WO2014188774A1 - Procédé de fabrication et dispositif de fabrication d'accumulateur de type stratifié - Google Patents

Procédé de fabrication et dispositif de fabrication d'accumulateur de type stratifié Download PDF

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Publication number
WO2014188774A1
WO2014188774A1 PCT/JP2014/058176 JP2014058176W WO2014188774A1 WO 2014188774 A1 WO2014188774 A1 WO 2014188774A1 JP 2014058176 W JP2014058176 W JP 2014058176W WO 2014188774 A1 WO2014188774 A1 WO 2014188774A1
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WO
WIPO (PCT)
Prior art keywords
heat
lead terminal
welding
insulating material
secondary battery
Prior art date
Application number
PCT/JP2014/058176
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English (en)
Japanese (ja)
Inventor
大樹 藤原
泰元 金
松岡　孝
橋本　靜生
Original Assignee
日産自動車株式会社
富士インパルス株式会社
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 日産自動車株式会社, 富士インパルス株式会社 filed Critical 日産自動車株式会社
Priority to JP2015518132A priority Critical patent/JP6019224B2/ja
Publication of WO2014188774A1 publication Critical patent/WO2014188774A1/fr

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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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • 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
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • 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
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • 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
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/1245—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the external coating on the casing
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • 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

Definitions

  • the present invention relates to a method and apparatus for manufacturing a secondary battery called a laminate type or a thin type.
  • a laminated pack type (thin type) secondary battery represented by a lithium ion secondary battery a laminate type in which a battery element (power generation element) including a positive electrode, a negative electrode, and an electrolyte as electrodes is used as an exterior body.
  • the lead terminals surrounded by the outer film and electrically connected to the current collectors of the positive electrode and the negative electrode are led out of the outer film, and the peripheral edge of the outer film is formed into, for example, a rectangular bag by heat welding. Sealing or sealing treatment is performed to ensure airtightness as a battery and prevent leakage of the electrolyte inside.
  • covered the front and back both surfaces of the aluminum foil with the resin film, for example is used as the said exterior film.
  • Patent Document 1 As a specific means for performing heat welding on the exterior film, for example, as described in Patent Document 1, a so-called hot plate type pressure treatment that is always heated by incorporating a heat transfer heater is used. The outer peripheral film is sandwiched from both the front and back surfaces by the pressure jig, and heat welding is performed.
  • the present invention has been made paying attention to such a problem, and in particular, when performing thermal welding on the side portion of the exterior film from which the lead terminal is led out, by making the welding temperature uniform, it is possible to prevent thermal welding failure. It is intended to suppress the occurrence.
  • the present invention in applying heat welding by pressing and restraining the peripheral portion of the exterior film with a heat welding jig provided with a heater on the contact surface side with the exterior film, in the portion corresponding to the terminal portion of the electrode, The heat welding is performed with a heat insulating material interposed between the jig body of the heat welding jig and the heater.
  • the welding temperature can be made uniform between the portion where the terminal portion of the electrode is led out and the portion where the electrode terminal portion is not, and the occurrence of poor heat welding can be suppressed.
  • a highly reliable sealing or sealing process can be performed on the exterior film of the secondary battery.
  • FIG. 1 is a perspective view showing a schematic structure of a laminated lithium ion secondary battery applied to the practice of the present invention.
  • FIG. 2 is an exploded perspective view of the laminated lithium ion secondary battery shown in FIG. 1.
  • FIG. 2 is a diagram showing a heat welding apparatus as an embodiment of a manufacturing apparatus for a laminate type secondary battery according to the present invention, and is an enlarged cross-sectional explanatory view taken along line AA of FIG. It is the figure which expanded the left half part of FIG. 3, (A) is sectional drawing which shows the state from which the upper and lower heat welding jigs have separated, (B) is the upper and lower heat welding jigs approaching, and laminated film Sectional drawing which shows the state restrained by pressure.
  • FIG. 5 is an enlarged cross-sectional view taken along line BB in FIG.
  • FIG. 5 is an enlarged sectional view taken along the line CC in FIG.
  • FIG. 1 shows a lithium ion secondary battery (hereinafter, referred to as a laminate type secondary battery).
  • FIG. 2 shows an exploded perspective view of the schematic structure of the battery. This battery is used, for example, as a unit cell or a single battery of a lithium ion battery for an electric vehicle.
  • a lead terminal (positive electrode terminal portion) 2 as a positive electrode terminal and a lead terminal (negative electrode portion) 3 as a negative electrode terminal are led out to the outside.
  • the film is housed and sealed by a rectangular laminated film outer package 4 composed of two upper and lower laminated films 4a and 4b as an outer film.
  • the four circumferences of the laminate film outer package 4 are hermetically sealed or sealed by heat welding.
  • the four-round heat welded portion is denoted by reference numeral 6.
  • a battery element including a positive electrode and a negative electrode as electrodes, a separator, and an electrolyte solution is surrounded by a laminate film outer package 4, and each positive electrode and negative electrode current collector is enclosed.
  • the lead terminals 2 and 3 that are electrically connected are led out to the outside of the laminate film outer package 4, and the periphery of the laminate film outer package 4 is sealed or sealed in a rectangular bag shape by heat welding, for example. As a result, the airtightness of the battery 1 is secured.
  • the two upper and lower laminate films 4a and 4b forming the laminate film outer package 4 for example, a composite structure in which both front and back surfaces of an aluminum foil are covered with a heat-welding resin film is used.
  • both the lead terminals 2 and 3 are sometimes referred to as electrode tabs, and the positive lead terminal 2 is made of aluminum, for example, while the negative lead terminal 3 is Copper one is used.
  • Both lead terminals 2 and 3 are preliminarily subjected to a predetermined surface treatment, and are covered with a resin layer 7 (see FIG. 4) having heat welding properties and insulation properties.
  • FIG. 3 shows an enlarged cross-sectional view taken along line AA in FIG.
  • FIG. 4 shows an enlarged view of the portion corresponding to the lead terminal 2 on the positive electrode side in the left half of FIG. 5 and 6 are enlarged sectional views taken along lines AA and BB in FIG.
  • the thermal welding apparatus is mainly composed of a lower thermal welding jig 9 and an upper thermal welding jig 10 which are arranged to face each other so as to approach and separate from each other.
  • Both of the heat welding jigs 9 and 10 are made of, for example, stainless steel, and a portion that performs heat welding extends in the longitudinal direction of the heat welding portion 6 (see FIG. 1) of the laminate film exterior body 4 in a plan view.
  • the width dimension is set to be slightly larger than the width dimension of the heat-welded portion 6 of the laminate film outer package 4.
  • the upper and lower laminate films 4a and 4b to be the laminate film outer package 4 surrounding the laminate 5 in FIG. 2 are supported by a support member (not shown).
  • the lower thermal welding jig 9 and the upper thermal welding jig 10 are moved closer to each other, and the upper and lower laminate films 4a and 4b are pressure-restrained from above and below to apply the thermal welding to the corresponding part.
  • the laminate film exterior body 4 is finished.
  • the portion between the upper and lower laminate films 4 a and 4 b of the laminate film outer package 4 between the upper and lower laminate films 4 a and 4 b is directly welded. Since the positive lead terminal 2 is interposed and the laminate films 4a and 4b and the positive lead terminal 2 are thermally welded to each other, the thickness is inevitably different. Occurrence is inevitable. In order to cope with this step, the pressure restraining surfaces 9a and 10a, which are the contact surfaces with the laminate films 4a and 4b, of the upper and lower heat welding jigs 9 and 10 also have predetermined steps. .
  • the lower heat welding jig 9 includes a ribbon-shaped heater 13 along the longitudinal direction as an impulse-type heater through a glass tape 12 having electrical insulation and heat resistance on the upper surface of a stainless steel jig main body 11. It is pasted. Further, a heat-resistant fluororesin tape 14 is attached to the surface of the heater 13 to prevent the laminate film 4b from sticking. And the part corresponding to the lead terminal 2 on the positive electrode side of the pressure restraining surface 9a of the lower heat welding jig 9 which becomes the contact surface with the laminate film 4b at the time of heat welding corresponds to the step described above. Therefore, a concave portion 9b is formed.
  • a portion of the jig main body 11 of the lower heat welding jig 9 on the back side of the heater 13 and corresponding to the lead terminal 2 on the positive electrode side has a notch having a shape such as a concave shape. 9c is formed, and a heat insulating material 15 is fitted into the notch 9c. And the recessed part 9b used as a part of pressurization restraint surface 9a of the lower heat welding jig
  • tool 9 is formed in the upper surface of this heat insulating material 15. As shown in FIG.
  • the material of the heat insulating material 15 is a heat-resistant resin or rubber material.
  • the resin fully aromatic polyester, aromatic polyamide, poimide, polyethersulfone, polyamideimide, polybenzimidazole, polyether ether ketone (PEEK) are used.
  • the heat insulating material 15 is an elastic member having appropriate elasticity at the same time. Or the thing made from a fluororubber shall be used.
  • the upper thermal welding jig 10 is an inverted version of the lower thermal welding jig 9, and therefore the lower thermal welding jig 9 is the lower thermal welding jig 9.
  • the same reference numerals are given to the parts common to and the detailed description thereof will be omitted.
  • the ribbon-shaped heater 13 as the impulse-type heater described above is heated by instantaneously applying a low voltage / high current to generate heat and heating / melting the laminate films 4a and 4b as objects. Therefore, after the energization is completed, the pressure is maintained for a predetermined time and the cooling is performed.
  • the upper and lower heat welding jigs 9 and 10 are separated from each other, and the laminate 5 shown in FIG.
  • the two upper and lower laminate films 4a and 4b to be the surrounding laminate film outer package 4 are supported by a support member (not shown), and the parts to be thermally welded of these laminate films 4a and 4b are vertically heat welded jigs 9. , 10 to position.
  • the lower heat welding jig 9 and the upper heat welding jig 9 Together with the jig 10 the upper and lower laminate films 4 a and 4 b are pressed and restrained from above and below as shown in FIG. And in this pressurization restraint state, it impulse-energizes to each heater 13 and heat-welds.
  • the conventional so-called hot plate type heater requires about 13 seconds to complete the welding, whereas the impulse type heater 13 as described above completes the thermal welding in about 4 seconds.
  • the upper and lower two laminated films 4a and 4b are different from the part where the upper and lower laminated films 4a and 4b are directly heat-sealed. Since the lead terminal 2 is sandwiched between them, and the heat capacity of the lead terminal 2 itself is relatively large, part of the heat applied for heat welding escapes to the lead terminal 2 side, The temperature for welding at the site will be relatively low. On the other hand, except for the special feature that the heat capacity of the lead terminal 2 is large as described above, if attention is paid to the heat holding performance at the relevant part, each of the heaters 13 of the upper and lower heat welding jigs 9, 10.
  • the heat insulating material 15 is interposed on the back side and the portion corresponding to the lead terminal 2, for the heat insulating effect of the heat insulating material 15, in the heat welding portion in the portion corresponding to the lead terminal 2,
  • the heat transfer from each heater 13 to the jig body 11 side of the upper and lower heat welding jigs 9 and 10 can be suppressed, and the welding temperature can be kept relatively high.
  • the heat insulating material 15 is provided on the back side of the heater 13. Since it does not exist, a part of the heat escapes from the heater 13 to the jig body 11 side of the upper and lower heat welding jigs 9 and 10, and the temperature for welding at the part becomes relatively low. become.
  • the heat insulating material 15 makes it possible to maintain a high amount of heat at the portion, and as a result, the lead terminal
  • the welding temperature can be made substantially uniform between the portion corresponding to 2 and the portion not. Thereby, generation
  • the heat insulating material 15 is an elastic member such as silicone rubber or fluorine rubber having appropriate elasticity, it corresponds to the heat insulating material 15 among the pressure restraining surfaces 9a, 10a of the upper and lower heat welding jigs 9, 10.
  • the portion to be attached has good followability to the laminate films 4a and 4b between which the lead terminal 2 is sandwiched, and between the lead terminal 2 and the laminate films 4a and 4b or between the laminate films 4a and 4b and the upper and lower heat welding jigs 9,
  • the generation of a gap between the ten pressure restraint surfaces 9a and 10a can be suppressed, and more uniform heat welding can be performed. Therefore, this also improves the reliability of sealing or sealing treatment of the laminate film outer package 4.
  • FIG. 4 The description so far has been made based on FIG. 4 in which the portion corresponding to the lead terminal 2 on the positive electrode side in FIG. 3 is enlarged, but corresponds to the lead terminal 3 on the negative electrode side in FIG.
  • the structure and behavior of the part are basically the same as those in FIG.
  • the lead terminal 2 on the positive electrode side in FIG. 3 is made of aluminum, whereas the lead terminal 3 on the negative electrode side is made of copper. Then, copper (thermal conductivity: 386 W ⁇ m) used in the lead terminal 3 on the negative electrode side rather than aluminum (thermal conductivity: 237 W ⁇ m ⁇ 1 K ⁇ 1 ) used in the lead terminal 2 on the positive electrode side. -1 K -1 ) has a higher thermal conductivity.
  • the copper lead terminal 3 on the negative electrode side is larger than the thermal conductivity of the heat insulating material 15 corresponding to the aluminum lead terminal 2 on the positive electrode side. It is assumed that the thermal conductivity of the heat insulating material 15 corresponding to the above is set low in advance. Specifically, is the thickness dimension H in the vertical direction of the heat insulating material 15 in the portion corresponding to the negative lead terminal 3 larger than that of the heat insulating material 15 in the portion corresponding to the positive lead terminal 2? Alternatively, the material of the heat insulating material 15 corresponding to the negative lead terminal 3 is made to have a lower thermal conductivity than that of the heat insulating material 15 corresponding to the positive lead terminal 2.
  • the portions corresponding to the positive-side lead terminal 2 and the portion corresponding to the negative-side lead terminal 3 are simultaneously heat-welded by the common upper and lower heat-welding jigs 9 and 10, Since the copper used for the lead terminal 3 on the negative electrode side has higher thermal conductivity, the portion corresponding to the lead terminal 3 on the negative electrode side tends to have a lower welding temperature.
  • the negative electrode by increasing the thickness dimension of the heat insulating material 15 in the portion corresponding to the lead terminal 3 on the negative electrode side as described above or by making the thermal conductivity of the heat insulating material 15 low in advance, the negative electrode
  • the heat transfer from the portion corresponding to the lead terminal 3 on the side to the main body 11 side of the upper and lower heat welding jigs 9 and 10 can be made slow, resulting in the lead terminal 3 on the negative electrode side. It is possible to increase the welding temperature at the portion to be applied.
  • the impulse type heater 13 is used as an embodiment here, it is not limited as long as it is an apparatus that heat-welds four sides of the laminate film exterior body by heating.
  • the heat insulating material 15 should just have a heat conductivity lower than the stainless steel jig

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

Selon l'invention, une borne conductrice (2) du côté de l'électrode positive et des pellicules stratifiées (4a, 4b) supérieure et inférieure qui deviennent un corps de conditionnement (4) extérieur en pellicule stratifiée sont pressurisées et contraintes par des outils de soudage (9, 10) supérieur et inférieur et soudées thermiquement par des réchauffeurs à impulsion (13) des outils de soudage (9, 10) respectifs. Un matériau isolant à la chaleur (15) est disposé dans une partie située du côté de la surface arrière de chacun des réchauffeurs (13) et correspondant à la borne conductrice (2), empêchant ainsi la chaleur de s'échapper vers le côté d'un corps principal (11) d'outil pour maintenir une température d'une zone de soudage thermique dans la partie correspondant à la borne conductrice (2) relativement élevée. Cela permet d'obtenir une température de soudage uniforme au niveau d'une partie latérale des pellicules stratifiées (4a, 4b), à partir desquelles la borne conductrice (2) est dirigée vers l'extérieur, et évite ainsi l'occurrence d'un défaut de soudage thermique.
PCT/JP2014/058176 2013-05-23 2014-03-25 Procédé de fabrication et dispositif de fabrication d'accumulateur de type stratifié WO2014188774A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015518132A JP6019224B2 (ja) 2013-05-23 2014-03-25 ラミネート型二次電池の製造方法および製造装置

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JP2013-108479 2013-05-23
JP2013108479 2013-05-23

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CN108140759A (zh) * 2015-12-16 2018-06-08 株式会社Lg化学 带有增加的压力和热量施加面积的用于电池壳体的密封设备
KR20190082309A (ko) * 2016-12-09 2019-07-09 가부시키가이샤 인비젼 에이이에스씨 재팬 필름 외장 전지의 제조 방법 및 필름 외장 전지
JP2021082448A (ja) * 2019-11-18 2021-05-27 トヨタ自動車株式会社 電池の製造方法
JP2021114375A (ja) * 2020-01-16 2021-08-05 トヨタ自動車株式会社 ラミネート電池の製造装置
CN113224425A (zh) * 2020-02-04 2021-08-06 丰田自动车株式会社 层压电池及其制造方法
CN114430060A (zh) * 2020-10-29 2022-05-03 泰星能源解决方案有限公司 蓄电单元及其制造方法
CN114464964A (zh) * 2022-03-08 2022-05-10 东莞新能安科技有限公司 复合电极端子、电化学装置、电池模组及用电设备
EP4273983A1 (fr) * 2022-04-28 2023-11-08 Toyota Jidosha Kabushiki Kaisha Batterie, module de batterie et procédé de production de batterie

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* Cited by examiner, † Cited by third party
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CN108140759A (zh) * 2015-12-16 2018-06-08 株式会社Lg化学 带有增加的压力和热量施加面积的用于电池壳体的密封设备
KR20190082309A (ko) * 2016-12-09 2019-07-09 가부시키가이샤 인비젼 에이이에스씨 재팬 필름 외장 전지의 제조 방법 및 필름 외장 전지
CN110199403A (zh) * 2016-12-09 2019-09-03 远景Aesc日本有限公司 膜封装电池的制造方法和膜封装电池
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JP7333000B2 (ja) 2019-11-18 2023-08-24 トヨタ自動車株式会社 電池の製造方法
JP2021114375A (ja) * 2020-01-16 2021-08-05 トヨタ自動車株式会社 ラミネート電池の製造装置
JP7232408B2 (ja) 2020-01-16 2023-03-03 トヨタ自動車株式会社 ラミネート電池の製造装置
CN113224425A (zh) * 2020-02-04 2021-08-06 丰田自动车株式会社 层压电池及其制造方法
CN113224425B (zh) * 2020-02-04 2023-06-30 丰田自动车株式会社 层压电池及其制造方法
CN114430060A (zh) * 2020-10-29 2022-05-03 泰星能源解决方案有限公司 蓄电单元及其制造方法
CN114464964A (zh) * 2022-03-08 2022-05-10 东莞新能安科技有限公司 复合电极端子、电化学装置、电池模组及用电设备
EP4273983A1 (fr) * 2022-04-28 2023-11-08 Toyota Jidosha Kabushiki Kaisha Batterie, module de batterie et procédé de production de batterie

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