CN118073754B - Battery can body combined connection structure and structural member manufacturing method - Google Patents
Battery can body combined connection structure and structural member manufacturing method Download PDFInfo
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- CN118073754B CN118073754B CN202410231890.0A CN202410231890A CN118073754B CN 118073754 B CN118073754 B CN 118073754B CN 202410231890 A CN202410231890 A CN 202410231890A CN 118073754 B CN118073754 B CN 118073754B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 34
- 230000008569 process Effects 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 13
- 238000000641 cold extrusion Methods 0.000 claims abstract description 8
- 238000007514 turning Methods 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 238000000137 annealing Methods 0.000 claims abstract description 4
- 238000005536 corrosion prevention Methods 0.000 claims abstract description 4
- 238000009713 electroplating Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000010791 quenching Methods 0.000 claims abstract description 4
- 230000000171 quenching effect Effects 0.000 claims abstract description 4
- 238000005496 tempering Methods 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 131
- 238000012937 correction Methods 0.000 claims description 33
- 239000011159 matrix material Substances 0.000 claims description 30
- 239000004033 plastic Substances 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000003754 machining Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 230000006870 function Effects 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
- F16B1/02—Means for securing elements of mechanisms after operation
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Forging (AREA)
Abstract
The invention relates to the technical field of machining, in particular to a battery shell combined connection structure and a manufacturing method of a structural member. The method comprises the following steps: step S101: placing the spheroidized and annealed disc element into a cold heading forming machine; step S102: processing the coil into a blank state through multi-station cold heading forming of a cold heading forming machine; step S103: annealing and softening the blank state of the coil; step S104: forming a blank-state disc element through hydraulic cold extrusion, and roughly turning an inner hole; step S105: quenching and tempering are carried out on the coils subjected to the hydraulic cold extrusion molding through heat treatment, and finish turning is carried out on the coils through a numerical control lathe according to a preset shape; step S106: and carrying out corrosion prevention treatment on the coil element through an electroplating process. The structural part can be manufactured by adopting cold forming and machining processes, so that the manufacturing cost is lower, and the energy-saving and environment-friendly effects are realized.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a battery shell combined connection structure and a manufacturing method of a structural member.
Background
The battery pack case refers to a case structure for wrapping the battery cells or the battery pack. The battery enclosure is typically made of metal, plastic or composite materials and its primary functions are to protect the internal components of the battery, to secure the battery cells or battery packs, and to provide the support and securing structures required for battery assembly and installation. The battery pack case generally has the following features and functions: 1. the battery pack shell can effectively protect battery monomers or battery packs in the battery and prevent the battery from being damaged by external environment, such as mechanical collision, extrusion, moisture invasion and the like; 2. the mechanical support, the battery pack shell provides mechanical support and fixation for the battery, ensures that the battery cannot shift or deform in the use process, and is beneficial to maintaining the structural integrity of the battery; 3. heat radiation function: some battery shell designs can also have a heat dissipation function, help the battery to dispel the heat, improve the work efficiency and the life-span of battery.
However, in the prior art, for the battery can body combination connection mode, the combination connection mode is a multi-connection mode such as a large flange nut, a double-end thread, a sleeve nut and the like, the defect of the mode is that the complexity of the assembly process is increased, more parts and procedures are needed, the production cost and the time are increased, the difficulty of maintenance and repair can be increased by using various connection modes, more tools and technologies are needed for disassembling and replacing the battery can body, the maintenance cost and the time are increased, and the improvement of the working efficiency is not facilitated, so that how to provide the battery can body combination connection structure and the structural member manufacturing method is a technical problem which are needed to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the application provides a battery can body combined connection structure and a structure manufacturing method, and the application replaces the traditional multiple connection modes of large flange nut, double-head thread, sleeve nut and the like by adopting the threaded connection of the connection sleeve and the connection nut, and the connection mode is simpler and more direct, only the threaded connection of the connection sleeve and the connection nut is needed, so that the assembly cost is reduced while the installation efficiency is improved. In order to achieve the above object, the present application provides the following technical solutions: a battery can body assembly connection structure, comprising: a cross beam; the guide rail is connected with the cross beam; the upper protecting cover of the shell is connected with the guide rail; The battery pack shell is connected with the upper protecting cover of the shell; the lower protective cover is connected with the battery shell body; the cross beam is connected with the guide rail, the upper protecting cover of the shell, the battery pack shell and the lower protecting cover through connecting sleeves and connecting nuts. In some embodiments of the present application, the upper housing cover, the battery pack housing, and the lower housing cover are rectangular, and 6 holes are formed in the upper housing cover, the battery pack housing, and the lower housing cover. In some embodiments of the application, the number of the connecting sleeve and the connecting nut is 6; the guide rail is connected with the upper protecting cover of the shell through 2 holes, 2 connecting sleeves and 2 connecting nuts, and the 2 connecting sleeves are symmetrically arranged; The cross beam is connected with the upper protecting cover of the shell, the battery pack shell and the lower protecting cover through 4 holes, 4 connecting sleeves and 4 connecting nuts. In some embodiments of the present application, the guide rail is disposed longitudinally along the upper housing cover rectangle, the cross beam is disposed transversely along the upper housing cover rectangle, and the length of the guide rail is equal to the length of the long side of the upper housing cover rectangle, and the length of the cross beam is equal to the length of the short side of the upper housing cover rectangle; the guide rail is arranged to intersect with the cross beam. In some embodiments of the application, the coupling sleeve is threaded with the coupling nut. In order to solve the technical problems, the application also correspondingly provides a method for manufacturing a structural member of a battery pack shell combined connection structure, which is applied to the battery pack shell combined connection structure, wherein the structural member is the connection sleeve, and comprises the following steps: step S101: placing the spheroidized and annealed disc element into a cold heading forming machine; Step S102: processing the disc element into a blank state through multi-station cold heading forming of the cold heading forming machine; step S103: annealing and softening the blank state of the disc element; step S104: forming the blank-state disc element through hydraulic cold extrusion, and roughly turning an inner hole; step S105: quenching and tempering the disk element subjected to hydraulic cold extrusion molding through heat treatment, and finely turning the disk element through a numerical control lathe according to a preset shape; step S106: and carrying out corrosion prevention treatment on the coil element through an electroplating process. In some embodiments of the present application, in the step S102, further includes: detecting the hardness h and the plasticity i of the disc element, and determining the reverse extrusion ratio of the cold heading forming machine when the disc element is processed into a blank state according to the hardness h and the plasticity i of the disc element; presetting a preset disc element hardness matrix T0 and a preset reverse extrusion ratio matrix A, and setting A (A1, A2, A3 and A4) for the preset reverse extrusion ratio matrix A, wherein A1 is a first preset reverse extrusion ratio, A2 is a second preset reverse extrusion ratio, A3 is a third preset reverse extrusion ratio, A4 is a fourth preset reverse extrusion ratio, and A1 is more than 15% and less than A2 and less than A3 and less than A4 and less than 50%; setting T0 (T01, T02, T03 and T04) for the preset disk hardness matrix T0, wherein T01 is the first preset disk hardness, T02 is the second preset disk hardness, T03 is the third preset disk hardness, T04 is the fourth preset disk hardness, and T01 is less than T02 and less than T03 is less than T04; Selecting a corresponding reverse extrusion ratio as the reverse extrusion ratio when the cold heading forming machine processes the disc element into a blank state according to the relation between h and the preset disc element hardness matrix T0; when h is smaller than T01, selecting the first preset reverse extrusion ratio A1 as the reverse extrusion ratio when the cold heading forming machine processes the coil into a blank state; when T01 is less than or equal to h and less than T02, selecting the second preset reverse extrusion ratio A2 as the reverse extrusion ratio when the cold heading forming machine processes the coil into a blank state; when T02 is less than or equal to h and less than T03, selecting the third preset reverse extrusion ratio A3 as the reverse extrusion ratio when the cold heading forming machine processes the coil into a blank state; When T03 is less than or equal to h and less than T04, selecting the fourth preset reverse extrusion ratio A4 as the reverse extrusion ratio when the cold heading forming machine processes the coil into a blank state. In some embodiments of the application, further comprising: presetting a preset disc element plastic matrix R0 and a preset reverse extrusion ratio correction coefficient matrix B, and setting B (B1, B2, B3 and B4) for the preset reverse extrusion ratio correction coefficient matrix B, wherein B1 is a first preset reverse extrusion ratio correction coefficient, B2 is a second preset reverse extrusion ratio correction coefficient, B3 is a third preset reverse extrusion ratio correction coefficient, B4 is a fourth preset reverse extrusion ratio correction coefficient, and B1 is more than 1 and less than B2 and B3 is more than 1.5; Setting R0 (R01, R02, R03 and R04) for the preset disc element plastic matrix R0, wherein R01 is first preset disc element plastic, R02 is second preset disc element plastic, R03 is third preset disc element plastic, R04 is fourth preset disc element plastic, and R01 is less than R02 and less than R03 is less than R04; selecting a corresponding reverse extrusion ratio correction coefficient according to the relation between i and the preset disc element plastic matrix R0 to correct each preset reverse extrusion ratio, wherein the corrected reverse extrusion ratio cannot be more than 50%; when i is less than R01, selecting the first preset reverse extrusion ratio correction coefficient B1 to correct the first preset reverse extrusion ratio A1, wherein the corrected reverse extrusion ratio is A1 x B1; When R01 is less than or equal to i and less than R02, selecting the second preset reverse extrusion ratio correction coefficient B2 to correct the second preset reverse extrusion ratio A2, wherein the corrected reverse extrusion ratio is A2 x B2; when R02 is less than or equal to i and less than R03, selecting the third preset reverse extrusion ratio correction coefficient B3 to correct the third preset reverse extrusion ratio A3, wherein the corrected reverse extrusion ratio is A3 x B3; when R03 is less than or equal to i and less than R04, the fourth preset reverse extrusion ratio correction coefficient B4 is selected to correct the fourth preset reverse extrusion ratio A4, and the corrected reverse extrusion ratio is A4 x B4. In some embodiments of the present application, the processing the disc element into a blank state in step S102 by the multi-station cold heading of the cold heading machine includes: performing first cold heading treatment on the coil element through the cold heading forming machine so as to form a first preformed rod by strong bundles at the lower part of the coil element; Performing secondary cold heading treatment on the coil by the cold heading forming machine so as to upset the upper part of the coil to form a first preformed round table; performing third cold heading treatment on the coil by the cold heading forming machine so as to reversely extrude the coil on the first preformed round table to form a first preformed hole; performing a fourth cold heading treatment on the coil by the cold heading forming machine so as to form a second preformed hole by back extrusion on the first preformed rod; carrying out fifth cold heading treatment on the wire rod through the cold heading forming machine so as to reversely extrude and stretch the first preformed hole into a third preformed hole and reversely extrude and stretch the second preformed hole into a fourth preformed hole; And carrying out a sixth cold heading treatment on the coil by the cold heading forming machine so as to form a round hole by back extrusion at the bottom of the third preformed hole, and stretching the fourth preformed hole into a fifth preformed hole by back extrusion. In some embodiments of the present application, the strength-to-beam ratio of the first cold heading process of the coil element by the cold heading forming machine is 35-41%; upsetting ratio of the coil stock during the second cold upsetting treatment by the cold upsetting forming machine is 27-33%;
and when the cold heading forming machine is used for carrying out the third cold heading treatment, the fourth cold heading treatment, the fifth cold heading treatment and the sixth cold heading treatment on the coil, the corrected reverse extrusion ratio is used as the reverse extrusion ratio during processing.
The invention provides a battery pack shell combined connection structure and a structural member manufacturing method, which have the beneficial effects that compared with the prior art:
The connecting mode effectively solves the difficulty of automatic assembly, improves the connecting strength and reliability, and only needs 2 connecting pieces, namely the connecting sleeve and the connecting nut, to replace the similar split combined structure, welding structure or multi-piece connecting structure in the market, thereby thoroughly solving the failure risk caused by failure of connection seal and complex assembly; meanwhile, the manufacturing cost of the connecting sleeve and the connecting nut is more practical, and the quality risk in the manufacturing process is lower.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is an exploded view illustrating an assembly of a battery pack case assembly connection structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of a structural member according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for manufacturing a structural member of a battery pack case assembly connection structure according to an embodiment of the present invention;
fig. 4 is a schematic process diagram of the cold heading process according to an embodiment of the present invention.
In the figure: 101. a cross beam; 102. a coupling nut; 103. a guide rail; 104. a housing upper protective cover; 105. a battery pack case; 106. a lower protective cover; 107. and (5) connecting the sleeve.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1-2, the present application provides a combined connection structure of a battery pack case 105, comprising: a cross beam 101; a rail 103, the rail 103 being connected to the cross beam 101; a housing upper cover 104, the housing upper cover 104 being connected to the guide rail 103; the battery pack housing 105, the battery pack housing 105 is connected with the housing upper protecting cover 104; a lower protection cover 106, the lower protection cover 106 being connected with the battery pack case 105; wherein, the cross beam 101 is connected with the guide rail 103, the upper protecting cover 104 of the shell, the battery pack shell 105 and the lower protecting cover 106 through the connecting sleeve 107 and the connecting nut 102. In one embodiment of the present application, the upper housing cover 104, the battery pack housing 105 and the lower housing cover 106 are rectangular, and 6 holes are formed in the upper housing cover 104, the battery pack housing 105 and the lower housing cover 106. In one embodiment of the present application, there are 6 connecting sleeves 107 and connecting nuts 102; the guide rail 103 and the upper protecting cover 104 of the shell are connected with 2 connecting sleeves 107 and 2 connecting nuts 102 through 2 holes, and the 2 connecting sleeves 107 are symmetrically arranged; the cross beam 101 is connected to the housing upper cover 104, the battery pack housing 105 and the lower cover 106 via 4 holes to 4 connecting sleeves 107 and 4 connecting nuts 102. In one embodiment of the present application, the guide rail 103 is longitudinally disposed along the rectangular shape of the upper housing cover 104, the cross beam 101 is transversely disposed along the rectangular shape of the upper housing cover 104, and the length of the guide rail 103 is equal to the length of the rectangular long side of the upper housing cover 104, and the length of the cross beam 101 is equal to the length of the rectangular short side of the upper housing cover 104; the guide rail 103 is disposed to intersect the cross member 101. In one embodiment of the present application, the coupling sleeve 107 is threadably coupled to the coupling nut 102. Referring to fig. 3-4, the present application further provides a method for manufacturing a structural member of a battery pack case assembly connection structure, which is applied to the battery pack case assembly connection structure, wherein the structural member is a connection sleeve, and includes: step S101: placing the spheroidized and annealed disc element into a cold heading forming machine; Step S102: processing the coil into a blank state through multi-station cold heading forming of a cold heading forming machine; step S103: annealing and softening the blank state of the coil; step S104: forming a blank-state disc element through hydraulic cold extrusion, and roughly turning an inner hole; step S105: quenching and tempering are carried out on the coils subjected to the hydraulic cold extrusion molding through heat treatment, and finish turning is carried out on the coils through a numerical control lathe according to a preset shape; step S106: and carrying out corrosion prevention treatment on the coil element through an electroplating process. In a specific embodiment of the present application, in step S102, further includes: detecting the hardness h and the plasticity i of the disc element, and determining the reverse extrusion ratio of the cold heading forming machine when the disc element is processed into a blank state according to the hardness h and the plasticity i of the disc element; A preset disc element hardness matrix T0 and a preset reverse extrusion ratio matrix A are preset, for the preset reverse extrusion ratio matrix A, A (A1, A2, A3 and A4) is set, wherein A1 is a first preset reverse extrusion ratio, A2 is a second preset reverse extrusion ratio, A3 is a third preset reverse extrusion ratio, A4 is a fourth preset reverse extrusion ratio, and A1 is more than 15% and less than A2 and less than A3 and less than A4 and less than 50%; setting T0 (T01, T02, T03 and T04) for a preset disk hardness matrix T0, wherein T01 is a first preset disk hardness, T02 is a second preset disk hardness, T03 is a third preset disk hardness, T04 is a fourth preset disk hardness, and T01 is more than T02 and less than T03 is less than T04; selecting a corresponding reverse extrusion ratio as the reverse extrusion ratio when the cold heading forming machine processes the disc element into a blank state according to the relation between h and a preset disc element hardness matrix T0; when h is smaller than T01, selecting a first preset reverse extrusion ratio A1 as a reverse extrusion ratio when the cold heading forming machine processes the disc element into a blank state; when T01 is less than or equal to h and less than T02, selecting a second preset reverse extrusion ratio A2 as a reverse extrusion ratio when the cold heading forming machine processes the disc element into a blank state; when T02 is less than or equal to h and less than T03, selecting a third preset reverse extrusion ratio A3 as a reverse extrusion ratio when the cold heading forming machine processes the disc element into a blank state; when T03 is less than or equal to h and less than T04, selecting a fourth preset reverse extrusion ratio A4 as the reverse extrusion ratio when the cold heading forming machine processes the disc element into a blank state. In a specific embodiment of the present application, further comprising: a preset disc element plastic matrix R0 and a preset reverse extrusion ratio correction coefficient matrix B are preset, B (B1, B2, B3 and B4) is set for the preset reverse extrusion ratio correction coefficient matrix B, wherein B1 is a first preset reverse extrusion ratio correction coefficient, B2 is a second preset reverse extrusion ratio correction coefficient, B3 is a third preset reverse extrusion ratio correction coefficient, B4 is a fourth preset reverse extrusion ratio correction coefficient, and B1 is more than 1 and less than B3 and B4 is more than 1.5; setting R0 (R01, R02, R03 and R04) for a preset disc element plastic matrix R0, wherein R01 is first preset disc element plastic, R02 is second preset disc element plastic, R03 is third preset disc element plastic, R04 is fourth preset disc element plastic, and R01 is more than R02 and less than R03 is less than R04; Selecting a corresponding reverse extrusion ratio correction coefficient according to the relation between i and a preset disc element plastic matrix R0 to correct each preset reverse extrusion ratio, wherein the corrected reverse extrusion ratio cannot be more than 50%; when i is less than R01, a first preset reverse extrusion ratio correction coefficient B1 is selected to correct the first preset reverse extrusion ratio A1, and the corrected reverse extrusion ratio is A1 x B1; when R01 is less than or equal to i and less than R02, a second preset reverse extrusion ratio correction coefficient B2 is selected to correct the second preset reverse extrusion ratio A2, and the corrected reverse extrusion ratio is A2 x B2; when R02 is less than or equal to i and less than R03, a third preset reverse extrusion ratio correction coefficient B3 is selected to correct the third preset reverse extrusion ratio A3, and the corrected reverse extrusion ratio is A3 x B3; When R03 is less than or equal to i and less than R04, a fourth preset reverse extrusion ratio correction coefficient B4 is selected to correct the fourth preset reverse extrusion ratio A4, and the corrected reverse extrusion ratio is A4 x B4. In a specific embodiment of the present application, in step S102, the processing of the disc element into a blank state by the multi-station cold heading forming of the cold heading forming machine includes: performing first cold heading treatment on the coil element through a cold heading forming machine so as to form a first preformed rod by strong bundles of the lower part of the coil element; performing secondary cold heading treatment on the disc element through a cold heading forming machine so as to upset the upper part of the disc element to form a first preformed round table; performing third cold heading treatment on the disk element through a cold heading forming machine so as to reversely extrude the disk element on a first preformed round table to form a first preformed hole; performing a fourth cold heading treatment on the disc element through a cold heading forming machine so as to reversely extrude the disc element on the first preformed rod to form a second preformed hole; carrying out fifth cold heading treatment on the disc element through a cold heading forming machine so as to stretch the first preformed hole into a third preformed hole in a back extrusion mode, and stretch the second preformed hole into a fourth preformed hole in a back extrusion mode; and carrying out a sixth cold heading treatment on the disc element through a cold heading forming machine so as to form a round hole by back extrusion at the bottom of the third preformed hole, and stretching the fourth preformed hole into a fifth preformed hole by back extrusion. In a specific embodiment of the application, the strength-to-beam ratio of the first cold heading treatment of the coil element by the cold heading forming machine is 35-41%; Upsetting ratio of the coil stock during the second cold upsetting treatment is 27-33% by the cold upsetting forming machine; and when the third cold heading treatment, the fourth cold heading treatment, the fifth cold heading treatment and the sixth cold heading treatment are carried out on the coil through the cold heading forming machine, the corrected reverse extrusion ratio is used as the reverse extrusion ratio during processing. In summary, the connection mode of the application effectively solves the difficulty of automatic assembly, improves the connection strength and reliability, and only needs 2 connecting pieces of the connecting sleeve and the connecting nut to replace the similar split combined structure, welding structure or multi-piece connection structure in the market, thereby thoroughly solving the failure risk caused by failure risk of connection seal and complex assembly; meanwhile, the manufacturing cost of the connecting sleeve and the connecting nut is more practical, and the quality risk in the manufacturing process is lower.
It will be appreciated by those skilled in the art that embodiments of the application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flowchart and/or block of the flowchart illustrations and/or block diagrams, and combinations of flowcharts and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (3)
1. The manufacturing method of the structural member of the battery pack shell combined connection structure is applied to the battery pack shell combined connection structure, and is characterized in that the battery pack shell combined connection structure comprises the following components:
A cross beam;
the guide rail is connected with the cross beam;
the upper protecting cover of the shell is connected with the guide rail;
The battery pack shell is connected with the upper protecting cover of the shell;
the lower protective cover is connected with the battery shell body;
The cross beam is connected with the guide rail, the upper protecting cover of the shell, the battery pack shell and the lower protecting cover through connecting sleeves and connecting nuts;
The upper protecting cover of the shell, the battery pack shell and the lower protecting cover are rectangular, and 6 holes are formed in the upper protecting cover of the shell, the battery pack shell and the lower protecting cover;
the number of the connecting sleeves and the number of the connecting nuts are 6;
The guide rail is connected with the upper protecting cover of the shell through 2 holes, 2 connecting sleeves and 2 connecting nuts, and the 2 connecting sleeves are symmetrically arranged;
The cross beam is connected with the upper protecting cover of the shell, the battery pack shell and the lower protecting cover through 4 holes, 4 connecting sleeves and 4 connecting nuts;
The guide rail is longitudinally arranged along the upper protecting cover rectangle of the shell, the cross beam is transversely arranged along the upper protecting cover rectangle of the shell, the length of the guide rail is equal to the length of the long side of the upper protecting cover rectangle of the shell, and the length of the cross beam is equal to the length of the short side of the upper protecting cover rectangle of the shell;
the guide rail and the cross beam are arranged in a crossing way;
The connecting sleeve is in threaded connection with the connecting nut;
the structural member is the connecting sleeve, and the manufacturing method of the structural member of the battery pack shell combined connecting structure comprises the following steps:
step S101: placing the spheroidized and annealed disc element into a cold heading forming machine;
Step S102: processing the disc element into a blank state through multi-station cold heading forming of the cold heading forming machine;
Step S103: annealing and softening the blank state of the disc element;
step S104: forming the blank-state disc element through hydraulic cold extrusion, and roughly turning an inner hole;
step S105: quenching and tempering the disk element subjected to hydraulic cold extrusion molding through heat treatment, and finely turning the disk element through a numerical control lathe according to a preset shape;
step S106: performing corrosion prevention treatment on the disc element through an electroplating process;
in the step S102, further includes:
detecting the hardness h and the plasticity i of the disc element, and determining the reverse extrusion ratio of the cold heading forming machine when the disc element is processed into a blank state according to the hardness h and the plasticity i of the disc element;
Presetting a preset disc element hardness matrix T0 and a preset reverse extrusion ratio matrix A, and setting A (A1, A2, A3 and A4) for the preset reverse extrusion ratio matrix A, wherein A1 is a first preset reverse extrusion ratio, A2 is a second preset reverse extrusion ratio, A3 is a third preset reverse extrusion ratio, A4 is a fourth preset reverse extrusion ratio, and A1 is more than 15% and less than A2 and less than A3 and less than A4 and less than 50%;
setting T0 (T01, T02, T03 and T04) for the preset disk hardness matrix T0, wherein T01 is the first preset disk hardness, T02 is the second preset disk hardness, T03 is the third preset disk hardness, T04 is the fourth preset disk hardness, and T01 is less than T02 and less than T03 is less than T04;
Selecting a corresponding reverse extrusion ratio as the reverse extrusion ratio when the cold heading forming machine processes the disc element into a blank state according to the relation between h and the preset disc element hardness matrix T0;
When h is smaller than T01, selecting the first preset reverse extrusion ratio A1 as the reverse extrusion ratio when the cold heading forming machine processes the coil into a blank state;
When T01 is less than or equal to h and less than T02, selecting the second preset reverse extrusion ratio A2 as the reverse extrusion ratio when the cold heading forming machine processes the coil into a blank state;
When T02 is less than or equal to h and less than T03, selecting the third preset reverse extrusion ratio A3 as the reverse extrusion ratio when the cold heading forming machine processes the coil into a blank state;
when T03 is less than or equal to h and less than T04, selecting the fourth preset reverse extrusion ratio A4 as the reverse extrusion ratio when the cold heading forming machine processes the coil into a blank state;
Further comprises:
Presetting a preset disc element plastic matrix R0 and a preset reverse extrusion ratio correction coefficient matrix B, and setting B (B1, B2, B3 and B4) for the preset reverse extrusion ratio correction coefficient matrix B, wherein B1 is a first preset reverse extrusion ratio correction coefficient, B2 is a second preset reverse extrusion ratio correction coefficient, B3 is a third preset reverse extrusion ratio correction coefficient, B4 is a fourth preset reverse extrusion ratio correction coefficient, and B1 is more than 1 and less than B2 and B3 is more than 1.5;
Setting R0 (R01, R02, R03 and R04) for the preset disc element plastic matrix R0, wherein R01 is first preset disc element plastic, R02 is second preset disc element plastic, R03 is third preset disc element plastic, R04 is fourth preset disc element plastic, and R01 is less than R02 and less than R03 is less than R04;
Selecting a corresponding reverse extrusion ratio correction coefficient according to the relation between i and the preset disc element plastic matrix R0 to correct each preset reverse extrusion ratio, wherein the corrected reverse extrusion ratio cannot be more than 50%;
when i is less than R01, selecting the first preset reverse extrusion ratio correction coefficient B1 to correct the first preset reverse extrusion ratio A1, wherein the corrected reverse extrusion ratio is A1 x B1;
When R01 is less than or equal to i and less than R02, selecting the second preset reverse extrusion ratio correction coefficient B2 to correct the second preset reverse extrusion ratio A2, wherein the corrected reverse extrusion ratio is A2 x B2;
when R02 is less than or equal to i and less than R03, selecting the third preset reverse extrusion ratio correction coefficient B3 to correct the third preset reverse extrusion ratio A3, wherein the corrected reverse extrusion ratio is A3 x B3;
when R03 is less than or equal to i and less than R04, the fourth preset reverse extrusion ratio correction coefficient B4 is selected to correct the fourth preset reverse extrusion ratio A4, and the corrected reverse extrusion ratio is A4 x B4.
2. The method for manufacturing a structural member of a battery can body assembly connection structure according to claim 1, wherein in the step S102, the coil is processed into a blank state by multi-station cold heading molding of the cold heading molding machine, comprising:
Performing first cold heading treatment on the coil element through the cold heading forming machine so as to form a first preformed rod by strong bundles at the lower part of the coil element; performing secondary cold heading treatment on the coil by the cold heading forming machine so as to upset the upper part of the coil to form a first preformed round table; performing third cold heading treatment on the coil by the cold heading forming machine so as to reversely extrude the coil on the first preformed round table to form a first preformed hole; performing a fourth cold heading treatment on the coil by the cold heading forming machine so as to form a second preformed hole by back extrusion on the first preformed rod; carrying out fifth cold heading treatment on the wire rod through the cold heading forming machine so as to reversely extrude and stretch the first preformed hole into a third preformed hole and reversely extrude and stretch the second preformed hole into a fourth preformed hole; and carrying out a sixth cold heading treatment on the coil by the cold heading forming machine so as to form a round hole by back extrusion at the bottom of the third preformed hole, and stretching the fourth preformed hole into a fifth preformed hole by back extrusion.
3. The method for manufacturing the structural member of the assembled and connected structure of the battery can body according to claim 2, wherein,
The strong beam ratio of the coil stock is 35-41% when the cold heading forming machine carries out the first cold heading treatment;
Upsetting ratio of the coil stock during the second cold upsetting treatment by the cold upsetting forming machine is 27-33%;
and when the cold heading forming machine is used for carrying out the third cold heading treatment, the fourth cold heading treatment, the fifth cold heading treatment and the sixth cold heading treatment on the coil, the corrected reverse extrusion ratio is used as the reverse extrusion ratio during processing.
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US6053680A (en) * | 1998-02-16 | 2000-04-25 | Menke; Manfred | Sleeve nut |
CN116826286A (en) * | 2022-03-22 | 2023-09-29 | 标致雪铁龙汽车股份有限公司 | Power battery pack and vehicle |
CN117102807A (en) * | 2023-07-13 | 2023-11-24 | 敏实汽车技术研发有限公司 | Manufacturing method of mounting sleeve and mounting sleeve |
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CN100586636C (en) * | 2008-06-05 | 2010-02-03 | 中国船舶重工集团公司第十二研究所 | Special-shaped curved surface stator precise compound plasticity shaping process |
CN102500732B (en) * | 2011-10-17 | 2013-11-06 | 浙江裕泰汽车配件有限公司 | Multi-station cold heading forming technology of automobile door limiter |
DE102013017153A1 (en) * | 2013-10-16 | 2014-07-24 | Daimler Ag | Threaded element, particularly bush for thread-forming screw for automotive vehicle, particularly passenger car, has non-threaded supporting unit limited by inner peripheral side skin surface for partially supporting thread-forming screw |
CN107398685B (en) * | 2017-07-26 | 2019-04-12 | 施少华 | The processing method of step hollow shaft sleeve |
CN111203695A (en) * | 2020-03-23 | 2020-05-29 | 鹏驰五金制品(昆山)有限公司 | Cup head screw production process method |
CN117020100A (en) * | 2023-08-09 | 2023-11-10 | 宾科汽车紧固件(昆山)有限公司 | Forming process and forming device of inner clamp nut and inner clamp nut |
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Patent Citations (3)
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US6053680A (en) * | 1998-02-16 | 2000-04-25 | Menke; Manfred | Sleeve nut |
CN116826286A (en) * | 2022-03-22 | 2023-09-29 | 标致雪铁龙汽车股份有限公司 | Power battery pack and vehicle |
CN117102807A (en) * | 2023-07-13 | 2023-11-24 | 敏实汽车技术研发有限公司 | Manufacturing method of mounting sleeve and mounting sleeve |
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