CN115465121B - Vehicle control method, device, equipment and medium - Google Patents
Vehicle control method, device, equipment and medium Download PDFInfo
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- CN115465121B CN115465121B CN202211321153.7A CN202211321153A CN115465121B CN 115465121 B CN115465121 B CN 115465121B CN 202211321153 A CN202211321153 A CN 202211321153A CN 115465121 B CN115465121 B CN 115465121B
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- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000007600 charging Methods 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims description 26
- 238000004590 computer program Methods 0.000 claims description 14
- 230000003068 static effect Effects 0.000 claims description 8
- 230000009194 climbing Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 13
- 230000001276 controlling effect Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 9
- 230000015654 memory Effects 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 230000002269 spontaneous effect Effects 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000013528 artificial neural network Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000010278 pulse charging Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- 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
- B60L58/25—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 controlling the electric load
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a vehicle control method, which comprises the following steps: acquiring the real-time temperature of the battery pack; comparing the real-time temperature of the battery pack with a temperature threshold; when the real-time temperature of the battery pack is equal to or greater than the temperature threshold, setting a power value as a target charge-discharge power value; and controlling the vehicle at the target charge-discharge power value. In the invention, if the temperature of the battery pack of the vehicle reaches the temperature threshold value, the charging and discharging power of the battery is limited, and the vehicle is controlled by the corresponding charging and discharging power, so that the temperature of the battery pack cannot continuously rise, thereby greatly avoiding faults caused by overhigh temperature of the battery.
Description
Technical Field
The invention belongs to the field of battery system BMS application, and particularly relates to a vehicle control method, device, equipment and medium.
Background
With the rise of new energy automobile markets, the key research topic is to ensure the safe use of the power battery at high temperature. The new energy automobile power battery at the present stage mainly takes a lithium iron phosphate battery and a ternary lithium battery as main materials; at present, two types of batteries are widely applied to new energy automobiles, and the safety of the batteries is guaranteed to a certain extent. However, due to the complex factors of electrochemical characteristics, production process, working environment and the like of the power battery, the power battery still has the risks of thermal runaway, spontaneous combustion and the like when working in a high-temperature range. In order to avoid the occurrence of the above conditions, the middle-high-end automobile mostly adopts a battery cooling system to cool the battery on the battery system hardware, so that the safety risk of the battery in the use of a high-temperature zone is avoided. Patent CN110816313a, which has been published, discloses determining a current required power of a vehicle according to a current working condition of the vehicle and distributing power to a battery in the battery usage mode according to the current required power, but does not disclose how to treat when a battery temperature exceeds a temperature threshold to avoid a failure of the vehicle.
At present, battery cell charge and discharge characteristic parameters are directly applied to BMS (BatteryManagement System, BMS, battery management system) software for management, but the battery cell characteristic parameters only represent that the battery cells have such charge and discharge capabilities, such as: with the rise of the temperature of the battery, the chemical property of the battery is more active, and the higher the temperature of the battery is, the higher the charge and discharge power is under the same state-of-charg (SOC) state of charge (residual quantity of the battery). The larger charge and discharge power may cause the battery temperature to further rise, thereby exceeding the safe use temperature interval of the battery cell, causing risks such as thermal runaway. Therefore, how to avoid the problem of thermal runaway is a problem to be solved.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a vehicle control method, apparatus, device and medium, so as to solve the above-mentioned technical problems.
The invention provides a vehicle control method, which comprises the following steps:
Acquiring the real-time temperature of the battery pack;
comparing the real-time temperature of the battery pack with a temperature threshold;
when the real-time temperature of the battery pack is equal to or greater than the temperature threshold, setting a power value as a target charge-discharge power value;
And controlling the vehicle at the target charge-discharge power value.
In an embodiment of the present invention, the calibration step of the temperature threshold includes:
and controlling the temperature of the battery pack to enable the temperature of the battery pack to reach a first temperature value, wherein the first temperature value is as follows: the highest temperature value of the battery pack when the vehicle is in a static state under the first working condition;
Performing charge and discharge control on the battery pack to enable the temperature of the battery pack to reach a second temperature value and the residual capacity of the battery pack to reach a set capacity value, wherein the second temperature value is the highest temperature value of the battery pack in the process that the residual capacity of the battery pack is 0-100%, and the set capacity value is the residual capacity of the battery pack when the temperature of the battery pack reaches the second temperature value in the charging process;
acquiring a third temperature value of the battery pack of the vehicle under the second working condition, wherein the third temperature value is the highest temperature value of the battery pack of the vehicle under the second working condition;
comparing the first temperature value, the second temperature value and the third temperature value, determining the maximum temperature value in the first temperature value, the second temperature value and the third temperature value, and taking the maximum temperature value as a temperature threshold.
In an embodiment of the present invention, the first working condition is: within the set time, the whole vehicle is in an environment of 38-42 ℃.
In an embodiment of the present invention, the second working condition is:
The vehicle alternately runs under a first running condition and a second running condition, wherein the first running condition is that the vehicle runs on a horizontal road section at a first running speed, the second running condition is that the vehicle runs on a climbing road section at a second running speed, and the first running speed is larger than the second running speed.
In an embodiment of the invention, the set power value is a charge-discharge power value that makes the real-time temperature of the battery pack not greater than a temperature threshold.
In an embodiment of the present invention, the calibration of the set power value is performed under an application scenario with or without thermal management failure.
The invention provides a vehicle control device, which comprises:
The temperature acquisition module is used for acquiring the real-time temperature of the battery pack;
the comparison module is used for comparing the real-time temperature of the battery pack with a temperature threshold value;
The charge-discharge power value determining module is used for taking the set power value as a target charge-discharge power value as the target charge-discharge power value when the real-time temperature of the battery pack is equal to or greater than the temperature threshold value;
And the control module is used for controlling the vehicle at the target charge-discharge power value.
In an embodiment of the present invention, the calibration step of the temperature threshold includes:
and controlling the temperature of the battery pack to enable the temperature of the battery pack to reach a first temperature value, wherein the first temperature value is as follows: the highest temperature value of the battery pack when the vehicle is in a static state under the first working condition;
Performing charge and discharge control on the battery pack to enable the temperature of the battery pack to reach a second temperature value and the residual capacity of the battery pack to reach a set capacity value, wherein the second temperature value is the highest temperature value of the battery pack in the process that the residual capacity of the battery pack is 0-100%, and the set capacity value is the residual capacity of the battery pack when the temperature of the battery pack reaches the second temperature value in the charging process;
acquiring a third temperature value of the battery pack of the vehicle under the second working condition, wherein the third temperature value is the highest temperature value of the battery pack of the vehicle under the second working condition;
comparing the first temperature value, the second temperature value and the third temperature value, determining the maximum temperature value in the first temperature value, the second temperature value and the third temperature value, and taking the maximum temperature value as a temperature threshold.
The invention provides an electronic device, which comprises:
one or more processors;
And a storage means for storing one or more programs which, when executed by the one or more processors, cause the electronic device to implement the steps of the vehicle control method described above.
The present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor of a computer, causes the computer to execute the steps of the above-described vehicle control method.
The invention has the beneficial effects that: a vehicle control method in the present invention includes: acquiring the real-time temperature of the battery pack; comparing the real-time temperature of the battery pack with a temperature threshold; when the real-time temperature of the battery pack is equal to or greater than the temperature threshold, setting a power value as a target charge-discharge power value; and controlling the vehicle at the target charge-discharge power value. In the invention, if the temperature of the battery pack of the vehicle reaches the temperature threshold value, the charging and discharging power of the battery is limited, and the vehicle is controlled by the set charging and discharging power, so that the temperature of the battery pack cannot continuously rise, thereby greatly avoiding faults caused by overhigh temperature of the battery.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
FIG. 1 is a schematic illustration of an environment in which a vehicle control method is implemented, as shown in an exemplary embodiment of the application;
FIG. 2 is a flow chart of a vehicle control method shown in an exemplary embodiment of the application;
FIG. 3 is a flow chart illustrating a determination of a temperature threshold in accordance with an exemplary embodiment of the present application;
FIG. 4 is a schematic diagram of a vehicle control apparatus shown in accordance with an exemplary embodiment of the present application;
Fig. 5 shows a schematic diagram of a computer system suitable for use in implementing an embodiment of the application.
Detailed Description
Further advantages and effects of the present invention will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In the following description, numerous details are set forth in order to provide a more thorough explanation of embodiments of the present invention, it will be apparent, however, to one skilled in the art that embodiments of the present invention may be practiced without these specific details, in other embodiments, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the embodiments of the present invention.
The optimal working temperature of the ternary lithium battery is about 25 ℃, during the charging and discharging process of the power battery, the battery core generates heat due to the fact that the internal resistance of the battery core does work, when the internal resistance of the battery core generates heat more than heat exchanged with environment, the temperature of the battery core can be gradually increased, and the situation is particularly obvious in high-temperature areas in summer. The highest working temperature of the ternary lithium battery core is about 55-60 ℃, and exceeding the temperature not only causes damage to the battery, but also is extremely easy to cause thermal runaway phenomenon to cause spontaneous combustion of the automobile or cause power interruption due to overhigh temperature of the battery core. Therefore, the battery cooling system is adopted by the medium-high-end vehicles to control the temperature of the battery, and the temperature of the battery is controlled within 50 ℃ under the general condition.
The battery cooling system is partially integrated inside the power battery pack, but the refrigerant heat interaction system is outside the battery pack and consists of a plurality of parts, and is regulated and controlled by the whole vehicle air conditioning system and TMS (THERMAL MANAGEMENT SYSTEM, TMS, thermal management system). When BMS (Battery MANAGEMENT SYSTEM, BMS) sends out cooling instruction demand of power Battery, TMS responds to control refrigerant in time so as to realize heat exchange and achieve purpose of cooling power Battery. Therefore, under the condition that TMS functions normally, the temperature of the battery can be controlled to be less than or equal to 50 ℃ in the allowable working temperature range, and the battery core is not easy to work in a high-temperature range. However, if the air conditioning system has faults or functional degradation (such as refrigerant leakage, valve failure, water pump failure and the like), the faults are not diagnosed in the TMS system. If the refrigerant leaks and is insufficient, the fault can not be reported on the traditional fuel automobile and the new energy automobile, and the diagnosis and the monitoring are difficult. At this time, the battery cooling system fails, the cooling capacity is insufficient, and if the BMS singly obeys the battery core performance parameter table to control the charging and discharging functions of the power battery, the BMS will have the risks of thermal runaway, spontaneous combustion and power interruption caused by overhigh temperature of the battery core. Therefore, the charging and discharging power of the high-temperature section of the power battery needs to be determined and controlled, and the occurrence risk of the problems is avoided.
Based on the above, the application provides a vehicle control method, which limits the charge and discharge power of a battery when the temperature of a battery pack of the vehicle reaches a temperature threshold value, and controls the vehicle with corresponding charge and discharge power, so that the temperature of the battery pack cannot continuously rise, thereby greatly avoiding faults caused by excessively high battery temperature under the condition of failure of thermal management or no thermal management.
FIG. 1 is a schematic illustration of an exemplary vehicle control method implementation environment of the present application. Referring to fig. 1, the implementation environment includes a vehicle-mounted terminal 101 and a sensor 102, where the vehicle-mounted terminal 101 and the sensor 102 are connected through a wired or wireless network to implement data interaction.
Embodiments of the present application propose a vehicle control method, a vehicle control apparatus, an electronic device, a computer-readable storage medium, respectively, which will be described in detail below.
Fig. 2 is a block diagram of a vehicle control method shown in an exemplary embodiment of the application. The method can be applied to the implementation environment shown in fig. 1, and is specifically configured in the vehicle-mounted terminal. The method may also be applied to other exemplary implementation environments and may be specifically configured in other devices, and the embodiment is not limited to the implementation environment to which the method is applied.
Referring to fig. 2, fig. 2 is a flowchart of an exemplary vehicle control method according to the present application, and it should be noted that the vehicle control method is applied to an application scenario with or without thermal management failure, and the vehicle control method at least includes steps S210 to S240, and is described in detail as follows:
Step S210, acquiring the real-time temperature of the battery pack;
Step S220, comparing the real-time temperature of the battery pack with a temperature threshold;
step S230, when the real-time temperature of the battery pack is equal to or greater than the temperature threshold value, setting a power value as a target charge-discharge power value;
step S240, controlling the vehicle at the target charge-discharge power value.
In the invention, if the temperature of the battery pack of the vehicle reaches the temperature threshold value, the charging and discharging power of the battery is limited, and the vehicle is controlled by the corresponding charging and discharging power, so that the temperature of the battery pack cannot continuously rise, thereby greatly avoiding faults caused by overhigh temperature of the battery.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The steps of the vehicle control method are described in detail below.
Step S210, acquiring the real-time temperature of the battery pack;
The temperature acquisition of the battery pack can be realized by combining a temperature sensor with a certain control circuit.
Step S220, comparing the real-time temperature of the battery pack with a temperature threshold;
The temperature threshold, namely the highest working temperature of the battery, is 55-60 ℃ for a ternary lithium battery, and exceeding the temperature not only causes damage to the battery, but also is extremely easy to cause thermal runaway phenomenon to cause spontaneous combustion of an automobile or cause power interruption due to overhigh temperature of a battery core.
Referring to fig. 3, fig. 3 is a flowchart illustrating calibration of a temperature threshold according to an exemplary embodiment of the application.
In fig. 3, the step of determining the temperature threshold includes at least steps S310 to S340, which are described in detail as follows:
Step S310, performing temperature control on the battery pack to enable the temperature of the battery pack to reach a first temperature value, where the first temperature value is: the highest temperature value of the battery pack when the vehicle is in a static state under the first working condition;
It should be noted that, the first working condition is: in the set time, the whole vehicle is in an environment of 38-42 ℃, namely, in the set time, the vehicle is placed in the environment of 38-42 ℃, under the working condition, the battery pack is collected through the temperature sensor, and the highest temperature of the battery pack is obtained when the vehicle is in a static state (the static state refers to that the vehicle meets the sleep condition and is in a resting state). The set time may be 24 hours, i.e. the vehicle is immersed for 24 hours in an environment of 38-42 ℃.
Since the vehicle remains stationary for a set period of time, the temperature of the battery pack may reach ambient temperature.
Step S320, performing charge and discharge control on the battery pack to enable the temperature of the battery pack to reach a second temperature value and the residual capacity of the battery pack to reach a set capacity value, wherein the second temperature value is the highest temperature value of the battery pack in the process that the residual capacity of the battery pack is 0-100%, and the set capacity value is the residual capacity of the battery pack when the temperature of the battery pack reaches the second temperature value in the charging process;
In step S310, the first temperature value of the vehicle under the first working condition is obtained through simulation, so before the battery pack is charged, the temperature of the battery pack needs to be controlled so that the temperature of the battery pack reaches the first temperature value.
And after the temperature of the battery pack reaches the first temperature value, performing charge and discharge control on the battery pack. Because the battery pack can generate heat in the charging process, the temperature of the corresponding battery pack can change in the whole charging process, the highest temperature value in the changing process is obtained and is recorded as a second temperature value, and the residual electric quantity of the battery corresponding to the second temperature value is recorded.
The battery pack is charged by direct current fast charging, and the battery is charged on the premise that TMS and BMS are normal in performance. Stopping charging when the temperature of the battery pack reaches a second temperature value and the residual electric quantity is a set capacity value, and immediately enabling the vehicle to work under a second working condition;
Step S330, a third temperature value of the battery pack of the vehicle under the second working condition is obtained, wherein the third temperature value is the highest temperature value of the battery pack of the vehicle under the second working condition;
in step S320, the highest temperature value of the battery pack and the remaining power of the battery at that time are determined during the process of charging the battery pack. In order to carry out the subsequent steps, the battery pack can be discharged and then charged, and in the process, when the temperature of the battery pack is a second temperature value and the residual electric quantity of the battery is a set value, the charging is stopped, and the vehicle immediately works under the second working condition.
In one embodiment, the second operating condition is:
The vehicle alternately runs under a first running condition and a second running condition, wherein the first running condition is that the vehicle runs on a horizontal road section at a first running speed, the second running condition is that the vehicle runs on a climbing road section at a second running speed, and the first running speed is larger than the second running speed. Wherein the first travel speed may be 120km/h and the second travel speed may be 40km/h. Alternate travel refers to a vehicle traveling for a certain period of time under a first travel condition, then traveling for a certain period of time under a second travel condition, and then traveling for a certain period of time under the first travel condition, and the above-described process is repeated continuously. In this process, the highest temperature of the battery, i.e., the third temperature value, is acquired.
It is understood that the first running speed may be 120km/h, the second running speed may be 40km/h, and those skilled in the art may flexibly set the first running speed and the second running speed according to actual needs, which is not further limited herein.
Step S340, comparing the first temperature value, the second temperature value and the third temperature value, determining a maximum temperature value of the first temperature value, the second temperature value and the third temperature value, and taking the maximum temperature value as a temperature threshold.
In the foregoing steps, a first temperature value, a second temperature value and a third temperature value are respectively determined, then the first temperature value, the second temperature value and the third temperature value are compared in pairs to obtain the maximum temperature value in the three temperature values, and then the maximum temperature value is used as a temperature threshold value in the use process of the vehicle under the condition that the TMS and BMS performances are normal.
After the temperature threshold value is determined, a calibration tool is utilized, and under the condition that TMS and BMS fail, a charge-discharge power value corresponding to the temperature threshold value, namely, a set power value, is set for the battery pack, wherein the set power value can be the power value when the vehicle runs at a low speed. The set power value does not raise the temperature of the battery pack, but keeps the temperature of the battery pack at or below the temperature threshold.
It can be understood that for the temperature of the battery pack to be normal, batteries of different residual amounts correspond to different charge and discharge powers for the same temperature. In the driving process, detecting a real-time temperature value and a real-time residual electric quantity of the battery pack, determining a target charge-discharge power value according to the real-time temperature value and the real-time residual electric quantity, and controlling the vehicle by the target charge-discharge power value. The real-time residual electricity of the battery pack can be estimated by adopting algorithms such as a discharge experiment method, an ampere-hour metering method, an open-circuit voltage method, a linear model method, an internal resistance method, a Kalman filtering method, a neural network method and the like.
It should be noted that, to execute the objective of determining the objective charge-discharge power value according to the real-time temperature value and the real-time residual electric quantity, it is necessary to first establish the relationship among the temperature, the charge-discharge power value, and the residual electric quantity of the battery, and complete calibration, thereby obtaining the association relationship list. Then, according to the real-time temperature, inquiring from the association relation list to obtain a plurality of charge and discharge power values corresponding to different residual electric quantities; and determining a target charge-discharge power value from the charge-discharge power values corresponding to the plurality of different residual electric quantities according to the real-time residual electric quantity.
Tables 1 and 2 are association relation list table 1 BOL cell 60s pulse charging power meter/w
| SOC/％ | 0 | 5 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 95 | 97 |
| ≤-20℃ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| -20℃ | 124 | 124 | 122 | 120 | 116 | 99 | 90 | 72 | 67 | 52 | 28 | 15 | 0 |
| -15℃ | 218 | 218 | 214 | 210 | 206 | 198 | 180 | 153 | 134 | 84 | 46 | 26 | 0 |
| -10℃ | 373 | 373 | 367 | 360 | 353 | 322 | 302 | 238 | 186 | 129 | 72 | 42 | 0 |
| -5℃ | 506 | 506 | 502 | 493 | 471 | 385 | 350 | 289 | 232 | 190 | 108 | 64 | 0 |
| 0℃ | 560 | 560 | 551 | 541 | 530 | 462 | 419 | 381 | 309 | 269 | 155 | 93 | 0 |
| 5℃ | 746 | 746 | 735 | 721 | 707 | 644 | 604 | 520 | 416 | 366 | 216 | 130 | 0 |
| 10℃ | 808 | 808 | 796 | 781 | 765 | 727 | 658 | 624 | 541 | 483 | 289 | 176 | 0 |
| 15℃ | 995 | 995 | 980 | 961 | 942 | 925 | 861 | 832 | 773 | 619 | 376 | 231 | 0 |
| 20℃ | 1166 | 1166 | 1149 | 1129 | 1128 | 1090 | 1077 | 1036 | 1027 | 771 | 467 | 283 | 0 |
| 25℃ | 1536 | 1536 | 1512 | 1483 | 1429 | 1381 | 1344 | 1318 | 1230 | 1055 | 584 | 339 | 0 |
| 30℃ | 1536 | 1536 | 1512 | 1483 | 1429 | 1381 | 1344 | 1318 | 1230 | 1055 | 584 | 339 | 0 |
| 35℃ | 1536 | 1536 | 1512 | 1483 | 1429 | 1381 | 1344 | 1318 | 1230 | 1055 | 584 | 339 | 0 |
| 40℃ | 1300 | 1300 | 1280 | 1255 | 1191 | 1151 | 1100 | 1054 | 1025 | 844 | 584 | 339 | 0 |
| 45℃ | 1119 | 1119 | 1102 | 1081 | 998 | 950 | 906 | 888 | 870 | 844 | 584 | 339 | 0 |
| 50℃ | 705 | 705 | 695 | 686 | 663 | 639 | 626 | 601 | 594 | 587 | 552 | 283 | 0 |
| 53℃ | 389 | 389 | 379 | 375 | 368 | 358 | 350 | 347 | 348 | 352 | 345 | 236 | 0 |
| 55℃ | 259 | 259 | 253 | 250 | 245 | 239 | 233 | 231 | 232 | 234 | 230 | 158 | 0 |
| ＞55℃ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
TABLE 2 BOL cell 60s pulse discharge power meter/w
| SOC/％ | 0 | 5 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 95 | 97 |
| ≤-30℃ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| -30℃ | 0 | 54 | 72 | 107 | 191 | 242 | 283 | 342 | 426 | 557 | 647 | 694 | 723 |
| -25℃ | 0 | 60 | 78 | 113 | 215 | 306 | 355 | 445 | 525 | 726 | 860 | 924 | 985 |
| -20℃ | 0 | 75 | 99 | 152 | 288 | 379 | 531 | 661 | 734 | 905 | 992 | 1055 | 1140 |
| -15℃ | 0 | 96 | 133 | 231 | 413 | 507 | 640 | 804 | 897 | 1109 | 1218 | 1288 | 1393 |
| -10℃ | 0 | 103 | 151 | 290 | 509 | 599 | 786 | 888 | 991 | 1226 | 1345 | 1423 | 1511 |
| -5℃ | 0 | 127 | 185 | 399 | 588 | 715 | 1015 | 1171 | 1317 | 1392 | 1622 | 1670 | 1734 |
| 0℃ | 0 | 162 | 234 | 457 | 754 | 948 | 1275 | 1350 | 1421 | 1491 | 1726 | 1769 | 1828 |
| 5℃ | 0 | 177 | 265 | 600 | 934 | 1111 | 1336 | 1483 | 1555 | 1626 | 1779 | 1819 | 1876 |
| 10℃ | 0 | 228 | 346 | 785 | 1059 | 1289 | 1463 | 1617 | 1690 | 1762 | 1827 | 1864 | 1919 |
| 15℃ | 0 | 292 | 446 | 1003 | 1228 | 1475 | 1583 | 1659 | 1729 | 1800 | 1862 | 1898 | 1951 |
| 20℃ | 0 | 370 | 568 | 1253 | 1334 | 1584 | 1617 | 1690 | 1759 | 1828 | 1889 | 1924 | 1975 |
| 25℃ | 0 | 458 | 709 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 30℃ | 0 | 473 | 942 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 35℃ | 0 | 533 | 1020 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 40℃ | 0 | 601 | 1020 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 45℃ | 0 | 601 | 1020 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 50℃ | 0 | 414 | 642 | 905 | 948 | 958 | 976 | 1014 | 1049 | 1085 | 1116 | 1132 | 1158 |
| 53℃ | 0 | 249 | 347 | 396 | 412 | 416 | 424 | 440 | 454 | 469 | 483 | 489 | 500 |
| 55℃ | 0 | 166 | 231 | 264 | 275 | 277 | 282 | 293 | 303 | 313 | 322 | 326 | 334 |
| ＞55℃ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
From the observations in tables 1 and 2, when the battery temperature reached 47 ℃, the battery still had a strong charge-discharge capacity, and the charge power was 700w. The maximum pulse discharge current of the battery cell 60s is 400A, and the maximum discharge power of the battery cell 60s is 1800w. According to simulation analysis, if the battery cooling system fails, the battery temperature will continue to rise upwards according to the charge-discharge capability, if the temperature is more than or equal to 55 ℃, the power battery charge-discharge power is 0, the whole vehicle will enter a power interruption state, in order to avoid the risk of generating such faults under the condition that the TMS and BMS battery cooling system fails, the charge power of > T0deg.C+2deg.C (redundancy value) in the battery charge-discharge performance parameter table can be set as P1, the discharge performance parameters are all adjusted to power P2, the normal charge and discharge of the user vehicle can be ensured, and the power interruption and the continuous rising of the battery temperature can not be caused. The optimized association relation list is shown in table 4 and 3:
TABLE 3 BOL cell 60s pulse charge power meter/w
| SOC/％ | 0 | 5 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 95 | 97 |
| ≤-20℃ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| -20℃ | 124 | 124 | 122 | 120 | 116 | 99 | 90 | 72 | 67 | 52 | 28 | 15 | 0 |
| -15℃ | 218 | 218 | 214 | 210 | 206 | 198 | 180 | 153 | 134 | 84 | 46 | 26 | 0 |
| -10℃ | 373 | 373 | 367 | 360 | 353 | 322 | 302 | 238 | 186 | 129 | 72 | 42 | 0 |
| -5℃ | 506 | 506 | 502 | 493 | 471 | 385 | 350 | 289 | 232 | 190 | 108 | 64 | 0 |
| 0℃ | 560 | 560 | 551 | 541 | 530 | 462 | 419 | 381 | 309 | 269 | 155 | 93 | 0 |
| 5℃ | 746 | 746 | 735 | 721 | 707 | 644 | 604 | 520 | 416 | 366 | 216 | 130 | 0 |
| 10℃ | 808 | 808 | 796 | 781 | 765 | 727 | 658 | 624 | 541 | 483 | 289 | 176 | 0 |
| 15℃ | 995 | 995 | 980 | 961 | 942 | 925 | 861 | 832 | 773 | 619 | 376 | 231 | 0 |
| 20℃ | 1166 | 1166 | 1149 | 1129 | 1128 | 1090 | 1077 | 1036 | 1027 | 771 | 467 | 283 | 0 |
| 25℃ | 1536 | 1536 | 1512 | 1483 | 1429 | 1381 | 1344 | 1318 | 1230 | 1055 | 584 | 339 | 0 |
| 30℃ | 1536 | 1536 | 1512 | 1483 | 1429 | 1381 | 1344 | 1318 | 1230 | 1055 | 584 | 339 | 0 |
| 35℃ | 1536 | 1536 | 1512 | 1483 | 1429 | 1381 | 1344 | 1318 | 1230 | 1055 | 584 | 339 | 0 |
| 40℃ | 1300 | 1300 | 1280 | 1255 | 1191 | 1151 | 1100 | 1054 | 1025 | 844 | 584 | 339 | 0 |
| 45℃ | 1119 | 1119 | 1102 | 1081 | 998 | 950 | 906 | 888 | 870 | 844 | 584 | 339 | 0 |
| 50℃ | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | 0 |
| 53℃ | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | 0 |
| 55℃ | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | P1 | 0 |
| ＞55℃ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
TABLE 4 BOL cell 60s pulse discharge power meter/w
| SOC/％ | 0 | 5 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 95 | 97 |
| ≤-30℃ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| -30℃ | 0 | 54 | 72 | 107 | 191 | 242 | 283 | 342 | 426 | 557 | 647 | 694 | 723 |
| -25℃ | 0 | 60 | 78 | 113 | 215 | 306 | 355 | 445 | 525 | 726 | 860 | 924 | 985 |
| -20℃ | 0 | 75 | 99 | 152 | 288 | 379 | 531 | 661 | 734 | 905 | 992 | 1055 | 1140 |
| -15℃ | 0 | 96 | 133 | 231 | 413 | 507 | 640 | 804 | 897 | 1109 | 1218 | 1288 | 1393 |
| -10℃ | 0 | 103 | 151 | 290 | 509 | 599 | 786 | 888 | 991 | 1226 | 1345 | 1423 | 1511 |
| -5℃ | 0 | 127 | 185 | 399 | 588 | 715 | 1015 | 1171 | 1317 | 1392 | 1622 | 1670 | 1734 |
| 0℃ | 0 | 162 | 234 | 457 | 754 | 948 | 1275 | 1350 | 1421 | 1491 | 1726 | 1769 | 1828 |
| 5℃ | 0 | 177 | 265 | 600 | 934 | 1111 | 1336 | 1483 | 1555 | 1626 | 1779 | 1819 | 1876 |
| 10℃ | 0 | 228 | 346 | 785 | 1059 | 1289 | 1463 | 1617 | 1690 | 1762 | 1827 | 1864 | 1919 |
| 15℃ | 0 | 292 | 446 | 1003 | 1228 | 1475 | 1583 | 1659 | 1729 | 1800 | 1862 | 1898 | 1951 |
| 20℃ | 0 | 370 | 568 | 1253 | 1334 | 1584 | 1617 | 1690 | 1759 | 1828 | 1889 | 1924 | 1975 |
| 25℃ | 0 | 458 | 709 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 30℃ | 0 | 473 | 942 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 35℃ | 0 | 533 | 1020 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 40℃ | 0 | 601 | 1020 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 45℃ | 0 | 601 | 1020 | 1322 | 1510 | 1605 | 1641 | 1713 | 1781 | 1849 | 1909 | 1942 | 1993 |
| 50℃ | 0 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 |
| 53℃ | 0 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 |
| 55℃ | 0 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 | P2 |
| ＞55℃ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Step S240, controlling the vehicle at the target charge-discharge power value.
When the temperature of the battery is higher than the temperature threshold, a user can run the vehicle to a 4S store at a low speed according to the determined target charge-discharge power value to conduct problem checking, and faults caused by the overtemperature of the battery are greatly avoided.
In summary, a vehicle control method according to the present invention includes: acquiring the real-time temperature of the battery pack; comparing the real-time temperature of the battery pack with a temperature threshold; when the real-time temperature of the battery pack is equal to or greater than the temperature threshold, setting a power value as a target charge-discharge power value; and controlling the vehicle at the target charge-discharge power value. In the invention, if the temperature of the battery pack of the vehicle reaches the temperature threshold value, the charging and discharging power of the battery is limited, and the vehicle is controlled by the set charging and discharging power, so that the temperature of the battery pack cannot continuously rise, thereby greatly avoiding faults caused by overhigh temperature of the battery. In the invention, if the temperature of the battery pack of the vehicle reaches the temperature threshold value, the charging and discharging power of the battery is limited, and the vehicle is controlled by the corresponding charging and discharging power, so that the temperature of the battery pack cannot continuously rise, thereby greatly avoiding faults caused by overhigh temperature of the battery.
Referring to fig. 4, fig. 4 is a block diagram of a vehicle control apparatus according to an exemplary embodiment of the present application. The device can be applied to the implementation environment shown in fig. 1 and is specifically configured in a terminal device. The apparatus may also be adapted to other exemplary implementation environments and may be specifically configured in other devices, and the present embodiment is not limited to the implementation environments to which the apparatus is adapted.
As shown in fig. 4, the present application provides a vehicle control device applied to an application scenario where thermal management fails or there is no thermal management, the device including:
a temperature acquisition module 410 for acquiring a real-time temperature of the battery pack;
a comparison module 420 for comparing the real-time temperature of the battery pack with a temperature threshold;
a charge-discharge power value determining module 430, configured to set a power value as a target charge-discharge power value when the real-time temperature of the battery pack is equal to or greater than the temperature threshold;
a control module 440 for controlling the vehicle at the target charge-discharge power value.
In an embodiment, the step of calibrating the temperature threshold includes:
and controlling the temperature of the battery pack to enable the temperature of the battery pack to reach a first temperature value, wherein the first temperature value is as follows: the highest temperature value of the battery pack when the vehicle is in a static state under the first working condition;
Performing charge and discharge control on the battery pack to enable the temperature of the battery pack to reach a second temperature value and the residual capacity of the battery pack to reach a set capacity value, wherein the second temperature value is the highest temperature value of the battery pack in the process that the residual capacity of the battery pack is 0-100%, and the set capacity value is the residual capacity of the battery pack when the temperature of the battery pack reaches the second temperature value in the charging process;
acquiring a third temperature value of the battery pack of the vehicle under the second working condition, wherein the third temperature value is the highest temperature value of the battery pack of the vehicle under the second working condition;
comparing the first temperature value, the second temperature value and the third temperature value, determining the maximum temperature value in the first temperature value, the second temperature value and the third temperature value, and taking the maximum temperature value as a temperature threshold.
It should be noted that, the vehicle control device provided in the foregoing embodiment and the vehicle control method provided in the foregoing embodiment belong to the same concept, and a specific manner in which each module and unit perform an operation has been described in detail in the method embodiment, which is not described herein again. In practical application, the vehicle control device provided in the above embodiment may distribute the functions to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above, which is not limited herein.
The embodiment of the application also provides electronic equipment, which comprises: one or more processors; and a storage means for storing one or more programs that, when executed by the one or more processors, cause the electronic device to implement the vehicle control method provided in the respective embodiments described above.
Fig. 5 shows a schematic diagram of a computer system suitable for use in implementing an embodiment of the application. It should be noted that, the computer system of the electronic device shown in fig. 5 is only an example, and should not impose any limitation on the functions and the application scope of the embodiments of the present application.
As shown in fig. 5, the computer system includes a central processing unit (Central Processing Unit, CPU) that can perform various appropriate actions and processes, such as performing the methods described in the above embodiments, according to a program stored in a Read-Only Memory (ROM) or a program loaded from a storage section into a random access Memory (Random Access Memory, RAM). In the RAM, various programs and data required for the system operation are also stored. The CPU, ROM and RAM are connected to each other by a bus. An Input/Output (I/O) interface is also connected to the bus.
The following components are connected to the I/O interface: an input section including a keyboard, a mouse, etc.; an output section including a Cathode Ray Tube (CRT), a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD), and a speaker; a storage section including a hard disk or the like; and a communication section including a network interface card such as a LAN (Local AreaNetwork ) card, a modem, or the like. The communication section performs communication processing via a network such as the internet. The drives are also connected to the I/O interfaces as needed. Removable media such as magnetic disks, optical disks, magneto-optical disks, semiconductor memories, and the like are mounted on the drive as needed so that a computer program read therefrom is mounted into the storage section as needed.
In particular, according to embodiments of the present application, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising a computer program for performing the method shown in flowchart 2. In such embodiments, the computer program may be downloaded and installed from a network via a communication portion, and/or installed from a removable medium. When being executed by a Central Processing Unit (CPU), performs the various functions defined in the system of the present application.
It should be noted that, the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium may be, for example, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory, EPROM), a flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer-readable signal medium may comprise a data signal propagated in baseband or as part of a carrier wave, with a computer-readable computer program embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. A computer program embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units involved in the embodiments of the present application may be implemented by software, or may be implemented by hardware, and the described units may also be provided in a processor. Wherein the names of the units do not constitute a limitation of the units themselves in some cases.
Another aspect of the application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor of a computer, causes the computer to perform the vehicle control method as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiment or may exist alone without being incorporated in the electronic device.
Another aspect of the application also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions so that the computer device executes the vehicle control method provided in the above-described respective embodiments.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. It is therefore intended that all equivalent modifications and changes made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the appended claims.
Claims (8)
1. A vehicle control method, characterized in that the method comprises:
Acquiring the real-time temperature of the battery pack;
comparing the real-time temperature of the battery pack with a temperature threshold;
when the real-time temperature of the battery pack is equal to or greater than the temperature threshold, setting a power value as a target charge-discharge power value;
controlling the vehicle at the target charge-discharge power value;
the calibration step of the temperature threshold comprises the following steps:
and controlling the temperature of the battery pack to enable the temperature of the battery pack to reach a first temperature value, wherein the first temperature value is as follows: the highest temperature value of the battery pack when the vehicle is in a static state under the first working condition;
Performing charge and discharge control on the battery pack to enable the temperature of the battery pack to reach a second temperature value and the residual capacity of the battery pack to reach a set capacity value, wherein the second temperature value is the highest temperature value of the battery pack in the process that the residual capacity of the battery pack is 0-100%, and the set capacity value is the residual capacity of the battery pack when the temperature of the battery pack reaches the second temperature value in the charging process;
acquiring a third temperature value of the battery pack of the vehicle under the second working condition, wherein the third temperature value is the highest temperature value of the battery pack of the vehicle under the second working condition;
comparing the first temperature value, the second temperature value and the third temperature value, determining the maximum temperature value in the first temperature value, the second temperature value and the third temperature value, and taking the maximum temperature value as a temperature threshold.
2. The vehicle control method according to claim 1, characterized in that the first operating condition is: within the set time, the whole vehicle is in an environment of 38-42 ℃.
3. The vehicle control method according to claim 1, characterized in that the second operating condition is:
The vehicle alternately runs under a first running condition and a second running condition, wherein the first running condition is that the vehicle runs on a horizontal road section at a first running speed, the second running condition is that the vehicle runs on a climbing road section at a second running speed, and the first running speed is larger than the second running speed.
4. The vehicle control method according to claim 1, characterized in that the set power value is a charge-discharge power value that makes a real-time temperature of the battery pack not greater than a temperature threshold.
5. The vehicle control method according to claim 4, wherein the calibration of the set power value is performed in an application scenario where thermal management fails or there is no thermal management.
6. A vehicle control apparatus, characterized in that the apparatus comprises:
The temperature acquisition module is used for acquiring the real-time temperature of the battery pack;
the comparison module is used for comparing the real-time temperature of the battery pack with a temperature threshold value;
the charge-discharge power value determining module is used for taking the set power value as a target charge-discharge power value when the real-time temperature of the battery pack is equal to or greater than the temperature threshold value;
the control module is used for controlling the vehicle at the target charge-discharge power value;
the calibration step of the temperature threshold comprises the following steps:
and controlling the temperature of the battery pack to enable the temperature of the battery pack to reach a first temperature value, wherein the first temperature value is as follows: the highest temperature value of the battery pack when the vehicle is in a static state under the first working condition;
Performing charge and discharge control on the battery pack to enable the temperature of the battery pack to reach a second temperature value and the residual capacity of the battery pack to reach a set capacity value, wherein the second temperature value is the highest temperature value of the battery pack in the process that the residual capacity of the battery pack is 0-100%, and the set capacity value is the residual capacity of the battery pack when the temperature of the battery pack reaches the second temperature value in the charging process;
acquiring a third temperature value of the battery pack of the vehicle under the second working condition, wherein the third temperature value is the highest temperature value of the battery pack of the vehicle under the second working condition;
comparing the first temperature value, the second temperature value and the third temperature value, determining the maximum temperature value in the first temperature value, the second temperature value and the third temperature value, and taking the maximum temperature value as a temperature threshold.
7. An electronic device, the electronic device comprising:
one or more processors;
Storage means for storing one or more programs that when executed by the one or more processors cause the electronic device to implement the steps of the vehicle control method of any one of claims 1-5.
8. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor of a computer, causes the computer to perform the steps of the vehicle control method according to any one of claims 1 to 5.
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| CN108674198A (en) * | 2018-04-19 | 2018-10-19 | 浙江吉利控股集团有限公司 | A kind of thermal management device of battery and battery thermal management method of extended-range electric vehicle |
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