CN211786657U - Control circuit with interlocking function - Google Patents

Abstract

The utility model relates to a control circuit with interlocking function, the circuit includes control module, function module, a plurality of object modules that are connected with the function module output electricity, be connected with the second between function module and a plurality of object modules and switch on the module; the control circuit also comprises a selection switch module arranged at the output end of the control module and a first conduction module connected between the selection switch module and the second conduction module; the number of the used output ends of the selection switch modules and the number of the first conduction modules are correspondingly multiple; the selection switch module controls one of the first conduction modules to be conducted and the rest to be turned off according to the output signal of the control module, and the currently conducted first conduction module controls the second conduction module to be conducted, so that the function module is only communicated with the object module matched with the currently conducted first conduction module and is not communicated with the rest object modules. The control circuit improves the safety and performance of the product.

Description

Control circuit with interlocking function

Technical Field

The utility model relates to a control circuit field especially relates to a control circuit with interlocking function.

Background

In order to save development cost, the same function or module in many electronic products can be used by different objects at different time periods, that is, one module can be used by only one object at the same time period. For example the car fills electric pile, an automobile fills electric pile and generally has two or two above rifle that charge, can support to charge simultaneously for many cars, and this type fills electric pile mostly is split type of high-power type, and its inside can have a plurality of modules that charge, need accomplish output allocable when the rifle power supply charges to the difference.

Use a 120KW components of a whole that can function independently to fill electric pile as the example, its inside has 6 modules of charging, every module of charging is 20KW, if should fill electric pile and have two rifle A and B that charge, it charges for c car and D car respectively to charge when A rifle and B rifle that charge simultaneously, and A rifle that charges needs 300V electric power, B charges when the rifle will 500V electric power, just need guarantee that same module of charging can only serve one rifle that charges, otherwise will be because A rifle and B rifle demand are different, cause this module of charging excessive pressure, thereby cause the safety problem.

In other words, for such electronic products, it is important to ensure that the same module cannot output power to multiple objects at the same time for safety or performance reasons, and how to reliably distribute the power of the module. At present, the problem is mainly solved by software, but with the continuous upgrade of the functions and requirements of electronic products, the complexity of software is also continuously improved, and the development cost is continuously increased, so that it is necessary to try to improve from a hardware circuit.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, an object of the present invention is to provide a control circuit with interlock function, which has a simple structure and can effectively realize that the same module can only serve the same object in the same time period.

In order to realize the purpose, the technical scheme of the utility model is that: a control circuit having an interlock function, the circuit comprising a control module, a function module, a plurality of object modules electrically connected to an output of the function module, characterized in that:

a second conduction module is connected between the functional module and the plurality of object modules;

the control circuit also comprises a selection switch module arranged at the output end of the control module and a first conduction module connected between the selection switch module and the second conduction module;

the number of the used output ends of the selection switch modules and the number of the first conduction modules are correspondingly provided;

the selection switch module controls one of the first conduction modules to be conducted and the rest to be turned off according to the output signal of the control module, and the currently conducted first conduction module controls the second conduction module to be conducted, so that the function module is only communicated with the object module matched with the currently conducted first conduction module and is not communicated with the rest object modules.

Furthermore, the number of the second conduction modules is equal to that of the first conduction modules, the output ends of the function modules are correspondingly provided with a plurality of output ends, and the second conduction modules are correspondingly connected with the first conduction modules, the plurality of output ends of the function modules and the plurality of object modules respectively.

Further, the first conducting module comprises a first conducting part, a second conducting part cascaded with the first conducting part and a first pull-in switch connected with the second conducting part;

the first conduction part and the second conduction part are different in conduction state, and the first attraction switch is connected with the second conduction module and controls the conduction state of the second conduction module.

Further, the first conducting part is a first NPN type triode, and the second conducting part is a second NPN type triode;

the base electrode of the first NPN type triode is connected with the output end of the selection switch module, the emitting electrode of the first NPN type triode is grounded, the collector electrode of the first NPN type triode is connected with the base electrode of the second NPN type triode, the emitting electrode of the second NPN type triode is grounded, and the collector electrode of the second NPN type triode is connected with the first pull-in switch.

Further, the first pull-in switch is a first relay, a coil part of the first relay is connected with a collector of the second NPN type triode, and a contact point part of the first relay is connected with the second conduction module.

Further, the second conduction module is constituted by a second relay, a coil portion of the second relay is connected to a contact portion of the first relay, and a contact portion of the second relay is connected between the function module and the object module.

Further, the selection switch module is a high-speed low-delay decoder with two-wire input and four-wire output, and the used output ends of the decoder are two.

Furthermore, the second relay is also provided with a signal output end, and the signal output end is connected with the control module;

the control circuit also comprises a power supply master control module connected with the control module, and the power supply master control module is connected with a power supply end of a coil part of the first relay to supply power;

the control module controls the on-off of the power supply master control module according to the signal output by the signal output end so as to determine the on-off of the first relay.

Further, the power supply master control module comprises a power supply module, a third NPN type triode and a third relay;

and the base electrode of the third NPN type triode is connected with the control module, the emitting electrode of the third NPN type triode is grounded, the collector electrode of the third NPN type triode is connected with the coil part of the third relay, one end of the contact part of the third relay is connected with the power supply module, and the other end of the contact part of the third relay is connected with the power supply end of the coil part of the first relay.

Further, the functional module is a power output module, and the object module is a charging gun.

Compared with the prior art, the utility model has the advantages of: through setting up the selector switch module and the first module that switches on that links to each other with a plurality of output terminals of selector switch module, decide one of them first module that switches on and all the other do not switch on by the selector switch module according to control module's output signal, then control the second and switch on the module and switch on, make function module and with the present first module assorted object module that switches on communicate and with the rest object module not, thereby effectively realized the purpose that a function module only works for an object module in the same time quantum, realized the interlocking of function module to between a plurality of object modules, the security and the performance of product have been improved.

Drawings

Fig. 1 is a block diagram of an overall structure of a control circuit having an interlock function according to the present application.

Fig. 2 is a block diagram of a preferred circuit structure of the control circuit with the interlock function without the power supply total control module.

Fig. 3 is a schematic circuit diagram of a control module and a selection switch module according to the present application.

Fig. 4 is a schematic circuit diagram of the first pass module.

Fig. 5 is a circuit schematic diagram of the power supply total control module.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Fig. 1 to 2 show a preferred embodiment of the present invention. The control circuit with the interlocking function comprises a control module 1, a function module 2 and a plurality of object modules 3 electrically connected with the output end of the function module 2. As mentioned above, the control circuit is often used in situations where a function module is shared by a plurality of object modules in an electronic product, and in such situations, it is necessary to allocate a current time period, and the function module is preferentially used by an object module while eliminating the problem of sharing other object modules, such as the problem of power allocation of a power output module of a charging pile in the field of charging piles. The function module is specifically used for playing a role, and the specific reason why the object module is used can be determined by actual needs. In the present application, since the field of charging piles is taken as an example, the functional module is a power output module, and the plurality of objects are a plurality of charging guns.

In order to solve the problem of priority, in the application, a second conduction module 4 is connected between the function module 2 and a plurality of object modules 3, meanwhile, the control circuit further comprises a selection switch module 5 arranged at the output end of the control module 1, and a first conduction module 6 connected between the selection switch module 5 and the second conduction module 4, the number of the output ends of the selection switch module 5 and the number of the first conduction modules 6 are respectively provided in a plurality, the selection switch module 5 can control one of the first conduction modules 6 to be conducted and the rest to be turned off according to the output signal of the control module 1, and the currently conducted first conduction module 6 controls the second conduction module 4 to be conducted, so that the function module 2 is only communicated with the object module 3 matched with the currently conducted first conduction module 6 and is not communicated with the rest of the object modules 3, thereby realizing the interlocking among the plurality of first conduction modules 6, i.e. to thereby achieve interlocking between a plurality of object modules 3.

In other words, after the functional module 2 is connected with one of the object modules 3, the remaining object modules 3 can no longer be connected with the functional module 2, so that the functional module 2 can only serve one object module 3 within a period of time, thereby ensuring the overall performance and safety performance of the product.

In this embodiment, the number of the second conduction modules 4 and the number of the used output ends of the function modules 2 are also equal to the number of the first conduction modules 6, and the second conduction modules 4 are correspondingly connected to the first conduction modules 6, the plurality of output ends of the function modules 2, and the plurality of object modules 3, as shown in fig. 1-2.

As shown in fig. 4, the first conducting module 6 includes a first conducting component 61, a second conducting component 62 cascaded with the first conducting component 61, and a first attraction switch 63 connected to the second conducting component 62, where the conducting states of the first conducting component 61 and the second conducting component 62 are different, and the first attraction switch 62 is connected to the second conducting module 4 to control the conducting state of the second conducting module 4, so as to control the conduction of the second conducting module 4 by the conducting first conducting module 6.

The charging pile in this embodiment has two charging guns, so the value of "multiple" is 2, and since the structures of the first conduction modules 6 are the same, for convenience of description, the first conduction module 6 is taken as an example for description. With continued reference to fig. 4, the first conducting component 61 of the first conducting module 6 is a first NPN transistor V5, the second conducting component 62 is a second NPN transistor V1, a base of the first NPN transistor V5 is connected to the output terminal of the selecting switch module 5, an emitter of the first NPN transistor V3526 is grounded, a collector of the first NPN transistor V3526 is connected to the base of the second NPN transistor V1, an emitter of the second NPN transistor V1 is grounded, and a collector of the second NPN transistor V1 is connected to the first sinking switch 63. The first pull-in switch 63 is a first relay K1, a coil part of the first relay K1 is connected to a collector of the second NPN transistor V1, and a contact part is connected to the second turn-on module 4.

Similarly, since the second conducting module 4 has a plurality of second conducting modules 4, which correspond to the number of the first conducting modules 6, that is, the value is 2, and for convenience of description, the first second conducting module 4 is taken as an example for explanation. The first and second turn-on modules 4 are formed of the second relay SW1, the coil part of the second relay SW1 is connected with the contact part of the first relay K1 and the contact part of the second relay SW1 is connected between the function module 2 and the object module 3, that is, between the power output module and the charging gun.

The selector switch module 5 in the present application is a high speed low latency decoder N4 with two wire inputs and four wire outputs, where two outputs YK _ M1B1(Y1) and YK _ M1B2(Y2) are used, see fig. 3. Meanwhile, it is to be noted that the control module 1 is an MCU, which belongs to the common technical knowledge known to those skilled in the art and is not redundant here.

In this embodiment, the MCU ports M _ PF3-M1_ CEO _ YK _ C (port a of chip N4) and M _ PF4-M1_ CE1_ YK _ C (port B of chip N4) output high and low level digital signals to control the outputs of two output ports Y1 and Y2 used by the digital decoder N4 device, the output port Y1 is connected to the first conducting module 6 where the relay K1 is located, and the output port Y2 is connected to the first conducting module 6 where the relay K2 is located. When the port a is at a high level and the port B is at a low level, Y1 outputs a low level, Y2 outputs a high level, at this time, YK _ M1B1 is equal to 0 (low level), YK _ M1B2 is equal to 1 (high level), the transistor V5 is turned off, V1 is turned on and operated, the transistor V6 is turned on and operated, and V2 is not operated, so that the corresponding relay K1 is operated, the relay K2 is not operated, and the external DO1 turns on the second relay SW1, that is, the second conducting module 4 where the second relay SW1 is located is turned on, and the external DO2 turns off the second relay SW2 and correspondingly turns off the second conducting module 4 where the second relay SW2 is located, so that the power output module 2 is communicated with the charging gun a, thereby providing service for the operation of the charging gun a while not being communicated with the charging gun B, and not providing service for the operation of the charging gun B.

When the N4 outputs YK _ M1B1 is 1 (high level) and YK _ M1B2 is 0 (low level), the situation is just opposite, the transistor V5 is turned on and operated, the transistor V1 is turned off, the relay K1 is not operated, the a charging gun relay SW1 corresponding to the external DO1 does not operate, the transistor V6 is turned off, the transistor V2 is turned on and operated, the relay K2 operates, and the B charging gun relay SW2 corresponding to the external DO2 operates, so that the power output module 2 serves as a B charging gun and is disconnected from an a charging gun, and thus, the purpose that the same power output module can only operate as the a charging gun or the B charging gun in the same time period is achieved through the interlocking control over the relay K1 and the relay K2.

In the present application, the second relay SW1/SW2 further has a signal output terminal xh connected to the control module 1, the control circuit with the interlock function further includes a power total control module 7 connected to the control module 1, the power total control module 7 is connected to the power terminal of the coil portion of the first relay K1/K2 for supplying power, the control module 1 controls the power total control module 7 to be turned on and off according to the signal output by the signal output terminal xh, and then determines the turning on and off of the first relay K1/K2, that is, the SW1/SW2 outputs the signal xh to the control module 1, the control module 1 determines whether the current relays K1 and K2 are normal or not according to the current high and low level signals output by the M _ PF3-M1_ CEO _ YK _ C port and the M _ PF4-M1_ CE1_ YK _ C port and combines the signal xh to determine whether the current relays K1 and K2 are normal or not, if abnormal, such as being unable to be opened or, then, a corresponding high level or low level signal is output to the power master control module 7 through the output port M _ PE2_ ZK _ YK _ C, so that the power master control module is powered off, and the power supply to the power supply terminal of the relay K1/K2 is cut off, so as to protect the rear-end devices and equipment.

Specifically, as shown in fig. 5, the power master control module 7 includes a power module 71, a third NPN transistor V17, and a third relay K9, wherein the base of the third NPN transistor V17 is connected to the control module 1, the emitter is grounded, the collector is connected to the coil portion of the third relay K9, and the contact portion of the third relay K9 has one end connected to the power module 71 and the other end connected to the power terminal of the coil portion of the first relay K1/K2. When K1 and K2 are abnormal, the power supplies 5V (1) of the two are controlled, namely K9 is disconnected, so that the power supplies of K1/K2 are all turned off, and no output is output from the relay K1/K2, so that the back-end circuit is protected.

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

Claims (10)

1. A control circuit with an interlock function, the circuit comprising a control module (1), a function module (2), a plurality of object modules (3) electrically connected to an output of the function module (2), characterized in that:

a second conduction module (4) is connected between the functional module (2) and the object modules (3);

the control circuit also comprises a selection switch module (5) arranged at the output end of the control module (1) and a first conduction module (6) connected between the selection switch module (5) and the second conduction module (4);

the number of the used output ends of the selection switch modules (5) and the number of the first conduction modules (6) are correspondingly multiple;

the selection switch module (5) controls one of the first conduction modules (6) to be conducted and the rest to be turned off according to the output signal of the control module (1), and the currently-conducted first conduction module (6) controls the second conduction module (4) to be conducted, so that the function module (2) is only communicated with the object module (3) matched with the currently-conducted first conduction module (6) and is not communicated with the rest object modules (3).

2. The control circuit with interlock function according to claim 1, characterized in that:

the number of the second conduction modules (4) and the number of the used output ends of the functional modules (2) are correspondingly multiple, and the second conduction modules (4) are correspondingly connected with the first conduction modules (6), the multiple output ends of the functional modules (2) and the multiple object modules (3) respectively.

3. The control circuit with interlock function according to claim 2, characterized in that:

the first conduction module (6) comprises a first conduction part (61), a second conduction part (62) in cascade connection with the first conduction part (61) and a first suction switch (63) connected with the second conduction part (62);

the first conducting part (61) and the second conducting part (62) are different in conducting state, and the first attracting switch (63) is connected with the second conducting module (4) to control the conducting state of the second conducting module (4).

4. The control circuit with interlock function according to claim 3, characterized in that:

the first conducting part (61) is a first NPN type triode, and the second conducting part (62) is a second NPN type triode;

the base electrode of the first NPN type triode is connected with the output end of the selection switch module (5), the emitting electrode of the first NPN type triode is grounded, the collector electrode of the first NPN type triode is connected with the base electrode of the second NPN type triode, the emitting electrode of the second NPN type triode is grounded, and the collector electrode of the second NPN type triode is connected with the first pull-in switch (63).

5. The control circuit with interlock function according to claim 4, characterized in that:

the first attraction switch (63) is a first relay, a coil part of the first relay is connected with a collector of the second NPN type triode, and a contact part of the first relay is connected with the second conduction module (4).

6. The control circuit with interlock function according to claim 2, characterized in that:

the second conduction module (4) is composed of a second relay, a coil part of which is connected with a contact part of the first relay, and a contact part of which is connected between the function module (2) and the object module (3).

7. The control circuit with interlock function according to claim 1, characterized in that:

the selection switch module (5) is a high-speed low-delay decoder with two-wire input and four-wire output, and the used output ends of the decoder are two.

8. The control circuit with interlock function according to claim 6, characterized in that:

the second relay is also provided with a signal output end (XH), and the signal output end (XH) is connected with the control module (1);

the control circuit further comprises a power supply master control module (7) connected with the control module (1), and the power supply master control module (7) is connected with a power supply end of a coil part of the first relay to supply power;

the control module (1) controls the on-off of the power supply master control module (7) according to the signal output by the signal output end (XH) so as to determine the on-off of the first relay.

9. The control circuit with interlock function according to claim 8, characterized in that:

the power supply master control module (7) comprises a power supply module (71), a third NPN type triode (V17) and a third relay (K9);

and the base electrode of the third NPN type triode (V17) is connected with the control module (1), the emitting electrode is grounded, the collector electrode of the third NPN type triode is connected with the coil part of the third relay (K9), one end of the contact part of the third relay (K9) is connected with the power supply module (71), and the other end of the contact part of the third relay is connected with the power supply end of the coil part of the first relay.

10. The control circuit with interlock function according to claim 1, characterized in that:

the functional module (2) is a power output module, and the object module (3) is a charging gun.

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