CN114709547A - Lithium metal negative electrode solid-state battery module - Google Patents
Lithium metal negative electrode solid-state battery module Download PDFInfo
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- CN114709547A CN114709547A CN202210097631.4A CN202210097631A CN114709547A CN 114709547 A CN114709547 A CN 114709547A CN 202210097631 A CN202210097631 A CN 202210097631A CN 114709547 A CN114709547 A CN 114709547A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
Abstract
The invention discloses a lithium metal negative electrode solid-state battery module, which comprises a plurality of subunits, wherein each subunit comprises at least two battery cells and a protective frame, the left end and the right end of each battery cell are respectively provided with a tab, each battery cell is inserted into the protective frame, the tab at the left end of each battery cell extends out of the protective frame and is electrically connected with a first busbar, the tab at the right end of each battery cell extends out of the protective frame and is electrically connected with another first busbar, so that at least two battery cells in the protective frame are connected in parallel, and the subunits are electrically connected in series and/or in parallel. This solid-state battery module of lithium metal negative pole adopts a plurality of subunits location to combine, has improved the efficiency of assembly, also can improve the stability of product structure simultaneously, and the security can realize the series-parallel connection of different demands through the mode that increases a plurality of subunits, satisfies the application of multiple scene to through the big module of integrated soft package, improve the long-pending energy density of battery inclusion.
Description
Technical Field
The invention relates to a battery grouping technology, in particular to a lithium metal cathode solid-state battery module.
Background
The battery module is a modularized mechanism formed by a plurality of battery cores in a series-parallel connection mode in the comprehensive consideration of the mechanical, thermal and safety characteristics of the battery, and the design of the structure, the safety performance and the electrical performance of the modularized mechanism play a decisive role in the whole power battery.
With the development of the electric automobile industry, the module size of the power battery is changed from 355 to 390 to 590, and then the power battery is changed to a large module, even to a module-free ctp (cell to pack), a blade battery and the like, and the change of the whole module size is no more than to better improve the space utilization rate of the battery pack, or to improve the volume energy density, after all, the weight energy density of the battery reaches the limit, and the better size module layout naturally becomes the key point.
The applicant researches the existing battery modules carefully, and considers that the development of the power battery is more inclined to the scheme of ctp (cell to pack), i.e. the whole battery pack is changed into a large module, but the development evolution of ctp (cell to pack) itself is also divided into a plurality of different stages, namely, the conventional four modules are transited to the large module, and finally, no module is provided.
Traditional battery is the module by electric core equipment, installs the module again in the battery package, and the space utilization of battery package is only 40%, and directly integrated as the battery package from electric core to save middle module, battery package space utilization also can exceed 60%. The number of parts of the battery pack is reduced by 40%, the production efficiency is improved by 50%, but the technical difficulty of the current grouped large module is that the problems of low assembly performance, size adaptability and transportability, safety, strength and the like of the product are solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a lithium metal cathode solid-state battery module, which adopts the positioning combination of a plurality of subunits, improves the assembly efficiency, can also improve the stability and the safety of the product structure, can realize series-parallel connection of different requirements by increasing a plurality of subunits, meets the application of various scenes, and improves the energy density of the battery pack volume by integrating a large soft package module.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a lithium metal negative pole solid state battery module, includes a plurality of subunits, every the subunit includes two at least electric cores and a bearer bar, the left end and the right-hand member of electric core respectively are provided with a utmost point ear, electric core cartridge is in the bearer bar, the utmost point ear of electric core left end stretches out be connected with a first busbar electricity behind the bearer bar, the utmost point ear of electric core right-hand member stretches out be connected with another first busbar electricity behind the bearer bar to make two at least electric cores in the bearer bar parallelly connected, it is a plurality of rethread series connection and/or parallelly connected mode electricity is connected between the subunit.
Preferably, a positioning assembly is arranged on the protective frame and used for positioning and installing two adjacent subunits.
Preferably, heat insulation foam is arranged between every two adjacent subunits.
As preferred, the bearer bar is including the left side frame, topside and the right frame that connect gradually, left side frame with first bar hole has been equallyd divide to the right frame, run through and extend to the bottom that corresponds left side frame or right frame about the first bar hole, so that the bottom cartridge that the bearer bar can be followed to electric core extremely in the bearer bar, the utmost point ear correspondence of electric core passes behind the first bar hole with first busbar electricity is connected.
Preferably, the protection frame further comprises a protection cover and cell edge sealing foam arranged between the protection cover and the cell, and the two protection covers are correspondingly connected with the left frame and the right frame respectively.
As preferred, still include the carriage, the carriage includes front end plate, back end plate, left busbar protecting cover, right busbar protecting cover, module upper cover and module lower cover, and is a plurality of the subunit stacks from the front to the back in the carriage, the subunit with be provided with the heat-conducting medium layer between the module lower cover for with the heat transfer of electric core to module lower cover, all be provided with the end plate insulating piece between front end plate, back end plate and the adjacent subunit.
Preferably, the first busbar is correspondingly provided with at least one second strip-shaped hole extending longitudinally.
Preferably, FPCs are disposed between the sub-units and the module upper cover, and are used for being electrically connected to the plurality of sub-units respectively, or for being electrically connected to the plurality of sub-units connected in parallel respectively, or for being electrically connected to the plurality of sub-units connected in series respectively.
Preferably, the front and back end border of the upper surface of the protective cover upwards extends to form convex edges, the convex edges correspond to the left frame or the right frame, a limit boss is further arranged between the two convex edges on the upper surface of the protective cover, and the cell edge sealing foam is located between the two convex edges and located on the inner side of the limit boss.
Preferably, parallel busbars and series busbars are further disposed on the left and right sides of the plurality of sub-units, respectively, and busbar insulation covers are further disposed between the parallel busbars and the series busbars.
Compared with the prior art, the lithium metal cathode solid-state battery module has the advantages that:
(1) through being a big module in groups, obtained higher PACK space utilization, in order to promote the assembly efficiency of big module, designed the bearer bar of a subunit simultaneously, pass through the bearer bar with two and above electric core and in groups the subunit that connects in parallel, the series-parallel connection of different demands can be realized to the mode through a plurality of subunits, and the suitability is stronger. And moreover, the positioning assembly is designed on the protective frame, so that the alignment precision of the protective frame during installation is ensured.
(2) Be provided with the heat conduction passageway in the bearer bar bottom of subunit, the heat of electricity core passes through the heat conduction silica gel in the heat conduction passageway or other heat-conducting medium and transmits the module lower cover, exchanges the outside again, has solved electric core heat dissipation problem.
(3) Use the cotton effectual absorption inflation size of thermal-insulated bubble between the subunit, through the hollow project organization of end plate again simultaneously, add intensity, resist the bulging force, solved the electric core bulging force problem that the module brought in the in-service use.
(4) The design of the heat insulation foam has the heat insulation capability of preventing the electric core from thermal runaway;
(5) the protective cover is used for buckling the protective frame to enable the structure to be complete and strength to be increased, and electric core edge sealing foam is supported on the protective cover; the cotton effect of electricity core banding bubble is in order to protect the banding, prevents that the product from in long-term use, leading to the wearing and tearing of electricity core banding.
Drawings
Fig. 1 is a first schematic structural diagram of a solid-state battery in the present embodiment;
fig. 2 is a second schematic structural diagram of the solid-state battery in the present embodiment;
FIG. 3 is a schematic view illustrating the installation of a plurality of sub-units according to the present embodiment;
fig. 4 is an exploded view of the solid-state battery according to the first embodiment;
fig. 5 is an exploded view of the solid-state battery according to the second embodiment;
FIG. 6 is an exploded view of a subunit in this embodiment;
FIG. 7 is a schematic view of the protective cover of the present embodiment;
FIG. 8 is an enlarged schematic view at A in FIG. 5;
fig. 9 is a partially enlarged schematic view of a heat conductive medium layer.
In the figure, 1, subunit; 11. an electric core; 111. a tab; 12. a protective frame; 121. a left frame; 1211. a first bar-shaped hole; 122. a top edge; 123. a right frame; 124. a protective cover; 1241. a convex edge; 1242. a limiting boss; 1243. a trench; 125. cell edge sealing foam; 13. a first bus bar; 131. a second bar-shaped hole; 2. heat insulation foam; 3. a support frame; 31. a front end plate; 32. a rear end plate; 33. a left busbar cover, 34, a right busbar cover; 35. a module upper cover; 36. a module lower cover; 4. a heat-conducting medium layer; 5. an end plate insulating sheet; 6. FPC; 7. a parallel bus; 8. a serial bus; 9. and a busbar insulation cover.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Examples 1,
A lithium metal negative electrode solid-state battery module is shown in combination with 1-9 and comprises a supporting frame 3 and a plurality of sub-units 1, wherein the sub-units 1 are stacked in the supporting frame 3 from front to back, and the sub-units 1 are electrically connected in series and/or in parallel. Through subunit 1 of different quantity, realize assembling the battery module of equidimension not, can the size of effective control battery module, be convenient for realize the series-parallel structure of different products.
Each subunit 1 includes at least two battery cells 11 and a protection frame 12, the protection frame 12 includes a left frame 121, a top edge 122, and a right frame 123 that are connected in sequence, a first strip hole 1211 is respectively formed in each of the left frame 121 and the right frame 123, the first strip hole 1211 runs through and extends to the bottom of the corresponding left frame 121 or the right frame 123 from left to right, a tab 111 is respectively disposed at each of the left end and the right end of each of the battery cells 11, the battery cells 11 are inserted into the protection frame 12, the tab 111 at the left end of each of the battery cells 11 extends out of the protection frame 12 and is electrically connected to one of the first bus bars 13, the tab 111 at the right end of each of the battery cells 11 extends out of the protection frame 12 and is electrically connected to the other first bus bar 13, so that at least two battery cells 11 in the protection frame 12 are connected in parallel.
The protection frame 12 further includes a protection cover 124 and cell edge sealing foam 125 disposed between the protection cover 124 and the cell 11, and two protection covers 124 are disposed and respectively connected to the left frame 121 and the right frame 123.
Specifically, the front and rear end edges of the upper surface of the protective cover 124 extend upward to form convex edges 1241, the convex edges 1241 are connected with the corresponding left frame 121 or right frame 123 in a buckling manner, a limiting boss 1242 is further arranged between the two convex edges 1241 on the upper surface of the protective cover 124, the battery cell edge sealing foam 125 corresponds to the protective cover 124 one by one, and the battery cell edge sealing foam 125 is located between the two convex edges 1241 and located inside the limiting boss 1242. The setting of spacing boss 1242 can restrict the cotton 125 position of electric core banding bubble on the one hand, is provided with a plurality of slots 1243 on the spacing boss 1242 of on the other hand, the counterpoint installation of the left frame 121 or the right frame 123 bottom of being convenient for. Because be provided with the first bar 1211 that extends to the bottom on left frame 121 and the right frame 123, avoid influencing its structural strength, left frame 121 and right frame 123 still are provided with the strengthening rib structure in the both sides of first bar 1211, and the corresponding cartridge in the slot 1243 of spacing boss 1242 in the bottom of left frame 121 and right frame 123 in addition, not only can play the effect of location, can also increase the structural strength of subunit 1 after the equipment.
The protective cover 124 is used for fastening the protective frame 12 to enable the structure to be complete and strength to be increased, and is used for supporting the cell edge sealing foam 125 on the protective cover; the cell edge sealing foam 125 is used for protecting the edge sealing 111 and preventing the abrasion of the cell edge sealing 111 caused by long-term use of the product.
Those skilled in the art should understand that the number of the first strip-shaped holes 1211 on the left frame 121 and the right frame 123 corresponds to the number of the battery cells 11 of the subunit 1, or the number of the first strip-shaped holes 1211 is smaller than the number of the battery cells 11.
As shown in fig. 6, three battery cells 11 are disposed in one protection frame 12, two first strip-shaped holes 1211 are disposed on each of the left frame 121 and the right frame 123, and when the sub-unit 1 is assembled, the tab 111 of the battery cell 11 located in the middle is bent toward the tab 111 of another battery cell 11, so that the two battery cells 11 pass through the same first strip-shaped hole 1211. After the three battery cells 11 are mounted in the protective frame 12, the two first bus bars 13 are fixed to the left frame 121 and the right frame 123 by plastic rivets, respectively. The first bus bar 13 is provided with a second elongated hole 131 extending in the longitudinal direction, and the second elongated hole 131 corresponds to one first elongated hole 1211 of the left frame 121 or the right frame 123. When the first bus bar 13 is installed, the tabs 111 of the battery cells 11 sharing one first strip-shaped hole 1211 sequentially pass through the first strip-shaped hole 1211 and the second strip-shaped hole 131 and then are fixed on the corresponding left frame 121 and right frame 123, and after the tabs 111 of the other battery cell 11 pass through the first strip-shaped hole 1211, the tabs 111 of the battery cell 11 pass through the gap between the first bus bar 13 and the left frame 121 or the right frame 123, and then the battery cell edge-sealed foam 125 and the protective cover 124 are installed on the corresponding left frame 121 and right frame 123 in a buckling manner, and then the tabs 111 of the battery cell 11 are welded on the first bus bar 13 in a bending manner, so that the sub-unit 1 is assembled.
It should be understood by those skilled in the art that if the first bus bar 13 does not have the second elongated hole 131, the size of the first bus bar 13 should be smaller than the size of the side surface of the left frame 121, and the tabs 111 of the battery cells 11 penetrate through the left frame 121 or the right frame 123 and then penetrate out of the two sides of the first bus bar 13 and are bent and welded to the first bus bar 13. As shown in fig. 6, the first bus bar 13 provided with the second strip-shaped hole 131 is installed, and when the first bus bar 13 is installed, the first bus bar 13 is sleeved outside the tab 111 of the electric core 11, and is not easy to fall off, so that the machine equipment can be used for positioning and assembling.
Be provided with thermal-insulated cotton 2 of steeping between two adjacent subunits 1, the size of thermal-insulated cotton 2 of steeping is preferred can cover electric core 11 body completely, and the effectual emergence of alleviating electric core 11 thermal runaway is used for cushioning electric core 11's bulging force simultaneously.
The protection frame 12 is provided with a positioning component for facilitating positioning and installation of two adjacent subunits 1. Specifically, the front side and the rear side of the left frame 121 and the right frame 123 are respectively provided with a positioning protrusion and a positioning slot hole, the positioning slot holes are matched with the positioning protrusions, the positioning protrusions of two adjacent left frames 121 or two adjacent right frames 123 can be correspondingly inserted into the positioning slot holes, and therefore positioning and installation of the subunit 1 are facilitated. As shown in fig. 6, the left frame 121 and the right frame 123 are centrosymmetric, the upper half area of the rear side of the left frame 121 is provided with a positioning protrusion, the lower half area is provided with a positioning groove, the upper half area of the rear side of the right frame 123 is provided with a positioning groove, and the lower half area is provided with a positioning protrusion.
Those skilled in the art should understand that there are many forms of the positioning assembly, the positioning protrusion may be a regular cylinder or an irregular block, and the position of the positioning assembly may be set on the left frame 121 or the right frame 123, or on the top edge, as long as it can realize positioning of two adjacent sub-units 1, so as to facilitate accurate positioning and installation.
The support frame 3 includes a front end plate 31, a rear end plate 32, a left bus bar cover 33, a right bus bar cover 34, a module upper cover 35, and a module lower cover 36.
And a heat-conducting medium layer 4 is arranged between the subunit 1 and the module lower cover 36 and used for transferring the heat of the battery cell 11 to the module lower cover 36 and then to a water cooling plate of a PACK or other heat exchange devices. The lower surface coating one deck heat conduction silica gel of a plurality of subunits 1 that are in the same place of stack, and then form heat conduction medium layer 4, the upper surface of heat conduction medium layer 4 offsets with electric core 11 and thermal-insulated bubble cotton 2, lower surface and module lower cover 36 butt, and the left side and the right side of heat conduction medium layer 4 still with visor 124 and the cotton looks butt of electric core 11 banding bubble in addition, can further restrict the cotton position of electric core 11 banding bubble.
The end plate insulation sheets 5 are arranged between the front end plate 31 and the adjacent subunit 1 and between the rear end plate 32 and the adjacent subunit.
The collection of electric core 11 sets up FPC 6 between subunit 1 and module upper cover 35 through the mode of integrated FPC 6 to use laser welding nickel piece to sample, be used for being connected with a plurality of subunits 1 electricity respectively, or be used for being connected with a plurality of subunit 1 electricity respectively that connect in parallel, or be used for being connected with a plurality of subunits 1 electricity respectively that establish ties, reduced the potential safety hazards such as assembly instability and wearing and tearing that the pencil brought. As shown in FIGS. 4 and 5, at the upper portion of the top side of the protective frame 12, an 8-position passage for the FPC is designed for mounting and positioning the FPC 6.
The assembly of the lithium metal cathode solid-state battery module comprises the following steps:
1. vertically inserting two or more than two battery cells 11 into the protective frame 12 from the bottom, correspondingly installing and buckling the battery cell edge sealing foam 125 and the protective cover 124, positioning and installing the first busbar 13, bending and welding the tabs 111 of the battery cells 11 to form a subunit 1;
2. a plurality of subunits 1 are positioned and stacked by positioning components on the side surface of a protective frame 12 for the required number of strings, and meanwhile, heat insulation foam 2 is arranged between every two adjacent subunits 1;
3. after the grouping is finished, welding the serial bus-bars 8 to form a complete loop;
4. welding the FPC to a corresponding position, and sampling the battery cell 11 of each string;
5. coating heat conduction silica gel in the bottom of a plurality of subunits 1, then installing and welding front end plate 31, rear end plate 32, left busbar protection cover 33, right busbar protection cover 34, module upper cover 35 and module lower cover 36, and completing the assembly of the whole battery module.
Compared with the prior art, this lithium metal negative pole solid-state battery through being a big module in groups, has obtained higher PACK space utilization, simultaneously in order to promote the assembly efficiency of big module, has designed the protecting frame 12 of a subunit 1, with two and above electric core 11 through protecting frame 12 in groups a parallelly connected subunit 1, the series-parallel connection of different demands can be realized through the mode of a plurality of subunits 1, the suitability is stronger. And moreover, a positioning component is designed on the protective frame 12, so that the alignment precision of a plurality of subunits 1 during installation is ensured.
For solving the heat dissipation problem of battery cell 11, the bottom of the protection frame 12 of the subunit 1 is provided with a protection cover 124 and a battery cell edge sealing foam 125, so as to reserve a channel for laying heat-conducting silica gel, and the heat of the battery cell 11 is transferred to the module lower cover 36 through the heat-conducting silica gel or other heat-conducting media, and then is exchanged to the outside.
For solving the 11 bulging force of electric core that the module brought in the in-service use, use the effectual absorption inflation size of thermal-insulated bubble cotton 2 between subunit 1, through the hollow project organization of end plate again simultaneously, increase strength resists the bulging force. The design of the heat insulation foam 2 also has the heat insulation capability of blocking the electric core 11 from thermal runaway.
The design of this module is the module of the solid-state laminate polymer battery development of basis, through the mode that adopts plastics protective frame 12, has improved the efficiency of assembly, also can improve the stability of product structure simultaneously, and the security can realize the series-parallel connection of different demands through the mode that increases the soft packet of subunit 1 of a plurality of simultaneously, satisfies the application demand of multiple scene to through the big module of integrated soft packet, improve the long-pending energy density of battery inclusion.
Although preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a solid-state battery module of lithium metal negative pole which characterized in that: including a plurality of subunits (1), every subunit (1) includes two at least electric cores (11) and a bearer bar (12), the left end and the right-hand member of electric core (11) respectively are provided with one utmost point ear (111), electric core (11) cartridge is in bearer bar (12), utmost point ear (111) of electric core (11) left end stretch out behind bearer bar (12) are connected with a first busbar (13) electricity, utmost point ear (111) of electric core (11) right-hand member stretch out behind bearer bar (12) are connected with another first busbar (13) electricity to make two at least electric cores (11) in bearer bar (12) parallelly connected, it is a plurality of rethread series connection and/or parallelly connected mode electricity is connected between subunit (1).
2. The lithium metal negative electrode solid-state battery module according to claim 1, characterized in that: and a positioning assembly is arranged on the protective frame (12) and used for positioning and installing the two adjacent subunits (1).
3. The lithium metal negative electrode solid-state battery module according to claim 1, characterized in that: and heat insulation foam (2) is arranged between every two adjacent subunits (1).
4. The lithium metal negative electrode solid-state battery module according to claim 1, characterized in that: the utility model discloses a battery protection structure, including battery protection frame (12), fender frame (12) including the left side frame (121), topside (122) and the right frame (123) that connect gradually, first bar hole (1211) have been seted up respectively to left side frame (121) with right side frame (123), run through and extend to the bottom of corresponding left side frame (121) or right side frame (123) about first bar hole (1211), so that battery cell (11) can follow the bottom cartridge of fender frame (12) extremely in fender frame (12), utmost point ear (111) of battery cell (11) correspond and pass behind first bar hole (1211) with first busbar (13) electricity is connected.
5. The lithium metal negative electrode solid-state battery module according to claim 4, characterized in that: the protection frame (12) further comprises a protection cover (124) and edge sealing foam arranged between the protection cover (124) and the battery cell (11), wherein two protection covers (124) are arranged and are respectively connected with the left frame (121) and the right frame (123) correspondingly.
6. The lithium metal negative electrode solid-state battery module according to claim 5, characterized in that: still include carriage (3), carriage (3) are including front end plate (31), back end plate (32), left busbar protecting cover (33), right busbar protecting cover (34), module upper cover (35) and module lower cover (36), and are a plurality of subunit (1) stacks from the front to the back in carriage (3), subunit (1) with be provided with heat-conducting medium layer (4) between module lower cover (36) for with the heat transfer of electric core (11) to module lower cover (36), all be provided with between front end plate (31), back end plate (32) and adjacent subunit (1) end plate insulating piece (5).
7. The lithium metal negative electrode solid-state battery module according to claim 4, characterized in that: the first busbar (13) is correspondingly provided with at least one second strip-shaped hole (131) extending longitudinally.
8. The lithium metal negative electrode solid-state battery module according to claim 5, characterized in that: and an FPC (6) is arranged between the subunit (1) and the module upper cover (35) and is used for being respectively and electrically connected with the subunits (1), or is used for being respectively and electrically connected with a plurality of subunits (1) connected in parallel, or is used for being respectively and electrically connected with a plurality of subunits (1) connected in series.
9. The lithium metal negative electrode solid-state battery module according to claim 4, characterized in that: the utility model discloses a battery pack, including visor (124), upper surface, lower surface, the front and back end border of visor (124) upper surface upwards extends has chimb (1241), chimb (1241) and corresponding left side frame (121) or right side frame (123) buckle is connected, the upper surface of visor (124) still is provided with spacing boss (1242) between two chimbs (1241), electric core (11) banding bubble cotton is located two between chimb (1241), and is located the inboard of spacing boss (1242).
10. The lithium metal negative electrode solid-state battery module according to any one of claims 1 to 9, characterized in that: the left side and the right side of the subunits (1) are respectively provided with a parallel busbar (7) and a series busbar (8), and a busbar insulation cover (9) is arranged between the parallel busbar (7) and the series busbar (8).
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| CN202210097631.4A CN114709547A (en) | 2022-01-27 | 2022-01-27 | Lithium metal negative electrode solid-state battery module |
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| CN202210097631.4A CN114709547A (en) | 2022-01-27 | 2022-01-27 | Lithium metal negative electrode solid-state battery module |
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| CN114709547A true CN114709547A (en) | 2022-07-05 |
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