CN111490312A - Integrated radiator based on diffusion welding technology for power battery pack - Google Patents
Integrated radiator based on diffusion welding technology for power battery pack Download PDFInfo
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- CN111490312A CN111490312A CN202010593774.5A CN202010593774A CN111490312A CN 111490312 A CN111490312 A CN 111490312A CN 202010593774 A CN202010593774 A CN 202010593774A CN 111490312 A CN111490312 A CN 111490312A
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- radiator
- cooling
- header
- mounting seat
- battery mounting
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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
- 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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses an integrated radiator based on a diffusion welding technology for a power battery pack, which comprises a radiator inlet header, a radiator main body and a radiator outlet header; the radiator inlet header, the radiator main body and the radiator outlet header are sequentially connected from top to bottom in a diffusion welding mode to form an integrated radiating structure; a plurality of battery mounting seat holes are uniformly formed in the integrated heat dissipation structure, and cooling channels are formed in the periphery and the bottom of each battery mounting seat hole; and the cooling working medium enters the cooling channels around the battery mounting seat hole through the radiator inlet, then enters the bottom of the battery mounting seat hole, and finally flows out from the radiator outlet. The integrated radiator is an integrated heat exchange structure based on the diffusion welding technology, and the heat dissipation capacity and the heat exchange uniformity are superior to those of the conventional power battery cooling system.
Description
Technical Field
The invention relates to the technical field of power battery heat dissipation, in particular to an integrated heat radiator for a power battery pack based on a diffusion welding technology and application of the integrated heat radiator in a power battery heat management system.
Background
With the rapid increase of the production and sales of the traditional fuel oil automobile, the energy and environmental problems caused by the rapid increase are increasingly highlighted. In recent years, new energy vehicles, such as electric vehicles, are favored by the global automobile market, and the dependence on conventional fuel vehicles is expected to be reduced. The lithium battery has the characteristics of long service life, high energy density, low maintenance cost and the like, and is the first choice as a power battery of a new energy automobile. In practical use, the working temperature of the conventional lithium battery is generally-20-60 ℃, if the battery pack cannot dissipate heat in time, the temperature of the battery pack is too high or the battery pack is not uniformly distributed, the charge-discharge cycle efficiency of the battery is reduced, the power and energy output of the battery are influenced, thermal runaway is caused in serious conditions, and the safety and reliability of the battery pack system are influenced. To address this problem, power battery pack thermal management systems typically need to be specially constructed to regulate their temperatures. The heat radiator is used as a core component of the battery thermal management system, and the performance of the heat radiator directly influences the overall performance of the whole thermal management system. Through the efficient and compact radiator structural design, a battery pack thermal management system can be effectively constructed, and the performance and the service life of the battery pack are improved.
In view of the influence of the working temperature on the efficiency, the service life and the like of the power battery of the automobile, a special power battery pack thermal management system is generally needed to regulate the temperature of the power battery pack so as to ensure that the power battery pack always works in a reasonable temperature range. The heat sink, which is a core component of the thermal management system, determines the overall performance of the system. By adopting the high-efficiency compact radiator structural design, on one hand, the temperature of the power battery pack can be effectively controlled, the running and safety problems caused by overhigh temperature are solved, on the other hand, the use space is not excessively occupied, and the economical efficiency of the system is improved. At present, the lithium battery pack heat dissipation mode mainly comprises three modes of air cooling, liquid cooling and phase change material cooling. Because phase change material cooling is expensive, air and liquid cooling are mainly used in commercial applications. In comparison, the liquid cooling mode has larger heat exchange coefficient and specific heat capacity, and the cooling effect is optimal. In the liquid cooling technology, a liquid cooling plate is usually arranged at the bottom of a lithium battery pack, heat release of the battery is brought out through the circulating flow of a cooling working medium in a cooling channel arranged in the cooling plate, and the heat dissipation mode has the problems of large thermal resistance, large working medium flow resistance, uneven flow distribution and uneven heat dissipation.
Disclosure of Invention
In order to solve the technical problem of the existing liquid cooling technology, the invention provides an integrated radiator for a power battery pack based on a diffusion welding technology. The integrated radiator is an integrated heat exchange structure based on the diffusion welding technology, and the heat dissipation capacity and the heat exchange uniformity are superior to those of the conventional power battery cooling system.
The invention is realized by the following technical scheme:
an integrated radiator based on diffusion welding technology for a power battery pack is composed of a radiator inlet header, a radiator main body and a radiator outlet header;
the radiator inlet header, the radiator main body and the radiator outlet header are sequentially connected from top to bottom in a diffusion welding mode to form an integrated radiating structure;
a plurality of battery mounting seat holes are uniformly formed in the integrated heat dissipation structure, and cooling channels are formed in the periphery and the bottom of each battery mounting seat hole;
and the cooling working medium enters the inlet header through the inlet of the radiator, is distributed to the cooling channels around the battery mounting seat hole, then is collected in the outlet header at the bottom of the battery mounting seat hole, and finally flows out from the outlet of the radiator.
The integrated radiator is constructed based on the diffusion welding technology, the cooling channels are uniformly arranged in the integrated radiator, the whole radiator is equivalent to a homothermal block with the internal cooling channels, and all batteries are arranged in the radiator, so that the battery pack can be well cooled, and the whole battery pack is ensured to be in a thermal environment with proper and uniform temperature.
Preferably, a plurality of hole platforms are uniformly arranged between the top surface and the bottom surface of the radiator inlet header;
battery mounting holes which are in one-to-one correspondence with the hole platforms are formed between the top surface and the bottom surface of the radiator main body;
the top surface of the outlet header of the radiator is used as the bottom surface of the hole of the battery mounting seat;
a battery mounting seat hole with a closed bottom is formed by a hole platform on a radiator inlet header, a corresponding battery mounting hole on a radiator main body and a position of the top surface of a radiator outlet header corresponding to the bottom surface of the battery mounting seat hole and is used for placing a power battery.
Preferably, the integrated radiator is provided with a plurality of cooling channel inlets which are uniformly distributed on the periphery of each hole platform and the bottom surface of the radiator inlet header and communicated with a cooling channel (4.1) of the radiator main body (4);
cooling channels which are in one-to-one correspondence with the inlets of the plurality of cooling channels are arranged between the top surface and the bottom surface of the radiator main body, and the cooling channels are used as cooling channels around the battery mounting seat hole;
the top surface of the radiator outlet header is provided with cooling channel outlets which are in one-to-one correspondence with the plurality of cooling channels and communicated with the radiator outlets.
Preferably, the inlet of the radiator is arranged on the side surface of the inlet header of the radiator, and the outlet of the radiator is arranged on the side surface of the outlet header of the radiator;
and cooling working media enter the radiator inlet header through the radiator inlet, flow into the inlets of the cooling channels in a shunting manner, flow through the cooling channels, finally flow into the inner cavity of the radiator outlet header through the outlets of the cooling channels, and flow out from the radiator outlet.
Preferably, each component of the integrated radiator is made of copper, copper alloy, aluminum or aluminum alloy.
On the other hand, the invention also provides a power battery pack thermal management system which adopts the integrated radiator.
The invention has the following advantages and beneficial effects:
1. compared with the existing cooling structure, the integrated radiator is constructed based on the diffusion welding technology, the cooling channel is arranged inside the radiator, the radiator is made of materials with good heat conductivity (such as copper, copper alloy, aluminum or aluminum alloy), the whole radiator is equivalent to a heat equalizing block with an internal cooling channel, all batteries are placed inside the radiator, and only the electrical connection part is exposed outside, so that the battery pack can be well cooled, and the whole battery pack is ensured to be in a thermal environment with appropriate and uniform temperature. The design of the integral type based on diffusion welding can effectively avoid revealing of coolant liquid, and the whole radiator has better operation safety and reliability.
2. Compared with the design of cooling only at the bottom of the battery, the current design has the advantages of large heat exchange area, high cooling efficiency and better and uniform cooling effect.
3. According to the invention, the lithium batteries are fixed in the radiator with good soaking property, all the batteries are almost covered by the radiating surface, and the cooling channels are uniformly distributed among the batteries, so that the heat generated in the charging and discharging processes of the batteries can be taken out in time; meanwhile, by changing the diameter of the pore channels, the positions and the number of the pore channels and the like, corresponding heat dissipation capacity adjustment can be performed on areas with different heat release strengths, so that the whole battery pack is kept under a relatively constant and uniform temperature condition, the local overheating phenomenon of the battery is avoided, and the safety of the system is improved. In addition, the design of the integrated heat exchanger can effectively avoid the leakage of the cooling working medium in the use process, and the system safety is greatly improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic view of an integrated heat sink according to the present invention.
Fig. 2 is a schematic view of the inlet header structure of the radiator of the present invention.
Fig. 3 is a schematic view of the main body structure of the heat sink of the present invention.
Fig. 4 is a schematic view of the outlet header structure of the radiator of the present invention.
Fig. 5 is a schematic diagram of the operation of the heat sink of the present invention.
Detailed Description
Hereinafter, the term "comprising" or "may include" used in various embodiments of the present invention indicates the presence of the invented function, operation or element, and does not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The present embodiments propose an integrated heat sink for a power battery pack.
As shown in fig. 1, the integrated radiator of the present embodiment is composed of a radiator inlet header 1, a radiator main body 4, and a radiator outlet header 5.
The radiator inlet header 1, the radiator main body 4 and the radiator outlet header 5 of the present embodiment are sequentially connected from top to bottom by a diffusion welding method 7 to form an integrated heat dissipation structure;
a plurality of battery mounting seat holes 2 are uniformly formed in the integrated heat dissipation structure, and cooling channels are formed around and at the bottom of each battery mounting seat hole 2;
in this embodiment, the cooling medium enters the cooling channel around the battery mounting seat hole 2 through the radiator inlet 3, then enters the bottom of the battery mounting seat hole, and finally flows out from the radiator outlet 6.
The radiator inlet and outlet header and the radiator main body of the embodiment are connected in a diffusion welding mode 7 to form an integrated radiator, so that the sealing performance can be effectively guaranteed, and the problems of short circuit and the like caused by leakage of cooling liquid are avoided. The side surface and the bottom of the battery are respectively in direct contact with the side surface and the bottom of the power battery hole seat, the heat released by the battery is transferred to the radiator main body in a heat conduction mode, then the liquid working medium flowing in the cooling channel carries out the heat release in a convection mode, and finally the heat release is radiated to the environment through external cooling equipment, so that the transmission process of the heat released by the battery to the outside is completed.
Each part of the integrated radiator of the embodiment is made of metal (such as copper or aluminum) or alloy material with better heat conductivity, and the radiator has better temperature uniformity due to the good heat conductivity.
Example 2
This embodiment further optimizes the radiator inlet header 1, radiator body 4 and radiator outlet header 5 of embodiment 1 described above.
The radiator inlet header 1 of the present embodiment mainly functions to distribute fluid to each cooling passage in addition to the cooling function, and the radiator main body is responsible for the main cooling function; in the radiator outlet header 5 of the present embodiment, all cooling medium needs to be collected therein, except for the cooling of the bottom of the battery, and flows out of the radiator.
As shown in fig. 2-4, a plurality of hole platforms 1.1 are uniformly arranged between the top surface and the bottom surface of the inlet header of the radiator of the embodiment;
battery mounting holes 4.2 corresponding to the hole platforms one to one are formed between the top surface and the bottom surface of the radiator main body in the embodiment;
the top surface of the radiator outlet header of the present embodiment also serves as the bottom surface of the battery mount hole (the dotted circle portion of fig. 4);
in the embodiment, a battery mounting seat hole with a closed bottom is formed by the hole platform 1.1 on the radiator inlet header, the corresponding battery mounting hole 4.2 on the radiator main body and the corresponding seat hole bottom surface on the radiator outlet header and is used for placing a power battery.
As shown in fig. 2-4, the integrated radiator of this embodiment has a plurality of cooling channel inlets 1.2 uniformly arranged around each first receiving through hole and on the bottom surface of the radiator inlet header, and communicated with the radiator inlet 3;
cooling channels 4.1 which are in one-to-one correspondence with inlets of the plurality of cooling channels are arranged between the top surface and the bottom surface of the radiator main body of the embodiment and are used as cooling channels around the battery mounting seat hole;
the top surface of the radiator outlet header of the present embodiment is provided with cooling channel outlets 5.2 in one-to-one correspondence with the plurality of cooling channels, which communicate with the radiator outlet 6.
The radiator inlet 3 of the present embodiment is provided at the side of the radiator inlet header 1.
The radiator outlet 6 of the present embodiment is provided on the side of the radiator outlet header 5.
As shown in fig. 5, the cooling working medium enters the radiator inlet header 1 through the radiator inlet 3, flows into each cooling channel inlet 1.2 in a split manner, flows through the cooling channel 4.1, and finally is collected into the radiator outlet header inner cavity 5.1 through the cooling channel outlet 5.2 and flows out through the radiator outlet 6.
The present embodiment may also be modified from the above scheme by any of the following means:
(1) the number, size, shape, etc. of the battery mounting bosses and the cooling passages are changed.
(2) The structure and the size of the inlet and outlet header are changed.
(3) The heat sink structure materials with different heat conduction properties are adopted.
The embodiment can also change the flow distribution of the cooling working medium by changing the diameter, the position, the number and other modes of the cooling channels in the radiator, further control the heat dissipation process, realize the refined heat dissipation of the area which can not release the heat intensity, further improve the temperature distribution uniformity in the battery pack and the radiator, and be more beneficial to the battery to exert the working efficiency.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The integrated radiator for the power battery pack based on the diffusion welding technology is characterized by comprising a radiator inlet header (1), a radiator main body (4) and a radiator outlet header (5);
the radiator inlet header (1), the radiator main body (4) and the radiator outlet header (5) are sequentially connected from top to bottom in a diffusion welding mode to form an integrated radiating structure;
a plurality of battery mounting seat holes (2) are uniformly formed in the integrated heat dissipation structure, and cooling channels are formed in the periphery and the bottom of each battery mounting seat hole (2);
the cooling working medium enters the inlet header (1) through the radiator inlet (3), then is distributed to the cooling channels around the battery mounting seat hole (2), enters the outlet header (5) at the bottom of the battery mounting seat hole (2) after flowing out, and finally flows out through the radiator outlet (6).
2. The one-piece heat sink for a power battery pack based on diffusion welding technology as claimed in claim 1,
a plurality of hole platforms (1.1) are uniformly arranged between the top surface and the bottom surface of the radiator inlet header (1);
battery mounting holes (4.2) which are in one-to-one correspondence with the hole platforms (1) are formed between the top surface and the bottom surface of the radiator main body (4);
the top surface of the radiator outlet header (5) is used as the bottom surface of a battery mounting seat hole;
a battery placing seat hole with a sealed bottom is formed by a hole platform (1.1) on a radiator inlet header (1), a corresponding battery mounting hole (4.2) on a radiator main body (4) and a corresponding battery mounting seat hole bottom position on a radiator outlet header (5) and is used for placing a power battery.
3. The integrated radiator based on the diffusion welding technology for the power battery pack is characterized in that a plurality of uniformly arranged cooling channel inlets (1.2) are arranged on the bottom surface of the radiator inlet header (1) at the periphery of each hole platform (1.1) and communicated with the cooling channels (4.1) of the radiator main body (4);
cooling channels (4.1) which are in one-to-one correspondence with the inlets (1.2) of the plurality of cooling channels are arranged between the top surface and the bottom surface of the radiator main body (4), and the cooling channels (4.1) are used as cooling channels around the battery mounting seat hole;
the top surface of radiator outlet header (5) is provided with cooling channel export (5.2) with a plurality of cooling channel one-to-one, cooling channel export (5.2) and radiator export (6) intercommunication.
4. The one-piece heat sink based on diffusion welding technology for a power battery pack according to claim 3, characterized in that the heat sink inlet (3) is arranged at the side of the heat sink inlet header (1), and the heat sink outlet (6) is arranged at the side of the heat sink outlet header (5);
the cooling working medium enters the radiator inlet header (1) through the radiator inlet (3), then flows through the cooling channel inlets, enters the cooling channels, finally is converged to the radiator outlet header through the cooling channel outlets, and finally flows out through the radiator outlet (6).
5. The one-piece heat sink for a power battery pack based on the diffusion welding technology as claimed in any one of claims 1 to 4, wherein each component of the one-piece heat sink is made of copper, copper alloy, aluminum or aluminum alloy.
6. A power battery pack thermal management system, characterized in that it employs an integrated heat sink according to any one of claims 1-5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010593774.5A CN111490312B (en) | 2020-06-28 | 2020-06-28 | Integrated radiator based on diffusion welding technology for power battery pack |
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| CN202010593774.5A CN111490312B (en) | 2020-06-28 | 2020-06-28 | Integrated radiator based on diffusion welding technology for power battery pack |
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| CN114421047A (en) * | 2021-11-23 | 2022-04-29 | 中国船舶重工集团公司第七〇五研究所 | Battery pack and cooling device for UUV |
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| CN111490312B (en) | 2020-09-29 |
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