WO2020207231A1 - 电池 - Google Patents

电池 Download PDF

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Publication number
WO2020207231A1
WO2020207231A1 PCT/CN2020/080437 CN2020080437W WO2020207231A1 WO 2020207231 A1 WO2020207231 A1 WO 2020207231A1 CN 2020080437 W CN2020080437 W CN 2020080437W WO 2020207231 A1 WO2020207231 A1 WO 2020207231A1
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WO
WIPO (PCT)
Prior art keywords
tab
plate
assembly
electrode
pole piece
Prior art date
Application number
PCT/CN2020/080437
Other languages
English (en)
French (fr)
Inventor
杨剑雄
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to FIEP20787918.0T priority Critical patent/FI3930031T3/fi
Priority to PL20787918.0T priority patent/PL3930031T3/pl
Priority to ES20787918T priority patent/ES2934063T3/es
Priority to EP20787918.0A priority patent/EP3930031B1/en
Publication of WO2020207231A1 publication Critical patent/WO2020207231A1/zh
Priority to US17/478,886 priority patent/US11710882B2/en
Priority to US18/211,599 priority patent/US20230335873A1/en

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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
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/591—Covers
    • 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
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/143—Fireproof; Explosion-proof
    • 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
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—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
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • 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
    • 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
    • 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
    • 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
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • 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

Definitions

  • This application relates to the technical field of energy storage devices, in particular to a battery.
  • Battery short circuit is divided into internal short circuit and external short circuit.
  • internal short circuit the risk of short circuit caused by the contact between the negative electrode tab and the positive electrode sheet and the contact between the positive electrode tab and the negative electrode sheet is the highest.
  • the battery is likely to smoke, catch fire or even explode, causing safety problems.
  • This application provides a battery to solve the problems in the prior art and improve the safety of the battery.
  • the application provides a battery, including: an electrode assembly, a first tab, a second tab, a cover plate assembly, a first electrode terminal, a second electrode terminal, and a shaping plate; the electrode assembly includes a first pole piece, a second pole piece, and a shaping plate. A pole piece and a diaphragm arranged between the first pole piece and the second pole piece;
  • Both the first electrode terminal and the second electrode terminal are arranged on the cover plate assembly;
  • the first electrode terminal is connected to the first pole piece through the first tab;
  • the second electrode terminal is connected to the second pole piece through the second tab;
  • the shaping plate is arranged between the cover plate assembly and the electrode assembly, and the first tab and the second tab are respectively bent around the shaping plate;
  • the shaping plate and the cover plate assembly are hot melted and fixed.
  • the cover plate assembly includes a cover plate and an insulating plate connected to the cover plate;
  • the insulating plate is arranged between the cover plate and the shaping plate;
  • the shaping plate and the insulating plate are heat-melted and fixed.
  • the shaping plate includes a plate body and a pair of protrusions
  • a pair of extensions respectively extend from the two short sides of the board in a direction away from the board;
  • the width of the extension is smaller than the width of the short side of the board
  • a pair of protruding parts are respectively thermally fused and fixed to both ends of the insulating plate along the length direction.
  • a pair of first grooves is provided on the insulating plate, and the pair of first grooves are respectively provided at both ends of the insulating plate along the length direction, and the extension part is accommodated in the first groove.
  • the protrusion is in the shape of a rectangular plate; the first groove is a rectangular groove.
  • the protrusion is thermally fused with the bottom surface of the first groove.
  • the cover plate assembly includes a protrusion, the protrusion is disposed on the bottom surface of the first groove and protrudes from the bottom surface of the first groove;
  • the protrusion is provided with a through hole, the protrusion passes through the through hole and the end of the protrusion away from the cover plate assembly exceeds the hole wall of the through hole, so that the protrusion is fixed to the protrusion.
  • an explosion-proof valve is provided on the cover plate assembly
  • the air hole corresponding to the position of the explosion-proof valve is provided on the shaping plate;
  • the insulating plate is also provided with a pair of second grooves, the pair of second grooves are respectively arranged at two ends of the insulating plate in the width direction, and the parts of the shaping plate on both sides of the air passage hole are accommodated in the second grooves.
  • the parts on both sides of the air hole on the shaping plate are thermally fused with the bottom surface of the second groove.
  • the first tabs of at least two electrode assemblies are connected to each other, and the second tabs of at least two electrode assemblies are connected to each other;
  • the first tabs on the at least two electrode assemblies are respectively located on two sides in the width direction of the shaping plate; the second tabs on the at least two electrode assemblies are respectively located on the two sides in the width direction of the shaping plate.
  • the battery provided in this application includes an electrode assembly, a first tab, a second tab, a cover plate assembly, a first electrode terminal, a second electrode terminal, and a shaping plate.
  • the electrode assembly includes a first pole piece, a second pole piece, and a diaphragm arranged between the first pole piece and the second pole piece.
  • the shaping plate is arranged between the cover plate assembly and the electrode assembly, the first tab and the second tab are respectively bent around the shaping plate, and the shaping plate and the cover plate assembly are fixed by heat fusion.
  • the first tab and the second tab are prevented from being inserted into the electrode assembly, thereby preventing the first tab and the second tab
  • the sheet is short-circuited and the second tab is short-circuited with the first tab, which improves the safety performance of the battery.
  • FIG. 1 is an exploded schematic diagram of a battery provided by an embodiment of the application
  • FIG. 2 is another exploded schematic diagram of the battery provided by the embodiment of the application.
  • Figure 3 is a side cross-sectional view of a battery provided by an embodiment of the application.
  • FIG. 4 is a main cross-sectional view of the battery provided by the embodiment of the application, cut through at the upper part;
  • Figure 5 is an enlarged view of A in Figure 4.
  • Figure 6 is a schematic view of thermal melting decomposition of the cover plate assembly and the shaping plate
  • Figure 7 is a schematic diagram of the structure of the shaping plate
  • Figure 8 is a schematic diagram of the structure of the cover assembly
  • Figure 9 is a state diagram of the cover plate assembly and the shaping plate being hot melted and fixed together
  • Figure 10 is a partial enlarged view of Figure 9;
  • Figure 11 is a schematic diagram of a matching method of the insulating plate and the shaping plate
  • Figure 12 is a side cross-sectional view of a battery provided by an embodiment of the application.
  • Figure 13 is an enlarged view of C in Figure 12;
  • FIG. 14 is a schematic diagram of the assembly process of the battery provided by the embodiment of the application.
  • Fig. 1 is an exploded schematic diagram of the battery provided by the embodiment of the application. As shown in Fig. 1, the embodiment of the present application provides a battery including an electrode assembly 10, a first tab 20, a second tab 30, The cap plate assembly 40, the first electrode terminal 50, the second electrode terminal 60 and the shaping plate 70.
  • FIG. 2 is another exploded schematic diagram of the battery provided by the embodiment of the application.
  • the battery includes two electrode assemblies 10, two electrode assemblies 10 and a cover plate assembly 40. After the assembly is completed, it is loaded into the housing 110.
  • the battery may also include more electrode assemblies 10, and FIGS. 1 and 2 only take two electrode assemblies 10 as an example for illustration.
  • FIG. 3 is a side cross-sectional view of a battery provided by an embodiment of the application.
  • the electrode assembly 10 includes a first pole piece 11, a second pole piece 12, and a diaphragm 13, and the first pole piece 11 and the second pole piece
  • the 12 is insulated by the diaphragm 13.
  • the first pole piece 11, the second pole piece 12, and the diaphragm 13 can be wound or laminated to form an electrode assembly, and a chemical reaction occurs between the electrode assembly and the electrolyte to generate electrical energy.
  • the first pole piece 11 is used as a positive electrode piece
  • the second pole piece 12 is a negative electrode piece for illustration.
  • the first pole piece 11 can also be a negative pole piece
  • the second pole piece 12 is a positive pole piece
  • the positive active material may be coated on the coating area of the positive electrode sheet
  • the negative active material may be coated on the coating area of the negative electrode sheet.
  • the uncoated part extending from the coating area of the positive electrode sheet is used as the positive electrode tab.
  • the first tab 20 may be the positive electrode tab; the uncoated part extending from the coating area of the negative electrode sheet As a negative tab, the second tab 30 in this embodiment may be a negative tab.
  • the first pole piece 11 is electrically connected to the first electrode terminal 50 through the first lug 20, and the second pole piece 12 is electrically connected to the second electrode terminal 60 through the second lug 30, thereby outputting the generated electric energy to the outside.
  • An electrode terminal 50 and a second electrode terminal 60 are both provided on the cap plate assembly 40.
  • the first tab 20 may be formed by a plurality of uncoated portions extending from the coating area of the positive electrode sheet
  • the second tab 30 may be formed by a plurality of uncoated portions extending from the coating area of the negative electrode sheet.
  • the uncoated part is formed.
  • the first pole piece 11 of the electrode assembly 10 is connected to the first electrode terminal 50 (the first electrode terminal 50 at this time is a positive terminal) through the first tab 20.
  • the second pole piece 12 of the electrode assembly 10 is connected to the second electrode terminal 60 through the second tab 30 (the second electrode terminal 60 at this time is a negative terminal).
  • the shaping plate 70 is arranged between the cover plate assembly 40 and the electrode assembly 10.
  • the first tab 20 and the second tab 30 are respectively bent around the shaping plate 70 so that the shaping plate 70 is supported on the bent first tab 20 And the second tab 30 bent.
  • the first tab 20 and the second tab 30 need to be bent. After bending, the first tab 20 and the second tab 30 are more It is soft and has a multi-layer structure, which is prone to collapse and deformation, and short circuit with the first pole piece 11 or the second pole piece 12 occurs.
  • the first tab 20 and the second tab 30 maintain a certain bent shape to prevent the first tab 20 and the second tab 12 from short-circuiting and the second tab 30 and the first tab 11 from short-circuiting, which improves The safety performance of the battery.
  • the shaping plate 70 and the cover plate assembly 40 are thermally fixed.
  • 4 is a main cross-sectional view of the battery provided by an embodiment of the application at the upper part
  • FIG. 5 is an enlarged view of A in FIG. 4, referring to FIGS. 4 and 5,
  • the cover assembly 40 may include a cover 41 and connected to The insulating plate 42 of the cover plate 41, wherein the insulating plate 42 is arranged between the cover plate 41 and the shaping plate 70 to isolate the cover plate 41 from the conductive parts inside the housing 110, and the shaping plate 70 and the insulating plate 42 are thermally fixed.
  • the cover plate assembly 40 and the shaping plate 70 are connected by heat fusion, which simplifies the installation process of the shaping plate 70, and the shaping plate 70 and the cover plate assembly 40 are directly connected by heat fusion, which can help support
  • the first tab 20 and the second tab 30 further prevent the first tab 20 and the second tab 30 from being inserted into the electrode assembly, causing a short circuit between the first tab and the second tab 12, and the second tab with The first pole piece 11 is short-circuited.
  • the material of the insulating plate 42 may be plastic, that is, the insulating plate 42 is a plastic plate.
  • the shaping plate 70 is supported in the second tab 30 after bending, and the insulating plate 42 and the shaping plate 70 are thermally fused and fixed.
  • a fixing hole can be provided on the side of the cover plate 41 facing the insulating plate 42, and a buckle can be provided on the side of the insulating plate 42 facing the cover plate 41. The buckle extends into the fixing hole, and then the buckle part is heat-melted , Thereby achieving a fixed connection between the insulating plate 42 and the cover plate 41.
  • the shaping plate may include a plate body 71 and a pair of protrusions 72.
  • the cross section of the plate body 71 may be rectangular.
  • the pair of protrusions 72 extend from two short sides of the plate body 71 respectively.
  • 76 extends in the direction away from the plate 71, the width dimension W1 of the extension is smaller than the width dimension W2 of the short side 76 of the plate 71, and the pair of extensions 72 are respectively thermally fused with the two ends of the insulating plate 42 in the length direction fixed.
  • a pair of first grooves 422 are provided on the insulating plate 42, and the pair of first grooves 422 are respectively provided at both ends of the insulating plate 42 along the length direction, and the extension portion 72 is received in the first groove 422.
  • the first groove 422 on the insulating plate 42 to position the extension 72, the position of the shaping plate 70 on the cover plate assembly 40 can be made more precise during the process of assembling the electric core.
  • the shaping plate 70 can be supported at the most suitable position to avoid internal short circuit caused by the collapse of the tab.
  • the extension 72 is accommodated in the first groove 422, the internal space occupied by the shaping plate 70 is reduced, and the energy density of the battery is improved.
  • the above-mentioned protrusion 72 may be a rectangular plate shape, which has a simple shape and is convenient for processing.
  • the first groove 422 is a rectangular groove that matches the shape of the protrusion 72 to provide precise positioning for the protrusion 72.
  • the extension 72 is optionally thermally fused to the bottom surface of the first groove 422.
  • the first groove 422 locates the extension 72 and is also thermally fused to the extension 72, which improves the shaping plate 70. Reliability of the connection with the cover assembly 40.
  • the cover plate assembly 40 includes a protrusion 421 which is disposed on the bottom surface of the first groove 422 and protrudes from the bottom surface of the first groove 422.
  • the protrusion 72 is provided with a through hole 74, the protrusion 422 passes through the through hole 74 and the end of the protrusion 422 away from the cover plate assembly 40 extends beyond the wall of the through hole 74, so that the protrusion 72 is fixed to the protrusion 421.
  • the protrusions 421 can play a role in positioning to ensure the position accuracy of the shaping plate 10. After heat fusion, the protruding portion 72 of the shaping plate 70 is connected at the position where it matches the protrusion 421.
  • the battery provided in the embodiment of the present application further includes an explosion-proof valve 100.
  • the explosion-proof valve 100 is arranged on the cover plate assembly 40.
  • the explosion-proof valve 100 is specifically arranged on the cover of the cover plate assembly 40.
  • the plate 41 is provided with an exhaust hole 411 corresponding to the position of the explosion-proof valve 100
  • the shaping plate 70 is also provided with an air passage hole 73 corresponding to the position of the explosion-proof valve 100. Because the air hole 73 corresponds to the position of the explosion-proof valve 100, the gas generated in the battery can easily reach the explosion-proof valve 100, reducing the probability of danger.
  • a pair of second grooves 423 are also provided on the insulating plate 42.
  • a pair of second grooves 423 are respectively provided at both ends of the insulating plate 42 in the width direction.
  • the shaping plate 70 is located on both sides of the air hole 73. The part is received in the second groove 423.
  • the arrangement of the second groove 423 can limit the position of the shaping plate 70 in the width direction of the shaping plate 70, which improves the positioning accuracy of the shaping plate 70.
  • the parts of the shaping plate 70 located on both sides of the air hole 73 and the bottom surface of the second groove 423 are thermally fused.
  • the second groove 423 locates the part of the shaping plate 70 close to the long side 75 on both sides of the air hole 73, and at the same time it is fixed to the shaping plate 70 by heat fusion, which improves the connection between the shaping plate 70 and the cover assembly 40 reliability.
  • the battery provided by the embodiment of the present application further includes a first adapter piece 80 and a second adapter piece 90, and the first electrode terminal 50 is connected to the first tab 20 through the first adapter piece 80 ,
  • the second electrode terminal 60 is connected to the second tab 30 through the second adapter piece 90.
  • they can be bent and wound on both sides of the shaping plate 70.
  • the bent first tabs 20 pass through the first adapter plate 80.
  • the bent second tab 30 is connected to the second electrode terminal 60 through the second adapter piece 90, which achieves the effect of improving the order of the internal components of the battery.
  • FIG. 12 is a side sectional view of the battery provided by an embodiment of the application
  • FIG. 13 is an enlarged view of C in FIG. 12.
  • the two electrode assemblies 10 are both connected to the first tab 20 and the first tab.
  • the second tab 30, the first tab 20 and the second tab 30 bent on the two electrode assemblies 10 are all supported by the same shaping plate 70.
  • the first tabs 20 on the two electrode assemblies 10 are located on both sides of the shaping plate 70 in the width direction
  • the second tabs 30 on the two electrode assemblies 10 are located on both sides of the shaping plate 70 in the width direction. In this way, the two electrode assemblies 10 share the same shaping plate 70 without using too many components, reducing the overall size of the battery and not occupying too much space.
  • FIG. 14 is a schematic diagram of the assembly process of the battery provided by the embodiment of the application.
  • the two electrode assemblies 10 are first laid flat and placed opposite each other.
  • the two electrode assemblies 10 The tabs are opposite.
  • FIG. 11 takes the position of the first tab 20 as an example for description. It can be understood that the assembly method implemented on the side where the second tab 30 is located is the same as the side where the first tab 20 is located.
  • the first adapter piece 80 is welded on the first tab 20 (in FIG.
  • the first adapter piece 80 is located below the first tab 20, and the second The same method is used on the side where the adapter piece 90 is located), then the cover plate assembly 40 is moved, the first electrode terminal 50 on the cover plate assembly 40 and the first adapter piece 80 are welded and fixed, and then the shaping plate 70 and the cover The insulating plate 42 of the plate assembly 40 is heat-melted and fixed, and finally the two electrode assemblies 10 are turned over to bend the first tab 20 and the second tab 30.
  • first tab 20 and the second tab 30 on the two electrode assemblies 10 wind the shaping plate 70, and the shaping plate 70 is supported in the first tab 20 and the second tab 30 after bending, avoiding
  • the first tab 20 and the second tab 30 are inserted into the electrode assembly 10, resulting in a short circuit with the second tab 30 and the first tab 11, and the short circuit between the first tab 20 and the second tab 12, thereby improving Improve the safety performance of the battery.

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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)
  • Connection Of Batteries Or Terminals (AREA)
  • Primary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

一种电池，涉及储能器件领域，该电池包括：电极组件（10）、第一极耳（20）、第二极耳（30）、盖板组件（40）、第一电极端子（50）、第二电极端子（60）和整形板（70）；电极组件（10）包括第一极片（11）、第二极片（12）以及设置于第一极片（11）和第二极片（12）之间的隔膜（13）；第一电极端子（50）和第二电极端子（60）均设置在盖板组件（40）上；第一电极端子（50）通过第一极耳（20）与第一极片（11）连接；第二电极端子（60）通过第二极耳（30）与第二极片（12）连接；整形板（70）设置在盖板组件（40）与电极组件（10）之间，第一极耳（20）和第二极耳（30）绕着整形板（70）弯折；整形板（70）与盖板组件（40）热熔固定。将整形板（70）支撑在弯折的第一极耳（20）和弯折的第二极耳（20）中，避免了第一极耳（20）和第二极耳（30）插入到电极组件（10）内部，从而防止第一极耳（20）与第二极片（12）短路、第二极耳（30）与第一极片（11）短路，提高了电池的安全性能。

Description

电池
相关申请的交叉引用
本申请要求享有于2019年04月08日提交的名称为“电池”的中国专利申请第201920461233.X号的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及储能器件技术领域，尤其涉及一种电池。
背景技术
随着电动汽车技术的日益完善，电动汽车离人们的生活越来越近，同时电动汽车对其提供能量的电池的性能要求越来越高。
电池在使用过程中，需要防止电池短路。电池短路分为内短路和外短路两种。在内短路中，负极极耳与正极片以及正极极耳与负极片接触造成短路的风险最高。
上述内短路发生后，电池容易冒烟起火甚至爆炸，造成安全问题。
申请内容
本申请提供了一种电池，以解决现有技术中的问题，提高电池的安全性。
本申请提供了一种电池，包括：电极组件、第一极耳、第二极耳、盖板组件、第一电极端子、第二电极端子和整形板；电极组件包括第一极片、第二极片以及设置于第一极片和第二极片之间的隔膜；
第一电极端子和第二电极端子均设置在盖板组件上；
第一电极端子通过第一极耳与第一极片连接；
第二电极端子通过第二极耳与第二极片连接；
整形板设置在盖板组件与电极组件之间，第一极耳和第二极耳分别绕着整形板弯折；
整形板与盖板组件热熔固定。
根据本申请的一个方面，盖板组件包括盖板和连接于盖板的绝缘板；
绝缘板设置在盖板与整形板之间；
整形板与绝缘板热熔固定。
根据本申请的一个方面，整形板包括板体和一对伸出部；
一对伸出部分别从板体的两个短边向远离板体的方向伸出；
伸出部的宽度尺寸小于板体的短边的宽度尺寸；
一对伸出部分别与绝缘板沿长度方向的两端热熔固定。
根据本申请的一个方面，绝缘板上设置有一对第一凹槽，一对第一凹槽分别设置在绝缘板沿长度方向的两端，且伸出部容纳于第一凹槽内。
根据本申请的一个方面，伸出部为矩形板状；第一凹槽为矩形凹槽。
根据本申请的一个方面，伸出部与第一凹槽的底面热熔。
根据本申请的一个方面，盖板组件包括凸起，凸起设置在第一凹槽的底面且凸出于第一凹槽的底面；
伸出部设有通孔，凸起穿过通孔且凸起的远离盖板组件的一端超出通孔的孔壁，以使伸出部固定于凸起。
根据本申请的一个方面，盖板组件上设置有防爆阀；
整形板上设置有与防爆阀位置对应的过气孔；
绝缘板上还设置有一对第二凹槽，一对第二凹槽分别设置在绝缘板沿宽度方向的两端，整形板上位于过气孔两侧的部分容纳于第二凹槽内。
根据本申请的一个方面，整形板上位于过气孔两侧的部分与第二凹槽的底面热熔。
根据本申请的一个方面，电极组件至少为两个；
至少两个的电极组件的第一极耳相互连接，至少两个的电极组件的第二极耳相互连接；
至少两个的电极组件上的第一极耳分别位于整形板宽度方向的两侧；至少两个的电极组件上的第二极耳分别位于整形板宽度方向的两侧。
本申请提供的技术方案可以达到以下有益效果：
本申请提供的电池包括电极组件、第一极耳、第二极耳、盖板组件、第一电极端子、第二电极端子和整形板。电极组件包括第一极片、第二极片以及设置于第一极片和所述第二极片之间的隔膜。整形板设置在盖板组件与电极组件之间，第一极耳和第二极耳分别绕着整形板弯折，整形板与盖板组件热熔固定。通过将整形板支撑在弯折的第一极耳和弯折的第二极耳中，避免了第一极耳和第二极耳插入到电极组件内部，从而防止第一极耳与第二极片发生短路以及第二极耳与第一极片发生短路，提高了电池的安全性能。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
为了更清楚地说明本申请具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例所提供的电池的一种分解示意图；
图2为本申请实施例所提供的电池的另一种分解示意图；
图3为本申请实施例所提供的电池的侧剖视图；
图4为本申请实施例所提供的电池在上部剖开的主剖视图；
图5为图4中的A处放大图；
图6为盖板组件与整形板的热熔分解示意图；
图7为整形板的结构示意图；
图8为盖板组件的结构示意图；
图9为盖板组件与整形板热熔固定在一起的状态图；
图10为图9的局部放大图；
图11为绝缘板与整形板的一种配合方式的示意图；
图12为本申请实施例所提供的电池的侧剖视图；
图13为图12中的C处放大图；
图14为本申请实施例所提供的电池的装配过程示意图。
附图标记：
10-电极组件；
11-第一极片；
12-第二极片；
13-隔膜；
20-第一极耳；
30-第二极耳；
40-盖板组件；
41-盖板；
411-排气孔；
42-绝缘板；
421-凸起；
422-第一凹槽；
423-第二凹槽；
50-第一电极端子；
60-第二电极端子；
70-整形板；
71-板体；
72-伸出部；
73-过气孔；
74-通孔；
75-长边；
76-短边；
80-第一转接片；
90-第二转接片；
100-防爆阀；
110-壳体。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
下面将结合附图对本申请的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
图1为本申请实施例所提供的电池的一种分解示意图，如图1所示，本申请实施例提供了一种电池，包括电极组件10、第一极耳20、第二极耳30、盖板组件40、第一电极端子50、第二电极端子60和整形板70。
图2为本申请实施例所提供的电池的另一种分解示意图，图1和图2所示的实施例中，电池包括两个电极组件10，两个电极组件10与盖板组件40等部件完成装配后装入到壳体110中。当然，电池还可以包括更多的电极组件10，图1和图2仅是以两个电极组件10为例进行说明。
图3为本申请实施例所提供的电池的侧剖视图，如图3所示，电极组件10包括第一极片11、第二极片12和隔膜13，第一极片11和第二极片12之间通过隔膜13绝缘。第一极片11、第二极片12和隔膜13可以通过卷绕或层叠的方式形成电极组件，电极组件与电解液之间发生化学反应产生电能。在本实施例中，示例性地以第一极片11为正极片，第二极片12为负极片进行说明。在其他的实施例中，第一极片11还可以为负极片，而第二极片12为正极片。另外，正极活性物质可被涂覆在正极片的涂覆区上，而负极活性物质可被涂覆到负极片的涂覆区上。由正极片的涂覆区延伸出的未涂覆部分则作为正极极耳，本实施例中的第一极耳20可以是正极极耳；由负极片的涂覆区延伸出的未涂覆部分则作为负极极耳，本实施例中的第二极耳30可以是负极极耳。第一极片11通过第一极耳20电连接至第一电极端子50，第二极片12通过第二极耳30电连接至第二电极端子60，从而将产生的电能向外部输出，第一电极端子50和第二电极端子 60均设置在盖板组件40上。
如图3所示，第一极耳20可以由多个从正极片的涂覆区延伸出的未涂覆部分形成，第二极耳30可以由多个从负极片的涂覆区延伸出的未涂覆部分形成。电极组件10的第一极片11通过第一极耳20与第一电极端子50(此时的第一电极端子50为正极端子)连接。电极组件10的第二极片12则通过第二极耳30与第二电极端子60连接(此时的第二电极端子60为负极端子)。
整形板70设置在盖板组件40与电极组件10之间，第一极耳20和第二极耳30分别绕着整形板70弯折，使整形板70支撑在弯折的第一极耳20和弯折的第二极耳30中。在将电极组件10装入到壳体110的工序之前，需要对第一极耳20和第二极耳30进行折弯处理，折弯后，由于第一极耳20和第二极耳30较软且为多层结构，容易发生塌陷变形，发生与第一极片11或第二极片12短路的现象。通过将整形板70支撑在弯折的第一极耳20和弯折的第二极耳30中，避免了第一极耳20和第二极耳30不受约束而插入到电极组件10的内部，第一极耳20和第二极耳30保持一定的弯折形状，防止第一极耳20与第二极片12发生短路以及第二极耳30与第一极片11发生短路，提高了电池的安全性能。
本实施例中，整形板70与盖板组件40热熔固定。图4为本申请实施例所提供的电池在上部剖开的主剖视图，图5为图4中的A处放大图，参照图4和图5，盖板组件40可以包括盖板41和连接于盖板41的绝缘板42，其中绝缘板42设置在盖板41与整形板70之间，以将盖板41与壳体110内部的导电部件隔离，整形板70与绝缘板42热熔固定。
盖板组件40与整形板70之间通过热熔的方式连接，简化了整形板70的安装过程，而且整形板70与盖板组件40之间通过热熔的方式直接相连，能够有助于支撑第一极耳20和第二极耳30，进一步避免了第一极耳20和第二极耳30插入到电极组件内部，发生第一极耳与第二极片12短路、第二极耳与第一极片11短路的现象。
绝缘板42的材质可以是塑胶，即，绝缘板42为塑胶板。如图5所示，整形板70支撑在弯折后的第二极耳30中，绝缘板42与整形板70热 熔固定。在盖板41朝向绝缘板42的一侧可以设置有固定孔，绝缘板42朝向盖板41的一侧可以设置有卡扣，卡扣伸入到固定孔中，再将卡扣部位进行热熔，从而实现绝缘板42与盖板41之间的固定连接。
如图6和图7所示，整形板可以包括板体71和一对伸出部72，板体71的横断面可以为长方形，一对伸出部72分别从板体71的两个短边76向远离板体71的方向伸出，伸出部的宽度尺寸W1小于板体71的短边76的宽度尺寸W2，一对伸出部72分别与绝缘板42沿长度方向的两端热熔固定。
可选的，如图8至图10所示，绝缘板42上设置有一对第一凹槽422，一对第一凹槽422分别设置在绝缘板42沿长度方向的两端，且伸出部72容纳于该第一凹槽422内。通过在绝缘板42设置第一凹槽422来对伸出部72进行定位，在电芯装配的过程中，能够使整形板70在盖板组件40上的位置更精准，在弯折极耳后，整形板70能支撑在最合适的位置，以避免极耳塌陷造成的内短路。而且，由于伸出部72容纳于第一凹槽422，减小了整形板70占用的内部空间，提高了电池的能量密度。
上述伸出部72可以是矩形板状，其形状简单，方便加工。相应地，第一凹槽422为矩形凹槽，与伸出部72的形状相匹配，以对伸出部72提供精准的定位。伸出部72可选的与第一凹槽422的底面热熔固定，第一凹槽422在对伸出部72进行定位的同时，还与伸出部72热熔固定，提高了整形板70与盖板组件40的连接可靠性。
作为一种优选的实现方式，参照图11，盖板组件40包括凸起421，凸起421设置在第一凹槽422的底面且凸出于第一凹槽422的底面。伸出部72设有通孔74，凸起422穿过通孔74且凸起422的远离盖板组件40的一端超出通孔74的孔壁，以使伸出部72固定于凸起421。在整形板10与盖板组件40装配时，凸起421能起到定位的作用，保证整形板10的位置精度。热熔后，整形板70的伸出部72在与凸起421配合的位置相连接。
如图1和图6所示，由于电池内装有大量化学物质，如电解质，在充放电过程中会产生大量混合气体和液体等，伴随而来的还有不断积聚的压 力，因此为防止电池内容易压力过大而发生爆炸，可选的，本申请实施例所提供的电池还包括防爆阀100，防爆阀100设置在盖板组件40上，防爆阀100具体地设置在盖板组件40的盖板41上，相应地，盖板41上设置有排气孔411，与防爆阀100的位置对应，整形板70上也设置有与防爆阀100的位置相对应的过气孔73。因过气孔73与防爆阀100位置相对应，使得电池内产生的气体可以很容易的到达防爆阀100处，降低了发生危险的几率。
如图8所示，绝缘板42上还设置有一对第二凹槽423，一对第二凹槽423分别设置在绝缘板42沿宽度方向的两端，整形板70上位于过气孔73两侧的部分容纳于该第二凹槽423内。第二凹槽423的设置能够在整形板70的宽度方向上对整形板70进行限位，提高了整形板70的定位准确性。
可选的，整形板70上位于过气孔73两侧的部分与该第二凹槽423的底面热熔。第二凹槽423在对整形板70上位于过气孔73两侧的靠近长边75的部分进行定位的同时，还与整形板70热熔固定，提高了整形板70与盖板组件40的连接可靠性。
进一步地，参照图1，本申请实施例所提供的电池还包括第一转接片80和第二转接片90，第一电极端子50通过第一转接片80与第一极耳20连接，第二电极端子60通过第二转接片90与第二极耳30连接。例如，电极组件10、第一极耳20以及第二极耳30均至少为两个，每个电极组件10均连接有第一极耳20以及第二极耳30。当第一极耳20以及第二极耳30均至少为两个时，其可以弯折缠绕在整形板70的两侧，例如，弯折后的第一极耳20通过第一转接片80与第一电极端子50连接。弯折后的第二极耳30通过第二转接片90与第二电极端子60连接，实现了提高电池内部组件有序性的效果。
上文已提及，电极组件10可以至少为两个。图12为本申请实施例所提供的电池的侧剖视图，图13为图12中的C处放大图，如图12和图13所示，两个电极组件10均连接第一极耳20和第二极耳30，两个电极组件10上弯折后的第一极耳20和第二极耳30，均通过同一整形板70支撑。两个电极组件10上的第一极耳20分别位于整形板70宽度方向的两侧，两个 电极组件10上的第二极耳30分别位于整形板70宽度方向的两侧。这样，两个电极组件10共用一个整形板70，而不必使用过多的部件，减少了电池的整体尺寸，不会占据过大的空间。
图14为本申请实施例所提供的电池的装配过程示意图，如图14所示，在对电极组件10装配时，首先将两个电极组件10平躺并相对设置，此时两个电极组件10的极耳相对。图11以示出第一极耳20所在的位置为例进行说明，可以理解的是，第二极耳30所在的一侧，实施的装配方法与第一极耳20所在侧相同。将两个电极组件10平躺且相对设置后，将第一转接片80焊接在第一极耳20上(图14中，第一转接片80位于第一极耳20的下方，第二转接片90所在的一侧采用同样的方法)，再移动盖板组件40，将盖板组件40上的第一电极端子50与第一转接片80焊接固定，之后将整形板70与盖板组件40的绝缘板42热熔固定，最后翻转两个电极组件10，使第一极耳20和第二极耳30弯折。这样，两个电极组件10上的第一极耳20和第二极耳30将整形板70缠绕，整形板70支撑在弯折后的第一极耳20和第二极耳30中，避免了第一极耳20和第二极耳30插入电极组件10内，造成的与第二极耳30与第一极片11短路、第一极耳20与第二极片12短路的现象，从而提高了电池的安全性能。
以上仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种电池，包括：电极组件、第一极耳、第二极耳、盖板组件、第一电极端子、第二电极端子和整形板；
    所述电极组件包括第一极片、第二极片以及设置于所述第一极片和所述第二极片之间的隔膜；
    所述第一电极端子和所述第二电极端子均设置在所述盖板组件上；
    所述第一电极端子通过所述第一极耳与所述第一极片连接；
    所述第二电极端子通过所述第二极耳与所述第二极片连接；
    所述整形板设置在所述盖板组件与所述电极组件之间，所述第一极耳和所述第二极耳分别绕着所述整形板弯折；
    所述整形板与所述盖板组件热熔固定。
  2. 根据权利要求1所述的电池，其中，所述盖板组件包括盖板和连接于所述盖板的绝缘板；
    所述绝缘板设置在所述盖板与所述整形板之间；
    所述整形板与所述绝缘板热熔固定。
  3. 根据权利要求2所述的电池，其中，所述整形板包括板体和一对伸出部；
    所述一对伸出部分别从所述板体的两个短边向远离所述板体的方向伸出；
    所述伸出部的宽度尺寸小于所述板体的所述短边的宽度尺寸，
    所述一对伸出部分别与所述绝缘板沿长度方向的两端热熔固定。
  4. 根据权利要求3所述的电池，其中，所述绝缘板上设置有一对第一凹槽，所述一对第一凹槽分别设置在所述绝缘板沿所述长度方向的两端，且所述伸出部容纳于所述第一凹槽内。
  5. 根据权利要求4所述的电池，其中，所述伸出部为矩形板状；所述第一凹槽为矩形凹槽。
  6. 根据权利要求4或5所述的电池，其中，所述伸出部与所述第一凹槽的底面热熔。
  7. 根据权利要求4或5所述的电池，其中，所述盖板组件包括凸起，所述凸起设置在所述第一凹槽的底面且凸出于所述第一凹槽的底面；
    所述伸出部设有通孔，所述凸起穿过所述通孔且所述凸起的远离所述盖板组件的一端超出所述通孔的孔壁，以使所述伸出部固定于所述凸起。
  8. 根据权利要求4或5所述的电池，其中，所述盖板组件上设置有防爆阀；
    所述整形板上设置有与所述防爆阀位置对应的过气孔；
    所述绝缘板上还设置有一对第二凹槽，所述一对第二凹槽分别设置在所述绝缘板沿宽度方向的两端，所述整形板上位于所述过气孔两侧的部分容纳于所述第二凹槽内。
  9. 根据权利要求8所述的电池，其中，所述整形板上位于所述过气孔两侧的部分与所述第二凹槽的底面热熔。
  10. 根据权利要求1-9任一项所述的电池，其中，所述电极组件至少为两个；
    至少两个的所述电极组件的所述第一极耳相互连接，至少两个的所述电极组件的所述第二极耳相互连接；
    至少两个的所述电极组件上的所述第一极耳分别位于所述整形板宽度方向的两侧；至少两个的所述电极组件上的所述第二极耳分别位于所述整形板宽度方向的两侧。
PCT/CN2020/080437 2019-04-08 2020-03-20 电池 WO2020207231A1 (zh)

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