CN112531233A - Battery heat preservation method of electric vehicle - Google Patents
Battery heat preservation method of electric vehicle Download PDFInfo
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- CN112531233A CN112531233A CN202011386250.5A CN202011386250A CN112531233A CN 112531233 A CN112531233 A CN 112531233A CN 202011386250 A CN202011386250 A CN 202011386250A CN 112531233 A CN112531233 A CN 112531233A
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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
- H01M10/62—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
- H01M10/637—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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- 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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/643—Cylindrical cells
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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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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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
- H01M10/65—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
-
- 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
- H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
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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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- 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)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a battery heat preservation method of an electric vehicle. The method comprises the following steps: when the battery control system judges that the received temperature value is higher than the rated working temperature value of the battery, the heat of the battery is transmitted to the first phase change energy storage layer; when the temperature of the second phase change energy storage layer is higher than the temperature of the external environment, the heat of the second phase change energy storage layer is conducted to the water tank through the heat exchange device; when the temperature of the second phase change energy storage layer is lower than the temperature of the external environment, the liquid in the water tank can be heated through the heating device, and the heated liquid circularly heats the heat exchange pipeline through the water pump, so that heat is released to the second phase change energy storage layer. The invention realizes the absorption, storage and release of heat by utilizing the heat-insulating layer, can provide heat for the battery without additional consumption of electric energy, and maintains the working temperature of the battery.
Description
Technical Field
The invention relates to the technical field of battery thermal management, in particular to a battery heat preservation method of an electric vehicle.
Background
The endurance mileage and the battery life of the electric vehicle are greatly influenced by the ambient temperature, because the electrolyte in the chemical battery, especially the lithium battery, generates current by the potential difference between the positive electrode and the negative electrode through chemical reaction. Under a low-temperature environment, the electrolyte moves slowly, so that the movement activity of the electrolyte between a positive electrode and a negative electrode is influenced, the charge and discharge performance of the battery is reduced, the capacity of the battery is reduced, the internal resistance is increased, the discharge efficiency is reduced, and the endurance mileage cannot be ensured.
Disclosure of Invention
The invention aims to provide a battery heat preservation method of an electric vehicle, which realizes heat transfer between a battery and a phase change energy storage layer, improves the heat management efficiency and realizes the function integration of heat dissipation and heating.
In order to achieve the above object, the present invention provides a battery insulation method for an electric vehicle, comprising:
when electric motor car battery began work, the temperature sensor who is connected with the battery sends the temperature value of sensing to battery control system in real time, works as battery control system judges that the temperature value received is higher than or is less than the rated operating temperature value of battery, then controls heat transfer system and intervenes work, heat transfer system includes:
a heat-insulating case in which the battery is disposed;
a first heat transfer sheet disposed on a bottom plate of the battery;
the first phase-change energy storage layer is filled with a phase-change energy storage material and is arranged between the heat-insulating shell and the battery;
a second heat transfer sheet provided between the first heat transfer sheet and the first phase change energy storage layer;
the conduction controller controls the connection or disconnection among the first heat transfer sheet, the second heat transfer sheet and the first phase change energy storage layer;
the second phase change energy storage layer is arranged on the outer wall of the heat preservation shell;
a heat exchange device, comprising: a water tank outside the thermal insulation case; a water pump; the heat exchange pipeline is arranged in the second phase change energy storage layer and is communicated with the water tank through the water pump;
when the battery control system judges that the received temperature value is higher than the rated working temperature value of the battery, the battery control system controls a heat transfer system to intervene in working, the heat transfer system controls a conduction controller to control communication among a first heat transfer sheet, a second heat transfer sheet and a first phase-change energy storage layer, and the heat of the battery is transferred to the first phase-change energy storage layer; when the battery control system judges that the received temperature value is within the rated working temperature value range of the battery, the heat transfer system controls the conduction controller to control the first heat transfer sheet, the second heat transfer sheet and the first phase change energy storage layer to be disconnected; when the battery control system judges that the received temperature value is lower than the rated working temperature value of the battery, the battery control system controls a heat transfer system to intervene in working, the heat transfer system controls a conduction controller to control a first heat transfer sheet, a second heat transfer sheet and a first phase change energy storage layer to be communicated, and heat of the first phase change energy storage layer is transferred to the battery; when the temperature of the second phase change energy storage layer is higher than the external environment temperature, the heat of the second phase change energy storage layer is conducted to the water tank through a heat exchange device; when the temperature of the second phase change energy storage layer is lower than the external environment temperature, the liquid in the water tank can be heated through the heating device, and the heated liquid circularly heats the heat exchange pipeline through the water pump, so that heat is released to the second phase change energy storage layer.
The preferred scheme is as follows: the first phase-change energy storage layer and the second phase-change energy storage layer are filled with phase-change materials, and the phase-change materials are at least one of paraffin, fatty acid and alcohol.
The preferred scheme is as follows: the conduction controller is a PLC controller.
The preferred scheme is as follows: and supplying power to the heating device through the solar cell so as to heat the liquid in the water tank.
The preferred scheme is as follows: the heating device is a heating rod.
The preferred scheme is as follows: when the battery is charged by an external power supply, the heat energy converted from the electric energy of the power supply is absorbed by the second phase change energy storage layer arranged on the outer wall of the heat preservation shell of the battery.
The preferred scheme is as follows: the electric vehicle battery is a battery pack formed by a plurality of dry batteries.
The preferred scheme is as follows: the battery is a cylindrical battery or a rectangular battery.
The invention has the beneficial effects that:
1. the heat preservation layer is utilized to realize the absorption, the storage and the release of heat, and the heat can be provided for the battery without additional consumption of electric energy, so that the working temperature of the battery is maintained;
2. the invention further combines the heat exchange device, improves the heat preservation efficiency, prolongs the heat preservation time, and further reduces the influence of low temperature on the endurance mileage of the electric vehicle;
3. the phase-change energy storage layer has high phase-change latent heat in reaction, absorbs a large amount of heat, effectively controls the over-temperature of the battery, and when the external environment temperature is too low, the heat generated by the battery is accumulated in the phase-change layer, so that the working temperature of the battery is effectively ensured.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic diagram of the heat transfer system of the present invention. .
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by a user of ordinary skill in the art.
As shown in fig. 1, the present invention provides a method for preserving the temperature of a battery of an electric vehicle, comprising the steps of:
when electric motor car battery 1 began work, the temperature sensor who is connected with battery 1 sends the temperature value of sensing to battery control system in real time, works as battery control system judges that the temperature value received is higher than or is less than the rated operating temperature value of battery, then controls heat transfer system and intervenes work, heat transfer system includes:
a heat-insulating case 2 in which the battery 1 is disposed;
a first heat transfer sheet provided on a bottom plate of the battery 1;
the first phase-change energy storage layer 4 is filled with a phase-change energy storage material and is arranged between the heat preservation shell 2 and the battery 1;
a second heat transfer sheet provided between the first heat transfer sheet and the first phase change energy storage layer 4;
the conduction controller controls the connection or disconnection among the first heat transfer sheet, the second heat transfer sheet and the first phase change energy storage layer;
the second phase change energy storage layer 3 is arranged on the outer wall of the heat preservation shell 2;
a heat exchange device 5 comprising: a water tank 51 outside the thermal insulation case 2; a water pump 52; a heat exchange pipe 53 provided in the second phase change energy storage layer 3 and communicating with the water tank 51 through the water pump 52;
when the battery control system judges that the received temperature value is higher than the rated working temperature value of the battery, the battery control system controls a heat transfer system to intervene in working, the heat transfer system controls a conduction controller to control communication among a first heat transfer sheet, a second heat transfer sheet and a first phase-change energy storage layer, and the heat of the battery is transferred to the first phase-change energy storage layer; when the battery control system judges that the received temperature value is within the rated working temperature value range of the battery, the heat transfer system controls the conduction controller to control the first heat transfer sheet, the second heat transfer sheet and the first phase change energy storage layer to be disconnected; when the battery control system judges that the received temperature value is lower than the rated working temperature value of the battery, the battery control system controls a heat transfer system to intervene in working, the heat transfer system controls a conduction controller to control a first heat transfer sheet, a second heat transfer sheet and a first phase change energy storage layer to be communicated, and heat of the first phase change energy storage layer is transferred to the battery; when the temperature of the second phase change energy storage layer is higher than the external environment temperature, the heat of the second phase change energy storage layer is conducted to the water tank through a heat exchange device; when the temperature of the second phase change energy storage layer is lower than the external environment temperature, the liquid in the water tank can be heated through the heating device, and the heated liquid circularly heats the heat exchange pipeline through the water pump, so that heat is released to the second phase change energy storage layer.
In another embodiment of the present invention, the first phase-change energy storage layer 4 and the second phase-change energy storage layer 3 are filled with a phase-change material, and the phase-change material is at least one of paraffin, fatty acid, alcohol, and the like. The selection of the phase-change material needs to have proper phase-change temperature, the phase-change temperature is consistent with the controlled target temperature of the battery, and only then can the function of phase-change latent heat be fully exerted, and the highest temperature of the battery can be controlled within the phase-change temperature range of the phase-change material. In addition, the phase-change material has higher phase-change latent heat, and the higher the phase-change latent heat means that the heat storage density of the phase-change material per unit mass is higher, so that the using amount of the phase-change material can be reduced. Preferably, the phase change material is paraffin (the carbon number is 12-33), the latent heat of phase change of the paraffin (the carbon number is 12-33) is 50-270J/g, and the phase change temperature is-12-72 ℃. Preferably, the phase change material is fatty acid (the number of carbon atoms is 10-18), the latent heat of phase change of the fatty acid (the number of carbon atoms is 10-18) is 150-260J/g, and the phase change temperature is 30-70 ℃.
In another embodiment of the present invention, the conduction controller is a PLC controller.
In another embodiment of the present invention, the heating device is powered by a solar cell to heat the liquid in the water tank.
In another embodiment of the present invention, the heating device is a heating rod.
In another embodiment of the present invention, when the battery is charged by an external power source, the second phase change energy storage layer disposed on the outer wall of the thermal insulation shell of the battery absorbs the heat energy converted from the electric energy of the power source.
In another embodiment of the present invention, the electric vehicle battery is a battery pack formed of several dry batteries.
In another embodiment of the present invention, the battery is a cylindrical battery or a rectangular battery.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A method for preserving the temperature of a battery of an electric vehicle, the method comprising:
when electric motor car battery began work, the temperature sensor who is connected with the battery sends the temperature value of sensing to battery control system in real time, works as battery control system judges that the temperature value received is higher than or is less than the rated operating temperature value of battery, then controls heat transfer system and intervenes work, heat transfer system includes:
a heat-insulating case in which the battery is disposed;
a first heat transfer sheet disposed on a bottom plate of the battery;
the first phase-change energy storage layer is filled with a phase-change energy storage material and is arranged between the heat-insulating shell and the battery;
a second heat transfer sheet provided between the first heat transfer sheet and the first phase change energy storage layer;
the conduction controller controls the connection or disconnection among the first heat transfer sheet, the second heat transfer sheet and the first phase change energy storage layer;
the second phase change energy storage layer is arranged on the outer wall of the heat preservation shell;
a heat exchange device, comprising: a water tank outside the thermal insulation case; a water pump; the heat exchange pipeline is arranged in the second phase change energy storage layer and is communicated with the water tank through the water pump;
when the battery control system judges that the received temperature value is higher than the rated working temperature value of the battery, the battery control system controls a heat transfer system to intervene in working, the heat transfer system controls a conduction controller to control communication among a first heat transfer sheet, a second heat transfer sheet and a first phase-change energy storage layer, and the heat of the battery is transferred to the first phase-change energy storage layer; when the battery control system judges that the received temperature value is within the rated working temperature value range of the battery, the heat transfer system controls the conduction controller to control the first heat transfer sheet, the second heat transfer sheet and the first phase change energy storage layer to be disconnected; when the battery control system judges that the received temperature value is lower than the rated working temperature value of the battery, the battery control system controls a heat transfer system to intervene in working, the heat transfer system controls a conduction controller to control a first heat transfer sheet, a second heat transfer sheet and a first phase change energy storage layer to be communicated, and heat of the first phase change energy storage layer is transferred to the battery; when the temperature of the second phase change energy storage layer is higher than the external environment temperature, the heat of the second phase change energy storage layer is conducted to the water tank through a heat exchange device; when the temperature of the second phase change energy storage layer is lower than the external environment temperature, the liquid in the water tank can be heated through the heating device, and the heated liquid circularly heats the heat exchange pipeline through the water pump, so that heat is released to the second phase change energy storage layer.
2. The method for preserving the temperature of the battery of the electric vehicle as recited in claim 1, wherein the first phase-change energy storage layer and the second phase-change energy storage layer are filled with a phase-change material, and the phase-change material is at least one of paraffin, fatty acid and alcohol.
3. The method for preserving battery temperature of an electric vehicle as claimed in claim 1, wherein the conduction controller is a PLC controller.
4. The method for keeping the battery of an electric vehicle warm as claimed in claim 1, wherein power is supplied to a heating device through a solar cell to heat the liquid in the water tank.
5. The method for preserving battery temperature of an electric vehicle as claimed in claim 4, wherein the heating means is a heating rod.
6. The method for preserving battery temperature of an electric vehicle as claimed in claim 1, wherein when the battery is charged from an external power source, the heat energy converted from the electric power of the power source is absorbed by the second phase change energy storage layer provided on the outer wall of the heat preservation case of the battery.
7. The method for keeping the battery temperature of an electric vehicle as recited in claim 1, wherein the electric vehicle battery is a battery pack consisting of a plurality of dry batteries.
8. The method for preserving battery temperature of an electric vehicle as claimed in claim 1, wherein the battery is a cylindrical battery or a rectangular battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011386250.5A CN112531233A (en) | 2020-12-01 | 2020-12-01 | Battery heat preservation method of electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011386250.5A CN112531233A (en) | 2020-12-01 | 2020-12-01 | Battery heat preservation method of electric vehicle |
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| CN112531233A true CN112531233A (en) | 2021-03-19 |
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| CN202011386250.5A Pending CN112531233A (en) | 2020-12-01 | 2020-12-01 | Battery heat preservation method of electric vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105838A (en) * | 2021-05-12 | 2021-07-13 | 苏州环明电子科技有限公司 | Programmable stepped heat dissipation and temperature control film for electronic equipment |
| CN114156569A (en) * | 2021-11-30 | 2022-03-08 | 南方电网电力科技股份有限公司 | Temperature control layer suitable for energy storage device |
| CN114361656A (en) * | 2021-12-29 | 2022-04-15 | 广东工业大学 | Battery and temperature control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113105838A (en) * | 2021-05-12 | 2021-07-13 | 苏州环明电子科技有限公司 | Programmable stepped heat dissipation and temperature control film for electronic equipment |
| CN114156569A (en) * | 2021-11-30 | 2022-03-08 | 南方电网电力科技股份有限公司 | Temperature control layer suitable for energy storage device |
| CN114361656A (en) * | 2021-12-29 | 2022-04-15 | 广东工业大学 | Battery and temperature control method thereof |
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Application publication date: 20210319 |