CN106098974A - 锂电池电芯方形壳体制造方法 - Google Patents
锂电池电芯方形壳体制造方法 Download PDFInfo
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- CN106098974A CN106098974A CN201610602912.5A CN201610602912A CN106098974A CN 106098974 A CN106098974 A CN 106098974A CN 201610602912 A CN201610602912 A CN 201610602912A CN 106098974 A CN106098974 A CN 106098974A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 10
- 238000005476 soldering Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000007493 shaping process Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 16
- 229910000679 solder Inorganic materials 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 8
- 239000003870 refractory metal Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 239000002390 adhesive tape Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 239000000470 constituent Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 239000010935 stainless steel Substances 0.000 abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract 2
- 238000005219 brazing Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
-
- 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)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
锂电池电芯方形壳体制造方法：本发明与锂电池有关，电芯方形壳体目前多采用不锈钢拉伸成形工艺制造，该法需要多道次拉伸，对模具及机床精度要求高，模具磨损快，该法具有生产效率低、生产成本高的缺点。本发明采用成形快速的常温冲压成形/钎焊组合工艺，具有生产效率高，模具损耗轻微，模具费用较低，综合生产成本低的特点，可应用于锂电池电芯方形壳体的大批量生产。
Description
本发明与锂电池有关。
锂电池是为手机等提供能源的重要配件，而锂电池的核心则是电芯，电芯由壳体、盖板、电极、电解液等组成。电芯的方形壳体呈扁平状，一端开口，如图1所示，壳体尺寸一般在：厚度(t)3-12mm，长(1)30-80mm，宽(w)20-60mm，在上部开口，将来与盖板焊接密封，目前倾向于采用不锈钢制造，国内大量从国外进口的不锈钢壳体是采用多道次拉伸成形工艺制造的，由于拉伸比大，为制造一个不锈钢壳体，要经过八道次以上的拉伸，该工艺要求有相应道次的多套精密成形模具，各道次之间还需要进行退火处理，因此该工艺生产效率低，模具磨损较快，生产成本高。
为克服现有技术的局限性，特提出本发明。
本发明公开了锂电池电芯方形壳体的制造方法，壳体材料采用不锈钢薄板为原料，在冲床上利用落料模进行落料、成形模进行成形，制成图2所示的开放式成形件，将成形件清洗干净后，在专用夹具中装配在一起，采用点焊机将成形件点焊定位在一起，以保证较小的钎焊间隙，然后在成形件接缝间隙处放置镍基合金钎料粉末和高熔点金属粉末组成的混合物，其中高熔点金属粉末重量百分比为1-50％，高熔点金属粉末为镍粉，不锈钢粉，钴粉，铜粉中的一种或几种的混合物。钎料可以采用粘带钎料，也可将钎料粉末与胶粘剂、溶剂混合在一起以料浆的形式涂在焊缝处，干燥后入炉钎焊，钎焊可以在真空高温钎焊炉中进行，也可以在氩气保护下进行高温钎焊，镍基合金钎料在达到其液相线温度后开始流动，在毛细力作用下填缝，在保温一定时间降温后，焊缝处钎料凝固，在冷至低温出炉后即得到电芯壳体。采用镍基合金钎料粉末和高熔点金属粉末组成的混合物钎焊，其主要目的是可以避免钎缝处漏气，其中高熔点金属粉末起到降低熔化后钎料流动性的作用，并允许在钎缝处形成一定厚度的焊层。
采用本发明的方法制造手机电池电芯壳体具有以下优点：壳体由于不采用拉伸成形工艺，而是采用成形快速的常温冲压成形，不用加热，因此生产效率高，模具损耗轻微，并且仅用2套模具即可完成，模具费用较低，综合生产成本低。
附图的简要说明。
图1为电芯壳体的立体示意图，T表示壳体厚度，L表示壳体长度，W表示壳体宽度；
图2为本发明的一种开放式组件的示意图；其翻边高度H为成品壳体厚度的一半。
实施例：为制造尺寸如下：厚度5m，长47m，宽30m的电芯方形壳体，可以按下面地方法制造，首先利用落料模进行落料；然后利用成形模进行成形；将成形后厚度为2.5mm，长47mm，宽30mm，如图2所示的一半壳体两两对在一起，在夹具中用电容储能点焊机点焊定位，将装配好的壳体焊缝处涂覆料浆状的钎料，料浆钎料中钎料采用BNi-2加20wt.％的304不锈钢粉末，粒度为-150目，二者混合均匀后，加入聚苯乙烯的二甲苯溶液或光学树脂溶液作粘接剂，丙酮作为稀释剂。将干燥后待焊的壳体组件放入真空高温钎焊炉中进行钎焊，炉温升至350-550℃后保温20-60分钟，待粘接剂基本分解完毕后继续升温至1060℃，并保温8-30分钟，然后炉冷降至室温即可出炉。
Claims (7)
1.锂电池电芯方形壳体制造方法，其特征在于壳体材料采用不锈钢薄板为原料，首先在冲床上进行落料、成形，然后将成形件组合装配在一起，经点焊定位后，在钎缝处放入钎料，然后采用钎焊工艺将焊缝焊封起来，形成一端开口的方形电芯壳体。
2.根据权利要求1所述的钎料，其特征在于钎料是由镍基合金钎料粉末和高熔点金属粉末组成的混合物，其中高熔点金属粉末重量百分比为3-50％，高熔点金属粉末为镍粉，不锈钢粉，钴粉，铜粉中的一种或几种的混合物。
3.根据权利要求1所述的钎料，其特征在于钎料是做成粘带形式。
4.根据权利要求1所述的钎料，其特征在于钎料是做成料浆形式。
5.根据权利要求1所述的钎焊工艺，其特征在于钎焊是在真空高温钎焊炉中进行的。
6.根据权利要求1所述的钎焊工艺，其特征在于钎焊是在氩气气氛保护下进行的。
7.根据权利要求2所述的镍基合金钎料，其特征在于该合金钎料为BNi-2钎料粉末，粒度-150目。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108099363A (zh) * | 2017-11-28 | 2018-06-01 | 苏州安飞荣工业科技有限公司 | 一种锂电池外壳自动压印装置 |
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2016
- 2016-07-24 CN CN201610602912.5A patent/CN106098974A/zh active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108099363A (zh) * | 2017-11-28 | 2018-06-01 | 苏州安飞荣工业科技有限公司 | 一种锂电池外壳自动压印装置 |
| CN108099363B (zh) * | 2017-11-28 | 2021-02-19 | 济南泰泉森信息咨询有限公司 | 一种锂电池外壳自动压印装置 |
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