WO2024008369A1 - An equipment and method to process tabs of pouch cells during assembly of battery packs - Google Patents

An equipment and method to process tabs of pouch cells during assembly of battery packs Download PDF

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Publication number
WO2024008369A1
WO2024008369A1 PCT/EP2023/064954 EP2023064954W WO2024008369A1 WO 2024008369 A1 WO2024008369 A1 WO 2024008369A1 EP 2023064954 W EP2023064954 W EP 2023064954W WO 2024008369 A1 WO2024008369 A1 WO 2024008369A1
Authority
WO
WIPO (PCT)
Prior art keywords
tabs
fixture
pouch cells
equipment
plate
Prior art date
Application number
PCT/EP2023/064954
Other languages
French (fr)
Inventor
Gopal Krishna Setharamaiah
Original Assignee
Robert Bosch Gmbh
Bosch Limited
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 Robert Bosch Gmbh, Bosch Limited filed Critical Robert Bosch Gmbh
Publication of WO2024008369A1 publication Critical patent/WO2024008369A1/en

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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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B23K37/0435—Clamps
    • B23K37/0443—Jigs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • 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
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • 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

Definitions

  • the present invention relates to an equipment and method to process tabs of pouch cells during assembly of battery packs.
  • a patent literature US20200368855 discloses pressurization jig for pressurizing busbar and battery module manufacturing system comprising same.
  • a pressing jig for welding an electrode lead located in a lead slit formed at the bus bar to the bus bar in a closely adhered state.
  • the pressing jig includes a first frame having a first distance adjusting unit and a first pressing unit, and a second frame having a second distance adjusting unit facing the first distance adjusting unit and a second pressing unit facing the first pressing unit.
  • the first frame and the second frame are coupled so that a distance between first pressing unit and the second pressing unit is increased when a distance between the first distance adjusting unit and the second distance adjusting unit is decreased, and the distance between first pressing unit and the second pressing unit is decreased when the distance between the first distance adjusting unit and the second distance adjusting unit is increased.
  • FIG. 1 illustrates different views of a battery pack, according to an embodiment of the present invention
  • Fig. 2 illustrates an apparatus/equipment to process tabs of pouch cells during assembly of the battery packs, according to an embodiment of the present invention
  • FIG. 3 illustrates positioning of the battery pack in the equipment, according to an embodiment of the present invention
  • FIG. 4 illustrates a first fixture comprising a bending mechanism, according to an embodiment of the present invention
  • Fig. 5 illustrates a second fixture comprising a pressing mechanism in a first state, according to an embodiment of the present invention
  • FIG. 6 illustrates the second fixture with pressing mechanism in a second state, according to an embodiment of the present invention
  • Fig. 7 illustrates a top view of the second fixture, according to an embodiment of the present invention.
  • Fig. 8 illustrates a method for processing tabs of pouch cells during assembly of a battery pack, according to the present invention.
  • Fig. 1 illustrates different views of a battery pack, according to an embodiment of the present invention.
  • the battery pack 100 comprises a housing 102 which encloses plurality of pouch cells 112, where each pouch cell 112 comprises a positive tab 104 and a negative tab 106.
  • a size of the positive tab 104 is bigger than a size of the negative tab 106.
  • the size of the negative tab 106 is bigger than the size of the positive tab 104.
  • the plurality of pouch cells 112 are held inside the housing 102 through a holder member 114.
  • the holder member 114 is fastened to the internally to the housing 102 for stability.
  • the positive tab 104 and the negative tab 106 passes through the slits of the holder member 114.
  • the cover or lid of the battery pack 100 is not shown to clearly depict the tabs 104, 106 and for ease of explanation.
  • a cut-section view 110 of the battery pack 100 is shown where the plurality of stacked pouch cells 112 is assembled by the holder member 114 with tabs 104, 106 extending out through the slits.
  • Fig. 2 illustrates an apparatus/equipment to process tabs of pouch cells during assembly of the battery packs, according to an embodiment of the present invention.
  • the battery pack 100 having the housing 102 with stacked pouch cells 112, and tabs 104, 106 of the pouch cells 112 passes through and held by the holder member 114 within the housing 102.
  • the equipment 200 comprises a frame enclosure 210 with a base 204 and side walls to accommodate the battery pack 100 during assembly, characterized in that, a plate 202 positioned on a free end 220 of the frame enclosure 210 in removable manner.
  • the plate 202 is positioned opposite to the base 204.
  • the plate 202 is also provided with handle 214 for manual removal or placement or lifting of the frame enclosure 210 once fixed.
  • the plate 202 is further fastened rigidly to the frame enclosure 210 to ensure proper load is applied onto the tabs 104, 106 which is confirmed with the help of integrated load sensors (not shown).
  • the base 204 of the frame enclosure 210 comprises guide rails 208 based movable platform 206 to enable movement of the housing 102 with stacked pouch cells 112 in and out of the frame enclosure 210.
  • a stop 218 is provided opposite to the entry point to aid in positioning of the battery pack 100.
  • a set of alignment pins 222 are provided on the plate 202 which helps align the plate 202 to the housing 102 positioned on the platform 206.
  • the plate 202 rests on spacers 212 which is explained later.
  • spacers 212 is equally usable and covered by the present invention.
  • FIG. 3 illustrates positioning of the battery pack in the equipment, according to an embodiment of the present invention.
  • the housing 102 with stacked pouch cells 112 is shown placed on the sliding platform 206.
  • the platform 206 is pulled/pushed in either manually or automatically, over the guide rails 208.
  • the sliding platform 206 which is distance controlled, slides the housing 102 with stacked pouch cells 112 below the plate 202 which is held at a height caused by spacers 212.
  • the distance controlled corresponds to gradual or stepwise movement.
  • the plate 202 is positioned on the free end 220 and rested on spacers 212.
  • a third view 306 the spacers 212 are removed (either manually or by automation), thus allowing the plate 202 with fixture 216 to engage with the tabs 104, 106.
  • the plate 202 with spring 404 loaded rollers 408 is lowered onto the tabs 104, 106 and the plate 202 is moved to bend the tabs 104, 106 with the help of spring-loaded rollers 408.
  • the spacers 212 can be in any shape such as sleeve but with a one-fourth cut-out groove along the axial direction for easy placement. With respect to the frame enclosure 210, four number of spacers 212 are provided/removed but not limited to the same. Now the battery pack 100 is ready for the processing of the tabs 104, 106.
  • a fourth view 308 is shown for ease of understanding, where the platform 206 has moved under the plate 202 and shown from the top.
  • Fig. 4 illustrates a first fixture comprising a bending mechanism, according to an embodiment of the present invention.
  • the plate 202 is provided comprising the fixture 216 with respective mechanism to process the tabs 104, 106.
  • the fixture 216 is selectable from any one of a first fixture 402 and a second fixture 502 (shown in Fig. 5).
  • the first fixture 402 comprises a bending mechanism to bend tabs 104, 106 of the pouch cells 112.
  • the second fixture 502 comprises a pressing mechanism to press and hold tabs 104, 106 of the plurality of pouch cells 112 in pressed state for welding.
  • an apparatus/equipment 200 to process tabs 104, 106 of the pouch cells 112 during assembly of the battery packs 100 is provided.
  • the battery pack 100 having the housing 102 with stacked pouch cells 112, and tabs 104, 106 of the pouch cells 112 passes through and held by the holder member 114 within the housing 102.
  • the equipment 200 comprises the frame enclosure 210 with the base 204 and side walls to accommodate the battery pack 100 during assembly, characterized in that, the plate 202 positioned on the free end 220 of the frame enclosure 210 in removable manner.
  • the plate 202 is positioned opposite to the base 204.
  • the plate 202 is provided with the first fixture 402 comprising the bending mechanism.
  • the bending mechanism comprises the first fixture 402 fit with plurality of spring 404 loaded projecting body 406 with roller heads 408.
  • the spring motion is actuated when the plate 202 travels vertically towards the platform 206.
  • the plate 202 engages with tabs 104, 106 of the pouch cells 112 through the roller heads 408 and bends the tabs 104, 106 of the pouch cells 112 on movement in a bending direction.
  • the first fixture 402 comprises multiple spring 404 loaded projecting body 406 which are designed to be positioned adjacent to negative tabs 106 of the pouch cells 112 and then moved in a direction to bend the same.
  • the first fixture 402 is positioned adjacent to the positive tabs 104 and then moved opposite to the first direction to bend the same over the negative tab 106.
  • the tabs 104, 106 are either bent individually or multiple tabs 104, 106 together.
  • the negative tab 106 are designed to be bigger in dimension than the positive tab 104, however vice-versa is also possible.
  • the above structure and mechanism is shown in two views, where in the first side-view 400, the first fixture 402 is positioned before bending the tabs 104, 106. In a second side view 410, the first fixture 402 is in a position after bending the tabs 104, 106.
  • the folded/bent tabs 104, 106 over the contact land 108 is represented by numeral 414.
  • the series 412 shows the multiple bent tabs 104, 106.
  • the projecting body 406 are fixed using bolts and nuts/fasteners as known in the art.
  • a load sensor is also used to ensure the load on the tabs 104, 106 does not exceed a threshold limit, which if breached may causes damage.
  • the first fixture 402 bends the positive tabs 104 and the negative tabs 106 before welding as shown in Fig. 5.
  • the roller heads 408 is attached to the projecting body 406 (or taper body) which bends the tabs 104, 106 of the pouch cells 112 before the roller head 408 applies load to ensure a permanent bend.
  • the first fixture 402 provides load on tabs 104, 106 of each pouch cell 112 which maintains zero gap therebetween during welding.
  • FIG. 5 illustrates a second fixture comprising a pressing mechanism in a first state, according to an embodiment of the present invention.
  • a first full-side view 500 is shown with two rows of second fixtures 502 positioned on the plate 202.
  • a first detailed view of one of the second fixture 502 is shown below the first fullside view 500.
  • the second fixture 502 comprises the pressing mechanism which is explained in detail.
  • the pressing mechanism comprises a pair of cylindrical bars 506 with coaxial springs 518 held between a support beam 504 and a press beam 508.
  • a head 508 of the cylindrical bar 506 is secured to the press beam 508, and a tail end 520 of the cylindrical bar 506 is threaded and fastened on other side of the support beam 504 through a tightening member 522.
  • the press beam 508 is designed to engage with tabs 104, 106 of the pouch cell 112 through a contact member 510.
  • the support beam 504 and the press beam 508 comprises respective third cut-out/slot 524 and a first cut-out/slot 512 and second cut-out 514 to expose pressed tabs 104, 106 for welding.
  • slots of 10mm wide (or other dimensions) are provided for the laser focus while also maintaining pressure onto the contact land 108 on a Printed Circuit Board (PCB) 116.
  • PCB Printed Circuit Board
  • the tabs 104, 106 for positive terminal and negative terminal are of unequal width and of different/same material.
  • spacers 212 are used for the mounting of the plate 202 such that the second fixture 502 is easily positioned over the tabs 104, 106 for processing or the housing 102 with stacked pouch cells 112 is easily positioned beneath the second fixture 502.
  • the load sensor is also used to ensure the load on the tabs 104, 106 does not exceed a threshold limit, which if breached may causes damage to the tabs 104, 106.
  • the press member 508 is adjoined with the contact member 510 to engage with the bent tabs 104, 106.
  • the contact member 510 is non-conductor of electricity to avoid any electrical faults due to metallic nature of press member 508 and the bent tabs 104, 106.
  • the contact member 510 is made of material such as plastic or resin or rubber and not limited to the same.
  • an apparatus/equipment 200 to process tabs 104, 106 of the pouch cells 112 during assembly of the battery packs 100 is provided.
  • the battery pack 100 having the housing 102 with stacked pouch cells 112, and tabs 104, 106 of the pouch cells 112 passes through and held by the holder member 114 within the housing 102.
  • the equipment 200 comprises the frame enclosure 210 with the base 204 and side walls to accommodate the battery pack 100 during assembly, characterized in that, the plate 202 positioned on the free end 220 of the frame enclosure 210 in removable manner.
  • the plate 202 is positioned opposite to the base 204.
  • the plate 202 is provided with the second fixture 502 comprising the pressing mechanism.
  • the plate 202 is lowered once asset of alignment pins 222 are aligned with housing 102 during which the plate 202 compresses the coaxial spring 518.
  • the plate 202 is fastened at four locations to fix the plate 202 in position and to resist the reaction force from the coaxial spring 518.
  • the compression in the coaxial spring 518 therefore applies load onto the tabs 104, 106 of the pouch cells 112 which helps to maintain zero air gap between the positive tabs 104 and negative tabs 106 during welding.
  • the load applied onto the individual positive tabs 104 and the negative tabs 106 is confirmed by the integrated load sensors.
  • Fig. 6 illustrates the second fixture with pressing mechanism in a second state, according to an embodiment of the present invention.
  • the construction of the second fixture 502 remains same as explained in Fig. 5. However, the operating state has changed to second state as shown in second full-side view 600, where the pressing force is applied to the bent tabs 104, 106 of the pouch cells 112.
  • the spacers 212 as shown in Fig. 5 is removed which makes the second fixture 502 rest directly on the tabs 104, 106.
  • the tightening members 522 on the support beam 504 are rotated all at once to uniformly distribute pressing force on the bent tabs 104, 106.
  • a laser welding or other suitable welding is used to weld the tabs 104, 106 and the contact land 108 through the slots 512, 514 and 524.
  • Fig. 7 illustrates a top view of the second fixture, according to an embodiment of the present invention.
  • the second fixture 502 every pair of tabs 104, 106 which are bent over each other is provided with the second fixture 502.
  • the first cut-out 512 provides opening for welding the smaller tab with the bigger tab.
  • the second cut-out 514 provides opening for welding the bigger tab with the contact land 108 (contact strip) on the PCB 116.
  • the tightening member 522 is provided on both ends of the support member 504.
  • the coaxial spring 518 is in compressed start till the welding is complete.
  • the positive tab 104 is made of aluminum material
  • the negative tab 106 is made of copper material
  • the contact land 108 on the PCB 116 mounted on the holder member 114 is made of copper material.
  • the positive tab 104 is smaller in dimension than the negative tab 106. The dimension and the material are explained as an example and must not be understood in limiting manner. The welding is done at two places, i.e. contact land 108 and the negative tab 106 through the first cut-out 512, and then positive tab 104 and the negative tab 106 through the second cut-out 514.
  • the changeover between the first fixture 402 and the second fixture 502 with corresponding bending mechanism and pressing mechanism, and movement of the movable platform 206, and placement and removal of spacers 212 is at least one of a manual means, automated means, and semi-automatic means.
  • the manual means comprises the operator handling the complete assembly process with tools.
  • the automatic means comprises the use of automation known in the art such as hydraulics, pneumatics, etc. for the assembly of the battery pack 100.
  • the semi-automatic means comprises the use of part operator and part automation.
  • An Electronic Control Unit (ECU) is made use of for the operation through automatic and semi-automatic means which makes of many sensors such as load sensor.
  • the fixture 216 is either permanently provided on the plate 202, or the plate 202 is provided with fixing of the first fixture 402 and the second fixture 502.
  • One plate 202 each with first fixture 402 and the second fixture 502 or a common plate 202 for both the first fixture 402 and the second fixture 502, but usable one after the other.
  • the first fixture 402 and second fixture 502 are removably fixable to the plate 202.
  • Fig. 8 illustrates a method for processing tabs of pouch cells during assembly of a battery pack, according to the present invention.
  • the pouch cells 112 are stacked inside the housing 102 and tabs 104, 106 of the pouch cells 112 passes through and held by the holder member 114 within the housing 102.
  • the method is characterized by plurality of steps, of which a step 802 comprises placing the housing 102 with the stacked pouch cells 112 inside the frame enclosure 210 for assembly.
  • a step 804 comprises positioning the plate 202 with any one of the first fixture 402 and the second fixture 502 over the frame enclosure 210.
  • a step 806 comprises processing tabs 104, 106 of the plurality of pouch cells 112 according to selected fixture 216.
  • the first fixture 402 comprises plurality of projecting body 406 with roller heads 408 extending from the plate 202.
  • the method comprises plurality of steps, of which a step 808 comprises moving the plurality of projecting body 406 with the roller heads 408 in a first direction transverse to a first set of plurality of tabs 104, 106 and bending the first set of plurality of tabs 104, 106.
  • a step 810 comprises moving the plurality of projecting body 406 with the roller head 408 in a second direction opposite to the first direction and bending the second set of plurality of tabs 104, 106 over the first set of tabs 104, 106 which are already bent.
  • the first set of plurality of tabs 104, 106 corresponds to those which are to be bent in the same direction at once. Consequently, the second set of plurality of tabs 104, 106 are those which are bent over the already bent tabs 104, 106 from the first set of plurality of tabs 104, 106. It is to be noted, that individual or group bending of tabs 104, 106 is possible.
  • the second fixture 502 comprises the pair of cylindrical bars 506 with the coaxial springs 518 held between the support beam 504 and the press beam 508.
  • the head 516 of the cylindrical bar 506 is secured to the press beam 508, and the tail end 520 of the cylindrical bar 506 is threaded and fastened on other side of the support beam 504 through the tightening members 522.
  • the method comprises plurality of steps of which a step 812 comprises tightening the tightening members 522 and pressing the press beam 508 on bent tabs 104, 106 of plurality of the pouch cells 112 and maintaining pressure on the bent tabs 104, 106 at the predetermined pressure.
  • a step 814 comprises welding the bent tabs 104, 106 through cut-outs 512, 514, 524 made in the pressing mechanism.
  • the method with bending mechanism and pressing mechanism are independently implementable using the frame enclosure 210. Further, the equipment 200 and the method are usable in assembly line by either using the manual efforts or automatic or semi-automatic.
  • the battery pack 100 is usable in any static or movable machines such as Uninterrupted Power Supply (UPS), inverters, and as traction battery and auxiliary battery in vehicles such as a two-wheeler such as scooter, motorcycle, a three-wheeler such as autorickshaw, a four wheeler such as cars, multi-wheel vehicles, off-road vehicles and water sports vehicles, snow-mobiles, etc.
  • UPS Uninterrupted Power Supply
  • inverters inverters
  • traction battery and auxiliary battery in vehicles such as a two-wheeler such as scooter, motorcycle, a three-wheeler such as autorickshaw, a four wheeler such as cars, multi-wheel vehicles, off-road vehicles and water sports vehicles, snow-mobiles, etc.
  • an apparatus/equipment 200 to bend and weld the tabs 104, 106 of pouch cells 112 with the aid of mechanical spring and load sensor thereon is provided.
  • the present invention describes new development/ technology for bending and welding the tabs 104, 106 of the pouch cells 112.
  • the positive tabs 104 and the negative tabs 106 of the pouch cells 112 are bended using the novel mechanism.
  • the pressing mechanism makes use of load sensor to detect load acting on the tabs 104, 106 due to the spring compression. The pressing mechanism ensures force required to maintain zero air gap between the positive tabs 104 and negative tabs 106 of the pouch cells 112 during welding.
  • the movable platform 206 aids in positioning and alignment of the battery pack 100 on the base 204 of the equipment 200.
  • the material for the tabs 104, 106 are chosen to withstand the subjected temperatures during welding.
  • the housing 102 also comprises venting ports for gases to escape during welding.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The present invention provides an equipment (200) to process tabs (104, 106) of the pouch cells (112) during assembly of the battery packs (100). The battery pack (100) having the housing (102) with stacked pouch cells (112), and tabs (104, 106) of the pouch cells (112) passes through and held by the holder member (114) within the housing (102). The equipment (200) comprises a frame enclosure (210) with a base (204) and side walls to accommodate the battery pack (100) during assembly, characterized in that, a plate (202) positioned on a free end of the frame enclosure (210), which is opposite to the base (204), in removable manner. The plate (202) is provided with the fixture (216) with respective mechanism to process the tabs (104, 106). The fixture (216) is selectable from any one of a first fixture (402) and a second fixture (502).

Description

FORM 2
THE PATENTS ACT, 1970 (39 of 1970) & The Patents Rules 2003
COMPLETE SPECIFICATION
(SECTION 10 and Rule 13)
1. Title of the Invention:
AN EQUIPMENT AND METHOD TO PROCESS TABS OF POUCH
CELLS DURING ASSEMBLY OF BATTERY PACKS
2. Applicants: a. Name: Bosch Limited
Nationality: INDIA
Address: Post Box No 3000, Hosur Road, Adugodi, Bangalore
- 560030, Karnataka, India b. Name: Robert Bosch GmbH
Nationality: GERMANY
Address: Stuttgart, Feuerbach, Germany
Complete Specification:
The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed: Field of the invention:
[0001] The present invention relates to an equipment and method to process tabs of pouch cells during assembly of battery packs.
Background of the invention:
[0002] A patent literature US20200368855 discloses pressurization jig for pressurizing busbar and battery module manufacturing system comprising same. Disclosed is a pressing jig for welding an electrode lead located in a lead slit formed at the bus bar to the bus bar in a closely adhered state. The pressing jig includes a first frame having a first distance adjusting unit and a first pressing unit, and a second frame having a second distance adjusting unit facing the first distance adjusting unit and a second pressing unit facing the first pressing unit. The first frame and the second frame are coupled so that a distance between first pressing unit and the second pressing unit is increased when a distance between the first distance adjusting unit and the second distance adjusting unit is decreased, and the distance between first pressing unit and the second pressing unit is decreased when the distance between the first distance adjusting unit and the second distance adjusting unit is increased.
Brief description of the accompanying drawings:
[0003] An embodiment of the disclosure is described with reference to the following accompanying drawing,
[0004] Fig. 1 illustrates different views of a battery pack, according to an embodiment of the present invention;
[0005] Fig. 2 illustrates an apparatus/equipment to process tabs of pouch cells during assembly of the battery packs, according to an embodiment of the present invention;
[0006] Fig. 3 illustrates positioning of the battery pack in the equipment, according to an embodiment of the present invention;
[0007] Fig. 4 illustrates a first fixture comprising a bending mechanism, according to an embodiment of the present invention; [0008] Fig. 5 illustrates a second fixture comprising a pressing mechanism in a first state, according to an embodiment of the present invention;
[0009] Fig. 6 illustrates the second fixture with pressing mechanism in a second state, according to an embodiment of the present invention;
[0010] Fig. 7 illustrates a top view of the second fixture, according to an embodiment of the present invention, and
[0011] Fig. 8 illustrates a method for processing tabs of pouch cells during assembly of a battery pack, according to the present invention.
Detailed description of the embodiments:
[0012] Fig. 1 illustrates different views of a battery pack, according to an embodiment of the present invention. The battery pack 100 comprises a housing 102 which encloses plurality of pouch cells 112, where each pouch cell 112 comprises a positive tab 104 and a negative tab 106. In one case, a size of the positive tab 104 is bigger than a size of the negative tab 106. Alternatively in other case, the size of the negative tab 106 is bigger than the size of the positive tab 104. The plurality of pouch cells 112 are held inside the housing 102 through a holder member 114. The holder member 114 is fastened to the internally to the housing 102 for stability. The positive tab 104 and the negative tab 106 passes through the slits of the holder member 114. The cover or lid of the battery pack 100 is not shown to clearly depict the tabs 104, 106 and for ease of explanation.
[0013] A cut-section view 110 of the battery pack 100 is shown where the plurality of stacked pouch cells 112 is assembled by the holder member 114 with tabs 104, 106 extending out through the slits.
[0014] Fig. 2 illustrates an apparatus/equipment to process tabs of pouch cells during assembly of the battery packs, according to an embodiment of the present invention. The battery pack 100 having the housing 102 with stacked pouch cells 112, and tabs 104, 106 of the pouch cells 112 passes through and held by the holder member 114 within the housing 102. The equipment 200 comprises a frame enclosure 210 with a base 204 and side walls to accommodate the battery pack 100 during assembly, characterized in that, a plate 202 positioned on a free end 220 of the frame enclosure 210 in removable manner. The plate 202 is positioned opposite to the base 204. The plate 202 is also provided with handle 214 for manual removal or placement or lifting of the frame enclosure 210 once fixed. The plate 202 is further fastened rigidly to the frame enclosure 210 to ensure proper load is applied onto the tabs 104, 106 which is confirmed with the help of integrated load sensors (not shown).
[0015] According to an embodiment of the present invention, the base 204 of the frame enclosure 210 comprises guide rails 208 based movable platform 206 to enable movement of the housing 102 with stacked pouch cells 112 in and out of the frame enclosure 210. A stop 218 is provided opposite to the entry point to aid in positioning of the battery pack 100. Further, a set of alignment pins 222 are provided on the plate 202 which helps align the plate 202 to the housing 102 positioned on the platform 206. The plate 202 rests on spacers 212 which is explained later. However, an equivalent mechanism instead of spacer 212 is equally usable and covered by the present invention.
[0016] Fig. 3 illustrates positioning of the battery pack in the equipment, according to an embodiment of the present invention. In a first view 302, the housing 102 with stacked pouch cells 112 is shown placed on the sliding platform 206. In a second view 304, the platform 206 is pulled/pushed in either manually or automatically, over the guide rails 208. The sliding platform 206 which is distance controlled, slides the housing 102 with stacked pouch cells 112 below the plate 202 which is held at a height caused by spacers 212. The distance controlled corresponds to gradual or stepwise movement. In the first two views, the plate 202 is positioned on the free end 220 and rested on spacers 212. However, in a third view 306, the spacers 212 are removed (either manually or by automation), thus allowing the plate 202 with fixture 216 to engage with the tabs 104, 106. In other words, the plate 202 with spring 404 loaded rollers 408 is lowered onto the tabs 104, 106 and the plate 202 is moved to bend the tabs 104, 106 with the help of spring-loaded rollers 408. The spacers 212 can be in any shape such as sleeve but with a one-fourth cut-out groove along the axial direction for easy placement. With respect to the frame enclosure 210, four number of spacers 212 are provided/removed but not limited to the same. Now the battery pack 100 is ready for the processing of the tabs 104, 106. A fourth view 308 is shown for ease of understanding, where the platform 206 has moved under the plate 202 and shown from the top.
[0017] Fig. 4 illustrates a first fixture comprising a bending mechanism, according to an embodiment of the present invention. The plate 202 is provided comprising the fixture 216 with respective mechanism to process the tabs 104, 106. In accordance to an embodiment, the fixture 216 is selectable from any one of a first fixture 402 and a second fixture 502 (shown in Fig. 5). The first fixture 402 comprises a bending mechanism to bend tabs 104, 106 of the pouch cells 112. The second fixture 502 comprises a pressing mechanism to press and hold tabs 104, 106 of the plurality of pouch cells 112 in pressed state for welding.
[0018] According to an embodiment of the present invention, an apparatus/equipment 200 to process tabs 104, 106 of the pouch cells 112 during assembly of the battery packs 100 is provided. The battery pack 100 having the housing 102 with stacked pouch cells 112, and tabs 104, 106 of the pouch cells 112 passes through and held by the holder member 114 within the housing 102. The equipment 200 comprises the frame enclosure 210 with the base 204 and side walls to accommodate the battery pack 100 during assembly, characterized in that, the plate 202 positioned on the free end 220 of the frame enclosure 210 in removable manner. The plate 202 is positioned opposite to the base 204. The plate 202 is provided with the first fixture 402 comprising the bending mechanism.
[0019] The bending mechanism comprises the first fixture 402 fit with plurality of spring 404 loaded projecting body 406 with roller heads 408. The spring motion is actuated when the plate 202 travels vertically towards the platform 206. The plate 202 engages with tabs 104, 106 of the pouch cells 112 through the roller heads 408 and bends the tabs 104, 106 of the pouch cells 112 on movement in a bending direction. In specific, the first fixture 402 comprises multiple spring 404 loaded projecting body 406 which are designed to be positioned adjacent to negative tabs 106 of the pouch cells 112 and then moved in a direction to bend the same. Similarly, the first fixture 402 is positioned adjacent to the positive tabs 104 and then moved opposite to the first direction to bend the same over the negative tab 106. In other words, the tabs 104, 106 are either bent individually or multiple tabs 104, 106 together. The negative tab 106 are designed to be bigger in dimension than the positive tab 104, however vice-versa is also possible. The above structure and mechanism is shown in two views, where in the first side-view 400, the first fixture 402 is positioned before bending the tabs 104, 106. In a second side view 410, the first fixture 402 is in a position after bending the tabs 104, 106. The folded/bent tabs 104, 106 over the contact land 108 is represented by numeral 414. The series 412 shows the multiple bent tabs 104, 106. The projecting body 406 are fixed using bolts and nuts/fasteners as known in the art. In an embodiment, a load sensor is also used to ensure the load on the tabs 104, 106 does not exceed a threshold limit, which if breached may causes damage.
[0020] The first fixture 402 bends the positive tabs 104 and the negative tabs 106 before welding as shown in Fig. 5. The roller heads 408 is attached to the projecting body 406 (or taper body) which bends the tabs 104, 106 of the pouch cells 112 before the roller head 408 applies load to ensure a permanent bend. The first fixture 402 provides load on tabs 104, 106 of each pouch cell 112 which maintains zero gap therebetween during welding.
[0021] Fig. 5 illustrates a second fixture comprising a pressing mechanism in a first state, according to an embodiment of the present invention. A first full-side view 500 is shown with two rows of second fixtures 502 positioned on the plate 202. A first detailed view of one of the second fixture 502 is shown below the first fullside view 500. The second fixture 502 comprises the pressing mechanism which is explained in detail. The pressing mechanism comprises a pair of cylindrical bars 506 with coaxial springs 518 held between a support beam 504 and a press beam 508. A head 508 of the cylindrical bar 506 is secured to the press beam 508, and a tail end 520 of the cylindrical bar 506 is threaded and fastened on other side of the support beam 504 through a tightening member 522. The press beam 508 is designed to engage with tabs 104, 106 of the pouch cell 112 through a contact member 510. The support beam 504 and the press beam 508 comprises respective third cut-out/slot 524 and a first cut-out/slot 512 and second cut-out 514 to expose pressed tabs 104, 106 for welding. For example, slots of 10mm wide (or other dimensions) are provided for the laser focus while also maintaining pressure onto the contact land 108 on a Printed Circuit Board (PCB) 116. The tabs 104, 106 for positive terminal and negative terminal are of unequal width and of different/same material. Again, spacers 212 are used for the mounting of the plate 202 such that the second fixture 502 is easily positioned over the tabs 104, 106 for processing or the housing 102 with stacked pouch cells 112 is easily positioned beneath the second fixture 502. In an embodiment, the load sensor is also used to ensure the load on the tabs 104, 106 does not exceed a threshold limit, which if breached may causes damage to the tabs 104, 106. Further, the press member 508 is adjoined with the contact member 510 to engage with the bent tabs 104, 106. The contact member 510 is non-conductor of electricity to avoid any electrical faults due to metallic nature of press member 508 and the bent tabs 104, 106. The contact member 510 is made of material such as plastic or resin or rubber and not limited to the same.
[0022] According to an embodiment of the present invention, an apparatus/equipment 200 to process tabs 104, 106 of the pouch cells 112 during assembly of the battery packs 100 is provided. The battery pack 100 having the housing 102 with stacked pouch cells 112, and tabs 104, 106 of the pouch cells 112 passes through and held by the holder member 114 within the housing 102. The equipment 200 comprises the frame enclosure 210 with the base 204 and side walls to accommodate the battery pack 100 during assembly, characterized in that, the plate 202 positioned on the free end 220 of the frame enclosure 210 in removable manner. The plate 202 is positioned opposite to the base 204. The plate 202 is provided with the second fixture 502 comprising the pressing mechanism.
[0023] The plate 202 is lowered once asset of alignment pins 222 are aligned with housing 102 during which the plate 202 compresses the coaxial spring 518. The plate 202 is fastened at four locations to fix the plate 202 in position and to resist the reaction force from the coaxial spring 518. The compression in the coaxial spring 518 therefore applies load onto the tabs 104, 106 of the pouch cells 112 which helps to maintain zero air gap between the positive tabs 104 and negative tabs 106 during welding. The load applied onto the individual positive tabs 104 and the negative tabs 106 is confirmed by the integrated load sensors.
[0024] Fig. 6 illustrates the second fixture with pressing mechanism in a second state, according to an embodiment of the present invention. The construction of the second fixture 502 remains same as explained in Fig. 5. However, the operating state has changed to second state as shown in second full-side view 600, where the pressing force is applied to the bent tabs 104, 106 of the pouch cells 112. In a first step, the spacers 212 as shown in Fig. 5 is removed which makes the second fixture 502 rest directly on the tabs 104, 106. In the following step, the tightening members 522 on the support beam 504 are rotated all at once to uniformly distribute pressing force on the bent tabs 104, 106. Once the predetermined load is applied, a laser welding or other suitable welding is used to weld the tabs 104, 106 and the contact land 108 through the slots 512, 514 and 524.
[0025] Fig. 7 illustrates a top view of the second fixture, according to an embodiment of the present invention. In the second fixture 502, every pair of tabs 104, 106 which are bent over each other is provided with the second fixture 502. In the top view, only the support beam 504 is visible, whereas the rest of the structure is beneath the same. The first cut-out 512 provides opening for welding the smaller tab with the bigger tab. The second cut-out 514 provides opening for welding the bigger tab with the contact land 108 (contact strip) on the PCB 116. The tightening member 522 is provided on both ends of the support member 504. The coaxial spring 518 is in compressed start till the welding is complete.
[0026] According to an embodiment of the present invention, the positive tab 104 is made of aluminum material, and the negative tab 106 is made of copper material and the contact land 108 on the PCB 116 mounted on the holder member 114 is made of copper material. The positive tab 104 is smaller in dimension than the negative tab 106. The dimension and the material are explained as an example and must not be understood in limiting manner. The welding is done at two places, i.e. contact land 108 and the negative tab 106 through the first cut-out 512, and then positive tab 104 and the negative tab 106 through the second cut-out 514.
[0027] According to an embodiment of the present invention, the changeover between the first fixture 402 and the second fixture 502 with corresponding bending mechanism and pressing mechanism, and movement of the movable platform 206, and placement and removal of spacers 212 is at least one of a manual means, automated means, and semi-automatic means. The manual means comprises the operator handling the complete assembly process with tools. The automatic means comprises the use of automation known in the art such as hydraulics, pneumatics, etc. for the assembly of the battery pack 100. The semi-automatic means comprises the use of part operator and part automation. An Electronic Control Unit (ECU) is made use of for the operation through automatic and semi-automatic means which makes of many sensors such as load sensor.
[0028] In addition, either a single equipment 200 is provided for one assembly line where the fixture 216 for the plate 202 is changed between the first fixture 402 and the second fixture 502. Alternatively, two separate equipment 200 provided where one equipment 200 is for bending mechanism and the second equipment 200 is for the pressing mechanism. [0029] According to an embodiment of the present invention, the fixture 216 is either permanently provided on the plate 202, or the plate 202 is provided with fixing of the first fixture 402 and the second fixture 502. One plate 202 each with first fixture 402 and the second fixture 502 or a common plate 202 for both the first fixture 402 and the second fixture 502, but usable one after the other. In case of the common plate 202, the first fixture 402 and second fixture 502 are removably fixable to the plate 202.
[0030] Fig. 8 illustrates a method for processing tabs of pouch cells during assembly of a battery pack, according to the present invention. The pouch cells 112 are stacked inside the housing 102 and tabs 104, 106 of the pouch cells 112 passes through and held by the holder member 114 within the housing 102. The method is characterized by plurality of steps, of which a step 802 comprises placing the housing 102 with the stacked pouch cells 112 inside the frame enclosure 210 for assembly. A step 804 comprises positioning the plate 202 with any one of the first fixture 402 and the second fixture 502 over the frame enclosure 210. A step 806 comprises processing tabs 104, 106 of the plurality of pouch cells 112 according to selected fixture 216.
[0031] According to the present invention, the first fixture 402 comprises plurality of projecting body 406 with roller heads 408 extending from the plate 202. When the plate 202 with the first fixture 402 is used, the method comprises plurality of steps, of which a step 808 comprises moving the plurality of projecting body 406 with the roller heads 408 in a first direction transverse to a first set of plurality of tabs 104, 106 and bending the first set of plurality of tabs 104, 106. A step 810 comprises moving the plurality of projecting body 406 with the roller head 408 in a second direction opposite to the first direction and bending the second set of plurality of tabs 104, 106 over the first set of tabs 104, 106 which are already bent. The first set of plurality of tabs 104, 106 corresponds to those which are to be bent in the same direction at once. Consequently, the second set of plurality of tabs 104, 106 are those which are bent over the already bent tabs 104, 106 from the first set of plurality of tabs 104, 106. It is to be noted, that individual or group bending of tabs 104, 106 is possible.
[0032] According to the present invention, the second fixture 502 comprises the pair of cylindrical bars 506 with the coaxial springs 518 held between the support beam 504 and the press beam 508. The head 516 of the cylindrical bar 506 is secured to the press beam 508, and the tail end 520 of the cylindrical bar 506 is threaded and fastened on other side of the support beam 504 through the tightening members 522. When the plate 202 with the second fixture 502 is used, the method comprises plurality of steps of which a step 812 comprises tightening the tightening members 522 and pressing the press beam 508 on bent tabs 104, 106 of plurality of the pouch cells 112 and maintaining pressure on the bent tabs 104, 106 at the predetermined pressure. A step 814 comprises welding the bent tabs 104, 106 through cut-outs 512, 514, 524 made in the pressing mechanism.
[0033] According to the present invention, the method with bending mechanism and pressing mechanism are independently implementable using the frame enclosure 210. Further, the equipment 200 and the method are usable in assembly line by either using the manual efforts or automatic or semi-automatic.
[0034] Further, the battery pack 100 is usable in any static or movable machines such as Uninterrupted Power Supply (UPS), inverters, and as traction battery and auxiliary battery in vehicles such as a two-wheeler such as scooter, motorcycle, a three-wheeler such as autorickshaw, a four wheeler such as cars, multi-wheel vehicles, off-road vehicles and water sports vehicles, snow-mobiles, etc.
[0035] In accordance to an embodiment of the present invention, an apparatus/equipment 200 to bend and weld the tabs 104, 106 of pouch cells 112 with the aid of mechanical spring and load sensor thereon is provided. In simple words, the present invention describes new development/ technology for bending and welding the tabs 104, 106 of the pouch cells 112. The positive tabs 104 and the negative tabs 106 of the pouch cells 112 are bended using the novel mechanism. In addition, the pressing mechanism makes use of load sensor to detect load acting on the tabs 104, 106 due to the spring compression. The pressing mechanism ensures force required to maintain zero air gap between the positive tabs 104 and negative tabs 106 of the pouch cells 112 during welding. Further, the movable platform 206 aids in positioning and alignment of the battery pack 100 on the base 204 of the equipment 200. The material for the tabs 104, 106 are chosen to withstand the subjected temperatures during welding. The housing 102 also comprises venting ports for gases to escape during welding.
[0036] It should be understood that embodiments explained in the description above are only illustrative and do not limit the scope of this invention. Many such embodiments and other modifications and changes in the embodiment explained in the description are envisaged. The scope of the invention is only limited by the scope of the claims.

Claims

We claim:
1. An equipment (200) to process tabs (104, 106) of pouch cells (112) during assembly of a battery pack (100), said battery pack (100) having a housing (102) with stacked pouch cells (112), and tabs (104, 106) of said pouch cells (112) passes through and held by aholder member (114) within said housing (102), said equipment (200) comprises a frame enclosure (210) with a base (204) and side walls to accommodate said battery pack (100) during assembly, characterized in that, a plate (202) positioned on a free end (218) of said frame enclosure (210) in removable manner, said plate (202) is opposite to said base (204), said plate (202) provided with a fixture (216) with respective mechanism to process said tabs (104, 106).
2. The equipment (200) as claimed in claim 1, wherein said base (204) of said frame enclosure (210) comprises guide rail (208) based movable platform (206) to enable movement of said housing (102) with stacked pouch cells (112) in and out of said frame enclosure (210).
3. The equipment (200) as claimed in claim 1, wherein said fixture (216) selectable from any one of first fixture (402) and a second fixture (502), wherein said first fixture (402) comprises a bending mechanism to bend tabs (104, 106) of said pouch cells (112), and said second fixture (502) comprises a pressing mechanism to press and hold tabs (104, 106) of said plurality of pouch cells (112) in pressed state for welding.
4. The equipment (200) as claimed in claim 3, wherein said bending mechanism requires said first fixture (402) fit with plurality of spring (404) loaded projecting body (406) with roller heads (408), said first fixture (402) engages with tabs (104, 106) of said pouch cells (112) through said roller heads (408) and bend tabs (104, 106) of said pouch cells (112) on movement in a bending direction. The equipment (200) as claimed in claim 3, wherein said pressing mechanism requires a pair of cylindrical bars (506) with coaxial springs (518) held between a support beam (504) and a press beam (508), a head (516) of said cylindrical bar (506) is secured to said press beam (508), and a tail end (520) of said cylindrical bar (506) is threaded and fastened on other side of said support beam (504) through a tightening member (522), said press beam (504) is designed to engage with tabs (104, 106) of said pouch cells (112), wherein said support beam (504) and said press beam (508) comprises cut-outs (512, 514, 524) to expose pressed tabs (104, 106) for welding, wherein tabs (104, 106) for positive terminal and negative terminal are or unequal width and of different material. The equipment (200) as claimed in claim 5, wherein said tightening members (522) on said support beam (504) are rotated all at once to uniformly distribute pressing force on said bent tabs (104, 106). The equipment (200) as claimed in claim 3, wherein changeover between said first fixture (402) and said second fixture (502) with corresponding bending mechanism and pressing mechanism, and movement of said movable platform (206) is at least one of a manual means, automated means, and semi-automatic means. A method for processing tabs (104, 106) of pouch cells (112) during assembly of a battery pack (100), said pouch cells (112) are stacked inside ahousing (102) and tabs (104, 106) of said pouch cells (112) passes through and held by a holder member (114) within said housing (102), characterized by, said method comprises the steps of: placing said housing (102) with said stacked pouch cells (112) inside a frame enclosure (210) for assembly; positioning a plate (202) with any one of a first fixture (402) and a second fixture (502) over said frame enclosure (210), and processing said tabs (104, 106) of said plurality of pouch cells (112) according to selected fixture (216). The method as claimed in claim 8, wherein said first fixture (402) comprises plurality of projecting body (406) with roller heads (408) extending from said plate (202), and when said plate (202) with said first fixture (402) is used, said method comprises the steps of: moving said plurality of projecting body (406) with said roller heads (408) in a first direction transverse to a first set of plurality of tabs (104, 106) and bending said first set of plurality of tabs (104, 106); moving said plurality of projecting body (406) with roller head (408) in a second direction opposite to said first direction and bending said second set of plurality of tabs (104, 106) over said first set of tabs (104 106) which are already bent. The method as claimed in claim 8, wherein said second fixture (502) comprises a pair of cylindrical bars (506) with coaxial springs (518) held between a support beam (504) and a press beam (508), a head (516) of said cylindrical bar (506) is secured to said press beam (508), and a tail end (520) of said cylindrical bar (506) is threaded and fastened on other side of said support beam (504) through a tightening member (522), and when said plate (202) with said second fixture (502) is used, said method comprises the steps of, tightening said tightening members (522) and pressing said press beam on bent tabs (104, 106) of plurality of said pouch cells (112) and maintaining pressure on said bent tabs (104, 106) at a predetermined pressure, and welding said bent tabs (104, 106) through cut-outs (512, 514, 524) made in said pressing mechanism. Dated 5 July 2022 (Digitally signed)
Siddharth Karkhanis (IN/PA- 1195) On-behalf of the Applicants
PCT/EP2023/064954 2022-07-05 2023-06-05 An equipment and method to process tabs of pouch cells during assembly of battery packs WO2024008369A1 (en)

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IN202241038579 2022-07-05

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107009026A (en) * 2017-05-17 2017-08-04 中国第汽车股份有限公司 A kind of welding technique and device of electrokinetic cell monomer
CN211840589U (en) * 2019-12-20 2020-11-03 大族激光科技产业集团股份有限公司 Welding tool
US20200368855A1 (en) 2018-04-04 2020-11-26 Lg Chem, Ltd. Pressurization jig for pressurizing busbar and battery module manufacturing system comprising same
CN214770260U (en) * 2021-04-23 2021-11-19 深圳泰德激光科技有限公司 Battery module utmost point ear laser welding equipment
CN215299459U (en) * 2021-06-24 2021-12-24 珠海中力新能源科技有限公司 Welding pressing device
CN114024016A (en) * 2021-12-01 2022-02-08 武汉力神动力电池系统科技有限公司 Shaping device for soft package power battery tab

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107009026A (en) * 2017-05-17 2017-08-04 中国第汽车股份有限公司 A kind of welding technique and device of electrokinetic cell monomer
US20200368855A1 (en) 2018-04-04 2020-11-26 Lg Chem, Ltd. Pressurization jig for pressurizing busbar and battery module manufacturing system comprising same
CN211840589U (en) * 2019-12-20 2020-11-03 大族激光科技产业集团股份有限公司 Welding tool
CN214770260U (en) * 2021-04-23 2021-11-19 深圳泰德激光科技有限公司 Battery module utmost point ear laser welding equipment
CN215299459U (en) * 2021-06-24 2021-12-24 珠海中力新能源科技有限公司 Welding pressing device
CN114024016A (en) * 2021-12-01 2022-02-08 武汉力神动力电池系统科技有限公司 Shaping device for soft package power battery tab

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