CN215284400U - Control device of main power loop - Google Patents
Control device of main power loop Download PDFInfo
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- CN215284400U CN215284400U CN202121220208.6U CN202121220208U CN215284400U CN 215284400 U CN215284400 U CN 215284400U CN 202121220208 U CN202121220208 U CN 202121220208U CN 215284400 U CN215284400 U CN 215284400U
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Abstract
The application provides a controlling means of main power return circuit, and this controlling means includes bistable relay, closed relay drive circuit, disconnection relay drive circuit, MCU chip, SBC power module, control pulse output module, first diode and the second diode based on the chip. The bistable relay is connected to the main power loop. When the main power circuit needs to be switched on, the main power circuit can be switched on and kept in a switched-on state only by outputting a switching-on driving signal with a short time to the bistable relay through the switching-on relay driving circuit, and long-time switching-on driving is not required to be kept, so that the energy consumption can be reduced.
Description
Technical Field
The application relates to the technical field of new energy vehicles, in particular to a control device of a main power loop.
Background
On the new energy automobile driven by electricity, a power switch is arranged on a main power loop for supplying power to a motor and is used for cutting off or closing the main power loop. The power switch generally adopts a relay or a contactor, and when a main power loop needs to be conducted, a control loop of the relay or the contactor is required to be always kept in a power supply state, so that more power consumption is caused.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present application provides a control apparatus for a main power loop, which is used to reduce energy consumption.
In order to achieve the above object, the following solutions are proposed:
the application provides a controlling means of main power return circuit, including bistable relay, closed relay drive circuit, disconnection relay drive circuit, MCU chip, SBC power module, control pulse output module, first diode, the second diode based on the chip, wherein:
the control pulse output module comprises a first control pulse output chip, a second control pulse output chip and a pulse conversion circuit;
the bistable relay is connected to the main power loop and used for closing the main power loop based on a received closing driving signal or opening the main power loop based on a received opening driving signal;
the input end of the closed relay driving circuit is connected with one control output end of the MCU chip, the output end of the closed relay driving circuit is connected with the signal input end of the bistable relay, and the closed relay driving circuit is used for outputting a closed driving signal to the signal input end of the bistable relay based on a closed control signal output by the control output end;
the input end of the disconnecting relay driving circuit is connected with the other control output end of the MCU chip through the first diode, the output end of the disconnecting relay driving circuit is connected with the other signal input end of the bistable relay, and the disconnecting relay driving circuit is used for outputting a disconnecting driving signal to the other signal input end of the bistable relay based on a disconnecting control signal output by the other control output end;
the SBC power supply module is provided with a first electric output end which supplies power to the MCU chip;
the input end of the first control pulse output chip is connected with the working state output end of the MCU chip, the output end of the first control pulse output chip is connected with the input end of the pulse conversion circuit, and the output end of the pulse conversion circuit is connected with the output end of the second control pulse output chip;
the first control pulse output chip responds to a falling edge signal output by the working state output end and converts the falling edge signal into a high-level pulse signal, the pulse conversion circuit receives the high-level pulse signal output by the first control pulse output chip and converts the high-level pulse signal into a falling edge signal for the second control pulse output chip to identify, and the second control pulse output chip responds to the falling edge signal and outputs a disconnection control signal to the bistable relay.
Optionally, the control pulse output module further includes a redundant power supply module, and the redundant power supply module is electrically connected to the first control pulse output chip, the second control pulse output chip, and the pulse conversion circuit, respectively.
Optionally, the pulse converting circuit includes a first resistor, a second resistor, a third resistor, a first switching element, a third switching element, a second switching element, a third diode, and a fourth diode, where:
the redundant power supply module is provided with a second electric output end, the second electric output end is respectively and electrically connected with one end of the first resistor, one end of the second resistor and one end of the third switching element, and the other end of the third switching element is connected with the input end of the second control pulse output chip;
an output end of the first control pulse output chip is connected with a control signal input end of the first switching element, and an output end of the first control pulse output chip is configured to output a high-level pulse signal when the working state output end outputs a falling edge signal;
one end of the first switch element is connected with the other end of the first resistor and the control signal input end of the second switch element respectively, the other end of the first switch element is grounded, and one end of the second switch element is connected with the control signal input end of the third switch element and the other end of the second resistor through a third resistor respectively;
an input end of the second control pulse output chip is connected with the other end of the third switching element, an output end of the second control pulse output chip is connected with an input end of the disconnection relay drive circuit through a second diode, and the output end of the second control pulse output chip is configured to output the disconnection control signal when the other end of the third switching element outputs a falling edge signal;
the other end of the first resistor is connected with a control signal input end of the second switch element through a third diode;
the SBC power supply module is provided with a safety state output end, and the safety state output end is connected with a control signal input end of the third switching element through the fourth diode.
Optionally, the power supply protection circuit further comprises a power supply protection circuit, wherein:
and the external power supply is electrically connected with the closed relay drive circuit, the open relay drive circuit, the SBC power supply module and the redundant power supply module through the power supply anti-reverse circuit.
Optionally, the system further comprises a power supply voltage feedback module, wherein:
and the sampling input end of the power supply voltage feedback circuit is connected with the external power supply, and the sampling output end of the power supply voltage feedback circuit is connected with the MCU chip.
Optionally, the first control pulse output chip and the second control pulse output chip are both HEF4538 chips.
According to the technical scheme, the control device of the main power loop comprises a bistable relay, a closed relay driving circuit, an open relay driving circuit, an MCU chip, an SBC power module, a control pulse output module based on the chip, a first diode and a second diode. The bistable relay is connected to the main power loop; the input end of the closed relay driving circuit is connected with one control output end of the MCU chip, and the output end of the closed relay driving circuit is connected with the signal input end of the bistable relay; the input end of the disconnecting relay driving circuit is connected with the other control output end of the MCU chip, and the output end of the disconnecting relay driving circuit is connected with the signal input end of the bistable relay through a first diode; the SBC power supply module is used for supplying power to the MCU chip; the input end of the control pulse output module is connected with the working state output end of the MCU chip, and the output end of the control pulse output module is connected with the output end of the disconnection relay drive circuit through a second diode. When the main power circuit needs to be switched on, the main power circuit can be switched on and kept in a switched-on state only by outputting a switching-on driving signal with a short time to the bistable relay through the switching-on relay driving circuit, and long-time switching-on driving is not required to be kept, so that the energy consumption can be reduced.
In addition, the control pulse output module can output a disconnection control signal to the disconnection relay driving circuit when the whole control device stops running due to faults, namely the MCU chip stops working, so that the main power loop is disconnected, namely the power supply of the main power loop is stopped, and the safety of a vehicle is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a circuit diagram of a control device of a main power loop according to an embodiment of the present application;
FIG. 2 is a circuit diagram of an alternative control arrangement for a main power loop in accordance with an embodiment of the present application;
FIG. 3 is a logic diagram of the HEF4538 chip;
fig. 4 is another circuit diagram of the control device according to the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
Fig. 1 is a circuit diagram of a control apparatus of a main power loop according to an embodiment of the present disclosure.
As shown in fig. 1, the control device provided in this embodiment is used to control a main power circuit 100 of an electrical device such as a new energy vehicle, that is, to effectively control the main power circuit to be turned off and turned on. The control device comprises a bistable relay K1, a closed relay drive circuit 10, an open relay drive circuit 20, an MCU chip 30, an SBC power module 40, a chip-based control pulse output module 50, a first diode D1 and a second diode D2.
The bistable relay is connected to the main power circuit, that is, the input end 101 of the main power circuit and the output end 102 thereof are electrically connected through the bistable relay, the bistable relay has two stable states of closing and opening, and the bistable relay keeps the current state under the condition that no control signal or control level is input; only when a corresponding control signal or control level is entered is the state from one state changed to the other, i.e. from open to closed or from closed to open.
The bistable relay is provided with two inputs, one of which is connected 11 to the output of the on-relay drive circuit and the other of which is connected 21 to the output of the off-relay drive circuit. The input end 12 of the closed relay driving circuit is connected with one control output end IO1 of the MCU chip, and the input end 22 of the open relay driving circuit is connected with the other control output end IO2 of the MCU chip through a first diode D1. That is, the other control output IO2 is connected to the anode of the first diode, and the cathode of the first diode is connected to the input terminal of the off-relay driving circuit.
The MCU chip 30 is an MCU with a safe function, and outputs a close control signal through a control output terminal connected to a close relay driving circuit when the main power loop needs to be turned on; when the main power loop needs to be turned off, the control signal is output through the control output end connected with the disconnecting relay drive circuit. The closing relay drive circuit outputs a closing drive signal to the bistable relay when receiving a closing control signal, and outputs an opening drive signal to the bistable relay when receiving an opening control signal.
The closed relay driving circuit and the open relay driving circuit are used for driving two coils of the bistable relay, and the driving types can be high-side driving, low-side driving, half-bridge driving, full-bridge driving and any combination of the above 4 types. The drive coil state is when the input is high level, and the drive coil is not driven when the input is low level.
The bistable relay K1 is closed when receiving a closing driving signal, so that the closing control of the main power loop is realized; the bistable relay K1 opens, i.e. opens the main power circuit, upon receiving the open drive signal. The close drive signal and the open drive signal are high level pulses of short duration. That is, the main power loop can be kept closed by the high level pulse with a short time length without long-time power-on.
The SBC power module 40 includes, but is not limited to, a TLF35584 chip that is based on the external power supply 200 and supplies power to the MCU chip 30 through the first electrical output 41, and is also connected to the SPI port of the MCU chip 30 through a signal line.
The control pulse output module in the application is built based on a control pulse output chip, and includes but is not limited to HEF4538, 74HC123 and the like. The control pulse output module 50 at least includes an input terminal 501 and an output terminal 502, the input terminal is connected to the working state output terminal of the MCU chip 30, and the output terminal is connected to the input terminal of the off relay driving circuit through a second diode D2. That is, the output terminal is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the input terminal of the off-relay drive circuit.
The operating state output terminal of the MCU chip 30 outputs a high level during the normal operation of the MCU, and stops outputting the high level when it fails, i.e., it outputs a falling edge signal when viewed from the outside. The control pulse output module is only sensitive to a falling edge signal, and outputs a high-level pulse signal through the output end of the control pulse output module when receiving the falling edge signal through the input end, namely outputs a disconnection control signal to the disconnection relay drive circuit.
According to the technical scheme, the control device of the main power loop of the new energy automobile comprises a bistable relay, a closed relay driving circuit, an open relay driving circuit, an MCU chip, an SBC power module, a chip-based control pulse output module, a first diode and a second diode. The control pulse output module comprises a first control pulse output chip 53, a second control pulse output chip 54, a redundant power supply module 52 and a pulse conversion circuit 55, and the bistable relay is connected to the main power loop; the input end of the closed relay driving circuit is connected with one control output end of the MCU chip, and the output end of the closed relay driving circuit is connected with the signal input end of the bistable relay; the input end of the disconnecting relay driving circuit is connected with the other control output end of the MCU chip, and the output end of the disconnecting relay driving circuit is connected with the signal input end of the bistable relay through a first diode; the SBC power supply module is used for supplying power to the MCU chip; the input end of the control pulse output module is connected with the working state output end of the MCU chip, and the output end of the control pulse output module is connected with the output end of the disconnection relay drive circuit through a second diode. When the main power circuit needs to be switched on, the main power circuit can be switched on and kept in a switched-on state only by outputting a switching-on driving signal with a short time to the bistable relay through the switching-on relay driving circuit, and long-time switching-on driving is not required to be kept, so that the energy consumption can be reduced.
The input end of the first control pulse output chip is connected with the working state output end of the MCU chip, the output end of the first control pulse output chip is connected with the input end of the pulse conversion circuit, the output end of the pulse conversion circuit is connected with the input end of the second control pulse output chip, and the output end of the second control pulse output chip is connected with the input end of the disconnecting relay drive circuit;
the first control pulse output chip responds to a falling edge signal output by the working state output end and converts the falling edge signal into a high-level pulse signal, the pulse conversion circuit receives the high-level pulse signal output by the first control pulse output chip and converts the high-level pulse signal into a falling edge signal for the second control pulse output chip to identify, and the second control pulse output chip responds to the falling edge signal and outputs a disconnection control signal to the bistable relay.
In addition, the control pulse output module can output a disconnection control signal to the disconnection relay driving circuit when the whole control device stops running due to faults, namely the MCU chip stops working, so that the main power loop is disconnected, namely the power supply of the main power loop is stopped, and the safety of a vehicle is ensured.
Example two
Fig. 2 is a circuit diagram of a control device of a main power circuit of another new energy vehicle according to an embodiment of the present application.
As shown in fig. 2, compared with the previous embodiment, the present embodiment provides an implementation scheme for the control pulse output module, that is, a specific structure of the control pulse output module is provided. In this embodiment, the pulse conversion circuit 55 includes:
a first resistor R1, a second resistor R2, a third resistor R3, a first switching element Q1, a second switching element Q2, a third switching element Q3, a third diode D3, and a fourth diode D4, and a collector of the third switching element is connected to a base of the second switching element through the third diode.
The first control pulse output chip and the second control pulse output chip are corresponding HEF4538 chips or modules of HEF4538, and a logic diagram of the HEF4538 chip is shown in fig. 3.
When considering that the sleep state and the SBC power module have functional safety failures, the IO of the MCU chip and the functional state SS2 (namely a safety state output end) output of the SBC power module are both in low level, so a time delay is needed to distinguish the sleep state from the SBC power module in the safety failure state, the time delay can be realized by the HEF4538 chip, the HEF4538 has the characteristics of falling edge input and high level output, and the duration of output pulses can be adjusted by Rext and Cext.
In implementing the technical solution of the present application, the switching element may be implemented by a triode or a MOS transistor, in this embodiment, the triode is used as the switching element, wherein the first switching element and the third switching element are NPN-type triodes, and the third switching element is a PNP-type triode.
The redundant power supply module 52 is provided with a second electrical output terminal 521, the second electrical output terminal 521 is electrically connected to one end of the first resistor R1, one end of the second resistor R2, and the emitter of the third switching element Q3, respectively, and the collector terminal of the third switching element Q3 is connected to the input terminal of the second control pulse output chip, that is, the collector terminal is used as the output terminal of the control pulse output module.
This redundant power module 52 can be LDO power module or DC/DC power module, and it is all to close all supplies power of SBC self when preventing SBC power 40 module to appear functional safety trouble, and the hardware of this system shuts off the logic circuit and needs the power supply, so increased the redundant power module 52 of uninterrupted power supply. To confirm that the redundant block circuit is normal, a back-extraction signal may also be added. The subsequent default redundant module power supply will be in a condition of continuously supplying power to the relevant module, and will not be described herein.
The input end of the first control pulse output chip 53 is connected to the Pre-sleep IO end of the operating state output end of the MCU chip, the output end of the first control pulse output chip is connected to the base of the first switching element Q1, and when the output end of the first control pulse output chip receives the falling edge signal output by the operating state output end of the MCU chip 30, the output end of the first control pulse output chip outputs a high level pulse signal to the base of the first switching element.
The collector of the first switching element Q1 is connected to the other end of the first resistor R1 and the base of the second switching element Q2, respectively, the emitter of the first switching element Q1 is grounded, and the collector of the second switching element Q2 is connected to the base of the third switching element Q3 and the other end of the second resistor R2, respectively, via a third resistor R3.
An input terminal of the second control pulse output chip 54 is connected to the collector of the third switching element Q3, an output terminal of the second control pulse output chip 54 is connected to an input terminal of the off-relay driving circuit through a second diode D2, and the second control pulse output chip 54 outputs a high-level pulse signal through an output terminal thereof upon receiving a falling edge signal output from the collector of the third switching element Q3.
In addition, the redundant power module 52 in this embodiment is also used to supply power to the first control pulse output chip 53 and the second control pulse output chip 41.
The SBC voltage module is provided with a safety state output 42 connected to the base of a second switching element Q2 via a fourth diode D4.
The safe state output is high when the SBC power supply 40 is operating normally, and stops outputting high when the module fails or is turned off, and falls to low when a falling edge signal is received from the base of the second switching element Q2. The falling edge signal is transmitted to the second control signal output module, so that the second control signal output module outputs a disconnection control signal to the disconnection relay driving circuit.
In addition, the technical solution of the present application further includes a power supply reverse prevention circuit 201 and a power supply voltage feedback module 202, as shown in fig. 4. And the external power supply is electrically connected with the closed relay drive circuit, the open relay drive circuit, the SBC power supply module and the redundant power supply module through the power supply anti-reverse circuit, so that power is supplied to each module or circuit. In addition, the sampling input end of the power supply voltage feedback circuit is connected with the external power supply and used for sampling the output voltage of the external power supply, and the sampling output end of the power supply voltage feedback circuit is connected with the MCU chip so as to output a sampling signal to the MCU chip, so that the MCU chip monitors the external power supply.
The control device can realize the following working modes:
1. and (4) a normal working mode.
When the control device normally works, the working state output end of the MCU chip and the safety state output end of the SBC power module are both high level, so that the third switching element can be driven to be opened, the second switching element cannot be turned off, and the input of the second control pulse output chip module is high level (only identifying the falling edge), so that the output end of the second control pulse output chip outputs low level, and the work of the disconnection driving module is completely normally controlled by the MCU chip. The closed driving module is also normally controlled by the MCU chip. The MCU chip can normally control all functions according to the related voltage of the extraction and the related function requirements.
2. A sleep mode is entered.
When the control device enters the sleep mode, the working state output end of the MCU chip needs to be pulled down in advance by 20mS (because the first control pulse output chip sets the high level pulse output time to be 6-15 mS and 20mS is used for reserving margin), so that the input of the first control pulse output chip has a falling edge (only the falling edge is identified), at the moment, the first control pulse output chip outputs high level, and the first switching element is driven by about 10mS to pull one input of the third diode to be low level.
However, at this time, the SBC power module does not yet enter the sleep state, and the functional safety state output of the SBC power module is a high level. Therefore, the third switching element is driven, the second switching element is also driven to be opened, the output of the second switching element is high level, the input of the second control pulse output chip is high level (only a falling edge is identified), the output of the second control pulse output chip is low level, and the disconnection driving module is completely and normally controlled by the MCU chip.
3. A functional safety failure mode is entered.
When the control device abnormally enters the functional safety failure, the safety state output end of the SBC power supply module can become a low level, and the working state output end of the MCU chip can simultaneously become the low level due to the closing of the SBC power supply module. Therefore, a falling edge (only the falling edge is identified) appears at the input end of the first control pulse output chip, at this time, the first control pulse output chip outputs high level to drive the first switching element by about 10mS, and then the input of the third diode is pulled to low level.
Since the safety state output terminal of the SBC power supply module is also at a low level, the input of the fourth diode is also at a low level, and the third switching element is immediately turned off, so that the second switching element is also turned off to output a low level. Because the former state of the functional safety state of the control device is the normal working mode certainly, the input end of the second control pulse output chip can have a falling edge (only the falling edge is identified) which changes from high to low, so the output of the second control pulse output chip is high-level pulse, the turn-off driving module is subjected to the high-level pulse output by the second control pulse output chip module, and the output of the MCU chip is low level, so the turn-off driving module can not be driven, and the turn-off driving module can be controlled by the second control pulse output chip to drive the output, thereby the switch of the bistable relay is turned off.
4. The control device is powered on
When the control device is powered on again, the second control pulse output chip does not output high-level pulses because the input of the second control pulse output chip is a rising edge (only a falling edge is identified), and the second control pulse output chip does not directly drive OFF at the moment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be 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 terminal 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 terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The technical solutions provided by the present application are introduced in detail, and specific examples are applied in the description to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understanding the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (6)
1. The utility model provides a controlling means of main power return circuit, its characterized in that includes bistable relay, closed relay drive circuit, disconnection relay drive circuit, MCU chip, SBC power module, control pulse output module, first diode, the second diode based on the chip, wherein:
the control pulse output module comprises a first control pulse output chip, a second control pulse output chip and a pulse conversion circuit;
the bistable relay is connected to the main power loop and used for closing the main power loop based on a received closing driving signal or opening the main power loop based on a received opening driving signal;
the input end of the closed relay driving circuit is connected with one control output end of the MCU chip, the output end of the closed relay driving circuit is connected with the signal input end of the bistable relay, and the closed relay driving circuit is used for outputting a closed driving signal to the signal input end of the bistable relay based on a closed control signal output by the control output end;
the input end of the disconnecting relay driving circuit is connected with the other control output end of the MCU chip through the first diode, the output end of the disconnecting relay driving circuit is connected with the other signal input end of the bistable relay, and the disconnecting relay driving circuit is used for outputting a disconnecting driving signal to the other signal input end of the bistable relay based on a disconnecting control signal output by the other control output end;
the SBC power supply module is provided with a first electric output end which supplies power to the MCU chip;
the input end of the first control pulse output chip is connected with the working state output end of the MCU chip, the output end of the first control pulse output chip is connected with the input end of the pulse conversion circuit, the output end of the pulse conversion circuit is connected with the input end of the second control pulse output chip, and the output end of the second control pulse output chip is connected with the input end of the disconnecting relay drive circuit;
the first control pulse output chip responds to a falling edge signal output by the working state output end and converts the falling edge signal into a high-level pulse signal, the pulse conversion circuit receives the high-level pulse signal output by the first control pulse output chip and converts the high-level pulse signal into a falling edge signal for the second control pulse output chip to identify, and the second control pulse output chip responds to the falling edge signal and outputs a disconnection control signal to the bistable relay.
2. The control device of claim 1, wherein the control pulse output module comprises a redundant power supply module electrically connected to the first control pulse output chip, the second control pulse output chip, and the pulse conversion circuit, respectively.
3. The control device of claim 2, wherein the pulse conversion circuit comprises a first resistor, a second resistor, a third resistor, a first switching element, a third switching element, a second switching element, a third diode, and a fourth diode, wherein:
the redundant power supply module is provided with a second electric output end, the second electric output end is respectively and electrically connected with one end of the first resistor, one end of the second resistor and one end of the third switching element, and the other end of the third switching element is connected with the input end of the second control pulse output chip;
an output end of the first control pulse output chip is connected with a control signal input end of the first switching element, and an output end of the first control pulse output chip is configured to output a high-level pulse signal when the working state output end outputs a falling edge signal;
one end of the first switch element is connected with the other end of the first resistor and the control signal input end of the second switch element respectively, the other end of the first switch element is grounded, and one end of the second switch element is connected with the control signal input end of the third switch element and the other end of the second resistor through a third resistor respectively;
an input end of the second control pulse output chip is connected with the other end of the third switching element, an output end of the second control pulse output chip is connected with an input end of the disconnection relay drive circuit through a second diode, and the output end of the second control pulse output chip is configured to output the disconnection control signal when the other end of the third switching element outputs a falling edge signal;
the other end of the first resistor is connected with a control signal input end of the second switch element through a third diode;
the SBC power supply module is provided with a safety state output end, and the safety state output end is connected with a control signal input end of the third switching element through the fourth diode.
4. The control device of claim 2, further comprising a power supply anti-backup circuit, wherein:
and the external power supply is electrically connected with the closed relay drive circuit, the open relay drive circuit, the SBC power supply module and the redundant power supply module through the power supply anti-reverse circuit.
5. The control device of claim 4, further comprising a supply voltage feedback module, wherein:
and the sampling input end of the power supply voltage feedback circuit is connected with the external power supply, and the sampling output end of the power supply voltage feedback circuit is connected with the MCU chip.
6. The control device according to claim 2, wherein the first control pulse output chip and the second control pulse output chip are HEF4538 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121220208.6U CN215284400U (en) | 2021-06-02 | 2021-06-02 | Control device of main power loop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121220208.6U CN215284400U (en) | 2021-06-02 | 2021-06-02 | Control device of main power loop |
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