CN113921937A - Direct-cooling heat dissipation lithium battery module structure - Google Patents
Direct-cooling heat dissipation lithium battery module structure Download PDFInfo
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- CN113921937A CN113921937A CN202111030308.7A CN202111030308A CN113921937A CN 113921937 A CN113921937 A CN 113921937A CN 202111030308 A CN202111030308 A CN 202111030308A CN 113921937 A CN113921937 A CN 113921937A
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- Prior art keywords
- battery module
- heat dissipation
- heat
- direct
- wall
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 55
- 238000001816 cooling Methods 0.000 title claims abstract description 29
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 21
- 239000004744 fabric Substances 0.000 claims abstract description 53
- 229920001296 polysiloxane Polymers 0.000 claims description 34
- 239000004519 grease Substances 0.000 claims description 18
- 230000000712 assembly Effects 0.000 claims description 16
- 238000000429 assembly Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 230000002452 interceptive effect Effects 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000570 Cupronickel Inorganic materials 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
- 230000004888 barrier function Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- H01M10/65—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
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
-
- 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 discloses a direct-cooling heat dissipation lithium battery module structure, and relates to the field of batteries. The key points of the technical scheme comprise: a housing; the battery module is arranged in the shell; the heat conduction structure is arranged between the battery module and the inner wall of the shell and comprises a cloth base layer and a heat conduction layer; the fabric base layer comprises a forward air smooth surface and a reverse air slow surface, and the reverse air slow surface faces the inner wall of the shell. The invention adopts a direct cooling heat dissipation mode, and has the advantages of large heat dissipation area, quick heat dissipation and non-interactive external environment temperature.
Description
Technical Field
The invention relates to the field of batteries, in particular to a direct-cooling heat dissipation lithium battery module structure.
Background
Electric power assisted bicycle or electric motor car all use the battery as auxiliary power source, and there are two kinds of installation forms in the battery at present, and external and built-in respectively.
For the battery with built-in installation, how to quickly and effectively release the heat generated in the battery using process is a key problem needing to be researched and improved to be solved.
The existing chinese patent with publication number CN109244596A discloses a lithium battery with rapid heat dissipation, which includes a lithium battery core and a heat dissipation casing, wherein the heat dissipation casing is provided with heat dissipation fins at the outside and a cavity at the inside, and the cavity is provided with at least distributed pore channels on the upper surface and the lower surface of the heat dissipation casing, the pore channels are connected to a high-pressure circulating pump through a conduit, and a composite heat dissipation material is arranged in the cavity. I.e. in this patent a high pressure circulation pump is used to achieve active heat dissipation.
However, for the electric power-assisted bicycle or the electric vehicle, the battery is used as an auxiliary power source, if active heat dissipation is adopted, the endurance of the battery can be influenced on the one hand, and on the other hand, the structure is complex, the size is too large, the installation is inconvenient, and the cost is higher.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a direct-cooling heat dissipation lithium battery module structure which adopts a direct-cooling heat dissipation mode and has the advantages of large heat dissipation area, quick heat dissipation and non-interactive external environment temperature.
In order to achieve the purpose, the invention provides the following technical scheme:
a direct-cooling heat dissipation lithium battery module structure comprises:
a housing;
the battery module is arranged in the shell;
further comprising:
the heat conduction structure is arranged between the battery module and the inner wall of the shell and comprises a cloth base layer and a heat conduction layer;
the fabric base layer comprises a forward air smooth surface and a reverse air slow surface, and the reverse air slow surface faces the inner wall of the shell.
Further, the positive air smooth surface of the cloth substrate layer is in contact with the battery module, and the heat conduction layer is arranged between the reverse air slow-passing surface of the cloth substrate layer and the inner wall of the shell.
Further, the heat conducting layer is a heat conducting silicone layer, and the cloth base layer and the heat conducting silicone layer are laminated into a whole to form a cloth-based heat conducting silicone strip or a cloth-based heat conducting silicone sheet.
Further, the outer wall of the shell is provided with a heat dissipation groove or a heat dissipation rib opposite to the heat conduction structure.
Further, the battery module includes a plurality of battery cell assemblies arranged in a stack, the battery cell assemblies including a heat conductive sheet in contact with the heat conductive structure.
Further, the heat-conducting sheet is arranged on the laminated contact surface of the battery unit assembly and extends to the side wall of the battery unit assembly; the part of the heat conducting sheet extending to the side wall of the battery unit assembly is in contact with the heat conducting structure.
Further, the shell comprises a box body and a side cover plate, and the side cover plate is connected with the box body through a fastener; and the other side of the heat conducting structure in contact with the heat conducting fins is in contact with the inner wall of the side cover plate.
Further, a sealing ring is arranged at the joint of the box body and the outer wall of the side cover plate.
Furthermore, the battery module comprises a battery control board positioned at the end part of the battery module, and an MOS (metal oxide semiconductor) tube is arranged on the battery control board; the battery control board is provided with the heat conduction structure contacted with the MOS tube.
Further, the inner wall of the shell is provided with a heat conducting part in an extending mode, and the heat conducting part is in contact with the heat conducting structure on the battery control board.
In conclusion, the invention has the following beneficial effects:
the cloth base layer and the heat conduction layer are combined to form a heat conduction structure, so that heat generated by the battery module can be smoothly transmitted to the external environment through the heat conduction sheet, the heat conduction structure and the shell, and quick heat dissipation is realized; meanwhile, the fabric base layer can prevent the reverse transmission of the external environment temperature to the battery module, so that the heat dissipation continuity and the cooling effect of the battery module are improved, and the service life of the battery module is prolonged; the heat conduction structure is arranged between the battery module and the inner wall of the shell, direct cooling and heat dissipation are achieved, the electric quantity of the battery module does not need to be consumed additionally, the structure is simple, the size is small, and the heat conduction structure is convenient to install on electric power-assisted bicycles, electric vehicles or electric motorcycles and other vehicles.
Drawings
FIG. 1 is a schematic diagram illustrating an overall structure of a direct-cooling heat dissipation lithium battery module according to an embodiment;
FIG. 2 is a schematic structural diagram of a direct cooling lithium battery module according to an embodiment;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic structural view of an end cap in an embodiment;
fig. 5 is an exploded view of the battery module according to the embodiment;
FIG. 6 is a schematic structural diagram of a battery module according to an embodiment;
fig. 7 is a schematic structural diagram of a battery cell assembly in an embodiment.
In the figure: 11. a box body; 111. a bending part; 112. a connecting portion; 12. a side cover plate; 121. a heat-dissipating rib; 13. an end cap; 131. a heat dissipation groove; 132. an insertion section; 133. a heat conducting portion; 2. a socket; 3. a handle; 4. a seal ring; 51. fixing the substrate; 52. a battery cell assembly; 521. a battery cell bracket; 522. soft-packaged battery cells; 523. an electrode plate; 524. a wiring card slot; 525. a heat conductive sheet; 53. fixing a bracket; 541. a long screw; 542. a nut; 543. an internal threaded bolt; 55. an insulating plate; 56. a battery control board; 57. an MOS tube; 58. a nickel sheet; 59. a cushion pad; 61. cloth-based heat-conducting silicone sheets; 62. cloth-based heat-conducting silicone strips.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example (b):
a direct cooling heat dissipation lithium battery module structure refers to fig. 1, fig. 2 and fig. 5, and comprises a shell, wherein a battery module is arranged in the shell; in the embodiment, a heat conduction structure is arranged between the battery module and the inner wall of the shell, and the heat conduction structure comprises a cloth base layer and a heat conduction layer; the fabric base layer comprises a forward air smooth surface and a reverse air slow-passing surface, and the reverse air slow-passing surface faces to the inner wall of the shell; the cloth substrate in the embodiment belongs to the prior art, and has directionality, namely, the forward direction can penetrate through nanoscale air molecules or water molecules and the like without barriers, and the reverse direction slows down the circulation of the air molecules; the cloth base layer and the heat conduction layer are combined to form a heat conduction structure, so that heat generated by the battery module can be smoothly transmitted to the external environment through the heat conduction structure and the shell, and quick heat dissipation is realized; meanwhile, the fabric base layer can prevent the reverse transmission of the external environment temperature to the battery module, so that the heat dissipation continuity and the cooling effect of the battery module are improved, and the service life of the battery module is prolonged; the heat conduction structure sets up between battery module and shell inner wall in this embodiment, realizes direct cooling, then does not need additionally to consume the electric quantity of battery module, and simple structure, and the volume is less, is convenient for install on vehicles such as electric bicycle, electric motor car or electric motorcycle car.
Referring to fig. 1, 2 and 5, preferably, in the present embodiment, the forward air-permeable surface of the fabric base layer is in contact with the battery module, and the heat-conducting layer is disposed between the reverse air-permeable surface of the fabric base layer and the inner wall of the housing; the heat conducting layer is arranged between the reverse air slow-passing surface of the cloth substrate and the inner wall of the shell, so that the blocking effect of the cloth substrate on the external environment temperature can be further improved, and the cooling and heat dissipation effects are improved; specifically, in the present embodiment, the heat conducting layer is a heat conducting silicone layer, and the cloth base layer and the heat conducting silicone layer are laminated into a whole to form the cloth-based heat conducting silicone strip 62 or the cloth-based heat conducting silicone sheet 61; the cloth base layer and the heat-conducting silicone grease layer are laminated into a whole, so that on one hand, the blocking effect of the cloth base layer on the external environment temperature can be further improved, on the other hand, the tear resistance of the heat-conducting silicone grease layer can be enhanced, and meanwhile, the number of parts can be reduced, and the installation and management are convenient; preferably, cloth base heat conduction silicone grease strip 62 or cloth base heat conduction silicone grease piece 61 paste on battery module in this embodiment, paste the face and be the positive air of cloth base layer and follow the face for the heat that battery module produced can be passed through cloth base heat conduction silicone grease strip 62 or cloth base heat conduction silicone grease piece 61 and is gone out fast.
Referring to fig. 5 and 7, the battery module in the present embodiment includes a plurality of battery cell assemblies 52 arranged in a stack, the battery cell assemblies 52 including a heat conductive sheet 525 in contact with a heat conductive structure; the heat conducting sheet 525 is disposed on the stacking contact surface of the battery cell assembly 52 and extends to the side wall of the battery cell assembly 52, and the portion of the heat conducting sheet 525 extending to the side wall of the battery cell assembly 52 is in contact with the heat conducting structure; after the battery cell assemblies 52 are stacked, the adjacent battery cell assemblies 52 are contacted with each other through the heat conducting sheet 525, and the heat conducting sheet 525 is contacted with the heat conducting structure to form a heat dissipation path from the heat conducting sheet 525 and the heat conducting structure to the housing, so that heat generated by the battery module is transferred from inside to outside.
Referring to fig. 5 and 7, in the present embodiment, the fabric-based thermal grease sheets 61 are adhered to two sides of the battery module, and the fabric-based thermal grease sheets 61 contact with the thermal conductive sheets 525 on all the battery cell assemblies 52, so as to form a large heat dissipation area, which is beneficial to realizing rapid heat dissipation.
Referring to fig. 7, in the present embodiment, the battery unit assembly 52 includes a battery cell support 521, two soft-package battery cells 522 are disposed in the battery cell support 521, and two ends of the battery cell support 521 are both provided with electrode plates 523; the positive electrode tabs of the two soft package battery cells 522 are welded on one electrode plate 523, and the negative electrode tabs are welded above the other electrode plate 523; the electrode plate 523 is preferably made of copper nickel plating material, and in this embodiment, the electrode plate 523 and the battery cell support 521 are fixed by a buckle, so that the installation is convenient; in this embodiment, battery unit 52 includes two conducting strips 525, arranges in both sides, respectively with two laminate polymer core 522 contacts, and the parcel formula structure that two conducting strips 525 formed can play the safety protection effect to laminate polymer core 522 on the one hand, and on the other hand plays the heat conduction effect, and area of contact is big moreover, is favorable to realizing fast heat dissipation.
Referring to fig. 5 and 7, in the present embodiment, the heat conducting sheet 525 is preferably an ultra-thin aluminum foil having a wall thickness of about 0.3mm, and the aluminum alloy has the advantages of the heat conducting block and the heat dissipating block and can rapidly transfer heat; in the embodiment, the heat conducting fin 525 is U-shaped, and the side plate part of the heat conducting fin 525 is fixed with the battery cell support 521 through a buckle, so that the connection stability of the heat conducting fin 525 and the battery cell support 521 is ensured, and the heat conducting fin is convenient to install; the side plate part of the heat conducting sheet 525 is contacted with the cloth-based heat conducting silicone sheet 61 to realize heat transfer; further, be provided with two-sided heat conduction glues between conducting strip 525 and the soft-packaged electrical core 522 in this embodiment, then can bond conducting strip 525 and soft-packaged electrical core 522 firmly on the one hand, and on the other hand is favorable to realizing the heat transfer between soft-packaged electrical core 522 and conducting strip 525.
Referring to fig. 5 and 7, in the embodiment, a wiring clamping groove 524 is formed in the end portion of the battery cell support 521, and the battery module is conveniently wired through the wiring clamping groove 524, so that the wiring harness is reasonably arranged and is orderly routed, and the wiring harness can be effectively prevented from being popped out; after the battery unit assemblies 52 are stacked, the battery unit assemblies 52 which need to be connected in series are connected through the nickel sheet 58, preferably, the welded nickel sheet 58 is arched in the embodiment, so that a buffering effect is achieved, tearing of high-frequency vibration to welding points can be reduced, disconnection of welding positions of the nickel sheet 58 is avoided, and safety and reliability are improved.
Referring to fig. 5 and 7, specifically, the battery module in the present embodiment includes a fixing substrate 51 and a fixing bracket 53, the fixing substrate 51 and the fixing bracket 53 sandwiching a plurality of battery cell assemblies 52 arranged in a stack; wherein, the fixing substrate 51, the plurality of battery unit assemblies 52 and the fixing bracket 53 are connected by a fastening assembly; in this embodiment, the fastening assembly includes a long screw 541 and a nut 542, the long screw 541 penetrates through the fixing substrate 51, sequentially penetrates through the cell supports 521 of the plurality of battery cell assemblies 52, and then penetrates out of the fixing support 53, and the nut 542 is screwed on the long screw 541 and contacts with the fixing support 53, so that the fixing substrate 51, the plurality of battery cell assemblies 52 and the fixing support 53 can be connected into a whole; in the present embodiment, the insulating plate 55 is provided between the fixing bracket 53 and the battery cell assembly 52, so that safety can be improved; in other alternative embodiments, the plurality of battery cell assemblies 52 arranged in a stacked manner may be connected in other manners, and are not limited herein.
Referring to fig. 5, the battery module further includes a battery control board 56 at an end portion thereof, the battery control board 56 is provided with an MOS transistor 57, and the battery control board 56 is provided with a heat conducting structure contacting with the MOS transistor 57; specifically, in the present embodiment, the battery control board 56 is mounted on the fixing bracket 53 through a bolt, and two rows of MOS transistors 57 are disposed on the battery control board 56; the heat conduction structure is cloth-based heat conduction silicone grease strips 62, the cloth-based heat conduction silicone grease strips 62 are adhered to the roots of pins of the MOS tubes 57, the two rows of the MOS tubes 57 have four rows of pins, and the three cloth-based heat conduction silicone grease strips 62 are adopted to realize the full coverage of all the pins; with cloth base heat conduction silicone grease strip 62 bonding in MOS pipe 57's pin root, then the heat that MOS pipe 57 produced can be passed away through cloth base heat conduction silicone grease strip 62 fast, realizes cooling to increase of service life.
Referring to fig. 1, in particular, the housing in this embodiment includes a box body 11, two side cover plates 12, and an end cover 13; the side cover plate 12 closes the side opening of the box body 11, and the end cover 13 closes the end opening of the box body 11, so that a closed cavity is formed in the shell and used for installing a battery module; the end cover 13 is provided with a socket 2 for charging or discharging electricity, and the end cover 13 is provided with a handle 3, so that the lifting is convenient.
Referring to fig. 1 to 6, in the present embodiment, a plurality of buffer washers 59 are attached to the end surface of the fixing substrate 51, and after the battery module is placed in the case 11, the buffer washers 59 contact the inner bottom wall of the case 11, thereby improving the buffering function; in the embodiment, the fixing bracket 53 is provided with the bolt connected with the side cover plate 12 in a penetrating way, so that the battery module is connected with the shell, and the stability of the battery module is improved; when the end cover 13 is installed, the end part of the long screw 541 penetrates into the end cover 13, and then the internal thread bolt 543 matched with the long screw 541 is screwed in from the outer side of the end cover 13, so that the connection between the end cover 13 and the box body 11 can be realized, the overall stability can be improved, the number of parts is reduced, and the installation is convenient; furthermore, the inner end surface of the end cover 13 is provided with an embedded part 132 matched with the box body 11, and the embedded part 132 is matched with the box body 11, so that on one hand, the connection stability of the end cover 13 and the box body 11 can be improved, and on the other hand, the sealing performance can be improved; of course, in other alternative embodiments, the end cover 13 and the box 11 may be connected in other manners, and are not limited herein.
Referring to fig. 1 to 5, the outer wall of the housing is provided with a heat dissipation groove or a heat dissipation rib opposite to the heat conduction structure; specifically, in the present embodiment, the inner side wall of the side cover plate 12 contacts the fabric-based heat-conducting silicone sheet 61, and the outer side wall of the side cover plate 12 is provided with the heat-dissipating ribs 121, so that the heat-dissipating ribs 121 can increase the heat-dissipating area of the side cover plate 12, which is beneficial to quickly transferring heat to the external environment and improving the heat-dissipating and cooling effects; in this embodiment, three heat conducting portions 133 respectively contacting with the fabric base heat conducting silicone strips 62 are extended from the inner end wall of the end cover 13, and heat dissipation grooves 131 are arranged on the outer end wall of the end cover 13; the heat of the cloth-based heat-conducting silicone grease strips 62 is transferred to the end cover 13 through the heat-conducting parts 133, and the heat-radiating grooves 131 on the outer side wall of the end cover 13 can increase the heat-radiating area, so that the heat can be rapidly transferred to the external environment, and the heat-radiating and cooling effects are improved; meanwhile, the heat conducting part 133 is pressed on the cloth-based heat conducting silicone strips 62, which can also improve the stability of the battery control board 56; of course, in other alternative embodiments, other structures can be used to increase the heat dissipation area, and are not limited to the ribs or the grooves, and are not limited herein.
Referring to fig. 1 to 3, in the present embodiment, the side cover plate 12 is connected to the box body 11 by a fastener, and the sealing ring 4 is disposed at the joint of the outer walls of the box body 11 and the side cover plate 12, so that the sealing performance can be improved; specifically, a bent portion 111 and a connecting portion 112 connected to the bent portion 111 are formed at a side plate of the case 11, and the connecting portion 112 is located inside the side cover plate 12, so that the sealing performance can be improved; the inner side wall of the connecting part 112 is provided with a press riveting nut, and a bolt connected with the press riveting nut is penetrated from the outer side of the side cover plate 12, so that the side cover plate 12 and the box body 11 can be firmly connected; a groove is formed between the bending part 111 and the end face of the side cover plate 12, sealant is filled in the groove, and the sealing ring 4 is formed after the sealant is dried, so that the sealing effect can be improved; the sealant can be automatically dispensed by a dispenser, so that the production efficiency is improved; of course, in other alternative embodiments, the sealing ring 4 may also take other structural forms, such as being sandwiched between the side cover plate 12 and the connecting portion 112, which is not limited herein.
Referring to fig. 1, 2 and 5, in this embodiment, after the battery module is installed in the case 11, the side cover plate 12 is installed, so that the side cover plate 12 is in close contact with the heat conducting silicone layer of the fabric-based heat conducting silicone sheet 61, and the soft heat conducting silicone layer is tightly filled between the side cover plate 12 and the battery module under the stress condition, thereby improving the heat transfer efficiency and the heat dissipation effect; in this embodiment, the side cover plate 12 is used as an independent mounting member, on one hand, the profile stretching process is convenient to adopt, the heat dissipation convex edge 121 is directly formed on the side cover plate 12, the heat dissipation area is increased, on the other hand, the pressure can be applied to the cloth-based heat conduction silicone sheet 61 during the mounting process, the heat transfer efficiency is improved, and therefore the heat dissipation effect is improved.
Claims (10)
1. A direct-cooling heat dissipation lithium battery module structure comprises:
a housing;
the battery module is arranged in the shell;
it is characterized by also comprising:
the heat conduction structure is arranged between the battery module and the inner wall of the shell and comprises a cloth base layer and a heat conduction layer;
the fabric base layer comprises a forward air smooth surface and a reverse air slow surface, and the reverse air slow surface faces the inner wall of the shell.
2. The direct-cooling heat dissipation lithium battery module structure as recited in claim 1, wherein: the positive air of cloth basic unit is in the same direction as logical face with the battery module contact, the heat-conducting layer set up in between the reverse air of cloth basic unit slowly leads to face and the shell inner wall.
3. The direct-cooling heat dissipation lithium battery module structure as recited in claim 1, wherein: the heat conduction layer is a heat conduction silicone grease layer, and the cloth base layer and the heat conduction silicone grease layer are laminated into a whole to form a cloth base heat conduction silicone grease strip or a cloth base heat conduction silicone grease sheet.
4. The direct-cooling heat dissipation lithium battery module structure as recited in claim 1, wherein: and the outer wall of the shell is provided with a heat dissipation groove or a heat dissipation convex edge opposite to the heat conduction structure.
5. The direct-cooling heat dissipation lithium battery module structure as recited in claim 1, wherein: the battery module includes a plurality of battery cell assemblies arranged in a stack, the battery cell assemblies including a heat conductive sheet in contact with the heat conductive structure.
6. The direct-cooling heat dissipation lithium battery module structure as recited in claim 5, wherein: the heat conducting sheet is arranged on the laminated contact surface of the battery unit assembly and extends to the side wall of the battery unit assembly; the part of the heat conducting sheet extending to the side wall of the battery unit assembly is in contact with the heat conducting structure.
7. The direct-cooling heat dissipation lithium battery module structure as recited in claim 5, wherein: the shell comprises a box body and a side cover plate, and the side cover plate is connected with the box body through a fastener; and the other side of the heat conducting structure in contact with the heat conducting fins is in contact with the inner wall of the side cover plate.
8. The direct-cooling heat dissipation lithium battery module structure as recited in claim 7, wherein: and a sealing ring is arranged at the joint of the outer wall of the box body and the outer wall of the side cover plate.
9. The direct-cooling heat dissipation lithium battery module structure as recited in claim 1, wherein: the battery module comprises a battery control board positioned at the end part of the battery module, and an MOS (metal oxide semiconductor) tube is arranged on the battery control board; the battery control board is provided with the heat conduction structure contacted with the MOS tube.
10. The direct-cooling heat dissipation lithium battery module structure as recited in claim 9, wherein: and the inner wall of the shell is provided with a heat conduction part in contact with the heat conduction structure on the battery control panel in an extending manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111030308.7A CN113921937B (en) | 2021-09-03 | 2021-09-03 | Direct cooling heat dissipation lithium battery module structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111030308.7A CN113921937B (en) | 2021-09-03 | 2021-09-03 | Direct cooling heat dissipation lithium battery module structure |
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| CN113921937A true CN113921937A (en) | 2022-01-11 |
| CN113921937B CN113921937B (en) | 2024-03-15 |
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