CN108297722B - Automobile power supply wake-up dormancy control method - Google Patents
Automobile power supply wake-up dormancy control method Download PDFInfo
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- CN108297722B CN108297722B CN201810022555.4A CN201810022555A CN108297722B CN 108297722 B CN108297722 B CN 108297722B CN 201810022555 A CN201810022555 A CN 201810022555A CN 108297722 B CN108297722 B CN 108297722B
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/80—Exchanging energy storage elements, e.g. removable batteries
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Transportation (AREA)
- Mechanical Engineering (AREA)
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Mobile Radio Communication Systems (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a method for controlling a power supply awakening dormancy of an automobile, which comprises the following steps: a step for waking up the vehicle-mounted ECU; the step of waking up the BMS main controller and controlling the quick-change battery pack to supply power to the automobile; and a step for performing sleep control on the vehicle-mounted ECU and the BMS main controller. Has the advantages that: through two-stage awakening, the vehicle-mounted ECU, the BMS main controller and the quick-change battery pack are detected respectively, and the quick-change battery pack is automatically supplied to the automobile, so that the safety and the reliability are realized. In the power supply process, the frequency points are mutually independent, so that the interference is prevented, and the independence is strong. The power supply control process does not need artificial control, and real-time data acquisition, safety and reliability are realized in the power supply process. When the automobile enters the dormant state, data acquisition is realized, the standby power supply is charged again, the dormant time is prolonged, and the defect that the automobile cannot be started after being dormant is overcome.
Description
Technical Field
The invention relates to the technical field of new energy rechargeable batteries, in particular to a control method for awakening dormancy during automobile power supply.
Background
New energy vehicles, especially pure electric vehicles, have become a hot spot for the development of the automobile industry, and the existing pure electric vehicles all adopt power batteries as power sources. The existing pure electric automobile is mainly divided into a plug-in type and a quick-change type based on different charging modes.
The plug-in type pure electric vehicle has limited driving range due to the limited number of power batteries, and when the pure electric vehicle needs to run for a long distance, the pure electric vehicle must be charged for many times along the way. However, the existing plug-in type pure electric vehicle generally consumes more than one hour when being fully charged at one time, and the problem of low charging efficiency cannot be solved in time, so that a lot of inconvenience is brought to a driver, and the problem becomes a key factor for restricting popularization and use of the pure electric vehicle.
In order to solve the above problems, it is necessary to provide a quick-change battery pack to achieve quick battery change, and to provide an intelligent wake-up system for waking up the battery pack.
Disclosure of Invention
In order to solve the problems, the invention provides a control method for awakening dormancy of automobile power supply, which adopts a two-stage awakening mode to control power supply of a quick-change battery pack, is intelligent, reliable, simple and convenient, and has two-stage awakening, high system reliability and more stable power supply.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a power supply wake-up dormancy control method for an automobile is characterized by comprising the following steps:
a step for waking up the vehicle-mounted ECU;
the step of waking up the BMS main controller and controlling the quick-change battery pack to supply power to the automobile;
and a step for performing sleep control on the vehicle-mounted ECU and the BMS main controller.
Through awakening up in proper order on-vehicle ECU, BMS main control unit, realize that the quick change battery package supplies power to the car. Awakening through the two stages, self-checking is carried out on the vehicle-mounted ECU and the BMS main controller before power supply is achieved, and power supply reliability is improved. Awakening process intelligence is convenient, and whole awakening time is short, realizes quick power supply, and BMS main control unit can discern the identity information of quick change battery package, improves the power supply reliability, avoids the power supply mistake.
Further, the step for waking up the vehicle-mounted ECU specifically includes:
s11: the method comprises the steps that a vehicle-mounted ECU acquires a power supply starting signal detected by an automobile starting detector;
s12: the vehicle-mounted ECU verifies the power supply starting signal; if the verification is passed, the flow proceeds to step S13; if the verification fails, the process returns to step S11;
s13: starting ECU self-checking by the vehicle-mounted ECU;
s14: if the ECU is qualified, the vehicle-mounted ECU sends a BMS awakening signal to the BMS main controller; and if the ECU is not qualified in self-inspection, reporting an error.
The ECU self-checking content at least comprises the running conditions of an ECU running system, running current, running voltage, a whole vehicle controller and a communication system.
And the vehicle-mounted ECU is connected with the BMS main controller through a CAN bus.
Further describing, the step of waking up the BMS host controller and controlling the quick-change battery pack to supply power specifically includes:
s21: the BMS main controller acquires a BMS awakening signal sent by the vehicle-mounted ECU;
s22: the BMS main controller starts BMS self-checking; the BMS self-checking is passed, the step S23 is carried out, and if not, an error is reported;
s23: the BMS main controller randomly sends frequency points to the quick-change battery pack to realize wireless communication connection;
s24: identity information is checked between the BMS main controller and the quick-change battery pack, and the automobile is normally powered by the quick-change battery pack.
The BMS self-test at least comprises wireless communication detection and BMS controller operation detection. The BMS wake-up signal may be a data signal or an electrical signal.
Through awakening up BMS main controller, the communication between BMS main controller and quick-change battery pack is established, and the quick-change battery pack is controlled to supply power to the automobile. The intelligent detection system is convenient to use, does not need manual operation, and achieves automatic detection and intelligent power supply.
Further, in step S23, the specific steps of the BMS host controller randomly sending the frequency point to the quick-change battery pack to achieve the wireless communication connection include:
s230: establishing a background frequency point database, wherein M frequency points, the transmitting power limit values and the frequency point capacity limit values of all the frequency points are arranged in the frequency point database; the frequency dereferencing frequency bands of the M frequency points are as follows: f 1-f 2, wherein the resolution of M frequency points is k;
s231: the BMS main controller calls m frequency points from the frequency point database, and the m frequency points are used as candidate frequency points for establishing communication connection between the BMS main controller and the quick-change battery pack;
s232: the BMS main controller acquires the electric connection state of a connecting unit between the automobile and the quick-change battery pack; if the connection state is established, go to step S233; otherwise, returning to the step S232;
at the moment, the connecting unit is in an electric connection state, but the quick-change battery pack does not supply power to the automobile, and only the power supply line is in lap joint.
S233: the BMS main controller randomly extracts a frequency point from the m frequency points according to a pseudo-random code mechanism;
s234: the BMS main controller distributes the extracted frequency points to the corresponding quick-change battery packs, and wireless communication connection between the BMS main controller and the quick-change battery packs is established, so that battery pack data interaction is realized.
Wherein M is more than or equal to M, and M and M are positive integers.
Numbering the M frequency points in sequence: x is the number of1,x2,x3,…,xM. Its intermediate frequency point number x1The corresponding frequency point is f1, the frequency point number x2The corresponding frequency point is f1+ k … ….
The frequency point database is connected with on-vehicle ECU, and on-vehicle ECU is connected with BMS main control unit, and the m frequency points that arbitrary BMS main control unit transferred are all inequality, and the frequency point that makes each car transfer of random transfer is inconsistent, has strengthened each car frequency point independence.
The battery pack data at least comprises the operation temperature, the voltage and the current of each electric core and the temperature of the quick-change battery pack battery electric cabinet.
To be further described, in step S230, each frequency point corresponds to a frequency point number;
in step S231; m frequency points correspond to m frequency point numbers;
in step S233, the BMS host controller randomly extracts a specific content of a frequency point according to the pseudo random code mechanism as follows: a pseudo-random code mechanism is adopted to randomly extract one frequency point number from m frequency point numbers; and obtaining the corresponding frequency point according to the frequency point number.
Random extraction of frequency points is realized, communication frequency points are different, special frequency point data interaction is realized, power supply communication independence between automobiles is improved, and mutual interference is avoided.
Further describing, the step S24 of checking the identity information of the quick-change battery pack by the BMS host controller to realize that the quick-change battery pack supplies power to the vehicle includes:
s241: the BMS main controller sends automobile power supply verification information to the quick-change battery pack;
s242: the BMS main controller acquires the proofreading information of the quick-change battery pack;
the verification information is information for verifying automobile power supply verification information and label identity information by using a quick-change battery pack, the label identity information is information read by an RFID read-write module from an RFID label, the RFID read-write module is arranged on the quick-change battery pack, and the RFID label is arranged on an automobile body;
s243: the BMS main controller acquires battery pack self-checking information of the quick-change battery pack; if the self-check information of the battery pack is normal, the step S244 is performed; otherwise, returning to step S243;
s244: and the BMS main controller sends power supply information to the quick-change battery pack to control the quick-change battery pack to supply power to the automobile.
Realize carrying out identity information proofreading between BMS main control unit and the quick change battery package, not only BMS main control unit can acquire the identity information of quick change battery package, and the quick change battery package can also acquire BMS main control unit's identity information, realizes two-way verification, avoids the power supply to take place the mistake, and the good reliability.
Further, the RFID read-write module in step S242 is disposed on a quick-change connector of the vehicle, the RFID tag is disposed in a battery electric cabinet of the quick-change battery pack, and a power supply connector is disposed on a side wall of the battery electric cabinet;
the quick-change connector and the power supply connector form a connecting unit;
when the quick-change connector and the power supply connector are in a connected state, the RFID reading and writing module is over against the RFID label.
The connecting unit is connected, the RFID reading and writing module is right opposite to the RFID label, the RFID data reading is adopted, short-distance information reading is achieved, and the RFID reading and writing module is prevented from mistakenly recognizing the long-distance RFID label.
Further, the steps for performing sleep control on the vehicle-mounted ECU and the BMS main controller are specifically:
s31: the method comprises the steps that a vehicle-mounted ECU acquires a sleep signal detected by an automobile starting detector;
s32: detecting standby power supply information of a standby power supply by a vehicle-mounted ECU; if the standby power information is normal, go to step S33; otherwise, returning to report error;
s33: the vehicle-mounted ECU starts sleep control countdown;
s34: the vehicle-mounted ECU acquires current battery pack data received by the BMS main controller and uploads the current battery pack data to a battery database;
s35: when the power-off countdown time is up and the battery pack data is uploaded, the vehicle-mounted ECU sends a dormancy control signal to control the quick-change battery pack to be switched to a dormancy power supply state.
The sleep control countdown time can be set arbitrarily and is generally 5-20 minutes. And before entering the dormancy power supply state, the quick change battery package can charge to stand-by power supply again, guarantees the longest dormancy time. Preventing the vehicle from being disabled. The standby power supply information at least comprises the electric quantity, the power supply current and the power supply voltage of the standby power supply.
Further describing, the backup power source in step S32 is either 12V or the battery power source is started; or a spare electric core power supply;
when the standby power supply is a 12V starting battery power supply, the dormant power supply current is lower than 2 mA;
when the standby power supply is a standby battery cell power supply, the dormancy supply current is lower than 1 mA; the power supply voltage of any battery cell in the spare battery cell power supply is lower than 3.15V.
Still further, the car start detector in step S11 is either a wireless transceiver, a key shift detector, a fingerprint detector, a face recognition detector, an iris recognizer, an image recognition detector, or a voice recognition detector;
the power supply starting signal is a wireless starting signal, a key starting signal, a fingerprint starting signal, a human face starting signal, an iris starting signal, an image starting signal or a voice starting signal;
the dormancy signal is either a wireless dormancy signal, a key dormancy signal, a fingerprint dormancy signal, a face dormancy signal, an iris dormancy signal, an image dormancy signal or a voice dormancy signal.
The wireless transceiver may be a WiFi, mobile signal, bluetooth, radio frequency, RFID, ultrasonic, radar, or other transceiver.
The multi-mode triggering awakening control is achieved, and the intelligent and convenient effects are achieved.
The invention has the beneficial effects that: through two-stage awakening, the vehicle-mounted ECU, the BMS main controller and the quick-change battery pack are detected respectively, and the quick-change battery pack is automatically supplied to the automobile, so that the safety and the reliability are realized. In the power supply process, the frequency points are mutually independent, so that the interference is prevented, and the independence is strong. The power supply control process does not need artificial control, and real-time data acquisition, safety and reliability are realized in the power supply process. When the automobile enters the dormant state, data acquisition is realized, the standby power supply is charged again, the dormant time is prolonged, and the defect that the automobile cannot be started after being dormant is overcome. The whole process is intelligent, safe, good in reliability and strong in independence.
Drawings
FIG. 1 is a block diagram of the system architecture of the present invention;
FIG. 2 is a vehicle ECU wakeup flow diagram of the present invention;
fig. 3 is a BMS host controller wake-up flow diagram of the present invention;
fig. 4 is a flow chart illustrating the wireless communication connection between the BMS host controller and the quick-change battery pack according to the present invention;
fig. 5 is a flowchart illustrating the BMS host controller of the present invention checking the identity information of the quick-change battery pack;
fig. 6 is a flowchart of the sleep control of the vehicle according to the present invention.
Detailed Description
The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.
A power supply wake-up dormancy control method for a vehicle comprises the steps of waking up a vehicle-mounted ECU 1; the step of waking up the BMS main controller 2 and controlling the quick-change battery pack 3 to supply power to the automobile; and a step for performing sleep control on the in-vehicle ECU1 and the BMS main controller 2.
With reference to fig. 1 and 2, the steps for waking up the vehicle-mounted ECU1 are as follows:
s11: the vehicle-mounted ECU1 acquires a power supply starting signal detected by the automobile starting detector 4;
s12: the vehicle-mounted ECU1 verifies the power supply start signal; if the verification is passed, the flow proceeds to step S13; if the verification fails, the process returns to step S11;
s13: the in-vehicle ECU1 starts ECU self-check;
s14: if the ECU self-test is qualified, the vehicle-mounted ECU1 sends a BMS awakening signal to the BMS main controller 2; and if the ECU is not qualified in self-inspection, reporting an error.
Wherein, combine fig. 1 and fig. 3 for awakening BMS main controller 2, the step of controlling quick change battery package 3 to supply power specifically is:
s21: the BMS main controller 2 acquires a BMS awakening signal sent by the vehicle-mounted ECU 1;
s22: the BMS main controller 2 starts BMS self-checking; the BMS self-checking is passed, the step S23 is carried out, and if not, an error is reported;
s23: the BMS main controller 2 randomly sends frequency points to the quick-change battery pack 3 to realize wireless communication connection; with reference to fig. 4, the specific steps are as follows:
s230: establishing a background frequency point database 5a, wherein M frequency points, emission power limit values and frequency point capacity limit values of all the frequency points are arranged in the frequency point database 5 a; the frequency dereferencing frequency bands of the M frequency points are as follows: f 1-f 2, wherein the resolution of M frequency points is k;
s231: the BMS main controller 2 calls m frequency points from the frequency point database 5a, and the m frequency points are used as candidate frequency points for establishing communication connection between the BMS main controller 2 and the quick-change battery pack 3;
s232: the BMS main controller 2 acquires the electric connection state of a connecting unit 6 between the automobile and the quick-change battery pack 3; if the connection state is established, go to step S233; otherwise, returning to the step S232;
s233: the BMS main controller 2 randomly extracts a frequency point from the m frequency points according to a pseudo-random code mechanism;
s234: the BMS main controller 2 distributes the extracted frequency points to the corresponding quick-change battery packs 3, and wireless communication connection between the BMS main controller 2 and the quick-change battery packs 3 is established, so that battery pack data interaction is realized.
In step S230, each frequency point corresponds to a frequency point number;
in step S231; m frequency points correspond to m frequency point numbers;
in step S233, the BMS host controller 2 randomly extracts a specific content of a frequency point according to the pseudo random code mechanism as follows: a pseudo-random code mechanism is adopted to randomly extract one frequency point number from m frequency point numbers; and obtaining the corresponding frequency point according to the frequency point number. ,
in the present embodiment, M is 80; the emission power limit value of the frequency point is as follows: r.p. 50 mWe; frequency tolerance: 100X 10-6 Hz. The resolution of the frequency point is k equal to 0.5.
Wherein, the numbering of 80 frequency point numbers is respectively: 120,121,122,123,124 … … 200, respectively.
In this embodiment, let the frequency point number xiThe relation between the frequency point F and the frequency point is as follows:
s24: identity information is checked between the BMS main controller 2 and the quick-change battery pack 3, and normal power supply of the automobile by the quick-change battery pack 3 is realized. As can be seen from fig. 5, the specific steps are as follows:
s241: the BMS main controller 2 sends automobile power supply verification information to the quick-change battery pack 3;
s242: the BMS main controller 2 acquires the proofreading information of the quick-change battery pack 3;
the verification information is information for verifying the power supply verification information and the tag identity information of the automobile by the quick-change battery pack 3, the tag identity information is information read by the RFID read-write module 7B from the RFID tag 7A, the RFID read-write module 7B is arranged on the quick-change battery pack 3, and the RFID tag 7A is arranged on the automobile body;
s243: the BMS main controller 2 acquires the battery pack self-checking information of the quick-change battery pack 3; if the self-check information of the battery pack is normal, the step S244 is performed; otherwise, returning to step S243;
s244: the BMS main controller 2 sends power supply information to the quick-change battery pack 3 and controls the quick-change battery pack 3 to supply power to the automobile.
The RFID read-write module 7B in step S242 is disposed on a quick-change connector of the vehicle, the RFID tag 7A is disposed in a battery electric cabinet of the quick-change battery pack 3, and a power supply connector is disposed on one side wall of the battery electric cabinet;
the quick-change connector and the power supply connector form a connecting unit 6;
when the quick-change connector and the power supply connector are in a connected state, the RFID reading and writing module 7B is over against the RFID label 7A.
With reference to fig. 1 and 6, the steps for performing sleep control on the vehicle-mounted ECU1 and the BMS main controller 2 are specifically:
s31: the vehicle-mounted ECU1 acquires a sleep signal detected by the automobile start detector 4;
s32: the in-vehicle ECU1 detects backup power supply information of the backup power supply 8; if the standby power information is normal, go to step S33; otherwise, returning to report error;
s33: the in-vehicle ECU1 starts the sleep control countdown;
s34: the vehicle-mounted ECU1 acquires the current battery pack data received by the BMS main controller 2 and uploads the current battery pack data to the battery database 5 b;
s35: when the power-off countdown time is up and the battery pack data is uploaded, the vehicle-mounted ECU1 sends a sleep control signal to control the quick-change battery pack 3 to be switched to a sleep power supply state.
In the present embodiment, the backup power supply 8 in step S32 is a 12V starting battery power supply with a sleep supply current lower than 2 mA.
In this embodiment, the vehicle start detector 4 in step S11 is a key shift position detector, the power supply start signal is a key start signal, and the sleep signal is a key sleep signal.
When the key position is ON, the key position detector detects a power supply start signal.
When the key position is OFF, the key position detector detects a sleep signal.
It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. A power supply wake-up dormancy control method for an automobile is characterized by comprising the following steps:
a step for waking up the on-vehicle ECU (1);
the steps for waking up the vehicle-mounted ECU (1) are as follows:
s11: the method comprises the following steps that a vehicle-mounted ECU (1) acquires a power supply starting signal detected by an automobile starting detector (4);
s12: the vehicle-mounted ECU (1) verifies the power supply starting signal; if the verification is passed, the flow proceeds to step S13; if the verification fails, the process returns to step S11;
s13: the vehicle-mounted ECU (1) starts ECU self-checking;
s14: if the ECU is qualified, the vehicle-mounted ECU (1) sends a BMS awakening signal to the BMS main controller (2); if the ECU is not qualified in self-inspection, an error is reported;
the step of waking up the BMS main controller (2) and controlling the quick-change battery pack (3) to supply power to the automobile;
a step for performing sleep control on the vehicle-mounted ECU (1) and the BMS main controller (2);
the steps for performing sleep control on the vehicle-mounted ECU (1) and the BMS main controller (2) are as follows:
s31: the method comprises the following steps that a vehicle-mounted ECU (1) acquires a sleep signal detected by an automobile starting detector (4);
s32: the vehicle-mounted ECU (1) detects the standby power supply information of the standby power supply (8); if the standby power information is normal, go to step S33; otherwise, returning to report error;
s33: the vehicle-mounted ECU (1) starts sleep control countdown;
s34: the vehicle-mounted ECU (1) acquires current battery pack data received by the BMS main controller (2) and uploads the current battery pack data to a battery database (5 b);
s35: when the power failure countdown time is up and the battery pack data is uploaded, the vehicle-mounted ECU (1) sends a dormancy control signal to control the quick-change battery pack (3) to be switched to a dormancy power supply state.
2. The automobile power supply wake-up sleep control method according to claim 1, wherein the step of waking up the BMS host controller (2) and controlling the quick-change battery pack (3) to supply power specifically comprises:
s21: the BMS main controller (2) acquires a BMS awakening signal sent by the vehicle-mounted ECU (1);
s22: the BMS main controller (2) starts BMS self-checking; the BMS self-checking is passed, the step S23 is carried out, and if not, an error is reported;
s23: the BMS main controller (2) randomly sends frequency points to the quick-change battery pack (3) to realize wireless communication connection;
s24: identity information is checked between the BMS main controller (2) and the quick-change battery pack (3), and normal power supply of the automobile by the quick-change battery pack (3) is realized.
3. The automobile power supply wake-up sleep control method according to claim 2, wherein the specific steps of the BMS host controller (2) randomly sending the frequency point to the quick-change battery pack (3) to realize the wireless communication connection in step S23 are as follows:
s230: establishing a background frequency point database (5a), wherein M frequency points, the transmitting power limit values and the frequency point capacity limit values of all the frequency points are arranged in the frequency point database (5 a); the frequency dereferencing frequency bands of the M frequency points are as follows: f 1-f 2, wherein the resolution of M frequency points is k;
s231: the BMS main controller (2) calls m frequency points from the frequency point database (5a), and the m frequency points are used as candidate frequency points for establishing communication connection between the BMS main controller (2) and the quick-change battery pack (3);
s232: the BMS main controller (2) acquires the electric connection state of a connecting unit (6) between the automobile and the quick-change battery pack (3); if the connection state is established, go to step S233; otherwise, returning to the step S232;
s233: the BMS main controller (2) randomly extracts one frequency point from the m frequency points according to a pseudo-random code mechanism;
s234: the BMS main controller (2) distributes the extracted frequency points to the corresponding quick-change battery packs (3), and wireless communication connection between the BMS main controller (2) and the quick-change battery packs (3) is established, so that battery pack data interaction is realized.
4. The automobile power supply wake-up sleep control method according to claim 3, wherein in step S230, each frequency point corresponds to a frequency point number;
in step S231; m frequency points correspond to m frequency point numbers;
in step S233, the BMS host controller (2) randomly extracts a specific content of a frequency point according to a pseudo random code mechanism as follows: a pseudo-random code mechanism is adopted to randomly extract one frequency point number from m frequency point numbers; and obtaining the corresponding frequency point according to the frequency point number.
5. The automobile power supply wake-up sleep control method according to claim 2, wherein the BMS host controller (2) in step S24 checks the identity information of the quick-change battery pack (3), and the step of supplying power to the automobile by the quick-change battery pack (3) is:
s241: the BMS main controller (2) sends automobile power supply verification information to the quick-change battery pack (3);
s242: the BMS main controller (2) acquires the proofreading information of the quick-change battery pack (3);
the verification information is information for verifying automobile power supply verification information and label identity information by a quick-change battery pack (3), the label identity information is information read by an RFID read-write module (7B) from an RFID label (7A), the RFID read-write module (7B) is arranged on the quick-change battery pack (3), and the RFID label (7A) is arranged on an automobile body;
s243: the BMS main controller (2) acquires the self-checking information of the battery pack of the quick-change battery pack (3); if the self-check information of the battery pack is normal, the step S244 is performed; otherwise, returning to step S243;
s244: the BMS main controller (2) sends power supply information to the quick-change battery pack (3) to control the quick-change battery pack (3) to supply power to the automobile.
6. The automobile power supply wake-up sleep control method according to claim 5, characterized in that the RFID read-write module (7B) in step S242 is arranged on a quick-change connector of an automobile, the RFID tag (7A) is arranged in a battery electric cabinet of the quick-change battery pack (3), and a power supply connector is arranged on one side wall of the battery electric cabinet;
the quick-change connector and the power supply connector form a connecting unit (6);
when the quick-change connector and the power supply connector are in a connected state, the RFID reading and writing module (7B) is over against the RFID label (7A).
7. The vehicle powered wake-up sleep control method according to claim 1, characterized in that the backup power supply (8) in step S32 is a 12V starting battery power supply; or a spare electric core power supply;
when the standby power supply (8) is a 12V starting battery power supply, the dormant power supply current is lower than 2 mA;
when the standby power supply (8) is a standby battery cell power supply, the dormancy supply current is lower than 1 mA; the power supply voltage of any battery cell in the spare battery cell power supply is lower than 3.15V.
8. The car power wake-up sleep control method according to claim 1, characterized in that the car start detector (4) in step S11 is either a wireless transceiver, a key shift detector, a fingerprint detector, a human face recognition detector, an iris recognizer, an image recognition detector, or a voice recognition detector;
the power supply starting signal is a wireless starting signal, a key starting signal, a fingerprint starting signal, a human face starting signal, an iris starting signal, an image starting signal or a voice starting signal;
the dormancy signal is either a wireless dormancy signal, a key dormancy signal, a fingerprint dormancy signal, a face dormancy signal, an iris dormancy signal, an image dormancy signal or a voice dormancy signal.
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| CN114103725A (en) * | 2020-08-31 | 2022-03-01 | 帝亚一维新能源汽车有限公司 | Method for remotely identifying replacement state of battery pack of power battery system |
| CN115709668B (en) * | 2022-11-02 | 2024-06-18 | 中国第一汽车股份有限公司 | Battery state monitoring method and system |
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