CN219642935U - Composite cold plate for battery module - Google Patents
Composite cold plate for battery module Download PDFInfo
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- CN219642935U CN219642935U CN202320733860.0U CN202320733860U CN219642935U CN 219642935 U CN219642935 U CN 219642935U CN 202320733860 U CN202320733860 U CN 202320733860U CN 219642935 U CN219642935 U CN 219642935U
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- cooling
- cavity
- battery module
- cold plate
- heat dissipation
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- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 238000001816 cooling Methods 0.000 claims abstract description 97
- 230000017525 heat dissipation Effects 0.000 claims abstract description 46
- 239000012782 phase change material Substances 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000002826 coolant Substances 0.000 claims abstract description 21
- 125000006850 spacer group Chemical group 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims description 45
- 238000005192 partition Methods 0.000 claims description 11
- 239000012188 paraffin wax Substances 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 3
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000012071 phase Substances 0.000 description 10
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 9
- 229910001416 lithium ion Inorganic materials 0.000 description 9
- 230000008859 change Effects 0.000 description 7
- 239000000110 cooling liquid Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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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- Secondary Cells (AREA)
Abstract
The utility model relates to a composite cold plate for a battery module, which comprises a cold plate part, a heat conduction buffer plate part and a baffle plate, wherein the cold plate part and the heat conduction buffer plate part are connected into a cavity with an accommodating space inside; the heat dissipation spacer is positioned in the first cooling cavity and divides the interior of the first cooling cavity into a plurality of heat dissipation flow channels for the circulation of liquid cooling medium; the second cooling chamber contains a phase change material. The utility model adopts a comprehensive cooling mode combining liquid cooling and phase change material cooling, has the advantages of good cooling effect, good temperature protection function, good sealing property, difficult liquid leakage and the like, and can effectively prevent or delay abrupt rise of temperature.
Description
Technical Field
The utility model relates to the technical field of cooling systems, in particular to a composite water cooling plate applied to the field of battery thermal management of electric automobiles.
Background
In the battery thermal management field of electric automobiles, the lithium ion battery has the advantages of low self-discharge rate, high specific energy, long cycle life, high open circuit voltage, multiple chargeable times, low pollution, low toxicity and the like, but the lithium ion battery has extremely high requirements on temperature during high-efficiency operation, the temperature suitable for the lithium ion battery to operate is 25-40 ℃, when the temperature exceeds the range, the high temperature can greatly influence the performance of the lithium ion battery, accelerate degradation, lead to irreversible chemical reaction, shorten the service life of the lithium ion battery and lead to thermal runaway of the battery. Under the high discharge rate of the lithium ion battery, the positive electrode, the negative electrode and the electrolyte can generate additional side reactions to release additional heat, and the impact of multiple heat can easily cause the dissolution of the diaphragm, so that large-area short circuit occurs, and safety accidents such as spontaneous combustion or explosion of the battery occur. Simulation results show that the highest temperature of the battery module under the conditions of 10C discharge multiplying power and no external cooling device reaches 66.85 ℃ and is far beyond the proper working temperature range of the lithium ion battery, so that the design of an efficient battery module heat dissipation system is necessary.
In the aspect of battery high-temperature cooling heat management technology, at present, the research is mainly carried out on cooling methods such as air cooling, liquid cooling, heat pipe cooling, phase change material cooling, composite cooling and the like, the composite cooling combines a plurality of heat management technologies, the advantages of the composite cooling are taken advantage of, the composite cooling system has good heat dissipation effect, however, the existing composite cooling system is mainly characterized in that the phase change material is filled in the gaps of the whole battery module, a cooling pipe is added in the phase change material, or the phase change material is filled in the gaps among the batteries, and the cooling plate is positioned below the battery module. The existing phase-change material of the phase-change liquid-cooling composite cooling system occupies a large volume, and the sealing problem of the phase-change material is not well solved. And increase the form of cold plate in battery module bottom, it is limited to the reduction of battery module's highest temperature, and the biggest difference in temperature of battery module inside battery cell is great, and the system radiating effect is not good.
Therefore, a new composite cold plate is needed to solve the above-mentioned problems in the prior art.
Disclosure of Invention
The utility model aims to provide a composite cold plate for a battery module, which is used for solving the problems that the cooling mode is single, the cooling effect is poor, the temperature protection function is not available, and the abrupt rise of the temperature cannot be prevented or delayed in the prior art.
The embodiment of the utility model can be realized by the following technical scheme:
a composite cold plate for a battery module, comprising: the cooling plate part is connected with the heat conduction buffer plate part to form a cavity with an accommodating space inside, the partition plate is positioned between the cooling plate part and the heat conduction buffer plate part, the cavity is divided into a first cooling cavity and a second cooling cavity which are independent, and the two independent cooling cavities are in heat transfer through the partition plate;
the heat dissipation spacer is positioned in the first cooling cavity and divides the interior of the first cooling cavity into a plurality of heat dissipation flow channels for circulating liquid cooling medium;
the second cooling cavity is internally provided with a phase change material.
Further, the cavity is integrally made of aluminum materials, the partition plates are welded inside the cavity, and two independent spaces are formed inside the cavity.
Further, the heat-conducting buffer plate portion comprises a buffer plate base body, and the buffer plate base body and the partition plate are connected to form a sealed second cooling cavity.
Further, paraffin or sodium thiosulfate is contained in the second cooling cavity.
Further, the thickness of the phase change material in the second cooling chamber is 1-3 mm.
Further, the cold plate part comprises a cold plate matrix, a heat dissipation spacer, a fluid inlet pipe and a fluid outlet pipe, the cold plate matrix is connected with the spacer to form a first cooling cavity, and an inlet end and an outlet end of the first cooling cavity are respectively in fluid communication with the fluid inlet pipe and the fluid outlet pipe.
Further, the heat dissipation spacer comprises fins and ribs, the fins and the ribs are arranged in a plurality, the fins and the ribs are arranged in parallel at intervals in the cold plate matrix, one end of each fin is in an opening shape, and the other end of each fin is in a closed shape, so that a heat dissipation flow channel with a vortex area is formed in the first cooling cavity.
Further, the fluid inlet pipe and the fluid outlet pipe are arranged along the horizontal direction, and a plurality of ribs are intermittently arranged in a straight shape so as to jointly form a plurality of confluence flow passages which are arranged in parallel along the horizontal direction.
Further, the fins are located in the confluence flow channel, and the fins and the ribs are arranged in a staggered mode.
Further, the fins are V-shaped, the closed ends of the fins are arranged towards the outlet end of the heat dissipation flow channel, and the open ends of the fins are arranged towards the inlet end of the heat dissipation flow channel.
The composite cold plate for the battery module has the following advantages:
according to the composite cooling plate, liquid cooling and phase change material cooling are integrated, the volume of a battery module cooling system is greatly reduced, the integral structure adopts an integrally formed cavity structure, the cavity is divided into two independent sealing spaces through the heat dissipation spacer, and the composite cooling plate has the advantages of good sealing performance of the phase change material and difficulty in liquid leakage;
the composite cold plate carries out heat transfer through the heat conduction aluminum sheet, the heat conductivity of the aluminum sheet is far greater than that of the phase change material, and the composite cold plate has the advantages of high heat conduction efficiency, high heat transfer speed and the like;
the phase-change material can slow down the temperature rise speed of the battery, prevent the occurrence of thermal runaway of the battery, play a role in pre-protection, improve the temperature uniformity of the battery module and facilitate the efficient operation of the battery module;
the utility model has the advantages of simple structure, high heat dissipation comprehensive performance, strong practicability, easy popularization and the like.
Drawings
Fig. 1 is a schematic perspective view illustrating a composite cold plate for a battery module according to the present utility model;
fig. 2 is a schematic cross-sectional view of a composite cold plate for a battery module according to the present utility model;
FIG. 3 is a schematic view showing the internal structure of the cold plate of the present utility model;
FIG. 4 is a schematic view of the overall structure of the cold plate base of the present utility model;
FIG. 5 is a DSC graph of phase change material paraffin at 28 ℃;
FIG. 6 is a graph of phase change material liquid phase ratio for a phase change temperature of 28 ℃;
fig. 7 is a graph of voltage-temperature characteristics of a lithium ion battery.
Reference numerals in the figures
A, a cold plate; 1-a cold plate substrate; 11-a first connection hole; 12-a second connection hole; 2-heat dissipation spacers; 3-fins; 4-ribs; 5-fluid inlet tube; 6-fluid outlet tube; 7-a first cooling chamber;
b-a heat conduction buffer plate; 8-a buffer plate matrix; 9-a second cooling chamber;
and a C-separator.
Detailed Description
The present utility model will be further described below based on preferred embodiments with reference to the accompanying drawings.
In addition, various components on the drawings have been enlarged (thick) or reduced (thin) for ease of understanding, but this is not intended to limit the scope of the utility model.
The singular forms also include the plural and vice versa.
In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the embodiments of the present utility model conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, terms first, second, etc. are used herein for distinguishing between different elements, but not limited to the order of manufacture, and should not be construed as indicating or implying any relative importance, as such may be different in terms of its detailed description and claims.
The terminology used in the description presented herein is for the purpose of describing embodiments of the utility model and is not intended to be limiting of the utility model. It should also be noted that unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be connected mechanically, directly or indirectly through an intermediate medium, and can be communicated internally. The specific meaning of the above terms in the present utility model will be specifically understood by those skilled in the art.
Fig. 1 is a schematic perspective view of a composite cold plate for a battery module according to the present utility model, fig. 2 is a schematic cross-sectional view of a composite cold plate for a battery module according to the present utility model, and as shown in fig. 1 and 2, a composite cold plate for a battery module includes a cold plate portion a, a heat-conductive buffer plate portion B, and a separator C, wherein the cold plate portion a and the heat-conductive buffer plate portion B are connected to form a cavity having a receiving space therein, the separator C is positioned between the cold plate portion a and the heat-conductive buffer plate portion B, and divides the cavity into two independent first cooling cavities 7 and second cooling cavities 9, and the two independent cooling cavities are heat-transferred through the separator C;
the heat dissipation spacer 2 is positioned in the first cooling cavity 7, divides the interior of the first cooling cavity 7 into a plurality of heat dissipation flow channels for flowing liquid cooling medium, and is used for liquid cooling, so that the cooling efficiency is improved;
the second cooling chamber 9 contains a phase change material for temperature protection, preventing or delaying the abrupt rise of temperature.
Specifically, fig. 3 is a schematic view of the internal structure of the cold plate portion a in the present utility model, as shown in fig. 3, the cold plate portion a includes a cold plate base 1, a heat dissipation spacer 2, a fluid inlet pipe 5 and a fluid outlet pipe 6, the cold plate base 1 and the spacer C are connected to form a first cooling cavity 7, an inlet end and an outlet end of the first cooling cavity 7 are respectively in fluid communication with the fluid inlet pipe 5 and the fluid outlet pipe 6, and the interior of the first cooling cavity 7 is in fluid communication with the fluid inlet pipe 5 and the fluid outlet pipe 6 through the fluid inlet pipe 5 and the fluid outlet pipe 6, so that a liquid cooling medium flows in a heat dissipation flow channel in the first cooling cavity 7 for performing flowing heat dissipation.
The heat conduction buffer plate part B comprises a buffer plate base body 8, the buffer plate base body 8 is connected with the partition plate C to form a sealed second cooling cavity 9, and a phase change material is contained in the second cooling cavity 9 and used as a heat storage device.
In some preferred embodiments, the cavity is made of aluminum material, the materials of the cold plate base body 1 and the buffer plate base body 8 are aluminum, the cold plate base body 1 and the buffer plate base body 8 are shells made of aluminum material, and the partition board C is connected to the inside of the cavity through welding and used for enhancing the tightness of the inside of the cavity, ensuring the independence and tightness of two cooling cavities inside the cavity and avoiding seepage and weeping.
In some preferred embodiments, the heat dissipation spacer 2 includes fins 3 and ribs 4, the number of the fins 3 and the number of the ribs 4 are all a plurality of, the fins 3 and the ribs 4 of a plurality of are arranged in the cold plate base 1 in parallel at intervals, and one end of each fin 3 is open, and the other end is closed, so that a heat dissipation flow channel with a vortex area is formed in the first cooling cavity 7, and when the liquid cooling medium flows to the vortex area, turbulence can be generated, and flow is split after flowing through two ends of the ribs 4.
In some preferred embodiments, the inlet end and the outlet end of the heat dissipation channel are respectively in fluid communication with the fluid inlet pipe 5 and the fluid outlet pipe 6, and the fluid inlet pipe 5, the fluid outlet pipe 6 and the ribs 4 are parallel to each other, so that the flowing direction of the liquid along the inlet and the outlet coincides with the arranging direction of the heat dissipation channel, and the liquid cooling medium can flow rapidly along the converging channel in the heat dissipation channel and flow in a sub-flow manner after forming turbulence in the converging channel.
Specifically, the fluid inlet pipe 5 and the fluid outlet pipe 6 are arranged along the horizontal direction, and the ribs 4 are intermittently arranged in a straight shape to form a plurality of converging flow passages in parallel along the horizontal direction, so that the liquid cooling medium can flow in a rapid and orderly manner along the horizontal direction, meanwhile, the liquid cooling medium can flow in a longitudinal split manner through gaps between two adjacent ribs 4 and split into various areas, the liquid flowing range is enlarged, the problem of large inlet and outlet pressure drops caused by the problem of long and narrow existing cooling liquid channels is effectively solved, and the power consumption of the system is effectively reduced.
In some preferred embodiments, the fins 3 are located in the converging flow channels, and the fins 3 and the ribs 4 are arranged in a staggered manner, so that the liquid cooling medium can be fully distributed in a staggered manner by using high and low positions, and the circulation range is enlarged.
In some preferred embodiments, the ribs 4 are located at a lower position and/or a lower position between two adjacent fins 3, so that the fins 3 and the ribs 4 are arranged in parallel at intervals, and the fins 3 and the ribs 4 are matched with each other in a staggered manner, so that gaps between the fins 3 and the ribs 4 are fully utilized, and the flow distribution is further divided, the flow distribution range is increased, and meanwhile, radial backflow is effectively avoided.
In some preferred embodiments, a plurality of fins 3 are located in the converging flow passage and are spaced apart from each other in parallel, so that each fin 3 can form a vortex area at the location thereof, and when the liquid cooling medium flows through the vortex area of the fin 3, turbulence can be formed, and the turbulence has the advantages of good heat transfer effect and higher heat dissipation efficiency.
In some preferred embodiments, the fins 3 are V-shaped, so that after the liquid cooling medium impacts the V-shaped inner wall surface, vortex is induced to deposit near the inner wall surface due to the oblique pressure effect, the vortex acts on the inner wall surface and accelerates along the inner wall surface, so that the liquid medium stretches along the inner wall surface, then the vortex rebounds on the inner wall surface, and secondary vortex is induced to generate, thereby forming turbulence, and in the process, heat transfer of the liquid cooling medium can be accelerated by using turbulence of the turbulence.
In some preferred embodiments, the closed end of the fin 3 is disposed towards the outlet end of the heat dissipation flow channel, and the open end of the fin 3 is disposed towards the inlet end of the heat dissipation flow channel, so that the liquid cooling medium can directly impact the open end of the fin 3 to the inner wall surface thereof during the circulation process from the inlet end of the heat dissipation flow channel towards the outlet end, thereby rapidly forming turbulence, accelerating the speed of forming turbulence, and having the advantages of rapid response and high efficiency.
In some preferred embodiments, the inlet end and the outlet end of the heat dissipation channel are respectively provided with a plurality of inlets and outlets, as shown in fig. 4, the cold plate substrate 1 includes a first connection hole 11 and a second connection hole 12, the fluid inlet pipe 5 is connected with the first connection hole 11, and the fluid outlet pipe 6 is connected with the second connection hole 12, so that the liquid cooling medium flows into the heat dissipation channel through the first connection hole 11 after passing through the fluid inlet pipe 5, and flows out through the fluid outlet pipe 6 after passing through the second connection hole 12.
In some preferred embodiments, the number of the fluid inlet pipes 5 and the fluid outlet pipes 6 is a plurality, and the fluid inlet pipes 5 and the fluid outlet pipes 6 of the plurality are respectively in one-to-one correspondence with the first connecting holes 11 and the second connecting holes 12, so that the liquid cooling medium can flow into the heat dissipation channels through a plurality of independent pipelines respectively, thereby effectively shortening the distance between the inlet and the outlet channels and further reducing the pressure drop of the inlet and the outlet of the cold plate.
In some preferred embodiments, the number of the fluid inlet pipes 5 and the number of the fluid outlet pipes 6 are the same and correspond to each other, wherein the fluid inlet pipes 5 and the fluid outlet pipes 6 located in the same horizontal line are a group of inlet and outlet flow paths, and each group of inlet and outlet flow paths and the rib 4 are located in the same horizontal line, so that after the liquid cooling medium flows into the heat dissipation flow channels through the first connecting holes 11, the rib 4 can quickly split the liquid cooling medium into different confluence flow channels while not providing circulation resistance, form turbulence in the respective confluence flow channels, and split again, thereby effectively increasing the circulation range of the liquid cooling medium and greatly improving the heat dissipation efficiency.
In some preferred embodiments, the liquid cooling medium comprises cooling water, chilled water, or refrigerant, or the like.
In some embodiments, it is conceivable that the heat dissipation spacer 2 may be disposed in the first cooling cavity 7 in a serpentine channel or a parallel channel, so long as the heat dissipation spacer 2 is capable of flowing a liquid cooling medium, but the heat dissipation spacer 2 is disposed in the present utility model to enhance heat dissipation efficiency.
Further, by changing the thickness of the phase change material in the second cooling chamber 9, the heat dissipation efficiency of the present utility model can be further improved.
Preferably, the thickness of the phase material in the second cooling chamber 9 is 1-3 mm, preferably 2mm, and the cooling effect of the composite cooling plate is better in the above numerical range.
In some preferred embodiments, the second cooling chamber 9 contains a phase-change material such as paraffin or sodium thiosulfate, so that the characteristics of high latent heat and good temperature control performance of the phase-change material are utilized to improve the temperature uniformity of the battery module and prevent or delay the abrupt temperature rise.
The cooling effect of the present utility model was further confirmed by combining the following specific test results:
since paraffin wax with a phase transition temperature of 28 ℃ begins to melt at 27.6 ℃,33.8 ℃ reaches an endothermic peak, and the paraffin wax is completely melted at 35.7 ℃. Through tests, when the battery module is cooled by the cold plate part A, the highest temperature of the battery module is 33.62 ℃, and in order to make the phase-change material paraffin function to the maximum extent, the phase-change material with the phase-change temperature of 28 ℃ is adopted for carrying out lithium ion battery module composite cooling test by comprehensively considering the analysis contents.
As shown in fig. 5, fig. 5 shows a DSC curve of paraffin wax as a phase change material at 28 ℃, wherein the upper graph shows an exothermic process of converting the phase change material from a liquid state to a solid state, the lower graph shows an endothermic process of converting the phase change material from a solid state to a liquid state, and the composite cold plate uses the phase change endothermic performance of the phase change material, so that paraffin wax as the phase change temperature of 28 ℃ begins to melt at 27.6 ℃, reaches an endothermic peak at 33.8 ℃ and completely melts at 35.7 ℃. Therefore, the highest temperature of the battery module 10C of the cold plate part A is 33.62 ℃ under high-rate discharge, and on the basis, the paraffin with the phase transition temperature of 28 ℃ is contained in the heat conduction buffer plate part B, so that the heat dissipation performance of the fin type cold plate can be further improved, and the highest temperature of the battery module is reduced.
In some preferred embodiments, the composite cold plate has the best cooling effect when the phase change material has a phase change temperature of 28 ℃ and a phase change material thickness of 2mm, and the highest temperature of the battery module is 33.42 ℃, the maximum temperature difference of the single batteries is 0.45 ℃, and the inlet-outlet pressure drop of the cold plate is 1306.456Pa.
In some preferred embodiments, the second cooling chamber 9 is filled with phase change materials with different phase change temperatures, so as to achieve different effects.
For example, when the phase change temperature of the phase change material is 28 ℃, and the thickness of the phase change material is 2mm, as shown in fig. 6, fig. 6 is a graph of the phase change material liquid phase ratio of the phase change material with the phase change temperature of 28 ℃, the phase change material is not melted in the cooling liquid inlet area, and the rest areas are all melted by absorbing heat, so that the heat dissipation effect of the fin cold plate can be improved by filling the second cooling cavity 9 with the phase change material with the temperature of 28 ℃ under the condition that the flow of the cold plate is sufficient.
As shown in fig. 7, the battery module has abrupt and fluctuating voltage after 63.9 c, so thermal runaway was prevented before that. Under the condition that the flow of the cooling liquid in the first cooling cavity 7 is insufficient or the inlet and the outlet of the cooling liquid are blocked, the second cooling cavity 9 is filled with the phase-change material with the phase-change temperature of 58 ℃, so that the temperature rise of the battery module can be slowed down, and the occurrence of thermal runaway phenomenon can be prevented, and therefore under the condition that the flow is insufficient or the inlet and the outlet of the cooling liquid are blocked, the temperature excessively rise can be slowed down by filling the phase-change material with the temperature of 60 ℃ in the second cooling cavity 9, and the occurrence of the thermal runaway phenomenon can be prevented.
While the foregoing is directed to embodiments of the present utility model, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. A composite cold plate for a battery module, comprising:
the cooling plate comprises a cooling plate part (A), a heat conduction buffer plate part (B) and a partition plate (C), wherein the cooling plate part (A) and the heat conduction buffer plate part (B) are connected into a cavity with an accommodating space inside, the partition plate (C) is positioned between the cooling plate part (A) and the heat conduction buffer plate part (B), the cavity is divided into a first independent cooling cavity (7) and a second independent cooling cavity (9), and two independent cooling cavities are in heat transfer through the partition plate (C);
the heat dissipation spacer (2) is positioned in the first cooling cavity (7) and divides the interior of the first cooling cavity (7) into a plurality of heat dissipation flow channels for the circulation of liquid cooling medium;
the second cooling cavity (9) is internally provided with a phase change material.
2. The composite cold plate for a battery module according to claim 1, wherein:
the cavity is integrally made of aluminum materials, the partition plate (C) is welded inside the cavity, and two independent spaces are formed inside the cavity.
3. The composite cold plate for a battery module according to claim 1, wherein:
the heat conduction buffer plate part (B) comprises a buffer plate base body (8), and the buffer plate base body (8) and the partition plate (C) are connected to form a sealed second cooling cavity (9).
4. The composite cold plate for a battery module according to claim 1, wherein:
paraffin or sodium thiosulfate is contained in the second cooling cavity (9).
5. The composite cold plate for a battery module according to claim 1, wherein:
the thickness of the phase change material in the second cooling cavity (9) is 1-3 mm.
6. The composite cold plate for a battery module according to claim 1, wherein:
the cooling plate part (A) comprises a cooling plate base body (1), a heat dissipation spacer (2), a fluid inlet pipe (5) and a fluid outlet pipe (6), wherein the cooling plate base body (1) is connected with the spacer (C) to form a first cooling cavity (7), and an inlet end and an outlet end of the first cooling cavity (7) are respectively in fluid communication with the fluid inlet pipe (5) and the fluid outlet pipe (6).
7. The composite cold plate for a battery module according to claim 6, wherein:
the heat dissipation spacer (2) comprises fins (3) and ribs (4), the fins (3) and the ribs (4) are arranged in a plurality, the fins (3) and the ribs (4) are arranged in parallel at intervals in the cold plate base body (1), one end of each fin (3) is in an opening shape, the other end of each fin is in a closed shape, and a heat dissipation flow channel with a vortex area is formed in the first cooling cavity (7).
8. The composite cold plate for a battery module according to claim 7, wherein:
the fluid inlet pipe (5) and the fluid outlet pipe (6) are arranged along the horizontal direction, and a plurality of ribs (4) are intermittently arranged in a straight shape so as to jointly form a plurality of converging flow passages which are arranged in parallel along the horizontal direction.
9. The composite cold plate for a battery module according to claim 7, wherein:
the fins (3) are located in the confluence flow channels, and the fins (3) and the ribs (4) are arranged in a staggered mode.
10. The composite cold plate for a battery module according to claim 7, wherein:
the fin (3) is V-shaped, the closed end of the fin (3) faces the outlet end of the heat dissipation flow channel, and the open end of the fin (3) faces the inlet end of the heat dissipation flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320733860.0U CN219642935U (en) | 2023-03-31 | 2023-03-31 | Composite cold plate for battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320733860.0U CN219642935U (en) | 2023-03-31 | 2023-03-31 | Composite cold plate for battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219642935U true CN219642935U (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320733860.0U Active CN219642935U (en) | 2023-03-31 | 2023-03-31 | Composite cold plate for battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219642935U (en) |
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2023
- 2023-03-31 CN CN202320733860.0U patent/CN219642935U/en active Active
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