CN215097119U - Low-voltage power supply intelligent protection system of hydrogen energy automobile - Google Patents

Abstract

The utility model discloses a low voltage power supply intelligence protection system of hydrogen energy car contains low voltage battery, low voltage power supply management relay, emergent starting switch, vehicle electrical system, low pressure power supply wiring harness in this low voltage power supply intelligence protection system. The vehicle electric control system supplies power through different low-voltage power supply management relays; when detecting that the electric quantity of the low-voltage storage battery meets a preset condition, controlling a low-voltage power supply protection relay to be switched off; after the emergency starting switch is pressed down, the low-voltage power supply protection relay is controlled to be closed so that the vehicle can be started normally; and after the vehicle is powered off, a second control system of the vehicle electric control system controls the time-delay power-off relay to be switched off after the vehicle completes the preset function. The intelligent low-voltage power supply protection system can reduce the standing energy consumption of the automobile to the maximum extent, further prolong the standing parking time of the whole automobile, and ensure the vehicle demand and the vehicle safety of a user.

Description

Low-voltage power supply intelligent protection system of hydrogen energy automobile

Technical Field

The utility model relates to a traditional fuel vehicle, pure electric vehicles, all car low voltage power supply system fields such as hydrogen energy fuel cell vehicle specifically are a low voltage power supply intelligent protection system of hydrogen energy car.

Background

At present, the degree of intellectualization and electrification of a vehicle is higher and higher, and more electric devices are still monitoring the state of the whole vehicle during the power-off parking of the vehicle so as to ensure the safety and the use convenience of the whole vehicle. However, the excessive electric appliances are used for working during the parking of the vehicle, so that the parking time of the vehicle can be shortened, the vehicle cannot be restarted next time after being parked for a long time, and certain potential safety hazards can be brought to the whole vehicle. To solve such problems, increasing the capacity of a low-voltage battery, automatically starting an engine to charge the low-voltage battery during parking of a vehicle (conventional fuel vehicles), or automatically starting a high-voltage system to charge the low-voltage battery (new energy vehicles) and the like have been widely used.

The increase of the capacity of the storage battery brings the increase of the volume of the storage battery, and challenges are brought to the arrangement of the storage battery in the whole vehicle; the engine or the high-voltage system is automatically started during the parking period of the vehicle, although the problem of low-voltage storage battery feeding can be solved, the potential safety hazard is increased to a certain extent; particularly, for a hydrogen energy automobile, due to the electrical complexity of a hydrogen energy system, the static power consumption of the automobile is relatively large compared with other types of automobiles, and no matter the automobile adopts any mode, the arrangement problem or the potential safety hazard can be brought, and the patent mainly solves the problem.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a low voltage power supply intelligent protection system and control method of hydrogen energy car through power distribution and corresponding control, avoids low voltage power supply insufficient voltage, prolongs the vehicle parking time that stews, improves the vehicle and stews the safety during period.

In order to solve the problem, the embodiment of the utility model provides a low voltage power supply intelligence protection system of hydrogen energy car, low voltage power supply intelligence protection system contains low-voltage battery, low voltage power supply management relay, emergency starting switch, vehicle electrical system, low pressure power supply pencil. The vehicle electric control system comprises a first control system, a second control system, a third control system and a fourth control system; the low-voltage power supply management relay comprises a low-voltage power supply protection relay, an ignition key ACC position relay, an ignition key ON position relay and a time delay power-off relay; five main positive circuit leads (L0, L1, L2, L3 and L4) and one main negative circuit lead are arranged in the low-voltage power supply wire bundle; the low-voltage storage battery is respectively connected with different low-voltage power supply management relays and positive main loop wires thereof; the vehicle electric control system is respectively connected with different positive main loop leads;

further, the first control system is a vehicle safety monitoring electronic control system which is directly connected with the low-voltage storage battery through the low-voltage power supply wiring harness;

further, the second control system is a power protection control electric control system which is connected with the low-voltage storage battery through the low-voltage power supply wiring harness and the low-voltage power supply protection relay respectively;

further, the third control system is an ignition key switch control electronic control system, and the system is connected with the low-voltage battery through the low-voltage power supply harness, the ignition key ACC position relay or the ignition key ON position relay respectively;

furthermore, the fourth control system is a time-delay power-off electric control system which is connected with the low-voltage storage battery through the low-voltage power supply wiring harness and the time-delay power-off relay respectively, or is directly connected with the low-voltage storage battery through the low-voltage power supply wiring harness;

further, the first control system is connected with the emergency starting switch through a signal acquisition lead;

further, the first control system is connected with the low-voltage power supply protection relay, the ignition key ACC position relay and the ignition key ON position relay through control wires;

furthermore, the second control system is connected with the time-delay power-off relay through a control wire.

Compared with the prior art, the embodiment of the utility model provides a low voltage power supply intelligence protection system of hydrogen energy car has following beneficial effect at least: the embodiment of the utility model provides a relative prior art, through only increasing an emergency starting switch and a ordinary relay (the time delay outage is used), carry out more practical power distribution mode according to its functional requirement with electrical apparatus for the vehicle, and combine relevant automatic control logic, the energy consumption that stews of at utmost reduction car, make whole car get into degree of depth dormant state, the realization is to low voltage power supply's protection, avoid low-voltage battery insufficient voltage, further prolong whole car parking time that stews, improve the security during the parking that the vehicle stews, ensure user with car demand and vehicle safety.

Drawings

Fig. 1 is a schematic structural diagram of a low-voltage power supply intelligent protection system of a hydrogen energy automobile according to embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of a low-voltage power supply intelligent protection system of a hydrogen energy automobile according to embodiment 2 of the present invention;

fig. 3 is a flowchart of a power-on control method for the whole vehicle of the intelligent protection system for the low-voltage power supply of the hydrogen energy vehicle of embodiment 1 of the present invention;

fig. 4 is a flowchart of the entire vehicle power-off control method of the intelligent protection system for the low-voltage power supply of the hydrogen energy vehicle of embodiment 1 of the present invention.

In the figure: 1-a low-voltage storage battery, 2-a first control system, 3-a second control system, 4-an ignition key ACC power supply control system, 5-an ignition key ON power supply control system, 6-a fourth control system, 7-ECU _ C and ECU _ D, 8-ECU _ AC and ECU _ AD, 9-an emergency starting switch.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. In the following description, specific details are provided, such as specific configurations and components, merely to facilitate a thorough understanding of embodiments of the invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

Referring to fig. 1, an embodiment 1 of the present invention provides an intelligent protection system for a low-voltage power supply of a hydrogen energy automobile, which includes a low-voltage battery 1, a low-voltage power management relay, an emergency start switch 9, a vehicle electric control system, and a low-voltage power supply harness. The vehicle electric control system comprises a first control system 2, a second control system 3, third control systems 4 and 5 and a fourth control system 6; the low-voltage power supply management relay comprises a low-voltage power supply protection relay K0, an ignition key ACC position relay K1, an ignition key ON position relay K2 and a time delay power-off relay K3; five positive main circuit leads and one main circuit negative lead are arranged in the low-voltage power supply wiring harness; the low-voltage electric power storage 1 is respectively connected with different low-voltage power supply management relays and positive main loop wires thereof; the vehicle electric control system is respectively connected with different positive main loop leads;

further, the first control system 2 is a vehicle safety monitoring electronic control system, and the system is directly connected with the low-voltage battery 1 through a low-voltage power supply harness L4 and a negative electrode lead. The first control system 2 comprises control units such as an ECU0, an ECU1 and the like, wherein the ECU0 and the ECU1 are in a low power consumption mode when an actual line is not powered off and a vehicle is in a standing period after a whole vehicle ignition key is powered off, and the safety state of the whole vehicle is monitored. The ECU0 and the ECU1 can be a vehicle body control system BCM, a keyless entry starting system PEPS, a vehicle control unit VCU, a hydrogen concentration monitoring control unit, a low-voltage storage battery monitoring unit and the like;

the ECU0 (e.g., BCM or PEPS) is connected to the emergency start switch 9 through a signal acquisition conductor to acquire the state of the emergency start switch 9. Meanwhile, the ECU0 is respectively connected with the low-voltage power supply protection relay K0, the ignition key ACC position relay K1 and the ignition key ON position relay K2 through control wires, and the ON and off of K0, K1 and K2 are respectively controlled through different states of the vehicle;

further, the second control system 3 is a power protection control electric control system, and the system is connected to the low-voltage battery 1 through a low-voltage power supply harness L0, the negative electrode lead, and the low-voltage power supply protection relay K0. The second control system 3 comprises control units such as ECU _ a and ECU _ b, after the ignition key is powered off, the actual line is not powered off for a long time during the vehicle is in a standing period, the ECU _ a and the ECU _ b are in a low power consumption mode, and during the vehicle standing period, when the ECU0 detects that the electric quantity of the low-voltage storage battery 1 meets a first preset value, the ECU0 is controlled to be disconnected, the ECU _ a and the ECU _ b are powered off, and the vehicle is in a lowest power consumption mode at the moment. The ECU _ a and the ECU _ b can be meters, tire pressure monitoring systems, audio-visual entertainment navigation systems, vehicle-mounted monitoring terminals TBOX and the like.

The ECU _ a is connected with the delayed power-off relay K3 through a control wire.

Further, the third control system is an ignition key switch control electronic control system, and the system comprises an ignition key ACC power supply control system 4 and an ignition key ON power supply control system 5. The ignition key ACC power supply control system 4 includes an ECU _ A, ECU _ B and the like, and the ECU _ A, ECU _ B may be a battery management system BMS, a motor controller MCU, an electronic power steering system, a fuel cell control system, a fuel cell high voltage DCDC system and the like. The ignition key ACC power supply control system 5 comprises an ECU _ AA, an ECU _ AB and the like, wherein the ECU _ AA and the ECU _ AB can be an ADAS control system, a gear controller, a low-voltage storage battery charging system DCL, a hydrogen tank control system and the like.

The ECU _ A, ECU _ B is connected to the low-voltage battery 1 through a low-voltage power supply harness L1, the negative electrode lead, and the ignition key ACC position relay K1;

the ECU _ AA and the ECU _ AB are connected with the low-voltage battery 1 through a low-voltage power supply wire bundle L2, the negative electrode lead and the ignition key ON position relay K2;

further, the fourth control system 6 is a time-delay power-off electric control system, and the system is connected with the low-voltage battery 1 through the low-voltage power supply line bundle L3, the time-delay power-off relay K3 and the negative electrode lead respectively; or directly connected to the low-voltage battery 1 through the low-voltage power supply harness L4 and the negative electrode lead, respectively.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a low-voltage power supply intelligent protection system of a hydrogen energy automobile according to embodiment 2 of the present invention, which is different from fig. 1 in that when the whole automobile electrical system is more, a power supply line bundle branch is added to reduce the current of each power supply loop. The third control system is additionally provided with an ECU _ C, ECU _ D7, an ECU _ AC and an ECU _ AD8, wherein the ECU _ C, ECU _ D is connected with the low-voltage storage battery 1 through a newly-added low-voltage power supply branch wiring harness L1a, the negative electrode lead and the ignition key ACC position relay K1; and the ECU _ AC and the ECU _ AD are connected with the low-voltage storage battery 1 through a newly-added low-voltage power supply branch wiring harness L2a, the negative electrode lead and the ignition key ON position relay K2.

Referring to fig. 3, a first power-on control method of the low-voltage power intelligent protection system of the hydrogen energy automobile of the present invention includes the following steps:

step F1, after the ignition key of the vehicle is turned off, the whole vehicle is in a standing state;

step F2, during the vehicle standing period, the ECU0 such as BCM or PEPS enters the dormancy to monitor the non-key position change wake-up event or the non-key starting key action wake-up event in real time;

step F3, if the ECU0 detects that the one-key start switch is pressed down or the mechanical key is screwed, the step F5 is carried out, otherwise, the step F1 is returned to;

step F4, if the ECU0 detects a non-key position change wake-up event or a non-key start key action wake-up event, the whole vehicle is partially awakened, only one control system in the related awakened first control system works, and the step F3 is performed after the execution is finished;

step F5, the ECU1, such as a BCM, PEPS, or low-voltage battery monitoring unit, detects the state of charge of the low-voltage battery in real time;

step F6, if the low-voltage storage battery electric quantity is less than S1, the step F7 is carried out;

step F7, the low-voltage storage battery is in an over-discharge state, the vehicle can be started only when the low-voltage storage battery needs to be replaced and the low-voltage storage battery is charged or lapped, and if no treatment is carried out, the step F1 is returned;

step F8, if the electric quantity of the low-voltage storage battery meets a first preset value, wherein the first preset value is that the electric quantity of the low-voltage storage battery is more than S1 and less than S2, the instrument gives an alarm that the electric quantity of the low-voltage storage battery is low, and prompts a driver to press an emergency starting switch and quickly restart an ignition key through voice/characters so as to prompt the driver to perform emergency starting operation of the vehicle;

step F9, the ECU0 judges whether the emergency starting switch is pressed or not, such as BCM and PEPS;

step F10, if the low-voltage storage battery electric quantity is more than S1 and less than S2 and the emergency starting switch is not pressed, the vehicle keeps the current state unchanged;

step F11, if the low-voltage storage battery electric quantity is smaller than S2 in the condition of S1 and the emergency starting switch is pressed, the ECU0 controls the K0 relay to be closed to supply power to the ECU _ a and the ECU _ b, and timing t _ E is carried out at the same time;

step F12, after the ECU0 judges that the emergency starting switch is pressed down, whether the driver completes the ignition key restart power-on request within the time that t _ E is less than t _ limit;

step F13, if the driver does not have the ignition key to restart the power-on request within the time that t _ E is less than t _ limit, the ECU0 controls the K0 relay to be disconnected, the ECU _ a and the ECU _ b are powered off, and after the execution is finished, the step F5 is returned;

in step F14, the ECU0 determines whether the ignition KEY position information is from KEY _ OFF to KEY _ ON;

step F15, if the ignition KEY position is changed from KEY _ OFF to KEY _ ON rapidly, the ECU0 completes the actions from KEY _ OFF to KEY _ ACC and from KEY _ ACC to KEY _ ON in sequence;

in step F16, the ECU0 determines whether the ignition KEY position information is from KEY _ OFF to KEY _ ACC;

step F17, if the ignition KEY position is from KEY _ OFF to KEY _ ACC, the ECU0 controls the K1 relay to be closed to supply power to the ECU _ A, ECU _ B;

step F18, ECU _ A, ECU _ B is powered on to work;

and step F19, the KEY _ ACC wakes up the ECU _ a, the ECU _ b and the ECU _ ba, and the ECU _ a, the ECU _ b and the ECU _ ba work at the moment. If the ECU1 is not awakened before F19, in this step, the ECU1 (such as a vehicle control unit VCU, a hydrogen concentration monitoring control unit, etc.) is awakened to operate;

step F20, after step F19 is finished, whether the ECU _ a is initialized or not is finished;

step F21, the ECU _ a controls the relay K3 to be closed to supply power to the ECU _ aa;

step F22, electrifying the ECU _ aa;

in step F23, the ECU0 determines whether the ignition KEY position information is from KEY _ ACC to KEY _ ON;

step F24, if the ignition KEY stays at the KEY _ ACC position, the vehicle maintains the current state;

step F25, the ignition KEY position information is changed from KEY _ ACC to KEY _ ON, the ECU0 controls the K2 relay to be closed, and power is supplied to the ECU _ AA and the ECU _ AB;

step F26, starting the ECU _ AA and the ECU _ AB to work;

and F27, completing low-voltage electrification of all electric systems of the whole vehicle.

Referring to fig. 4, the first embodiment of the present invention provides a power supply control method for a low-voltage power supply intelligent protection system of a hydrogen energy automobile, which includes the following steps:

step F60, the driver operates and requests the vehicle to power off;

in step F61, the ECU0 determines whether the ignition KEY is turned from KEY _ ON to KEY _ OFF;

step F62, if the ignition KEY position is changed from KEY _ ON to KEY _ OFF quickly, the ECU0 completes the actions from KEY _ ON to KEY _ ACC and from KEY _ ACC to KEY _ OFF in sequence;

in step F63, the ECU0 determines whether the ignition KEY is from KEY _ ON to KEY _ ACC;

step F64, if the ignition key has no action, the vehicle maintains the current state;

step F65, if the ignition KEY is switched from KEY _ ON to KEY _ ACC, the ECU0 controls the K2 relay to be disconnected, so that the ECU _ AA and the ECU _ AB are powered off;

in step F66, the ECU0 determines whether the ignition KEY is from KEY _ ACC to KEY _ OFF;

step F67, if the ignition KEY is kept unchanged at the KEY _ ACC position, the vehicle maintains the current state;

step F68, if the ignition KEY is turned from KEY _ ACC to KEY _ OFF, the ECU0 controls the K1 relay to be disconnected, so that the ECU _ A, ECU _ B is powered OFF;

step F69, if the ignition KEY is switched from KEY _ ACC to KEY _ OFF, synchronizing the ECU _ aa and the ECU _ ba to finish the relevant data storage work before power failure;

step F70, after the step F69 is completed, the ECU _ a controls the relay K3 to be disconnected, so that the ECU _ aa is powered off;

step F71, after the step F69 is completed, the ECU _ ba synchronously cuts off the internal power supply of the ECU _ ba, so that the ECU _ ba is powered off from the inside;

step F72, the ECU0, the ECU1, the ECU _ a and the ECU _ b judge whether a sleep bar is provided according to the network management state;

step F73, if the whole vehicle does not have the sleep condition, the ECU0, the ECU1, the ECU _ a and the ECU _ b wait for the state of each network management NM until the sleep condition is met;

step F74, if the whole vehicle has the sleep condition, the ECU0, the ECU1, the ECU _ a and the ECU _ b enter a low power consumption mode; step F75, during the vehicle standing and sleeping period, the ECU1 judges the electric quantity state of the low-voltage storage battery, if the electric quantity of the low-voltage storage battery does not meet the first preset value, the step F74 is returned;

step F76, if the low-voltage battery electric quantity meets a first preset value, namely S1 < low-voltage battery electric quantity < S2, the ECU1 wakes up the ECU0, for example, the low-voltage battery monitoring unit wakes up the PEPS through the CAN;

step F77, the ECU0 controls the K0 relay to be disconnected, and the ECU _ a and the ECU _ b are powered off;

in step F78, the vehicle only has the first control system ECU0 and the ECU1 in the low power consumption sleep mode, at this time, the vehicle enters the deep sleep state, and the power consumption of the whole vehicle during the standing period reaches the lowest.

To sum up, the utility model discloses only increase an emergency starting switch and a ordinary relay (time delay outage usefulness) in the current part of vehicle, carry out more practical power distribution mode according to its functional requirement through electrical apparatus for the vehicle, and combine relevant automatic control logic, the energy consumption of stewing of at utmost reduction car, make whole car get into degree of depth dormant state, realize the protection to low voltage power, avoid low-voltage battery insufficient voltage, further prolong whole car parking time of stewing, improve the security of vehicle during the parking of stewing, ensure user's vehicle demand and vehicle safety.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

In this document, relationships or terms, such as name number, first, etc., are 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.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. The utility model provides a low pressure power intelligent protection system of hydrogen energy car which characterized in that: the emergency starting device comprises a low-voltage storage battery, a low-voltage power supply management relay, an emergency starting switch, a vehicle electric control system and a low-voltage power supply wiring harness; the vehicle electric control system comprises a first control system, a second control system, a third control system and a fourth control system; the low-voltage power supply management relay comprises a low-voltage power supply protection relay, an ignition key ACC position relay, an ignition key ON position relay and a time delay power-off relay; five positive main circuit leads and one main circuit negative lead are arranged in the low-voltage power supply wiring harness; the low-voltage storage battery is respectively connected with different low-voltage power supply management relays and positive main loop wires thereof; and the vehicle electric control system is respectively connected with different positive main loop leads.

2. The intelligent protection system for the low-voltage power supply of the hydrogen energy automobile according to claim 1, characterized in that: the first control system is a vehicle safety monitoring electric control system which is directly connected with the low-voltage storage battery through the low-voltage power supply wiring harness.

3. The intelligent protection system for the low-voltage power supply of the hydrogen energy automobile according to claim 1, characterized in that: the second control system is a power supply protection control electric control system which is connected with the low-voltage storage battery through the low-voltage power supply wire bundle and the low-voltage power supply protection relay respectively.

4. The intelligent protection system for the low-voltage power supply of the hydrogen energy automobile according to claim 1, characterized in that: and the third control system is an ignition key switch control electric control system which is respectively connected with the low-voltage storage battery through the low-voltage power supply wire harness, the ignition key ACC position relay or the ignition key ON position relay.

5. The intelligent protection system for the low-voltage power supply of the hydrogen energy automobile according to claim 1, characterized in that: the fourth control system is a time-delay power-off electric control system which is respectively connected with the low-voltage storage battery through the low-voltage power supply wire bundle and the time-delay power-off relay or directly connected with the low-voltage storage battery through the low-voltage power supply wire bundle.

6. The intelligent protection system for the low-voltage power supply of the hydrogen energy automobile according to claim 2, characterized in that: the first control system is connected with the emergency starting switch through a signal acquisition conducting wire.

7. The intelligent protection system for the low-voltage power supply of the hydrogen energy automobile according to claim 2, characterized in that: the first control system is connected with the low-voltage power supply protection relay, the ignition key ACC position relay and the ignition key ON position relay through control wires.

8. The intelligent protection system for the low-voltage power supply of the hydrogen energy automobile according to claim 3, characterized in that: and the second control system is connected with the time-delay power-off relay through a control wire.

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