CN118057663A - Soft packet of electric core subassembly and battery package - Google Patents

Soft packet of electric core subassembly and battery package Download PDF

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Publication number
CN118057663A
CN118057663A CN202211456545.4A CN202211456545A CN118057663A CN 118057663 A CN118057663 A CN 118057663A CN 202211456545 A CN202211456545 A CN 202211456545A CN 118057663 A CN118057663 A CN 118057663A
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CN
China
Prior art keywords
plate
battery cell
shaped
bus bar
electric core
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.)
Pending
Application number
CN202211456545.4A
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Chinese (zh)
Inventor
朱立德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weilai Battery Technology Anhui Co ltd
Original Assignee
Weilai Battery Technology Anhui Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Weilai Battery Technology Anhui Co ltd filed Critical Weilai Battery Technology Anhui Co ltd
Priority to CN202211456545.4A priority Critical patent/CN118057663A/en
Publication of CN118057663A publication Critical patent/CN118057663A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • 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 & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention relates to the technical field of batteries, and particularly provides a soft-package battery cell assembly and a battery package. Specifically, the soft package battery cell assembly comprises a plurality of battery cell units which are arranged side by side along a first direction, two adjacent battery cell units are connected in series through a first bus bar, each battery cell unit comprises a plate-shaped temperature regulating member and a plurality of battery cell groups which are distributed along a second direction, the two adjacent battery cell groups are connected in series through the second bus bar, each battery cell group comprises a plurality of battery cell units which are arranged side by side along the first direction and are connected in parallel, each battery cell unit is provided with two first side surfaces which are oppositely arranged along the first direction and two second side surfaces which are oppositely arranged along the second direction, each first side surface is the side surface with the largest area in each battery cell unit, and the plate-shaped temperature regulating member is attached to the first side surface. According to the invention, the arrangement of the soft package battery cells is optimized, so that a larger number of battery cells can be installed in the battery pack under the same volume compared with the existing module soft package, and the energy density of the battery pack is improved.

Description

Soft packet of electric core subassembly and battery package
Technical Field
The invention relates to the technical field of batteries, and particularly provides a soft-package battery cell assembly and a battery package.
Background
Along with the improvement of the endurance mileage requirement of the electric automobile by users, the battery pack is developed on the road facing high energy, and among the existing battery cell types, the soft-pack battery cells are more and more widely focused by virtue of the advantage of high energy density, and how to arrange the soft-pack battery cells so as to obtain higher whole-pack energy density is an important research direction.
In the prior art, most of soft package battery cells are arranged in modules, and a plurality of modules form a whole package, so that the energy density is not ideal.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
The invention aims to solve the technical problems, namely the problem that the energy density of the traditional soft package battery is not ideal enough.
In a first aspect, the invention provides a soft package battery core assembly, the battery core assembly includes a plurality of battery core units arranged side by side along a first direction, two adjacent battery core units are connected in series through a first busbar, the battery core units include a plurality of battery core groups distributed along a second direction, two adjacent battery core groups are connected in series through a second busbar, the battery core groups include a plate-shaped temperature adjusting member and a plurality of battery core monomers arranged side by side and connected in parallel along the first direction, the battery core monomers have two first side surfaces arranged opposite along the first direction and two second side surfaces arranged opposite along the second direction, the first side surfaces are side surfaces with the largest area in the battery core monomers, positive lugs and negative lugs of the battery core monomers extend out from the two second side surfaces respectively, the plate-shaped temperature adjusting member is attached to the first side surfaces, and the first direction is perpendicular to the second direction.
In the preferred technical scheme of the soft package battery core assembly, the end part of the battery core unit is provided with a third bus bar, the third bus bar comprises a plate-shaped body and tab connecting plates which are arranged at two ends of the plate-shaped body and are oppositely arranged along the first direction, the tab connecting plates are vertically arranged with the plate-shaped body, the first bus bar comprises a first connecting plate and a second connecting plate which are distributed along the first direction, the first connecting plate and the second connecting plate are respectively connected with the plate-shaped bodies of the third bus bars of the adjacent two battery core units, and the tab connecting plates are electrically connected with positive tabs or negative tabs which are positioned at the end parts of the battery core unit.
In the preferred technical scheme of the soft-package battery core assembly, the first bus bar is made of a flexible material, and an arch-shaped groove is formed between the first connecting plate and the second connecting plate, so that the first connecting plate and the second connecting plate can move relatively along the first direction and the second direction.
In the preferred technical scheme of the soft-package battery cell assembly, the end part of the battery cell unit is provided with a fixing member arranged on the plate-shaped temperature adjusting member, the fixing member is provided with a first clamping structure, the third busbar is provided with a second clamping structure, and the first clamping structure is matched with the second clamping structure in a clamping manner so as to clamp and fix the third busbar on the fixing member.
In the preferred technical solution of the soft package battery core assembly, the fixing member is further provided with a positioning structure, the first connecting plate and the second connecting plate of the first bus bar are respectively provided with a first positioning hole and a second positioning hole, the plate-shaped body of the third bus bar is provided with a third positioning hole, the positioning structure on the fixing member at the first end of the battery core unit sequentially passes through the third positioning hole and the first positioning hole to enable the first connecting plate to be aligned with the plate-shaped body of the third bus bar at the first end of the battery core unit, and the positioning structure on the fixing member at the second end of the other battery core unit sequentially passes through the third positioning hole and the second positioning hole to enable the second connecting plate to be aligned with the plate-shaped body of the third bus bar at the second end of the battery core unit.
In the preferred technical scheme of the soft-package battery core assembly, the positioning structure is a circular positioning column, one of the first positioning hole and the second positioning hole is a first circular hole, the other of the first positioning hole and the second positioning hole is a waist-shaped hole extending along the first direction, the width of the waist-shaped hole is larger than the inner diameter of the first circular hole, the third positioning hole is a second circular hole, and the outer diameter of the circular positioning column is matched with the inner diameter of the first circular hole and the inner diameter of the second circular hole.
In the preferred technical scheme of the soft package battery core assembly, the first clamping structure comprises a plurality of clamping grooves, the second clamping structure comprises a plurality of clamping claws matched with the clamping grooves, and the clamping claws are clamped in the corresponding clamping grooves.
In the preferred technical scheme of the soft-package battery core assembly, the third busbar is made of a plurality of layers of aluminum foils.
In the preferred technical solution of the soft package battery core assembly, the second busbar includes two first plate-shaped connection portions disposed opposite to each other along the first direction and a second plate-shaped connection portion disposed between the two first plate-shaped connection portions, two ends of the second plate-shaped connection portion are respectively connected with the two first plate-shaped connection portions perpendicularly, and the first plate-shaped connection portions are electrically connected with the positive tab and the negative tab.
In a second aspect, the invention also provides a battery pack, which comprises the soft-pack cell assembly.
Under the condition of adopting the technical scheme, the arrangement of the soft package battery cells is optimized, so that a larger number of battery cells can be installed in the battery pack with the same volume compared with the existing module soft package, and the energy density of the battery pack is improved.
Furthermore, the third bus bar is arranged at the end part of the battery cell unit, the lug at the end part of the battery cell unit is electrically connected with the first bus bar through the third bus bar, and the lug can be directly lapped on lug connecting plates at two sides of the third bus bar for welding without bending the lug, so that the manufacturing cost of a tooling development and production line can be reduced.
Furthermore, the arched grooves are formed between the two connecting plates of the first busbar, so that the first busbar can adapt to assembly tolerances of a plurality of battery cell monomers, and assembly is facilitated.
Furthermore, when the battery cell assembly is assembled, the third bus bar can be clamped and fixed on the fixing member positioned at the end part of the battery cell unit through the first clamping structure and the second clamping structure, and then the plurality of lugs positioned at the end part of the battery cell unit are welded with the third bus bar, so that the welding operation is facilitated, and the welding quality is improved.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
Fig. 1 is a schematic diagram of a cell unit according to the present invention;
FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A;
fig. 3 is a schematic diagram of a second embodiment of a cell unit according to the present invention;
FIG. 4 is an enlarged partial schematic view at B in FIG. 3;
FIG. 5 is a schematic diagram of a series connection of two adjacent cells according to the present invention;
FIG. 6 is an enlarged partial schematic view at C in FIG. 5;
FIG. 7 is a schematic view of a first bus bar of the present invention;
FIG. 8 is a schematic view of a second bus bar of the present invention;
FIG. 9 is a schematic view of a third bus bar of the present invention;
fig. 10 is a schematic structural view of a plate-shaped temperature adjusting member of the battery cell pack of the present invention.
List of reference numerals:
1. A cell unit; 11. a first end; 12. a second end; 13. a cell group; 131. a cell unit; 132. a plate-shaped temperature adjusting member; 1311. a negative electrode ear; 1312. a positive electrode tab; 1313. a first side; 1321. an inlet; 1322. an outlet; 2. a first bus bar; 21. a first connection plate; 22. a second connecting plate; 23. an arched groove; 211. a first positioning hole; 221. a second positioning hole; 3. a second bus bar; 31. a first plate-like connection portion; 32. a second plate-like connection portion; 4. a third bus bar; 41. a plate-like body; 42. a tab connection plate; 43. a second clamping structure; 44. a third positioning hole; 5. a fixing member; 51. a first clamping structure; 52. and a positioning structure.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, electrically connected, or mechanically connected. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Specifically, as shown in fig. 1 to 6, the pouch battery of the present invention includes a battery cell assembly, wherein the battery cell assembly includes a plurality of battery cells 1 arranged side by side along a first direction (X direction as viewed in fig. 5), two adjacent battery cells 1 are connected in series through a first bus bar 2, the battery cells 1 include a plurality of battery cell groups 13 distributed along a second direction (Y direction as viewed in fig. 5), two adjacent battery cell groups 13 are connected in series through a second bus bar 3, and the battery cell groups 13 include a plate-shaped temperature adjusting member and a plurality of battery cell units 131 arranged side by side and connected in parallel along the first direction.
The cell unit 131 has two first side surfaces 1313 which are oppositely arranged along the first direction and two second side surfaces which are oppositely arranged along the second direction, the first side surfaces 1313 are the side surfaces with the largest area in the cell unit 131, the positive electrode lug 1312 and the negative electrode lug 1311 of the cell unit 131 respectively extend out from the two second side surfaces, the plate-shaped temperature regulating member 132 is attached to the first side surfaces 1313, and the first direction is perpendicular to the second direction.
According to the invention, a plurality of battery core monomers 131 are arranged side by side along a first direction, the battery core monomers 131 are connected in parallel to form a battery core group 13, namely, an nP 1S battery core group, n is an integer larger than 1, then a plurality of battery core groups 13 distributed in a second direction are connected in series through a second bus bar 3 to form a battery core unit 1, namely, nPmS battery core units, m is an integer larger than 1, the plurality of battery core groups 13 in the battery core unit 1 are arranged in a straight line shape, and finally, the plurality of battery core units 1 are arranged side by side along the first direction, and two adjacent battery core units 1 are connected in series through a first bus bar 2 to form a battery core assembly with a CTP structure.
For example, n=4, m=4, that is, each cell group 13 is formed by connecting 4 cell units 131 in parallel to form a 4P 1S cell group, each cell unit 1 is formed by connecting 4 cell groups 13 in series to form a 4P4S cell unit, then 24 cell units 1 are arranged side by side, and two adjacent cell units 1 are connected in series through the first bus bar 2 to form a 4P96S cell assembly.
It should be noted that, the number of the battery cells 1 is not limited to the above 24, the number of the battery cell groups 13 in each battery cell unit 1 is not limited to the above 4, and the number of the battery cell units 131 in each battery cell group 13 is not limited to the above 4, and those skilled in the art can flexibly set the number of the battery cell units 1, the number of the battery cell groups 13 in each battery cell unit 1, and the number of the battery cell units 131 in each battery cell group 13 according to actual needs.
In addition, in practical application, the plate-shaped temperature adjusting members 132 of the plurality of battery cell groups 13 in the same battery cell unit 1 may be mutually communicated, as shown in fig. 10, the plurality of plate-shaped temperature adjusting members 132 in the same battery cell unit 1 may be integrally provided, or the plurality of plate-shaped temperature adjusting members 132 in the same battery cell unit 1 may be independently provided, which is not deviated from the principle and scope of the present invention and should be limited in the protection scope of the present invention.
Of course, as shown in fig. 1, 2 and 10, it is preferable that a plurality of plate-shaped temperature adjusting members 132 located in the same cell unit 1 are integrally provided, a plurality of flow passages are provided in the plate-shaped temperature adjusting members 132, an inlet 1321 and an outlet 1322 communicating with the flow passages are provided at both ends of the plate-shaped temperature adjusting members 132, respectively, and when cold water is injected into the plate-shaped temperature adjusting members 132, the cell group 13 is cooled, and when hot water is injected into the plate-shaped temperature adjusting members 132, the cell group 13 is heated.
Preferably, as shown in fig. 1, 5 and 8, the second busbar 3 of the present invention includes two first plate-shaped connection parts 31 disposed opposite to each other and a second plate-shaped connection part 32 disposed between the two first plate-shaped connection parts 31, both ends of the second plate-shaped connection part 32 are respectively connected perpendicularly to the two first plate-shaped connection parts 31, and the first plate-shaped connection parts 31 are electrically connected to the positive electrode tab 1312 and the negative electrode tab 1311 of the cell stack 13.
The second busbar 3 has an approximately U-shaped structure, and when it is mounted, the opening of the second busbar 3 is directed downward, and the second busbar is inserted between the two cell groups 13, and a part of the first plate-shaped connecting portion 31 is bonded to and welded to the negative electrode tab 1311 of the cell group 13 on one side thereof, and another part of the first plate-shaped connecting portion 31 is bonded to and welded to the positive electrode tab 1312 of the cell group 13 on the other side thereof, so that the adjacent two cell groups 13 are connected in series.
Compared with the bus bars in the prior art, the second bus bar 3 does not need to be grooved, and is large in current carrying area and high in overcurrent capacity.
It should be noted that, in practical applications, a person skilled in the art may set the specific width of the first plate-shaped connection portion 31 according to factors such as the size of the soft pack battery, the number of the battery cell groups 13 in each battery cell unit 1, and when the battery cell groups 13 in one battery cell unit 1 need to be connected in series by the plurality of second bus bars 3, the first plate-shaped connection portions 31 of the plurality of second bus bars 3 may be set to different widths.
As shown in fig. 5, for example, if one cell unit 1 is composed of 4 cell groups 13 connected in series, 3 second bus bars 3 are required, wherein the width of the first plate-shaped connection portion 31 of the second bus bar 3 located in the middle is larger than the width of the first plate-shaped connection portions 31 of the second bus bars 3 located at both sides thereof.
Preferably, as shown in fig. 1 to 7 and 9, the end of the battery cell 1 of the present invention is provided with a third bus bar 4, and the tab at the end of the battery cell 1 is electrically connected to the first bus bar 2 through the third bus bar 4.
The third bus bar 4 includes a plate-shaped body 41 and tab connection plates 42 disposed at two ends of the plate-shaped body 41 and disposed opposite to each other along a first direction, the tab connection plates 42 are disposed perpendicular to the plate-shaped body 41, the first bus bar 2 includes a first connection plate 21 and a second connection plate 22 distributed along the first direction, the first connection plate 21 and the second connection plate 22 are respectively connected with the plate-shaped body 41 of the third bus bar 4 of two adjacent battery cells 1, and the tab connection plates 42 are electrically connected with a positive tab 1312 or a negative tab 1311 located at an end of the battery cell 1.
Through setting up the third busbar 4 at the tip of electric core unit 1, the utmost point ear that is located the tip of electric core unit 1 passes through the third busbar 4 and is connected with first busbar 2 electricity, and the utmost point ear can directly overlap joint weld at the utmost point ear connecting plate 42 of third busbar 4 both sides, need not to buckle the utmost point ear to can reduce the manufacturing cost of frock development and production line.
Illustratively, each cell unit 1 includes two third bus bars 4, the two third bus bars 4 are respectively disposed at the first end 11 and the second end 12 of the cell unit 1, the negative tab 1311 disposed at the first end 11 of the cell unit 1 is electrically connected to the tab connection plate 42 of the third bus bar 4 disposed at the first end 11 of the cell unit 1, and the positive tab 1312 disposed at the second end 12 of the cell unit 1 is electrically connected to the tab connection plate 42 of the third bus bar 4 disposed at the second end 12 of the cell unit 1.
When two adjacent battery cells 1 need to be connected in series, the plurality of negative lugs 1311 at the first end 11 of the battery cell 1 are respectively welded after being overlapped with the two lug connection plates 42 of the third busbar 4 disposed at the first end 11 of the battery cell 1, the plate-shaped body 41 of the third busbar 4 is welded with the first connection plate 21 of the first busbar 2, and the plurality of positive lugs 1312 at the second end 12 of the other battery cell 1 are respectively welded after being overlapped with the two lug connection plates 42 of the third busbar 4 disposed at the second end 12 of the battery cell 1, and the plate-shaped body 41 of the third busbar 4 is welded with the second connection plate 22 of the first busbar 2, thereby connecting the two adjacent battery cells 1 in series.
Preferably, as shown in fig. 5,6 and 7, the first bus bar 2 of the present invention is made of a flexible material and is provided with an arch-shaped groove 23 between the first connection plate 21 and the second connection plate 22 so that the first connection plate 21 and the second connection plate 22 can relatively move in the first direction as well as the second direction.
By providing the arched groove 23 between the first connection plate 21 and the second connection plate 22 of the first bus bar 2, the first bus bar 2 can adapt to assembly tolerances of the plurality of battery cells 131, thereby facilitating assembly.
The first busbar 2 is preferably made of a multi-layered aluminum foil.
Preferably, as shown in fig. 1 to 4 and 9, the end of the battery cell unit 1 of the present invention is provided with a fixing member 5 mounted on the plate-shaped temperature adjusting member 132, the fixing member 5 is provided with a first clamping structure 51, the third busbar 4 is provided with a second clamping structure 43, and the first clamping structure 51 and the second clamping structure 43 are matched in a clamping way so as to clamp the third busbar 4to the corresponding fixing member 5.
During assembly, the third busbar 4 is clamped and fixed onto the fixing member 5 through the first clamping structure 51 and the second clamping structure 43, and then a plurality of lugs at the end part of the battery cell unit 1 are welded with the lug connecting plates 42 of the third busbar 4, so that welding operation is facilitated, and welding quality is improved.
Illustratively, each cell unit 1 includes two fixing members 5, the two fixing members 5 are respectively disposed at a first end 11 and a second end 12 of the cell unit 1, and the third bus bars 4 disposed at both ends of the cell unit 1 are respectively fastened to the two fixing members 5.
It should be noted that, in practical applications, those skilled in the art may set the first clamping structure 51 and the second clamping structure 43 to a structure in which the clamping groove is matched with the clamping jaw, or set the clamping opening to be matched with the clamping hook, etc., and such modifications and changes to the specific structural forms of the first clamping structure 51 and the second clamping structure 43 do not deviate from the principle and scope of the present invention, and should be limited to the protection scope of the present invention.
Preferably, as shown in fig. 1 to 4 and 9, the first clamping structure 51 includes a plurality of clamping grooves, and the second clamping structure 43 includes a plurality of clamping claws adapted to the clamping grooves, and the clamping claws are clamped in the corresponding clamping grooves.
Illustratively, the first clamping structure 51 includes four clamping grooves formed on the fixing member 5, and the second clamping structure 43 includes four claws provided on the third busbar 4, which are respectively clamped in the four clamping grooves when mounted.
Preferably, as shown in fig. 1 to 7 and 9, the fixing member 5 is further provided with a positioning structure 52, the first connection plate 21 and the second connection plate 22 of the first bus bar 2 are respectively provided with a first positioning hole 211 and a second positioning hole 221, the plate-shaped body 41 of the third bus bar 4 is provided with a third positioning hole 44, and the positioning structure 52 on the fixing member 5 at the first end 11 of the cell unit 1 sequentially passes through the third positioning hole 44 and the first positioning hole 211 to align the first connection plate 21 of the first bus bar 2 with the plate-shaped body 41 of the third bus bar 4 at the first end 11 of the cell unit 1, and the positioning structure 52 on the fixing member 5 at the second end 12 of the other cell unit 1 sequentially passes through the third positioning hole 44 and the second positioning hole 221 to align the second connection plate 22 of the first bus bar 2 with the plate-shaped body 41 of the third bus bar 4 at the second end 12 of the cell unit 1.
Illustratively, in mounting, the positioning structure 52 on the fixing member 5 at the first end 11 of the cell unit 1 passes through the third positioning hole 44 on the third bus bar 4 (at the first end 11 of the cell unit 1) and the first positioning hole 211 on the first connection plate 21 of the first bus bar 2 to align the first connection plate 21 of the first bus bar 2 with the plate-shaped body 41 of the third bus bar 4, and the positioning structure 52 on the fixing member 5 at the second end 12 of the other cell unit 1 passes through the third positioning hole 44 on the third bus bar 4 (at the second end 12 of the other cell unit 1) and the second positioning hole 221 on the second connection plate 22 of the first bus bar 2 to align the second connection plate 22 of the first bus bar 2 with the plate-shaped body 41 of the third bus bar 4, and then the first connection plate 21 and the second connection plate 22 of the first bus bar 2 are welded with the plate-shaped bodies 41 of the two third bus bars 4, respectively.
It should be noted that, in practical applications, those skilled in the art may arrange the positioning structure 52 as a positioning post, a positioning plate, etc., and such modifications and changes to the specific structural form of the positioning structure 52 do not deviate from the principle and scope of the present invention, and should be limited to the protection scope of the present invention.
Preferably, as shown in fig. 1 to 7 and 9, the positioning structure 52 is a circular positioning column, the first positioning hole 211 is a waist-shaped hole extending along the first direction, the second positioning hole 221 is a first circular hole, the width of the waist-shaped hole is larger than the inner diameter of the first circular hole, the third positioning hole 44 is a second circular hole, and the outer diameter of the circular positioning column is matched with the inner diameter of the first circular hole and the inner diameter of the second circular hole.
The inner diameters of the first circular hole and the second circular hole are the same, and are substantially the same as the outer diameter of the circular positioning column, so that the inner diameters of the first circular hole and the second circular hole can be slightly larger than the outer diameter of the circular positioning column for convenience in assembly, for example, the inner diameters of the first circular hole and the second circular hole can be 1 to 2mm larger than the outer diameter of the circular positioning column.
The first positioning hole 211 is provided as a waist-shaped hole extending in the first direction, the width of which (i.e., the dimension along the height of the battery cell unit 1) is larger than the inner diameter of the first circular hole, for example, the width of which may be made larger than the inner diameter of the first circular hole by 10 to 15mm, and a specific value may be determined according to an actual assembly tolerance, so that the first bus bar 2 can be made to adapt to the tolerances in the X-direction (the width direction of the battery cell unit 1) and the Z-direction (the height direction of the battery cell unit 1), thereby facilitating assembly.
Illustratively, two circular positioning posts are disposed on each fixing member 5 at intervals along the vertical direction, two waist-shaped holes are disposed on the first connecting plate 21 of the first busbar 2 at intervals along the vertical direction, two first circular holes are disposed on the second connecting plate 22 of the first busbar 2 at intervals along the vertical direction, and two second circular holes are disposed on the third busbar 4 at intervals along the vertical direction.
It should be noted that, in practical application, the first positioning hole 211 on the first connection plate 21 of the first busbar 2 may be configured as a first circular hole, and correspondingly, the second positioning hole 221 on the second connection plate 22 of the first busbar 2 may be configured as a waist-shaped hole extending along the first direction, which is flexibly adjusted and changed without departing from the principle and scope of the present invention, and should be limited in the protection scope of the present invention.
Those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims of the present application, any of the claimed embodiments may be used in any combination.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims (10)

1. The utility model provides a soft packet of electric core subassembly, its characterized in that, electric core subassembly includes a plurality of electric core units that set up side by side along first direction, two adjacent electric core units are established ties through first busbar, electric core unit includes a plurality of electric core groups that distribute along the second direction, two adjacent electric core groups are established ties through the second busbar, electric core group includes platy temperature regulating member and a plurality of electric core monomer that set up side by side and parallelly connected along first direction, electric core monomer has two edges along the relative first side that sets up of first direction and two edges along the relative second side that sets up of second direction, first side is the biggest side of area in the electric core monomer, electric core monomer's anodal ear and negative pole ear stretch out respectively from two second side, platy temperature regulating member with first side laminating, first direction is perpendicular with the second direction.
2. The soft package battery cell assembly according to claim 1, wherein a third busbar is arranged at an end of the battery cell unit, the third busbar comprises a plate-shaped body and tab connection plates which are arranged at two ends of the plate-shaped body and are oppositely arranged along the first direction, the tab connection plates are vertically arranged with the plate-shaped body, the first busbar comprises a first connection plate and a second connection plate which are distributed along the first direction, the first connection plate and the second connection plate are respectively connected with the plate-shaped bodies of the third busbars of two adjacent battery cell units, and the tab connection plates are electrically connected with the positive tabs or the negative tabs which are positioned at the end of the battery cell unit.
3. The soft pack cell assembly of claim 2, wherein the first bus bar is made of a flexible material and an arcuate groove is provided between the first and second connection plates to enable the first and second connection plates to move relative to each other in the first and second directions.
4. The soft pack cell assembly according to claim 2, wherein the end of the cell unit is provided with a fixing member mounted on the plate-shaped temperature adjusting member, the fixing member is provided with a first clamping structure, the third busbar is provided with a second clamping structure, and the first clamping structure and the second clamping structure are matched in a clamping manner so as to clamp the third busbar to the fixing member.
5. The battery cell assembly of claim 4, wherein the fixing member is further provided with a positioning structure, the first and second connection plates of the first bus bar are respectively provided with a first positioning hole and a second positioning hole, the plate-shaped body of the third bus bar is provided with a third positioning hole, the positioning structure on the fixing member at the first end of the battery cell unit sequentially passes through the third positioning hole and the first positioning hole to align the first connection plate with the plate-shaped body of the third bus bar at the first end of the battery cell unit, and the positioning structure on the fixing member at the second end of the other battery cell unit sequentially passes through the third positioning hole and the second positioning hole to align the second connection plate with the plate-shaped body of the third bus bar at the second end of the battery cell unit.
6. The soft pack cell assembly of claim 5, wherein the positioning structure is a circular positioning post, one of the first positioning hole and the second positioning hole is a first circular hole, the other of the first positioning hole and the second positioning hole is a waist-shaped hole extending along the first direction, the width of the waist-shaped hole is larger than the inner diameter of the first circular hole, the third positioning hole is a second circular hole, and the outer diameter of the circular positioning post is matched with the inner diameter of the first circular hole and the inner diameter of the second circular hole.
7. The soft pack cell assembly of claim 4, wherein the first clamping structure comprises a plurality of clamping grooves, the second clamping structure comprises a plurality of clamping claws matched with the clamping grooves, and the clamping claws are clamped in the corresponding clamping grooves.
8. The soft pack cell assembly of claim 3, wherein the third bus bar is made of multi-layered aluminum foil.
9. The flexible package cell assembly according to any one of claims 1 to 8, wherein the second bus bar includes two first plate-shaped connection parts disposed opposite to each other in the first direction and a second plate-shaped connection part disposed between the two first plate-shaped connection parts, both ends of the second plate-shaped connection part being respectively connected perpendicularly to the two first plate-shaped connection parts, the first plate-shaped connection parts being electrically connected to the positive electrode tab and the negative electrode tab.
10. A battery pack comprising the soft pack cell assembly of any one of claims 1 to 9.
CN202211456545.4A 2022-11-21 2022-11-21 Soft packet of electric core subassembly and battery package Pending CN118057663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211456545.4A CN118057663A (en) 2022-11-21 2022-11-21 Soft packet of electric core subassembly and battery package

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211456545.4A CN118057663A (en) 2022-11-21 2022-11-21 Soft packet of electric core subassembly and battery package

Publications (1)

Publication Number Publication Date
CN118057663A true CN118057663A (en) 2024-05-21

Family

ID=91069192

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211456545.4A Pending CN118057663A (en) 2022-11-21 2022-11-21 Soft packet of electric core subassembly and battery package

Country Status (1)

Country Link
CN (1) CN118057663A (en)

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