CN111048864B - A thermal management subassembly, battery module and vehicle for battery module - Google Patents
A thermal management subassembly, battery module and vehicle for battery module Download PDFInfo
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- CN111048864B CN111048864B CN201811182877.1A CN201811182877A CN111048864B CN 111048864 B CN111048864 B CN 111048864B CN 201811182877 A CN201811182877 A CN 201811182877A CN 111048864 B CN111048864 B CN 111048864B
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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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
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
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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
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6572—Peltier elements or thermoelectric devices
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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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The present invention relates to a thermal management assembly for a battery module, a battery module including the thermal management assembly, and a vehicle including the battery module. The thermal management assembly comprises: the heat conduction piece is suitable for being arranged inside the battery module and is in direct contact with a battery core of the battery module; the fixed bottom plate is fixed on a shell which limits a battery cavity of the battery module and abuts against the heat conducting piece; a heat dissipating fin fixed to the fixing base plate by means of at least one fixing member; and a peltier device arranged between the fixing base plate and the heat dissipation fin for cooling/heating the battery cell. This kind of thermal management subassembly has integrateed cooling, heating and the constant temperature function that the battery module needs, and the risk that no coolant liquid leaked can make the battery module lightweight to the great problem of upper and lower difference in temperature when having solved electric core cooling/heating, thereby make the temperature of battery module be controlled in the optimum within range.
Description
Technical Field
The invention relates to the technical field of thermal management of battery modules, in particular to a thermal management assembly for a battery module. The invention also relates to a battery module comprising such a thermal management assembly, and to a vehicle, in particular an electric or hybrid vehicle, comprising such a battery module.
Background
In order to improve the safety of a thermal management system of a battery module, particularly a power battery module of an electric vehicle or a hybrid vehicle, and to ensure heat dissipation efficiency and accuracy of temperature regulation, it is known that thermal management of the battery module may be achieved by using a peltier device.
The document CN106549197A discloses a method for regulating and controlling the temperature of a battery module by means of peltier devices, which maintains the temperature difference inside the battery module within a certain temperature range through different control modes, thereby achieving the purpose of regulating and controlling the temperature of the battery module.
Documents US2017110775a1 and CN104170156A both disclose battery modules with peltier devices for the purpose of contacting a cooled object from an end of a battery pack of the battery module to thereby achieve heat conduction from the battery pack to a heat sink, however, in the case of the battery pack, when end cooling is employed, an excessive temperature difference between the upper and lower sides of a cell of the battery pack is easily caused, which is detrimental to the service life of the battery pack.
Document CN102918703A also discloses a battery module with peltier devices, in which a substrate forming a sealed cavity is used to implement heat conduction between the cell and the heat dissipation component, however, such a sealed cavity is difficult to ensure airtightness and difficult to manufacture, and the cell does not directly contact with the heat conduction component, and needs to conduct heat with the aid of air, so that the heat conduction efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a thermal management assembly for a battery module, which integrates the cooling, heating and constant temperature functions required by the battery module, can lighten the battery module, solves the problem of large vertical temperature difference during the cooling/heating of a battery core, and controls the temperature of the battery module in an optimal range, so that the whole service life of the battery module is longer.
To this end, a first aspect of the present invention provides a thermal management assembly for a battery module, the thermal management assembly including: a thermal conduction member adapted to be disposed inside the battery module and to be in direct contact with a cell of the battery module; a fixing base plate fixed to a case defining a battery cavity of the battery module and abutting against the heat conductive member; a heat dissipating fin fixed to the fixing base plate by means of at least one fixing member; and a peltier device arranged between the fixing base plate and the heat dissipation fin for cooling/heating the battery cell.
According to a preferred embodiment of the present invention, a heat conductive adhesive or a heat conductive pad is filled between the fixing base plate and the heat dissipating fins.
According to a preferred embodiment of the present invention, the heat conductive member is configured as a heat conductive plate provided with a plurality of openings through which the battery cells pass, and is arranged at a substantially central position of the battery cells.
According to a preferred embodiment of the invention, the fastening base plate is provided with a heat-conducting recess, which rests against the heat-conducting plate.
According to a preferred embodiment of the present invention, the fixing base plate is provided with a plurality of fastening holes, and the fastening holes are adapted to cooperate with fixing fasteners provided on the housing to fix the thermal management assembly on the housing.
According to a preferred embodiment of the present invention, the fixed base plate includes at least one protruding portion extending substantially perpendicularly from an edge thereof, the protruding portion being provided with a fixing structure for fixing the heat dissipation fin to the fixed base plate.
A second aspect of the present invention provides a battery module including: the battery pack is composed of a plurality of rows of battery cells; a first casing and a second casing that delimit a battery cavity that accommodates the battery cell and that fix the battery cell at both ends of the battery cell; and at least one thermal management assembly according to the first aspect of the present invention, wherein the thermal conductive member is disposed between the first case and the second case, and the fixed base plate is fixed to the first case and the second case.
According to a preferred embodiment of the present invention, the battery module includes two of the thermal management members, which are arranged in a symmetrical manner with respect to the battery cavity.
According to a preferred embodiment of the present invention, the first shell and the second shell are respectively provided with a fixing buckle, and the fixing buckle is matched with a clamping hole provided on the fixing bottom plate to fix the thermal management assembly on the first shell and the second shell.
A third aspect of the invention provides a vehicle that is an electric vehicle or a hybrid vehicle, characterized by including the battery module according to the second aspect of the invention.
The thermal management assembly for a battery module according to the present invention has several advantages compared to the prior art, particularly:
the invention integrates the cooling, heating and constant temperature functions required by the battery module, and has high temperature regulation precision, convenient cold-heat conversion and rapid heat conduction;
when the battery core is cooled or heated at the same time, the temperature difference between the upper part and the lower part of the battery core is relatively small, the heat conduction is uniform, and the service life of the battery core is prolonged;
no moving parts, simple structure, small size, light weight, not affected by space solutions, high overall safety, thus saving costs, and being able to be widely applied to various types of battery modules, in particular to power battery modules for electric or hybrid vehicles;
the heating efficiency of the heat management assembly is far higher than that of a PTC (thermistor) heater which is generally used, and meanwhile, the heat management assembly is noiseless, vibration-free, environment-friendly and high in reliability.
Drawings
Other features and advantages of the present invention will be better understood by the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.
Fig. 1 is an exploded schematic view of a preferred embodiment of a battery module according to the present invention.
Detailed Description
The practice and use of the embodiments are discussed in detail below. It should be understood, however, that the specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention.
In order to better illustrate the internal structure of the battery module and the thermal management assembly thereof according to the present invention, a preferred embodiment of such a battery module is shown by means of an exploded schematic view of fig. 1. Fig. 1 is not only for explanation of the present invention but also for limitation of the present invention as necessary.
Referring to fig. 1, the battery module according to the present invention includes a battery pack, a first case 11, a second case 12, and at least one thermal management assembly.
The battery pack is composed of a plurality of rows of cells (for example, cylindrical cells) 9, wherein the arrangement of the cells 9 is not fixed and can be set according to actual needs. For example, the number of the battery cells 9 in each row can be the same or different, two adjacent rows of the battery cells 9 can be arranged in alignment or staggered, and so on.
The first case 11 and the second case 12 delimit a battery cavity that accommodates the battery cell 9, and fix the battery cell 9 at both ends of the battery cell 9. Note that, the battery cavity is not closed, and the first casing 11 and the second casing 12 may be respectively opened with a plurality of openings corresponding to the number of the battery cells 9 for limiting, fixing, and electrically connecting the battery cells 9 to each other. According to a preferred embodiment, the first shell 11 and the second shell 12 are provided with a first fixing catch 13 and a second fixing catch 14, respectively, for fixing at least one thermal management assembly.
In the non-limiting embodiment shown in fig. 1, the battery module according to the present invention includes first and second thermal management members that are simultaneously fixed to the first and second cases 11 and 12 and are arranged in a symmetrical manner with respect to the battery cavity so as to more uniformly transfer heat at both sides of the battery cavity.
The first thermal management assembly comprises a thermal conductor, a first fixed base plate 7, a first heat dissipating fin 1 and a first peltier device 4.
The heat conduction member is suitable for being arranged inside the battery module and is in direct contact with a battery core of the battery module. According to a preferred embodiment, the heat-conducting member is configured in the form of a heat-conducting plate 10, the heat-conducting plate 10 being arranged between the first shell 11 and the second shell 12. The heat conductive plate 10 has a certain thickness and is opened with a plurality of openings through which the battery cells 9 pass, for passing through the battery cells 9 at substantially the center in the height direction of the battery cells 9. Different from the existing arrangement, the arrangement can ensure that the upper and lower temperature difference of the battery cell 9 is relatively small when the battery cell is cooled or heated simultaneously, the heat conduction is uniform, and the service life of the battery cell 9 is prolonged.
The first fixing base plate 7 is preferably provided with a plurality of first fastening holes 16, and the first fastening holes 16 are matched with the first fixing buckles 13 arranged on the first shell 11 and the second fixing buckles 14 arranged on the second shell 12 so as to fix the first thermal management assembly on the first shell 11 and the second shell 12. Of course, this manner of connection between the first thermal management assembly and the first and second housings 11 and 12 is not limiting, and the first thermal management assembly may be fixed to the first and second housings 11 and 12 by other means (e.g., screw connection, etc.).
It is also preferred that the first fixed base 7 is provided with a first heat-conducting groove 71, the bottom of the first heat-conducting groove 71 being adapted to abut against the heat-conducting plate 10 (more particularly against one of the outer surfaces 101 of the heat-conducting plate 10) for heat transfer with the heat-conducting plate 10.
It is also preferable that the first fixed base plate 7 includes at least one (four in the embodiment of fig. 1) first protruding portion 72 extending substantially perpendicularly from an edge thereof, each of the first protruding portions opening a first fixing hole 73 through which the first screw 5 passes for fixing the first heat dissipation fin 1 to the first fixed base plate 7 by means of the first screw 5. Of course, this manner of connection between the first heat dissipating fin 1 and the first fixing base 7 is not restrictive. In an embodiment, not shown, the first fixing base plate 7 includes at least one first clamping member extending from an edge thereof, and the first heat dissipating fin 1 is provided with a first receiving portion corresponding to the first clamping member, so that the first heat dissipating fin 1 is clamped on the first fixing base plate 7.
The substantially plate-shaped first peltier device 4 is arranged between the first fixing base plate 7 and the first heat radiating fin 1, and when the first heat radiating fin 1 is fixed to the first fixing base plate 7, two opposite side surfaces of the first peltier device 4 are respectively made to be a cold side and a hot side, and are abutted against the first fixing base plate 7 and the first heat radiating fin 1. Between the first fixing base plate 7 and the first heat dissipating fin 1 (more specifically, between the first fixing base plate 7 and the first peltier device 4 and between the first peltier device 4 and the first heat dissipating fin 1), a heat conductive glue or a heat conductive pad may be filled to ensure a heat conductive effect.
Similar to the first thermal management assembly, the second thermal management assembly comprises a thermal conductor, a second fixed base plate 8, a second heat dissipating fin 2 and a second peltier device 3.
In the non-limiting embodiment shown in fig. 1, the thermally conductive plate 10 is a common thermally conductive member of the first thermal management assembly and the second thermal management assembly. The heat-conducting plate 10 can conduct heat of the battery cell 9 to the first and second fixing base plates 7 and 8, respectively, to more uniformly transfer heat at both sides of the battery cavity. Of course, the first thermal management assembly and the second thermal management assembly may respectively include different heat conductive members for respectively transferring heat of different battery cells 9.
The second fixing base plate 8 is preferably provided with a plurality of second fastening holes 15, and the second fastening holes 15 are matched with the first fixing buckles 13 arranged on the first shell 11 and the second fixing buckles 14 arranged on the second shell 12 so as to fix the second thermal management assembly on the first shell 11 and the second shell 12. Of course, this manner of connection between the second thermal management assembly and the first and second housings 11 and 12 is not limiting, and the second thermal management assembly may be fixed to the first and second housings 11 and 12 by other means (e.g., screw connection, etc.).
It is also preferred that the second fixed base 8 is provided with a second heat-conducting groove 81, the bottom of the second heat-conducting groove 81 being adapted to abut against the heat-conducting plate 10 (more particularly against one of the outer surfaces 101 of the heat-conducting plate 10) for heat transfer with the heat-conducting plate 10.
It is also preferable that the second fixing base plate 8 includes at least one (four in the embodiment of fig. 1) second protruding portion 82 extending substantially perpendicularly from an edge thereof, each of the second protruding portions opening a second fixing hole 83 for passing the second screw 6 therethrough for fixing the second heat dissipation fin 2 to the second fixing base plate 8 by means of the second screw 6. Of course, this manner of connection between the second heat dissipating fins 2 and the second fixing base plate 8 is not restrictive. In an embodiment, not shown, the second fixing base plate 8 includes at least one second clamping member extending from an edge thereof, and the second heat dissipating fin 2 is provided with a second receiving portion corresponding to the second clamping member, so that the second heat dissipating fin 2 is clamped on the second fixing base plate 8.
The substantially plate-shaped second peltier device 3 is arranged between the second fixing base plate 8 and the second heat radiating fin 2, and when the second heat radiating fin 2 is fixed to the second fixing base plate 8, two opposite side surfaces of the second peltier device 3 are respectively made to be a cold side and a hot side, and are abutted against the second fixing base plate 8 and the second heat radiating fin 2. Between the second fixing base plate 8 and the second heat dissipating fin 2 (more specifically, between the second fixing base plate 8 and the second peltier device 3 and between the second peltier device 3 and the second heat dissipating fin 2) may be filled with a heat conductive glue or a heat conductive pad to ensure a heat conductive effect.
The invention mainly utilizes the Peltier device to cool/heat the battery module. The shape, number and specific position between the fixing bases 7, 8 and the heat dissipating fins 1, 2 of the peltier devices 3, 4 are not fixed and may be set according to actual needs. According to the invention, when the battery cell 9 needs to be cooled, the power supply of the Peltier device is switched on, the contact ends of the Peltier devices 3 and 4 and the fixed bottom plates 7 and 8 are cold ends, the battery cell 9 is cooled through the fixed bottom plates 7 and 8 and the heat conducting plate 10, and meanwhile, the heat of the hot ends of the Peltier devices 3 and 4 is dissipated through the radiating fins 1 and 2. When the electric core 9 needs to be heated, only the current input to the peltier devices 3 and 4 needs to be reversed (the positive and negative power supplies of the peltier devices 3 and 4 are reversed), the cold ends of the peltier devices 3 and 4 become hot ends, and the generated heat can be transferred to the heat conducting plate 10 through the fixed bottom plates 7 and 8, so that the purpose of heating the electric core 9 is achieved.
While the technical content and the technical features of the invention have been disclosed, it is understood that various changes and modifications of the disclosed concept can be made by those skilled in the art within the spirit of the invention, and the invention is not limited thereto.
The above description of embodiments is intended to be illustrative, and not restrictive, and the scope of the invention is defined by the appended claims.
Claims (9)
1. A thermal management assembly for a battery module, the thermal management assembly comprising:
a heat conductive member adapted to be arranged inside the battery module and in direct contact with a cell of the battery module, wherein the heat conductive member is configured as a heat conductive plate (10), the heat conductive plate (10) is provided with a plurality of openings through which the cell passes, and is arranged at a substantially central position of the cell;
a fixing base plate (7, 8), wherein the fixing base plate (7, 8) is fixed on a shell which limits a battery cavity of the battery module and is abutted against the heat conducting piece;
-cooling fins (1, 2), said cooling fins (1, 2) being fixed to said fixing base plate (7, 8) by means of at least one fixing part; and
peltier devices (3, 4), which Peltier devices (3, 4) are arranged between the fixing base plates (7, 8) and the heat dissipation fins (1, 2) for cooling/heating the cells.
2. The thermal management assembly according to claim 1, characterized in that a thermally conductive glue or pad is filled between the fixing base plate (7, 8) and the heat dissipating fins (1, 2).
3. The heat management assembly according to claim 2, characterized in that the fixing base plate (7, 8) is provided with heat conducting grooves (71, 81), the heat conducting grooves (71, 81) resting on the heat conducting plate (10).
4. The thermal management assembly according to any of the claims 1 to 3, characterized in that said fixing bases (7, 8) are provided with a plurality of snap holes (15, 16), said snap holes (15, 16) being adapted to cooperate with fixing snaps (13, 14) provided on said housing for fixing said thermal management assembly on said housing.
5. A heat managing assembly according to anyone of claims 1 to 3, characterized in that the fixed base plate (7, 8) comprises at least one protrusion (72, 82) extending substantially perpendicularly from an edge thereof, which protrusion is provided with a fixing structure for fixing the heat dissipating fin (1, 2) on the fixed base plate (7, 8).
6. The utility model provides a battery module which characterized in that, battery module includes:
a battery pack consisting of a plurality of rows of cells (9);
a first housing (11) and a second housing (12), wherein the first housing (11) and the second housing (12) delimit a battery chamber accommodating the battery cell (9), and the battery cell (9) is fixed at both ends of the battery cell (9); and
at least one thermal management assembly according to any of claims 1 to 5, wherein the thermal conductor is arranged between the first housing (11) and the second housing (12), the fixed base plate (7, 8) being fixed to the first housing (11) and the second housing (12).
7. The battery module of claim 6, comprising two of the thermal management components arranged in a symmetrical manner with respect to the battery cavity.
8. The battery module according to claim 6 or 7, wherein the first housing (11) and the second housing (12) are respectively provided with fixing buckles (13, 14), and the fixing buckles (13, 14) are matched with clamping holes (15, 16) formed in the fixing base plates (7, 8) so that the thermal management assembly is fixed on the first housing (11) and the second housing (12).
9. A vehicle that is an electric vehicle or a hybrid vehicle, characterized by comprising the battery module according to any one of claims 6 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811182877.1A CN111048864B (en) | 2018-10-11 | 2018-10-11 | A thermal management subassembly, battery module and vehicle for battery module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811182877.1A CN111048864B (en) | 2018-10-11 | 2018-10-11 | A thermal management subassembly, battery module and vehicle for battery module |
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| CN111048864A CN111048864A (en) | 2020-04-21 |
| CN111048864B true CN111048864B (en) | 2021-07-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111540983B (en) * | 2020-05-12 | 2020-12-08 | 西华大学 | Distributed temperature equalization device and temperature equalization method for battery pack in electric vehicle |
| CN112133989A (en) * | 2020-08-24 | 2020-12-25 | 奇瑞商用车（安徽）有限公司 | Battery thermal management structure and management method |
| CN112366416A (en) * | 2020-11-10 | 2021-02-12 | 山东博胜动力科技股份有限公司 | LFP lithium battery |
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