input port with the pin of singlechip, the output port is connected with 6 signal relay's coil pin, 6 signal relay's contact pin respectively with 6 high-voltage relay coil connections, constitute a drive circuit that can drive 6 high-voltage relay simultaneously.

Can know through the description of above embodiment, the utility model provides a pair of high voltage relay's drive circuit, under the condition that only uses 1 drive circuit, can drive 6 high voltage relay simultaneously, compare with traditional one-to-one high voltage relay drive circuit, not only on the basis of the relay of the same quantity of drive, required drive circuit's quantity has been reduced, the drive efficiency is improved, moreover, darlington triode and freewheeling diode have been integrated to the drive chip inside, do not need external circuit to add separately, electronic component's use has been reduced, the production cost is saved, the overall design of circuit has also been simplified simultaneously, the wiring degree of difficulty of circuit board has been reduced.

The above detailed description is made on the driving circuit of the high-voltage relay provided by the present invention, and the detailed examples are applied herein to explain the principles and embodiments of the present invention, and the description of the above embodiments is only used to help understand the method and core ideas of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A drive circuit of a high-voltage relay is characterized in that: the darlington array chip comprises a darlington array chip U1, signal relays K1, K2, K3, K4, K5 and K6, input ports 1B, 2B, 3B, 4B, 5B and 6B of the darlington array chip U1 are respectively connected with a single chip microcomputer pin RELAYDRIVE _ A, RELAYDRIVE _ B, RELAYDRIVE _ C, RELAYDRIVE _ D, RELAYDRIVE _ E, RELAYDRIVE _ F, output ports 1C, 2C, 3C, 4C, 5C and 6C of the darlington array chip U1 are respectively connected with the signal relays K1, K2, K3, K4, K5 and K6, and the signal relays K1, K2, K3, K4, K5 and K6 are respectively connected with a high-voltage relay.

2. The drive circuit of a high-voltage relay according to claim 1, characterized in that:

the signal relays K1, K2, K3, K4, K5 and K6 are respectively connected with the high-voltage relay through wiring terminals P1, P2, P3, P4, P5 and P6.

3. The drive circuit of a high-voltage relay according to claim 2, characterized in that:

the wiring terminals P1, P2, P3, P4, P5 and P6 are plug-in wiring terminals with two holes, wherein the first hole is connected with the signal relay, and the second hole is used for grounding.

4. The drive circuit of a high-voltage relay according to claim 3, characterized in that:

one end of a contact pin of each of the signal relays K1, K2, K3, K4, K5 and K6 is connected with the high-voltage relay through a wiring terminal P1, a wiring terminal P2, a wiring terminal P3, a wiring terminal P4, a wiring terminal P5 and a wiring terminal P6, and the other end of the contact pin is connected with a power supply with the voltage of 12V.

5. The drive circuit of a high-voltage relay according to claim 1, characterized in that:

coil pins of the signal relays K1, K2, K3, K4, K5 and K6 are respectively connected with output ports 1C, 2C, 3C, 4C, 5C and 6C of the Darlington array chip U1 at one end, and respectively connected with a power supply with the voltage of 5V at the other end.

6. The drive circuit of a high-voltage relay according to claim 1, characterized in that:

the Darlington array chip U1 is a 7-path inverter circuit array chip, and output ports 1C, 2C, 3C, 4C, 5C, 6C and 7C of the Darlington array chip are all reversely connected with a freewheeling diode in parallel.

7. The drive circuit of a high-voltage relay according to claim 1, characterized in that:

7 groups of Darlington triodes are integrated in the Darlington array chip U1.

8. The drive circuit of a high-voltage relay according to claim 1, characterized in that:

the model of the Darlington array chip U1 is ULN2003V 12.

9. The drive circuit of a high-voltage relay according to claim 1, characterized in that:

the signal relays K1, K2, K3, K4, K5 and K6 are HF49FD-005-1H 11.

10. The drive circuit of a high-voltage relay according to claim 2, characterized in that:

the types of the wiring terminals P1, P2, P3, P4, P5 and P6 are TP 381H-20V-2P.