CN109273793A - The battery constant temperature system of electric vehicle course continuation mileage is maintained under low temperature environment - Google Patents
The battery constant temperature system of electric vehicle course continuation mileage is maintained under low temperature environment Download PDFInfo
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- CN109273793A CN109273793A CN201810972724.0A CN201810972724A CN109273793A CN 109273793 A CN109273793 A CN 109273793A CN 201810972724 A CN201810972724 A CN 201810972724A CN 109273793 A CN109273793 A CN 109273793A
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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
- H01M10/613—Cooling or keeping cold
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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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of 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
- H01M10/62—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
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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
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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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
- H01M10/637—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
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention provides the battery constant temperature systems that electric vehicle course continuation mileage is maintained under a kind of low temperature environment, include multiple temperature sensors, multiple heat-sink units, multiple heating units, master control borad, heater switch and master switch, multiple temperature sensors, multiple heating units and master control borad are connect with battery pack, and the outer surface of every piece of battery is respectively mounted a temperature sensor；Each side and bottom surface of every piece of battery are respectively mounted a heat-sink unit, and a heating unit is respectively mounted on each electric heating unit, and heater switch is switch open in usual, are connected in the heating circuit of heating unit and battery pack composition, and connect with master control borad；Master switch is normally closed type switch, it is connected on the major loop of battery pack, and it is connect with master control borad, the present invention can be when ambient temperature be low, it is maintained at battery temperature within the scope of convenient temperature, to avoid battery performance from declining, electric vehicle course continuation mileage and battery life are not influenced under low temperature environment, and structure is simple, at low cost.
Description
Technical field
The invention belongs to battery technology fields, and in particular to the battery of electric vehicle course continuation mileage is maintained under a kind of low temperature environment
Constant temperature system.
Background technique
Electric vehicle (including electric car, battery-operated motor cycle, electro-tricycle and electric bicycle) is since it is without environment dirt
Dye, every kilometer of cost of use are low, are rapidly developed at home, especially in cities and towns and rural area.But current battery technology
Lagging in development causes battery capacity and service life to be unable to satisfy user for the demand of course continuation mileage and service life, especially
In winter under low temperature environment, battery durable mileage can be greatly shortened, and battery life can be also greatly lowered, and replace one group of battery
Expense again costly.
At present for the battery heating system under electric vehicle low temperature environment, have some products in the market, but due to valence
Lattice are expensive and develop generally as preceding installing is standby with vehicle synchronous, therefore are mainly used in the high high speed electric automobile of price valence.
The reasons such as cost are limited by substantially not for low-speed electronic automobile, battery-operated motor cycle, electro-tricycle, electric bicycle etc.
Similar products or equipment are installed.Any processing is not carried out substantially for above-mentioned battery of electric vehicle currently on the market, only
The measure filled behind part is to be kept the temperature using muff, but battery temperature is still lower under low temperature environment, therefore for continuous
Boat mileage and battery do not have too big improvement.
Summary of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide one kind can be low in ambient temperature
When, it is maintained at battery temperature within the scope of convenient temperature, so that battery performance be avoided to decline, electricity is not influenced under low temperature environment
Motor-car course continuation mileage and battery life, and the battery of electric vehicle course continuation mileage is maintained under simple, the at low cost low temperature environment of structure
Constant temperature system.
The present invention provides the battery constant temperature system for maintaining electric vehicle course continuation mileage under a kind of low temperature environment, feature exists
In, comprising: multiple temperature sensors are connect with battery pack, and each temperature sensor is mounted on the outer surface of one piece of battery
On, the temperature for real-time detection battery；
Heat-sink unit is installed on the battery pack, for so that temperature is consistent everywhere in battery pack；
Heating unit connect composition heating circuit with the battery pack, is mounted on the heat-sink unit, and the heating
Unit and all temperature sensor intervals are greater than preset distance；
Master control borad is connect with battery pack；
Heater switch is arranged on heating circuit, connect with the mainboard, and the heater switch is switch open in usual, institute
State the open and close that master control borad controls the heater switch；
Master switch is connected on the major loop of the battery pack, and is connect with the master control borad, and the master switch is normally closed
Formula switch, the master control borad control the disconnection and closure of the master switch,
Wherein, when electric vehicle charges or after igniting, the master control borad obtains every piece of the temperature sensor acquisition in real time
The temperature of battery, and by all temperature sensors of same time acquisition Temperature Treatment be mean temperature, according to mean temperature,
Whether the electricity and charged state of battery pack control the heater switch and close or open, be more than danger threshold according to mean temperature
The disconnection and closure of the master switch are controlled,
When mean temperature is lower than temperature lowest threshold, the master control borad is controlled according to the electricity and charged state of battery pack
The heater switch closes or opens, when the electricity of battery pack lower than electricity lowest threshold and it is uncharged when, the master control borad control
It makes the heater switch to open, heating unit does not heat battery pack, when the electricity of battery pack is higher than electricity lowest threshold
Or when being in charged state, the master control borad controls the heater switch closure, and heating unit starts to heat battery pack,
When mean temperature is higher than temperature highest threshold value, the master control borad controls the heater switch and disconnects, the heating
Unit does not heat battery pack,
When mean temperature is more than danger threshold, the master control borad controls the master switch and disconnects, and is cut to battery pack and fills
The power supply of electricity or battery pack.
Further, in the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment provided by the invention, also
Can have such feature: the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment further includes temperature switch,
The temperature switch is normally closed type switch, connects, is connected on the major loop of the battery pack with the master switch, and the temperature
Degree switch abuts battery pack, is more than danger threshold when the temperature of battery pack increases, it is disconnected that the master control borad does not control the master switch
When opening, the temperature switch is disconnected, and is cut to battery pack charging or the power supply of battery pack.
Further, in the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment provided by the invention, also
Can have such feature: the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment further includes muff, packet
It is rolled in the outside of battery pack, the temperature sensor, the heat-sink unit, the heating unit, the temperature switch is located at institute
It states in muff.
Further, in the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment provided by the invention, also
It can have such feature: where the battery pack includes the battery of at least two pieces series connections, the temperature switch and institute
Master switch is stated to be connected on the route of any two pieces of batteries connection.
Further, in the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment provided by the invention, also
Can have such feature: the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment further includes buzzer, with
The master control borad connection, when electric vehicle is in driving states, when the average value of the temperature of all temperature sensor acquisitions
Buzzing alarm is carried out when more than danger threshold.
Further, in the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment provided by the invention, also
It can have such feature: where when mean temperature is more than danger threshold, if being in charged state, the master control borad
It controls the master switch to disconnect, is cut to battery pack charging, if being in driving states, the master control borad continues in mean temperature
After the danger threshold predetermined time, controls the master switch and disconnect, cut off battery-powered.
Further, in the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment provided by the invention, also
It can have such feature: where the heat-sink unit includes multiple radiating components, and the radiating component is mounted on every block of electricity
Each side wall in pond and bottom.
Further, in the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment provided by the invention, also
It can have such feature: where the heating unit includes multiple heating components, and a heating is respectively mounted on each battery
Component.
Further, in the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment provided by the invention, also
Can have such feature: the temperature sensor is pasted on battery by silica gel, and the heat-sink unit is viscous by silica gel
It pastes on the battery pack, and silica gel is uniformly filled between the heat-sink unit and battery pack.
Further, in the battery constant temperature system that electric vehicle course continuation mileage is maintained under low temperature environment provided by the invention, also
Can have such feature: the muff is the low foam of the coefficient of heat conduction.
Advantages of the present invention is as follows:
The battery constant temperature system for maintaining electric vehicle course continuation mileage under related low temperature environment according to the present invention, because every
It has been respectively mounted temperature sensor on block battery, has been capable of the temperature of real-time monitoring battery；It is mounted with heating unit in battery pack, is used for
Heating unit is heated, has been respectively mounted heat-sink unit on every piece of battery, for so that temperature is basic everywhere in every piece of battery
It is consistent, is provided with heater switch open in usual, heater switch and master in the heating circuit of heating unit and battery pack composition
Control plate connection, electricity and the charged state control of the mean temperature, battery pack that are measured by master control borad according to all temperature sensors
The closure and opening of heater switch, are provided with the master switch of normally closed type on the major loop of battery pack, by master control borad according to all
The mean temperature that temperature sensor measures whether be more than danger threshold control master switch closure and opening, it is therefore, of the invention
The battery constant temperature system of electric vehicle course continuation mileage is maintained under low temperature environment to carry out when ambient temperature is low for battery pack
Heating does not influence electronic so that battery pack is maintained at than in convenient environment, improving battery cell performance under low temperature environment
Vehicle course continuation mileage and battery life, and the heating to battery pack can be stopped, and in battery when battery pack temperature is excessively high
When the temperature of group is higher than danger threshold, cutting is to battery pack charging or battery pack supplying power for outside, so that high temperature be avoided to influence battery
Service life, or even cause the danger such as fire, and structure is simple, at low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of battery pack in the present invention；
Fig. 2 is the circuit diagram for maintaining the battery constant temperature system of electric vehicle course continuation mileage in the present invention under low temperature environment；
Fig. 3 is another connection type figure of master switch and temperature switch in the present invention；
Fig. 4 is the control flow chart of control panel in the present invention.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
It applies example combination attached drawing and maintains the battery constant temperature system of electric vehicle course continuation mileage to be specifically addressed under low temperature environment of the present invention.
The power supply of electric vehicle is usually to provide electric energy by battery pack by forming battery pack after the series connection of muti-piece battery for electric car.
As shown in Figure 1 and Figure 2, the battery constant temperature system for electric vehicle course continuation mileage being maintained under low temperature environment includes: multiple temperature
Sensor 10, heat-sink unit 20, heating unit 30, master control borad 40, master switch 50, heater switch 60.
Each temperature sensor 10 is connect with battery pack 200, provides electric energy by battery pack 200 for it.As shown in Fig. 2,
Multiple temperature sensors 10 are connected in series in battery pack 200.As shown in Figure 1, being respectively mounted one on the outer surface of every piece of battery
Temperature sensor 10, the temperature for the real-time detection block battery.
Heat-sink unit 20 is mounted in battery pack 200, for so that temperature is consistent everywhere in battery pack.In this implementation
In example, heat-sink unit 20 includes multiple radiating components, and radiating component is mounted on each side and bottom surface of every piece of battery, be used for so that
Temperature is consistent everywhere in every piece of battery.In the present embodiment, heat-sink unit 20 passes through the good substances of thermal diffusivities such as silica gel
It is pasted on battery, and silica gel 21 is uniformly filled between heat-sink unit 20 and battery pack.Specifically, radiating component is metal
Piece is pasted between sheet metal and battery uniformly across silica gel 21.
Heating unit 30 connect composition heating circuit with battery pack 200, and heating unit 30 is mounted on heat-sink unit 20.Add
Hot cell 30 is used to be heated for battery pack 200.Heating unit 30 and all temperature sensor intervals are greater than preset distance, should
When preset distance heats heating unit 30 to battery, in error range to the temperature of temperature sensor measurement battery.This
For sample heating unit 30 when heating to battery, the influence to temperature sensor is small, will not be because of with a distance from heating unit 30
It is too close, and keep the temperature of temperature sensor excessively high, influence measurement result.
In the present embodiment, single 30 yuan of heating include multiple heating components, are respectively mounted a heating component on each battery.
Specifically, composition heating circuit is connect with battery pack after multiple heating component series connection.Specifically, heating component is heating sheet.
In the present embodiment, optimal when only having one piece of battery in battery pack, temperature sensor 10 on battery and plus
The distance between hot cell 30 is maximum distance between the two on the block battery.When in battery pack including muti-piece battery, often
Temperature sensor 10 on a battery not only should be from the temperature sensor preset distance on the battery, but also will be apart from adjacent electricity
Temperature sensor preset distance on pond is just avoided that when heating unit heats battery in this way and detects to temperature sensor
The temperature of battery produce bigger effect.It specifically, can be by the adding on the block battery of the temperature sensor on every piece of battery
The distance that heating unit on hot cell and adjacent cell maintains like, and the distance is that two heating of temperature sensor distance are single
The maximum distance of member.
Master switch 50 is normally closed type switch, is connected on the major loop of battery pack 200, which includes external circuit and electricity
Circuit in pond.And master switch 50 is connect with master control borad 40, and the disconnection of master switch 50 is controlled by master control borad 40.
Heater switch 60 is switch open in usual, is connected in heating circuit, heater switch 60 is connect with master control borad 40.By leading
The open and close that plate 40 controls heater switch 60 is controlled, to control whether heating unit is that battery pack is heated.
In the present embodiment, the battery constant temperature system 100 for electric vehicle course continuation mileage being maintained under low temperature environment further includes temperature
Switch 70, muff 80 and buzzer 90.
Temperature switch 70 is normally closed type switch, is connected with master switch 50, and the master that temperature switch 70 is connected to battery pack 200 returns
On the road, and battery pack 200 is abutted, for cutting off the charge circuit and current supply circuit of battery pack.Temperature switch 70 is in all temperature
The mean temperature of the battery temperature of sensor acquisition is higher than danger threshold, and (temperature of battery pack 200 is higher than temperature switch 70 at this time
Given threshold), due to failing to control when master control borad exception or abnormality of temperature sensors or electric heating module occur abnormal
Master switch 50 processed cut off the power charging or power supply power supply when, temperature switch 70 can disconnect automatically, be cut to battery pack in time
Charging or battery-powered, to avoid the excessively high influence battery life of battery temperature, even cause the danger such as fire.Work as battery
The temperature of group 200 is closed automatically when being lower than 70 given threshold of temperature switch.In this patent, the setting of the temperature switch 70 of selection
It is corresponding that threshold value is more than or equal to the battery pack when the mean temperature for the battery temperature that all temperature sensors acquire is higher than danger threshold
Temperature.
Muff 80 is wrapped in the outside of battery pack, temperature sensor 10, heat-sink unit 20, heating unit 30.For subtracting
The heat exchange of few battery pack and external environment, to reduce the thermal loss of battery pack 200.Temperature switch 70 is arranged in muff
In 80, such temperature switch 70 can preferably perceive the temperature of battery pack 200.In the present embodiment, muff 80 is that heat passes
The low foam of coefficient is led to be made.
In the present embodiment, as shown in figure 3, temperature is opened when battery pack 200 includes the battery of at least two pieces series connections
Pass 70 is connected on the route that any two pieces of batteries connect after can also connecting with master switch 50.Since battery is serially connected in electricity
Usually several pieces of batteries are put together when the group of pond, and temperature switch 70 is connected in series in any two pieces of batteries with master switch 50 and connects
Route on, enable temperature switch preferably to perceive the temperature of battery pack, so as to electromagnetism group temperature be more than danger threshold,
And master switch 50 is due to failing cutting electricity when master control borad exception or abnormality of temperature sensors or abnormal electric heating module appearance
When source charging or power supply power supply, it can disconnect automatically, be cut to the charging or battery-powered of battery pack in time.
Buzzer 90 is connect with master control borad 40, when electric vehicle is in driving states, when all temperature sensors are adopted
Beep sound alarm when the average value of the temperature of collection is more than danger threshold.
Master control borad 40 is connect with battery pack 200, and battery pack 200 provides electric energy for it.When electric vehicle charging or after igniting,
Master control borad 40 obtains the temperature of every piece of battery of temperature sensor acquisition in real time, and all temperature sensors of same time are adopted
The Temperature Treatment integrated controls heater switch 60 according to mean temperature, the electricity of battery pack and charged state and is closed as mean temperature
Or it opens.According to mean temperature whether be more than danger threshold control master switch 50 disconnection and closure.
When mean temperature is lower than temperature lowest threshold, electricity and charged state control of the master control borad 40 according to battery pack 200
Heater switch 60 processed closes or opens, when the electricity of battery pack 200 lower than electricity lowest threshold and it is uncharged when, master control borad 40 control
Heater switch 60 processed is opened, and heating unit 30 does not heat battery pack；When the electricity of battery pack 200 is higher than the minimum threshold of electricity
When being worth or being in charged state, the master control borad controls the heater switch closure, and heating unit starts to add battery
Heat.
When mean temperature is higher than temperature highest threshold value, master control borad 40 controls heater switch 60 and disconnects, and heating unit 30 is not
Battery pack is heated.
When mean temperature be more than danger threshold when, master control borad 40 control master switch 50 disconnect, be cut to battery pack charging or
The power supply of battery pack, to avoid the excessively high influence battery life of battery temperature, even cause the danger such as fire.In the present embodiment
In, when mean temperature is more than danger threshold, if being in charged state, master control borad 40 controls master switch 50 and disconnects, and is cut to
Battery pack charging；If being in driving states, master control borad 40 is after mean temperature is continued above the danger threshold predetermined time, control
Master switch 50 disconnects, and cuts off battery-powered.The predetermined time can be set as 5s, 6s, 10s etc..
As shown in figure 4, the specific control flow of master control borad 40 is as follows:
Step S1, electric vehicle charge when or igniting.
Step S2, master control borad 40 obtain the temperature of every piece of battery of each temperature sensor acquisition in real time, and by the same time
All temperature sensors acquisition Temperature Treatment be mean temperature.
In the normal range whether step S3 judge mean temperature.If so, i.e. mean temperature in the normal range when, temperature
Switch 70 is in normally off to degree, master switch 50 is in normally off, heater switch 60 is in normally open, the battery of electric vehicle
Group 200 works normally, that is, charges normal or normal power supply.And return step S2.If it is not, i.e. mean temperature is not in normal model
In enclosing, then S4 is entered step.
Step S4 judges that mean temperature is less than temperature lowest threshold and is also above temperature highest threshold value.If mean temperature
Lower than temperature lowest threshold, then S5 is entered step；If mean temperature is higher than temperature highest threshold value, S9 is entered step.
Step S5, judges whether the electricity of battery pack is lower than electricity lowest threshold and uncharged, if so, the electricity of i.e. battery pack
Amount then enters step S6 lower than electricity lowest threshold and uncharged；If it is not, the electricity of i.e. battery pack be higher than electricity lowest threshold or
Person is in charged state, then enters step S7.
Step S6, master control borad 40 control heater switch 60 and disconnect, and heating unit 30 does not heat for battery, because opening at this time
Heating unit 30 to battery heated consumed by electricity ratio it is more by the electricity that will be improved after battery heat temperature raising, because
This does not open heating unit 30, to reduce the kwh loss of battery pack.Subsequently into step S8.
Step S7, master control borad 40 control heater switch 60 and are closed, and heating unit 30 is battery heating.Then return step
S2。
Step S8, electric vehicle electricity exhaust, and stop working, or artificial execute is stopped working.
Step S9, master control borad 40 control heater switch 60 and disconnect, and heating unit 30 does not heat for battery.Subsequently into step
S10。
Step S10, judges whether mean temperature is higher than danger threshold, if it is not, i.e. mean temperature be lower than danger threshold, then into
Enter step S2；If so, i.e. mean temperature is higher than danger threshold, then S11 is entered step.
Step S11 judges electric vehicle current state, if electric vehicle is in charged state, enters step S12；If electronic
Vehicle is in driving states, then enters step S13.
Step S12, master control borad 40 control master switch 50 and disconnect, and are cut to battery pack charging.
Step S13, master control borad 40 control buzzer 90 and carry out buzzing alarm.Subsequently into step S14.
Step S14 after the predetermined time, judges whether mean temperature is more than also danger threshold, if it is not, then entering step S2；
If so, entering step S15.
Step S15, master control borad 40 control master switch 50 and disconnect, be cut to battery-powered.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (10)
1. maintaining the battery constant temperature system of electric vehicle course continuation mileage under a kind of low temperature environment characterized by comprising
Multiple temperature sensors, connect with battery pack, and each temperature sensor is mounted on the outer surface of one piece of battery, use
In the temperature of real-time detection battery；
Heat-sink unit is installed on the battery pack, for so that temperature is consistent everywhere in battery pack；
Heating unit connect composition heating circuit with the battery pack, is mounted on the heat-sink unit, and the heating unit
It is greater than preset distance with all temperature sensor intervals；
Master control borad is connect with battery pack；
Heater switch is arranged on heating circuit, connect with the mainboard, and the heater switch is switch open in usual, the master
Control plate controls the open and close of the heater switch；
Master switch is connected on the major loop of the battery pack, and is connect with the master control borad, and the master switch is opened for normally closed type
It closing, the master control borad controls the disconnection and closure of the master switch,
Wherein, when electric vehicle charges or after igniting, the master control borad obtains every piece of battery of the temperature sensor acquisition in real time
Temperature, and by all temperature sensors of same time acquisition Temperature Treatment be mean temperature, according to mean temperature, battery
Whether the electricity and charged state of group control the heater switch and close or open, be more than danger threshold control according to mean temperature
The disconnection and closure of the master switch,
When mean temperature is lower than temperature lowest threshold, the master control borad is according to the electricity of battery pack and charged state control
Heater switch closes or opens, when the electricity of battery pack lower than electricity lowest threshold and it is uncharged when, the master control borad controls institute
Heater switch opening is stated, heating unit does not heat battery pack, when the electricity of battery pack is higher than electricity lowest threshold or place
When charged state, the master control borad controls the heater switch closure, and heating unit starts to heat battery pack,
When mean temperature is higher than temperature highest threshold value, the master control borad controls the heater switch and disconnects, the heating unit
Battery pack is not heated,
When mean temperature is more than danger threshold, the master control borad controls the master switch and disconnects, be cut to battery pack charging or
The power supply of battery pack.
2. maintaining the battery constant temperature system of electric vehicle course continuation mileage under low temperature environment according to claim 1, feature exists
In, further includes:
Temperature switch, the temperature switch are normally closed type switch, are connected with the master switch, and the master for being connected to the battery pack returns
On the road, and the temperature switch abuts battery pack, is more than danger threshold when the temperature of battery pack increases, the master control borad does not control
When the master switch disconnects, the temperature switch is disconnected, and is cut to battery pack charging or the power supply of battery pack.
3. maintaining the battery constant temperature system of electric vehicle course continuation mileage under low temperature environment according to claim 2, feature exists
In, further includes:
Muff is wrapped in the outside of battery pack, the temperature sensor, the heat-sink unit, the heating unit, the temperature
Degree switch is located in the muff.
4. maintaining the battery constant temperature system of electric vehicle course continuation mileage under low temperature environment according to claim 2, feature exists
In:
The battery pack includes the battery of at least two pieces series connections, and the temperature switch and the master switch are connected to any two
On the route of block battery connection.
5. maintaining the battery constant temperature system of electric vehicle course continuation mileage under low temperature environment according to claim 1, feature exists
In, further includes:
Buzzer is connect with the master control borad, when electric vehicle is in driving states, when all temperature sensor acquisitions
Buzzing alarm is carried out when the average value of temperature is more than danger threshold.
6. maintaining the battery constant temperature system of electric vehicle course continuation mileage under low temperature environment according to claim 1, feature exists
In:
When mean temperature is more than danger threshold, if being in charged state, the master control borad controls the master switch and disconnects, and cuts
Break and charge for battery pack, if being in driving states, the master control borad is continued above the danger threshold predetermined time in mean temperature
Afterwards, it controls the master switch to disconnect, cut off battery-powered.
7. maintaining the battery constant temperature system of electric vehicle course continuation mileage under low temperature environment according to claim 1, feature exists
In:
The heat-sink unit includes multiple radiating components, and the radiating component is mounted on each side wall and bottom of every piece of battery.
8. maintaining the battery constant temperature system of electric vehicle course continuation mileage under low temperature environment according to claim 1, feature exists
In:
The heating unit includes multiple heating components, and a heating component is respectively mounted on each battery.
9. maintaining the battery constant temperature system of electric vehicle course continuation mileage under low temperature environment according to claim 1, feature exists
In:
The temperature sensor is pasted on battery by silica gel, and the heat-sink unit is pasted on the battery pack by silica gel, and
Silica gel is uniformly filled between the heat-sink unit and battery pack.
10. maintaining the battery constant temperature system of electric vehicle course continuation mileage under low temperature environment according to claim 1, feature exists
In:
The muff is the low foam of the coefficient of heat conduction.
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