CN113224435B - High specific energy battery pack - Google Patents
High specific energy battery pack Download PDFInfo
- Publication number
- CN113224435B CN113224435B CN202110467267.1A CN202110467267A CN113224435B CN 113224435 B CN113224435 B CN 113224435B CN 202110467267 A CN202110467267 A CN 202110467267A CN 113224435 B CN113224435 B CN 113224435B
- Authority
- CN
- China
- Prior art keywords
- battery
- cover plate
- battery module
- box body
- high specific
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000741 silica gel Substances 0.000 claims abstract description 15
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 22
- 239000004033 plastic Substances 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 8
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 125000006850 spacer group Chemical group 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
- H01M10/615—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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
-
- 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)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a high specific energy battery pack, which comprises a main box body; a plurality of battery modules arranged in parallel are arranged in the main box body; the top of the main box body is fixedly provided with an upper box cover; a first heat-conducting silica gel pad is arranged between the contact surface of each battery module and the bottom of the main box body; a second heat-conducting silica gel pad is respectively arranged between each side face of each battery module and the contact face of the side wall of the main box body; each battery module comprises a battery module main body; the front and rear sides of the battery module main body are respectively and vertically provided with an outer cover plate; an upper cover plate and a lower cover plate are respectively arranged below the battery module main body; the upper cover plate and the lower cover plate are respectively provided with a cover plate insulating sheet between the upper cover plate and the battery module main body; the left side and the right side of the battery module main body are respectively and vertically provided with a heating plate; and a heat conduction silica gel sheet is arranged at the position between each heating sheet and the battery module main body. The invention can improve the overall space utilization rate of the box body under the condition of ensuring the strength of the box body.
Description
Technical Field
The invention relates to the technical field of battery packs, in particular to a high specific energy battery pack.
Background
The current electric automobile trade, the promotion requirement to battery package energy density is higher and higher, and current design, most seek light raw and other materials, realize the reduction of battery package overall weight, and then realize the promotion of whole energy density.
However, when the weight is reduced and a novel material is selected, a plurality of safety accidents caused by insufficient strength of the box body also occur in the market. Under the condition that the strength and the volume of the box body are unchanged, the space in the box body is utilized as effectively as possible, and the method becomes a difficult problem in the current research.
Disclosure of Invention
The invention aims at overcoming the technical defects existing in the prior art and providing a high specific energy battery pack.
To this end, the present invention provides a high specific energy battery pack comprising an open-topped, hollow main tank;
a plurality of battery modules arranged in parallel are arranged in the main box body;
An upper box cover is fixedly arranged at the top of the main box body;
a heat-conducting silica gel pad is arranged between the contact surface of each battery module and the bottom of the main box body;
Wherein each battery module comprises a battery module main body;
The battery module main body comprises four battery core combinations, and each battery core combination comprises a plurality of battery cores which are stacked up and down;
The outer surface of each cell is wound with a PI film;
a PC (personal computer) sheet is placed between any two adjacent battery cells;
The battery cell comprises two battery cell combinations positioned in front, wherein the lug setting surface of each battery cell is positioned at the front side of each battery cell combination; the two battery cell combinations are positioned at the rear, and the lug setting surfaces of the battery cells are positioned at the rear side of the battery cell combinations;
Wherein, the front and back sides of the battery module main body are respectively and vertically provided with an outer cover plate;
Wherein, the lower part of the battery module main body is respectively provided with an upper cover plate and a lower cover plate;
the upper cover plate and the lower cover plate are respectively provided with a cover plate insulating sheet between the upper cover plate and the battery module main body;
wherein, the left and right sides of the battery module main body are respectively and vertically provided with a heating plate;
a heat conduction silica gel sheet is arranged at the position between each heating sheet and the battery module main body;
For each battery module, two ends of the heating plate are respectively provided with a vertically-through module long screw hole site;
The long screw hole position of each module is fixedly connected with the supporting beam fixedly arranged on the inner side of the bottom of the main box body through a long screw.
Preferably, the front and rear sides of the battery module body, and the position between each outer cover plate, are also provided with inner partition plates;
Each inner partition board and the position between the adjacent outer cover boards are also respectively provided with a battery cell group busbar;
the battery cell group busbar positioned in front is also connected with the PCB acquisition board;
the wiring harness of the PCB acquisition board is embedded into the wire groove arranged on the inner partition board.
Preferably, for each battery module, two plastic cover plates are arranged above the upper cover plate at intervals;
a bridging aluminum row is arranged below each plastic cover plate;
And the two ends of the bridging aluminum row are respectively connected with the adjacent cell grouping bus bars.
Preferably, the bridging aluminum rows are U-shaped in shape.
Preferably, a bottom plastic partition plate is arranged below the bridging aluminum row;
The bridging aluminum row is fixedly connected with the upper cover plate through a first fixing screw penetrating through the bottom plastic partition plate.
Preferably, the upper and lower ends of the outer cover plate are connected to adjacent ends of the upper and lower cover plates, respectively, by second fastening screws.
Preferably, the box girder further comprises a plurality of box girders;
And a plurality of long screws positioned on the same transverse straight line penetrate through the reserved through holes on the same box body pressing beam.
Preferably, the heating sheet is a PTC heating sheet;
And a PC sheet without back adhesive is arranged between any two adjacent battery cores.
Preferably, the battery pack further comprises an LMU acquisition board, and the LMU acquisition board is connected with the PCB acquisition board on each battery module and the communication port on the main box body through wiring harnesses.
Preferably, a plurality of lifting lugs are fixedly arranged on the left side and the right side of the main box body respectively.
Compared with the prior art, the high specific energy battery pack provided by the invention has the advantages that the structural design is scientific, the overall space utilization rate of the box body can be improved under the condition that the strength of the box body is ensured, the market application prospect of products of battery manufacturers can be improved, and the high specific energy battery pack has great practical significance.
Through inspection, the battery pack provided by the invention has the advantages that the overall structural strength of the box body is high, the sealing waterproof performance is good, the level requirement above IP67 can be met, meanwhile, the compact frame type module design improves the overall space utilization rate of the box body, and the standard modularized module design has interchangeability and foolproof effect, so that the battery pack is a real safe and reliable battery pack with high specific energy.
Drawings
Fig. 1 is a cell layout diagram of any one of battery modules in a high specific energy battery pack provided by the invention;
fig. 2 is a schematic diagram of a group of any one of battery modules in the high specific energy battery pack according to the present invention;
fig. 3 is an exploded view of any one of the battery modules in the high specific energy battery pack according to the present invention;
FIG. 4 is an exploded view of a high specific energy battery pack according to the present invention;
fig. 5 is a schematic diagram showing the alternate installation of battery modules in a high specific energy battery pack according to the present invention;
fig. 6 is a schematic view of heat dissipation of a battery module in a case in a high specific energy battery pack according to the present invention;
FIG. 7 is a schematic diagram of the installation and data collection of a battery module busbar in a high specific energy battery pack according to the present invention;
Fig. 8 is a schematic view showing the fixing of the battery module in the high specific energy battery pack according to the present invention.
Detailed Description
In order that the manner in which the application is carried out will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not limiting of the application. It should be further noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It should be noted that, in the description of the present application, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
In addition, it should be noted that, in the description of the present application, unless explicitly specified and limited otherwise, the term "mounted" and the like should be construed broadly, and may be fixed or removable, for example.
The specific meaning of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 to 8, the present invention provides a high specific energy battery pack comprising a hollow main case 1 having an open top;
a plurality of battery modules 2 arranged in parallel are arranged in the main box body 1;
an upper case cover 3 is fixedly arranged on the top of the main case body 1.
In the present invention, in particular, a thermal conductive silica gel pad 101 is disposed between the contact surface of each battery module 2 and the bottom of the main case 1.
In the present invention, referring to fig. 3, each battery module 2, including a battery module body;
the battery module body comprises four battery cell combinations, and each battery cell combination comprises a plurality of battery cells 20 which are stacked up and down;
it should be noted that, two electric core combinations located in front are provided, and the tab setting surface of the electric core is located at the front side of the electric core combination; the two battery cell combinations are positioned at the rear, and the lug setting surfaces of the battery cells are positioned at the rear side of the battery cell combinations;
wherein, the front and rear sides of the battery module main body are respectively and vertically provided with an outer cover plate 21;
wherein, the upper cover plate 251 and the lower cover plate 252 are respectively arranged below the battery module main body;
an upper cap plate 251 and a lower cap plate 252, respectively, between the upper cap plate 251 and the battery module body, provided with a cap plate insulating sheet 26;
Wherein, a heating plate 27 (e.g., PTC heating plate) is vertically provided at both left and right sides of the battery module body, respectively;
a heat-conducting silica gel sheet 28 is arranged at a position between each heating sheet 27 and the battery module body;
in particular, an inner separator 22 is arranged between the front side and the rear side of the battery module main body and each outer cover plate 21;
each inner partition plate 22 and the position between the adjacent outer cover plates 21 are also respectively provided with a battery cell group busbar 23;
in particular, the front cell grouping busbar 23 is also connected with the PCB acquisition board 24;
In particular, the wiring harness 240 of the PCB collection board 24 is embedded into the wire grooves 220 provided on the inner spacer 22.
It should be noted that, the cell grouping busbar 23 is used for laser welding with the tab on the cell 20.
In the invention, a PCB acquisition board 24 is used for acquiring information of single cells in a battery module, and a plurality of acquisition wiring harnesses led out from the upper surface of the PCB acquisition board 24 are connected with a cell grouping busbar 23.
In particular, for each battery module, two plastic cover plates 29 are arranged above the upper cover plate 251 at intervals;
a bridging aluminium row 30 is provided under each plastic cover plate 29;
and bridging the two ends of the aluminum bar 30 and respectively connecting with the adjacent cell grouping buses 23.
In particular, the bridging aluminum rows 30 are U-shaped in shape.
In particular, a bottom plastic partition plate 31 is arranged below the bridging aluminum row 30;
The bridging aluminum row 30 is fixedly connected with the upper cover plate 251 through a first fixing screw 321 penetrating through the bottom plastic partition 31 in a threaded manner (the first fixing screw 321 vertically penetrates through a reserved hole on the bottom plastic partition 31).
In particular, the cell grouping busbar 23 located at the rear side of the battery module body is connected with the total positive and negative bolting posts 33 (totally two).
It should be noted that, for a single battery module, two total positive and negative bolting posts 33, which are total positive and negative output ends of the battery module, are installed in the main case 1, and the series connection between the battery modules and the power connection in the battery pack are realized through a plurality of inter-module bus bars 102.
In particular, the upper and lower ends of the outer cover 21 are respectively connected to adjacent ends of the upper cover 251 and the lower cover 252 by second fastening screws 322.
In a specific implementation, the upper cover plate 251 and the lower cover plate 252 are all aluminum profile end plates.
In the present invention, for each battery module 2, two ends of the heating plate 27 are respectively provided with a vertically penetrating module long screw hole 270;
each module long screw hole position 270 is fixedly connected with the supporting beam 11 fixedly arranged on the inner side of the bottom of the main box body 1 through a long screw 103.
In particular, the battery pack of the present invention further comprises a plurality of box press beams 104;
a plurality of long screws 103 positioned on the same transverse straight line penetrate through holes reserved on the same box body pressing beam 104; therefore, the plurality of battery modules in the main casing 1 are compressed and fixed in the lateral and vertical directions by the casing compression beam 104 and the long screw 103.
In the invention, in particular implementation, for the battery module, the busbar assembly (namely the battery cell group busbar 23) is formed by laser welding, the total positive and negative rows of the module are compounded by copper and aluminum, and the surfaces of the total positive and negative bolting columns are copper;
In the invention, in particular to a battery module, a busbar assembly is fixed on an inner separator plate through hot melting by a hot melting column and then integrally arranged on the upper part of a battery cell, and the battery cell is connected through laser welding and converging;
in the invention, the inner baffle plate is designed with a chute for installing the PCB collecting plate of the module, the inner baffle plate 22 is also provided with a boss, the corresponding part of the outer cover plate 21 is opened, and the outer cover plate 21 and the inner baffle plate 22 are connected through self-tapping screws;
in the present invention, for the battery module, the PTC heating sheet is in contact with the battery cell through the heat conductive silicone sheet 28;
In the invention, in particular implementation, for the LMU (local battery monitoring unit) acquisition board 17, the shell is made of aluminum material, so as to lighten the weight and improve the energy density of the whole box body;
In the invention, the bus bars are made of copper bus bars, so that the cost is reduced, the bus bars have excellent conductivity, and the temperature rise in the high-rate charge and discharge process is reduced;
In the invention, the upper case cover 3 is an aluminum case cover, so that the weight is reduced, and the energy density of the whole battery pack is improved;
In the invention, in particular, a cavity for fixing a module is formed in a main box body 1, and a supporting beam 11 (Europe Mi Galiang) for welding nuts is arranged at the bottom of the main box body to play a role in reinforcing the box body and installing the module;
In the invention, the box body pressing beam 104 is used for fixing the battery module;
in the invention, the lifting lugs 19 (i.e. hanging lugs) fixedly arranged on the left side and the right side of the main box body 1 are used for lifting in the process of packaging and loading the battery pack;
in the present invention, the outer surface of each cell 20 is wound with PI film;
a PC (polycarbonate) sheet without back adhesive is placed between any two adjacent cells 20.
In order to fix the battery module, the battery module is bolted to the bottom of the main case by a long screw bolt and a welding nut on the support beam 11 (Europe Mi Galiang), and the case press beam 104 fastens the module to the case side in series.
In order to more clearly understand the technical scheme of the present invention, the working principle of the present invention is described below in conjunction with specific embodiments.
As shown in fig. 1 and 2, PI films (polyimide films) are wound on the outer surface of each cell 20 to ensure good insulation, then the cells are externally arranged according to the arrangement shown in fig. 1, insulation is performed between the cells by using insulation PC films, the arranged cells are extruded and positioned on a fixture, an upper cover plate 251, a lower cover plate 252 and a heating plate 27 are mounted, so that a frame is formed, and a battery module is initially formed;
As shown in fig. 7, in the combination of the inner separator 22 of the battery module, the cell group bus bar 23 and the wire harness of the PCB collecting board 24, the wire harness 240 of the PCB collecting board 24 is ultrasonically welded to the cell group bus bar 23, then the welded assembly is assembled with the inner separator 22, the wire harness 240 in the assembly is spread and fixed through the wiring groove (i.e. the wire groove 220) on the inner separator 22, and the cell group bus bar 23 (particularly, the aluminum bar) is fixed by hot melting through the hot melting column 221 on the inner separator 22.
As shown in fig. 3, after the assembly of fig. 1,2 and 7, the combination of the inner partition 22, the cell group bus bar 23 and the wire harness of the PCB collecting board 24 is installed on the lug surface of the cell of the battery module, the inner partition 22 is fixed on the upper cover plate 251 and the lower cover plate 252 of the battery module by using the second fixing screw 322, then, the laser welding process of the cell group bus bar 23 (specifically adopting an aluminum bar) and the cell lug is entered, after the welding is completed, the plastic cover plate 29 and the outer cover plate 21 are installed, and fastening is performed by using screws, so that the assembly of the battery module is completed;
as shown in fig. 4, when the battery pack is assembled, a positive and negative output terminal box (i.e., a power terminal box) 12, a fuse 13, a Maintenance Switch (MSD) 14, a communication port 16, a heating port 15, a total positive and negative connection row, a total positive and negative output row protection plastic frame 18 and a lifting lug 19 are sequentially installed at the front part of the case, as shown in fig. 5, and the module is installed; as shown in fig. 7, the battery module is fixed with a long screw;
In the present invention, the battery pack further includes a plurality of inter-module bus bars 102, and both ends of the inter-module bus bars are respectively connected to one total positive and negative bolting post 33 of the adjacent battery module 2, so that the series connection between six battery modules in the battery pack is realized, and the electrical connection path in the battery pack is ensured.
In the invention, the total positive and negative output row protection plastic frame 18 is mounted at the front part of the interior of the battery pack box body, and the total positive and negative output row protection plastic frame 18 at the front part of the interior of the battery pack box body can play an insulating protection role on the total positive and negative connection rows through bolting with the threaded holes on the mounting seat of the fuse 13.
In the invention, the battery pack further comprises an LMU acquisition board (including a wire harness) 17, wherein the LMU acquisition board 17 is respectively connected with the PCB acquisition board 24 on each battery module and the communication port 16 on the main box body 1 through the wire harness, so that the communication port 16 is accessed through external equipment to realize monitoring of information such as battery voltage, temperature, SOC and the like in the battery pack.
As shown in fig. 7, the battery module 2 is fixed to a support beam 11 (e.g., an omega beam) at the bottom of the main casing 1 by a long screw 103, and then, as shown in fig. 4, an inter-module bus bar 102 and an LMU collection board (including a wire harness) 17 are installed;
As shown in fig. 5, adjacent battery modules 2 of each row are alternately arranged, so that the effective space in the box is greatly utilized;
As shown in fig. 6, the contact surface between the battery module 2 and the bottom of the main case 1 and the contact surface between the battery module and the PTC heating sheet (heating sheet 27) have a heat-conducting silica gel structure (specifically including a heat-conducting silica gel pad 101 and a heat-conducting silica gel sheet 28) as heat-conducting medium, so that the heat dissipation rate of the battery module is greatly improved;
in the concrete implementation, the used heat-conducting silica gel pad needs to ensure that the compression amount is about 50%, so that the heat conductivity is maximum;
In particular implementation, a wiring groove (i.e., a wire groove) is designed on the inner partition 22 for protecting and planning the sampling wire harness of the PCB acquisition board;
the upper cover plate and the lower cover plate on the upper side and the lower side of the battery module are provided with binding wire slots for binding the acquisition wire bundles in the box;
in particular, the plastic frame 18 for protecting the total positive and negative output rows is designed to insulate and protect the inner side of the battery pack towards the front part.
In particular, the battery cell, preferably a small lithium iron phosphate battery cell, is adopted, and the battery module structure is developed, so that the battery pack with high specific energy and good heat dissipation effect is formed by combining the utilization of the whole space of the module in the box body and the special heat conduction design of the module.
Based on the technical scheme, the invention provides a high specific energy battery pack, which comprises a battery module, a box body assembly, an LMU acquisition board, a busbar, a wire harness and a high-low voltage plug-in unit; the battery module comprises a battery cell, an inner partition plate, an outer cover plate, a busbar assembly, an insulating sheet, an upper end plate, a lower end plate, a PTC heating sheet, a heat-conducting silica gel sheet, a collection PCB assembly and the like, wherein a PI film is wound outside the battery cell, a non-adhesive PC sheet is placed between the battery cells, the battery cells are fixed through a frame formed by the PTC heating sheet and the upper end plate and the lower end plate, a heat-conducting silica gel pad is adhered between the PTC heating sheet and the battery cells, the battery cells are connected through busbar laser welding, and a plastic cover plate is assembled outside the battery cells; the module is fixed with the bottom of the box body through long bolts and is reinforced through a box body pressing beam; the single cell information collection and detection in the battery module is carried out through a wire harness in the box, connected to the PCB collection board of each module and finally summarized to the LMU collection board; after the whole battery pack is installed, the protection grade above IP67 can be met.
Compared with the prior art, the high specific energy battery pack provided by the invention has the following beneficial effects:
1. the battery module frame type assembling mode is reliable in grouping, and meanwhile, the standardized module mode is convenient for maintenance and foolproof in the installation process;
2. the module frame type structure is designed in an asymmetric mode at the fixed point of the module, and when the modules are put into the box, the adjacent vertical columns of modules can be installed in an interactive mode, so that the space utilization rate of the box body is increased;
3. The four large surfaces of the module can be contacted with the aluminum PTC and the upper and lower end plates through the heat-conducting silica gel pad, so that the overall heat dissipation effect is good, and the service life of the battery is prolonged;
4. the busbar is fixed on the inner partition board through hot melting by a hot melting column, the acquisition wire harness is fixed on the inner partition board through a wiring groove, and then the acquisition wire harness is integrally assembled at the upper end of the module for laser welding and fixing;
5. the module is fixed with the bottom of the box body through long bolts and is reinforced through the box body pressing beam.
In summary, compared with the prior art, the high specific energy battery pack provided by the invention has scientific structural design, can improve the overall space utilization rate of the box body under the condition of ensuring the strength of the box body, is beneficial to improving the market application prospect of products of battery manufacturers, and has great practical significance.
Through inspection, the battery pack provided by the invention has the advantages that the overall structural strength of the box body is high, the sealing waterproof performance is good, the level requirement above IP67 can be met, meanwhile, the compact frame type module design improves the overall space utilization rate of the box body, and the standard modularized module design has interchangeability and foolproof effect, so that the battery pack is a real safe and reliable battery pack with high specific energy.
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 (9)
1. A high specific energy battery pack, characterized by comprising a hollow main box body (1) with an open top;
a plurality of battery modules (2) which are arranged in parallel are arranged in the main box body (1);
an upper box cover (3) is fixedly arranged at the top of the main box body (1);
a heat conduction silica gel pad (101) is arranged between the contact surface of each battery module (2) and the bottom of the main box body (1);
wherein each battery module (2) comprises a battery module main body;
The battery module main body comprises four battery cell combinations, and each battery cell combination comprises a plurality of battery cells (20) which are stacked up and down;
The outer surface of each cell (20) is wound with a PI film;
A PC sheet is arranged between any two adjacent battery cores (20);
The battery cell comprises two battery cell combinations positioned in front, wherein the lug setting surface of each battery cell is positioned at the front side of each battery cell combination; the two battery cell combinations are positioned at the rear, and the lug setting surfaces of the battery cells are positioned at the rear side of the battery cell combinations;
wherein, the front and back sides of the battery module main body are respectively and vertically provided with an outer cover plate (21);
Wherein, the lower part of the battery module main body is respectively provided with an upper cover plate (251) and a lower cover plate (252);
an upper cover plate (251) and a lower cover plate (252), respectively, between the upper cover plate and the battery module body, a cover plate insulating sheet (26) is arranged;
wherein, the left and right sides of the battery module main body are respectively and vertically provided with a heating plate (27);
A heat conduction silica gel sheet (28) is arranged at the position between each heating sheet (27) and the battery module main body;
For each battery module (2), two ends of the heating plate (27) are respectively provided with a vertically-penetrated module long screw hole site (270);
each module long screw hole site (270) is fixedly connected with a supporting beam (11) fixedly arranged on the inner side of the bottom of the main box body (1) through a long screw (103) in a threaded manner;
An inner baffle plate (22) is arranged between the front side and the rear side of the battery module main body and each outer cover plate (21);
a plurality of lifting lugs (19) are respectively and fixedly arranged on the left side and the right side of the main box body (1).
2. The high specific energy battery pack of claim 1,
Each inner partition plate (22) and the position between the adjacent outer cover plates (21) are respectively provided with a cell group busbar (23);
The cell grouping busbar (23) is positioned in front and is also connected with the PCB acquisition board (24);
The wire harness (240) of the PCB acquisition board (24) is embedded into the wire groove (220) arranged on the inner partition board (22).
3. The high specific energy battery pack according to claim 2, wherein for each battery module, two plastic cover plates (29) are provided above the upper cover plate (251) at intervals;
A bridging aluminum row (30) is arranged below each plastic cover plate (29);
and the two ends of the bridging aluminum row (30) are respectively connected with the adjacent cell grouping buses (23).
4. A high specific energy battery pack as in claim 3, wherein the bridging aluminum rows (30) are "U" -shaped.
5. A high specific energy battery pack as in claim 3, wherein a bottom plastic separator (31) is provided across the underside of the aluminum row (30);
the bridging aluminum row (30) is fixedly connected with the upper cover plate (251) through a first fixing screw (321) penetrating through the bottom plastic partition plate (31).
6. The high specific energy battery pack according to claim 1, wherein the upper and lower ends of the outer cover plate (21) are connected to the adjacent ends of the upper cover plate (251) and the lower cover plate (252) by second fastening screws (322), respectively.
7. The high specific energy battery pack of claim 1, further comprising a plurality of box press beams (104);
A plurality of long screws (103) positioned on the same transverse straight line penetrate through holes reserved on the same box body pressing beam (104).
8. The high specific energy battery pack according to claim 1, wherein the heating sheet (27) is a PTC heating sheet;
A PC sheet without back glue is arranged between any two adjacent battery cores (20).
9. A high specific energy battery pack according to any one of claims 2 to 5, further comprising an LMU acquisition board (17), wherein the LMU acquisition board (17) is connected to the PCB acquisition board (24) on each battery module and to the communication port (16) on the main housing (1) via wiring harnesses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110467267.1A CN113224435B (en) | 2021-04-28 | 2021-04-28 | High specific energy battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110467267.1A CN113224435B (en) | 2021-04-28 | 2021-04-28 | High specific energy battery pack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113224435A CN113224435A (en) | 2021-08-06 |
| CN113224435B true CN113224435B (en) | 2024-06-11 |
Family
ID=77089686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110467267.1A Active CN113224435B (en) | 2021-04-28 | 2021-04-28 | High specific energy battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113224435B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851776A (en) * | 2021-09-29 | 2021-12-28 | 东莞新能安科技有限公司 | Battery module, battery package and consumer |
| CN115312953B (en) * | 2022-09-30 | 2023-02-03 | 中国第一汽车股份有限公司 | Power battery assembly, thermal management control method thereof and electric vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018059143A1 (en) * | 2016-09-29 | 2018-04-05 | 蔚来汽车有限公司 | Battery module and new energy vehicle |
| CN208226005U (en) * | 2018-04-20 | 2018-12-11 | 桑顿新能源科技有限公司 | A kind of high-energy density soft-package battery modular structure |
| CN208690359U (en) * | 2018-10-19 | 2019-04-02 | 芜湖天量电池***有限公司 | A kind of power battery pack |
| WO2020028931A1 (en) * | 2018-08-07 | 2020-02-13 | Voltlabor Gmbh | Battery |
| CN111599959A (en) * | 2020-05-29 | 2020-08-28 | 安徽江淮汽车集团股份有限公司 | Battery module and light-duty commodity circulation car |
| CN216054966U (en) * | 2021-04-28 | 2022-03-15 | 力神（青岛）新能源有限公司 | High specific energy battery pack |
-
2021
- 2021-04-28 CN CN202110467267.1A patent/CN113224435B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018059143A1 (en) * | 2016-09-29 | 2018-04-05 | 蔚来汽车有限公司 | Battery module and new energy vehicle |
| CN208226005U (en) * | 2018-04-20 | 2018-12-11 | 桑顿新能源科技有限公司 | A kind of high-energy density soft-package battery modular structure |
| WO2020028931A1 (en) * | 2018-08-07 | 2020-02-13 | Voltlabor Gmbh | Battery |
| CN208690359U (en) * | 2018-10-19 | 2019-04-02 | 芜湖天量电池***有限公司 | A kind of power battery pack |
| CN111599959A (en) * | 2020-05-29 | 2020-08-28 | 安徽江淮汽车集团股份有限公司 | Battery module and light-duty commodity circulation car |
| CN216054966U (en) * | 2021-04-28 | 2022-03-15 | 力神（青岛）新能源有限公司 | High specific energy battery pack |
Non-Patent Citations (1)
| Title |
|---|
| 紧固件在动力电池***上的可靠性设计与扭矩研究;黄卫峰;王楠;赵晓军;帅建华;;汽车实用技术;20200215(03);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113224435A (en) | 2021-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113224435B (en) | High specific energy battery pack | |
| CN201975466U (en) | Integral pressed stacked battery module | |
| KR20120081402A (en) | Effective battery cell series & parallel connection system and battery module assembling | |
| CN111933882A (en) | Battery system | |
| CN211017194U (en) | Large capacity power battery module | |
| CN112072026A (en) | Power battery pack | |
| CN111952523A (en) | Battery pack | |
| CN113871771A (en) | Module of battery pack and battery pack | |
| CN216054966U (en) | High specific energy battery pack | |
| CN114388968A (en) | Non-module battery pack integration device adopting soft package battery core | |
| CN111952497B (en) | Battery grouping structure beneficial to battery monomer recovery echelon utilization | |
| CN106098993B (en) | A kind of battery case | |
| CN202275898U (en) | Polymer cell power cell packaging structure for electric automobile | |
| CN110911610A (en) | Energy storage power supply device and assembling method thereof | |
| CN114400414B (en) | Battery cell module and battery pack | |
| CN216488236U (en) | High-safety high-specific-energy soft-package battery system | |
| CN113889708B (en) | Vehicle and battery pack thereof | |
| CN215527855U (en) | Power battery system and electric vehicle | |
| CN112490575B (en) | Battery module unitized construction | |
| CN212587624U (en) | Power battery pack | |
| CN114865191A (en) | Double-layer module battery system and vehicle | |
| CN215418406U (en) | Battery module | |
| CN113782897A (en) | Battery pack and vehicle with same | |
| CN220692263U (en) | Efficient battery pack | |
| CN206163549U (en) | Battery box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220119 Address after: 266500 Minshan Road, Huangdao District, Qingdao, Shandong Applicant after: LISHEN (QINGDAO) NEW ENERGY CO.,LTD. Address before: 300384 Tianjin Binhai New Area Binhai high tech Industrial Development Zone Huayuan science and Technology Park (outer ring) 38 Haitai South Road Applicant before: LISHEN POWER BATTERY SYSTEMS Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |