WO2023284821A1 - 连接件、电池单体和电池包 - Google Patents

连接件、电池单体和电池包 Download PDF

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Publication number
WO2023284821A1
WO2023284821A1 PCT/CN2022/105675 CN2022105675W WO2023284821A1 WO 2023284821 A1 WO2023284821 A1 WO 2023284821A1 CN 2022105675 W CN2022105675 W CN 2022105675W WO 2023284821 A1 WO2023284821 A1 WO 2023284821A1
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WO
WIPO (PCT)
Prior art keywords
protrusion
protrusions
connecting plate
section
connector according
Prior art date
Application number
PCT/CN2022/105675
Other languages
English (en)
French (fr)
Inventor
周龙
吴聪苗
郭敏
蓝金花
Original Assignee
厦门海辰储能科技股份有限公司
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
Priority claimed from CN202121603793.8U external-priority patent/CN217691562U/zh
Priority claimed from CN202121602695.2U external-priority patent/CN217691557U/zh
Priority claimed from CN202110803671.1A external-priority patent/CN113422173A/zh
Priority claimed from CN202121602817.8U external-priority patent/CN217691558U/zh
Priority claimed from CN202110798364.9A external-priority patent/CN113422171A/zh
Priority claimed from CN202110798365.3A external-priority patent/CN113422172A/zh
Priority claimed from CN202121603554.2U external-priority patent/CN217691561U/zh
Priority claimed from CN202110798109.4A external-priority patent/CN113422167A/zh
Application filed by 厦门海辰储能科技股份有限公司 filed Critical 厦门海辰储能科技股份有限公司
Priority to EP22841454.6A priority Critical patent/EP4336647A1/en
Publication of WO2023284821A1 publication Critical patent/WO2023284821A1/zh
Priority to US18/533,209 priority patent/US20240113400A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/045—Cells or batteries with folded plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • 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
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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 invention relates to the technical field of batteries, in particular to a connector, a battery cell and a battery pack.
  • the single-layer tab is welded with copper foil on both sides of the composite tab by means of ultrasonic roll welding, and the welded copper foil is welded on the soft connection.
  • each layer of tabs needs to be welded, thus increasing the welding cost and the material cost of the copper foil.
  • the present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention proposes a connector, a battery cell and a battery pack.
  • the connector is ingeniously designed and can reduce the difficulty of welding the tabs.
  • the invention also proposes a battery cell.
  • the invention also provides a battery pack.
  • the connecting piece is used to electrically connect the multi-layer tabs of the pole pieces, and the connecting piece includes: a connecting plate and a protrusion provided on the connecting plate, and the protrusion protrudes from On one side surface of the connecting plate in the thickness direction, the protrusion passes through multiple layers of the tabs.
  • the above-mentioned connecting piece is provided with a protrusion on the connecting piece, so that the connecting piece is easy to connect with the tab, which reduces the difficulty of welding the tab, simplifies the welding process of the worker, reduces the man-hours of production, reduces the labor cost, and improves the quality of the tab.
  • the connection strength and the connection between the connector are stable, which ensures the reliability of the battery cell.
  • the connecting plate has a plurality of the protrusions, the plurality of the protrusions are arranged at intervals on the connecting plate, and the plurality of the protrusions pass through the multiple layers of the poles. Ear.
  • the connecting plate is integrally formed with a plurality of the protrusions.
  • the plurality of protrusions are welded, bonded, plugged, or clamped on the connecting plate.
  • the connecting piece further includes: a protruding plate, the protruding plate is fixed on the connecting plate, and a plurality of the protrusions are provided on a part of the protruding plate that is away from the connecting plate. side.
  • a plurality of the protrusions are arranged in a matrix on the one side surface of the connecting plate.
  • the protrusion extends along a straight line and/or a curve on the surface of the connecting plate.
  • the width of the protrusion is in the range of 0.1mm-3mm.
  • cross section of the protrusion perpendicular to the protrusion height is circular, elliptical or polygonal.
  • the height of the protrusion protruding from the connecting plate ranges from 0.1mm to 3mm.
  • the connecting plate and the protrusion are made of the same material.
  • an end of the protrusion away from the connecting plate is formed as a piercing end, and the piercing end is configured to be suitable for piercing the multi-layer tab.
  • the connecting piece of the present invention by providing a protrusion with a piercing end on the connecting piece, the piercing end is easy to pierce through the multi-layered tab, and the welding energy is easy to penetrate the connecting piece and the multi-layered tab, reducing the difficulty of welding the tab.
  • the welding process of the workers is simplified, the man-hours are reduced, the labor cost is reduced, the connection strength between the tab and the connector is improved, the connection is stable, and the reliability of the battery cell is guaranteed.
  • the protrusion is formed as a conical protrusion with an apex angle greater than 5° and less than 150°.
  • the protrusion is formed as a truncated conical protrusion, and the ratio between the radius of the top surface and the radius of the bottom surface of the truncated conical protrusion is not greater than 0.6.
  • the protrusion extends along a straight line and/or a curve on the surface of the connecting plate.
  • the section of the protrusion perpendicular to the extending direction is formed into a triangle, and in the section, the angle of the piercing end is not greater than 120°.
  • the section of the protrusion perpendicular to the extension direction is trapezoidal, and the ratio of the upper base to the lower base of the section is not greater than 0.6.
  • the protrusion includes a connecting section connected in the height direction of the protrusion and a piercing section, the connecting section is connected with the connecting plate, and the piercing section is connected at a distance from the connecting section.
  • the height of the protrusion is no greater than 5 mm.
  • the height of the piercing section is not greater than 2 mm.
  • the cross-sectional area of the piercing section decreases gradually, and the apex angle of the piercing section is not greater than 120°.
  • the connecting section transitions smoothly with the piercing section.
  • the connecting plate has a plurality of the protrusions, the plurality of the protrusions are arranged at intervals on the connecting plate, and the plurality of the protrusions pass through the multiple layers of the poles.
  • the free end surface of the protrusion is formed as a plane.
  • the connecting piece of the present invention by providing a protrusion with a flat top end surface on the connecting piece, the protrusion is easy to pierce through the multi-layer tab, the welding energy is easy to penetrate the connecting piece and the multi-layer tab, and the welding of the tab is reduced. Difficulty, simplifies the welding process of workers, reduces man-hours, reduces labor costs, improves the connection strength between tabs and connectors, ensures the reliability of battery cells, reduces the failure rate, and improves battery life.
  • the safety factor of the whole body ensures the safety of the battery cell, avoids potential safety hazards, and reduces the occurrence of dangerous accidents.
  • the cross-sectional areas of the protrusions are the same.
  • the cross-sectional area of the protrusion is no greater than 5 mm 2 .
  • the cross-sectional shape of the protrusion perpendicular to the protrusion height is circular, elliptical or polygonal.
  • the ratio of the cross-sectional area of the protrusion to the height of the protrusion is no greater than 5.
  • the cross-sectional shape of the protrusion is formed as a circle, and the radius of the protrusion is not greater than 3mm.
  • the cross-sectional shape of the protrusion is formed as a square, and the side length of the cross-section of the protrusion is not greater than 3 mm.
  • the ratio between the side length of the section of the protrusion and the height of the protrusion is not greater than 1.
  • the connecting piece is used to connect with multi-layer tabs by ultrasonic welding, the connecting plate has a plurality of protrusions, and the plurality of protrusions pass through the multi-layer lugs.
  • the density of the plurality of protrusions arranged in the ultrasonic vibration direction is greater than that in other directions except the ultrasonic vibration direction.
  • the connecting piece of the present invention by arranging on the connecting piece a plurality of protrusions arranged in the direction of ultrasonic vibration that are denser than those in other directions except the direction of ultrasonic vibration, the distance between the tab and the connecting piece is improved.
  • the welding speed reduces the manufacturing man-hours, reduces the production cost of battery cells, and improves the production efficiency of battery packs.
  • the distance between two adjacent protrusions in the ultrasonic vibration direction is L1
  • the distance between two adjacent protrusions perpendicular to the ultrasonic vibration direction is L2
  • L1 and L2 satisfy: 0.5mm ⁇ L1 ⁇ 10mm, 0.5mm ⁇ L2 ⁇ 10mm, and L1 ⁇ L2.
  • the plurality of protrusions extend along the ultrasonic vibration direction on the surface of the connecting plate and are arranged at intervals in a direction perpendicular to the ultrasonic vibration.
  • the distance L2 between two adjacent protrusions is not less than the width d of the protrusions.
  • the length of the protrusion in the ultrasonic vibration direction is L
  • the width of the protrusion perpendicular to the ultrasonic vibration direction is d
  • L and d satisfy: L*2+d*2 ⁇ X/4
  • X is the width of the tab.
  • the battery cell according to the fifth aspect of the present invention includes: a pole piece, the pole piece includes a plurality of tabs and a current collector, and the plurality of tabs are stacked; a conductive connection component, the conductive connection component includes the above-mentioned first In one aspect of the connector, the plurality of protrusions of the connector pass through multiple layers of the tabs and are electrically connected to the tabs.
  • the battery cell of the present invention by applying the conductive connection assembly provided with the connector of the first aspect to the battery cell, the difficulty of assembling the battery cell is reduced, the manufacturing hours of the battery cell are reduced, and the labor force is reduced. The cost ensures the reliability of the battery cell.
  • the pole piece includes: a supporting insulating layer and a first conductive layer and a second conductive layer respectively covering the surfaces on both sides of the supporting insulating layer in the thickness direction.
  • a battery pack according to a sixth aspect of the present invention includes the above-mentioned battery cell in the fifth aspect.
  • the safety performance of the battery pack is improved, the reliability of the battery pack is ensured, and dangers are avoided by arranging the battery cells of the fifth aspect above.
  • FIG. 1 is a schematic diagram of a conductive connection assembly according to an embodiment of the first aspect of the present invention
  • Figure 2 is a schematic diagram of a side view of the conductive connection assembly shown in Figure 1;
  • Fig. 3 is a schematic diagram of the connector shown in Fig. 1;
  • Figure 4 is a schematic illustration of a side view of the connector shown in Figure 3;
  • Fig. 5 is a partially enlarged view of the protrusion shown in Fig. 4;
  • Fig. 6 is the schematic diagram of the connector of another embodiment shown in Fig. 1;
  • Fig. 7 is a schematic diagram of another embodiment of the connector shown in Fig. 1;
  • Fig. 8 is a schematic diagram of the connector shown in Fig. 1, wherein the protrusion is formed as a cone;
  • Figure 9 is a schematic illustration of a side view of the connector shown in Figure 8.
  • Fig. 10 is a schematic diagram of another embodiment of the connector shown in Fig. 1;
  • Figure 11 is a schematic diagram of a side view of the connector shown in Figure 10;
  • Fig. 12 is a schematic diagram of the connector shown in Fig. 1, wherein the protrusion includes a connecting segment and a piercing segment;
  • Figure 13 is a schematic illustration of a side view of the connector shown in Figure 12;
  • Fig. 14 is a schematic diagram of the connector shown in Fig. 1, wherein the protrusion is formed as a pyramid;
  • Figure 15 is a schematic illustration of a side view of the connector shown in Figure 14;
  • Fig. 16 is a schematic diagram of a connector of a specific embodiment shown in Fig. 1;
  • Figure 17 is a schematic illustration of a side view of the connector shown in Figure 16;
  • FIG. 18 is a schematic illustration of a side view of the conductive connection assembly shown in FIG. 16;
  • Fig. 19 is a schematic diagram of a battery cell according to an embodiment of the fifth aspect of the present invention.
  • Figure 20 is a schematic diagram of the connector shown in Figure 19;
  • Figure 21 is a schematic diagram of a top view of the connector shown in Figure 20;
  • Figure 22 is a schematic diagram of a battery cell in another embodiment
  • Figure 23 is a schematic diagram of the connector shown in Figure 22;
  • Figure 24 is a schematic diagram of a top view of the connector shown in Figure 23;
  • 25 is a schematic diagram of a battery cell in yet another embodiment
  • Figure 26 is a schematic diagram of the connector shown in Figure 25;
  • Figure 27 is a schematic diagram of a top view of the connector shown in Figure 26;
  • Fig. 28 is a schematic diagram of a current collector.
  • connection assembly 100 Conductive connection assembly 100, connector 101, connection plate 1011,
  • a battery cell 1000 according to an embodiment of the fifth aspect of the present invention is briefly described with reference to FIGS. 1-28 , and the battery cell 1000 includes a connector 101 according to an embodiment of the present invention.
  • the battery cell 1000 includes: a pole piece 2021 and a conductive connection assembly 100 .
  • the battery cell 1000 includes: a pole piece 2021 and a conductive connection assembly 100, the pole piece 2021 includes a plurality of tabs 20211 and a current collector 202, and a plurality of tabs 20211 are stacked to conduct electricity.
  • the connecting assembly 100 includes a connecting piece 101 according to an embodiment of the present invention, and the connecting piece 101 includes a connecting plate 1011 and a protrusion 1012 disposed on the connecting plate 1011 .
  • the protrusion 1012 passes through the multi-layer tab 20211 and is electrically connected to the tab 20211 .
  • the battery cell 1000 has a pole piece 2021 and a conductive connection assembly 100
  • the pole piece 2021 has a current collector 202 and a plurality of tabs 20211
  • the conductive connection assembly 100 has a connector 101
  • the connector 101 is provided by the embodiment of the present invention.
  • the connecting piece 101 described above, the connecting piece 101 includes a connecting plate 1011 and a protrusion 1012, and the protrusion 1012 is located on the connecting plate 1011. Therefore, the structure of the battery cell 1000 is simple, the connection method between the tab 20211 and the connector 101 is simple, and the connection stability is good.
  • a plurality of tabs 20211 may refer to two tabs 20211 or more than two tabs 20211 .
  • the battery cell 1000 may include at least two pole pieces 2021 , one of which is a positive pole piece and the other is a negative pole piece.
  • the multiple tabs 20211 that are stacked can be formed by winding one pole piece plate and stacking multiple pole tabs 20211 on the pole piece plate, or by stacking multiple pole piece plates and making each The tabs 20211 on the pole sheet are aligned, and finally a plurality of tabs 20211 stacked are formed.
  • the pole piece 2021 includes: a supporting insulating layer 202113 and a first conductive layer 202111 and a second conductive layer 202112 respectively covering the surfaces on both sides of the supporting insulating layer 202113 in the thickness direction.
  • the supporting insulating layer 202113 is located between the first conductive layer 202111 and the second conductive layer 202112, and the first conductive layer 202111 and the second conductive layer 202112 respectively cover the upper surface and the lower surface of the supporting insulating layer 202113 .
  • the supporting insulating layer 202113 can be a polymer layer.
  • the ultrasonic wave cannot be transmitted to the multi-layer tab 20211 at the bottom. Insufficient friction will lead to false welding and unreliable welding.
  • the friction force during welding can be increased, and the phenomenon of unreliable welding caused by false welding can be improved.
  • the connecting piece 101 according to the embodiment of the first aspect of the present invention will be described below with reference to FIGS. 1-28 .
  • the connecting piece 101 includes: a connecting plate 1011 and a protrusion 1012 .
  • the connecting piece 101 is used to electrically connect the multi-layer tabs 20211 of the pole piece 2021, the connecting piece 101 includes: a connecting plate 1011 and a protrusion 1012 provided on the connecting plate 1011, the protrusion 1012 protrudes from the connecting plate 1011 On one side surface in the thickness direction, the connecting plate 1011 has a plurality of protrusions 1012 arranged at intervals on the connecting plate 1011 , and the plurality of protrusions 1012 pass through the multi-layer tabs 20211 .
  • the multi-layer tab 20211 of the pole piece 2021 is electrically connected through the connector 101, the connector 101 has a connecting plate 1011 and a plurality of protrusions 1012, the multi-layer tab 20211 is passed through by the plurality of protrusions 1012, and A plurality of protrusions 1012 are disposed at intervals on one surface of the connecting plate 1011 in the thickness direction, and a plurality of protrusions 1012 protrude toward a direction away from the connecting plate 1011 .
  • the connecting plate 1011 is formed into a plate shape extending horizontally, a plurality of protrusions 1012 are arranged on the upper surface of the connecting plate 1011, and the plurality of protrusions 1012 protrude upwards, each protrusion 1012 is They are evenly spaced in the horizontal direction, and each protrusion 1012 passes through the multi-layer tabs 20211 .
  • the connection strength between the tab 20211 and the connecting piece 101 is improved, the connection is stable, and the reliability of the battery cell 1000 is ensured.
  • the connecting piece 101 of the embodiment of the present invention by providing the protrusion 1012 on the connecting piece 101, the connecting piece 101 is easy to connect with the tab 20211, and the welding energy is easy to penetrate the connecting piece 101 and the tab 20211, reducing the stress of the tab 20211. Difficulty in welding simplifies the welding process for workers, reduces man-hours and labor costs, improves the connection strength between the tab 20211 and the connector 101 , and ensures the reliability of the battery cell 1000 .
  • the connecting plate 1011 is integrally formed with a plurality of protrusions 1012, thus reducing the number of components of the connecting piece 101, improving the overall connection strength of the connecting piece 101, and improving the connection between the connecting piece 101 and The connection stability of the tab 20211 reduces the defective rate of the connector 101 and prolongs the service life of the connector 101 .
  • the connecting plate 1011 and the plurality of protrusions 1012 are arranged separately, and the plurality of protrusions 1012 are connected to the connecting plate 1011 by welding, bonding, inserting or clamping, so that the connecting plate 1011 and protrusion 1012 are two independent parts, which reduces the production difficulty of the connector 101 , reduces the production cost of the connector 101 , and improves the error tolerance rate during the welding process of the connector 101 and the tab 20211 .
  • the plurality of protrusions 1012 are connected to the connection plate 1011 by welding, the connection method is simple, and the connection between the protrusions 1012 and the connection plate 1011 is firm and not easily damaged.
  • the plurality of protrusions 1012 can be connected to the connection plate 1011 by electromagnetic pulse welding; the plurality of protrusions 1012 can also be connected to the connection plate 1011 by friction welding; the plurality of protrusions 1012 can also be connected by ultrasonic welding The way is connected with the connecting board 1011.
  • the connecting piece 101 further includes: a raised plate (not shown in the figure), the raised plate is fixed on the connecting plate 1011, and a plurality of protrusions 1012 are arranged on the raised plate away from the connecting plate 1011 side. That is to say, the connector 101 includes a raised plate and a connecting plate 1011, the raised plate is fixedly connected to the connecting plate 1011, the raised plate is integrally formed with a plurality of protrusions 1012, and the plurality of protrusions 1012 are formed on the side facing away from the raised plate.
  • One side surface of the connecting plate 1011 (for example, the upper side surface shown in FIG. 4 ). In this way, damage to the structure of the connecting plate 1011 is avoided, and the manufacturing process of welding a plurality of protrusions 1012 on the connecting plate 1011 is simplified.
  • a plurality of protrusions 1012 are arranged in a matrix on one side of the connecting plate 1011, and the plurality of protrusions 1012 arranged in an array improves the connection strength between the tab 20211 and the connecting piece 101, It avoids the detachment of the tab 20211 and the connector 101 during transportation or use, improves the yield rate of the battery cell 1000, increases the contact area between the protrusion 1012 and each layer of the tab 20211, and increases the overcurrent Small size, balanced heat dissipation, and the battery pack is not prone to failure, which reduces the user's risk factor and improves the user's experience.
  • the protrusion 1012 extends along a straight line and/or a curve on the surface of the connecting plate 1011 . That is to say, the protrusion 1012 on the surface of the connecting plate 1011 may extend along a straight line, the protrusion 1012 may also extend along a curve on the surface of the connecting plate 1011, and the protrusion 1012 may also extend on the surface of the connecting plate 1011 Extend in a straight line and then in a curve, or in a curve and then in a straight line.
  • the welding requirements of different composite current collectors 202 are met, the connection strength between the tab 20211 and the connector 101 is improved, the use range of the connector 101 is expanded, and the production cost of the connector 101 is reduced.
  • the protrusion 1012 extends along a curve on the upper surface of the connecting plate 1011, the protrusion 1012 is formed in a ring shape, and four grooves are formed on the upper part of the protrusion 1012, and the four grooves are formed on the upper part of the protrusion 1012. Evenly spaced, and the four grooves are recessed from the upper end of the protrusion 1012 in the vertical direction, which increases the contact area between the protrusion 1012 and each layer of tabs 20211, increases the flow area, and improves the connection strength.
  • the width of the protrusion 1012 is in the range of 0.1mm-3mm, thereby not only avoiding material waste, but also ensuring the stability of the connection between the tab 20211 and the connecting member 101 .
  • the width of the protrusion 1012 can be: 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.55mm, 0.6mm, 0.85mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.35mm, 1.4 mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.45mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, etc.
  • the cross section of the protrusion 1012 perpendicular to the protrusion height may be circular, elliptical or polygonal.
  • the protrusion 1012 when the cross-section of the protrusion 1012 perpendicular to the protrusion height is circular, the protrusion 1012 can be cylindrical, conical, or frustum-shaped, etc.; When shaped, the protrusion 1012 can be an elliptical cylinder, an elliptical cone or an elliptical truncated shape, etc.; It can be triangular pyramid, triangular prism, quadrangular pyramid, quadrangular prism, pentagonal pyramid, hexagonal pyramid and so on.
  • the height of the protrusion 1012 protruding from the connecting plate 1011 is in the range of 0.1 mm to 3 mm, thus avoiding material waste and ensuring the connection strength between the tab 20211 and the connecting piece 101 , and the overall structure of the battery cell 1000 is easy to assemble into a battery pack, which saves installation space, makes the structure compact, reduces the volume of the battery pack, and reduces transportation costs.
  • the height of the protrusion 1012 protruding from the connecting plate 1011 can be: 0.1mm, 0.15mm, 0.2mm, 0.4mm, 0.55mm, 0.6mm, 0.85mm, 1.0mm, 1.1mm, 1.2mm, 1.35mm, 1.4 mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 2.0mm, 2.2mm, 2.45mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, etc.
  • the connecting plate 1011 and the protrusion 1012 are made of the same material. Due to different materials, the parameters such as temperature resistance and resistance of conductors are also different, and there are great potential safety hazards. However, using the same material ensures the reliability of the battery cell 1000, reduces the failure rate, and also ensures the safety of the battery pack. Use safety to avoid accidents.
  • the connecting plate 1011 is made of T2 pure copper or copper alloy and the like.
  • the connecting piece 101 can be connected to the multi-layer tab 20211 by ultrasonic welding, the connecting piece 101 includes: a connecting plate 1011 and a protrusion 1012 provided on the connecting plate 1011, and the protrusion 1012 protrudes from the connecting plate 1011 On one side of the surface in the thickness direction, the connecting plate 1011 has a plurality of protrusions 1012, and the plurality of protrusions 1012 pass through the multi-layer tab 20211, and the density of the plurality of protrusions 1012 in the ultrasonic vibration direction is greater than that of the ultrasonic vibration The density of directions other than the direction.
  • the multi-layer tab 20211 is connected to the connector 101 by ultrasonic welding, the connector 101 has a connecting plate 1011 and a plurality of protrusions 1012, the multi-layer tab 20211 is passed through by a plurality of protrusions 1012, and the plurality of protrusions 1012 are arranged at intervals on one surface of the connection plate 1011 in the thickness direction, and a plurality of protrusions 1012 protrude toward the direction away from the connection plate 1011, and the plurality of protrusions 1012 are arranged in the most intensive degree in the ultrasonic vibration direction, The denseness of the plurality of protrusions 1012 in directions other than the direction of ultrasonic vibration is smaller than that of the plurality of protrusions 1012 in the direction of ultrasonic vibration.
  • the ultrasonic wave acts on the contact surface of the weld to generate tens of thousands of high-frequency vibrations per second, and a plurality of protrusions 1012 are densely arranged along the vibration direction of the ultrasonic wave. It is easier for energy to penetrate the connecting piece 101 and the tab 20211 , which reduces the difficulty of welding the tab 20211 and the connecting piece 101 .
  • the connecting plate 1011 is formed in the shape of a horizontally extending plate, and a plurality of protrusions 1012 are arranged on the upper surface of the connecting plate 1011, and the plurality of protrusions 1012 protrude upward, and each protrusion 1012
  • the protrusions 1012 are evenly spaced in the horizontal direction, and each protrusion 1012 passes through the multi-layer lug 20211, and the plurality of protrusions 1012 are most densely arranged in the ultrasonic vibration direction. Therefore, the welding energy can easily penetrate the connecting piece 101 and the tab 20211 , which reduces the difficulty of welding the tab 20211 and simplifies the welding process for workers.
  • connection plate 1011 in the thickness direction of the tab 20211 (for example, in the up-and-down direction shown in FIG. 19), the connection plate 1011 is arranged on the other side of the multi-layer tab 20211 (for example, the lower side of the multi-layer tab 20211 shown in FIG. 19 ), the connection plate 1011 and the protrusion 1012
  • One end of the protrusion 1012 (such as the lower end of the protrusion 1012 shown in FIG.
  • the protrusion 1012 is prevented from being damaged, and the service life of the multi-layer tab 20211 is prolonged.
  • the protrusion 1012 includes two parts: a connection section 10121 and a puncture section 10122.
  • the lower part of the protrusion 1012 is the connection section 10121, and the upper part of the protrusion 1012 is the puncture section 10122.
  • 10121 is connected to the connection plate 1011, and the piercing section 10122 is connected to the upper end of the connection section 10121.
  • the piercing section 10122 of the protrusion 1012 is used to pierce the multi-layer tab 20211
  • the connecting section 10121 of the protrusion 1012 is used to connect the multi-layer tab 20211, so that welding energy can easily penetrate the connecting piece 101 and the tab 20211 , reducing the welding difficulty between the tab 20211 and the connecting piece 101, reducing the man-hours of manufacture, improving the connection strength between the tab 20211 and the connecting piece 101, the connection is stable, and ensuring the piercing effect of the protrusion 1012, while improving connection strength.
  • a connecting piece 101 according to a specific embodiment of the present invention will be described below with reference to FIGS. 1-28 .
  • the protrusion 1012 is formed in a strip shape
  • the connector 101 has a connecting plate 1011 and a protrusion 1012
  • the connecting plate 1011 has a plurality of protrusions 1012
  • each protrusion 1012 protrudes upwards from the upper surface of the connecting plate 1011
  • a plurality of protrusions 1012 are arranged in a matrix on the upper surface of the connecting plate 1011
  • the length L of the protrusions 1012 is 13 mm
  • the height of the protrusions 1012 is 0.6 mm
  • the width d of the protrusions 1012 is 0.6 mm
  • the protrusions 1012 The upper surface of the connecting plate 1011 extends along a straight line
  • the connecting plate 1011 is integrally formed with a plurality of protrusions 1012 .
  • the connecting piece 101 according to the embodiment of the second aspect of the present invention will be described below with reference to FIGS. 1-21 and 28 .
  • the connecting piece 101 includes: a connecting plate 1011 and a protrusion 1012 .
  • the connecting piece 101 is used to electrically connect the multi-layer tabs 20211
  • the connecting piece 101 includes: a connecting plate 1011 and a protrusion 1012
  • the protrusion 1012 is arranged on the connecting plate 1011
  • the protrusion 1012 protrudes from the connecting plate 1011
  • the end of the protrusion 1012 away from the connecting plate 1011 is formed as a piercing end, and the piercing end is configured to be suitable for piercing the multi-layer tab 20211 .
  • the multi-layer tab 20211 is electrically connected through the connector 101, the connector 101 has a connecting plate 1011 and a protrusion 1012, the multi-layer tab 20211 is passed by the protrusion 1012, and the protrusion 1012 is arranged on the connecting plate 1011 On one side surface in the thickness direction, the protrusion 1012 protrudes toward the direction away from the connecting plate 1011, and the end of the protrusion 1012 away from the connecting plate 1011 (such as the upper end of the protrusion 1012 shown in FIG. 4 ) is a piercing end,
  • the multi-layer tab 20211 is suitable for being pierced by the piercing end.
  • the connecting plate 1011 is formed into a plate shape extending horizontally, and a plurality of protrusions 1012 are arranged on the upper surface of the connecting plate 1011, and each protrusion 1012 is evenly spaced in the horizontal direction, and the plurality of protrusions 1012 protrude upwards, the upper end of the protrusion 1012 is formed as a piercing end, and the top of the piercing end is a tip, and the piercing end pierces through each layer of tabs 20211 .
  • the connection strength between the tab 20211 and the connecting piece 101 is improved, the connection is stable, and the reliability of the battery cell 1000 is ensured.
  • the piercing end can easily pierce the multi-layer tab 20211, and the welding energy can easily penetrate the connector 101 and the multi-layer tab 20211, It reduces the welding difficulty of the tab 20211, simplifies the welding process of workers, reduces the man-hours of production, reduces the labor cost, improves the connection strength between the tab 20211 and the connector 101, and the connection is stable, ensuring that the battery cell 1000 reliability.
  • the protrusion 1012 is formed as a conical protrusion 1012, and the apex angle of the conical protrusion 1012 is greater than 5° and less than 150°, which is more conducive to the balance between the protrusion 1012 and the tab 20211.
  • connection strength and welding difficulty to avoid ignoring the welding difficulty in order to ensure the connection strength between the protrusion 1012 and the tab 20211, or ignoring the connection strength between the protrusion 1012 and the tab 20211 in order to reduce the welding difficulty, thereby ensuring the protrusion While having the piercing effect of 1012, it also improves the connection strength.
  • the apex angle of the conical protrusion 1012 can be: 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145° , 150° and so on.
  • the protrusion 1012 is formed as a truncated conical protrusion 1012 , and the ratio between the radius of the top surface and the radius of the bottom surface of the truncated conical protrusion 1012 is not greater than 0.6. That is to say, the top surface of the protrusion 1012 has a certain angle with the surrounding surface of the protrusion 1012 , and the area of the top surface of the protrusion 1012 is smaller than the area of the bottom surface of the protrusion 1012 .
  • the top surface of the protrusion 1012 is easy to pierce the multi-layer tab 20211 , which ensures the piercing effect of the protrusion 1012 , reduces the melting of the protrusion 1012 during the welding process, and improves the reliability of the battery cell 1000 .
  • the ratio between the radius of the top surface and the radius of the bottom surface of the protrusion 1012 may be: 0.6, 0.55, 0.5, 0.45, 0.4, 0.35, 0.3, 0.25, 0.2, 0.15, 0.1 and so on.
  • the radius of the top surface of the protrusion 1012 is not greater than 1.5 mm, and the radius of the bottom surface of the protrusion 1012 is not greater than 2.5 mm.
  • the radius of the top surface of the protrusion 1012 can be: 1.5mm, 1.4mm, 1.3mm, 1.2mm, 1.1mm, 1.0mm, 0.8mm, 0.6mm, 0.4mm, 0.2mm, 0.1mm, etc.; the protrusion 1012
  • the radius of the bottom surface can be: 2.5mm, 2.4mm, 2.3mm, 2.2mm, 2.1mm, 2.0mm, 1.9mm, 1.8mm, 1.7mm, 1.6mm, 1.5mm, 1.4mm, 1.3mm, 1.2mm, 1.1mm , 1.0mm, 0.8mm, 0.6mm, 0.4mm, 0.2mm, 0.1mm and so on.
  • the cross section of the protrusion 1012 perpendicular to the extending direction is formed as a triangle, and in the cross section, the angle of the piercing end is not greater than 120°. That is, the protrusion 1012 may be a prism.
  • the protrusion 1012 with a triangular cross-section is easier to pierce the multi-layer tab 20211, the piercing effect of the protrusion 1012 can be guaranteed, and the angle of the piercing end is not greater than 120°, which can further ensure the piercing effect of the protrusion 1012 and further reduce the The difficulty of welding the tab 20211 and the connector 101.
  • angles of the piercing ends can be: 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, etc.
  • the section along the extension direction of the protrusion 1012 is formed as a triangle, and in the section, the angle of the piercing end is not greater than 120°. That is to say, the protrusion 1012 can be a pyramid, and the protrusion 1012 can also be a cone.
  • the angle of the piercing end can be: 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55° , 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, etc.
  • the section of the protrusion 1012 perpendicular to the extension direction is trapezoidal, and the ratio of the upper base to the lower base of the section is not greater than 0.6. That is to say, the protrusion 1012 can also be a prism, the protrusion 1012 can also be a prism, the protrusion 1012 can also be a circular platform, the lower bottom of the protrusion 1012 is connected with the connector 101, and the upper base of the protrusion 1012 is smaller than the protrusion.
  • the lower bottom of 1012, the piercing effect of the protrusion 1012 can be guaranteed, and the ratio of the upper bottom to the lower bottom of the section is not greater than 0.6, which can further ensure the piercing effect of the protrusion 1012, and further reduce the contact between the tab 20211 and the connector 101. difficulty of welding.
  • the ratio of the upper base to the lower base of the section of the protrusion 1012 can be: 0.6, 0.55, 0.5, 0.45, 0.4, 0.35, 0.3, 0.25, 0.2, 0.15, 0.1 and so on.
  • the upper base of the section of the protrusion 1012 is not greater than 3 mm, and the lower base of the section of the protrusion 1012 is not greater than 5 mm.
  • the upper bottom of the section of the protrusion 1012 can be: 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.4 mm, 2.6mm, 2.8mm, 3.0mm, etc.
  • the lower bottom of the section of the protrusion 1012 can be: 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm , 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4.0mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5.0 mm and so
  • the protrusion 1012 includes a connecting section 10121 and a puncture section 10122 connected in the height direction of the protrusion 1012, the connecting section 10121 is connected with the connecting plate 1011, and the puncturing section 10122 is connected to the remote connection of the connecting section 10121.
  • the protrusion 1012 includes two parts: a connection section 10121 and a puncture section 10122, the lower part of the protrusion 1012 is the connection section 10121, the upper part of the protrusion 1012 is the puncture section 10122, and the connection section 10121 is connected to the connecting plate 1011,
  • the piercing section 10122 is connected to the upper end of the connecting section 10121, and the cross-sectional area of the connecting section 10121 is the same in the up-down direction as shown in FIG. 4 .
  • the piercing section 10122 of the protrusion 1012 is used to pierce the multi-layer tab 20211
  • the connecting section 10121 of the protrusion 1012 is used to connect the multi-layer tab 20211, so that the welding energy is easy to penetrate the connecting piece 101 and the tab 20211 , reducing the welding difficulty between the tab 20211 and the connector 101, reducing the man-hours of manufacture, improving the connection strength between the tab 20211 and the connector 101, and the connection is stable, which ensures the piercing effect of the protrusion 1012 and improves connection strength.
  • the height of the protrusion 1012 is no greater than 5 mm.
  • the height of the protrusion 1012 can be: 5mm, 4.5mm, 4mm, 3.5mm, 3mm, 2.5mm, 2mm, 1.5mm, 1mm, 0.5mm and so on.
  • the user can select a protrusion 1012 with a suitable height according to the thickness of the multi-layer tab 20211 .
  • the height of the piercing section 10122 is not greater than 2mm.
  • the height of the piercing section 10122 can be: 2mm, 1.8mm, 1.6mm, 1.4mm, 1.2mm, 1mm, 0.8mm, 0.6mm, 0.4mm, 0.2mm and so on.
  • the height of the connecting section 10121 is not greater than 3 mm.
  • the height of the connecting section 10121 can be: 3mm, 2.8mm, 2.6mm, 2.4mm, 2.2mm, 2mm, 1.8mm, 1.6mm, 1.4mm, 1.2mm, 1mm, 0.8mm, 0.6mm, 0.4mm, 0.2mm, etc. Wait. As a result, the connection strength between the tab 20211 and the connector 101 is improved, the tab 20211 and the connector 101 are not easily separated, and the yield rate is improved.
  • the cross-sectional area of the piercing section 10122 gradually decreases, and the apex angle of the piercing section 10122 is not greater than 120°.
  • the cross-sectional area of the piercing section 10122 gradually decreases from bottom to top, the bottom surface of the piercing section 10122 has the largest cross-sectional area, and the top of the piercing section 10122 has the smallest cross-sectional area.
  • the protrusion 1012 is easier to pierce the multi-layer tab 20211, which reduces the difficulty of welding the tab 20211 and the connector 101, reduces the welding time between the tab 20211 and the connector 101, and improves production efficiency.
  • the connecting section 10121 and the piercing section 10122 make a smooth transition. Due to the friction between the tab 20211 and the protrusion 1012 during the welding process, the protrusion 1012 that smoothly transitions between the connecting section 10121 and the puncture section 10122 is not easy to damage the tab 20211, prolonging the service life of the tab 20211 and ensuring the battery cell 1000 The yield rate improves the safety and reliability of the battery pack.
  • the connecting plate 1011 and the protrusion 1012 are made of the same material. Due to different materials, the parameters such as temperature resistance and resistance of conductors are also different, and there are great potential safety hazards. However, using the same material ensures the reliability of the battery cell 1000, reduces the failure rate, and also ensures the safety of the battery pack. Use safety to avoid accidents.
  • the connecting plate 1011 is made of T2 pure copper or copper alloy and the like.
  • the width of the protrusion 1012 is in the range of 0.1 mm-3 mm, thereby not only avoiding material waste, but also ensuring the stability of the connection between the tab 20211 and the connecting member 101 .
  • the width of the protrusion 1012 can be: 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.55mm, 0.6mm, 0.85mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.35mm, 1.4 mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.45mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, etc.
  • the cross section of the protrusion 1012 perpendicular to the protrusion height may be circular, elliptical or polygonal.
  • the protrusion 1012 when the cross section of the protrusion 1012 perpendicular to the protrusion height is circular, the protrusion 1012 can be conical or truncated cone, etc.; when the cross section of the protrusion 1012 perpendicular to the protrusion height is elliptical, Protrusion 1012 can be ellipse cone or ellipse truncated shape etc.; 1012 can be triangular pyramid, triangular prism, quadrangular pyramid, quadrangular prism, pentagonal pyramid, hexagonal pyramid and so on.
  • the connecting piece 101 according to a specific embodiment of the present invention will be described below with reference to FIGS. 1-21 and 28 .
  • the protrusion 1012 is formed in a strip shape
  • the connector 101 has a connecting plate 1011 and a protrusion 1012
  • the protrusion 1012 protrudes upwards from the upper surface of the connecting plate 1011
  • the protrusion 1012 is on the upper surface of the connecting plate 1011
  • the thickness of the connecting plate 1011 is 0.8 mm
  • the length L of the protrusion 1012 is 13 mm
  • the width d of the protrusion 1012 is 0.6 mm
  • the height of the connecting section 10121 of the protrusion 1012 is 0.4 mm
  • the length L of the protrusion 1012 is 0.4 mm.
  • the height of the piercing section 10122 is 0.2mm, the angle of the top angle of the piercing section 10122 is 67°, the cross-sectional area of the connecting section 10121 in the up and down direction is the same, and the cross-sectional area of the piercing section 10122 decreases gradually in the direction from bottom to top.
  • the protrusion 1012 extends in a straight line on the upper surface of the connecting plate 1011 , and the connecting plate 1011 and the protrusion 1012 are integrally formed.
  • the connecting piece 101 according to the embodiment of the third aspect of the present invention will be described below with reference to FIG. 1 , FIG. 3 , FIG. 19 , and FIG. 23 to FIG. 28 .
  • the connecting piece 101 includes: a connecting plate 1011 and a protrusion 1012 .
  • the connecting piece 101 is used to electrically connect the multi-layer tabs 20211
  • the connecting piece 101 includes: a connecting plate 1011 and a protrusion 1012
  • the protrusion 1012 is arranged on the connecting plate 1011
  • the protrusion 1012 protrudes from the connecting plate 1011
  • the connecting plate 1011 On one side of the surface in the thickness direction, the connecting plate 1011 has a plurality of protrusions 1012, and the plurality of protrusions 1012 are arranged at intervals on the connecting plate 1011.
  • the free end surface of the protrusion 1012 is formed as a plane.
  • the multi-layer tab 20211 is electrically connected through the connector 101, the connector 101 has a connecting plate 1011 and a protrusion 1012, the multi-layer tab 20211 is passed by the protrusion 1012, and the protrusion 1012 is arranged on the connecting plate 1011 On one surface in the thickness direction, the protrusions 1012 protrude toward the direction away from the connecting plate 1011, the connecting plate 1011 has a plurality of protrusions 1012, and the plurality of protrusions 1012 are arranged at intervals on the connecting plate 1011, and the plurality of protrusions 1012 Through the multi-layer lug 20211, in the height direction of the protrusion 1012 (for example, the up-down direction shown in FIG. 23), the end surface of the free end of the protrusion 1012 (for example, the top end of the protrusion 1012 shown in FIG. 23) is a plane.
  • the connecting plate 1011 is formed in the shape of a horizontally extending plate body, and a plurality of protrusions 1012 are arranged on the upper surface of the connecting plate 1011, and each protrusion 1012 is evenly spaced in the horizontal direction, and the plurality of protrusions 1012 All protrude upwards, each protrusion 1012 is evenly spaced in the horizontal direction, each protrusion 1012 passes through the multi-layer tab 20211, in the up and down direction of each protrusion 1012, each protrusion 1012 The top ends are all formed as flat surfaces.
  • the connection strength between the tab 20211 and the connecting piece 101 is improved, the connection is stable, and the reliability of the battery cell 1000 is ensured.
  • the protrusion 1012 is easy to pierce the multi-layer tab 20211, and the welding energy is easy to penetrate the connector 101 and the multi-layer pole.
  • the ear 20211 reduces the welding difficulty of the tab 20211, simplifies the welding process of the workers, reduces the man-hours of production, reduces the labor cost, improves the connection strength between the tab 20211 and the connector 101, and ensures that the battery cell 1000
  • the reliability of the battery reduces the failure rate, improves the safety factor of the battery cell 1000, ensures the safety of the battery cell 1000, avoids potential safety hazards, and reduces the occurrence of dangerous accidents.
  • the cross-sectional areas of the protrusions 1012 are the same. Referring to Fig. 23, the cross-sectional area of the protrusion 1012 remains unchanged from bottom to top, thus ensuring that the connection area between the protrusion 1012 and each layer of tabs 20211 is roughly consistent. Due to the different contact areas, the tabs Parameters such as resistance and current between 20211 and protrusion 1012 are also different, which avoids potential safety hazards.
  • the cross-sectional area of the protrusion 1012 is no greater than 5 mm 2 . If the cross-sectional area is too large, it will affect the protrusion 1012 to penetrate the multi-layer tab 20211, and the welding energy will not easily penetrate the connecting piece 101 and the tab 20211, which will increase the difficulty of welding the tab 20211 and the connecting piece 101. If the cross-sectional area is too small , then the effective contact area between each protrusion 1012 and each layer of tabs 20211 is reduced, which increases the use risk of the battery cell 1000 .
  • the cross-sectional area of the protrusion 1012 can be: 5mm 2 , 4.5mm 2 , 4mm 2 , 3.5mm 2 , 3mm 2 , 2.5mm 2 , 2mm 2 , 1.5mm 2 , 1mm 2 , 0.5mm 2 and so on.
  • the cross-sectional shape of the protrusion 1012 perpendicular to the protrusion height is a circle, an ellipse or a polygon.
  • the protrusion 1012 can be cylindrical; when the cross section of the protrusion 1012 perpendicular to the protrusion height is oval, the protrusion 1012 can be an elliptical cylinder ;
  • the cross-sectional shape of the protrusion 1012 perpendicular to the height of the protrusion is a polygon, the cross-section can be a triangle, a quadrangle, a pentagon or a hexagon, etc., and the protrusion 1012 can be a triangular prism, a quadrangular prism, a pentagonal prism or a hexagonal prism etc.
  • the ratio of the cross-sectional area of the protrusion 1012 to the height of the protrusion 1012 is no greater than 5. In this way, it is more conducive to balancing the connection strength and welding difficulty between the protrusion 1012 and the tab 20211, avoiding ignoring the welding difficulty in order to ensure the connection strength between the protrusion 1012 and the tab 20211, or ignoring the welding difficulty between the protrusion 1012 and the tab 20211 in order to reduce the welding difficulty.
  • the connection strength between the tabs 20211 can improve the connection strength while ensuring the piercing effect of the protrusion 1012 .
  • the ratio of the cross-sectional area of the protrusion 1012 to the height of the protrusion 1012 may be: 5, 4.5, 4, 3.5, 3, 2.5, 2, 1.5, 1, 0.5 and so on.
  • the cross-sectional shape of the protrusion 1012 is formed as a circle, and the radius of the protrusion 1012 is not greater than 3mm.
  • the radius of the protrusion 1012 can be: 0.1mm, 0.15mm, 0.2mm, 0.4mm, 0.55mm, 0.6mm, 0.85mm, 1.0mm, 1.1mm, 1.2mm, 1.35mm, 1.4mm, 1.5mm, 1.6 mm, 1.7mm, 1.8mm, 2.0mm, 2.2mm, 2.45mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, etc.
  • the cross-sectional shape of the protrusion 1012 is formed as a square, and the side length of the cross-section of the protrusion 1012 is not greater than 3 mm.
  • the side length of the section of the protrusion 1012 can be: 0.1mm, 0.15mm, 0.2mm, 0.4mm, 0.55mm, 0.6mm, 0.85mm, 1.0mm, 1.1mm, 1.2mm, 1.35mm, 1.4mm, 1.5mm , 1.6mm, 1.7mm, 1.8mm, 2.0mm, 2.2mm, 2.45mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, etc.
  • the ratio between the side length of the section of the protrusion 1012 and the height of the protrusion 1012 is not greater than 1.
  • the ratio between the side length of the section of the protrusion 1012 and the height of the protrusion 1012 : 1, 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1 and so on.
  • the connecting plate 1011 and the protrusion 1012 are made of the same material. Due to different materials, the parameters such as temperature resistance and resistance of conductors are also different, and there are great potential safety hazards. However, using the same material ensures the reliability of the battery cell 1000, reduces the failure rate, and also ensures the safety of the battery pack. Use safety to avoid accidents.
  • the connecting plate 1011 is made of T2 pure copper or copper alloy and the like.
  • the protrusion 1012 extends along a curve on the upper surface of the connecting plate 1011, the protrusion 1012 is formed in a ring shape, and four grooves are formed on the upper part of the protrusion 1012, and the four grooves are formed on the upper part of the protrusion 1012. Evenly spaced, and the four grooves are recessed from the upper end of the protrusion 1012 in the vertical direction, which increases the contact area between the protrusion 1012 and each layer of tabs 20211, increases the flow area, and improves the connection strength.
  • a connecting member 101 according to a specific embodiment of the present invention will be described below with reference to FIGS. 1 , 3 , 19 , 23 to 28 .
  • the connector 101 has a connecting plate 1011 and a protrusion 1012, the protrusion 1012 protrudes upwards from the upper surface of the connecting plate 1011, and the protrusions 1012 are arranged in a matrix on the upper surface of the connecting plate 1011, the connecting plate 1011
  • the thickness is 0.8 mm
  • the length L of the protrusion 1012 is 13 mm
  • the width d of the protrusion 1012 is 0.6 mm
  • the height of the protrusion 1012 is 0.6 mm
  • the cross-sectional area of the protrusion 1012 in the up and down direction is the same, and the protrusion 1012 is connected
  • the upper surface of the plate 1011 extends along a straight line, and the connecting plate 1011 and the protrusion 1012 are integrally formed.
  • the connecting piece 101 according to the embodiment of the fourth aspect of the present invention will be described below with reference to FIGS. 1-28 .
  • the connecting piece 101 includes: a connecting plate 1011 and a protrusion 1012 .
  • the connecting piece 101 is used to connect with the multi-layer tab 20211 by ultrasonic welding.
  • the connecting piece 101 includes: a connecting plate 1011 and a protrusion 1012 arranged on the connecting plate 1011.
  • the protrusion 1012 protrudes from the connecting plate 1011 by a thickness of
  • the connecting plate 1011 has a plurality of protrusions 1012, and the plurality of protrusions 1012 pass through the multi-layer tab 20211.
  • the density of the plurality of protrusions 1012 in the direction of ultrasonic vibration is greater than that in the direction of ultrasonic vibration. density in other directions.
  • the multi-layer tab 20211 is connected to the connector 101 by ultrasonic welding, the connector 101 has a connecting plate 1011 and a plurality of protrusions 1012, the multi-layer tab 20211 is passed through by a plurality of protrusions 1012, and the plurality of protrusions 1012 are arranged at intervals on one surface of the connection plate 1011 in the thickness direction, and a plurality of protrusions 1012 protrude toward the direction away from the connection plate 1011, and the plurality of protrusions 1012 are arranged in the most intensive degree in the ultrasonic vibration direction, The denseness of the plurality of protrusions 1012 in directions other than the direction of ultrasonic vibration is smaller than that of the plurality of protrusions 1012 in the direction of ultrasonic vibration.
  • the ultrasonic wave acts on the contact surface of the weld to generate tens of thousands of high-frequency vibrations per second, and a plurality of protrusions 1012 are densely arranged along the vibration direction of the ultrasonic wave. It is easier for energy to penetrate the connecting piece 101 and the tab 20211 , which reduces the difficulty of welding the tab 20211 and the connecting piece 101 .
  • the connecting plate 1011 is formed into a plate shape extending horizontally, a plurality of protrusions 1012 are arranged on the upper surface of the connecting plate 1011, and the plurality of protrusions 1012 protrude upwards, each protrusion 1012 is
  • the protrusions 1012 are evenly spaced in the horizontal direction, and each protrusion 1012 passes through the multi-layer lug 20211, and the plurality of protrusions 1012 are most densely arranged in the ultrasonic vibration direction. Therefore, the welding energy can easily penetrate the connecting piece 101 and the tab 20211 , which reduces the difficulty of welding the tab 20211 and simplifies the welding process for workers.
  • connection piece 101 of the embodiment of the present invention the tabs 20211 are lifted by providing a plurality of protrusions 1012 arranged on the connection piece 101 in the direction of ultrasonic vibration more densely than in directions other than the direction of ultrasonic vibration.
  • the welding speed with the connecting piece 101 reduces the manufacturing man-hours, reduces the production cost of the battery cell 1000, and improves the production efficiency of the battery pack.
  • the protrusions 1012 are formed in the shape of a strip extending in the direction of ultrasonic vibration.
  • the distance between two adjacent protrusions 1012 in the ultrasonic vibration direction is L1
  • the distance between two adjacent protrusions 1012 perpendicular to the ultrasonic vibration direction is L2
  • L1 and L2 satisfy: 0.5mm ⁇ L1 ⁇ 10mm, 0.5mm ⁇ L2 ⁇ 10mm, and L1 ⁇ L2. That is to say, the distance between two adjacent protrusions 1012 in the direction of ultrasonic vibration is not greater than the distance between two adjacent protrusions 1012 perpendicular to the direction of ultrasonic vibration, that is, a plurality of protrusions 1012 in the vertical
  • the denseness of arrangement in the direction of ultrasonic vibration is smaller than that of arrangement in the direction of ultrasonic vibration. In this way, the welding speed is further improved, the production efficiency is improved, the production cost is reduced, the arrangement of the protrusions 1012 is optimized, the weak welding point between the lug 20211 and the connector 101 is avoided, and the product quality is improved.
  • the distance L1 between two adjacent protrusions 1012 in the ultrasonic vibration direction can be: 0.5mm, 0.7mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5 mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc.
  • the distance L2 between two adjacent protrusions 1012 perpendicular to the ultrasonic vibration direction can be: 0.5mm, 0.7mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm , 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm and so on.
  • a plurality of protrusions 1012 extend along the direction of ultrasonic vibration on the surface of the connecting plate 1011 and are arranged at intervals in a direction perpendicular to the direction of ultrasonic vibration.
  • a plurality of protrusions 1012 extend along the vibration direction of the ultrasonic wave on the upper surface of the connecting plate 1011, and are arranged at intervals in a direction perpendicular to the direction of the ultrasonic vibration.
  • the protrusions 1012 are formed in a strip shape, increasing the The contact area between the tab 20211 and the protrusion 1012 avoids weak welding between the tab 20211 and the connector 101 , and improves the connection strength between the tab 20211 and the connector 101 .
  • the distance L2 between two adjacent protrusions 1012 is not less than the width d of the protrusions 1012 . That is to say, the distance L2 between two adjacent protrusions 1012 in the direction perpendicular to the ultrasonic vibration direction is greater than or equal to the width d of the protrusions 1012, and L2 may be greater than d, or L2 may be equal to d.
  • the length of the protrusion 1012 in the ultrasonic vibration direction is L
  • the width of the protrusion 1012 perpendicular to the ultrasonic vibration direction is d
  • L and d satisfy: L*2+d*2 ⁇ X/4
  • X is the width of tab 20211.
  • L and d can satisfy: L*2+d*2 ⁇ X/4, L and d can also satisfy: L*2+d*2 ⁇ X/3, L and d can also satisfy: L* 2+d*2 ⁇ X/2, L and d can also satisfy: L*2+d*2 ⁇ X and so on.
  • L and d satisfy: L*2+d*2 ⁇ X, where X is the width of the tab 20211 .
  • X is the width of the tab 20211 .
  • the circumference of the protrusion 1012 should not be smaller than the width of the tab 20211 . In this way, the connection strength between the protrusion 1012 and the tab 20211 is further improved, the flow area is further increased, the flow capacity of the connection piece 101 is further improved, the temperature rise rate is further reduced, and the flow resistance of the connection piece 101 is further improved. safety performance.
  • the width X of the tab 20211 is the side length of the tab 20211 perpendicular to the direction of ultrasonic vibration. Referring to FIG. 16 , the length of the tab 20211 in the left and right direction is the width of the tab 20211 .
  • a connecting piece 101 according to a specific embodiment of the present invention will be described below with reference to FIGS. 1-28 .
  • the protrusion 1012 is formed in a strip shape
  • the connector 101 has a connecting plate 1011 and a protrusion 1012
  • the connecting plate 1011 has a plurality of protrusions 1012
  • each protrusion 1012 protrudes upwards from the upper surface of the connecting plate 1011
  • each protrusion 1012 is formed as a strip extending in a straight line on the upper surface of the connecting plate 1011
  • a plurality of protrusions 1012 extend along the ultrasonic vibration direction on the upper surface of the connecting plate 1011
  • the thickness of the connecting plate 1011 is 0.8mm
  • the length a of the connecting plate 1011 in the front-to-back direction is 80 mm
  • the length b of the connecting plate 1011 in the left-right direction is 30 mm
  • the length L of the protrusion 1012 is 13 mm
  • the width d of the protrusion 1012 is 0.6 mm
  • the height of the protrusion 1012 is 0.6 mm
  • the battery cell 1000 includes the pole piece 2021 and the conductive connection assembly 100, wherein the conductive connection assembly 100 includes the above-mentioned first aspect, the second aspect, the third aspect and the fourth aspect of the present invention
  • the connector 101 of the embodiment of any aspect includes the above-mentioned first aspect, the second aspect, the third aspect and the fourth aspect of the present invention
  • the battery cell 1000 of the embodiment of the present invention by applying the conductive connection assembly 100 provided with the above-mentioned connecting member 101 to the battery cell 1000, the difficulty of assembling the battery cell 1000 is reduced, and the manufacturing hours of the battery cell 1000 are reduced. , reducing the labor cost and ensuring the reliability of the battery cell 1000.
  • the battery pack according to the embodiment of the sixth aspect of the present invention includes the battery cell 1000 according to the embodiment of the fifth aspect of the present invention.
  • the battery pack of the embodiment of the present invention by providing the battery cell 1000 of the fifth embodiment, the safety performance of the battery pack is improved, the reliability of the battery pack is ensured, and danger is avoided.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as “first” and “second” may explicitly or implicitly include one or more of these features.
  • “plurality” means two or more, unless otherwise specifically defined.

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Abstract

一种连接件(101)、电池单体(1000)和电池包，连接件(101)用于电连接极片(2021)的多层极耳(20211)，连接件(101)包括：连接板(1011)和设于连接板(1011)上的凸起(1012)，凸起(1012)凸出于连接板(1011)在厚度方向的其中一侧表面，凸起(1012)穿过多层极耳(20211)。

Description

连接件、电池单体和电池包
优先权信息
本发明请求2021年07月14日向中国国家知识产权局提交的、专利申请号为202110798109.4、202110798364.9、202110798365.3、202110803671.1、202121603793.8、202121602695.2、202121602817.8、202121603554.2的专利申请的优先权和权益，并且通过参照将其全文并入此处。
技术领域
本发明涉及电池技术领域，尤其是涉及一种连接件、电池单体和电池包。
背景技术
相关技术中指出，单层极耳通过超声波辊焊的方式在复合极耳两侧焊接铜箔，焊接的铜箔在焊接在软连接上。该焊接方式每一层极耳都需要焊接，因此增加了焊接成本，以及铜箔的材料成本。
发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。为此，本发明在于提出一种连接件、电池单体和电池包，所述连接件设计巧妙，可以降低极耳的焊接难度。
本发明还提出一种电池单体。
本发明还提出一种电池包。
根据本发明的连接件，所述连接件用于电连接极片的多层极耳，所述连接件包括：连接板和设于所述连接板上的凸起，所述凸起凸出于所述连接板在厚度方向的其中一侧表面，所述凸起穿过多层所述极耳。
上述连接件，通过在连接件上设置凸起，连接件易于与极耳连接，降低了极耳的焊接难度，简化了工人的焊接过程，减少了制作工时，降低了人工成本，提高了极耳与连接件之间的连接强度，连接稳固，保证了电池单体的可靠性。
根据本发明第一方面的连接件，所述连接板有多个所述凸起，多个所述凸起在所述连接板上间隔设置，多个所述凸起穿过多层所述极耳。
在一些实施例中，所述连接板与多个所述凸起一体成型。
在一些实施例中，多个所述凸起通过焊接、粘接、插接、或卡接于所述连接板上。
在一些实施例中，所述连接件还包括：凸起板，所述凸起板固定于所述连接板上，多个所述凸起设于所述凸起板的背离所述连接板的一侧。
在一些实施例中，多个所述凸起在所述连接板的所述其中一侧表面呈矩阵式布置。
进一步地，所述凸起在所述连接板的表面上沿直线和/或曲线延伸。
进一步地，所述凸起的宽度在0.1mm-3mm范围内。
进一步地，所述凸起垂直于凸出高度的横截面呈圆形、椭圆形或多边形。
更进一步地，所述凸起凸出于所述连接板的高度在0.1mm到3mm范围。
更进一步地，所述连接板与所述凸起采用相同的材料制成。
根据本发明第二方面的连接件，所述凸起的远离所述连接板的一端形成为穿刺端，所述穿刺端构造成适于刺穿所述多层极耳。
根据本发明的连接件，通过在连接件上设置具有穿刺端的凸起，穿刺端易于刺穿多层极耳，焊接能量易于穿透连接件和多层极耳，降低了极耳的焊接难度，简化了工人的焊接过程，减少了制作工时，降低了人工成本，提高了极耳与连接件之间的连接强度，连接稳固，保证了电池单体的可靠性。
在一些实施例中，所述凸起形成为圆锥体凸起，所述圆锥体凸起的锥顶角度大于5°且小于150°。
在一些实施例中，所述凸起形成为圆台形凸起，所述圆台形凸起的顶面半径与底面半径之间的比值不大于0.6。
在一些实施例中，所述凸起在所述连接板的表面沿直线和/或曲线延伸。
在一些实施例中，所述凸起垂直于延伸方向的截面形成为三角形，在所述截面内，所述穿刺端的角度不大于120°。
在一些实施例中，所述凸起垂直于延伸方向的截面形成为梯形，所述截面的上底与下底的比值不大于0.6。
在一些实施例中，所述凸起包括在所述凸起的高度方向相连的连接段和穿刺段，所述连接段与所述连接板相连，所述穿刺段连接在所述连接段的远离所述连接板的一端，其中，在所述凸起高度方向上所述连接段的截面面积相同，所述穿刺段形成为所述穿刺端。
在一些实施例中，所述凸起的高度不大于5mm。
在一些实施例中，在所述凸起的高度方向上，所述穿刺段的高度不大于2mm。
在一些实施例中，在所述凸起的高度方向上，所述穿刺段的截面面积逐渐减小，且所述穿刺段的顶角不大于120°。
在一些实施例中，所述连接段与所述穿刺段平滑过渡。
根据本发明第三方面的连接件，所述连接板有多个所述凸起，多个所述凸起在所述连接板上间隔设置，多个所述凸起穿过多层所述极耳，在所述凸起高度方向上，所述凸起的自由端端面形成为平面。
根据本发明的连接件，通过在连接件上设置顶端端面为平面的凸起，凸起易于刺穿多层极耳，焊接能量易于穿透连接件和多层极耳，降低了极耳的焊接难度，简化了工人的焊接过程，减少了制作工时，降低了人工成本，提高了极耳与连接件之间的连接强度，保证了电池单体的可靠性，降低了故障率，提升了电池单体的安全系数，保证了电池单体的使用安全，避免了安全隐患，减少了危险事故的发生。
在一些实施例中，在所述凸起高度方向上，所述凸起的截面面积相同。
在一些实施例中，所述凸起的截面面积不大于5mm 2。
在一些实施例中，所述凸起垂直于凸出高度的截面形状为圆形、椭圆形或多边形。
进一步地，所述凸起的截面面积与所述凸起的高度的比值不大于5。
进一步地，所述凸起的截面形状形成为圆形，所述凸起的半径不大于3mm。
进一步地，所述凸起的截面形状形成为正方形，且所述凸起截面的边长不大于3mm。
更进一步地，所述凸起截面的边长与所述凸起的高度之间的比值不大于1。
根据本发明第四方面的连接件，所述连接件用于通过超声波焊接与多层极耳相连，所述连接板有多个所述凸起，多个所述凸起穿过多层所述极耳，多个所述凸起在超声波振动方向上排列的密集程度大于除超声波振动方向外的其他方向的密集程度。
根据本发明的连接件，通过在连接件上设置在超声波振动方向上排列的密集程度大于除超声波振动方向外的其他方向的密集程度的多个凸起，提升了极耳与连接件之间的焊接速度，减少了制作工时，降低了电池单体的生产成本，提高了电池包的生产效率。
在一些实施例中，在超声波振动方向上相邻的两个凸起之间的间距为L1，在垂直于超声波振动方向上相邻两个所述凸起之间的间距为L2，其中，L1和L2满足：0.5mm≤L1≤10mm，0.5mm≤L2≤10mm，且L1≤L2。
进一步地，多个所述凸起在所述连接板的表面沿超声波振动方向延伸且在垂直于超声波振动的方向上间隔布置。
进一步地，在垂直于超声波振动的方向上，相邻两个所述凸起之间的间距L2不小于所述凸起的宽度d。
更进一步地，所述凸起在所述超声波振动方向的长度为L，所述凸起在垂直于超声波振动方向上的宽度为d，其中，L和d满足：L*2+d*2≥X/4，X为极耳的宽度。
根据本发明第五方面的电池单体，包括：极片，所述极片包括多个极耳和集流体，所述多个极耳层叠设置；导电连接组件，所述导电连接组件包括上述第一方面的连接件，所述连接件的多个所述凸起穿过多层所述极耳并与所述极耳电连接。
根据本发明的电池单体，通过将设置上述第一方面的连接件的导电连接组件应用至电池单体，从而降低了电池单体的装配难度，减少了电池单体的制作工时，降低了人工成本，保证了电池单体的可靠性。
在一些实施例中，所述极片包括：支撑绝缘层和分别覆盖在所述支撑绝缘层厚度方向两侧表面的第 一导电层和第二导电层。
根据本发明第六方面的电池包，包括上述第五方面的电池单体。
根据本发明的电池包，通过设置上述第五方面的电池单体，从而提升了电池包的安全性能，保证了电池包的可靠性，避免了危险的发生。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是根据本发明第一方面实施例的导电连接组件的示意图；
图2是图1中所示的导电连接组件的侧视图的示意图；
图3是图1中所示的连接件的示意图；
图4是图3中所示的连接件的侧视图的示意图；
图5是图4中所示的凸起的局部放大图；
图6是图1中所示的另一实施例的连接件的示意图；
图7是图1中所示的又一实施例的连接件的示意图；
图8是图1中所示的连接件的示意图，其中，凸起形成为圆锥体；
图9是图8中所示的连接件的侧视图的示意图；
图10是图1中所示的再一实施例的连接件的示意图；
图11是图10中所示的连接件的侧视图的示意图；
图12是图1中所示的连接件的示意图，其中，凸起包括连接段和穿刺段；
图13是图12中所示的连接件的侧视图的示意图；
图14是图1中所示的连接件的示意图，其中，凸起形成为棱锥体；
图15是图14中所示的连接件的侧视图的示意图；
图16是图1中所示的一个具体实施例的连接件的示意图；
图17是图16中所示的连接件的侧视图的示意图；
图18是图16中所示的导电连接组件的侧视图的示意图；
图19是根据本发明第五方面实施例的电池单体的示意图；
图20是图19中所示的连接件的示意图；
图21是图20中所示的连接件的俯视图的示意图；
图22是另一个实施例的电池单体的示意图；
图23是图22中所示的连接件的示意图；
图24是图23中所示的连接件的俯视图的示意图；
图25是又一个实施例的电池单体的示意图；
图26是图25中所示的连接件的示意图；
图27是图26中所示的连接件的俯视图的示意图；
图28是集流体的示意图。
附图标记：
导电连接组件100，连接件101，连接板1011，
凸起1012，保护板201，
集流体202，极片2021，极耳20211，
第一导电层202111，第二导电层202112，支撑绝缘层202113，
电池单体1000。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
首先，参考图1-图28对根据本发明第五方面实施例的电池单体1000进行简单描述，所述电池单体1000包括根据本发明实施例的连接件101。
根据本发明实施例的电池单体1000，包括：极片2021和导电连接组件100。
具体地，如图1-图28所示，电池单体1000包括：极片2021和导电连接组件100，极片2021包括多个极耳20211和集流体202，多个极耳20211层叠设置，导电连接组件100包括本发明实施例的连接件101，连接件101包括连接板1011和设于连接板1011的凸起1012。凸起1012穿过多层极耳20211并与极耳20211电连接。也就是说，电池单体1000具有极片2021和导电连接组件100，极片2021具有集流体202和多个极耳20211，导电连接组件100具有连接件101，连接件101为本发明实施例所述的连接件101，连接件101包括连接板1011和凸起1012，凸起1012位于连接板1011上。由此，电池单体1000的结构简单，极耳20211与连接件101的连接方式简单，连接稳定性好。多个极耳20211可以是指两个极耳20211或多于两个极耳20211。
电池单体1000可包括至少两个极片2021，其中一个为正极片，另一个为负极片。层叠设置的多个极耳20211的形成方式可以是将一个极片板材卷绕并使极片板材上的多个极耳20211层叠设置，也可以是利用多个极片板材层叠设置并使每个极片板材上的极耳20211对齐，而最后形成层叠设置的多个极耳20211。
在本发明的一些实施例中，极片2021包括：支撑绝缘层202113和分别覆盖在支撑绝缘层202113厚度方向两侧表面的第一导电层202111和第二导电层202112。参照图28所示，支撑绝缘层202113位于第一导电层202111和第二导电层202112之间，第一导电层202111和第二导电层202112分别覆盖在支撑绝缘层202113的上层表面和下层表面上。具体地，支撑绝缘层202113可为高分子层，由于高分子抗压强度较低，在利用超声波焊接时，超声波无法传导到底部的多层极耳20211上，在没有凸起的状态下焊接时摩擦力不够，导致虚焊而引起焊接不可靠的现象。在本发明的实施例中，由于加入了多个凸起1012，可以增加焊接时摩擦力，改善虚焊而导致焊接不可靠的现象。
下面参考图1-图28描述根据本发明第一方面实施例的连接件101。
如图3所示，根据本发明第一方面实施例的连接件101，包括：连接板1011和凸起1012。
具体地，连接件101用于电连接极片2021的多层极耳20211，连接件101包括：连接板1011和设于连接板1011上的凸起1012，凸起1012凸出于连接板1011在厚度方向的其中一侧表面，连接板1011有多个凸起1012，多个凸起1012在连接板1011上间隔设置，多个凸起1012穿过多层极耳20211。也就是说，极片2021的多层极耳20211通过连接件101进行电连接，连接件101具有连接板1011和多个凸起1012，多层极耳20211被多个凸起1012穿过，多个凸起1012间隔设置于连接板1011在厚度方向上的一侧表面上，且多个凸起1012朝向背离连接板1011的方向上凸出。
参照图3所示，连接板1011形成为水平延伸的板体形状，多个凸起1012设置于连接板1011的上表面，且多个凸起1012均朝向上凸出，每个凸起1012在水平方向上均匀间隔设置，每个凸起1012均穿过多层极耳20211。由此，提高了极耳20211与连接件101之间的连接强度，连接稳固，保证了电池单体1000的可靠性。
根据本发明实施例的连接件101，通过在连接件101上设置凸起1012，连接件101易于与极耳20211连接，焊接能量易于穿透连接件101和极耳20211，降低了极耳20211的焊接难度，简化了工人的焊接过程，减少了制作工时，降低了人工成本，提高了极耳20211与连接件101之间的连接强度，连接稳固，保证了电池单体1000的可靠性。
在本发明的一些实施例中，连接板1011与多个凸起1012一体成型，这样，减少了连接件101的零部件数量，提高了连接件101的整体的连接强度，提升了连接件101与极耳20211的连接稳定性，降低了连接件101的不良品率，延长了连接件101的使用寿命。
在本发明的另一些实施例中，连接板1011与多个凸起1012采用分体设置，多个凸起1012通过焊接、粘接、插接或卡接于连接板1011上，这样，连接板1011与凸起1012为两个独立的部件，降低了连接件101的生产难度，减少了连接件101的生产成本，提高了连接件101与极耳20211焊接过程中的容错率。
优选地，多个凸起1012通过焊接的方式与连接板1011相连，连接方式简单，且凸起1012与连接板1011连接稳固，不易损坏。
具体地，多个凸起1012可以通过电磁脉冲焊接的方式与连接板1011相连；多个凸起1012也可以通过摩擦焊接的方式与连接板1011相连；多个凸起1012还可以通过超声波焊接的方式与连接板1011相连。
在本发明的一些实施例中，连接件101还包括：凸起板(图未示出)，凸起板固定于连接板1011上，多个凸起1012设于凸起板的背离连接板1011的一侧。也就是说，连接件101包括凸起板和连接板1011，凸起板与连接板1011固定连接，凸起板与多个凸起1012一体成型，并且多个凸起1012形成于凸起板背离连接板1011的一侧表面(例如图4所示上侧表面)。由此，既避免了对连接板1011结构的破坏，又简化了在连接板1011上焊接多个凸起1012的制作工艺。
在本发明的一些实施例中，多个凸起1012在连接板1011的其中一侧表面呈矩阵式布置，阵列排布的多个凸起1012提高了极耳20211与连接件101的连接强度，避免了在运输或者使用过程中极耳20211与连接件101相互脱离，提升了电池单体1000的良品率，增加了凸起1012与每层极耳20211之间的接触面积，增大了过流面积，散热均衡，电池包不易发生故障，降低了使用者的危险系数，提高了使用者的使用感受。
在本发明的一些实施例中，凸起1012在连接板1011的表面上沿直线和/或曲线延伸。也就是说，凸起1012在连接板1011的表面上可以是沿直线延伸，凸起1012在连接板1011的表面上也可以是沿曲线延伸，凸起1012在连接板1011的表面上还可以是先沿直线延伸再沿曲线延伸，或者先沿曲线延伸再沿直线延伸。由此，满足了不同的复合集流体202的焊接需求，提高了极耳20211与连接件101之间的连接强度，扩展了连接件101的使用范围，降低了连接件101的生产成本。
参照图27所示，凸起1012在连接板1011的上表面沿曲线延伸，凸起1012形成为环形，在凸起1012的上部形成有四个凹槽，四个凹槽在凸起1012的上部均匀间隔布置，且四个凹槽在竖直方向上由凸起1012的上端面向下凹陷，增加了凸起1012与每层极耳20211之间的接触面积，增大了过流面积，提高了连接强度。
在本发明的一些实施例中，凸起1012的宽度在0.1mm-3mm范围内，由此，既避免了材料浪费，又能够保证了极耳20211与连接件101的连接稳定性。例如，凸起1012的宽度可以为：0.1mm、0.15mm、0.2mm、0.3mm、0.4mm、0.55mm、0.6mm、0.85mm、1.0mm、1.1mm、1.2mm、1.3mm、1.35mm、1.4mm、1.5mm、1.6mm、1.7mm、1.8mm、1.9mm、2.0mm、2.1mm、2.2mm、2.3mm、2.45mm、2.6mm、2.7mm、2.8mm、2.9mm、3.0mm等等。
可选地，凸起1012垂直于凸出高度的横截面可以呈圆形、椭圆形或多边形。
具体地，当凸起1012垂直于凸出高度的横截面为圆形时，凸起1012可以为圆柱形、圆锥形或圆台形等等；当凸起1012垂直于凸出高度的横截面为椭圆形时，凸起1012可以为椭圆柱形、椭圆锥形或椭圆台形等等；当凸起1012垂直于凸出高度的横截面为多边形时，横截面可以为三角形或四边形等等，凸起1012可以为三棱锥形、三棱柱形、四棱锥形、四棱柱形、五棱锥形、六棱锥形等等。
在本发明的一些实施例中，凸起1012凸出于连接板1011的高度在0.1mm到3mm范围，这样，既避免了材料的浪费，又能够保证了极耳20211与连接件101的连接强度，以及电池单体1000的整体结构便于装配成为电池包，节省了安装空间，使得结构紧凑，缩小了电池包的体积，降低了运输成本。
例如，凸起1012凸出于连接板1011的高度可以为：0.1mm、0.15mm、0.2mm、0.4mm、0.55mm、0.6mm、0.85mm、1.0mm、1.1mm、1.2mm、1.35mm、1.4mm、1.5mm、1.6mm、1.7mm、1.8mm、2.0mm、2.2mm、2.45mm、2.6mm、2.7mm、2.8mm、2.9mm、3.0mm等等。
在本发明的一些实施例中，连接板1011与凸起1012采用相同的材料制成。由于材质不同，导体的耐温和电阻等参数也不相同，存在较大的安全隐患，而使用相同的材质，则保证了电池单体1000的可靠性，降低了故障率，也保证了电池包的使用安全性，避免了事故的发生。
可选地，连接板1011采用T2纯铜或铜合金等等。
在一些实施例中，连接件101可以通过超声波焊接与多层极耳20211相连，连接件101包括：连接板1011和设于连接板1011上的凸起1012，凸起1012凸出于连接板1011在厚度方向的其中一侧表面，连接板1011有多个凸起1012，多个凸起1012穿过多层极耳20211，多个凸起1012在超声波振动方向上排列的密集程度大于除超声波振动方向外的其他方向的密集程度。
也就是说，多层极耳20211通过超声波焊接与连接件101相连，连接件101具有连接板1011和多个凸起1012，多层极耳20211被多个凸起1012穿过，多个凸起1012间隔设置于连接板1011在厚度方向上的一侧表面上，且多个凸起1012朝向背离连接板1011的方向上凸出，多个凸起1012在超声波振动方向上排列的密集程度最大，多个凸起1012在除了超声波振动方向外的其他方向上的密集程度小于多个凸起1012在超声波振动方向上的密集程度。
使用超声波焊接时，超声波作用于焊接物的接触面会产生每秒几万次的高频振动，沿超声波的振动方向密集排列多个凸起1012，凸起1012易于刺穿多层极耳20211，焊接能量穿透连接件101和极耳20211时更容易，降低了极耳20211与连接件101的焊接难度。
参照图4所示，连接板1011形成为水平延伸的板体形状，多个凸起1012设置于连接板1011的上表面，且多个凸起1012均朝向上凸出，每个凸起1012在水平方向上均匀间隔设置，每个凸起1012均穿过多层极耳20211，多个凸起1012在超声波振动方向上排列的密集程度最大。由此，焊接能量易于穿透连接件101和极耳20211，降低了极耳20211的焊接难度，简化了工人的焊接过程。
在另一些实施例中，在极耳20211的厚度方向上(例如图19所示上下方向上)，多层极耳20211层叠设置，保护板201设置在多层极耳20211的一侧(例如图19所示多层极耳20211的上侧)，连接板1011设置在多层极耳20211的另一侧(例如图19所示多层极耳20211的下侧)，连接板1011与凸起1012的一端(例如图19所示凸起1012的下端)相连，凸起1012刺穿多层极耳20211，并且凸起1012与多层极耳20211电连接，凸起1012的另一端(例如图19所示凸起1012的上端)位于保护板201朝向连接板1011的一层表面内。由此，避免了凸起1012受到损伤，延长了多层极耳20211的使用寿命。
在另一些实施例中，参照图5所示，凸起1012包括两部分：连接段10121和穿刺段10122，凸起1012的下部为连接段10121，凸起1012的上部为穿刺段10122，连接段10121与连接板1011相连，穿刺段10122连接在连接段10121的上端。
具体地，凸起1012的穿刺段10122用于刺穿多层极耳20211，凸起1012的连接段10121用于连接多层极耳20211，这样，焊接能量易于穿透连接件101和极耳20211，降低了极耳20211与连接件101的焊接难度，减少了制作工时，提高了极耳20211与连接件101之间的连接强度，连接稳固，保证了凸起1012的刺穿效果的同时，提升连接强度。
下面将参考图1-图28描述根据本发明一个具体实施例的连接件101。
参照图3，凸起1012形成为长条形，连接件101具有连接板1011和凸起1012，连接板1011有多个凸起1012，每个凸起1012向上凸出于连接板1011的上表面，并且多个凸起1012在连接板1011的上表面为矩阵式布置，凸起1012的长度L为13mm，凸起1012的高度为0.6mm，凸起1012的宽度d为0.6mm，凸起1012在连接板1011的上表面沿直线延伸，连接板1011与多个凸起1012一体成型。
下面参考图1-图21和图28描述根据本发明第二方面实施例的连接件101。
如图3所示，根据本发明第二方面实施例的连接件101，包括：连接板1011和凸起1012。
具体地，连接件101用于电连接多层极耳20211，连接件101包括：连接板1011和凸起1012，凸起1012设于连接板1011上，且凸起1012凸出于连接板1011在厚度方向的其中一侧表面，凸起1012的远离连接板1011的一端形成为穿刺端，穿刺端构造成适于刺穿多层极耳20211。
也就是说，多层极耳20211通过连接件101进行电连接，连接件101具有连接板1011和凸起1012，多层极耳20211被凸起1012穿过，凸起1012设置于连接板1011在厚度方向上的一侧表面上，凸起1012朝向背离连接板1011的方向上凸出，并且在凸起1012远离连接板1011的一端(例如图4所示凸起1012的上端)为穿刺端，多层极耳20211适于被穿刺端穿刺。
参照图3所示，连接板1011形成为水平延伸的板体形状，多个凸起1012设置于连接板1011的上表 面，每个凸起1012在水平方向上均匀间隔设置，且多个凸起1012均朝向上凸出，凸起1012的上端形成为穿刺端，穿刺端的顶端为尖端，穿刺端刺穿每层极耳20211。由此，提高了极耳20211与连接件101之间的连接强度，连接稳固，保证了电池单体1000的可靠性。
根据本发明实施例的连接件101，通过在连接件101上设置具有穿刺端的凸起1012，穿刺端易于刺穿多层极耳20211，焊接能量易于穿透连接件101和多层极耳20211，降低了极耳20211的焊接难度，简化了工人的焊接过程，减少了制作工时，降低了人工成本，提高了极耳20211与连接件101之间的连接强度，连接稳固，保证了电池单体1000的可靠性。
在本发明的一些实施例中，凸起1012形成为圆锥体凸起1012，圆锥体凸起1012的锥顶角度大于5°且小于150°，这样更有利于均衡凸起1012与极耳20211之间连接强度和焊接难度，避免为了保证凸起1012与极耳20211之间的连接强度忽视焊接难度，或者为了降低焊接难度忽视凸起1012与极耳20211之间的连接强度，从而在保证了凸起1012的刺穿效果的同时，提升连接强度。
例如，圆锥体凸起1012的锥顶角度可以为：5°、10°、15°、20°、25°、30°、35°、40°、45°、50°、55°、60°、65°、70°、75°、80°、85°、90°、95°、100°、105°、110°、115°、120°、125°、130°、135°、140°、145°、150°等等。
在本发明的另一些实施例中，凸起1012形成为圆台形凸起1012，圆台形凸起1012的顶面半径与底面半径之间的比值不大于0.6。也就是说，凸起1012的顶面与凸起1012的周面具有一定角度，且凸起1012的顶面面积小于凸起1012的底面的面积。由此，凸起1012的顶面易于刺穿多层极耳20211，保证了凸起1012的刺穿效果，减少了凸起1012在焊接过程中的融化，提升了电池单体1000的可靠性。
例如，凸起1012的顶面半径与底面半径之间的比值可以为：0.6、0.55、0.5、0.45、0.4、0.35、0.3、0.25、0.2、0.15、0.1等等。
在一些实施例中，凸起1012的顶面半径不大于1.5mm，凸起1012的底面半径不大于2.5mm。例如，凸起1012的顶面半径可以为：1.5mm、1.4mm、1.3mm、1.2mm、1.1mm、1.0mm、0.8mm、0.6mm、0.4mm、0.2mm、0.1mm等等；凸起1012的底面半径可以为：2.5mm、2.4mm、2.3mm、2.2mm、2.1mm、2.0mm、1.9mm、1.8mm、1.7mm、1.6mm、1.5mm、1.4mm、1.3mm、1.2mm、1.1mm、1.0mm、0.8mm、0.6mm、0.4mm、0.2mm、0.1mm等等。
在本发明的一些实施例中，凸起1012垂直于延伸方向的截面形成为三角形，在截面内，穿刺端的角度不大于120°。也就是说，凸起1012可以为棱柱体。截面为三角形的凸起1012更易于刺穿多层极耳20211，凸起1012的刺穿效果能够得到保证，且穿刺端的角度不大于120°，能够进一步保证凸起1012的刺穿效果，进一步降低极耳20211与连接件101的焊接难度。
例如，在凸起1012垂直于延伸方向的截面内，穿刺端的角度可以为：5°、10°、15°、20°、25°、30°、35°、40°、45°、50°、55°、60°、65°、70°、75°、80°、85°、90°、95°、100°、105°、110°、115°、120°等等。
在本发明的另一些实施例中，在凸起1012延伸方向上的截面形成为三角形，在截面内，穿刺端的角度不大于120°。也就是说，凸起1012可以棱锥体，凸起1012也可以为圆锥体。
例如，在凸起1012延伸方向的截面内，穿刺端的角度可以为：5°、10°、15°、20°、25°、30°、35°、40°、45°、50°、55°、60°、65°、70°、75°、80°、85°、90°、95°、100°、105°、110°、115°、120°等等。
在本发明的又一些实施例中，凸起1012垂直于延伸方向的截面形成为梯形，截面的上底与下底的比值不大于0.6。也就是说，凸起1012也可以为棱台，凸起1012也可以为棱柱，凸起1012还可以为圆台，凸起1012的下底与连接件101相连，凸起1012的上底小于凸起1012的下底，凸起1012的刺穿效果能够得到保证，且截面的上底与下底的比值不大于0.6，能够进一步保证凸起1012的刺穿效果，进一步降低极耳20211与连接件101的焊接难度。
例如，凸起1012的截面的上底与下底的比值可以为：0.6、0.55、0.5、0.45、0.4、0.35、0.3、0.25、0.2、0.15、0.1等等。
在一个实施例中，凸起1012的截面的上底不大于3mm，凸起1012的截面的下底不大于5mm。例如，凸起1012的截面的上底可以为：0.1mm、0.2mm、0.4mm、0.6mm、0.8mm、1.0mm、1.2mm、1.4mm、 1.6mm、1.8mm、2.0mm、2.2mm、2.4mm、2.6mm、2.8mm、3.0mm等等；凸起1012的截面的下底可以为：0.1mm、0.2mm、0.4mm、0.6mm、0.8mm、1.0mm、1.2mm、1.4mm、1.6mm、1.8mm、2.0mm、2.2mm、2.4mm、2.6mm、2.8mm、3.0mm、3.2mm、3.4mm、3.6mm、3.8mm、4.0mm、4.2mm、4.4mm、4.6mm、4.8mm、5.0mm等等。
在本发明的一些实施例中，凸起1012包括在凸起1012的高度方向相连的连接段10121和穿刺段10122，连接段10121与连接板1011相连，穿刺段10122连接在连接段10121的远离连接板1011的一端，其中，在凸起1012高度方向上连接段10121的截面面积相同，穿刺段10122形成为穿刺端。参照图5所示，凸起1012包括两部分：连接段10121和穿刺段10122，凸起1012的下部为连接段10121，凸起1012的上部为穿刺段10122，连接段10121与连接板1011相连，穿刺段10122连接在连接段10121的上端，在如图4所示上下方向上，连接段10121的截面面积相同。
具体地，凸起1012的穿刺段10122用于刺穿多层极耳20211，凸起1012的连接段10121用于连接多层极耳20211，这样，焊接能量易于穿透连接件101和极耳20211，降低了极耳20211与连接件101的焊接难度，减少了制作工时，提高了极耳20211与连接件101之间的连接强度，连接稳固，保证了凸起1012的刺穿效果的同时，提升连接强度。
在本发明的一些实施例中，凸起1012的高度不大于5mm。由此，避免了凸起1012高度过小连接不稳固，又避免了凸起1012高度过大造成了资源浪费。例如，凸起1012的高度可以为：5mm、4.5mm、4mm、3.5mm、3mm、2.5mm、2mm、1.5mm、1mm、0.5mm等等。
在一些实施例中，用户可以根据多层极耳20211的厚度选择高度适合的凸起1012。
进一步地，在凸起1012的高度方向上，穿刺段10122的高度不大于2mm。例如，穿刺段10122的高度可以为：2mm、1.8mm、1.6mm、1.4mm、1.2mm、1mm、0.8mm、0.6mm、0.4mm、0.2mm等等。由此，保证了凸起1012的刺穿效果，降低了极耳20211与连接件101的焊接难度，减少了制作工时，提高了焊接效率。
更进一步地，在凸起1012的高度方向上，连接段10121的高度不大于3mm。连接段10121的高度可以为：3mm、2.8mm、2.6mm、2.4mm、2.2mm、2mm、1.8mm、1.6mm、1.4mm、1.2mm、1mm、0.8mm、0.6mm、0.4mm、0.2mm等等。由此，提高了极耳20211与连接件101之间的连接强度，极耳20211与连接件101不易发生脱离，提高了良品率。
在本发明的一些实施例中，在凸起1012的高度方向上，穿刺段10122的截面面积逐渐减小，且穿刺段10122的顶角不大于120°。参照图5所示，在凸起1012的上下方向上，穿刺段10122的截面面积在从下往上的方向上逐渐减小，穿刺段10122底面的截面面积最大，穿刺段10122顶部的截面面积最小，凸起1012更容易刺穿多层极耳20211，降低了极耳20211与连接件101的焊接难度，减少了极耳20211与连接件101的焊接时长，提高了生产效率。
在本发明的一些实施例中，连接段10121与穿刺段10122平滑过渡。由于焊接过程中，极耳20211与凸起1012产生摩擦，连接段10121与穿刺段10122平滑过渡的凸起1012不易损伤极耳20211，延长了极耳20211的使用寿命，保证了电池单体1000的良品率，提高了电池包的安全可靠性。
在一些实施例中，连接板1011与凸起1012采用相同的材料制成。由于材质不同，导体的耐温和电阻等参数也不相同，存在较大的安全隐患，而使用相同的材质，则保证了电池单体1000的可靠性，降低了故障率，也保证了电池包的使用安全性，避免了事故的发生。
可选地，连接板1011采用T2纯铜或铜合金等等。
在一些实施例中，凸起1012的宽度在0.1mm-3mm范围内，由此，既避免了材料浪费，又能够保证了极耳20211与连接件101的连接稳定性。例如，凸起1012的宽度可以为：0.1mm、0.15mm、0.2mm、0.3mm、0.4mm、0.55mm、0.6mm、0.85mm、1.0mm、1.1mm、1.2mm、1.3mm、1.35mm、1.4mm、1.5mm、1.6mm、1.7mm、1.8mm、1.9mm、2.0mm、2.1mm、2.2mm、2.3mm、2.45mm、2.6mm、2.7mm、2.8mm、2.9mm、3.0mm等等。
可选地，凸起1012垂直于凸出高度的横截面可以呈圆形、椭圆形或多边形。
具体地，当凸起1012垂直于凸出高度的横截面为圆形时，凸起1012可以为圆锥形或圆台形等等； 当凸起1012垂直于凸出高度的横截面为椭圆形时，凸起1012可以为椭圆锥形或椭圆台形等等；当凸起1012垂直于凸出高度的横截面为多边形时，横截面可以为三角形、四边形、五边形或六边形等等，凸起1012可以为三棱锥形、三棱柱形、四棱锥形、四棱柱形、五棱锥形、六棱锥形等等。
下面将参考图1-图21和图28描述根据本发明一个具体实施例的连接件101。
参照图3，凸起1012形成为长条形，连接件101具有连接板1011和凸起1012，凸起1012向上凸出于连接板1011的上表面，并且凸起1012在连接板1011的上表面为矩阵式布置，连接板1011的厚度为0.8mm，凸起1012的长度L为13mm，凸起1012的宽度d为0.6mm，凸起1012的连接段10121的高度为0.4mm，凸起1012的穿刺段10122的高度为0.2mm，穿刺段10122的顶角的角度为67°，连接段10121在上下方向上的截面积相同，穿刺段10122在从下往上的方向上截面积逐渐减小，凸起1012在连接板1011的上表面沿直线延伸，连接板1011与凸起1012一体成型。
下面参考图1、图3、图19、图23至图28描述根据本发明第三方面实施例的连接件101。
如图1所示，根据本发明第三方面实施例的连接件101，包括：连接板1011和凸起1012。
具体地，连接件101用于电连接多层极耳20211，连接件101包括：连接板1011和凸起1012，凸起1012设于连接板1011上，且凸起1012凸出于连接板1011在厚度方向的其中一侧表面，连接板1011有多个凸起1012，多个凸起1012在连接板1011上间隔设置，多个凸起1012穿过多层极耳20211，在凸起1012高度方向上，凸起1012的自由端端面形成为平面。
也就是说，多层极耳20211通过连接件101进行电连接，连接件101具有连接板1011和凸起1012，多层极耳20211被凸起1012穿过，凸起1012设置于连接板1011在厚度方向上的一侧表面上，凸起1012朝向背离连接板1011的方向凸出，连接板1011有多个凸起1012，多个凸起1012在连接板1011上间隔设置，多个凸起1012穿过多层极耳20211，在凸起1012的高度方向上(例如图23所示上下方向)，凸起1012的自由端(例如图23所示凸起1012的顶端)端面为平面。
参照图所示，连接板1011形成为水平延伸的板体形状，多个凸起1012设置于连接板1011的上表面，每个凸起1012在水平方向上均匀间隔设置，且多个凸起1012均朝向上凸出，每个凸起1012在水平方向上均匀间隔设置，每个凸起1012均穿过多层极耳20211，在每个凸起1012的上下方向上，每个凸起1012的顶端均形成为平面。由此，提高了极耳20211与连接件101之间的连接强度，连接稳固，保证了电池单体1000的可靠性。
根据本发明实施例的连接件101，通过在连接件101上设置顶端端面为平面的凸起1012，凸起1012易于刺穿多层极耳20211，焊接能量易于穿透连接件101和多层极耳20211，降低了极耳20211的焊接难度，简化了工人的焊接过程，减少了制作工时，降低了人工成本，提高了极耳20211与连接件101之间的连接强度，保证了电池单体1000的可靠性，降低了故障率，提升了电池单体1000的安全系数，保证了电池单体1000的使用安全，避免了安全隐患，减少了危险事故的发生。
在本发明的一些实施例中，在凸起1012高度方向上，凸起1012的截面面积相同。参照图23所示，凸起1012从下往上的方向上截面积不变，由此，确保了凸起1012与每层极耳20211之间的连接面积大体一致，由于接触面积不同，极耳20211与凸起1012之间的电阻和电流等参数也不同，避免了存在安全隐患。
在本发明的一些实施例中，凸起1012的截面面积不大于5mm 2。若截面积过大，则会影响凸起1012穿刺多层极耳20211，焊接能量不易穿透连接件101和极耳20211，增加了极耳20211与连接件101的焊接难度，若截面积过小，则减少了每个凸起1012与每层极耳20211的有效接触面积，增大了电池单体1000的使用风险。
例如，凸起1012的截面面积可以为：5mm 2、4.5mm 2、4mm 2、3.5mm 2、3mm 2、2.5mm 2、2mm 2、1.5mm 2、1mm 2、0.5mm 2等等。由此，保证了极耳20211与连接件101之间的连接强度，也保证了极耳20211与连接件101之间的接触面积，降低了极耳20211与连接片之间的焊接难度，降低了故障率，保证了电池包的使用安全，避免了使用过程中的安全隐患。
在本发明的一些实施例中，凸起1012垂直于凸出高度的截面形状为圆形、椭圆形或多边形。当凸起1012垂直于凸出高度的截面形状为圆形时，凸起1012可以为圆柱形；当凸起1012垂直于凸出高度的截 面形状为椭圆形时，凸起1012可以为椭圆柱形；当凸起1012垂直于凸出高度的截面形状为多边形时，截面可以为三角形、四边形、五边形或六边形等等，凸起1012可以为三棱柱、四棱柱、五棱柱或六棱柱等等。
在本发明的一些实施例中，凸起1012的截面面积与凸起1012的高度的比值不大于5。这样，更有利于均衡凸起1012与极耳20211之间连接强度和焊接难度，避免为了保证凸起1012与极耳20211之间的连接强度忽视焊接难度，或者为了降低焊接难度忽视凸起1012与极耳20211之间的连接强度，从而在保证了凸起1012的刺穿效果的同时，提升连接强度。
例如，凸起1012的截面面积与凸起1012的高度的比值可以为：5、4.5、4、3.5、3、2.5、2、1.5、1、0.5等等。
在本发明的一个实施例中，凸起1012的截面形状形成为圆形，凸起1012的半径不大于3mm。例如，凸起1012的半径可以为：0.1mm、0.15mm、0.2mm、0.4mm、0.55mm、0.6mm、0.85mm、1.0mm、1.1mm、1.2mm、1.35mm、1.4mm、1.5mm、1.6mm、1.7mm、1.8mm、2.0mm、2.2mm、2.45mm、2.6mm、2.7mm、2.8mm、2.9mm、3.0mm等等。
在本发明的另一个实施例中，凸起1012的截面形状形成为正方形，且凸起1012截面的边长不大于3mm。例如，凸起1012截面的边长可以为：0.1mm、0.15mm、0.2mm、0.4mm、0.55mm、0.6mm、0.85mm、1.0mm、1.1mm、1.2mm、1.35mm、1.4mm、1.5mm、1.6mm、1.7mm、1.8mm、2.0mm、2.2mm、2.45mm、2.6mm、2.7mm、2.8mm、2.9mm、3.0mm等等。
在本发明的一个实施例中，凸起1012截面的边长与凸起1012的高度之间的比值不大于1。例如，凸起1012截面的边长与凸起1012的高度之间的比值：1、0.9、0.8、0.7、0.6、0.5、0.4、0.3、0.2、0.1等等。
在一些实施例中，连接板1011与凸起1012采用相同的材料制成。由于材质不同，导体的耐温和电阻等参数也不相同，存在较大的安全隐患，而使用相同的材质，则保证了电池单体1000的可靠性，降低了故障率，也保证了电池包的使用安全性，避免了事故的发生。
可选地，连接板1011采用T2纯铜或铜合金等等。
参照图26所示，凸起1012在连接板1011的上表面沿曲线延伸，凸起1012形成为环形，在凸起1012的上部形成有四个凹槽，四个凹槽在凸起1012的上部均匀间隔布置，且四个凹槽在竖直方向上由凸起1012的上端面向下凹陷，增加了凸起1012与每层极耳20211之间的接触面积，增大了过流面积，提高了连接强度。
下面将参考图1、图3、图19、图23至图28描述根据本发明一个具体实施例的连接件101。
参照图3，连接件101具有连接板1011和凸起1012，凸起1012向上凸出于连接板1011的上表面，并且凸起1012在连接板1011的上表面为矩阵式布置，连接板1011的厚度为0.8mm，凸起1012的长度L为13mm，凸起1012的宽度d为0.6mm，凸起1012的高度为0.6mm，凸起1012在上下方向上的截面积相同，凸起1012在连接板1011的上表面沿直线延伸，连接板1011与凸起1012一体成型。
下面参考图1-图28描述根据本发明第四方面实施例的连接件101。
如图3所示，根据本发明第四方面实施例的连接件101，包括：连接板1011和凸起1012。
具体地，连接件101用于通过超声波焊接与多层极耳20211相连，连接件101包括：连接板1011和设于连接板1011上的凸起1012，凸起1012凸出于连接板1011在厚度方向的其中一侧表面，连接板1011有多个凸起1012，多个凸起1012穿过多层极耳20211，多个凸起1012在超声波振动方向上排列的密集程度大于除超声波振动方向外的其他方向的密集程度。
也就是说，多层极耳20211通过超声波焊接与连接件101相连，连接件101具有连接板1011和多个凸起1012，多层极耳20211被多个凸起1012穿过，多个凸起1012间隔设置于连接板1011在厚度方向上的一侧表面上，且多个凸起1012朝向背离连接板1011的方向上凸出，多个凸起1012在超声波振动方向上排列的密集程度最大，多个凸起1012在除了超声波振动方向外的其他方向上的密集程度小于多个凸起1012在超声波振动方向上的密集程度。
使用超声波焊接时，超声波作用于焊接物的接触面会产生每秒几万次的高频振动，沿超声波的振动 方向密集排列多个凸起1012，凸起1012易于刺穿多层极耳20211，焊接能量穿透连接件101和极耳20211时更容易，降低了极耳20211与连接件101的焊接难度。
参照图3所示，连接板1011形成为水平延伸的板体形状，多个凸起1012设置于连接板1011的上表面，且多个凸起1012均朝向上凸出，每个凸起1012在水平方向上均匀间隔设置，每个凸起1012均穿过多层极耳20211，多个凸起1012在超声波振动方向上排列的密集程度最大。由此，焊接能量易于穿透连接件101和极耳20211，降低了极耳20211的焊接难度，简化了工人的焊接过程。
根据本发明实施例的连接件101，通过在连接件101上设置在超声波振动方向上排列的密集程度大于除超声波振动方向外的其他方向的密集程度的多个凸起1012，提升了极耳20211与连接件101之间的焊接速度，减少了制作工时，降低了电池单体1000的生产成本，提高了电池包的生产效率。
这里需要说明的是，当多个凸起1012在超声波振动方向上排列的密度足够大时，凸起1012形成为在超声波振动方向上延伸的长条形。
在本发明的一些实施例中，在超声波振动方向上相邻的两个凸起1012之间的间距为L1，在垂直于超声波振动方向上相邻两个凸起1012之间的间距为L2，其中，L1和L2满足：0.5mm≤L1≤10mm，0.5mm≤L2≤10mm，且L1≤L2。也就是说，在超声波振动方向上相邻的两个凸起1012之间的间距不大于在垂直于超声波振动方向上相邻两个凸起1012之间的间距，即多个凸起1012在垂直于超声波振动方向的方向上排列的密集程度小于超声波振动方向上排列的密集程度。这样，进一步提升了焊接速度，提高了生产效率，降低了生产成本，优化了凸起1012的排列方式，避免了极耳20211与连接件101之间存在不牢固的焊接点，提高了产品质量。
例如，在超声波振动方向上相邻的两个凸起1012之间的间距L1可以为：0.5mm、0.7mm、0.9mm、1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm、5mm、5.5mm、6mm、6.5mm、7mm、7.5mm、8mm、8.5mm、9mm、9.5mm、10mm等等。在垂直于超声波振动方向上相邻两个凸起1012之间的间距L2可以为：0.5mm、0.7mm、0.9mm、1mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm、5mm、5.5mm、6mm、6.5mm、7mm、7.5mm、8mm、8.5mm、9mm、9.5mm、10mm等等。
在本发明的一个实施例中，多个凸起1012在连接板1011的表面沿超声波振动方向延伸且在垂直于超声波振动的方向上间隔布置。参照图3所示，多个凸起1012在连接板1011的上表面沿超声波的振动方向延伸，并且在垂直于超声波振动方向的方向上间隔布置，凸起1012形成为长条形，增大了极耳20211与凸起1012之间的接触面积，避免了极耳20211与连接件101焊接不牢固，提高了极耳20211与连接件101之间的连接强度。
在本发明的一些实施例中，在垂直于超声波振动的方向上，相邻两个凸起1012之间的间距L2不小于凸起1012的宽度d。也就是说，在垂直于超声波振动方向的方向上相邻两个凸起1012之间的间距L2大于等于凸起1012的宽度d，L2可以大于d，L2也可以等于d。由此，能够明确区分连接件101焊接时的放置方向，将凸起1012间距较宽的方向朝向垂直于超声波振动方向的方向放置，既能提高生产效率，又能使得凸起1012与极耳20211焊接的更牢固。
在本发明的一些实施例中，凸起1012在超声波振动方向的长度为L，凸起1012在垂直于超声波振动方向上的宽度为d，其中，L和d满足：L*2+d*2≥X/4，X为极耳20211的宽度。可以理解的是，凸起1012四倍的周长应不小于极耳20211的宽度，若凸起1012四倍的周长小于极耳20211的宽度，接触的过流面积较小，过流能力低，温升速度快，安全性低。由此，能够提高凸起1012与极耳20211的连接强度，增大了过流面积，提升了过流能力，降低了温升的速度，提高了连接件101的安全性能。
可选地，L和d可以满足：L*2+d*2≥X/4，L和d也可以满足：L*2+d*2≥X/3，L和d还可以满足：L*2+d*2≥X/2，L和d还可以满足：L*2+d*2≥X等等。
优选地，L和d满足：L*2+d*2≥X，X为极耳20211的宽度。可以理解的是，凸起1012的周长应不小于极耳20211的宽度。这样，进一步提高了凸起1012与极耳20211的连接强度，进一步增大了过流面积，进一步提升了连接件101的过流能力，进一步降低了温升的速度，进一步提高了连接件101的安全性能。
这里需要说明的是，极耳20211的宽度X为极耳20211垂直于超声波振动方向上的边长，参照图16 所示，极耳20211左右方向上的长度为极耳20211的宽度。
下面将参考图1-图28描述根据本发明一个具体实施例的连接件101。
参照图16，凸起1012形成为长条形，连接件101具有连接板1011和凸起1012，连接板1011有多个凸起1012，每个凸起1012向上凸出于连接板1011的上表面，每个凸起1012均形成为长条形在连接板1011的上表面沿直线延伸，并且多个凸起1012在连接板1011的上表面沿超声波振动方向延伸，连接板1011的厚度为0.8mm，连接板1011前后方向上的长度a为80mm，连接板1011左右方向上的长度b为30mm，凸起1012的长度L为13mm，凸起1012的宽度d为0.6mm，凸起1012的高度为0.6mm，相邻两个凸起1012的间距L2为2.4mm，连接板1011与多个凸起1012一体成型。
根据本发明第五方面实施例的电池单体1000，包括极片2021和导电连接组件100，其中，导电连接组件100包括根据本发明上述第一方面、第二方面、第三方面和第四方面任一方面的实施例的连接件101。
根据本发明实施例的电池单体1000，通过将设置上述连接件101的导电连接组件100应用至电池单体1000，从而降低了电池单体1000的装配难度，减少了电池单体1000的制作工时，降低了人工成本，保证了电池单体1000的可靠性。
根据本发明第六方面实施例的电池包，包括根据本发明上述第五方面实施例的电池单体1000。
根据本发明实施例的电池包，通过设置上述第五方面实施例的电池单体1000，从而提升了电池包的安全性能，保证了电池包的可靠性，避免了危险的发生。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接，还可以是通信；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管已经示出和描述了本发明的实施例，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。

Claims (38)

  1. 一种连接件，其特征在于，所述连接件用于电连接极片的多层极耳，所述连接件包括：连接板和设于所述连接板上的凸起，所述凸起凸出于所述连接板在厚度方向的其中一侧表面，所述凸起穿过多层所述极耳。
  2. 根据权利要求1所述的连接件，其特征在于，所述连接板有多个所述凸起，多个所述凸起在所述连接板上间隔设置，多个所述凸起穿过多层所述极耳。
  3. 根据权利要求2所述的连接件，其特征在于，所述连接板与多个所述凸起一体成型。
  4. 根据权利要求2所述的连接件，其特征在于，多个所述凸起通过焊接、粘接、插接或卡接于所述连接板上。
  5. 根据权利要求2-4任一项所述的连接件，其特征在于，所述连接件还包括：凸起板，所述凸起板固定于所述连接板上，多个所述凸起设于所述凸起板的背离所述连接板的一侧。
  6. 根据权利要求2-4任一项所述的连接件，其特征在于，多个所述凸起在所述连接板的所述其中一侧表面呈矩阵式布置。
  7. 根据权利要求1-4任一项所述的连接件，其特征在于，所述凸起在所述连接板的表面上沿直线和/或曲线延伸。
  8. 根据权利要求1-7任一项所述的连接件，其特征在于，所述凸起的宽度在0.1mm-3mm范围内。
  9. 根据权利要求1-8任一项所述的连接件，其特征在于，所述凸起垂直于凸出高度的横截面呈圆形、椭圆形或多边形。
  10. 根据权利要求1-4和6-9任一项所述的连接件，其特征在于，所述凸起凸出于所述连接板的高度在0.1mm到3mm范围。
  11. 根据权利要求1-4和6-10任一项所述的连接件，其特征在于，所述连接板与所述凸起采用相同的材料制成。
  12. 根据权利要求1所述的连接件，其特征在于，所述凸起的远离所述连接板的一端形成为穿刺端，所述穿刺端构造成适于刺穿所述多层极耳。
  13. 根据权利要求12所述的连接件，其特征在于，所述凸起形成为圆锥体凸起，所述圆锥体凸起的锥顶角度大于5°且小于150°。
  14. 根据权利要求12所述的连接件，其特征在于，所述凸起形成为圆台形凸起，所述圆台形凸起的顶面半径与底面半径之间的比值不大于0.6。
  15. 根据权利要求12-14任一项所述的连接件，其特征在于，所述凸起在所述连接板的表面沿直线和/或曲线延伸。
  16. 根据权利要求12或15所述的连接件，其特征在于，所述凸起垂直于延伸方向的截面形成为三角形，在所述截面内，所述穿刺端的角度不大于120°。
  17. 根据权利要求12或15所述的连接件，其特征在于，所述凸起垂直于延伸方向的截面形成为梯形，所述截面的上底与下底的比值不大于0.6。
  18. 根据权利要求12-17任一项所述的连接件，其特征在于，所述凸起包括在所述凸起的高度方向相连的连接段和穿刺段，所述连接段与所述连接板相连，所述穿刺段连接在所述连接段的远离所述连接板的一端，其中，在所述凸起高度方向上所述连接段的截面面积相同，所述穿刺段形成为所述穿刺端。
  19. 根据权利要求18所述的连接件，其特征在于，所述凸起的高度不大于5mm。
  20. 根据权利要求18或19所述的连接件，其特征在于，在所述凸起的高度方向上，所述穿刺段的高度不大于2mm。
  21. 根据权利要求18-20任一项所述的连接件，其特征在于，在所述凸起的高度方向上，所述穿刺段的截面面积逐渐减小，且所述穿刺段的顶角不大于120°。
  22. 根据权利要求18-21任一项所述的连接件，其特征在于，所述连接段与所述穿刺段平滑过渡。
  23. 根据权利要求1所述的连接件，其特征在于，所述连接板有多个所述凸起，多个所述凸起在所述连接板上间隔设置，多个所述凸起穿过多层所述极耳，在所述凸起高度方向上，所述凸起的自由端端面 形成为平面。
  24. 根据权利要求23所述的连接件，其特征在于，在所述凸起高度方向上，所述凸起的截面面积相同。
  25. 根据权利要求23或24所述的连接件，其特征在于，所述凸起的截面面积不大于5mm 2。
  26. 根据权利要求23所述的连接件，其特征在于，所述凸起垂直于凸出高度的截面形状为圆形、椭圆形或多边形。
  27. 根据权利要求26所述的连接件，其特征在于，所述凸起的截面面积与所述凸起的高度的比值不大于5。
  28. 根据权利要求26所述的连接件，其特征在于，所述凸起的截面形状形成为圆形，所述凸起的半径不大于3mm。
  29. 根据权利要求26所述的连接件，其特征在于，所述凸起的截面形状形成为正方形，且所述凸起截面的边长不大于3mm。
  30. 根据权利要求29所述的连接件，其特征在于，所述凸起截面的边长与所述凸起的高度之间的比值不大于1。
  31. 根据权利要求1所述的连接件，其特征在于，所述连接件用于通过超声波焊接与所述多层极耳相连，所述连接板有多个所述凸起，多个所述凸起穿过多层所述极耳，多个所述凸起在超声波振动方向上排列的密集程度大于除超声波振动方向外的其他方向的密集程度。
  32. 根据权利要求31所述的连接件，其特征在于，在超声波振动方向上相邻的两个凸起之间的间距为L1，在垂直于超声波振动方向上相邻两个所述凸起之间的间距为L2，其中，L1和L2满足：0.5mm≤L1≤10mm，0.5mm≤L2≤10mm，且L1≤L2。
  33. 根据权利要求31或32所述的连接件，其特征在于，多个所述凸起在所述连接板的表面沿超声波振动方向延伸且在垂直于超声波振动的方向上间隔布置。
  34. 根据权利要求33所述的连接件，其特征在于，在垂直于超声波振动的方向上，相邻两个所述凸起之间的间距L2不小于所述凸起的宽度d。
  35. 根据权利要求33或34所述的连接件，其特征在于，所述凸起在所述超声波振动方向的长度为L，所述凸起在垂直于超声波振动方向上的宽度为d，其中，L和d满足：L*2+d*2≥X/4，X为极耳的宽度。
  36. 一种电池单体，其特征在于，包括：
    极片，所述极片包括多个极耳和集流体，所述多个极耳层叠设置；
    导电连接组件，所述导电连接组件包括根据权利要求1-35任一项所述的连接件，所述连接件的多个所述凸起穿过多层所述极耳并与所述极耳电连接。
  37. 根据权利要求36所述的电池单体，其特征在于，所述极片包括：支撑绝缘层和分别覆盖在所述支撑绝缘层厚度方向两侧表面的第一导电层和第二导电层。
  38. 一种电池包，其特征在于，包括根据权利要求36或37所述的电池单体。
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05152174A (ja) * 1991-11-27 1993-06-18 Nippon Chemicon Corp コンデンサのリード線タブ接続方法及び接続用金型
CN102856578A (zh) * 2011-06-29 2013-01-02 夏普株式会社 非水系二次电池
TW201322534A (zh) * 2011-11-22 2013-06-01 Metal Ind Res & Dev Ct 電池模組及用於電池模組之超音波銲接方法及裝置
CN205376658U (zh) * 2016-02-29 2016-07-06 宁德时代新能源科技股份有限公司 二次电池
CN113422173A (zh) * 2021-07-14 2021-09-21 厦门海辰新能源科技有限公司 连接件、电池单体和电池包
CN113422167A (zh) * 2021-07-14 2021-09-21 厦门海辰新能源科技有限公司 连接件、电池单体和电池包
CN113422171A (zh) * 2021-07-14 2021-09-21 厦门海辰新能源科技有限公司 连接件、电池单体和电池包
CN113422172A (zh) * 2021-07-14 2021-09-21 厦门海辰新能源科技有限公司 连接件、电池单体和电池包

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05152174A (ja) * 1991-11-27 1993-06-18 Nippon Chemicon Corp コンデンサのリード線タブ接続方法及び接続用金型
CN102856578A (zh) * 2011-06-29 2013-01-02 夏普株式会社 非水系二次电池
TW201322534A (zh) * 2011-11-22 2013-06-01 Metal Ind Res & Dev Ct 電池模組及用於電池模組之超音波銲接方法及裝置
CN205376658U (zh) * 2016-02-29 2016-07-06 宁德时代新能源科技股份有限公司 二次电池
CN113422173A (zh) * 2021-07-14 2021-09-21 厦门海辰新能源科技有限公司 连接件、电池单体和电池包
CN113422167A (zh) * 2021-07-14 2021-09-21 厦门海辰新能源科技有限公司 连接件、电池单体和电池包
CN113422171A (zh) * 2021-07-14 2021-09-21 厦门海辰新能源科技有限公司 连接件、电池单体和电池包
CN113422172A (zh) * 2021-07-14 2021-09-21 厦门海辰新能源科技有限公司 连接件、电池单体和电池包

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