CN113103916A - New energy automobile battery protection mode control method - Google Patents
New energy automobile battery protection mode control method Download PDFInfo
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- CN113103916A CN113103916A CN202110528698.4A CN202110528698A CN113103916A CN 113103916 A CN113103916 A CN 113103916A CN 202110528698 A CN202110528698 A CN 202110528698A CN 113103916 A CN113103916 A CN 113103916A
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- 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
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- 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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- 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
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Abstract
The invention discloses a new energy automobile battery protection mode control method, which is characterized in that the battery protection is realized by classifying the states of power batteries into 'inactive', 'primary protection standby', 'primary protection active', 'secondary protection standby' and 'secondary protection active', and by different control strategies in different states in real time.
Description
Technical Field
The invention relates to a vehicle energy-saving technology, in particular to a battery protection technology, and particularly relates to a battery protection mode control method of a new energy automobile.
Background
The new energy automobile comprises a plug-in hybrid electric automobile, a range-extended electric automobile, a pure electric automobile and the like. Either way, it is crucial to the protection of the power battery.
The electric control function configuration of the new energy automobile on the current market is more and more, such as remote information query, remote air conditioning, remote seat heating, remote control driving, remote control parking, automatic valet parking, sentinel mode, central control door lock, welcome system, HMI and intelligent DCDC, so that the energy consumption of the automobile is more and more increased when the automobile is not driven. After the vehicle is placed for a long time, the electric control functions or parts still have the possibility of running, so that the power battery is easy to over-discharge, a driver cannot start the vehicle, and the problem of inconvenient use is caused.
The invention patent of 'vehicle low power consumption dormancy control method and control system thereof' (application number 201810789606.6) discloses a vehicle low power consumption dormancy control method and control system thereof, which can control a vehicle to enter an ultra-low power consumption mode according to a user request, thereby reducing the quiescent current power consumption of a low-voltage system, reducing the charging amount of a high-voltage power battery to a low-voltage storage battery, reducing the energy loss of the power battery and further increasing the standby time of the whole vehicle.
However, the comparative patents have the following problems:
1. the method is based on a manual control mode, automatic control is not realized, and the problem of over-discharge of a power battery cannot be solved if a user forgets to request to control a vehicle to enter an ultra-low power consumption mode;
2. the aim of prolonging the standby time of the whole vehicle is achieved only by reducing the quiescent current power consumption of a low-voltage system, functions related to high-voltage electricity, such as remote air conditioning, remote seat heating, remote driving, remote parking, automatic passenger-riding parking and the like, are not limited, and the control effect is limited.
3. When the vehicle is charged, the standby time of the whole vehicle does not need to be increased, at the moment, the ultra-low power consumption mode is started, and the control target is meaningless.
Therefore, it is particularly important to develop an intelligent power battery protection technology to prevent the power battery from being over-discharged, so as to protect the power battery and improve the convenience of users.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a new energy automobile battery protection mode control method, which can realize automatic protection of a power battery and can avoid energy waste.
The technical scheme adopted by the invention is as follows: a new energy automobile battery protection mode control method defines the states of a power battery and comprises the following steps: "inactivated", "primary protection inactive", "primary protection activated", "secondary protection inactive", "secondary protection activated",
when all the following conditions are met at the same time, the power battery jumps from an inactive state to a primary protection standby state:
1) the power mode transmitted by the body area controller is OFF,
2) the SOC of the power battery is between A% and B%,
3) the SOC of the storage battery is more than or equal to C percent,
4) the vehicle is not in a state of charge,
(II) when one of the following two conditions A, B occurs, the power battery jumps from the 'primary protection standby' state to the 'primary protection active' state:
A. the auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC all feed back 'enter a primary protection state',
B. the timer is set to exceed a preset time period,
and (III) when any condition is met, the power battery jumps from the 'primary protection activation' to the 'non-activation' state:
1) the power mode transmitted by the body area controller is not OFF,
2) the SOC of the power battery is more than or equal to B percent, and the vehicle is in a charging state,
and (IV) when all the following conditions are met simultaneously, the power battery jumps from the inactive state to the secondary protection standby state:
1) the power mode transmitted by the body area controller is OFF,
2) the SOC of the power battery is less than or equal to A percent, or the SOC of the power battery is between A percent and B percent and the SOC of the storage battery is less than C percent,
3) the vehicle is in an uncharged state and,
(V) when one of the following two conditions A, B occurs, the power battery jumps from the 'secondary protection standby' state to the 'secondary protection active' state:
A. the auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC all feed back 'enter a secondary protection state',
B. the timer is set to exceed a preset time period,
and (VI) when any condition is met, the power battery jumps from the 'secondary protection activation' to the 'non-activation' state:
1) the power mode transmitted by the body area controller is not OFF,
2) the SOC of the power battery is more than or equal to B percent, and the vehicle is in a charging state,
and (seventhly) when the power battery is in a 'primary protection standby' state, if the SOC of the storage battery is less than C%, the battery jumps from the 'primary protection standby' state to a 'secondary protection standby' state.
When the power battery jumps from the inactive state to the primary protection standby state:
1) the power domain controller disables the remote air conditioner and the remote seat heating function,
2) the auxiliary driving domain controller disables the sentinel mode, remotely drives, remotely parks and automatically replaces the functions of parking,
3) the body area controller forbids the functions of a central control door lock and a welcome system,
4) the HMI pushes the 1), 2) and 3) function disabling notification to the mobile phone end,
5) the DCDC reduces the frequency of detecting the low-voltage battery SOC.
When the power battery jumps from 'primary protection standby' to 'primary protection activated' state, the power domain controller, the auxiliary driving domain controller, the vehicle body domain controller and the DCDC response all enter a dormant state.
When the power battery jumps from the 'primary protection activation' to the 'non-activation' state:
1) the power domain controller removes the forbidding of the remote air conditioner and the remote seat heating,
2) the auxiliary driving domain controller removes the forbidding of sentinel model, remote driving, remote parking and automatic passenger-replacing parking,
3) the vehicle body domain controller releases the forbidding of the central control door lock and the welcome system,
4) the HMI pushes a disablement notification to the mobile phone end,
5) the DCDC recovery detects the frequency of the battery SOC.
When the power battery jumps from the inactive state to the secondary protection standby state:
1) the power domain controller disables the remote air conditioner and the remote seat heating function,
2) the auxiliary driving domain controller disables the sentinel mode, remotely drives, remotely parks and automatically replaces the functions of parking,
3) the body area controller forbids the functions of a central control door lock and a welcome system,
4) the HMI pushes a forbidden notice to the mobile phone end and then enters deep sleep,
5) the DCDC is disabled.
When the power battery jumps from the 'secondary protection standby' to the 'secondary protection activated' state:
1) the power domain controller, the auxiliary driving domain controller, the vehicle body domain controller and the DCDC all enter a dormant state,
2) the HMI enters a deep sleep state.
When the power battery jumps from the 'secondary protection activation' to the 'non-activation' state:
1) the power domain controller removes the forbidding of the remote air conditioner and the remote seat heating,
2) the auxiliary driving domain controller removes the forbidding of sentinel model, remote driving, remote parking and automatic passenger-replacing parking,
3) the vehicle body domain controller releases the forbidding of the central control door lock and the welcome system,
4) the HMI pushes a disablement notification to the mobile phone end,
5) the DCDC recovery detects the frequency of the battery SOC.
When the power battery jumps from the 'primary protection standby' to the 'secondary protection standby' state:
1) the power domain controller disables the remote air conditioner and the remote seat heating function,
2) the auxiliary driving domain controller disables the sentinel mode, remotely drives, remotely parks and automatically replaces the functions of parking,
3) the body area controller forbids the functions of a central control door lock and a welcome system,
4) the HMI pushes a forbidden notice to the mobile phone end and then enters deep sleep,
5) the DCDC is disabled.
The invention defines several different states for the power battery, and achieves the grading protection processing for the power battery through the random conversion of several states under the monitoring of the power domain controller, thereby reducing the energy consumption of the vehicle and realizing the automatic protection of the power battery.
Drawings
Fig. 1 is a flowchart of a new energy vehicle battery protection mode control method according to the present invention.
Detailed Description
The present invention is described in detail below with reference to the drawings and examples, but it should be understood by those skilled in the art that the following examples are not intended to limit the technical solutions of the present invention, and any equivalent changes or modifications made within the spirit of the technical solutions of the present invention should be considered as falling within the protection scope of the present invention.
Related abbreviations and term interpretations:
a power domain controller: the system is used for controlling a vehicle power system and a transmission system, and integrates the functions of power-on and power-off control, vehicle energy management, vehicle fault management, vehicle torque control, power battery management (if any), charging control (if any), driving motor control (if any), range extender control (if any), transmission control (if any) and the like.
An auxiliary driving area controller: the auxiliary driving system for controlling the vehicle integrates advanced driving auxiliary functions of self-adaptive cruise, lane keeping, navigation auxiliary, automatic parking, remote control parking, automatic passenger-replacing parking, automatic emergency braking, sentinel modes and the like.
A vehicle body area controller: the control system is used for controlling a vehicle body system and integrates control functions of a power window, a power rearview mirror, an air conditioner, a headlamp, a steering lamp, a defrosting device, an anti-theft system, a power supply mode, a central control door lock, a welcome system and the like.
Remote information inquiry: vehicle information such as parking position, SOC, air conditioner state, door and window state and the like is inquired through a mobile phone network.
Remote air conditioning: the air conditioner is started through the mobile phone network, a driver can turn on the air conditioner in advance through the function, and when the driver walks into the automobile, the temperature in the automobile reaches the expectation.
Remote seat heating: seat heating is started through a mobile phone network. The driver can heat and open the seat in advance through the function, and the temperature of the seat reaches the expectation when the driver walks into the vehicle.
Remote control driving: the driver can control the vehicle to run at low speed through a remote control/mobile phone network, and the vehicle parking system is mainly used for running out of narrow parking spaces and is convenient for the driver to get on the vehicle.
Remote control parking: the driver can start the remote control parking function of the vehicle through the remote control/mobile phone network, and then the vehicle drives into the parking space by self. The parking device is mainly used for driving out a narrow parking space and avoiding the situation that a driver cannot get off the vehicle after parking.
Automatic passenger-replacing parking: before parking, a driver can get off at any place in the garage, and a parking function in automatic passenger-replacing parking is started through a remote control/mobile phone; and then the vehicle automatically drives in the scene, searches for a specific parking space, performs parking action, and powers off after parking is finished. When a driver uses the vehicle, the calling sub-function in the automatic passenger-replacing parking can be started at any place of the garage through a remote control/mobile phone; and then the vehicle is powered on, automatically drives under the scene, searches for the driver, and automatically stops after driving to the driver.
Intelligent DCDC (DC to DC Converter): the low-voltage storage battery voltage/state of charge (SOC) can be detected when the automobile is powered off, if the low-voltage storage battery voltage/SOC is low, the VCU can be awakened by the intelligent DCDC, the VCU controls the automobile to be powered on at high voltage, and then the power battery can be charged to the low-voltage storage battery through the intelligent DCDC so as to ensure that the automobile can be started normally.
Power mode: OFF gear, close; ACC gear, electrical accessories are available; ON gear, operation; start gear, (engine) Start.
The central control door lock: for short, when a driver locks the vehicle door at his side, other vehicle doors are also locked at the same time, and the driver can open each vehicle door at the same time through a door lock switch and can also open a certain vehicle door independently.
HMI: and (5) a human-computer interaction interface.
Deep dormancy of the HMI: the system on chip in HMI is closed, the 5G module connection is closed, the (android or Linux) system is closed in standby mode, and the state with extremely low energy consumption is entered, but the next startup needs several minutes (similar to the startup of a computer and a mobile phone).
An EEPROM: the electrified erasable programmable read only memory.
The invention provides a new energy automobile battery protection mode control method, which divides a protection mode of a power battery into five states, namely an inactivated state, a primary protection standby state, a primary protection activated state, a secondary protection standby state and a secondary protection activated state, wherein a controller adjusts the protection mode of the battery in real time according to the state of a vehicle, a main program of the control is recommended to be integrated in a power domain controller, and subprograms are recommended to be integrated in other controllers.
And before the controllers are in dormancy, the state of the battery protection mode is stored in an EEPROM, the state value stored in the EEPROM is read at the moment of awakening again to serve as the current state of the battery protection mode, and the power domain controller starts the default state to be inactive. The state of the battery protection mode includes several changes as follows: "unactivated" jumps to "primary protection inactive", 2. "primary protection inactive" jumps to "primary protection active", 3. "primary protection active" jumps to "unactivated", 4. "unactivated" jumps to "secondary protection inactive", 5. "secondary protection inactive" jumps to "secondary protection active", 6. "secondary protection active" jumps to "unactivated", 7. "primary protection inactive" jumps to "secondary protection inactive", wherein,
as shown in fig. 1, the transition of each state and the process control are as follows:
one, jump from 'inactive' to 'primary protection for standby'
When all the following conditions are met at the same time, the power domain controller controls the battery to jump from the inactive state to the primary protection standby state:
1) the power mode transmitted by the body area controller is OFF.
2) The SOC of the power battery is between 5% and 10% (this is a self-defined preferred value, and the SOC displayed by the corresponding meter is 0% to 5%).
3) The SOC of the low-voltage storage battery detected by the DCDC is more than or equal to 40 percent (which is a self-defined optimal value).
4) The vehicle is not in a charging state.
The 'inactive' means that the battery is in an unprotected state, when the battery jumps to a 'primary protection standby' state from the 'inactive' state, the power domain controller simultaneously sends a 'power battery primary protection' request to the auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC, and then partial remote control functions of the power domain are disabled, such as: and heating the remote air conditioner and the remote seat, and starting a first timer.
The auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC respond to a 'power battery primary protection' request, wherein:
1) the auxiliary driving domain controller disables a sentinel mode, remotely drives, remotely parks and automatically parks for the passenger, and feeds back 'entering a primary protection state' to the power domain controller.
2) The vehicle body domain controller forbids a central control door lock and a welcome system and feeds back 'entering a primary protection state' to the power domain controller.
3) The HMI pushes functions of 'low vehicle electric quantity, deep dormancy, sentinel mode, remote driving, remote parking, automatic passenger-replacing parking, central control door lock, welcome system, remote control and the like' to the mobile phone end through the network, and feeds back 'entering a primary protection state' to the power domain controller.
4) The intelligent DCDC reduces the frequency of detecting the low-voltage battery SOC (e.g., from once detection for 1 day to once detection for 5 days), and feeds back "enter a primary protection state" to the power domain controller.
Two, first-level protection standby ' jump to ' first-level protection activation '
Both of the following A, B scenarios may cause the battery to jump from a "primary protection inactive" state to a "primary protection active" state.
A. When all the following conditions are met at the same time, the power domain controller controls the battery to jump from a 'primary protection standby' state to a 'primary protection activated' state:
1) the auxiliary driving area controller feeds back 'enter primary protection state'.
2) The body area controller has fed back "enter primary protection state".
3) The HMI has fed back "enter primary protection state".
4) The DCDC has fed back "enter primary protection state".
B. When the timer exceeds 3s (preset waiting time), the power domain controller also controls the battery to jump from 'primary protection standby' to 'primary protection activated' state.
When the battery jumps from 'primary protection standby' to 'primary protection activation', the power domain controller simultaneously sends 'dormancy' requests to the auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC, and then the power domain controller sleeps.
And the auxiliary driving domain controller, the vehicle body domain controller and the DCDC respond to the 'sleep' request and all enter a sleep state.
Three, "first-level protection activation" jumps to "not activated"
When any condition is met, the power domain controller controls the battery to jump from a 'primary protection activation' state to an 'inactive' state:
1) the power mode transmitted by the body area controller is not OFF.
2) The SOC of the power battery is more than or equal to 10 percent, and the vehicle is in a charging state.
And at the moment that the power domain controller controls the battery to jump from 'primary protection activation' to 'non-activation' state, simultaneously sending a 'battery protection mode exit' request to the auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC.
The auxiliary driving domain controller, the vehicle body domain controller, the HMI, the DCDC respond to a "battery protection mode exit" request, wherein:
1) the auxiliary driving domain controller releases the forbidding of sentinel mode, remote control driving, remote control parking and automatic passenger-replacing parking, and feeds back 'exit protection state' to the power domain controller.
2) The vehicle body domain controller removes the forbidding of the central control door lock and the welcome system, and feeds back the exit protection state to the power domain controller.
3) The HMI pushes functions such as vehicle deep dormancy quit, sentinel mode, remote control driving, remote control parking, automatic passenger-substitute parking, central control door lock, welcome system, remote control and the like to the mobile phone end through the network, and feeds back a quit protection state to the power domain controller.
4) The intelligent DCDC recovers the frequency of detecting the SOC of the battery (e.g., from once detection for 5 days to once detection for 1 day), and feeds back "exit protection state" to the power domain controller. Thereafter, if the power mode is kept OFF, the intelligent DCDC function can be reused for at most 3 times (self-defined times), so as to prevent the consumption of charging the storage battery, and ensure the power supply capacity of the storage battery as much as possible on the premise of not damaging the power battery, so that the vehicle can be powered on again.
Fourthly, jumping from 'unactivated' to 'secondary protection for standby'
And simultaneously, all the following conditions are met, the power domain controller controls the battery to jump to a secondary protection standby state from 'inactive':
1) the power mode transmitted by the body area controller is OFF.
2) The SOC of the power battery is less than or equal to 5 percent (the optimal value is 0 percent corresponding to the SOC displayed by the instrument), or the SOC of the power battery is between 5 percent and 10 percent and the SOC of the storage battery sent by the DCDC is less than 40 percent.
3) The vehicle is in an uncharged state.
Wherein, the power domain controller sends the request of 'power battery secondary protection' to the auxiliary driving domain controller, the vehicle body domain controller, HMI, DCDC at the moment when controlling the battery to enter the 'secondary protection standby' state, and then forbids some remote control functions of the power domain as follows: and heating the remote air conditioner and the remote seat, and simultaneously starting a second timer.
The auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC respond to a 'power battery secondary protection' request, wherein:
1) the auxiliary driving domain controller disables a sentinel mode, remotely drives, remotely parks and automatically parks for the passenger, and feeds back 'entering a secondary protection state' to the power domain controller.
2) The vehicle body domain controller forbids a central control door lock and a welcome system and feeds back 'entering a secondary protection state' to the power domain controller.
3) The HMI pushes functions of ' low vehicle electric quantity, deep dormancy, sentinel mode, remote driving, remote parking, automatic passenger-replacing parking, central control door lock, welcome system, remote control and the like ' to the mobile phone end through the network, the screen starting time is long when the automobile is used next time ', the HMI feeds back ' the state of entering a secondary protection state ' to the power domain controller, and then the HMI enters the deep sleep.
4) The intelligent DCDC disables the DCDC functionality and feeds back "enter secondary protection state" to the power domain controller (since the power cell is under too much operating pressure to charge him if the battery charge is low).
Fifthly, jumping to secondary protection activation for standby secondary protection "
And simultaneously, all the following conditions are met, the power domain controller controls the battery to jump from a 'secondary protection standby' state to a 'secondary protection activated' state:
1) and assisting the driving area controller to feed back to enter a secondary protection state.
2) And the vehicle body domain controller feeds back to enter a secondary protection state.
3) HMI feedbacks "enter secondary protection state".
4) The "enter secondary protection state" of the DCDC feedback.
Or when the second timer exceeds 3s (is a self-defined time threshold), the 'secondary protection standby' is still switched to 'secondary protection activation'.
When the battery enters a 'secondary protection activation' state, the power domain controller simultaneously sends a 'dormancy' request to the auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC, and then the power domain controller sleeps.
The auxiliary driving domain controller, the vehicle body domain controller and the DCDC are all in a dormant state in response to a 'dormant' request.
The HMI enters a deep sleep state.
Sixthly, the 'secondary protection activation' jumps to 'non-activation'
The power domain controller controls the battery to jump from the 'secondary protection activation' state to the 'non-activation' state according to the following arbitrary conditions:
1) the power mode transmitted by the body area controller is not OFF.
2) The SOC of the power battery is more than or equal to 10 percent, and the vehicle is in a charging state.
At the instant the battery enters the "inactive" state, the power domain controller is deactivated and a "battery protection mode exit" request is sent to the auxiliary drive domain controller, the body domain controller, HMI, DCDC.
The auxiliary driving domain controller, the vehicle body domain controller, the HMI, the DCDC respond to a "battery protection mode exit" request, wherein:
1) the auxiliary driving domain controller releases the forbidding of sentinel mode, remote control driving, remote control parking and automatic passenger-replacing parking, and feeds back 'exit protection state' to the power domain controller.
2) The vehicle body domain controller removes the forbidding of the central control door lock and the welcome system, and feeds back the exit protection state to the power domain controller.
3) The HMI pushes functions such as vehicle deep dormancy quit, sentinel mode, remote control driving, remote control parking, automatic passenger-substitute parking, central control door lock, welcome system, remote control and the like to the mobile phone end through the network, and feeds back a quit protection state to the power domain controller.
4) The intelligent DCDC removes the forbidding of the DCDC, feeds back 'exit protection state' to the power domain controller, and recovers the normal detection frequency.
Seven, first-level protection standby is jumped to second-level protection standby "
When the power battery is in a 'primary protection standby' state, if the SOC of the storage battery sent by the DCDC is lower than 40%, the battery jumps from the 'primary protection standby' state to a 'secondary protection standby' state.
Therefore, the invention controls different states of the vehicle in different periods through the power domain controller and distributes commands to the sub-controllers, thereby reducing the energy consumption of the vehicle and realizing the grading protection treatment of the power battery.
The correlation thresholds referred to above are such as: the SOC values of the power battery 5% and 10%, the SOC value of the battery 40%, and the timer count 3s are all self-set thresholds, and may be self-set as necessary in practice.
Claims (8)
1. A new energy automobile battery protection mode control method is characterized by comprising the following steps: the state of the power battery is defined to comprise the following steps: "inactivated", "primary protection inactive", "primary protection activated", "secondary protection inactive", "secondary protection activated",
when all the following conditions are met at the same time, the power battery jumps from an inactive state to a primary protection standby state:
1) the power mode transmitted by the body area controller is OFF,
2) the SOC of the power battery is between A% and B%,
3) the SOC of the storage battery is more than or equal to C percent,
4) the vehicle is not in a state of charge,
(II) when one of the following two conditions A, B occurs, the power battery jumps from the 'primary protection standby' state to the 'primary protection active' state:
A. the auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC all feed back 'enter a primary protection state',
B. the timer is set to exceed a preset time period,
and (III) when any condition is met, the power battery jumps from the 'primary protection activation' to the 'non-activation' state:
1) the power mode transmitted by the body area controller is not OFF,
2) the SOC of the power battery is more than or equal to B percent, and the vehicle is in a charging state,
and (IV) when all the following conditions are met simultaneously, the power battery jumps from the inactive state to the secondary protection standby state:
1) the power mode transmitted by the body area controller is OFF,
2) the SOC of the power battery is less than or equal to A percent, or the SOC of the power battery is between A percent and B percent and the SOC of the storage battery is less than C percent,
3) the vehicle is in an uncharged state and,
(V) when one of the following two conditions A, B occurs, the power battery jumps from the 'secondary protection standby' state to the 'secondary protection active' state:
A. the auxiliary driving domain controller, the vehicle body domain controller, the HMI and the DCDC all feed back 'enter a secondary protection state',
B. the timer is set to exceed a preset time period,
and (VI) when any condition is met, the power battery jumps from the 'secondary protection activation' to the 'non-activation' state:
1) the power mode transmitted by the body area controller is not OFF,
2) the SOC of the power battery is more than or equal to B percent, and the vehicle is in a charging state,
and (seventhly) when the power battery is in a 'primary protection standby' state, if the SOC of the storage battery is less than C%, the battery jumps from the 'primary protection standby' state to a 'secondary protection standby' state.
2. The new energy automobile battery protection mode control method according to claim 1, characterized in that:
when the power battery jumps from the inactive state to the primary protection standby state:
1) the power domain controller disables the remote air conditioner and the remote seat heating function,
2) the auxiliary driving domain controller disables the sentinel mode, remotely drives, remotely parks and automatically replaces the functions of parking,
3) the body area controller forbids the functions of a central control door lock and a welcome system,
4) the HMI pushes the 1), 2) and 3) function disabling notification to the mobile phone end,
5) the DCDC reduces the frequency of detecting the low-voltage battery SOC.
3. The new energy automobile battery protection mode control method according to claim 1, characterized in that:
when the power battery jumps from 'primary protection standby' to 'primary protection activated' state, the power domain controller, the auxiliary driving domain controller, the vehicle body domain controller and the DCDC response all enter a dormant state.
4. The new energy automobile battery protection mode control method according to claim 1, characterized in that:
when the power battery jumps from the 'primary protection activation' to the 'non-activation' state:
1) the power domain controller removes the forbidding of the remote air conditioner and the remote seat heating,
2) the auxiliary driving domain controller removes the forbidding of sentinel model, remote driving, remote parking and automatic passenger-replacing parking,
3) the vehicle body domain controller releases the forbidding of the central control door lock and the welcome system,
4) the HMI pushes a disablement notification to the mobile phone end,
5) the DCDC recovery detects the frequency of the battery SOC.
5. The new energy automobile battery protection mode control method according to claim 1, characterized in that:
when the power battery jumps from the inactive state to the secondary protection standby state:
1) the power domain controller disables the remote air conditioner and the remote seat heating function,
2) the auxiliary driving domain controller disables the sentinel mode, remotely drives, remotely parks and automatically replaces the functions of parking,
3) the body area controller forbids the functions of a central control door lock and a welcome system,
4) the HMI pushes a forbidden notice to the mobile phone end and then enters deep sleep,
5) the DCDC is disabled.
6. The new energy automobile battery protection mode control method according to claim 1, characterized in that:
when the power battery jumps from the 'secondary protection standby' to the 'secondary protection activated' state:
1) the power domain controller, the auxiliary driving domain controller, the vehicle body domain controller and the DCDC all enter a dormant state,
2) the HMI enters a deep sleep state.
7. The new energy automobile battery protection mode control method according to claim 1, characterized in that:
when the power battery jumps from the 'secondary protection activation' to the 'non-activation' state:
1) the power domain controller removes the forbidding of the remote air conditioner and the remote seat heating,
2) the auxiliary driving domain controller removes the forbidding of sentinel model, remote driving, remote parking and automatic passenger-replacing parking,
3) the vehicle body domain controller releases the forbidding of the central control door lock and the welcome system,
4) the HMI pushes a disablement notification to the mobile phone end,
5) the DCDC recovery detects the frequency of the battery SOC.
8. The new energy automobile battery protection mode control method according to claim 1, characterized in that:
when the power battery jumps from the 'primary protection standby' to the 'secondary protection standby' state:
1) the power domain controller disables the remote air conditioner and the remote seat heating function,
2) the auxiliary driving domain controller disables the sentinel mode, remotely drives, remotely parks and automatically replaces the functions of parking,
3) the body area controller forbids the functions of a central control door lock and a welcome system,
4) the HMI pushes a forbidden notice to the mobile phone end and then enters deep sleep,
5) the DCDC is disabled.
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