CN113472885B - Remote preheating control method and system for battery pack - Google Patents
Remote preheating control method and system for battery pack Download PDFInfo
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- 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
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
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Abstract
The invention relates to a battery pack remote preheating control system and a control method, wherein a user sets a driving plan and a battery preheating setting; calculating the appointment waiting time according to the trip planning time and the estimated battery heating time, when the timing end time is reached, waking up nodes such as a vehicle controller/a battery management system/DCDC (direct current DC) and the like by a CAN (controller area network) according to a remote battery preheating request sent by a vehicle networking service platform, and controlling a battery pack heating accessory to heat the battery after the high-voltage electrification of the whole vehicle is finished; and after preheating is finished, reminding a user of using the vehicle. According to the remote preheating control method and the remote preheating control system for the battery pack, the appointment setting can be set through the remote terminal, the vehicle is not required to be kept in a high-voltage or low-voltage awakening state, the risks of high-voltage safety accidents and storage battery feeding are avoided, the reasonable preheating temperature of the battery is automatically calculated according to the planned vehicle using time or the planned driving mileage of the travel, the preheating of the battery in two states of gun insertion and non-gun insertion is considered, and unnecessary electric energy waste is avoided.
Description
Technical Field
The invention relates to a control system and a control method of an electric automobile, in particular to a battery pack remote preheating control method and a battery pack remote preheating control system.
Background
In order to reduce the dependence on the traditional fossil energy and realize the energy-saving and emission-reduction strategies of 'carbon peak reaching' and 'carbon neutralization', the electric automobile becomes an important development direction of the automobile industry in the future. In recent years, under the joint efforts of policy support and industry, the technology of electric automobiles has been greatly developed, and the quantity of electric automobiles in China reaches 400 thousands by the end of 2020.
However, the electric automobile still has the problems of serious low-temperature endurance attenuation and limited power, and the popularization of the electric automobile in northern areas is seriously influenced. The low-temperature endurance of the electric automobile is influenced by a plurality of factors. Firstly, the activity of the power battery is reduced in a low-temperature environment, so that the internal resistance of the power battery is increased, and the dischargeable capacity is reduced; secondly, in the running process in winter, the heating requirement of passengers on the passenger compartment is increased, and the power consumption of the whole vehicle is increased due to the fact that the PTC of the air conditioner is started; in addition, the recoverable power of the battery of the electric automobile during the driving process is limited due to low temperature, so that the driving range of the electric automobile is reduced.
The prior art CN 110336088A proposes a battery preheating method available in a slow charging gun insertion state, which requires a user to preset a vehicle using time, a battery demand temperature, and a cockpit demand temperature, and the preheating method of the present invention cannot be used in a non-charging state, and requires the user to preset the battery demand temperature, and in fact, the user may be confused or set an unreasonable battery demand temperature because the user cannot know the characteristics of the battery.
In the prior art, CN 111791757 a provides a battery remote preheating system for a pure electric vehicle, which can only be used in a non-gun insertion state, and cannot control a reasonable battery preheating temperature according to a user trip plan, thereby causing unnecessary energy consumption waste of a battery pack.
In the prior art, CN 210062645U proposes a remote heating control system of a battery heating system and a vehicle, in which a battery management system designs a clock chip powered by an independent power supply, the clock chip is used for performing periodic timing and scheduled heating timing after the vehicle is powered off, and a control circuit is used for controlling a main circuit to start according to the time of the periodic timing, so as to implement power-on control of the battery management system, a vehicle controller and a vehicle-mounted terminal. The disadvantage is the increased cost of the clock chip.
The existing remote preheating system has a plurality of defects:
1) the time of remote heating cannot be reserved, and the user needs to wait for completion of preheating when needing to use the vehicle immediately;
2) the reserved timing process depends on a timing module of a vehicle controller, so that the whole vehicle cannot sleep, and the risk of low-voltage storage battery power feeding is caused;
3) 2 customer use scenes of connecting the slow charging gun and not inserting the slow charging gun cannot be considered;
4) when the battery is remotely preheated under the condition that the slow charging gun is not plugged, if the preheating is completed, a client does not have a trip plan or the running time is too short, unnecessary electric energy waste is caused by the fact that the running time is too short due to battery heating power consumption.
Disclosure of Invention
Aiming at the defects in the prior art, in order to relieve the mileage anxiety of an electric vehicle user in a low-temperature environment, the invention provides the battery pack remote preheating control method and the battery pack remote preheating control system which can reduce the attenuation rate of the winter driving of the electric vehicle, improve the low-temperature driving mileage of the electric vehicle and immediately provide better charge and discharge power characteristics for a power battery after the vehicle is started.
The technical scheme adopted by the invention is as follows:
a remote preheating control system for a battery pack,
the system comprises an intelligent mobile terminal, a vehicle networking service platform (TSP), a vehicle network terminal (TBox), a Vehicle Control Unit (VCU), a Battery Management System (BMS), a vehicle multimedia entertainment host (MP5), a battery pack, a PDU (Power distribution Unit), an OBC (on-Board diagnostics), a cockpit heating accessory, a battery pack heating accessory, a DCDC (direct current controller) and a storage battery;
the intelligent mobile terminal and the MP5 are used for providing a remote appointment heating setting interface and a driving plan inquiry interface and feeding back an appointment state, a battery pack heating state and vehicle using reminding information to a client;
the vehicle networking service platform is used for realizing information interaction forwarding between the intelligent mobile terminal and the vehicle control module through wireless communication, and is used for making an appointment for requirement judgment and making an appointment for background timing of a waiting process;
the vehicle-mounted network terminal is used for forwarding information interaction between the vehicle networking service platform and the vehicle control module and controlling the awakening of the vehicle controller/battery management system/DCDC/OBC;
the vehicle control unit is used for controlling power-on and power-off requests of the high-voltage system according to the vehicle state and controlling the heating accessories of the cockpit to preheat the cockpit;
the battery management system is used for executing high-voltage power-on and power-off control according to a high-voltage power-on and power-off request of the vehicle control unit and controlling a battery pack heating accessory to preheat the battery pack according to a preset battery pack heating requirement;
the OBC is used for judging the insertion state of the slow charging gun and controlling the charging power according to the request of the battery management system in the insertion state of the slow charging gun.
The control method of the battery pack remote preheating control system comprises the following steps:
s1, setting a driving plan and a battery preheating setting by a user;
the user selects whether to start a remote battery preheating mode and a battery preheating target temperature on the vehicle-mounted MP5 or the intelligent mobile terminal (such as a mobile phone APP), and inquires about a trip plan of the user: planned trip time, predicted mileage and travel time;
s2, the car networking service platform estimates the battery heating time, calculates the appointment waiting time according to the trip planning time and the estimated battery heating time, and performs background timing;
s3, when the timing end moment is reached, the vehicle networking service platform remotely wakes up the TBOX;
s4, after the vehicle-mounted network terminal is awakened, according to a remote battery preheating request sent by the Internet of vehicles service platform, the CAN awakens nodes such as a vehicle controller/battery management system/DCDC and the like;
s5, the vehicle controller is awakened to control the vehicle to be powered on at high voltage;
the vehicle controller controls the whole vehicle to be electrified at high voltage according to a remote battery preheating request and a remote high voltage request sent by the TBOX;
s6, after the high-voltage electrification of the whole vehicle is finished, the battery management system controls the battery pack heating accessory to heat the battery according to the set preheating target temperature and the actual temperature of the battery;
s7, the vehicle-mounted network terminal feeds back the preheating state of the battery pack of the battery management system to the intelligent mobile terminal through the vehicle networking service platform; after preheating is finished, reminding a user of using the vehicle;
and S8, the user gets on the vehicle and starts to drive the vehicle.
Preferably, the user driving plan setting and the battery preheating setting comprise the following steps:
s101, a user selects whether to start a remote battery preheating mode on the vehicle-mounted MP5 or the intelligent mobile terminal;
s102, the vehicle MP5 or the intelligent mobile terminal judges whether the ambient temperature is less than a temperature threshold T1 (such as 0 ℃); if yes, go to step S104; if not, the step S103 is executed;
s103, the vehicle MP5 or the intelligent mobile terminal prompts in a text mode that the function is only supported to be started below T1 ℃, and the step S112 is carried out;
s104, the vehicle-mounted MP5 or the intelligent mobile terminal judges whether the vehicle is inserted into the slow charging gun according to the charging gun insertion state signal uploaded by the OBC, if so, the step S105 is executed; if not, go to step S108;
s105, the vehicle-mounted MP5 or the intelligent mobile terminal inquires about a trip plan of the user, wherein the trip plan comprises planned trip time, predicted trip mileage and predicted trip duration;
s106, the vehicle MP5 or the intelligent mobile terminal judges whether the user is a short trip: judging whether the predicted trip mileage is greater than a threshold value S1 km or whether the predicted driving time is greater than a threshold value t1 min, if so, entering step S107; if not, go to step S110;
s107, the vehicle-mounted MP5 or the intelligent mobile terminal successfully sets the remote battery preheating mode, and the remote battery preheating mode is started;
s108, the vehicle-mounted MP5 or the intelligent mobile terminal judges whether the SOC of the battery is greater than a threshold value k, if so, the step S105 is executed; if not, go to step S109;
s109, the vehicle-mounted MP5 or the intelligent mobile terminal prompts that the electric quantity is too low and the slow charging gun is recommended to be plugged and then the vehicle is started, and the step S112 is carried out;
s110, the vehicle MP5 or the intelligent mobile terminal prompts words to remind that the power consumption of the battery is increased and whether the battery is started or not is confirmed when the battery is started and preheated in a short-distance driving mode;
and S111, judging whether the user selects 'confirm on' by the vehicle-mounted MP5 or the intelligent mobile terminal. If yes, go to step S107; if not, go to step S112;
and S112, automatically closing a remote battery preheating mode switch of the vehicle-mounted MP5 or the intelligent mobile terminal. Preferably, the car networking service platform background reservation storage and timing comprises the following steps:
s201, a user sets that the battery is preheated successfully in a remote mode at the intelligent mobile terminal, the intelligent mobile terminal sends reservation information to the Internet of vehicles service platform, and then the step S204 is carried out;
s202, the user sets the battery to be preheated successfully in the vehicle MP5, and the step S203 is carried out;
s203, the vehicle network terminal forwards the reservation information set by the user on the MP5 to the vehicle networking service platform, and then the step S204 is carried out; TBOX and MP5 may enter a sleep state after the vehicle is powered down;
s204, the Internet of vehicles service platform stores the user reservation information;
s205, the car networking service platform looks up a table according to the target battery heating temperature and the environment temperature to estimate the battery heating time t 1;
s206, the vehicle networking service platform performs background timing, and the calculation formula of the timing deadline is as follows:
the timing deadline time is the planned travel time, the estimated battery heating time t1, and the estimated charging time t 0;
and S207, the Internet of vehicles service platform judges whether the timing deadline is reached. If yes, go to step S208; if not, returning to the step S206;
and S208, the vehicle networking service platform completes timing and wakes up the TBOX.
Preferably, the target battery heating temperature is selected by table lookup within a certain temperature range according to the ambient temperature and the driving mileage (or estimated driving time) of the customer, and the table lookup data is derived from a system simulation or real vehicle test result which aims at the lowest energy consumption, as shown in table 1;
the battery heating time is subjected to table lookup according to the environment temperature and the battery heating target temperature, and the table lookup data is derived from real vehicle test data of battery heating, such as table 2;
table 1 table look-up of target battery heating temperatures:
table 2 estimation table of battery heating time t 1:
when the user performs the reserved charging setting in the slow charging gun inserting state, the charging time t0 needs to be estimated, and the calculation method is as follows:
the estimated charging time t0 is the time (charging target SOC — current SOC) for which the current ambient temperature measured SOC is charged from 0 to 100%.
Preferably, the remote battery warm-up control method includes the steps of:
s301, after the TBOX is remotely awakened by the Internet of vehicles service platform, initializing and awakening the vehicle control unit, the battery management system and the DCDC through the CAN; another awakening mode is that the TBOX awakens the vehicle control unit firstly, and then the vehicle control unit awakens the battery management system and the DCDC through closing a low-voltage relay hard wire;
s302, the vehicle control unit judges whether the slow charging gun is inserted according to a charging gun insertion state signal sent by the battery management system; if yes, go to step S304; if not, go to step S303;
s303, controlling the whole vehicle to be powered on at high voltage by the vehicle controller and the battery management system according to the remote high voltage supply request of the TBOX, and entering the step S307 after the high voltage supply is finished;
s304, the vehicle controller and the battery management system control the vehicle to be powered on at high voltage according to the remote charging high voltage request of the TBOX, and the step S305 is executed after the high voltage is powered on;
s305, the battery management system judges whether a charging requirement exists according to the reserved charging setting, if so, the step S306 is executed; if not, entering the step SS 307;
s306, the battery management system controls charging power and heating power of a battery pack heating accessory respectively by combining the charging requirement SOC and the battery heating requirement temperature;
the specific charging and heating strategy can flexibly select a control strategy of heating before charging, or heating after charging, or heating while charging according to the temperature of the battery pack and the actual SOC.
S307, controlling the power of a battery heating accessory by the battery management system according to the battery heating required temperature;
s308, the battery management system judges whether the SOC reaches a charging cut-off SOC; if yes, go to step S309; if not, returning to the step S306;
s309, stopping charging by the battery management system, and proceeding to step S310;
s310, the battery management system judges whether the target battery preheating temperature is reached; if yes, go to step S311; if not, returning to the step S307;
s311, controlling the battery pack heating accessory to stop heating by the battery management system;
s312, the intelligent mobile terminal feeds back a battery pack heating state fed back by the battery management system, and the user is prompted by characters to 'finish battery pack heating and please use a vehicle in time';
and S313, the user gets on the bus, and the process is finished.
Compared with the prior art, the invention has the beneficial effects that:
according to the remote preheating control method and the remote preheating control system for the battery pack, disclosed by the invention, the reasonable battery preheating temperature is automatically calculated according to the vehicle using time or the driving mileage planned by the journey, so that unnecessary energy consumption waste is avoided.
The invention discloses a battery pack remote preheating control method and a control system, which give consideration to battery preheating in two states of gun insertion and gun non-insertion: when a slow charging gun is inserted, the electric energy of a charging pile is used for preheating a vehicle battery, and the charging process of the whole vehicle and the heating process of the battery can be comprehensively controlled by combining the charging requirement of the vehicle; when the slow charging gun is not inserted, whether the preheating requirement can be met or not is judged according to the stroke planning and the SOC state of the battery, and unnecessary electric energy waste is avoided.
According to the remote preheating control method and the remote preheating control system for the battery pack, the appointment setting can be set through the remote terminal or the vehicle-mounted MP5, cloud timing is carried out by the vehicle networking service platform after the setting is finished, a vehicle does not need to be kept in a high-voltage or low-voltage awakening state, and the risks of high-voltage safety accidents and battery feeding are avoided.
Drawings
FIG. 1 is a schematic diagram of a battery pack remote preheating control method and system;
FIG. 2 is a flow chart of a battery remote preheating control method and a battery remote preheating control method of the control system;
FIG. 3 is a flow chart of a remote preheating intelligent mobile terminal setting of a battery pack remote preheating control method and system;
fig. 4 is a TSP background reservation storage and timing control flow chart of the battery pack remote preheating control method and control system;
fig. 5 is a flow chart of the vehicle-mounted power-on and battery heating control of the battery pack remote preheating control method and control system.
Detailed Description
The invention is described in detail below with reference to the figures and examples:
as can be seen in fig. 1-5, a battery pack remote preheating control system,
the system comprises an intelligent mobile terminal, an Internet of vehicles service platform, a vehicle-mounted network terminal, a vehicle control unit, a battery management system, a vehicle-mounted multimedia entertainment host, a battery pack, a power distribution module (PDU), a vehicle-mounted charger (OBC), a cockpit heating accessory, a battery pack heating accessory, a high-voltage direct-current power supply conversion module (DCDC) and a storage battery;
the intelligent mobile terminal and the MP5 are used for providing a remote appointment heating setting interface and feeding back an appointment state, a battery pack heating state and vehicle using reminding information to a client;
the vehicle networking service platform is used for realizing information interaction forwarding between the intelligent mobile terminal and the vehicle control module through wireless communication, and is used for making an appointment for requirement judgment and making an appointment for background timing of a waiting process;
the vehicle-mounted network terminal is used for forwarding information interaction between the vehicle networking service platform and the vehicle control module and controlling the awakening of the vehicle controller/battery management system/DCDC/OBC;
the vehicle control unit is used for controlling power-on and power-off requests of the high-voltage system according to the vehicle state and controlling the heating accessories of the cockpit to preheat the cockpit;
the battery management system is used for executing high-voltage power-on and power-off control according to a high-voltage power-on and power-off request of the vehicle control unit and controlling a battery pack heating accessory to preheat the battery pack according to a preset battery pack heating requirement;
the OBC is used for judging the insertion state of the slow charging gun and controlling the charging power according to the request of the battery management system in the insertion state of the slow charging gun.
The control method of the battery pack remote preheating control system comprises the following steps:
s1, setting a driving plan and a battery preheating setting by a user;
the user selects whether to start a remote battery preheating mode and a battery preheating target temperature on the vehicle-mounted MP5 or the intelligent mobile terminal (such as a mobile phone APP), and inquires about a trip plan of the user: planned trip time, predicted mileage and travel time;
s2, the car networking service platform estimates the battery heating time, calculates the appointment waiting time according to the trip planning time and the estimated battery heating time, and performs background timing;
s3, when the timing end moment is reached, the vehicle networking service platform remotely wakes up the TBOX;
s4, after the vehicle-mounted network terminal is awakened, according to a remote battery preheating request sent by the Internet of vehicles service platform, the CAN awakens nodes such as a vehicle controller/battery management system/DCDC and the like;
s5, the vehicle controller is awakened to control the vehicle to be powered on at high voltage;
the vehicle controller controls the whole vehicle to be electrified at high voltage according to a remote battery preheating request and a remote high voltage request sent by the TBOX;
s6, after the high-voltage electrification of the whole vehicle is finished, the battery management system controls the battery pack heating accessory to heat the battery according to the set preheating target temperature and the actual temperature of the battery;
s7, the vehicle network terminal feeds back the preheating state of the battery pack of the battery management system to the intelligent mobile terminal (mobile phone APP) through the vehicle networking service platform; after preheating is finished, reminding a user of using the vehicle;
and S8, the user gets on the vehicle and starts to drive the vehicle.
The control flow of the user driving plan setting and the battery preheating setting is shown in fig. 3, and the method comprises the following steps:
s101, a user selects whether to start a remote battery preheating mode on a vehicle-mounted MP5 or an intelligent mobile terminal (such as a mobile phone APP);
s102, the vehicle MP5 or the intelligent mobile terminal judges whether the ambient temperature is less than a temperature threshold T1 (such as 0 ℃); if yes, go to step S104; if not, the step S103 is executed;
s103, the vehicle MP5 or the intelligent mobile terminal prompts in a text mode that the function is only supported to be started below T1 ℃, and the step S112 is carried out;
s104, the vehicle-mounted MP5 or the intelligent mobile terminal judges whether the vehicle is inserted into the slow charging gun according to the charging gun insertion state signal uploaded by the OBC, if so, the step S105 is executed; if not, go to step S108;
s105, the vehicle-mounted MP5 or the intelligent mobile terminal inquires about a trip plan of the user, wherein the trip plan comprises planned trip time, predicted trip mileage and predicted trip duration;
s106, the vehicle MP5 or the intelligent mobile terminal judges whether the user is a short trip: judging whether the predicted trip mileage is greater than a threshold value S1 km or whether the predicted driving time is greater than a threshold value t1 min, if so, entering step S107; if not, go to step S110; for example, the mileage threshold S1 is 35km, the driving time threshold t1 is 30min, and if the planned driving mileage set by the user is 25km, the process proceeds to step S110.
S107, the vehicle-mounted MP5 or the intelligent mobile terminal successfully sets the remote battery preheating mode, and the remote battery preheating mode is started;
s108, the vehicle-mounted MP5 or the intelligent mobile terminal judges whether the SOC of the battery is greater than a threshold value k, if so, the step S105 is executed; if not, go to step S109; for example, if the set battery SOC threshold k is 30%, if the current battery SOC is 25%, the process proceeds to step S109;
s109, the vehicle-mounted MP5 or the intelligent mobile terminal prompts that the electric quantity is too low and the slow charging gun is recommended to be plugged and then the vehicle is started, and the step S112 is carried out;
s110, the vehicle MP5 or the intelligent mobile terminal prompts words to remind that the power consumption of the battery is increased and whether the battery is started or not is confirmed when the battery is started and preheated in a short-distance driving mode;
and S111, judging whether the user selects 'confirm on' by the vehicle-mounted MP5 or the intelligent mobile terminal. If yes, go to step S107; if not, go to step S112;
and S112, automatically closing a remote battery preheating mode switch of the vehicle-mounted MP5 or the intelligent mobile terminal.
The control flow of the car networking service platform background reservation storage and timing is shown in fig. 4, and the control flow comprises the following steps:
s201, a user sets that the battery is preheated successfully in a remote mode at the intelligent mobile terminal, the intelligent mobile terminal sends reservation information to the Internet of vehicles service platform, and then the step S204 is carried out;
s202, the user sets the battery to be preheated successfully in the vehicle MP5, and the step S203 is carried out;
s203, the vehicle network terminal forwards the reservation information set by the user on the MP5 to the vehicle networking service platform, and then the step S204 is carried out; TBOX and MP5 may enter a sleep state after the vehicle is powered down;
s204, the Internet of vehicles service platform stores the user reservation information;
s205, the car networking service platform looks up a table according to the target battery heating temperature and the environment temperature to estimate the battery heating time t 1;
s206, the vehicle networking service platform performs background timing, and the calculation formula of the timing deadline is as follows:
the timing deadline time is the planned travel time, the estimated battery heating time t1, and the estimated charging time t 0; for example, the planned travel time is 7 a.m.: 00, the estimated battery heating time is 20min, the estimated charging time is 6h, the timing deadline is 0: 40;
and S207, the Internet of vehicles service platform judges whether the timing deadline is reached. If yes, go to step S208; if not, returning to the step S206;
and S208, the vehicle networking service platform completes timing and wakes up the TBOX.
The heating temperature of the target battery is selected by table lookup within a certain temperature range according to the ambient temperature and the driving mileage (or estimated driving time) of a customer, and the table lookup data is derived from a system simulation or real vehicle test result which aims at the lowest energy consumption, such as table 1; assuming that the driving distance set by the customer driving plan is 80km, and the current ambient temperature is-10 ℃, the battery heating target temperature is 10 ℃.
The battery heating time is subjected to table lookup according to the environment temperature and the battery heating target temperature, and the table lookup data is derived from real vehicle test data of battery heating, such as table 2; if the heating temperature of the target battery is 10 ℃, the ambient temperature is-10 ℃, and the corresponding battery heating time of the table lookup is 20 min;
table 1 table look-up of target battery heating temperatures:
table 2 estimation table of battery heating time t 1:
when the user performs the reserved charging setting in the slow charging gun inserting state, the charging time t0 needs to be estimated, and the calculation method is as follows:
the estimated charging time t0 is the time (charging target SOC — current SOC) for which the current ambient temperature measured SOC is charged from 0 to 100%. For example, assuming that the time for actually measuring the SOC of the battery from 0 to 100% at the current ambient temperature of-10 ℃ is 12h, the target SOC of the battery is 80%, and the current SOC is 30%, the estimated charging time is 6 h.
The detailed control flow of the steps S3-S7 of the remote battery preheating control method is shown in FIG. 4, and the method comprises the following steps:
s301, after the TBOX is remotely awakened by the Internet of vehicles service platform, initializing and awakening the vehicle control unit, the battery management system and the DCDC through the CAN; another awakening mode is that the TBOX awakens the vehicle control unit firstly, and then the vehicle control unit awakens the battery management system and the DCDC through closing a low-voltage relay hard wire;
s302, the vehicle control unit judges whether the slow charging gun is inserted according to a charging gun insertion state signal sent by the battery management system; if yes, go to step S304; if not, go to step S303;
s303, controlling the whole vehicle to be powered on at high voltage by the vehicle controller and the battery management system according to the remote high voltage supply request of the TBOX, and entering the step S307 after the high voltage supply is finished;
s304, the vehicle controller and the battery management system control the vehicle to be powered on at high voltage according to the remote charging high voltage request of the TBOX, and the step S305 is executed after the high voltage is powered on;
s305, the battery management system judges whether a charging requirement exists according to the reserved charging setting, if so, the step S306 is executed; if not, entering the step SS 307;
s306, the battery management system controls charging power and heating power of a battery pack heating accessory respectively by combining the charging requirement SOC and the battery heating requirement temperature;
the specific charging and heating strategy can flexibly select a control strategy of heating before charging, or heating after charging, or heating while charging according to the temperature of the battery pack and the actual SOC.
S307, controlling the power of a battery heating accessory by the battery management system according to the battery heating required temperature;
s308, the battery management system judges whether the SOC reaches a charging cut-off SOC; if yes, go to step S309; if not, returning to the step S306;
s309, stopping charging by the battery management system, and proceeding to step S310;
s310, the battery management system judges whether the target battery preheating temperature is reached; if yes, go to step S311; if not, returning to the step S307;
s311, controlling the battery pack heating accessory to stop heating by the battery management system;
s312, the intelligent mobile terminal feeds back a battery pack heating state fed back by the battery management system, and the user is prompted by characters to 'finish battery pack heating and please use a vehicle in time';
and S313, the user gets on the bus, and the process is finished.
According to the remote preheating control method and the remote preheating control system for the battery pack, disclosed by the invention, the reasonable battery preheating temperature is automatically calculated according to the vehicle using time or the driving mileage planned by the journey, so that unnecessary energy consumption waste is avoided.
The invention discloses a battery pack remote preheating control method and a control system, which give consideration to battery preheating in two states of gun insertion and gun non-insertion: when a slow charging gun is inserted, the electric energy of a charging pile is used for preheating a vehicle battery, and the charging process of the whole vehicle and the heating process of the battery can be comprehensively controlled by combining the charging requirement of the vehicle; when the slow charging gun is not inserted, whether the preheating requirement can be met or not is judged according to the stroke planning and the SOC state of the battery, and unnecessary electric energy waste is avoided.
According to the remote preheating control method and the remote preheating control system for the battery pack, the appointment setting can be set through the remote terminal or the vehicle-mounted MP5, cloud timing is carried out by the vehicle networking service platform after the setting is finished, a vehicle does not need to be kept in a high-voltage or low-voltage awakening state, and the risks of high-voltage safety accidents and battery feeding are avoided.
The invention provides a remote battery preheating system which can realize travel planning and battery heating appointment at a remote mobile terminal, and can realize the dormant state of a whole vehicle in the timing process through the background timing of a service platform of the Internet of vehicles, thereby avoiding the risk of low-voltage storage battery feed.
The system can give consideration to the battery preheating use scene of the gun plugging and non-gun plugging states, when the charging gun is not plugged in the vehicle, the system can judge whether the target temperature of battery preheating and battery preheating is allowed or not by combining the environmental temperature, the battery SOC and the travel planning of the vehicle owner so as to avoid unnecessary electric energy waste, realize the effects of preheating the battery and prolonging the driving range of the electric vehicle in the low-temperature environment; when the vehicle is inserted into the charging gun, the system can also judge whether the battery preheating and the target temperature of the battery preheating are needed or not by combining the environment temperature and the travel planning of the vehicle owner, the unnecessary waste of electric energy and charging cost can be avoided, and the reservation charging function can be compatible.
The battery pack remote preheating control method and the battery pack remote preheating control system have the beneficial effects that:
the invention combines the remote preheating requirements of 2 scenes at low temperature, and can realize the following steps:
1) the reasonable battery preheating temperature is automatically calculated according to the planned vehicle using time or the driving mileage, so that unnecessary energy consumption waste is avoided;
2) the battery preheating in two states of inserting the gun and not inserting the gun is considered: when a slow charging gun is inserted, the electric energy of a charging pile is used for preheating a vehicle battery, and the charging process of the whole vehicle and the heating process of the battery can be comprehensively controlled by combining the charging requirement of the vehicle; when no slow charging gun is inserted, judging whether the preheating requirement can be met according to the travel plan and the SOC state of the battery, so as to avoid unnecessary electric energy waste;
3) the reservation setting can be set through remote terminal or on-vehicle MP5, sets up and carries out the high in the clouds timing by car networking service platform after accomplishing, need not the vehicle and keeps high pressure or low pressure state of awakening up, has avoided the risk of high-pressure incident and battery feed.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (5)
1. A remote preheating control method for a battery pack comprises the following steps:
s1, setting a driving plan and a battery preheating setting by a user;
the user selects whether to start the remote battery preheating mode and the battery preheating target temperature on the vehicle-mounted MP5 or the intelligent mobile terminal, and inquires about a trip plan of the user: planned trip time, predicted mileage and travel time;
s2, the car networking service platform estimates the battery heating time, calculates the appointment waiting time according to the trip planning time and the estimated battery heating time, and performs background timing;
s3, when the timing end moment is reached, the vehicle networking service platform remotely wakes up the TBOX;
s4, after the vehicle-mounted network terminal is awakened, according to a remote battery preheating request sent by the Internet of vehicles service platform, the CAN awakens the vehicle controller, the battery management system and the DCDC node;
s5, the vehicle controller is awakened to control the vehicle to be powered on at high voltage;
the vehicle controller controls the whole vehicle to be electrified at high voltage according to a remote battery preheating request and a remote high voltage request sent by the TBOX;
s6, after the high-voltage electrification of the whole vehicle is finished, the battery management system controls the battery pack heating accessory to heat the battery according to the set preheating target temperature and the actual temperature of the battery;
s7, the vehicle-mounted network terminal feeds back the preheating state of the battery pack of the battery management system to the intelligent mobile terminal through the vehicle networking service platform; after preheating is finished, reminding a user of using the vehicle;
s8, the user gets on the vehicle, starts to drive the vehicle,
the method is characterized in that:
the user driving plan setting and the battery preheating setting comprise the following steps:
s101, a user selects whether to start a remote battery preheating mode on the vehicle-mounted MP5 or the intelligent mobile terminal;
s102, the vehicle MP5 or the intelligent mobile terminal judges whether the ambient temperature is less than a temperature threshold value T1; if yes, go to step S104; if not, the step S103 is executed;
s103, the vehicle MP5 or the intelligent mobile terminal prompts in a text mode that the function is only supported to be started below T1 ℃, and the step S112 is carried out;
s104, the vehicle-mounted MP5 or the intelligent mobile terminal judges whether the vehicle is inserted into the slow charging gun according to the charging gun insertion state signal uploaded by the OBC, if so, the step S105 is executed; if not, go to step S108;
s105, the vehicle-mounted MP5 or the intelligent mobile terminal inquires about a trip plan of the user, wherein the trip plan comprises planned trip time, predicted trip mileage and predicted trip duration;
s106, the vehicle MP5 or the intelligent mobile terminal judges whether the user is a short trip: judging whether the predicted trip mileage is greater than a threshold value S1 km or whether the predicted driving time is greater than a threshold value t1 min, if so, entering step S107; if not, go to step S110;
s107, the vehicle-mounted MP5 or the intelligent mobile terminal successfully sets the remote battery preheating mode, and the remote battery preheating mode is started;
s108, the vehicle-mounted MP5 or the intelligent mobile terminal judges whether the SOC of the battery is greater than a threshold value k, if so, the step S105 is executed; if not, go to step S109;
s109, the vehicle-mounted MP5 or the intelligent mobile terminal prompts that the electric quantity is too low and the slow charging gun is recommended to be plugged and then the vehicle is started, and the step S112 is carried out;
s110, the vehicle MP5 or the intelligent mobile terminal prompts words to remind that the power consumption of the battery is increased and whether the battery is started or not is confirmed when the battery is started and preheated in a short-distance driving mode;
s111, the vehicle MP5 or the intelligent mobile terminal judges whether the user selects 'confirm to open'; if yes, go to step S107; if not, go to step S112;
and S112, automatically closing a remote battery preheating mode switch of the vehicle-mounted MP5 or the intelligent mobile terminal.
2. The remote warm-up control method for battery pack according to claim 1,
the reservation storage and timing of the background of the Internet of vehicles service platform comprises the following steps:
s201, a user sets that the battery is preheated successfully in a remote mode at the intelligent mobile terminal, the intelligent mobile terminal sends reservation information to the Internet of vehicles service platform, and then the step S204 is carried out;
s202, the user sets the battery to be preheated successfully in the vehicle MP5, and the step S203 is carried out;
s203, the vehicle network terminal forwards the reservation information set by the user on the MP5 to the vehicle networking service platform, and then the step S204 is carried out; TBOX and MP5 may enter a sleep state after the vehicle is powered down;
s204, the Internet of vehicles service platform stores the user reservation information;
s205, the car networking service platform looks up a table according to the target battery heating temperature and the environment temperature to estimate the battery heating time t 1;
s206, the vehicle networking service platform performs background timing, and the calculation formula of the timing deadline is as follows:
the timing deadline time is the planned travel time, the estimated battery heating time t1, and the estimated charging time t 0;
s207, the Internet of vehicles service platform judges whether the timing deadline is reached; if yes, go to step S208; if not, returning to the step S206;
and S208, the vehicle networking service platform completes timing and wakes up the TBOX.
3. The remote warm-up control method for battery pack according to claim 2,
the target battery heating temperature is selected by table lookup within a certain temperature range according to the environment temperature and the driving mileage of a customer, and the table lookup data is derived from a system simulation or real vehicle test result which aims at the lowest energy consumption, and is shown in table 1;
the battery heating time is subjected to table lookup according to the environment temperature and the battery heating target temperature, and table lookup data is derived from real vehicle test data of battery heating and is shown in table 2;
table 1 table look-up of target battery heating temperatures:
table 2 estimation table of battery heating time t 1:
when the user performs the reserved charging setting in the slow charging gun inserting state, the charging time t0 needs to be estimated, and the calculation method is as follows:
the estimated charging time t0 is the time (charging target SOC — current SOC) for which the current ambient temperature measured SOC is charged from 0 to 100%.
4. The remote warm-up control method for battery pack according to claim 3,
the remote battery preheating control method comprises the following steps:
s301, after the TBOX is remotely awakened by the Internet of vehicles service platform, initializing and awakening the vehicle control unit, the battery management system and the DCDC through the CAN; another awakening mode is that the TBOX awakens the vehicle control unit firstly, and then the vehicle control unit awakens the battery management system and the DCDC through closing a low-voltage relay hard wire;
s302, the vehicle control unit judges whether the slow charging gun is inserted according to a charging gun insertion state signal sent by the battery management system; if yes, go to step S304; if not, go to step S303;
s303, controlling the whole vehicle to be powered on at high voltage by the vehicle controller and the battery management system according to the remote high voltage supply request of the TBOX, and entering the step S307 after the high voltage supply is finished;
s304, the vehicle controller and the battery management system control the vehicle to be powered on at high voltage according to the remote charging high voltage request of the TBOX, and the step S305 is executed after the high voltage is powered on;
s305, the battery management system judges whether a charging requirement exists according to the reserved charging setting, if so, the step S306 is executed; if not, entering the step SS 307;
s306, the battery management system controls charging power and heating power of a battery pack heating accessory respectively by combining the charging requirement SOC and the battery heating requirement temperature;
s307, controlling the power of a battery heating accessory by the battery management system according to the battery heating required temperature;
s308, the battery management system judges whether the SOC reaches a charging cut-off SOC; if yes, go to step S309; if not, returning to the step S306;
s309, stopping charging by the battery management system, and proceeding to step S310;
s310, the battery management system judges whether the target battery preheating temperature is reached; if yes, go to step S311; if not, returning to the step S307;
s311, controlling the battery pack heating accessory to stop heating by the battery management system;
s312, the intelligent mobile terminal feeds back a battery pack heating state fed back by the battery management system, and the user is prompted by characters to 'finish battery pack heating and please use a vehicle in time';
and S313, the user gets on the bus, and the process is finished.
5. A control system applying the remote preheating control method of the battery pack according to any one of claims 1 to 4,
the system comprises an intelligent mobile terminal, an Internet of vehicles service platform, a vehicle-mounted network terminal, a vehicle control unit, a battery management system, a vehicle-mounted multimedia entertainment host, a battery pack, a power distribution module (PDU), a vehicle-mounted charger (OBC), a cockpit heating accessory, a battery pack heating accessory, a high-voltage direct-current power supply conversion module (DCDC) and a storage battery; it is characterized in that the preparation method is characterized in that,
the intelligent mobile terminal and the MP5 are used for providing a remote appointment heating setting interface and a driving plan inquiry interface and feeding back an appointment state, a battery pack heating state and vehicle using reminding information to a client;
the vehicle networking service platform is used for realizing information interaction forwarding between the intelligent mobile terminal and the vehicle control module through wireless communication, and is used for making an appointment for requirement judgment and making an appointment for background timing of a waiting process;
the vehicle-mounted network terminal is used for forwarding information interaction between the vehicle networking service platform and the vehicle control module and controlling the awakening of the vehicle controller/battery management system/DCDC/OBC;
the vehicle control unit is used for controlling power-on and power-off requests of the high-voltage system according to the vehicle state and controlling the heating accessories of the cockpit to preheat the cockpit;
the battery management system is used for executing high-voltage power-on and power-off control according to a high-voltage power-on and power-off request of the vehicle control unit and controlling a battery pack heating accessory to preheat the battery pack according to a preset battery pack heating requirement;
the OBC is used for judging the insertion state of the slow charging gun and controlling the charging power according to the request of the battery management system in the insertion state of the slow charging gun.
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