CN119636422A - A new energy heavy truck safe power-off system and method - Google Patents
A new energy heavy truck safe power-off system and method Download PDFInfo
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- CN119636422A CN119636422A CN202510136333.5A CN202510136333A CN119636422A CN 119636422 A CN119636422 A CN 119636422A CN 202510136333 A CN202510136333 A CN 202510136333A CN 119636422 A CN119636422 A CN 119636422A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本发明提供一种新能源重卡安全下电系统及方法，通过在手动开关处并联一个下电延时继电器，实现在车辆高压状态时不断钥匙电直接断开手动开关，整车控制器的唤醒电依旧可以保持，直至整车控制器判断此时可以断开唤醒电，进而整车控制器休眠；在此同时，从手动开关处引出自身状态，通过继电器控制整车控制器的钥匙ON档唤醒电回路的通断，在钥匙开关处于ON档时断开手动开关，此时整车控制器的ON档信号也会消失，整车控制器开始执行下高压流程；本发明提出的整车控制器下高压流程具体分为正常高压状态下断开手动开关、智能补电激活时断开手动开关和插枪充电时断开手动开关。
The present invention provides a new energy heavy-duty truck safe power-off system and method, by connecting a power-off delay relay in parallel at the manual switch, the manual switch can be directly disconnected without interrupting the key power when the vehicle is in a high-voltage state, and the wake-up power of the whole vehicle controller can still be maintained until the whole vehicle controller determines that the wake-up power can be disconnected at this time, and then the whole vehicle controller is put into sleep; at the same time, the manual switch is derived from its own state, and the on-off of the key ON gear wake-up power circuit of the whole vehicle controller is controlled by the relay, and the manual switch is disconnected when the key switch is in the ON gear. At this time, the ON gear signal of the whole vehicle controller will also disappear, and the whole vehicle controller starts to execute the high-voltage process; the high-voltage process of the whole vehicle controller proposed by the present invention is specifically divided into disconnecting the manual switch under normal high-voltage state, disconnecting the manual switch when the intelligent power supplement is activated, and disconnecting the manual switch when the gun is plugged in for charging.
Description
Technical Field
The invention relates to a new energy heavy-duty card safe power-down system and a method, belonging to the technical field of new energy heavy-duty card power management.
Background
With the popularization of new energy commercial vehicles and the year-by-year increase of market share, the situation that a manual switch is disconnected when a vehicle is at high pressure can not be avoided, and then damage to a rear end load is caused. The existing main current power-down mode is lack of protection of safe power-down of the manual switch, and the load throwing operation of directly disconnecting the manual switch is inevitably existed in the terminal market in the actual use process, so that the rear-end high-voltage load is further caused to generate instantaneous heavy current to reversely break down the front-end relay or insurance at the moment of losing input, and the high-voltage components of the vehicle are damaged.
Disclosure of Invention
The invention aims to provide a new energy heavy truck safe power-down system and a method, which are characterized in that a power-down time delay relay is connected in parallel at a manual switch, so that the manual switch is directly disconnected continuously by key switch power in a high-voltage state of a vehicle, the wake-up power of a VCU controller can still be kept, the whole vehicle can safely finish unloading operation, a power-down high-voltage process is executed according to a set program, and the power-down high-voltage operation can be finished within a set time.
In order to achieve the above purpose/solve the above technical problems, the present invention is realized by adopting the following technical scheme.
The invention provides a new energy heavy truck safe power-down system, which comprises a storage battery, a first power-down delay relay, a VCU safety, a key switch, a double-pole single-throw manual switch, a first diode, a delay power-down safety, a second power-down delay relay and a VCU controller, wherein the first diode is connected with the first power-down delay relay;
The positive electrode of the storage battery is respectively connected with a first fixed contact of the double-pole single-throw manual switch and a movable contact of a first power-down delay relay, the fixed contact of the first power-down delay relay is connected with the first movable contact of the double-pole single-throw manual switch, the first movable contact of the double-pole single-throw manual switch is also respectively connected with the fixed contact of the key switch and the fixed contact of a second power-down delay relay, the movable contact of the key switch is connected with a second movable contact of the double-pole single-throw manual switch, the second fixed contact of the double-pole single-throw manual switch is connected to an ON electric awakening end of a VCU controller through a first diode,
The movable contact of the second power-down delay relay is used for being connected with each high-voltage accessory relay, the high-voltage accessory relay comprises a first power-down delay relay, a coil negative electrode of the second power-down delay relay is connected with a power-down delay control end controlled by a VCU, a low-effective signal is output when the VCU controller is awakened to enable the coil to be electrically attracted to the second power-down delay relay, a coil positive electrode of the second power-down delay relay is connected with a first movable contact of a double-pole single-throw manual switch, a coil negative electrode of the first power-down delay relay is grounded, a coil positive electrode of the first power-down delay relay is connected with a movable contact of the second power-down delay relay, and a coil power-down of the first power-down delay relay is attracted to the first power-down delay relay when the second power-down delay relay is closed, and a storage battery negative electrode is grounded.
The A+ auxiliary power supply input system is connected with an ON electric awakening end of the VCU controller through the second diode and is used for awakening the VCU controller when the gun is charged, and the VCU controller executes charging up-down high-voltage logic;
The intelligent power-supplementing system is connected with an ON electric awakening end of the VCU controller through a third diode, is connected with an intelligent power-supplementing request signal end of the VCU controller and is used for awakening the VCU controller when the intelligent power-supplementing system judges that the intelligent power-supplementing function needs to be activated, and the intelligent power-supplementing request signal end of the VCU controller is effective at the same time, so that the VCU controller executes intelligent power-supplementing logic.
Further, the vehicle-mounted power battery further comprises an all-in-one DCDC input module, wherein two ends of the all-in-one DCDC input module are respectively connected with the anode of the storage battery and the ground, and the all-in-one DCDC input module is used for converting 600V high-voltage power of the vehicle-mounted power battery into 27V high-voltage power to charge the storage battery.
Furthermore, VCU insurance is arranged between the first movable contact of the double-pole single-throw manual switch and the fixed contact of the key switch, and delayed power-down insurance is arranged between the first movable contact of the double-pole single-throw manual switch and the fixed contact of the second power-down delay relay.
In a second aspect, the invention provides a new energy heavy-duty card safe power-down method based on the new energy heavy-duty card safe power-down system, which comprises the following steps:
The key switch is turned ON to the ON gear, the key ON gear switch is turned ON, the manual switch is turned off, and when the condition of the high-voltage process is met, the high-voltage process is executed;
When the low-high voltage flow is finished, the VCU controller controls the power-down delay control end to continuously output low level until reaching a certain set delay time;
the VCU controller stops outputting low level (low level), the power-down delay relay is disconnected, and the whole vehicle stops taking power from the storage battery.
Further, the low-high pressure process condition specifically includes:
the wake-up signal of the ON gear of the VCU controller disappears for more than 1s, and the current vehicle speed is judged to be less than 5KM/h.
The control method comprises the steps that when an ON gear signal of a VCU controller disappears, the VCU controller prohibits a motor controller from enabling and controlling a motor to stop torque output, when the VCU controller receives a state fed back by a driving motor to be in a closed state, a high-voltage auxiliary part is stopped to enable (for example, an air pump, an oil pump, DCDC, an air conditioner and PTC are closed, and the state of all-in-one feedback auxiliary driving is stopped), then the VCU controller detects an operating state of a hydrogen fuel controller, a vehicle speed and a battery current, when the vehicle speed is less than 5km/h, the absolute value of the battery current is less than 10A, and the operating state fed back by the hydrogen fuel controller is standby or fault (comprising the communication loss of the hydrogen fuel controller), the main positive relay is firstly disconnected, then the auxiliary driving relay is disconnected, after the VCU controller detects the disconnection state of the main positive relay, a quick voltage-down command is sent to the motor controller, the voltage of the motor controller is enabled to be quickly reduced by a safety voltage range (below 36V), after the disconnection of the main positive relay and the auxiliary driving relay is received, the high-voltage command is sent by the VCU controller, when the battery controller receives the negative voltage, and the main relay is disconnected, and the negative voltage is not received, and when the state of the main relay is disconnected, the main relay is in the state is disconnected, and the state is finished.
Further, when the lower high pressure flow conditions are not satisfied:
If the A+ charging wake-up signal or the intelligent complementary signal of the VCU controller is effective, the VCU controller does not execute a lower high voltage flow;
If the gun is charged, the A+ charging wake-up signal continuously outputs a wake-up VCU controller, the VCU controller judges the current key switch gear, and if the key switch is not in the ON gear and the intelligent complementary electric signal is invalid, the VCU controller executes charging up-and-down high-voltage logic;
if the voltage of the storage battery is lower than 24.5V, the intelligent power supply system outputs an intelligent power supply signal to wake up the VCU controller, the VCU controller judges the current key switch gear, and if the key switch is not in the ON gear and the intelligent power supply signal is effective, the VCU controller executes intelligent power supply up-down high-voltage logic.
Further, the calculating of the current vehicle speed specifically includes:
;
Wherein V is the current speed, n is the rotation speed of an output shaft of the gearbox, r is the radius of a tire, i g is the speed ratio of a rear axle, and i 0 is the transmission ratio of a main speed reducer.
Further, the VCU controller controls the power-down delay control end to continue outputting the low level until reaching a certain set delay time specifically includes:
after the VCU controller is awakened, the power-down delay control end continuously outputs low level;
after 8s of disappearance of the wake-up signal of the VCU controller, the power-down delay control end stops outputting the low level.
Further, the VCU controller stops outputting low level, the power-down delay relay is turned off, and the whole vehicle stops taking power from the storage battery specifically comprises:
The second power-down delay relay coil is powered off, then the movable contact of the second power-down delay relay is disconnected, and each high-voltage accessory relay and the first power-down delay relay coil are powered off;
The coil of the first power-down delay relay is powered off, then the movable contact of the first power-down delay relay is disconnected, and the whole vehicle stops taking electricity from the storage battery.
Compared with the prior art, the invention has the beneficial effects that the manual switch is directly disconnected by connecting the power-down time delay relay in parallel at the manual switch, so that the wake-up power of the whole vehicle controller can be kept until the whole vehicle controller judges that the wake-up power can be disconnected at the moment, and then the whole vehicle controller sleeps, the unloading operation can be safely completed, the power-down high-voltage process can be executed according to the set process, the power-down high-voltage operation can be completed within the set time, and the safety and the efficiency are realized.
The manual switch is turned off when the vehicle is in different states (a normal high-voltage mode, a charging high-voltage mode and an intelligent power-up mode), so that the normal low high voltage of a rear-end load can be ensured, the situation that a relay is stuck or an IGBT is broken down can not occur, the situation that a motor is damaged or a battery is damaged can not occur, and the safety of a high-voltage system of the vehicle is ensured.
Drawings
Fig. 1 is a schematic diagram of a new energy heavy-duty safety power-down system.
Detailed Description
The following detailed description of the present invention is made with reference to the accompanying drawings and specific embodiments, and it is to be understood that the specific features of the embodiments and the embodiments of the present invention are detailed description of the technical solutions of the present invention, and not limited to the technical solutions of the present invention, and that the embodiments and the technical features of the embodiments of the present invention may be combined with each other without conflict.
The term "and/or" is merely an association relation describing the association object, and means that three kinds of relations may exist, for example, a and/or B, and that three kinds of cases where a exists alone, a and B exist together, and B exists alone. The character "/", generally indicates that the front and rear associated objects are an or relationship.
Examples
As shown in fig. 1, in one embodiment, the embodiment 1 provides a new energy heavy truck safety power-down system, which comprises a storage battery 2, a first power-down delay relay 6, a VCU safety 10, a key switch 8, a double-pole single-throw manual switch 7, a first diode 4, a delay power-down safety 9, a second power-down delay relay 5 and a VCU controller 1;
The positive electrode of the storage battery 2 is respectively connected with a first static contact of the double-pole single-throw manual switch 7 and a movable contact of the first lower electric delay relay 6, the static contact of the first lower electric delay relay 6 is connected with the first dynamic contact of the double-pole single-throw manual switch 7, the first dynamic contact of the double-pole single-throw manual switch 7 is also respectively connected with the static contact of the key switch 8 and the static contact of the second lower electric delay relay 5, the movable contact of the key switch 8 is connected with a second dynamic contact of the double-pole single-throw manual switch 7, the second static contact of the double-pole single-throw manual switch 7 is connected to an ON electric awakening end 15 of the VCU controller 1 through a first diode 4, the movable contact of the second lower electric delay relay 5 is used for being connected with each high-voltage accessory relay 14, the high-voltage accessory relay 14 comprises a first lower electric delay relay 6, a coil negative electrode of the second lower electric delay relay 5 is connected with a lower electric delay control end 17 controlled by a VCU, when the VCU controller 1 is awakened to output a low-effect signal to enable the coil to be in contact with the second lower electric delay coil 5 to be connected with the second lower electric delay relay 6, and the second lower electric delay relay 6 is connected with the positive electrode of the second relay 6, and the second lower relay 6 is connected with the second relay 6, and the second relay is delayed by the second relay 5.
The A+ auxiliary power supply input system 12 is connected with an ON electric awakening end 15 of the VCU controller 1 through the second diode and is used for awakening the VCU controller 1 when the gun is charged, and the VCU controller 1 executes charging up-down high-voltage logic;
The intelligent power supply system 13 is connected with the ON power wake-up end 15 of the VCU controller 1 through a third diode, and the intelligent power supply system 13 is connected with the intelligent power supply request signal end 16 of the VCU controller 1, so that when the intelligent power supply system 13 judges that the intelligent power supply function needs to be activated, the intelligent power supply request signal end 16 of the VCU controller 1 is effective while the VCU controller 1 is waken up, and then the VCU controller 1 executes the intelligent power supply logic.
The vehicle-mounted power battery further comprises an all-in-one DCDC input module 3, wherein two ends of the all-in-one DCDC input module 3 are respectively connected with the anode of the storage battery 2 and the ground, and the all-in-one DCDC input module is used for converting 600V high-voltage power of the vehicle-mounted power battery into 27V high-voltage power to charge the storage battery 2.
A VCU safety 10 is arranged between the first movable contact of the double-pole single-throw manual switch 7 and the fixed contact of the key switch 8, and a delayed power-down safety 9 is arranged between the first movable contact of the double-pole single-throw manual switch 7 and the fixed contact of the second power-down delay relay 5.
Examples
The embodiment provides a new energy heavy truck safe power-down method, which comprises the following steps of turning a key switch to an ON gear, turning ON the key ON gear switch, turning off a manual switch, and executing a high-voltage process when a high-voltage process condition is met;
When the ON-gear wake-up signal of the VCU controller disappears for more than 1s, the VCU controller prohibits the motor controller from enabling and controlling the motor to stop torque output, when the VCU controller receives the feedback state of the driving motor to be in a closed state, the VCU controller stops enabling the high-voltage auxiliary parts (when the state of closing the high-voltage auxiliary parts is in a stop state, such as an air pump, an oil pump, a DCDC, an air conditioner and a PTC), the integrated feedback auxiliary driving state), then the VCU controller detects the working state of the hydrogen fuel controller, the vehicle speed and the battery current, when the vehicle speed is less than 5km/h, the absolute value of the battery current is less than 10A, and the working state of the received feedback of the hydrogen fuel controller is standby or fault (including communication loss of the hydrogen fuel controller), the main positive relay is firstly disconnected, then the auxiliary driving relay is disconnected, after the air conditioner and the PTC relay are detected to be in a disconnected state, a quick down command is sent to the motor controller, the voltage of the motor controller is quickly reduced by a safety voltage range (below 36V), when the main positive relay and the auxiliary driving relay is disconnected, when the main positive voltage relay is disconnected, the high voltage command is received, the main relay is disconnected, and when the negative voltage is not disconnected, and the negative current is received, and the negative current is returned to the main relay is controlled, and the negative voltage is disconnected, and the negative current is controlled.
The calculation of the current vehicle speed specifically comprises the following steps:
;
Wherein V is the current speed, n is the rotation speed of an output shaft of the gearbox, r is the radius of a tire, i g is the speed ratio of a rear axle, and i 0 is the transmission ratio of a main speed reducer.
When the following high-pressure flow conditions are not satisfied:
If the A+ charging wake-up signal or the intelligent complementary signal of the VCU controller is effective, the VCU controller does not execute a lower high voltage flow;
If the gun is charged, the A+ charging wake-up signal continuously outputs a wake-up VCU controller, the VCU controller judges the current key switch gear, and if the key switch is not in the ON gear and the intelligent complementary electric signal is invalid, the VCU controller executes charging up-and-down high-voltage logic;
if the voltage of the storage battery is lower than 24.5V, the intelligent power supply system outputs an intelligent power supply signal to wake up the VCU controller, the VCU controller judges the current key switch gear, and if the key switch is not in the ON gear and the intelligent power supply signal is effective, the VCU controller executes intelligent power supply up-down high-voltage logic.
When the low-voltage flow is finished, the VCU controller controls the power-down delay control end to continuously output low level until reaching a certain set delay time, and the method specifically comprises the following steps:
after the VCU controller is awakened, the power-down delay control end continuously outputs low level;
after 8s of the wake-up signal of the VCU controller disappears, the power-down delay control end stops outputting the low level
The VCU controller stops outputting low level, and the power-down delay relay is disconnected, and the whole vehicle stops taking electricity from the storage battery specifically comprises:
The second power-down delay relay coil is powered off, then the movable contact of the second power-down delay relay is disconnected, and each high-voltage accessory relay and the first power-down delay relay coil are powered off;
The coil of the first power-down delay relay is powered off, then the movable contact of the first power-down delay relay is disconnected, and the whole vehicle stops taking electricity from the storage battery.
The whole vehicle is in a high-voltage working condition, if the manual switch is directly turned off, the whole vehicle can safely finish unloading operation, a lower high-voltage flow is executed according to a set flow, and the lower high-voltage operation can be finished within a set time, so that the vehicle is safe and efficient.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are all within the protection of the present invention.
Claims (10)
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| CN202510136333.5A CN119636422B (en) | 2025-02-07 | 2025-02-07 | A safe power-off system and method for new energy heavy-duty trucks |
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| CN202510136333.5A CN119636422B (en) | 2025-02-07 | 2025-02-07 | A safe power-off system and method for new energy heavy-duty trucks |
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| CN119636422B CN119636422B (en) | 2025-10-31 |
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| CN119636422B (en) | 2025-10-31 |
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