CN110239349B - Method and system for preventing false alarm of hybrid electric vehicle - Google Patents
Method and system for preventing false alarm of hybrid electric vehicle Download PDFInfo
- Publication number
- CN110239349B CN110239349B CN201910569269.4A CN201910569269A CN110239349B CN 110239349 B CN110239349 B CN 110239349B CN 201910569269 A CN201910569269 A CN 201910569269A CN 110239349 B CN110239349 B CN 110239349B
- Authority
- CN
- China
- Prior art keywords
- vehicle
- storage battery
- engine
- control module
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention provides a method and a system for preventing false alarm of a hybrid electric vehicle, belonging to the technical field of hybrid electric vehicles. The problem of false alarm of the vehicle function control module when the storage battery normally outputs low voltage in the prior art is solved. A method for preventing false alarm of a hybrid vehicle comprises the following steps: judging that the storage battery can normally output low voltage; starting the low voltage shield; ending the low voltage shield. The anti-error alarm system for the hybrid electric vehicle comprises a vehicle control unit capable of generating a starting engine control signal and a vehicle function control module connected with a storage battery of the vehicle, wherein the vehicle function control module is connected with the vehicle control unit and is connected with an engine controller. The invention can prevent the vehicle function control module from alarming when the storage battery normally outputs low voltage.
Description
Technical Field
The invention belongs to the technical field of hybrid vehicles, and relates to a method and a system for preventing false alarm of a hybrid vehicle.
Background
Hybrid vehicles generally have three drive modes in which a drive motor is used as a power output, an engine is used as a power output, or the engine and the drive motor are mixed together as a power output. Compared with the traditional fuel oil vehicle, the hybrid electric vehicle has the advantages of economy and environmental protection, so the hybrid electric vehicle gradually becomes the first choice for people to purchase vehicles.
The hybrid vehicle has a 12V battery that supplies power to a vehicle function control module including a vehicle single or multiple function controller such as a controller of an ESC (electronic stability control system) of the vehicle, a controller of an electronic steering system, a vehicle body controller, a transmission system controller, and the like. When the voltage of the storage battery is reduced, the normal work of the vehicle function control module can be influenced, so that the vehicle function control module can output an alarm signal to remind a driver. In the prior art, when the voltage of the storage battery is reduced to a certain value, an alarm is given, for example, in a capacity control method and a capacity control device of a low-voltage storage battery of a hybrid electric vehicle, which are disclosed in chinese patent application No. CN201611254745.6, the voltage of the low-voltage storage battery is obtained, specifically, a first voltage collected by a voltage sensor, a second voltage collected by a DCDC, and a battery power consumption accumulated voltage drop are obtained, and if a difference value between the first voltage and the second voltage is greater than a second preset value, a low-voltage alarm is given.
In the hybrid electric vehicle, the normal condition that the storage battery has normal performance but outputs low voltage temporarily exists, and if the storage battery supplies power to the vehicle starter to enable the starter to work and drive the engine to start, the voltage of the storage battery can be reduced instantly. The supply voltage that this moment battery gives vehicle function control module will greatly reduced to vehicle function control module will carry out low-voltage warning easily, but battery voltage resumes to give vehicle function control module normal power supply after the engine starts, that is to say that battery voltage can normally reduce a period of time when the vehicle normally starts the engine, therefore the low-voltage warning that vehicle function control module carried out in a period of time is very likely exactly the false positive, thereby navigating mate probably misunderstanding as the vehicle trouble, then carry out the inspection and bring unnecessary trouble and bad driving experience.
Disclosure of Invention
The invention provides a method and a system for preventing false alarm of a hybrid vehicle aiming at the problems in the prior art, and solves the technical problem of how to prevent the vehicle function control module from alarming when a storage battery normally outputs low voltage.
The invention is realized by the following technical scheme: a method for preventing false alarm of a hybrid vehicle comprises the following steps:
judging that the storage battery can normally output low voltage: when the engine needs to be started, the vehicle control unit generates a control signal for starting the engine, and the vehicle function control module judges that the storage battery supplies power to the starter to start the engine and outputs low voltage after acquiring the control signal;
start low voltage shielding: the vehicle function control module starts not to judge whether the power supply voltage of the storage battery is low voltage or not before the storage battery supplies power to the starter to start the engine;
end of low voltage shielding: the vehicle function control module judges whether the low voltage shielding is finished after the engine is started and starts to judge whether the power supply voltage of the storage battery is low voltage or not.
The method for preventing the false alarm of the hybrid vehicle comprises the steps that a vehicle control unit generates a control signal for starting an engine when the engine is required to be started, the control signal indicates that the vehicle control unit is required to control the engine to be started, namely the engine is required to be started to work, a storage battery supplies power to the starter to drive the engine to work, the voltage of the storage battery is instantly reduced, the control signal for starting the engine generated by the vehicle control unit is obtained by a vehicle function control module to enter a low-voltage shield, namely whether the power supply voltage supplied by the storage battery to the vehicle function module is low or not is judged, and the vehicle function control module does not judge the power supply voltage of the storage battery before the storage battery normally supplies power to the starter to drive the engine to work, so that the power supply voltage of the storage battery is not judged until the low-voltage shield of the engine is finished, vehicle function control module can not carry out the low-voltage alarm all, and voltage reduction causes the alert condition of vehicle function control module wrong report when avoiding appearing the battery and normally supplying power for the starter to can not make navigating mate mistake regard as the vehicle trouble, avoid the troublesome and bad drive experience of unnecessary. After the engine is started, the vehicle function control module enters normal storage battery power supply voltage judgment, if the storage battery is in normal performance, the storage battery voltage can recover after the engine is started, the vehicle function control module can not give an alarm, if the storage battery is in abnormal performance, the storage battery still outputs low voltage, then the vehicle function control module gives a low voltage alarm, and accurate alarm can be given when the storage battery generates low voltage due to faults through the operation.
In the method for preventing the false alarm of the hybrid vehicle, the control signal is output when the vehicle control unit generates the control signal for starting the engine, the engine controller and the vehicle function control module both receive the control signal through the CAN bus, after receiving the control signal, the engine controller controls the normally open switch of the relay I between the storage battery and the starter to be closed, and the vehicle function control module does not judge whether the power supply voltage of the storage battery is low voltage or not. The engine controller and the vehicle function control module both receive the control signal, the time for the engine controller and the vehicle function control module to receive the control signal is basically the same, but the vehicle function control module can immediately enter low-voltage shielding after receiving the control signal, the engine controller also needs to control the relay I to conduct the storage battery and the starter, and a certain time is consumed when the relay I conducts the storage battery and the starter, so that the vehicle function control module already enters low-voltage shielding when the storage battery supplies power to the starter. Through the operation, before the storage battery supplies power to the starter to start the engine, the vehicle function control module does not judge whether the power supply voltage of the storage battery is low voltage or not, so that the low voltage shielding of the vehicle function control module is more accurate, the storage battery does not enter the low voltage shielding after entering the power supply starting engine process, and the low voltage shielding is avoided from being invalid.
In the method for preventing the false alarm of the hybrid vehicle, when the vehicle control unit generates a control signal for starting the engine, the control signal is firstly output to the vehicle function control module, and the control signal for starting the engine is sent to the engine controller after a certain time interval. Through the operation, the vehicle function control module is ensured to enter the low-voltage shielding first, and then the storage battery can supply power to the starter, so that the low-voltage shielding is avoided being invalid.
In the method for preventing the false alarm of the hybrid vehicle, after the vehicle function control module acquires a signal sent by an engine controller that an engine is started, the vehicle function control module ends low-voltage shielding. The engine controller is a control element for directly controlling the engine, the judgment of whether the engine starts the engine controller is the most accurate, the engine can be accurately obtained by acquiring a signal sent by the engine controller, and at the moment, the vehicle function control module can normally judge whether the power supply voltage of the storage battery is low voltage.
In the method for preventing the false alarm of the hybrid vehicle, the vehicle control unit obtains a control signal which enables the power battery to start to work when the vehicle is started through a signal sent by the vehicle starting module, the vehicle function control module judges that the power battery of the vehicle is required to enter the power-on pre-charging voltage and the storage battery can output low voltage after obtaining the control signal, the vehicle function control module does not judge whether the power supply voltage of the storage battery is low voltage at the beginning, and the vehicle function control module finishes the low voltage shielding when obtaining a signal which completes the power-on pre-charging voltage of the power battery through the vehicle control unit. The power battery needs start work to carry out high-voltage power supply when the vehicle starts, can advance to go into power battery electricity when power battery starts work and go up the pre-charge operation, need cut off the route between DCDC converter and the battery when last electricity pre-charge, and the battery needs to supply power alone to the consumer on the vehicle this moment, and battery voltage can reduce, and battery performance normal time voltage can resume after power battery work. The vehicle function control module enters low-voltage shielding before the power battery is started, so that the condition that the storage battery normally outputs low voltage to give an alarm and cause false alarm is avoided.
In the method for preventing the false alarm of the hybrid vehicle, the vehicle control unit sends a control signal for starting the power battery to the battery manager and the vehicle function control module through the CAN bus, the battery manager controls the normally closed switch of the relay II between the DCDC converter and the storage battery to be disconnected after receiving the control signal, and the vehicle function control module starts not to judge whether the power supply voltage of the storage battery is low voltage or not after acquiring the control signal. Through the operation, the battery manager and the vehicle function control module both receive the control signal, the time for the battery manager and the vehicle function control module to receive the control signal is basically the same, but the vehicle function control module can immediately enter low-voltage shielding after receiving the control signal, the battery manager also needs to control the second relay to disconnect the power battery from the DCDC converter, and a certain time needs to be consumed when the second relay is controlled to act, so that the vehicle function control module already enters low-voltage shielding when the storage battery supplies power for the vehicle electric equipment independently, and the low-voltage shielding is avoided from being invalid.
In the method for preventing the false alarm of the hybrid vehicle, the vehicle control unit firstly sends a control signal for starting the power battery to the vehicle function control module, and sends the control signal for starting the power battery to the battery manager after a period of time. Through the operation, the vehicle function control module is ensured to enter the low-voltage shielding first, and then the power battery enters the starting working state, so that the low-voltage shielding is avoided being invalid.
A system for preventing false alarm of a hybrid vehicle comprises a vehicle control unit capable of generating a starting engine control signal and a vehicle function control module connected with a storage battery of the vehicle, wherein the vehicle function control module is connected with the vehicle control unit and is connected with an engine controller, the vehicle control unit sends the control signal to the vehicle function control module when generating the control signal for starting the engine, the vehicle function control module does not judge whether the power supply voltage of the storage battery is low voltage or not before the storage battery supplies power to the starting engine to start the engine after receiving the control signal for starting the engine, and the vehicle function control module judges whether the power supply voltage of the storage battery is low voltage or not after the engine is started according to the signal sent by the engine controller.
The vehicle control unit in the system for preventing false alarm of the hybrid vehicle determines that a control signal for starting the engine is generated when the engine is started, at the moment, the vehicle control unit indicates that the vehicle control unit needs to control the starting of the engine, namely the engine is started, the storage battery supplies power to the starter to drive the engine, the voltage of the storage battery is instantly reduced, the control signal for starting the engine generated by the vehicle control unit is obtained by the vehicle function control module to enter a low voltage shield, namely the vehicle function module does not judge whether the power supply voltage supplied by the storage battery to the vehicle function module is low or not, and the vehicle function control module does not judge the power supply voltage of the storage battery before the storage battery normally supplies power to the starter to drive the engine to work, so that the vehicle function control module does not perform low voltage alarm no matter how much the power supply voltage of the storage battery, the condition that voltage reduction caused vehicle function control module false alarm when the storage battery normally supplies power for the starter is avoided, so that a driver can not mistakenly think of a vehicle fault, and unnecessary trouble and bad driving experience are avoided. After the engine is started, the vehicle function control module enters normal storage battery power supply voltage judgment, if the storage battery is in normal performance, the storage battery voltage can recover after the engine is started, the vehicle function control module can not give an alarm, if the storage battery is in abnormal performance, the storage battery still outputs low voltage, then the vehicle function control module gives a low voltage alarm, and whether the storage battery generates low voltage due to failure can be accurately alarmed through the operation.
In the anti-error alarm system of the hybrid electric vehicle, the engine controller is connected with the vehicle control unit, the engine controller is connected with a first relay for switching on and off the storage battery and electrically connecting the starter, the engine controller and the vehicle function control module both receive a control signal for starting the engine sent by the vehicle control unit through a CAN bus, the engine controller controls a normally open switch of the first relay to be closed after receiving the control signal, and the vehicle function control module does not judge whether the power supply voltage of the storage battery is low voltage or not after receiving the control signal. The engine controller and the vehicle function control module both receive the control signal, the times at which the control signal is received by both are substantially the same, but the vehicle function control module can enter the low voltage shielding immediately after receiving the control signal, and the engine controller needs to control a relay to conduct the storage battery and the starter, a certain amount of time is consumed as soon as the relay switches on the battery and the starter, so that the vehicle function control module has entered the low voltage shield when the battery is supplying power to the starter, that is, the vehicle function control module starts to not judge whether the power supply voltage of the battery is a low voltage or not before the battery supplies power to the starter to start the engine by the above operation, the low-voltage shielding of the vehicle function control module is more accurate, the situation that the low-voltage shielding is started after the storage battery supplies power to the engine cannot occur, and the low-voltage shielding is avoided from being invalid.
In the anti-error alarm system of the hybrid vehicle, the vehicle control unit is connected with a vehicle starting module for sending a signal for sending a vehicle starting state, the vehicle control unit is connected with a battery manager, the battery manager is connected with a relay II for switching on and off a DCDC converter and a storage battery, the vehicle control unit obtains a control signal for starting a power battery when the vehicle is started through the signal sent by the vehicle starting module, the vehicle control unit sends the control signal for starting the power battery to the battery manager and a vehicle function control module through a CAN bus, the battery manager controls a normally closed switch of the relay II to be switched off after receiving the signal, the vehicle function control module judges that the power battery of the vehicle is required to be charged and pre-charged and the storage battery outputs low voltage after obtaining the control signal for starting the power battery, and at the moment, whether the power supply voltage of the storage battery is low voltage is not judged, and whether the power supply voltage of the storage battery is low voltage is judged when the vehicle function control module acquires a signal of finishing the electric pre-charging of the power battery through the vehicle control unit. The power battery needs to enter into work to carry out high-voltage power supply when the vehicle starts, and the path between the DCDC converter and the storage battery can be cut off when the power battery starts to work, so that the storage battery needs to supply power for electric equipment on the vehicle independently, the voltage of the storage battery can be reduced at the moment, and the voltage can be recovered when the performance of the storage battery is normal after the power battery works. The vehicle function control module enters low-voltage shielding when the power battery is started, so that the condition that the storage battery normally outputs low voltage to give an alarm and cause false alarm is avoided.
Compared with the prior art, the method and the system for preventing the false alarm of the hybrid electric vehicle have the following advantages:
1. the low-voltage shielding is carried out before the engine is started, so that no matter how much the power supply voltage of the storage battery is applied to the vehicle function control module, the vehicle function control module cannot carry out low-voltage alarming, the condition that the voltage is reduced when the storage battery normally supplies power to the starter to cause false alarming of the vehicle function control module is avoided, a driver cannot be mistaken for a vehicle fault, and unnecessary troubles and poor driving experience are avoided.
2. According to the invention, the vehicle function control module enters low-voltage shielding when the power battery is started, so that the condition of false alarm caused by alarm when the storage battery normally outputs low voltage is avoided.
Drawings
Fig. 1 is a schematic main flow chart of a method according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a system connection structure according to a first embodiment of the present invention.
In the figure, 1, a vehicle control unit; 2. a storage battery; 3. a vehicle function control module; 4. an engine controller; 5. a starter; 6. a first relay; 7. a vehicle start module; 8. a battery manager; 9. a DCDC converter; 10. and a second relay.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the drawings, but the present invention is not limited to these embodiments.
The first embodiment is as follows:
as shown in fig. 1, a method for preventing false alarm of a hybrid vehicle includes the following steps:
step A, judging that the storage battery can normally output low voltage (namely judging that the output voltage of the storage battery can normally reduce): when the engine needs to be started, the vehicle control unit 1 generates a control signal for starting the engine, the vehicle function control module 3 judges that the storage battery 2 needs to supply power to the starter 5 to start the engine after acquiring the control signal, the output voltage of the storage battery 2 is reduced, the control signal is output when the vehicle control unit 1 generates the control signal for starting the engine, and the engine controller 4 and the vehicle function control module 3 both receive the control signal through the CAN bus. The CAN bus is a common connection and communication mode for vehicles and is the prior art.
The vehicle control unit 1 generates a control signal for starting the engine to control the engine to start the engine, and generally, when the vehicle runs (the vehicle control unit 1 may obtain that the vehicle runs through a vehicle speed or a state sent by other sensors, which is not described herein in detail in the prior art), the vehicle control unit 1 obtains the electric quantity of the current power battery through a battery manager 8 (also called a battery management system, and abbreviated as BMS in english), compares the electric quantity of the current power battery with a preset threshold value, and indicates that the electric quantity of the power battery is difficult to support a motor pure electric vehicle when the electric quantity is smaller than the electric quantity threshold value, and at this time, the vehicle control unit 1 generates a control signal for starting the engine. When to generate the control signal for starting the engine is also the prior art, and the technology for starting the engine to work is mature and the control modes are more and more.
The vehicle control unit 1 generates a control signal for starting the engine and then indicates that the vehicle control unit 1 needs to start the engine, the storage battery 2 supplies power to the starter 5 at the moment, the starter 5 drives the engine again to start the engine, the storage battery 2 supplies power to the starter 5, the power of the starter 5 is high, the storage battery 2 also needs to supply power to the vehicle function control module 3, the voltage of the storage battery 2 can be rapidly reduced when the performance of the storage battery 2 is normal, and after the engine is started, the storage battery 2 can recover normal power supply.
Step B, starting low-voltage shielding: after receiving the control signal, the engine controller 4 controls the normally open switch of the relay-6 located between the battery 2 and the starter 5 to be closed, and the vehicle function control module 3 enters a low voltage shield, that is, the vehicle function control module 3 starts to not judge whether the power supply voltage of the battery 2 is low voltage before the battery 2 supplies power to the starter 5 to start the engine. The engine controller 4 and the vehicle function control module 3 both receive the control signal, the time for the engine controller 4 and the vehicle function control module 3 to receive the control signal is basically the same, but the vehicle function control module 3 can immediately enter the low voltage shield after receiving the control signal, the engine controller 4 also needs to control the relay I6 to conduct the storage battery 2 and the starter 5, the relay I6 conducts the storage battery 2 and the starter 5, so that a certain time is consumed when the storage battery 2 supplies power to the starter 5 to drive the engine, therefore, the vehicle function control module 3 enters the low voltage shield when the storage battery 2 supplies power to the starter 5, namely, the vehicle function control module starts to not judge whether the power supply voltage of the storage battery 2 is low voltage before the storage battery 2 supplies power to the starter 5 to start the engine through the operation, so that the low voltage shield of the vehicle function control module 3 is more accurate, the low-voltage shielding is not started after the storage battery 2 supplies power to start the engine, and the low-voltage shielding is avoided from being invalid.
Step C, finishing low-voltage shielding: the vehicle function control module 3 judges that the low voltage shielding is finished after the engine is started, and starts to judge whether the power supply voltage of the storage battery 2 is low voltage. In the present embodiment, the vehicle function control module 3 acquires the engine state sent by the engine controller 4, and after determining that the engine is operating, the vehicle function control module 3 ends the low voltage masking. After the engine is started, the engine controller 4 controls the first relay 6 to disconnect the electric connection between the storage battery 2 and the starter 5. The engine controller 4 is a control element that directly controls the engine, and the starting, starting operation state, engine-off state, and control of the engine are managed and transmitted by the engine controller 4, which is the own function of the engine controller 4. The vehicle function control module 3 acquires the engine state sent by the engine controller 4 to determine whether the engine is started completely. The judgment of whether the engine starts the engine controller 4 is the most accurate, the engine can be accurately obtained by obtaining a signal sent by the engine controller 4, and at the moment, the vehicle function control module 3 normally judges whether the power supply voltage of the storage battery 2 is low voltage. The low voltage determination process of the vehicle function control module 3 is to compare the input power supply voltage of the storage battery 2 with a preset voltage threshold, and determine that the storage battery 2 outputs a low voltage when it is determined that the power supply voltage is lower than the voltage threshold, and then issue an alarm. The voltage threshold ranges from 2V to 8V, preferably 6V.
In the method, low-voltage shielding work is carried out before the engine is started, and in order to comprehensively avoid false low-voltage alarm of the storage battery 2, the low-voltage shielding work is also carried out before the power battery is started to enter the power-on pre-charging state.
The vehicle control unit 1 obtains a control signal which is generated when the vehicle is started through a signal sent by the vehicle starting module 7 and enables the power battery to start to work, the vehicle function control module 3 judges that the power battery of the vehicle is required to enter the power-on pre-charging voltage after obtaining the control signal, the vehicle function control module 3 does not judge whether the power supply voltage of the storage battery 2 is low voltage, and the vehicle function control module 3 finishes low-voltage shielding when obtaining a signal that the power-on pre-charging voltage of the power battery is finished according to the vehicle control unit 1.
When a vehicle is started, a power battery enters high-voltage power supply when needing to work, which is also called high-voltage charging, the power battery starting work control is also high-voltage control on the power battery, the high-voltage charging is that the power battery is conducted with high-voltage electric equipment in the vehicle, the power battery can supply high-voltage power, pre-charging is needed when the high-voltage charging is carried out, a direct current (DCDC) converter 9(DCDC is that direct current is changed into direct current, and the DCDC converter 9 on the vehicle is a device for converting high-voltage direct current into low-voltage direct current and outputting the low-voltage direct current to the electric equipment of the vehicle) is disconnected from a channel between the storage battery 2 when the power battery is powered on and pre-charging is carried out, so that failure of power-on pre-charging is avoided. After the circuit is broken between the DCDC converter 9 and the storage battery 2, the storage battery 2 supplies power for the electric equipment on the vehicle alone, the electric equipment on the vehicle is more, and no other device is used for stabilizing the voltage of the storage battery 2, so the output voltage of the storage battery 2 is easy to reduce instantly, until the pre-charging on the power battery is completed, the DCDC converter 9 is connected with the storage battery 2 in a recovery mode to charge and stabilize the voltage of the storage battery 2, and at the moment, if the performance of the storage battery 2 is normal, the power supply voltage output by the storage battery 2 can be recovered.
The vehicle control unit 1 sends a control signal for starting the power battery to the battery manager 8 and the vehicle function control module 3 through the CAN bus, the battery manager 8 receives the control signal and then controls the normally closed switch of the relay II 10 between the DCDC converter 9 and the storage battery 2 to be switched off, and the vehicle function control module 3 starts to not judge whether the power supply voltage of the storage battery 2 is low voltage or not after obtaining the control signal for starting the power battery. Through the above operation, the battery manager 8 and the vehicle function control module 3 both receive the control signal, and the time for the battery manager 8 and the vehicle function control module 3 to receive the control signal is basically the same, but the vehicle function control module 3 can immediately enter the low voltage shielding after receiving the control signal, and the battery manager 8 also needs to control the second relay 10 to disconnect the power battery from the DCDC converter 9, and a certain time needs to be consumed when the second relay 10 is controlled to act, so that the vehicle function control module 3 already enters the low voltage shielding when the storage battery 2 supplies power to the vehicle electric equipment alone, and the low voltage shielding is avoided from being invalid. Battery manager 8 is the management controller of power battery, and the state such as electric quantity, voltage of power battery is acquireed and is sent to other controllers by battery manager 8 to battery manager 8 can control whether power supply of power battery, these are battery manager 8 own functions. After judging that the power battery is charged with pre-charging voltage, the battery manager 8 controls the relay II 10 to close to restore the electric connection and conduction between the DCDC converter 9 and the storage battery 2, and sends a charging pre-charging voltage completion signal to the vehicle control unit 1, and the vehicle function control module 3 obtains the completion of the charging pre-charging voltage of the power battery through the signal sent by the vehicle control unit 1.
As shown in FIG. 2, the method is applied to a system for preventing false alarm of a hybrid vehicle. The anti-error alarm system of the hybrid vehicle comprises a vehicle control unit 1 capable of generating a starting engine control signal and a vehicle function control module 3 connected with a storage battery 2 of the vehicle. The vehicle function control module 3 is connected with the vehicle control unit 1, and the vehicle function control module 3 is connected with the engine controller 4. The vehicle control unit 1 sends a control signal for starting the engine to the vehicle function control module 3 when generating the control signal for starting the engine, and the vehicle function control module 3 starts not to judge whether the power supply voltage of the storage battery 2 is low voltage or not before the storage battery 2 supplies power to the starter 5 for starting the engine after receiving the control signal for starting the engine. The vehicle function control module 3 judges whether the power supply voltage of the storage battery 2 is low voltage after the engine is started according to the signal sent by the engine controller 4.
The vehicle control unit 1 generates a control signal for starting the engine to control the engine to start, and the vehicle control unit 1 generally determines that the electric quantity of the power battery is difficult to support the motor pure electric vehicle when the vehicle control unit 1 determines that the vehicle is running when the vehicle is running (the vehicle control unit 1 can acquire that the vehicle is running through a state sent by a vehicle speed sensor or other sensors, and determines that the vehicle is running when the vehicle control unit 1 determines that the vehicle speed is greater than zero when the vehicle speed sensor is used, which is not described herein in the prior art), and at this time, the vehicle control unit 1 generates a control signal for starting the engine. It is also known to generate a control signal for starting the engine, and the techniques for starting the engine to operate are well known and not listed here.
The vehicle control unit 1 is connected to engine controller 4, and engine controller 4 is connected with the relay 6 that is used for break-make battery 2 and starter 5 electricity to be connected, and the positive pole power input end of starter 5 is connected to the normally open switch one end of relay 6, and the positive pole of battery 2 is connected to the other end, and the negative pole power input end of starter 5 is connected with the negative pole of battery 2 (for showing in the figure). And the coil of the first relay 6 is connected with the engine controller 4. The engine controller 4 and the vehicle function control module 3 both receive a control signal for starting the engine, which is sent by the vehicle control unit 1, through the CAN bus, and the engine controller 4 controls the normally open switch of the relay I6 to be closed after receiving the control signal, so that the storage battery 2 supplies power to the starter 5, and when the storage battery 2 supplies power to the starter 5, the controller of the vehicle function module, such as ESC, is also supplied with power.
The engine controller 4 and the vehicle function control module 3 both receive the control signal, the time for the engine controller 4 and the vehicle function control module 3 to receive the control signal is basically the same, but the vehicle function control module 3 can immediately enter the low voltage shield after receiving the control signal, the engine controller 4 also needs to control the relay I6 to conduct the storage battery 2 and the starter 5, the relay I6 conducts the storage battery 2 and the starter 5, so that a certain time is consumed when the storage battery 2 supplies power to the starter 5 to drive the engine, therefore, the vehicle function control module 3 enters the low voltage shield when the storage battery 2 supplies power to the starter 5, namely, the vehicle function control module starts to not judge whether the power supply voltage of the storage battery 2 is low voltage before the storage battery 2 supplies power to the starter 5 to start the engine through the operation, so that the low voltage shield of the vehicle function control module 3 is more accurate, the low-voltage shielding is not started after the storage battery 2 supplies power to start the engine, and the low-voltage shielding is avoided from being invalid.
The engine controller 4 can acquire the state of the engine (which is the function of the engine controller 4), and after the engine is judged to be started, the engine controller 4 controls the relay I6 to disconnect the electric connection between the storage battery 2 and the starter 5, and sends a signal that the engine is started to the vehicle function control module 3 and the vehicle control unit 1. The vehicle function control module 3 finishes low voltage shielding after receiving the signal, compares the power supply voltage supplied by the storage battery 2 to determine whether the power supply voltage is low voltage, and if the power supply voltage is low voltage, compares the power supply voltage supplied by the storage battery 2 to the controller with a voltage threshold value when the controller of the ESC included in the vehicle function control module 3 receives the signal, determines that the voltage of the storage battery 2 is low voltage when the voltage threshold value is lower than the voltage threshold value, outputs an alarm signal to the instrument panel, and sends out warning information through the instrument panel.
The vehicle control unit 1 is connected with a vehicle starting module 7 for sending the vehicle to enter a starting state. The vehicle start module 7 comprises a controller of a keyless start system, which is capable of sending a vehicle start signal. Alternatively, the vehicle starting module 7 includes an ignition switch, and determines that the vehicle enters the starting state when the ignition switch is turned off.
The vehicle control unit 1 is connected with a battery manager 8, the battery manager 8 is connected with a second relay 10 for switching on and off the DCDC converter 9 and the storage battery 2, one end of a normally closed switch of the second relay 10 is connected with the anode of the power battery, and the other end of the normally closed switch is connected with the anode input end of the DCDC converter 9. The negative electrode of the power battery is connected to the negative electrode of the DCDC converter 9 (not shown). And the coil of the second relay 10 is connected with the output end of the battery manager 8.
The vehicle control unit 1 obtains a control signal for starting a power battery when a vehicle is started through a signal sent by the vehicle starting module 7, the vehicle control unit 1 sends the control signal for starting the power battery to the battery manager 8 and the vehicle function control module 3 through the CAN bus, the battery manager 8 controls the normally closed switch of the relay II 10 to be switched off after receiving the signal, the vehicle function control module 3 judges that the power battery of the vehicle is about to enter an upper pre-charging voltage after obtaining the control signal for starting the power battery, at the moment, whether the power supply voltage of the storage battery 2 is low voltage is not judged, and the vehicle function control module 3 judges whether the power supply voltage of the storage battery 2 is low voltage according to the signal for finishing the upper pre-charging voltage of the power battery obtained by the vehicle control unit 1. When the vehicle is started, the power battery needs to be operated to supply high-voltage power, and when the power battery is started, a path between the DCDC converter 9 and the storage battery 2 is cut off, so that the storage battery 2 needs to supply power to electric equipment on the vehicle independently, and at the moment, the voltage of the storage battery 2 may be reduced, but when the performance of the storage battery 2 is normal after the power battery is operated, the voltage is recovered. The vehicle function control module 3 enters low-voltage shielding when the power battery is started, so that the storage battery 2 is prevented from normally outputting low voltage to give an alarm, and false alarm is caused. The process of the vehicle function control module 3 determining whether the power supply voltage of the storage battery 2 is low voltage is the same as the above-described low voltage determination process after the engine start is completed.
The vehicle function control module 3 includes a plurality of function controllers, which are a controller of an ESC (electronic stability control system) and a controller of an electronic steering system, a vehicle body controller, and a transmission system controller. Alternatively, the vehicle function control module 3 comprises a single function controller, which is a controller of the ESC. When the vehicle function control module 3 comprises a plurality of function controllers, the function controllers all receive signals of the vehicle control unit 1, when receiving control signals for starting an engine or control signals for starting a power battery, which are sent by the vehicle control unit 1, the function controllers all enter low-voltage shielding, namely, before the output of the power supply voltage of the storage battery 2 is reduced, the power supply voltage of the storage battery 2 is not judged, when the low-voltage shielding is finished, the function controllers all start to judge the power supply voltage of the storage battery 2, the judgment processes are the same, the input power supply voltage is compared with a preset threshold value in the function controllers, the low voltage is judged when the input power supply voltage is smaller than the preset threshold value, and an alarm is given.
The method and the system for preventing the false alarm of the hybrid vehicle judge that the voltage of the storage battery 2 can be normally reduced and shield after the hybrid vehicle starts to work, and finish low-voltage shielding after the voltage of the storage battery 2 is not normally reduced (the cause is after the engine is started when the engine is started, and the cause is after the power battery is charged and pre-charged when the power battery is started).
The method and the system for preventing the false alarm of the hybrid vehicle enter low-voltage shielding in advance when the voltage of the storage battery 2 can be normally reduced, so that the vehicle function control module 3 can not give an alarm when the storage battery 2 normally outputs the low voltage, and unnecessary troubles and bad driving experience caused by sending false alarm are avoided. And after the condition that the voltage of the storage battery 2 is normally reduced is over, the vehicle function control module 3 enters the judgment of the normal power supply voltage of the storage battery 2, so that the method and the system for preventing the false alarm of the hybrid vehicle can accurately alarm whether the storage battery 2 has a fault and generates low voltage.
Example two:
the structure and principle of the second embodiment are basically the same as those of the first embodiment, and the difference is that: when the vehicle control unit 1 generates a control signal for starting the engine, the control signal is firstly output to the vehicle function control module 3, and the control signal for starting the engine is sent to the engine controller 4 after a certain time interval. The engine controller 4 receives the control signal and controls the storage battery 2 to supply power to the starter 5. Through the operation, the vehicle function control module 3 is ensured to enter the low-voltage shielding, and then the storage battery 2 supplies power to the starter 5, so that the low-voltage shielding is prevented from being invalid. The interval time is preferably 3 milliseconds.
Example three:
the third embodiment is basically the same as the first embodiment in structure and principle, and the difference is that: the vehicle control unit 1 firstly sends a control signal for starting the power battery to the vehicle function control module 3, and sends the control signal to the battery manager 8 after a period of time. And after receiving the signal, the battery manager 8 controls the relay II 10 to be switched off, so that the DCDC converter 9 and the storage battery 2 are powered off. Through the operation, the vehicle function control module 3 is ensured to enter the low-voltage shielding firstly, and then the power battery enters the starting working state, so that the low-voltage shielding is prevented from being invalid. The interval time is preferably 3 milliseconds.
The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms vehicle control unit 1, battery 2, vehicle function control module 3, engine controller 4, starter 5, relay one 6, vehicle start module 7, battery manager 8, DCDC converter 9, relay two 10, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (8)
1. A method for preventing false alarm of a hybrid vehicle is characterized by comprising the following steps:
judging that the storage battery (2) can normally output low voltage: when the engine needs to be started, the vehicle control unit (1) generates a control signal for starting the engine, the vehicle function control module (3) acquires the control signal and then judges that the storage battery (2) needs to supply power to the starter (5) to start the engine and the storage battery (2) can output low voltage;
start low voltage shielding: the method comprises the following steps that before a storage battery (2) supplies power to a starter (5) to start an engine, a vehicle function control module (3) starts to judge whether the power supply voltage of the storage battery (2) is low or not, when a vehicle control unit (1) generates a control signal for starting the engine, the control signal is output, the engine controller (4) and the vehicle function control module (3) both receive the control signal through a CAN (controller area network) bus, after receiving the control signal, the engine controller (4) controls a normally open switch of a relay I (6) positioned between the storage battery (2) and the starter (5) to be closed, and the vehicle function control module (3) does not judge whether the power supply voltage of the storage battery (2) is low or not;
end of low voltage shielding: the vehicle function control module (3) judges that the low-voltage shielding is finished after the engine is started, and starts to judge whether the power supply voltage of the storage battery (2) is low.
2. A method for preventing false alarm of a hybrid vehicle is characterized by comprising the following steps:
judging that the storage battery (2) can normally output low voltage: when the engine needs to be started, the vehicle control unit (1) generates a control signal for starting the engine, the vehicle function control module (3) acquires the control signal and then judges that the storage battery (2) needs to supply power to the starter (5) to start the engine and the storage battery (2) can output low voltage;
start low voltage shielding: before the storage battery (2) supplies power to the starter (5) to start the engine, the vehicle function control module (3) does not judge whether the power supply voltage of the storage battery (2) is low voltage, when the vehicle control unit (1) generates a control signal for starting the engine, the control signal is firstly output to the vehicle function control module (3), and the control signal for starting the engine is sent to the engine controller (4) at intervals;
end of low voltage shielding: the vehicle function control module (3) judges that the low-voltage shielding is finished after the engine is started, and starts to judge whether the power supply voltage of the storage battery (2) is low.
3. The method for preventing false alarm of hybrid vehicle according to claim 1 or 2, characterized in that after the vehicle function control module (3) acquires the signal sent by the engine controller (4) that the engine has started, the vehicle function control module (3) ends the low voltage shielding.
4. The method for preventing the false alarm of the hybrid vehicle according to claim 3, wherein the vehicle control unit (1) obtains a control signal for starting the power battery when the vehicle is started through a signal sent by the vehicle starting module (7), the vehicle function control module (3) determines that the power battery of the vehicle is about to enter the power-on pre-charging voltage and the storage battery (2) outputs a low voltage after obtaining the control signal, the vehicle function control module (3) does not start to determine whether the power supply voltage of the storage battery (2) is a low voltage, and the vehicle function control module (3) finishes the low-voltage shielding when obtaining the signal for finishing the power-on pre-charging voltage of the power battery through the vehicle control unit (1).
5. The method for preventing the false alarm of the hybrid vehicle according to claim 4, wherein the vehicle control unit (1) sends a control signal for starting the power battery to the battery manager (8) and the vehicle function control module (3) through the CAN bus, the battery manager (8) controls a normally closed switch of a second relay (10) between the DCDC converter (9) and the storage battery (2) to be switched off after receiving the control signal, and the vehicle function control module (3) starts to not judge whether the power supply voltage of the storage battery (2) is low voltage after acquiring the control signal.
6. The method for preventing false alarm of hybrid vehicle according to claim 4, wherein the vehicle controller (1) first sends a control signal for activating the power battery to the vehicle function control module (3), and after a certain time interval, sends a control signal for activating the power battery to the battery manager (8).
7. A system for preventing false alarm of a hybrid vehicle comprises a vehicle control unit (1) capable of generating a starting engine control signal and a vehicle function control module (3) connected with a storage battery (2) of the vehicle, and is characterized in that the vehicle function control module (3) is connected with the vehicle control unit (1), the vehicle function control module (3) is connected with an engine controller (4), the vehicle control unit (1) sends the control signal to the vehicle function control module (3) when generating the control signal for starting the engine, the vehicle function control module (3) does not judge whether the power supply voltage of the storage battery (2) is low voltage or not before the storage battery (2) supplies power to the starter (5) to start the engine after receiving the control signal for starting the engine, the vehicle function control module (3) judges that the engine is started according to the signal sent by the engine controller (4), whether the power supply voltage of the storage battery (2) is judged to be low voltage or not by the vehicle function control module (3), the whole vehicle controller (1) is connected with the engine controller (4), the relay I (6) which is used for switching on and off the storage battery (2) and electrically connected with the starter (5) is connected with the engine controller (4), the engine controller (4) and the vehicle function control module (3) receive a control signal of starting the engine sent by the whole vehicle controller (1) through a CAN bus, the normally open switch of the relay I (6) is controlled to be closed after the engine controller (4) receives the control signal, and the vehicle function control module (3) does not judge whether the power supply voltage of the storage battery (2) is low voltage or not after receiving the control signal.
8. The anti-false alarm system of the hybrid vehicle according to claim 7, wherein the vehicle control unit (1) is connected with a vehicle start module (7) for sending a signal that the vehicle enters a start state, the vehicle control unit (1) is connected with a battery manager (8), the battery manager (8) is connected with a second relay (10) for switching on and off a DCDC converter (9) and electrically connecting with the storage battery (2), the vehicle control unit (1) obtains a control signal for starting the power battery when the vehicle is started through the signal sent by the vehicle start module (7), the vehicle control unit (1) sends the control signal for starting the power battery to the battery manager (8) and the vehicle function control module (3) through a CAN bus, and the battery manager (8) controls the normally closed switch of the second relay (10) to be switched off after receiving the signal, the vehicle function control module (3) judges that the vehicle power battery enters power-on pre-charging and the storage battery (2) can output low voltage after acquiring a control signal for enabling the power battery to work, at the moment, whether the power supply voltage of the storage battery (2) is low voltage is not judged, and the vehicle function control module (3) judges whether the power supply voltage of the storage battery (2) is low voltage or not when acquiring a signal for completing the power-on pre-charging of the power battery through the vehicle control unit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910569269.4A CN110239349B (en) | 2019-06-27 | 2019-06-27 | Method and system for preventing false alarm of hybrid electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910569269.4A CN110239349B (en) | 2019-06-27 | 2019-06-27 | Method and system for preventing false alarm of hybrid electric vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110239349A CN110239349A (en) | 2019-09-17 |
| CN110239349B true CN110239349B (en) | 2021-01-22 |
Family
ID=67889934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910569269.4A Active CN110239349B (en) | 2019-06-27 | 2019-06-27 | Method and system for preventing false alarm of hybrid electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110239349B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239524A (en) * | 2020-02-27 | 2020-06-05 | 东风小康汽车有限公司重庆分公司 | Detection method and system for electronic module during automobile starting |
| CN114148270B (en) * | 2021-11-25 | 2023-10-27 | 上汽通用五菱汽车股份有限公司 | Low-voltage fault warning shielding method, system and medium in engine starting process |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492034B (en) * | 2009-02-17 | 2010-12-08 | 郑州宇通客车股份有限公司 | Car battery device and control method thereof |
| EP2272722B1 (en) * | 2009-07-01 | 2015-04-08 | Denso Corporation | Power source apparatus for vehicle |
| CN103042944B (en) * | 2012-12-15 | 2015-11-18 | 安徽工程大学 | A kind of electrical automobile driver |
| JP6579068B2 (en) * | 2016-09-16 | 2019-09-25 | トヨタ自動車株式会社 | Fuel cell output performance diagnostic device, fuel cell output performance diagnostic system, fuel cell output performance diagnostic method, and fuel cell output performance diagnostic program |
-
2019
- 2019-06-27 CN CN201910569269.4A patent/CN110239349B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110239349A (en) | 2019-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9645185B2 (en) | AC traction motor fault detection using DC bus leakage hardware | |
| CN101814720B (en) | Electric vehicle inverter apparatus and protection method therefor | |
| CN101614177B (en) | Engine cranking system and engine cranking method | |
| CN102897114B (en) | The discharge technology of the residual high pressure in motor vehicle driven by mixed power and its method | |
| CN101730965B (en) | Electric vehicle | |
| US10000137B2 (en) | Hybrid vehicle with means for disconnection of a depleted auxiliary battery in order to allow for more rapid main battery charging | |
| KR100829307B1 (en) | Fault diagnosis control method for high voltage relay of hybrid electric vehicle | |
| CN103857554A (en) | Charging control device for vehicle, and vehicle equippped with same | |
| CN101318475A (en) | Simplified automatic discharge function for vehicles | |
| KR101714243B1 (en) | Apparatus and method for diagonising current sensor of green car | |
| CN110239349B (en) | Method and system for preventing false alarm of hybrid electric vehicle | |
| KR20140142598A (en) | Multi-channel electric power charging system for EV(Eletric Vehicle) | |
| KR101664745B1 (en) | Method for detecting fusion of relay of battery | |
| CN113691010B (en) | Redundant power supply system and control method | |
| CN102874256B (en) | Method for starting hybrid sedan | |
| US11012020B2 (en) | Electronic control unit | |
| EP4316938A1 (en) | Vehicle control method, and vehicle | |
| CN103612571B (en) | Electric automobile storage battery failure emergency control system | |
| JP7281340B2 (en) | vehicle power supply | |
| CN102114765B (en) | Hybrid power drive system and control method and vehicle provided with system | |
| CN110979221A (en) | Power supply control method and device for vehicle and vehicle | |
| CN210652696U (en) | New energy automobile and low-voltage power supply circuit thereof | |
| CN115027269A (en) | Redundant power supply system, redundant power supply control method and vehicle | |
| CN114475489A (en) | Power supply system of automobile, automobile and control method of power supply system of automobile | |
| CN108541244A (en) | Engine startup system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |