WO2024103595A1 - 压板结构以及焊接机 - Google Patents

压板结构以及焊接机 Download PDF

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Publication number
WO2024103595A1
WO2024103595A1 PCT/CN2023/084728 CN2023084728W WO2024103595A1 WO 2024103595 A1 WO2024103595 A1 WO 2024103595A1 CN 2023084728 W CN2023084728 W CN 2023084728W WO 2024103595 A1 WO2024103595 A1 WO 2024103595A1
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WO
WIPO (PCT)
Prior art keywords
pressing
crimping
plate
welding
sub
Prior art date
Application number
PCT/CN2023/084728
Other languages
English (en)
French (fr)
Inventor
赖忠林
钟光成
宋雷
陈胜东
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP23731080.0A priority Critical patent/EP4393622A1/en
Priority to US18/349,721 priority patent/US20240157488A1/en
Publication of WO2024103595A1 publication Critical patent/WO2024103595A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery processing, and in particular to a pressing plate structure and a welding machine.
  • the present application provides a pressure plate structure and a welding machine, which can improve the quality of tab welding.
  • the present application provides a pressure plate structure, including: a frame; and a pressure block unit, the pressure block unit includes a first pressure connection portion and a second pressure connection portion which are fixedly connected, the first pressure connection portion is movably arranged on the frame along a first direction to approach or move away from an electrode assembly; the second pressure connection portion protrudes downward from the first pressure connection portion along the first direction; a welding hole extending along the first direction is formed on the second pressure connection portion; the second pressure connection portion can be pressure-connected on a pole ear of the electrode assembly, and the welding hole exposes part of the pole ear.
  • the above-mentioned pressure plate structure is provided with a first crimping part and a second crimping part which are fixedly connected; the second crimping part protrudes downward from the first crimping part along the first direction; the first crimping part is movably arranged on the frame along the first direction to approach or move away from the electrode assembly, and by designing the height difference between the first crimping part and the second crimping part, when the first crimping part moves downward to the bottom end along the first direction, the first crimping part abuts against the side surface of the main body of the electrode assembly to prevent the main body from shaking during the welding process; the second crimping part can be crimped on the pole ear of the electrode assembly, thereby preventing the pole ear from shaking during the welding process; the first crimping part and the second crimping part remain relatively fixed without relative displacement, effectively preventing the second crimping part from causing the pole ear to loosen unnecessary during the withdrawal and insertion action
  • the first crimping portion includes a first sub-plate, a transition section and a second sub-plate; the first sub-plate and the second sub-plate are respectively connected to the left and right sides of the transition section, and the length of the transition section is shorter than that of the first sub-plate to form a gap; the second crimping portion is at least partially disposed in the gap.
  • the second crimping portion includes a fixing block and a crimping block
  • the fixing block is detachably connected to the transition section
  • the crimping block is located in the notch
  • the welding hole penetrates the crimping block along the first direction.
  • a convex rib is formed on the bottom surface of the crimping block facing the tab.
  • the ribs are arranged around the welding hole.
  • a first shaping section is formed at the junction of the first side surface of the crimping block near the first sub-plate and the bottom surface of the crimping block facing the pole lug; and/or a second shaping section is formed at the junction of the second side surface of the crimping block near the second sub-plate and the bottom surface of the crimping block facing the pole lug.
  • the platen structure includes a drive mechanism
  • the driving mechanism is fixed on the frame, and is transmission-connected with the first crimping part to drive the first crimping part to move along the first direction toward or away from the electrode assembly.
  • the pressing block unit includes a connecting plate, which is connected to the driving mechanism and connected to a side of the first pressing portion facing away from the electrode assembly.
  • the first crimping portion and the second crimping portion are integrally connected.
  • the present application provides a welding machine, comprising the above pressure plate structure.
  • FIG1 is a three-dimensional schematic diagram of a pressure plate structure according to an embodiment of the present application.
  • FIG2 is a front view of the pressing plate structure of an embodiment of the present application.
  • FIG3 is a side view of the pressure plate structure of an embodiment of the present application.
  • FIG4 is a top view of the pressure plate structure of an embodiment of the present application.
  • FIG5 is a schematic structural diagram of a first crimping portion according to an embodiment of the present application.
  • FIG6 is a schematic structural diagram of a second crimping portion from a first viewing angle according to an embodiment of the present application.
  • FIG7 is a schematic structural diagram of a second crimping portion from a second viewing angle according to an embodiment of the present application.
  • FIG8 is a schematic structural diagram of a second crimping portion from a third viewing angle according to an embodiment of the present application.
  • FIG9 is a schematic diagram of the assembly relationship between the pressing plate structure, the electrode assembly, and the electrode assembly positioning groove according to an embodiment of the present application.
  • FIG10 is a schematic structural diagram of a welding machine according to an embodiment of the present application, wherein the electrode assembly positioning groove is omitted;
  • the X direction in each of the drawings is the first direction in the embodiments of the present application.
  • the reference numerals in the specific implementation manner are as follows: The pressing plate structure 100, the frame 10, the pressing block unit 20, the first pressing portion 21, the first sub-plate 211, the transition section 212, The second sub-plate 213, the notch 214, the process groove 215, the second crimping portion 22, the welding hole 221, the fixing block 222, the process hole 2221, Crimping block 223, rib 224, first side surface 225, bottom surface 226, first shaping section 227, second side surface 228, second shaping section 229, connecting plate 23, driving mechanism 30, first limiting mechanism 31, second limiting mechanism 32, welding head 200, welding seat 210, electrode assembly positioning groove 300, electrode assembly 900, body 910, and pole ear 920.
  • the term "and/or" is only a description of the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.
  • multiple refers to more than two (including two).
  • multiple groups refers to more than two groups (including two groups), and “multiple pieces” refers to more than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.
  • a power battery is often composed of one or more battery cells, each of which can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • a battery cell usually includes one or more electrode assemblies 900 and other functional components.
  • the electrode assembly 900 is a component in the battery cell where electrochemical reactions occur.
  • the electrode assembly 900 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet.
  • the parts of the positive electrode sheet and the negative electrode sheet with active materials are wound to form the body 910 of the electrode assembly 900, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear 920.
  • the portion extending from the negative electrode sheet without active substances may be copper foil or copper-plated nickel foil, which extends in a strip shape, and multiple layers of copper foil or copper-plated nickel foil are compacted and welded to form a negative electrode tab; similarly, the portion extending from the positive electrode sheet without active substances may be aluminum foil, which extends in a strip shape, and multiple layers of aluminum foil are compacted and welded to form a positive electrode tab.
  • the positive electrode tab and the negative electrode tab can be located at one end of the body 910 or at both ends of the body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 920 can be connected to the external electrode terminal to form a current loop.
  • the electrode assembly 900 includes a body 910 and a tab 920. Due to the manufacturing method of the winding process, the body 910 is often flat, and the side of the body 910 is a large battery cell surface 912 with a large area. A multilayer strip material that can form the tab 920 extends from the end face of the body 910. Before the welding process of the tab 920 is performed, the multilayer strip material is a loose structure. During the welding process, one pressing plate is often pressed on the large battery cell surface 912 and a corresponding empty groove is left, while the other pressing plate is moved from the outside to the empty groove alone and pressed on the tab 920 for welding.
  • the distance between the pole ear 920 and the main body 910 can be designed so that the two pressure plates can be pressed on the pole ear 920 to the main body 910 at the same time, thereby pressing the main body 910 and the pole ear 920 at the same time during the welding process to prevent the pole ear 920 and the main body 910 from loosening.
  • the inventor has designed a pressure plate structure after in-depth research, through the first crimping portion 21 and the second crimping portion 22 that are fixedly connected; the second crimping portion 22 is connected along the first direction The first crimping portion 21 protrudes downward; the first crimping portion 21 is movably arranged on the frame 10 along the first direction.
  • the first crimping portion 21 moves downward to the bottom end along the first direction, the first crimping portion 21 contacts the large surface 912 of the battery cell of the main body 910 of the electrode assembly 900 to prevent the main body 910 from shaking during the welding process; the second crimping portion 22 can be crimped on the pole ear 920 of the electrode assembly 900, thereby preventing the pole ear 920 from shaking during the welding process; effectively preventing cold welding and improving welding quality.
  • the pressing plate structure and welding machine disclosed in the embodiments of the present application can be used for welding processing of primary batteries or secondary batteries, but are not limited thereto.
  • Figure 1 is a three-dimensional schematic diagram of the pressure plate structure according to some embodiments of the present application
  • Figures 2 to 4 are structural schematic diagrams of the pressure plate structure according to some embodiments of the present application at different viewing angles
  • Figure 5 is a structural schematic diagram of the first crimping portion according to some embodiments of the present application
  • Figures 6 to 8 are structural schematic diagrams of the second crimping portion according to some embodiments of the present application at different viewing angles
  • Figure 9 is a schematic diagram of the assembly relationship between the pressure plate structure and the electrode assembly and the electrode assembly positioning groove according to some embodiments of the present application.
  • a first aspect of the present application provides a pressing plate structure 100 for welding an electrode assembly 900 .
  • the electrode assembly 900 includes a main body 910 and a pole ear 920 extending from an end surface 911 of the main body 910. It can be understood that the pole ear 920 is a multi-layer strip of loose material before welding. After welding, the various layers of material of the pole ear 920 are tightly connected to each other as a whole, and can be connected to an external electrode terminal to form a current loop.
  • the pressing plate structure 100 includes a frame 10 and a pressing block unit 20 .
  • the pressing block unit 20 includes a first pressing portion 21 and a second pressing portion 22 which are fixedly connected.
  • the second crimping portion 22 protrudes downward from the first crimping portion 21 along the first direction. That is, the second crimping portion 22 is located lower than the bottom surface of the first crimping portion 21 facing the electrode assembly 900 and protrudes from the bottom surface of the first crimping portion 21 as a whole.
  • the first crimping portion 21 is movably disposed on the frame 10 along a first direction to approach or move away from the electrode assembly 900.
  • the first crimping portion 21 contacts the side of the body 910 of the electrode assembly 900, and the second crimping portion 22 can be crimped on the tab 920 of the electrode assembly 900.
  • the first crimping portion 21 contacts the large surface 912 of the battery cell of the body 910 of the electrode assembly 900 to prevent the body 910 from shaking during the welding process;
  • the second crimping portion 22 can be crimped on the tab 920 of the electrode assembly 900, thereby preventing the tab 920 from shaking during the welding process;
  • the first crimping portion 2 1 and the second crimping part 22 are fixedly connected;
  • the first crimping part 21 and the second crimping part 22 are kept relatively fixed without relative displacement, and the pressing block unit 20 is crimped on the electrode assembly 900 as a whole, avoiding the withdrawal and insertion action of the second crimping part 22 during the welding process, which simplifies the welding action, realizes the simplification of the structure, and avoid
  • a welding hole 221 extending along the first direction is formed on the second crimping portion 22; when the second crimping portion 22 is crimped onto the pole ear 920 of the electrode assembly 900, part of the pole ear 920 is compressed by the structure around the welding hole 221, and part of the pole ear 920 is exposed through the welding hole 221; it is convenient for the welding head 200 (mentioned below) to pass through the welding hole 221 to weld the part of the pole ear 920 exposed in the welding hole 221, so that it can ensure that the position of the pole ear 920 is consistent each time it is welded, thereby improving the welding consistency.
  • the first crimping portion 21 and the second crimping portion 22 can be formed by integral processing, with high structural strength and high precision of height difference between them.
  • the first crimping portion 21 and the second crimping portion 22 can be processed separately and then connected by bolts or directly welded, which is simple in process and low in cost.
  • two welding holes 221 are formed on the second crimping portion 22, and the two welding holes 221 are arranged side by side.
  • the body 910 of an electrode assembly 900 has two groups of tabs 920, one of which is a positive tab and the other is a negative tab;
  • a battery cell may include two electrode assemblies 900, the positive tabs of the two electrode assemblies 900 are connected by an adapter (not shown), and the negative tabs of the two electrode assemblies 900 are connected by another adapter; the two welding holes 221 are arranged side by side to expose the positive tabs of the two electrode assemblies 900 at the same time or expose the negative tabs of the two electrode assemblies 900 at the same time, so that the tabs 920 of the two electrode assemblies 900 can be welded in the same welding process to improve the welding efficiency.
  • one welding hole 221, three or more welding holes 221 may be formed on the second crimping portion 22, and the embodiment of the present application
  • the cross-section of the welding hole 221 is rectangular, and in other embodiments, the cross-section of the welding hole 221 may be circular, elliptical, or triangular.
  • the X direction is the first direction, which can usually be a vertical direction.
  • the first direction can also be other directions, and the present application does not limit this.
  • the first crimping portion 21 includes a first sub-plate 211 , a transition section 212 and a second sub-plate 213 .
  • the first sub-plate 211 and the second sub-plate 213 can be integrally connected via the transition section 212.
  • the length, width, thickness, and shape of the first sub-plate 211 and the second sub-plate 213 are usually equal and symmetrically designed. However, in some other embodiments, the length, width, thickness, and shape of the first sub-plate 211 and the second sub-plate 213 may also be unequal, which is not limited in the embodiment of the present application.
  • the first sub-plate 211 and the second sub-plate 213 are connected to the left and right sides of the transition section 212 respectively, and the length of the transition section 212 is shorter than that of the first sub-plate 211; the length of the transition section 212 is shorter than that of the second sub-plate 213; thus, a gap 214 can be formed between the first sub-plate 211 and the second sub-plate 213.
  • the gap 214 is usually in a half-mouth shape, and can also be designed as a semicircle or other shapes as needed.
  • the second crimping portion 22 is at least partially disposed in the notch 214 .
  • the first crimping portion 21 contacts the electrode assembly 900; the first sub-plate 211 and the second sub-plate 213 are respectively crimped onto the large surface 912 of the battery cell of the body 910 of each electrode assembly 900 to prevent the body 910 from shaking during the welding process; the position of the notch 214 is just above the tabs 920 of the two electrode assemblies 900, so that The second crimping portion 22 can be crimped onto the tabs 920 of the two electrode assemblies 900 at the same time, and the welding head 200 can pass through the notch 214 and the welding hole 221 in sequence to weld the tabs 920 .
  • the first crimping portion 21 is generally an aluminum plate or a carbon steel plate or a stainless steel plate. Referring to FIG. 5 , a process groove 215 is formed on the bottom surface of the first crimping portion 21 to cooperate with other structures to avoid interference and also to achieve weight reduction.
  • the second crimping portion 22 includes a fixing block 222 and a crimping block 223 .
  • the fixing block 222 is detachably connected to the transition section 212 .
  • the bottom surfaces of the first sub-plate 211, the second sub-plate 213 and the transition section 212 are usually at the same horizontal plane height, and the fixing block 222 is fixed on the bottom surface of the transition section 212 facing the electrode assembly 900. In this way, the fixing block 222 can be protruded downward by a certain distance along the first direction with the bottom of the transition section 212 as the origin. The distance can be determined by designing the thickness of the fixing block 222, which has the advantage of good processability.
  • the fixing block 222 and the transition section 212 are connected by bolts, which is convenient for disassembly and maintenance.
  • the first crimping portion 21 When the first crimping portion 21 is in contact with the electrode assembly 900; the first sub-plate 211 and the second sub-plate 213 are respectively crimped onto the large surface 912 of the battery cell of the main body 910 of the two electrode assemblies 900, and the position corresponding to the notch 214 is just above the pole ears 920 of the two electrode assemblies 900.
  • the fixed block 222 and the transition section 212 are detachably connected, and the crimping block 223 is located in the notch 214.
  • the welding hole 221 passes through the crimping block 223 along the first direction.
  • the number of welding holes 221 on the crimping block 223 can be two to correspond to the two electrode assemblies 900.
  • the crimping block 223 can be crimped onto the pole ears 920 of the two electrode assemblies 900 at the same time, and the welding head 200 can pass through the notch 214 and the welding hole 221 in turn to weld the pole ears 920.
  • the fixing block 222 and the crimping block 223 are connected in one piece; stainless steel or aluminum can be used for processing in one piece, with good connection strength and small dimensional deviation. In some other embodiments, the fixing block 222 and the crimping block 223 are processed separately and then fixedly connected by welding or bolts.
  • a plurality of process holes 2221 are provided on the fixing block 222 , so as to reduce the weight of the second crimping portion 22 as much as possible without affecting the structural strength, thereby reducing the weight of the entire welding machine.
  • a convex rib 224 is formed on the bottom surface 226 of the crimping block 223 facing the tab 920 .
  • the first crimping portion 21 When the first crimping portion 21 is in contact with the electrode assembly 900; the first sub-plate 211 and the second sub-plate 213 are respectively crimped onto the large surface 912 of the battery cell of the main body 910 of the two electrode assemblies 900, the position corresponding to the notch 214 is just above the pole ears 920 of the two electrode assemblies 900, and the crimping block 223 is located in the notch 214.
  • the crimping block 223 is crimped onto the pole ears 920 of the electrode assembly 900.
  • the convex rib 224 formed on the bottom surface 226 of the crimping block 223 facing the pole ears 920 can effectively reduce the contact area between the crimping block 223 and the pole ears 920.
  • the pressure per unit area is increased, so that the crimping block 223 is more stable when crimping the pole ears 920 to prevent it from loosening.
  • the welding hole 221 penetrates the crimping block 223 along the first direction, and the welding head 200 can pass through the notch 214 and the welding hole 221 in sequence to weld the pole ears 920; thereby avoiding cold welding and improving welding quality.
  • the ribs 224 are arranged around the welding hole 221 , so that the area around the welding hole 221 is more stably pressed on the tab 920 to avoid loosening.
  • the convex rib 224 may also be arranged in multiple straight lines, which is not limited in the embodiment of the present application.
  • a first shaping section 227 is formed at the junction of the first side surface 225 of the crimping block 223 close to the first sub-plate 211 and the bottom surface 226 of the crimping block 223 facing the tab 920.
  • a second shaping section 229 is formed at the junction of the second side surface 228 of the crimping block 223 close to the second sub-plate 213 and the bottom surface 226 of the crimping block 223 facing the tab 920.
  • the first shaping section 227 and the second shaping section 229 may be inclined surfaces or smooth curved surfaces.
  • the first crimping portion 21 abuts against the electrode assembly 900; the first sub-plate 211 and the second sub-plate 213 are respectively crimped on the large surface 912 of the battery cell of the body 910 of the two electrode assemblies 900, and the crimping block 223 is crimped on the pole ear 920 of the two electrode assemblies 900, the first shaping section 227 and the second shaping section 229 move downward along the first direction until they abut against the root area of the pole ear 920 and the body 910; it should be understood that the pole ear 920 is a multi-layer loose structure before welding, and the root of the pole ear 920 has more gaps and is difficult to be crimped by the bottom surface of the crimping block 223.
  • first side surface 225 and the bottom surface 226 are formed as a sharp right-angle structure
  • the second side surface 228 and the bottom surface 226 are formed as a sharp right-angle structure, which is directly squeezed on the multi-layer structure of the pole ear 920, resulting in tearing in the outermost layer of the pole ear 920
  • by setting the first shaping segment 227 and the second shaping segment 229 a smooth arc surface or a transitional inclined surface is formed, providing a shaping function, which can avoid the formation of voids in the pole ear 920, and prevent the pole ear 920 from tearing during welding, thereby effectively improving the welding quality.
  • the pressing plate structure includes a driving mechanism 30 .
  • the driving mechanism 30 is fixed on the frame 10 , and is transmission-connected to the first crimping portion 21 to drive the first crimping portion 21 to move toward or away from the electrode assembly 900 along a first direction.
  • the driving mechanism 30 may be a cylinder or a motor.
  • the action axis (not marked) of the driving mechanism 30 can be provided with a first limiting mechanism 31 and a second limiting mechanism 32 along the first direction.
  • the first limiting mechanism 31 and the second limiting mechanism 32 can be two blocks provided along the first direction for limiting the action length of the driving mechanism 30.
  • the driving mechanism 30 drives the first crimping part 21 to move downward along the first direction until the action axis of the driving mechanism 30 is limited by the first limiting mechanism 31, at which time the first crimping part 21 contacts the electrode assembly 900; the first sub-plate 211 and the second sub-plate 213 are respectively crimped on the large surface 912 of the battery cell of the body 910 of the two electrode assemblies 900, and the crimping block 223 is simultaneously crimped on the tabs 920 of the two electrode assemblies 900, and the welding head 200 can sequentially pass through the notch 214 and the welding hole 221 to weld the tabs 920.
  • the first crimping part 21 is close to the electrode assembly 900.
  • the driving mechanism 30 drives the first crimping portion 21 to move upward along the first direction until the action axis of the driving mechanism 30 is limited by the second limiting mechanism 32.
  • the first sub-plate 211 and the second sub-plate 213 are both away from the large surface 912 of the battery cell of the body 910 of the electrode assembly 900, and the crimping block 223 is also away from the tabs 920 of the two electrode assemblies 900. It is convenient to remove the welded electrode assembly 900 for the next process and to make room for loading a new electrode assembly 900 to be welded.
  • the first limiting mechanism 31 and the second limiting mechanism 32 can be magnetic sensors, and an air regulating valve (not marked) can be connected in series in the air intake chamber of the driving mechanism 30.
  • an air regulating valve (not marked) can be connected in series in the air intake chamber of the driving mechanism 30.
  • the pressing unit 20 includes a connecting plate 23 , which is connected to the driving mechanism 30 , and the connecting plate 23 is connected to a side of the first pressing portion 21 away from the electrode assembly 900 .
  • the action axis of the driving mechanism 30 is connected to the middle part of the connecting plate 23, and the middle part of the connecting plate 23 is fixed on the transition section 212.
  • the two sides of the connecting plate 23 extend to the first sub-plate 211 and the second sub-plate 213 respectively. In this way, it is ensured that the driving mechanism 30 will not deflect when driving the first crimping part 21, thereby ensuring the crimping effect of the pressing block unit 20 on the electrode assembly 900, thereby avoiding the occurrence of cold welding and the like, and improving the welding quality.
  • connection plate 23 and the first sub-plate 211 , and the connection plate 23 and the second sub-plate 213 may be connected by bolts or welding.
  • a second aspect of the present application provides a welding machine, comprising the above-mentioned pressing plate structure 100 .
  • the welding machine of the present application is an ultrasonic welding machine; it may generally include structures such as a welding head 200, a welding seat 210 and an electrode assembly positioning groove 300; the electrode assembly 900 is placed in the electrode assembly positioning groove 300, and the driving mechanism 30 drives the first crimping portion 21 and the second crimping portion 22 to be crimped on the body 910 and the tab 920 of the electrode assembly 900 respectively, and the welding head 200 and the welding seat 210 respectively complete ultrasonic welding of the tab 920 in the vertical direction.

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  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

一种压板结构以及焊接机，包括机架（10）；以及压块单元（20），所述压块单元（20）包括固定连接的第一压接部（21）以及第二压接部（22），所述第一压接部（21）沿第一方向活动设置在所述机架（10）上以靠近或者远离所述电极组件（900）；所述第二压接部（22）沿所述第一方向向下凸出于所述第一压接部（21）；所述第二压接部（22）上形成有沿所述第一方向延伸的焊接孔（221）；当所述第一压接部（21）抵触在所述电极组件（900）的本体侧面上，所述第二压接部（22）能够压接在所述电极组件（900）的极耳（920）上，且所述焊接孔（221）露出部分所述极耳（920）。该压板结构以及焊接机，能够有效地改善极耳（920）焊接的质量。

Description

压板结构以及焊接机
交叉引用
本申请引用于2022年11月16日递交的名称为“压板结构以及焊接机”的第2022230503404号中国专利申请，其通过引用被全部并入本申请。
技术领域
本申请涉及电池加工领域，特别是涉及一种压板结构以及焊接机。
背景技术
电极组件的极耳，在实际加工过程中往往需要通过焊接机将所有铜箔极耳和所有铝箔极耳分别焊接固定，再经过后续的工艺才能完成电极组件加工。
但是由于缺少针对电极组件与极耳的压板结构，导致极耳焊接质量不稳定。
发明内容
鉴于上述问题，本申请提供一种压板结构以及焊接机，能够改善极耳焊接的质量。
第一方面，本申请提供一种压板结构，包括：机架；以及压块单元，压块单元包括固定连接的第一压接部以及第二压接部，第一压接部沿第一方向活动设置在机架上以靠近或者远离电极组件；第二压接部沿第一方向向下凸出于第一压接部；第二压接部上形成有沿第一方向延伸的焊接孔；第二压接部能够压接在电极组件的极耳上，且焊接孔露出部分极耳。
上述压板结构，通过设置固定连接的第一压接部以及第二压接部；第二压接部沿第一方向向下凸出于第一压接部；第一压接部沿第一方向活动设置在机架上，以靠近或者远离电极组件，通过设计好第一压接部与第二压接部之间的高度差，当第一压接部沿第一方向向下移动到最底端，第一压接部抵触在电极组件的本体侧面上，以防止本体在焊接的过程出现晃动；第二压接部能够压接在电极组件的极耳上，从而同时避免极耳在焊接的过程出现晃动；第一压接部与第二压接部之间保持相对固定而不存在相对的位移，有效地防止第二压接部在抽出插入动作过程中带动极耳出现不必要的松动，有效地防止虚焊，提高焊接质量。
在一些实施例中，第一压接部包括第一子板、过渡段以及第二子板；第一子板以及第二子板分别连接在过渡段的左右两侧，过渡段的长度短于第一子板以形成缺口；第二压接部至少部分设置在缺口中。
在一些实施例中，第二压接部包括固定块以及压接块，固定块与过渡段可拆卸连接，压接块位于缺口中，焊接孔沿第一方向贯穿压接块。
在一些实施例中，压接块面向极耳的底面上形成有凸筋。
在一些实施例中，凸筋环绕布置在焊接孔的四周。
在一些实施例中，压接块靠近第一子板的第一侧面与压接块面向极耳的底面的交界处形成有第一整形段；和/或，压接块靠近第二子板的第二侧面与压接块面向极耳的底面的交界处形成有第二整形段。
在一些实施例中，压板结构包括驱动机构；
驱动机构固定在机架上，驱动机构与第一压接部传动连接，以驱动第一压接部沿第一方向活动靠近或者远离电极组件。
在一些实施例中，压块单元包括连接板，连接板与驱动机构连接，连接板连接在第一压接部背离电极组件的一面。
在一些实施例中，第一压接部以及第二压接部一体连接。
第二方面，本申请提供一种焊接机，包括如上的压板结构。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1为本申请实施例的压板结构的三维示意图；
图2为本申请实施例的压板结构的正视图；
图3为本申请实施例的压板结构的侧视图；
图4为本申请实施例的压板结构的俯视图；
图5为本申请实施例的第一压接部的结构示意图；
图6为本申请实施例的第二压接部的第一视角的结构示意图；
图7为本申请实施例的第二压接部的第二视角的结构示意图；
图8为本申请实施例的第二压接部的第三视角的结构示意图；
图9为本申请实施例的压板结构与电极组件、电极组件定位槽的装配关系示意图；
图10为本申请实施例的焊接机的结构示意图，其中省略了电极组件定位槽；
各附图中的X方向为本申请实施例中的第一方向。
具体实施方式中的附图标号如下：
压板结构100、机架10、压块单元20、第一压接部21、第一子板211、过渡段212、
第二子板213、缺口214、工艺槽215、第二压接部22、焊接孔221、固定块222、工艺孔2221、 压接块223、凸筋224、第一侧面225、底面226、第一整形段227、第二侧面228、第二整形段229、连接板23、驱动机构30、第一限位机构31、第二限位机构32、焊接头200、焊接座210、电极组件定位槽300、电极组件900、本体910、极耳920。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，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、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“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申请实施例和简化描述，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申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“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；也可以是机械连接，也可以是电连接；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申请实施例中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
动力电池往往由一个或者多个电池单体构成，每个电池单体可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。
电池单体通常包括有一个或更多个电极组件900以及其他的功能性部件，电极组件900是电池单体中发生电化学反应的部件。电极组件900主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分卷绕构成电极组件900的本体910，正极片和负极片不具有活性物质的部分各自构成极耳920。
在电极组件900在加工制作过程中，从负极片上延伸出的不具有活性物质的部分可为铜箔或者铜镀镍箔，其呈条状延伸，将多层铜箔或者铜镀镍箔压实后焊接形成负极极耳；同理，从正极片上延伸出的不具有活性物质的部分可为铝箔，其呈条状延伸，将多层铝箔压实后焊接形成正极极耳。
正极极耳和负极极耳可以共同位于本体910的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳920可连接外部电极端子以形成电流回路。
本发明人注意到，相关技术中，电极组件900包括本体910以及极耳920，由于卷绕加工的制造方式，本体910往往呈扁平状，本体910的侧部为具有较大面积的电芯大面912，在本体910的端面上延伸出能够形成极耳920的多层带状材料，在未进行极耳920的焊接工序前，该多层带状材料是松散的结构，焊接过程中，往往由一个压板压接在电芯大面912上，并留出相应的空槽，而另一个压板单独从外部移动到空槽中，压接在极耳920上以进行焊接，两个压板之间没有定位，彼此在竖直方向上的位移偏差导致两个压板对本体910以及极耳920的压接出现松动；此外在压板从外部移动到空槽以及焊接完毕后从空槽移出的过程中，很有可能导致极耳920相对于本体910做出不必要的相对位移，进而导致多层带状材料出现晃动，导致虚焊的情况。
为了缓解因为定位偏差导致的虚焊的问题，申请人研究发现，两个压板之间如果不发生相对位移，则可以通过设计极耳920到本体910之间的距离，使得两个压板恰好能够同时分别压在极耳920到本体910上，进而可以在焊接的过程中同时压住本体910以及极耳920，防止极耳920与本体910出现松动。
基于以上考虑，为了改善因极耳920焊接质量的问题，发明人经过深入研究，设计了一种压板结构，通过固定连接的第一压接部21以及第二压接部22；第二压接部22沿第一方 向向下凸出于第一压接部21；第一压接部21沿第一方向活动设置在机架10上，当第一压接部21沿第一方向向下移动到最底端，第一压接部21抵触在电极组件900的本体910的电芯大面912，以防止本体910在焊接的过程出现晃动；第二压接部22能够压接在电极组件900的极耳920上，从而同时避免极耳920在焊接的过程出现晃动；有效地防止虚焊，提高焊接质量。
本申请实施例公开的压板结构以及焊接机可以用于一次电池或者二次电池的焊接加工，但不局限于此。
根据本申请的一些实施例，参照图1，并请进一步参照图2至图9，图1为根据本申请一些实施例的压板结构的三维示意图，图2至图4为根据本申请一些实施例的压板结构在不同视角下的结构示意图，图5为根据本申请一些实施例的第一压接部的结构示意图，图6至图8为根据本申请一些实施例的第二压接部在不同视角下的结构示意图，图9为根据本申请一些实施例的压板结构与电极组件、电极组件定位槽的装配关系示意图。
本申请的第一方面提供了一种压板结构100，用于电极组件900的焊接。
电极组件900包括本体910以及从本体910的端面911上延伸出的极耳920，可以理解的是，极耳920在未焊接之前为多层带状松散材料，焊接完毕后极耳920的各层材料之间彼此紧密连接为一体，可连接外部电极端子以形成电流回路。
压板结构100包括机架10以及压块单元20。
其中，压块单元20包括固定连接的第一压接部21以及第二压接部22。
第二压接部22沿第一方向向下凸出于第一压接部21。也即是说，第二压接部22相对于第一压接部21面向电极组件900的底面处于更靠下的位置，整体凸出于第一压接部21的底面。
第一压接部21沿第一方向活动设置在机架10上，以靠近或者远离电极组件900。第一压接部21抵触在电极组件900的本体910的侧面上，第二压接部22能够压接在电极组件900的极耳920上。
具体地，结合图1中所示出的方位以及图9所示，通过设计好第一压接部21与第二压接部22之间的高度差，当第一压接部21沿第一方向向下移动到最底端，第一压接部21抵触在电极组件900的本体910的电芯大面912上，以防止本体910在焊接的过程出现晃动；第二压接部22能够压接在电极组件900的极耳920上，从而同时避免极耳920在焊接的过程出现晃动；通过设置第一压接部21以及第二压接部22固定连接；使得第一压接部21与第二压接部22之间保持相对固定而不存在相对的位移，压块单元20整体压接在电极组件900上，避免了在焊接工序中第二压接部22的抽出插入动作，既简化焊接动作，实现了结构精简，避免了相关技术中的冗余的动作结构；还可以有效地防止第二压接部22在抽出插入动作过程中带动极耳920出现不必要的松动，有效地防止虚焊，提高焊接质量。
第二压接部22上形成有沿第一方向延伸的焊接孔221；当第二压接部22压接在电极组件900的极耳920，部分的极耳920被焊接孔221周围的结构压紧，由焊接孔221露出部分极耳920；方便由焊接头200(下文提及)穿过焊接孔221对露出在焊接孔221内的极耳920部分进行焊接，如此，可确保极耳920每一次焊接的部位都一致，提高焊接一致性。
在一些实施例中，在一些实施例中，第一压接部21以及第二压接部22可采用一体加工成型，结构强度高，彼此之间的高度差精度高。当然，在其他一些实施例中，第一压接部21以及第二压接部22可以分开加工，然后通过螺栓连接或者直接焊接，工艺简单，成本低。
在一些实施例中，参阅图7所示，在一些实施例中，第二压接部22上形成有两个焊接孔221，两个焊接孔221并排设置。通常一个电极组件900的本体910上具有两组极耳920，其中一组为正极极耳，另一组为负极极耳；一个电池单体可以包括两个电极组件900，两个电极组件900的正极极耳通过转接片(未标出)连接，两个电极组件900的负极极耳通过另一个转接片连接；两个焊接孔221并排设置，以能够同时露出两个电极组件900的正极极耳或者同时露出两个电极组件900的负极极耳，进而可以实现在同一道焊接工序对两个电极组件900的极耳920进行焊接，提高焊接效率。当然，在其他一些实施例中，第二压接部22上可形成有一个焊接孔221、三个或者更多的焊接孔221，本申请实施例不做限制。
在一些实施例中，参阅图7所示，在一些实施例中，焊接孔221的横截面呈矩形，在其他一些实施例中，焊接孔221的横截面可呈圆形、椭圆形或者三角形等。
可以理解的是，本申请各个实施例中，结合图1中所示出的方位，X方向即为第一方向，其通常可为竖直方向。在其他一些实施例中，第一方向也可以是其他方向，本申请对此不做限制。
在一些实施例中，参阅图1至图5、图9以及图10所示，第一压接部21包括第一子板211、过渡段212以及第二子板213。
第一子板211以及第二子板213可通过过渡段212一体连接，第一子板211以及第二子板213的长宽以及厚度形状通常相等且采用对称设计。但在其他一些实施例中，第一子板211以及第二子板213的长宽以及厚度形状也可以不相等，本申请实施例不做限制。
第一子板211以及第二子板213分别连接在过渡段212的左右两侧，过渡段212的长度短于第一子板211；过渡段212的长度短于第二子板213；如此，可以在第一子板211以及第二子板213之间形成缺口214。缺口214通常呈半口字形，也可以根据需要设计为半圆形或者其他形状。
第二压接部22至少部分设置在缺口214中。
具体地，当第一压接部21抵触在电极组件900上；第一子板211以及第二子板213分别压接在各一个电极组件900的本体910的电芯大面912上，以防止本体910在焊接的过程出现晃动；缺口214所对的位置正好位于两个电极组件900的极耳920的上方，如此，即 可以让第二压接部22同时压接在两个电极组件900的极耳920上，焊接头200能够依次穿过缺口214、焊接孔221对极耳920进行焊接。
在一些实施例中，第一压接部21通常为铝板或者碳钢板、不锈钢板，参阅图5所示，第一压接部21的底面形成有工艺槽215，用于与其他结构配合，避免干涉，同时还可以实现减重。
在一些实施例中，参阅图1至图4、图6至图9所示，第二压接部22包括固定块222以及压接块223。
固定块222与过渡段212可拆卸连接。
第一子板211、第二子板213以及过渡段212的底面通常处于同一水平面高度，将固定块222固定在过渡段212面向电极组件900的底面上，如此，固定块222可以过渡段212底部为原点，沿第一方向向下凸出一定距离，该距离可以通过设计固定块222的厚度来决定，具有工艺性好的优点。固定块222与过渡段212之间采用螺栓连接，方便拆卸维护。
当第一压接部21抵触在电极组件900上；第一子板211以及第二子板213分别压接在两个电极组件900的本体910的电芯大面912上，缺口214所对的位置正好位于两个电极组件900的极耳920的上方，固定块222与过渡段212可拆卸连接，压接块223位于缺口214中，焊接孔221沿第一方向贯穿压接块223，压接块223上的焊接孔221数量可为两个以对应两个电极组件900，如此，即可以让压接块223同时压接两个电极组件900的极耳920上，焊接头200能够依次穿过缺口214、焊接孔221对极耳920进行焊接。
在一些实施例中，在一些可能的实施例中，固定块222以及压接块223采用一体连接；可采用不锈钢、铝进行加工一体加工，连接强度好，尺寸偏差小。在其他一些实施例中，固定块222以及压接块223分开加工，再通过焊接或者螺栓固定连接。
在一些实施例中，参阅图6所示，固定块222上设置有多个工艺孔2221，在不影响结构强度的前提下，尽可能的降低第二压接部22的重量，进而减轻整个焊接机的重量。
在一些实施例中，参阅图7以及图9所示，压接块223面向极耳920的底面226上形成有凸筋224。
当第一压接部21抵触在电极组件900上；第一子板211以及第二子板213分别压接在两个电极组件900的本体910的电芯大面912上，缺口214所对的位置正好位于两个电极组件900的极耳920的上方，压接块223位于缺口214中，压接块223压接在电极组件900的极耳920上，压接块223面向极耳920的底面226上形成的凸筋224，可以有效地缩小压接块223与极耳920的接触面积，在压接力度不变的前提下，增加单位面积的压强，使得压接块223压接极耳920更稳定，防止其出现松动，焊接孔221沿第一方向贯穿压接块223，焊接头200能够依次穿过缺口214、焊接孔221对极耳920进行焊接；从而避免虚焊，提高焊接质量。
在一些实施例中，参阅图7所示，凸筋224环绕布置在焊接孔221的四周，使得焊接孔221四周的区域对极耳920的压接更稳定，避免松动。
在其他一些实施例中，凸筋224也可以采用多道直线布置，本申请实施例不做限制。
在一些实施例中，参阅图2和图9所示；压接块223靠近第一子板211的第一侧面225与压接块223面向极耳920的底面226的交界处形成有第一整形段227。压接块223靠近第二子板213的第二侧面228与压接块223面向极耳920的底面226的交界处形成有第二整形段229。
第一整形段227与第二整形段229可为斜面或者光滑弧面。
当第一压接部21抵触在电极组件900上；第一子板211以及第二子板213分别压接在两个电极组件900的本体910的电芯大面912上，压接块223压接在两个电极组件900的极耳920上，第一整形段227与第二整形段229沿第一方向向下运动直至抵触在极耳920与本体910的根部区域上；需要理解的是，极耳920在未焊接前属于多层松散结构，极耳920的根部具有较多的空隙，且难以被压接块223的底面226压实，导致容易出现空洞；而如果第一侧面225与底面226之间为尖锐的直角结构，第二侧面228与底面226形成为尖锐的直角结构，直接挤压在多层结构的极耳920上，会导致在极耳920的最外层出现撕裂；通过设置第一整形段227与第二整形段229，形成为一个光滑弧面或者过度的斜面，提供一个整形功能，既可以避免极耳920形成空洞，又可以防止极耳920在焊接过程中出现撕裂情况，有效的提高焊接质量。
在一些实施例中，参阅图1至图4、以及图10所示，压板结构包括驱动机构30。
驱动机构30固定在机架10上，驱动机构30与第一压接部21传动连接，以驱动第一压接部21沿第一方向活动靠近或者远离电极组件900。
驱动机构30可为气缸或者电机。
以驱动机构30为气缸为例，驱动机构30的动作轴(未标出)可以设置沿第一方向的第一限位机构31以及第二限位机构32，参阅图2所示，第一限位机构31以及第二限位机构32可以是沿第一方向设置的两个挡块，用于限制驱动机构30的动作长度。
具体地，驱动机构30驱动第一压接部21沿第一方向向下运动，直至驱动机构30的动作轴被第一限位机构31限制，此时第一压接部21抵触在电极组件900上；第一子板211以及第二子板213分别压接在两个电极组件900的本体910的电芯大面912上，压接块223同时压接两个电极组件900的极耳920上，焊接头200能够依次穿过缺口214、焊接孔221对极耳920进行焊接。本处的沿第一方向向下，也即是第一压接部21靠近电极组件900。
焊接完毕后，驱动机构30驱动第一压接部21沿第一方向向上运动，直至驱动机构30的动作轴被第二限位机构32限制，此时第一子板211以及第二子板213均离开个电极组件900的本体910的电芯大面912上，压接块223也离开两个电极组件900的极耳920上， 方便焊接好的电极组件900移走进行下一道工序，并为装入新的待焊接的电极组件900腾出空间。
在一些实施例中，第一限位机构31以及第二限位机构32可以为磁感应器，驱动机构30的进气腔中可串联调气阀门(未标出)，当第一限位机构31以及第二限位机构32感应到驱动机构30运动到相应的位置，向调气阀门发出指令，开闭驱动机构30的进气，以实现驱动机构30驱动第一压接部21沿第一方向活动靠近或者远离电极组件900。
在一些实施例中，参阅图1至图4所示，压块单元20包括连接板23，连接板23与驱动机构30连接，连接板23连接在第一压接部21背离电极组件900的一面。
驱动机构30的动作轴连接在连接板23的中部，连接板23的中部固定在过渡段212上，连接板23的两侧分别延伸到第一子板211以及第二子板213，由此，确保驱动机构30驱动第一压接部21的过程中不会发生偏斜，确保压块单元20对电极组件900的压接效果，进而避免出现虚焊等情况，提高焊接质量。
连接板23与第一子板211、连接板23与第二子板213之间可采用螺栓连接或者焊接。
本申请的第二方面提供一种焊接机，包括上述的压板结构100。
在一些实施例中，参阅图9以及图10所示，本申请的焊接机为超声波焊接机；其通常可包括焊接头200、焊接座210以及电极组件定位槽300等结构；将电极组件900安置在电极组件定位槽300中，由驱动机构30驱动第一压接部21以及第二压接部22分别压接在电极组件900的本体910以及极耳920，焊接头200、焊接座210沿竖直方向分别对极耳920进行完成超声波焊接。
最后应说明的是：以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (11)

  1. 一种压板结构，包括：
    机架(10)；
    以及压块单元(20)，所述压块单元(20)包括固定连接的第一压接部(21)以及第二压接部(22)，所述第一压接部(21)沿第一方向活动设置在所述机架(10)上以靠近或者远离电极组件(900)；所述第二压接部(22)沿所述第一方向向下凸出于所述第一压接部(21)；所述第二压接部(22)上形成有沿所述第一方向延伸的焊接孔(221)；
    所述第二压接部(22)能够压接在所述电极组件(900)的极耳(920)上，且所述焊接孔(221)露出部分所述极耳(920)。
  2. 根据权利要求1所述的压板结构，所述第一压接部(21)包括第一子板(211)、过渡段(212)以及第二子板(213)；
    所述第一子板(211)以及所述第二子板(213)分别连接在所述过渡段(212)的左右两侧，所述过渡段(212)的长度短于所述第一子板(211)以形成缺口(214)；
    所述第二压接部(22)至少部分设置在所述缺口(214)中。
  3. 根据权利要求2所述的压板结构，所述第二压接部(22)包括固定块(222)以及压接块(223)，所述固定块(222)与所述过渡段(212)可拆卸连接，所述压接块(223)位于所述缺口(214)中，所述焊接孔(221)沿所述第一方向贯穿所述压接块(223)。
  4. 根据权利要求3所述的压板结构，所述压接块(223)面向所述极耳(920)的底面上形成有凸筋(224)。
  5. 根据权利要求4所述的压板结构，所述凸筋(224)环绕布置在所述焊接孔(221)的四周。
  6. 根据权利要求3至5任一项所述的压板结构，所述压接块(223)靠近所述第一子板(211)的第一侧面与所述压接块(223)面向所述极耳(920)的底面的交界处形成有第一整形段(227)；和/或，
    所述压接块(223)靠近所述第二子板(213)的第二侧面与所述压接块(223)面向所述极耳(920)的底面的交界处形成有第二整形段(229)。
  7. 根据权利要求1至6任一项所述的压板结构，所述压板结构包括驱动机构(30)；
    所述驱动机构(30)固定在所述机架(10)上，所述驱动机构(30)与所述第一压接部(21)传动连接，以驱动所述第一压接部(21)沿第一方向活动靠近或者远离所述电极组件(900)。
  8. 根据权利要求7所述的压板结构，所述压块单元(20)包括连接板(23)，所述连接板(23)与所述驱动机构(30)连接，所述连接板(23)连接在所述第一压接部(21)背离 所述电极组件(900)的一面。
  9. 根据权利要求1至8任一项所述的压板结构，所述第一压接部(21)以及所述第二压接部(22)一体连接。
  10. 一种焊接机，包括如权利要求1至9任一项所述的压板结构(100)。
  11. 根据权利要求10所述的焊接机，所述焊接机为超声波焊接机。
PCT/CN2023/084728 2022-11-16 2023-03-29 压板结构以及焊接机 WO2024103595A1 (zh)

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