CN114987286A - Heat preservation method and device for vehicle power battery, vehicle and storage medium - Google Patents
Heat preservation method and device for vehicle power battery, vehicle and storage medium Download PDFInfo
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- CN114987286A CN114987286A CN202210655855.2A CN202210655855A CN114987286A CN 114987286 A CN114987286 A CN 114987286A CN 202210655855 A CN202210655855 A CN 202210655855A CN 114987286 A CN114987286 A CN 114987286A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000004321 preservation Methods 0.000 title claims abstract description 46
- 238000005485 electric heating Methods 0.000 claims abstract description 126
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
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- 238000004891 communication Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Transportation (AREA)
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- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a heat preservation method and device for a vehicle power battery, a vehicle and a storage medium, wherein the method comprises the following steps: when a charging port of a vehicle is connected with a charging pile through a charging gun, acquiring temperature information of a power battery in real time, and judging whether the current temperature of the power battery is lower than a first preset temperature or not according to the temperature information; if so, acquiring current electric quantity information of the power battery; judging whether the current residual electric quantity of the power battery is greater than or equal to a first preset electric quantity or not according to the current electric quantity information of the power battery; if yes, the power battery is controlled to supply power for the electric heating device, so that the electric heating device heats the power battery. The technical scheme provided by the invention can control the temperature of the power battery, reduce the heat preservation cost of the power battery and improve the heat preservation effect.
Description
Technical Field
The embodiment of the invention relates to the field of vehicles, in particular to a heat preservation method and device for a vehicle power battery, a vehicle and a storage medium.
Background
In recent years, pure electric vehicles are favored by most users. But vehicle power battery is under the low temperature condition, and the available electric quantity of storage can reduce by a wide margin, influences power battery's charge-discharge performance for the difference between the power battery monomer continuously increases, thereby influences user's driving experience to pure electric vehicles greatly, and power battery's low temperature characteristic is not good has greatly influenced pure electric vehicles use and popularization in the cold area in the north.
In the prior art, the heat preservation of the power battery is usually realized mainly by structural design or by adding special heat preservation materials, but the weight and the volume of the power battery system can be increased by the two modes, the arrangement difficulty of the power battery is increased, the design difficulty and the manufacturing cost of the power battery system are greatly increased, and the heat preservation effect of the power battery is poor.
Disclosure of Invention
The embodiment of the invention provides a heat preservation method and device for a vehicle power battery, a vehicle and a storage medium, so as to realize accurate control on the temperature of the power battery and improve the heat preservation effect of a power battery system.
In a first aspect, an embodiment of the present invention provides a method for preserving heat of a vehicle power battery, including:
when a charging port of the vehicle is connected with a charging pile through a charging gun, acquiring temperature information of the power battery in real time;
judging whether the current temperature of the power battery is lower than a first preset temperature or not according to the temperature information;
if so, acquiring current electric quantity information of the power battery;
judging whether the current residual electric quantity of the power battery is larger than or equal to a first preset electric quantity or not according to the current electric quantity information of the power battery;
if so, controlling the power battery to supply power to the electric heating device so that the electric heating device heats the power battery.
Optionally, if the current remaining power is less than the first preset power, the charging pile is controlled to charge the power battery.
Optionally, if the current remaining power is less than the first preset power, the charging pile is controlled to supply power to the electric heating device, so that the electric heating device heats the power battery.
Optionally, when the electric heating device heats the power battery, judging whether the current temperature of the power battery is greater than a second preset temperature according to the temperature information of the power battery;
and if so, stopping supplying power to the electric heating device so as to stop the electric heating device from heating the power battery.
Optionally, obtaining current time information;
judging whether the current time is within a preset heat preservation time range or not according to the current time information;
and if so, executing the step of acquiring the current electric quantity information of the power battery.
Optionally, controlling the power battery to supply power to the electric heating device at a first preset power P1, so that the electric heating device heats the power battery at a second preset power P2; wherein, P1 is more than or equal to 0.4KW and less than or equal to 0.6KW, and P2 is more than or equal to 0.4KW and less than or equal to 0.6 KW.
Optionally, controlling the charging pile to charge the power battery at a third preset power P3; wherein, P3 is more than or equal to 0.4KW and less than or equal to 0.6 KW.
In a second aspect, an embodiment of the present invention provides a thermal insulation device for a vehicle power battery, including:
the temperature information acquisition module is used for acquiring the temperature information of the power battery in real time when a charging port of the vehicle is connected with a charging pile through a charging gun;
the temperature judging module is used for judging whether the current temperature of the power battery is lower than a first preset temperature or not according to the temperature information;
the electric quantity information acquisition module is used for acquiring the current electric quantity information of the power battery;
the electric quantity judging module is used for judging whether the current residual electric quantity of the power battery is larger than or equal to a first preset electric quantity or not according to the current electric quantity information of the power battery;
and the control module is used for controlling the power battery to supply power to the electric heating device so that the electric heating device heats the power battery.
In a third aspect, an embodiment of the present invention further provides a vehicle, including: the device comprises a controller, a power battery, an electric heating device and a water pump;
the water outlet of the water pump is connected with the water inlet of the electric heating device through a cooling pipeline; the water outlet of the electric heating device is connected with the water inlet of the power battery; the water outlet of the power battery is connected with the water inlet of the water pump; the cooling pipeline is arranged to be attached to the power battery;
the controller is used for realizing the heat preservation method of the vehicle power battery provided by any embodiment of the invention.
In a fourth aspect, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method for warming a vehicle power battery provided in any embodiment of the present invention.
The method and the device for controlling the power battery to provide the electric energy for the electric heating device are characterized by acquiring the temperature information of the power battery when a vehicle is charged in real time, comparing the current temperature of the power battery with a first preset temperature, further acquiring the current electric quantity information of the power battery when the current temperature of the power battery is lower than the first preset temperature, determining the current residual electric quantity of the power battery by using the current electric quantity information of the power battery, and controlling the power battery to provide the electric energy for the electric heating device when the current residual electric quantity is higher than or equal to the first preset electric quantity based on the comparison condition of the current residual electric quantity and the first preset electric quantity, so that the electric heating device heats the power battery and keeps the temperature of the power battery. According to the technical scheme provided by the invention, the temperature of the power battery can be controlled, and the heat preservation accuracy of the power battery is improved. In addition, under the condition that the residual capacity of the current power battery meets the requirement of supplying power to the electric heating device, the power battery is adopted to supply power to the electric heating device, so that when a user uses the vehicle, the residual capacity of the power battery of the vehicle can meet the requirement of starting and running, the charging efficiency of the power battery can be improved, the heat preservation cost of the power battery is reduced, and the overall heat preservation effect is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for maintaining temperature of a power battery of a vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for maintaining the temperature of a power battery of a vehicle according to a second embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for maintaining the temperature of a power battery of a vehicle according to a third embodiment of the invention;
FIG. 4 is a schematic flow chart of a method for maintaining the temperature of a vehicle power battery according to a fourth embodiment of the invention;
fig. 5 is a schematic structural diagram of a heat preservation device for a vehicle power battery according to a fifth embodiment of the invention;
fig. 6 is a schematic structural diagram of a thermal insulation system of a vehicle power battery according to a sixth embodiment of the invention.
Detailed Description
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 is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described 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.
Example one
Fig. 1 is a schematic flow chart of a method for maintaining temperature of a power battery of a vehicle according to an embodiment of the present invention, which may be performed by a device for maintaining temperature of a power battery, where the device may be composed of hardware and/or software. The heat preservation method of the power battery provided by the embodiment of the invention comprises the following steps:
s110, when the charging port of the vehicle is connected with the charging pile through the charging gun, the temperature information of the power battery is acquired in real time.
The types of vehicles are classified into pure oil type vehicles, gasoline-electric hybrid vehicles and pure electric vehicles. The pure electric vehicle is powered by a power battery to promote the vehicle to start. The power battery is a secondary battery and can realize the charge and discharge functions. When the power battery needs to be charged, the charging gun connected with the charging pile is inserted into a charging port of the vehicle, so that the power battery in the vehicle can be charged. In the process of charging the vehicle, the temperature information of the power battery can be acquired in real time. The temperature information of the power battery comprises specific temperature values of the power battery under different environments. For example, in an outdoor environment at 0 ℃, a vehicle is charged by using a charging pile, and the temperature information of a power battery may be-3 ℃; in an outdoor environment of 15 ℃, the vehicle is charged by using the charging pile, and the temperature information of the power battery may be 10 ℃. Here, the specific temperature value of the power battery is not limited, and may be adaptively adjusted according to the actual situation.
S120, judging whether the current temperature of the power battery is lower than a first preset temperature or not according to the temperature information; if yes, go to S130.
The temperature information of the power battery can be acquired in real time based on a temperature sensor in the vehicle. . The types and types of the power batteries are different, so that the severe cold resistance and the temperature resistance of the power batteries are different. Different power batteries correspond to different first preset temperatures. The first preset temperature may be preset and stored in the corresponding power battery management system. For example, the first preset temperature may be-5 ℃ or-6 ℃, and the specific value of the first preset temperature is not limited herein and may be adjusted according to environmental factors or different vehicles. The current temperature of the power battery may be greater than the first preset temperature, equal to the first preset temperature, or less than the first preset temperature. When the current temperature of the power battery is lower than the first preset temperature, the power battery needs to be heated by the electric heating device so as to realize heat preservation of the power battery.
And S130, acquiring current electric quantity information of the power battery.
The electric quantity information of the power battery can be at least one of the current output power, the current output voltage, the current output current and the current remaining electric quantity of the power battery, and can represent the current discharging capacity of the power battery. Here, it is not particularly limited. The current remaining capacity refers to the available capacity of the power battery, and is also the SOC value of the power battery. And determining whether the power battery has enough discharge capacity by acquiring the SOC value of the power battery.
S140, judging whether the current residual electric quantity of the power battery is larger than or equal to a first preset electric quantity or not according to the current electric quantity information of the power battery; if yes, go to S150.
Specifically, after the current electric quantity information of the power battery is acquired, the current residual electric quantity of the power battery is compared with a first preset electric quantity, and whether the power battery has sufficient electric quantity to supply power for other devices is determined. The first preset electric quantity may preset a specific set value, and for example, the first preset electric quantity may be 99%, which is not specifically limited herein. The current remaining capacity may be greater than, less than, or equal to the first preset capacity. The relation between the current residual capacity and the first preset capacity is determined by comparing the current residual capacity with the first preset capacity.
And S150, controlling the power battery to supply power to the electric heating device so that the electric heating device heats the power battery.
Specifically, after the current residual capacity of the power battery is compared with the first preset capacity, when it is determined that the power battery has sufficient capacity to supply power to other equipment, the power battery is used for supplying power to the electric heating device, and at the moment, the vehicle controller can control the power battery to supply power to the electric heating device, so that the electric heating device heats the power battery, and the temperature of the power battery is further increased. When the power battery is used for supplying power to the electric heating device, the power of the power battery can be set to a specific power value so as to supply power to the electric heating device through the specific power value. The power of the power battery can be divided into three types, namely high power, medium power and low power, and different powers can be selected according to different requirements to supply power to the electric heating device, which is not particularly limited herein. The electric heating device needs the outside to provide the electric energy and just can realize the heating function, can be power battery itself to the power for electric heating device power supply, can also be external power supply, if fill electric pile. The power battery or the charging pile can supply power to the electric heating device, and the specific power supply mode is not limited.
According to the embodiment of the invention, the temperature information of the power battery is acquired in real time when the vehicle is charged, the current temperature of the power battery is compared with the first preset temperature, and the current electric quantity information of the power battery is further acquired when the current temperature of the power battery is less than the first preset temperature. The current residual electric quantity of the power battery is determined by utilizing the current electric quantity information of the power battery, and the power battery is controlled to provide electric energy for the electric heating device when the current residual electric quantity is larger than or equal to the first preset electric quantity based on the comparison condition of the current residual electric quantity and the first preset electric quantity, so that the electric heating device is used for heating the power battery to preserve heat of the power battery. According to the technical scheme provided by the invention, the temperature of the power battery can be controlled, and the heat preservation precision of the power battery is improved. In addition, under the condition that the residual capacity of the current power battery meets the requirement of supplying power to the electric heating device, the power battery is adopted to supply power to the electric heating device, so that when a user uses the vehicle, the residual capacity of the power battery of the vehicle can meet the requirement of starting and running, the charging efficiency of the power battery can be improved, the heat preservation cost of the power battery is reduced, and the overall heat preservation effect is improved.
On the basis of the above embodiment, optionally, controlling the power battery to supply power to the electric heating device so that the electric heating device heats the power battery includes: controlling the power battery to supply power to the electric heating device at a first preset power P1 so that the electric heating device heats the power battery at a second preset power P2; wherein, P1 is more than or equal to 0.4KW and less than or equal to 0.6KW, and P2 is more than or equal to 0.4KW and less than or equal to 0.6 KW.
Wherein, the power battery has the capability of supplying power to the electric heating device, and the main controller of the vehicle can control the power battery to supply power to the electric heating device with the first preset power P1. The first preset power P1 can be preset, and the first preset power is set to be low power, then the power battery will supply power to the electric heating device in a low power mode. Under the condition of normal operation, the electric heating device can heat the power battery with specific power. Meanwhile, the power battery can generate heating power to maintain the temperature of the power battery. For example, the electric heating device may heat the power battery by using the second preset power P2. The value ranges of the first preset power P1 and the second preset power P2 may be the same, but the specific set powers may be different, when the first preset power P1 is 0.6KW, the second preset power P2 is 0.5 KW; or the first preset power P1 is 0.5KW, and the second preset power P2 is 0.5 KW. Specific values of the first preset power and the second preset power are not limited, and can be selected according to actual conditions.
Example two
Fig. 2 is a schematic flow chart of a heat preservation method for a vehicle power battery according to a second embodiment of the present invention, and specifically provides a scheme for controlling a charging pile to charge the power battery on the basis of the second embodiment. The technical scheme of the embodiment comprises the following steps:
s210, when the charging port of the vehicle is connected with the charging pile through the charging gun, the temperature information of the power battery is acquired in real time.
And S220, judging whether the current temperature of the power battery is lower than a first preset temperature or not according to the temperature information, and if so, executing S230.
And S230, acquiring current electric quantity information of the power battery.
S240, judging whether the current residual electric quantity of the power battery is larger than or equal to a first preset electric quantity or not according to the current electric quantity information of the power battery, and if so, executing S250; if not, executing S260 and/or S270.
And S250, controlling the power battery to supply power to the electric heating device so that the electric heating device heats the power battery.
And S260, controlling the charging pile to charge the power battery.
Specifically, after the current residual capacity of the power battery is compared with the first preset electric quantity, when the current residual capacity of the power battery is determined to be smaller than the first preset electric quantity, the electric quantity in the power battery can be determined to be less, the use requirement of a user cannot be met, at the moment, the power battery can be charged by the charging pile, the power battery can be guaranteed to have enough electric quantity, and the use of the user cannot be influenced due to the insufficient electric quantity of the power battery. In the charging process of the power battery, the power battery can generate heating power to maintain the temperature of the power battery.
The charging pile can charge the power battery with specific preset power, illustratively, the charging pile is controlled to charge the power battery with third preset power P3, and the third preset power P3 may be a preset limited value, such as 0.4KW ≤ P3 ≤ 0.6KW, where the specific value of the third preset power P3 is not limited.
And S270, if the current residual electric quantity is smaller than a first preset electric quantity, controlling the charging pile to supply power to the electric heating device so that the electric heating device heats the power battery.
Specifically, when the current temperature of the power battery is lower than a first preset temperature, the power battery needs to be kept warm. The temperature of the power battery can be raised by heating the power battery by the electric heating device. In the power supply mode of the electric heating device, a power battery can be selected for supplying power to the electric heating device, and a charging pile can also be selected for supplying power to the electric heating device. When the residual electric quantity of the power battery is smaller than the first preset electric quantity, the electric quantity of the power battery is less, at the moment, the electric pile can be charged through the charging pile to supply power to the electric heating device, so that the electric heating device works normally, the electric heating device heats the power battery, and the heat preservation of the power battery is realized.
According to the embodiment of the invention, after the current residual electric quantity of the power battery is compared with the first preset electric quantity, when the current residual electric quantity of the power battery is smaller than the first preset electric quantity, the power battery is charged by using the charging pile at the third preset power, and meanwhile, the charging pile is also used for supplying power to the electric heating device, so that the electric heating device heats the power battery, and further the heat preservation of the power battery is realized. The heat preservation effect of the power battery system is improved, the heat preservation cost of the power battery is reduced, the heat preservation effect is improved, and the service performance and the service life of the power battery at low temperature are improved.
EXAMPLE III
Fig. 3 is a schematic flow chart of a method for maintaining the temperature of a power battery of a vehicle according to a third embodiment of the present invention, and on the basis of the third embodiment, a scheme for stopping charging of the power battery is specifically provided. The technical scheme of the embodiment comprises the following steps:
and S310, acquiring the temperature information of the power battery in real time when the charging port of the vehicle is connected with the charging pile through the charging gun.
And S320, judging whether the current temperature of the power battery is lower than a first preset temperature or not according to the temperature information, and if so, executing S330.
And S330, acquiring current electric quantity information of the power battery.
S340, judging whether the current residual electric quantity of the power battery is larger than or equal to a first preset electric quantity or not according to the current electric quantity information of the power battery, and if so, executing S350.
And S350, controlling the power battery to supply power to the electric heating device so that the electric heating device heats the power battery.
And S360, when the electric heating device heats the power battery, judging whether the current temperature of the power battery is higher than a second preset temperature or not according to the temperature information of the power battery, and if so, executing S370.
And S370, stopping supplying power to the electric heating device so that the electric heating device stops heating the power battery.
When the current temperature of the power battery is raised to a certain temperature, the power battery does not need to be heated by the electric heating device. And judging whether the current power battery needs to be heated by the electric heating device or not by setting a second preset temperature. The second predetermined temperature may be predetermined, and, for example, the second predetermined temperature may be-4 ℃. The specific value of the second preset temperature is not limited herein. The first preset temperature of the power battery is lower than the second preset temperature, the first preset temperature is the temperature for judging whether the power battery needs to be heated by the electric heating device, and the second preset temperature is the temperature for judging whether the power battery can stop the electric heating device to heat the power battery. The first preset temperature can also be understood as the lower temperature limit for heating the power battery, and the second preset temperature can be understood as the upper temperature limit for heating the power battery. The power battery needs to be heated by the electric heating device when the temperature is lower than the first preset temperature, and the power battery does not need to be heated by the electric heating device when the temperature is higher than the second preset temperature. Further, when the current temperature of the power battery is higher than the second preset temperature, the power battery does not need the electric heating device to keep the temperature of the power battery, the power supply of the electric heating device is stopped, and the electric heating device does not heat the power battery. The power supply mode for the electric heating device can be provided by the power battery, and can also be provided by the charging pile, and the charging pile can be closed in a targeted manner or the power battery is closed to be the power supply end of the electric heating device.
According to the embodiment of the invention, when the electric heating device heats the power battery, the current temperature of the power battery is compared with the second preset temperature, and when the current temperature of the power battery is higher than the second preset temperature, the power supply to the electric heating device is stopped, so that the electric heating device does not heat the power battery any more, the situation that the electric heating device continuously heats the power battery to influence the service life of the power battery is avoided, in addition, the overall energy consumption of the power battery heat preservation device can be saved, and the heat preservation cost is reduced.
Example four
Fig. 4 is a schematic flow chart of a method for preserving heat of a vehicle power battery according to a fourth embodiment of the present invention, and on the basis of the fourth embodiment, a technical solution for judging the current time is specifically provided. The technical scheme of the embodiment comprises the following steps:
s410, when the charging port of the vehicle is connected with the charging pile through the charging gun, the temperature information of the power battery is acquired in real time.
And S420, judging whether the current temperature of the power battery is lower than a first preset temperature or not according to the temperature information, and if so, executing S430.
And S430, acquiring current time information.
And S440, judging whether the current time is within a preset heat preservation time range or not according to the current time information, and if so, executing S450.
Wherein, there is charging device around the vehicle, when having promptly to fill electric pile, can charge pure electric vehicles according to user's the car demand. The user can choose to charge in the morning, in the afternoon, or in the evening. According to the charging time period of the user, the user can preset the heat preservation time period of the power battery. When the current temperature of the power battery is lower than a first preset temperature and the current time information of the vehicle, which is acquired by the vehicle main controller, is within a preset heat preservation time range of a user, the electric quantity information of the power battery can be acquired, whether the power battery needs to be used for supplying power for the electric heating device is further judged, and the power battery can be heated when the electric heating device acquires electric energy. For example, the preset holding time range of the power battery may be from three points in the morning to seven points in the morning, which is not limited herein.
And S450, acquiring current electric quantity information of the power battery.
S460, determining whether the current remaining power of the power battery is greater than or equal to a first preset power according to the current power information of the power battery, if so, executing S470.
And S470, controlling the power battery to supply power to the electric heating device so that the electric heating device heats the power battery.
The embodiment of the invention acquires the current time information, judges that the current time information is compared with the heat preservation time range preset by a user, and further acquires the current electric quantity of the power battery when the current time information accords with the preset heat preservation time range. According to the technical scheme, the heat insulation effect of the power battery system can be improved without adding extra hardware in the power battery system, the heat insulation cost of the power battery is reduced, the heat insulation effect is improved, and the service performance and the service life of the power battery at low temperature are improved.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a heat preservation device for a vehicle power battery according to a fifth embodiment of the invention. The means may be comprised of hardware and/or software. As shown in fig. 5, the apparatus includes: a temperature information acquiring module 510, a temperature judging module 520, an electric quantity information acquiring module 530, an electric quantity judging module 540, a control module 550, a time judging module 560, and a power control module 570.
The temperature information acquisition module 510 is configured to acquire temperature information of the power battery in real time when a charging port of the vehicle is connected to the charging pile through the charging gun.
And a temperature determining module 520, configured to determine whether the current temperature of the power battery is less than a first preset temperature according to the temperature information.
And an electric quantity information obtaining module 530, configured to obtain current electric quantity information of the power battery.
The power determining module 540 is configured to determine whether the current remaining power of the power battery is greater than or equal to a first preset power according to the current power information of the power battery.
And a control module 550 for controlling the power battery to supply power to the electric heating device, so that the electric heating device heats the power battery.
The time judging module 560 is configured to obtain current time information, and judge whether the current time is within a preset heat preservation time range according to the current time information; and if so, executing the step of acquiring the current electric quantity information of the power battery.
A power control module 570 for controlling the power battery to supply power to the electric heating device at a first preset power P1, so that the electric heating device heats the power battery at a second preset power P2; the power battery charging method comprises the following steps of charging a charging pile, wherein P1 is more than or equal to 0.4KW and less than or equal to 0.6KW, P2 is more than or equal to 0.4KW and less than or equal to 0.6KW, and the charging pile is also used for controlling the charging pile to charge the power battery by using third preset power P3; wherein, P3 is more than or equal to 0.4KW and less than or equal to 0.6 KW.
Further, the control module 550 is further configured to control the charging pile to charge the power battery when the current remaining power is less than the first preset power. The control module 550 is further configured to control the charging pile to supply power to the electric heating device if the current remaining power is less than the first preset power, so that the electric heating device heats the power battery.
The temperature determining module 520 is further configured to determine whether the current temperature of the power battery is greater than a second preset temperature according to the temperature information of the power battery when the electric heating device heats the power battery, and if so, stop supplying power to the electric heating device, so that the electric heating device stops heating the power battery.
According to the heat preservation device for the vehicle power battery, the temperature information of the power battery is acquired in real time, and the current temperature of the power battery is compared with the first preset temperature based on the temperature information. And when the current temperature is higher than a first preset temperature, acquiring current electric quantity information of the power battery. And when the current residual electric quantity of the power battery is greater than or equal to a first preset electric quantity, controlling the power battery to heat the electric heating device, so that the electric heating device heats the power battery. The heat preservation device of the power battery can execute the heat preservation method of the power battery provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
EXAMPLE six
The embodiment of the invention also provides a vehicle, which comprises a controller, wherein the controller is used for executing the heat preservation method of the vehicle power battery provided by any embodiment, and the vehicle comprises a controller, a power battery 610, an electric heating device 620 and a water pump 630; the water outlet of the water pump is connected with the water inlet of the electric heating device 620 through a cooling pipeline 650; the water outlet of the electric heating device 620 is connected with the water inlet of the power battery 610; the water outlet of the power battery 610 is connected with the water inlet of the water pump 630; the cooling pipeline 650 is arranged to be attached to the power battery. Fig. 6 is a schematic structural diagram of a heat preservation system for a vehicle power battery according to a sixth embodiment of the present invention.
Specifically, with continued reference to fig. 6, when the current temperature of the power battery 610 in the vehicle is less than the first preset temperature, the current charge information of the power battery 610 is further obtained, and when the remaining charge of the power battery 610 is greater than or equal to the first preset charge, the power battery 610 is used to heat the electric heating device 620, and the main controller of the vehicle can control the electric heating device 620 to output heat energy and can control the water pump 630 to start operating. During the process of heating the power battery 610 by the electric heating device 620, the water pump 630 drives the electric cooling device 640 to work, and the power battery 640 is prevented from being damaged due to the too fast temperature rise. The cooling liquid in the cooling line 650 starts to flow, keeping the temperature of the power cells 610 while the electric heating device 620 heats the power cells 630. When the current temperature of the power battery 610 in the vehicle is higher than the second preset temperature, the main controller of the vehicle controls the power battery 610 not to supply power to the electric heating device 620 any more, the electric heating device 620 stops outputting heat energy, the water pump 630 also stops working, and then the heat preservation of the power battery 610 is finished.
Further, when the current temperature of the power battery 610 in the vehicle is less than a first preset temperature, the current electric quantity information of the power battery 610 is further acquired, and when the remaining electric quantity of the power battery 610 is less than the first preset electric quantity, the charging pile 660 and the vehicle-mounted charger 670 are used to cooperate to supply power to the electric heating device 620. The charging pile 650 also charges the power battery 610. The charging pile 650 is connected to the vehicle-mounted charger 660 through a high voltage wire harness, and converts the alternating current provided by the charging pile 650 into direct current to supply power to the power battery 610 and the electric heating device 620. The main controller of the vehicle can control the electric heating device 620 to output heat energy and can control the water pump 630 to start operating. During the process of heating the power battery 610 by the electric heating device 620, the water pump 630 drives the electric cooling device 640 to work, and the power battery 640 is prevented from being damaged due to the too fast temperature rise. The cooling liquid in the cooling line 650 starts to flow, keeping the temperature of the power cell 610 while the electric heating device 620 heats the power cell 630. When the current temperature of the power battery 610 in the vehicle is higher than the second preset temperature, the main controller of the vehicle controls the power battery 610 not to supply power to the electric heating device 620 any more, the electric heating device 620 stops outputting heat energy, the water pump 630 also stops working, and then the heat preservation of the power battery 610 is finished. The vehicle is suitable for the heat preservation method of the vehicle power battery provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
EXAMPLE seven
An embodiment of the present invention provides a computer-readable storage medium on which a computer program for implementing the method of the present invention is stored, which may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on 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 (EPROM or 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.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), Wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for preserving heat of a vehicle power battery is characterized by comprising the following steps:
when a charging port of the vehicle is connected with a charging pile through a charging gun, acquiring temperature information of the power battery in real time;
judging whether the current temperature of the power battery is lower than a first preset temperature or not according to the temperature information;
if so, acquiring current electric quantity information of the power battery;
judging whether the current residual electric quantity of the power battery is larger than or equal to a first preset electric quantity or not according to the current electric quantity information of the power battery;
if so, controlling the power battery to supply power to the electric heating device so that the electric heating device heats the power battery.
2. The method for keeping warm of a vehicle power battery according to claim 1, characterized by further comprising:
and if the current residual electric quantity is smaller than the first preset electric quantity, controlling the charging pile to charge the power battery.
3. The method for keeping warm of a vehicle power battery according to claim 1, characterized by further comprising:
and if the current residual electric quantity is less than the first preset electric quantity, controlling the charging pile to supply power to the electric heating device so that the electric heating device heats the power battery.
4. The method for keeping warm of a vehicle power battery according to claim 1, characterized by further comprising:
when the electric heating device heats the power battery, judging whether the current temperature of the power battery is higher than a second preset temperature or not according to the temperature information of the power battery;
and if so, stopping supplying power to the electric heating device so as to stop the electric heating device from heating the power battery.
5. The method for preserving heat of a vehicle power battery according to claim 1, further comprising, before obtaining information on the current charge level of the power battery:
acquiring current time information;
judging whether the current time is within a preset heat preservation time range or not according to the current time information;
and if so, executing the step of acquiring the current electric quantity information of the power battery.
6. The method for keeping the temperature of the power battery of the vehicle according to claim 1, wherein controlling the power battery to supply power to an electric heating device so as to enable the electric heating device to heat the power battery comprises:
controlling the power battery to supply power to the electric heating device at a first preset power P1 so that the electric heating device heats the power battery at a second preset power P2; wherein, P1 is more than or equal to 0.4KW and less than or equal to 0.6KW, and P2 is more than or equal to 0.4KW and less than or equal to 0.6 KW.
7. The method for maintaining the temperature of the power battery of the vehicle according to claim 2, wherein the controlling of the charging pile to charge the power battery comprises:
controlling the charging pile to charge the power battery by third preset power P3; wherein, P3 is more than or equal to 0.4KW and less than or equal to 0.6 KW.
8. A thermal insulation device for a vehicle power battery, comprising:
the temperature information acquisition module is used for acquiring the temperature information of the power battery in real time when a charging port of the vehicle is connected with a charging pile through a charging gun;
the temperature judging module is used for judging whether the current temperature of the power battery is lower than a first preset temperature or not according to the temperature information;
the electric quantity information acquisition module is used for acquiring the current electric quantity information of the power battery;
the electric quantity judging module is used for judging whether the current residual electric quantity of the power battery is larger than or equal to a first preset electric quantity or not according to the current electric quantity information of the power battery;
and the control module is used for controlling the power battery to supply power to the electric heating device so that the electric heating device heats the power battery.
9. A vehicle, characterized by comprising: the device comprises a controller, a power battery, an electric heating device and a water pump;
the water outlet of the water pump is connected with the water inlet of the electric heating device through a cooling pipeline; the water outlet of the electric heating device is connected with the water inlet of the power battery; the water outlet of the power battery is connected with the water inlet of the water pump; the cooling pipeline is arranged to be attached to the power battery;
the controller is configured to execute the method for warming the vehicle power battery according to any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the method for warming a vehicle power battery according to any one of claims 1 to 7.
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Application publication date: 20220902 |