CN111244579A - Battery thermal management system and electric vehicle - Google Patents
Battery thermal management system and electric vehicle Download PDFInfo
- Publication number
- CN111244579A CN111244579A CN201811449126.1A CN201811449126A CN111244579A CN 111244579 A CN111244579 A CN 111244579A CN 201811449126 A CN201811449126 A CN 201811449126A CN 111244579 A CN111244579 A CN 111244579A
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- Prior art keywords
- battery pack
- lithium battery
- management system
- thermal management
- coolant
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
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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
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
- H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
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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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
-
- 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)
- Secondary Cells (AREA)
- Automation & Control Theory (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a battery thermal management system, which comprises a lithium battery pack, a battery pack and a controller, wherein the lithium battery pack is used for providing high-voltage current input for a vehicle in a normal-temperature environment; the storage battery pack is connected with the lithium battery pack in parallel and used for providing high-voltage current input for a vehicle in a low-temperature environment; the battery management module is used for selecting a power supply battery pack according to the temperature of the lithium battery pack, and controlling the storage battery pack to supply power to the refrigerant subsystem and the coolant subsystem when the temperature of the lithium battery pack is lower than a preset temperature threshold; the refrigerant subsystem comprises a compressor and a heat exchange device, wherein the compressor and the heat exchange device are connected through a pipeline to form a loop; a coolant subsystem, coolant of the coolant subsystem circulating through the heat exchange device and the lithium battery pack for preheating the lithium battery pack. By implementing the invention, the influence of starting the power battery in a low-temperature environment on the electric quantity and the service life of the power battery can be reduced.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a battery thermal management system.
Background
The new energy vehicle is a novel vehicle which is developed at present, and comprises a hybrid electric vehicle, a pure electric vehicle, a fuel cell electric vehicle and the like, wherein the electric vehicle takes a vehicle-mounted power battery as power, so that the service life and the electric quantity of the battery are one of important factors for measuring the electric vehicle, and the service environment temperature of the battery has a particularly prominent influence on the service life and the electric quantity of the battery.
In order to reduce the influence of the ambient temperature on the battery, when the vehicle is used in winter, the battery is generally heated to a certain temperature by adopting a PTC mode, and the heating mode has two obvious defects, namely that the PTC heating needs to consume more heat of the battery, and the battery temperature is lower in the initial stage, and the battery discharges to prolong the service life of the battery and consume more electric quantity. Therefore, a new method is urgently needed to solve the problem of severe power consumption in winter and the influence of battery discharge in a low-temperature environment on the service life of the battery.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a battery thermal management system, which heats a power battery through an air conditioning system when the temperature of the battery for starting an electric vehicle is low, so as to solve the problem of influence of starting the power battery in a low temperature environment on the electric quantity and the service life of the power battery.
The invention provides a battery thermal management system in a first aspect, which comprises a lithium battery pack, a battery module and a controller, wherein the lithium battery pack is used for providing high-voltage current input for a vehicle in a normal-temperature environment; the storage battery pack is connected with the lithium battery pack in parallel and used for providing high-voltage current input for a vehicle in a low-temperature environment; the battery management module is used for selecting a power supply battery pack according to the temperature of the lithium battery pack, and controlling the storage battery pack to supply power to the refrigerant subsystem and the coolant subsystem when the temperature of the lithium battery pack is lower than a preset temperature threshold; the refrigerant subsystem comprises a compressor and a heat exchange device, wherein the compressor and the heat exchange device are connected through a pipeline to form a loop; a coolant subsystem, coolant of the coolant subsystem circulating through the heat exchange device and the lithium battery pack for preheating the lithium battery pack.
Further, when the temperature of the lithium battery pack is greater than or equal to a preset temperature threshold value, the battery management module controls the lithium battery pack to provide high-voltage current input for an electric vehicle and charge the battery pack.
Further, the refrigerant subsystem comprises a regulating valve, and the regulating valve is arranged between the compressor and the heat exchange device and used for regulating the flow of the refrigerant according to requirements.
Further, the coolant subsystem comprises a water pump, and the water pump drives the coolant to circulate through the heat exchange device and the lithium battery pack.
Further, heat transfer device is including the first flat pipe and the flat pipe of second of setting in turn, first flat pipe is used for supplying the refrigerant circulation, the flat pipe of second is used for supplying the refrigerant circulation.
Further, a radiating fin is arranged between the first flat pipe and the second flat pipe.
Further, the battery pack is integrated with the lithium battery pack.
Further, the lithium battery pack is a ternary lithium battery pack.
Further, the storage battery pack is a nickel-metal hydride battery pack.
A first aspect of the invention provides an electric vehicle comprising a battery thermal management system as claimed in any one of claims 1 to 9.
Due to the technical scheme, the invention has the following beneficial effects:
the battery thermal management system can automatically detect the temperature of the lithium battery pack, and when the temperature of the lithium battery pack is low, the nickel-hydrogen battery pack is controlled to supply power to the battery thermal management system, the battery thermal management system heats the lithium battery pack, and when the lithium battery pack reaches a preset temperature threshold value, the battery thermal management system controls the lithium battery pack to supply power to a vehicle and charge the battery pack, so that adverse effects on the electric quantity and the service life of the vehicle caused by the power supply of the lithium battery pack in a low-temperature environment are avoided;
the storage battery pack is low in price, and the cost of the whole vehicle is not greatly increased;
the battery thermal management system is simple in structure, can be realized by connecting a group of storage battery packs in parallel on the basis of the conventional lithium battery pack, does not need to be configured independently, and reduces the arrangement difficulty.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a battery thermal management system provided in the present invention.
In the drawings:
1-lithium battery pack 2-storage battery pack 3-compressor
4-heat exchange device 5-regulating valve 6-water pump
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Example one
As shown in fig. 1, a battery thermal management system provided for an embodiment of the present invention includes a lithium battery pack 1, a battery pack 2, a battery management module, a refrigerant subsystem and a coolant subsystem, wherein the lithium battery pack 1 is configured to provide a high-voltage current input for a vehicle in a normal temperature environment, the battery pack 2 is connected in parallel with the lithium battery pack 1 and is configured to provide a high-voltage current input for the vehicle in a low temperature environment, the battery management module is configured to select a power supply battery pack according to a temperature of the lithium battery pack 1, when the temperature of the lithium battery pack 1 is lower than a preset temperature threshold, the battery pack 2 is controlled to supply power to the refrigerant subsystem and the coolant subsystem, the refrigerant subsystem includes a compressor 3 and a heat exchange device 4, the compressor 3 and the heat exchange device 4 are connected by a pipeline to form a loop, a coolant of the coolant subsystem circulates through the heat exchange device 4 and the lithium battery pack 1, for preheating the lithium battery 1.
In some possible embodiments, the battery management module comprises a temperature detection unit for detecting the temperature of the lithium battery pack 1, and a control unit for determining the size of the temperature data detected by the temperature detection unit and controlling the power supply of the lithium battery pack 1 and the battery pack 2 according to the determination result, wherein when the temperature detection unit detects that the temperature of the lithium battery pack 1 is lower than a preset temperature threshold, the control unit controls the battery pack 2 to supply power to the refrigerant subsystem and the coolant subsystem, and simultaneously, the battery pack 2 is used for providing high-voltage current input for starting the electric vehicle for starting the vehicle; when the temperature of the lithium battery pack 1 is greater than or equal to a preset temperature threshold value, the battery management module controls the lithium battery pack 1 to provide high-voltage current input for an electric vehicle and charge the storage battery pack 2.
In some possible embodiments, the refrigerant subsystem comprises a regulating valve 5, said regulating valve 5 being arranged between the compressor 3 and the heat exchange means 4 for regulating the flow of refrigerant according to demand.
In some possible embodiments, the coolant subsystem includes a water pump 6, and the water pump 6 circulates the coolant through the heat exchange device 4 and the lithium battery pack 1.
In some possible embodiments, the heat exchanging device 4 includes a first flat tube and a second flat tube alternately arranged, the first flat tube is used for circulating a refrigerant, the second flat tube is used for circulating a coolant, and a heat dissipating fin is arranged between the first flat tube and the second flat tube to increase a heat exchanging area between the first flat tube and the second flat tube.
In some possible embodiments, the storage battery pack 2 and the lithium battery pack 1 are integrated, so that a separate arrangement is not needed, and the arrangement difficulty is reduced.
In some possible embodiments, the lithium battery pack 1 is a ternary lithium battery pack 1, and the battery pack 2 is a nickel metal hydride battery pack.
Accordingly, when a vehicle equipped with the battery thermal management system is started, the battery management module detects the temperature of the lithium battery pack 1, and it should be noted that, at this time, the battery management module is supplied with low-voltage current by the lithium battery pack 1, when it detects that the temperature of the lithium battery pack 1 is lower than a preset temperature threshold, the battery pack 2 is controlled to supply power to the compressor 3 and the water pump 6, the refrigerant subsystem and the coolant subsystem start to operate, the compressor 3 compresses refrigerant into high-temperature and high-pressure gas, the high-temperature and high-pressure refrigerant gas flows into a first flat pipe of the cooling device through a pipeline and a regulating valve 5 and releases heat in the first flat pipe, the coolant of the coolant subsystem flows into a second flat pipe of the cooling device through a pipeline under the action of the water pump 6, and as the second flat pipe and the first flat pipe are arranged alternately, the cooling liquid in the second flat tube absorbs the heat emitted by the refrigerant in the first flat tube, and the cooling liquid after absorbing the heat flows through the lithium battery pack 1 under the action of the water pump 6 to heat the lithium battery pack 1.
When the battery management module detects that the temperature of the lithium battery pack 1 is greater than or equal to a preset temperature threshold value, the storage battery pack 2 is controlled to stop supplying power, the lithium battery pack 1 is switched to supply power to the vehicle, and the lithium battery pack 1 also charges the storage battery pack 2.
Example two
An embodiment of the invention provides an electric vehicle, which comprises any one of the battery thermal management systems.
The electric vehicle can select the storage battery pack 2 to supply power to the vehicle under the condition of low external environment temperature, so that the use of the lithium battery pack 1 in a low-temperature environment is avoided, and the service life and the electric quantity of the lithium battery pack 1 are prolonged.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A battery thermal management system, comprising:
the lithium battery pack (1) is used for providing high-voltage current input for a vehicle in a normal-temperature environment;
the storage battery pack (2) is connected with the lithium battery pack (1) in parallel and used for providing high-voltage current input for a vehicle in a low-temperature environment;
the battery management module is used for selecting a power supply battery pack according to the temperature of the lithium battery pack (1), and controlling the storage battery pack (2) to supply power to the refrigerant subsystem and the coolant subsystem when the temperature of the lithium battery pack (1) is lower than a preset temperature threshold;
the refrigerant subsystem comprises a compressor (3) and a heat exchange device (4), wherein the compressor (3) and the heat exchange device (4) are connected through a pipeline to form a loop;
a coolant subsystem whose coolant circulates through the heat exchange device (4) and the lithium battery pack (1) for preheating the lithium battery pack (1).
2. The battery thermal management system according to claim 1, wherein when the temperature of the lithium battery pack (1) is greater than or equal to a preset temperature threshold, the battery management module controls the lithium battery pack (1) to provide a high-voltage current input for an electric vehicle and charge the battery pack (2).
3. A battery thermal management system according to claim 1, characterized in that the refrigerant subsystem comprises a regulating valve (5), said regulating valve (5) being arranged between the compressor (3) and the heat exchanging means (4) for regulating the flow of refrigerant according to demand.
4. The battery thermal management system of claim 1, wherein the coolant subsystem comprises a water pump (6), and the water pump (6) circulates coolant through the heat exchanging device (4) and the lithium battery pack (1).
5. The battery thermal management system according to claim 1, wherein the heat exchange device (4) comprises a first flat pipe and a second flat pipe which are alternately arranged, wherein the first flat pipe is used for circulating a refrigerant, and the second flat pipe is used for circulating a coolant.
6. The battery thermal management system of claim 5, wherein a heat sink fin is disposed between the first flat tube and the second flat tube.
7. A battery thermal management system according to claim 1, characterized in that the battery pack (2) is integrated with the lithium battery pack (1).
8. A battery thermal management system according to claim 1, characterized in that the lithium battery pack (1) is a ternary lithium battery pack.
9. A battery thermal management system according to claim 1, characterized in that the battery pack (2) is a nickel-metal hydride battery pack.
10. An electric vehicle comprising a battery thermal management system according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811449126.1A CN111244579B (en) | 2018-11-28 | 2018-11-28 | Battery thermal management system and electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811449126.1A CN111244579B (en) | 2018-11-28 | 2018-11-28 | Battery thermal management system and electric vehicle |
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| Publication Number | Publication Date |
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| CN111244579A true CN111244579A (en) | 2020-06-05 |
| CN111244579B CN111244579B (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811449126.1A Active CN111244579B (en) | 2018-11-28 | 2018-11-28 | Battery thermal management system and electric vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750648A (en) * | 2022-05-09 | 2022-07-15 | 深圳市东方芯愿新能源有限公司 | Power battery pack temperature control system adopting heat pump and electric automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1126032A (en) * | 1997-07-02 | 1999-01-29 | Nissan Motor Co Ltd | Battery heating-up device for electric vehicle |
| US20060022646A1 (en) * | 2004-07-28 | 2006-02-02 | Moore Stephen W | Method for battery cold-temperature warm-up mechanism using cell equilization hardware |
| CN203521558U (en) * | 2013-10-19 | 2014-04-02 | 潍柴动力股份有限公司 | Low-temperature controlling device of hybrid vehicle battery system |
| CN203617733U (en) * | 2013-10-29 | 2014-05-28 | 北汽福田汽车股份有限公司 | Power battery pack heating system of electric automobile and electric automobile |
| CN104578235A (en) * | 2013-08-29 | 2015-04-29 | 三菱自动车工业株式会社 | Electric vehicle charging system |
| CN105720319A (en) * | 2016-05-09 | 2016-06-29 | 深圳市赛尔盈电子有限公司 | PTC heater and power battery heating and cooling device |
| CN105914422A (en) * | 2016-06-17 | 2016-08-31 | 哲弗智能系统（上海）有限公司 | Thermal management system for new energy vehicle power battery |
| CN208142314U (en) * | 2018-05-25 | 2018-11-23 | 北京车和家信息技术有限公司 | battery thermal management system and vehicle |
-
2018
- 2018-11-28 CN CN201811449126.1A patent/CN111244579B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1126032A (en) * | 1997-07-02 | 1999-01-29 | Nissan Motor Co Ltd | Battery heating-up device for electric vehicle |
| US20060022646A1 (en) * | 2004-07-28 | 2006-02-02 | Moore Stephen W | Method for battery cold-temperature warm-up mechanism using cell equilization hardware |
| CN104578235A (en) * | 2013-08-29 | 2015-04-29 | 三菱自动车工业株式会社 | Electric vehicle charging system |
| CN203521558U (en) * | 2013-10-19 | 2014-04-02 | 潍柴动力股份有限公司 | Low-temperature controlling device of hybrid vehicle battery system |
| CN203617733U (en) * | 2013-10-29 | 2014-05-28 | 北汽福田汽车股份有限公司 | Power battery pack heating system of electric automobile and electric automobile |
| CN105720319A (en) * | 2016-05-09 | 2016-06-29 | 深圳市赛尔盈电子有限公司 | PTC heater and power battery heating and cooling device |
| CN105914422A (en) * | 2016-06-17 | 2016-08-31 | 哲弗智能系统（上海）有限公司 | Thermal management system for new energy vehicle power battery |
| CN208142314U (en) * | 2018-05-25 | 2018-11-23 | 北京车和家信息技术有限公司 | battery thermal management system and vehicle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750648A (en) * | 2022-05-09 | 2022-07-15 | 深圳市东方芯愿新能源有限公司 | Power battery pack temperature control system adopting heat pump and electric automobile |
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| CN111244579B (en) | 2022-05-10 |
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Effective date of registration: 20230808 Address after: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Patentee after: Chongqing Ruilan Automobile Research Institute Co.,Ltd. Address before: No.3366 Weiwu Road, dajiangdong Industrial Cluster District, Hangzhou, Zhejiang Province Patentee before: ZHEJIANG JIZHI NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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