CN117335100A - CCS assembly and battery module - Google Patents

CCS assembly and battery module Download PDF

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Publication number
CN117335100A
CN117335100A CN202311172580.8A CN202311172580A CN117335100A CN 117335100 A CN117335100 A CN 117335100A CN 202311172580 A CN202311172580 A CN 202311172580A CN 117335100 A CN117335100 A CN 117335100A
Authority
CN
China
Prior art keywords
insulating film
extension
ccs
assembly according
ccs assembly
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
CN202311172580.8A
Other languages
Chinese (zh)
Inventor
张国江
任朝举
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.)
Eve Energy Co Ltd
Original Assignee
Eve Energy 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 Eve Energy Co Ltd filed Critical Eve Energy Co Ltd
Priority to CN202311172580.8A priority Critical patent/CN117335100A/en
Publication of CN117335100A publication Critical patent/CN117335100A/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
    • H01M50/502—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
    • 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
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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 provides a CCS assembly and a battery module, wherein the CCS assembly comprises: an insulating film; the busbar group comprises output rows, connecting rows and positioning plates, wherein the two output rows are correspondingly arranged at two ends of the battery module in the length direction; the plurality of connecting rows are arranged between the two output rows; in the same end of the battery module in the length direction, the output row is at least partially supported on the corresponding positioning plate, and the positioning plate extends towards the connecting row adjacent to the output row; the insulating film is arranged at least on one side of the busbar group facing the battery core, and the busbar group is connected to the insulating film. According to the invention, the traditional plastic bracket is replaced by the insulating film, so that the production cost of the CCS assembly can be effectively reduced, the positioning plate can assist in supporting the CCS assembly, the strength or rigidity of the CCS assembly can be enhanced to a certain extent, and the subsequent transportation and processing of the CCS assembly are facilitated.

Description

CCS assembly and battery module
Technical Field
The invention relates to the technical field of batteries, in particular to a CCS assembly and a battery module.
Background
In the prior art, a CCS assembly of a cylindrical power battery module generally includes two output rows and a plurality of connection rows arranged between the two output rows, the connection rows include a plurality of conductive units, each conductive unit includes a positive electrode portion and a negative electrode portion connected to each other, the conductive units are used for connecting two adjacent cells in series, specifically, the positive electrode portion of the conductive unit is connected to the positive electrode end of one of the cells, and the negative electrode portion of the same conductive unit is connected to the negative electrode end of the other cell. The plurality of connection rows are arranged along the length direction of the battery module. To integrate CCS components, output rows and connection rows are typically integrated on plastic carriers. However, with the development of CTP or CTB trend of the battery system, the length of the battery module is gradually increased, so that the conventional plastic support is difficult to adapt to the integration requirement of the output row and the connection row in length, and meanwhile, the plastic support with a large length has the defects of high mold opening cost, difficult control of machining precision, difficult control of matching of a size chain and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a CCS component, which replaces the traditional plastic bracket by an insulating film, so that the production cost of the CCS component can be effectively reduced, the positioning plate can assist in supporting the CCS component, the strength or the rigidity of the CCS component can be enhanced to a certain extent, and the subsequent transportation and processing of the CCS component are facilitated.
Another object of the present invention is to provide a battery module that is low in cost.
The embodiment of the invention is realized by the following technical scheme:
a CCS assembly for use in a battery module, comprising: an insulating film; the busbar group comprises output rows, connecting rows and positioning plates, wherein the two output rows are correspondingly arranged at two ends of the battery module in the length direction; the plurality of connecting rows are arranged between the two output rows; in the same end of the battery module in the length direction, the output row is at least partially supported on the corresponding positioning plate, and the positioning plate extends towards the connecting row adjacent to the output row; the insulating film is arranged at least on one side of the busbar group facing the battery core, and the busbar group is connected to the insulating film.
According to a preferred embodiment, the busbar group is bonded or thermally pressed to the insulating film.
According to a preferred embodiment, the insulating film is arranged on both sides of the busbar group facing towards and away from the battery cell; the CCS component further comprises a signal acquisition part, wherein the signal acquisition part is connected with the busbar group; the signal acquisition member is located between the insulating film and the busbar set.
According to a preferred embodiment, the signal acquisition member is an FPC, the FPC includes a PI layer and a base material layer stacked together, and a nickel acquisition sheet is disposed on the base material layer to form an input end of the signal acquisition member; the PI layer is arranged between the base material layer and the busbar group, and the base material layer is arranged between the PI layer and the insulating film attached to the FPC.
According to a preferred embodiment, the signal acquisition member is an FPC, which is disposed on a side of the busbar assembly facing away from the battery cell.
According to a preferred embodiment, the insulating film is provided with a first welding hole corresponding to the collected nickel piece so as to expose the collected nickel piece.
According to a preferred embodiment, the insulating film is provided with a second welding hole penetrating therethrough, and the positive electrode portion and the negative electrode portion of the conductive unit are abutted to the battery cell through the second welding hole.
According to a preferred embodiment, the output row comprises an extension, the free end of which is connected to the cell; the positioning plate comprises a main plate, a connecting protrusion is arranged on one side surface of the main plate facing the extension part, and the connecting protrusion is supported on the extension part; the connection protrusion is away from the free end of the extension in the extension direction of the extension.
According to a preferred embodiment, the output bank comprises: an inner connecting part; the outer connecting part is connected with the inner connecting part and is arranged in a split manner; the thickness of the outer connecting part is larger than that of the inner connecting part; the extension is part of the inner connection.
According to a preferred embodiment, the inner connection comprises a body part connected to the outer connection; the main body part is kept away from one side of external connection portion is provided with the extension, the extension is used for connecting to the positive terminal or the negative terminal of electric core.
According to a preferred embodiment, the main board is provided with electrode holes therethrough, and the free ends of the extension parts are connected to the battery cells through the electrode holes.
According to a preferred embodiment, the main board is provided with a first positioning hole in a penetrating manner, the insulating film is provided with a second positioning hole, the output row is provided with a third positioning hole, and the first positioning hole, the second positioning hole and the third positioning hole are correspondingly arranged.
According to a preferred embodiment, the insulating film comprises a base film and a glue layer, the glue layer being arranged towards one side of the busbar assembly.
According to a preferred embodiment, the thickness of the base film is D1,0 μm < D1. Ltoreq.150 μm; the thickness of the adhesive layer is D2, D2 is more than 0 mu m and less than or equal to 50 mu m.
According to a preferred embodiment, the connecting projection is provided with a first rounded corner at an outer edge of a side of the extension remote from the free end of the extension in the extension direction.
According to a preferred embodiment, in the extension direction of the extension portion, the apex angle of the outer edge of the main plate near the free end of the extension portion is a second rounded corner.
According to a preferred embodiment, at least part of the connection rows are supported on the positioning plate.
A battery module comprises an electric core and the CCS assembly, wherein the electric core is connected to the busbar group through the insulating film and the positioning plate.
The technical scheme of the embodiment of the invention has at least the following advantages and beneficial effects:
(1) The invention can effectively reduce the production cost by integrating the busbar group, namely the output row, the connecting row and the positioning plate, on the insulating film, and simultaneously has the advantages of convenient cutting of the insulating film, easy control of the processing precision when being applied to a long-length battery module, convenient arrangement and adjustment of the busbar group and low processing difficulty.
(2) The positioning plates are positioned at the two ends of the CCS component in the length direction of the battery module, can assist in supporting the CCS component, can enhance the strength or rigidity of the CCS component to a certain extent, and is convenient for subsequent transportation and processing of the CCS component.
(3) According to the invention, the insulating film arranged on the side, facing the battery core, of the busbar set can effectively insulate the busbar set and the battery core, and prevent the battery core from being short-circuited.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic top view of a CCS assembly according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a CCS module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an exploded view of a CCS assembly according to an embodiment of the present invention;
FIG. 4 is a schematic perspective view of a bus bar set according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of a negative positioning plate according to an embodiment of the present invention;
fig. 6 is a schematic perspective view of a positive positioning plate according to an embodiment of the present invention;
fig. 7 is a schematic perspective view of a negative output row according to an embodiment of the present invention;
fig. 8 is a schematic front view of a negative output row according to an embodiment of the present invention;
fig. 9 is a schematic perspective view of an output row of an anode according to an embodiment of the present invention;
fig. 10 is a schematic front view of an output row of an anode according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a connection structure between an FPC and an insulating film according to an embodiment of the present invention;
fig. 12 is a schematic perspective view of a battery cell according to an embodiment of the present invention.
Icon: 1. a CCS component; 10a, a negative electrode output row; 10b, an anode output row; 10c, connecting rows; 11. an outer connection portion; 121. a main body portion; 122. an extension; 123a, a negative electrode connecting piece; 123b, positive electrode connecting pieces; 124. a bending part; 125. a third positioning hole; 13. a conductive unit; 131. a positive electrode section; 132. a negative electrode portion; 20. a battery cell; 201. a positive terminal; 202. a negative terminal; 30a, a negative electrode positioning plate; 30b, an anode positioning plate; 31. a main board; 311. a second rounded corner; 32. a connection protrusion; 321. a first rounded corner; 33. an electrode hole; 34. a first positioning hole; 4. an insulating film; 401. a base film; 402. a glue layer; 41. a second welding hole; 42. a second positioning hole; 5. an FPC; 501. p I layers; 502. a substrate layer; 51. collecting nickel sheets; 52. an NTC; 6. a connector.
Detailed Description
For a better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1 to 12, a CCS assembly includes an insulating film 4 and a bus bar group, wherein the bus bar group includes an output bar, a connection bar 10c and a positioning plate, and specifically, as shown in fig. 3 and 4, two output bars are correspondingly disposed at two ends of a battery module in a length direction; the plurality of connecting rows 10c are arranged between the two output rows; in the same end of the battery module in the length direction, the output row is at least partially supported on a positioning plate which is correspondingly arranged, and the positioning plate extends towards a connecting row 10c which is adjacent to the output row; the insulating film 4 is provided at least on the side of the bus bar group facing the battery cell 20, and the bus bar group is connected to the insulating film 4, that is, the output bar, the connection bar 10c, and the positioning plate are all connected to the insulating film 4. In this embodiment, through the mode of integrating busbar group namely output row, connecting row 10c and locating plate on insulating film 4, can effectively reduce low in production cost, insulating film 4 cuts the convenience simultaneously, is convenient for the busbar group's of being convenient for arrangement and adjustment when being applied to long length battery module to accuse machining precision easily, the processing degree of difficulty is low. The locating plates are positioned at the two ends of the CCS assembly 1 in the length direction of the battery module, can assist in supporting the CCS assembly 1, can enhance the strength or rigidity of the CCS assembly 1 to a certain extent, and is convenient for subsequent transportation and processing of the CCS assembly 1. The insulating film 4 provided on the side of the bus bar group facing the battery cell 20 can effectively insulate the bus bar group from the battery cell 20, preventing the battery cell 20 from being short-circuited.
In this embodiment, as shown in fig. 2 and 4, the output rows include a positive output row 10b and a negative output row 10a, where the positive output row 10b is at the positive output end of the battery module, the negative output row 10a is at the negative output end of the battery module, and the output row is provided with a number of connection pieces equal to the number of conductive units 13 forming a single connection row 10c, where the connection pieces on the negative output row 10a are negative connection pieces 123a for connection to the negative end 202 of the battery cell 20 at the negative output end of the battery module, and the connection pieces on the positive output row 10b are positive connection pieces 123b for connection to the positive end 201 of the battery cell 20 at the positive output end of the battery module.
Further, a second welding hole 41 is provided in the insulating film 4, and the positive electrode portion 131 and the negative electrode portion 132 of the conductive unit 13 are abutted to the battery cell 20 through the second welding hole 41. By the arrangement, the area, except the positive electrode part 131 and the negative electrode part 132 of the conductive unit 13, of the side surface, close to the battery cell 20, of the busbar set can be effectively insulated, and the safety of the battery module is guaranteed while the welding of the conductive unit 13 and the battery cell 20 is not influenced.
In this embodiment, the positioning plate is a plastic plate. The insulating film 4 includes, but is not limited to, a hot melt adhesive film.
In this embodiment, the insulating film 4 includes a base film 401 and a glue layer 402, and the glue layer 402 is disposed toward one side of the bus bar group. Further, the base film 401 layer is PET. The thickness of the base film 401 is D1, D1 is more than 0 μm and less than or equal to 150 μm; the thickness of the glue layer 402 is D2,0 μm < D2.ltoreq.50 μm.
Further, the bus bar group is bonded or thermally pressed to the insulating film 4. Preferably, the bus bar group is thermally press-connected with the insulating film 4.
As shown in fig. 3, 4 and 7 to 10, the output row includes an inner connecting portion and an outer connecting portion 11, the outer connecting portion 11 is connected with the inner connecting portion, and the inner connecting portion and the outer connecting portion are separately arranged; the thickness of the outer connection portion 11 is greater than that of the inner connection portion; the positioning plate is abutted to a side surface of the inner connecting portion facing the battery cell 20 in the thickness direction thereof. The positioning plate abutted to the inner connecting part can support the inner connecting part with small thickness, so that the structural strength of the inner connecting part is improved, and the inner connecting part can be effectively prevented from being deformed in the transportation process of the CCS assembly 1; meanwhile, the processing technology of the output bus consisting of the external connection part 11 and the internal connection part which are arranged in a split way is simple, and the production cost is low; in addition, the structural design that the thickness of the outer connecting part 11 is larger than that of the inner connecting part can effectively improve the structural strength of the output bus, so that the reliability of the connecting structure of the outer connecting part 11 and the inner connecting part can be improved when the modules are connected in series; meanwhile, the inner connection part with small thickness is convenient to be welded with the battery cell 20, and the outer connection part 11 with large thickness can ensure the overcurrent capacity of the output row.
In this embodiment, the inner connecting portion is integrally formed by press molding. The inner connection is welded to the outer connection 11. In this embodiment, the connecting piece is a part disposed at the inner connecting portion.
As shown in fig. 7 to 10, the inner connection part includes a body part 121, and the body part 121 is connected to the outer connection part 11; the main body 121 is provided with an extension 122 at a side far away from the external connection portion 11, the extension 122 is used for connecting to the positive terminal 201 or the negative terminal 202 of the battery cell 20, and the positioning plate abuts against the extension 122. Specifically, the free end of the extension 122 of the positive output row 10b is connected to the positive terminal 201 of the cell 20; the free end of extension 122 of negative output row 10a is connected to the negative terminal 202 of cell 20. The extension 122 is part of the inner connection. The extending direction of the extending portion 122 is parallel to the extending direction of the main body portion 121, and the extending portion 122 and the main body portion 121 are connected by a bending portion 124. Further, the body 121, the bending portion 124 and the extending portion 122 are integrally formed together to form an inner connecting portion. In this embodiment, the outer connecting portion 11 is disposed in the region of the main body portion 121, the outer connecting portion 11 can play a role in increasing the structural strength of the main body portion 121, and the positioning plate abutting against the extending portion 122 can play a role in increasing the structural strength of the extending portion 122, so that the structural strength of the inner connecting portion can be integrally improved, and meanwhile, the overcurrent capacity of the output row can be improved. The structural arrangement of the positioning plate abutting against the extension portion 122 can equalize the structural strength of each region of the inner connecting portion on the basis of the increased structural strength of the main body portion 121 of the outer connecting portion 11. In this embodiment, the number of the extension portions 122 is equal to the number of the connecting pieces, and the connecting pieces are disposed at the end portions of the extension portions 122 away from the outer connecting portion 11 in a one-to-one correspondence manner. In this embodiment, the connecting piece serves as a free end of the extension 122.
Of course, in another embodiment, the positioning plate may also be attached to the surface of the inner connecting portion facing the side of the battery cell 20 and extends, and the positioning plate is at least partially abutted to the extending portion 122, the bending portion 124 and the main body portion 121.
In this embodiment, as shown in fig. 3 to 6, the positioning plate is located between the extension portion 122 and the battery cell 20; the positioning plate comprises a main plate 31, a connecting protrusion 32 is arranged on one side surface of the main plate 31 facing the extension part 122, and the connecting protrusion 32 is supported on the extension part 122; the connecting projection 32 is distant from the free end of the extension 122 in the extension direction of the extension 122. That is, the connection protrusion 32 is provided near one side of the outer connection portion 11, in other words, the root of the extension 122 is supported on the connection protrusion 32. By the arrangement, the position of the positioning plate supporting extension part 122 can be closer to one side of the outer connecting part 11, the situation that the positioning plate excessively supports the extension part 122 to weaken the bending capability of the positioning plate towards one side of the battery cell 20 or away from one side of the battery cell 20 can be avoided, namely, the structural design of the connecting protrusion 32, which is arranged on one side of the connecting protrusion 32, close to the outer connecting part 11 can strengthen the structural strength of the supporting extension part 122, and meanwhile, the deformation capability of the supporting extension part towards the battery cell 20 or away from the battery cell 20 can be not influenced, so that the connection of the structure of the subsequent extension part 122 and the battery cell 20 is facilitated, and the cold welding between the structure and the battery cell 20 is avoided.
As shown in fig. 5 and 6, the negative electrode positioning plate 30a and the positive electrode positioning plate 30b provided in this embodiment have the same function, and the shape can be designed according to the shape adaptability of the negative electrode output row 10a and the positive electrode output row 10b according to the need, and the present invention is not limited in particular. The positive electrode positioning plate 30b is located on the positive electrode output row 10b side, and the negative electrode positioning plate 30a is located on the negative electrode output row 10a side.
In this embodiment, the main board 31 is provided with an electrode hole 33 therethrough, and the free end (connection piece) of the extension portion 122 is connected to the positive terminal 201 or the negative terminal 202 of the battery cell 20 through the electrode hole 33. The electrode hole 33 is used to expose the positive electrode terminal 201 and the negative electrode terminal 202 of the cell 20 adjacent to the output row, and the electrode hole 33 is disposed corresponding to the second soldering hole 41 on the insulating film 4 adjacent to the output row. When the CCS assembly 1 is assembled with the battery cell 20, the electrode hole 33 is beneficial to positioning and assembling the CCS assembly 1 and the battery cell 20 in the battery module, and can effectively improve the assembly efficiency and the assembly precision of the CCS assembly 1.
As shown in fig. 1 to 3, in the present embodiment, preferably, both sides of the busbar group facing toward and away from the battery cell 20 are provided with insulating films 4; the CCS assembly 1 further comprises a signal collecting member, the signal collecting member is connected with the busbar assembly, specifically, the input end of the signal collecting member is correspondingly arranged on the output row and the connection row 10c; the signal pickup is located between the insulating film 4 and the busbar group. The insulating films 4 are arranged on both sides of the busbar group in the thickness direction, so that the structural strength of the CCS assembly 1 can be further improved, and the firmness of the output row and the connection row 10c after being distributed is improved. As shown in fig. 2 and 3, the two insulating films 4 on the upper and lower layers of the busbar assembly are each provided with a second welding hole 41, and when in use, the positive electrode terminal 201 and the negative electrode terminal 202 of the battery cell 20 are abutted to the output row and the connection row 10c through the second welding holes 41 of the lower insulating film 4, and the welding gun is abutted to the output row and the connection row 10c through the second welding holes 41 of the upper insulating film 4 to perform welding work.
The signal acquisition member in this embodiment may be FPC5 or may be a signal acquisition harness. Preferably, the signal pickup member is an FPC5. The thickness of which is thin, which is advantageous for reducing the thickness of the CCS assembly 1. The FPC5 extends along the length direction of the battery module, and the input end is connected to the output row and the connection row 10c to monitor the voltage or temperature signal of the battery cell 20 corresponding to the output row and the connection row 10c, and the output end of the FPC5 is at one end of the length direction of the battery module and is connected with the connector 6 for being connected to the BMS.
In this embodiment, in order to avoid that the layout of the FPC5 (mainly, the thickness of the FPC 5) affects the welding of the output and connection rows 10c and the battery cells 20, it is preferable that the signal acquisition member, that is, the FPC5, is disposed on the side of the busbar set away from the battery cells 20, that is, the signal acquisition member is located between the busbar set and the upper insulating film 4.
The FPC5 comprises a P I layer 501 and a substrate layer 502 which are stacked, wherein a nickel collecting sheet 51 and an NTC52 are arranged on the substrate layer 502 to form an input end of a signal collecting piece; p I layer 501 is located between base layer 502 and the busbar assembly, and base layer 502 is located between P I layer 501 and insulating film 4 attached to FPC5. As shown in fig. 3 and 11, the insulating film 4 (the insulating film 4 on the upper layer in this embodiment) can serve as another P I layer 501 (the conventional FPC5 includes at least two P I layers 501, the substrate layer 502 is sandwiched between the two P I layers 501), that is, the P I layer 501, the substrate layer 502 and the upper insulating film 4 stacked sequentially from bottom to top form a complete FPC5 structure, so that the cost of the FPC5 can be reduced, the FPC5 structure and the NTC52 can be effectively protected, the thickness of the FPC5, that is, the thickness of the CCS assembly 1 can be reduced, and the integrated integration rate of the CCS assembly 1 can be improved.
It should be noted that, for the output end of the FPC5, that is, the end equipped with the connector 6, the upper insulating film 4 may be used for extension protection, or a conventional P I film may be used for protection, so long as the normal use of the FPC5 is not affected.
Of course, in other embodiments, the FPC5 may also be disposed on the side of the busbar assembly facing the battery cell 20, and accordingly, the insulating film 4 (the insulating film 4 on the lower layer) disposed on the side near the battery cell 20 serves as a part of the structure of the FPC5, which is not described herein.
As shown in fig. 2 and 3, the insulating film 4 is provided with a first welding hole corresponding to the acquisition nickel piece 51 to expose the acquisition nickel piece 51. In use, the acquisition nickel sheet 51 is abutted to the output row through the first welding hole of the lower insulating film 4, and the welding gun is abutted to the acquisition nickel sheet 51 through the first welding hole of the upper insulating film 4 to perform welding of the acquisition nickel sheet 51 and the output row.
In this embodiment, the main board 31 is provided with a first positioning hole 34, the insulating film 4 is provided with a second positioning hole 42, the output row is provided with a third positioning hole 125, and the first positioning hole 34, the second positioning hole 42 and the third positioning hole 125 are correspondingly arranged. When in use, after the insulating film 4, the output row and the positioning plate are assembled, the first positioning hole 34 is coaxial with the corresponding second positioning hole 42 and third positioning hole 125, and is used for positioning and assembling the insulating film 4, the output row and the positioning plate, so that the assembly precision of the CCS assembly 1 is improved.
In the present embodiment, as shown in fig. 5 and 6, in the extending direction of the extension portion 122, the outer edge of one side of the connecting projection 32 away from the free end of the extension portion 122 is provided with a first rounded corner 321. In the extending direction of the extending portion 122, the vertex angles of the outer edges of one side of the main board 31 near the free end of the extending portion 122 are second fillets 311. The first rounded corner 321 is used for reducing stress concentration of the connecting protrusion 32 towards the outer edge of one side of the bending part 124, so that the positioning plate is convenient to be demolded, and the damage to the structure of the output row caused during the assembly of the output row can be prevented. The second rounded corners 311 serve to reduce stress concentrations at the top corners of the main board 31, i.e. the locating plate, on the side remote from the outer joint part 11, and to prevent scratching of other components of the CCS assembly 1 during assembly.
In some embodiments, at least a portion of the connecting rows 10c are supported on the locating plate. Specifically, the positioning plate extending toward the connection row 10c adjacent to the output row, that is, the main plate 31, can also provide a supporting force for the connection row 10c, so that the structural strength of the CCS assembly 1 can be further improved. In use, the main board 31 is provided with a corresponding hole structure to enable the connection row 10c to pass through the main board 31 and be connected to the battery cell 20.
There is also provided a battery module including the battery cell 20 and the CCS assembly 1 described above, the battery cell 20 being connected to the bus bar group through the insulating film 4 and the positioning plate. The safety is high and the production cost is low.
The technical means disclosed by the scheme of the invention is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (18)

1. A CCS assembly for use in a battery module, comprising:
an insulating film (4);
the busbar group comprises output rows, connecting rows (10 c) and positioning plates, wherein the two output rows are correspondingly arranged at two ends of the battery module in the length direction; the plurality of connecting rows (10 c) are arranged between the two output rows; in the same end of the battery module in the length direction, the output row is at least partially supported on the corresponding positioning plate, and the positioning plate extends towards a connecting row (10 c) adjacent to the output row;
the insulating film (4) is provided at least on a side of the busbar group facing the battery cell (20), and the busbar group is connected to the insulating film (4).
2. CCS assembly according to claim 1, characterized in that the busbar group is glued or heat-pressed to the insulating film (4).
3. CCS assembly according to claim 1, characterized in that the busbar groups are provided with the insulating film (4) on both sides facing towards and away from the cells (20);
the CCS component further comprises a signal acquisition part, wherein the signal acquisition part is connected with the busbar group;
the signal acquisition member is located between the insulating film (4) and the busbar set.
4. A CCS assembly according to claim 3, wherein the signal acquisition member is an FPC (5), the FPC (5) including a PI layer (501) and a base material layer (502) stacked, the base material layer (502) being provided with an acquisition nickel sheet (51) to form an input end of the signal acquisition member;
the PI layer (501) is positioned between the base material layer (502) and the bus bar group, and the base material layer (502) is positioned between the PI layer (501) and the insulating film (4) attached to the FPC (5).
5. A CCS assembly according to claim 3, characterized in that the signal pickup is an FPC (5), the FPC (5) being arranged on a side of the busbar assembly facing away from the cells (20).
6. The CCS assembly according to claim 4, characterized in that the insulating film (4) is provided with a first welding hole corresponding to the nickel collecting tab (51) to expose the nickel collecting tab (51).
7. CCS assembly according to claim 1, characterized in that the insulating film (4) is provided with a second soldering hole (41) through it, the positive (131) and negative (132) electrode portions of the conductive unit (13) being in abutment to the electrical core (20) through the second soldering hole (41).
8. The CCS assembly according to any one of claims 1-7, wherein said output row includes an extension (122), a free end of extension (122) being connected to a cell (20);
the positioning plate comprises a main plate (31), a connecting protrusion (32) is arranged on one side surface of the main plate (31) facing the extension part (122), and the connecting protrusion (32) is supported on the extension part (122);
the connecting projection (32) is remote from the free end of the extension (122) in the extension direction of the extension (122).
9. The CCS assembly according to claim 8, wherein said output row includes:
an inner connecting part;
an outer connecting part (11) connected with the inner connecting part and arranged in a split manner;
the thickness of the outer connecting part (11) is larger than that of the inner connecting part;
the extension (122) is part of the inner connection.
10. CCS assembly according to claim 9, characterized in that the inner connection comprises a main body portion (121), the main body portion (121) being connected to the outer connection (11);
the main body part (121) is provided with the extension portion (122) far away from one side of the outer connecting portion (11), and the extension portion (122) is used for being connected to a positive electrode end (201) or a negative electrode end (202) of the battery cell (20).
11. CCS assembly according to claim 8, characterized in that the main plate (31) is provided with electrode holes (33) passing through it, the free ends of the extensions (122) being connected to the cells (20) through the electrode holes (33).
12. The CCS assembly according to claim 8, wherein a first positioning hole (34) is formed in the main board (31) in a penetrating manner, a second positioning hole (42) is formed in the insulating film (4), a third positioning hole (125) is formed in the output row, and the first positioning hole (34), the second positioning hole (42) and the third positioning hole (125) are correspondingly formed.
13. CCS assembly according to any one of claims 1 to 7, characterized in that the insulating film (4) comprises a base film (401) and a glue layer (402), the glue layer (402) being arranged towards one side of the busbar group.
14. The CCS assembly according to claim 13, characterized in that said base film (401) has a thickness D1,0 μm < D1 ∈150 μm; the thickness of the adhesive layer (402) is D2, D2 is more than 0 mu m and less than or equal to 50 mu m.
15. The CCS assembly according to claim 8, characterized in that, in the extension direction of the extension (122), a side outer edge of the connecting protrusion (32) remote from the free end of the extension (122) is provided with a first rounded corner (321).
16. The CCS assembly according to claim 8, characterized in that in the extension direction of the extension (122), the top corners of the outer edges of the main plate (31) near the free ends of the extension (122) are second rounded corners (311).
17. CCS assembly according to claim 1, characterized in that at least part of the connection rows (10 c) bear on the positioning plate.
18. A battery module comprising a battery cell and a CCS assembly (1) according to any one of claims 1-17;
the battery cell (20) is connected to the busbar group through the insulating film (4) and the positioning plate.
CN202311172580.8A 2023-09-12 2023-09-12 CCS assembly and battery module Pending CN117335100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311172580.8A CN117335100A (en) 2023-09-12 2023-09-12 CCS assembly and battery module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311172580.8A CN117335100A (en) 2023-09-12 2023-09-12 CCS assembly and battery module

Publications (1)

Publication Number Publication Date
CN117335100A true CN117335100A (en) 2024-01-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311172580.8A Pending CN117335100A (en) 2023-09-12 2023-09-12 CCS assembly and battery module

Country Status (1)

Country Link
CN (1) CN117335100A (en)

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