CN108879023B - Air and cooling liquid coupled electric automobile battery pack thermal management system - Google Patents
Air and cooling liquid coupled electric automobile battery pack thermal management system Download PDFInfo
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- CN108879023B CN108879023B CN201810771610.XA CN201810771610A CN108879023B CN 108879023 B CN108879023 B CN 108879023B CN 201810771610 A CN201810771610 A CN 201810771610A CN 108879023 B CN108879023 B CN 108879023B
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- 239000000110 cooling liquid Substances 0.000 title claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 191
- 230000008878 coupling Effects 0.000 claims abstract description 117
- 238000010168 coupling process Methods 0.000 claims abstract description 117
- 238000005859 coupling reaction Methods 0.000 claims abstract description 117
- 239000000178 monomer Substances 0.000 claims abstract description 64
- 230000001105 regulatory effect Effects 0.000 claims abstract description 29
- 239000012782 phase change material Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 27
- 239000000741 silica gel Substances 0.000 claims description 27
- 229910002027 silica gel Inorganic materials 0.000 claims description 27
- 230000000712 assembly Effects 0.000 claims description 18
- 238000000429 assembly Methods 0.000 claims description 18
- 230000002528 anti-freeze Effects 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 10
- 238000004321 preservation Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 11
- 239000004831 Hot glue Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 10
- 239000002131 composite material Substances 0.000 description 8
- 229920001684 low density polyethylene Polymers 0.000 description 8
- 239000004702 low-density polyethylene Substances 0.000 description 8
- 239000012188 paraffin wax Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000007726 management method Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- 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
-
- 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
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
-
- 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
-
- 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
Abstract
The invention relates to the technical field of thermal management of electric automobile power battery packs, in particular to an electric automobile battery pack thermal management system with air and cooling liquid coupled. The device is assembled with a vehicle-mounted battery monomer, is arranged on a vehicle body, is connected with an electronic control unit ECU of the vehicle, and consists of a battery box body, a phase change material, a battery box end cover, a battery cooling module, an air inlet duct guide cover, an air outlet duct guide cover, a thermocouple and a speed regulating fan; a thermocouple and a speed regulating fan are arranged on an air inlet of an end cover of the battery box, a thermocouple is arranged on an air outlet, the thermocouple is connected with an ECU (electronic control unit) of the automobile, and the ECU is connected with the speed regulating fan and controls the rotating speed of the speed regulating fan. According to the invention, the temperature consistency between the surface of the vehicle-mounted battery monomer and the vehicle-mounted battery monomer is improved; the heat exchange speed of the air and the coupling cooling plate is improved; the high-temperature heat dissipation and low-temperature heat preservation capabilities of the system are further improved, and good heat dissipation effects can be obtained under different working conditions.
Description
1. Technical field
The invention relates to the technical field of thermal management of electric automobile power battery packs, in particular to an electric automobile battery pack thermal management system with air and cooling liquid coupled.
2. Background art
Under the promotion of energy crisis and environmental pollution problems, new energy automobiles are rapidly developed, and hybrid electric vehicles and pure electric vehicles are typical representatives thereof. In such automobiles, the battery pack is typically composed of on-vehicle battery cells in series-parallel connection for providing a suitable voltage and sufficient electric power. In the running process of the automobile, the chemical reaction inside the battery and the internal resistance of the battery can cause the continuous rise of the temperature of the vehicle-mounted battery monomer and the inconsistent temperature of each part on the vehicle-mounted battery monomer; meanwhile, due to the fact that the difference of internal resistance and internal chemical components of the battery caused by manufacturing errors exists among all the vehicle-mounted battery monomers, the heat dissipation environments of all the vehicle-mounted battery monomers in the battery pack are not identical, and therefore the temperatures of all the vehicle-mounted battery monomers in the battery pack are inconsistent, and finally the heat of the battery pack and the internal temperature of the battery pack are inconsistent. This may not only cause a decrease in capacity and life of the battery pack, but may even create serious safety problems. Meanwhile, when the temperature of the battery pack is too low, the battery pack not only greatly reduces the charge and discharge capacity, but also damages the service life of the battery pack. Therefore, the temperature control of the automobile power battery pack to improve the high-temperature heat dissipation and low-temperature heat preservation capabilities of the battery pack and to maintain the consistency of the internal temperature of the battery pack is a major problem to be solved by the battery pack thermal management system.
At present, the heat dissipation mode adopted by the automobile power battery pack is mainly air cooling and liquid cooling. The air cooling heat dissipation is to ventilate the battery pack, and takes away heat through the temperature difference heat exchange between air and the battery pack, and the liquid cooling heat dissipation is to directly or indirectly contact with the battery through liquid, and takes away heat through the flow of cooling liquid. However, these heat dissipation methods mainly focus on how to conduct heat out of the battery pack, and are not effective in maintaining the uniformity of the internal temperature of the battery pack. The patent office of China national intellectual property office discloses a heat management system of an electric automobile battery pack and a heat management method thereof with a publication number of CN102832425A in 2012, 12 and 19; the technology absorbs heat generated by the batteries by placing a cold plate between two layers of batteries, wherein a cooling liquid flow channel is arranged in the cold plate. The technology utilizes cooling liquid to carry heat out of the battery pack, but the pipeline in the cold plate is overlong, the temperature rise in the flowing process of the cooling liquid is overhigh, and the cooling condition of the tail end of the pipeline is poor, so that the temperature consistency inside the battery pack is not high. The patent office of China national intellectual property office discloses a multi-outlet electric automobile battery air-cooling battery box with a publication number of CN205621775U at 10 month 05 of 2016, and the name is 'a multi-outlet electric automobile battery air-cooling battery box with cooling fins'; the technology adds fins on an air duct formed by cooling fins between two batteries, takes away heat by utilizing the flow of air, but has lower heat dissipation efficiency when the ambient temperature is higher, and does not have the heat preservation function of the battery pack.
3. Summary of the invention
The invention aims to overcome the defects of the prior art and provides an electric automobile battery pack thermal management system with air and cooling liquid coupled.
The invention is assembled with a vehicle-mounted battery monomer, is arranged on a vehicle body, is connected with an electronic control unit ECU of the vehicle, and adopts the technical scheme that the automobile comprises a battery box body, a phase change material, a battery box end cover, a battery cooling module, an air inlet duct guide cover, an air outlet duct guide cover, a thermocouple and a speed regulating fan;
the battery box body is a cuboid open shell of a double-layer shell, a cavity is arranged between two layers of the double-layer shell, and a phase change material injection hole is formed in the shell; the melted phase-change material is injected into the cavity through the phase-change material injection hole and is sealed by the plug and the sealing ring; the battery box end cover consists of a cover plate, an air inlet and an air outlet, the air inlet is positioned in the middle of the cover plate, the air outlet is positioned at two sides of the air inlet, and the size of the cover plate is matched with the size of an opening of the battery box body;
the battery cooling module is formed by combining a coupling cooling plate and a vehicle-mounted battery monomer; the coupling cooling plate is formed by respectively sealing and fixing an upper heat collecting plate and a lower heat collecting plate on the upper surface and the lower surface of the arched water tank, and is matched with the size of a vehicle-mounted battery monomer, and antifreeze fluid is poured into the arched water tank and sealed by a plug; the arched water tank sealed by the upper and lower heat collecting plates forms a plurality of longitudinal ventilating ducts; the upper and lower heat collecting plates and the arched water tank are made of heat conducting materials; the upper surface and the lower surface of each coupling cooling plate are respectively stuck with a vehicle-mounted battery monomer by heat-conducting silica gel to form a battery cooling module; according to the number of the vehicle-mounted battery monomers, the number of the battery cooling modules is determined, and the left sides and the right sides of the coupling cooling plates of 3 or 4 battery cooling modules are bonded together by using heat-conducting silica gel to form a battery cooling module assembly;
the adjacent two groups of battery cooling module assemblies are combined, and are sealed and fixed by an air inlet duct guide cover and connected between the two groups of battery cooling modules, and an air inlet channel is formed by the two groups of battery cooling module assemblies and a corresponding longitudinal air duct; two air outlet duct guide covers are respectively and hermetically fixed and connected to the other two sides of the longitudinal ventilating duct of the two groups of battery cooling module assemblies, and respectively and correspondingly form two air outlet channels; the two groups of battery cooling module assemblies are integrally installed in a battery box body after being combined; the end cover of the battery box is fixedly arranged on the opening of the battery box body, an air inlet on the end cover of the battery box is correspondingly connected with the air inlet channel, and two air outlets on the end cover of the battery box are correspondingly connected with the two air outlet channels respectively;
a thermocouple and a speed regulating fan are arranged on an air inlet of an end cover of the battery box, a thermocouple is arranged on an air outlet, the thermocouple is connected with an ECU (electronic control unit) of the automobile, and the ECU is connected with the speed regulating fan and controls the rotating speed of the speed regulating fan.
The beneficial effects of the invention are as follows:
1. the antifreeze in the bow-shaped water tank of the coupling cooling plate can enhance heat exchange through the internal flow, so that the temperature consistency of the surface of the vehicle-mounted battery monomer is improved; the adjacent coupling cooling plates are in contact heat transfer through heat conduction silica gel, so that the temperature consistency between the vehicle-mounted battery monomers is improved;
2. the longitudinal ventilating duct formed between the bow-shaped water tank in the coupling cooling plate and the heat collecting plate increases the heat exchange area of the antifreeze and the air, and improves the heat exchange speed of the air and the coupling cooling plate;
3. the specific heat capacity of the battery cooling module is increased by utilizing the antifreeze in the coupling cooling plate, the change speed of the temperature of the battery pack is effectively reduced, and the high-temperature heat dissipation and low-temperature heat preservation capacity of the system are improved; the phase change material filled in the interlayer of the battery box body can melt and absorb heat when the temperature of the battery pack is too high, and solidify and release heat when the environmental temperature is too low, so that the high-temperature heat dissipation and low-temperature heat preservation capability of the system are further improved;
4. the electronic control unit ECU can regulate the air flow rate by controlling the rotating speed of the fan according to the temperatures of the air inlet and the air outlet monitored by the thermocouple, and good heat dissipation effect can be obtained under different working conditions.
4. Description of the drawings
Fig. 1 is an exploded view of an overall structure schematic of the present invention applied to 12 vehicle-mounted battery cells;
FIG. 2 is an isometric view of a schematic view of the exterior structure of the present invention;
FIG. 3 is a top view of a schematic diagram of a coupled cooling plate structure of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a top view of a schematic diagram of the end cap structure of the battery case of the present invention;
FIG. 6 is an elevation view of a schematic diagram of the end cap structure of the battery case of the present invention;
FIG. 7 is a cross-sectional view A-A of FIG. 6;
FIG. 8 is a schematic diagram of the combined installation of a battery cooling module assembly, an air inlet duct baffle, an air outlet duct baffle, a battery box end cover, a speed regulating fan and a thermocouple of the invention applied to 12 vehicle-mounted battery cells;
FIG. 9 is an isometric view of a battery cooling module assembly schematic of the present invention applied to 12 vehicle-mounted battery cells;
FIG. 10 is an isometric view of a schematic structural diagram of a battery case of the present invention;
FIG. 11 is a top view of a schematic diagram of the battery case of the present invention;
FIG. 12 is a cross-sectional view A-A of FIG. 11;
FIG. 13 is a B-B cross-sectional view of FIG. 11;
FIG. 14 is a schematic diagram of a control circuit according to the present invention;
fig. 15 is an exploded view showing the overall structure of the present invention applied to 16 vehicle-mounted battery cells;
FIG. 16 is a schematic view of a battery cooling module assembly, an inlet duct baffle, an outlet duct baffle, a battery box end cap, a speed regulating fan and a thermocouple assembly of the present invention applied to 16 vehicle-mounted battery cells;
fig. 17 is an isometric view of a battery cooling module assembly schematic of the invention applied to 16 vehicle-mounted battery cells.
Reference numerals
1. The battery box body 1-1, the phase change material injection hole 1-2, the sealing ring 1-3 and the plug;
2. the battery box end cover 2-1 is provided with a cover plate 2-2-1, an air outlet 2-2-2, an air outlet 2-3 and an air inlet;
3. an air inlet duct guide cover;
4-1, an air outlet duct guide cover; 4-2, an air outlet duct guide cover;
5-1, 5-2, 5-3, 5-4, 5-5, 5-6, 5-7, 5-8, 5-9, 5-10, 5-11, 5-12, 5-13, 5-14, 5-15, 5-16, and;
6-1, coupling cooling plates 6-1-1, upper heat collecting plates 6-1-2, lower heat collecting plates 6-1-2, bow-shaped water tanks 6-1-3, antifreeze solution 6-1-4, plugs 6-2, coupling cooling plates 6-3, coupling cooling plates 6-4, plugs 6-5, coupling cooling plates 6-5-4, plugs 6-6, coupling cooling plates 6-4, plugs 6-7, coupling cooling plates 6-7-4, plugs 6-8, coupling cooling plates 6-8-4, plugs;
7-1, a thermocouple 7-2, a thermocouple 7-3 and a thermocouple;
8. an electronic control unit ECU;
9. a speed regulating fan.
5. Detailed description of the preferred embodiments
Embodiment one:
the following describes in detail the implementation procedure of the invention applied to 12 vehicle-mounted battery cells with reference to the accompanying drawings:
as shown in fig. 1, 2 and 14, the invention is assembled with a vehicle-mounted battery monomer, is arranged on a vehicle body, is connected with an Electronic Control Unit (ECU) 8 of the vehicle, and consists of a battery box body 1, a low-density polyethylene/paraffin composite phase-change material, a battery box end cover 2, a battery cooling module, an air inlet duct guide cover 3, an air outlet duct guide cover 4-1, an air outlet duct guide cover 4-2, a thermocouple 7-1, a thermocouple 7-2, a thermocouple 7-3 and a speed regulating fan 9;
as shown in fig. 1, fig. 2, fig. 5, fig. 6, fig. 7, fig. 8, fig. 10, fig. 11, fig. 12 and fig. 13, the battery box 1 is a cuboid open shell of a double-layer shell, a cavity is arranged between two layers of the double-layer shell, and a phase change material injection hole 1-1 is arranged on the shell; the melted low-density polyethylene/paraffin composite phase-change material is injected into the cavity through the phase-change material injection hole 1-1 and is sealed by the plug 1-3 and the sealing ring 1-2; the battery box end cover 2 consists of a cover plate 2-1, an air inlet 2-3, an air outlet 2-2-1 and an air outlet 2-2-2, wherein the air inlet 2-3 is positioned in the middle of the cover plate 2-1, the air outlet 2-2-1 and the air outlet 2-2-2 are positioned at two sides of the air inlet 2-3, and the size of the cover plate 2-1 is matched with the size of an opening of the battery box body 1;
as shown in fig. 1, 3, 4, 8 and 9, the battery cooling module is formed by combining a coupling cooling plate 6-1 with a vehicle-mounted battery cell 5-1 and a vehicle-mounted battery cell 5-7; the coupling cooling plate 6-1 is formed by respectively sealing and fixing an upper heat collecting plate 6-1-1 and a lower heat collecting plate 6-1-2 on the upper surface and the lower surface of the arched water tank 6-1-2, and is matched with the sizes of the vehicle-mounted battery unit 5-1 and the vehicle-mounted battery unit 5-7, and the arched water tank 6-1-2 is filled with an antifreezing solution 6-1-3 and sealed by a plug 6-1-4; the bow-shaped water tanks 6-1-2 sealed by the upper heat collecting plate 6-1-1-1 and the lower heat collecting plate 6-1-1-2 form a plurality of longitudinal ventilation channels; the upper and lower heat collecting plates 6-1-1, 6-1-1-2 and the arched water tank 6-1-2 are made of metal materials; the upper surface and the lower surface of the coupling cooling plate 6-1 are respectively stuck with the vehicle-mounted battery monomers 5-1 and 5-7 by heat conduction silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-2 are respectively stuck with the vehicle-mounted battery monomers 5-2 and 5-8 by heat-conducting silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-3 are respectively stuck with the vehicle-mounted battery monomers 5-3 and 5-9 by heat-conducting silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-4 are respectively stuck with the vehicle-mounted battery monomers 5-4 and 5-10 by heat conduction silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-5 are respectively stuck with the vehicle-mounted battery monomers 5-5 and 5-11 by heat conducting silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-6 are respectively stuck with the vehicle-mounted battery monomers 5-6 and 5-12 by heat conduction silica gel to form a battery cooling module; the left side and the right side of the coupling cooling plates 6-1, 6-2 and 6-3 are bonded together by using heat-conducting silica gel to form a battery cooling module assembly; bonding the left side and the right side of the coupling cooling plates 6-4, 6-5 and 6-6 together by using heat-conducting silica gel to form another battery cooling module assembly;
as shown in fig. 1, 2 and 8, two adjacent battery cooling module assemblies are combined, an air inlet duct guide cover 3 is fixedly sealed and connected between the two battery cooling modules by hot melt adhesive, and an air inlet channel is formed by the two battery cooling module assemblies and a corresponding longitudinal air duct; the two air outlet duct guide covers 4-1 and 4-2 are respectively fixed, sealed and connected with the other two sides of the longitudinal ventilating duct of the two groups of battery cooling module assemblies by hot melt adhesive to respectively and correspondingly form two air outlet channels; the two groups of battery cooling module assemblies are integrally installed into a battery box body 1 with the internal size matched with the battery cooling module assemblies after being combined; the battery box end cover 2 is arranged on the opening of the battery box body 1 and is sealed and fixed by hot melt adhesive; the air inlet 2-3 on the battery box end cover 2 is correspondingly and hermetically connected with the air inlet channel through hot melt adhesive, and the two air outlets 2-2-1 and 2-2-2 on the battery box end cover 2 are respectively and correspondingly and hermetically connected with the two air outlet channels through hot melt adhesive;
as shown in fig. 1, 2 and 14, a thermocouple 7-2 and a speed regulating fan 9 are installed on an air inlet 2-3 of a battery box end cover 2, a thermocouple 7-1 is installed on an air outlet 2-2-1, a thermocouple 7-3 is installed on the air outlet 2-2-2, the thermocouple 7-1, the thermocouple 7-2 and the thermocouple 7-3 are respectively connected with an Electronic Control Unit (ECU) 8, and the Electronic Control Unit (ECU) 8 is connected with the speed regulating fan 9 to control the rotating speed of the speed regulating fan 9.
The invention is applied to the operation process of 12 vehicle-mounted battery monomers:
during the running process of the automobile, the electronic control unit ECU8 conveys cold air into the air inlet duct guide cover 3 from the air inlet 2-3 on the battery box end cover 2 through the speed regulating fan 9, and then enters the air outlet duct guide cover 4-1 through the coupling cooling plate 6-1, the coupling cooling plate 6-2 and each longitudinal air duct in the coupling cooling plate 6-3 respectively; the air enters the air outlet duct guide cover 4-2 through the coupling cooling plate 6-4, the coupling cooling plate 6-5 and each longitudinal air duct in the coupling cooling plate 6-6; finally, respectively flowing out from air outlets 2-2-1 and 2-2-2 on the battery box end cover 2;
the heat generated by the vehicle-mounted battery unit 5-1 and the vehicle-mounted battery unit 5-7 is conducted to the bow-shaped water tank 6-1-2 through the upper heat collecting plate 6-1-1 and the lower heat collecting plate 6-1-2 of the coupling cooling plate 6-1 respectively, the specific heat capacity of the antifreeze 6-1-3 in the bow-shaped water tank 6-1-2 is higher, and the heat generated by the vehicle-mounted battery unit 5-1 and the vehicle-mounted battery unit 5-7 can be effectively absorbed and the temperature rise is delayed. Meanwhile, the cooling liquid 6-1-3 enhances heat exchange through internal flow, and improves the temperature consistency of the surfaces of the vehicle-mounted battery monomer 5-1 and the vehicle-mounted battery monomer 5-7, and the vehicle-mounted battery monomer 5-2 and the vehicle-mounted battery monomer 5-8; 5-3 parts of vehicle-mounted battery monomers and 5-9 parts of vehicle-mounted battery monomers; 5-4 parts of vehicle-mounted battery monomers and 5-10 parts of vehicle-mounted battery monomers; 5-5 parts of vehicle-mounted battery monomers and 5-11 parts of vehicle-mounted battery monomers; the vehicle-mounted battery unit 5-6 and the vehicle-mounted battery unit 5-12 are respectively combined with the coupling cooling plate 6-2, the coupling cooling plate 6-3, the coupling cooling plate 6-4, the coupling cooling plate 6-5 and the coupling cooling plate 6-6 to generate the same operation effect. In the battery cooling module assembly, the heat conduction silica gel among the coupling cooling plates 6-1, the coupling cooling plates 6-2 and the coupling cooling plates 6-3 and the heat conduction silica gel among the coupling cooling plates 6-4, the coupling cooling plates 6-5 and the coupling cooling plates 6-6 are conducted through heat conduction, so that the temperature consistency among the coupling cooling plates 6-1, the coupling cooling plates 6-2, the coupling cooling plates 6-3 and the coupling cooling plates 6-4, the coupling cooling plates 6-5 and the coupling cooling plates 6-6 is improved, and the temperature consistency among the vehicle-mounted battery cells 5-1, the vehicle-mounted battery cells 5-2, the vehicle-mounted battery cells 5-3, the vehicle-mounted battery cells 5-7, the vehicle-mounted battery cells 5-8, the vehicle-mounted battery cells 5-5, the vehicle-mounted battery cells 5-6, the vehicle-mounted battery cells 5-10, the vehicle-mounted battery cells 5-11 and the vehicle-mounted battery cells 5-12 is improved. The longitudinal ventilating duct formed by the arched water tank 6-1-2 in the coupling cooling plate 6-1 increases the heat exchange area of air and the antifreeze solution 6-1-3, improves the heat exchange speed, enhances the heat dissipation effect, and the coupling cooling plate 6-2, the coupling cooling plate 6-3, the coupling cooling plate 6-4, the coupling cooling plate 6-5 and the coupling cooling plate 6-6 have the same operation effect, and the heated air brings heat out of the battery box from the air outlet 2-2-1 and the air outlet 2-2-2 of the battery box end cover 2.
The electronic control unit ECU8 monitors the air temperature flowing into and out of the battery box through the thermocouples 7-2, 7-1 and 7-3 arranged on the air inlet 2-3, the air outlet 2-2-1 and the air outlet 2-2 of the battery box end cover 2, and when the air temperature is higher, the electronic control unit ECU8 accelerates the air flow speed by increasing the rotating speed of the speed regulating fan 9, ensures the heat dissipation effect under different working conditions and simultaneously reduces the energy consumed by the speed regulating fan 9 as much as possible.
When the temperature of the vehicle-mounted battery monomer is too high, on one hand, the coupling cooling plates 6-1, 6-2, 6-3, 6-4, 6-5 and 6-6 are respectively provided with antifreeze in the arched water tank, and on the other hand, the low-density polyethylene/paraffin composite phase-change material filled in the battery box 1 can absorb the heat emitted by the battery by melting and absorbing heat, and the temperature is kept constant in the process, so that the high-temperature heat dissipation capacity of the battery box is enhanced; when the automobile stops running, on one hand, the coupling cooling plates 6-1, 6-2, 6-3, 6-4, 6-5 and 6-6 are respectively connected with the antifreeze with higher specific heat capacity in the arched water tank, so that the temperature of the battery pack can be delayed, on the other hand, the low-density polyethylene/paraffin composite phase-change material filled in the battery box body 1 can delay the temperature of the battery pack through solidification heat release, the low-temperature heat preservation capacity of the battery box is enhanced, and the energy utilization rate of the battery pack is improved.
Embodiment two:
the following describes in detail the implementation procedure of the invention applied to 16 vehicle-mounted battery cells with reference to the accompanying drawings:
as shown in fig. 2, 14 and 15, the invention is assembled with a vehicle-mounted battery monomer, is arranged on a vehicle body and is connected with an electronic control unit ECU8 of the vehicle, and the technical scheme is that the invention comprises a battery box body 1, a low-density polyethylene/paraffin composite phase-change material, a battery box end cover 2, a battery cooling module, an air inlet duct guide cover 3, an air outlet duct guide cover 4-1, an air outlet duct guide cover 4-2, a thermocouple 7-1, a thermocouple 7-2, a thermocouple 7-3 and a speed regulating fan 9;
as shown in fig. 2, 5, 6, 7, 10, 11, 12, 13, 15 and 16, the battery box 1 is a rectangular open shell of a double-layer shell, a cavity is arranged between two layers of the double-layer shell, and a phase change material injection hole 1-1 is arranged on the shell; the melted low-density polyethylene/paraffin composite phase-change material is injected into the cavity through the phase-change material injection hole 1-1 and is sealed by the plug 1-3 and the sealing ring 1-2; the battery box end cover 2 consists of a cover plate 2-1, an air inlet 2-3, an air outlet 2-2-1 and an air outlet 2-2-2, wherein the air inlet 2-3 is positioned in the middle of the cover plate 2-1, the air outlet 2-2-1 and the air outlet 2-2-2 are positioned at two sides of the air inlet 2-3, and the size of the cover plate 2-1 is matched with the size of an opening of the battery box body 1;
as shown in fig. 3, 4, 15, 16 and 17, the battery cooling module is formed by combining a coupling cooling plate 6-1 with a vehicle-mounted battery cell 5-1 and a vehicle-mounted battery cell 5-7; the coupling cooling plate 6-1 is formed by respectively sealing and fixing an upper heat collecting plate 6-1-1 and a lower heat collecting plate 6-1-2 on the upper surface and the lower surface of the bow-shaped water tank 6-1-2, and is matched with the sizes of the vehicle-mounted battery unit 5-1 and the vehicle-mounted battery unit 5-9, and the freezing-proof liquid 6-1-3 is poured into the bow-shaped water tank 6-1-2 and sealed by a plug 6-1-4; the bow-shaped water tanks 6-1-2 sealed by the upper heat collecting plate 6-1-1-1 and the lower heat collecting plate 6-1-1-2 form a plurality of longitudinal ventilation channels; the upper and lower heat collecting plates 6-1-1, 6-1-1-2 and the arched water tank 6-1-2 are made of metal materials; the upper surface and the lower surface of the coupling cooling plate 6-1 are respectively stuck with the vehicle-mounted battery monomers 5-1 and 5-9 by heat conducting silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-2 are respectively stuck with the vehicle-mounted battery monomers 5-2 and 5-10 by heat conduction silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-3 are respectively stuck with the vehicle-mounted battery monomers 5-3 and 5-11 by heat-conducting silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-4 are respectively stuck with the vehicle-mounted battery monomers 5-4 and 5-12 by heat conduction silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-5 are respectively stuck with the vehicle-mounted battery monomers 5-5 and 5-13 by heat conducting silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-6 are respectively stuck with the vehicle-mounted battery monomers 5-6 and 5-14 by heat conduction silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-7 are respectively stuck with the vehicle-mounted battery monomers 5-7 and 5-15 by heat conducting silica gel to form a battery cooling module; the upper surface and the lower surface of the coupling cooling plate 6-8 are respectively stuck with the vehicle-mounted battery monomers 5-8 and 5-16 by heat conducting silica gel to form a battery cooling module; the left and right sides of the coupling cooling plates 6-1, 6-2, 6-3 and 6-4 are bonded together by using heat-conducting silica gel to form a battery cooling module assembly; bonding the left side and the right side of the coupling cooling plates 6-5, 6-6, 6-7 and 6-8 together by using heat-conducting silica gel to form another battery cooling module assembly;
as shown in fig. 2, 15 and 16, two adjacent battery cooling module assemblies are combined, and are fixed and connected between the two battery cooling modules through an air inlet duct guide cover 3 for hot melt adhesive, and an air inlet channel is formed by the two battery cooling module assemblies and a corresponding longitudinal air duct; two air outlet duct guide covers 4-1 and 4-2 are respectively fixed and connected to the other two sides of the longitudinal air duct of the two groups of battery cooling module assemblies through hot melt adhesive, and respectively correspondingly form two air outlet channels; the two groups of battery cooling module assemblies are integrally installed into a battery box body 1 with the internal size matched with the battery cooling module assemblies after being combined; the battery box end cover 2 is arranged on the opening of the battery box body 1 and is sealed and fixed by hot melt adhesive; the air inlet 2-3 on the battery box end cover 2 is correspondingly and hermetically connected with the air inlet channel through hot melt adhesive, and the two air outlets 2-2-1 and 2-2-2 on the battery box end cover 2 are respectively and correspondingly and hermetically connected with the two air outlet channels through hot melt adhesive;
as shown in fig. 2, 14 and 15, a thermocouple 7-2 and a speed regulating fan 9 are installed on an air inlet 2-3 of a battery box end cover 2, a thermocouple 7-1 is installed on an air outlet 2-2-1, a thermocouple 7-3 is installed on the air outlet 2-2-2, the thermocouple 7-1, the thermocouple 7-2 and the thermocouple 7-3 are respectively connected with an Electronic Control Unit (ECU) 8, and the Electronic Control Unit (ECU) 8 is connected with the speed regulating fan 9 to control the rotating speed of the speed regulating fan 9.
The invention is applied to the operation process of 16 vehicle-mounted battery monomers:
during the running process of the automobile, the electronic control unit ECU8 conveys cold air into the air inlet duct guide cover 3 from the air inlet 2-3 on the battery box end cover 2 through the speed regulating fan 9, and then enters the air outlet duct guide cover 4-1 through the coupling cooling plate 6-1, the coupling cooling plate 6-2, the coupling cooling plate 6-3 and each longitudinal air duct in the coupling cooling plate 6-4; the air enters the air outlet duct guide cover 4-2 through the coupling cooling plates 6-5, the coupling cooling plates 6-6, the coupling cooling plates 6-7 and the longitudinal air ducts in the coupling cooling plates 6-8; finally, respectively flowing out from air outlets 2-2-1 and 2-2-2 on the battery box end cover 2;
the heat generated by the vehicle-mounted battery unit 5-1 and the vehicle-mounted battery unit 5-9 is conducted to the bow-shaped water tank 6-1-2 through the upper heat collecting plate 6-1-1 and the lower heat collecting plate 6-1-2 of the coupling cooling plate 6-1 respectively, the specific heat capacity of the antifreeze 6-1-3 in the bow-shaped water tank 6-1-2 is higher, and the heat generated by the vehicle-mounted battery unit 5-1 and the vehicle-mounted battery unit 5-9 can be effectively absorbed and the temperature rise is delayed. Meanwhile, the cooling liquid 6-1-3 enhances heat exchange through internal flow, and improves the temperature consistency of the surfaces of the vehicle-mounted battery monomer 5-1 and the vehicle-mounted battery monomer 5-9, and the vehicle-mounted battery monomer 5-2 and the vehicle-mounted battery monomer 5-10; 5-3 parts of vehicle-mounted battery monomers and 5-11 parts of vehicle-mounted battery monomers; 5-4 parts of vehicle-mounted battery monomers and 5-12 parts of vehicle-mounted battery monomers; 5-5 parts of vehicle-mounted battery monomers and 5-13 parts of vehicle-mounted battery monomers; 5-6 parts of vehicle-mounted battery monomers and 5-14 parts of vehicle-mounted battery monomers; 5-7 parts of vehicle-mounted battery monomers and 5-15 parts of vehicle-mounted battery monomers; the vehicle-mounted battery cells 5-8 and 5-16 are respectively combined with the coupling cooling plate 6-2, the coupling cooling plate 6-3, the coupling cooling plate 6-4, the coupling cooling plate 6-5, the coupling cooling plate 6-6, the coupling cooling plate 6-7 and the coupling cooling plate 6-8 to generate the same operation effect. In the battery cooling module assembly, the temperature consistency among the coupling cooling plates 6-1, the coupling cooling plates 6-2, the coupling cooling plates 6-3, the heat conduction silica gel among the coupling cooling plates 6-4 and the coupling cooling plates 6-5, the coupling cooling plates 6-6, the coupling cooling plates 6-7 and the heat conduction silica gel among the coupling cooling plates 6-8 is improved through heat conduction, so that the temperature consistency among the coupling cooling plates 6-1, the coupling cooling plates 6-2, the coupling cooling plates 6-3, the coupling cooling plates 6-4 and the coupling cooling plates 6-5, the coupling cooling plates 6-6, the coupling cooling plates 6-7 and the coupling cooling plates 6-8 is improved, and the temperature consistency among the vehicle-mounted battery cells 5-1, the vehicle-mounted battery cells 5-2, the vehicle-mounted battery cells 5-3, the vehicle-mounted battery cells 5-4, the vehicle-mounted battery cells 5-9, the vehicle-mounted battery cells 5-10, the vehicle-mounted battery cells 5-11, the vehicle-mounted battery cells 5-12, the vehicle-mounted battery cells 5-6, the vehicle-mounted battery cells 5-7, the vehicle-mounted battery cells 5-8, the vehicle-mounted battery cells 5-13 and the vehicle-mounted battery cells 5-14 are improved. The longitudinal ventilating duct formed by the arched water tank 6-1-2 in the coupling cooling plate 6-1 increases the heat exchange area of air and the antifreeze solution 6-1-3, improves the heat exchange speed, enhances the heat dissipation effect, and the coupling cooling plate 6-2, the coupling cooling plate 6-3, the coupling cooling plate 6-4, the coupling cooling plate 6-5, the coupling cooling plate 6-6, the coupling cooling plate 6-7 and the coupling cooling plate 6-8 have the same operation effect, and the heated air brings heat out of the battery box from the air outlet 2-2-1 and the air outlet 2-2-2 of the battery box end cover 2.
The electronic control unit ECU8 monitors the air temperature flowing into and out of the battery box through the thermocouples 7-2, 7-1 and 7-3 arranged on the air inlet 2-3, the air outlet 2-2-1 and the air outlet 2-2 of the battery box end cover 2, and when the air temperature is higher, the electronic control unit ECU8 accelerates the air flow speed by increasing the rotating speed of the speed regulating fan 9, ensures the heat dissipation effect under different working conditions and simultaneously reduces the energy consumed by the speed regulating fan 9 as much as possible.
When the temperature of the vehicle-mounted battery monomer is too high, on one hand, the coupling cooling plates 6-1, 6-2, 6-3, 6-4, 6-5, 6-6, 6-7 and 6-8 are capable of absorbing heat by antifreeze in the bow-shaped water tank, on the other hand, the low-density polyethylene/paraffin composite phase change material filled in the battery box 1 can absorb the heat emitted by the battery by melting and absorbing heat, and the temperature is kept constant in the process, so that the high-temperature heat dissipation capacity of the battery box is enhanced; when the automobile stops running, on one hand, the coupling cooling plates 6-1, 6-2, 6-3, 6-4, 6-5, 6-6, 6-7 and 6-8 of the bow-shaped water tanks with higher specific heat capacity can delay the temperature drop of the battery pack, and on the other hand, the low-density polyethylene/paraffin composite phase-change material filled in the battery box body 1 can delay the temperature drop of the battery pack through solidification heat release, thereby enhancing the low-temperature heat preservation capacity of the battery box and improving the energy utilization rate of the battery pack.
Claims (1)
1. The air and cooling liquid coupled electric automobile battery pack thermal management system is assembled with a vehicle-mounted battery monomer, is arranged on an automobile body, and is connected with an electronic control unit ECU of the automobile, and is characterized by comprising a battery box body, a phase change material, a battery box end cover, a battery cooling module, an air inlet duct guide cover, an air outlet duct guide cover, a thermocouple and a speed regulating fan;
the battery box body is a cuboid open shell of a double-layer shell, a cavity is arranged between two layers of the double-layer shell, and a phase change material injection hole is formed in the shell; the melted phase-change material is injected into the cavity through the phase-change material injection hole and is sealed by the plug and the sealing ring; the battery box end cover consists of a cover plate, an air inlet and an air outlet, the air inlet is positioned in the middle of the cover plate, the air outlet is positioned at two sides of the air inlet, and the size of the cover plate is matched with the size of an opening of the battery box body;
the battery cooling module is formed by combining a coupling cooling plate and a vehicle-mounted battery monomer; the coupling cooling plate is formed by respectively sealing and fixing an upper heat collecting plate and a lower heat collecting plate on the upper surface and the lower surface of the arched water tank, is matched with the size of a vehicle-mounted battery monomer, and is filled with antifreeze fluid and sealed by a plug; the arched water tank sealed by the upper and lower heat collecting plates forms a plurality of longitudinal ventilating ducts; the upper and lower heat collecting plates and the arched water tank are made of heat conducting materials; the upper surface and the lower surface of each coupling cooling plate are respectively stuck with a vehicle-mounted battery monomer by heat-conducting silica gel to form a battery cooling module; according to the number of the vehicle-mounted battery monomers, the number of the battery cooling modules is determined, and the left sides and the right sides of the coupling cooling plates of 3 or 4 battery cooling modules are bonded together by using heat-conducting silica gel to form a battery cooling module assembly;
the adjacent two groups of battery cooling module assemblies are combined, and are sealed and fixed by an air inlet duct guide cover and connected between the two groups of battery cooling modules, and an air inlet channel is formed by the two groups of battery cooling module assemblies and a corresponding longitudinal air duct; two air outlet duct guide covers are respectively and hermetically fixed and connected to the other two sides of the longitudinal ventilating duct of the two groups of battery cooling module assemblies, and respectively and correspondingly form two air outlet channels; the two groups of battery cooling module assemblies are integrally installed in a battery box body after being combined; the end cover of the battery box is fixedly arranged on the opening of the battery box body, an air inlet on the end cover of the battery box is correspondingly connected with the air inlet channel, and two air outlets on the end cover of the battery box are correspondingly connected with the two air outlet channels respectively;
a thermocouple and a speed regulating fan are arranged on an air inlet of an end cover of the battery box, a thermocouple is arranged on an air outlet, the thermocouple is connected with an ECU (electronic control unit) of the automobile, and the ECU is connected with the speed regulating fan and controls the rotating speed of the speed regulating fan.
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| CN209249567U (en) | 2018-12-30 | 2019-08-13 | 宁德时代新能源科技股份有限公司 | A kind of battery modules |
| CN110027445A (en) * | 2019-03-05 | 2019-07-19 | 安徽力高新能源技术有限公司 | A kind of heat management system and method for battery management system |
| CN111029682B (en) * | 2019-12-10 | 2022-09-16 | 华南农业大学 | Power battery heat radiation structure of electric automobile |
| KR20220163923A (en) * | 2020-04-02 | 2022-12-12 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Battery module assemblies, battery packs, and battery-powered devices |
| CN112582728A (en) * | 2020-12-03 | 2021-03-30 | 章春元 | Wind-liquid integrated thermal management battery system of electric motorcycle |
| CN112590622A (en) * | 2020-12-23 | 2021-04-02 | 杨文险 | Standardization method and system for power battery of electric automobile |
| CN114243159B (en) * | 2021-12-21 | 2023-08-08 | 广东工业大学 | Automobile power battery thermal management system based on distributed cooling |
| JP2024509489A (en) | 2022-02-21 | 2024-03-04 | 寧徳時代新能源科技股▲分▼有限公司 | Batteries, power consumption equipment, battery manufacturing methods and equipment |
| CN117438692A (en) * | 2022-07-15 | 2024-01-23 | 比亚迪股份有限公司 | Heat dissipation aviation baffle, battery support, battery pack, battery package, energy storage battery cabinet and energy storage system |
| CN116544562B (en) * | 2023-07-07 | 2023-10-13 | 泰州市海创新能源研究院有限公司 | Lithium ion battery pack thermal management device |
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