CN114407730B - Low-temperature heat management system and method for extended-range new energy automobile - Google Patents
Low-temperature heat management system and method for extended-range new energy automobile Download PDFInfo
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- CN114407730B CN114407730B CN202111526041.0A CN202111526041A CN114407730B CN 114407730 B CN114407730 B CN 114407730B CN 202111526041 A CN202111526041 A CN 202111526041A CN 114407730 B CN114407730 B CN 114407730B
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- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 239000004606 Fillers/Extenders Substances 0.000 claims abstract description 16
- 230000007613 environmental effect Effects 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims description 14
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 239000000178 monomer Substances 0.000 claims description 9
- 230000006855 networking Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 238000013139 quantization Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000012163 sequencing technique Methods 0.000 claims description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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
-
- 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]
- B60L58/13—Maintaining the SoC within a determined range
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
-
- 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
Abstract
The invention provides a low-temperature heat management method of a range-extended new energy automobile, which belongs to the technical field of electric automobiles and comprises the following steps: detecting the temperature of a single body of the battery pack in real time to obtain real-time temperature detection data; the temperature detection data are stored in a segmented mode to form multi-segment temperature detection data; respectively checking the stored temperature detection side data of each section by combining with the running record of the automobile to obtain the lowest temperature of the battery; acquiring a weather state in real time, and acquiring the lowest environmental temperature by combining the current running environment of the automobile; according to the lowest temperature of the battery and the lowest environmental temperature, power generation is performed through the range extender, heating control is performed through the battery PTC, the electric quantity of the battery pack and the temperature of the battery pack are balanced, and power and heating requirements of the battery can be balanced.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a low-temperature heat management system and a low-temperature heat management method for a range-extended new energy automobile.
Background
With the increase of new energy automobiles in the market, the requirements on the battery performance in various environments are increasing, particularly in the use scene in a low-temperature environment, the battery self-characteristics are poor in low-temperature discharge performance, and the battery cannot discharge outwards even in the environment of minus 30 ℃, so that the thermal management control is very important.
The heat management of the range-extending system and the heat management of the pure electric system contained in the new energy automobile in the market at present have different heat management treatment modes, but the performance in a low-temperature environment is realized, and the pure electric automobile only can discharge by means of a battery to heat a battery pack, so that on one hand, the power output is required to be met, and on the other hand, part of energy consumed by heat management parts such as a battery PTC is required to be met, and therefore, the power performance is lost, and the greater mileage anxiety is brought.
Therefore, a new energy automobile battery management method is needed to balance the power and heating requirements of the battery.
Disclosure of Invention
The invention provides a low-temperature heat management method of a range-extended new energy automobile, which comprises the steps of generating electricity through a range extender according to the lowest temperature of a battery and the lowest environmental temperature, performing heating control through a battery PTC, balancing the electric quantity of a battery pack and the temperature of the battery pack, and ensuring that the battery pack can realize good performance in a low-temperature environment.
The technical scheme provided by the invention is as follows:
a low-temperature heat management method of a range-extending new energy automobile comprises the following steps:
detecting the temperature of a single body of the battery pack in real time to obtain real-time temperature detection data;
the temperature detection data are stored in a segmented mode to form multi-segment temperature detection data;
respectively checking the stored temperature detection side data of each section by combining with the running record of the automobile to obtain the lowest temperature of the battery;
acquiring a weather state in real time, and acquiring the lowest environmental temperature by combining the current running environment of the automobile;
and generating electricity through a range extender according to the lowest temperature of the battery and the lowest ambient temperature, and performing heating control through the PTC of the battery to balance the electric quantity of the battery pack and the temperature of the battery pack.
Preferably, in combination with the vehicle running record, the temperature detection side data stored in each section are checked to obtain the lowest temperature of the battery, including:
acquiring an automobile running record;
setting a running threshold value and comparing the running threshold value with a running record value;
if the running record value is larger than the running threshold value, judging that the automobile has long-distance running activity;
if the automobile has long-distance running activity, sequencing the stored temperature detection side data of each section, and removing the abnormal jump data and the temperature abnormal data during power-on to obtain checked temperature data;
and calculating the lowest temperature of the battery according to the verified temperature data.
Preferably, the acquiring weather status in real time and acquiring the lowest environmental temperature in combination with the current running environment of the automobile includes:
acquiring weather states in real time through vehicle networking so as to determine the use environment of the vehicle;
a quantization table of the usage environment of the vehicle is established,
and determining the lowest environment temperature by combining the quantization table of the use environment.
Preferably, according to the lowest temperature of the battery and the lowest ambient temperature, generating electricity by a range extender, and performing heating control by a battery PTC, balancing the electric quantity of the battery pack and the temperature of the battery pack, comprising:
when the lowest temperature of the battery pack monomer is lower than the temperature threshold value and the environment temperature is lower than the environment threshold value, generating electricity through the range extender to enable the electric quantity of the power battery to be higher than a first electric quantity value, and simultaneously performing heating control through the battery PTC to enable the temperature of the power battery pack to be higher than the first temperature value;
when the lowest temperature of the battery pack monomer is lower than the temperature threshold and the environment temperature is higher than the environment threshold, the whole vehicle controller generates electricity through the range extender, so that the electric quantity of the power battery is between a second electric quantity value and a third electric quantity value, heating control is carried out through the battery PTC, and the temperature of the power battery is between the second temperature value and the third temperature value;
when the temperature of the power battery pack is higher than the temperature threshold and the ambient temperature is lower than the temperature threshold, the whole vehicle controller generates power through the range increase, so that the electric quantity of the power battery is between a fourth electric quantity value and a fifth electric quantity value, and the power battery is maintained between the fourth temperature value and the fifth temperature value through heating control by the battery PTC;
when the temperature of the power battery pack is higher than the temperature threshold and the ambient temperature is higher than the temperature threshold, the whole vehicle controller generates power through the range increase, so that the electric quantity of the power battery is between a sixth electric quantity value and a seventh electric quantity value, and the battery PTC is used for heating control, so that the temperature of the power battery is maintained between the sixth temperature value and the seventh temperature value.
Preferably, in combination with the vehicle running record, the temperature detection side data stored in each section are respectively checked to obtain the lowest temperature of the battery, which specifically comprises the following steps:
and (3) checking the lowest temperature of the battery pack monomer for 4 times, eliminating the current power-on or 1-time temperature abnormality of the vehicle, simultaneously recording whether a user has long-distance driving activity, storing the battery temperature for 4 times, and checking and determining the lowest temperature of the battery.
Preferably, the temperature threshold is: -6 degrees celsius, the environmental threshold is: -18 degrees celsius.
Preferably, the first electric quantity value is: 0.9; the second electric quantity value is: 0.7; the third point power value is 0.65; the fourth electrical quantity value is: 0.6; the fifth electric quantity value is 0.4; the sixth electric quantity value is 0.3; the seventh electrical value is 0.2.
Preferably, the first temperature value is: -2 degrees celsius; the second temperature value is: 1 degree celsius; the third point temperature value is: 3 degrees celsius; the fourth temperature value is: 5 ℃; the fifth temperature value is: 8 degrees celsius; the sixth temperature value is: 12 degrees celsius; the seventh temperature value is: 18 degrees celsius.
The technical scheme provided by the invention is as follows: a low temperature heat management system of a range-extending new energy automobile comprises:
the battery manager is used for detecting the single temperature of the battery pack in real time to obtain real-time temperature detection data;
the environment temperature sensor is used for monitoring the environment temperature of the vehicle;
a networking device for obtaining weather conditions in real time on a network;
and the whole vehicle controller integrates a thermal management controller and an city increasing system controller, is connected with the battery manager, the ambient temperature sensor and the networking device, and realizes the temperature control of the battery pack.
Preferably, the whole vehicle controller is a thermal management master controller.
The beneficial effects of the invention are as follows:
the invention utilizes the main control advantage of the whole vehicle controller to store and check the temperature of the battery pack for multiple times so as to identify whether the battery pack is in a low-temperature environment or not, and simultaneously stores and checks the temperature sensor of the whole vehicle environment and the weather temperature of the mobile internet.
According to the invention, the range extender is started to work under low power during low-temperature cold start, meanwhile, the electric energy provided by the range extender enables the heater to be in a working state at the same time, so that the battery heating speed is higher, meanwhile, the battery discharging is not needed, the problem that the service life of the battery is influenced during low-temperature start is avoided, meanwhile, the problem that the endurance mileage of the pure electric vehicle is short in a low-temperature environment is solved, and the service performance of the battery is effectively improved.
Drawings
FIG. 1 is a flow chart of a low-temperature heat management method for an extended range new energy automobile.
Fig. 2 is a schematic diagram of a low-temperature heat management system of an extended-range new energy automobile according to the present invention.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, in the description of the present invention, terms such as "medium," "upper," "lower," "transverse," "inner," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
As shown in fig. 1, the present invention provides a low-temperature heat management method for a new energy automobile with extended range based on the technical problem set forth in the background art, which comprises the following steps:
step S110, detecting the monomer temperature of the battery pack in real time to obtain real-time temperature detection data;
step S120, carrying out segmented storage on temperature detection data to a plurality of segments of temperature detection data; in a preferred embodiment, the temperature monitoring data is stored in four segments to obtain four segments of temperature monitoring data, which are recorded as storage data 1, storage data 2, storage data 3 and storage data 4, respectively.
Step S130, combining with the automobile running record, and respectively checking the stored temperature detection side data of each section to obtain the lowest temperature of the battery;
step S140, acquiring a weather state in real time, and acquiring the lowest environmental temperature by combining the current running environment of the automobile;
and step S150, generating electricity through the range extender according to the lowest temperature of the battery and the lowest ambient temperature, and performing heating control through the PTC of the battery to balance the electric quantity of the battery pack and the temperature of the battery pack.
In the embodiment, under the condition that considerable power can still be output in a low-temperature environment, the converted kinetic energy is used for PTC heating of the battery, so that the battery pack can achieve good performance in the low-temperature environment.
In a preferred embodiment, in combination with the vehicle running record, the temperature detection side data stored in each section are checked to obtain the lowest temperature of the battery, and the method comprises the following steps:
acquiring an automobile running record;
setting a running threshold value and comparing the running threshold value with a running record value, wherein the running threshold value is preferably set to be 20-40 km; if the running record value is larger than the running threshold value, judging that the automobile has long-distance running activity;
if the automobile has long-distance running activity, sequencing the stored temperature detection side data of each section, and removing the abnormal jump data and the temperature abnormal data during power-on to obtain checked temperature data;
preferably, the determination of the abnormal jump data is obtained by correcting each data separately, i.e. each temperature detection data T in the traverse section i I=1, 2,3 … i … M; calculating segment internal division temperature detection data T j The mean value of all the data outside itself,if the temperature detection data value +.>And when the data is determined to be abnormal jump data, eliminating the abnormal jump data.
Calculating to obtain the lowest temperature of the battery according to the verified temperature data:
in a preferred embodiment, acquiring weather conditions in real time and in combination with the current driving environment of the vehicle, acquiring the minimum ambient temperature comprises:
acquiring weather states in real time through vehicle networking so as to determine the use environment of the vehicle;
establishing a quantization table of the use environment of the vehicle;
as shown in table 1, one specific embodiment of the vehicle use environment quantization table is given:
table 1 quantification table of use environment of vehicle
| Weather conditions | Quantized value |
| Air temperature | Temperature value |
| Humidity of the water | Humidity value |
| Wind power | 0.4-1 |
| Cloud | 0.01-0.3 |
| Mist spray | 1-1.2 |
| Rain cover | 0.8-1.1 |
| Ice | 1.2-3 |
| Snow made of snow | 1.5-4 |
| Thunder mine | 1.1-1.5 |
| Cream | 1.1-1.5 |
| Hail | 2-6 |
In conjunction with using a quantization table of environments, a minimum ambient temperature is determined.
According to the minimum battery temperature and the minimum environment temperature, generating electricity through a range extender, performing heating control through a battery PTC, balancing the electric quantity of the battery pack and the temperature of the battery pack, and comprising:
when the lowest temperature of the battery pack monomer is lower than the temperature threshold value and the environment temperature is lower than the environment threshold value, generating electricity through the range extender to enable the electric quantity of the power battery to be higher than a first electric quantity value, and simultaneously performing heating control through the battery PTC to enable the temperature of the power battery pack to be higher than the first temperature value;
when the lowest temperature of the battery pack monomer is lower than the temperature threshold and the environment temperature is higher than the environment threshold, the whole vehicle controller generates electricity through the range extender, so that the electric quantity of the power battery is between a second electric quantity value and a third electric quantity value, heating control is carried out through the battery PTC, and the temperature of the power battery is between the second temperature value and the third temperature value;
when the temperature of the power battery pack is higher than the temperature threshold and the ambient temperature is lower than the temperature threshold, the whole vehicle controller generates power through the range increase, so that the electric quantity of the power battery is between a fourth electric quantity value and a fifth electric quantity value, and the power battery is maintained between the fourth temperature value and the fifth temperature value through heating control by the battery PTC;
when the temperature of the power battery pack is higher than the temperature threshold and the ambient temperature is higher than the temperature threshold, the whole vehicle controller generates power through the range increase, so that the electric quantity of the power battery is between a sixth electric quantity value and a seventh electric quantity value, and the battery PTC is used for heating control, so that the temperature of the power battery is maintained between the sixth temperature value and the seventh temperature value.
In a preferred embodiment, specific values of the temperature threshold and the environmental threshold are given, so as to facilitate the implementation of the adjustment by a person skilled in the art according to the actual situation: the temperature threshold is: -6 degrees celsius, the environmental threshold is: -18 degrees celsius.
In a preferred embodiment, the first electrical quantity value is: 0.9; the second electric quantity value is: 0.7; the third point power value is 0.65; the fourth electrical quantity value is: 0.6; the fifth electric quantity value is 0.4; the sixth electric quantity value is 0.3; the seventh electrical value is 0.2.
In a preferred embodiment, the first temperature value is: -2 degrees celsius; the second temperature value is: 1 degree celsius; the third point temperature value is: 3 degrees celsius; the fourth temperature value is: 5 ℃; the fifth temperature value is: 8 degrees celsius; the sixth temperature value is: 12 degrees celsius; the seventh temperature value is: 18 degrees celsius.
As shown in fig. 2, the present invention further provides a low-temperature heat management system 200 for an extended-range new energy automobile, comprising:
a battery manager 210 for detecting the cell temperature of the battery pack in real time to obtain real-time temperature detection data;
an ambient temperature sensor 220 for monitoring an ambient temperature at which the vehicle is located;
networking means 230 for obtaining weather conditions in real time on a network;
and the whole vehicle controller 240 integrates a thermal management controller and an city increasing system controller, is connected with the battery manager, the ambient temperature sensor and the networking device, and realizes the temperature control of the battery pack. Preferably, the overall vehicle controller is a thermal management master.
The invention provides a low-temperature heat management method of a range-extended new energy automobile, which comprises the steps of generating electricity through a range extender according to the lowest temperature of a battery and the lowest environmental temperature, performing heating control through a battery PTC, balancing the electric quantity of a battery pack and the temperature of the battery pack, and ensuring that the battery pack can realize good performance in a low-temperature environment.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (9)
1. A low-temperature heat management method of a range-extending new energy automobile is characterized by comprising the following steps:
detecting the temperature of a single body of the battery pack in real time to obtain real-time temperature detection data;
the temperature detection data are stored in a segmented mode to form multi-segment temperature detection data;
respectively checking the stored temperature detection data of each section by combining with the running record of the automobile to obtain the lowest temperature of the battery;
acquiring a weather state in real time, and acquiring the lowest environmental temperature by combining the current running environment of the automobile;
generating electricity through a range extender according to the lowest temperature of the battery and the lowest ambient temperature, and performing heating control through a battery PTC (positive temperature coefficient), so as to balance the electric quantity of the battery pack and the temperature of the battery pack;
combining with the automobile running record, respectively checking the stored temperature detection data of each section to obtain the lowest temperature of the battery, and comprising the following steps:
acquiring an automobile running record;
setting a running threshold value and comparing the running threshold value with a running record value;
if the running record value is larger than the running threshold value, judging that the automobile has long-distance running activity;
if the automobile has long-distance running activity, sequencing the stored temperature detection data of each section, and removing the abnormal jump data and the temperature abnormal data during power-on to obtain checked temperature data;
and calculating the lowest temperature of the battery according to the verified temperature data.
2. The extended range new energy automobile low temperature management method according to claim 1, wherein the obtaining weather status in real time and obtaining the lowest environmental temperature in combination with the current driving environment of the automobile comprises:
acquiring weather states in real time through vehicle networking so as to determine the use environment of the vehicle;
a quantization table of the usage environment of the vehicle is established,
and determining the lowest environment temperature by combining the quantization table of the use environment.
3. The extended range new energy automobile low temperature heat management method according to claim 2, wherein generating electricity through an extended range device according to the lowest temperature of the battery and the lowest ambient temperature and performing heating control through a battery PTC to balance the electric quantity of the battery pack and the temperature of the battery pack, comprising:
when the lowest temperature of the battery pack monomer is lower than the temperature threshold value and the environment temperature is lower than the environment threshold value, generating electricity through the range extender to enable the electric quantity of the power battery to be higher than a first electric quantity value, and simultaneously performing heating control through the battery PTC to enable the temperature of the power battery pack to be higher than the first temperature value;
when the lowest temperature of the battery pack monomer is lower than the temperature threshold and the environment temperature is higher than the environment threshold, the whole vehicle controller generates electricity through the range extender, so that the electric quantity of the power battery is between a second electric quantity value and a third electric quantity value, heating control is carried out through the battery PTC, and the temperature of the power battery is between the second temperature value and the third temperature value;
when the temperature of the power battery pack is higher than the temperature threshold and the ambient temperature is lower than the temperature threshold, the whole vehicle controller generates power through the range increase, so that the electric quantity of the power battery is between a fourth electric quantity value and a fifth electric quantity value, and the power battery is maintained between the fourth temperature value and the fifth temperature value through heating control by the battery PTC;
when the temperature of the power battery pack is higher than the temperature threshold and the ambient temperature is higher than the temperature threshold, the whole vehicle controller generates power through the range increase, so that the electric quantity of the power battery is between a sixth electric quantity value and a seventh electric quantity value, and the battery PTC is used for heating control, so that the temperature of the power battery is maintained between the sixth temperature value and the seventh temperature value.
4. The extended range new energy automobile low temperature management method according to claim 2, wherein the method is characterized in that the minimum battery temperature is obtained by respectively checking each section of stored temperature detection data in combination with an automobile running record, and specifically comprises the following steps:
and (3) checking the lowest temperature of the battery pack monomer for 4 times, eliminating the current power-on or 1-time temperature abnormality of the vehicle, simultaneously recording whether a user has long-distance driving activity, storing the battery temperature for 4 times, and checking and determining the lowest temperature of the battery.
5. The extended range new energy automobile low temperature management method of claim 3, wherein the temperature threshold is: -6 degrees celsius, the environmental threshold is: -18 degrees celsius.
6. The extended range new energy automobile low temperature heat management method of claim 5, wherein the first electric quantity value is: 0.9; the second electric quantity value is: 0.7; the third electrical quantity value is 0.65; the fourth electrical quantity value is: 0.6; the fifth electric quantity value is 0.4; the sixth electric quantity value is 0.3; the seventh electrical value is 0.2.
7. The extended range new energy automobile low temperature management method of claim 6, wherein the first temperature value is: -2 degrees celsius; the second temperature value is: 1 degree celsius; the third temperature value is: 3 degrees celsius; the fourth temperature value is: 5 ℃; the fifth temperature value is: 8 degrees celsius; the sixth temperature value is: 12 degrees celsius; the seventh temperature value is: 18 degrees celsius.
8. A low-temperature heat management system for a new energy automobile with extended range, which adopts the low-temperature heat management method for the new energy automobile with extended range according to any one of claims 1-7, and is characterized by comprising:
the battery manager is used for detecting the single temperature of the battery pack in real time to obtain real-time temperature detection data;
the environment temperature sensor is used for monitoring the environment temperature of the vehicle;
a networking device for obtaining weather conditions in real time on a network;
and the whole vehicle controller integrates a thermal management controller and a range-extending system controller, is connected with the battery manager, the ambient temperature sensor and the networking device, and realizes the temperature control of the battery pack.
9. The extended range new energy automobile low temperature management system of claim 8, wherein the whole automobile controller is a thermal management master controller.
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