CN107845845B - Liquid cooling battery module - Google Patents
Liquid cooling battery module Download PDFInfo
- Publication number
- CN107845845B CN107845845B CN201711005143.1A CN201711005143A CN107845845B CN 107845845 B CN107845845 B CN 107845845B CN 201711005143 A CN201711005143 A CN 201711005143A CN 107845845 B CN107845845 B CN 107845845B
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- battery module
- liquid cooling
- heat
- plate
- pipe
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- 238000001816 cooling Methods 0.000 title claims abstract description 65
- 239000007788 liquid Substances 0.000 title claims abstract description 60
- 230000017525 heat dissipation Effects 0.000 claims abstract description 9
- 238000012856 packing Methods 0.000 claims description 33
- 238000003825 pressing Methods 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 230000000670 limiting effect Effects 0.000 claims description 21
- 238000005192 partition Methods 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000741 silica gel Substances 0.000 claims description 12
- 229910002027 silica gel Inorganic materials 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 239000000110 cooling liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01M10/62—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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
-
- 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a liquid cooling battery module, which comprises a battery module (100), wherein the battery module (100) comprises a plurality of battery cells (8) which are longitudinally arranged in parallel; the cross section of each battery cell (8) is rectangular; two L-shaped heat conduction pipes (11) are arranged outside the battery module (100), and the two heat conduction pipes (11) are distributed symmetrically in the center; -each of the heat conducting pipes (11) has a structure capable of transferring heat between the battery module (100); each heat conducting pipe (11) is contacted with one liquid cooling plate (6). The liquid cooling battery module disclosed by the invention has excellent performance, can effectively cool the temperature in the battery module, well solves the problem of heat dissipation of battery cells in the battery module, obviously reduces the use safety risk of the battery module, can form industrial scale, is beneficial to wide application, and has great production practice significance.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a liquid cooling battery module.
Background
At present, the current electric automobile industry has higher and higher requirements on the improvement of energy density, the size of battery cells is larger and larger, and as many battery cells as possible are required to be distributed in a limited installation space so as to improve the endurance mileage of the electric automobile; meanwhile, electric automobiles also require that the charging rate of battery cells is at least guaranteed to be more than 1 ℃. Therefore, under the condition of reducing the gap between adjacent battery cells and improving the charge and discharge multiplying power, how to ensure that the temperature of the battery module (i.e. the battery pack) after being lifted is within the working range of the battery cells becomes a difficult problem in the power battery industry and even the whole electric automobile industry.
In order to effectively reduce the temperature of the battery module after lifting, the current common mode is to add an air cooling device on the battery module, increase corresponding air inlets and air outlets on a battery module box body, and then ventilate to realize the cooling of the battery module. However, if the air inlet and the air outlet are added on the battery module box body, the protection level of the battery module box body cannot be ensured, and the use safety of the whole battery module is further reduced.
Therefore, there is an urgent need to develop a technology that can effectively cool the temperature in the battery module, solve the heat dissipation problem of the battery cells in the battery module, and reduce the safety risk of the battery module.
Disclosure of Invention
In view of the above, the invention aims to provide a liquid cooling battery module which has excellent performance, can effectively cool the temperature in the battery module, well solves the problem of heat dissipation of battery cells in the battery module, remarkably reduces the use safety risk of the battery module, can form industrial scale, is beneficial to wide application, and has great production practice significance.
Therefore, the invention provides a liquid cooling battery module, which comprises a battery module, wherein the battery module comprises a plurality of battery cells which are longitudinally arranged in parallel;
The cross section of each battery cell is rectangular;
two L-shaped heat conduction pipes are arranged outside the battery module, and the two heat conduction pipes are distributed symmetrically in the center;
a structure capable of transferring heat is arranged between each heat conduction pipe and the battery module;
each heat conducting pipe is contacted with one liquid cooling plate.
Wherein, every the heat conduction pipe with the structure that can transfer heat that has between the battery module specifically is:
the front side and the rear side of the battery module are respectively adhered with an end insulating sheet;
The left side surface and the right side surface of the battery module are respectively adhered with a side surface insulating sheet;
each side insulating sheet is internally provided with openings which are transversely distributed, and each opening is stuck with a heat-conducting silica gel pad;
an end plate is adhered to the outer side surface of each end insulating sheet;
the inner side surface of each heat conduction pipe is contacted with the outer surfaces of one heat conduction silica gel pad and one end plate;
The outer surface of each heat conducting pipe is fixedly connected with a pressing plate.
Wherein, the outer sides of the upper and lower ends of the two side insulating sheets and the outer sides of the upper and lower ends of the two end plates are respectively sleeved with a rectangular packing belt;
the outer sides of the upper end and the lower end of the two pressing plates and the outer sides of the upper end and the lower end of the two liquid cooling plates are respectively sleeved with a rectangular packing belt.
The battery module comprises a battery module, two liquid cooling plates, an end plate and a plurality of liquid cooling plates, wherein the two liquid cooling plates are positioned at the front end and the rear end of the battery module, and the upper end and the lower end of each end plate are correspondingly connected with the upper end and the lower end of one liquid cooling plate through bolts respectively.
And the contact surface between each heat conduction pipe and the liquid cooling plate is coated with heat conduction silicone grease.
The top of the liquid cooling plate is provided with a water inlet pipe and a water outlet pipe, a circulating water channel is arranged in the liquid cooling plate, and the left end and the right end of the circulating water channel are respectively communicated with the water inlet pipe and the water outlet pipe at the top of the liquid cooling plate.
The positions of the water inlet pipe and the water outlet pipe at the top of the liquid cooling plate are opposite.
The middle part of the outer surface of the end plate is provided with a concave heat conduction pipe limiting groove;
the upper end and the lower end of each end plate are respectively provided with a first packing belt limit groove;
The upper end and the lower end of the pressing plate are respectively provided with a second packing belt limit groove;
A groove is further formed in the middle of the inner side surface of each pressing plate and used for limiting and fixing the heat conduction pipe;
The front end and the rear end of the bottom of each pressing plate are respectively provided with an L-shaped ear part;
The left side and the right side of the end insulating sheet are provided with turned edges for covering the front edge and the rear edge of the side insulating sheet positioned at the left side and the right side of the battery module;
Polyimide films are wound on the outer surface of each battery cell;
any two adjacent battery cells are bonded together through structural adhesive.
The electrode lugs of a plurality of battery cells in the battery module are respectively welded with one busbar by laser;
The busbar is fixed on the top surface of an inner partition plate which is horizontally distributed, and an upper cover plate and a pressing strip pad are arranged right above the inner partition plate from top to bottom.
Compared with the prior art, the liquid cooling battery module provided by the invention has excellent performance, can effectively cool the temperature in the battery module, well solves the problem of heat dissipation of battery cells in the battery module, obviously reduces the use safety risk of the battery module, can form industrial scale, is beneficial to wide application, and has great production practice significance.
Drawings
Fig. 1 is a schematic diagram of a three-dimensional explosion structure of a liquid-cooled battery module according to the present invention;
fig. 2 is a schematic structural diagram of a plurality of batteries included in a battery module body in a liquid-cooled battery module according to the present invention;
Fig. 3 is a schematic structural view of an inner separator in a liquid-cooled battery module according to the present invention;
fig. 4 is a schematic structural diagram of an upper cover plate in a liquid-cooled battery module according to the present invention;
Fig. 5 is a schematic structural diagram of a heat conducting tube in a liquid-cooled battery module according to the present invention;
fig. 6 is a schematic structural diagram of a pressing plate in a liquid-cooled battery module according to the present invention;
fig. 7 is a schematic structural diagram of a liquid cooling plate in a liquid cooling battery module according to the present invention;
fig. 8 is a schematic structural diagram of an end plate in a liquid-cooled battery module according to the present invention;
fig. 9 is an enlarged schematic view of a structure of any one busbar in a liquid-cooled battery module according to the present invention;
fig. 10 is a schematic structural diagram of a side insulating sheet in a liquid-cooled battery module according to the present invention;
fig. 11 is a schematic structural diagram of a heat-conducting silica gel pad in a liquid-cooled battery module according to the present invention;
fig. 12 is a schematic view of a liquid-cooled battery module according to the present invention when the liquid-cooled battery module is assembled for the first time using a packing belt;
fig. 13 is a schematic diagram showing a liquid-cooled battery module assembled by using a packing belt for the second time according to the present invention;
in the figure, 1 is an upper cover plate, 2 is a layering pad, 3 is an inner partition plate, 4 is an end plate, 5 is an end insulating sheet, 6 is a liquid cooling plate, 7 is a packing belt, 8 is a battery cell, 9 is a polyimide film, 10 is a side insulating sheet, and 101 is an opening;
11 is a heat conduction pipe, 12 is a heat conduction silica gel pad, 13 is a pressing plate, 31 is a bus bar, 32 is a bus bar accommodating through hole, 40 is a heat conduction pipe limiting groove, 41 is a first packing belt limiting groove, 100 is a battery module, and 130 is a second packing belt limiting groove.
Detailed Description
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the drawings and embodiments.
Referring to fig. 1 to 13, the present invention provides a liquid-cooled battery module, comprising a battery module 100, wherein the battery module 100 comprises a plurality of battery cells 8 longitudinally arranged in parallel;
The cross section of each battery cell 8 is rectangular;
two L-shaped heat conduction pipes 11 are arranged outside the battery module 100, wherein the two heat conduction pipes 11 are symmetrically distributed in the center and have the same shape and size;
Each of the heat conduction pipes 11 has a structure capable of transferring heat between the battery module 100;
each heat conducting pipe 11 is in contact with one liquid cooling plate 6, and cooling liquid is arranged in each liquid cooling plate 6.
In the present invention, in particular, for the structure capable of transferring heat between each of the heat conduction pipes 11 and the battery module 100, it is preferable that:
The front and rear sides of the battery module 100 are respectively adhered with an end insulating sheet 5;
the left and right sides of the battery module 100 are respectively bonded with a side insulating sheet 10;
Each side insulating sheet 10 is internally provided with an opening 101 which is transversely distributed, and each opening 101 is stuck with a heat-conducting silica gel pad 12;
An end plate 4 is bonded to the outer side surface (i.e., the side away from the battery module 100) of each end insulating sheet 5;
The inner side surface of each heat conduction pipe 11 is in contact with the outer surfaces of one of the heat conduction silica gel pads 12 and one of the end plates 4.
In the present invention, the outer surface of each heat conduction pipe 11 is fixedly connected with one pressing plate 13.
In particular, referring to fig. 12, the outer sides of the upper and lower ends of the two side insulating sheets 10 and the outer sides of the upper and lower ends of the two end plates 4 are respectively sleeved with a rectangular packing belt 7.
In particular, referring to fig. 13, the outer sides of the upper and lower ends of the two pressing plates 13 and the outer sides of the upper and lower ends of the two liquid cooling plates 6 are respectively sleeved with a rectangular packing belt 7.
In particular, the packing belt 7 is preferably made of polyethylene terephthalate PET.
In the present invention, the contact surface between each heat conducting pipe 11 and the liquid cooling plate 6 is coated with heat conducting silicone grease. In particular, the thickness of the heat-conducting silicone grease is preferably less than or equal to 1 millimeter.
In the present invention, the thermal conductive silica gel pad 12 is preferably a thermal conductive silica gel pad having a compression ratio of 50%, and may be compressed by the pressing plate 13 outside the battery module 100, so that the thermal conductivity of the thermal conductive silica gel pad 12 is maximized.
In the present invention, the two liquid cooling plates 6 are located at the front and rear ends of the battery module 100, and the upper and lower ends of each end plate 4 are respectively connected with the upper and lower ends of one liquid cooling plate 6 by bolts. Therefore, the heat conducting pipe 11 is located at the position between the end plate 4 and the liquid cooling plate 6, under the extrusion action of the connecting bolt between the end plate 4 and the liquid cooling plate, the liquid cooling plate 6 can compress the heat conducting pipe 11, so that good contact between the liquid cooling pipe 6 and the heat conducting pipe 11 is ensured, a good heat conducting effect is achieved, and heat of the battery cell 8 in the battery module 100 can be timely transferred to the liquid cooling pipe 6 through the heat conducting pipe 11, so that a good cooling effect is achieved.
It should be noted that, in the concrete implementation, the top of the liquid cooling plate 6 is provided with a water inlet pipe and a water outlet pipe, a circulating water channel is arranged inside the liquid cooling plate 6, and the left and right ends of the circulating water channel are respectively communicated with the water inlet pipe and the water outlet pipe at the top of the liquid cooling plate 6.
In a specific implementation, the positions of the water inlet pipe and the water outlet pipe at the top of the two liquid cooling plates 6 at the front and rear ends of the battery module 100 are opposite, for example, the water inlet pipe of one liquid cooling plate 6 is located at the left side, the water outlet pipe is located at the right side, and the water outlet pipe of the other liquid cooling plate 6 is located at the left side, and the water inlet pipe is located at the right side. Therefore, it is possible to ensure uniform cooling effects at the front and rear ends of the battery module 100, thereby equalizing the overall temperature of the battery module 100.
The water inlet pipe and the water outlet pipe arranged at the top of the liquid cooling plate 6 are respectively communicated with an external device capable of providing flowing cooling liquid, for example, an external water pump and a heat exchanger through pipelines, and the pipelines are filled with the cooling liquid.
In particular, the cooling liquid is preferably a flowing flame-retardant cooling liquid.
In the present invention, in a specific implementation manner, the middle part of the outer surface of the end plate 4 is provided with a concave heat-conducting tube limiting groove 40, and the shape and the size of the heat-conducting tube limiting groove 40 are correspondingly matched with those of the heat-conducting tube 11 in the vertical direction, so that the heat-conducting tube limiting groove 40 can realize a good limiting effect on the heat-conducting tube 11, and the pressing plate 13 can press the L-shaped heat-conducting tube 11.
In the present invention, in a specific implementation, each of the upper and lower ends of the end plates 4 has a first packing belt limiting groove 41, and the first packing belt limiting groove 41 is used for limiting the movement of the packing belt 7.
In the embodiment of the invention, the pressing plate 13 has a sheet metal structure, and the upper and lower ends of the pressing plate 13 are respectively provided with a second packing belt limiting groove 130, and the second packing belt limiting groove 130 is used for limiting the movement of the packing belt 7;
A groove is further formed in the middle of the inner side surface of each pressing plate 13, and the groove is used for limiting and fixing the heat conduction pipe 11;
The front and rear ends of the bottom of each pressing plate 13 are respectively provided with an L-shaped ear part, so that the pressing plates 13 can be fixed on the battery module in an interference manner through the L-shaped ear parts on two sides.
In particular, the middle part of each pressing plate 13 has a plurality of heat dissipation holes 131 running along the vertical direction, and the shape of the heat dissipation holes is elliptical.
In a specific implementation of the present invention, the battery cell 8 is a square cell, and a positive electrode lug and a negative electrode lug are provided on the top of the battery cell 8.
In particular, the end insulating sheet 5 and the side insulating sheet 10 are preferably insulating sheets made of polycarbonate PC; the end insulating sheets 5 have turned-up edges at the left and right sides thereof for covering the front and rear edges of the side insulating sheets 10 at the left and right sides of the battery module 100.
In concrete implementation, the end plate 4 is an aluminum profile, and the inner partition plate 3 and the upper cover plate 1 are parts made of plastic materials.
In particular, the polyimide film (i.e., PI film) 9 is wound on the outer surface of each battery cell 8, so that good insulation between any two adjacent battery cells 8 is ensured, and meanwhile, effective outer surface protection is formed on the battery cells 8.
In particular implementation, any two adjacent battery cells 8 are bonded together through structural adhesive.
The structural adhesive has high strength (for example, the compression strength is more than 65Mpa, the steel-steel forward pulling bonding strength is more than 30Mpa, the shear strength is more than 18 Mpa), can bear larger load, is ageing-resistant, fatigue-resistant and corrosion-resistant, has stable performance in the expected service life, and is suitable for bearing strong structural member bonding. Specifically, the high-performance silicone structural adhesive and the neutral transparent silicone structural adhesive can be included.
In the present invention, referring to fig. 3 and fig. 9, in a specific implementation, the tabs of the battery cells 8 in the battery module 100 are respectively welded with one busbar 31 by laser;
each of the bus bars 31 is fixed on the top surface of one of the horizontally distributed inner partitions 3, specifically: a plurality of bus bar accommodating through holes 32 are distributed on the inner partition plate 3 at intervals, and each bus bar 31 is fixed in one bus bar accommodating through hole 32;
An upper cover plate 1 and a pressing strip pad 2 are arranged right above the inner partition plate 3 from top to bottom.
In the concrete implementation, the upper cover plate 1 and the inner partition plate 3 are clamped with each other through a buckle. Further, in order to more firmly connect the upper cover plate 1 and the inner partition plate 3, the upper cover plate 1 and the inner partition plate 3 are also screwed by self-tapping screws.
In particular, the inner partition plate 3 is provided with a buckle and a limiting column, and the busbar 31 and the inner partition plate 3 are clamped with each other through the buckle and are limited and fixed through the limiting column.
In particular implementation, the upper cover plate 1 is provided with a wiring groove for restraining a connection wire between the battery module 100 and external electric equipment (such as an electric automobile).
It should be noted that, referring to fig. 12 and 13 together, the present invention has a process of packing with a packing belt twice. The method comprises the following steps:
the first packing process is as follows: referring to fig. 12, a rectangular packing belt 7 is respectively sleeved outside the upper and lower ends of the two side insulating sheets 10 and outside the upper and lower ends of the two end plates 4.
The second packing process is as follows: referring to fig. 13, a rectangular packing belt 7 is respectively sleeved outside the upper and lower ends of the two pressing plates 13 and outside the upper and lower ends of the two liquid cooling plates 6. Therefore, good contact between the heat conduction pipe and the heat conduction silica gel pad on the side surface of the battery cell can be ensured by the packing belt locking mode.
Based on the above technical scheme, the liquid cooling battery module provided by the invention has the following beneficial technical effects:
1. after the side insulating sheets, the end insulating sheets and the bonding end plates are bonded after the battery module 100 is assembled, the first packing belt packing is directly carried out, so that packing locking is realized, and the assembly is simple and reliable;
2. The heat conducting pipe 11 is L-shaped, the L-shaped heat conducting pipe is arranged on the side surfaces of the plurality of battery cells 8 of the battery module 100, one end of the heat conducting pipe is contacted with the side surfaces of the battery cells to absorb heat generated by the battery cells during operation, and the other end of the heat conducting pipe is contacted with the liquid cooling plate 6, so that rapid heat conduction can be realized, and a good heat dissipation effect is achieved on the battery cells;
3. the L-shaped heat conduction pipe can be packed and locked for the second time by using the packing belt through the pressing plates at the left side and the right side, so that the heat conduction pipe is well contacted with the left side and the right side of the battery cell;
4. the liquid cooling plate 6 is arranged on the end plate 4 and is locked by bolts, so that the structure is simple and reliable;
5. The positions of the water inlet pipe and the water outlet pipe of the liquid cooling plate 6 are opposite, so that the temperature balance of the whole battery module can be effectively balanced;
6. The busbar 31 can be locked and fixed on the inner partition plate 3 through the functions of the limiting column and the buckle, and then is integrally assembled at the upper end of the battery module and fixed through laser welding;
7. The upper cover plate 1 is positioned by the buckle of the inner partition plate 3 and can be fixed on the inner partition plate by using self-tapping screws, and the structure is safe and reliable in a double fixing mode.
Therefore, in summary, compared with the prior art, the liquid cooling battery module provided by the invention has excellent performance, can effectively cool the temperature in the battery module, well solves the problem of heat dissipation of battery cells in the battery module, obviously reduces the use safety risk of the battery module, can form industrial scale, is beneficial to wide application, and has great production practice significance.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (5)
1. The liquid cooling battery module is characterized by comprising a battery module (100), wherein the battery module (100) comprises a plurality of battery cells (8) which are longitudinally arranged in parallel;
The cross section of each battery cell (8) is rectangular;
two L-shaped heat conduction pipes (11) are arranged outside the battery module (100), and the two heat conduction pipes (11) are distributed in a central symmetry mode;
-each of the heat conducting pipes (11) has a structure capable of transferring heat between the battery module (100);
Each heat conducting pipe (11) is contacted with one liquid cooling plate (6);
The structure capable of transferring heat between each heat conduction pipe (11) and the battery module (100) is specifically:
The front side and the rear side of the battery module (100) are respectively adhered with an end insulating sheet (5);
The left and right side surfaces of the battery module (100) are respectively adhered with a side surface insulating sheet (10);
Each side insulating sheet (10) is internally provided with an opening (101) which is transversely distributed, and each opening (101) is stuck with a heat-conducting silica gel pad (12);
an end plate (4) is adhered to the outer side surface of each end insulating sheet (5);
the inner side surface of each heat conducting pipe (11) is contacted with the outer surfaces of one heat conducting silica gel pad (12) and one end plate (4);
the outer surface of each heat conducting pipe (11) is fixedly connected with a pressing plate (13);
The outer sides of the upper end and the lower end of the two side insulating sheets (10) and the outer sides of the upper end and the lower end of the two end plates (4) are respectively sleeved with a rectangular packing belt (7);
The outer sides of the upper end and the lower end of the two pressing plates (13) and the outer sides of the upper end and the lower end of the two liquid cooling plates (6) are respectively sleeved with a rectangular packing belt (7);
The two liquid cooling plates (6) are positioned at the front end and the rear end of the battery module (100), and the upper end and the lower end of each end plate (4) are correspondingly connected with the upper end and the lower end of one liquid cooling plate (6) through bolts respectively;
the heat conducting pipe (11) is positioned between the end plate (4) and the liquid cooling plate (6);
under the extrusion action of bolts between the end plate (4) and the liquid cooling plate (6), the liquid cooling plate (6) compresses the heat conducting pipe (11) to ensure the close contact between the liquid cooling plate (6) and the heat conducting pipe (11);
the top of the liquid cooling plate (6) is provided with a water inlet pipe and a water outlet pipe, the inside of the liquid cooling plate (6) is provided with a circulating water channel, and the left end and the right end of the circulating water channel are respectively communicated with the water inlet pipe and the water outlet pipe at the top of the liquid cooling plate (6);
The positions of the water inlet pipe and the water outlet pipe at the top of the two liquid cooling plates (6) at the front end and the rear end of the battery module (100) are opposite.
2. The liquid-cooled battery module according to claim 1, wherein a contact surface between each of the heat-conducting pipes (11) and the liquid-cooling plate (6) is coated with heat-conducting silicone grease.
3. The liquid-cooled battery module according to claim 1, wherein the middle part of the outer surface of the end plate (4) is provided with a concave heat-conducting pipe limiting groove (40);
the upper end and the lower end of each end plate (4) are respectively provided with a first packing belt limit groove (41);
The upper end and the lower end of the pressing plate (13) are respectively provided with a second packing belt limit groove (130);
A groove is further formed in the middle of the inner side surface of each pressing plate (13) and used for limiting and fixing the heat conducting pipe (11);
The front end and the rear end of the bottom of each pressing plate (13) are respectively provided with an L-shaped ear part;
the middle part of each pressing plate (13) is provided with a plurality of heat dissipation holes (131) which run along the vertical direction.
4. The liquid-cooled battery module according to claim 1 or 2, wherein the left and right sides of the end insulating sheet (5) have turned-ups for covering the front and rear edges of the side insulating sheets (10) located on the left and right sides of the battery module (100);
the outer surface of each battery cell (8) is wound with a polyimide film (9);
Any two adjacent battery cells (8) are bonded together through structural adhesive.
5. The liquid-cooled battery module according to claim 1 or 2, wherein the tabs of a plurality of battery cells (8) in the battery module (100) are respectively laser-welded with one busbar (31);
the busbar (31) is fixed on the top surface of an inner partition board (3) which is horizontally distributed, and an upper cover board (1) and a pressing strip pad (2) are arranged right above the inner partition board (3) from top to bottom.
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| CN201711005143.1A CN107845845B (en) | 2017-10-25 | 2017-10-25 | Liquid cooling battery module |
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| CN107845845B true CN107845845B (en) | 2024-05-17 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108336451B (en) * | 2018-03-30 | 2024-03-26 | 深圳市元创时代科技有限公司 | Rechargeable battery and battery core thereof |
| CN108574077A (en) * | 2018-06-29 | 2018-09-25 | 爱驰汽车有限公司 | Battery pack |
| CN109524588A (en) * | 2018-11-20 | 2019-03-26 | 力神动力电池系统有限公司 | A kind of modularization liquid cooling battery modules |
| CN111564675B (en) * | 2020-04-15 | 2022-08-02 | 吉利汽车研究院（宁波）有限公司 | Battery thermal management system based on heat pipe and liquid cooling device |
| CN113140826B (en) * | 2021-04-19 | 2022-05-17 | 佛山市液冷时代科技有限公司 | Battery liquid cooling heat dissipation device based on paraffin-copper fiber phase change composite material |
| CN114530644A (en) * | 2021-12-06 | 2022-05-24 | 浙江零跑科技股份有限公司 | Liquid cooling battery module |
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Effective date of registration: 20220125 Address after: 266500 Minshan Road, Huangdao District, Qingdao, Shandong Applicant after: LISHEN (QINGDAO) NEW ENERGY CO.,LTD. Address before: 300384 Tianjin Xiqing District Binhai new and high technology Industrial Development Zone Huayuan Technology Park (outside the ring) Hai Tai Nan Road No. 38. Applicant before: LISHEN POWER BATTERY SYSTEMS Co.,Ltd. |
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