CN110880631A - Be applied to curved type variable structure cooling plate of power battery module - Google Patents
Be applied to curved type variable structure cooling plate of power battery module Download PDFInfo
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- CN110880631A CN110880631A CN201911343776.2A CN201911343776A CN110880631A CN 110880631 A CN110880631 A CN 110880631A CN 201911343776 A CN201911343776 A CN 201911343776A CN 110880631 A CN110880631 A CN 110880631A
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- cooling plate
- battery module
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- power battery
- cooling
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a curved variable-structure cooling plate applied to a power battery module, which comprises two parallel runners, wherein the runners are continuous curved runners, and the cross section area of the runners is changed in a non-equal gradual manner along the flowing direction of heat-conducting liquid in the runners; meanwhile, outer end flow guide ports for inputting and outputting heat conducting liquid are respectively arranged at two ends of the cooling plate corresponding to the flow channel; the invention also discloses a power battery module with the liquid cooling assembly, which comprises battery monomers, insulating heat-conducting fins, a cooling plate, a busbar and a battery mounting plate, wherein the battery monomers are arranged in parallel and are provided with certain intervals, the busbar is buckled at the position of a lug, the outer side of the busbar is limited and fixed by the battery mounting plate, and the insulating heat-conducting fins and the cooling plate are sequentially arranged at the two sides. The invention can control the temperature of the battery within a reasonable range and further reduce the temperature difference in the battery module.
Description
Technical Field
The invention relates to the field of power battery heat dissipation, in particular to a curve type variable structure cooling plate with a pull-plug type structure and applied to a power battery module.
Background
The lithium ion battery has the advantages of high monomer voltage, large specific energy, large suitable working temperature range, long service life and the like, becomes a preferred clean energy source for replacing fossil fuels, and is widely applied to new energy electric automobiles as a power battery.
The power battery is the heart of the electric automobile, and the temperature rise and the temperature uniformity inside the battery module are important indexes for measuring the power supply performance, the safety performance and the stability performance of the battery. When the temperature is too high, the side reaction of the battery can be accelerated, the battery capacity, the working voltage and the charge-discharge efficiency can be attenuated, and even thermal runaway can occur in serious cases, so that safety accidents are caused; when the temperature is too low, the energy and the capacity released by the battery can be remarkably reduced, and even the irreversible capacity of the battery is reduced. For the electric automobile, each battery cell is connected in series or in parallel to form a group, and if the individual battery cell fails in advance, the performance of the whole battery pack is affected, and the electric automobile cannot run normally. Therefore, the reasonable and efficient thermal management system is utilized to control the temperature and the consistency of the battery within a reasonable range, the performance of the battery is improved, the service life of the battery is prolonged, and therefore the safe and reliable operation of the electric automobile is guaranteed.
At present, cooling methods of a power battery thermal management system can be classified into three major types, namely air cooling, liquid cooling and phase change cooling, according to different heat transfer media. The air cooling is difficult to meet the heat dissipation requirement under the high-load working condition of the battery due to the heat dissipation limitation of the air cooling; liquid cooling is widely applied by virtue of higher cooling efficiency and reliability; the phase-change material cooling can well maintain the temperature uniformity of the battery pack, the heat dissipation effect is good, but the phase-change material is high in requirement, expensive and greatly limited by materials and cost. Therefore, the adoption of the liquid cooling heat management structure for heat dissipation of the power battery is considered as the primary choice of the structural design of the whole vehicle heat management system.
The cooling plate flow channel design of the current power battery liquid cooling system mainly comprises a plurality of types such as curve type, straight channel, single-cavity structure and the like, and other flow channel types such as different cooling liquid inlet and outlet distribution positions, the number of branch flow channels, the number of cooling plate flow channels and the like are derived on the basis. Compared with a single-cavity structure, the curve asymmetric channel cooling plate has better structural integrity and support performance, can reduce the channel area and the using amount of cooling liquid compared with a straight channel, and has better temperature uniformity compared with the curve symmetric channel design, so that the curve asymmetric channel cooling plate can be used as an optimal scheme and the structure of the curve asymmetric channel cooling plate is optimized to obtain a better liquid cooling heat dissipation effect of the battery module.
Disclosure of Invention
The invention aims to provide a curve type variable structure cooling plate applied to a power battery module, which can improve the cooling effect of a liquid cooling system of the battery module according to the flow channel variable structure and flow channel asymmetric distribution design made according to the distribution rule of a battery temperature field on the basis of a traditional curve flow channel, further improve the consistency of the battery temperature, prolong the cycle life of a power battery and solve the problems of weaker temperature difference control capability and weak cooling effect on the power battery of the conventional battery cooling plate.
The technical problem solved by the invention is realized by adopting the following technical scheme:
a curve type variable structure cooling plate applied to a power battery module is arranged on two sides of the power battery module to carry out liquid cooling or heat conduction preheating on the power battery module, and comprises two runners which are arranged in parallel, wherein the runners are consistent in structure and size and are continuous curve structure runners, the cross-sectional area of each runner is changed in a non-equal gradual change mode along the flowing direction of heat conduction liquid in each runner, and the two runners are distributed on the upper portion and the lower portion of the central line of the cooling plate; and the two ends of the cooling plate corresponding to the flow passage are respectively provided with an outer end flow guide port for inputting and outputting heat-conducting liquid.
Structure more than adopting, when the whole cooling plate is flowed through to the runner of heat conduction liquid along runner cross-section gradual change, can improve the heat transfer ability decline of the cooling plate that heat conduction liquid temperature rise caused in the traditional curvilinear runner greatly, the not good condition of cooling effect of battery module can balance the heat transfer ability of each part of battery cooling plate better, reduces the difference in temperature between the battery monomer.
As a further limitation, the heat conducting liquid may be a heat conducting liquid subjected to preheating treatment, or may be a cold heat conducting liquid, that is, the cooling plate may be used for cooling and heat dissipation when the temperature of the battery is too high, or may be used for preheating when the temperature is too low.
As a further limitation, the flow channels are asymmetrically distributed to reduce the temperature difference between the single batteries and further improve the temperature uniformity of the battery module.
As a further limitation, the cross section of the flow passage is a rectangular cross section with a variable length-width ratio, and the rectangular cross section flow passage with the variable cross section can enable the heat exchange capacity of all parts of the cooling plate to be more uniform and the temperature difference to be smaller.
By further limiting, in the section with unequal-size gradual change of the flow channel, the gradual change value of the section of the flow channel at the central part of the battery is larger than the values at two ends, and the change form of the section fully considers the phenomenon that the central temperature is higher when the single battery releases heat, so that the change form of the section is more in line with the actual cooling requirement.
A power battery module with a liquid cooling assembly comprises a power battery module and a cooling assembly, wherein the power battery module comprises a plurality of battery monomers which are arranged in parallel, gaps are reserved among the battery monomers, the intervals between the battery monomers which are adjacent in position are equal, the battery monomers are packaged and fixed through a battery mounting plate, and the battery module is formed at the lug positions of the battery monomers in a serial or parallel mode through a bus bar; the cooling assembly is arranged on two sides of a battery mounting plate of the power battery module and comprises insulating heat-conducting fins and a curve type variable structure cooling plate with the structural characteristics, and the insulating heat-conducting fins are abutted against the inner side of the curve type variable structure cooling plate and attached to the side faces of two sides of the battery module.
As a further limitation, the battery monomer preferably adopts a square power lithium battery so as to facilitate the attaching degree of the insulating heat-conducting fins on the two sides of the battery, ensure good heat-conducting performance and simultaneously ensure the simplicity of installation.
As a further limitation, the cooling plate can be detachably replaced by plugging.
As further inject, be provided with on the battery mounting panel and connect fixed plug connecting piece to curved type variable structure cooling plate to can make things convenient for the replacement of inserting of cooling plate when realizing that battery module outer end is fixed.
Has the advantages that: the curve type variable structure cooling plate disclosed by the invention is novel in structure and ingenious in design, the structural design is carried out again on the basis of the original curve type flow channel, two curve asymmetric flow channels are arranged, the working temperature of a battery module can be stably controlled within 20-45 ℃ for a long time by the aid of the cooling plate structure, the temperature difference is stable between 2-3 ℃, the consistency of the cooling effect of a liquid cooling system of the battery module and the temperature of the battery is improved, the service life of a battery pack is prolonged, meanwhile, the heat dissipation of the battery module under a complex working condition and the preheating of the battery under a cold weather can be realized by means of replacement of heat conducting liquid, the number of parts of a new energy automobile is reduced, and the control logic is simplified.
Drawings
Fig. 1 is an assembly view of a power battery module with a liquid cooling assembly according to a preferred embodiment of the present invention.
Fig. 2 is an exploded view of the components of the preferred embodiment of fig. 1.
FIG. 3 is a schematic view of the centerline profile of the cooling plate flow channel in accordance with the preferred embodiment of the present invention.
FIG. 4 is a schematic cross-sectional view of the interior of a cooling plate according to a preferred embodiment of the present invention.
Wherein: 1. a first cooling plate; 2. a second cooling plate; 3. a first insulating thermally conductive sheet; 4. a second insulating heat-conducting sheet; 5. a battery mounting plate; 6. a bus bar; 7. a battery cell; 8. a flow guide port of the liquid inlet; 9. a liquid outlet diversion port.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described below by combining the specific drawings and the embodiments.
In the following examples, it will be understood by those skilled in the art that, 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 this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Referring to fig. 1 and fig. 2, in an embodiment of a power battery module with a liquid cooling assembly, in this embodiment, the power battery module includes five battery cells 7, a first insulating heat-conducting fin 3, a second insulating heat-conducting fin 4, a first cooling plate 1, a second cooling plate 2, a bus bar 6, and a battery mounting plate 5; the relevant dimensional parameters are:
the simplified sizes of the battery cells are 120mm multiplied by 66mm multiplied by 18mm, and the space between the battery cells is 5 mm. The cooling plate size is 120mm x 110mm x 4mm, the runner thickness is 2mm, the channel section length entrance is 8mm, the exit is 15 mm.
The battery unit 7 is a square power lithium battery, such as lithium iron phosphate, ternary battery, etc. The bus bar 6 is mainly a carrier of current, and is made of conductive metal such as copper, copper nickel plating or aluminum, and in the embodiment, the bus bar 6 is a copper bar; the first insulating heat-conducting fin 3 and the second insulating heat-conducting fin 4 are made of silica gel sheet materials with good heat-conducting effect, light weight, flexibility, insulation and good moisture-proof effect; the first cooling plate 1 and the second cooling plate 2 are made of aluminum alloy materials with good heat conduction effect, light weight, high strength and good toughness; the heat conducting liquid is a mixed solution of 50% water and 50% glycol with high heat conductivity coefficient.
Gaps with the same distance are reserved among the five battery monomers 7 and used for natural convection of air, and the lugs of the battery monomers 7 are connected into a group through the bus bar 6, packaged in the battery mounting plate 5 and mounted between the first cooling plate 1 and the second cooling plate 2.
The first insulating heat-conducting fin 3 and the second insulating heat-conducting fin 4 are respectively arranged between the first cooling plate 1 and the second cooling plate 2 and the battery module 7 on two sides of the battery module 7, and the three are tightly adhered to each other so as to isolate the single battery 7 from the first cooling plate 1 and the second cooling plate 2, thereby achieving the effects of insulation and moisture resistance.
The power battery module of this embodiment is at the during operation, and the heat production of battery monomer 7 is taken away through the natural convection of air and circulation liquid cooling system between the battery cell clearance to reduce the temperature and the difference in temperature of battery module, control battery module is at certain temperature range work, improves the uniformity of battery temperature, effectively improves the life-span of group battery.
Fig. 3 and 4 show cross-sectional views of the interior of the cooling plate, in which two channels with bending structures are asymmetrically distributed along the central line of the cooling plate, wherein a, b, c, d, and e respectively represent points on the contour lines of the channels, and curves f and g represent contour lines corresponding to the channels, that is, connecting lines of central points of the inlet and outlet sections of the channels, both of which fall on the central lines of their respective half planes. The flow channel center line is formed by drawing five curved channel vertexes and connecting the vertexes by using a non-uniform rational-based spline curve structure, wherein the vertexes corresponding to the points a and e are respectively the center points of the rectangular flow channel section at the inlet and the outlet, the vertex of the point c is positioned on the vertical center line of the cooling plate, and the vertexes of the point b and the point d are in bilateral symmetry with the vertical center line. In addition, the variable structure of the cooling plate flow passage section is designed to be in unequal-size gradual change in the rectangular length-width ratio, wherein the gradual change size of the curve wave crests corresponding to the vertexes of the points b and d is 2mm, and the gradual change value of the curve wave troughs corresponding to the vertexes of the points c is 3mm, so that the actual cooling requirement of the battery is better met.
In an embodiment, after one channel with a tortuous structure is obtained by cutting and lofting, another asymmetric channel with a tortuous structure can be obtained by a linear array.
In the cross-sectional view of the inside of the cooling plate shown in fig. 4, two curved asymmetric variable structure flow channels are distributed up and down along the center line of the cooling plate, and the cross section of each flow channel is a rectangular cross section. In addition, when the flow channel variable structure is designed, the width of the rectangular cross section is kept unchanged, the length of the cross section of the flow channel is only changed to control the length-width ratio of the cross section of the flow channel, and the length-width ratio is controlled within the range with the best cooling effect.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A curve type variable structure cooling plate applied to a power battery module is characterized by comprising two runners which are arranged in parallel, wherein the runners are continuous curve structure runners with consistent structures and sizes, the cross-sectional areas of the runners are changed in a non-equal gradual change mode along the flowing direction of heat conducting liquid in the runners, and the two runners are distributed on the upper portion and the lower portion of the center line of the cooling plate; and the two ends of the cooling plate corresponding to the flow passage are respectively provided with an outer end flow guide port for inputting and outputting heat-conducting liquid.
2. The curved variable-structure cooling plate applied to the power battery module as claimed in claim 1, wherein the heat conducting liquid is a heat conducting liquid for cooling and heat dissipation when the temperature of the battery is too high or a heat conducting liquid for preheating when the temperature of the battery is too low.
3. The curved variable structure cooling plate applied to the power battery module as claimed in claim 1, wherein the flow channels are distributed asymmetrically.
4. The curved variable-structure cooling plate applied to the power battery module as claimed in claim 1, wherein the flow channel section is a rectangular section with a variable length-width ratio.
5. The cooling plate with the curved variable structure applied to the power battery module as claimed in claim 1, wherein in the non-uniform and gradually-changed cross section of the flow channel, the gradually-changed value of the cross section of the flow channel at the central part of the battery is greater than the values at the two ends of the battery.
6. A power battery module with a liquid cooling component is characterized in that a curve type variable structure cooling plate applied to the power battery module and provided with any one of claims 1-5 is used as a cooling plate, the power battery module comprises the power battery module and the cooling component, the power battery module comprises a plurality of battery monomers which are arranged in parallel, gaps are reserved among the battery monomers, the intervals among the adjacent battery monomers are equal, the battery monomers are packaged and fixed through a battery mounting plate, and the battery module is formed at the lug positions of the battery monomers in a serial or parallel mode through a busbar; the cooling assembly is arranged on two sides of the battery mounting plate of the power battery module and comprises insulating heat-conducting fins and a cooling plate, and the insulating heat-conducting fins are abutted against the inner side of the cooling plate and are attached to the side faces of two sides of the battery module.
7. The curved variable structure cooling plate applied to the power battery module as claimed in claim 6, wherein the battery cells are square power lithium batteries.
8. The cooling plate with the curved variable structure applied to the power battery module as claimed in claim 6, wherein the cooling plate is detachably replaced by plugging.
9. The cooling plate with the curved variable structure applied to the power battery module as claimed in claim 6, wherein the battery mounting plate is provided with a plug-in connector for fixedly connecting the cooling plate with the curved variable structure.
10. The curved variable-structure cooling plate applied to the power battery module as claimed in claim 6, wherein the bus bar is formed by copper, copper nickel plating or aluminum molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343776.2A CN110880631A (en) | 2019-12-24 | 2019-12-24 | Be applied to curved type variable structure cooling plate of power battery module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343776.2A CN110880631A (en) | 2019-12-24 | 2019-12-24 | Be applied to curved type variable structure cooling plate of power battery module |
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| CN110880631A true CN110880631A (en) | 2020-03-13 |
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| CN201911343776.2A Pending CN110880631A (en) | 2019-12-24 | 2019-12-24 | Be applied to curved type variable structure cooling plate of power battery module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111403853A (en) * | 2020-03-28 | 2020-07-10 | 哈尔滨工程大学 | Power battery thermal management system based on joint liquid cooling heat dissipation of utmost point ear and module bottom |
| CN114597542A (en) * | 2022-03-14 | 2022-06-07 | 南京航空航天大学 | Electric automobile power battery coupling heat sink |
-
2019
- 2019-12-24 CN CN201911343776.2A patent/CN110880631A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111403853A (en) * | 2020-03-28 | 2020-07-10 | 哈尔滨工程大学 | Power battery thermal management system based on joint liquid cooling heat dissipation of utmost point ear and module bottom |
| CN111403853B (en) * | 2020-03-28 | 2023-04-18 | 哈尔滨工程大学 | Power battery thermal management system based on joint liquid cooling heat dissipation of utmost point ear and module bottom |
| CN114597542A (en) * | 2022-03-14 | 2022-06-07 | 南京航空航天大学 | Electric automobile power battery coupling heat sink |
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