SE546408C2 - Battery cell and method of assembly - Google Patents

Battery cell and method of assembly

Info

Publication number
SE546408C2
SE546408C2 SE2330563A SE2330563A SE546408C2 SE 546408 C2 SE546408 C2 SE 546408C2 SE 2330563 A SE2330563 A SE 2330563A SE 2330563 A SE2330563 A SE 2330563A SE 546408 C2 SE546408 C2 SE 546408C2
Authority
SE
Sweden
Prior art keywords
laser
enclosure
closure
clad
weld
Prior art date
Application number
SE2330563A
Other languages
Swedish (sv)
Other versions
SE2330563A1 (en
Inventor
Brendan Sexton
Dennis Bein
Original Assignee
Northvolt Ab
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 Northvolt Ab filed Critical Northvolt Ab
Priority to SE2330563A priority Critical patent/SE546408C2/en
Publication of SE2330563A1 publication Critical patent/SE2330563A1/en
Publication of SE546408C2 publication Critical patent/SE546408C2/en

Links

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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • 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
    • H01M10/0422—Cells or battery with cylindrical casing
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

A method of assembling a cylindrical battery cell (1) comprising: obtaining (70) an enclosure (2) of a battery cell (1) having at least one open enclosure end (2b), the enclosure (2) containing an electrode assembly (20) and having an end-closure (60) placed against the open enclosure end (2b); performing (71) a first laser cladding process using a laser (30) and a dispenser (32), wherein the laser (30) is configured to apply laser energy and the dispenser (32) is configured to concurrently dispense an additive material to form a clad laser weld, wherein the clad laser weld comprises a laser weld between the enclosure (2) and the end-closure (60) that comprises the additive material at least bonded on an outside surface of the laser weld.

Description

BATFERY CELL AND IVIETHOD OF ASSEIVIBLY Field The present disclosure relates to a battery cell and a method of assembly of a »battery cell. In particular, it relates to the closing of a can of the battery cell by laser clad welding together of an end-closure and the can. It also relates to a battery Background During the assembly of a battery cell, a can, which forms the enclosure for the battery cell receives the internal components of the battery cell, such as an electrode assembly, and is closed by a lid or end-closure. The lid or end-closure may be affixed to the can by welding.
Ensuring a reliable assembly process and longevity of the assembled battery cell is a challenge. tiíš Etitilšüišïietie ei. is ceneeiteti titfitti a hatterv attwitieti iaitti a tiattetv in iitihith a bath: a hatterv iaatitf fit te each tithei' eahtit-:ttteti th: iaaei" ttiiziaiha. Kit .ïítiíiïtitšêšïšišš A ia cenet-:rneti with a hatten; teii iinantiiaetiitiria itiettietí an eiettttahic tietiite, intieiifina niaiihtiitie the eatiietie anti aeeatatieii fiitti tivithiti the the htiettii thateriai, iii taiiieit the set te tantaet taitii the ihnet atirtaee ef the eieetreae terntiitiai ia iii âütiititiíššêšt e. eeiieetiieti iftitii a rhaiitttaettiiiiiti tnethati a iaattetv iiviiitii iaieveiits matter' train iiiixiiia in aieitieti eart hv ittatiiatiiiti inner surface ai* tiie battait a battetv ctihtaihei' te iaaeietiifeiti a tetiitiirai heaiti te its etitei' saitace. KR. 2ti§i1ii3§ši9fi.tštš .ft ia. teaterns-za a nwethati tai' tïiteïaatititi a battery th' tiieitiiiia a staiiiieas steei ei' aitimihtiiti tiaiiiti a iaai-zi", ta achieve taeiti tiiieitiina teithetit the ehanae at ehatacteriatiea ai' eieetreiifte saititiah aaaatiatt-:a iiiiitii heat inaait. liP tšititfiïšeeš :t eaheiztnt-:a twitti ah ittietatieiitient ih inethaa ef inantifacttititia battery, iii taiiieii a tietititietai eiitie tiattiah at a hatterv is iaaeieiiteitieti.
Summary The šnxferatšosw defined šfiv the apbended claims. ::.::.:_..:~“:.ïš:~;;,. iïc; fïrxï: :_.::;§::..::íi :f ut... W ...t V; .\:;.\..\_:_. .V _ ut... . . .;.\:,. s: _. “t !\_~ :vH ..>\-\_~\ En .2~\.«..!\,-\_-5.»h u “I !\_~\ \.< b» rv) \.~ v ~\»!\.«.2 'x .A: a method of assembling a cylindrical battery cell comprising: obtaining an enclosure of a battery cell having at least one open enclosure end, the enclosure containing an electrode assembly and having an end-closure placed against the open enclosure end; performing a first laser cladding process using a laser and a dispenser, wherein the laser is configured to apply laser energy and the dispenser is configured to concurrently dispense an additive material to form a clad laser weld, wherein the clad laser weld comprises a laser weld between the enclosure and the end-closure that comprises the additive material at least bonded on an outside surface of the laser weld.
In one or more embodiments, the end-closure comprises a lid.
In one or more embodiments, the method includes: performing a further laser cladding process by application of laser energy and dispensing of an additive material to the lid to form a laser weld between the lid and the electrode assembly within the enclosure, wherein an outside surface of the lid that receives the laser energy is clad in the additive material.
In one or more embodiments, the further laser cladding process is performed by one of: the laser and the dispenser that performs the first laser cladding process, or a different laser and a different dispenser.
In one or more embodiments, the additive material, when laser clad to the battery cell, provides corrosion resistance.
In one or more embodiments, obtaining the enclosure of the battery cell comprises obtaining the enclosure of the battery cell in a mount and rotating the enclosure, by the mount, concurrently with the application of the laser energy and the dispensing of the additive material to form the clad laser weld around the end-closure.
In one or more embodiments, performing the first laser cladding process comprises moving the laser concurrently with the application of the laser energy and the dispensing of the additive material to form the clad laser weld around the end-closure.
In one or more embodiments, the electrode assembly comprises a plurality of tabs projecting from the electrode assembly and the further laser cladding process forms a weld between the lid and the plurality of tabs.
In one or more embodiments, the electrode assembly comprises one or more anode electrode sheets and one or more cathode electrode sheets and one or more separator sheets to separate the anode and cathode electrode sheets, wherein the further laser cladding process forms a weld between the lid and an edge of the one or more anode electrode sheets or the one or more cathode electrode sheets.
In one or more embodiments, the end-closure being placed against the open enclosure end comprises the end-closure being held by friction fit at the open enclosure end.
In one or more embodiments, the enclosure of the battery cell comprises a first open enclosure end and a second open enclosure end and the method includes: performing a second laser cladding process using a laser and a dispenser, wherein the laser is configured to apply laser energy and the dispenser is configured to concurrently dispense an additive material to form a clad laser weld, wherein the clad laser weld comprises a laser weld between the enclosure and an end-closure at the second open enclosure end that comprises the additive material at least bonded on an outside surface of the laser weld; wherein said first laser cladding process provides for the clad laser weld between the enclosure and the end-closure at the first open enclosure end.
In one or more embodiments, the second laser cladding process is performed by one of: the laser and the dispenser that performs the first laser cladding process, or a different laser and a different dispenser.
According to a second aspect of the present disclosure there is provided a battery cell comprising an enclosure configured to receive an electrode assembly, wherein the enclosure comprises at least one open enclosure end closed by an end-closure, wherein a clad laser weld is present between the end-closure and the enclosure, wherein the clad laser weld comprises a laser weld between the enclosure and the end-closure that comprises an additive material at least bonded on an outside surface of the laser weld by virtue of being formed by a laser cladding process.
The battery cell may comprise a secondary battery cell.
In one or more embodiments, the battery cell comprises a further clad laser weld between the end-closure and the electrode assembly wherein an outer surface of the end-closure proximal a laser weld between the end-closure and the electrode assembly within the enclosure is clad with the additive material by virtue of being formed by a laser cladding process.
According to a third aspect of the present disclosure there is provided vehicle comprising a battery cell of the second aspect or a battery cell assembled by the method of the first aspect. ..--«battery energy storage system comprising a battery cell of the second aspect or a battery cell assembled by the method of the first aspect.
While the disclosure is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that other embodiments, beyond the particular embodiments described, are possible as well. All modifications, equivalents, and alternative embodiments falling within the spirit and scope of the appended claims are covered as well.
The above discussion is not intended to represent every example embodiment or every implementation within the scope of the current or future Claim sets. The figures and Detailed Description that follow also exemplify various example embodiments. Various example embodiments may be more completely understood in consideration of the following Detailed Description in connection with the accompanying Drawings.
Brief Description of the Drawings One or more embodiments will now be described by way of example only with reference to the accompanying drawings in which: Figure 1 shows an example embodiment of laser cladding of a cylindrical secondary battery cell in cross-section; Figure 2 shows an example embodiment of an assembly process; Figure 3 shows a further example of a lid and an enclosure welded closed by the application of laser clad welding;

Claims (15)

1. A method of assembling a cylindrical battery cell ,§_1__3___comprising: obtaining fišjwan enclosure iggwof a battery cell gggwhaving at least one open enclosure endiíšïwfg, the enclosure Qjgncontaining an electrode assembly and having an end-closure íflåígfiflplaced against the open enclosure endwíåmtïgå; performing first laser cladding process using a lasergifi), and a dispenser “Išišh wherein the laser ífiëwis configured to apply laser energy and the dispenser §_§_š,2_}__is configured to concurrently dispense an additive material to form a clad laser weld, wherein the clad laser weld comprises a laser weld between the enclosure _í_;~"_í_]g___and the end-closure _f§_§§_íj__3___that comprises the additive material at least bonded on an outside surface of the laser weld.
2. The method of claim 1, wherein the end-closure šñíšš comprises a lid íííšg.
3. The method of claim 2, wherein the method includes: performing íïïma further laser cladding process by application of laser energy and dispensing of an additive material to the lid _§_3t_§3_}__to form a laser weld between the lid j(__jg__å)_f¿___and the electrode assembly j(__;§_å_“;_}___within the enclosure___j(__;'¿}_, wherein an outside surface of the lid _{__;_t___í,š__}___that receives the laser energy is clad in the additive material.
4. The method of claim 3, wherein the further laser cladding process is performed by one of: the laser íšüå and the dispenser íššš that performs § ïëfïë the first laser cladding process, or a different laser and a different dispenser.
5. The method of any preceding claim, wherein the additive material, when laser clad to the battery cell___§_i_f¿_, provides corrosion resistance.
6. The method of any preceding claim, wherein obtaining the enclosure _§_2_§__of the battery cell ígjncomprises obtaining the enclosure Qgmof the battery cell ígjnin a mount and rotating the enclosurewšvšjfi, by the mount, concurrently with the application of the laser energy and the dispensing of the additive material to form the clad laser weld around the end-closure íšíšg.
7. The method of any preceding claim, wherein performing _f\'_'_§?__1__3___the first laser cladding process comprises moving the laser ßíšš ____ __concurrent|y with the application of the laser energy and the dispensing of the additive material to form the clad laser weld around the end-closure íêišš.
8. The method of claim 3, wherein the electrode assembly íêüå comprises a plurality of tabs projecting from the electrode assembly ššíïfi and the further laser cladding process forms a weld between the lid šiíšë and the plurality of tabs.
9. The method of claim 3, wherein the electrode assembly §_;»_2_§=_f¿___comprises a one or more anode electrode sheets _í_;¿_;~"_í__1=____and one or more cathode electrode sheets and one or more separator sheets to separate the anode and cathode between the lid íííšä and an edge of the one or more anode electrode sheets -fššš electrode sheets , wherein the further laser cladding process forms a weld or the one or more cathode electrode sheets íâïä. sig. The method of any preceding claim, wherein the end-closure íášíš; being placed against the open enclosure end _{_J_.:_lg_§__comprises the end-closure §__š§_Ü_}___being held by friction fit at the open enclosure end___{_;;_b_§_. The method of claim 1, wherein the enclosure _§2._}___of the battery cell _{_§._§_ comprises a first open enclosure end gjfijfland a second open enclosure end and the method includes: performing a second laser cladding process using a laser íišíífimand a dispenserijggg, wherein the laser configured to apply laser energy and the dispenser íjšmgušwis configured to concurrently dispense an additive material to form a clad laser weld, wherein the clad laser weld comprises a laser weld between the enclosure _f\'_;_1_}___and an end-closure _§_§§}§__at the second open enclosure end _{_¿l_2__a_f¿__that comprises the additive material at least bonded on an outside surface of the laser weld; wherein said first laser cladding process provides for the clad laser weld at the first open enclosure endjiâmàtgi.-í--ít-ijg, The method of claim -íë-Qijg, wherein the second laser cladding process is performed by one of: the laser íågïímand the dispenser _{_3_;¿_)___that performs the first laser cladding process, or a different laser and a different dispenser. A battery cell glåmcomprising an enclosure ígšlmconfigured to receive an electrode assemblymígßg, wherein the enclosure Qjwcomprises at least one open enclosure end gåiglmclosed by an end-closureàíflg, wherein a clad laser weld is present between the end-closure ínšågïšmïwand the enclosuremígg, wherein the clad laser weld comprises a laser weld between the enclosure §_;_I¿§___and the end-closure í§>33_}__that comprises an additive material at least bonded on an outside surface of the laser weld by virtue of being formed by a laser cladding process. A battery cell ípijgmof claim wherein the battery cell íggflcomprises a second clad laser weld between the end-closure ífiigfland the electrode assembly fijwwherein an outer surface of the end-closure ífiijmproximal a laser weld between the end-closure ífiëmand the electrode assembly Qßgmwithin the enclosure ígšwis clad with the additive material by virtue of being formed by a laser cladding process. A vehicle comprising a battery cell _{__i_}___of claim or claim or a battery cell _{__?_à._}___assembled by the method of any one of claims 1 to
SE2330563A 2023-12-15 2023-12-15 Battery cell and method of assembly SE546408C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE2330563A SE546408C2 (en) 2023-12-15 2023-12-15 Battery cell and method of assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2330563A SE546408C2 (en) 2023-12-15 2023-12-15 Battery cell and method of assembly

Publications (2)

Publication Number Publication Date
SE2330563A1 SE2330563A1 (en) 2024-10-29
SE546408C2 true SE546408C2 (en) 2024-10-29

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Family Applications (1)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6065443A (en) * 1983-09-20 1985-04-15 Hitachi Maxell Ltd Manufacturing method for sealed type battery
US20030157404A1 (en) * 1998-09-17 2003-08-21 Takefumi Inoue Battery and producing method thereof
KR20040089168A (en) * 2003-04-10 2004-10-21 (주)한빛레이저 A battery manufacturing process by pulsed laser welding technologies for the low heat input
JP2006019221A (en) * 2004-07-05 2006-01-19 Japan Storage Battery Co Ltd Battery manufacturing method
KR20170087296A (en) * 2016-01-20 2017-07-28 주식회사 엘지화학 Method of Manufacturing Battery Cell Comprising Metal Layer at Welded Portion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6065443A (en) * 1983-09-20 1985-04-15 Hitachi Maxell Ltd Manufacturing method for sealed type battery
US20030157404A1 (en) * 1998-09-17 2003-08-21 Takefumi Inoue Battery and producing method thereof
KR20040089168A (en) * 2003-04-10 2004-10-21 (주)한빛레이저 A battery manufacturing process by pulsed laser welding technologies for the low heat input
JP2006019221A (en) * 2004-07-05 2006-01-19 Japan Storage Battery Co Ltd Battery manufacturing method
KR20170087296A (en) * 2016-01-20 2017-07-28 주식회사 엘지화학 Method of Manufacturing Battery Cell Comprising Metal Layer at Welded Portion

Also Published As

Publication number Publication date
SE2330563A1 (en) 2024-10-29

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