CN220298302U

CN220298302U - Control circuit for delayed power-down of hydrogen fuel vehicle

Info

Publication number: CN220298302U
Application number: CN202322044271.4U
Authority: CN
Inventors: 安严
Original assignee: Hunan Xingbida Netlink Technology Co Ltd
Current assignee: Hunan Xingbida Netlink Technology Co Ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-01-05
Anticipated expiration: 2033-07-31

Abstract

The utility model provides a control circuit for delayed power-down of a hydrogen fuel vehicle, which relates to the technical field of vehicle control circuits and comprises a storage battery circuit, a first delay power-down control circuit, a second delay power-down control circuit, a whole vehicle control circuit, a power supply control circuit, an all-in-one power supply circuit for supplying power to a whole vehicle system and a control signal input circuit, wherein one end of the storage battery circuit is respectively connected with one ends of the first delay power-down control circuit and the second delay power-down control circuit, the other end of the first delay power-down control circuit is connected with the whole vehicle control circuit, the other end of the second delay power-down control circuit is respectively connected with the whole vehicle control circuit, the power supply control circuit and the control signal input circuit, and the power supply control circuit is also respectively connected with two ends of the storage battery circuit and the all-in-one power supply circuit. The utility model has simple structure, is not easy to cause the power shortage of the storage battery, and ensures the service lives of the hydrogen fuel cell and the whole vehicle.

Description

Control circuit for delayed power-down of hydrogen fuel vehicle

Technical Field

The utility model relates to the technical field of automobile control circuits, in particular to a control circuit for delayed power-down of a hydrogen fuel automobile.

Background

The fuel cell is a device for directly converting chemical energy of fuel into electric energy, has the advantages of high energy conversion efficiency, cleanness, environmental protection and the like, and the hydrogen fuel cell is a device for generating electric energy by hydrogen and oxygen in chemical reaction, utilizes the reaction between the hydrogen and the oxygen to generate electric power, has the characteristics of no pollution and high efficiency, is a renewable energy technology with huge potential, and has become an important direction for the development of new energy automobiles due to the characteristics of zero pollution, long endurance mileage and short hydrogenation time.

The hydrogen fuel cell of the hydrogen fuel vehicle can generate water in the operation process, residual moisture can be inevitably generated when the operation is stopped, and if the residual moisture is not removed in time, irreversible damage can be caused to a proton exchange membrane, a catalyst and the like of the fuel cell, so the residual moisture is required to be purged completely when the operation of the hydrogen fuel cell is stopped, the internal humidity of the hydrogen fuel cell is reduced, and a stable and good environment is maintained for the secondary operation of the cell. At present, the purging method of the hydrogen fuel cell mainly comprises the steps of executing purging work before power-down, finishing the power-down after the purging work is finished, on the one hand, for the hydrogen fuel vehicle, usually providing auxiliary storage batteries for auxiliary systems for supplying power to the vehicle, such as lighting, entertainment equipment and the like, and after the purging work, if a vehicle switch is closed or the vehicle is not started in time, the auxiliary storage batteries may be deficient in power after a period of time; on the other hand, if the power is directly cut off, the whole car is directly powered down, and the damage to the hydrogen fuel cell of the hydrogen fuel car is caused, so that the service lives of the hydrogen fuel cell and the whole car are influenced.

The prior art discloses a power-down control system of a fuel cell vehicle, which comprises a VCU, FCU, PDU unit, a power cell, a pile power supply unit, a step-down DC/DC unit, a high-voltage load, a low-voltage load, a whole vehicle low-voltage accumulator jar and a delay relay, wherein the power output end of the whole vehicle low-voltage accumulator jar is connected with the wake-up signal input ends of an FCU and a BMS through the delay relay, the delay power-down signal output end of the VCU is connected with the control end of the delay relay, the power output end of the power cell is connected with the power input end of the step-down DC/DC unit, and is connected with the power input end of the high-voltage load through the high-voltage load relay, the power output end of the step-down DC/DC unit is connected with the power input end of the low-voltage load, and the control end of the VCU is connected with the step-up DC/DC relay, the high-voltage load relay and the control end of the main negative relay, but the power-down control system has complex circuit structure, the power-down control process is complicated, the vehicle cannot be started in time after being closed, and the vehicle battery is caused to be power-down.

Disclosure of Invention

In order to solve the problems that the current power-down control system of the fuel cell vehicle has a complex circuit structure and the storage battery is easy to be deficient, the utility model provides a control circuit for the delayed power down of the hydrogen fuel cell vehicle, which has a simple structure, is not easy to cause the power deficiency of the storage battery and ensures the service lives of the hydrogen fuel cell and the whole vehicle.

In order to achieve the technical effects, the technical scheme of the utility model is as follows:

the utility model provides a control circuit of hydrogen fuel car time delay power down, includes battery circuit, first delay power down control circuit, second delay power down control circuit, whole car control circuit, power supply control circuit, is used for the power supply of whole car system's all-in-one power supply circuit and control signal input circuit, the one end of battery circuit is connected first delay power down control circuit and second delay power down control circuit's one end respectively, and whole car control circuit is connected to first delay power down control circuit's the other end, and whole car control circuit, power supply control circuit and control signal input circuit are connected respectively to second delay power down control circuit's the other end, power supply control circuit still is connected battery circuit's both ends and all-in-one power supply circuit respectively.

In the technical scheme, the first delay power-down control circuit, the second delay power-down control circuit and the whole vehicle control circuit are adopted to realize the control of the delayed power down of the hydrogen fuel vehicle, wake-up of the hydrogen fuel system and the delayed power-down of the power supply source are realized, so that the hydrogen fuel vehicle has time to realize the power down process, and the control circuit has a simple structure, can be started in time after the whole vehicle is closed on one hand, and can effectively prevent the direct power down of the hydrogen fuel cell on the other hand, so that the damage to the hydrogen fuel cell caused by the direct power down of the whole vehicle is avoided.

Preferably, the first delay power-down control circuit is provided with a first relay, one end of a control coil of the first relay is connected with a storage battery circuit, the other end of the control coil of the first relay is connected with a whole vehicle control circuit, and the storage battery circuit is connected with a fuel system wake-up power supply through a normally open contact of the first relay.

Preferably, the second delay power-down control circuit is provided with a second relay, one end of a control coil of the second relay and one end of a control coil of the first relay are connected with a storage battery circuit together, the other end of the control coil of the second relay is connected with a whole vehicle control circuit, and the storage battery circuit is connected with a power supply control circuit and a control signal input circuit respectively through normally open contacts of the second relay.

Preferably, the whole vehicle control circuit comprises a whole vehicle controller and a DCDC high-voltage module, a first pin1 of the whole vehicle controller is connected with one end of a control coil of the first relay, a second pin2 of the whole vehicle controller is connected with one end of a control coil of the second relay, and a signal connection end of the whole vehicle controller is connected with the DCDC high-voltage module.

Preferably, the power supply control circuit is provided with an electromagnetic main switch, one end of a control coil of the electromagnetic main switch is respectively connected with the control signal input circuit and a normally open contact of the second relay, the other end of the control coil of the electromagnetic main switch is connected with the storage battery circuit, and the storage battery circuit is connected with the all-in-one power supply circuit through the normally open contact of the electromagnetic main switch.

Preferably, the all-in-one power supply circuit comprises a fuel system power supply, a hydrogen system power supply and a whole vehicle power supply, and the fuel system power supply, the hydrogen system power supply and the whole vehicle power supply are connected in parallel and then are jointly connected with a normally open contact of the electromagnetic main switch.

Preferably, the control signal input circuit comprises an off switch and a freewheel diode, wherein the input end of the off switch is connected with the anode of the freewheel diode, and the cathode of the freewheel diode is respectively connected with the normally open contact of the second relay and one end of the control coil of the electromagnetic main switch.

Preferably, the OFF switch is a key switch provided with a closed OFF gear and an open ON gear.

Preferably, when the key switch is in an ON gear state, the hydrogen fuel vehicle is in an operating state; when the key switch is in the OFF gear state, the hydrogen fuel vehicle starts to be powered down.

Preferably, the storage battery circuit comprises a plurality of storage batteries connected in series, and the storage battery circuit is respectively connected with one ends of the first delay power-off control circuit and the second delay power-off control circuit through safety elements.

Firstly, a safety element breaks a circuit according to the current magnitude and time characteristics so as to prevent the current flowing into a first delay power-down control circuit and a second delay power-down control circuit from exceeding a set value and prevent the control circuit from being damaged or causing fire caused by overload; then when the whole control circuit has short-circuit fault, the safety element can rapidly disconnect the circuit so as to avoid overload of the circuit and protect the whole control circuit from damage of the short-circuit fault; further, if the safety element is disconnected, it is possible to determine whether the fault is caused by overload, short circuit or other reasons by checking the disconnected safety element, so that the fault checking and repairing of the control circuit can be conveniently performed.

Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:

the utility model provides a control circuit for delayed power down of a hydrogen fuel vehicle, which solves the problems of complex circuit structure and easy power shortage of a storage battery in the current power down control system of the fuel cell vehicle.

Drawings

FIG. 1 is a schematic diagram showing the control principle of a control circuit for delayed power down of a hydrogen fuel vehicle according to the present utility model;

FIG. 2 is a schematic diagram showing the structural connection of a control circuit for the delayed power down of a hydrogen fuel vehicle according to the present utility model;

FIG. 3 is a flow chart showing operation of a control circuit for delayed power down of a hydrogen fuelled vehicle in accordance with the present utility model;

1. a battery circuit; 2. a first delay power-down control circuit; 21. a first relay; 22. the fuel system wakes up the power supply; 3. a second delay power-down control circuit; 31. a second relay; 4. the whole vehicle control circuit; 41. a vehicle controller; a dcdc high voltage module; 5. a power supply control circuit; 51. an electromagnetic main switch; 6. an all-in-one power supply circuit; 61. a fuel system power source; 62. a hydrogen system power supply; 63. a whole vehicle power supply; 7. a control signal input circuit; 71. an off-switch; 72. a freewheeling diode.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;

for better illustrating the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent actual dimensions, and the description of the directions of the parts such as "up" and "down" is not limiting of the present patent;

it will be appreciated by those skilled in the art that some well known descriptions in the figures may be omitted;

the positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent;

the technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1, this embodiment proposes a control circuit for delayed power-down of a hydrogen-fueled vehicle, including a storage battery circuit 1, a first delay power-down control circuit 2, a second delay power-down control circuit 3, a vehicle control circuit 4, a power control circuit 5, an all-in-one power supply circuit 6 for supplying power to a vehicle system, and a control signal input circuit 7, one end of the storage battery circuit 1 is respectively connected with one ends of the first delay power-down control circuit 2 and the second delay power-down control circuit 3, the other end of the first delay power-down control circuit 2 is connected with the vehicle control circuit, the other end of the second delay power-down control circuit is respectively connected with the vehicle control circuit 4, the power control circuit 5, and the control signal input circuit 7, and the power control circuit 5 is also respectively connected with two ends of the storage battery circuit 1 and the all-in-one power supply circuit 6.

Referring to fig. 1 and 2, the storage battery circuit 1 includes a plurality of series-connected storage batteries, the storage battery circuit 1 is respectively connected with one ends of the first delay power-down control circuit 2 and the second delay power-down control circuit 3 through a safety element, when the current flowing through the safety element is too large, the safety element firstly breaks the circuit according to the current magnitude and the time characteristic, so as to prevent the current flowing into the first delay power-down control circuit 2 and the second delay power-down control circuit 3 from exceeding a set value, and prevent the control circuit from being damaged or causing fire caused by overload; then when the whole control circuit has short-circuit fault, the safety element can rapidly disconnect the circuit so as to avoid overload of the circuit and protect the whole control circuit from damage of the short-circuit fault; further, if the safety element is disconnected, it is possible to determine whether the fault is caused by overload, short circuit or other reasons by checking the disconnected safety element, so that the fault checking and repairing of the control circuit can be conveniently performed.

The working principle of the control circuit is as follows: the hydrogen fuel vehicle needs to perform purging before power down, and the purging is required to be completed and then the power down is completed, however, the process may cause the power shortage of the storage battery, which is caused by the power shortage: when the whole vehicle is in a closed state, the hydrogen fuel cell system of the vehicle has a purging requirement, the DCDC high voltage of the whole vehicle is powered off in the closed state, the storage battery independently supplies power to the hydrogen fuel cell system, the power consumption is different after different hydrogen fuel cell manufacturers are dormant, and the dormant power consumption is larger, so that when the hydrogen fuel vehicle is powered off, the control signal input circuit 7 inputs a power-off signal to the whole vehicle control circuit 4, the whole vehicle control circuit 4 does not power-off the DCDC high voltage before receiving the power-off signal request, the DCDC high voltage refers to a voltage with higher output voltage in the DC-DC converter of the vehicle, and when the hydrogen fuel cell system of the vehicle completes the purging operation, the hydrogen fuel vehicle starts to power-off, the whole vehicle control circuit 4 controls the DCDC high voltage and gives a power-off instruction: the first delay power-down control circuit 2 is disconnected, the second delay power-down control circuit 3 is disconnected after waiting for 3 seconds, the power supply control circuit 5 is disconnected again, and the connection between the all-in-one power supply circuit 6 and the power supply control circuit 5 is cut off, so that the all-in-one power supply circuit 6 is powered off, and the power supply for the hydrogen fuel cell system of the whole vehicle cannot be continued. It should be noted that, in the actual application of the control circuit, the control process of the whole set of control circuit involves signal transmission and processing, but only serves as an understanding of the working principle of the control circuit of the present embodiment.

In the embodiment, the first delay power-down control circuit, the second delay power-down control circuit and the whole vehicle control circuit are adopted to realize the control of delayed power-down of the hydrogen fuel vehicle, the wake-up of the hydrogen fuel cell system of the vehicle and the delayed power-off of the power supply source are realized, more hydrogen fuel cell systems can be compatible, the leakage current of the hydrogen fuel cell system is not forced, and the power shortage risk of the storage battery is avoided, because the control circuit of the embodiment does not need to require the dormancy power consumption of a hydrogen fuel cell manufacturer any more, the power-down is realized after the purging is finished, and the dark current is 0 according to the design of the control circuit of the embodiment, so the leakage current of the forced hydrogen fuel cell system is not needed; the control of the delayed power down enables the hydrogen fuel vehicle to realize the power down process in time, and the control circuit has a simple structure, on one hand, the control circuit can be started in time after the whole vehicle is closed, on the other hand, the direct power failure of the hydrogen fuel cell is effectively prevented, the damage to the hydrogen fuel cell caused by the direct power down of the whole vehicle is avoided, the leakage current of the hydrogen fuel system is not forced, the structure is simple, the battery is not easy to cause power shortage, and the service lives of the hydrogen fuel cell and the whole vehicle are ensured.

Example 2

Referring to fig. 1 and 2, the first delay power-down control circuit 2 is provided with a first relay 21, one end of a control coil of the first relay 21 is connected with the storage battery circuit 1, the other end of the control coil of the first relay 21 is connected with the whole vehicle control circuit 4, and the storage battery circuit 1 is connected with a fuel system wake-up power supply 22 through a normally open contact of the first relay 21.

The second delay power-down control circuit 3 is provided with a second relay 31, one end of a control coil of the second relay 31 and one end of a control coil of the first relay 21 are connected with the storage battery circuit 1 together, the other end of the control coil of the second relay 31 is connected with the whole vehicle control circuit 4, and the storage battery circuit 1 is connected with the power supply control circuit 5 and the control signal input circuit 7 respectively through normally open contacts of the second relay 31.

The whole vehicle control circuit 4 comprises a whole vehicle controller 41 and a DCDC high-voltage module 42, a first pin1 of the whole vehicle controller 41 is connected with one end of a control coil of the first relay 21, a second pin2 of the whole vehicle controller 41 is connected with one end of a control coil of the second relay 31, and a signal connection end of the whole vehicle controller 41 is connected with the DCDC high-voltage module 42.

In this embodiment, when the hydrogen fuel vehicle is powered down, the control signal input circuit 7 inputs a power-down signal to the whole vehicle control circuit 4, the whole vehicle controller 41 does not pass through the DCDC high voltage under the DCDC high voltage module before receiving the power-down signal request, when the hydrogen fuel vehicle finishes the purging operation, the whole vehicle controller 41 starts to power down, controls the DCDC high voltage under the DCDC high voltage module, and issues a power-down instruction to the first relay 21 and the second relay 31 to disconnect the first relay 21, at this time, the fuel system wake-up power supply 22 cannot supply power to the control circuit, the fuel system wake-up power supply 22 is disconnected, and after waiting for 3 seconds, the second relay 31 is disconnected, thereby realizing the control of the hydrogen fuel vehicle power-down in a time delay. It should be noted that, in the actual application of the control circuit, the control process of the whole set of control circuit involves signal transmission and processing, but only serves as an understanding of the working principle of the control circuit of the present embodiment.

Example 3

Referring to fig. 1 and 2, the power control circuit 5 is provided with an electromagnetic main switch 51, one end of a control coil of the electromagnetic main switch 51 is respectively connected with a control signal input circuit 7 and a normally open contact of the second relay 31, the other end of the control coil of the electromagnetic main switch 51 is connected with a storage battery circuit 1, and the storage battery circuit 1 is connected with an all-in-one power circuit 6 through the normally open contact of the electromagnetic main switch 51;

the integrated power circuit 6 includes a fuel system power source 61, a hydrogen system power source 62 and a whole vehicle power source 63, wherein the whole vehicle power source adopts 30+ electricity, and the 30+ electricity refers to a specific power line in a battery system of the hydrogen fuel vehicle, and is commonly called as a 30+ circuit, and the circuit is commonly used for providing important vehicle functions or systems, such as an engine control module, a sensor, a starting circuit, a lighting system and the like; the fuel system power supply 61, the hydrogen system power supply 62 and the whole vehicle power supply 63 are connected in parallel and then are commonly connected with a normally open contact of the electromagnetic main switch 51; the control signal input circuit 7 comprises an off switch 71 and a freewheel diode 72, wherein the input end of the off switch 71 is connected with the anode of the freewheel diode 72, and the cathode of the freewheel diode 72 is respectively connected with the normally open contact of the second relay 31 and one end of the control coil of the electromagnetic main switch 51; the OFF switch 71 is a key switch provided with a closing OFF gear and an opening ON gear; when the key switch is in an ON gear opening state, the hydrogen fuel vehicle is in a running state; when the key switch is in the OFF gear state, the hydrogen fuel vehicle starts to be powered down.

In this embodiment, referring to fig. 2 and 3, when the key switch is in the ON state, the hydrogen fuel vehicle is in an operating state, and at this time, the vehicle controller 41 controls the first relay 21, the second relay 31 and the electromagnetic main switch 51 to be in a closed state, i.e. an open state, and the control circuit normally works to supply power to the hydrogen fuel cell system of the vehicle; when the key switch is in the OFF gear state, the hydrogen fuel vehicle starts to be powered down, the whole vehicle controller 41 controls the DCDC high voltage under the DCDC high voltage module to send a power down instruction to the first relay 21, the second relay 31 and the electromagnetic main switch 51 to disconnect the first relay 21, at the moment, the fuel system wake-up power supply 22 cannot supply power to the control circuit, the fuel system wake-up power supply 22 is powered OFF, after waiting for 3 seconds, the second relay 31 is disconnected, the electromagnetic main switch 51 is disconnected, at the moment, the fuel system power supply 61, the hydrogen system power supply 62 and the whole vehicle power supply 63 are all powered OFF, and the whole vehicle cannot be continuously powered. It should be noted that, in the actual application of the control circuit, the control process of the whole set of control circuit involves signal transmission and processing, but only serves as an understanding of the working principle of the control circuit of the present embodiment.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and are not intended to limit the scope of the utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The utility model provides a control circuit of hydrogen fuel car time delay electricity down, its characterized in that includes, battery circuit (1), first delay electricity down control circuit (2), second delay electricity down control circuit (3), whole car control circuit (4), power control circuit (5), be used for the power supply of whole car system all in one power supply circuit (6) and control signal input circuit (7), the one end of battery circuit (1) is connected first delay electricity down control circuit (2) and the one end of second delay electricity down control circuit (3) respectively, and whole car control circuit is connected to the other end of first delay electricity down control circuit (2), and whole car control circuit (4), power control circuit (5) and control signal input circuit (7) are connected respectively to the other end of second delay electricity down control circuit (3), both ends and all in one power supply circuit (6) of battery circuit (1) are still connected respectively to power control circuit (5).

2. The control circuit for the delayed power down of the hydrogen fuel vehicle according to claim 1, wherein the first delayed power down control circuit (2) is provided with a first relay (21), one end of a control coil of the first relay (21) is connected with a storage battery circuit (1), the other end of the control coil of the first relay (21) is connected with a whole vehicle control circuit (4), and the storage battery circuit (1) is connected with a fuel system wake-up power supply (22) through a normally open contact of the first relay (21).

3. The control circuit for the delayed power down of the hydrogen fuel vehicle according to claim 2, wherein the second delayed power down control circuit (3) is provided with a second relay (31), one end of a control coil of the second relay (31) and one end of a control coil of the first relay (21) are commonly connected with the storage battery circuit (1), the other end of the control coil of the second relay (31) is connected with the whole vehicle control circuit (4), and the storage battery circuit (1) is respectively connected with the power supply control circuit (5) and the control signal input circuit (7) through normally open contacts of the second relay (31).

4. A control circuit for delayed power down of a hydrogen fuelled vehicle as claimed in claim 3 wherein said vehicle control circuit (4) comprises a vehicle controller (41) and a DCDC high voltage module (42), a first pin1 of the vehicle controller (41) being connected to one end of a control coil of the first relay (21), a second pin2 of the vehicle controller (41) being connected to one end of a control coil of the second relay (31), a signal connection end of the vehicle controller (41) being connected to said DCDC high voltage module (42).

5. The control circuit for the delayed power down of the hydrogen fuel vehicle according to claim 4, wherein the power supply control circuit (5) is provided with an electromagnetic main switch (51), one end of a control coil of the electromagnetic main switch (51) is respectively connected with the control signal input circuit (7) and a normally open contact of the second relay (31), the other end of the control coil of the electromagnetic main switch (51) is connected with the storage battery circuit (1), and the storage battery circuit (1) is connected with the all-in-one power supply circuit (6) through the normally open contact of the electromagnetic main switch (51).

6. The control circuit for delayed power down of a hydrogen fuelled vehicle as claimed in claim 5 wherein said all-in-one power supply circuit (6) comprises a fuel system power supply (61), a hydrogen system power supply (62) and a whole vehicle power supply (63), said fuel system power supply (61), hydrogen system power supply (62) and whole vehicle power supply (63) being connected in parallel and then commonly connected to a normally open contact of said electromagnetic main switch (51).

7. The control circuit for the delayed power down of a hydrogen-fueled vehicle according to claim 6, wherein the control signal input circuit (7) includes an off switch (71) and a freewheel diode (72), an input terminal of the off switch (71) is connected to an anode of the freewheel diode (72), and a cathode of the freewheel diode (72) is connected to a normally open contact of the second relay (31) and one end of a control coil of the electromagnetic main switch (51), respectively.

8. The control circuit for the delayed power down of a hydrogen fuelled vehicle as claimed in claim 7 wherein said OFF switch (71) is a key switch provided with an OFF-gear and an ON-gear.

9. The control circuit for delayed powering down of a hydrogen fuelled vehicle as claimed in claim 8 wherein the hydrogen fuelled vehicle is in operation when the key switch is in the ON state; when the key switch is in the OFF gear state, the hydrogen fuel vehicle starts to be powered down.

10. The control circuit for delayed power down of a hydrogen fuelled vehicle as claimed in any one of claims 1 to 9 wherein the battery circuit (1) comprises a plurality of series-connected batteries, the battery circuit (1) being connected to one end of the first delayed power down control circuit (2) and one end of the second delayed power down control circuit (3) respectively through a safety element.