CN114552058A - Battery pack, method for determining thickness of heat-conducting glue of battery pack, method for optimizing thickness of heat-conducting glue of battery pack and power automobile - Google Patents
Battery pack, method for determining thickness of heat-conducting glue of battery pack, method for optimizing thickness of heat-conducting glue of battery pack and power automobile Download PDFInfo
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- CN114552058A CN114552058A CN202210038441.5A CN202210038441A CN114552058A CN 114552058 A CN114552058 A CN 114552058A CN 202210038441 A CN202210038441 A CN 202210038441A CN 114552058 A CN114552058 A CN 114552058A
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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
- H01M10/62—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
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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
- H01M10/651—Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
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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
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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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Abstract
The application discloses a battery pack, which comprises a first battery module, a first liquid cooling plate and first heat-conducting glue, wherein the first liquid cooling plate is used for cooling the first battery module, and is provided with a water inlet for flowing cooling liquid; the second battery module, a second liquid cooling plate and a second heat-conducting adhesive are used for cooling the second battery module, wherein the second liquid cooling plate is connected with the first liquid cooling plate in series, and the second liquid cooling plate is provided with a water outlet for flowing out cooling liquid; the thickness of the first heat-conducting glue is thicker than that of the second heat-conducting glue, and the thickness difference of the first heat-conducting glue and the second heat-conducting glue is within a threshold temperature difference range. The technical scheme of this application can reduce the difference in temperature between first battery module and the second battery module to reduce the difference in temperature of battery package, be favorable to promoting the life and the charge-discharge performance of battery package.
Description
Technical Field
The invention relates to the field of battery modules, in particular to a battery pack, a method for determining and optimizing thickness of heat-conducting glue of the battery pack and a power automobile.
Background
The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels to run by using a motor, and meets various requirements of road traffic and safety regulations. Because the influence on the environment is smaller than that of the traditional automobile, the prospect is widely seen. Under the influence of the driving habits of the traditional automobiles, the requirement for the long driving range of the electric automobile gradually becomes the mainstream trend, and the electric automobile provides kinetic energy through a Battery Pack (Battery Pack) arranged on the electric automobile. Usually, a plurality of battery modules connected in series or in parallel are disposed in the battery pack to obtain the required voltage and power.
In the battery pack, the batteries in the battery module are heated or cooled by the cooling liquid in the liquid cooling plate, so that the batteries are in an appropriate temperature range.
In the battery package scheme of present mainstream, each module is the same with the heat transfer ability between the liquid cooling board that corresponds, to the series flow channel, is close to the heat transfer effect that coolant liquid inlet side module heat transfer effect is obviously better than keeping away from the inlet side module, leads to inlet side module and outlet side battery module to form the difference in temperature, and too big difference in temperature can influence the charge-discharge performance of battery package, safety and life.
Therefore, a battery pack is needed to reduce the temperature difference between the modules in the battery pack.
Disclosure of Invention
The embodiment of the application provides a battery pack, a battery pack determining method, an optimizing method and a power automobile, and the temperature difference between modules in the battery pack can be reduced.
In a first aspect, a battery pack is provided, including: the first battery module, the first liquid cooling plate and the first heat-conducting glue are used for cooling the first battery module, the first heat-conducting glue is located between the first battery module and the first liquid cooling plate, and the first liquid cooling plate is provided with a water inlet for flowing cooling liquid; the second battery module, a second liquid cooling plate and a second heat-conducting adhesive are used for cooling the second battery module, the second heat-conducting adhesive is positioned between the second battery module and the second liquid cooling plate, the second liquid cooling plate and the first liquid cooling plate are connected in series, and the second liquid cooling plate is provided with a water outlet for flowing cooling liquid out; the thickness of the first heat-conducting glue is larger than that of the second heat-conducting glue, and the thickness difference of the first heat-conducting glue and the second heat-conducting glue is within a threshold range.
Optionally, the thickness of the second heat-conducting glue is not less than the sum of the flatness of the upper surface of the second liquid cooling plate and the flatness of the lower surface of the second battery module.
Optionally, the thickness difference is not greater than 0.3 times the thickness of the second thermally conductive paste. In a second aspect, a method for determining the thickness of a thermal conductive adhesive of a battery pack is provided, where the method is applied to the battery pack of any one of the first aspect, and the method includes: determining the minimum thickness of the first heat-conducting glue and the thickness of the second heat-conducting glue; setting the initial thickness D1(i) ═ D0(1+ i × n%) of the first heat-conducting glue, wherein D0 is the minimum thickness of the first heat-conducting glue, the value of i is a non-negative integer, and n is a non-negative constant; obtaining the temperature difference between the first battery module and the second battery module according to the thickness of the second heat-conducting glue and the initial thickness of the first heat-conducting glue; and when the temperature difference between the first battery module and the second battery module is not greater than the threshold temperature difference of the battery pack, determining the target thickness of the first heat-conducting glue, otherwise, accumulating the value of i by 1 until the temperature difference between the first battery module and the second battery module is not greater than the threshold temperature difference of the battery pack.
Optionally, the target thickness of the first heat conductive paste is not greater than 1.3 times the thickness of the second heat conductive paste.
Optionally, the determining a temperature difference between the first battery module and the second battery module according to the thickness of the second thermally conductive paste and the initial thickness of the first thermally conductive paste includes: inputting the thickness of the second heat-conducting glue and the initial thickness of the first heat-conducting glue into a computational fluid dynamics thermal simulation model of the battery pack to obtain the temperature difference between the first battery module and the second battery module.
Optionally, the determining the minimum thickness of the first heat conductive paste and the thickness of the second heat conductive paste includes: and determining the minimum thickness of the first heat-conducting glue according to the flatness of the upper surface of the first liquid cooling plate and the flatness of the lower surface of the first battery module, wherein D0 is > | H1| + | H2|, H1 is the flatness of the upper surface of the first liquid cooling plate, and H2 is the flatness of the lower surface of the first battery module.
Optionally, the thickness of the second heat conductive glue is greater than or equal to the minimum thickness of the first heat conductive glue.
Optionally, the value of n is 5.
In a third aspect, a battery pack optimization method is provided, and is characterized by including: the battery pack is optimized according to the target thickness of the first thermally conductive paste and the thickness of the second thermally conductive paste determined by the method of the second aspect.
In a fourth aspect, a power automobile is provided, and is characterized in that the power automobile comprises the battery pack according to the first aspect.
In a fifth aspect, an electronic device is provided, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the second or third aspect.
A sixth aspect provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method according to the second or third aspect.
In the battery pack provided by the embodiment of the invention, the second liquid cooling plate and the first liquid cooling plate are used in series, wherein the thickness of the first heat-conducting glue is larger than that of the second heat-conducting glue, and the thickness difference between the first heat-conducting glue and the second heat-conducting glue is within a threshold range. The technical scheme of this application can reduce the difference in temperature between first battery module and the second battery module to reduce the difference in temperature of battery package, be favorable to promoting the life and the charge-discharge performance of battery package.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention. In the drawings:
fig. 1 shows a schematic configuration diagram of a battery pack according to an embodiment of the present application.
Fig. 2 shows a flow chart of a method for determining the thickness of a thermal conductive paste of a battery pack according to an embodiment of the present application.
FIG. 3 shows a cell temperature differential profile for one embodiment of the present application.
FIG. 4 shows a schematic block diagram of an electronic device of an embodiment of the application.
Detailed Description
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 some, not all, embodiments of the present invention. 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.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of a battery pack according to an embodiment of the present application. As shown in fig. 1, a battery includes a first battery module, a first liquid cooling plate for cooling the first battery module, and a first heat-conducting adhesive, where the first heat-conducting adhesive is located between the first battery module and the first liquid cooling plate, and the first liquid cooling plate is provided with a water inlet for flowing cooling liquid; the second battery module, be used for carrying out refrigerated second liquid cooling board and second heat conduction to the second battery module and glue, the second heat conduction glue is located the second battery module in between the second liquid cooling board, wherein, the second liquid cooling board with first liquid cooling board is established ties, the second liquid cooling board is provided with the delivery port that is used for flowing out the coolant liquid.
When the two liquid cooling plate cooling channels are connected in series, the schematic diagram of the cooling loop is shown in fig. 1, cooling liquid flows in the liquid cooling plates along the arrow direction of the solid line, external cooling liquid sequentially enters the first liquid cooling plate channel and the second liquid cooling plate channel from the water inlet, and then flows out of the water outlet and returns to the external cooling system to form a cooling cycle. The thickness of the first heat-conducting glue is larger than that of the second heat-conducting glue, and the thickness difference of the first heat-conducting glue and the second heat-conducting glue is within a threshold temperature difference range.
Specifically, the threshold range of the thickness difference between the first heat conductive paste and the second heat conductive paste may be a preset value, for example, 0.5mm may be set, and for example, the thickness difference between the first heat conductive paste and the second heat conductive paste does not exceed 30% of the thickness of the second heat conductive paste.
It should be understood that the first and second modules in the present application do not refer to a front-back sequence, but only to distinguish different main bodies, the first battery module in the present application refers to a battery module near the water inlet, for example, the battery module may be one of two modules where the corresponding liquid cooling plate is near the water inlet, and the second battery module refers to a battery module far from the water inlet; the thermal conductivity of the heat-conducting glue in the application is not limited in the application.
Optionally, in this application, the first thermal conductive adhesive is different from the second thermal conductive adhesive in thickness, the first thermal conductive adhesive is thicker than the second thermal conductive adhesive, and the thicknesses of the first thermal conductive adhesive and the second thermal conductive adhesive can be determined through a battery pack Computational Fluid Dynamics (CFD) thermal simulation analysis.
It should be understood that, in the present application, the first liquid cooling plate upper surface refers to a side close to the first battery module, and the lower surface of the first battery module refers to a side close to the first liquid cooling plate.
Optionally, the thickness of the second heat-conducting glue is not less than the sum of the flatness of the upper surface of the second liquid cooling plate and the flatness of the lower surface of the second battery module.
Specifically, the thickness D2 of the second heat-conducting glue is more than or equal to D0, wherein D0 is the minimum thickness of the heat-conducting glue of the battery pack, and D0 is determined by the flatness H1 of the upper surface of the first liquid cooling plate and the flatness H2 of the lower surface of the first battery module.
Specifically, the minimum thickness D0 of the heat conducting adhesive corresponding to a single battery module is determined according to the flatness H1 of the upper surface of the first liquid cooling plate and the flatness H2 of the lower surface of the first battery module, and the thickness is used as the thickness of the heat conducting adhesive corresponding to the second battery module, specifically, D0 > | H1| + | H2|, for example, H1 is 0.5mm, H2 is 0.2mm, and then D0 is greater than 0.7mm, it should be understood that specific values of D0, in addition to satisfying the above conditions, may also be determined according to specific empirical values of those skilled in the art, and the application is not limited.
The initial thickness D1(i) ═ D0(1+ i × n%), wherein i is a non-negative integer, n is a non-negative constant, Δ T (i) is the temperature difference between the first battery module and the second battery module, Δ T0 is the threshold temperature difference of the battery pack, Δ T (i) is determined by a computational fluid dynamics CFD thermal simulation model of the battery pack under conditions D1(i) and D2, when Δ T (i) ≦ Δ T0, the target thickness of the first heat-conductive paste is determined to be D1(i), otherwise, the value of i is added up by 1 until the temperature difference between the first battery module and the second battery module is less than or equal to Δ T0.
Specifically, a battery pack CFD thermal simulation analysis model is established, the thickness of the second heat-conducting glue is set to be D2, the initial thickness D1(i) ═ D0(1+ i × n%) of the first heat-conducting glue, and the temperature difference delta T (i) between the first battery module and the second battery module is obtained through CFD thermal simulation; the thickness of the first heat-conducting glue is sequentially increased by n percent (n is more than 0) of D0, and n is preferably 5; when i is 2, 3, 4 and …, the temperature difference Δ T2, Δ T3, Δ T4 and … between the first battery module and the second battery module are obtained in sequence through CFD simulation, and when the value of i is such that the temperature difference between the first battery module and the second battery module is improved to the best, that is, the temperature difference between the batteries in the battery pack is less than or equal to the design target temperature difference Δ T (that is, when the threshold temperature difference Δ T0 is mentioned above), the thickness is taken as the target thickness of the first heat-conducting glue.
Generally, D1 cannot be too large, and the recommended value should satisfy the following condition: d1(i) ≦ 1.3D2, that is, D0(1+ i × n%) ≦ 1.3D2, or alternatively, the difference in thickness between D1 and D2 is not more than 0.3 times the thickness of the second thermally conductive paste.
In the battery pack provided by the embodiment of the invention, the second liquid cooling plate and the first liquid cooling plate are used in series, wherein the thickness of the first heat-conducting glue is greater than that of the second heat-conducting glue, and the thickness difference between the first heat-conducting glue and the second heat-conducting glue is within the threshold range.
Fig. 2 is a flowchart illustrating a battery pack determination method according to an embodiment of the present application, and as shown in fig. 2, the method includes the following specific steps:
in step 310, the minimum thickness D0 of the first heat-conducting glue and the thickness D2 of the second heat-conducting glue are determined.
In step 310, as described above, the minimum thickness D0 of the first thermally conductive adhesive is determined according to the flatness H1 of the upper surface of the first liquid cooling plate and the flatness H2 of the lower surface of the first battery module, where D0 > | H1| + | H2 |.
In particular, the threshold temperature difference Δ T0 may be 3-8 ℃, optionally 5 ℃.
Alternatively, D1(i) ≦ 1.3D 2.
Optionally, determining the temperature difference Δ t (i) between the first battery module and the second battery module according to the thickness D2 of the second thermally conductive paste and the thickness of the first thermally conductive paste, including: inputting the thickness D2 of the second heat-conductive glue and the initial thickness D1(i) of the first heat-conductive glue into a Computational Fluid Dynamics (CFD) thermal simulation model of the battery pack, and obtaining a temperature difference Δ t (i) between the first battery module and the second battery module.
It should be understood that, besides the determination of the temperature difference Δ t (i) between the first battery module and the second battery module by using the CFD thermal simulation model, the temperature difference Δ t (i) may be determined by using a table look-up or other manners, which is not limited in this application.
Optionally, the determining the minimum thickness D0 of the first heat conductive glue and the thickness D2 of the second heat conductive glue comprises: and determining the minimum thickness D0 of the first heat-conducting glue according to the flatness H1 of the upper surface of the first liquid cooling plate and the flatness H2 of the lower surface of the first battery module, wherein D0 is greater than | H1| + | H2 |.
Optionally, the thickness D2 of the second heat-conducting glue is larger than or equal to D0.
Specifically, in step 320, the determining process may be that, first, a CFD thermal simulation analysis model of the battery pack is established, an initial value of the thickness of the second heat-conducting adhesive is set as D2, the thickness D1(i) of the first heat-conducting adhesive is D0(1+ i × n%), and a temperature difference Δ t (i) between the first battery module and the second battery module is obtained through CFD thermal simulation; the thickness of the first heat-conducting glue is sequentially increased by n percent (n is more than 0) of D0, and n is preferably 5; when i is 2, 3, 4 and …, the temperature difference Δ T2, Δ T3, Δ T4 and … between the first battery module and the second battery module are obtained in sequence through CFD simulation, and when the value of i is such that the temperature difference between the first battery module and the second battery module is improved to the best, that is, the temperature difference between the batteries in the battery pack is less than or equal to the design target temperature difference Δ T (that is, when the threshold temperature difference Δ T0 is mentioned above), the thickness is taken as the target thickness of the first heat-conducting glue.
Optionally, as an embodiment of the present application, the battery pack determining method is applied to a battery pack design of an electric vehicle, and it should be understood that the battery pack determining method described in the present application may also be applied to other fields, and the present application is not limited thereto.
Fig. 3 shows a battery temperature difference distribution diagram according to an embodiment of the present application, as shown in fig. 3, a dotted line is a battery temperature distribution diagram according to a conventional scheme, a solid line is a battery temperature distribution diagram according to a scheme provided by the embodiment of the present application, Δ T1 is a temperature difference of a battery pack in an original technical scheme, and Δ T2 is a temperature difference of a battery pack in the technical scheme, so that an improvement effect is significant.
In one embodiment, there is also provided a battery pack optimizing method, as shown in fig. 3, including step 350 of optimizing the battery pack according to the target thickness D1(i) of the first heat conductive paste and the thickness D2 of the second heat conductive paste determined in steps 310 to 340.
This application embodiment can reduce the difference in temperature between the module through the thickness that the gluey thickness of the first heat conduction of reasonable certainty and second heat conduction are glued, from this, and the temperature difference is less in the battery package that obtains through the gluey first heat conduction of corresponding thickness, second heat conduction, is favorable to promoting the life and the charge-discharge performance of battery package, realizes the optimization to the battery package.
In one embodiment, a power automobile is also provided, and the power automobile comprises the battery pack as described in the embodiment of fig. 1.
Fig. 4 is a block diagram of an electronic device according to an embodiment of the present invention, where the electronic device 500 shown in fig. 4 includes a memory 520 and a processor 510 electrically connected to the memory 520, the memory 520 stores a computer program that can be executed by the processor 510, and when the computer program is executed by the processor, the computer program implements each process of any one of the method embodiments, and can achieve the same technical effect, and therefore, in order to avoid repetition, details are not repeated here.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the method embodiments, and can achieve the same technical effects, and in order to avoid repetition, the details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A battery pack, comprising:
the first battery module, the first liquid cooling plate and the first heat-conducting glue are used for cooling the first battery module, the first heat-conducting glue is located between the first battery module and the first liquid cooling plate, and the first liquid cooling plate is provided with a water inlet for flowing cooling liquid;
the second battery module, a second liquid cooling plate and a second heat-conducting adhesive are used for cooling the second battery module, and the second heat-conducting adhesive is located between the second battery module and the second liquid cooling plate, wherein the second liquid cooling plate is connected with the first liquid cooling plate in series, and the second liquid cooling plate is provided with a water outlet for flowing out cooling liquid;
the thickness of the first heat-conducting glue is larger than that of the second heat-conducting glue, and the thickness difference of the first heat-conducting glue and the second heat-conducting glue is within a threshold range.
2. The battery pack according to claim 1, wherein the thickness of the second thermally conductive paste is not less than the sum of the flatness of the upper surface of the second liquid cooling plate and the flatness of the lower surface of the second battery module.
3. The battery pack according to claim 1 or 2, wherein the thickness difference is not more than 0.3 times the thickness of the second thermally conductive paste.
4. A method for determining the thickness of a thermal conductive adhesive of a battery pack, which is applied to the battery pack according to any one of claims 1 to 3, the method comprising:
determining the minimum thickness of the first heat-conducting glue and the thickness of the second heat-conducting glue;
setting the initial thickness D1(i) ═ D0(1+ i × n%) of the first heat-conducting glue, wherein D0 is the minimum thickness of the first heat-conducting glue, the value of i is a non-negative integer, and n is a non-negative constant;
obtaining the temperature difference between the first battery module and the second battery module according to the thickness of the second heat-conducting glue and the initial thickness of the first heat-conducting glue;
and when the temperature difference between the first battery module and the second battery module is not greater than the threshold temperature difference of the battery pack, determining the target thickness of the first heat-conducting glue, otherwise, accumulating the value of i by 1 until the temperature difference between the first battery module and the second battery module is not greater than the threshold temperature difference of the battery pack.
5. The method of claim 4, wherein the target thickness of the first thermally conductive paste is no greater than 1.3 times the thickness of the second thermally conductive paste.
6. The method of claim 5, wherein the determining the temperature difference between the first battery module and the second battery module according to the thickness of the second thermally conductive paste and the initial thickness of the first thermally conductive paste comprises:
inputting the thickness of the second heat-conducting glue and the initial thickness of the first heat-conducting glue into a computational fluid dynamics thermal simulation model of the battery pack to obtain the temperature difference between the first battery module and the second battery module.
7. The method of claim 6, wherein determining the minimum thickness of the first thermally conductive paste and the thickness of the second thermally conductive paste comprises:
and determining the minimum thickness of the first heat-conducting glue according to the flatness of the upper surface of the first liquid cooling plate and the flatness of the lower surface of the first battery module, wherein D0 is > | H1| + | H2|, H1 is the flatness of the upper surface of the first liquid cooling plate, and H2 is the flatness of the lower surface of the first battery module.
8. The method of claim 7, wherein the thickness of the second thermally conductive paste is greater than or equal to the minimum thickness of the first thermally conductive paste.
9. A method for optimizing a battery pack, comprising:
the target thickness of the first thermally conductive paste and the thickness of the second thermally conductive paste determined according to the method of any one of claims 4 to 8 optimize the battery pack.
10. A power automobile characterized in that the power automobile includes the battery pack according to any one of claims 1 to 3.
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| CN202210038441.5A CN114552058A (en) | 2022-01-13 | 2022-01-13 | Battery pack, method for determining thickness of heat-conducting glue of battery pack, method for optimizing thickness of heat-conducting glue of battery pack and power automobile |
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| CN202210038441.5A CN114552058A (en) | 2022-01-13 | 2022-01-13 | Battery pack, method for determining thickness of heat-conducting glue of battery pack, method for optimizing thickness of heat-conducting glue of battery pack and power automobile |
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| CN210805957U (en) * | 2019-11-05 | 2020-06-19 | 东风汽车有限公司 | Battery module liquid cooling board and liquid cooling battery package |
| CN214505645U (en) * | 2021-03-29 | 2021-10-26 | 蜂巢能源科技有限公司 | Cooling plates for battery packs, battery packs and vehicles |
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|---|---|---|---|---|
| CN109962317A (en) * | 2019-03-27 | 2019-07-02 | 山东大学 | An electric vehicle battery module thermal management and energy recovery system and method |
| CN210805957U (en) * | 2019-11-05 | 2020-06-19 | 东风汽车有限公司 | Battery module liquid cooling board and liquid cooling battery package |
| CN214505645U (en) * | 2021-03-29 | 2021-10-26 | 蜂巢能源科技有限公司 | Cooling plates for battery packs, battery packs and vehicles |
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Application publication date: 20220527 |