CN115084748A - Combined battery module and battery pack - Google Patents
Combined battery module and battery pack Download PDFInfo
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- CN115084748A CN115084748A CN202210857712.XA CN202210857712A CN115084748A CN 115084748 A CN115084748 A CN 115084748A CN 202210857712 A CN202210857712 A CN 202210857712A CN 115084748 A CN115084748 A CN 115084748A
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- end plate
- battery cell
- module
- battery
- plate assembly
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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
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular 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
- H01M50/258—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
- 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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
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- 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
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a combined battery module and a battery pack, wherein the combined battery module comprises a battery cell unit, the battery cell unit comprises at least two battery cell modules which are arranged side by side, and the battery cell modules comprise at least two battery cells which are sequentially stacked along the thickness direction of the battery cell modules; two adjacent electric core module is followed the thickness direction end to end connection of electric core, two adjacent electric core module's link is equipped with first end board subassembly and second end board subassembly respectively, first end board subassembly with the second end board subassembly is spliced fixedly each other to with two adjacent electric core module fixed connection, electric core module is fixed for a whole through binding. The invention realizes modular design, can bear the expansion force of the battery cell in the module in the using process, and improves the overall structural strength of the battery cell unit and the flexibility and variability of the internal structure.
Description
Technical Field
The invention belongs to the technical field of power batteries, relates to a battery module, and particularly relates to a combined battery module and a battery pack.
Background
At present, long battery module adopts disposable integrated into one piece shaping usually, is in the same place its inside electric core and middle fixed plate bonding, and middle fixed plate is mostly single aluminium extruded section bar through the cutting shaping, does not have firm mechanical connection with the module curb plate, has following shortcoming:
(1) the long battery module is manufactured by one-time integral bonding and welding molding, is difficult to process, low in yield, high in process difficulty, difficult in material turnover and low in efficiency, and cannot realize flexible combination of module structures and diversity conversion of products;
(2) the middle fixing plate of the long battery module mostly adopts an aluminum extruded section, the side wall of the middle fixing plate is usually thin and cannot be firmly fixed with the module side plate, a replaceable bolt connection structure can be maintained, and the module structure strength is low;
(3) the long battery module adopts the shaping of once only gluing, and the unable change after the inside part electricity core damages can only wholly scrap, causes huge waste.
Therefore, how to adjust the module structure and improve the strength of the module structure has become a research focus of those skilled in the art.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a combined battery module and a battery pack, and solves the problems that a long battery module needs to be processed and formed at one time during manufacturing, the process difficulty is high, the risk is high, the yield is low, the module structure is single, the manufacturing process is difficult to adjust, and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a combined battery module, which includes a battery cell unit, where the battery cell unit includes at least two battery cell modules arranged side by side, and the battery cell modules include at least two battery cells sequentially stacked in a thickness direction of the battery cell module;
two adjacent electric core module is followed the thickness direction end to end connection of electric core, two adjacent electric core module's link is equipped with first end board subassembly and second end board subassembly respectively, first end board subassembly with the second end board subassembly is spliced fixedly each other to with two adjacent electric core module fixed connection, electric core module is fixed for a whole through binding.
As a preferred technical solution of the present invention, the first end plate assembly is provided with a first connecting portion, the second end plate assembly is provided with a second connecting portion, and the first connecting portion and the second connecting portion are vertically spliced and fixed by a fastening member.
The combined battery module further comprises two third end plate assemblies, the two third end plate assemblies are respectively arranged on the outermost sides of the battery cell units, and the third end plate assemblies are fixedly connected with the battery cell modules located on the outermost sides of the battery cell units.
And a third connecting part is arranged on the third end plate assembly, and the third connecting part is arranged on one side surface of the third end plate assembly, which is far away from the battery cell module.
As a preferred technical solution of the present invention, the first connecting portion and the second connecting portion are respectively provided with a connecting hole in a vertical direction, and the fastening member includes a bolt assembly.
After the first connecting portion and the second connecting portion are spliced, the bolt assembly sequentially penetrates through the connecting holes in the first connecting portion and the connecting holes in the second connecting portion, and is aligned in the vertical direction to be fixedly connected.
As a preferred technical solution of the present invention, the first connecting portion and the second connecting portion respectively include a connecting column and an accommodating groove, the connecting hole is disposed on the connecting column, and the accommodating groove is disposed above or below the connecting column in a vertical direction.
The connecting columns on the first connecting parts and the connecting columns on the second connecting parts are arranged in a staggered mode in the vertical direction, and the accommodating grooves on the first connecting parts and the accommodating grooves on the second connecting parts are arranged in a staggered mode in the vertical direction.
As a preferred technical solution of the present invention, the battery cell includes two terminal posts, the two terminal posts are respectively disposed at two ends of the battery cell in the length direction, and the two terminal posts on the same side of the adjacent battery cells in the battery cell module are connected by a first bus bar assembly.
The poles of the battery cells adjacent to each other on the same side in the two battery modules are connected through a second bus bar assembly.
As a preferred technical scheme of the invention, the second busbar assembly comprises a connecting plate and two connecting seats, the two connecting seats are respectively and fixedly connected with the poles of the two adjacent battery cells at the same side, the end parts of the connecting seats are provided with fixing parts for fixing the connecting plate, and the connecting plate is respectively and fixedly connected with the two connecting seats through the fixing parts.
As a preferred technical solution of the present invention, the binding member includes at least one binding band, the binding band fixes the battery cell module in a vertical direction, the first end plate assembly, the second end plate assembly, and the third end plate assembly are respectively provided with a limiting groove for accommodating the binding band, and the limiting groove is arranged in the vertical direction.
As a preferred technical solution of the present invention, the assembled battery module further includes two opposite side plates, the two side plates are disposed on two sides of the electrical core unit in the length direction, and the side plates are detachably connected to the first end plate assembly, the second end plate assembly and the third end plate assembly, respectively.
An insulating plate is further arranged between the side plate and the battery cell unit.
As a preferred technical solution of the present invention, the end surfaces of the first end plate assembly, the second end plate assembly and the third end plate assembly, which are close to one side of the side plate, are respectively provided with a fixing hole, and the side plate is fixed to the fixing holes through fixing members.
In a second aspect, the present invention provides a battery pack, which includes at least one assembled battery module according to the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the combined battery module and the battery pack, the two ends of the battery cell module are respectively provided with the end plate assemblies, so that the expansion force of a battery cell in the module in the use process can be borne, the fixation of the two ends of each battery cell module is realized, and the overall structural strength of a battery cell unit is improved;
(2) according to the combined battery module, the battery cores in the module are packaged into the plurality of battery core modules by the binding bands, so that the modular design is realized, the flexibility and variability of the internal structure are improved, the length of each module can be flexibly adjusted, and the diversification of the end plate assembly is realized;
(3) according to the combined battery module provided by the invention, a manufacturing mode that the plurality of battery cell modules are respectively and independently processed and manufactured and then flexibly combined and spliced is adopted, so that the process difficulty is reduced, the yield and the production efficiency are improved, and the manufacturing cost is reduced.
Drawings
Fig. 1 is a schematic structural view of an assembled battery module according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a first end plate assembly and a second end plate assembly provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cell module according to an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
fig. 5 is a schematic structural diagram of a cell unit according to an embodiment of the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 5 at D;
FIG. 7 is an enlarged view of a portion of FIG. 5 at E;
FIG. 8 is a schematic illustration of the structure of a strap provided in one embodiment of the present invention;
FIG. 9 is an enlarged view of a portion of FIG. 8 at B;
FIG. 10 is a schematic structural view of a side panel provided in an embodiment of the present invention;
fig. 11 is a partial enlarged view at C in fig. 10.
1, a battery cell module; 2-a first end plate assembly; 3-a second end plate assembly; 4-binding band; 5-side plate; 6, insulating plates; 7-a second busbar assembly; 8-a first fixing member; 9-a second fixing piece; 10-a first connection; 11-a second connection; 13-a third endplate assembly; 14-third fixing member.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The existing long battery module scheme needs one-time processing and forming when being manufactured, is high in process difficulty and risk and low in yield, and cannot realize flexible combination of module structures and diversity conversion of products.
At least to solve the above problem, the present invention provides a combined battery module in a specific embodiment, as shown in fig. 1, the combined battery module includes a battery cell unit, the battery cell unit includes at least two battery cell modules 1 arranged side by side, and each battery cell module 1 includes at least two battery cells sequentially stacked along a thickness direction thereof;
two adjacent electric core modules 1 are connected end to end along the thickness direction of electric core, and the link of two adjacent electric core modules 1 is equipped with first end board subassembly 2 and second end board subassembly 3 respectively, and first end board subassembly 2 and second end board subassembly 3 splice each other fixedly to with two adjacent electric core modules 1 fixed connection, electric core module 1 is fixed as a whole through binding.
The battery cell unit is formed by splicing at least two battery cell modules 1, the battery cell modules 1 independently comprise at least two battery cells, each battery cell module 1 uses the same battery cell, but the number of the battery cells in each battery cell module 1 can be the same or different. The internal structure of the combined battery module has flexible variability, so that the module can be installed adjustably, the diversification of the positions of the first end plate component 2 and the second end plate component 3 is realized, and the module structure can better adapt to the requirements of customers.
In the combined battery module, two ends of two adjacent battery cell modules 1 are respectively connected through the first end plate assembly 2 and the second end plate assembly 3, so that the expansion force of a battery cell in the use process can be borne, and the overall structural strength of a battery cell unit is improved. Simultaneously, each electric core module 1 adopts the binding piece to bind fixedly respectively independently, the binding piece is together fixed with first end plate subassembly 2 and the second end plate subassembly 3 of electric core module 1 and both sides for electric core in the electric core module 1, the inflation that produces in the use is by effectual segmentation restraint, the module end plate of conducting both sides has been avoided because inside electric core inflation is concentrated to exert pressure to traditional long battery module structure, cause the too big and damage the problem that became invalid of module end plate atress, be favorable to prolonging the life of battery module.
The battery cell module 1 is detachably connected with the first end plate assembly 2 and the second end plate assembly 3, and can be detached when needed, so that each battery cell module 1 in the battery cell unit has replaceability, and the integral scrapping of the battery cell unit caused by local battery cell damage is avoided.
According to the invention, the first end plate assembly 2 and the second end plate assembly 3 between two adjacent battery cell modules 1 adopt an inter-plug bolt connection matching structure, when the battery cell modules 1 are bolted and fixed, the corresponding first end plate assembly 2 and the corresponding second end plate assembly 3 are fixed together with the battery cell modules 1 to which the first end plate assembly and the second end plate assembly belong, so that the overall connectivity among the battery cell modules 1 in a battery cell unit and the stability of module installation are greatly improved.
In some embodiments, as shown in fig. 2 and 3, a first connecting portion 10 is disposed on the first end plate assembly 2, a second connecting portion 11 is disposed on the second end plate assembly 3, and the first connecting portion 10 and the second connecting portion 11 are vertically spliced and fixed by a fastening member.
The first connecting part 10 or the second connecting part 11 of the present invention can be disposed in the middle of the first end plate assembly 2 or the second end plate assembly 3, or disposed at both ends thereof, and an integrally formed design is adopted, so that the structural strength of the first end plate assembly 2 or the second end plate assembly 3 is improved.
In some embodiments, the assembled battery module further includes two third end plate assemblies 13, and the two third end plate assemblies 13 are respectively disposed at outermost sides of the cell units. The third end plate assembly 13 is fixedly connected with the battery cell module 1 positioned at the outermost side of the battery cell unit; the third end plate assembly 13 is provided with a third connecting portion, and the third connecting portion is arranged on a side surface of the third end plate assembly 13 far away from the battery cell module 1.
The third end plate component 13 in the invention adopts a metal die-casting structure, and the first end plate component 2 and the second end plate component 3 respectively adopt an injection molding structure.
According to the invention, the third end plate assembly 13 is positioned on the outermost side of two ends of the cell unit, and the third end plate assembly 13, the cell module 1 positioned on the outermost side of the cell unit, and the first end plate assembly 2 or the second end plate assembly 3 connected with the cell module 1 on the outermost side are bound and fixed by adopting the binding pieces, so that the modular design is realized.
In some embodiments, as shown in fig. 3, the first connecting portion 10 and the second connecting portion 11 are respectively provided with a connecting hole in a vertical direction, and the fastener includes a bolt assembly.
After the first connecting portion 10 and the second connecting portion 11 are spliced, the bolt assembly sequentially penetrates through the connecting holes in the first connecting portion 10 and the connecting holes in the second connecting portion 11, is aligned in the vertical direction, and is fixedly connected through the bolt assembly.
In some embodiments, as shown in fig. 4, the first connection part 10 and the second connection part 11 respectively include a connection column on which the connection hole is disposed and an accommodation groove disposed above or below the connection column in a vertical direction;
the connecting columns on the first connecting portions 10 and the connecting columns on the second connecting portions 11 are arranged in a staggered mode in the vertical direction, and the accommodating grooves on the first connecting portions 10 and the accommodating grooves on the second connecting portions 11 are arranged in a staggered mode in the vertical direction.
In some embodiments, the battery cell includes two poles, and the two poles are respectively disposed at two ends of the battery cell in the length direction. As shown in fig. 5, two terminals of the adjacent battery cells on the same side in the battery cell module 1 are connected by a first busbar assembly, and terminals of the two battery cells on the same side in the two battery modules are connected by a second busbar assembly 7.
In some embodiments, as shown in fig. 6 and 7, the second busbar assembly 7 includes a connecting plate and two connecting seats;
two connecting seats respectively with the utmost point post fixed connection of two electric cores that the homonymy is adjacent, the tip of connecting seat is equipped with the fixed part that is used for fixed connection board, the connecting plate pass through the fixed part respectively with two connecting seats fixed connection.
The second busbar assembly 7 is used for connecting the poles of two adjacent battery cells positioned on the same side of two adjacent battery modules, and the second busbar assembly 7 is respectively in bolt connection with the battery cell modules 1 on two sides of the second busbar assembly, so that the subsequent maintenance is facilitated, or the battery cell modules 1 in the battery cell unit are integrally replaced.
In some embodiments, as shown in fig. 8 and 9, the binding member includes at least one binding band 4, the binding band 4 fixes the battery cell module 1 in the vertical direction, the first end plate assembly 2, the second end plate assembly 3, and the third end plate assembly 13 are respectively provided with a limiting groove for accommodating the binding band 4, and the limiting groove is disposed in the vertical direction.
When the binding belt 4 is adopted for binding, the parts which are in contact with the first end plate assembly 2, the second end plate assembly 3 and the third end plate assembly 13 are tightly attached in the limiting grooves and are not in structural contact with the adjacent battery cell modules 1, so that the binding belt 4 is prevented from being abraded or broken. When the bound battery cell module 1 is located at the outermost side of the battery cell unit, the third end plate assembly 13, the battery cell module 1, and the first end plate assembly 2 or the second end plate assembly 3 fixedly connected with the battery cell module 1 are bound into a whole by the binding band 4; when the battery cell module 1 that is binded is located the inboard of electric core unit, bandage 4 bindes electric core module 1 to and be located the first end plate subassembly 2 and the second end plate subassembly 3 of this electric core module 1 both sides and bind as a whole, realize the modular design of electric core unit.
In some embodiments, as shown in fig. 10 and 11, the assembled battery module further includes two opposite side plates 5, the two side plates 5 are disposed on two sides of the cell unit in the length direction, and the side plates 5 are detachably connected to the first end plate assembly 2, the second end plate assembly 3, and the third end plate assembly 13, respectively.
In some embodiments, an insulating plate 6 is further disposed between the side plate 5 and the cell unit.
In the invention, the insulating plate 6 is adhered to the inner side of the side plate 5 and used for protecting the second busbar assembly 7 in the cell unit so as to play an insulating protection role.
In some embodiments, the end faces of the first end plate assembly 2, the second end plate assembly 3 and the third end plate assembly 13 close to the side plate 5 are respectively provided with a fixing hole, and the side plate 5 is fixed on the fixing holes by a fixing member.
The end surfaces of the first end plate assembly 2, the second end plate assembly 3 and the third end plate assembly 13, which are close to one side of the side plate 5, are respectively provided with fixing holes, and copper nuts are respectively and independently embedded and injected in the fixing holes and are used for being connected with the side plate 5 through bolts, so that the overall structural strength of the battery module can be greatly improved.
According to the invention, adjacent cells in the cell module 1, and cells and the first end plate assembly 2, the second end plate assembly 3 or the third end plate assembly 13 are bonded and fixed by using structural adhesives, the number of cells assembled in the cell module 1 can be adjusted according to actual requirements, and the adjustment of the positions of the first end plate assembly 2 and the second end plate assembly 3 in the cell unit is realized.
The invention provides an assembly method of a combined battery module, which comprises the following steps:
(1) respectively placing the first end plate assembly 2, the second end plate assembly 3 and the third end plate assembly 13 at two ends of the battery cell module 1, and binding and fixing by adopting a binding belt 4;
(2) the first end plate component 2 and the second end plate component 3 of the adjacent battery cell modules 1 are mutually inserted and bolted to realize the splicing among the battery cell modules 1;
(3) connecting two adjacent battery cell modules 1 by using an electric connecting piece 7 through bolts to obtain a battery cell unit;
(4) arranging side plates 5 at two sides of the electric core unit, and bonding insulating plates 6 on the surfaces of the side plates 5 close to the electric core unit;
(5) the first fixing piece 8 penetrates through the side plate 5 and is connected with a fixing hole of the first end plate assembly 2 of the battery cell module 1, the second fixing piece 9 penetrates through the side plate 5 and is connected with a fixing hole of the second end plate assembly 3 of the battery cell module 1, the third fixing piece 14 penetrates through the side plate 5 and is connected with a fixing hole of the third end plate assembly 13 of the battery cell module 1, and therefore connection of the battery cell unit and the side plate 5 is achieved.
According to the assembling method provided by the invention, the battery cell units are formed by respectively manufacturing the plurality of battery cell modules 1 and then assembling and splicing the battery cell modules, compared with the traditional one-time integral forming method, the process difficulty is reduced, the yield and the production efficiency are improved, the manufacturing cost is reduced, and the flexibility and the variability of the internal structure of the battery cell unit are greatly improved.
In another embodiment, the present invention provides a battery pack including at least one embodiment of the assembled battery module.
Example 1
The embodiment provides a combined battery module, including electric core unit, electric core unit includes three electric core module 1 that sets gradually side by side, marks as first module, second module and third module respectively. The first module comprises seven electric cores which are sequentially stacked, a third end plate assembly 13 of a metal die-casting structure is bonded to one end of the first module, and a second end plate assembly 3 of an injection molding structure is bonded to the other end of the first module; the second module comprises thirteen battery cells which are sequentially stacked, and a first end plate assembly 2 and a second end plate assembly 3 which are both injection molding structures are respectively bonded at two ends of the second module; the third module includes seventeen electric cores that stack gradually, and the one end of third module bonds and has injection moulding structure's first end plate subassembly 2, and the other end bonds the third end plate subassembly 13 of metal die-casting structure. The bonding is carried out by adopting structural adhesive.
Binding and fixing the corresponding third end plate assembly 13, the first module and the second end plate assembly 3 by adopting two binding bands 4; adopt two bandages 4 to bind corresponding first end plate subassembly 2, second module and second end plate subassembly 3 fixedly, adopt two bandages 4 to bind corresponding first end plate subassembly 2, third module and third end plate subassembly 13 fixedly respectively.
Be equipped with first connecting portion 10 on the first end board subassembly 2, be equipped with second connecting portion 11 on the second end board subassembly 3, first connecting portion 10 and second connecting portion 11 splice in vertical direction to fix through the fastener. The first connecting portion 10 and the second connecting portion 11 are respectively provided with a connecting hole in the vertical direction, and the fastening piece is a bolt. After the first connecting portion 10 and the second connecting portion 11 are spliced, bolts sequentially penetrate through connecting holes in the first connecting portion 10 and connecting holes in the second connecting portion 11, are aligned in the vertical direction, and are fixedly connected through bolt assemblies, so that the mutual inserting and bolting matching structure of the first module and the second module and the mutual inserting and bolting matching structure of the second module and the third module are realized.
The battery cell of the first module, the second module and the third module respectively comprises two polar columns, and the two polar columns are respectively arranged at two ends of the battery cell in the length direction. Two adjacent utmost point posts pass through first busbar subassembly and connect, and the utmost point posts of two adjacent electric cores of first module and second module pass through second busbar subassembly 7 and connect, and the utmost point posts of two adjacent electric cores of second module and third module pass through second busbar subassembly 7 and connect.
The second busbar assembly 7 comprises a connecting plate and two connecting seats, the two connecting seats are respectively fixedly connected with the pole posts, the end parts of the connecting seats are provided with fixing parts for fixing the connecting plate, and the connecting plate is respectively fixedly connected with the two connecting seats through the fixing parts. The second busbar assembly 7 is respectively bolted to the cell modules 1 on both sides thereof, so that subsequent maintenance is facilitated, or the cell modules 1 inside the cell unit are integrally replaced.
The both sides of electric core unit are provided with curb plate 5 respectively, and curb plate 5 is close to one side surface bonding insulation board 6 of electric core module 1, and the surface of insulation board 6 has been seted up and has been dodged the breach. The end faces of the first end plate assembly 2, the second end plate assembly 3 and the third end plate assembly 13, which are close to one side of the side plate 5, are respectively provided with a fixing hole, and copper nuts are respectively embedded and injected. The first fixing piece 8 penetrates through the side plate 5 and the avoidance notch and is connected with the copper nut of the first end plate assembly 2, the second fixing piece 9 penetrates through the side plate 5 and the avoidance notch and is connected with the copper nut of the second end plate assembly 3, the third fixing piece 14 penetrates through the side plate 5 and is connected with the copper nut of the third end plate assembly 13 of the core module 1, and the side plate 5 and the core unit are fixedly bolted.
Example 2
This embodiment provides a battery pack, which includes two assembled battery modules in embodiment 1 that are disposed side by side, wherein the structural features and the working principle of the assembled battery modules are completely the same as those of embodiment 1, and are not described herein again.
The battery pack also includes the components required for the battery pack, such as the case, end plates, and control assembly, as disclosed in the prior art and well known to those skilled in the art.
The inside modular design of battery module in the battery package that this embodiment provided for the battery module obtains very big promotion in the aspect of structural diversity, manufacturability, maintainability replaceability, and the battery module makes the degree of difficulty and reduces by a wide margin simultaneously, and production efficiency is higher, the demand in adaptation market that can be better.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The combined battery module is characterized by comprising a battery cell unit, wherein the battery cell unit comprises at least two battery cell modules which are arranged side by side, and the battery cell modules comprise at least two battery cells which are sequentially stacked along the thickness direction of the battery cell modules;
two adjacent electric core module is followed the thickness direction end to end connection of electric core, two adjacent electric core module's link is equipped with first end board subassembly and second end board subassembly respectively, first end board subassembly with the second end board subassembly is spliced fixedly each other to with two adjacent electric core module fixed connection, electric core module is fixed for a whole through binding.
2. The assembled battery module according to claim 1, wherein the first end plate assembly is provided with a first connecting portion, the second end plate assembly is provided with a second connecting portion, and the first connecting portion and the second connecting portion are vertically spliced and fixed by a fastener;
the combined battery module also comprises two third end plate assemblies, and the two third end plate assemblies are respectively arranged at the outermost sides of the battery cell units;
the third end plate assembly is fixedly connected with the battery cell module positioned at the outermost side of the battery cell unit;
and a third connecting part is arranged on the third end plate assembly, and the third connecting part is arranged on one side surface of the third end plate assembly, which is far away from the battery cell module.
3. The assembled battery module according to claim 2, wherein the first connecting part and the second connecting part are respectively provided with a connecting hole in a vertical direction, and the fastening member comprises a bolt assembly;
after the first connecting portion and the second connecting portion are spliced, the bolt assembly sequentially penetrates through the connecting holes in the first connecting portion and the connecting holes in the second connecting portion, and is aligned in the vertical direction to be fixedly connected.
4. The assembled battery module according to claim 3, wherein the first and second connecting parts respectively include a connecting post and a receiving groove, the connecting hole is provided on the connecting post, and the receiving groove is provided above or below the connecting post in a vertical direction;
the connecting columns on the first connecting parts and the connecting columns on the second connecting parts are arranged in a staggered mode in the vertical direction, and the accommodating grooves on the first connecting parts and the accommodating grooves on the second connecting parts are arranged in a staggered mode in the vertical direction.
5. The assembled battery module according to claim 1, wherein the battery core comprises two poles, and the two poles are respectively arranged at two ends of the battery core in the length direction;
two adjacent polar columns on the same side of the battery cell in the battery cell module are connected through a first busbar assembly;
the poles of the battery cells adjacent to each other on the same side in the two battery modules are connected through a second bus bar assembly.
6. The assembled battery module according to claim 5, wherein the second bus bar assembly comprises a connection plate and two connection holders;
two the connecting seat is adjacent with the homonymy respectively two the electric core the utmost point post fixed connection, the tip of connecting seat is equipped with the fixed part that is used for the fixed connection board, the connecting plate passes through the fixed part respectively with two connecting seat fixed connection.
7. The assembled battery module according to claim 2, wherein the binding member comprises at least one binding band, the binding band is used for fixing the battery cell modules in the vertical direction, the first end plate assembly, the second end plate assembly and the third end plate assembly are respectively provided with a limiting groove for accommodating the binding band, and the limiting grooves are arranged in the vertical direction.
8. The assembled battery module of claim 2, further comprising two side plates disposed opposite to each other, wherein the two side plates are disposed on two sides of the cell unit in the length direction, and the side plates are detachably connected to the first end plate assembly, the second end plate assembly and the third end plate assembly, respectively;
an insulating plate is further arranged between the side plate and the battery cell unit.
9. The assembled battery module according to claim 8, wherein fixing holes are respectively formed in end surfaces of the first end plate assembly, the second end plate assembly and the third end plate assembly on a side close to the side plates, and the side plates are fixed to the fixing holes by fixing members.
10. A battery pack, comprising at least one assembled battery module according to any one of claims 1 to 9.
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| CN116995350A (en) * | 2023-09-22 | 2023-11-03 | 比亚迪股份有限公司 | Battery pack and vehicle |
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| CN115084748B (en) | 2023-07-07 |
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