CN113752906A - Thermal management control method and device for electric vehicle battery - Google Patents
Thermal management control method and device for electric vehicle battery Download PDFInfo
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- CN113752906A CN113752906A CN202111163711.7A CN202111163711A CN113752906A CN 113752906 A CN113752906 A CN 113752906A CN 202111163711 A CN202111163711 A CN 202111163711A CN 113752906 A CN113752906 A CN 113752906A
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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
- B60L58/26—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 cooling
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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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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- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a thermal management control method and device for an electric vehicle battery. The invention comprises the following steps: judging whether the electric vehicle meets a first condition and a second condition, wherein the first condition is that the current temperature of a battery of the electric vehicle is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value; judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition; and under the condition that the electric vehicle is in a charging state, controlling a compressor of the electric vehicle to be started, wherein the starting power of the compressor is in direct proportion to the first temperature difference. The invention solves the technical problem that the whole vehicle is greatly damaged because the switch of the compressor is controlled only by the temperature of the battery as the condition in the prior art.
Description
Technical Field
The invention relates to the field of battery control, in particular to a thermal management control method and device for an electric vehicle battery.
Background
The thermal management system of the battery plays a vital role in the aspects of the safety of the battery and even the whole vehicle, and mainly plays a role in cooling and heating the battery. At present, a main battery loop heat management system comprises a positive temperature coefficient thermistor (PTC), a compressor, an electronic expansion valve, a water tank and the like, and when the temperature is higher than the set temperature, the compressor is started to cool the battery.
Whether the compressor is started or not is judged only through the temperature, and the battery is not strictly refrigerated, so that the temperature control target of the battery is realized, but the battery is not a good choice in the aspects of safety and energy consumption of the whole vehicle. Meanwhile, if the compressor is turned on only when the temperature rises, the compressor is turned off when the temperature drops, the compressor is turned on repeatedly, electric appliances of the whole vehicle are damaged, and the noise of the whole vehicle is large.
In view of the above problems in the related art, no effective solution has been proposed.
Disclosure of Invention
The invention mainly aims to provide a thermal management control method and a thermal management control device for an electric vehicle battery, and aims to solve the technical problem that the whole vehicle is greatly damaged due to the fact that the compressor is controlled to be switched on and off only by taking the temperature of the battery as a condition in the related art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a thermal management control method of an electric vehicle battery. The invention comprises the following steps: judging whether the electric vehicle meets a first condition and a second condition, wherein the first condition is that the current temperature of a battery of the electric vehicle is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value; judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition; and under the condition that the electric vehicle is in a charging state, controlling a compressor of the electric vehicle to be started, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
Further, in the case where the electric vehicle is in an uncharged state, the method further comprises: judging whether the available power of the battery of the electric vehicle is more than or equal to the total required power, wherein the total required power is the sum of the required power of the compressor and the driving power of the electric vehicle; and controlling the compressor to be started under the condition that the available power is greater than or equal to the total power demand, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
Further, in the case that the available power of the electric vehicle battery is less than the total power demand, the method further comprises: judging whether the current temperature of the electric vehicle battery is greater than or equal to a second preset temperature value or not; and under the condition that the current temperature is greater than or equal to a second preset temperature value, distributing a first part of available power to the compressor, and distributing the rest of the available power to a driving mechanism of the electric vehicle, wherein the first part of available power is required power of the compressor.
Further, in the case that the current temperature is less than a second preset temperature value, the method further includes: and distributing a second part of the available power to a driving mechanism of the electric vehicle and distributing the rest of the available power to the compressor, wherein the second part of the available power is the required power of the driving mechanism.
Further, after distributing a second portion of the available power to a drive mechanism of the electric vehicle and distributing the remaining of the available power to the compressor, the method comprises: judging whether a second temperature difference between the current temperature of the electric vehicle battery and a second preset temperature is smaller than a third preset temperature value or not; and controlling the compressor to be closed under the condition that the second temperature difference is smaller than a third preset temperature value.
Further, after controlling the compressor of the electric vehicle to be turned on while the electric vehicle is in the charging state, the method further includes: and judging whether the current temperature of the electric vehicle battery is less than a third preset temperature value or not, and if so, controlling the compressor to be closed.
Further, after distributing a first part of the available power to the compressor and distributing the rest of the available power to the driving mechanism of the electric vehicle when the current temperature is greater than or equal to a second preset temperature value, the method further comprises: judging whether the electric vehicle meets any one of a third condition and a fourth condition, if so, judging whether a third temperature difference between the current temperature of the electric vehicle battery and a second preset temperature value is smaller than a third preset temperature value, wherein the third condition is that the current available power of the compressor is smaller than the minimum power of the compressor, and the fourth condition is that the third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than the third preset temperature value; and controlling the compressor to be closed under the condition that whether a third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than a third preset temperature value or not.
In order to achieve the above object, according to another aspect of the present invention, there is provided a thermal management control apparatus for a battery of an electric vehicle. The device includes: the first judging unit is used for judging whether the electric vehicle meets a first condition and a second condition, wherein the first condition is that the current temperature of a battery of the electric vehicle is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value; the second judging unit is used for judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition; the first control unit is used for controlling the compressor of the electric vehicle to be started under the condition that the electric vehicle is in a charging state, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
In order to achieve the above object, according to another aspect of the present application, there is provided a computer-readable storage medium including a stored program, wherein the program executes a thermal management control method of an electric vehicle battery according to any one of the above.
In order to achieve the above object, according to another aspect of the present application, there is provided a processor for executing a program, wherein the program executes a thermal management control method of an electric vehicle battery according to any one of the above.
The invention adopts the following steps: judging whether the electric vehicle meets a first condition and a second condition, wherein the first condition is that the current temperature of a battery of the electric vehicle is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value; judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition; under the condition that the electric vehicle is in a charging state, the compressor of the electric vehicle is controlled to be started, wherein the starting power of the compressor is in direct proportion to the first temperature difference, and the technical problem that the whole vehicle is greatly damaged due to the fact that the compressor is controlled to be switched on and off only through the temperature of the battery in the related art is solved. Therefore, the strategy of optimizing the repeated opening of the PTC and the compressor is achieved, the battery is protected, and the energy consumption of the whole vehicle is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a thermal management control method for an electric vehicle battery according to an embodiment of the present invention;
fig. 2 is a flowchart of another method for controlling thermal management of a battery of an electric vehicle according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a thermal management control device for an electric vehicle battery according to an embodiment of the invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions of the present invention better understood, 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to the embodiment of the invention, a thermal management control method for an electric vehicle battery is provided.
Fig. 1 is a flowchart of a thermal management control method for an electric vehicle battery according to an embodiment of the invention. As shown in fig. 1, the present invention comprises the steps of:
step S101, judging whether the electric vehicle meets a first condition and a second condition, wherein the first condition is that the current temperature of the electric vehicle battery is greater than or equal to a first preset temperature, the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value, and preferably, the first preset temperature value is 5 ℃.
Comparing the current temperature of the electric vehicle battery with a preset temperature, and reaching a first condition when the current temperature of the electric vehicle battery is greater than or equal to a first preset temperature; and when the first temperature difference between the current temperature of the electric vehicle battery and the second preset temperature is greater than or equal to the first preset temperature value, a second condition is reached.
And step S102, judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition.
Specifically, when the current battery temperature T0 of the electric vehicle rises or exceeds a first preset temperature T1 and a first temperature difference with a second preset temperature T2 of T0 is greater than a first preset temperature value, the battery satisfies a first condition and a second condition, and under the condition that the first condition and the second condition are satisfied, whether the electric vehicle is in a charging state is judged.
And S103, controlling a compressor of the electric vehicle to be started under the condition that the electric vehicle is in a charging state, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
And if the electric vehicle is in a charging state, controlling the compressor to be started, wherein the larger the first temperature difference is, the larger the starting power of the compressor is, and the specific proportional relation is formed.
Above-mentioned, this application is based on current battery return circuit thermal management system, through the setting between the hysteresis interval, fine protection the compressor, avoided the problem that the compressor was opened repeatedly, better utilization the electric quantity of battery cool down for the battery.
Further, in an optional example, after controlling the compressor of the electric vehicle to be turned on while the electric vehicle is in the charging state, the method further includes: and judging whether the current temperature of the electric vehicle battery is less than a third preset temperature value or not, and if so, controlling the compressor to be closed.
Specifically, after the compressor is controlled to be started, preferably, after the compressor is started for a period of time, whether the current temperature of the electric vehicle battery is lower than a third preset temperature value is judged, preferably, the third preset temperature value is-3 ℃, and if yes, the compressor is controlled to be stopped.
Above-mentioned, this application has made the improvement to current battery return circuit thermal management system, and the setting of hysteresis interval in addition, fine protection the compressor, avoided the problem that the compressor was opened repeatedly, better utilization the electric quantity of battery and cooled down for the battery. The electric quantity and the temperature of the battery are respectively judged to control the opening, closing and opening power of the compressor to control in the running state and the charging state, the battery is more effectively protected in the running state and the charging state, the actual driving requirement and feeling of a driver are close to, the vibration and the noise of the whole vehicle are effectively reduced, and the battery can be balanced and cooled in the running state.
In an optional example, in a case where the electric vehicle is in an uncharged state, the method further comprises: judging whether the available power of the battery of the electric vehicle is more than or equal to the total required power, wherein the total required power is the sum of the required power of the compressor and the driving power of the electric vehicle; and controlling the compressor to be started under the condition that the available power is greater than or equal to the total power demand, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
In an alternative example, in the case that the available power of the battery of the electric vehicle is less than the total power demand, the method further comprises: judging whether the current temperature of the electric vehicle battery is greater than or equal to a second preset temperature value (risk temperature value) or not; and distributing a first part of available power to the compressor and distributing the rest of the available power to a driving mechanism of the electric vehicle under the condition that the current temperature is greater than or equal to a second preset temperature value (risk temperature value), wherein the first part of available power is the required power of the compressor.
In the above, under the condition that the electric vehicle meets the first condition and the second condition, if the electric vehicle is in an uncharged state, it is determined whether the available power of the electric vehicle battery is greater than or equal to the sum of the required power of the compressor and the driving power of the electric vehicle, and if so, the compressor is turned on, and the turning-on power of the compressor is in direct proportion to the first temperature difference.
Further, under the condition that the available power of the battery of the electric vehicle is smaller than the required total power, whether the current temperature of the battery is larger than or equal to a second preset temperature value (risk temperature value) or not is judged, if yes, the available power of the battery is preferentially distributed to the compressor, and the residual power is distributed to the driving mechanism.
In an optional example, in case that the current temperature is less than a second preset temperature value (risk temperature value), the method further comprises: and distributing a second part of the available power to a driving mechanism of the electric vehicle and distributing the rest of the available power to the compressor, wherein the second part of the available power is the required power of the driving mechanism.
Further, in the case where the current temperature is less than a second preset temperature value (risk temperature value), the available power of the battery is preferentially allocated to the drive, the remainder is allocated to the compressor, and the process proceeds to the next step.
In an alternative example, after distributing a second portion of the available power to a drive mechanism of the electric vehicle and distributing the remaining portion of the available power to the compressor, the method includes: judging whether a second temperature difference between the current temperature of the electric vehicle battery and a second preset temperature is smaller than a third preset temperature value or not; and controlling the compressor to be closed under the condition that the second temperature difference is smaller than a third preset temperature value.
Further, after distributing a second part of the available power to a driving mechanism of the electric vehicle and distributing the rest of the available power to the compressor, judging whether the second temperature difference is smaller than a third preset temperature value, preferably, the third preset temperature value is-3 ℃, and if so, controlling the compressor to be closed.
In an alternative example, after distributing a first part of the available power to the compressor and distributing the rest of the available power to the driving mechanism of the electric vehicle in the case that the current temperature is greater than or equal to a second preset temperature value, the method further comprises: judging whether the electric vehicle meets any one of a third condition and a fourth condition, if so, judging whether a third temperature difference between the current temperature of the electric vehicle battery and a second preset temperature value is smaller than a third preset temperature value, wherein the third condition is that the current available power of the compressor is smaller than the minimum power of the compressor, and the fourth condition is that the third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than the third preset temperature value; and controlling the compressor to be closed under the condition that whether a third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than a third preset temperature value or not.
And when the third temperature difference between the current temperature of the motor car battery and the second preset temperature value is smaller than the third preset temperature value, the compressor is closed.
Fig. 2 is a flowchart of another method for controlling thermal management of an electric vehicle battery according to an embodiment of the present application, where the specific flowchart is shown in fig. 2:
step 1: judging whether the current temperature of the battery is increased or exceeds a first preset temperature, if so, turning to the step 2, and if not, turning to the step 1;
step 2: calculating a first temperature difference Tdif between the current temperature and a second preset temperature, and turning to the step 3;
and step 3: judging whether the first temperature difference Tdif is larger than 5 ℃, if so, turning to the step 4, and if not, turning to the step 1;
and 4, step 4: judging whether the whole vehicle is in a charging state or not, if so, turning to the step 5, and if not, turning to the step 6;
and 5: controlling the compressor to be started, wherein the temperature difference Tdif is larger, the starting power of the compressor is larger, and turning to the step 7 after the compressor is started;
step 6: judging whether the available power of the battery is more than or equal to the sum of the required power of the compressor and the driving power, if so, turning to the step 5, and if not, turning to the step 9;
and 7: judging a second temperature difference Tdif between the current temperature of the battery and a second preset temperature, judging that Tdif is less than-3, if so, turning to the step 8, otherwise, turning to the step 5;
and 8: the compressor is shut down;
and step 9: judging that the current battery temperature is larger than or equal to the risk value temperature, if so, turning to the step 10, and if not, turning to the step 11;
step 10: preferentially distributing the available power of the battery to the compressor, distributing the residual power to the drive, and turning to step 12;
step 11: preferentially distributing the available power of the battery to the drive, distributing the rest to the compressor, and turning to the step 13;
step 12: judging whether the available power of the battery is smaller than the minimum power of the compressor or the second temperature difference Tdif between the current battery temperature and the second preset temperature is less than-3 ℃, if so, turning to the step 13, and if not, turning to the step 9;
step 13: and (4) judging that the second temperature difference Tdif is less than-3 ℃, if so, turning to the step 8, and if not, turning to the step 9.
By the method, the compressor is well protected by closed-loop control and setting of the hysteresis interval, and the temperature of the battery is effectively controlled; meanwhile, the opening, closing and opening power of the compressor are controlled by respectively judging the electric quantity and the temperature of the battery in the driving and charging states, so that the battery is more effectively protected in the driving and charging states, and the actual driving requirements and feelings of a driver are also more met.
According to the thermal management control method for the electric vehicle battery, whether the electric vehicle meets a first condition and a second condition is judged, the first condition is that the current temperature of the electric vehicle battery is larger than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is larger than or equal to a first preset temperature value; judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition; under the condition that the electric vehicle is in a charging state, the compressor of the electric vehicle is controlled to be started, wherein the starting power of the compressor is in direct proportion to the first temperature difference, and the technical problem that the whole vehicle is greatly damaged due to the fact that the compressor is controlled to be switched on and off only through the temperature of the battery in the related art is solved. Therefore, the strategy of optimizing the repeated opening of the PTC and the compressor is achieved, the battery is protected, and the energy consumption of the whole vehicle is reduced.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
The embodiment of the invention also provides a thermal management control device for the battery of the electric automobile, and it should be noted that the thermal management control device for the battery of the electric automobile provided by the embodiment of the invention can be used for executing the thermal management control method for the battery of the electric automobile provided by the embodiment of the invention. The following describes a thermal management control device for an electric vehicle battery according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a thermal management control device for an electric vehicle battery according to an embodiment of the invention. As shown in fig. 3, the apparatus includes: a first judging unit 301, configured to judge whether the electric vehicle meets a first condition and a second condition, where the first condition is that a current temperature of a battery of the electric vehicle is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value; a second determining unit 302, configured to determine whether the electric vehicle is in a charging state when the electric vehicle meets the first condition and the second condition; the first control unit 303 is configured to control a compressor of the electric vehicle to be turned on when the electric vehicle is in a charging state, wherein an on-power of the compressor is proportional to the first temperature difference.
In an optional example, the apparatus further comprises: a second determining unit 302, configured to determine whether available power of a battery of the electric vehicle is greater than or equal to a total required power when the electric vehicle is in an uncharged state, where the total required power is a sum of a required power of the compressor and a driving power of the electric vehicle; and the second control unit is used for controlling the compressor to be started under the condition that the available power is more than or equal to the total power required, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
In an optional example, the apparatus further comprises: the third judging unit is used for judging whether the current temperature of the electric vehicle battery is greater than or equal to a second preset temperature value or not under the condition that the available power of the electric vehicle battery is smaller than the required total power; and the first distribution unit is used for distributing a first part of available power to the compressor and distributing the rest of the available power to a driving mechanism of the electric vehicle under the condition that the current temperature is greater than or equal to a second preset temperature value, wherein the first part of available power is the required power of the compressor.
In an optional example, the apparatus further comprises: and the second distribution unit is used for distributing a second part of the available power to a driving mechanism of the electric vehicle and distributing the rest of the available power to the compressor under the condition that the current temperature is lower than a second preset temperature value, wherein the second part of the available power is the required power of the driving mechanism.
In an optional example, the apparatus further comprises: a fourth judging unit for judging whether a second temperature difference between the current temperature of the battery of the electric vehicle and the second preset temperature is less than a third preset temperature value after distributing a second part of the available power to the driving mechanism of the electric vehicle and distributing the remaining power of the available power to the compressor; and the third control unit is used for controlling the compressor to be closed under the condition that the second temperature difference is smaller than a third preset temperature value.
In an optional example, the apparatus further comprises: and the fifth judging unit is used for judging whether the current temperature of the battery of the electric vehicle is less than a third preset temperature value or not after controlling the compressor of the electric vehicle to be started under the condition that the electric vehicle is in a charging state, and controlling the compressor to be closed if the current temperature of the battery of the electric vehicle is less than the third preset temperature value.
In an optional example, the apparatus further comprises: a sixth judging unit, configured to, when the current temperature is greater than or equal to a second preset temperature value, allocate a first portion of power in the available power to the compressor, and allocate the remaining power in the available power to a driving mechanism of the electric vehicle, and then judge whether the electric vehicle satisfies any one of a third condition and a fourth condition, and if so, judge whether a third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than a third preset temperature value, where the third condition is that the current available power of the compressor is smaller than the minimum power of the compressor, and the fourth condition is that a third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than the third preset temperature value; and the fourth control unit is used for controlling the compressor to be closed under the condition that whether a third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than a third preset temperature value or not.
According to the thermal management control device for the electric vehicle battery, provided by the embodiment of the invention, whether the electric vehicle meets a first condition and a second condition is judged, wherein the first condition is that the current temperature of the electric vehicle battery is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value; judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition; under the condition that the electric vehicle is in a charging state, the compressor of the electric vehicle is controlled to be started, wherein the starting power of the compressor is in direct proportion to the first temperature difference, and the technical problem that the whole vehicle is greatly damaged due to the fact that the compressor is controlled to be switched on and off only through the temperature of the battery in the related art is solved. Therefore, the strategy of optimizing the repeated opening of the PTC and the compressor is achieved, the battery is protected, and the energy consumption of the whole vehicle is reduced.
The first judging unit 201 and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and the technical problem that the whole vehicle is damaged greatly due to the fact that the switch of the compressor is controlled only by taking the temperature of the battery as a condition in the related technology is solved by adjusting the kernel parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
The embodiment of the invention provides a computer-readable storage medium, wherein a program is stored on the computer-readable storage medium, and the program is used for realizing the thermal management control method of the electric vehicle battery when being executed by a processor.
The embodiment of the invention provides a processor, which is used for running a program, wherein the program executes the thermal management control method of the electric vehicle battery when running.
An embodiment of the present invention provides an apparatus, where the apparatus includes a processor, a computer-readable storage medium, and a program stored on the computer-readable storage medium and executable on the processor, and the processor implements the following steps when executing the program: judging whether the electric vehicle meets a first condition and a second condition, wherein the first condition is that the current temperature of a battery of the electric vehicle is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value; judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition; and under the condition that the electric vehicle is in a charging state, controlling a compressor of the electric vehicle to be started, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
In an optional example, in a case where the electric vehicle is in an uncharged state, the method further comprises: judging whether the available power of the battery of the electric vehicle is more than or equal to the total required power, wherein the total required power is the sum of the required power of the compressor and the driving power of the electric vehicle; and controlling the compressor to be started under the condition that the available power is greater than or equal to the total power demand, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
In an alternative example, in the case that the available power of the battery of the electric vehicle is less than the total power demand, the method further comprises: judging whether the current temperature of the electric vehicle battery is greater than or equal to a second preset temperature value or not; and under the condition that the current temperature is greater than or equal to a second preset temperature value, distributing a first part of available power to the compressor, and distributing the rest of the available power to a driving mechanism of the electric vehicle, wherein the first part of available power is required power of the compressor.
In an optional example, in a case that the current temperature is less than a second preset temperature value, the method further includes: and distributing a second part of the available power to a driving mechanism of the electric vehicle and distributing the rest of the available power to the compressor, wherein the second part of the available power is the required power of the driving mechanism.
In an alternative example, after distributing a second portion of the available power to a drive mechanism of the electric vehicle and distributing the remaining portion of the available power to the compressor, the method includes: judging whether a second temperature difference between the current temperature of the electric vehicle battery and a second preset temperature is smaller than a third preset temperature value or not; and controlling the compressor to be closed under the condition that the second temperature difference is smaller than a third preset temperature value.
In an optional example, after controlling a compressor of the electric vehicle to be turned on while the electric vehicle is in a charging state, the method further includes: and judging whether the current temperature of the electric vehicle battery is less than a third preset temperature value or not, and if so, controlling the compressor to be closed.
In an alternative example, after distributing a first part of the available power to the compressor and distributing the rest of the available power to the driving mechanism of the electric vehicle in the case that the current temperature is greater than or equal to a second preset temperature value, the method further comprises: judging whether the electric vehicle meets any one of a third condition and a fourth condition, if so, judging whether a third temperature difference between the current temperature of the electric vehicle battery and a second preset temperature value is smaller than a third preset temperature value, wherein the third condition is that the current available power of the compressor is smaller than the minimum power of the compressor, and the fourth condition is that the third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than the third preset temperature value; and controlling the compressor to be closed under the condition that whether a third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than a third preset temperature value or not.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The invention also provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: judging whether the electric vehicle meets a first condition and a second condition, wherein the first condition is that the current temperature of a battery of the electric vehicle is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value; judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition; and under the condition that the electric vehicle is in a charging state, controlling a compressor of the electric vehicle to be started, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
In an optional example, in a case where the electric vehicle is in an uncharged state, the method further comprises: judging whether the available power of the battery of the electric vehicle is more than or equal to the total required power, wherein the total required power is the sum of the required power of the compressor and the driving power of the electric vehicle; and controlling the compressor to be started under the condition that the available power is greater than or equal to the total power demand, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
In an alternative example, in the case that the available power of the battery of the electric vehicle is less than the total power demand, the method further comprises: judging whether the current temperature of the electric vehicle battery is greater than or equal to a second preset temperature value or not; and under the condition that the current temperature is greater than or equal to a second preset temperature value, distributing a first part of available power to the compressor, and distributing the rest of the available power to a driving mechanism of the electric vehicle, wherein the first part of available power is required power of the compressor.
In an optional example, in a case that the current temperature is less than a second preset temperature value, the method further includes: and distributing a second part of the available power to a driving mechanism of the electric vehicle and distributing the rest of the available power to the compressor, wherein the second part of the available power is the required power of the driving mechanism.
In an alternative example, after distributing a second portion of the available power to a drive mechanism of the electric vehicle and distributing the remaining portion of the available power to the compressor, the method includes: judging whether a second temperature difference between the current temperature of the electric vehicle battery and a second preset temperature is smaller than a third preset temperature value or not; and controlling the compressor to be closed under the condition that the second temperature difference is smaller than a third preset temperature value.
In an optional example, after controlling a compressor of the electric vehicle to be turned on while the electric vehicle is in a charging state, the method further includes: and judging whether the current temperature of the electric vehicle battery is less than a third preset temperature value or not, and if so, controlling the compressor to be closed.
In an alternative example, after distributing a first part of the available power to the compressor and distributing the rest of the available power to the driving mechanism of the electric vehicle in the case that the current temperature is greater than or equal to a second preset temperature value, the method further comprises: judging whether the electric vehicle meets any one of a third condition and a fourth condition, if so, judging whether a third temperature difference between the current temperature of the electric vehicle battery and a second preset temperature value is smaller than a third preset temperature value, wherein the third condition is that the current available power of the compressor is smaller than the minimum power of the compressor, and the fourth condition is that the third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than the third preset temperature value; and controlling the compressor to be closed under the condition that whether a third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than a third preset temperature value or not.
According to an embodiment of the present invention, there is provided an embodiment of a method for thermal management control of an electric vehicle battery, where the following steps are performed in a computer system such as a set of computer executable instructions, and where logical order is shown in the following steps, in some cases, the steps shown or described may be performed in an order different than here.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present invention, and are not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A thermal management control method for an electric vehicle battery is characterized by comprising the following steps:
judging whether the electric vehicle meets a first condition and a second condition, wherein the first condition is that the current temperature of a battery of the electric vehicle is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value;
judging whether the electric vehicle is in a charging state or not under the condition that the electric vehicle meets the first condition and the second condition;
and under the condition that the electric vehicle is in a charging state, controlling a compressor of the electric vehicle to be started, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
2. The method of claim 1, wherein with the electric vehicle in an uncharged state, the method further comprises:
judging whether the available power of the electric vehicle battery is larger than or equal to the total required power, wherein the total required power is the sum of the required power of the compressor and the driving power of the electric vehicle;
and controlling the compressor to be started under the condition that the available power is greater than or equal to the total power demand, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
3. The method of claim 2, wherein in the event that the available power of the electric vehicle battery is less than the total power demand, the method further comprises:
judging whether the current temperature of the electric vehicle battery is greater than or equal to a second preset temperature value or not;
and under the condition that the current temperature is greater than or equal to the second preset temperature value, distributing a first part of the available power to the compressor, and distributing the rest of the available power to a driving mechanism of the electric vehicle, wherein the first part of the available power is the required power of the compressor.
4. The method according to claim 3, wherein in case the current temperature is less than the second preset temperature value, the method further comprises:
distributing a second part of the available power to a driving mechanism of the electric vehicle and distributing the rest of the available power to the compressor, wherein the second part of the available power is the required power of the driving mechanism.
5. The method of claim 4, wherein after distributing a second portion of the available power to a drive mechanism of the electric vehicle and distributing the remaining of the available power to the compressor, the method comprises:
judging whether a second temperature difference between the current temperature of the electric vehicle battery and the second preset temperature is smaller than a third preset temperature value or not;
and controlling the compressor to be closed under the condition that the second temperature difference is smaller than the third preset temperature value.
6. The method of claim 1, wherein after controlling a compressor of the electric vehicle to be turned on while the electric vehicle is in a charging state, the method further comprises:
and judging whether the current temperature of the electric vehicle battery is less than a third preset temperature value or not, and if so, controlling the compressor to be closed.
7. The method of claim 3, wherein after distributing a first portion of the available power to the compressor and distributing the remaining of the available power to a drive mechanism of the electric vehicle if the current temperature is greater than or equal to the second preset temperature value, the method further comprises:
judging whether the electric vehicle meets any one of a third condition and a fourth condition, if so, judging whether a third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than a third preset temperature value, wherein the third condition is that the current available power of the compressor is smaller than the minimum power of the compressor, and the fourth condition is that the third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than the third preset temperature value;
and controlling the compressor to be closed under the condition that whether a third temperature difference between the current temperature of the electric vehicle battery and the second preset temperature value is smaller than a third preset temperature value or not.
8. A thermal management control device of an electric vehicle battery is characterized by comprising:
the first judging unit is used for judging whether the electric vehicle meets a first condition and a second condition, wherein the first condition is that the current temperature of a battery of the electric vehicle is greater than or equal to a first preset temperature, and the second condition is that a first temperature difference between the current temperature and a second preset temperature is greater than or equal to a first preset temperature value;
a second determination unit configured to determine whether the electric vehicle is in a charging state when the electric vehicle meets the first condition and the second condition;
the first control unit is used for controlling the compressor of the electric vehicle to be started under the condition that the electric vehicle is in a charging state, wherein the starting power of the compressor is in direct proportion to the first temperature difference.
9. A computer-readable storage medium, comprising a stored program, wherein when the program runs, the computer-readable storage medium controls a device to execute the method for controlling thermal management of an electric vehicle battery according to any one of claims 1 to 7.
10. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the method for controlling the thermal management of the electric vehicle battery according to any one of claims 1 to 7 when running.
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