CN113928184A - Preheating method and system for automobile power battery pack, automobile, equipment and storage medium - Google Patents
Preheating method and system for automobile power battery pack, automobile, equipment and storage medium Download PDFInfo
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- CN113928184A CN113928184A CN202010604617.XA CN202010604617A CN113928184A CN 113928184 A CN113928184 A CN 113928184A CN 202010604617 A CN202010604617 A CN 202010604617A CN 113928184 A CN113928184 A CN 113928184A
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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
- B60L58/24—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
- B60L58/27—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 by heating
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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 preheating method, a preheating system, an automobile, preheating equipment and a storage medium for an automobile power battery pack, wherein when the automobile is in a parking state, the method determines a cooling rate according to the minimum value of the temperatures of all battery cells of all the battery cells of the power battery pack at the parking time point and a preset reference environment temperature; if the estimated lowest temperature obtained according to the minimum value of the cell temperature, the automobile use time point, the parking time point and the cooling rate is smaller than the preset target temperature threshold, the self-heating time point is determined according to the battery preheating temperature rise rate, the estimated lowest temperature and the preset target temperature threshold, and the power battery pack is preheated at the self-heating time point. The power battery pack is preheated at the self-heating time point, so that the battery temperature can be ensured to reach the target temperature threshold value at the automobile use time point to the maximum extent, the preheating time between the self-heating time point and the automobile use time point can be shortest, and the preheating efficiency and the automobile use experience of a user are improved.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a preheating method and system for an automobile power battery pack, an automobile, equipment and a storage medium.
Background
With the development of scientific technology, new energy automobiles are gradually widely used, and a power battery pack is used as a core power source in the new energy automobiles and is applied to different environments, but the new energy automobiles are placed in environments with low temperature for a long time, the temperature of a battery core of the power battery pack is very low, and if the automobiles are started immediately, the power output of the power battery pack is probably limited, so that the power performance of the automobiles is weakened; when the temperature is low to a certain degree, the automobile can even be prevented from starting.
At present, in order to avoid the problem that the battery temperature of the power battery pack is too low to normally use the automobile when the automobile is used, a user generally presets a certain heating trigger time before a preset automobile using time to automatically preheat the power battery pack. The method has the following disadvantages: the heating triggering time is preset, after the preheating is started at the time, the battery temperature of the preheated power battery pack at the final using time and the target temperature expected by a user can have large deviation, so that the problem that the battery temperature of the power battery pack is too low at the using time can still exist, the problem that the automobile cannot be normally used due to too low battery temperature cannot be completely solved, and the user using experience is influenced.
Disclosure of Invention
The embodiment of the invention provides a preheating method and device for a power battery pack of an automobile, computer equipment and a storage medium, and aims to solve the problem that the automobile cannot be normally used due to the fact that the battery temperature of the power battery pack is too low when the automobile is used.
A method for preheating a power battery pack of an automobile comprises the following steps:
when an automobile is in a parking state, after a preheating instruction comprising an automobile use time point is received, the parking time point of the automobile and the cell temperature of each cell in a power battery pack of the automobile at the parking time point are obtained;
determining the cooling rate of the power battery pack according to the minimum value of the battery core temperatures and a preset reference environment temperature;
acquiring the estimated lowest temperature of the power battery pack at the automobile using time point according to the minimum value in the battery cell temperatures, the automobile using time point, the parking time point and the cooling rate;
if the estimated minimum temperature is smaller than a preset target temperature threshold, determining a self-heating time point according to a preset battery preheating temperature rise rate, the estimated minimum temperature and the preset target temperature threshold, and preheating the power battery pack at the self-heating time point.
A preheating system of a power battery pack of an automobile comprises a controller for executing the preheating method of the power battery pack of the automobile.
An automobile comprises the automobile power battery pack preheating system.
A computer device comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program to realize the vehicle power battery pack preheating method.
A computer-readable storage medium, which stores a computer program that, when executed by a processor, implements the above-described vehicle power battery pack warm-up method.
According to the preheating method, the preheating system, the automobile, the preheating equipment and the storage medium of the automobile power battery pack, when the automobile is in a parking state, after a preheating instruction containing an automobile use time point is received, the parking time point of the automobile and the cell temperature of each cell in the automobile power battery pack at the parking time point are obtained; determining the cooling rate of the power battery pack according to the minimum value of the battery core temperatures and a preset reference environment temperature; acquiring the estimated lowest temperature of the power battery pack at the automobile using time point according to the minimum value in the battery cell temperatures, the automobile using time point, the parking time point and the cooling rate; if the estimated minimum temperature is smaller than a preset target temperature threshold, determining a self-heating time point according to a preset battery preheating temperature rise rate, the estimated minimum temperature and the preset target temperature threshold, and preheating the power battery pack at the self-heating time point. The power battery pack is preheated at the self-heating time point, so that the battery temperature of the power battery pack can be ensured to reach the target temperature threshold value at the automobile use time point to the maximum extent, the preheating time between the self-heating time point and the automobile use time point can be shortened to the minimum, and the preheating efficiency and the automobile use experience of a user are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a flow chart of a method for preheating a power battery pack of a vehicle according to an embodiment of the present invention;
FIG. 2 is a flowchart of step S14 of the method for warming up the power battery pack of the vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a computer device according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one embodiment, as shown in fig. 1, a method for preheating a power battery pack of a vehicle is provided, which includes the following steps:
s11: when the automobile is in a parking state, after a preheating instruction containing the using time point of the automobile is received, the parking time point of the automobile and the cell temperature of each cell in a power battery pack of the automobile at the parking time point are obtained.
Preferably, the automobile is an electric automobile comprising a power battery pack; further, the power battery pack is composed of a plurality of single batteries (each single battery is composed of an electric core and a protection circuit board), and the single battery is preferably a lithium ion battery. The automobile use time point refers to a time point which is preset by a user and needs to use the automobile. The warm-up command is a command generated after the vehicle is instructed to start an intelligent warm-up function for the power battery pack after the vehicle use time point is set (when the intelligent warm-up function is started, the vehicle starts warming up the power battery pack from the later-mentioned self-heating time point).
Understandably, the parking time point in this embodiment refers to a time point when the vehicle meets the preheating condition, when the vehicle is in a parking state (i.e. the vehicle is in a stable state after the user finishes the vehicle) and receives the preheating instruction; in an embodiment, if a power battery pack of an automobile is in a charging state, and a parking time point is a time point when charging of the automobile is completed, it can be understood that, since the cell temperatures of each cell in the power battery pack are changed during charging of the automobile, if the time point when the automobile stops moving is determined as the parking time point, it may result in that the cell temperatures of each cell in the power battery pack are determined to be inaccurate, and therefore, when the automobile is in the charging state, the power battery pack cannot be preheated, and therefore, the preheating condition cannot be met, so that it is preferable to record the time point when charging of the automobile is completed as the parking time point. In the step, specifically, when the automobile is in a parking state, after a preheating instruction including an automobile use time point is received, if a power battery pack of the automobile is in a charging state, after the power battery pack is charged, a charging completion time point of the power battery pack is obtained; and when the charging completion time point does not reach the automobile use time point, recording the charging completion time point as the parking time point of the automobile, and acquiring the cell temperature of each cell in the power battery pack of the automobile at the parking time point.
In another embodiment, if the power battery pack of the vehicle is not in a charging state and the current SOC value of the power battery pack is greater than or equal to a preset power threshold (when the power battery pack is in the charging state or the current SOC value of the power battery pack is less than the preset power threshold, the power battery pack cannot be preheated, and therefore the preheating condition cannot be met), the time point at which the preheating instruction is received is recorded as the parking time point. S12: and determining the cooling rate of the power battery pack according to the minimum value of the cell temperatures and the preset reference environment temperature.
The preset reference ambient temperature refers to an estimated reference temperature of an environment where the power battery pack is located, and can be determined according to the ambient temperature of the automobile at the parking time point and recent local weather information (weather temperature information of the parking position of the automobile in a preset time period). The cooling rate refers to the speed at which the temperature of the power battery pack drops in a preset reference environment.
Specifically, after the cell temperatures of each cell in the power battery pack of the automobile at the parking time point are obtained, the cooling rate of the power battery pack at the preset reference environment temperature is obtained by querying from a preset cooling rate table according to the minimum value of the cell temperatures and the preset reference environment temperature. Further, the preset cooling rate table can be obtained according to test data of the power battery pack with the same type as the power battery pack of the automobile after cooling tests at different reference ambient temperatures, and the preset cooling rate table is stored in the database to be called at any time when needed.
S13: and acquiring the estimated lowest temperature of the power battery pack at the automobile use time point according to the minimum value in the battery core temperature, the automobile use time point, the parking time point and the cooling rate.
The estimated minimum temperature refers to an estimated value of the minimum temperature to which the power battery pack drops at the time point of use of the vehicle.
Specifically, after the cooling rate of the power battery pack is determined according to the minimum value of the cell temperatures and the preset reference environment temperature, the parking time length from the parking time point to the automobile use time point is determined, and the minimum temperature of the power battery pack, which is decreased from the minimum value of the cell temperatures at the automobile use time point, is estimated according to the parking time length, the minimum value of the cell temperatures and the cooling rate of the power battery pack (that is, after the parking time length, the temperature value of the power battery pack, which is decreased from the minimum value of the cell temperatures, is the estimated minimum temperature), that is, the estimated minimum temperature is estimated.
S14: and if the estimated minimum temperature is smaller than the preset target temperature threshold, determining a self-heating time point according to the preset battery preheating temperature rise rate, the estimated minimum temperature and the preset target temperature threshold, and preheating the power battery pack at the self-heating time point.
The preset target temperature threshold value can be adjusted according to a vehicle using mode selected by a user. For example, when a user wants to enable the vehicle to be in a better power performance state at the time point of vehicle use, at this time, the preset target temperature threshold value may be correspondingly set to a temperature value enabling the power battery pack to output better performance; when a user wants to enable the automobile to be in a more energy-saving state in the preheating process, the preset target temperature threshold value can be set to be a smaller value, so that the power battery pack of the automobile is preheated to the smaller preset target temperature threshold value, the basic use requirement can be met, and meanwhile the purpose of energy saving can be achieved. The preset battery preheating and temperature rising rate refers to the temperature rising speed of the power battery pack in the self-heating process, and is obtained according to the experimental data of the self-heating of the power battery pack of the same type as the power battery pack of the automobile, and is stored in the database to be called at any time when needed.
Specifically, after the estimated lowest temperature of the power battery pack at the using time point of the automobile is obtained, the estimated lowest temperature is compared with a preset target temperature threshold, and if the estimated lowest temperature is smaller than the preset target temperature threshold, the power battery needs to be preheated; at the moment, the self-heating time point for starting preheating the power battery pack is determined according to the preset battery preheating temperature rise rate, the estimated minimum temperature and the preset target temperature threshold.
Preferably, in the process of preheating the power battery pack, the power battery pack is subjected to high-frequency alternate charging and discharging through a heating module connected with the power battery pack (that is, the power battery pack is alternately in a charging state and a discharging state according to a fixed high frequency by the heating module), so that the power battery pack generates heat by internal resistance of the power battery pack, the power battery pack is heated rapidly and uniformly, and self-heating is realized.
Further, the heating module is a charging and discharging self-heating circuit, the charging and discharging self-heating circuit is a circuit capable of achieving high-frequency alternating charging and discharging of the power battery pack, and the charging and discharging self-heating circuit includes, but is not limited to, a plurality of energy storage elements and a plurality of switch elements. When the power battery pack needs to be heated, the power battery pack discharges energy storage elements such as capacitors and inductors, the polarity of the charging and discharging self-heating circuit is reversed after the energy storage elements discharge for a period of time, at the moment, the energy storage elements discharge the power battery pack, and the temperature rise of the power battery pack is realized through the self internal resistance heating of the power battery pack. The charge-discharge time or the charge-discharge state alternation of the power battery pack can be controlled by orderly switching on and off of the switching element (namely, a certain switching frequency is given to ensure that the switching element realizes orderly switching on and off).
In this embodiment, the minimum value of the cell temperature of each cell of the power battery pack at the parking time point is combined with the reference environment temperature to determine the cooling rate of the power battery pack, and the estimated minimum temperature of the power battery pack is determined according to the cooling rate, so as to determine the self-heating time point of the power battery pack for preheating, and further preheat the power battery pack at the self-heating time point.
In an embodiment, after step S11, that is, after receiving the warm-up command including the time point of use of the vehicle, the method further includes the following steps:
and judging whether the power battery pack of the automobile is in a charging state currently.
And if the power battery pack is currently in a charging state, acquiring a charging completion time point when the power battery pack is charged after the power battery pack is charged.
And when the charging completion time point is smaller than the automobile use time point, recording the charging completion time point as a parking time point.
The charging completion time point refers to a corresponding time point when the automobile is charged.
Specifically, when the automobile is in a parking state, after a preheating instruction including an automobile use time point is received, whether a power battery pack of the automobile is in a charging state is judged, if the power battery pack is in the charging state, the power battery pack is charged preferentially, so that the situation that the current SOC value of the power battery pack is smaller than a preset electric quantity threshold value is avoided (when the current SOC value of the power battery pack is smaller than the preset electric quantity threshold value, the preheating instruction cannot be responded, and the power battery pack cannot be heated automatically); after the power battery pack is charged, acquiring a charging completion time point when the power battery pack is charged; when the charging completion time point is smaller than the automobile use time point, the fact that the power battery pack does not reach the automobile use time point preset by a user after charging is completed is represented, the automobile enters a preheating process, the charging completion time point is recorded as a parking time point, and the cell temperature of each cell in the power battery pack of the automobile at the parking time point is obtained.
Further, when the charging completion time point is greater than or equal to the automobile use time point, representing that the automobile use time point preset by the user is reached, and prompting the user that the automobile charging is completed and the automobile use time is reached when the charging completion time point is equal to the automobile use time point; and when the charging completion time point is greater than the automobile use time point, prompting the user that the automobile is not charged completely when the automobile use time is reached, and sending the current electric quantity to the mobile terminal of the user, which is associated with the automobile, so that the user can determine to continue charging or use the automobile.
In one embodiment, after determining whether the power battery pack of the vehicle is currently in a charging state, the method further includes:
and if the power battery pack is not in the charging State currently, acquiring a current SOC (State Of Charge) value Of the power battery pack.
The current SOC value of the power battery pack is the battery charge state of the power battery pack, and the charge state refers to the ratio of the current residual capacity of the power battery pack to the capacity of the power battery pack in a full charge state. The current SOC value of the power Battery pack is stored in a BMS (Battery Management System) or other database, so that the current SOC value of the power Battery pack can be acquired from the BMS after it is determined that the power Battery pack is not currently in a charging state.
And if the current SOC value of the power battery pack is smaller than the preset electric quantity threshold value, prompting that the current electric quantity of the automobile does not meet the preheating requirement.
And if the current SOC value of the power battery pack is greater than or equal to the preset electric quantity threshold value, recording the time point of receiving the preheating instruction as a parking time point.
Specifically, after judging whether a power battery pack of the automobile is currently in a charging state or not, if the power battery pack is not currently in the charging state, acquiring a current SOC value of the power battery pack; if the current SOC value of the power battery pack is smaller than the preset electric quantity threshold value, the current electric quantity of the power battery pack is represented to be insufficient, the preheating process cannot be stably started, the fact that the current electric quantity of the power battery pack of the automobile does not meet the preset requirement is prompted, the power battery pack of the automobile needs to be charged, and when the current SOC value of the power battery pack is larger than or equal to the preset electric quantity threshold value, the time point when the current SOC value reaches the preset electric quantity threshold value is recorded as a parking time point.
Further, if the current SOC value of the power battery pack is larger than or equal to the preset electric quantity threshold value, the current electric quantity of the automobile is represented to be sufficient, the automobile can stably enter a preheating process, and the time point of receiving the preheating instruction is recorded as the parking time point. Besides, the time point when the SOC value of the power battery pack is determined to be greater than or equal to the preset electric quantity threshold value can be recorded as the parking time point.
In an embodiment, as shown in fig. 2, in step S14, the determining the self-heating time point according to the preset battery preheating temperature-rising rate, the estimated minimum temperature and the preset target temperature threshold specifically includes the following steps:
s141: and determining the heating time for preheating the power battery pack from the estimated lowest temperature to a preset target temperature threshold according to the preset battery preheating temperature rise rate.
Specifically, after the estimated lowest temperature of the power battery pack at the automobile use time point is obtained, the heating time for preheating the power battery pack from the estimated lowest temperature to the preset target temperature threshold is determined according to the preset battery preheating temperature rise rate obtained through the experimental data in advance.
S142: when the heating time length is shorter than the parking time length, acquiring a time difference value between the parking time length and the heating time length, and determining a self-heating time point according to the time difference value and the parking time point; the parking time length is the difference between the automobile using time point and the parking time point.
Specifically, the difference between the automobile use time point and the parking time point is determined as the parking time period. After the heating time for preheating the power battery pack from the estimated lowest temperature to the preset target temperature threshold is determined according to the preset battery preheating temperature rise rate, comparing the heating time with the parking time; and when the heating time length is less than the parking time length, acquiring a time difference value between the parking time length and the heating time length, and determining a self-heating time point according to the time difference value and the parking time point (namely, on the basis of the parking time point, the time point obtained by adding the time difference value is the self-heating time point). For example, assuming a heating time period of 10min and an automobile use time point of 14: 28. the parking time points of the automobile are 14: 12 (the using time point of the automobile and the stopping time point of the automobile are the same day time), the stopping time is 16min, the heating time at the time is less than the stopping time, the time difference between the stopping time and the heating time is 6min, and the self-heating time point is determined to be 14:18 according to the time difference and the stopping time point (namely the time point after adding the time difference on the basis of the original stopping time point).
In the embodiment, when the heating time is shorter than the parking time, after the self-heating time point preheats the power battery pack, the battery temperature of the power battery pack can be ensured to just reach the target temperature threshold value at the automobile use time point, so that the preheating time between the self-heating time point and the automobile use time point is shortest, the condition that the battery temperature is deviated from the target temperature threshold value due to the fact that the battery temperature is continuously reduced or increased from the target temperature threshold value after the automobile is heated to the target temperature threshold value before the automobile use time point is avoided, and the condition that the battery temperature needs to be readjusted to be consistent with the target temperature threshold value through a secondary preheating or cooling measure is avoided, therefore, the invention improves the preheating efficiency, shortens the preheating time, and saves the energy for preheating the power battery pack, the vehicle using experience of the user is improved. S143: and recording the stopping time point as a self-heating time point when the heating time length is greater than or equal to the stopping time length.
Specifically, after the heating time length for preheating the power battery pack from the estimated lowest temperature to the preset target temperature threshold is determined according to the preset battery preheating temperature rise rate, the heating time length is compared with the parking time length; when the heating time is longer than or equal to the parking time, the characteristic is that when a user needs to use the vehicle, the process of preheating the power battery pack can be just completed (the heating time is equal to the parking time) or not completed (the heating time is longer than the parking time), and then the parking time point is recorded as a self-heating time point.
For example, assuming a heating time period of 10min and an automobile use time point of 14: 28. the parking time points of the automobile are 14: 20 (the using time point of the automobile and the stopping time point of the automobile are the same time in the same day), the stopping time is 8min, the heating time at the time is longer than the stopping time, the power battery pack needs to be immediately preheated at the stopping time point, in addition, when this occurs, the user may be able to determine the time period for the heating operation by sending information (or other effective means) containing the heating time period and the parking time period to the mobile terminal of the user associated with the car, prompting the user that the heating time length is longer than the parking time length so that the user can select to prolong the parking time length (namely, set a larger automobile using time point), or receiving the result that the temperature of the power battery pack does not reach the preset target temperature threshold after the power battery pack is preheated, therefore, the vehicle using mode is further adjusted (namely, the preset target temperature threshold value is adjusted), so that the power battery pack can meet the requirements of users.
In an embodiment, before step S12, that is, before determining the cooling rate of the power battery pack according to the minimum value of the cell temperatures and the preset reference ambient temperature, the method further includes:
the method comprises the steps of obtaining the environmental temperature of a power battery pack of the automobile at a parking time point and the weather temperature information of the parking position of the automobile in a preset time period. Wherein the preset time period may be several days before or after the current time (it is understood that, assuming that the current time is 18/6/2020, the preset time period may be 13/6/2020 to 23/6/2020); the weather temperature information can be average temperature and weather change trend in a preset time period and the like, and the weather temperature information can be obtained by collecting a weather report.
Specifically, after the parking time point of the automobile is obtained, the ambient temperature of the power battery pack of the automobile at the parking time point (namely, the ambient temperature of the power battery pack when the automobile is charged completely) and the weather temperature information of the parking position of the automobile in a preset time period are obtained.
And determining the reference ambient temperature according to the weather temperature information and the ambient temperature. Specifically, after the environmental temperature of the power battery pack of the automobile at the parking time point and the weather temperature information of the automobile parking position within the preset time period are obtained, a reference environmental temperature is estimated according to the weather temperature information and the environmental temperature, that is, a temperature value of a subsequent environment where the power battery pack is located is estimated, so that the cooling rate of the power battery pack, which starts to decrease from the minimum value of the battery cell temperatures, is determined according to the reference environmental temperature.
In one embodiment, after obtaining the estimated lowest temperature of the power battery pack at the using time point of the automobile, the method further comprises the following steps:
and if the estimated lowest temperature is greater than the preset target temperature threshold, prompting that the power battery pack does not need to be preheated.
Specifically, after the estimated lowest temperature of the power battery pack at the automobile use time point is obtained, the estimated lowest temperature is compared with a preset target temperature threshold, and if the estimated lowest temperature is greater than the preset target temperature threshold, the power battery pack does not need to be preheated, so that a user can be prompted to do not need to preheat the power battery pack through an effective prompting mode (such as sending prompting information to a mobile terminal of the user, which is associated with the automobile).
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In one embodiment, a vehicle power battery pack warm-up system is provided, comprising a controller for performing the vehicle power battery pack warm-up method in the above-described embodiments.
In one embodiment, a vehicle is provided, which includes the vehicle power battery pack preheating system in the above embodiments.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 3. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer equipment is used for storing data used by the preheating method of the automobile power battery pack. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method for warming up a vehicle power battery pack.
In one embodiment, a computer device is provided, which includes a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the vehicle power battery pack preheating method in the above-mentioned embodiments.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, implements the vehicle power battery pack warm-up method in the above-described embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A preheating method for a power battery pack of an automobile is characterized by comprising the following steps:
when an automobile is in a parking state, after a preheating instruction comprising an automobile use time point is received, the parking time point of the automobile and the cell temperature of each cell in a power battery pack of the automobile at the parking time point are obtained;
determining the cooling rate of the power battery pack according to the minimum value of the battery core temperatures and a preset reference environment temperature;
acquiring the estimated lowest temperature of the power battery pack at the automobile using time point according to the minimum value in the battery cell temperatures, the automobile using time point, the parking time point and the cooling rate;
if the estimated minimum temperature is smaller than a preset target temperature threshold, determining a self-heating time point according to a preset battery preheating temperature rise rate, the estimated minimum temperature and the preset target temperature threshold, and preheating the power battery pack at the self-heating time point.
2. The method for warming up a power battery pack of a vehicle according to claim 1, wherein after receiving the warming-up command including a time point of use of the vehicle, the method further comprises:
judging whether a power battery pack of the automobile is in a charging state currently;
if the power battery pack is currently in a charging state, acquiring a charging completion time point when the power battery pack is charged after the power battery pack is charged;
and when the charging completion time point is smaller than the automobile using time point, recording the charging completion time point as the parking time point.
3. The method for warming up a power battery pack of a vehicle according to claim 2, wherein said determining whether the power battery pack of the vehicle is currently in a charging state further comprises:
if the power battery pack is not in a charging state currently, acquiring a current SOC value of the power battery pack;
if the current SOC value of the power battery pack is smaller than a preset electric quantity threshold value, prompting that the current electric quantity of the automobile does not meet the preheating requirement;
and if the current SOC value of the power battery pack is greater than or equal to a preset electric quantity threshold value, recording the time point of receiving the preheating instruction as the parking time point.
4. The vehicle power battery pack warm-up method according to claim 1, wherein the determining a self-heating time point based on a preset battery warm-up temperature rate, the estimated minimum temperature, and the preset target temperature threshold value, further comprises:
according to a preset battery preheating temperature rise rate, determining the heating time length for preheating the power battery pack from the estimated lowest temperature to the preset target temperature threshold;
when the heating time length is less than the parking time length, acquiring a time difference value between the parking time length and the heating time length, and determining a self-heating time point according to the time difference value and the parking time point; the parking time length is the difference value between the automobile using time point and the parking time point;
and recording the stopping time point as a self-heating time point when the heating time length is greater than or equal to the stopping time length.
5. The method for preheating the power battery pack of claim 1, wherein before determining the cooling rate of the power battery pack according to the minimum value of the cell temperatures and a preset reference ambient temperature, the method further comprises:
acquiring the environmental temperature of the power battery pack of the automobile at the parking time point and the weather temperature information of the parking position of the automobile in a preset time period;
and determining the reference environment temperature according to the weather temperature information and the environment temperature.
6. The vehicle power battery pack warm-up method of claim 1, wherein the obtaining of the estimated minimum temperature of the power battery pack at the point in time of use of the vehicle further comprises:
and if the estimated lowest temperature is greater than a preset target temperature threshold value, prompting that the power battery pack does not need to be preheated.
7. A vehicle power battery pack warm-up system, characterized by comprising a controller for performing the vehicle power battery pack warm-up method according to any one of claims 1 to 6.
8. An automobile comprising the automobile power battery pack warm-up system according to claim 7.
9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method for warming up a vehicle power battery pack according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out a method for warming up a vehicle power battery pack according to any one of claims 1 to 6.
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| CN202010604617.XA CN113928184A (en) | 2020-06-29 | 2020-06-29 | Preheating method and system for automobile power battery pack, automobile, equipment and storage medium |
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| CN202010604617.XA CN113928184A (en) | 2020-06-29 | 2020-06-29 | Preheating method and system for automobile power battery pack, automobile, equipment and storage medium |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112937370A (en) * | 2021-02-22 | 2021-06-11 | 北京车和家信息技术有限公司 | Vehicle power battery heat preservation control method and device |
| CN114619925A (en) * | 2022-03-30 | 2022-06-14 | 重庆金康赛力斯新能源汽车设计院有限公司 | Low-temperature quick-charging heating method, device, equipment and storage medium for lithium ion battery |
| CN114771355A (en) * | 2022-05-12 | 2022-07-22 | 重庆金康赛力斯新能源汽车设计院有限公司 | Battery thermal management method and device, computer equipment and storage medium |
| CN114893523A (en) * | 2022-05-27 | 2022-08-12 | 中国第一汽车股份有限公司 | Low-temperature heating device and heating method for rubber bushing |
| CN115377539A (en) * | 2022-04-26 | 2022-11-22 | 宁德时代新能源科技股份有限公司 | Battery heating method and device, electric equipment and storage medium |
| CN115377557A (en) * | 2022-07-18 | 2022-11-22 | 宁德时代新能源科技股份有限公司 | Battery self-heating control method, equipment and storage medium |
| CN115395618A (en) * | 2022-09-21 | 2022-11-25 | 东集技术股份有限公司 | Lithium battery temperature control method, system, device and readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108878997A (en) * | 2018-06-04 | 2018-11-23 | 四川野马汽车股份有限公司 | A kind of electric automobile power battery pre-heating system and its pre-heating mean based on mobile client |
| CN111251939A (en) * | 2018-11-30 | 2020-06-09 | 比亚迪股份有限公司 | Vehicle, reservation management system thereof, reservation system thereof, and reservation management method thereof |
| CN111251944A (en) * | 2018-11-30 | 2020-06-09 | 比亚迪股份有限公司 | Vehicle, reservation management system thereof, reservation system thereof, and reservation management method thereof |
-
2020
- 2020-06-29 CN CN202010604617.XA patent/CN113928184A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108878997A (en) * | 2018-06-04 | 2018-11-23 | 四川野马汽车股份有限公司 | A kind of electric automobile power battery pre-heating system and its pre-heating mean based on mobile client |
| CN111251939A (en) * | 2018-11-30 | 2020-06-09 | 比亚迪股份有限公司 | Vehicle, reservation management system thereof, reservation system thereof, and reservation management method thereof |
| CN111251944A (en) * | 2018-11-30 | 2020-06-09 | 比亚迪股份有限公司 | Vehicle, reservation management system thereof, reservation system thereof, and reservation management method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112937370A (en) * | 2021-02-22 | 2021-06-11 | 北京车和家信息技术有限公司 | Vehicle power battery heat preservation control method and device |
| WO2022174820A1 (en) * | 2021-02-22 | 2022-08-25 | 北京车和家信息技术有限公司 | Vehicle traction battery thermal insulation control method and apparatus |
| CN112937370B (en) * | 2021-02-22 | 2024-05-14 | 北京车和家信息技术有限公司 | Vehicle power battery heat preservation control method and device |
| CN114619925A (en) * | 2022-03-30 | 2022-06-14 | 重庆金康赛力斯新能源汽车设计院有限公司 | Low-temperature quick-charging heating method, device, equipment and storage medium for lithium ion battery |
| CN114619925B (en) * | 2022-03-30 | 2023-08-25 | 重庆金康赛力斯新能源汽车设计院有限公司 | Low-temperature quick-charging heating method, device, equipment and storage medium for lithium ion battery |
| WO2023207414A1 (en) * | 2022-04-26 | 2023-11-02 | 宁德时代新能源科技股份有限公司 | Battery heating method and apparatus, electrical device and storage medium |
| CN115377539A (en) * | 2022-04-26 | 2022-11-22 | 宁德时代新能源科技股份有限公司 | Battery heating method and device, electric equipment and storage medium |
| CN114771355A (en) * | 2022-05-12 | 2022-07-22 | 重庆金康赛力斯新能源汽车设计院有限公司 | Battery thermal management method and device, computer equipment and storage medium |
| CN114771355B (en) * | 2022-05-12 | 2024-05-24 | 重庆赛力斯新能源汽车设计院有限公司 | Battery thermal management method, device, computer equipment and storage medium |
| CN114893523A (en) * | 2022-05-27 | 2022-08-12 | 中国第一汽车股份有限公司 | Low-temperature heating device and heating method for rubber bushing |
| CN115377557B (en) * | 2022-07-18 | 2024-01-12 | 宁德时代新能源科技股份有限公司 | Battery self-heating control method, device and storage medium |
| CN115377557A (en) * | 2022-07-18 | 2022-11-22 | 宁德时代新能源科技股份有限公司 | Battery self-heating control method, equipment and storage medium |
| CN115395618A (en) * | 2022-09-21 | 2022-11-25 | 东集技术股份有限公司 | Lithium battery temperature control method, system, device and readable storage medium |
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